Module motor, camera module, electronic equipment and preparation method of shell

Abstract

The invention relates to the technical field of terminals, in particular to a module motor, a camera module, electronic equipment and a preparation method of a shell. The module motor comprises a base, a carrying seat, a driving assembly and a shell, an accommodating cavity with an opening is formed in the shell; the carrying seat and the driving assembly are arranged in the containing cavity, the driving assembly is connected between the carrying seat and the base, and the driving assembly is used for driving the carrying seat to move relative to the base in the direction perpendicular to the base; the shell is further provided with a stop structure, the stop structure comprises a connecting part and a first stop part, the connecting part and the first stop part are of an injection molding integrated structure, the connecting part is embedded in the through hole, and the first stop part extends into the containing cavity to be used for bearing impact of the carrying base. The hardness of the stop structure is larger than or equal to 20 Shore hardness. The backstop structure can be formed through injection molding of the through hole and can be implemented at any position of the shell so as to prevent the carrying seat from colliding with the shell; and the backstop structure is small in occupied space, so that miniaturization of the device is facilitated.

Description

Method for preparing module motor, camera module, electronic device and housing

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 17, 2022, with application number 202210690823.6 and application name “Method for preparing module motor, camera module, electronic device and housing”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of terminal technology, and in particular to a method for preparing a module motor, a camera module, an electronic device, and a housing. Background Art

[0004] In recent years, camera functionality has become a key performance factor for consumers in portable electronic devices. Typically, a camera module motor is used to achieve focus. A camera module motor consists of a fixed portion, which is fixed to the electronic device's housing, and a moving portion, which is connected to the optical device. The moving portion can reciprocate relative to the fixed portion in a set direction, thereby driving the optical device to achieve camera focus.

[0005] In order to protect optical devices, a stopper wall is provided inside the housing of the electronic device. However, the current stopper wall is large in size and requires a certain amount of space for arrangement, which is not conducive to miniaturization of the electronic device.

[0006] Summary of the Invention

[0007] The present application provides a method for preparing a module motor, a camera module, an electronic device and a housing, which not only provides good impact protection but also facilitates the miniaturization of the device.

[0008] In a first aspect, the present application provides a module motor that can be applied to devices with camera functions. The module motor includes a base, a carrier, a drive assembly, and a shell; the base can provide support for other structures. The shell is fixed on the base, and the shell forms a receiving cavity with an opening, and the base is fixed to one side of the opening of the shell. The receiving cavity of the shell can be used to set the carrier and the drive assembly. The drive assembly has a fixed part and a movable part, the fixed part is fixed to the base, and the movable part is connected to the carrier, and the movable part can move relative to the fixed part, thereby driving the carrier to move relative to the base. Here, the movement direction of the carrier is perpendicular to the base. A through hole and a stop structure are provided on the shell. With reference to the receiving cavity of the shell, the shell has an inner surface and an outer surface, and the through hole passes through the inner surface and the outer surface. The stop structure includes a connecting portion and a first stop portion. The connecting portion and the first stop portion are injection-molded integral structures. The connecting portion is embedded in the through hole, and the first stop portion protrudes from the inner surface, that is, the first stop portion extends into the above-mentioned accommodating cavity. The first stop portion can be used to withstand the impact of the carrier. The hardness of the stop structure can reach a Shore hardness greater than or equal to 20. When the carrier moves and hits the first stop portion, the first stop portion can maintain a relatively stable structural form and will not undergo large deformation, thereby achieving a good impact resistance. When the carrier moves in the accommodating cavity, the first stop portion can provide impact protection for the movable portion to prevent the carrier from directly hitting the shell. The stop structure can be formed by through-hole injection molding and can be implemented at any position of the shell without being affected by the position of other components. In addition, the stop structure occupies a small space, which is conducive to miniaturization of the device.

[0009] The orthographic projection of the first stop portion on the housing can cover the through hole. The first stop portion is used to bear the impact of the carrier, and its larger coverage area can provide better impact protection.

[0010] Possibly, along the direction perpendicular to the axis of the through hole, the distance between the edge of the first stop portion and the edge of the through hole is greater than or equal to the maximum radial dimension of the through hole. Based on the greater hardness of the stop structure, it can be considered that a first stop portion with a larger coverage area can be achieved through a smaller through hole, thereby forming a larger impact surface to meet the impact protection requirements. Specifically, along the direction perpendicular to the axis of the through hole, the distance between the edge of the first stop portion and the edge of the through hole is at least twice the maximum radial dimension of the through hole. For example, the maximum radial dimension of the through hole is 0.4 mm, and the distance between the edge of the first stop portion and the axis of the through hole is 1 mm-2 mm.

[0011] In one possible implementation, the stop structure further includes a second stop portion. The second stop portion and the connecting portion are integrally injection-molded. The second stop portion protrudes from the outer surface, that is, the second stop portion extends outside the housing. The first stop portion and the second stop portion are connected by the connecting portion. The second stop portion can withstand impact from external structures of the housing and enhance the structural stability of the stop structure. The orthographic projection of the second stop portion on the housing can also cover the through-hole.

[0012] In order to improve the structural stability of the stop structure, the housing is further provided with a supporting structure, and the supporting structure extends into the stop structure.

[0013] In one possible implementation, the support structure is in a straight line shape, both ends of the stop structure are fixed to the inner wall of the through hole, and the support structure passes vertically through the axis of the through hole.

