Lens assembly and camera module

Abstract

Disclosed are a lens assembly and a camera module. The lens assembly includes at least two coaxially arranged lens sections. In an operating state, a driver adjusts the relative position of the at least two lens sections so that the effective focal length of the optical system formed by the at least two lens sections is within a preset range. Thus, when the camera module is not in operation, it has a relatively small height dimension, while when in operation, it has a relatively large effective focal length. This resolves the technical contradiction between the overall height dimension and the large effective focal length of conventional upright camera modules.

Description

Technical Field

[0001] The present application relates to the field of camera modules, and in particular to lens assemblies and camera modules. Background Art

[0002] With the increasing popularity of mobile electronic devices, the technology behind camera modules used in these devices to help users capture images (e.g., videos or pictures) has rapidly developed and progressed. Currently, camera modules in mobile electronic devices (e.g., smartphones) are required to implement multi-zoom shooting capabilities.

[0003] To achieve the technical requirements of multi-zoom or telephoto shooting, at least one telephoto camera module is required. Here, a telephoto camera module refers to a camera module with a large effective focal length. As the zoom ratio increases, the total effective focal length of the telephoto camera module increases, resulting in a continuous increase in the overall height of the camera module. This is obviously difficult to adapt to the trend of thinner and lighter electronic devices.

[0004] To address the technical contradiction between the height and effective focal length of traditional upright camera modules, most manufacturers have adopted periscope camera modules to replace them. Compared to traditional upright camera modules, periscope camera modules use light-deflecting elements (such as prisms and mirrors) to change the imaging optical path, thereby reducing the overall height of the camera module while meeting the optical design requirements of a longer effective focal length.

[0005] However, periscope camera modules have a relatively complex structure, which not only increases their cost but also directly increases their manufacturing difficulty. Furthermore, periscope camera modules reduce their height at the expense of their length and width. This large length and width makes periscope camera modules unattractive on terminal devices, affecting the user experience.

[0006] Furthermore, in terms of optical performance, although periscope camera modules have a relatively large effective focal length, this effective focal length is fixed, meaning that the optical performance of periscope camera modules has relatively poor adjustability. To meet consumers' diverse demands for camera modules, electronic devices are typically equipped with multiple camera modules, i.e., multiple-camera modules. This not only leads to a surge in costs but also further exacerbates the difficulty of manufacturing.

[0007] Therefore, an optimized camera module solution is needed to resolve the technical contradiction between the height size and the larger effective focal length of the camera module. Summary of the Invention

[0008] One advantage of the present application is providing a lens assembly and a camera module that, in terms of temporal distribution, staggers the conflict between the overall height dimension and the maximum effective focal length of an upright camera module. Specifically, the camera module has a relatively small height dimension when not in operation, and a relatively large effective focal length when in operation, thereby meeting the terminal device's requirement for the overall height dimension of the camera module when not in operation and meeting the requirement for a large effective focal length of the camera module when in operation.

[0009] Another advantage of the present application is that it provides a lens assembly and a camera module, wherein the camera module uses a split lens including at least two lens parts as its imaging lens, and in a working state, a driver is used to adjust the relative position relationship between the at least two lens parts so that the effective focal length of the optical system formed by the at least two lens parts is within a preset range. In this way, the camera module has a relatively small height dimension in a non-working state, and has a relatively large effective focal length in a working state. In this way, the technical contradiction between the overall height dimension and the larger effective focal length of the traditional upright camera module is solved.

[0010] Another advantage of the present application is providing a lens assembly and a camera module, wherein, through the driver and the split lens, the camera module can adjust optical performance such as optical zoom and / or optical focus. In other words, the camera module according to the embodiments of the present application has relatively strong optical performance adjustment capabilities.

[0011] Other advantages and features of the present application will become apparent from the following description, and may be achieved by means of the instruments and combinations particularly pointed out in the claims.

[0012] To achieve at least one of the above advantages, the present application provides a lens assembly comprising:

[0013] An optical lens having an optical axis, comprising a first lens portion and a second lens portion arranged along the optical axis, wherein the first lens portion comprises at least one optical lens, and the second lens portion comprises at least one optical lens, wherein a gap is provided between the first lens portion and the second lens portion; and

[0014] A driving assembly includes a first driving element for driving the first lens portion to move along the direction set by the optical axis and a second driving element for driving the second lens portion to move along the direction set by the optical axis, wherein the second driving element is located on the inner side of the first driving element, wherein the first driving element is configured to drive the first lens portion to move along the direction set by the optical axis to adjust the first lens portion and the second lens portion to a predetermined position, wherein, at the predetermined position, the effective focal length of the optical system formed by the first lens portion and the second lens portion is within a preset range.

[0015] In the lens assembly according to the present application, the second driving element is configured to drive the second lens portion to move along the direction set by the optical axis after the relative position relationship between the first lens portion and the second lens portion is adjusted to a specific relative position relationship by the first driving element, so as to perform optical focusing, wherein, during the process of the second driving element driving the second lens portion to move, the effective focal length of the optical system formed by the first lens portion and the second lens portion remains within the preset range.

[0016] In the lens assembly according to the present application, the second driving element is configured to drive the second lens part to move along the direction set by the optical axis to perform optical zoom after the first driving element adjusts the first lens part and the second lens part to the predetermined position.

[0017] In the lens assembly according to the present application, in the imageable optical system formed by the first lens part and the second lens part, the distance between the optical lens located at the bottom of the first lens part and the optical lens located at the top of the second lens part is the largest.

[0018] In the lens assembly according to the present application, the lens assembly further includes a base and a shell mounted on the base, the shell having a receiving cavity and a first opening connected to the receiving cavity, wherein the optical lens is received in the receiving cavity of the shell, the first lens portion of the optical lens corresponds to the first opening and the aperture of the first opening is larger than the outer diameter of the first lens portion to allow the first lens portion to extend or retract into the receiving cavity through the first opening under the drive of the first driving element.

[0019] In the lens assembly according to the present application, the lens assembly further includes a lens holder, the lens holder having a mounting cavity, and a second opening formed at the upper end of the lens holder and connected to the mounting cavity, wherein the first lens part is installed in the mounting cavity of the lens holder, and the first driving element is configured to drive the lens holder to move along the direction set by the optical axis to drive the first lens part to move along the direction set by the optical axis.

[0020] In the lens assembly according to the present application, the first driving element is arranged on the outside of the lens holder, and the second driving element is arranged on the inside of the lens holder. In this way, the second driving element is located on the inside of the first driving element.

[0021] In the lens assembly according to the present application, the lens holder includes a cylindrical holder body and support legs extending outward and downward from the cylindrical holder body, wherein the inner cavity of the cylindrical holder body forms an installation cavity for installing the first lens part, and the support legs cooperate with the base to form an accommodating cavity, wherein the second driving element is installed in the accommodating cavity.

[0022] In the lens assembly according to the present application, the first driving element is implemented as a piezoelectric actuator, and the second driving element is implemented as an electromagnetic actuator.

