Module motor, camera module, electronic equipment and casing preparation method

Abstract

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 shell. The module motor includes a base, a carrier, a drive assembly and a shell; the shell forms a receiving cavity with an opening; the carrier and the drive assembly are arranged in the receiving cavity, and the drive assembly is connected between the carrier and the base, and the drive assembly is used to drive the carrier to move relative to the base in a direction perpendicular to the base; the shell is also provided with a stop structure, the stop structure includes a connecting part and a first stop part, the connecting part and the first stop part are an injection-molded integrated structure, the connecting part is embedded in the through hole, and the first stop part extends into the receiving cavity to receive the impact of the carrier; the hardness of the stop structure is greater than or equal to 20 Shore hardness. The stop structure can be formed by through-hole injection molding, and can be implemented at any position of the shell to prevent the carrier from colliding with the shell; and the stop structure occupies a small space, which is conducive to the miniaturization of the device.

Description

Technical Field

[0001] 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

[0002] In recent years, the camera function has become an important parameter for consumers to consider the performance of portable electronic devices. Generally, the camera module motor is used to achieve the focus function of the camera module. The camera module motor has a fixed part and a moving part. The fixed part is fixed to the housing of the electronic device, and the moving part is connected to the optical device. The moving part can move back and forth along a set direction relative to the fixed part, thereby driving the optical device to move, thereby achieving the camera focus function.

[0003] In order to protect the optical device, a stopper wall is arranged inside the housing of the electronic device. The current stopper wall is relatively large in size and requires a certain layout space, which is not conducive to miniaturization of the electronic device. Summary of the invention

[0004] 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.

[0005] In the first aspect, the present application provides a module motor, which can be applied to a device with a camera function. 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. Among them, the drive assembly has a fixed part and a movable part, the fixed part is fixed to the base, 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 runs through the inner surface and the outer surface. The stop structure includes a connecting portion and a first stop portion, wherein the connecting portion and the first stop portion are of an injection-molded integrated structure, 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, and the first stop portion can be used to bear the impact of the carrier. Among them, the hardness of the stop structure can reach a Shore hardness greater than or equal to 20. When the carrier moves and impacts the first stop portion, the first stop portion can maintain a relatively stable structural form and will not be greatly deformed, thereby achieving a good anti-impact effect. 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 impacting 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 devices; and the stop structure occupies a small space, which is conducive to the miniaturization of the device.

[0006] The orthographic projection of the first stopper on the housing can cover the through hole. The first stopper is used to bear the impact of the carrier, and its larger coverage area can provide better impact protection.

[0007] 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 0.4mm, and the distance between the edge of the first stop portion and the axis of the through hole is 1mm-2mm.

[0008] In one possible implementation, the stop structure further includes a second stop portion, the second stop portion and the connecting portion are an injection-molded integral structure, and the second stop portion protrudes from the outer surface, that is, the second stop portion extends out of the shell. The first stop portion and the second stop portion are connected by the connecting portion, and the second stop portion can bear the structural impact of the outside of the shell, and can also increase the structural stability of the stop structure. The orthographic projection of the second stop portion on the shell can also cover the through hole.

[0009] In order to improve the structural stability of the stop structure, the shell is further provided with a supporting structure, and the supporting structure extends into the stop structure.

[0010] In one possible implementation, the support structure is in a straight line shape, with both ends of the stop structure fixed to the inner wall of the through hole, and the support structure vertically passes through the axis of the through hole.

[0011] In another possible implementation, the support structure includes two support parts, the two support parts are respectively fixed to the inner wall of the through hole, and the two support parts are symmetrical about the axis of the through hole. Possibly, each support part is arranged obliquely relative to the axis of the through hole, that is, one end of the support part is fixed to the inner wall of the through hole, and the other end extends toward the accommodating cavity. In addition, a bending part can be formed at the free end of each support part to further increase the stable support of the support structure to the stop structure.

[0012] 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 also be set on the side, and a stop structure can also be set on both the top and the side.

[0013] When the stopper structure is arranged on the side, the height of the stopper structure extending into the housing cavity of the housing is 0.1-0.5 mm. When the stopper structure is arranged on the top, the height of the stopper structure extending into the housing cavity of the housing is 0.1-0.5 mm.

[0014] The material of the stopper structure includes any one of liquid crystal polymer (LCP), thermoplastic polyurethane rubber, thermoplastic elastomer, silicone, and foam. The material of the shell includes any one of stainless steel and liquid crystal polymer.

