Lens actuating apparatus, periscope photographing module, and photographing device

The present disclosure relates to a lens actuating apparatus, a periscope lens module including the lens actuating apparatus, and a photographing device including the periscope lens module. Light enters a lens group after being reflected, where a direction of an optical axis of the lens group is different from a thickness direction of the photographing device to eliminate a limitation of a length of the direction of the optical axis of the lens group on a thickness of the photographing device, and implement thinness of the photographing device. A translation motor and an axis-moving motor are disposed on a holder of the lens actuating apparatus to implement focusing and anti-shake of the periscope lens module including an optical component and the lens actuating apparatus. The translation motor and the axis-moving motor are independent of each other.

TECHNICAL FIELD

This application relates to the field of electronic technologies, and in particular, to a lens actuating apparatus, a periscope photographing module including the lens actuating apparatus, and a photographing device.

BACKGROUND

A photographing device usually includes a lens group. Different lenses in the lens group refract different light, so that the light is reflected to an image sensor to perform imaging. To implement focusing and anti-shake to obtain a clear image, motors need to be disposed around the lens group, to drive the lens group to translate along a direction of an optical axis to perform focusing. Alternatively, two of motors around the lens group are symmetrically disposed, and different acting forces exerted by the symmetrically disposed two motors on the lens group are controlled, so that the lens group rotates within a plane perpendicular to a direction of an optical axis, to compensate for shake during photographing, thereby implementing anti-shake. In the prior art, motors that drive a lens group to translate and rotate are the same, and consequently, the lens group may translate and rotate separately only.

SUMMARY

This application provides a lens actuating apparatus, a periscope photographing module including the lens actuating apparatus, and a photographing device, to simultaneously implement translation and rotation of a lens group, and improve focusing and anti-shake efficiency to quickly obtain a clear image.

According to a first aspect, this application provides a lens actuating apparatus, configured to drive an optical component fastened to the actuating apparatus to move or rotate. The lens actuating apparatus includes a housing, a holder, a plurality of elastic members, a translation motor and an axis-moving motor. The holder is accommodated in the housing, the optical component is fastened to the holder, and the optical component is configured to change a propagation direction of light. All of the plurality of elastic members are connected between the housing and the holder and are disposed at intervals around a light incident axis of the optical component, to support the holder in the housing. Both the translation motor and the axis-moving motor are located between the housing and the holder, and the translation motor and the axis-moving motor each include a fastening part and a movable part that moves relative to the fastening part. One of the fastening part and the movable part of the translation motor is fastened to the holder and the other of the fastening part and the movable part of the translation motor is fastened to the housing, and the translation motor is configured to drive the holder to move in a translation direction relative to the housing. One of the driving part and the movable part of the axis-moving motor is fastened to the holder and the other of the driving part and the movable part of the axis-moving motor is fastened to the housing. The axis-moving motor is configured to cooperate with the plurality of elastic members to drive the holder to rotate around a rotation axis relative to the housing, and the rotation axis is parallel to the translation direction or perpendicular to the translation direction.

In this application, the translation motor and the axis-moving motor are disposed on the holder of the lens actuating apparatus, so that the translation motor is used to drive the optical component fastened to the holder to translate, so as to implement focusing and anti-shake of a photographing module including the optical component and the lens actuating apparatus; and the axis-moving motor is used to drive the optical component fastened to the holder to rotate, to drive the optical component located on the holder to perform axis moving, so as to compensate for shake generated when the photographing module including the optical component and the lens actuating apparatus performs photographing, and implement anti-shake of the photographing module. In this application, the translation motor and the axis-moving motor are independent of each other, so that the translation motor and the axis-moving motor can work simultaneously, can further drive the holder to translate and rotate simultaneously, and can simultaneously implement focusing and anti-shake of the optical component installed on the holder. In this way, control efficiency is higher to quickly obtain a clear image. In addition, in this application, the holder can rotate through cooperation between the axis-moving motor and the elastic members, with no need to dispose motors pairwise symmetrically around the holder, and with no need to control different driving forces of relative motors to the holder to implement rotation. In this way, a quantity of motors disposed around the holder can be reduced, and a volume occupied by the lens actuating apparatus can be decreased. In addition, because the quantity of motors is reduced, control on the motors can also be simplified and the control efficiency can be improved.

In some embodiments of this application, each of the elastic members is a two degree-of-freedom elastomer, an elastic coefficient in a first direction is less than an elastic coefficient in a second direction or an elastic coefficient in a third direction, the first direction, the second direction, and the third direction are respectively orthogonal, and the translation direction of the holder is parallel to the first direction.