[0023] In the lens assembly according to the present application, the driving assembly further includes a guiding mechanism for guiding the lens holder to move along the direction set by the optical axis.

[0024] In the lens assembly according to the present application, the first driving element and the guiding mechanism are located on a first side and a second side opposite to the lens holder.

[0025] In the lens assembly according to the present application, the guide mechanism is mounted between the bottom surface and the top surface of the housing and passes through a guide rod of the lens holder, wherein an extending direction of the guide is consistent with a direction set by the optical axis.

[0026] In the lens assembly according to the present application, the outer diameter of the upper end portion of the lens holder is equal to the inner diameter of the first opening, so that the lens holder is adaptively clamped in the first opening.

[0027] In the lens assembly according to the present application, the lens assembly further includes a light-transmissive cover plate that seals the second opening.

[0028] In the lens assembly according to the present application, the lens assembly further includes a limiting element arranged above the second lens part and located in the accommodating cavity, for limiting the maximum height of the upward movement of the second lens part.

[0029] In the lens assembly according to the present application, the limiting element is formed around the second lens part to form an isolation element for isolating the second lens part.

[0030] In the lens assembly according to the present application, the lens holder and / or the limiting element cooperate with the housing to form at least one winding flow channel in the receiving cavity of the housing.

[0031] According to another aspect of the present application, a camera module is provided, comprising:

[0032] A photosensitive component, comprising a circuit board and a photosensitive chip electrically connected to the circuit board; and

[0033] The lens assembly as described above, wherein the lens assembly is held on the light-sensing path of the photosensitive assembly.

[0034] In the camera module according to the present application, the driving component further includes a third driving element, which is configured to drive the photosensitive component to move in a plane perpendicular to the optical axis to perform optical image stabilization.

[0035] In the camera module according to the present application, the third driving element is configured to drive the photosensitive chip of the photosensitive component to move in a plane perpendicular to the optical axis to perform optical image stabilization.

[0036] In the camera module according to the present application, the third driving element is implemented as a shape memory alloy driver.

[0037] Further objectives and advantages of the present application will be fully reflected through understanding of the following description and drawings.

[0038] These and other objects, features and advantages of the present application are fully reflected in the following detailed description, drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and other purposes, features, and advantages of the present application will become more apparent through a more detailed description of the embodiments of the present application in conjunction with the accompanying drawings. The accompanying drawings are intended to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0040] Figure 1The figure shows a three-dimensional schematic diagram of the camera module in a non-working state according to an embodiment of the present application.

[0041] Figure 2 The figure shows a three-dimensional exploded view of the camera module according to an embodiment of the present application.

[0042] Figure 3 The figure shows a cross-sectional schematic diagram of the camera module according to an embodiment of the present application.

[0043] Figure 4 The figure shows a stereoscopic schematic diagram of the camera module switching from a non-working state to a working state according to an embodiment of the present application.

[0044] Figure 5 The figure shows one of the schematic diagrams of the camera module in working state according to an embodiment of the present application.

[0045] Figure 6 The figure shows a second schematic diagram of the camera module in a working state according to an embodiment of the present application.

[0046] Figure 7A and Figure 7B FIG2 shows a schematic diagram of the first driving element according to an embodiment of the present application.

[0047] Figure 8A and Figure 8B FIG2 shows a schematic diagram of a modified implementation of the first driving element according to an embodiment of the present application.

[0048] Figure 9 FIG2 illustrates one of schematic diagrams of an electronic device according to an embodiment of the present application.

[0049] Figure 10 The figure shows a second schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0050] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described herein.

[0051] Exemplary camera module

[0052] like Figures 1 to 3As shown, a camera module according to an embodiment of the present application is illustrated, wherein the camera module 300 includes a photosensitive component 10, a base 21 mounted on the photosensitive component 10, a housing 22 mounted on the base 21, an optical lens 23 accommodated in the housing 22 and held on the light-sensing path of the photosensitive component 10, and a driving component 30 for driving the optical lens 23 to move for adjusting optical performance. In particular, in the embodiment of the present application, the optical lens 23 and the driving component 30 have a special structural configuration so that the camera module 300 can be switched between a working state and a non-working state, wherein the camera module 300 has a relatively small height dimension in the non-working state, and has a relatively large effective focal length in the working state, so as to solve the technical contradiction between the overall height dimension and the large effective focal length of the traditional upright camera module 300.

[0053] Accordingly, if Figures 1 to 3 As shown, in an embodiment of the present application, the photosensitive component 10 includes: a circuit board 11, a photosensitive chip 12, a bracket 13 and a filter element 14. Specifically, the photosensitive chip 12 is electrically connected to the circuit board 11, so that the circuit board 11 provides the photosensitive chip 12 with the control circuit and electrical energy required for operation. For example, in one example, the photosensitive chip 12 is mounted on the upper surface of the circuit board 11 and is electrically connected to the circuit board 11 by gold wire. Of course, in other examples of the present application, the photosensitive chip 12 can also be arranged on the circuit board 11 in other ways and / or electrically connected to the circuit board 11 in other ways, for example, attached to the lower surface of the circuit board 11 in a flip-chip manner, which is not limited to the present application.

[0054] The bracket 13 is formed on the circuit board 11 for supporting other components, wherein the bracket 13 has a light window corresponding to at least the photosensitive area of ​​the photosensitive chip 12. In a specific example of the present application, the bracket 13 is implemented as a separately molded plastic bracket 13, which is attached to the surface of the circuit board 11 by an adhesive and is used to support other components. Of course, in other examples of the present application, the bracket 13 can also be formed on the circuit board 11 in other ways. For example, the bracket 13 is implemented as a molded bracket 13, which is integrally molded at a preset position of the circuit board 11 through a molding process. This is not limited to the present application.

[0055] The filter element 14 can be mounted on the bracket 13 to be maintained on the light-sensing path of the photosensitive chip 12. In this way, when the external light passes through the filter element 14 to reach the photosensitive chip 12, the stray light in the external light can be filtered by the filter element 14 to improve the imaging quality. It is worth mentioning that in other examples of the present application, the filter element 14 can also be mounted on the bracket 13 in other ways. For example, a filter element bracket (not shown) is first provided on the bracket 13, and then the filter element 14 is mounted on the filter element bracket. That is, in this example, the filter element 14 can be indirectly mounted on the bracket 13 through other supporting members. In addition, in other examples of the present application, the filter element 14 can also be mounted at other positions of the camera module 300. For example, the filter element 14 is formed in the optical lens 23 (for example, as a layer of filter film attached to the surface of a certain optical lens of the optical lens 23). This is not limited to the present application.

[0056] In order to increase the bottom strength of the photosensitive component 10, in some examples of the present application, the photosensitive component 10 further includes a reinforcing plate (not shown) provided on the lower surface of the circuit board 11. For example, a steel plate can be provided on the lower surface of the circuit board 11 to reinforce the strength of the circuit board 11. Accordingly, the reinforcing plate can be configured to have a shape and size consistent with that of the circuit board 11, so as to reinforce the entire circuit board 11 after being stacked on the lower surface of the circuit board 11.

