Patent Description:
For a terminal device, requirements for photographing and shooting capabilities continue to increase. In many scenarios, a camera module with a zoom function is required. An optical element in the camera module undergoes directional translational motion, to change a distance between the optical assembly and an optical image sensor, thereby achieving an optimal photographing effect. A camera module with a continuous zoom function is an emerging industry, and a basic principle of a continuous zoom mechanism is to change a combined focal length of an optical system through movement of two or more optical lens groups in the system. However, in a process of adjusting a focal length, an image is blurred, and image sharpness needs to be adjusted again, resulting in low image adjustment efficiency of the camera module and poor user experience. How to design a structure of a camera module that can keep a position of an image plane unchanged while maintaining good imaging quality in a zooming process is a subject of continuous exploration in the industry. <CIT> discloses a camera module that has a plurality of lenses aligned along an optic axis that receive and transmit light from a scene being imaged by the camera module. At least one lens is mounted on a platform which is movable along the optic axis and is moved by action of a piezoelectric motor. Optionally, at least one lens is mounted on a second platform which is movable along the optic axis. The second platform may be driven by a second piezoelectric motor or moved by action of the first platform. <CIT> discloses an automatic focus control apparatus for a video camera including an image pick-up element for picking up an optical image obtained through a lens system composed of a focus lens group, a zoom lens group, a focal position correction lens group and a relay lens group and a defocus detector for detecting a defocus signal corresponding to a defocus of the lens system from an image signal output from the image pickup element, a piezoelectric actuator is provided to move the image pick-up element in an optical-axis direction in accordance with the defocus signal and a motion transmission mechanism connects the image pick-up element to the relay lens group of the lens system to allow that lens group to be moved in a direction opposite to that in which the image pick-up element is moved. A stroke burden which is borne by the piezoelectric actuator can be alleviated by moving the relay lens group together with the image pick-up element.

The invention is defined by a camera module according to claim <NUM> and a mobile terminal according to claim <NUM>, so as to implement a function of continuous zooming in the camera module, and ensure high imaging quality in a zooming process.

According to a first aspect, this application provides a camera module, including a base, a guide shaft, a first piezo assembly, a second piezo assembly, and a first optical assembly and a second optical assembly that are successively slidably connected to the guide shaft in an optical axis direction, where the guide shaft is fixedly connected to the base; the first piezo assembly is connected between the base and the first optical assembly; the first piezo assembly includes a first stator and a first driven element; the first stator includes a first piezo element and a first fixing element that are fixedly connected; the first piezo element and the first fixing element may be of a sheet structure or a film structure; and the first piezo element can vibrate in an energized state, and the first fixing element fixedly connected to the first piezo element can vibrate together with the first piezo element. The first fixing element includes a first cantilever; the first cantilever is configured to amplify the vibration generated by the first piezo element in the energized state (a principle of vibration amplification is similar to a working principle of a tuning fork); the first cantilever cooperates with the first driven element to drive the first optical assembly to slide on the guide shaft; the second piezo assembly is connected between the base and the second optical assembly, or between the first optical assembly and the second optical assembly; the second piezo assembly includes a second stator and a second driven element; the second stator includes a second piezo element and a second fixing element that are fixedly connected; and a structure of the second stator may be the same as that of the first stator. The second fixing element includes a second cantilever; and the second cantilever is configured to amplify vibration generated by the second piezo element in an energized state, and cooperate with the second driven element to drive the second optical assembly to slide on the guide shaft.

In this application, the first piezo element and the second piezo element are simultaneously energized, the first piezo assembly converts electrical energy into mechanical energy, and the vibration of the first cantilever drives the first driven element to move together with the first optical assembly to achieve zooming. At the same time, the vibration of the second cantilever of the second piezo assembly drives the second driven element to move together with the second optical assembly to achieve image adjustment in the zooming process, so that the camera module can always obtain a clear image in the zooming process. In addition, in a driving manner in which the piezo element converts electric energy into mechanical energy, the camera module has advantages of a specific small volume and a light weight. In addition, the first piezo assembly and the second piezo assembly do not include a magnetic element, and therefore do not cause magnetic interference to an element such as a sensor, a loudspeaker, and an antenna around the camera module.

In a possible implementation, the first driven element is fixed to the first optical assembly, the second driven element is fixed to the second optical assembly, the first stator and the second stator are both fixed to the base, and the first stator and the second stator are distributed on a same side of the first optical assembly and the second optical assembly. In this implementation, mutually independent translational motion of the first optical assembly and the second optical assembly can be implemented, and functions of continuous zooming and image adjustment of the camera module are implemented. The first stator and the second stator are located on the same side of the first optical assembly and the second optical assembly, facilitating arrangement of power supply wiring of the camera module. The first stator and the second stator are fixedly connected to the base, the first stator and the second stator are electrically connected to a circuit on a main board of a mobile terminal by using an FPC, and the first stator and the second stator are disposed on the same side of the first optical assembly and the second optical assembly, helping reduce a risk of fatigue or fracture of the FPC.

In a possible implementation, the first driven element and the second driven element extend in the same direction as the optical axis, and the first driven element and the second driven element partially overlap. Based on such an arrangement of a positional relationship, relatively large strokes of the first driven element and the second driven element can be obtained, and the first driven element and the second driven element move in the same direction but do not interfere with each other, because they have parallel tracks. The first optical assembly and the second optical assembly have large strokes and are driven independently of each other, thereby increasing a zoom range of the camera module and improving shooting quality.

In a possible implementation, the first driven element is fixed to the first optical assembly, the second driven element is fixed to the second optical assembly, the first stator and the second stator are both fixed to the base, and the first stator and the second stator are distributed on two sides of the first optical assembly and the second optical assembly. The mutually independent translational motion of the first optical assembly and the second optical assembly can be implemented, and the first stator and the second stator are disposed on two sides of the first optical assembly and the second optical assembly, so that assembly space is relatively large, and the first piezo assembly and the second piezo assembly are independent of each other without interference.

In a possible implementation, the base includes a pair of side plates disposed oppositely, the base includes a front end face for mounting a lens and a rear end face for mounting an image sensor, the pair of side plates extend between the front end face and the rear end face, and the first stator and the second stator are respectively fixed to middle regions of the pair of side plates, where the middle region is a region on the side plate having equal distances from the front end and the rear end. Because the driven elements (that is, the first driven element and the second driven element) are relatively long, the stators (the first stator and the second stator) are placed in the middle regions, thereby reducing motion space occupied by the driven elements when they move. Specifically, during positioning of the first stator and the second stator, a middle section of the camera module is first found; a middle cross section is found by using the front and rear end faces of the base as a reference, and the middle cross section is used as the middle section of the camera module; and the first stator and the second stator are fixed by using the middle section as a mounting reference.

According to the invention, the first driven element is fixed to the first optical assembly, the first stator is fixed to the base, the second driven element is fixed to the second optical assembly, and the second stator is fixed to the first optical assembly. In this way, linkage between the first optical assembly and the second optical assembly can be implemented, so that the camera module has a relatively good continuous zoom function, and position precision of the second optical assembly relative to the first optical assembly can be improved, thereby improving an imaging effect after zooming.

In a possible implementation, the first stator and the second stator are respectively located on two sides of the first optical assembly, so that relatively large space can be provided for mounting the first stator and the second stator, positions of the first stator and the second stator are independent of each other, and avoidance does not need to be considered in a design and assembly process, thereby improving manufacturing efficiency and reducing design difficulty.

In a possible implementation, the first driven element and the second driven element are fixed to the base, the first driven element and the second driven element are in a track shape, the first optical assembly and the second optical assembly are slidably connected to the first driven element and the second driven element, the first stator is fixed to the first optical assembly, and the second stator is fixed to the second optical assembly. In this implementation, stability of movement of the first optical assembly and the second optical assembly can be improved. In addition, a driven track has functions of both a movable track and a driven element, thereby effectively saving accommodating space of the camera module, and facilitating development of the camera module with a small volume and a light weight.

In a possible implementation, the first stator and the second stator are located on a same side of the first optical assembly and the second optical assembly. In this implementation, mutually independent translational motion of the first optical assembly and the second optical assembly can be implemented, and functions of continuous zooming and image adjustment of the camera module are implemented. The first stator and the second stator are located on the same side of the first optical assembly and the second optical assembly, facilitating arrangement of power supply wiring of the camera module. The first stator and the second stator are fixedly connected to the base, the first stator and the second stator are electrically connected to a circuit on a main board of a mobile terminal by using an FPC, and the first stator and the second stator are disposed on the same side of the first optical assembly and the second optical assembly, helping reduce a risk of fatigue or fracture of the FPC.