[0014] In another possible implementation, the support structure includes two support portions, each secured to the inner wall of the through-hole and arranged symmetrically about the axis of the through-hole. Each support portion may be arranged obliquely relative to the axis of the through-hole, with one end secured to the inner wall of the through-hole and the other end extending toward the accommodating cavity. Furthermore, a bend may be formed at the free end of each support portion to further enhance the stability of the support structure's support of the stop structure.

[0015] Among them, the shell can specifically include a top and a side, and the side is arranged around the edge of the top to form the above-mentioned accommodating cavity; a stop structure can be set on the top, a stop structure can be set on the side, or a stop structure can be set on both the top and the side.

[0016] When the stop structure is arranged on the side, the height of the stop structure extending into the housing cavity is 0.1-0.5 mm. When the stop structure is arranged on the top, the height of the stop structure extending into the housing cavity is 0.1-0.5 mm.

[0017] The material of the stop structure includes any one of liquid crystal polymer (LCP), thermoplastic polyurethane rubber, thermoplastic elastomer, silicone, and foam. The material of the housing includes any one of stainless steel and liquid crystal polymer.

[0018] When the module motor is a voice coil motor (VCM), the drive assembly includes a drive magnet and a drive coil. The drive magnet is fixed to the bottom of the carrier, and the drive coil is fixed to the base. The drive coil and the drive magnet correspond to each other, and electromagnetic induction is achieved between them. When the drive coil is energized, the current in the drive coil generates an electric field. The drive magnet in this electric field moves due to the principle of electromagnetic induction, thereby driving the carrier.

[0019] Possibly, an elastic structure is provided between the module motor and the carrier, and the elastic structure may be a spring. Along the height direction of the carrier, the stop structure corresponds to the elastic structure. In other words, the stop structure and the elastic structure may not interfere with each other.

[0020] In a second aspect, the present invention provides a camera module, comprising a lens and the above-mentioned module motor, wherein the lens is arranged on a mount of the module motor, and when the lens moves with the mount, the camera module can be focused.

[0021] In a third aspect, the present invention provides an electronic device, such as a smartphone or tablet computer, having a camera function. The electronic device comprises a device body and the camera module, wherein the camera module is mounted on the device body, so that the electronic device has a good camera function.

[0022] In a fourth aspect, the present invention provides a method for preparing a housing for any of the above-mentioned modular motors, wherein the housing has a receiving cavity. The method comprises the following steps:

[0023] Punching a hole in the shell to form a through hole; the through hole can penetrate the inner surface and the outer surface of the shell;

[0024] A stop structure extending into the receiving cavity of the housing in the form of a through hole.

[0025] In one possible implementation, after punching a hole in the module motor to form a through hole and before forming a stopper structure extending into the accommodating cavity of the housing through the through hole, the following steps are further included:

[0026] A support structure is formed within the through hole.

[0027] The step of forming a stopper structure extending into the accommodating cavity of the housing through the through hole includes the following steps:

[0028] Providing a mold, the mold having an inner cavity;

[0029] placing the shell in the mold so that the through hole communicates with the inner cavity;

[0030] injecting liquid material into the inner cavity;

[0031] The liquid material cools to form a stopper structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1a is a schematic cross-sectional view of a camera module motor in the prior art;

[0033] FIG1b is a schematic diagram of a cross-sectional structure of a camera module motor in the prior art, viewed from above;

[0034] FIG2a is a schematic structural diagram of a modular motor provided in an embodiment of the present application;

[0035] FIG2 b is a schematic structural diagram of a housing in a modular motor provided in an embodiment of the present application;

[0036] FIG2c is a schematic structural diagram of a housing in a modular motor provided in an embodiment of the present application;

[0037] FIG3a is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0038] FIG3 b is a schematic structural diagram of a through hole on a housing in a modular motor provided in an embodiment of the present application;

[0039] FIG3c is a schematic structural diagram of a through hole on a housing in a modular motor provided in an embodiment of the present application;

[0040] FIG3 d is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0041] FIG3e is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0042] FIG4 is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0043] FIG5 is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0044] FIG6 is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0045] FIG7 is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0046] FIG8 is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0047] FIG9a is a schematic structural diagram of a housing in a modular motor provided in an embodiment of the present application;

[0048] FIG9b is a schematic diagram of the cross-sectional structure of the plane where M1-M1 in FIG9a is located;

[0049] FIG10a is a schematic structural diagram of a housing in a modular motor provided in an embodiment of the present application;

[0050] FIG10b is a schematic diagram of the cross-sectional structure of the plane where M2-M2 in FIG10a is located;

[0051] FIG11 is a schematic cross-sectional view of a housing in a modular motor provided in an embodiment of the present application;

[0052] FIG12a is a schematic structural diagram of a housing in a modular motor provided in an embodiment of the present application;

[0053] FIG12b is a schematic diagram of the cross-sectional structure of the plane where M3-M3 in FIG12a is located;

[0054] FIG13 is a schematic structural diagram of a housing in a modular motor provided in an embodiment of the present application;

[0055] FIG14a is a top view of a modular motor provided in an embodiment of the present application;

[0056] FIG14b is a schematic diagram of the cross-sectional structure of the plane N1-N1 in FIG14a;

[0057] Figure 14c is an enlarged view of portion C in Figure 14b;

[0058] FIG15a is a front view of a modular motor provided in an embodiment of the present application;

