CN115473977A - Lens assembly, camera module and assembling method thereof - Google Patents
Lens assembly, camera module and assembling method thereof Download PDFInfo
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- CN115473977A CN115473977A CN202110654098.2A CN202110654098A CN115473977A CN 115473977 A CN115473977 A CN 115473977A CN 202110654098 A CN202110654098 A CN 202110654098A CN 115473977 A CN115473977 A CN 115473977A
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Abstract
The invention discloses a lens assembly, a camera module and an assembling method thereof. The camera module comprises a photosensitive assembly and a lens assembly. The lens assembly is correspondingly arranged on a photosensitive path of the photosensitive assembly, and the lens assembly comprises: a driving assembly, wherein the driving assembly has a space; the optical lens is arranged in the space of the driving component in a driving way and comprises a lens barrel and a lens group assembled in the lens barrel; a suspension mechanism, wherein the suspension mechanism repositionably suspends the optical lens in the space of the driving mechanism; and the buffer layer is correspondingly arranged on the outer side wall of the lens barrel of the optical lens, the driving assembly comprises a driving base frame for limiting the space and a coil and a magnetic element which are used for driving the optical lens and are oppositely arranged, and the coil is directly wound on the buffer layer so that the buffer layer is positioned between the coil and the outer side wall of the lens barrel.
Description
Technical Field
The invention relates to the technical field of lens modules, in particular to a lens assembly, a camera module and an assembling method thereof.
Background
In recent years, electronic products, smart devices, and the like are increasingly developed toward miniaturization and high performance, and this development trend of the electronic products and the smart devices places more severe requirements on the size and imaging capability of a camera module, which is one of standard configurations of the electronic products and the smart devices. This also causes the electronic product and smart machine trade to be no longer pursuing the compactness and the function integration of the module of making a video recording, and auto focus, zoom and anti-shake function are exactly integrated to the module of making a video recording in this kind of development wave to realize the auto focus of the module of making a video recording, zoom and anti-shake function.
At present, an existing camera module generally includes a photosensitive component, an optical lens, a voice coil motor and other important components, where the voice coil motor is used as a driving element of the camera module and is used for driving the optical lens in the camera module to move so as to achieve functions of auto-focusing, zooming, anti-shake and the like of the camera module. In fact, in the conventional industrial layout, the assembly process of the camera module is completed in the module factory, and the voice coil motor is provided in the form of a module by the module factory. That is, the motor base, the lens carrier, the spring, the coil magnet and other components in the voice coil motor are firstly assembled in a motor factory to form a modular structure, then the optical lens is mounted on the lens carrier of the voice coil motor in a module factory, and then the motor base of the voice coil motor is correspondingly mounted on the photosensitive assembly, so that the voice coil motor as a whole participates in the assembly process of the camera module.
However, such an assembly scheme has a number of drawbacks. On the one hand, along with the development of mobile electronic equipment, the module of making a video recording is more and more towards the direction of miniaturization, frivolousization, and this is more and more high to the size and the structural requirement of the module of making a video recording, but because voice coil motor exists in the module of making a video recording with a complete modular form, it is the variable that can hardly change in the size and the structural design of the module of making a video recording, so few module factories try to optimize the structure and the dimensional design of the module of making a video recording from the technical thinking of optimizing motor structure and integrated module assembly technology. On the other hand, the motor is used as a whole to participate in the assembly scheme of the camera module, so that the assembly process of the camera module is increased, and the assembly efficiency of the camera module is further reduced. For example, in the existing assembly scheme of the camera module, the motor needs to be cleaned, baked, cured and corrected by AA for many times, which reduces the assembly efficiency of the camera module and increases the assembly cost. In fact, just because the voice coil motor needs to be packaged into a standard module in a motor factory, the voice coil motor usually has a relatively closed structure, and once dust or dirt enters the inside of the motor, the dust and dirt are difficult to clean, and the overall cleanliness of the camera module is seriously affected. That is to say, as the voice coil motor of standard module, its inside clearance degree of difficulty is very high, and its inside dust and dirty also very easily pollute photosensitive assembly, and then influence the imaging quality of the module of making a video recording.
Disclosure of Invention
An advantage of the present invention is to provide a lens assembly, a camera module and an assembling method thereof, which can optimize the structural configuration of the module to eliminate a lens carrier in a motor, thereby improving the assembling efficiency of the camera module.
Another advantage of the present invention is to provide a lens assembly, a camera module and a method for assembling the same, wherein in an embodiment of the present invention, the camera module can integrate the assembly of the motor into the assembly process of the camera module, which is helpful for improving the integration level of the camera module and reducing the module size.
Another advantage of the present invention is to provide a lens module, a camera module and an assembling method thereof, wherein in an embodiment of the present invention, the camera module directly winds a coil around a buffer layer located outside a lens barrel to counteract a shrinkage force of the coil during a winding process, so that a shape of an optical lens is not affected, the camera module has a good imaging effect, and the optical lens can be protected to reduce a risk of scratching the lens barrel of the optical lens.
Another advantage of the present invention is to provide a lens assembly, a camera module and an assembling method thereof, wherein in an embodiment of the present invention, the camera module can directly suspend an optical lens in a space of a driving assembly through a suspension mechanism, so as to omit a lens carrier, thereby not only reducing material cost of the camera module and reducing assembly tolerance between the optical lens and the lens carrier, but also eliminating a height fixing process in a conventional packaging process and reducing a height of the camera module.
Another advantage of the present invention is to provide a lens assembly, a camera module and an assembling method thereof, wherein, in an embodiment of the present invention, the suspension mechanism of the camera module can reserve a sufficient space for the movement of the optical lens, so that a large movement stroke of the optical lens is ensured, and at the same time, the driving resistance of the optical lens is reduced, and the focusing or zooming sensitivity of the camera module is improved.
Another advantage of the present invention is to provide a lens assembly and a camera module and an assembling method thereof, wherein, in an embodiment of the present invention, the camera module can perform a non-standard process on a conventional standard modular motor to remove useless or replaceable components in the motor, so that the driving assembly and the optical lens can be integrally assembled together in a module factory, which not only can reduce the dirt effect caused by dust, but also is beneficial to the structural design and size optimization of the camera module.
Another advantage of the present invention is to provide a lens assembly and a camera module and a method for assembling the same, wherein no complex structure or algorithm is required in the present invention to achieve the above advantages. The present invention thus successfully and effectively provides a solution that not only provides a simple lens assembly and camera module and method of assembly thereof, but also increases the practicality and reliability of the lens assembly and camera module and method of assembly thereof.
To achieve at least one of the above advantages or other advantages and objects, the present invention provides a camera module including:
a photosensitive assembly; and
a lens assembly, wherein the lens assembly is correspondingly disposed on a photosensitive path of the photosensitive assembly, and the lens assembly includes:
a drive assembly, wherein the drive assembly has a space;
an optical lens, wherein the optical lens is drivably disposed in the space of the driving assembly, and the optical lens includes a lens barrel and a lens group assembled within the lens barrel;
a suspension mechanism, wherein the suspension mechanism repositionably suspends the optical lens from the space of the drive mechanism; and
the buffer layer is correspondingly arranged on the outer side wall of the lens barrel of the optical lens, the driving assembly comprises a driving base frame for limiting the space and a coil and a magnetic element which are used for driving the optical lens and are oppositely arranged, and the coil is directly wound on the buffer layer, so that the buffer layer is positioned between the coil and the outer side wall of the lens barrel.
In some embodiments of the invention, the buffer layer is made of a flexible material.
In some embodiments of the present invention, the outer sidewall of the lens barrel is provided with a seating groove, wherein the seating groove extends around an optical axis of the optical lens, and the buffer layer is disposed in the seating groove of the lens barrel.
In some embodiments of the present invention, the outer sidewall of the lens barrel is provided with a mount table, wherein the mount table integrally extends outward from the outer sidewall of the lens barrel, and the buffer layer is provided on the mount table of the lens barrel.
In some embodiments of the invention, the suspension mechanism includes a first elastic sheet and a second elastic sheet that are disposed at an interval on the driving assembly, wherein the first elastic sheet has a first coupling hole adapted to the light incident end of the optical lens to couple to the lens barrel of the optical lens, and the second elastic sheet has a second coupling hole adapted to the light emergent end of the optical lens to couple to the lens barrel of the optical lens.
In some embodiments of the invention, the first elastic sheet has at least one first outer profile fixedly connected to the driving base frame, at least one first inner profile defining the first engaging hole, and one or more first deformation portions integrally connected between the first outer profile and the first inner profile, and the first inner profile of the first elastic sheet is fixedly connected to the upper portion of the lens barrel.
In some embodiments of the invention, the second elastic piece has one or more second outer contours fixedly connected to the driving base frame, one or more second inner contours defining the second mating holes, and one or more second deformation portions integrally connected between the second outer contours and the second inner contours, wherein the second inner contours of the second elastic piece are fixedly connected to the lower portion of the lens barrel.