[0057] like Figures 1 to 3 As shown, in the embodiment of the present application, the base 21 is mounted on the bracket 13, wherein the housing 22 mounted on the base 21 has a receiving cavity 220 and a first opening 221 connected to the receiving cavity 220, and the optical lens 23 is received in the receiving cavity 220 of the housing 22. In particular, in the embodiment of the present application, the aperture of the first opening 221 is larger than the outer diameter of the optical lens 23 to allow the optical lens 23 to extend or retract into the receiving cavity 220 through the first opening 221.

[0058] In particular, in the embodiment of the present application, the optical lens 23 is implemented as a split lens, which includes at least two lens parts, for example, Figures 1 to 3In the illustrated example, the split lens includes two lens parts: a first lens part 231 and a second lens part 232, wherein the first lens part 231 includes a first lens barrel 2311 and at least one optical lens 230 installed in the first lens barrel 2311, and the second lens part 232 includes a second lens barrel 2321 and at least one optical lens 230 installed in the second lens barrel 2321, and the at least one optical lens 230 of the first lens part and the at least one optical lens 230 of the second lens part 232 cooperate with each other to form an imageable optical system.

[0059] It is understood by those skilled in the art that, for an imageable optical system formed by the first lens section 231 and the second lens section 232, within a predetermined range of the number of optical lenses 230, the effective focal length of the imageable optical system is directly proportional to the number of optical lenses 230, and the resolving power of the imageable optical system is also directly proportional to the number of optical lenses 230. That is, within the predetermined range, the greater the effective focal length of the imageable optical system, the greater the number of optical lenses 230 it includes; and the better the resolving power of the imageable optical system, the greater the number of optical lenses 230 it includes.

[0060] As previously mentioned, in the embodiments of the present application, with the popularization of mobile electronic devices, the relevant technologies of the camera module 300 used in mobile electronic devices to help users capture images have been rapidly developed and advanced. Currently in the market, it is expected that the camera module 300 configured in the mobile electronic device can realize a multi-zoom shooting function or a telephoto shooting function, that is, the configured camera module 300 is required to have a relatively large effective focal length. This requires that the imaging optical system of the configured optical lens 23 has a relatively large effective focal length, that is, the imaging optical system of the optical lens 23 is configured to be configured with a relatively large number of optical lenses 230.

[0061] Under such technical requirements, if the split lens is implemented as a conventional split lens, that is, the first lens part 231 and the second lens part 232 have a fixed relative position relationship, then the split lens will have a relatively large height dimension, which will cause the camera module 300 as a whole to have a relatively large height dimension, which is difficult to meet the assembly requirements of lightweight and thin mobile electronic devices.

[0062] In response to the above technical problems, the inventors of the present application have attempted to configure the split lens as a dynamic split lens, that is, the relative position relationship between the first lens part 231 and the second lens part 232 can be adjusted. In this way, in the working state, the first lens part 231 and the second lens part 232 of the split lens are adjusted to predetermined positions to form a complete imageable optical system. In the non-working state, the first lens part 231 and the second lens part 232 of the split lens are close to each other to reduce their overall height and thus reduce the overall height of the camera module 300 to meet the requirements of lightweight and thin assembly of mobile electronic devices.

[0063] To this end, in an embodiment of the present application, the driving component 30 is configured for the split lens to drive the split lens to switch between a working state and a non-working state through the driving component 30, wherein, in the working state, the driving component 30 drives the split lens to adjust the first lens part 231 and the second lens part 232 of the split lens to predetermined positions to form a complete imageable optical system; in the non-working state, the driving component 30 drives the first lens part 231 and the second lens part 232 in the split lens to move closer to each other to reduce its overall height size and thereby reduce the overall height size of the camera module 300 to meet the assembly requirements of lightweight and thin mobile electronic devices.

[0064] Specifically, if Figures 1 to 3 As shown, in an embodiment of the present application, the driving assembly 30 includes a first driving element 31, wherein, in a working state, the first driving element 31 is configured to drive the first lens portion 231 to move along the direction set by the optical axis to adjust the first lens portion 231 and the second lens portion 232 to a predetermined position, wherein, at the predetermined position, the effective focal length of the imageable optical system formed by the first lens portion 231 and the second lens portion 232 is within a preset range.

[0065] In particular, in the embodiment of the present application, the first lens portion 231 of the optical lens 23 corresponds to the first opening 221 and the aperture of the first opening 221 is larger than the outer diameter of the first lens portion 231. Such a size configuration allows the first lens portion 231 to extend through the first opening 221 or retract into the receiving cavity 220 under the drive of the first driving element 31, as shown in FIG. Figure 4That is, in the embodiment of the present application, due to the size configuration of the first opening 221, the first lens portion 231 has a large upward movement stroke. In this way, in the working state, the first lens portion 231 can extend out of the housing 22 under the action of the first driving element 31 so that the first lens portion 231 and the second lens portion 232 can be adjusted to the predetermined position.

[0066] Furthermore, if Figure 5 As shown, in this embodiment of the present application, the drive assembly 30 further includes a second drive element 32. In an operating state, the second drive element 32 is configured to drive the second lens portion 232 to move along the direction set by the optical axis to perform optical focusing after the first drive element 31 has adjusted the first lens portion 231 and the second lens portion 232 to the predetermined position. Specifically, in this embodiment of the present application, while the second drive element 32 is driving the second lens portion 232 to move, the effective focal length of the optical system formed by the first lens portion 231 and the second lens portion 232 remains within the predetermined range.

[0067] That is, in a specific example of the present application, in a working state, first, the second lens portion 232 remains stationary, and the first driving element 31 drives the first lens portion 231 to move along the optical axis to a predetermined position, wherein, at the predetermined position, the effective focal length of the imageable optical system formed by the first lens portion 231 and the second lens portion 232 is within a preset range; then, the first lens portion 231 remains stationary, and the second driving element 32 drives the second lens portion 232 to move along the optical axis to perform optical focusing, wherein, in particular, in the process of the second driving element 32 driving the second lens portion 232 to move, the effective focal length of the optical system formed by the first lens portion 231 and the second lens portion 232 remains within the preset range, as shown in FIG. Figure 5 shown.

[0068] It is worth mentioning that in other examples of the present application, the mode of the working state can also be set to other types. For example, in another specific example, the working state of the camera module 300 is: first, the second lens part 232 remains stationary, and the first driving element 31 drives the first lens part 231 to move along the optical axis to a predetermined position, wherein the effective focal length of the imaging optical system formed by the first lens part 231 and the second lens part 232 at the predetermined position is within a preset range; then, the first driving element 31 and the second driving element 32 simultaneously drive the first lens part 231 and the second lens part 232 to move along the same direction of the optical axis for optical focusing. In this way, the rate of optical focusing can be improved, wherein, in particular, in the process of simultaneously driving the first lens part 231 and the second lens part 232 to move along the same direction of the optical axis by the first driving element 31 and the second driving element 32, the effective focal length of the optical system formed by the first lens part 231 and the second lens part 232 remains within the preset range, such as Figure 6 shown.

