CN114070965A

CN114070965A - Motor, preparation method of elastic polymer layer of motor and camera module

Info

Publication number: CN114070965A
Application number: CN202010770186.4A
Authority: CN
Inventors: 俞丝丝; 赵金军; 刘傅文
Original assignee: Ningbo Sunny Opotech Co Ltd
Current assignee: Ningbo Sunny Opotech Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2022-02-18

Abstract

The application discloses a motor, a preparation method of an elastic polymer layer of the motor and a camera module. The motor is used for driving the lens of the camera module to displace, comprises a movable part and a fixed part, the lens is suitable for being installed on the movable part, the movable part can displace relative to the fixed part, the motor further comprises an elastic high polymer layer formed by an elastic high polymer material, and the elastic high polymer layer is used for avoiding the direct contact between the movable part and the fixed part. The technical scheme of the application solves the problem that the motor is easy to generate scraps when colliding, and also solves the problem that stains are easy to generate in the motor moving process; the motor provided by the application is favorable for improving the assembly yield of the camera module and the client yield of the camera module.

Description

Motor, preparation method of elastic polymer layer of motor and camera module

Technical Field

The application relates to a motor, a preparation method thereof and a camera module.

Background

The motor is an indispensable element for forming the camera module, and in the working process of the camera module, the motor is used for driving the lens to move so as to realize the focusing and anti-shaking functions of the camera module.

The motor generally includes a carrier for carrying a lens, a housing disposed around an outer side of the carrier, a base for fixing the housing, an elastic member for movably supporting the carrier in a space defined by the base and the housing, a magnet disposed on the housing, and a coil disposed on the carrier. The working principle of the motor is as follows: let in appointed electric current in the coil of winding on the carrier, the magnetic field that the coil produced takes place the interact with the magnetite of setting on the shell to the coil drives the carrier and takes place to remove for the shell, and the carrier drives the camera lens and takes place to remove, in order to realize making a video recording focusing and anti-shake of module.

During the movement of the lens driven by the motor, the carrier moves relative to the housing and the base, and when moving, some debris generated by collision may cause the internal stains of the motor to exceed the standard. In addition, during motor reliability testing, collisions and drops are routine tests in which the carrier, housing and base collide to produce debris that may adhere to various components of the motor and interfere with the use of the motor. After assembling the motor in the module of making a video recording, the module of making a video recording also need pass through reliability test, because carrier and camera lens are together fixed this moment, under the adding of camera lens self weight, it is more violent to fall the collision of in-process carrier and shell and base, can be in the inside more piece that produces of motor, and these pieces can be adhered on the lens, influence image quality, cause whole module of making a video recording bad.

In addition, the camera module is in the transportation, and the lens carrier also can be inevitable with shell and base and bump, produces the piece, because this kind of reason often can cause the phenomenon that the module of making a video recording was returned goods because the motor stain exceeds standard at the customer end, brings certain yield loss for the producer to extra cost has been increased.

Disclosure of Invention

An object of the present application is to provide a motor capable of effectively preventing dust to solve a problem that stains are easily generated inside the motor at the time of collision.

Another object of the present application is to provide a method of preparing an elastic polymer layer on a motor part for solving a problem that stains are easily generated inside a motor at the time of collision.

Another aim at of this application provides a module of making a video recording, solves the problem that the yield that causes because the collision drops in reliability testing and the transportation.

In order to achieve the above object, the present application provides a motor for driving the lens of the camera module group shifts, the motor includes movable part and fixed part, the lens is suitable for installing on the movable part, the movable part can be relative the fixed part takes place the displacement, the motor still includes the elasticity polymer layer that is formed by elastic polymer material, elasticity polymer layer covers the movable part and/or at least some surfaces of fixed part, elasticity polymer layer is used for avoiding the movable part with fixed part direct contact.

In some embodiments, the elastic polymer layer is directly molded on the surface of the movable part and/or the fixed part.

In some embodiments, the elastic polymer material has elasticity at normal temperature and does not lose its elasticity below 50 ℃, and preferably the elastic polymer material does not lose its elasticity below 80 ℃.

In some embodiments, the elastic polymer material is rubber, and the elastic polymer material is selected from one of silicone rubber and polyurethane rubber. .

In some embodiments, the elastic polymer layer is made of polyurethane, and the surface of the moving part and/or the fixed part covered by the elastic polymer layer is made of LCP material.

