CN114204730B - Motor and camera module - Google Patents

Abstract

The application provides a motor and a camera module. The motor comprises a movable part, a fixed part and a driving mechanism, wherein the fixed part defines a movable cavity, the movable part is movably arranged in the movable cavity, the driving mechanism is used for driving the movable part to move in the movable cavity, the motor further comprises at least one of a first characteristic, a second characteristic and a third characteristic, and the first characteristic is as follows: at least one part of the surface of the moving part and/or the fixed part is provided with an elastic polymer layer for reducing the direct contact between the moving part and the moving part; the second characteristic is: at least one part of the surfaces of the movable part and/or the fixed part is provided with dust catching glue for catching particles in the movable cavity; the third characteristic is: the fixed part is provided with at least one dust removing through hole on the side wall limiting the movable cavity, so that when the openings at the two ends of the movable cavity are closed, the dust removing through hole can communicate the movable cavity with the outside. The motor for the camera module can effectively reduce motor stain.

Description

Motor and camera module

Technical Field

The application relates to the technical field of camera modules, in particular to a motor and a camera module.

Background

In the imaging process of the camera module, no matter the driving lens realizes the focusing function or the anti-shake function, the driving component is an indispensable component of the high-pixel module. In general, the driving assembly in the mobile phone module is mainly a motor structure, and is divided according to different driving modes, so that the motor can be basically divided into a suspension motor and an SMA motor.

The working principle of the suspension wire motor is as follows: the motor structure comprises a movable part (a lens is arranged on the movable part) and a fixed part, a coil and a magnet structure are arranged at the opposite positions between the movable part and the fixed part, the coil is usually arranged on the movable part, the magnet is arranged on the fixed part, when current is introduced into the coil, the magnetic field generated by the coil interacts with the magnetic field of the magnet, so that the coil and the magnet relatively move, and the coil and the movable part are fixed together, so that the coil drives the movable part to move together, and the adjustment of the position of the lens is realized.

The operating principle of the SMA motor is as follows: the driving force of the SMA motor is provided by SMA (shape memory alloy) metal, the SMA can change the shape of the SMA along with the change of temperature, the SMA member is matched with the lens structure, when current is introduced into the SMA member, the SMA member stretches to drive the lens structure to move, and the driving force of the SMA member is changed by adjusting the magnitude of the current.

At present, the driving technology of the motor is mature, but the problem of the stain in the motor is always plagued by manufacturers, the stain in the motor may fall into the structures such as a photosensitive chip, and serious influence is caused on the imaging quality of the camera module, and even the poor camera module is caused, so that the problems of customer return and the like are caused, and according to statistics, the poor camera module caused by the stain of the motor reaches 10%. The motor has problems of stain in the motor production and manufacturing process and in the motor detection or transportation process, so the dust prevention of the motor is always a focus in the industry.

The sources of motor stains are mainly three paths:

1. in the motor production process, the components such as a shell, a carrier or a base and the like which form the motor are manufactured by adopting an injection molding process, the surfaces of the components are not smooth after injection molding, a plurality of burrs or dust fall exists, when the components are assembled into a motor structure, the burrs or dust fall falling off from the surfaces of the components can be assembled in the motor to form a motor stain, and in addition, dust in the production environment can enter the motor along with the assembly of the motor to form the motor stain.

2. During motor inspection, debris may be generated between the components of the motor due to collisions, creating motor stains. For example, when the motor is subjected to a reliability test, the motor needs to be impacted continuously, and at the moment, the carrier collides with the magnet, so that certain scraps are generated; in addition, during the movement of the carrier, the anti-collision boss on the carrier and the anti-collision structure on the base can collide to generate fragments.

3. In the transportation process of the camera module, collision is unavoidable, and at the moment, the motor assembled in the camera module can generate fragments at the collision part to form motor stains.

4. In the working process of the camera module, dust falling in the external environment can possibly enter the motor from a gap of the motor structure to form motor stains.

In addition to the four points listed above, motor blemishes may have other sources, solving the problem of blemishes inside the motor is currently an urgent need in the industry.

Disclosure of Invention

An object of the present application is to provide a motor for a camera module, which can effectively reduce the occurrence of stains inside the motor.

Another object of the present application is to provide a camera module, which can effectively avoid the influence of the imaging quality on the color filter caused by the stain of the motor or the movement of the particles entering the camera module through the motor.

In order to achieve the above object, the present application provides a motor, including a moving part, a fixed part, and a driving mechanism, where the fixed part defines a moving cavity with two open ends, the moving part is movably installed in the moving cavity, the driving mechanism is used to drive the moving part to move in the moving cavity, the motor further includes at least one feature of a first feature, a second feature, and a third feature,

the first characteristic is as follows: an elastic polymer layer is arranged on at least a part of the surface of the moving part and/or the fixed part so as to reduce the direct contact between the moving part and the moving part;

the second characteristic is as follows: dust catching glue is arranged on at least a part of the surfaces of the movable part and/or the fixed part and used for capturing particles in the movable cavity;

the third characteristic is as follows: the fixed part is provided with at least one dust removing through hole on the side wall limiting the movable cavity, so that when the openings at the two ends of the movable cavity are closed, the dust removing through hole can communicate the movable cavity with the outside.