In some embodiments of the present invention, the driving base frame of the driving assembly includes a base and at least two brackets integrally extending upward from the base, wherein the first resilient piece and the second resilient piece of the suspension mechanism are mounted to the brackets of the driving base frame at intervals.
In some embodiments of the present invention, the coil is located between the first elastic sheet and the second elastic sheet, and the magnetic element is correspondingly disposed on the driving base frame.
In some embodiments of the invention, the driving assembly further includes at least two connection terminals disposed on the driving base frame, wherein two electrical connection points of the coil are electrically connected to the at least two connection terminals through the first resilient piece and/or the second resilient piece.
According to another aspect of the present invention, the present invention further provides an assembling method of a camera module, including the steps of:
providing an optical lens, wherein the optical lens comprises a lens barrel and a lens group assembled in the lens barrel;
arranging a buffer layer on the outer side wall of the lens cone, and directly winding the coil on the buffer layer;
the optical lens with the coil is repositionably suspended in a space of a driving assembly through a suspension mechanism to form a lens assembly, wherein a magnetic element of the driving assembly is arranged opposite to the coil mounted on the lens barrel; and
the lens assembly is correspondingly arranged on the photosensitive path of the photosensitive assembly to form a camera module.
In some embodiments of the present invention, in the step of disposing the buffer layer on the outer sidewall of the lens barrel and winding the coil directly on the buffer layer:
and applying glue or silica gel into the placing groove of the lens cone to solidify and form the buffer layer.
In some embodiments of the present invention, the step of repositionably suspending the optical lens with the coil in a space of a driving assembly by a suspension mechanism to form a lens assembly, wherein a magnetic element of the driving assembly is disposed opposite to the coil mounted on the lens barrel, comprises the steps of:
integrally forming a second outline part of a second elastic sheet of the suspension mechanism on a driving base frame of the driving assembly through an insert injection molding process;
after the optical lens with the coil is positively arranged in the space of the driving assembly, the second inner contour part of the second elastic sheet is bonded or hot riveted on the lower part of the lens cone of the optical lens;
oppositely arranging the magnetic element of the driving assembly on the driving pedestal of the driving assembly; and
and respectively bonding or hot riveting a first inner contour part and a first outer contour part of a first elastic sheet of the suspension mechanism on the upper part of the lens cone of the optical lens and a bracket of the driving base frame of the driving assembly to form the lens assembly.
In some embodiments of the present invention, the step of repositionably suspending the optical lens with the coil in a space of a driving assembly by a suspension mechanism to form a lens assembly, wherein a magnetic element of the driving assembly is disposed opposite to the coil mounted on the lens barrel, comprises the steps of:
fixedly connecting the first outline part of the first elastic sheet of the suspension mechanism to a bracket of a driving base frame of the driving component;
after the optical lens with the coil is inversely installed in the space of the driving assembly, the first inner contour part of the first elastic sheet is adhered or hot riveted on the upper part of the lens cone of the optical lens;
respectively bonding or hot riveting a second inner contour part and a second outer contour part of a second elastic sheet of the suspension mechanism to the lower part of the lens cone of the optical lens and the driving base frame; and
the magnetic element of the driving assembly is oppositely arranged on the driving base frame of the driving assembly to form the lens assembly.
In some embodiments of the present invention, the step of repositionably suspending the optical lens with the coil in a space of a driving assembly by a suspension mechanism to form a lens assembly, wherein a magnetic element of the driving assembly is disposed opposite to the coil mounted on the lens barrel, comprises the steps of: the method comprises the following steps:
integrally forming a first outline part of a first elastic sheet and a second outline part of a second elastic sheet of the suspension mechanism on a bracket of a driving base frame of the driving assembly through an insert injection molding process;
the optical lens with the coil is inversely arranged in the space of the driving component through the second sleeving connection hole of the second elastic sheet;
respectively bonding or hot riveting the first inner contour part of the first elastic sheet and the second inner contour part of the second elastic sheet to the upper part and the lower part of the lens cone of the optical lens; and
the magnetic element of the driving assembly is oppositely arranged on the driving pedestal of the driving assembly to form the lens assembly.
According to another aspect of the present invention, the present invention also provides a lens assembly comprising:
a drive assembly, wherein the drive assembly has a space;
an optical lens, wherein the optical lens is arranged in the space of the driving component in a driving way, and the optical lens comprises a lens barrel and a lens group assembled in the lens barrel;
a suspension mechanism, wherein the suspension mechanism repositionably suspends the optical lens from the space of the drive mechanism; and
the buffer layer is correspondingly arranged on the outer side wall of the lens barrel of the optical lens, the driving assembly comprises a driving base frame for limiting the space and a coil and a magnetic element which are used for driving the optical lens and are oppositely arranged, and the coil is directly wound on the buffer layer, so that the buffer layer is positioned between the coil and the outer side wall of the lens barrel.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.
Drawings
Fig. 1 is a schematic perspective view of a camera module according to an embodiment of the invention.
Fig. 2 shows a schematic cross-sectional view of the camera module according to the above-described embodiment of the present invention.
Fig. 3 shows an exploded view of the camera module according to the above embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of the lens assembly of the camera module according to the above embodiment of the invention.
Fig. 5 shows an exploded view of the lens assembly of the camera module according to the above embodiment of the present invention.
Fig. 6 shows an example of the coil in the lens assembly according to the above-described embodiment of the present invention.
Fig. 7 shows a modified example of the coil in the lens assembly according to the above-described embodiment of the present invention.
Fig. 8 shows a first modified embodiment of the suspension mechanism of the lens assembly according to the above embodiment of the present invention.
Fig. 9 shows a second variant implementation of the suspension mechanism of the lens assembly according to the above embodiment of the invention.
Fig. 10 shows a third variant implementation of the suspension mechanism of the lens assembly according to the above embodiment of the invention.
Fig. 11 is a flowchart illustrating an assembling method of a camera module according to an embodiment of the invention.
Fig. 12A and 12B respectively show a first example of the assembly steps of the lens assembly in the assembly method of the camera module according to the above-described embodiment of the present invention.
Fig. 13A and 13B respectively show a second example of the assembly steps of the lens assembly in the assembly method of the camera module according to the above-described embodiment of the present invention.
Fig. 14A to 14C respectively show a third example of the assembling steps of the lens assembly in the assembling method of the camera module according to the above-described embodiment of the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are by way of example only, and other obvious variations will occur to those skilled in the art. The underlying principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
In the present invention, the terms "a" and "an" are to be understood as meaning "one or more" in the claims and the description, that is, one element may be present in one embodiment, and another element may be present in plural in number. The terms "a" and "an" should not be construed as limiting the number unless such an element is explicitly recited in the disclosure as only one of the number and the number.
In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Summary of the application
As described in the background, with the development of science and technology, the image capturing module is increasingly developed toward large pixels, large apertures, light weight, thinness, and miniaturization, which has higher requirements on the size and structure of the image capturing module. In a conventional camera module packaging process, a module factory generally acquires parts such as a motor, a lens and a photosensitive chip respectively and packages the parts, so that a complete camera module is obtained. Because the motor, the lens and the photosensitive chip are provided by different suppliers respectively, and the respective technical fields are different, the required production environments are different, and the requirements for the products are inconsistent, the module factory needs to detect the quality of the parts respectively after obtaining the parts, and needs to make the parts cooperate with each other in the packaging process, so as to reduce the interference between the parts, that is, the traditional camera module packaging process is relatively complex, the chain length of the related upstream industry is long, and the cost of the camera module is increased due to redundant assembly processes and the parts.
In particular, the motor is relatively complex as a component of a camera module, but the manufacturing environment requires relatively low parts, and the dust-free grade of the manufacturing shop is relatively low, i.e. the shop environment contains much more dust than the manufacturing shop of the lens or the photosensitive chip. Therefore, when the module factory adopts traditional packaging technology, when the motor that the direct purchase equipment was accomplished from the motor factory carries out the encapsulation of the module of making a video recording, the dust that the motor carried can cause the eye of the module of making a video recording to pollute, even if wash the motor, nevertheless because the complexity of motor inner structure, the dust still can be hidden inside the motor, and in follow-up assembling process or the use of the module of making a video recording, these dusts can escape from the motor inside and fall on the lens of camera lens or the photosurface of sensitization chip, cause to have the black spot in the image that the module of making a video recording becomes, influence the formation of image quality of the module of making a video recording. In other words, the voice coil motor in the existing camera module exists as a complete module, which not only determines the variables that are almost unchangeable in the size and structural design of the camera module, resulting in that almost no module factory will try to optimize the structure and dimensional design of the camera module from the technical idea of optimizing the motor structure and assembly process, but also needs to perform multiple times of cleaning, baking, curing and AA correction on the modular motor during the module assembly process, resulting in the reduction of the assembly efficiency of the camera module, but also increases the assembly cost.