[0069] For example, in another specific example, the camera module 300 operates as follows: first, the second lens portion 232 remains stationary, and the first driving element 31 drives the first lens portion 231 to move along the optical axis to a predetermined position, wherein, at this predetermined position, the effective focal length of the imaging optical system formed by the first lens portion 231 and the second lens portion 232 is within a preset range; then, the first lens portion 231 remains stationary, and the second driving element 32 drives the second lens portion 232 to move along the optical axis to perform optical zoom. That is, in this operating mode, during the process of the second driving element 32 driving the second lens portion 232 to move, the effective focal length of the optical system formed by the first lens portion 231 and the second lens portion 232 changes.

[0070] It should be understood that in other examples of the present application, the working status mode of the camera module 300 can also be set to other types, which is not limited to the present application.

[0071] Accordingly, in a non-operating state, the first driving element 31 and / or the second driving element 32 drive the first lens portion 231 and / or the second lens portion 232 toward each other, thereby reducing the overall size of the first lens portion 231 and the second lens portion 232. For example, in a specific example, the non-operating state is: the second lens portion 232 remains stationary, and the first driving element 31 drives the first lens portion 231 toward the second lens portion 232, thereby reducing the distance between the first lens portion 231 and the second lens portion 232.

[0072] It's worth noting that, to minimize the overall height of the split lens in its non-operating state, in this embodiment of the present application, preferably, in the optical system formed by the first lens portion 231 and the second lens portion 232, the distance between the lowest optical lens 230 in the first lens portion 231 and the highest optical lens 230 in the second lens portion 232 is the greatest. In other words, the imageable optical system formed by the optical lens 23 is divided into two sub-optical systems by a distance between the two optical lenses 230 with the greatest gap: the first lens portion 231 comprises a first sub-optical system, and the second lens portion 232 comprises a second sub-optical system. This allows the first lens portion 231 and the second lens portion 232 to be as close together as possible in their non-operating state, minimizing the overall height of the optical lens 23 in this non-operating state.

[0073] Of course, in the embodiment of the present application, other methods may be used to divide the imageable optical system formed by the optical lens 23, which is not limited to the present application.

[0074] It is worth noting that in the embodiment of the present application, when in an operating state, the gap between the first lens portion 231 and the second lens portion 232 reaches the gap required for a complete optical design. When in a non-operating state, the first lens portion 231 and the second lens portion 232 are close to each other. In this state, there does not necessarily exist a continuous gap between the first lens portion 231 and the second lens portion 232. That is, the first lens portion 231 and the second lens portion 232 can be completely separated to have a continuous gap, or the first lens portion 231 and the second lens portion 232 can partially contact each other to have a discontinuous gap, and this is not limited to the present application.

[0075] In particular, in this embodiment of the present application, the first driving element 31 is implemented as a piezoelectric actuator. The camera module 300 further includes a lens holder 24, wherein the lens holder 24 includes a cylindrical holder body 243 and a support leg 242 extending outward and downward from the cylindrical holder body 243. The inner cavity of the cylindrical holder body 243 forms a mounting cavity 240, wherein the first lens portion 231 is mounted within the mounting cavity 240 of the lens holder 24. Furthermore, the lens holder 24 also has a second opening 241 formed at the upper end of the lens holder 24 and connected to the mounting cavity 240. Accordingly, the first driving element 31 is configured to drive the lens holder 24 to move along the direction set by the optical axis, thereby driving the first lens portion 231 to move along the direction set by the optical axis. In other words, the piezoelectric actuator drives the lens holder 24 to drive the first lens portion 231 to move along the direction set by the optical axis.

[0076] Figure 7A and Figure 7B FIG2 is a schematic diagram of a specific example of the piezoelectric actuator according to an embodiment of the present application. Figure 7A and Figure 7B As shown, the piezoelectric actuator 100 includes: a piezoelectric active part 110, a driven shaft 120 that is drivably connected to the piezoelectric active part 110, and a driving part 130 that is tightly matched with the driven shaft 120, wherein the driving part 130 is configured to drive the lens holder 24 under the action of the piezoelectric active part 110 and the driven shaft 120 to drive the first lens part 231 to move along the direction set by the optical axis.

[0077] In such Figure 7A and Figure 7B In the illustrated example, the piezoelectric active portion 110 includes an electrode plate 111 and at least one piezoelectric substrate stacked on the electrode plate 111. The piezoelectric substrate exhibits the inverse piezoelectric effect and contracts or expands depending on the polarization direction and the direction of the electric field. For example, it can be manufactured and used by polarizing a substrate in the thickness direction of a single crystal or polycrystalline ceramic, polymer, or the like. Here, the inverse piezoelectric effect refers to the mechanical deformation of a dielectric when an electric field is applied in the polarization direction of the dielectric, resulting in a potential difference.

[0078] More specifically, in Figure 7A and Figure 7BIn the illustrated example, the at least one piezoelectric substrate includes a first piezoelectric substrate 112 and a second piezoelectric substrate 113, and the electrode plate 111 is sandwiched between the first piezoelectric substrate 112 and the second piezoelectric substrate 113. Furthermore, in this example, the piezoelectric active portion 110 further includes electrode layers 115 formed on the upper and lower surfaces of the first piezoelectric substrate 112, and electrode layers 115 formed on the upper and lower surfaces of the second piezoelectric substrate 113, respectively, so as to provide a pulse voltage to the first piezoelectric substrate 112 and the second piezoelectric substrate 113 via the electrode layers 115 and the electrode plate 111.

[0079] In this example, the electrode plate 111 may be formed of a plate-like element with a certain elasticity, for example, a metal plate with a certain elasticity. Figure 7A and Figure 7B In the illustrated example, the piezoelectric active portion 110 further includes at least one electrically conductive portion 114 electrically connected to the electrode plate 111. For example, the at least one electrically conductive portion 114 can be welded to the electrode plate 111, or the at least one electrically conductive portion 114 can be integrally formed with the electrode plate 111. It is worth noting that when there are multiple electrically conductive portions 114, preferably, the multiple electrically conductive portions 114 are symmetrically distributed on the outer surface of the electrode plate 111.

[0080] In this example, the first piezoelectric substrate 112 and the second piezoelectric substrate 113 are respectively attached to a first side surface and a second side surface opposite to the first side surface of the electrode plate 111 via the electrode layer 115. For example, in this example, the first piezoelectric substrate 112 and the second piezoelectric substrate 113 can be fixed to the electrode plate 111 in a surface-to-surface engagement, or the first piezoelectric substrate 112 and the second piezoelectric substrate 113 can be attached to the electrode plate 111 via conductive silver paste.