In an implementation, the first piezo assembly includes a first holder, which is configured to mount the first optical assembly; the first holder includes a first body, a second body, and a connection part; the first body and the second body are relatively spaced apart, and accommodating space is formed between the first body and the second body; and the accommodating space is used to accommodate the first optical assembly. The accommodating space has an open opening in a region between a top surface of the first body and a top surface of the second body. The first optical assembly partially extends into the accommodating space from a position of the opening. A mounting part of the first optical assembly is attached to the top surface of the first body and the top surface of the second body.

Specifically, the first body includes a first surface facing the second body, and the first surface is used to carry the first optical assembly; the second body includes a second surface facing the first body, and similarly, the second surface is used to carry the first optical assembly, and a bevel segment or an arc segment on the first surface and a bevel segment or an arc segment on the second surface are symmetrically disposed. When the first optical assembly is mounted to the first holder, the first surface and the second surface are separately attached to an outer surface of a body part of the first optical assembly, and a buffer material such as foam may be disposed at an attachment position, so as to prevent the first optical assembly from shaking during use of the camera module. In another implementation, the surfaces on which the first body and the second body are attached to the first optical assembly may alternatively be disposed as soft glue. The soft glue has an elastic deformation capability, so that elastic contact may be formed between the first optical assembly and the first holder, and the first optical assembly and the first holder are not easy to shake, preventing the first optical assembly from shaking during use of the camera module.

In a possible implementation, the first piezo assembly further includes a first adapter and a first power supply element, and the first stator and the first power supply element are respectively fixed to two opposite sides of the first adapter. The first stator and the first power supply element are assembled into an integral module structure by using the first adapter, facilitating assembly and improving assembly precision.

In a possible implementation, the first fixing element includes a body, a fixing part, and the first cantilever; the first piezo element is fixed on both front and back surfaces of the body; both the fixing part and the first cantilever extend out of an edge of the body; the fixing part fixes the first stator to the first adapter, and forms a gap between the first piezo element and the first adapter.

In a possible implementation, a quantity of the first stators is two or more; in an extension direction of the optical axis, the two or more first stators are arranged in a row; and a quantity of contact regions of the first driven element that cooperate with the first cantilever is two, and the two contact regions are distributed on two sides of the two or more first stators.

In a possible implementation, a quantity of the first stators is two or more; the first stators are disposed in an overlapping manner, and a quantity of the first cantilevers is equal to or greater than a quantity of the first stators; and a quantity of contact regions of the first driven element that cooperate with the first cantilever is two, and the two contact regions are distributed on two sides of the two or more first stators.

In a possible implementation, a quantity of the first stators is two or more; in an extension direction of the optical axis, the two or more first stators are arranged in a row; and a quantity of contact regions of the first driven element that cooperate with the first cantilever is one, and the contact region is distributed on a same side of the two or more first stators.

In a possible implementation, a quantity of the first stators is two; and a quantity of contact regions of the first driven element that cooperate with the first cantilever is one, and the two first stators are symmetrically distributed on two sides of the contact region.

Structures of the first fixing element and the second fixing element may be the same. The first fixing element includes a body, a fixing part, and a first cantilever; a shape of the body is similar to that of the first piezo element; and both the front and back surfaces of the body are used for bonding the first piezo element. Both the fixing part and the first cantilever extend out of the edge of the body. Specifically, a quantity of fixing parts is two, and the two fixing parts are respectively connected to middles of two opposite side edges of the body to provide a balanced supporting force for the body; and the fixing parts are configured to fix the first stator to the first adapter and form a gap between the first stator and the first adapter. In other words, the first piezo element of the first stator is not in contact with the first adapter, so that vibration can be generated by the first piezo element in an energized state.

At a position between the two adjacent first stators, two fixing parts respectively extend out of the bodies of the two first fixing elements and partially overlap.

In a possible implementation, the first driven element includes a fixing region and a contact region forming a hollow region with the fixing region; the fixing region is used to be fixedly connected to the first optical assembly; and the contact region is in contact with the first cantilever, and applies an elastic pre-stress to the first cantilever.

In a possible implementation, there are two contact regions, which are symmetrically disposed on two sides of the fixing region. The two contact regions are both provided with grooves, openings of the two grooves are opposite to each other, and a free end of the first cantilever extends into the groove and cooperates with the contact region.

In a possible implementation, two ends of each contact region are separately connected to the fixing region by using a connection region, and each connection region includes a first connection segment, a second connection segment, and a third connection segment that are successively connected between the fixing region and the contact region. The first connection segment is used to provide disturbance during the movement of the first driven element, and a size of a cross section of the third connection segment is smaller than a size of a cross section of the second connection segment and a size of a cross section of the contact region, so as to provide an elastic deformation capability of the contact region.

In a possible implementation, the camera module further includes a first position sensor, a second position sensor, and a position element; the first position sensor is fixed to the base, the position element is fixedly connected to the first optical assembly and is located on a side of the first optical assembly facing the first position sensor; the second position sensor is fixed to the second optical assembly, a moving distance or a position of the first optical assembly is determined through cooperation between the first position sensor and the position element, and a moving distance or a position of the second optical assembly is determined through cooperation between the second position sensor and the position element.

Specifically, the position element may be a magnetic element (for example, a magnet), the position element is in a strip shape, a part of the position element faces the first optical assembly on a plane perpendicular to the optical axis, and a part of the position element extends to the outside of the first optical assembly in a direction of the second optical assembly.

In a possible implementation, the first position sensor, the second position sensor, and the position element form at least a part of the position detection assembly; and the position detection assembly and the first stator are respectively disposed on two sides of the first optical assembly, or the position detection assembly and the first stator are located on a same side of the first optical assembly.

According to a second aspect, a mobile terminal provided in this application includes a controller and the camera module provided in any one of the foregoing implementations, and the first stator and the second stator are electrically connected to the controller, to supply power to the first piezo element and the second piezo element.

To describe technical solutions in embodiments of this application or in the background more clearly, the following describes accompanying drawings for describing the embodiments of this application or the background.

The following describes embodiments of this application with reference to accompanying drawings in the embodiments of this application.

A camera module used in this application is applied to a mobile terminal, and the mobile terminal may be a smartphone, a tablet computer, a vehicle-mounted monitoring device, or the like. As shown in <FIG>, a smartphone is used as an example. In this implementation, a mobile terminal <NUM> includes a camera module <NUM>, where the camera module <NUM> may be a rear-facing camera, or may be a front-facing camera. The camera module <NUM> drives an optical assembly by using a piezo assembly (a piezo motor), to implement a continuous zoom function, and ensure that an image is clear in a zooming process. A main board <NUM> in the mobile terminal supplies power to the piezo motor of the camera module <NUM>, and a controller C on the main board <NUM> obtains specific position information of the optical assembly in the camera module <NUM>. During use, the piezo motor drives the optical assembly to move, so that a focal length and an image can be adjusted based on a scenario requirement, to obtain a high-quality imaging effect.

The camera module provided in this application includes a base, a guide shaft, a first piezo assembly, a second piezo assembly, and a first optical assembly and a second optical assembly that are successively slidably connected to the guide shaft in an optical axis direction, where the guide shaft is fixedly connected to the base; the first piezo assembly is connected between the base and the first optical assembly, the first piezo assembly includes a first stator and a first driven element, the first stator includes a first piezo element and a first fixing element that are fixedly connected, a first cantilever of the first fixing element amplifies vibration generated by the first piezo element in an energized state, and the first cantilever cooperates with the first driven element to drive the first optical assembly to slide on the guide shaft, so as to implement zooming of the camera module; the second piezo assembly is connected between the base and the second optical assembly, or between the first optical assembly and the second optical assembly, the second piezo assembly includes a second stator and a second driven element, the second stator includes a second piezo element and a second fixing element that are fixedly connected, a second cantilever of the second fixing element amplifies vibration generated by the second piezo element in an energized state, and the second cantilever cooperates with the second driven element to drive the second optical assembly to slide on the guide shaft, so as to adjust an effect of an image shot by the camera module and ensure that the image of the camera module is clear during zooming.

The first piezo assembly and the second piezo assembly in the camera module of this application are respectively used as piezo motors for driving the first optical assembly and the second optical assembly to move. The stator part in the piezo assembly is used as a power source. Specifically, the stator includes a piezo element and a fixing element, and the piezo element is made of a piezo material, such as piezo ceramic. By using a property of the piezo material for converting electric energy into mechanical energy, the piezo element generates vibration in an energized state, and the cantilever of the fixing element amplifies the vibration and drives the optical assembly to move, so that the camera module moves. In this way, the camera module has advantages of a specific small volume and a light weight. In addition, the first piezo assembly and the second piezo assembly do not include a magnetic element, and therefore do not cause magnetic interference to an element such as a sensor, a loudspeaker, and an antenna around the camera module.