Further, the fixed part comprises a shell and a base, the shell surrounds the movable part and is fixed on the base, a first light through hole is formed in the middle of the base to allow light to pass through, the shell and the base define the movable cavity, the driving mechanism comprises a magnet and a coil, one of the magnet and the coil is arranged on the side surface of the movable part, the other is arranged on the inner wall of the shell, and the coil is opposite to the magnet.

Further, the side surface of the moving part comprises a base part and a winding post protruding out of the base part, the coil is wound on the side surface of the winding post, the end surface of the winding post protrudes out of the coil, and the elastic polymer layer at least covers the end surface of the winding post.

Further, the side surface of the moving part comprises a base part and a winding post protruding out of the base part, the coil is wound on the side surface of the winding post, a limiting boss is further arranged on the end surface of the winding post, and the elastic polymer layer at least covers the end surface of the limiting boss.

Further, the elastic high-layering is arranged on the moving part, and the elastic high-molecular layer is directly formed on the moving part.

Further, the dust catching glue is arranged on the base and is positioned on the surface of the base opposite to the moving part, and the dust removing through hole is formed in the base.

Further, the base is provided with a plurality of dust removing through holes, the dust removing through holes are uniformly distributed at four corners of the base, and the aperture of each dust removing through hole is not more than 0.1mm.

The utility model provides a camera module, including the motor, the camera module still includes lens mount, camera lens, colour filter, sensitization chip and circuit board, the sensitization chip is located on the circuit board and with circuit board conductive connection, the lens mount sets up on the circuit board, the colour filter passes through the lens mount keeps the camera lens with between the sensitization chip, the motor sets up on the lens mount, the motor move the lens mount cavity of a both ends open-ended is limited to the part, the camera lens include with lens mount cavity inner wall connection's lens cone and install a plurality of lenses in the lens cone, the lens mount has and is used for the installation the second through-hole of colour filter and around the lens mount up end outside the second through-hole, the setting of motor is in on the lens mount up end, the lens mount up end has around first step and the second step that the second through-hole set up, first step with the second step is radial, the first step is defined with the second step is in the lens mount surface is in the second step is used for the second step is in the support surface and is used for the second step is in the relative surface of support surface and the lens mount is used for limiting.

Further, a surface of the second step is at least 0.4mm higher than an upper surface of the color filter.

Further, the second step is located on the inner side of the first step, a first light-passing hole for passing light is formed in the bottom of the fixed part, at least one part of the first step is opposite to the first light-passing hole, and the width of the first step is not smaller than 0.3mm.

Further, the second step extends to the edge of the second light through hole, or a boss is arranged on the upper end face of the lens base around the edge of the second light through hole, and the boss is located on the inner side of the second step.

Further, the first step is a circular ring, the second step is a circular ring or a rectangular ring, or the first step and the second step are rectangular rings.

Further, the first step is divided into a plurality of independent step sections by the support surface.

Further, the first step is located inside the second step.

The advantages and other technical features of the present application will be further described in the detailed description.

Drawings

FIG. 1 is a schematic diagram of one embodiment of a motor of the present application;

FIG. 2 is an exploded schematic view of one embodiment of a motor of the present application;

FIG. 3 is a schematic diagram of one embodiment of a moving part of the motor of the present application;

FIG. 4 is a schematic diagram of one embodiment of a moving part of the motor of the present application;

FIG. 5 is a schematic cross-sectional view of one embodiment of a motor of the present application, with a broken line showing a lens mounted on a motor moving part;

FIG. 6 is a schematic cross-sectional view of one embodiment of a motor of the present application, shown partially;

FIG. 7 is a schematic cross-sectional view of one embodiment of a motor of the present application, shown partially;

FIG. 8 is a schematic view of an embodiment of a method of producing a polymeric elastic layer;

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

FIG. 10 is a schematic view of an embodiment of the placement of dust catching glue;

FIG. 11 is a schematic diagram of one embodiment of a motor of the present application;

FIG. 12 is a schematic view of one embodiment of a camera module of the present application;

FIG. 13 is a schematic view of an embodiment of a lens holder of an image capturing module according to the present application;

FIG. 14 is a schematic view of one embodiment of a camera module of the present application;

FIG. 15 is a schematic view of an embodiment of a lens holder of an image capturing module according to the present application;

FIG. 16 is a schematic diagram of one embodiment of a camera module of the present application;

FIG. 17 is a schematic view of an embodiment of a lens holder of an imaging module of the present application;

FIG. 18 is a schematic view of an embodiment of a lens holder of an imaging module of the present application;

FIG. 19 is a schematic view of an embodiment of a lens holder of an imaging module of the present application;

in the figure: 100. a moving member; 101. a lens mounting cavity; 111. an inner surface; 112. a side surface; 1122. a base portion; 1123. a winding post; 1124. a limit boss; 113. an upper end surface; 114. a lower end surface; 200. a fixed part; 201. a movable cavity; 202. a dust removal through hole; 210. a housing; 220. a base; 222. a first light-passing hole; 310. a coil; 320. a magnet; 500. an elastic polymer layer; 601. a spring is arranged; 602. a lower spring;

10. a motor; 20. a lens; 21. a lens barrel; 22. a lens; 30. a lens base; 31. a second light-passing hole; 32. the upper end surface of the lens seat; 33. a first step; 34. a second step; 40. a color filter; 50. a photosensitive chip; 60. and a circuit board.