[0015] When the module motor is a voice coil motor (VCM), 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, and electromagnetic induction can be achieved between the two. When the driving coil is energized, the current in the driving coil generates an electric field, and the driving magnet in the electric field moves due to the principle of electromagnetic induction, thereby driving the carrier to move.

[0016] Possibly, an elastic structure is provided between the module motor and the carrier, and the elastic structure may be a spring sheet. Along the height direction of the carrier, the stop structure corresponds to the elastic structure position. In other words, the stop structure may not interfere with the elastic structure.

[0017] In a second aspect, the present invention provides a camera module, including 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 focusing of the camera module can be achieved.

[0018] In a third aspect, the present invention provides an electronic device, such as a smart phone or a tablet computer with 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.

[0019] In a fourth aspect, the present invention provides a method for preparing a housing, which is used to prepare a housing in any of the above-mentioned modular motors, wherein the housing has a receiving cavity. The preparation method comprises the following steps:

[0020] Punching a hole on the shell to form a through hole; the through hole can penetrate the inner surface and the outer surface of the shell;

[0021] A stop structure extending into the receiving chamber of the housing in the form of a through hole.

[0022] In a possible implementation, after drilling a hole on the module motor to form a through hole and before forming a stopper structure extending into the accommodating cavity of the shell through the through hole, the following steps are also included:

[0023] A support structure is formed within the through hole.

[0024] Wherein, forming a stopper structure extending into the accommodating cavity of the shell through the through hole comprises the following steps:

[0025] Providing a mold, the mold having an inner cavity;

[0026] Placing the housing in the mold so that the through hole is connected to the inner cavity;

[0027] injecting liquid material into the inner cavity;

[0028] The liquid material cools to form a stopper structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1a It is a schematic diagram of the cross-sectional structure of a camera module motor in the main view state in the prior art;

[0030] Figure 1b It is a schematic diagram of the cross-sectional structure of a camera module motor in the prior art when viewed from above;

[0031] Figure 2a A schematic diagram of the structure of a module motor provided in an embodiment of the present application;

[0032] Figure 2b A schematic diagram of the structure of a housing in a module motor provided in an embodiment of the present application;

[0033] Figure 2c A schematic diagram of the structure of a housing in a module motor provided in an embodiment of the present application;

[0034] Figure 3a A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0035] Figure 3b A schematic diagram of the structure of a through hole on a housing in a module motor provided in an embodiment of the present application;

[0036] Figure 3c A schematic diagram of the structure of a through hole on a housing in a module motor provided in an embodiment of the present application;

[0037] Figure 3d A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0038] Figure 3e A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0039] Figure 4 A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0040] Figure 5 A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0041] Figure 6 A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0042] Figure 7 A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0043] Figure 8 A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0044] Figure 9a A schematic diagram of the structure of a housing in a module motor provided in an embodiment of the present application;

[0045] Figure 9b for Figure 9a Schematic diagram of the cross-sectional structure of the plane where M1-M1 is located;

[0046] Fig.10a A schematic diagram of the structure of a housing in a module motor provided in an embodiment of the present application;

[0047] Fig.10b for Fig.10a A schematic diagram of the cross-sectional structure of the plane where M2-M2 is located;

[0048] Fig.11 A schematic cross-sectional structure diagram of a housing in a module motor provided in an embodiment of the present application;

[0049] Fig.12a A schematic diagram of the structure of a housing in a module motor provided in an embodiment of the present application;

[0050] Figure 12b for Fig.12a A schematic diagram of the cross-sectional structure of the plane where M3-M3 is located;

[0051] Fig.13 A schematic diagram of the structure of a housing in a module motor provided in an embodiment of the present application;

[0052] Fig.14a A top view of a module motor provided in an embodiment of the present application;

[0053] Fig.14b for Fig.14a Schematic diagram of the cross-sectional structure of the plane where N1-N1 is located;

[0054] Fig.14c for Fig.14b Enlarged view of the middle C part;

[0055] Fig.15a A front view of a module motor provided in an embodiment of the present application;

[0056] Fig.15b for Fig.15a Schematic diagram of the cross-sectional structure of the plane where N2-N2 is located;

[0057] Fig.15c for Fig.15b Enlarged view of the middle D part;

[0058] Fig.16 A schematic diagram of the structure of a camera module provided in an embodiment of the present application;