In addition, along with the mobile electronic device puts forward more and more strict requirements on the high power zooming function and the imaging quality of the camera module, the number of the lenses in the optical lens is more and more, and the weight of the optical lens is heavier, so that the driving sensitivity of the voice coil motor to the optical lens is poorer and poorer, the automatic focusing and the high power zooming of the camera module are delayed, and the use experience of a user is influenced. In order to solve this problem, most module factories have to select motors with larger driving force, but increasing the driving force of the motors not only means that the price of the motors is more expensive, but also increases the volume and weight of the motors, which is not favorable for the development of the camera module. Therefore, an optimized structural design scheme and an optimized assembly scheme of the camera module are needed.
Specifically, the technical idea of the present application is to perform non-standard processing on a conventional standard modular motor to remove useless or replaceable components in the motor, so that the driving assembly and the optical lens can be integrally assembled together in a module factory, which not only can reduce the dirt effect caused by dust, but also is beneficial to the structural design and size optimization of the camera module. More specifically, the inventors of the present application tried to remove the lens carrier in the motor module to obtain a carrier-less motor, and the carrier-less motor was involved in the assembly scheme of the camera module as a non-standard module, i.e. directly mounting the optical lens to the carrier-less motor to form a highly integrated lens assembly, which not only reduces the material cost of the camera module and the assembly tolerance between the optical lens and the lens carrier, but also eliminates the height fixing process in the conventional packaging process and reduces the height of the camera module. Therefore, the driving load of the motor can be reduced by omitting the lens carrier, so that the camera module can improve the sensitivity of the camera module in automatic focusing and high-power zooming without selecting the motor with larger driving force. Meanwhile, the overall weight and size of the finally assembled camera module can be reduced, and the motor is convenient to clean and the assembly efficiency of the camera module is optimized.
Based on this, the application provides a module of making a video recording that is prepared by integrated assembly process, it include the sensitization subassembly with be set up correspondingly in the lens subassembly in the sensitization route of sensitization subassembly, wherein the lens subassembly includes: a drive assembly having a space; an optical lens drivably disposed in the space of the driving assembly, and the optical lens includes a lens barrel and a lens group assembled inside the lens barrel; a suspension structure repositionably suspending the optical lens from the space of the drive assembly; and the buffer layer is correspondingly arranged on the outer side wall of the lens barrel of the optical lens, the driving assembly comprises a driving base frame for limiting the space and a coil and a magnetic element which are used for driving the optical lens and are oppositely arranged, and the coil is wound on the buffer layer, so that the buffer layer is positioned between the coil and the outer side wall of the lens barrel.
Based on this, this application still provides the manufacturing approach of a module of making a video recording, and it includes the step as follows: providing an optical lens, wherein the optical lens comprises a lens barrel and a lens group assembled in the lens barrel; arranging a buffer layer on the outer side wall of the lens cone of the optical lens; directly winding a coil on the buffer layer so that the buffer layer is positioned between the coil and the outer side wall of the lens cone; the optical lens is repositionably suspended in the space of a driving component through a suspension mechanism to form a lens component, wherein a magnetic element of the driving component is arranged opposite to the coil mounted on the lens cone; and correspondingly arranging the lens component on the photosensitive path of the photosensitive component to form a camera module.
It should be noted that the coil in the conventional motor is usually wound in the lens carrier, and in the technical scheme of the present application, after the lens carrier is omitted, if the coil is directly wound, that is, the coil is directly wound on the lens barrel of the optical lens, although the coil is fixed by hot air baking in the process of winding the coil, the coil is shrunk in the process, so that the shape of the optical lens is affected, and the imaging quality of the camera module is affected. Therefore, the camera module of this application adopts the coil with set up the buffer layer between the lens cone, promptly with the buffer layer set up in the lateral wall of lens cone earlier, will again the coil coiling in the buffer layer makes the buffer layer be located the lens cone with between the coil. Therefore, in the process of winding the coil, the buffer layer can buffer the contraction force of the coil, and further counteracts the extrusion force applied by the coil to the optical lens, so that the coil is prevented from deforming in the baking process and generating adverse effects on the optical lens.
Illustrative embodiments
Referring to fig. 1 to 6 of the drawings of the present specification, an embodiment of the present invention provides a camera module 1, where the camera module 1 may include a lens assembly 10 and a photosensitive assembly 20, where the lens assembly 10 is correspondingly disposed on a photosensitive path of the photosensitive assembly 20, so that external light firstly passes through the lens assembly 10 and then is received by the photosensitive assembly 20 for imaging. Specifically, the lens assembly 10 includes a driving assembly 11 having a space 110, an optical lens 12 drivably disposed in the space 110 of the driving assembly 11, a suspension structure 13 suspending the optical lens 12 to the space 110 of the driving assembly 11 in a resettable manner, and a buffer layer 14 correspondingly disposed on an outer side wall of the lens barrel 121 of the optical lens 12. The optical lens 12 includes a lens barrel 121 and a lens group 122 assembled in the lens barrel 121. The driving assembly 11 includes a driving base 111 defining the space 110, and a coil 112 and a magnetic element 113 oppositely disposed for driving the optical lens 12, and the coil 112 is directly wound on the buffer layer 14, so that the buffer layer 14 is located between the coil 112 and the outer sidewall of the lens barrel 121.
It should be noted that the coil 112 of the driving assembly 11 is generally formed by winding enameled wire, which shrinks when it is shaped by hot air baking during the winding process. If the coil 112 is directly wound around the lens barrel 121 of the optical lens 12, the coil 112 will press the lens barrel 121 to deform the optical lens 12, so as to affect the imaging effect thereof, but in the image pickup module 1 of the present application, the buffer layer 14 is disposed on the outer side wall of the lens barrel 121, and then the coil 112 is directly wound around the buffer layer 14, so that the buffer layer 14 is located between the lens barrel 121 and the coil 112, and the pressing force applied by the coil 112 to the lens barrel 121 of the optical lens 12 is counteracted by the buffering effect of the buffer layer 14, so as to avoid the adverse effect on the optical lens 12 caused by the deformation of the coil 112 in the baking process. Meanwhile, since the buffer layer 14 covers the outer sidewall of the lens barrel 121, the buffer layer 14 can protect the optical lens 12, so as to reduce the risk of scratching the optical lens 12.
Illustratively, the buffer layer 14 of the lens assembly 10 is made of a flexible material, so as to counteract deformation of the coil 112 during baking through the deformability of the buffer layer 14, reduce a pressing force applied to the lens barrel 121 of the optical lens 12 due to shrinkage deformation of the coil 112, avoid deformation of the optical lens 12 due to baking deformation of the coil 112, and ensure that the camera module 1 has good imaging quality.
Preferably, the buffer layer 14 is cured by glue or silicone applied to the outer sidewall of the lens barrel 121. Of course, in other examples of the present application, the buffer layer 14 may also be made of a flexible material such as a polymer material or a coating.
More preferably, as shown in fig. 6, the outer sidewall of the lens barrel 121 is provided with a disposition groove 1211, wherein the disposition groove 1211 extends around the optical axis of the optical lens 12, and the buffer layer 14 is disposed in the disposition groove 1211 of the lens barrel 121, so as to avoid an additional increase in size of the lens assembly 10 due to the disposition of the buffer layer 14. Meanwhile, since the buffer layer 14 is located in the disposing groove 1211, the buffer layer 14 can be firmly disposed on the outer side wall of the lens barrel 121, and therefore the camera module 1 can effectively avoid the generation of dirt due to the falling off of the buffer layer 14.
Accordingly, the magnetic element 113 of the driving assembly 11 may be, but is not limited to, implemented as a magnet made of ru-fe-b, wherein the magnetic element 113 is suitable to be disposed at four sides or four corners of the driving base frame 111. For example, in this example of the present application, as shown in fig. 6, the number of the coils 112 is one, and the coils 112 are implemented as hollow ring-wound coils 1121 so as to be circumferentially provided on the peripheral side of the lens barrel 121; correspondingly, the number of the magnetic elements 113 may be one or more than one pair, and the magnetic elements 113 are symmetrically disposed on the driving base frame 111. Thus, when the coil 112 is energized to generate an electromagnetic force with the magnetic element 113, the optical lens 12 is subjected to a symmetrical driving force, thereby making the movement of the optical lens 12 more smooth.
It is noted that, in a modified example of the present application, as shown in fig. 7, a mounting table 1212 may be further disposed on the outer sidewall of the lens barrel 121, wherein the mounting table 1212 integrally extends outward from the outer sidewall of the lens barrel 121, and the buffer layer 14 is disposed in the mounting table 1212 of the lens barrel 121, so as to directly wind the coil 112 around the buffer layer 14, so that the coil 112 is located at a side of the lens barrel 121. Preferably, in this example of the present application, the coil 112 may be implemented as two or more air core planar coils 1122, and the air core planar coils 1122 are symmetrically disposed around the optical lens 12.