Detailed Description

The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth terms such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific protection scope of the present application that the device or element referred to must have a specific azimuth configuration and operation, as indicated or implied.

It should be 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 objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present 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 that are expressly listed or inherent to such process, method, article, or apparatus.

[ Motor ]

The application provides a motor 10 for a camera module, which comprises a moving part 100, a fixed part 200 and a driving mechanism, wherein the fixed part 200 defines a movable cavity 201 with two open ends, the moving part 100 is movably arranged in the movable cavity 201, the driving mechanism is used for driving the moving part 100 to move in the movable cavity 201, the moving part 100 defines a lens mounting cavity 101 with two open ends, and a lens 20 of the camera module is suitable for being mounted in the lens mounting cavity 101. When the motor 10 works, the driving mechanism drives the moving part 100 to displace relative to the fixed part 200, and then the moving part 100 drives the lens 20 to displace, so as to realize the adjustment of the position of the lens 20.

In some embodiments, a portion or the entire constituent parts of the moving part 100, the stationary part 200 are made of plastic materials, such as LCP materials, which are relatively weak compared to metal materials and are prone to generate debris during impact, which is also a major source of motor discoloration during motor manufacturing, assembly or inspection. In order to reduce the occurrence of this portion of the stain, the present application proposes the following solutions: an elastic polymer layer 500 is provided on at least a portion of the surface of the moving part 100 and/or the fixed part 200 of the motor to reduce direct contact of the moving part 100 with the fixed part 200. The elastic polymer layer 500 has certain elasticity, and the elastic polymer layer 500 can play a role in buffering when collision occurs, so that damage to collision components and generation of fragments are prevented. Preferably, the elastic polymer layer 500 is disposed on the surface of the movable member 100 and/or the stationary member 200 facing the movable chamber 201. Those skilled in the art will appreciate that the surface of the movable member 100 that faces the movable chamber 201, i.e., the outer surface of the movable member 100, and the surface of the stationary member 200 that faces the movable chamber 201, i.e., the inner surface of the stationary member 200.

The plastic parts are usually manufactured by an injection molding process, the surface of the injection molded part is untreated, more dust or burrs exist, and when the motor is assembled, the dust or burrs on the plastic surface fall off to form motor stains. To reduce the occurrence of such stains, it is preferable that the elastic polymer layer 500 is provided on the plastic surface of the movable member 100 and/or the stationary member 200. The elastic polymer layer 500 covers the plastic surface of the motor component, so that collision can be avoided to directly occur on the plastic surface, and chips are prevented from being generated on the plastic surface.

The elastic polymer layer 500 will be described in detail later.

In the motor assembly process, dust in the environment can also enter the motor to form motor stains, and in order to reduce the generation of the stains, the application provides the following solutions: dust catching glue is provided on at least a part of the surface of the moving part 100 and/or the stationary part 200 of the motor facing the moving chamber 201 for catching particles in the moving chamber 201. In other words, the dust catching glue has viscosity and can be used for adhering particles falling on the dust catching glue, so that the dust catching glue can effectively prevent the particles from freely moving in the motor and can also prevent the particles from moving to a lens, a color filter or a photosensitive chip to influence the imaging quality of a subsequent module. The dust catching glue will be described in detail later.

After the motor encapsulation is accomplished, the inside spot problem that exceeds standard that probably exists of motor, in order to solve the spot problem that exists after the motor encapsulation, can wash the motor before the motor equipment becomes the camera module, blow dirt to guarantee the inside cleanness of motor. However, after the motor structure is encapsulated, the movable part 100 is encapsulated in the movable cavity 201 defined by the fixed part 200, so that dust in the motor is difficult to clean out, and the following solutions are proposed in the present application to solve the problem: the fixed member 200 has at least one dust removing through hole 202 on a sidewall defining the movable chamber 201 such that the dust removing through hole 202 communicates the movable chamber 201 with the outside when openings at both ends of the movable chamber 201 are closed. After the motor is assembled, dust removal can be performed by the following method: firstly, carrying out treatment on dust falling existing on the surface of a motor through an ion fan; then, the water flow is utilized to clean the dust falling inside the motor, and in the cleaning process, the water flow firstly flows into the motor and then carries the dust falling inside the motor to flow out of the dust removal through hole 202; and (5) drying after cleaning. Details of the dust removal through holes are described later.