In this application, because the elastic member is a two degree-of-freedom elastomer, to be specific, elastic coefficients of the elastic member in two of three orthogonal directions are less than an elastic coefficient of the elastic member in the other direction, the elastic member is more easily deformed in the two of the three orthogonal directions than in the other direction. Based on a requirement, elastic members with different degree-of-freedom directions are selected and used at different positions of the holder, so that when the axis-moving motor exerts a force on the holder, the holder rotates because elastic coefficients of the elastic members disposed at the different positions of the holder are different along a direction of the force exerted by the axis-moving motor on the holder. In this case, the holder rotates with no need to control different driving forces of the motors at the different positions of the holder on the holder. In this way, control on the axis-moving motor is simplified, efficiency is improved, and the holder can be prevented from rotating in a non-rotation direction or a non-translation direction.

In some embodiments of this application, the lens actuating apparatus further includes a plurality of position sensors, and the position sensors one-to-one correspond to the axis-moving motor and the translation motor. A position closed loop can be formed by disposing the position sensors that one-to-one correspond to the axis-moving motor and the translation motor. To be specific, an accurate position of the holder relative to the housing can be accurately learned of by using the position sensor, and control on the axis-moving motor and the translation motor is further instructed based on information obtained by the position sensor. In this way, accurate focusing and anti-shake of a lens are implemented. Specifically, in an embodiment of this application, the position sensor is a Hall (Hall) sensor.

In some embodiments of this application, the optical component includes a light incident surface and a light emergent surface that has an included angle with the light incident surface. The light incident surface has a light incident axis perpendicular to the light incident surface, and the light emergent surface has a light emergent axis perpendicular to the light emergent surface. The elastic member is sheet-shaped, and the light incident axis is parallel to a plane on which the elastic members are located.

The included angle exists between the light incident surface and the light emergent surface of the optical component. To be specific, the optical component can change the propagation direction of the light passing through the optical component. In addition, the plane on which the elastic members are located is parallel to the light incident axis, to be specific, the elastic member cannot be disposed along a direction of the light incident axis, to prevent the elastic member from increasing a thickness of the lens actuating apparatus along the direction of the light incident axis.

In some embodiments of this application, the light incident axis is perpendicular to the light emergent axis, the translation direction is parallel to the light emergent axis, and the rotation axis is perpendicular to both the light incident axis and the light emergent axis. When the lens actuating apparatus is applied to the photographing module, the lens actuating apparatus drives the optical component to move along the direction of the light emergent axis, so that a distance between the optical component and a photosensitive chip can be adjusted, to be specific, an imaging distance can be adjusted. In this way, focusing of the photographing module can be implemented. The rotation axis is perpendicular to both the light incident axis and the light emergent axis, so that the holder can drive the optical component to implement anti-shake along the direction of the light incident axis.

Specifically, in an embodiment, both the translation motor and the axis-moving motor are voice coil motors, and both the movable part of the translation motor and the movable part of the axis-moving motor are magnets and are fastened to the holder. Direction of an N pole and an S pole of the movable part of the translation motor are the same as a direction of the light emergent axis, and a direction from an N pole to an S pole of the movable part of the axis-moving motor is the same as a direction of the light incident axis.

The voice coil motor usually includes a magnet and a coil corresponding to the magnet. Different currents are input into the coil, to control a magnitude of a Lorentz force between the coil and the magnet, so as to control an acting force of driving the holder relative to the housing based on an actual requirement. In this embodiment, the direction from the N pole to the S pole of the movable part of the translation motor is the same as the direction of the light emergent axis, so that a direction of a Lorentz force between a magnet and a coil of the translation motor is the direction of the light emergent axis. The direction from the N pole to the S pole of the movable part of the axis-moving motor is the same as the direction of the light incident axis, so that a direction of a Lorentz force between a magnet and a coil of the axis-moving motor is the direction of the light incident axis.

In some other embodiments of this application, the light incident axis is perpendicular to the light emergent axis, and both the translation direction and the direction of the rotation axis are parallel to the light emergent axis. When the lens actuating apparatus is applied to the photographing module, the lens actuating apparatus drives the optical component to move along the direction of the light emergent axis, so that a distance between the optical component and a photosensitive chip can be adjusted, to be specific, an imaging distance can be adjusted. In this way, focusing of the photographing module can be implemented. The rotation axis is perpendicular to both the light incident axis and the light emergent axis, so that the holder can drive the optical component to implement anti-shake along a direction perpendicular to the light emergent axis and the light incident axis.