In this application, there are a plurality of different implementations for a specific structure and position layout of the piezo assembly in the camera module, where "the first piezo assembly is connected between the base and the first optical assembly" includes: a first stator is fixed to the base, the first driven element is fixed to the first optical assembly (for details, refer to Embodiment <NUM>, Embodiment <NUM>, and Embodiment <NUM> below). Alternatively, the first stator is fixed to the first optical assembly and the first driven element is fixed to the first base (for details, refer to Embodiment <NUM> below, where a driven track is equivalent to the first driven element). "The second piezo assembly is connected between the base and the second optical assembly, or between the first optical assembly and the second optical assembly" includes: a second stator is fixed to the second base, the second driven element is fixed to the second optical assembly (for details, refer to Embodiment <NUM> and Embodiment <NUM> below). Alternatively, the second stator is fixed to the second optical assembly and the second driven element is fixed to the second base (for details, refer to Embodiment <NUM> below, where the driven track is equivalent to the first driven element). According to the invention, the second stator is fixed to the first optical assembly, and the second driven element is fixed to the second optical assembly (for details, refer to Embodiment <NUM> below).

The manner of "fixing" or "fixed connection" described in this application is not limited to direct fixed connection or indirect fixed connection by using another adapter.

This application is described in detail by using the following four main embodiments (Embodiment <NUM>, Embodiment <NUM>, Embodiment <NUM>, and Embodiment <NUM>).

As shown in <FIG>, <FIG>, the camera module <NUM> includes a base <NUM> and a housing <NUM>. The base <NUM> includes a bottom plate <NUM> and a pair of side plates <NUM>. The bottom plate <NUM> is substantially rectangular, and the pair of side plates <NUM> are located on a pair of opposite edges of the bottom plate <NUM>. A front end face <NUM> and a rear end face <NUM> of the base <NUM> are formed on another pair of opposite edges of the bottom plate <NUM>, and between the pair of side plates <NUM>. An opening is provided at positions of both the front end face <NUM> and the rear end face <NUM>. The position of the opening <NUM> of the front end face <NUM> is used for mounting a lens, and the position of the opening <NUM> of the rear end face <NUM> is used for mounting an image sensor. The pair of side plates <NUM> extend between the front end face <NUM> and the rear end face <NUM>. The bottom plate <NUM> and the pair of side plates <NUM> jointly enclose accommodating space. The housing <NUM> covers the base <NUM> and seals the accommodating space on the top of the base <NUM>.

A notch is disposed at a position at which the housing <NUM> and the base <NUM> are connected. There are two notches, which are distributed on a same side of the base <NUM>. The notch is configured to communicate with the accommodating space and the outside, and is used for an FPC to pass through the notch, so as to electrically connect the camera module <NUM> and the main board of the mobile terminal. In this implementation, a first groove <NUM> and a second groove <NUM> are disposed on the top that is of a side plate <NUM> of the base <NUM> and that is away from the bottom plate <NUM>, and a first notch <NUM> and a second notch <NUM> are disposed on one side arm of the housing <NUM>. After the housing <NUM> is mounted to the base <NUM>, the first notch <NUM> and the first groove <NUM> are directly opposite to and communicate with each other, so as to form a notch communicating with the accommodating space and the outside. Similarly, the second notch <NUM> and the second groove <NUM> are directly opposite to and communicate with each other, so as to form a notch communicating with the accommodating space and the outside.

Other elements of the camera module <NUM> are disposed in the accommodating space. The elements disposed in the accommodating space include a guide shaft <NUM>, a first optical assembly <NUM>, a second optical assembly <NUM>, a first position sensor <NUM>, a second position sensor <NUM>, a first piezo assembly <NUM>, and a second piezo assembly <NUM>.

The guide shaft <NUM> is fixedly connected to the base <NUM>. There are at least two guide shafts <NUM>, which are disposed in parallel, and the guide shafts <NUM> are all parallel to the optical axis of the camera module <NUM>. In the embodiments shown in <FIG>, <FIG>, a quantity of guide shafts <NUM> is four. Two guide shafts <NUM> are first shafts <NUM>, and the first shafts <NUM> are fixed at positions close to the bottom plate <NUM> of the base <NUM>, and may be designed as an integral structure with the base <NUM>. The other two guide shafts <NUM> are second shafts <NUM>, and the second shafts <NUM> are fixed to positions that are inside the base <NUM> and that are close to the housing <NUM> opposite to the bottom plate <NUM>. A fixing groove <NUM> is provided in the base <NUM> and two ends of the second shaft <NUM> are fixed in the fixing groove <NUM>. The two first shafts <NUM> are used for mounting the first piezo assembly <NUM> and the second piezo assembly <NUM>, and the two second shafts <NUM> are used for mounting the first optical assembly <NUM> and the second optical assembly <NUM>.

The first optical assembly <NUM> and the second optical assembly <NUM> are successively distributed between an object side and an image side in the optical axis direction and are slidably connected to the guide shaft <NUM> (specifically, the second shaft <NUM>). An extension direction of the optical axis is a direction in which the front end face <NUM> and the rear end face <NUM> of the base <NUM> extend vertically, the object side is a position at which an object photographed by the camera module <NUM> is located, the front end face <NUM> of the base <NUM> faces the object side, and the rear end face <NUM> of the base <NUM> is an image side, that is, a position at which the image sensor is disposed.

The first optical assembly <NUM> includes a body part <NUM> and two mounting parts <NUM>. The body part <NUM> includes an object-side surface S1 and an image-side surface (unlabelled, which is a surface facing an object side surface S3 of the second optical assembly <NUM> in <FIG>). The body part <NUM> is an optical element integration region for light transmission. The two mounting parts <NUM> are symmetrically disposed on two sides of the body part <NUM>, and are connected to positions on the top of the body part <NUM>. Each of the two mounting parts <NUM> is provided with a through hole (unlabelled, that is, a region through which the second shaft <NUM> passes). An extension direction of the through hole is consistent with the extension direction of the optical axis. Each of the two mounting parts <NUM> includes a positioning surface <NUM>, and the positioning surface <NUM> faces the bottom of the body part <NUM>. The positioning surfaces <NUM> of the two mounting parts <NUM> are coplanar and used for mounting the first optical assembly <NUM> to the first piezo assembly <NUM>.

The second optical assembly <NUM> also includes a body part <NUM> and two mounting parts <NUM>. The body part <NUM> of the second optical assembly <NUM> is an optical element integration region and is used for light transmission. A specific structure of the body part <NUM> of the second optical assembly <NUM> may be different from a specific structure of the body part <NUM> of the first optical assembly <NUM>. For example, the body part <NUM> of the second optical assembly <NUM> and the body part <NUM> of the first optical assembly <NUM> have different types of lens composition. Functions of the body part <NUM> of the first optical assembly <NUM> and the body part <NUM> of the second optical assembly <NUM> may be different. For example, in an implementation, the position of the body part <NUM> of the first optical assembly <NUM> is adjusted for zooming of the camera module <NUM>, and the position of the body part <NUM> of the second optical assembly <NUM> is adjusted for adjusting an image effect. The mounting part <NUM> of the first optical assembly <NUM> and the mounting part <NUM> of the second optical assembly <NUM> may have the same structure, and the through hole on the mounting part <NUM> of the second optical assembly <NUM> is collinear with the through hole on the mounting part of the first optical assembly <NUM>. The guide shaft <NUM> (the second shaft <NUM>) successively passes through the through hole on the mounting part <NUM> of the first optical assembly <NUM> and the through hole on the mounting part <NUM> of the second optical assembly <NUM>, so that the first optical assembly <NUM> and the second optical assembly <NUM> are connected in series to the second shaft <NUM>.

The first piezo assembly <NUM> includes a first holder <NUM>, a position element <NUM>, a first driven element <NUM>, a first stator <NUM>, a first adapter <NUM>, and a first power supply element <NUM>.

The first holder <NUM> is configured to mount the first optical assembly <NUM>. The first holder <NUM> includes a first body <NUM>, a second body <NUM>, and a connection part <NUM>. The first body <NUM> and the second body <NUM> are relatively spaced apart, and accommodating space C1 is formed between the first body <NUM> and the second body <NUM>. The accommodating space C1 is used to accommodate the first optical assembly <NUM>. A top surface A1 of the first body <NUM> and a top surface A2 of the second body <NUM> are coplanar. Specifically, the top surface A1 of the first body <NUM> is provided with two mounting pads P1, and the top surface A2 of the second body <NUM> is provided with two mounting pads P2. The four mounting pads P1 and P2 are intended to correct flatness of the top surface of the first body <NUM>, and the first optical assembly <NUM> is mounted on the mounting pads P1 and P2. The connection part <NUM> is connected between the bottom surface of the first body <NUM> and the bottom surface of the second body <NUM>. Specifically, the first body <NUM> and the second body <NUM> are plastic parts, and the connection part <NUM> is a metal plate. The accommodating space C1 has an open opening in a region between the top surface A1 of the first body <NUM> and the top surface A2 of the second body <NUM>.