In some embodiments, the stationary member 200 of the motor 10 includes a housing 210 and a base 220, as shown in fig. 1-4. The housing 210 is disposed around the movable member 100 and fixed to the base 220, and a first light passing hole 222 is formed in a middle portion of the base 220 to allow light to pass therethrough, and the housing 210 and the base 220 define the movable chamber 201. The movable member 100 includes an inner surface 111 defining the lens mount chamber 101, a side surface 112 surrounding the peripheral side, an upper end surface 113 connecting the inner surface 111 and an upper end of the side surface 112, and a lower end surface 114 connecting the inner surface 111 and a lower end of the side surface 112. The upper end of the movable member 100 is connected to the housing 210 through an upper spring 601, the lower end of the movable member 100 is connected to the base 220 through a lower spring 602, and the movable member 100 is movably supported in the movable chamber 201 by the upper spring 601 and the lower spring 602. The driving mechanism includes a coil 310 and a magnet 320, one of the magnet 320 and the coil 310 is disposed on the side surface 112 of the movable member 100, the other is disposed on the inner wall of the housing 210, and the coil 310 is disposed opposite to the magnet 320 so that when current is applied to the coil 310, the coil 310 interacts with the magnet 320 and the driving member 100 is displaced relative to the housing 210.

In some embodiments, as shown in fig. 5, the side surface 112 of the moving member 100 includes a base portion 1122 and a winding post 1123 protruding from the base portion 1122, and the coil 310 is wound around the side of the winding post 1123, that is, the magnet 320 is disposed on the housing 210. Preferably, the thickness of the outward protrusion of the winding pin 1123 is greater than the thickness of the outward protrusion of the coil 310, i.e., the end surface of the winding post 1123 protrudes from the coil 210, so as to prevent the coil 310 from colliding with the magnet 320 provided on the fixed member 200 when the movable member 100 is displaced.

In some embodiments, as shown in fig. 6, a limiting boss 1124 is further provided on an end surface of the winding post 1123, for limiting excessive movement of the moving member 100, and improving accuracy of motor adjustment.

[ elastic Polymer layer ]

In some embodiments, the elastomeric polymer layer 500 covers the entire outer surface of the moving member 100, i.e., the elastomeric polymer layer 500 covers the side surface 112 of the moving member 100, the upper end surface 113 of the moving member 100, the lower end surface 114 of the moving member 100. Any position of the moving member 100 collides with the outer member, and the elastic polymer layer 500 plays a role of buffering, thereby reducing generation of chips. The elastic polymer layer 500 is disposed on the whole surface to greatly reduce particles generated by the falling of burrs on the surface of the moving part 100, and is also beneficial to avoiding direct collision between the moving part 100 and other external parts from various angles.

In other embodiments, the elastic polymer layer 500 may cover only a portion of the outer surface of the movable member 100, and as shown in fig. 7, the elastic polymer layer 500 covers the side surface 112 of the movable member 100. The location of the elastic polymer layer 500 may be selected according to practical needs, which is not listed here.

In the embodiment shown in fig. 5, the elastic polymer layer 500 covers at least the end surface of the winding post 1123. When the movable member 100 collides with the magnet 320 around the outside thereof at the time of reliability detection of the motor, the collision first occurs on the elastic polymer layer 500, and generation of chips due to collision of the plastic surface of the movable member 100 with the magnet 320 can be prevented.

In the embodiment shown in fig. 6, the elastic polymer layer 500 at least covers the end surface of the limiting boss 1124. When the moving member 100 collides with the magnet 320 around the outside thereof, the collision first occurs on the elastic polymer layer 500, and the generation of debris caused by the collision of the plastic surface of the moving member 100 with the magnet 320 can be prevented.

In some embodiments, the elastic polymer layer 500 also covers the entire surface (not shown) of the base 220 opposite to the movable member 100. The elastic polymer layer 500 can cover burrs and the like on the surface of the base 220 inside the elastic polymer layer, which is beneficial to reducing the generation of scraps, in addition, the elastic polymer layer 500 can play a role in buffering when the base 220 collides with other parts, so that the other parts are prevented from being damaged by collision, and scraps can be prevented from being generated on the plastic surface of the elastic polymer layer 500.

In other embodiments, the surface of the base 220 opposite to the moving member 100 has a base limiting platform, which extends toward the moving member 100 and is used to limit excessive displacement of the moving member 100 toward the base 220, and the elastic polymer layer 500 covers at least an end surface of the base limiting platform. When the moving part 100 moves towards the base 220 to collide with the base limiting table, the collision firstly occurs on the elastic polymer layer 500, so that the generation of fragments caused by collision between the moving part 100 and the plastic surface of the base 220 can be avoided.

The elastic polymer layer 500 has elasticity at normal temperature, is elastically deformed when it receives an external force, and can recover the deformation after the external force disappears. The elastic polymer layer 500 needs to have good thermal stability to ensure that it can still perform its function at a high temperature. In some embodiments, the elastic polymer layer 500 does not lose its elasticity below 50 ℃, preferably the elastic polymer layer 500 does not lose its elasticity below 80 ℃.

The elastic polymer layer 500 is made of crosslinked polymer, and is not easy to generate scraps during collision and burrs on the surface during preparation compared with inelastic plastic. The material of the elastic polymer layer 500 may be various silicone rubbers, polyurethane rubbers, or the like. In some embodiments, the material of the elastic polymer layer 500 is polyurethane, which has excellent heat resistance, wear resistance and good elasticity, and can well meet the requirements of the application on various properties of the elastic polymer layer 500.