According to the above embodiment of the present application, as shown in fig. 2 and fig. 5, the suspension mechanism 13 includes a first elastic piece 131 and a second elastic piece 132 disposed at an interval in the optical axis direction of the driving assembly 11, wherein a first coupling hole 1310 of the first elastic piece 131 is adapted to the light-in end 1201 of the optical lens 12 to couple to the lens barrel 121 of the optical lens 12, and a second coupling hole 1320 of the second elastic piece 132 is adapted to the light-out end 1202 of the optical lens 12 to couple to the lens barrel 121 of the optical lens 12, wherein the size of the second coupling hole 1320 of the second elastic piece 132 is larger than the size of the first coupling hole 1310 of the first elastic piece 131.
It should be noted that, since the outer contour of the lens barrel 121 of the optical lens assembly 12 generally matches the size of the lens group 122 assembled therein, so that the size of the light-entering end 1201 of the optical lens assembly 12 is smaller than the size of the light-exiting end 1202 of the optical lens assembly 12, the first coupling hole 1310 of the first elastic sheet 131 in the suspension mechanism 13 of the lens assembly 10 of the present application is smaller than the second coupling hole 1320 of the second elastic sheet 132, so as to be directly fixed to the lens barrel 121 of the optical lens assembly 12, which is helpful to improve the structural integrity of the lens assembly 10 and reduce the overall weight and size of the camera module 1. In other words, the driving component 11 and the suspension mechanism 13 in the camera module 1 of the present application are equivalent to a carrier-free motor, i.e. the lens component 10 of the camera module 1 omits a lens carrier in a conventional motor, and the optical lens 12 is directly mounted on the suspension mechanism 13 during the module assembling process, so as to optimize the assembling efficiency of the camera module and reduce the size of the camera module.
Exemplarily, as shown in fig. 5, the first resilient tab 131 of the suspension mechanism 13 has a first profile 1311 fixed to the driving base frame 111, a first inner profile 1312 defining the first coupling hole 1310, and a first deformation 1313 integrally connected between the first profile 1311 and the first inner profile 1312, wherein the first inner profile 1312 of the first resilient tab 131 is fixedly connected to an upper portion of the lens barrel 121 of the optical lens 12, and the first deformation 1313 of the first resilient tab 131 extends inward from the first profile 1311 to protrude into the space 110 of the driving base frame 111, so that the first inner profile 1311 of the first resilient tab 131 is suspendedly disposed in the space 110 of the driving assembly 11. It is understood that the first inner profile 1312 of the first elastic sheet 131 may be fixedly attached to the lens barrel 121 by means of, but not limited to, such as adhesion or hot riveting.
In this way, the first inner contour 1311 fixed to the first elastic sheet 131 can hold the optical lens 12 in the space 110 of the driving assembly 11 in a suspended manner, so as to reserve a certain moving space for the optical lens 12 and provide a restoring force by using the deformation of the first deformation 1313 of the first elastic sheet 131. In other words, when an electromagnetic force is generated between the coil 112 and the magnetic element 113, the optical lens 12 is driven to move, and the first deformation portion 1313 of the first elastic sheet 131 is elastically deformed to accumulate an elastic force; when the electromagnetic force between the coil 112 and the magnetic element 113 is removed, the first deformation portion 1313 of the first elastic sheet 131 releases the elastic force, so that the optical lens 12 is restored to the original position.
Accordingly, the second resilient plate 132 of the suspension mechanism 13 has a second outer contour 1321 fixed to the driving base frame 111, a second inner contour 1322 defining the second docking hole 1320, and a second deformation 1323 integrally connected between the second outer contour 1321 and the second inner contour 1322, wherein the second inner contour 1322 of the second resilient plate 132 is fixedly connected to a lower portion of the lens barrel 121 of the optical lens 12, and the second deformation 1323 of the second resilient plate 132 extends inward from the second outer contour 1321 to extend into the space 110 of the driving base frame 111, so that the second inner contour 1321 of the second resilient plate 132 is disposed in the space 110 of the driving assembly 11 in a suspended manner. It is understood that the second inner contour 1322 of the second elastic sheet 132 may be fixedly attached to the lens barrel 121 by, but not limited to, means such as bonding or hot riveting. In addition, the first elastic sheet 131 and the second elastic sheet 132 of the suspension mechanism 13 are respectively and fixedly connected to the upper portion and the lower portion of the lens barrel 121, so as to vertically support and vertically limit the lens barrel 121 of the optical lens 12, which helps to improve the structural stability of the lens assembly 10, so that the optical lens 12 is stably suspended in the space 110 of the driving assembly 11, and thus the optical lens 12 is stably maintained in the photosensitive path of the photosensitive assembly 20.
In other words, in order to fit the shape of the optical lens 12 with a small top and a large bottom, that is, the size of the light-in end 1201 of the optical lens 12 is smaller than the size of the light-out end 1202 of the optical lens 12, the first attachment hole 1310 of the first elastic sheet 131 in the camera module 1 of the present application has a smaller aperture to fit the light-in end 1201 of the optical lens 12, and the second attachment hole 1320 of the second elastic sheet 132 has a larger aperture to fit the light-out end 1202 of the optical lens 12, so as to stably dispose the optical lens 12 between the first elastic sheet 131 and the second elastic sheet 132, so that the optical lens 12 is kept in the center, and the optical lens 12 can be restored to the original position by the elastic force of the first elastic sheet 131 and the second elastic sheet 132 after the optical lens 12 is moved.
In the above example of the present application, the whole of the first elastic sheet 131 of the suspension mechanism 13 is a sheet-like structure, and the first deformation portion 1313 of the first elastic sheet 131 extends from the first outer contour 1311 to the first inner contour 1312 in a bending manner, so as to reserve a sufficient space for the movement of the optical lens 12, so that a large movement stroke of the optical lens 12 is ensured, the driving resistance of the optical lens 12 is reduced, and the focusing or zooming sensitivity of the camera module 1 is improved. It can be understood that, when the length of the first deformation portion 1313 is longer, that is, the bending of the first deformation portion 1313 is more, the deformation of the first deformation portion 1313 itself after the deformation is generated is small, so that it is easier to be restored after being stretched.
It should be noted that the thickness of the first elastic sheet 131 of the suspension mechanism 13 is usually between 30um and 60um, so that the first elastic sheet 131 has better elasticity. It can be understood that the first deformation 1313 of the first elastic sheet 131 can be, but is not limited to be, implemented as at least two springs located between the first outer profile 1311 and the first inner profile 1312 and connecting the first outer profile 1311 and the first inner profile 1312, such that when the optical lens 12 is displaced under the action of the electromagnetic force between the coil 112 and the magnetic element 113, the first deformation 1313 of the first elastic sheet 131 is driven to generate a reaction damping force balanced with the electromagnetic force, so that the optical lens 12 is stably held at a certain position on the photosensitive path of the photosensitive assembly 20, thereby achieving auto-focusing or zooming of the camera module 1.
Preferably, the first deformation 1313 of the first resilient sheet 131 extends integrally from the first outer contour 1311 to the first inner contour 1312, that is, the first resilient sheet 131 is integrally formed.
More preferably, the first elastic sheet 131 has an integrated structure, which is helpful to improve the flatness of the first elastic sheet 131. For example, as shown in fig. 5, the first inner profile 1312 of the first elastic sheet 131 has a ring structure to define the first coupling hole 1310 with a fixed size, so as to be fixedly coupled to the lens barrel 121 of the optical lens 12. Optionally, the first outer contour 1311 of the first elastic sheet 131 may also have an annular structure, so as to further improve the overall flatness of the first elastic sheet 131, facilitate reducing the tilt tolerance of the optical lens 12, and improve the assembly precision of the module. Of course, in other examples of the present application, the first profile 1311 of the first elastic sheet 131 may also have a segment structure, that is, the first profile 1311 may include two or more partial profiles, and still be capable of being fixedly connected to the driving base frame 111 of the driving assembly 11, so as to suspend the first profile 1312 from the space 110 of the driving assembly 11.
It should be noted that, according to the above example of the present application, the second elastic sheet 132 of the suspension mechanism 13 is similar to the first elastic sheet 131, and the whole of the second elastic sheet 132 is also in a sheet structure, and the second deformation portion 1323 of the second elastic sheet 132 extends from the second outer contour portion 1321 to the second inner contour portion 1322 in a bending manner, and also reserves a sufficient space for the movement of the optical lens 12, so that the large movement stroke of the optical lens 12 is ensured, the driving resistance of the optical lens 12 is reduced, and the focusing or zooming sensitivity of the camera module 1 is improved.