The first optical assembly <NUM> partially extends into the accommodating space C1 from a position of the opening. The mounting part <NUM> of the first optical assembly <NUM> is attached to the top surface A1 of the first body <NUM> and the top surface A2 of the second body <NUM>. The first optical assembly <NUM> is fixed to the first holder <NUM> by using a positioning surface on the mounting part <NUM>, which is attached to the top surface A1 of the first body <NUM> and the top surface A2 of the second body <NUM>, and is fixed by adhesive.

The first body <NUM> includes a first surface <NUM> facing the second body <NUM>, and the first surface <NUM> may include a bevel segment or an arc segment for carrying the body part <NUM> of the first optical assembly <NUM>. The second body <NUM> includes a second surface <NUM> facing the first body <NUM>, and similarly, the second surface <NUM> may include a bevel segment or an arc segment for carrying the body part of the first optical assembly <NUM>. The bevel segment or the arc segment on the first surface <NUM> is symmetrically disposed with the bevel segment or the arc segment on the second surface <NUM>. When the first optical assembly <NUM> is mounted to the first holder <NUM>, the first surface <NUM> and the second surface <NUM> are separately attached to an outer surface of a body part <NUM> of the first optical assembly <NUM>, and a buffer material such as foam may be disposed at an attachment position, so as to prevent the first optical assembly <NUM> from shaking during use of the camera module <NUM>. In another implementation, the surfaces on which the first body <NUM> and the second body <NUM> are attached to the first optical assembly <NUM> may alternatively be disposed as soft glue. The soft glue has an elastic deformation capability, so that elastic contact may be formed between the first optical assembly <NUM> and the first holder, and the first optical assembly <NUM> and the first holder are not easy to shake, preventing the first optical assembly <NUM> from shaking during use of the camera module <NUM>. The bottom of the first body <NUM> and the bottom of the second body <NUM> are respectively provided with grooves <NUM> and <NUM>, and shapes of the grooves <NUM> and <NUM> match shapes of the two first shafts <NUM>. The first holder <NUM> may be positioned within the base <NUM> through cooperation between the grooves <NUM> and <NUM> and the first shafts <NUM>. In this way, the first optical assembly <NUM> and the first piezo assembly <NUM> are more firmly assembled in the base <NUM>, and a zooming process of the camera module <NUM> is more balanced during use, and the camera module <NUM> is not easy to shake.

The position element <NUM> is fixedly connected to the surface of the first body <NUM> facing away from the second body <NUM>. The position element <NUM> may be a magnetic element (for example, a magnet). In this implementation, the position element <NUM> is in a strip shape. A part of the position element <NUM> faces the first optical assembly <NUM> on a plane perpendicular to the optical axis, and a part of the position element <NUM> extends to the outside of the first optical assembly <NUM> in a direction toward the second optical assembly <NUM>. Specifically, the first body <NUM> includes a strip-shaped fixing part <NUM>, the position element <NUM> is fixed to the strip-shaped fixing part <NUM>, the position element <NUM> is a magnetic element, the strip-shaped fixing part <NUM> is a plastic part, and the position element <NUM> and the strip-shaped fixing part <NUM> are fixed by adhesive.

With reference to <FIG>, the first position sensor <NUM> is fixed on the base <NUM>. Specifically, the first position sensor <NUM> is fixed to an inner surface of the side plate <NUM> of the base <NUM>, and the first position sensor <NUM> is disposed opposite to the position element <NUM>. The position element <NUM> is configured to cooperate with the first position sensor <NUM> to determine a moving distance or a position of the first optical assembly <NUM>. Specifically, the first position sensor <NUM> is a Hall sensor (Hall sensor), the first position sensor <NUM> is fixed on the base <NUM>, the position element <NUM> is fixed on the first holder <NUM>, and the first holder <NUM> moves synchronously with the first optical assembly <NUM>. The position element <NUM> and the first position sensor <NUM> are respectively fixed on a movable assembly and a static assembly. When positions of the position element <NUM> and the first position sensor <NUM> move relative to each other, a magnetic field on a surface of the first position sensor <NUM> changes with the relative motion, and the first position sensor <NUM> generates a corresponding current with the change of the magnetic field. A control circuit on the main board of the mobile terminal determines the moving distance and the position of the first optical assembly <NUM> based on a magnitude of the current.

As shown in <FIG> and <FIG>, the first driven element <NUM> and the position element <NUM> are located on two opposite sides of the first holder <NUM>, respectively. The first driven element <NUM> may be fixedly connected to the surface of the second body <NUM> facing away from the first body <NUM> by adhesive, or the first driven element <NUM> and the second body <NUM> may be disposed as an integral structure, which is formed through integral molding. In an implementation, the second body <NUM> is a plastic part, and the first driven element <NUM> is a metal part. The first driven element <NUM> includes a fixing part <NUM> and a pair of contact regions <NUM>. The fixing part <NUM> is configured to be fixedly connected to the second body <NUM> of the first holder <NUM>, and the pair of contact regions <NUM> are located on two opposite sides of the fixing part <NUM>, and are bent and extended in a same direction from the surface of the fixing part <NUM>. When the first driven element <NUM> is a metal part, the contact region may be formed by using a manufacturing process of bending a sheet metal part in which the top and the bottom of the fixing part <NUM> are bent in the same direction. Each contact region <NUM> is bent to form a groove, and openings of two grooves are oppositely disposed. The contact region <NUM> is configured to cooperate with the first cantilever of the first stator <NUM> so that the first stator <NUM> drives the first driven element <NUM> to translate.

The first stator <NUM> is fixedly connected to the first adapter <NUM> and the first power supply element <NUM> to form at least a part of the driving assembly. In other words, the driving assembly may further include elements other than these three elements, such as a conductive part and an elastic part. In this implementation, the driving assembly is fixedly connected to the side plate <NUM> of the base <NUM>, the first power supply element <NUM> passes through the side plate <NUM> and the housing <NUM> and is electrically connected to the main board of the mobile terminal, the first stator <NUM> is in contact with and cooperates with the first driven element <NUM>, and the first adapter <NUM> is connected between the first stator <NUM> and the first power supply element <NUM>.

Refer to <FIG> and <FIG>. Specifically, the first power supply element <NUM> is an FPC, and the first power supply element <NUM> includes an external connector <NUM>, a first electrode <NUM>, and a second electrode <NUM>. The external connector <NUM> extends out of the base <NUM> and the housing <NUM>. The first electrode <NUM> and the second electrode <NUM> are electrically connected to the first stator <NUM> by bypassing the first adapter <NUM>, so as to supply power to the first stator <NUM>. In this implementation, the first power supply element <NUM> includes a main FPC <NUM>, a first conductive part <NUM>, and a second conductive part <NUM>. The main FPC <NUM>, the first adapter <NUM>, and the first stator <NUM> are successively stacked, and the external connector <NUM> is disposed on the main FPC. The first conductive part <NUM> is made of a flexible material, such as a conductive film or an FPC. The first electrode <NUM> is formed on the first conductive part <NUM>, one end of the first conductive part <NUM> is electrically connected to an edge position of the main FPC and bypasses a periphery of the first adapter <NUM>, and the first electrode <NUM> is fixed on a surface of the first stator <NUM> facing away from the main FPC <NUM>. The second electrode <NUM> is formed on the second conductive part <NUM>. One end of the second conductive part <NUM> is fixed through a through hole in the main FPC <NUM>, and is electrically connected to a surface of the main FPC <NUM> facing the side plate <NUM> of the base <NUM>. The other end of the second conductive part <NUM> is the second electrode <NUM>, and the second electrode <NUM> is fixed through the first adapter <NUM> and is electrically connected to the first stator <NUM>.

The first stator <NUM> includes a first piezo element <NUM> and a first fixing element <NUM> that are fixedly connected. The first piezo element <NUM> and the first fixing element <NUM> may be of a sheet structure or a thin film structure. The first piezo element <NUM> can generate vibration in an energized state, and the first fixing element <NUM> fixedly connected to the first piezo element <NUM> can also vibrate together. In another implementation, the first piezo element <NUM> may alternatively be formed by laminating and bonding a plurality of thin piezo films (or piezo elements). In this implementation, there are two first piezo elements <NUM>, which are distributed on two sides of the first fixing element <NUM>, and the first fixing element <NUM> is sandwiched between the two first piezo elements <NUM> and fixed by adhesive. Within the base <NUM>, one first piezo element <NUM> faces the first adapter <NUM>, and the other first piezo element <NUM> faces the fixing part <NUM> of the first driven element <NUM>. The first piezo element <NUM> is made of a piezo ceramic material, and the first fixing element <NUM> is made of a metal material.