The elastic polymer layer 500 may be adhered to the substrate by an adhesive, but the process of adhering the elastic polymer layer 500 by an adhesive is complicated, and the elastic polymer layer 500 is easily detached, which affects the service life.

The elastomeric polymer layer 500 may also be molded directly onto the substrate.

In some embodiments, the elastomeric polymer layer 500 is prepared by the following method: setting a second raw material for forming the movable part 100 or the fixed part 200 in an injection mold, setting a first raw material for forming the elastic polymer layer 500 at a preset position of the second raw material, synchronously curing and forming the first raw material and the second raw material in the injection mold, forming a main body structure of the movable part 100 or the fixed part 200 after the second raw material is cured, and forming the elastic polymer layer 500 covering the main body structure after the first raw material is cured. By adopting the process to prepare the elastic polymer layer 500, the elastic polymer layer 500 can be better integrated with the main structure, and the risk of falling off of the elastic polymer layer 500 does not exist in the follow-up process.

In other embodiments, the elastomeric polymer layer 500 is prepared by the following method: the movable member 100 or the fixed member 200 is molded first, and then the first material is disposed at a position where the movable member 100 or the fixed member 200 needs to be disposed with the elastic polymer layer 500, and the elastic polymer layer 500 is formed after the first material is cured.

It will be appreciated that in each of the above embodiments, the first raw material may be a prepolymer for forming the elastic polymer layer 500, which has a certain fluidity and can be used for injection molding. The curing method of the first raw 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.

Preferably, the material of the elastic polymer layer 500 has better compatibility with the plastic of the substrate, so as to improve the adhesion of the elastic polymer layer 500 on the surface of the plastic. In a specific embodiment, the material of the plastic surface is an LCP material, the material of the elastic polymer layer 500 is polyurethane, the elastic polymer layer 500 is in a transparent film shape, the LCP material is a common material for preparing motor components, and the applicant finds that the polyurethane material can well meet the requirements of the elastic polymer layer 500 on elasticity, thermal stability, compatibility and the like through repeated screening.

As shown in fig. 8, the preparation method of the elastic polymer layer 500 may refer to the following steps:

s1, injecting a preset amount of second raw material B for forming a base layer into an injection mold M;

s2, injecting a preset amount of first raw material A for forming the elastic polymer layer 500 onto the second raw material B at a preset position of the injection mold M;

s3, curing the first raw material A and the second raw material B, thereby forming the elastic polymer layer 500 on the base layer.

It will be understood that the base layer in steps S1 and S3 refers to the plastic surface of the moving part 100 or the fixed part 200.

In some embodiments, step S0 is further included before step S1, and the metal reinforcement member C is placed in the injection mold. The material of the metal reinforcement C may be iron or copper.

Preferably, the first raw material A and the second raw material B have better compatibility.

[ dust-catching glue ]

The dust catching glue can not flow at normal temperature and can be stably kept at the initial position. The dust catching gel is not easy to solidify, can maintain a wet state for a long time at normal temperature to adhere particles, and the viscosity of the dust catching gel is not lost with the extension of the service time.

In some embodiments, the dust catching glue is DP01 photo-curing glue, which is UV curing glue, and the curing time is 2-5 seconds, so that the dust catching glue is suitable for various high-temperature and high-humidity environments. The DP01 photo-curing glue has lower cost and mature preparation technology at present. The DP01 photo-curing glue is simple to operate, has small influence on the original process flow, and has good dust and impurity adsorption effect.

It is worth mentioning that in the motor reliability detection process, when the motor needs to be guaranteed to withstand the impact and high-temperature and high-humidity environment, the dust catching glue does not lose the viscosity of the motor, and the dust catching glue can not adhere to other parts in the motor, so that the performance of the glue such as the use temperature and viscosity needs to be considered when the dust catching glue is selected.

The dust catching glue is arranged in the motor 10, so that the problem of production efficiency reduction caused by dust pollution in the motor assembly process can be solved, and the motor can be ensured to be kept clean for a long time in the use process.

In some embodiments, the dust catching glue is disposed on the base 220 of the fixed component 200 and on the surface of the base 220 opposite to the movable component 100, and the dust falling from the motor 10 falls onto the base 220 under the action of gravity, so that the dust catching glue is disposed on the surface of the base 220, so that the dust falling from the motor 10 can be effectively caught, and when the motor 10 is assembled to the camera module, the dust falling is firmly adhered to the dust catching glue and cannot fall onto a chip or a color filter of the camera module. In the embodiment shown in fig. 9, the dust catching glue is arranged in the area indicated by the dashed box in the figure.

The dust catching glue can be arranged on the base 220 in a manual smearing way or can be sprayed by a machine. If the dust catching glue is set in a machine spraying manner, spraying can be performed by adopting a shielding method, that is, a baffle plate D with a hollowed-out area is arranged above the base 220, the hollowed-out area is opposite to an area (an area with a dotted line frame) on the base 220, where the dust catching glue needs to be arranged, when the glue is sprayed, the glue can reach the corresponding position of the base 220 through the hollowed-out area of the baffle plate D, and no glue exists at the position corresponding to the non-hollowed-out area of the baffle plate D, as shown in fig. 10, so that the glue can be prevented from being sprayed at a non-preset position, and the normal operation of the motor is influenced.