Preferably, the second resilient sheet 132 has a split structure, so as to simplify the assembly difficulty of the lens assembly 10, and at the same time, the conductive performance of the second resilient sheet 132 can be utilized to be electrically connected to the coil 112, so as to transmit electric energy to the coil 112 through the second resilient sheet 132. For example, as shown in fig. 5, the second elastic sheet 132 includes two half elastic sheets 132a, 132b, that is, the second inner profile 1322 of the second elastic sheet 132 includes two half inner profiles 1322a, 1322b having an arc structure, so as to enclose the second attachment hole 1320 by the two half inner profiles 1322a, 1322 b. Meanwhile, the second contour 1321 may include two pairs of partial contours 1321a, 1321b, and the second deformation 1323 includes two pairs of spring wires 1323a, 1323b, respectively, wherein each pair of the partial contours 1321a or 1321b is integrally connected with the corresponding half inner contour 1322a or 1322b through the spring wire 1323a or 1323b, respectively, to form two half spring pieces 132a, 132b. Thus, the partial outlines 1321a, 1321b of the half elastic pieces 132a, 132b are respectively fixed to the driving base frame 111 of the driving assembly 11, and the half inner outlines 1322a, 1322b of the half elastic pieces 132a, 132b are respectively fixed to the lens barrel 121 of the optical lens 12, so as to stably suspend the optical lens 12 in the space 110 of the driving assembly 11.
It should be noted that, since the second elastic plate 132 has a split structure, that is, includes two separated half elastic plates 132, before the half inner profiles 1322a and 1322b of the half elastic plates 132a and 132b are fixed to the lens barrel 121, the size of the second attachment hole 1320 surrounded by the two half inner profiles 1322a and 1322b can be changed, so that a thicker portion of the lens barrel 121 of the optical lens 12 can pass through the second attachment hole 1320, and the optical lens 12 is assembled in the space 110 of the driving assembly 11 by a flip-chip process, which helps reduce the assembly difficulty of the lens assembly 10. Meanwhile, the two half spring pieces 132a and 132b may be respectively connected to two ends of the coil 112 in an electrically conductive manner, so as to supply an operating current to the coil 112, so that an electromagnetic force is generated between the coil 112 and the magnet 113, and the optical lens 12 is driven to move. It can be understood that, when the length of the first deformation portion 1313 is longer, that is, the bending of the first deformation portion 1313 is more, the deformation of the first deformation portion 1313 itself after the deformation is small, so that it is easier to be restored after being stretched.
Of course, in the first modified embodiment of the present application, as shown in fig. 8, the first elastic sheet 131 may have a split structure, and the second elastic sheet 132 may have an integrated structure; alternatively, in the second variant embodiment of the present application, as shown in fig. 9, the first elastic sheet 131 and the second elastic sheet 132 may have an integral structure at the same time; in a third modified embodiment of the present invention, as shown in fig. 10, the first resilient piece 131 and the second resilient piece 132 may have a split structure.
According to the above embodiment of the present application, the coil 112 of the driving assembly 11 is wound around the lens barrel 121 of the optical lens 12 via the buffer layer 14, and the magnetic element 113 of the driving assembly 11 is generally correspondingly disposed on the driving base frame 111, so that under the action of the electromagnetic force generated by the magnetic element 113 when the coil 112 is energized, the optical lens 12 moves relative to the driving base frame 111, thereby achieving the auto-focusing or auto-zooming of the camera module 1.
Preferably, the positioning groove 1211 on the lens barrel 121 of the optical lens 12 is located between the first elastic sheet 131 and the second elastic sheet 132, so that the coil 112 wound around the buffer layer 14 is located between the first elastic sheet 131 and the second elastic sheet 132.
Illustratively, the driving assembly 11 may further include at least two terminals 114 adapted to be electrically connectable with a power supply device, wherein the at least two terminals 114 are correspondingly disposed on the driving base frame 111, and the at least two terminals 114 are electrically connectable with the two half resilient pieces 132a and 132b of the second resilient piece 132 disposed on the lens barrel 121, respectively, so as to provide working electric energy for the coil 112 through the power supply device via the terminals 114 and the second resilient piece 132, so that the driving assembly 11 provides a driving force for the optical lens 12.
Preferably, the at least two connection terminals 114 are located on the same side of the driving base frame 111, so that the at least two connection terminals 114 and the circuit board 21 of the photosensitive assembly 20 can be electrically soldered on the same side without adjusting the orientation of the soldering equipment, which helps to simplify the assembly process and improve the assembly efficiency.
In an example of the present application, the driving base frame 111 of the driving assembly 11 may be, but is not limited to, manufactured by an injection molding process. Preferably, as shown in fig. 2 to 5, the driving base frame 111 includes a base 1111 and at least two brackets 1112 extending upward integrally from the base 1111, wherein the first elastic piece 131 and the second elastic piece 132 of the suspension mechanism 13 are mounted to the at least two brackets 1112 of the driving base frame 111 at intervals, so that the first elastic piece 131 and the second elastic piece 132 of the suspension mechanism 13 are mounted on the same member, which helps to improve parallelism between the first elastic piece 131 and the second elastic piece 132, and facilitates stably suspending the optical lens 12. Meanwhile, since the first contour 1311 of the first resilient plate 131 and the second contour 1321 of the second resilient plate 132 are fixed to the at least two brackets 1112 at intervals, respectively, there is a predetermined gap between the second deformable portion 1323 of the second resilient plate 132 and the base 1111, so as to prevent the base 1111 from blocking the deformation of the second deformable portion 1323 of the second resilient plate 132, and to reserve a sufficient space for the movement of the optical lens 12.
Optionally, the first profile 1311 of the first elastic piece 131 and/or the second profile 1321 of the second elastic piece 132 may be fixed to the at least two brackets 1112 of the driving base frame 111 by bonding or hot riveting. Of course, in other examples of the present application, the second contour 1311 of the first resilient piece 131 and/or the second contour 1321 of the second resilient piece 132 may also be integrally formed on the at least two brackets 1112 of the driving base frame 111 by insert molding, and still achieve the fixing purpose.
According to the above embodiment of the present application, the driving assembly 11 may further include an outer housing 115, wherein the outer housing 115 is sleeved on the driving base frame 111, and the outer housing 115 has an opening 1150 corresponding to the optical lens 12. It is understood that the optical lens 12 can participate in the assembly process of the camera module 1 before the outer housing 115, that is, in the embodiment of the present application, after the outer housing 115 is assembled outside the driving base frame 111, the optical lens 12 does not need to be installed in the space 110 of the driving assembly 11 through the opening 1150, and therefore, the aperture of the opening 1150 of the outer housing 115 can be reduced to be smaller than the size of the light emitting end 1202 of the optical lens 12.
It should be noted that the outer casing 115 of the driving assembly 11 is made of a metal material, such as a cold-rolled carbon steel Sheet (SPCC) or a magnetic conductive material such as stainless steel, so as to have a certain magnetic conductive function and strengthen the magnetic field. It should be understood that, after the aperture of the opening 1150 is reduced, it is not only beneficial to prevent external dust, dirt or stray light from entering the inside of the camera module 1, but also can prevent magnetic leakage from causing interference with an external magnetic field.
According to the above embodiment of the present application, as shown in fig. 2, the photosensitive assembly 20 of the camera module 1 may include a circuit board 21, a photosensitive chip 22, a bracket 23, and a filter element 24, wherein the circuit board 21 serves as a mounting substrate of the photosensitive assembly 20. Specifically, the photosensitive chip 22 is electrically connected to the circuit board 21 (for example, in an example, the photosensitive chip 22 is mounted on an upper surface of the circuit board 21 and electrically connected to the circuit board 21 by means of gold wire bonding), so as to provide the control circuit and the electric power required by the operation of the photosensitive chip 12 through the circuit board 11.
The support 23 is formed on the circuit board 21 for supporting other components, wherein the support 23 has an optical window corresponding to at least a photosensitive region of the photosensitive chip 22. In other words, the driving base frame 111 of the lens assembly 10 is supported by the bracket 23, and the lens set 122 of the lens assembly 10 is correspondingly retained in the light sensing path of the light sensing chip 22, so that the external light firstly passes through the lens set 122 and then propagates to the light sensing chip 22 to be received.
For example, in one particular example of the present application, the bracket 23 is implemented as a separately molded plastic bracket that is attached to the surface of the circuit board 21 by an adhesive and is used to support other components. Of course, in other examples of the present application, the bracket 23 can also be formed on the circuit board 21 in other manners, for example, the bracket 23 is implemented as a molded bracket, which is integrally formed on a predetermined position of the circuit board 21 by a molding process.
Further, in some specific examples of the present application, the filter element 24 may be mounted on the bracket 23, so that the filter element 24 is kept on a photosensitive path of the photosensitive chip 22, so that, in a process that external light passes through the filter element 24 to reach the photosensitive chip 22, stray light in the external light can be filtered by the filter element 24 to improve imaging quality. It is worth mentioning that in other examples of the present application, the filter element 24 can also be mounted on the bracket 23 in other ways, for example, the filter element 24 can be indirectly mounted on the bracket 23 through other supports. Of course, in other examples of the present application, the filter element 24 can also be installed at other positions of the image capturing module, for example, the filter element 24 is formed in the optical lens 12 (for example, as a layer of filter film attached to a surface of a certain optical lens of the optical lens 12), which is not described in detail herein.