As shown in <FIG>, the first fixing element <NUM> includes a body <NUM>, a fixing part <NUM>, and a first cantilever <NUM>. A shape of the body <NUM> is similar to that of the first piezo element <NUM>, and both front and back surfaces of the body <NUM> are used to bond the first piezo element <NUM>. Both the fixing part <NUM> and the first cantilever <NUM> extend out of the edge of the body <NUM>. Specifically, there are two fixing parts <NUM>, and the two fixing parts <NUM> are respectively connected to middles of two opposite side edges of the body <NUM>, to provide a balanced supporting force for the body <NUM>. For example, the body <NUM> is substantially rectangular, two fixing parts <NUM> extend out of the middle of a long side of the body <NUM>, and the fixing parts <NUM> are configured to fix the first stator <NUM> to the first adapter <NUM>, so that a gap is formed between the first stator <NUM> and the first adapter <NUM>. In other words, the first piezo element <NUM> of the first stator <NUM> is not in contact with the first adapter <NUM>. This can ensure that the first piezo element <NUM> vibrates when the first piezo element <NUM> is energized. The fixing part <NUM> includes a connection arm L1 and a fixing leg L2. The connection arm L1 is connected between the body <NUM> and the fixing leg L2. The fixing leg L2 is fixedly connected to the first adapter <NUM>. The connection arm L1 supports the body <NUM> together with the first piezo element <NUM> from the first adapter <NUM>. The first cantilever <NUM> extends out of the body <NUM>, and the first cantilever <NUM> cooperates with the first driven element <NUM>. Specifically, the first cantilever <NUM> extends into the groove of the contact region <NUM> of the first driven element <NUM> and abuts against the contact region <NUM>. The first piezo element <NUM> vibrates in an energized state, the vibration of the first piezo element <NUM> is amplified by the first cantilever <NUM> of the first fixing element <NUM>, and a free end of the first cantilever <NUM> is in contact with the surface of the contact region <NUM> in an elliptic motion in the groove. The elliptic motion of the free end of the first cantilever <NUM> can drive the first driven element <NUM> to move in the direction of the guide shaft <NUM>, and further drive the first optical assembly <NUM> to slide on the guide shaft <NUM>. In this application, the first stator <NUM>, the first adapter <NUM>, and the first power supply element <NUM> are assembled into one module, and then the module is assembled in the base <NUM>.

Refer to <FIG> and <FIG>. In this implementation, a structure of the second piezo assembly <NUM> is substantially the same as that of the first piezo assembly <NUM>, and the second piezo assembly <NUM> includes a second holder <NUM>, a second driven element <NUM>, a second stator <NUM>, a second adapter <NUM>, and a second power supply element <NUM>. The structure of the second holder <NUM> is the same as that of the first holder <NUM>, and the second optical assembly <NUM> is mounted on the first body <NUM> and the second body <NUM> of the second holder <NUM> and partially extends into accommodating space C2 between the first body <NUM> and the second body <NUM> of the second holder <NUM>. A main difference between the second piezo assembly <NUM> and the first piezo assembly <NUM> is that the second piezo assembly <NUM> does not include a position element, the second position sensor <NUM> is fixed to the first body <NUM> of the second holder <NUM>, the second position sensor <NUM> faces the side plate <NUM> of the base <NUM>, and the second position sensor <NUM> and the position element <NUM> of the first piezo assembly <NUM> are located on a same side of the first optical assembly <NUM> and the second optical assembly <NUM>. The first position sensor <NUM> and the second position sensor <NUM> share a position element <NUM>. The second position sensor <NUM> and the position element <NUM> are disposed on the second optical assembly <NUM> and the first optical assembly <NUM>, respectively. When the second optical assembly <NUM> moves relative to the first optical assembly <NUM> (which may be understood that the first optical assembly <NUM> does not move, and the second optical assembly <NUM> moves, or both the second optical assembly <NUM> and the first optical assembly <NUM> move, but there is relative displacement between them), a magnetic field on the surface of the second position sensor <NUM> changes, and a current is generated. A moving distance and a position of the second optical assembly <NUM> are further determined based on a magnitude of the current. In this application, the second optical assembly <NUM> is configured to adjust sharpness of an image of the camera module in a zooming process, and a requirement on position precision of the second optical assembly <NUM> is relatively high. In this implementation, the second position sensor <NUM> is fixedly connected to the second optical assembly <NUM>, helping improve position detection precision of the second optical assembly <NUM>, implementing more accurate position detection, and ensuring higher efficiency of adjusting image sharpness.

In the second piezo assembly <NUM>, the second stator <NUM>, the second adapter <NUM>, and the second power supply element <NUM> are fixedly connected to form at least a part of the driving assembly. Structures of the second stator <NUM>, the second adapter <NUM>, and the second power supply element <NUM> are the same as those of the first stator <NUM>, the first adapter <NUM>, and the first power supply element <NUM>. The second driven element <NUM> and the first driven element <NUM> are located on a same side of the first optical assembly <NUM> and the second optical assembly <NUM>. Similarly, the driving assembly in the second piezo assembly <NUM> and the driving assembly in the first piezo assembly <NUM> are also located on a same side of the first optical assembly <NUM> and the second optical assembly <NUM>.

The external connector <NUM> of the second power supply element <NUM> also extends out of the base <NUM> and the housing <NUM>, and is configured to connect to a circuit on the main board of the mobile terminal. The external connector <NUM> of the first power supply element <NUM> and the external connector <NUM> of the second power supply element <NUM> extend out of the camera module <NUM> from a same side of the base <NUM> and the housing <NUM>, and may be electrically connected between the external connector and the circuit on the main board by using an FPC or another electrical connection cable, so as to supply power to the camera module <NUM>.

In an implementation, a controller is disposed on the main board, and the controller is electrically connected to the first power supply element <NUM> and the second power supply element <NUM> to provide a high frequency power signal (approximately <NUM>-<NUM>) for the camera module <NUM>. Under excitation of the high frequency power signal, the first piezo element of the first stator <NUM> generates elastic vibration, and the vibration is amplified by the first cantilever, and the first driven element <NUM> is driven to move, so that the first optical assembly <NUM> moves along the optical axis to zoom the camera module <NUM>. In the zooming process, the second piezo element of the second stator <NUM> generates elastic vibration by supplying power to the second power supply element <NUM>, the elastic vibration is amplified by the second cantilever of the second fixing element, and the second driven element <NUM> together with the second optical assembly <NUM> is driven to move, thereby adjusting the image so that the image always remains clear in the zooming process.

During the movement of the first optical assembly <NUM>, the first position sensor <NUM> and the position element <NUM> move relatively, the magnetic field on the surface of the first position sensor <NUM> changes with the relative motion, and the first position sensor <NUM> generates a corresponding current with the change of the magnetic field. A control circuit on the main board of the mobile terminal determines the moving distance and the position of the first optical assembly <NUM> based on a magnitude of the current. During the movement of the second optical assembly <NUM>, a relative position exists between the second optical assembly <NUM> and the first optical assembly <NUM>, that is, relative motion occurs between the position element <NUM> and the second position sensor <NUM>, a magnetic field on a surface of the second position sensor <NUM> changes with the relative motion, and the second position sensor <NUM> generates a corresponding current with the change of the magnetic field. The control circuit on the main board of the mobile terminal determines the moving distance and the position of the second optical assembly <NUM> based on a magnitude of the current. Based on effects of the first piezo assembly <NUM> and the second piezo assembly on the first optical assembly <NUM> and the second optical assembly <NUM>, and in combination with the arrangement of the first position sensor <NUM> and the second position sensor <NUM>, in this application, the two optical assemblies in the optical system are configured to move linearly along the path given by the optical design, to change the combined focal length of the overall optical system while keeping the position of the image plane unchanged, and always keeping the image clear during continuous zooming.

In this implementation, the first stator <NUM> and the second stator <NUM> are disposed on the same side of the first optical assembly <NUM> and the second optical assembly <NUM>, so that mutually independent translational motion of the first optical assembly <NUM> and the second optical assembly <NUM> can be implemented, and functions of continuous zooming and image adjustment of the camera module <NUM> are implemented. The first stator <NUM> and the second stator <NUM> are located on the same side of the first optical assembly <NUM> and the second optical assembly <NUM>, facilitating arrangement of power supply wiring of the camera module <NUM>. The first stator <NUM> and the second stator <NUM> are fixedly connected to the base <NUM>, the first stator <NUM> and the second stator <NUM> are electrically connected to a circuit on a main board of a mobile terminal by using an FPC, and the arrangement architecture in which the first stator <NUM> and the second stator <NUM> are disposed on the same side of the first optical assembly <NUM> and the second optical assembly <NUM> further helps reduce a risk of fatigue or fracture of the FPC. In this implementation, the first piezo element of the first stator <NUM> and the second piezo element of the second stator <NUM> are used as source power for controlling the movement of the first optical assembly <NUM> and the second optical assembly <NUM>, providing advantages of a light weight and a small volume. In addition, the material of the piezo element does not cause electromagnetic interference to other elements in the mobile terminal.