Those skilled in the art will appreciate that the larger the area of the dust catching gel, the higher the likelihood that particles within the motor 10 will be caught by the dust catching gel, and the lower the probability that particles within the motor 10 will fall onto the chip or color filter, without affecting the mounting of other components. As shown in fig. 9, the dust catching glue may be provided at four corners where other elements are not mounted, in addition to the areas indicated by the dotted line boxes.

The dust catching gel may be disposed on the base 220, and may be disposed on the inner wall of the housing 210, the magnet 320, the upper spring 601, or the lower spring 602, as long as the setting of the dust catching gel does not affect the normal operation of the components.

[ dust-removing through-hole ]

The main purpose of providing the dust removal through hole 202 on the stationary part 200 of the motor 10 is: in the cleaning process of the motor 10, the motor 10 is communicated with the outside, when the inside of the motor 10 is provided with particles, water flows into the motor 10 to carry the particles, and then the water carrying the particles can flow out of the dust removing through holes 202, so that the motor 10 is cleaned more thoroughly.

In some embodiments, the dust removal through hole 202 is provided on a bottom surface of the base 220 opposite to the movable member 100. The dust removing through holes 202 are provided on the bottom surface of the base 220, so that the stability of the overall structure of the motor is not substantially affected, and the available space on the bottom surface of the base 220 is large, so that a plurality of dust removing through holes 202 can be provided. The dust removing through holes 202 may be circular through holes or square through holes, and the specific shape of the dust removing through holes 202 is not limited in this application.

The aperture of the dust removing through hole 202 should not be too small, otherwise the dust removing effect is not obvious, the aperture of the dust removing through hole 202 should not be too large, otherwise the stability of the motor is affected, and the aperture of the dust removing through hole 202 can be 0.05 mm-0.15 m.

In some embodiments, at least one dust removing through hole 202 is respectively disposed at four corners of the base 220, so as to ensure that the water flow carrying the particles can flow out of the motor sufficiently during the cleaning of the motor, and reduce the particles remained in the motor.

The dust removing through hole 202 may be formed when the base 220 is molded, that is, when the base 220 is injection-molded, a position of the dust removing through hole 202 is reserved in the injection mold. The dust removing through holes 202 may also be provided on the base 220 in a manner such as punching holes on the already formed base 220 to form the dust removing through holes 202. The formation manner of the dust removing through hole 202 is not limited in this application.

The shape, structure, etc. of the base 220 of the motor of different models may be different, and the arrangement position of the dust removing through hole 202 needs to be determined in combination with the specific shape and structure of the motor. Typically, the dust removing through holes 202 are provided at four corners of the base 220, and preferably, one dust removing through hole 202 is provided at each of the four corners of the base 220. However, in some embodiments, other components have been installed at four corners of the base 220, and in order to avoid the dust removing through holes 202 from affecting the stability of the motor, a plurality of dust removing through holes 202 may be respectively provided at positions near the four corners of the base 220, as shown in fig. 11.

It should be noted that, after the motor 10 is cleaned, the dust removing through hole 202 may not be sealed, when the motor 10 is assembled into the camera module, the motor 10 is connected with the lens 20, then the motor 10 is arranged on the lens holder 30, at this time, the base 220 is opposite to the upper end surface of the lens holder 30, and when the motor 10 is connected with the lens holder 30, the dust removing through hole 202 may be sealed by the smeared glue, and of course, even if the glue does not completely seal the dust removing through hole 202, the normal operation of the motor 10 is not affected.

In other embodiments, the dust removing through hole 202 may be formed in the housing 210, for example, an upper end surface of the housing 210 or a side surface of the housing 210. The arrangement manner may refer to the arrangement manner of the dust removing through hole 202 on the base 220, which is not described herein.

[ Camera Module ]

The application also provides a dustproof effectual module of making a video recording, can effectively avoid outside particulate matter to fall into on chip or the light filter via the gap of motor.

In the embodiment shown in fig. 12, the image capturing module includes a motor 10, a lens 20, a lens holder 30, a color filter 40, a photosensitive chip 50, and a circuit board 60. The photosensitive chip 50 is disposed on the circuit board 60 and is electrically connected to the circuit board 60, the lens holder 30 is disposed on the circuit board 60, the motor 10 is disposed on the lens holder 30, the lens 20 is held above the photosensitive chip 50 by the motor 10, and the color filter 40 is held between the lens 20 and the photosensitive chip 50 by the lens holder 30. The motor 10 may be referred to the motor 10 described in the foregoing application, and will not be described herein.

The lens 20 includes a barrel 21 and a plurality of lenses 22 mounted in the barrel 21. The lens barrel 21 is connected to the inner wall of the lens mount chamber 101 of the movable member 100. The middle part of the lens base 30 is provided with a second light through hole 31, the color filter 40 is arranged in the second light through hole 31, the lens base 30 is also provided with a lens base upper end surface 32 surrounding the second light through hole 31, the base 220 of the motor 10 is arranged on the lens base upper end surface 32, and the lower end of the lens cone 21 is opposite to the lens base upper end surface 32.