It should be noted that, since the buffer layer 14 needs to be disposed between the coil 112 and the lens barrel 121 of the optical lens 12 in the camera module 1 of the present application in order to avoid the deformation of the optical lens 12 caused by the shrinkage of the coil 112 during the baking process, the present application further provides an assembling method of the camera module to assemble the camera module 1. Specifically, as shown in fig. 11, according to an embodiment of the present application, the method for assembling the camera module may include:
s100: providing an optical lens 12, wherein the optical lens 12 comprises a lens barrel 121 and a lens group 122 assembled in the lens barrel 121;
s200: arranging a buffer layer 14 on the outer side wall of the lens barrel 121, and directly winding the coil 112 on the buffer layer 14;
s300: the optical lens 12 with the coil 112 is repositionably suspended in the space 110 of the driving assembly 11 by a suspension mechanism 13 to form the lens assembly 10, wherein the magnetic element 113 of the driving assembly 11 is disposed opposite to the coil 112 mounted on the lens barrel 121; and
s400: the lens assembly 10 is disposed on the photosensitive path of the photosensitive assembly 20 correspondingly to form the camera module 1.
It should be noted that in the step S200 of the method for assembling the camera module of the present application, the buffer layer 14 is made of a flexible material. Preferably, glue or silicone is applied to the lens barrel 121 in the seating groove 1211 to cure and form the buffer layer 14.
It should be noted that in the first example of the present application, as shown in fig. 12A, the step S300 of the method for assembling an image pickup module may include the steps of:
s311: integrally forming the second outer contour 1321 of the second elastic sheet 132 of the suspension mechanism 13 on the driving base frame 111 of the driving assembly 11 by an insert molding process;
s312: after the optical lens 12 with the coil 112 is mounted in the space 110 of the driving assembly 11, the second inner contour 1322 of the second elastic piece 132 is bonded or heat-staked to the lower portion of the lens barrel 121 of the optical lens 12;
s313: oppositely arranging the magnetic element 113 of the driving assembly 11 on the driving base frame 111 of the driving assembly 11; and
s314: the first inner profile 1312 and the first outer profile 1311 of the first elastic sheet 131 of the suspension mechanism 13 are respectively bonded or heat staked to the upper portion of the lens barrel 121 of the optical lens 12 and the bracket 1112 of the driving base 111 of the driving assembly 11 to form the lens assembly 10.
It is understood that, in this example of the present application, the second elastic piece 132 of the lens assembly 10 and the driving base frame 111 of the driving assembly 11 are integrally formed by an insert molding process, and the second profile 1311 of the second elastic piece 132 is preferably located above the driving base frame 111.
Specifically, as shown in fig. 12B, first, a base 1111 of the drive base frame 111 is obtained, wherein at least two connection terminals 114 are disposed on the base 1111, and the at least two connection terminals 114 are preferably located on the same side of the base 1111, so as to facilitate the soldering of the at least two developed terminals 114 with the circuit board 21 of the photosensitive assembly 20. Optionally, the at least two connection terminals 114 are adapted to be integrally formed with the base 1111 through an insert molding process.
Preferably, the wire terminal 114 includes a lower end portion 1141 and an upper end portion 1142 integrally extending from the lower end portion 1141, wherein the wire terminal 114 is insert-molded fixed in the base 1111, and the lower end portion 1141 of the wire terminal 114 is partially exposed for electrical connection with the circuit board 21, and a top surface of the upper end portion 1142 of the wire terminal 114 is exposed for electrical connection with the second dome 132 or other energizing element. It can be understood that, since it is necessary to keep the top surface of the upper end portion 1142 of the terminal 114 exposed and to support the bottom surface of the upper end portion 1142 of the terminal 114 by a support portion of an injection mold during the insert molding process, the base 1111 of the driving base bracket 111 has a groove at a position corresponding to the upper end portion 1141 so that the bottom surface of the upper end portion 1142 of the terminal 114 is exposed.
Next, the second resilient piece 132 is flatly placed on the base 1111, and the two half resilient pieces 132a and 132b of the second resilient piece 132 are electrically connected to the at least two connection terminals 114 through a conductive adhesive or a welding method, so as to integrally form at least two brackets 1112 on four corner regions of the base 1111 and at least a partial region of the second outer contour 1321 of the second resilient piece 132 through an injection molding process, that is, at least a partial region of the second outer contour 1321 of the second resilient piece 132 is embedded between the base 1111 and the brackets 1112, so that the second resilient piece 132 is fixed on the driving base 111 through an insert injection molding method. It is understood that, since the base 1111 of the driving base 111 is an injection molded part, a flat mounting surface can be provided for the second resilient plate 132, and the at least two brackets 1112 formed by injection molding can also provide a flat mounting surface for the first resilient plate 131, when the first profile 1311 of the first resilient plate 131 is fixed to the at least two brackets 1112, a better parallelism between the first resilient plate 131 and the second resilient plate 132 can be maintained.
Preferably, the press-fit side of the second profile 1321 of the second resilient tab 132 provides a desired mold press-fit position during injection molding, so that after the second resilient tab 132 and the driving base frame 111 are integrally molded, the press-fit side of the second profile 1321 of the second resilient tab 132 is exposed outside the driving base frame 111, so that the second profile 1321 of the second resilient tab 132 is partially wrapped in the driving base frame 111.
Then, the optical lens 12 with the coil 112 is installed in the space 110 of the driving assembly 11, that is, the lens barrel 121 of the optical lens 12 is first placed on the second elastic sheet 132, and then the lower portion of the lens barrel 121 of the optical lens 12 is fixedly connected to the second inner contour 1322 of the second elastic sheet 132.
Then, the first inner contour 1312 of the first elastic piece 131 is fixedly connected with the upper part of the lens barrel 121 of the optical lens 12, and the first outer contour 1311 of the first elastic piece 132 is fixedly mounted on the upper surfaces of the at least two brackets 1112. It is understood that the first profile 1311 of the first elastic sheet 132 may be fixed to the at least two brackets 1112 by gluing, or may be fixedly connected by hot riveting through riveting holes of the first profile 1311 and riveting posts of the at least two brackets 1112.
Preferably, an upper end surface of the lens barrel 121 of the optical lens 12 is higher than a top surface of the first inner contour 1312 of the first elastic sheet 131, and a lower end surface of the lens barrel 121 is lower than a bottom surface of the second inner contour 1322 of the second elastic sheet 132, so that the first elastic sheet 131 and the second elastic sheet 132 do not directly collide with other components, thereby avoiding a risk of damage to the first elastic sheet 131 and the second elastic sheet 132.
Finally, the magnetic elements 113 are correspondingly mounted on four sides or four corners of the driving base frame 111 of the driving assembly 11 to form the lens assembly 10.
Preferably, a distance between the first inner contour 1312 of the first elastic piece 131 and the second inner contour 1322 of the second elastic piece 132 is greater than a height of the coil 112, so as to provide a mounting space for the coil 112 on the lens barrel 121.
More preferably, the height of the first profile 1311 of the first resilient tab 131 may be higher than the height of the first inner profile 1312 so as to increase the driving stroke of the driving assembly 11. Optionally, the height of the second profile 1321 of the second elastic sheet 132 may also be lower than the height of the second profile 1322, so as to increase the driving stroke of the driving assembly 11.
In this example, the second elastic sheet 132 includes two half elastic sheets 132a, 132b, wherein half outer contours 1321a, 1321b of the two half elastic sheets 132a, 132b are respectively connected to the two terminals 114 in an electrically conductive manner, and half inner contours 1322a, 1322b of the two half elastic sheets 132a, 132b are connected to two electrical connection points of the coil 112 in an electrically conductive manner, and simultaneously, the two terminals 114 are connected to the circuit board 21 of the photosensitive assembly 20 in an electrically conductive manner, so that current is provided to the coil 112 through the second elastic sheet 132 to drive the optical lens 12 to move up or down under the action of electromagnetic force generated between the coil 112 and the magnetic element 113.
Of course, in other examples of the present application, the second resilient tab 132 may also be directly attached to the base 1111 of the driving base frame 111, that is, the second outer contour portion 1321 of the second resilient tab 132 may be adhered and fixed to four corner regions of the base 1111 by glue, or the second resilient tab 132 may also be fixed by thermal riveting through a riveting hole located on the second outer contour portion 1321 and a riveting column located on the four corner regions of the base 1111.
It is understood that, although the second elastic piece 132 in the above examples of the present application has a split structure to conduct a circuit for the coil 112 through the second elastic piece 132, the first elastic piece 131 may have an integrated structure, or may have a split structure.