Specifically, in an embodiment, both the translation motor and the axis-moving motor are voice coil motors, and both the movable part of the translation motor and the movable part of the axis-moving motor are magnets and are fastened to the holder. A direction from an N pole to an S pole of the fastening part of the translation motor is perpendicular to the light emergent axis and the light emergent axis, and a direction from an N pole to an S pole of the fastening part of the axis-moving motor is the same as a direction of the light incident axis.

In this embodiment, the direction from the N pole to the S pole of the movable part of the translation motor is perpendicular to the light emergent axis and the light emergent axis, so that a direction of a Lorentz force between a magnet and a coil of the translation motor is perpendicular to the direction of the light emergent axis and the direction of the light incident axis. The direction from the N pole to the S pole of the movable part of the axis-moving motor is the same as the direction of the light incident axis, so that a direction of a Lorentz force between a magnet and a coil of the axis-moving motor is the direction of the light incident axis.

In some embodiments of this application, the holder includes a first surface and a second surface that are disposed oppositely, and a third surface connected between the first surface and the second surface, and the third surface is far away from the light emergent surface of the optical component. The axis-moving motors are symmetrically disposed on the first surface and the second surface, and the translation motor is located at the center of the third surface or the translation motors are symmetrically disposed on the first surface and the second surface. The translation motor and the axis-moving motor that are located on a same surface are arranged side by side along the direction of the light emergent axis.

In some other embodiments of this application, the holder includes a first surface and a second surface that are disposed oppositely, and a third surface connected between the first surface and the second surface, and the third surface is far away from the light emergent surface of the optical component, where the axis-moving motor is disposed at the center of the third surface, and the translation motors are symmetrically disposed on the first surface and the second surface.

The axis-moving motors are symmetrically disposed on the first surface and the second surface, and the translation motor is located at the center of the third surface or the translation motors are symmetrically disposed on the first surface and the second surface, or the axis-moving motor is disposed at the center of the third surface and the translation motors are symmetrically disposed on the first surface and the second surface, so that the holder can be driven to rotate around the rotation axis perpendicular to the first surface, and translate in a movement direction that is the direction of the light emergent axis. Both the axis-moving motors and the translation motors are symmetrically disposed on the first surface and the second surface, or the axis-moving motor and the translation motor are disposed at the center of the third surface, so that forces of the first surface and the second surface are the same, and deflection and torques caused by different forces on the first surface and the second surface can be prevented from being generated in a process of translation or rotation of the holder.

In some embodiments, the plurality of elastic members are symmetrically disposed on the first surface and the second surface.

The elastic members disposed on the first surface and the second surface each include a translation elastic member and a common elastic member. Both an elastic coefficient of the translation elastic member along the direction of the light emergent axis and an elastic coefficient of the translation elastic member along the direction of the rotation axis are less than an elastic coefficient of the translation elastic member along a direction of the light incident axis. An elastic coefficient of the common elastic member along the direction of the rotation axis is greater than an elastic coefficient of the common elastic member along the direction of the light incident axis and an elastic coefficient of the common elastic member along the direction of the light emergent axis. An elastic coefficient of the common elastic member along a direction parallel to the rotation axis is greater than an elastic coefficient of the translation motor along the direction parallel to the rotation axis.

The translation elastic member and the common elastic member are respectively disposed on two sides of the first surface and the second surface along the direction of the light emergent axis, the translation elastic member is far away from the third surface relative to the common elastic member, and the common elastic member is close to the third surface relative to the translation elastic member.

The translation elastic member is far away from the third surface relative to the common elastic member, and the common elastic member is close to the third surface relative to the translation elastic member, and the elastic coefficient of the common elastic member along the direction parallel to the rotation axis is greater than the elastic coefficient of the translation motor along the direction parallel to the rotation axis. Therefore, when the axis-moving motor exerts a force on the holder along the direction of the light incident axis, deformation of the translation elastic member along the direction of the light incident axis is less than deformation of the common elastic member along the direction of the light incident axis. In this way, rotation along the direction of the rotation axis perpendicular to the first surface is generated.

Specifically, in an embodiment, the translation elastic member and the common elastic member each include a plurality of etched arms that are disposed at intervals and head-to-tail connected, an extension direction of an etched arm of the translation elastic member is parallel to the light incident axis, and an extension direction of an etched arm of the common elastic member is perpendicular to the first surface, so that both the elastic coefficient of the translation elastic member along the direction of the light emergent axis and the elastic coefficient of the translation elastic member along the direction of the rotation axis are less than an elastic coefficient of the translation elastic member along the direction of the light incident axis, and the elastic coefficient of the common elastic member along the direction of the rotation axis is greater than the elastic coefficient of the common elastic member along the direction of the light incident axis and the elastic coefficient of the common elastic member along the direction of the light emergent axis.