[0059] Fig.17a A top view of a camera module provided in an embodiment of the present application;

[0060] Fig.17b for Fig.17a A schematic diagram of the cross-sectional structure of the plane where N3-N3 is located;

[0061] Fig.18A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0062] Fig.19a A schematic diagram of a process for preparing a shell provided in an embodiment of the present application;

[0063] Fig.19b A schematic diagram of a process for preparing a shell provided in an embodiment of the present application;

[0064] Fig.19c A schematic diagram of a process for preparing a shell provided in an embodiment of the present application. DETAILED DESCRIPTION

[0065] The camera function is an important parameter to measure 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, such as Figure 1a and Figure 1b As shown, the fixed part is, for example, the base 11' of the camera module motor and the side wall 12' fixed to the base 11', and the movable part is, for example, 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 the like. In this process, in order to prevent the movable part from colliding with the fixed part and being damaged, a stop wall 2' is generally provided on the side of the fixed part facing the movable part. Figure 1a The cross-sectional structure of the camera module motor in the front view is shown. 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 The cross-sectional structure of the camera module motor in a top-down state is shown. The setting of the stop wall 2' needs to avoid other devices. Here, the spring 4' is used as an example. In order to avoid interference with the spring 4', the stop wall 2' cannot be set at the corner of the camera module. There are many limitations in design and manufacturing. It can be seen that the stop anti-collision structure in the prior art is not conducive to the miniaturization of electronic equipment.

[0066] Therefore, the embodiments of the present application provide a method for preparing a module motor, a camera module, an electronic device, and a housing. When the module motor is used in a device having a fixed part and a movable part, it can withstand impacts through a smaller stopper structure to achieve the purpose of impact protection, and the stopper structure is not restricted by other device structures, which is conducive to miniaturization of the device.

[0067] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.

[0068] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0069] like Figure 2a As shown, the 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. Figure 2a As shown, the module motor 100 includes a base 30, a carrier 20, a drive assembly and the above-mentioned shell 1, wherein the drive assembly is not shown. The shell 1 is fixed to the base 30, and the shell 1 and the base 30 can be used as a fixing part. 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. Figure 2a In the figure, the direction perpendicular to the base 30 is the Z direction, which can also be regarded as the height direction of the shell 1.

[0070] When the module motor 100 is a voice coil motor, the driving assembly may specifically include a driving magnet and a driving coil. The driving magnet may be fixed to the bottom of the carrier 20, and the driving coil may be arranged on the base 30, and the driving coil corresponds 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 may be generated, and the driving magnet in the magnetic field may be driven; when the driving coil is energized, the driving magnet in the electromagnetic field may be moved by the force; in a 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 may drive the carrier 20 to move in a set direction. It should be understood that, according to different usage requirements, the voice coil motor may specifically be an open loop, a closed loop, an optical image stabilizer (OIS), etc., which is not limited here.

[0071] The housing 1 specifically includes a top 11 and a side 12, wherein the top 11 is exemplified as a rectangle, and the side 12 is arranged around the edge of the top 11, so that a space capable of accommodating a carrier 20 and a driving 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 the extension of optical devices such as lenses from 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 exemplified as a circle.

[0072] Combination Figure 2b and Figure 2c As shown, a receiving cavity P with an opening can be formed between the side portion 12 and the top portion 11, and the receiving cavity P can be used to accommodate the above-mentioned carrier 20 and the driving assembly. The opening of the receiving cavity P refers to the side of the housing 1 used to connect the base 30. The housing 1 is provided with a stopper structure 2 that penetrates the housing 1, and the stopper structure 2 can extend into the receiving cavity P of the housing 1, so that the stopper structure 2 can bear the impact of the carrier 20, disperse the impact stress, and prevent 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 loaded on the carrier 20.

[0073] Reference Figure 3a As shown, Figure 3a As shown, the housing 1 has an inner surface a1 and an outer surface a2. Here, the division of the inner surface a1 and the outer surface a2 of the housing 1 is a relative concept. Generally, it can be considered that the surface of the housing 1 facing the accommodating cavity P is called the inner surface a1, and the surface of the housing 1 facing away from the accommodating cavity P is called the outer surface a2.

[0074] 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, and 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, and 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.

[0075] The shape of the through hole A is not limited. Figure 3b As shown, the cross section of the through hole A perpendicular to the axis Q can be a rectangle. Figure 3c As shown, the cross-section of the through hole A is circular and perpendicular to the axis Q. Generally, the through hole A is formed into a relatively regular shape to facilitate injection molding of the stop structure 2 .