In some embodiments, the movable component includes a lens carrier and a first driving component disposed on the lens carrier, the fixed component includes a housing, a base and a second driving component disposed on the housing, the lens carrier is used for carrying a lens, the housing is disposed around the lens carrier and fixed on the base, and the first driving component and the second driving component cooperate with each other to drive the lens carrier to move in a space defined by the housing and the base.

In some embodiments, the motor further includes an elastic element that movably supports the lens carrier in a space defined by the housing and the base, one of the first driving component and the second driving component is a coil, and the other is a magnet, and the coil and the magnet are disposed opposite to each other.

In some embodiments, the lens carrier includes a carrier body, the elastic polymer layer includes a first elastic polymer layer, the first elastic polymer layer covers at least a part of an outer surface of the carrier body, and the first elastic polymer layer is used for avoiding the carrier body from being in direct contact with the housing and/or the base.

In some embodiments, the carrier body includes an inner surface defining a cavity, a side surface surrounding the inner surface, an upper end surface connecting the inner surface and an upper end of the side surface, and a lower end surface connecting the inner surface and a lower end of the side surface, the cavity is adapted to mount a lens of a camera module, and the first elastic polymer layer covers at least one of the side surface, the upper end surface, and the lower end surface of the carrier body.

In some embodiments, the first elastic polymer layer includes a plurality of first buffer portions, each of the first buffer portions is independently distributed on the surface of the carrier body, and a height of the first buffer portion protruding outward in each direction exceeds a maximum height of the carrier body in the direction.

In some embodiments, the surface of the carrier body includes a base portion and a protruding structure protruding from the base portion, the protruding structure includes a first outer end facing outward and a first outer wall connecting the first outer end and the base portion, the first elastic polymer layer includes a plurality of first buffer portions, the first buffer portions are disposed on the first outer end, or the first buffer portions cover the first outer end and the first outer wall, or the first outer end has a groove, the first buffer portions are disposed in the groove, the outer end of the first buffer portions protrudes from an opening of the groove, or the first buffer portions are disposed around the protruding structure, and a height of the first buffer portions protruding outward exceeds a height of the protruding structure.

In some embodiments, the protrusion structure is a winding post, the first driving component is a coil, the second driving component is a magnet, and the coil is wound on the winding post.

In some embodiments, the mount includes a mount body, and the elastic polymer layer includes a second elastic polymer layer covering at least a part of an outer surface of the mount body, the second elastic polymer layer being for preventing the lens carrier from being in direct contact with the mount body.

In some embodiments, the second elastic polymer layer covers an entire outer surface of the mount opposite to the lens carrier.

In some embodiments, the base body is provided with a limiting boss for limiting, the limiting boss protrudes in the direction of the lens carrier and is used for limiting the displacement of the lens carrier in the direction of the base, the second elastic polymer layer includes a plurality of second buffer portions, the second buffer portions are arranged on the limiting boss, or the second buffer portions are arranged around the limiting boss, and the height of the outward protrusion of the second buffer portions exceeds the height of the protrusion of the limiting boss.

In some embodiments, the second buffer portion covers the entire surface of the position-restricting boss; or the second buffer part covers the end face, facing the lens carrier, of the limiting boss; or, a groove is formed in the end face of the limiting boss facing the direction of the lens carrier, the second buffering part is arranged in the groove, and the outer end of the second buffering part protrudes out of the opening of the groove.

The application provides a preparation method of the elastic macromolecule layer, which comprises the following steps:

s1, injecting a preset amount of second raw material for forming the base layer into the injection mould;

s2, injecting a predetermined amount of the first material for forming the elastic polymer layer onto the second material at a predetermined position of the injection mold 6;

s3, curing the first material and the second material to form the elastic polymer layer on the base layer.

In some embodiments, before the step S1, a step S0 is further included, where a metal reinforcement is placed in the injection mold.

The application also provides a camera module, which comprises the motor.

Compared with the prior art, the beneficial effect of this application lies in: the problem that the motor is easy to generate scraps when in collision is solved, and the problem that stains are easy to generate in the motor moving process is also solved; the motor provided by the application is favorable for improving the assembly yield of the camera module and the client yield of the camera module.