[0059] FIG15b is a schematic diagram of the cross-sectional structure of the plane N2-N2 in FIG15a;

[0060] Figure 15c is an enlarged view of portion D in Figure 15b;

[0061] FIG16 is a schematic structural diagram of a camera module provided in an embodiment of the present application;

[0062] FIG17a is a top view of a camera module provided in an embodiment of the present application;

[0063] FIG17b is a schematic diagram of the cross-sectional structure of the plane N3-N3 in FIG17a;

[0064] FIG18 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0065] FIG19a is a schematic diagram of a process for preparing a shell according to an embodiment of the present application;

[0066] FIG19 b is a schematic diagram of a process for preparing a shell according to an embodiment of the present application;

[0067] FIG19c is a schematic flow chart of a method for preparing a shell provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] The camera function is an important parameter for measuring the performance of electronic equipment. The camera module generally drives the lens and other optical devices to move through the camera module motor to achieve the camera focus function. Among them, the camera module motor includes a fixed part and a movable part, as shown in Figure 1a and Figure 1b. The fixed part is such as the base 11' of the camera module motor and the side wall 12' fixed to the base 11', and the movable part is such as the carrier 3' of the camera module motor. The camera module motor can drive the carrier 3' to move in a predetermined direction relative to the base 11' by electromagnetic drive or other means. In this process, in order to avoid the movable part and the fixed part from colliding and being damaged, a stop wall 2' is generally provided on the side of the fixed part facing the movable part. Figure 1a shows the cross-sectional structure of the camera module motor in the main view state. The stop wall 2' is fixed to the base 11' and extends along the side wall 12'. It is not only large in size, but can only grow on the base 11' and attached to the side wall 12'. Figure 1b shows the cross-sectional structure of the camera module motor from a top view. The stop wall 2' must be positioned to avoid interference with other components, using the spring 4' as an example. To avoid interference with the spring 4', the stop wall 2' cannot be positioned at the corner of the camera module, which imposes numerous design and manufacturing limitations. This shows that conventional stop and impact-resistant structures are detrimental to the miniaturization of electronic devices.

[0069] Therefore, embodiments of the present application provide a method for manufacturing a modular motor, a camera module, an electronic device, and a housing. When used in a device having a fixed portion and a movable portion, the modular motor can withstand impacts through a relatively small stop structure, achieving impact protection. Furthermore, the stop structure is not restricted by other device structures, facilitating device miniaturization.

[0070] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0071] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0072] As shown in Figure 2a, an embodiment of the present application provides a module motor 100, which can be used to drive the lens of an electronic device to achieve focusing movement. As shown in Figure 2a, the module motor 100 includes a base 30, a carrier 20, a drive assembly and the above-mentioned shell 1, and the drive assembly is not shown here. The shell 1 is fixed to the base 30, and the shell 1 and the base 30 can serve as fixed parts. When the shell 1 is fixed to the base 30, the carrier 20 and the drive assembly can be arranged between the base 30 and the shell 1. Specifically, the base 30 and the carrier 20 are connected by the drive assembly. When the module motor 100 is working, the drive assembly can drive the carrier 20 to move in a direction perpendicular to the base 30, that is, the drive assembly can drive the carrier 20 to move closer to or away from the base 30. In Figure 2a, the direction perpendicular to the base 30 is the Z direction, which can also be regarded as the height direction of the shell 1.

[0073] When the module motor 100 is a voice coil motor, the driving assembly can specifically include a driving magnet and a driving coil. The driving magnet can be fixed to the bottom of the carrier 20, and the driving coil can be set on the base 30, with the driving coil corresponding to the driving magnet. There is an electromagnetic induction relationship between the driving magnet and the driving coil. When the driving coil is energized, a magnetic field is generated, and the driving magnet in the magnetic field can be driven; when the driving coil is energized, the driving magnet in the electromagnetic field will be moved by the force; in the specific structure, the driving magnet is connected to the carrier 20, and when the driving coil can drive the driving magnet to move, the driving magnet can drive the carrier 20 to move along the set direction. It should be understood that according to different usage requirements, the voice coil motor can be specifically open-loop, closed-loop, optical image stabilizer (OIS), etc., and is not limited here.

[0074] The housing 1 specifically includes a top 11 and a side 12. The top 11 is rectangular, and the side 12 is arranged around the edge of the top 11, so that a space that can accommodate the carrier 20 and the drive assembly can be formed between the side 12 and the top 11. The base 30 is connected to the side 12. The top 11 is perpendicular to the Z direction, and the plane where the top 11 is located is parallel to the X direction and the Y direction. The carrier 20 can be used to carry optical devices such as lenses, thereby driving optical devices such as lenses to move and achieve zooming. In order to facilitate optical devices such as lenses to extend out of the housing 1, a notch T is provided at the top 11 of the housing 1 away from the base 30. Here, the notch T is circular.

[0075] As shown in Figures 2b and 2c , an opening can be formed between the side portion 12 and the top portion 11 to form a receiving cavity P. This receiving cavity P can be used to accommodate the aforementioned carrier 20 and drive assembly. The opening of the receiving cavity P refers to the side of the housing 1 that is connected to the base 30. A stopper structure 2 is provided on the housing 1, extending through the housing 1. This stopper structure 2 can extend into the receiving cavity P of the housing 1, allowing the stopper structure 2 to absorb impacts from the carrier 20 and dissipate impact stress. This prevents the carrier 20 from colliding with the inner wall of the housing 1 during movement, thereby protecting the carrier 20 and optical devices such as lenses mounted thereon.