[0076] like Figure 3d and Figure 3e As shown, the housing 1 has a top 11 and a side 12 surrounding the edge of the top 11. Exemplarily, the top 11 is parallel to the plane where the X direction and the Y direction are located. The side 12 is perpendicular to the top 11, that is, the side 12 is perpendicular to the X direction and the Y direction, and the side 12 extends along the Z direction. The X direction and the Y direction can be regarded as the radial direction of the housing 1, and the Z direction can be regarded as the height direction of the housing 1. With the module motor 100 as a reference, the carrier 20 can move relative to the top 11 along the height direction of the housing 1.

[0077] The stop structure 2 can be as follows Figure 3d As shown, the stopper structure 2 is arranged on the side portion 12, protruding from the inner surface a1 of the side portion 12. Along the extension direction of the axis Q of the through hole A, the height of the stopper structure 2 protruding from the inner surface a1 of the side portion 12 is d1, and d1 here can be 0.1-0.5mm, for example, 0.25mm. This can also reduce the size of the stopper structure 2 in the radial direction of the housing 1, reduce the space occupied by the stopper structure 2, and further reduce the space occupied by the module motor 100. Compared with the larger thickness of the stopper wall in the prior art, the benefit of size reduction can be obtained in the radial direction of the module motor 100.

[0078] The stop structure 2 can also be as Figure 3eAs shown, the stopper structure 2 is arranged on the top 11, and protrudes from the inner surface a1 of the top 11. Along the extension direction of the axis Q of the through hole A, the height of the stopper structure 2 protruding from the inner surface a1 of the side portion 12 is d2, and d2 here can be 0.1-0.5mm, for example, 0.2mm. This can reduce the size of the stopper structure 2 in the height direction of the housing 1, reduce the space occupied by the stopper structure 2, and further reduce the space occupied by the module motor 100. In the height direction of the module motor 100, the benefit of size reduction can also be obtained.

[0079] Of course, in a specific implementation, the stop structure 2 can be as follows Figure 3d As shown, it is only arranged on the side 12 of the housing 1, and can also be arranged as shown in FIG. Figure 3e As shown, the stopper structure 2 is only provided on the top 11 of the housing 1, but the stopper structure 2 can also be provided on both the side 12 and the top 11. In addition, the number and specific position of the stopper structure 2 are not limited.

[0080] 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 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 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 obtaining the stop structure 2 by injection molding 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.

[0081] like Figure 4 As shown, the stopper structure 2 specifically includes a connecting portion 21 and a first stopper 22, and the connecting portion 21 and the first stopper 22 are injection molded integrated structures. The connecting portion 21 is embedded in the through hole A, and the first stopper 22 protrudes from the inner surface a1 of the housing 1. With the inner surface a1 as the boundary and the accommodating cavity P of the housing 1 as a reference, it can be considered that the first stopper 22 is located in the accommodating cavity P. The shape of the connecting portion 21 is adapted to the shape of the through hole A, and the injection molded connecting portion 21 can be tightly combined with the through hole A, and the housing 1 provides stable support for the first stopper 22.

[0082] In the embodiment of the present application, the purpose of setting the stop structure 2 is to prevent the device structure in the housing 1 from directly colliding with the inner surface a1 of the housing 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 one side of the inner surface a1 of the shell 1 hits the first stopper 22 of the stopper structure 2 , the first stopper 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 .

[0083] 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.

[0084] The stop structure 2 is made of a stop material with a relatively high hardness, and the size of the first stop portion 22 in the stop structure 2 can be made large enough to achieve a good stop effect. The size of the first stop portion 22 here refers to the size of the first stop portion 22 perpendicular to the axis Q of the through hole A. Figure 5As shown, with the inner surface a1 provided with the stop structure 2 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 dimension 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 stopper 22 perpendicular to the axis Q of the through hole A is B2. Perpendicular to the axis Q of the through hole A, the minimum radial dimension B2 of the first stopper 22 is greater than the maximum radial dimension of the through hole A, so that the first stopper 22 can cover the through hole A. In other words, a first stopper 22 with a larger size can be obtained by injection molding a through hole A with a smaller size, and the first stopper 22 with a larger size can provide a larger impact surface, thereby achieving a good anti-impact effect. The orthographic projection of the first stopper 22 on the inner surface a1 covers the through hole A, the connecting portion 21 is matched 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 .