[0081] Preferably, in this example, the shapes and sizes of the first piezoelectric substrate 112 and the second piezoelectric substrate 113 are similar to or identical to those of the electrode plate 111, thereby enabling the piezoelectric active portion 110 to have better vibration efficiency. In this specific example, the first piezoelectric substrate 112, the second piezoelectric substrate 113, and the electrode plate 111 are circular plates.

[0082] In such Figure 7A and Figure 7BIn the illustrated example, the driven shaft 120 is fixed to the piezoelectric active part 110, for example, attached to the center of the piezoelectric active part 110 by adhesive. Specifically, the driven shaft 120 can be attached to the electrode layer 115 on the outer surface of the first piezoelectric substrate 112 by adhesive, or nestedly attached to the center hole of the electrode layer 115 on the outer surface of the first piezoelectric substrate 112 by adhesive, or the first piezoelectric substrate 112 has a center hole, and the driven shaft 120 is further embedded in the center hole of the first piezoelectric substrate 112, or the piezoelectric active part 110 has a center hole running through its upper and lower surfaces, and the driven shaft 120 is embedded in the center hole of the piezoelectric active part 110 by adhesive. In a specific implementation, the driven shaft 120 can be implemented as a carbon rod. The cross-sectional shape of the driven shaft 120 is circular or polygonal, preferably circular.

[0083] In such Figure 7A and Figure 7B In the illustrated example, the driving portion 130 and the driven shaft 120 are frictionally engaged, so that the driving portion 130 can be movably and tightly fitted on the driven shaft 120. In a specific implementation, the driving portion 130 can be implemented as a clamping mechanism for clamping the driven shaft 120, wherein preferably, the clamping mechanism can be a clamping mechanism with adjustable clamping force, or a clamping mechanism partially or entirely made of elastic material.

[0084] like Figure 7A and Figure 7BAs shown, the electrode layer 115 exposed on the surface of the piezoelectric active part 110 is electrically connected to the positive electrode 117 of the power control part 116, and the electrode plate 111 is electrically connected to the negative electrode 118 of the power control part 116 through the electrical conduction part 114. In this way, when the power control part 116 repeatedly applies a pulse voltage to the electrode layer 115 and the electrode plate 111, the first piezoelectric substrate 112 and the second piezoelectric substrate 113 are deformed in one direction under the action of the inverse piezoelectric effect, and quickly return to a flat plate shape under the elastic action of the electrode plate 111. During the deformation process, the driven shaft 120 moves back and forth in its set axial direction. Since the driving unit 130 and the driven shaft 120 are frictionally engaged, when the piezoelectric active unit 110 deforms in one direction, the driving unit 130 and the driven shaft 120 move together. When the piezoelectric active unit 110 quickly returns to its original shape, the driven shaft 120 also moves in the opposite direction. However, due to inertia, the driving unit 130 is unable to follow the movement of the driven shaft 120 and cannot return to its original position, remaining in that position. Therefore, during a deformation process, the position of the driving unit 130 changes. Accordingly, by repeatedly applying a pulse voltage, the above-described movement can be repeated, thereby moving the driving unit 130 to the target position.

[0085] Figure 8A FIG2 shows one of the schematic diagrams of another embodiment of the piezoelectric actuator 100 according to an embodiment of the present application. Figure 8B FIG2 shows another schematic diagram of the piezoelectric actuator 100 according to an embodiment of the present application. Figure 8A and 8B As shown, in this example, the piezoelectric actuator 100 includes: a piezoelectric active part 110, a driven shaft 120 that is drivably connected to the piezoelectric active part 110, and a driving part 130 that is tightly matched with the driven shaft 120, wherein the driving part 130 is configured to drive the first carrier 44 or the second carrier 45 under the action of the piezoelectric active part 110 and the driven shaft 120 to drive the zoom part 22 or the focusing part 23 to move along the optical axis.

[0086] like Figure 8A and Figure 8B As shown, in this example, the piezoelectric active part 110 includes a piezoelectric element 111A, and the piezoelectric element 111A has the following Figure 8A Specifically, as shown in the stacked structure Figure 8AAs shown, the piezoelectric element 111A includes multiple piezoelectric elastic elements 112A and multiple electrodes 113A, which are alternately stacked. In particular, this stacked structure allows the piezoelectric element 111A to achieve a relatively large deformation even when a small electric field is applied.

[0087] In this example, for ease of explanation, the electrodes 113A formed by alternately sandwiching multiple piezoelectric elastic elements 112A are defined as internal electrodes. The electrodes 113A disposed on the surfaces of the piezoelectric elastic elements 112A and located on the upper and lower surfaces of the piezoelectric element 111A are defined as upper and lower electrodes, respectively. Furthermore, the electrodes 113A disposed on the surfaces of the piezoelectric elastic elements 112A and located on the side surfaces of the piezoelectric element 111A are defined as side electrodes. Accordingly, in the case of multiple layers, electrodes 113A of the same polarity are electrically connected via the side electrodes.

[0088] like Figure 8B As shown, in this example, the driven shaft 120 has a cylindrical shape and is attached to the middle area of ​​the upper surface of the piezoelectric element 111A by an adhesive, so that the driven shaft 120 is coupled to the piezoelectric element 111A. Of course, in other examples of the present application, the shape of the driven shaft 120 can also be adjusted, and this is not limited to the present application.

[0089] Furthermore, the driven shaft 120 is made of a material primarily composed of one of "carbon, heavy metal, heavy metal carbide, heavy metal boride, and heavy metal nitride." The piezoelectric element 111A has a rectangular parallelepiped shape, having sides extending along mutually orthogonal X-axis, Y-axis, and Z-axis. In this example, the piezoelectric element 111A has an X-axis length of 1 mm, a Y-axis length of 1 mm, and a Z-axis length (height) of 2 mm.

[0090] It is worth mentioning that compared with the traditional electromagnetic drive, Figure 8A and Figure 8B The piezoelectric actuator 100 shown has the advantages of small size, large thrust and high precision. Figure 7A and Figure 7B The piezoelectric actuator 100 is shown, Figure 8A and Figure 8B The piezoelectric active portion 110 of the illustrated piezoelectric actuator 100 has a relatively small cross-sectional dimension, and is suitable for use in a module with a compact space. However, its thickness dimension is relatively large, and the internal structure of the piezoelectric element 111A is relatively complex.

[0091] Accordingly, the piezoelectric actuator 100 according to the embodiment of the present application can provide a relatively high driving force. More specifically, the piezoelectric actuator 100 selected in the present application can provide a driving force of 0.6N to 2N, which is sufficient to drive a component weighing more than 100mg.

[0092] In addition, in addition to being able to provide relatively large driving force, the piezoelectric actuator 100 also has other advantages compared to traditional electromagnetic motor solutions and memory alloy motor solutions, including but not limited to: relatively small size (having a slender shape), better response accuracy, relatively simpler structure, relatively simpler drive control, high product consistency, no electromagnetic interference, relatively larger stroke, short stabilization time, relatively small weight, etc.