[0076] Referring to Figure 3a, the housing 1 has an inner surface a1 and an outer surface a2. The terms inner surface a1 and outer surface a2 are relative terms. Generally, the surface of the housing 1 facing the accommodating cavity P is referred to as the inner surface a1, and the surface of the housing 1 facing away from the accommodating cavity P is referred to as the outer surface a2.

[0077] Among them, a through hole A is provided on the shell 1, and the through hole A can penetrate the inner surface a1 and the outer surface a2. The external space on the outer surface a2 side of the shell 1 can be connected with the space of the accommodating cavity P on the inner surface a1 side through the through hole A. The axial centerline Q of the through hole A is the extension direction of the through hole A. A stop structure 2 is provided on the shell 1, and the stop structure 2 is embedded in the through hole A. The stop structure 2 protrudes from the inner surface a1 of the shell 1, that is, the stop structure 2 can partially extend into the accommodating cavity P. When the carrier 20 accommodated in the accommodating cavity P moves relative to the base 30, the stop structure 2 can prevent direct collision between the carrier 20 and the shell 1, thereby protecting the equipment components.

[0078] The shape of through hole A is not limited. As shown in FIG3b , the cross-section of through hole A perpendicular to axis Q can be rectangular. As shown in FIG3c , the cross-section of through hole A perpendicular to axis Q can be circular. Generally, through hole A is formed into a relatively regular shape to facilitate injection molding of stop structure 2.

[0079] As shown in Figures 3d and 3e, the housing 1 has a top 11 and side portions 12 extending around the edges of the top 11. For example, the top 11 is parallel to the plane of the X and Y directions. The side portions 12 are perpendicular to the top 11, that is, perpendicular to the X and Y directions, and extend along the Z direction. The X and Y directions can be considered radial directions of the housing 1, and the Z direction can be considered the height direction of the housing 1. With reference to the modular motor 100, the carrier 20 can move relative to the top 11 along the height direction of the housing 1.

[0080] As shown in Figure 3d, the stop structure 2 can be disposed on the side portion 12. The stop structure 2 protrudes from the inner surface a1 of the side portion 12. Along the extension direction of the axis Q of the through hole A, the stop structure 2 protrudes from the inner surface a1 of the side portion 12 by a height d1. Here, d1 can be 0.1-0.5 mm, for example, 0.25 mm. This reduces the radial dimension of the stop structure 2 in the housing 1, reducing the space occupied by the stop structure 2 and, consequently, the footprint of the modular motor 100. Compared to the thicker stop wall in the prior art, this can result in a reduced radial dimension of the modular motor 100.

[0081] As shown in FIG3e , the stopper structure 2 can also be disposed on the top portion 11 . The stopper structure 2 protrudes from the inner surface a1 of the top portion 11 . Along the extension direction of the axis Q of the through hole A, the stopper structure 2 protrudes from the inner surface a1 of the side portion 12 by a height d2 . Here, d2 can be 0.1-0.5 mm, for example, 0.2 mm. This reduces the height dimension of the stopper structure 2 in the housing 1 , reducing the space occupied by the stopper structure 2 and, in turn, the space occupied by the modular motor 100 . This also results in a reduced size in the height dimension of the modular motor 100 .

[0082] Of course, in a specific implementation, the stop structure 2 can be provided only on the side 12 of the housing 1 as shown in FIG3d , or only on the top 11 of the housing 1 as shown in FIG3e , or can be provided on both the side 12 and the top 11. Furthermore, the number and specific location of the stop structures 2 are not limited.

[0083] In the module motor 100 provided in the embodiment of the present application, the stop structure 2 is formed by injection molding. During preparation, the liquid injection molding material can be injected into the mold through the through hole A to form the stop structure 2. Since the stop structure 2 is injection molded through the through hole A, a smaller-sized stop structure 2 can be obtained by injection molding as needed, and will not occupy a larger volume of the accommodating cavity P of the shell 1, which is conducive to the miniaturization of the module motor 100. In addition, by injecting the stop structure 2 through the through hole A, the stop structure 2 can be set at any desired position, decoupled from other device structures of the module motor 100, and convenient for implementation. When the module motor 100 is applied to device modules such as camera modules, it can meet the miniaturization requirements of the device.

[0084] As shown in Figure 4 , the stopper structure 2 specifically comprises a connecting portion 21 and a first stopper 22. The connecting portion 21 and the first stopper 22 are integrally injection-molded structures. The connecting portion 21 is embedded within the through-hole A, while the first stopper 22 protrudes from the inner surface a1 of the housing 1. Using the inner surface a1 as the boundary and the housing cavity P of the housing 1 as a reference, the first stopper 22 can be considered to be located within the housing cavity P. The shape of the connecting portion 21 matches that of the through-hole A. The injection-molded connecting portion 21 tightly integrates with the through-hole A, providing stable support for the first stopper 22 with the help of the housing 1.