[0085] like Figure 6 As shown, along the direction perpendicular to the axis Q of the through hole A, the distance between the edge of the orthogonal projection of the first stopper 22 on the inner surface a1 and the edge of the through hole A is S. The distance S is at least greater than or equal to the diameter of the through hole A. In some embodiments, the distance S is greater than or equal to twice the diameter of the through hole A. For example, the maximum radial dimension of the through hole A is 0.4 mm, and the distance between the edge of the orthogonal projection of the first stopper 22 on the inner surface a1 and the edge of the through hole A is 1-2 mm. It should be understood that along the direction perpendicular to the axis Q of the through hole A, the distance between the edge of the first stopper 22 and the edge of the through hole A is also the distance between the edge of the orthogonal projection of the first stopper 22 on the inner surface a1 and the edge of the connector 21. In addition, the inner surface a1 in the orthogonal projection of the first stopper 22 on the inner surface a1 refers to the portion that the first stopper 22 contacts. Therefore, in the embodiment of the present application, a first stopper 22 of a larger size can be obtained by injection molding a through hole A of a smaller size, so as to meet the anti-impact requirements of the equipment and components.

[0086] In some embodiments, Figure 7As shown, the stopper structure 2 also includes a second stopper 23, and the second stopper 23 and the connecting member 21 are also an injection-molded integral structure, that is, the connecting member 21, the first stopper 22 and the second stopper 23 of the stopper structure 2 are all injection-molded integral structures obtained by injection molding. Along the extension direction of the axis Q of the through hole A, the second stopper 23, the connecting member 21 and the first stopper 22 are arranged in sequence. The second stopper 23 protrudes from the outer surface a2 of the shell 1, that is, the second stopper 23 extends outward from the outer side of the shell 1 in a direction away from the cavity of the shell 1. When the inner surface a1 side of the shell 1 is provided with a carrier 20 and other movable parts, and the outer surface a2 side is also provided with movable parts, the first stopper 22 can provide an anti-collision function for the carrier 20 and other movable parts on the inner surface a1 side, and the second stopper 23 can provide an anti-collision function for the movable parts on the outer surface a2 side.

[0087] Possibly, if Figure 8 As shown, the size of the second stopper 23 can also be made large enough. The size of the second stopper 23 here refers to the size of the first stopper 22 perpendicular to the axis Q of the through hole A. With the outer surface a2 provided with the stopper structure 2 as a reference, the orthographic projection of the outer surface a2 of the second stopper 23 covers the through hole A. The first stopper 22 with a larger size can provide a larger impact surface, thereby achieving a good anti-impact effect. The connecting portion 21 is adapted to the through hole A, and the orthographic projection of the second stopper 23 on the outer surface a2 also covers the connecting portion 21.

[0088] 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 housing 1, and the support structure 3 can be fixed to the housing 1 and extend into the stop structure 2. Figure 9a As shown, taking the through hole A on the shell 1 as a square hole as an example, a support structure 3 is arranged 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 in the shape of an "I-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 line Q of the through hole A, and 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 be extended into the stop structure 2. Along Figure 9a When the plane M1-M1 is cut into the shell 1, we can get Figure 9b The cross-sectional structure diagram is shown in FIG. Figure 9b In the embodiment, the stop structure 2 covers the support structure 3, and the support structure 3 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. It should be understood that the support structure 3 can be an integrated structure with the housing 1.

[0089] In one embodiment, Fig.10a As shown, 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 are rotated 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. Fig.10a When the plane M2-M2 is cut into the shell 1, we can get Fig.10b The cross-sectional structure diagram is shown in FIG. Fig.10b In the embodiment, the stop structure 2 covers the support structure 3, and the support structure 3 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. It should be understood that the two support parts 31 can be an integrated structure with the housing 1.

[0090] In order to improve the stable support of the support structure 3 to the stop structure 2, as Fig.11 As shown, the two support portions 31 can be set to be inclined. One end of each support portion 31 is fixed to the inner wall of the through hole A, and the other end extends to the accommodating cavity P on the inner surface a1 side of the shell 1. That is, the support portion 31 is inclined relative to the axis Q of the through hole A. The two support portions 31 are in an "eight-shaped" shape, which can provide good structural support for the stop structure 2.