At the module during operation of making a video recording, outside particulate matter can fall into mirror mount up end 32 from the clearance between part 100 and the fixed part 200, and then remove to colour filter 40 or on the sensitization chip 50, in order to avoid this part particulate matter to influence the formation of image of the module of making a video recording, this application provides following solution: the upper end surface 32 of the lens holder has a first step 33 and a second step 34 disposed around the second light-passing hole 31, the first step 33 being radially adjacent to the second step 34, i.e., the first step 33 is inside or outside the second step 34. The lower end of the lens barrel 21 is opposite to the second step 34, and the second step 34 is used for limiting the lens barrel 21 so as to prevent the lens 22 from colliding with the color filter 40 when the lens 20 moves. The first step 33 has a dust catching gel provided on its surface for catching particles falling from the gap of the motor 10. The dust catching glue may be provided at a partial area or the entire area of the first step 33.

The upper end surface 32 of the lens base further has a supporting surface for supporting the fixing member 200, the supporting surface surrounds the outer sides of the first step 33 and the second step 34, and the surface of the supporting surface is higher than the surfaces of the first step 33 and the second step 34.

In some embodiments, the surface of the second step 34 is higher than the upper surface of the color filter 40 disposed in the second light passing hole 31, the surface of the second step 34 is opposite to the lower end of the lens barrel 21, and the second step 34 serves to limit the displacement of the lens barrel 21 to prevent the lens 22 mounted in the lens barrel 21 from colliding with the color filter 40 when the lens 20 is in focus. In some embodiments, the surface of second step 34 is at least 0.4mm above the upper surface of color filter 40.

In some embodiments, the second step 34 is located inside the first step 33, i.e. the second step 34 is closer to the second light passing hole 31 than the first step 33. At least a portion of the first step 33 is opposite to the first light passing hole 222 of the motor 10 so that the particulate matter falling from the first light passing hole 222 can fall onto the first step 33 and be caught by the dust catching gel on the first step 33.

In some embodiments, the width of the first step 33 is not less than 0.3mm, and the larger the area of the first step 33, the larger the area of dust catching glue that can be disposed, and the better the dust catching effect.

In some embodiments, the first step 33 is a circular ring, as shown in fig. 13 or 17, that is, the first step 33 conforms to the shape of the inner wall of the first light-passing hole 222. The inner diameter of the first light passing hole 222 is preferably equal to or slightly larger than the outer diameter of the first step 33 so that dust falling from the first light passing hole 222 can be just caught by the dust catching gel on the first step 33.

It should be noted that, since the lower end of the lens barrel 21 extends to the first light-passing hole 222, the dust falling from the first light-passing hole 222 mainly falls from the gap between the inner wall of the first light-passing hole 222 and the outer wall of the lens barrel 21, and since the lower end of the lens barrel 21 is opposite to the second step 34, the particulate matter does not fall directly onto the color filter 40.

In some embodiments, the horizontal distance a between the outer wall of the lens barrel 21 and the inner edge of the first step 33 is not less than 0.2mm, as shown in fig. 14, to prevent the lens barrel 21 from hitting dust catching gel on the first step 33 when the lens 20 moves. Preferably, the distance b between the inner wall of the first light passing hole 222 and the outer wall of the lens barrel 21 is not less than 0.5mm so that the particulate matter falling from the gap can fall exactly on the dust catching gel of the first step 33.

In some embodiments, the first step 33 and the second step 34 are rectangular rings, as shown in fig. 15, that is, the shapes of the first step 33 and the second step 34 are consistent with the shape of the second light-transmitting hole 31, which contributes to miniaturization of the whole camera module.

In some embodiments, the second step 34 extends to the edge of the second light-passing hole 31, as shown in fig. 16, to facilitate increasing the lateral movement space of the lens 20. In other embodiments, the upper end surface 32 of the lens base is provided with a boss 35 surrounding the edge of the second light through hole 31. As shown in fig. 12, the boss 35 is located inside the second step 34, and the boss 35 may be used to limit lateral movement of the lens 20 and also prevent some particles from moving from the lens holder upper end surface 32 to the color filter 40.

In some embodiments, the first step 33 is divided into a plurality of independent step sections 331 by the supporting surface of the upper end surface 32 of the lens holder, as shown in fig. 18, so as to leave a larger space on the upper end surface 32 of the lens holder for bonding the base 220 and the lens holder 30, thereby improving the strength of the image capturing module.

It is understood that, when the first step 33 and the second step 34 are not identical to the second light-passing hole 31 in shape, the first step 33 and the second step 34 may be divided into a plurality of independent portions by the edge of the second light-passing hole 31 as shown in fig. 17.

In some embodiments, the first step 33 is located inside the second step 34, as shown in fig. 19, which is advantageous for downsizing the overall size of the camera module. Because the size of the lens 20 of the camera module is fixed, the first step 33 is arranged on the inner side of the second step 34, so that the overall size of the camera module is smaller, and under the same specification of the lens 20, a smaller photosensitive chip 50 and a smaller motor 10 can be designed, thereby realizing the miniaturization of the camera module.