It should be noted that, in other examples of the present application, the second elastic piece 132 may also have an integrated structure, so that when the second elastic piece 132 is mounted on the driving pedestal 111, the second elastic piece 132 can maintain a better consistency, so that the entire plane of the second elastic piece 132 can be mounted on the base 1111 with a smaller tilt tolerance, and the assembly precision of the lens assembly 10 is ensured after the second elastic piece 132 is insert-molded on the driving pedestal 111.
Of course, when the second elastic piece 132 has an integrated structure, the two electrical connection points of the coil 112 cannot be electrically connected to the second elastic piece 132 at the same time, so that when the first elastic piece 131 has an integrated structure, the two electrical connection points of the coil 112 can be electrically connected to the first elastic piece 131 and the second elastic piece 132, respectively, so as to achieve the circuit conduction of the coil 112; or, when the first elastic sheet 131 has a split structure, the two electrical connection points of the coil 112 can be electrically connected to the first elastic sheet 131, and the circuit of the coil 112 can still be conducted. It can be understood that, when the first elastic sheet 131 is split, the two connection terminals 114 extend upward to be connected to the first elastic sheet 131. Preferably, the two terminals 114 extend upward from at least two support posts 1112, and are welded to the first profile 1311 of the first resilient tab 131. Especially, when the first elastic piece 131 is insert molded (insert molding), if the first elastic piece 131 is split, the two connection terminals 114 need to be extended upward to the first contour 1311 of the first elastic piece 131, and then the integral injection molding is performed.
It should be noted that, when the second elastic piece 132 has a split structure, the two half elastic pieces 132 of the second elastic piece 132 are difficult to be kept on the same plane due to being separated from each other, and especially when the second elastic piece 132 is integrally formed by an insert injection molding process, the overall flatness of the second elastic piece 132 is more difficult to be guaranteed, which results in an increase in the tilt tolerance of the optical lens 12. In order to solve the problem, as shown in fig. 12B, before the second elastic piece 132 is mounted, the two half elastic pieces 132a and 132B of the second elastic piece 132 are integrally connected through a bridge 133, so that the consistency of the second elastic piece 132 in the mounting process is improved; after the second elastic piece 132 is mounted, the bridge 133 is cut off to be sleeved on the lens barrel 121 of the optical lens 12. It is understood that the second resilient tab 132 may be directly fixed to the driving base 111 by means of bonding, welding or heat riveting, or the second resilient tab 132 may be embedded in the driving base 111 by means of insert molding.
In other words, before the second elastic sheet 132 is mounted, the half inner contours 1322a, 1322b of the two half elastic sheets 132a, 132b of the second elastic sheet 132 and the bridge 133 are integrally formed to form an elastic sheet with a bridge, so that the second elastic sheet 132 with a split structure is integrally mounted first, thereby improving the mounting smoothness and reducing the decrease in the consistency between the two half elastic sheets 132a, 132b of the second elastic sheet 132 during the insert molding process of the second elastic sheet 132; after the second elastic sheet 132 is mounted, the bridge 133 may be cut off by, for example, laser cutting, so as to obtain two separated half elastic sheets 132a and 132b. It can be understood that when the bridge 133 is cut by using the laser cutting method, the portion of the second inner contour 1322 of the second elastic sheet 132, which is originally connected to the bridge 133, has a cutting trace. Of course, when the first elastic sheet 131 also has a split structure, the first elastic sheet 131 may also be mounted to the driving base frame 111 by the above-mentioned bridge mounting method, which is not described herein again.
In the second example of the present application, as shown in fig. 13A, the step S300 of the method for assembling an image pickup module may include the steps of:
s321: a bracket 1112 for fixedly connecting the first contour 1311 of the first elastic sheet 131 of the suspension mechanism 13 to the driving base 111 of the driving assembly 11;
s322: after the optical lens 12 with the coil 112 is flipped over the space 110 of the driving assembly 11, the first inner profile 1312 of the first elastic piece 131 is adhered or heat-staked to the upper portion of the lens barrel 121 of the optical lens 12;
s323: bonding or heat-riveting a second inner contour 1322 and a second outer contour 1321 of the second elastic piece 132 of the suspension mechanism 13 to the lower portion of the lens barrel 121 of the optical lens 12 and the driving base frame 111, respectively; and
s324: the magnetic element 113 of the driving assembly 11 is disposed opposite to the driving base 111 of the driving assembly 11 to form the lens assembly 10.
Exemplarily, in this example of the present application, as shown in fig. 13B, first, the first resilient piece 131 is fixedly connected to at least two brackets 1112 of the driving pedestal 111, that is, the driving pedestal 111 includes a base 1111 and at least two brackets 1112 integrally extending upward from four corner regions of the base 1111, so as to form a mounting surface with a height difference on the surface of the driving pedestal 111. It is understood that the base 1111 and the at least two brackets 1112 of the driving base 111 may be integrally formed through an injection molding process (i.e., one-shot molding), and the at least two brackets 1112 may be further integrally formed on the formed base 1111 through an injection molding process (i.e., two-shot molding).
Preferably, the first profile 1311 of the first elastic piece 131 is heat riveted to the at least two brackets 1112. Of course, the first profile 1311 of the first elastic sheet 131 may also be fixed to the at least two brackets 1112 by gluing; alternatively, the first contour 1311 of the first elastic sheet 131 may be injection molded to the at least two brackets 1112 by injection molding again.
Next, the optical lens 12 with the coil 112 is flipped into the space 110 of the driving assembly 11, so that the first inner contour 1312 of the first elastic sheet 131 and the lens barrel 121 of the optical lens 12 are fixedly connected by bonding or hot riveting. It is understood that the flip-chip of the present application refers to assembling the optical lens 12 in a direction from the base 1111 to the first elastic sheet 131, that is, the light-in end 1201 of the optical lens 12 is inserted into the space 110 first, and the light-out end 1202 of the optical lens 12 is inserted into the space 110 later.
Then, the second contour 1321 of the second elastic piece 132 is directly attached to the base 1111 of the driving base frame 111, and the lens barrel 121 of the optical lens 12 is fixedly connected to the second contour 1322 of the second elastic piece 132. It is understood that the second outer contour 1321 of the second elastic sheet 132 may be adhered and fixed to the four corner regions of the base 1111 by glue, or the second elastic sheet 132 may also be thermally riveted and fixed to the four corner regions of the base 1111 by riveting holes located on the second outer contour 1321 and riveting posts located on the four corner regions of the base 1111.
Finally, the magnetic elements 113 are correspondingly mounted on four sides or four corners of the driving base frame 111 of the driving assembly 11 to form the lens assembly 10.
In the third example of the present application, as shown in fig. 14A, the step S300 of the method for assembling an image pickup module may include the steps of:
s331: integrally forming the first contour 1311 of the first elastic sheet 131 and the second contour 1321 of the second elastic sheet 132 of the suspension mechanism 13 on the bracket 1112 of the driving base 111 of the driving assembly 11 by an insert molding process;
s332: inversely installing the optical lens 12 with the coil 112 in the space 110 of the driving assembly 11 through the second aligning hole 1320 of the second elastic sheet 132;
s333: bonding or heat-riveting the first inner profile 1312 of the first elastic piece 131 and the second inner profile 1322 of the second elastic piece 132 to the upper portion and the lower portion of the lens barrel 121 of the optical lens 12, respectively; and
s334: the magnetic element 113 of the driving assembly 11 is disposed opposite to the driving base 111 of the driving assembly 11 to form the lens assembly 10.
Exemplarily, in this example of the present application, as shown in fig. 14B, the second resilient tab 132 is first placed on the base 1111 flatly, and the at least two brackets 1112 are integrally formed on the four corner regions of the base 1111 and the second resilient tab 132 by injection molding, that is, at least a portion of the second outer contour 1321 of the second resilient tab 132 is embedded between the base 1111 and the brackets 1112, so that the second resilient tab 132 is fixed on the driving base 111 by insert molding; the first resilient tab 131 is then flatly placed on the upper surfaces of the at least two brackets 1112, and at least two protrusions are integrally and upwardly extended from the upper surfaces of the at least two brackets 1112 by injection molding, so that the first contour 1311 of the first resilient tab 131 is injection molded in the at least two brackets 1112.
It should be noted that, as shown in fig. 14C, in other examples of the present application, the first elastic sheet 131 and the second elastic sheet 132 may also be integrally formed with the driving base frame 111 by one-time injection molding, that is, the second elastic sheet 132 is flatly placed on the base 1111, and the supporting column 134 arranged along the height direction on the first elastic sheet 131 is used to support the first elastic sheet 131 through the supporting column 134, so that the first elastic sheet 131 and the second elastic sheet 132 maintain a better parallelism; then, the at least two brackets 1112 are integrally formed on the four corner regions of the base 1111, the first resilient piece 131, the second resilient piece 132 and the supporting pillar 134 by injection molding, that is, at least a part of the first outer contour 1311 of the first resilient piece 131 and the second outer contour 1321 of the second resilient piece 132 are embedded in the at least two brackets 1112, and the supporting pillar 134 is completely embedded in the at least two brackets 1112.