[0091] When the support structure 3 and the housing 1 have an integrated structure, the through hole A can be formed by stamping. Fig.12a As shown, the support structure 3 is equivalent to the edge residual structure generated when the through hole A is punched on the housing 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 by the dotted line. Fig.12a When the plane M3-M3 is cut into the shell 1, we can get Figure 12b The support structure 3 is inclined from the shell 1 to the inner surface a1, 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, ensuring the reliability of the stop structure.

[0092] Specifically, Fig.13 As shown, in order to facilitate the preparation of the stop structure 2, Fig.12a The support structure 3 in the embodiment is “trimmed” so that the support structure 3 is in an “eight-shaped” structure. At this time, the support structure 3 is equivalent to including two support portions 31, and the bending portion W is located at the free end of the support portion 31. Of course, the structure of the support portion 31 may also have other implementation methods, which will not be described here.

[0093] like Fig.13 As shown, two through holes A are provided on the side 12 of the shell 1, and a support structure 3 is provided in each through hole A. The support structure 3 is exemplified as an "eight-shaped" structure, and the support structure 3 can provide more stable support for the stop structure 2, thereby improving the stability of the stop structure 2 when it is impacted. Possibly, the support structure 3 may also include three, four or even more support portions 31. These support portions 31 may be evenly distributed around the axial center line Q of the through hole A, thereby providing stable support for the stop structure 2 and ensuring the reliability of the stop structure 2. The shape of the support portion 31 is not limited. Fig.14a The top view of the module motor 100 is shown, and the carrier 20 is blocked by the top 11 of the housing 1 and is not shown. The module motor 100 is cut along the plane N1-N1, and the Fig.14b The cross-sectional structure diagram of the module motor 100 is shown. Fig.14b Enlarged view of the middle C part Fig.14c The stopper structure 2 passes through the through hole A on the side portion 12 and protrudes from the inner surface a1 of the side portion 12. The portion of the stopper structure 2 protruding from the inner surface a1 faces the carrier 20. When the carrier 20 moves, the stopper structure 20 can bear the impact of the carrier 20 during the movement, preventing the carrier 20 from directly contacting or colliding with the side portion 12 of the housing 1.

[0094] Combination Fig.15a The front view of the module motor 100 is shown, and the module motor 100 is cut along the plane N2-N2 to obtain Fig.15b The cross-sectional structure diagram of the module motor 100 is shown in FIG. Fig.15b In the embodiment, the carrier 20 is disposed in the cavity surrounded by the housing 1. Fig.15b Enlarged view of the middle D part Fig.15c The shell 1 is provided with a support structure 3 extending into the stop structure 2. The support structure 3 is exemplified as an "eight-shaped" structure. The support structure 3 can provide more stable support for the stop structure 2 and improve the stability of the stop structure 2 when it is impacted.

[0095] In some embodiments, in combination Fig.14b and Fig.15bAs shown, a spring 40 is also provided between the carrier 20 and the shell 1, and 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 shell 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 shell 1, the spring 40 can correspond to the stop structure 2 along the height direction of the shell 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 shell 1 and the base 30 are both fixed parts of the module motor 100, so the spring 40 can also be provided between the carrier 20 and the fixed base 30.

[0096] Based on the above module motor 100, the embodiment of the present application further provides a camera module 200, such as Fig.16 As shown, the camera module 200 includes a lens 50 and the above-mentioned module motor 100.

[0097] Combination Fig.17a The top view of the camera module 200 is shown in FIG. 5 , where the lens 50 is mounted on the mounting base 20 of the module motor 100. The camera module 200 is cut along the plane N3-N3 to obtain Fig.17b The cross-sectional structure diagram of the camera module 200 is shown. When the carrier 20 moves relative to the base 30 and the module motor 100 along the height direction of the module motor 100, the lens 50 can also move accordingly to achieve the adjustment of the focal length.

[0098] Based on the above-mentioned camera module 200, the embodiment of the present application further provides an electronic device, such as Fig.18 As shown, the electronic device can be a device with a camera function such as a smart phone or a tablet. The camera module 200 is installed on the body 300 of the electronic device. The camera module 200 is used to acquire images. 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 embodiments, and no further exemplary description is given here.

[0099] Based on the structure of the housing 1 in the module motor 100, the embodiment of the present application further provides a method for preparing the housing 1, which is used to prepare the housing 1 in the module motor 100. The housing 1 has a receiving cavity P. Fig.19a As shown, the preparation method comprises the following steps:

[0100] S1: punching a hole in the shell to form a through hole;

[0101] Combination Figure 2b , Figure 2c as well as Figure 3aThe structure of the housing 1 shown in FIG. 1 can form a through hole by punching a hole at any desired position of the housing 1. Figure 3d and Figure 3e As shown, when there is a top 11 and a side 12 surrounding the edge of the top 11, holes can be punched on the top 11 or the side 12.