[0093] More specifically, in the embodiments of the present application, Figure 8A and Figure 8B The illustrated piezoelectric actuator 100 serves as the first driving element 31. Furthermore, in the embodiment of the present application, the driving portion 130 of the piezoelectric actuator 100 is mounted on a side of the lens holder 24, and the piezoelectric active portion 110 of the piezoelectric actuator 100 is mounted on the base 21. In one specific example, the driving portion 130 and the lens holder 24 are integrally formed, i.e., the driving portion 130 and the lens holder 24 have a one-piece structure.

[0094] In order to make the movement of the first lens portion 231 smoother and prevent the first lens portion 231 from being greatly tilted, preferably, in the embodiment of the present application, Figures 1 to 3 As shown, the driving assembly 30 further includes a guiding mechanism 33 for guiding the lens holder 24 to move along the direction set by the optical axis. Figures 1 to 3 As shown, in this embodiment, the guide mechanism 33 is implemented as a guide rod structure. It is worth mentioning that in other examples of the present application, the guide mechanism 33 can also be implemented as a slider structure or a ball structure, which is not limited to the present application.

[0095] Specifically, in this embodiment of the present application, the first driving element 31 and the guiding mechanism 33 are located on opposite first and second sides of the lens holder 24. That is, the piezoelectric actuator 100 and the guiding mechanism 33 are located on opposite sides of the lens holder 24. Thus, the piezoelectric actuator 100 drives the lens holder 24 on the first side, while the guiding mechanism 33 guides the movement of the lens holder 24 on the second side, thereby improving the smoothness of the movement of the lens holder 24 and preventing it from tilting during movement.

[0096] It is worth mentioning that, preferably, in the embodiment of the present application, the outer diameter of the upper end of the lens holder 24 is equal to the inner diameter of the first opening 221, so that the lens holder 24 is retained within the first opening 221. In other words, the lens holder 24 fits tightly within the first opening 221. More preferably, the first opening 221 and the upper end of the lens holder 24 have a shape that is consistent with each other. This improves the sealing performance of the housing 22 and prevents dust, water vapor, and other debris from entering the interior of the housing 22 through the gap between the lens holder 24 and the first opening 221. More preferably, to further improve the sealing performance of the camera module 300, the second opening 241 of the lens holder 24 is further sealed, for example, by providing a translucent cover 25 (e.g., a glass cover) over the second opening 241. This translucent cover 25 prevents dust, water vapor, and other debris from entering the interior of the lens holder 24 through the second opening 241.

[0097] It is also worth mentioning that although Figures 1 to 3 In the illustrated example, the first lens portion 231 includes a lens barrel. However, it should be understood that in other examples of the present application, the first lens portion 231 may not be provided with the first lens barrel 2311, and the lens holder 24 may serve as a supporting component for the at least one optical lens 230 of the first lens portion 231. That is, in other examples of the present application, the first lens portion 231 only includes at least one optical lens 230, and the at least one optical lens 230 is mounted in the mounting cavity 240 of the lens holder 24.

[0098] Furthermore, in the embodiment of the present application, the second driving element 32 is implemented as a traditional electromagnetic motor, including but not limited to a shrapnel electromagnetic motor, a ball-type electromagnetic motor, etc. Specifically, the second driving element 32 includes a driving carrier having a mounting cavity 240 and a coil-magnet pair for driving the driving carrier to move, wherein the second lens portion 232 is mounted in the mounting cavity 240 of the driving carrier. Under the action of the coil-magnet pair, the driving carrier moves along the optical axis to drive the second lens portion 232 to move.

[0099] In particular, Figure 1As shown, in the embodiment of the present application, the first driving element 31 and the second driving element 32 are arranged side by side in the height direction of the camera module 300, and the second driving element 32 is located on the inner side of the first driving element 31. Such a positioning is conducive to the layout of the first driving element 31 and the second driving element 32 within the housing 22. In addition, since the first driving element 31 is a piezoelectric actuator 100 and the second driving element 32 is an electromagnetic motor, there will be no interference between the first driving element 31 and the second driving element 32. In addition, in the embodiment of the present application, the first lens portion 231 needs to be configured with a larger stroke, while the second lens portion 232 has a relatively smaller stroke. Therefore, configuring the first lens portion 231 with a piezoelectric actuator 100 and the second lens portion 232 with an electromagnetic motor can also meet the stroke requirements of both.

[0100] More specifically, if Figures 1 to 3 As shown, the second driving element 32 is disposed in a space formed by the supporting legs 242 of the lens holder 24 , so that the second driving element 32 is located inside the first driving element 31 .

[0101] It is worth mentioning that although Figures 1 to 3 In the illustrated example, the second lens portion 232 includes a lens barrel. However, those skilled in the art will appreciate that in other examples of the present application, the second lens portion 232 may not include the second lens barrel 2321, but may instead use the motor carrier of the second driving element 32 as its carrier. That is, in other examples of the present application, the second lens portion 232 may simply include at least one optical lens 230, which is mounted within the mounting cavity 240 of the motor carrier.

[0102] Furthermore, in order to prevent the first lens portion 231 and the second lens portion 232 from colliding and further limit the second lens portion 232, as shown in FIG. Figures 1 to 3 As shown, in this embodiment of the present application, the camera module 300 further includes a limiting element 26 disposed above the second lens portion 232, for limiting the maximum height to which the second lens portion 232 can move upward. It should be noted that the limiting element 26 is disposed between the first lens portion 231 and the second lens portion 232, and thus, it can also prevent the first lens portion 231 and the second lens portion 232 from crosstalk, such as collision.

[0103] Specifically, if Figures 1 to 3As shown, in this embodiment, the limiting element 26 has a limiting cavity 260 formed on its side, and the second lens barrel 2321 includes a second lens barrel body 2322 and a blocking arm 2323 extending outward from the second lens barrel body 2322 and extending into the limiting cavity 260, so that the movement of the second lens portion 232 is limited to a height range set by the limiting cavity 260 through the blocking arm 2323 and the limiting cavity 260. Specifically, when the second lens portion 232 is driven to move upward by the second driving element 32, the upper limit of its travel is when the blocking arm 2323 hits the upper surface of the limiting cavity 260. In this way, the maximum height to which the second lens portion 232 can move upward is limited.

[0104] In particular, when the camera module 300 is in a non-operating state, the first lens portion 231 can rest against the upper surface of the limiting element 26 to provide support for the first lens portion 231. Furthermore, in this manner, the space within the housing 22 can be fully utilized to reduce the overall height of the housing 22, thereby achieving a compact structure of the camera module 300.

[0105] In order to protect the second lens portion 232, as shown in FIG. Figures 1 to 3 As shown, in the embodiment of the present application, the camera module 300 further includes an isolation element 27 arranged on the periphery of the second lens part 232, and the isolation element 27 forms an isolation cavity, and the second lens part 232 is located in the isolation cavity.