According to another aspect of the present invention, the present invention further provides an electronic apparatus, wherein the electronic apparatus includes an electronic apparatus body and at least one camera module 1, and each camera module 1 is respectively disposed on the electronic apparatus body for obtaining an image. It should be noted that the type of the electronic device body is not limited, for example, the electronic device body may be any electronic device capable of being configured with the camera module, such as a smart phone, a tablet computer, a notebook computer, an electronic book, a personal digital assistant, a camera, and the like.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (16)
1. The module of making a video recording, its characterized in that includes:
a photosensitive assembly; and
a lens assembly, wherein the lens assembly is correspondingly disposed on a photosensitive path of the photosensitive assembly, and the lens assembly includes:
a drive assembly, wherein the drive assembly has a space;
an optical lens, wherein the optical lens is arranged in the space of the driving component in a driving way, and the optical lens comprises a lens barrel and a lens group assembled in the lens barrel;
a suspension mechanism, wherein the suspension mechanism repositionably suspends the optical lens from the space of the drive mechanism; and
the buffer layer is correspondingly arranged on the outer side wall of the lens barrel of the optical lens, the driving assembly comprises a driving base frame for limiting the space and a coil and a magnetic element which are used for driving the optical lens and are oppositely arranged, and the coil is directly wound on the buffer layer, so that the buffer layer is positioned between the coil and the outer side wall of the lens barrel.
2. The camera module of claim 1, wherein the buffer layer is fabricated from a flexible material.
3. The camera module of claim 2, wherein the outer sidewall of the lens barrel is provided with a seating groove, wherein the seating groove extends around an optical axis of the optical lens, and the buffer layer is disposed within the seating groove of the lens barrel.
4. The camera module of claim 2, wherein the outer sidewall of the lens barrel is provided with a mount table, wherein the mount table integrally extends outward from the outer sidewall of the lens barrel, and the buffer layer is provided on the mount table of the lens barrel.
5. The camera module of any one of claims 1 to 4, wherein the suspension mechanism includes a first resilient piece and a second resilient piece disposed at an interval along an optical axis direction of the driving assembly, wherein a first engaging hole of the first resilient piece is adapted to an incident end of the optical lens to be engaged with the lens barrel of the optical lens, and a second engaging hole of the second resilient piece is adapted to an emergent end of the optical lens to be engaged with the lens barrel of the optical lens.
6. The camera module according to claim 5, wherein the first resilient piece has at least one first outer portion fixedly connected to the driving base, at least one first inner portion defining the first connection hole, and one or more first deformation portions integrally connected between the first outer portion and the first inner portion, and the first inner portion of the first resilient piece is fixedly connected to an upper portion of the lens barrel.
7. The camera module of claim 6, wherein the second resilient piece has one or more second outer contours fixedly connected to the driving base, one or more second inner contours defining the second mating holes, and one or more second deformation portions integrally connected between the second outer contours and the second inner contours, wherein the second inner contours of the second resilient piece are fixedly connected to the lower portion of the lens barrel.
8. The camera module of claim 7, wherein the drive chassis of the drive assembly includes a base and at least two legs extending integrally upward from the base, wherein the first and second resilient tabs of the suspension mechanism are mounted to the legs of the drive chassis in spaced relation.
9. The camera module of claim 8, wherein the coil is located between the first spring plate and the second spring plate, and the magnetic element is correspondingly disposed on the driving base frame.
10. The camera module of claim 9, wherein the driving assembly further comprises at least two terminals disposed on the driving base, wherein two electrical connection points of the coil are electrically connected to the at least two terminals through the first resilient piece and/or the second resilient piece.
11. The method for assembling the camera module is characterized by comprising the following steps:
providing an optical lens, wherein the optical lens comprises a lens barrel and a lens group assembled in the lens barrel;
arranging a buffer layer on the outer side wall of the lens cone, and directly winding the coil on the buffer layer;
the optical lens with the coil is repositionably suspended in a space of a driving assembly through a suspension mechanism to form a lens assembly, wherein a magnetic element of the driving assembly is arranged opposite to the coil mounted on the lens barrel; and
the lens component is correspondingly arranged on the photosensitive path of the photosensitive component to form a camera module.
12. The method for assembling a camera module of claim 11, wherein in the step of disposing a buffer layer on the outer sidewall of the barrel and winding the coil directly on the buffer layer:
and applying glue or silica gel into the placing groove of the lens cone to solidify and form the buffer layer.
13. The method for assembling a camera module according to claim 11 or 12, wherein the step of repositionably suspending the optical lens with the coil in a space of a driving assembly by a suspension mechanism to form a lens assembly, wherein a magnetic element of the driving assembly is disposed opposite to the coil mounted on the lens barrel, comprises the steps of:
integrally forming a second outline part of a second elastic sheet of the suspension mechanism on a driving base frame of the driving assembly through an insert injection molding process;
after the optical lens with the coil is positively arranged in the space of the driving assembly, the second inner outline part of the second elastic sheet is bonded or hot riveted to the lower part of the lens cone of the optical lens;
oppositely arranging the magnetic element of the driving component on the driving pedestal of the driving component to form the lens component; and
and respectively bonding or hot riveting a first inner contour part and a first outer contour part of a first elastic sheet of the suspension mechanism on the upper part of the lens cone of the optical lens and the bracket of the driving base frame of the driving assembly.
14. The method for assembling a camera module according to claim 11 or 12, wherein the step of repositionably suspending the optical lens with the coil in a space of a driving assembly by a suspension mechanism to form a lens assembly, wherein a magnetic element of the driving assembly is disposed opposite to the coil mounted on the lens barrel, comprises the steps of:
fixedly connecting a first outline part of a first elastic sheet of the suspension mechanism to a bracket of a driving base frame of the driving assembly;
after the optical lens with the coil is inversely installed in the space of the driving assembly, the first inner contour part of the first elastic sheet is adhered or hot riveted on the upper part of the lens cone of the optical lens;
respectively bonding or hot riveting a second inner contour part and a second outer contour part of a second elastic sheet of the suspension mechanism to the lower part of the lens cone of the optical lens and the driving base frame; and
the magnetic element of the driving assembly is oppositely arranged on the driving base frame of the driving assembly to form the lens assembly.
15. The method for assembling a camera module according to claim 11 or 12, wherein said step of repositionably suspending the optical lens with the coil in a space of a driving assembly by a suspension mechanism to form a lens assembly, wherein a magnetic element of the driving assembly is disposed opposite to the coil mounted to the lens barrel, comprises the steps of: the method comprises the following steps:
integrally forming a first outline part of a first elastic sheet and a second outline part of a second elastic sheet of the suspension mechanism on a bracket of a driving base frame of the driving assembly through an insert injection molding process;
the optical lens with the coil is inversely arranged in the space of the driving component through the second sleeving connection hole of the second elastic sheet;
respectively bonding or hot riveting the first inner contour part of the first elastic sheet and the second inner contour part of the second elastic sheet to the upper part and the lower part of the lens cone of the optical lens; and
the magnetic element of the driving assembly is oppositely arranged on the driving base frame of the driving assembly to form the lens assembly.
16. A lens assembly, comprising:
a drive assembly, wherein the drive assembly has a space;
an optical lens, wherein the optical lens is drivably disposed in the space of the driving assembly, and the optical lens includes a lens barrel and a lens group assembled within the lens barrel;
a suspension mechanism, wherein the suspension mechanism repositionably suspends the optical lens from the space of the drive mechanism; and
the buffer layer is correspondingly arranged on the outer side wall of the lens barrel of the optical lens, the driving assembly comprises a driving base frame for limiting the space and a coil and a magnetic element which are used for driving the optical lens and are oppositely arranged, and the coil is directly wound on the buffer layer, so that the buffer layer is positioned between the coil and the outer side wall of the lens barrel.
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| CN202110654098.2A CN115473977B (en) | 2021-06-11 | 2021-06-11 | Lens assembly, camera module and assembly method thereof |
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| CN202110654098.2A CN115473977B (en) | 2021-06-11 | 2021-06-11 | Lens assembly, camera module and assembly method thereof |
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| CN209400775U (en) * | 2019-02-20 | 2019-09-17 | 南昌欧菲晶润科技有限公司 | Lens assembly, camera module and intelligent terminal |
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| JP2008181054A (en) * | 2007-01-26 | 2008-08-07 | Shicoh Eng Co Ltd | Lens drive device and cell phone with camera |
| CN203911716U (en) * | 2014-06-16 | 2014-10-29 | 歌尔声学股份有限公司 | Voice coil motor |
| CN105093462A (en) * | 2015-08-12 | 2015-11-25 | 小米科技有限责任公司 | Camera module and electronic equipment |
| CN108989630A (en) * | 2017-06-02 | 2018-12-11 | 宁波舜宇光电信息有限公司 | Driving assembly and camera module and its electronic equipment |
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