[0102] S2: A stopper structure extending into the accommodating cavity is formed by through-hole injection molding.

[0103] The stop structure 2 can be prepared by injection molding. Figure 4 or Figure 5 When the connecting portion 21 and the first stopper 22 are shown, the through hole A can be used as a gate in the injection molding process, that is, the liquid material for injection molding can enter the inner surface a1 side of the housing 1 through the through hole A to form the first stopper. Figure 7 or Figure 8 When the connecting portion 21, the first stop portion 22 and the second stop portion 23 are shown, the second stop portion 23 can be directly cast on the outer surface a2 side, and the first stop portion 22 can transport the liquid material through the through hole A to the inner surface a1 side for casting.

[0104] Specifically, Fig.19b As shown, step S2 may include the following steps:

[0105] 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.

[0106] 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 a flow channel for the injection molding process.

[0107] S23: injecting liquid material into the inner cavity; wherein the liquid material may be any one of liquid liquid crystal molecular polymer, thermoplastic polyurethane rubber, thermoplastic elastomer, or liquid silicone.

[0108] S24: The liquid material is cooled to form a stopper structure.

[0109] When the module motor 100 is also provided with Figure 9a , Fig.10a , Fig.11 and Fig.12a When the support structure 3 is shown, after step S1 and before step S2, as shown in FIG. Fig.19c As shown, the preparation method may further comprise the following steps:

[0110] S3: forming a support structure in the through hole.

[0111] Figure 9a In the figure, the support structure 3 is in a straight line shape, both ends of the support structure 3 are fixed to the inner wall of the through hole A, and the support structure 3 passes through the axis Q of the through hole A vertically. Fig.10a In the embodiment, the support structure 3 includes two support portions 31 , and the two support portions 31 are symmetrical about the axis Q of the through hole A. One end of each support portion 31 is fixed to the inner wall of the through hole A, and the other end extends into the through hole A. Fig.11 In the embodiment, the two supporting parts 31 are arranged obliquely relative to the inner wall of the through hole A. Fig.12a In the embodiment, the support structure 3 is formed on the inner wall of the through hole A and is annular. Figure 12b and Fig.13 The free end of the supporting structure 3 may also form a bent portion W.

[0112] It should be understood that the existence 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.

[0113] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A modular motor, It is 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, the stop structure includes a connecting part and a first stop part, the connecting part and the first stop part are an injection-molded integrated structure, the connecting part is embedded in the through hole, and the first stop part 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, It is characterized in that The orthographic projection of the first stopper on the housing covers the through hole.

3. The modular motor according to claim 2, It is characterized in that Along a direction perpendicular to the axial center line of the through hole, a distance between an edge of the first stop 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, It is characterized in that Along a direction perpendicular to the axial centerline 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 a maximum radial dimension of the through hole.

5. The modular motor according to any one of claims 1 to 4, It is 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, It is characterized in that The orthographic projection of the second stopper on the housing covers the through hole.

7. The modular motor according to any one of claims 1 to 4, It is characterized in that The housing is also provided with a supporting structure, and the supporting structure extends into the stop structure.

8. The modular motor according to claim 7, It is characterized in that Two ends of the support structure are fixed to the inner wall of the through hole, and the support structure vertically passes through the axis of the through hole.

9. The modular motor according to claim 8, It is characterized in that 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, It is characterized in that 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, It is characterized in that 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 4, It is characterized in that The housing comprises a top portion and a side portion, wherein the side portion is arranged around the edge of the top portion 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, It is characterized in that 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, It is characterized in that 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 4, It is 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 4, It is characterized in that The material of the shell includes any one of stainless steel and liquid crystal polymer.

17. The modular motor according to any one of claims 1 to 4, It is characterized in that 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, It is characterized in that 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, It is characterized in that It comprises a lens and a module motor as claimed in claim 17 or 18; the lens is fixed to the carrier.

20. An electronic device, It is 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, It is characterized in that Used to prepare the housing in the module motor according to any one of claims 1 to 16, the housing having a receiving cavity; comprising: Punching a hole on 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, It is characterized in that 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 within the through hole.

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

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