[0085] In the embodiment of the present application, the purpose of setting the stop structure 2 is to prevent the device structure in the shell 1 from directly colliding with the inner surface a1 of the shell 1. When the carrier 20 moves, the carrier 20 can collide with the first stop portion 22 of the stop structure 2. The first stop portion 22 provides impact bearing for the carrier 20, shares and reduces the impact stress, thereby protecting the carrier 20 and other structures that may be mounted on the carrier 20. Therefore, when the device structure collides with the first stop portion 22, the impact surface of the first stop portion 22 used to bear the impact needs to maintain a certain stability and cannot undergo large structural deformation. Here. The hardness of the stop structure 2 needs to meet the requirement of a Shore hardness greater than or equal to 20. The hardness of the stop structure 2 can be 20 Shore hardness, 40 Shore hardness, 70 Shore hardness, 100 Shore hardness, etc. When the carrier 20 on the inner surface a1 of the shell 1 hits the first stop portion 22 of the stop structure 2 , the first stop portion 22 can resist the pressure of the carrier 20 to prevent the carrier 20 from making structural contact or hitting the inner surface a1 of the shell 1 .

[0086] Specifically, the material of the stop structure 2 can be selected from any one of liquid crystal molecular polymer, thermoplastic polyurethane rubber, and thermoplastic elastomer. Alternatively, silicone with higher hardness can also be used. Among them, liquid crystal molecular polymer is an intermediate state polymer between solid crystal and liquid, with high strength, high modulus and excellent molding and processing performance. The use of liquid crystal molecular polymer to make the stop structure 2 can play a good anti-collision effect between the shell 1 and the device. The material of the shell 1 can specifically include any one of stainless steel and liquid crystal molecular polymer. The hardness of the shell 1 generally needs to be higher than the hardness of the stop structure 2 to play a good load-bearing and supporting role.

[0087] The stop structure 2 uses a stop material with a relatively high hardness, and the size of the first stop part 22 in the stop structure 2 can be made large enough to achieve a good stopping effect. The size of the first stop part 22 here refers to the size of the first stop part 22 perpendicular to the axis Q of the through hole A. As shown in Figure 5, with the inner surface a1 on which the stop structure 2 is provided as a reference, the radial dimension of the through hole A is B1. Among them, the radial dimension of the through hole A is the size of the through hole A perpendicular to the axis Q of the through hole A. Since the shape of the through hole A perpendicular to the axis Q may be circular, the radial dimension B1 of the through hole A here is the diameter of the circle. The shape of the through hole A perpendicular to the axis Q may also be other shapes (such as a rectangle), and the radial dimension B1 of the through hole A here can be considered as the maximum radial dimension of the through hole A. The minimum radial dimension of the first stop part 22 perpendicular to the axis Q of the through hole A is B2. Perpendicular to the axis Q of through-hole A, the minimum radial dimension B2 of the first stopper 22 is greater than the maximum radial dimension of through-hole A, allowing the first stopper 22 to cover through-hole A. In other words, a larger first stopper 22 can be injection molded from a smaller through-hole A. The larger first stopper 22 provides a larger impact surface, thereby achieving excellent impact resistance. The orthographic projection of the first stopper 22 on the inner surface a1 covers the through-hole A. The connecting portion 21 mates with the through-hole A, and the orthographic projection of the first stopper 22 on the inner surface a1 also covers the connecting portion 21.

[0088] As shown in Figure 6, along a direction perpendicular to the axis Q of through-hole A, the distance between the edge of the orthographic projection of the first stop 22 on the inner surface a1 and the edge of through-hole A is S. This distance S is at least equal to the diameter of through-hole A. In some embodiments, this distance S is greater than or equal to twice the diameter of through-hole A. For example, if the maximum radial dimension of through-hole A is 0.4 mm, the distance between the edge of the orthographic projection of the first stop 22 on the inner surface a1 and the edge of through-hole A is 1-2 mm. It should be understood that, along a direction perpendicular to the axis Q of through-hole A, the distance between the edge of the first stop 22 on the inner surface a1 and the edge of the connector 21 is also the distance between the edge of the orthographic projection of the first stop 22 on the inner surface a1 and the edge of the connector 21. Furthermore, the inner surface a1 in the orthographic projection of the first stop 22 on the inner surface a1 refers to the portion of the connector 21 that the first stop 22 contacts. Therefore, in the embodiments of the present application, a larger first stop 22 can be obtained by injection molding a smaller through-hole A, meeting the impact resistance requirements of the device.

[0089] In some embodiments, as shown in FIG7 , the stop structure 2 further includes a second stop portion 23. The second stop portion 23 and the connector 21 are also injection-molded integral structures, i.e., the connector 21, the first stop portion 22, and the second stop portion 23 of the stop structure 2 are all injection-molded integral structures. Along the extension direction of the axis Q of the through hole A, the second stop portion 23, the connector 21, and the first stop portion 22 are arranged in sequence. The second stop portion 23 protrudes from the outer surface a2 of the housing 1, i.e., the second stop portion 23 extends outward from the housing 1 in a direction away from the cavity of the housing 1. When a movable portion such as a carrier 20 is provided on one side of the inner surface a1 of the housing 1 and a movable portion is also provided on the outer surface a2, the first stop portion 22 can provide impact resistance for the movable portion such as the carrier 20 on the inner surface a1 side, and the second stop portion 23 can provide impact resistance for the movable portion on the outer surface a2 side.

[0090] Possibly, as shown in FIG8 , the size of the second stop portion 23 can also be made sufficiently large. The size of the second stop portion 23 here refers to the size of the first stop portion 22 perpendicular to the axis Q of the through hole A. With reference to the outer surface a2 provided with the stop structure 2, the orthographic projection of the outer surface a2 of the second stop portion 23 covers the through hole A. The larger size of the first stop portion 22 can provide a larger impact surface area, thereby achieving a good impact resistance effect. The connecting portion 21 is adapted to the through hole A, and the orthographic projection of the second stop portion 23 on the outer surface a2 also covers the connecting portion 21.