[0106] In such Figures 1 to 3 In the illustrated example, the isolation element 27 and the limiting element 26 have an integrated structure. Specifically, in this example, the limiting element 26 is disposed around the periphery of the second lens portion 232 to form the isolation element 27. That is, in this example, the limiting element 26 has an annular structure, and the isolation element 27 and the limiting element 26 are the same component. It is worth noting that in other examples of the present application, the isolation element 27 and the limiting element 26 can also be implemented as separate components, which is not limited to this application.

[0107] It should be noted that if Figure 1As shown, in the embodiment of the present application, the lens holder 24 has an irregular outer surface shape, and the limiting element 26 has an irregular outer surface shape. In this way, the lens holder 24 and the limiting element 26 can cooperate with the shell 22 to form at least one winding flow channel. In this way, when external dust, water vapor and other debris enter the interior of the shell 22 through the gap, these debris can be generated and deposited in the at least one flow channel to prevent them from entering the first lens part 231 and the second lens part 232 or touching the photosensitive chip 12.

[0108] Furthermore, if Figures 1 to 3 As shown, the driving assembly 30 further includes a third driving element 34, which is configured to drive the photosensitive assembly 10 to move in a plane perpendicular to the optical axis to perform optical image stabilization. In a specific embodiment, the third driving element 34 can drive the entire photosensitive assembly 10 to move in a plane perpendicular to the optical axis to perform optical image stabilization, or the third driving element 34 can only drive the photosensitive chip 12 to move in a plane perpendicular to the optical axis to perform optical image stabilization, which is not limited to this application.

[0109] Specifically, in this embodiment of the present application, the third driving element 34 is implemented as a shape memory alloy actuator. That is, in this embodiment of the present application, the driving assembly 30 combines three motors: a piezoelectric actuator, an electromagnetic motor, and a shape memory alloy actuator to meet the optical performance adjustment requirements of the camera module 300: the piezoelectric actuator 100 and the electromagnetic motor are used to achieve optical focus and / or optical zoom functions, and the shape memory alloy actuator is used to achieve optical image stabilization.

[0110] In summary, the camera module 300 according to the embodiment of the present application is illustrated, wherein the camera module 300 staggers the contradiction between the overall height dimension and the large effective focal length of the upright camera module 300 in terms of time distribution. Specifically, the camera module 300 has a relatively small height dimension when not in operation, and has a relatively large effective focal length when in operation, so as to meet the terminal device's requirement for the overall height dimension of the camera module 300 when not in operation, and meet the requirement for a large effective focal length of the camera module 300 when in operation. More specifically, the camera module 300 uses a split lens including at least two lens parts as its imaging lens, and adjusts the relative position relationship between the at least two lens parts through a driver in the working state so that the effective focal length of the optical system formed by the at least two lens parts is within a preset range. In this way, the camera module 300 has a relatively small height dimension in the non-working state, and has a relatively large effective focal length in the working state. In this way, the technical contradiction between the overall height dimension and the larger effective focal length of the traditional upright camera module 300 is solved.

[0111] According to another aspect of the present application, a lens assembly 20 is also provided, wherein the lens assembly 20 includes an optical lens 23 provided with an optical axis, including a first lens portion 231 and a second lens portion 232 arranged along the optical axis, the first lens portion 231 including at least one optical lens 230, the second lens portion 232 including at least one optical lens 230, wherein a gap is provided between the first lens portion 231 and the second lens portion 232; and a driving assembly 30 including a first driving element 31, the first driving element 31 being configured to drive the first lens portion 231 to move along a direction set by the optical axis to adjust the first lens portion 231 and the second lens portion 232 to a predetermined position, wherein, at the predetermined position, the effective focal length of the optical system formed by the first lens portion 231 and the second lens portion 232 is within a preset range.

[0112] In the above-mentioned lens assembly 20, in a specific example, the driving assembly 30 further includes a second driving element 32, and the second driving element 32 is configured to drive the second lens part 232 to move along the direction set by the optical axis for optical focusing after the first driving element 31 adjusts the first lens part 231 and the second lens part 232 to the predetermined position; wherein, in the process of the second driving element 32 driving the second lens part 232 to move, the effective focal length of the optical system formed by the first lens part 231 and the second lens part 232 remains within the preset range.

[0113] In the above-mentioned lens assembly 20, in a specific example, the driving assembly 30 further includes a second driving element 32, which is configured to drive the second lens part 232 to move along the direction set by the optical axis to perform optical zoom after the first driving element 31 adjusts the first lens part 231 and the second lens part 232 to the predetermined position.

[0114] In the above-mentioned lens assembly 20, in a specific example, in the optical system formed by the first lens part 231 and the second lens part 232, the distance between the optical lens 230 located at the bottom of the first lens part 231 and the optical lens 230 located at the top of the second lens part 232 is the largest.

[0115] In the above-mentioned lens assembly 20, in a specific example, the lens assembly 20 further includes a base 21 and a shell 22 supported on the base 21, the shell 22 having a receiving cavity 220 and a first opening 221 connected to the receiving cavity 220, wherein the optical lens 23 is received in the receiving cavity 220 of the shell 22, the first lens portion 231 of the optical lens 23 corresponds to the first opening 221 and the aperture of the first opening 221 is larger than the outer diameter of the first lens portion 231 to allow the first lens portion 231 to extend or retract into the receiving cavity 220 through the first opening 221 under the drive of the first driving element 31.

[0116] In the above-mentioned lens assembly 20, in a specific example, the lens assembly 20 further includes a lens holder 24, the lens holder 24 having a mounting cavity 240, and a second opening 241 formed at the upper end of the lens holder 24 and connected to the mounting cavity 240, wherein the first lens part 231 is installed in the mounting cavity 240 of the lens holder 24, and the first driving element 31 is configured to drive the lens holder 24 to move along the direction set by the optical axis to drive the first lens part 231 to move along the direction set by the optical axis.

[0117] In the lens assembly 20 , in a specific example, the first driving element 31 is implemented as a piezoelectric actuator 100 .

[0118] In the lens assembly 20 , in a specific example, the driving assembly 30 further includes a guiding mechanism 33 for guiding the lens holder 24 to move along the direction set by the optical axis.

[0119] In the lens assembly 20 , in a specific example, the first driving element 31 and the guiding mechanism 33 are located on a first side and a second side opposite to each other of the lens holder 24 .

[0120] In the lens assembly 20 , in a specific example, the outer diameter of the upper end portion of the lens holder 24 is equal to the inner diameter of the first opening 221 , so that the lens holder 24 is clamped in the first opening 221 .

[0121] In the above lens assembly 20 , in a specific example, the lens assembly 20 further includes a light-transmissive cover plate 25 that seals the second opening 241 .

[0122] In the above-mentioned lens assembly 20, in a specific example, the lens bracket 24 includes a cylindrical bracket 13 body and a support leg 242 extending outward and downward from the cylindrical bracket 13 body, wherein the inner cavity of the cylindrical bracket 13 body forms the installation cavity 240.