For the embodiment which the axis-moving motor is disposed at the center of the third surface, and the translation motors are symmetrically disposed on the first surface and the second surface, the plurality of elastic members may be respectively located on two sides of the first surface and the second surface along the direction of the light emergent axis; and both an elastic coefficient of the elastic member along the direction of the light emergent axis and an elastic coefficient of the elastic member along the direction of the light incident axis are less than an elastic coefficient of the elastic member along a direction perpendicular to the light emergent axis and the light incident axis.

Because the axis-moving motor is disposed on the third surface, a force exerted by the axis-moving motor on a side of the third surface of the holder is greater than a force exerted on a side of the light emergent surface. When both the elastic coefficient of the elastic member along the direction of the light emergent axis and the elastic coefficient of the elastic member along the direction of the light incident axis are less than the elastic coefficient of the elastic member along the direction perpendicular to the light emergent axis and the light incident axis, rotation along the direction of the rotation axis perpendicular to the first surface is generated. In addition, both the elastic coefficient of the elastic member along the direction of the light emergent axis and the elastic coefficient of the elastic member along the direction of the light incident axis are less than the elastic coefficient of the elastic member along the direction perpendicular to the light emergent axis and the light incident axis. Therefore, the holder can translate along the direction of the light emergent axis, but movement of the holder along the direction perpendicular to the first surface is limited. The holder is prevented from moving along a direction in which the movement does not need to be performed, to implement accurate control on the movement of the holder.

Specifically, in an embodiment, the elastic members each include a plurality of etched arms that are disposed at intervals and head-to-tail connected, and an extension direction of an etched arm is perpendicular to the light incident axis and the light emergent axis, so that both the elastic coefficient of the elastic member along the direction of the light emergent axis and the elastic coefficient of the elastic member along the direction of the light incident axis are less than the elastic coefficient of the elastic member along the direction perpendicular to the light emergent axis and the light incident axis.

In some embodiments of this application, the magnet includes 2×n sub-magnets, where n is a natural number greater than 0. N poles or S poles of adjacent sub-magnets are opposite, each magnet is fastened with a position sensor, and the position sensor is located at a junction of two sub-magnets at the center of the magnet.

A magnetic field linear region is near the junction of the two sub-magnets at the center of the magnet, so that there is linear relationship between a position change and a magnetic field change. There is a poor linear relationship between another position and the magnetic field change, and a position detection effect is poor. Therefore, motion information such as a motion distance and a motion speed of the holder relative to the housing can be more accurately learned of when the position sensor is located at the junction of the two sub-magnets at the center of the magnet. Then, the motion information obtained by the position sensor is used to instruct the translation motor and the axis-moving motor to drive the holder to move, so as to obtain accurate focusing and anti-shake effects.

In some other embodiments of this application, the magnet is a single magnet, and a direction towards which an N pole of the magnet faces is opposite to a direction towards which an S pole of the magnet faces. The position sensor is fastened to the housing and faces a side face of the magnet, and the side face of the magnet is perpendicular to the direction towards which the N pole faces and the direction towards which the S pole of the magnet faces. When the magnet is a single magnet, the side face of the magnet is a magnetic field linear region, and a position change and a magnetic field change are in a linear relationship. Therefore, the position sensor is disposed towards the side face of the magnet.

In some other embodiments of this application, the optical component is a reflection plane and has a single optical axis, the elastic member is sheet-shaped, and the optical axis is perpendicular to a plane on which the elastic members are located.

The translation direction is parallel to a direction of the optical axis, and the direction of the rotation axis is perpendicular to the translation direction. In this way, when the lens actuating apparatus is applied to the photographing module, the holder can translate along the translation direction to implement focusing, and the holder can rotate by using the rotation axis as an axis to implement axis moving of the photographing module. In this way, shake is compensated and anti-shake is implemented.

In some embodiments, both the translation motor and the axis-moving motor are voice coil motors, and both the movable part of the translation motor and the movable part of the axis-moving motor are magnets and are fastened to the holder. A direction front an N pole to an S pole of the movable part of the translation motor is the same as the direction of the optical axis, and a direction from an N pole to an S pole of the movable part of the axis-moving motor is perpendicular to the direction of the optical axis. In this case, acting forces of the translation motor and the axis-moving motor on the holder can make the translation direction parallel to the direction of the optical axis, and make the direction of the rotation axis perpendicular to the translation direction.