Drawings

FIG. 1 is an exploded schematic view of one embodiment of the motor of the present application;

FIG. 2 is a schematic view of one embodiment of a lens carrier of the present application;

FIG. 3 is a schematic view of one embodiment of a lens carrier of the present application;

FIG. 4 is a schematic view of another embodiment of a lens carrier of the present application;

FIG. 5 is a schematic view of one embodiment of a first buffer of the present application;

FIG. 6 is a schematic view of another embodiment of a first cushioning portion of the present application;

FIG. 7 is a schematic view of yet another embodiment of a first cushioning portion of the present application;

FIG. 8 is a schematic view of another embodiment of a lens carrier of the present application;

FIG. 9 is a schematic view of one embodiment of a base of the present application;

FIG. 10 is a schematic view of an embodiment of a second buffer of the present application;

FIG. 11 is a schematic view of another embodiment of a second buffer of the present application;

FIG. 12 is a schematic view of yet another embodiment of a second buffer of the present application;

FIG. 13 is a schematic view of yet another embodiment of a second cushioning portion of the present application;

fig. 14A, 14B, and 14C show an example of a method for producing an elastic polymer layer according to the present application;

in the figure: 1. a lens carrier; 11. a carrier body; 110. a cavity; 111. an inner surface; 112. a side surface; 1122. a base portion; 113. an upper end surface; 114. a lower end face; 115. a raised structure; 1151. a first outer end; 1152. a first outer wall; 1153. a groove; 115A, a winding post; 13. a metal reinforcement; 2. a housing; 3. a base; 31. a base body; 311. a limiting boss; 41. a magnet; 42. a coil; 5. an elastic element; 51. an upper spring; 52. a lower spring; 6. injection molding a mold; 7. a first feedstock; 8. a second raw material; 911. a first buffer section; 921. a second buffer portion.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The application provides a motor suitable for module of making a video recording, the motor is used for driving the camera lens of the module of making a video recording and carries out the displacement. The motor comprises a moving part and a fixed part, the lens of the camera module is suitable for being mounted on the moving part, when the motor works, the moving part displaces relative to the fixed part, in order to avoid that debris generated when the moving part collides with the fixed part influences the imaging effect of the camera module, the motor further comprises an elastic polymer layer formed by an elastic polymer material, the elastic polymer layer covers at least one part of the surface of the moving part and/or the fixed part (the surface of the moving part and/or the fixed part covered by the elastic polymer layer is called as a base layer below), the elastic polymer layer is used for avoiding the direct contact between the moving part and the fixed part, namely when the moving part collides with the fixed part, the elastic polymer layer is positioned between the collision parts of the moving part and the fixed part, playing a role of buffering.

The elastic polymer layer has certain elasticity at normal temperature, namely, the elastic polymer layer is suitable for generating elastic deformation when colliding with a hard material and restoring to an original state after external force disappears. It will be appreciated by those skilled in the art that the elastomeric polymer layer is typically a cross-linked polymer material that does not itself generate substantially debris upon impact.

The elastic polymer layer is required to have good thermal stability, for example, the elastic polymer layer does not lose its elasticity at 50 ℃ or lower, and preferably the elastic polymer layer does not lose its elasticity at 80 ℃ or lower. The material of the elastic polymer layer can be various silicon rubber, polyurethane rubber and the like.

The elastic polymer layer may be bonded to the base layer with an adhesive. However, the process of adhering the elastic polymer layer with the adhesive is complicated, and the elastic polymer layer needs to be formed into a preset shape, then the adhesive is applied to the corresponding position of the base layer, and finally the elastic polymer layer is adhered to the adhesive. In addition to the complex process, the elastic polymer layer is easy to fall off in this way, which affects the service life of the camera module.

Based on this applicant provides a solution: the elastic macromolecule layer is directly molded on the surface of the movable part and/or the fixed part. This solution can be achieved by: the elastic high polymer layer is formed by molding the movable part and the fixed part, and then arranging a first raw material at the position where the elastic high polymer layer is required to be arranged on the movable part and/or the fixed part, wherein the elastic high polymer layer is formed after the first raw material is cured. The aforementioned solution can also be achieved by: and arranging a second raw material in the mold, then arranging a first raw material at a preset position of the second raw material, synchronously curing and molding the first raw material and the second raw material in the mold, forming the movable part or the fixed part after the second raw material is cured, and forming the elastic high polymer layer after the first raw material is cured. It will be appreciated that the first starting material may be a prepolymer used to form the elastomeric polymer layer, which has a certain flowability that enables injection moulding. The curing method of the first material may be low-temperature curing, normal-temperature curing, heat curing, or other methods such as photo-curing. The selection of the first raw material and the curing method thereof are not limited in the present application.