The upper surface of the first step 33 and the upper surface of the second step 34 may be the same in height to facilitate preparation. The upper surface of the first step 33 may be lower than the upper surface of the second step 34, and the upper surface of the first step 33 may be higher than the upper surface of the second step 34.

The first step 33 provided with the dust catching glue is separated from the second step 34 used for limiting in the radial direction, so that the risk that the lens barrel 21 collides with the dust catching glue when the lens 20 focuses is avoided, the second step 34 used for limiting can be set as low as possible, and only the upper surface of the color filter 40 is required to be slightly higher than the upper surface of the color filter. By lowering the height of the second step 34, the stroke of focusing of the lens barrel 21 is increased.

The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection of the present application is defined by the appended claims and equivalents thereof.

Claims (16)

1. The motor is characterized by comprising a moving part, a fixed part and a driving mechanism, wherein the fixed part is used for limiting a movable cavity with two open ends, the moving part is movably installed in the movable cavity, the driving mechanism is used for driving the moving part to move in the movable cavity, the side surface of the moving part comprises a base part and a winding column protruding out of the base part, and an elastic polymer layer is covered on the end surface of the winding column so as to reduce fragments generated when the moving part collides with the fixed part.

2. A motor according to claim 1, wherein dust catching glue is provided on at least a part of the surface of the moving part and/or the stationary part for capturing particulate matter in the moving chamber.

3. The motor of claim 1, wherein the fixed member has at least one dust removing through hole on a side wall defining the movable chamber such that the dust removing through hole communicates the movable chamber with the outside when openings at both ends of the movable chamber are closed.

4. A motor according to any one of claims 1 to 3, wherein the fixed member includes a housing and a base, the housing being disposed around the movable member and fixed to the base, a first light passing hole being provided in a middle portion of the base to allow light to pass therethrough, the housing and the base defining the movable chamber, and the driving mechanism includes a magnet and a coil, one of the magnet and the coil being disposed on a side surface of the movable member, the other being disposed on an inner wall of the housing, the coil being disposed opposite to the magnet.

5. The motor of claim 4, wherein the coil is wound around a side surface of the winding post, and an end surface of the winding post protrudes from the coil.

6. The motor of claim 4, wherein the side surface of the moving member comprises a base portion and a winding post protruding from the base portion, the coil is wound around a side surface of the winding post, a limit boss is further provided on an end surface of the winding post, and the elastic polymer layer covers at least an end surface of the limit boss.

7. A motor according to any one of claims 1 to 3, wherein the elastic polymer layer is provided on the moving member, and the elastic polymer layer is directly molded on the moving member.

8. A motor according to claim 5 or 6, wherein dust catching glue is provided on at least a part of the surface of the moving part and/or the stationary part for capturing particulate matter in the moving chamber, the stationary part being on the side defining the moving chamber

The wall is provided with at least one dust removing through hole, so that when the openings at the two ends of the movable cavity are closed, the dust removing through hole can be used for communicating the movable cavity with the outside, the dust catching glue is arranged on the base and is positioned on the surface of the base opposite to the movable part, and the dust removing through hole is arranged on the base.

9. The motor of claim 8, wherein the base has a plurality of dust removing through holes, and each dust removing through hole is uniformly distributed at four corners of the base.

10. The camera module comprises the motor as claimed in any one of claims 1-9, the camera module further comprises a lens holder, a lens, a color filter, a photosensitive chip and a circuit board, the photosensitive chip is arranged on the circuit board and is in conductive connection with the circuit board, the lens holder is arranged on the circuit board, the color filter is kept between the lens and the photosensitive chip through the lens holder, the motor is arranged on the lens holder, the camera module is characterized in that a lens mounting cavity with two open ends is defined by a moving part of the motor, the lens comprises a lens barrel connected with the inner wall of the lens mounting cavity and a plurality of lenses arranged in the lens barrel, the lens holder is provided with a second through hole for mounting the color filter and a lens holder upper end surface surrounding the second through hole, the lens holder upper end surface is provided with a first step and a second step arranged around the second through hole, the first step is radially adjacent to the second step, the lens barrel is provided with a second step and a supporting surface surrounding the second step, and the supporting surface is further provided with a supporting surface for supporting dust, and the lens is further limited by the supporting surface.

11. The camera module of claim 10, wherein a surface of the second step is at least 0.4mm above an upper surface of the color filter.

12. The camera module according to claim 10, wherein the second step is located inside the first step, a first light-passing hole for passing light is formed in the bottom of the fixed member, at least a portion of the first step is opposite to the first light-passing hole, and the width of the first step is not less than 0.3mm.

13. The camera module according to claim 12, wherein the second step extends to an edge of the second light-passing hole, or a boss is disposed on an upper end surface of the lens base around the edge of the second light-passing hole, and the boss is located inside the second step.

14. The camera module of claim 12, wherein the first step is a circular ring, the second step is a circular ring or a rectangular ring, or the first step and the second step are rectangular rings.

15. The camera module of claim 12, wherein the first step is divided into a plurality of independent step sections by the support surface.

16. The camera module of claim 12, wherein the first step is located inside the second step.

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