Refer to <FIG>, and <FIG>. In this implementation, because the first stator <NUM> and the second stator <NUM> are located on the same side of the first optical assembly <NUM> and the second optical assembly <NUM>, to maximize the stroke of the first optical assembly <NUM> and the second optical assembly <NUM>, the first driven element <NUM> and the second driven element <NUM> are staggered in the extension direction of the optical axis, that is, the second driven element <NUM> and the first driven element <NUM> are parallel to each other and there is a specific overlapping region between the second driven element <NUM> and the first driven element <NUM>. This can ensure that the second driven element <NUM> and the first driven element <NUM> do not collide or interfere during the motion, because their trajectories are also parallel to each other. In the camera module <NUM>, the movement of the first driven element <NUM> and the second driven element <NUM> can achieve a long stroke of at least <NUM>. <FIG> and <FIG> are schematic diagrams of the camera module in two different position states. On a cross section perpendicular to the optical axis (a position of the cross section shown in <FIG>), the second driven element <NUM> is located between the first driven element <NUM> and the side plate of the base; and the second driven element <NUM> and the first driven element <NUM> are disposed in parallel, and their heights from the bottom plate may be different or the same.

In this implementation, the first position sensor <NUM> and the second position sensor <NUM> are disposed on the side of the first optical assembly <NUM> and the second optical assembly <NUM> that faces away from the first stator <NUM> and the second stator <NUM>. In another implementation, the first position sensor <NUM> and the second position sensor <NUM> as well as the first stator <NUM> and the second stator <NUM> may alternatively be disposed on the same side of the first optical assembly <NUM> and the second optical assembly <NUM>. The first position sensor <NUM> and a position element that cooperates with the first position sensor <NUM> to detect a position may be disposed in a region between the bottom plate of the base and the first stator and the first driven element. Similarly, the second position sensor <NUM> may alternatively be disposed in a region between the second driven element and the bottom plate.

In this application, the second position sensor <NUM> is disposed on the second optical assembly <NUM> to ensure the position detection precision of the second optical assembly <NUM>. Because the process of moving the second optical assembly <NUM> is intended to adjust the sharpness of the image, the high position detection precision of the second optical assembly <NUM> can ensure timeliness of image adjustment in the zooming process, thereby ensuring that the image is always clear in the zooming process.

In an implementation, the first adapter <NUM> may provide an elastic pre-stress to ensure contact between the first cantilever of the first stator <NUM> and the contact region <NUM> of the first driven element <NUM>. It may be understood that the first adapter <NUM> may include a spring plate, and the spring plate applies an elastic force to the first cantilever, so that in the process in which the first cantilever comes into contact with the contact region <NUM> of the first driven element <NUM>, under action of the elastic pre-stress of the elastic sheet, a direction of the elastic pre-stress faces toward the contact region <NUM> of the first driven element <NUM>. This ensures that vibration of the first cantilever of the first stator <NUM> can drive the first driven element <NUM> to move.

In another implementation, the elastic pre-stress against the first cantilever of the first stator <NUM> and the second cantilever of the second stator <NUM> may alternatively be formed through structural design of the first driven element <NUM> and the second driven element <NUM>. The first driven element <NUM> is used as an example for description. The structure of the second driven element <NUM> may be the same as that of the first driven element <NUM>.

Refer to <FIG>, <FIG>. The first driven element <NUM> includes a fixing region <NUM> located in a central region, and contact regions <NUM> symmetrically disposed on two opposite sides of the fixing region <NUM>. Grooves are formed on both of the two contact regions <NUM>, openings of the two grooves are opposite to each other, and extension directions of the two grooves are in parallel. The contact region <NUM> is used to provide guidance during the movement, and a groove of the contact region <NUM> is equivalent to a guiding track. A hollow region <NUM> is formed between the contact region <NUM> and the fixing region <NUM>, and two ends of the contact region <NUM> are separately connected to the fixing region <NUM> by using a connection region <NUM>. Specifically, the fixing region <NUM> is substantially rectangular, and four connection regions <NUM> are respectively located at four corner positions of the fixing region <NUM>. Each connection region <NUM> includes a first connection segment <NUM>, a second connection segment <NUM>, and a third connection segment <NUM> that are successively connected between the fixing region <NUM> and the contact region <NUM>.

The four first connection segments <NUM> are used to provide disturbance in the motion direction of the first driven element <NUM> in the motion process. Because the fixing region <NUM> is fixedly connected to the first optical assembly <NUM>, in the process in which the first stator drives the first driven element to move, the first optical assembly <NUM> may bring an external force to the first driven element that hinders movement of the first driven element. The first connection segment <NUM> is of a metal strip structure, and its material itself has an elastic deformation capability, which may also be understood as a buffer force. Therefore, the first connection segments <NUM> are distributed around the fixing region <NUM>, thereby providing disturbance of the contact region <NUM> in all directions. The disturbance may be understood as a deviation or vibration.

Based on the design of the contact region <NUM> and the third connection segment <NUM>, a pre-stress of the first driven element on the first cantilever on the first stator can be provided, so that the first cantilever receives a specific elastic resistance force and can drive the first driven element to move. Specifically, a vertical distance between the two contact regions <NUM> is set based on a specific size of a free end of the first cantilever of the first stator. It is necessary to ensure that when the free end of the first cantilever extends into the groove and abuts against the contact region <NUM>, the first cantilever provides an opening force for the contact region, and the contact region provides a pre-stress for the first cantilever, provided that a distance between the contact region and the center of the first stator is less than a distance between the free end of the first cantilever and the center of the first stator. The third connection segment <NUM> is a relatively narrow connection segment connected between the second connection segment <NUM> and the contact region <NUM>, and has a better elastic deformation capability than the second connection segment <NUM> and the contact region. The third connection segment <NUM> is arranged so that the first cantilever is in contact with the contact region <NUM>. The third connection segment <NUM> receives a pre-stress of the contact region <NUM>, but does not affect the vibration of the first cantilever. The first cantilever can just perform elliptic motion on the surface of the contact region <NUM>, so as to push the first driven element to move. Rigidity of the second connection segment <NUM> is greater than rigidity of the third connection segment, and the four second connection segments <NUM> are located at the four corners of the first driven element <NUM>. The rigidity of the second connection segment <NUM> can ensure that the structure of the second driven element is stable and is not easy to deform.

Refer to <FIG> and <FIG>. In this implementation, structures of a base <NUM> and a housing (not shown) of a camera module <NUM> are substantially the same as the structures in Embodiment <NUM>, and a difference lies in that two notches disposed at a position at which the housing and the base <NUM> are connected are not on a same side of the base <NUM>. Instead, the two notches are distributed on two sides of the base <NUM>, and in a direction perpendicular to the optical axis and the side plate <NUM> of the base <NUM>, positions of the two notches are staggered, that is, the two notches are not in a positive relationship.

In this implementation, guide shafts <NUM> (including a first shaft <NUM> and a second shaft <NUM>), a first optical assembly <NUM>, and a second optical assembly <NUM> of the camera module are disposed the same as those in Embodiment <NUM>. A main difference between this implementation and Embodiment <NUM> lies in that, in this implementation, a first driven element <NUM>, a first stator <NUM>, a first adapter <NUM>, and a first power supply element <NUM> of a first piezo assembly <NUM> are disposed on one side of the first optical assembly <NUM> and the second optical assembly <NUM>. A second driven element <NUM>, a second stator <NUM>, a second adapter (not shown, and the second adapter may not be disposed), and a second power supply element <NUM> of a second piezo assembly <NUM> are disposed on the other side of the first optical assembly <NUM> and the second optical assembly <NUM>, that is, the first stator <NUM> and the second stator <NUM> are arranged on two sides of the first optical assembly <NUM> and the second optical assembly <NUM>, respectively. In the direction perpendicular to the optical axis and the side plate <NUM> of the base <NUM>, positions of the first stator <NUM> and the second stator <NUM> are arranged in a staggered manner corresponding to positions of the two notches (not shown), respectively. An external connector of the first power supply element <NUM> of the first piezo assembly <NUM> extends out of the base <NUM> from one notch, and an external connector of the second power supply element <NUM> of the second piezo assembly <NUM> extends out of the base <NUM> from the other notch. For a specific structure of the notch, refer to Embodiment <NUM>. Alternatively, the notch may be of another structure. For example, a through hole is provided on a side plate, or a through hole is provided on a bottom plate, provided that the external connector can be led out of the base.