The elastic polymer layer has a certain viscosity, so that the elastic polymer layer can be firmly attached to the base layer after the first raw material is cured. Preferably, the material of the elastic polymer layer has better compatibility with the material of the base layer, which is beneficial to improving the adhesive force of the elastic polymer layer on the base layer. In a specific embodiment, the base material is an LCP material, the elastic polymer layer is made of polyurethane, and the LCP material is a commonly used material for manufacturing a motor component, and the applicant has repeatedly screened and found that the requirement of the elastic polymer layer on elasticity, thermal stability, compatibility with the base material, and the like can be well satisfied by using the polyurethane material.

As shown in fig. 1, the movable component includes a lens carrier 1 and a first driving assembly 42 disposed on the lens carrier 1, the fixed component includes a housing 2, a base 3 and a second driving assembly 41 disposed on the housing 2, the lens carrier 1 is used for carrying a lens (not shown in the figure), the housing 2 is disposed around the lens carrier 1 and fixed on the base 3, and the first driving assembly 42 and the second driving assembly 41 cooperate with each other to drive the lens carrier 1 to move in a space defined by the housing 2 and the base 3.

In some embodiments, the motor further comprises a resilient element 5, the resilient element 5 movably supporting the lens carrier 1 in a space defined by the housing 2 and the base 3. Specifically, the elastic member 5 includes an upper spring 51 and a lower spring 52, the upper spring 51 connects the upper end of the lens carrier 1 with the housing 2, and the lower spring 52 connects the lower end of the lens carrier 1 with the chassis 3.

One of the first driving component 42 and the second driving component 41 is a coil 42, the other is a magnet 41, and the coil 42 and the magnet 41 are arranged oppositely, so that when current is introduced into the coil 42, the coil 42 and the magnet 41 generate interaction, and the lens carrier 1 and the shell 2 are driven to generate relative displacement.

In some embodiments, the lens carrier 1 includes a carrier body 11, and the elastic polymer layer includes a first elastic polymer layer (not shown in the drawings) covering at least a part of an outer surface of the carrier body 11, and the first elastic polymer layer is used for preventing the carrier body 11 from being in direct contact with the housing 2 and/or the base 3. In other words, the first elastic polymer layer may be disposed between the carrier body 11 and the housing 2 for avoiding the direct contact between the carrier body 11 and the housing 2; or, the first elastic polymer layer is disposed between the carrier body 11 and the base 3, so as to prevent the carrier body 11 from directly contacting the base 3; still alternatively, the first elastic polymer layer is disposed between the carrier body 11 and the housing 2 and between the carrier body 11 and the base 3, so as to prevent the carrier body 11 from directly contacting the housing 2 and the base 3. First elasticity polymer layer can play the cushioning effect when lens carrier 1 contacts with shell 2 or base 3 to reduce because the piece that the collision produced, reach dirt-proof effect.

It is worth mentioning that the lens carrier 1 may further include a metal reinforcement 13 (not shown in fig. 1) disposed inside the carrier body 11, and the metal reinforcement 13 is used for enhancing the hardness of the lens carrier 1. The metal reinforcement 13 may be an iron sheet, a copper sheet, a steel sheet, or the like.

As shown in fig. 2 and 3, the carrier body 11 includes an inner surface 111 defining a cavity 110, a side surface 112 surrounding the inner surface, an upper end surface 113 connecting the inner surface 111 and the upper end of the side surface 112, and a lower end surface 114 connecting the inner surface 111 and the lower end of the side surface 112. The cavity 110 is adapted to receive a lens of a camera module.