In some embodiments, the holder includes side faces parallel to the optical axis, the translation motor and the axis-moving motor are arranged side by side along the direction of the optical axis, and both the translation motor and the axis-moving motor are built in the sides. Both the translation motor and the axis-moving motor are built in the side faces, so that the translation motor and the axis-moving motor can be as close to the center of the holder as possible, the translation motor can drive the holder to move along the direction of the optical axis without deflection, and the axis-moving motor can drive the holder to rotate along the direction that is of the rotation axis and that is perpendicular to the translation direction without generating deflection in another direction. In this way, movement of the holder is more accurate.

The side faces include a first side face and a second side face that are opposite, and a third side face connected between the first side face and the second side face, and both the translation motor and the axis-moving motor are built in the third side face.

The plurality of elastic members are symmetrically disposed on the first side face and the second side face.

The elastic members disposed on the first side face and the second side face each include a translation elastic member and a common elastic member. Both an elastic coefficient of the translation elastic member along the direction of the optical axis and an elastic coefficient of the translation elastic member along a direction parallel to the first side face are less than an elastic coefficient of the translation elastic member along a direction perpendicular to the first side face. Both an elastic coefficient of the common elastic member along the direction of the optical axis and an elastic coefficient of the common elastic member along the direction perpendicular to the first side face are less than an elastic coefficient of the common elastic member along the direction parallel to the first side face. An elastic coefficient of the common elastic member along the direction parallel to the first side face is greater than an elastic coefficient of the translation elastic member along the direction parallel to the first side face.

The translation elastic member and the common elastic member are respectively disposed on two sides of the first side face and the second side face along the direction of the optical axis, the translation elastic member is close to the reflection plane relative to the common elastic member, and the common elastic member is far away from the reflection plane relative to the translation elastic member.

The translation elastic member is close to the reflection plane relative to the common elastic member, the common elastic member is far away from the reflection plane relative to the translation elastic member, the translation motor has a relatively large elastic coefficient along the direction of the light incident axis, and the common elastic member has a relatively small elastic coefficient along the direction of the light incident axis. Therefore, when the axis-moving motor exerts a force on the holder along the direction parallel to the first side face, deformation of the translation elastic member along the direction parallel to the first side face is less than deformation of the common elastic member along the direction parallel to the first side face. In this way, rotation along the direction of the rotation axis perpendicular to the first side face is generated.

In an embodiment, the translation elastic member and the common elastic member each include a plurality of etched arms that are disposed at intervals and head-to-tail connected, an extension direction of an etched arm of the translation elastic member is perpendicular to the first side face, and an etched arm of the common elastic member is parallel to the first side face. In this way, both the elastic coefficient of the translation elastic member along the direction of the optical axis and the elastic coefficient of the translation elastic member along the direction parallel to the first side face are less than the elastic coefficient of the translation elastic member along the direction perpendicular to the first side face, and both the elastic coefficient of the common elastic member along the direction of the optical axis and the elastic coefficient of the common elastic member along the direction perpendicular to the first side face are less than the elastic coefficient of the common elastic member along the direction parallel to the first side face.

According to a second aspect, this application provides a periscope photographing module. The periscope photographing module includes a first reflector, a lens group, a photosensitive chip, and the lens actuating apparatus. Both the first reflector and the lens group are installed on a holder of the lens actuating apparatus. After being reflected by the first reflector, light passes through the lens group and is transmitted to the photosensitive chip. A translation motor and an axis-moving motor drive the first reflector and the lens group to move, to implement focusing or anti-shake. Specifically, the translation motor drives the first reflector and the lens group to move, to change a distance between the lens group and the photosensitive chip, so as to implement focusing. The axis-moving motor drives the first reflector and the lens group to rotate, to change a direction of an optical axis and compensate for shake of the photographing module, thereby implementing anti-shake.

In some embodiments of this application, one lens actuating apparatus is further disposed between the lens group and the photosensitive chip of the periscope photographing module, a second reflector is installed on the lens actuating apparatus between the lens group and the photosensitive chip, and the second reflector is configured to reflect the light passing through the lens group to the photosensitive chip. In addition, focusing and anti-shake are jointly implemented through translation and rotation of the lens actuating apparatus on which the second reflector is installed and the lens actuating apparatus on which the first reflector is installed.

In some embodiments of this application, one second reflector is further disposed between the lens group and the photosensitive chip of the periscope photographing module, and the second reflector is configured to reflect the light passing through the lens group to the photosensitive chip.