In this implementation, mutually independent translational motion of the first optical assembly <NUM> and the second optical assembly <NUM> can also be implemented, and functions of continuous zooming and image adjustment of the camera module <NUM> are implemented. The first stator <NUM> and the second stator <NUM> are arranged on two sides of the first optical assembly <NUM> and the second optical assembly <NUM>, respectively, so that the first piezo assembly <NUM> and the second piezo assembly <NUM> have relatively large assembly space, and structures of the first piezo assembly <NUM> and the second piezo assembly <NUM> are independent of each other without interference. In Embodiment <NUM>, to ensure that the first driven element <NUM> and the second driven element <NUM> do not interfere in a movement process, they need to be disposed in parallel and partially overlapped in terms of space, so as to obtain a relatively large moving stroke. However, in this implementation, the first driven element <NUM> and the second driven element <NUM> are not on the same side of the optical assembly, and their layouts are independent of each other, which is convenient from the perspective of structural design and assembly.

To reduce movement space occupied by the first driven element <NUM> and the second driven element <NUM> during movement, in a possible implementation, the first stator <NUM> and the second stator <NUM> are respectively fixed to middle regions of a pair of side plates <NUM> on the base <NUM>, where the middle region is a region on the side plate <NUM> whose distances from the front end face <NUM> and the rear end face <NUM> are equal. Specifically, a middle section of the base <NUM> is found before the first stator and the second stator are disposed. The middle section is a plane located between the front end face <NUM> and the rear end face <NUM> of the base <NUM> and is parallel to the front end face <NUM> and the rear end face <NUM>. The first stator <NUM> and the second stator <NUM> are fixed at the position of the side plate <NUM> corresponding to the middle section, and the first stator <NUM> and the second stator <NUM> are disposed oppositely.

Because the driven elements (that is, the first driven element and the second driven element) are relatively long, the stators (the first stator <NUM> and the second stator <NUM>) are placed at an intermediate position (the middle section of the module), thereby reducing motion space occupied by the driven elements when they move.

Settings of the position sensor and the position element in the camera module provided in this implementation may be the same as those in Embodiment <NUM>.

Refer to <FIG>. In this implementation, structures of a base <NUM> and a housing (not shown) of a camera module <NUM> are more similar to the structures in Embodiment <NUM>, and two notches disposed at a position at which the housing and the base <NUM> are connected are also distributed on two sides of the base <NUM>. A difference between this implementation and Embodiment <NUM> lies in that, a size of one notch extending along the optical axis is greater than a size of the other notch extending along the optical axis, and the notch with the larger size needs to meet a requirement that an external connector can move synchronously in the notch along with the optical assembly. An external connector accommodated in the notch with the smaller size does not move with the optical assembly.

In this implementation, guide shafts <NUM> (including a first shaft <NUM> and a second shaft <NUM>), a first optical assembly <NUM>, and a second optical assembly <NUM> are disposed the same as those in Embodiment <NUM>. In addition to differences in the arrangement of the notches on the base <NUM> and the housing, a further difference between this implementation and Embodiment <NUM> is as follows: In this implementation, a first driven element <NUM>, a first stator (not shown, blocked by a first power supply element <NUM>, not shown), a first adapter (not shown, blocked by the first power supply element <NUM>, not shown), and the first power supply element <NUM> of the first piezo assembly <NUM> are disposed on one side of the first optical assembly <NUM> and the second optical assembly <NUM>. The first stator is fixed to the base <NUM> by using the first adapter and the first power supply element <NUM>. The first driven element <NUM> is fixed to a second body <NUM> of a first holder on one side of the first optical assembly <NUM>. For specific structures of the first stator, the first adapter, and the first power supply element, refer to the structures of the first stator, the first adapter, and the first power supply element in Embodiment <NUM>. A second driven element <NUM>, a second stator <NUM>, a second adapter (not shown, and the second adapter may not be disposed), and a second power supply element <NUM> of the second piezo assembly <NUM> are disposed on the other side of the first optical assembly <NUM> and the second optical assembly <NUM>. In this implementation, the second stator <NUM> is fixed to the first optical assembly <NUM>, specifically fixedly connected to the first body <NUM> of the first holder. Therefore, the second adapter may not be disposed, and the second stator <NUM> is directly fixed to the first body <NUM>. The second driven element <NUM> is fixed to a first body <NUM> of a second holder on the other side of the second optical assembly <NUM>. An external connector of the second power supply element <NUM> extends out of the base <NUM> from the notch of a larger size. The first stator <NUM> and the second stator <NUM> are respectively located on two sides of the first optical assembly <NUM>, so that relatively large space can be provided for mounting the first stator and the second stator, positions of the first stator and the second stator are independent of each other, and avoidance does not need to be considered in a design and assembly process, thereby improving manufacturing efficiency and reducing design difficulty.

In a process in which the first power supply element <NUM> receives a current, so that the first stator <NUM> generates vibration and drives the first driven element <NUM> and the first optical assembly <NUM> to move, the second stator <NUM> moves synchronously with the first optical assembly <NUM>. During movement, the second stator <NUM> may receive a current and generate vibration, and synchronously drive the second driven element <NUM> and the second optical assembly <NUM> to move. In this way, linkage between the first optical assembly <NUM> and the second optical assembly <NUM> is implemented, so that the camera module <NUM> has a relatively good continuous zoom function, and position precision of the second optical assembly <NUM> relative to the first optical assembly <NUM> can be improved, thereby improving an imaging effect after zooming.

On the basis of this implementation, the first stator <NUM> and the second stator <NUM> may alternatively be disposed on the same side of the first optical assembly <NUM>, provided that the positions of the first driven element <NUM> and the second stator <NUM> on the first holder on the side of the first optical assembly <NUM> do not interfere. In this solution, only one notch needs to be provided on the base <NUM> and the housing, the external connector of the first power supply element <NUM> is fixed in the notch, the external connector of the second power supply element <NUM> is movable in the notch, and the positions of the two external connectors do not interfere.

Refer to <FIG>. In this implementation, the camera module <NUM> includes a base (not shown; for a structure of the base, refer to the base structure in Embodiment <NUM>), a first optical assembly <NUM>, a second optical assembly <NUM>, two guide shafts <NUM>, two driven tracks <NUM>, a first piezo assembly <NUM>, and a second piezo assembly <NUM>. The two guide shafts <NUM> are parallel to each other and both are parallel to the optical axis, and the two driven tracks <NUM> are parallel to each other and both are parallel to the optical axis. Both the guide shaft <NUM> and the driven track <NUM> are fixedly connected to the base. One side of the first optical assembly <NUM> and the second optical assembly <NUM> is slidably connected to the two guide shafts <NUM>, and the other side of the first optical assembly <NUM> and the second optical assembly <NUM> is slidably connected to the two driven tracks <NUM>. In this implementation, because the first stator <NUM> and the second stator <NUM> are fixedly connected to the first optical assembly <NUM> and the second optical assembly <NUM>, respectively, for structures of the first stator and the first power supply element of the first piezo assembly <NUM>, refer to the structures of the second stator and the second power supply element in Embodiment <NUM>; and for structures of the second stator and the second power supply element in the second piezo assembly <NUM>, still refer to the structures of the second stator and the second power supply element in Embodiment <NUM>. Unlike the previous embodiments, in this embodiment, the first piezo assembly <NUM> and the second piezo assembly <NUM> do not include a driven element, but cooperate with the first stator <NUM> and the second stator <NUM> by using the driven track <NUM> as a driven element. In this way, stability of movement of the first optical assembly <NUM> and the second optical assembly <NUM> can be improved. In addition, the driven track <NUM> has functions of both a movable track and a driven element, thereby effectively saving accommodating space of the camera module, and facilitating development of the camera module with a small volume and a light weight. In this implementation, the first piezo assembly <NUM> is fixedly connected to the first optical assembly <NUM> to move together with the first optical assembly <NUM>, and the second piezo assembly <NUM> is fixedly connected to the second optical assembly <NUM> to move together with the second optical assembly <NUM>. The first piezo assembly <NUM> and the second piezo assembly may be disposed on the same side of the first optical assembly <NUM> and the second optical assembly <NUM>, and the positions of the two driven tracks are disposed corresponding to the positions of the first piezo assembly <NUM> and the second piezo assembly <NUM>. The first piezo assembly <NUM> and the second piezo assembly <NUM> may alternatively be disposed on two sides of the first optical assembly <NUM> and the second optical assembly <NUM>, respectively. A working principle of the camera module <NUM> provided in this embodiment is the same as that in the previous embodiments. The first power supply element receives power from the main board of the mobile terminal, so that the first piezo element in the first stator vibrates, the vibration is amplified by the first cantilever of the first fixing element, and the free end of the first cantilever cooperates with one of the driven tracks <NUM>. Specifically, the driven track <NUM> is partially embedded into the first optical assembly <NUM> and the second optical assembly <NUM>, an outer surface that is of the driven track <NUM> and that is not surrounded by the first optical assembly <NUM> is provided with a groove, the first cantilever extends into the groove and comes into contact with the driven track <NUM>, and the first cantilever amplifies the vibration. In this way, the free end of the first cantilever is in contact with the driven track <NUM> and performs elliptic motion, thereby driving the first optical assembly <NUM> to move relative to the driven track <NUM>. Similarly, the second power supply element receives power from the main board of the mobile terminal, so that the second piezo element of the second stator <NUM> vibrates, the vibration is amplified by the second cantilever of the second fixing element, and the free end of the second cantilever cooperates with the other driven track <NUM>. Specifically, the driven track <NUM> is partially embedded into the first optical assembly <NUM> and the second optical assembly <NUM>, an outer surface that is of the driven track <NUM> and that is not surrounded by the second optical assembly <NUM> is provided with a groove (or referred to as a track groove), the second cantilever extends into the groove and comes into contact with the driven track (that is, an inner wall of the groove), and the second cantilever amplifies the vibration. In this way, the free end of the second cantilever is in contact with the driven track and performs elliptic motion, thereby driving the second optical assembly <NUM> to move relative to the driven track <NUM>. For the fixing manner of the first stator <NUM> and the first optical assembly <NUM>, refer to the fixing manner of the first stator and the first adapter in Embodiment <NUM>, provided that the first stator <NUM> and the first optical assembly <NUM> are relatively fixedly connected, and the piezo element of the first stator <NUM> is not constrained by another element and can vibrate freely; in other words, a gap needs to be maintained between the first piezo element and the first optical assembly <NUM>. The fixing manner of the second stator <NUM> and the second optical assembly <NUM> is the same as the fixing manner of the first stator <NUM> and the first optical assembly <NUM>.