The first elastic polymer layer may be a continuous layer covering at least one of the side surface 112, the upper end surface 113, and the lower end surface 114. In one embodiment, the first elastic polymer layer covers the entire outer surface of the carrier body 11, that is, the first elastic polymer layer covers the side surface 112, the upper end surface 113 and the lower end surface 114 of the carrier body 11, and any position of the outer surface of the carrier body 11 where the outer surface collides with the housing 2 or the base 3 has a buffering effect, so as to reduce the generation of the debris. In another embodiment, the first elastic polymer layer only covers the side surface 112 of the carrier body 11, and the main component colliding with the lens carrier 1 is the side wall of the housing 2, so that the problem of easy generation of debris when the lens carrier 1 collides with the housing 2 can be solved well by disposing the first elastic polymer layer on the side surface 112 of the carrier body 11 opposite to the side wall of the housing 2. It will be appreciated by those skilled in the art that the above list of locations where the first elastomeric polymer layer is disposed is not exhaustive and that other arrangements are readily contemplated as falling within the scope of the present application.

Considering that the maximum displacement of the lens carrier 1 during collision is not suitable to be excessive, the maximum deformable amount of the first elastic polymer layer should be limited to a certain extent, which can be achieved by controlling the thickness of the first elastic polymer layer or the elastic capacity of the first elastic polymer layer, so that the first elastic polymer layer can exert both the buffering function and the limiting function, and the thickness of the specific buffer layer needs to be set according to the actual lens size, and the thickness is not described in detail here.

The first elastic polymer layer may also be a discontinuous layer, i.e. it comprises a plurality of mutually independent portions. In some embodiments, the first elastic polymer layer includes a plurality of first buffer portions 911, as shown in fig. 4, each first buffer portion 911 is independently distributed on the surface of the carrier body 11, and the height of the outward protrusion of the first buffer portion 911 in each direction exceeds the maximum height of the carrier body 11 in that direction, so that the housing 2 or the base 3 surrounding the lens carrier 1 first contacts the first buffer portion 911 on the carrier body 11 no matter which direction the housing 2 or the base 3 collides with the lens carrier 1.

Those skilled in the art will appreciate that the outer surface of the carrier body 11 is generally not planar, and typically has raised structures 115 on its outer surface, such as posts for positioning the coil 42 or stops for limiting. When the carrier body 11 is brought into contact with a component arranged on its outer side, it is the raised structures 115 that come into contact first. The first buffer portions 911 may be provided on the surfaces of these convex structures 115, so that when the carrier body 11 is brought into contact with the components surrounding the outside thereof, the first buffer portions 911 are first brought into contact with the outside components. Of course, the first buffer portion 911 may be disposed around the protrusion structure 115, and it is only necessary that the first buffer portion 911 protrudes outward beyond the protrusion structure 115. The protrusion structures 115 may serve as a limit, and when the first buffer portion 911 is pressed to the maximum deformation, the protrusion structures 115 limit the carrier body 11 from being excessively displaced.

As shown in fig. 5, the side surface 112 of the carrier body 11 includes a base portion 1122 and a protruding structure 115 protruding from the base portion 1122, and the protruding structure 115 includes a first outer end 1151 facing outward and a first outer wall 1152 connecting the first outer end 1151 and the base portion 1122.

In some embodiments, the first buffer portion 911 is disposed on the first outer end 1151. Since the main collision part, namely, the first outer end 1151 of the protrusion structure 115, is located at the first outer end 1151 when the lens carrier 1 collides with the housing 2, the first buffer portion 911 provided at the first outer end 1151 can provide a good buffer effect, so as to prevent the occurrence of debris when the housing 2 collides with the lens carrier 1.

In other embodiments, as shown in fig. 6, the first buffer portion 911 covers the entire surface of the protrusion structure 115, i.e., the first buffer portion 911 covers the first outer end 1151 and the first outer wall 1152. When the protruding structure 115 has a relatively sharp corner, the corner is prone to generate debris during collision, so covering the first buffer portion 911 on the entire protruding structure 115 can better prevent the corner of the protruding structure 115 from generating debris during collision.

In still other embodiments, as shown in fig. 7, the first outer end 1151 of the protruding structure 115 has a groove 1153 thereon, the first buffer portion 911 is disposed in the groove 1153, and the outer end of the first buffer portion 911 protrudes out of the opening of the groove 1153. At this time, a part of the first buffer portion 911 is filled in the groove 1153, and the other part extends out of the groove 1153.