[0091] In combination with the above embodiments, the impact surface of the stop structure 2 used to bear the impact needs to maintain a certain stability. In order to increase the dimensional stability of the stop structure 2, a support structure 3 can be provided on the shell 1, and the support structure 3 can be fixed to the shell 1 and extend into the inside of the stop structure 2. As shown in Figure 9a, taking the through hole A on the shell 1 as a square hole as an example, a support structure 3 is provided in the through hole A. The support structure 3 is covered by the stop structure 2 and is therefore shown in dotted lines. The support structure 3 is a "one-shaped" strip, and the support structure 3 has a large aspect ratio. The two ends of the support structure 3 are respectively fixed to the inner wall of the through hole A, and the support structure 3 passes through the axial center line Q of the through hole A. The through hole A can be divided into two parts along the radial direction of the through hole A, that is, the through hole A is symmetrical about the center of the support structure 3. After the stop structure 2 is obtained by injection molding, the support structure 3 can extend into the stop structure 2. Cutting the shell 1 along the plane where M1-M1 is located in Figure 9a can obtain a cross-sectional structural schematic diagram shown in Figure 9b. In Figure 9b, the stop structure 2 covers the support structure 3, which can act as a reinforcement structure to improve the structural stability of the stop structure 2 when it is impacted and meet the impact resistance requirements. It should be understood that the support structure 3 can be an integrated structure with the housing 1.

[0092] In one embodiment, as shown in Figure 10a, the support structure 3 specifically includes two support parts 31, one end of each support part 31 is fixed to the inner wall of the through hole A, and the other end of the support part 31 extends into the stop structure 2. The two support parts 31 are covered by the stop structure 2, as shown by dotted lines. In order not to affect the structural uniformity of the stop structure 2, the two support parts 31 are symmetrical about the axis Q of the through hole A, that is, the two support parts 31 rotate 180° with the axis Q of the through hole A as the rotation center, and the position structure of the two support parts 31 and the through hole A will not change. Cutting the shell 1 along the plane where M2-M2 is located in Figure 10a, a cross-sectional structural schematic diagram shown in Figure 10b can be obtained. In Figure 10b, the stop structure 2 covers the support structure 3, and the support structure 3 can act as a reinforcing structure to improve the structural stability of the stop structure 2 when it is impacted and meet the impact resistance. It should be understood that the two support parts 31 can be an integrated structure with the shell 1.

[0093] To enhance the stability of the support structure 3 on the stop structure 2, as shown in Figure 11, the two support portions 31 can be arranged in an inclined configuration. One end of each support portion 31 is fixed to the inner wall of the through hole A, and the other end extends toward the accommodating cavity P on the inner surface a1 of the housing 1. In other words, the support portions 31 are arranged at an angle relative to the axis Q of the through hole A. The two support portions 31 form an "eight" shape, providing excellent structural support for the stop structure 2.

[0094] When the support structure 3 and the shell 1 have an integrated structure, the through hole A can be formed by stamping. As shown in Figure 12a, the support structure 3 is equivalent to the edge residual structure produced when the through hole A is stamped on the shell 1, and the support structure 3 is arranged around the through hole A. The support structure 3 is covered by the stop structure 2, which is shown in dotted lines. By cutting the shell 1 along the plane where M3-M3 is located in Figure 12a, a schematic diagram of the cross-sectional structure shown in Figure 12b can be obtained. The support structure 3 is inclined from the shell 1 toward the inner surface a1 side, and a bending portion W is formed at the free end of the support structure 3 away from the shell 1. The existence of the bending portion W can further increase the support stability of the support structure 3 to the stop structure 2, thereby ensuring the reliability of the stop structure.

[0095] Specifically, as shown in FIG13 , to facilitate the preparation of the stopper structure 2, the support structure 3 in FIG12a can be "trimmed" so that the support structure 3 is in an "eight-shaped" structure. In this case, the support structure 3 is equivalent to including two support portions 31, and the bent portion W is located at the free end of the support portion 31. Of course, the structure of the support portion 31 may also be implemented in other ways, which will not be illustrated here.

[0096] As shown in Figure 13, two through-holes A are provided on the side 12 of the housing 1, each of which contains a support structure 3. The support structure 3 is exemplified as an "eight-shaped" structure, which can provide more stable support for the stop structure 2 and improve the stability of the stop structure 2 when impacted. Optionally, the support structure 3 may include three, four, or even more support portions 31. These support portions 31 can be evenly distributed around the axis Q of the through-hole A, thereby providing stable support for the stop structure 2 and ensuring its reliability. The shape of the support portions 31 is not limited. In conjunction with the top view of the modular motor 100 shown in Figure 14a, the carrier 20 is obscured by the top 11 of the housing 1 and is not shown. Cutting the modular motor 100 along the plane N1-N1 yields the schematic cross-sectional structure of the modular motor 100 shown in Figure 14b. Further referring to the enlarged view of section C in Figure 14b (Figure 14c), the stop structure 2 protrudes through the through-hole A on the side 12 and protrudes from the inner surface a1 of the side 12. The portion of the stop structure 2 protruding from the inner surface a1 faces the carrier 20 . When the carrier 20 moves, the stop structure 20 can withstand the impact of the carrier 20 during movement, preventing the carrier 20 from directly contacting or colliding with the side portion 12 of the shell 1 .