According to a third aspect, this application further provides another periscope photographing module. The periscope photographing module includes a first reflector, a lens group, a photosensitive chip, a second reflector, and the lens actuating apparatus. The second reflector is installed on a holder of the lens actuating apparatus, the first reflector is configured to reflect light to the lens group, the lens group is configured to transmit the light reflected by the first reflector to the second reflector, the second reflector is configured to transmit the light transmitted by the lens group to the photosensitive chip, and a translation motor and an axis-moving motor of the lens actuating apparatus drive the reflector and the lens group to move, to implement focusing or anti-shake.

According to a fourth aspect, this application provides a photographing device. The photographing device includes a housing, a control unit, and the periscope photographing module, and the periscope photographing module is installed in the housing. A light incident hole is disposed on the housing, light enters the periscope photographing module by using the light incident hole, and an optical axis of a lens group of the periscope photographing module crosses an axis of the light incident hole. The first reflector is located between the light incident hole and the lens group and is configured to reflect the light entering from the light incident hole to the lens group. A translation motor, an axis-moving motor, and a photosensitive chip all are electrically connected to the control unit. The control unit is configured to receive and analyze an image of the photosensitive chip to determine a proper corrected motion value and send a signal to a corresponding translation motor and/or a corresponding axis-moving motor, so that the translation motor and/or the axis-moving motor drive/drives a holder and an optical component installed on the holder to translate and/or rotate.

In this application, the optical axis of the lens group of the periscope photographing module crosses the axis of the light incident hole, and the light entering from the light incident hole is reflected to the lens group by using the first reflector. The light incident hole is generally disposed in a thickness direction of the photographing device. The optical axis of the lens group does not need to be disposed coaxially with an axial direction of the light incident hole, and therefore a size of the thickness direction of the photographing module can be prevented from being limited by a size of a direction of the optical axis of the lens group, thereby facilitating thinness of the photographing module. In addition, focusing and anti-shake of the periscope photographing module in the photographing module can make the photographing device obtain an image with better definition through photographing.

DESCRIPTION OF EMBODIMENTS

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

In the descriptions of this application, it should be noted that, unless otherwise specified and limited, terms “installation”, “connection”, and “fastening” should be understood in a broad sense. For example, the “connection” may be a fixed connection, or may be a detachable connection, or an integrated connection; the “connection” may be a mechanical connection, or may be an electrical connection or mutual communication; the “connection” may be a direct connection, or may be an indirect connection by using an intermediate medium; or the “connection” may be an internal connection of two elements or an interaction relationship between two elements. The “fastening” may be direct fastening, or may be fastening by using an intermediate medium. The “installation” may be detachable installation or fixed installation, or may be direct installation or indirect installation by using an intermediate medium. For a person of ordinary skill in the art, specific meaning of the foregoing terms in this application may be understood depending on a specific situation.

This application provides a photographing device. The photographing device may be any electronic device that can be used for photographing, such as a mobile phone, a tablet, or a compact camera. The photographing device includes a photographing module, to perform photographing by using the photographing module. The photographing module includes a lens actuating apparatus, an optical component, and a photosensitive chip. The optical component is installed on the lens actuating apparatus. The lens actuating apparatus is configured to drive the optical component installed on the lens actuating apparatus to move or rotate, to implement focusing and anti-shake of the photographing module including the lens actuating apparatus and the optical component.

In this application, the lens actuating apparatus includes a housing, a holder, a plurality of elastic members, a translation motor, and an axis-moving motor. The holder is accommodated in the housing, the optical component is fastened to the holder, and the optical component refracts or reflects light to change a propagation direction of the light, so that the light is reflected to the photosensitive chip and a clear image is obtained. All of the plurality of elastic members are connected between the housing and the holder, are configured to support the holder in the housing, and provide motion space for a movement of the holder in the housing. Both the translation motor and the axis-moving motor are located between the housing and the holder, and the translation motor and the axis-moving motor each include a fastening part and a movable part that moves relative to the fastening part. One of the fastening part and the movable part of the translation motor is fastened to the holder and the other of the fastening part and the movable part of the translation motor is fastened to the housing. A relative movement of the fastening part and the movable part of the translation motor drives the holder to move in a translation direction relative to the housing. One of the driving part and the movable part of the axis-moving motor is fastened to the holder and the other of the driving part and the movable part of the axis-moving motor is fastened to the housing. The axis-moving motor is configured to cooperate with the plurality of elastic members to drive the holder to rotate around a rotation axis relative to the housing. In this application, the rotation axis is parallel to the translation direction or perpendicular to the translation direction.