Based on the basic architectures in the foregoing embodiments, a quantity of first stators and a quantity of second stators in the camera module <NUM> provided in this application each may be one, two, or more. The following describes an architecture of the first stator in a plurality of different possible implementations by using the first stator as an example.

In a first implementation, there is one first stator, and the first stator includes a first fixing element and two first piezo elements fixed on two sides of the first fixing element by adhesive. A structural form of the first stator in this implementation is the same as that of the first stator in Embodiment <NUM>. Refer to <FIG>. Two first piezo elements are added on the basis of the first fixing element <NUM> shown in <FIG> to form the first stator in this implementation. The first cantilever <NUM> is configured to cooperate with the first driven element or the driven track, and a quantity of fixing parts <NUM> is not limited to two, and may be one or more, provided that the first piezo element and the body <NUM> of the first fixing element <NUM> can be supported on the first adapter, and a gap is formed between the first piezo element and the first adapter. There may be one or more first cantilevers <NUM>.

In a second implementation, refer to <FIG>. There are two or more first stators <NUM>, and a basic architecture of each first stator <NUM> is the same as that of the first stator in the first implementation. Two or more first stators <NUM> are arranged in a row in the extension direction of the optical axis (specifically, bodies of first fixing elements of all the first stators are coplanar), and fixing parts of first fixing elements of two adjacent first stators <NUM> overlap. Two first stators <NUM> are used as an example. Bodies <NUM> of first fixing elements <NUM> of the two first stators <NUM> are disposed side by side. One fixing part <NUM> of one first stator <NUM> overlaps one fixing part <NUM> of the other first stator <NUM>. Central positions of the two fixing parts <NUM> overlapping each other are midpoints of central connection lines of the two first stators <NUM>. It may be understood that the two overlapping fixing parts <NUM> are located between the bodies <NUM> of the two first fixing elements, and the central positions of the two overlapping fixing parts <NUM> have equal vertical distances from the bodies of the two first fixing elements. The first cantilevers of the two first stators are distributed on two sides of the two overlapping fixing parts <NUM>, and a quantity of contact regions of the first driven element <NUM> that cooperates with the first cantilevers <NUM> is two, and the two contact regions are distributed on two sides of the first stator <NUM> to respectively cooperate with the first cantilevers <NUM>.

In a third implementation, refer to <FIG>. There are two or more first stators <NUM>, and a basic architecture of each first stator <NUM> is the same as that of the first stator in the first implementation. The two or more first stators <NUM> are disposed in an overlapping manner (specifically, on the cross section of the camera module perpendicular to the optical axis, the bodies of all the first fixing elements and the first piezo elements are disposed in an overlapping manner). One fixing part <NUM> of one first stator <NUM> and one fixing part <NUM> of the other first stator <NUM> overlap, and are located on one side of the two bodies disposed in an overlapping manner, and the other two fixing parts <NUM> of these two first stators <NUM> are disposed side by side on the other side of the bodies. The central positions of the two fixing parts overlapping each other fall on one center line L0 of the body, and the first cantilevers <NUM> of the two first stators are respectively disposed on two sides of the center line L0. As shown in <FIG>, the two first cantilevers <NUM> are respectively located on an upper part and a lower part of the body, and the fixing parts <NUM> are distributed on the left and right sides of the body. A quantity of contact regions of the first driven element <NUM> that cooperates with the two first cantilevers is the same as a quantity of the first cantilevers <NUM>, and the contact regions are distributed on two sides of the first stator to respectively cooperate with the first cantilevers <NUM>.

In a fourth implementation, refer to <FIG>. There are two first stators <NUM>, a basic architecture of each first stator <NUM> is the same as that of the first stator in the first implementation, and bodies of the two first stators <NUM> are disposed side by side. One fixing part <NUM> of one first stator <NUM> and one fixing part <NUM> of the other first stator <NUM> overlap, central positions of the two fixing parts <NUM> overlapping each other are midpoints of central connection lines of the two first stators <NUM>, and the first cantilevers <NUM> of the two first stators <NUM> are distributed on a same side of the centers of the two first stators <NUM>. As shown in <FIG>, the first cantilevers <NUM> of the two first stators <NUM> are both located on a lower part of the body, and the two first cantilevers <NUM> jointly cooperate with one contact region of the first driven element <NUM>. Therefore, a quantity of contact regions of the first driven element <NUM> is one, and the contact region is distributed on one side of the first stator <NUM>.

In a fifth implementation, refer to <FIG>. There are two first stators <NUM>, a basic architecture of each first stator <NUM> is the same as that of the first stator in the first implementation, and bodies of the two first stators <NUM> are disposed side by side. In addition, contact regions of the first driven element <NUM> are located between the two first stators <NUM>, the two first stators <NUM> are symmetrically distributed on two sides of the contact regions of the first driven element <NUM>, and the first cantilevers <NUM> of the two first stators <NUM> are arranged in a mirror with the contact region of the first driven element <NUM> as the center.

This application is not limited to the structures and layouts of the first stators described in the foregoing five implementations. There may be a plurality of first stators, for example, bodies of the plurality of first stators are disposed side by side or disposed in an overlapping manner. There may be one or more first cantilevers in each first stator.

Claim 1:
A camera module, comprising a base (<NUM>), a guide shaft (<NUM>), a first piezo assembly (<NUM>), a second piezo assembly (<NUM>), and a first optical assembly (<NUM>) and a second optical assembly (<NUM>) that are successively slidably connected to the guide shaft (<NUM>) in an optical axis direction, wherein the guide shaft (<NUM>) is fixedly connected to the base (<NUM>); the first piezo assembly (<NUM>) is connected between the base (<NUM>) and the first optical assembly (<NUM>), the first piezo assembly (<NUM>) comprises a first stator (<NUM>) and a first driven element (<NUM>), the first stator (<NUM>) comprises a first piezo element (<NUM>) and a first fixing element (<NUM>) that are fixedly connected, the first fixing element (<NUM>) comprises a first cantilever, and the first cantilever is configured to amplify vibration generated by the first piezo element (<NUM>) in an energized state, and cooperate with the first driven element (<NUM>) to drive the first optical assembly (<NUM>) to slide on the guide shaft (<NUM>); the second piezo assembly (<NUM>) is connected between the base (<NUM>) and the second optical assembly (<NUM>), or between the first optical assembly (<NUM>) and the second optical assembly (<NUM>), the second piezo assembly (<NUM>) comprises a second stator (<NUM>) and a second driven element (<NUM>), the second stator (<NUM>) comprises a second piezo element and a second fixing element that are fixedly connected, the second fixing element comprises a second cantilever, and the second cantilever is configured to amplify vibration generated by the second piezo element in an energized state, and cooperate with the second driven element (<NUM>) to drive the second optical assembly (<NUM>) to slide on the guide shaft (<NUM>), wherein the first driven element (<NUM>) is fixed to the first optical assembly (<NUM>), the first stator (<NUM>) is fixed to the base (<NUM>), the second driven element (<NUM>) is fixed to the second optical assembly (<NUM>), and characterized in that
the second stator (<NUM>) is fixed to the first optical assembly (<NUM>).