[0123] In the lens assembly 20 , in a specific example, the second driving element 32 is implemented as an electromagnetic motor, and the second lens portion 232 is mounted on the electromagnetic motor.

[0124] In the lens assembly 20 , in a specific example, the second driving element 32 is located inside the first driving element 31 .

[0125] In the lens assembly 20 , in a specific example, the second driving element 32 is implemented as an electromagnetic motor, wherein the second driving element 32 is located inside the first driving element 31 .

[0126] In the above-mentioned lens assembly 20, in a specific example, the second driving element 32 is arranged in the space formed by the supporting legs 242 of the lens holder 24, so that the second driving element 32 is located on the inner side of the first driving element 31.

[0127] In the above lens assembly 20 , in a specific example, the lens assembly 20 further includes a limiting element 26 disposed above the second lens portion 232 , for limiting the maximum height to which the second lens portion 232 can move upward.

[0128] In the above-mentioned lens assembly 20, in a specific example, the lens further includes an isolation element 27 arranged on the periphery of the second lens part 232, and the isolation element 27 forms an isolation cavity, and the second lens part 232 is located in the isolation cavity.

[0129] Exemplary electronic devices

[0130] According to another aspect of the present application, an electronic device is also provided.

[0131] Figure 9 FIG2 is a schematic diagram of an electronic device according to an embodiment of the present application. Figure 9 As shown, the electronic device 200 according to an embodiment of the present application includes an electronic device body 210 and the camera module 300 as described above assembled in the electronic device body 210 .

[0132] In a specific implementation, the camera module 300 can be deployed on the back of the electronic device body 210 to be used as a rear camera module 300. Of course, it can also be set to the front of the electronic device body 210 to be used as a front camera module 300. The specific installation position of the camera module 300 in the electronic device body 210 is not limited by this application.

[0133] In particular, compared to the conventional upright camera module 300, the camera module 300 can extend the first lens portion 231 of the optical lens 23 in its working state to increase its total optical length until the shooting requirements are met, such as Figure 10 shown.

[0134] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A lens assembly, characterized in that: include: An optical lens having an optical axis, comprising a first lens portion and a second lens portion arranged along the optical axis, wherein the first lens portion comprises at least one optical lens, and the second lens portion comprises at least one optical lens, wherein a gap is provided between the first lens portion and the second lens portion; and a drive assembly comprising a first drive element for driving the first lens portion to move along a direction set by the optical axis and a second drive element for driving the second lens portion to move along the direction set by the optical axis, the second drive element being located inside the first drive element, wherein the first drive element is configured to drive the first lens portion to move along the direction set by the optical axis to adjust the first lens portion to a predetermined position without moving the second drive element and the second lens portion, wherein, at the predetermined position, an effective focal length of an optical system formed by the first lens portion and the second lens portion is within a preset range; The second driving element is configured to: after the first driving element adjusts the first lens section to the predetermined position, drive the second lens section to move along the direction set by the optical axis to perform optical focus or optical zoom; during the process of the second driving element driving the second lens section to move to perform optical focus, the effective focal length of the optical system formed by the first lens section and the second lens section remains within the predetermined range; The lens assembly further includes a base, a shell mounted on the base, and a limiting element, wherein the optical lens is accommodated in a receiving cavity of the shell, the base and the shell are fixed in position and do not move with the first lens part or the second lens part, and the limiting element is arranged above the second lens part and located in the receiving cavity, and is fixed in position so that the second lens part is always confined in the receiving cavity.

2. The lens assembly according to claim 1, wherein: In the imageable optical system formed by the first lens part and the second lens part, the distance between the lowest optical lens in the first lens part and the highest optical lens in the second lens part is the largest.

3. The lens assembly according to claim 1, wherein: The shell has a first opening connected to the receiving cavity, the first lens part of the optical lens corresponds to the first opening and the aperture of the first opening is larger than the outer diameter of the first lens part to allow the first lens part to extend or retract into the receiving cavity through the first opening under the drive of the first driving element.

4. The lens assembly according to claim 3, further comprising a lens holder having a mounting cavity, and a second opening formed at an upper end portion of the lens holder and communicating with the mounting cavity, wherein: The first lens part is installed in the installation cavity of the lens holder, and the first driving element is configured to drive the lens holder to move along the direction set by the optical axis to drive the first lens part to move along the direction set by the optical axis.

5. The lens assembly according to claim 4, wherein: The first driving element is arranged on the outside of the lens holder, and the second driving element is arranged on the inside of the lens holder. In this way, the second driving element is located on the inside of the first driving element.

6. The lens assembly according to claim 5, wherein: The lens holder includes a cylindrical holder body and support legs extending outward and downward from the cylindrical holder body, wherein the inner cavity of the cylindrical holder body forms an installation cavity for installing the first lens part, and the support legs cooperate with the base to form a accommodating cavity, wherein the second driving element is installed in the accommodating cavity.

7. The lens assembly according to claim 6, wherein: The first drive element is implemented as a piezoelectric actuator, and the second drive element is implemented as an electromagnetic actuator.

8. The lens assembly according to claim 5, wherein: The driving assembly further includes a guiding mechanism for guiding the lens holder to move along a direction set by the optical axis.

9. The lens assembly according to claim 8, wherein: The first driving element and the guiding mechanism are located on a first side and a second side opposite to the lens holder.

10. The lens assembly according to claim 9, wherein: The guide mechanism is mounted between the bottom surface and the top surface of the housing and passes through a guide rod of the lens holder, wherein an extending direction of the guide is consistent with a direction set by the optical axis.

11. The lens assembly according to claim 4, wherein: The outer diameter of the upper end portion of the lens holder is equal to the inner diameter of the first opening, so that the lens holder is adaptively clamped in the first opening. 12 . The lens assembly according to claim 11 , further comprising a light-transmissive cover plate sealing the second opening. 13 . The lens assembly according to claim 1 , wherein the limiting element is formed around the second lens portion to form an isolation element for isolating the second lens portion.

14. The lens assembly according to claim 13, wherein: The lens assembly further includes a lens holder having a mounting cavity, the first lens part is installed in the mounting cavity of the lens holder, and the lens holder and / or the limiting element cooperate with the shell to form at least one winding flow channel in the receiving cavity of the shell.

15. A camera module, characterized in that: include: A photosensitive component, comprising a circuit board and a photosensitive chip electrically connected to the circuit board; as well as The lens assembly according to any one of claims 1 to 14, wherein the lens assembly is held on a light-sensing path of the photosensitive component.

16. The camera module according to claim 15, wherein: The driving component further includes a third driving element, which is configured to drive the photosensitive component to move in a plane perpendicular to the optical axis to perform optical image stabilization.

17. The camera module according to claim 16, wherein: The third driving element is configured to drive the photosensitive chip of the photosensitive component to move in a plane perpendicular to the optical axis to perform optical image stabilization.

18. The camera module according to claim 16, wherein: The third drive element is implemented as a shape memory alloy drive.

Images