[0097] Combining the front view of modular motor 100 shown in Figure 15a, cutting modular motor 100 along the plane N2-N2 yields the schematic cross-sectional structure of modular motor 100 shown in Figure 15b. In Figure 15b, carrier 20 is disposed within the cavity enclosed by housing 1. Further referring to the enlarged view of section D in Figure 15b (Figure 15c), housing 1 is provided with a support structure 3 extending into stop structure 2. The support structure 3 is exemplified as a "figure eight" structure. This structure provides more stable support for stop structure 2, enhancing its stability in the event of an impact.

[0098] In some embodiments, as shown in Figures 14b and 15b, a spring 40 is further provided between the carrier 20 and the housing 1. The spring 40 can provide a restoring force for the carrier 20 when the carrier 20 moves. The spring 40 is connected to the side 12 of the housing 1, and the connection is located at the four corners of the side 12. Since the setting position of the stop structure 2 is not restricted and can be set at any position of the housing 1, the spring 40 can correspond to the stop structure 2 along the height direction of the housing 1. That is, when the top 11 is used as a reference, the orthographic projection of the spring 40 on the top 11 and the orthographic projection of the stop structure 2 on the top 11 can overlap. It should be noted that the housing 1 and the base 30 are both fixed parts of the module motor 100. Therefore, the spring 40 can also be provided between the carrier 20 and the fixed base 30.

[0099] Based on the above-mentioned module motor 100 , an embodiment of the present application further provides a camera module 200 , as shown in FIG16 . The camera module 200 includes a lens 50 and the above-mentioned module motor 100 .

[0100] Referring to the top view of camera module 200 shown in Figure 17a, the lens 50 is mounted on the carrier 20 of the module motor 100. Cutting the camera module 200 along the plane N3-N3 yields the cross-sectional structure of the camera module 200 shown in Figure 17b. When the carrier 20 moves relative to the base 30 and the module motor 100, along the height of the module motor 100, the lens 50 also moves with it, achieving focal length adjustment.

[0101] Based on the above-mentioned camera module 200, an embodiment of the present application further provides an electronic device, as shown in FIG18 , which can be a device with a camera function, such as a smart phone or a tablet. The above-mentioned camera module 200 is installed on the body 300 of the electronic device, and an image is acquired through the camera module 200. During the image acquisition process, the focal length of the lens 50 can be adjusted by the module motor 100 to meet the camera requirements. The structures of the camera module 200 and the module motor 100 can refer to the above-mentioned embodiments, and no further exemplary description is given here.

[0102] Based on the structure of the housing 1 in the modular motor 100 described above, an embodiment of the present application further provides a method for preparing the housing 1 in the modular motor 100 described above. The housing 1 has a receiving cavity P. As shown in FIG19 a , the preparation method includes the following steps:

[0103] S1: punching a hole in the shell to form a through hole;

[0104] In combination with the structures of the housing 1 shown in Figures 2b, 2c, and 3a, a through hole can be punched at any desired location of the housing 1. When the structure of the housing 1 is as shown in Figures 3d and 3e, with a top 11 and side portions 12 surrounding the edges of the top 11, a hole can be punched in either the top 11 or the side portions 12.

[0105] S2: A stopper structure extending into the accommodating cavity is formed by through-hole injection molding.

[0106] The stopper structure 2 can be prepared by in-mold injection molding. When the stopper structure 2 comprises the connecting portion 21 and the first stopper 22 shown in FIG. 4 or FIG. 5 , the through hole A can serve as a gate during the injection molding process. That is, the liquid material for injection molding can enter the inner surface a1 of the housing 1 through the through hole A to form the first stopper. When the stopper structure 2 comprises the connecting portion 21, the first stopper 22, and the second stopper 23 shown in FIG. 7 or FIG. 8 , the second stopper 23 can be directly cast on the outer surface a2, and the first stopper 22 can transport the liquid material through the through hole A to the inner surface a1 for casting and molding.

[0107] Specifically, as shown in FIG19b , step S2 may include the following steps:

[0108] S21: Provide a mold, the mold having an inner cavity; the inner cavity of the mold is adapted to the shape of the stop structure 2.

[0109] S22: placing the housing in the mold so that the through hole is connected to the inner cavity; the through hole A on the housing 1 can be used as a gate or flow channel in the injection molding process.

[0110] S23: injecting liquid material into the inner cavity; wherein the liquid material can be any one of liquid liquid crystal molecular polymer, thermoplastic polyurethane rubber, thermoplastic elastomer, or liquid silicone.

[0111] S24: The liquid material is cooled to form a stopper structure.

[0112] When the modular motor 100 is further provided with the support structure 3 as shown in FIG. 9 a , FIG. 10 a , FIG. 11 and FIG. 12 a , after step S1 and before step S2 , as shown in FIG. 19 c , the preparation method may further include the following steps:

[0113] S3: forming a support structure in the through hole.

[0114] In Figure 9a, the support structure 3 is in the shape of a straight line, with both ends of the support structure 3 fixed to the inner wall of the through hole A, and the support structure 3 passes vertically through the axis Q of the through hole A. In Figure 10a, the support structure 3 includes two support parts 31, and the two support parts 31 are symmetrical about the axis Q of the through hole A. One end of each support part 31 is fixed to the inner wall of the through hole A, and the other end extends into the through hole A. In Figure 11, the two support parts 31 are arranged obliquely relative to the inner wall of the through hole A. In Figure 12a, the support structure 3 is formed on the inner wall of the through hole A and is annular. In combination with Figure 12b and Figure 13, the free end of the support structure 3 can also form a bending portion W.