Fig. 8 shows an embodiment in which the protrusion structure 115 is a winding post 115A. The opposite sides of the carrier body 11 are respectively provided with a winding post 115A, the winding post 115A includes a first outer end 1151 facing outward and a first outer wall 1152 connecting the first outer end 1151 and the base portion 1122, and the coil 42 is wound on the first outer wall 1152. In order to avoid that the coil 42 directly collides with the magnet 41 to affect the energization performance of the coil 42 when the lens carrier 1 is displaced, the first outer end 1151 is further provided with a boss protruding outward to perform a limit function, the boss is provided with a groove 1153, the first buffer portion 911 is disposed in the groove 1153, and the outer end of the first buffer portion 911 protrudes from an opening of the groove 1153A. When a collision occurs (for example, when a reliability test is performed), the first buffer portion 911 collides with the magnet 41 first, and the boss also acts as a stopper for the lens carrier 1, so that excessive movement of the lens carrier 1 can be restricted.

In some embodiments, the base 3 includes a base body 31, and the elastic polymer layer includes the second elastic polymer layer (not shown in the figures), the second elastic polymer layer covers at least a part of the outer surface of the base body 31, and the second elastic polymer layer is used for preventing the lens carrier 1 from directly contacting the base body 31.

The second elastic polymer layer may be a continuous layer covering at least the entire outer surface of the mount body 31 opposite to the lens carrier 1. The advantage of setting up the whole face of second elasticity polymer layer lies in can directly utilizing current technology, simplifies production procedure, reduction in production cost.

The second elastomeric polymer layer may also be a discontinuous layer, i.e. it comprises a plurality of mutually independent portions. In some embodiments, the base body 31 is provided with a limiting boss 311 for limiting, and the limiting boss 311 protrudes toward the lens carrier 1 to limit the displacement of the lens carrier 1 toward the base 3. The second elastic polymer layer includes a plurality of second buffering portions 921, and the second buffering portions 921 are disposed on the limiting bosses 311, and when the lens carrier 1 collides with the base 3, first contact with the second buffering portions 921. The second buffering portion 921 may cover the entire surface of the restricting boss 311, as shown in fig. 10; or the second buffering part 921 only covers the end surface of the limiting boss 311 facing the direction of the lens carrier 1, as shown in fig. 11; alternatively, the end surface of the limiting boss 311 facing the lens carrier 1 has a groove, the second buffering part 921 is disposed in the groove, and the outer end of the second buffering part 921 protrudes out of the opening of the groove, as shown in fig. 12. Deformably, the second cushioning parts 921 are provided around the position restricting bosses 311, and the second cushioning parts 921 protrude outward by a height exceeding the height of the position restricting bosses 311, as shown in fig. 13.

Similarly, the elastic polymer layer may further include a third elastic polymer layer disposed on the housing 2, and the manner of disposing the third elastic polymer layer on the housing 2 may refer to the first elastic polymer layer or the second elastic polymer layer, which is not repeated herein.

The application provides a preparation method of an elastic high molecular layer, which comprises the following steps:

s1, injecting a predetermined amount of the second raw material 8 for forming a base layer into the injection mold 6, as shown in fig. 14B;

s2, injecting a predetermined amount of the first raw material 7 for forming an elastic polymer layer onto the second raw material 8 at a predetermined position of the injection mold 6, as shown in fig. 14C;

s3, curing the first material 7 and the second material 8, thereby forming the elastic polymer layer on the base layer.

In some embodiments, step S0 is further included before step S1, a metal reinforcement is placed in the injection mold 6, as shown in fig. 14A.

It is understood that the base layer referred to in step S1 refers to the surface of the movable member and/or the fixed member.

The application also provides a camera module, which comprises the motor.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. A motor for driving a lens of a camera module to move, the motor comprising a movable member and a fixed member, the lens being adapted to be mounted on the movable member, the movable member being movable relative to the fixed member, the motor comprising:

the motor further comprises an elastic polymer layer formed by an elastic polymer material, wherein the elastic polymer layer covers at least one part of the surface of the movable part and/or the fixed part, and the elastic polymer layer is used for avoiding the movable part from being in direct contact with the fixed part.

2. The motor according to claim 1, wherein the elastic polymer layer is directly molded on the surface of the movable member and/or the stationary member.

3. The motor according to claim 1, wherein the elastic polymer material has elasticity at normal temperature and does not lose its elasticity at 50 ℃ or lower, preferably 80 ℃ or lower.

4. The motor according to claim 1, wherein the elastic polymer material is rubber, and the elastic polymer material is selected from one of silicone rubber and urethane rubber.