In this application, the translation motor and the axis-moving motor are disposed on the holder of the lens actuating apparatus, so that the translation motor is used to drive the optical component fastened to the holder to translate, so as to implement focusing and anti-shake of the photographing module including the optical component and the lens actuating apparatus. The axis-moving motor is used to drive the optical component fastened to the holder to rotate, to drive the optical component located on the holder to perform axis moving, so as to compensate for shake generated when the photographing module including the optical component and the lens actuating apparatus performs photographing, and implement anti-shake of the photographing module. In this application, the translation motor and the axis-moving motor are independent of each other, so that the translation motor and the axis-moving motor can work simultaneously, can further drive the holder to translate and rotate simultaneously, and can simultaneously implement focusing and anti-shake of a lens. In this way, control efficiency is higher to quickly obtain a clear image. In addition, in this application, the holder can rotate through cooperation between the axis-moving motor and the elastic members, with no need to dispose motors pairwise symmetrically around the holder, and with no need to control different driving forces of relative motors to the holder to implement rotation. In this way, a quantity of motors disposed around the holder can be reduced, and a volume occupied by the lens actuating apparatus can be decreased. In addition, because the quantity of motors is reduced, control on the motors can also be simplified and the control efficiency can be improved.

In some embodiments of this application, each of the elastic members is a two degree-of-freedom elastomer. The two degree-of-freedom elastomer is an elastomer in which elastic coefficients of the elastic member in two of three orthogonal directions are less than an elastic coefficient of the elastic member in the other direction, so that the elastic member is more easily deformed in two of the three orthogonal directions than in the other direction. In this application, the translation direction of the holder is parallel to a first direction, and an elastic coefficient in the first direction is less than an elastic coefficient in a second direction or an elastic coefficient in a third direction. A direction of the rotation axis is parallel to the second direction, a value of the elastic coefficient in the second direction is different from a value of the elastic coefficient in the third direction, and an elastic coefficient of the elastic member in the second direction may be greater than an elastic coefficient of the elastic member in the third direction, or may be less than an elastic coefficient of the elastic member in the third direction. In this application, based on an actual requirement, elastic members with different degree-of-freedom directions are selected and used at different positions of the holder, so that when the axis-moving motor exerts a force on the holder, the holder rotates because the elastic members disposed at the different positions of the holder have different elastic coefficients along a direction of the force exerted by the axis-moving motor on the holder. In this case, the holder rotates with no need to control different driving forces of the motors at the different positions of the holder on the holder. Therefore, control on the axis-moving motor is simplified, efficiency is improved, and the holder can be prevented from rotating in a non-rotation direction or a non-translation direction.

Further, in some embodiments of this application, the lens actuating apparatus further includes a plurality of position sensors. The position sensors one-to-one correspond to the axis-moving motor and the translation motor. A position closed loop can be formed by disposing the position sensors that one-to-one correspond to the axis-moving motor and the translation motor. The closed loop means that a feedback mechanism that has a capability of automatically correcting deviation of a controlled amount, and can correct an error caused by a parameter change of an element and external disturbance is used, so that control accuracy is high. In some embodiments of this application, the position sensor is a Hall (Hall) sensor. The Hall sensor can measure magnetic field strengths at different positions, and feed back the magnetic field strengths obtained through measurement to a drive controller. The drive controller controls movement directions and movement speeds of the translation motor and/or the axis-moving motor based on information obtained by the position sensor, to implement relatively accurate focusing and anti-shake operations.

Referring toFIG. 1andFIG. 2, specifically, an embodiment of this application provides a lens actuating apparatus100. The lens actuating apparatus100includes a housing (not shown in the figure), a holder20, a plurality of elastic members30, translation motors40, and axis-moving motors50. The housing includes an accommodation cavity. The holder20, the plurality of elastic members30, the translation motors40, and the axis-moving motors50all are accommodated in the accommodation cavity. The housing is configured to protect a structure disposed inside the housing. It may be understood that when the lens actuating apparatus100is disposed inside a photographing device, the housing may be fastened to a housing of the photographing device, or may be a housing of the photographing device. An optical component60is installed on the holder20, and moves with the holder20. It may be understood that “installation” in this application may be direct installation or indirect installation. For example, in this embodiment, the optical component60is first installed inside a mounting bracket60a, and then the mounting bracket60ais fastened to the holder20, so that the optical component60is indirectly installed on the holder20.