[0115] It should be understood that the presence of the support structure 3 can improve the structural reliability of the stop structure 2 and maintain the stability of the impact surface when the stop structure 2 is impacted by the moving carrier 20, thereby effectively reducing the impact stress.

[0116] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A modular motor, characterized in that: include: Base, carrier, drive assembly and housing; The shell forms a receiving cavity with an opening, and the base is fixed to one side of the opening of the shell; The carrier and the driving assembly are arranged in the accommodating cavity, and the driving assembly is connected between the carrier and the base, and the driving assembly is used to drive the carrier to move relative to the base in a direction perpendicular to the base; the shell is provided with a through hole and a stop structure, and the stop structure includes a connecting portion and a first stop portion, and the connecting portion and the first stop portion are an injection-molded integral structure, the connecting portion is embedded in the through hole, and the first stop portion extends into the accommodating cavity to bear the impact of the carrier; the hardness of the stop structure is greater than or equal to 20 Shore hardness.

2. The modular motor according to claim 1, wherein: The orthographic projection of the first stopping portion on the housing covers the through hole.

3. The modular motor according to claim 2, wherein: Along a direction perpendicular to the axis of the through hole, a distance between an edge of the first stopping portion and an edge of the through hole is greater than or equal to a maximum radial dimension of the through hole.

4. The modular motor according to claim 3, wherein: Along a direction perpendicular to the axis of the through hole, a distance between an edge of the first stop portion and an edge of the through hole is at least twice the maximum radial dimension of the through hole.

5. The modular motor according to any one of claims 1 to 4, characterized in that: The stop structure further includes a second stop portion, the second stop portion and the connecting portion are injection-molded integral structure stops, the second stop portion extends out of the shell, and the second stop portion is used to bear external impact.

6. The modular motor according to claim 5, wherein: The orthographic projection of the second stopping portion on the housing covers the through hole.

7. The modular motor according to any one of claims 1 to 6, characterized in that: The housing is further provided with a supporting structure, and the supporting structure extends into the stopping structure.

8. The modular motor according to claim 7, wherein: Two ends of the support structure are fixed to the inner wall of the through hole, and the support structure passes vertically through the axis of the through hole.

9. The modular motor according to claim 8, wherein: The support structure includes two support parts, the two support parts are respectively fixed on the inner wall of the through hole, and the two support parts are symmetrical about the axis of the through hole.

10. The modular motor according to claim 9, wherein: One end of each support portion is fixed to the inner wall, and the other end extends toward the accommodating cavity.

11. The modular motor according to claim 9 or 10, wherein: A bending portion is formed at the free end of each supporting portion.

12. The modular motor according to any one of claims 1 to 11, wherein: The housing includes a top and a side portion, wherein the side portion is arranged around the edge of the top to form the accommodating cavity; The stop structure is located at the top; and / or, the stop structure is located at the side.

13. The modular motor according to claim 12, wherein: The stop structure is arranged on the side portion, and the height of the stop structure extending into the accommodating cavity is 0.1-0.5 mm.

14. The modular motor according to claim 12 or 13, wherein: The stop structure is arranged on the top, and the height of the stop structure extending into the accommodating cavity is 0.1-0.5 mm.

15. The modular motor according to any one of claims 1 to 14, characterized in that: The material of the stop structure includes any one of liquid crystal molecular polymer, thermoplastic polyurethane rubber, and thermoplastic elastomer.

16. The modular motor according to any one of claims 1 to 15, characterized in that: The material of the shell includes stainless steel and liquid crystal polymer; the material of the shell is stainless steel or liquid crystal polymer.

17. The modular motor according to any one of claims 1 to 16, wherein: The driving assembly includes a driving magnet and a driving coil. The driving magnet is fixed to the bottom of the carrier, and the driving coil is fixed to the base. The driving coil corresponds to the driving magnet.

18. The modular motor according to claim 17, wherein: An elastic structure is provided between the module motor and the carrier; Along the moving direction of the carrier, the stop structure and the elastic structure are located correspondingly.

19. A camera module, characterized in that: A lens and a module motor as described in any one of claims 1-18; the lens is fixed to the carrier.

20. An electronic device, characterized in that: It includes a device body and a camera module installed on the device body, and the camera module is the camera module as described in claim 19.

21. A method for preparing a shell, characterized in that: Used to prepare the housing of the modular motor according to any one of claims 1 to 18, wherein the housing has a receiving cavity; comprising: punching a hole in the shell to form a through hole, wherein the through hole passes through the shell; A stop structure extending into the accommodating cavity of the shell is formed by the through hole.

22. The preparation method according to claim 21, wherein After punching a hole in the shell to form a through hole and before forming a stopper structure extending into the accommodating cavity of the shell through the through hole, the method further includes: A support structure is formed in the through hole.

23. The preparation method according to claim 21 or 22, characterized in that: The stop structure formed by the through hole and extending into the accommodating cavity of the shell includes: Providing a mold, wherein the mold has an inner cavity; placing the housing in the mold so that the through hole communicates with the inner cavity; injecting liquid material into the inner cavity; The liquid material is cooled to form the stopping structure.

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