5. The motor as claimed in claim 1, wherein the elastic polymer layer is made of polyurethane, and the surface of the moving member and/or the fixed member covered with the elastic polymer layer is made of LCP material.

6. The motor as claimed in any one of claims 1 to 5, wherein the moving member includes a lens carrier and a first driving assembly disposed on the lens carrier, the fixed member includes a housing, a base and a second driving assembly disposed on the housing, the lens carrier is used for carrying a lens, the housing is disposed around the lens carrier and fixed on the base, and the first driving assembly and the second driving assembly cooperate with each other to drive the lens carrier to move in a space defined by the housing and the base.

7. The motor of claim 6, further comprising an elastic member for movably supporting the lens carrier in a space defined by the housing and the base, wherein one of the first driving assembly and the second driving assembly is a coil and the other is a magnet, and the coil is disposed opposite to the magnet.

8. The motor of claim 6, wherein the lens carrier comprises a carrier body, wherein the elastic polymer layer comprises a first elastic polymer layer, wherein the first elastic polymer layer covers at least a part of the outer surface of the carrier body, and wherein the first elastic polymer layer is used for avoiding the carrier body from being in direct contact with the housing and/or the base.

9. The motor of claim 8, wherein the carrier body comprises an inner surface defining a cavity, a side surface surrounding the inner surface, an upper end surface connecting the inner surface and an upper end of the side surface, and a lower end surface connecting the inner surface and a lower end of the side surface, wherein a lens of a camera module is adapted to be mounted in the cavity, and the first elastic polymer layer covers at least one of the side surface, the upper end surface, and the lower end surface of the carrier body.

10. The motor as claimed in claim 8, wherein the first elastic polymer layer includes a plurality of first buffers, each of the first buffers being independently disposed on the surface of the carrier body, and a height of the first buffer protruding outward in each direction exceeds a maximum height of the carrier body in the direction.

11. The motor of claim 8, wherein the surface of the carrier body includes a base portion and a raised structure projecting from the base portion, the raised structure including a first outer end facing outward and a first outer wall connecting the first outer end to the base portion, the first elastomeric polymer layer including a plurality of first buffer portions,

the first buffer portion is disposed on the first outer end,

or, the first buffer portion covers the first outer end and the first outer wall,

or the first outer end is provided with a groove, the first buffer part is arranged in the groove, the outer end of the first buffer part protrudes out of the opening of the groove,

still alternatively, the first buffer part is arranged around the protruding structure, and the height of the outward protrusion of the first buffer part exceeds the height of the protrusion of the protruding structure.

12. The motor of claim 11, wherein the protruding structure is a winding post, the first drive component is a coil, the second drive component is a magnet, and the coil is wound around the winding post.

13. The motor of claim 6, wherein the mount comprises a mount body, and the resilient polymer layer comprises a second resilient polymer layer covering at least a portion of an outer surface of the mount body, the second resilient polymer layer for preventing the lens carrier from directly contacting the mount body.

14. The motor of claim 13, wherein the second elastic polymer layer covers an entire outer surface of the base opposite to the lens carrier.

15. The motor according to claim 13, wherein the base body is provided with a limiting boss for limiting, the limiting boss protrudes in a direction of the lens carrier to limit displacement of the lens carrier in the direction of the base, the second elastic polymer layer comprises a plurality of second buffer portions, the second buffer portions are disposed on the limiting boss, or the second buffer portions are disposed around the limiting boss, and a height of the outward protrusion of the second buffer portions exceeds a height of the protrusion of the limiting boss.

16. The motor of claim 15,

the second buffer part covers the whole surface of the limiting boss;

or the second buffer part covers the end face, facing the lens carrier, of the limiting boss;

or, a groove is formed in the end face of the limiting boss facing the direction of the lens carrier, the second buffering part is arranged in the groove, and the outer end of the second buffering part protrudes out of the opening of the groove.

17. A method of producing an elastomeric polymer layer according to claims 1-16, characterized in that it comprises the steps of:

s2, injecting a predetermined amount of the first material for forming the elastic polymer layer onto the second material at a predetermined position of the injection mold;

18. The method of claim 17, wherein step S1 is preceded by a step S0 of placing a metal reinforcement in the injection mold.

19. A camera module comprising a motor according to any one of claims 1 to 18.