The optical component60includes a light incident surface61and a light emergent surface62that has an included angle with the light incident surface61. The light incident surface61has a light incident axis61aperpendicular to the light incident surface61, and the light incident axis61apasses through the center of the light incident surface61. The light emergent surface62has a light emergent axis62aperpendicular to the light emergent surface62, and the light emergent axis62apasses through the center of the light emergent surface62. It should be noted that the light incident axis61aand the light emergent axis62aare not actual axial lines. In other words, both the light incident axis61aand the light emergent axis62aare virtual lines. The included angle exists between the light incident surface61and the light emergent surface62of the optical component60. To be specific, the optical component60can change a propagation direction of light passing through the optical component.

The holder20includes a first surface21and a second surface22that are disposed oppositely, and a third surface23connected between the first surface21and the second surface22. The third surface23is far away from the light emergent surface62of the optical component60. The axis-moving motors50are symmetrically disposed on the first surface21and the second surface22. In this embodiment, there are two axis-moving motors50that are respectively disposed on a side of the first surface21and a side of the second surface22that are close to the third surface23. The translation motors40are located at the center of the third surface23, or the translation motors40are symmetrically disposed on the first surface21and the second surface22, and the translation motor40and the axis-moving motor50that are located on the same surface are arranged side by side along a direction of the light emergent axis. In this embodiment, the translation motors40are symmetrically disposed on the first surface21and the second surface22, and are disposed close to the light emergent surface62.FIG. 3andFIG. 4show a lens actuating apparatus200according to another embodiment of this application. The lens actuating apparatus200in the embodiment inFIG. 3differs from the lens actuating apparatus100in the embodiment inFIG. 1in that there is one translation motor40, and the translation motor40is disposed on a central plane of a third surface23. It may be understood that there may alternatively be a plurality of translation motors40. The plurality of translation motors40are arranged on the third surface23side by side along a direction from a first surface21to a second surface22, and the center of an overall structure obtained after the plurality of translation motors40are arranged side by side overlaps with the center of the third surface23. In this case, a holder20bears a same force on a side on which the first surface21is located and a side on which the second surface22is located, to avoid generating relatively large torque and a relatively large angle of inclination in a non-rotation direction due to uneven forces.

Referring toFIG. 1again, both the translation motors40and the axis-moving motors50are voice coil motors. The voice coil motor includes a magnet and a coil that moves relative to the magnet. Different currents are input into the coil, to control a magnitude of a Lorentz force between the coil and the magnet, so as to control, based on an actual requirement, an acting force for driving the holder20relative to the housing. The translation motor40includes a magnet41and a coil42that moves relative to the magnet41. The magnet41is a movable part of the translation motor40and is fastened to the holder20. The coil42is a fastening part of the translation motor40. The axis-moving motor50includes a magnet51and a coil52that moves relative to the magnet51. The magnet51is a movable part of the axis-moving motor50and is fastened to the holder20. The coil42is a fastening part of the translation motor40. A direction from an N pole to an S pole of the magnet41is the same as a direction of the light emergent axis62a, so that a Lorentz force along the direction of the light emergent axis62ais generated between the magnet41and the coil42. A direction from an N pole to an S pole of the movable part of the axis-moving motor50is the same as a direction of the light incident axis61a, so that a Lorentz force along the direction of the light incident axis61ais generated between the magnet51and the coil52. The axis-moving motors50cooperate with the elastic members30to generate rotation around a rotation axis perpendicular to the first surface21.

In this embodiment, because the direction from the N pole to the S pole of the magnet41is the same as the direction of the light emergent axis62a, the Lorentz force along the direction of the light emergent axis62ais generated between the magnet41and the coil42. In this way, a translation direction in which the holder20translates relative to the housing is parallel to the light emergent axis62a. The rotation axis of the elastic member is disposed to be perpendicular to both the light incident axis and the light emergent axis. When the lens actuating apparatus100is applied to a photographing module, the lens actuating apparatus100drives the optical component60to move along the direction of the light emergent axis, so that a distance between the optical component60and a photosensitive chip1003can be adjusted, to be specific, an imaging distance can be adjusted. In this way, focusing of the photographing module can be implemented. Moreover, the rotation axis is perpendicular to both the light incident axis and the light emergent axis, so that the holder20can drive the optical component60to implement anti-shake along the direction of the light emergent axis.

In some embodiments, the magnets (the magnet41and the magnet51) each include 2×n sub-magnets411, where n is a natural number greater than 0. In this embodiment, the magnet includes two sub-magnets411. N poles or S poles of adjacent sub-magnets411are opposite. Specifically, the magnet includes a first surface fastened to the holder and a second surface opposite to the first surface, the coil faces the second surface, and magnetic poles of the two adjacent sub-magnets411facing a side of the second surface are opposite. In this embodiment, each sub-magnet411is independent. It may be understood that, in another embodiment of this application, the sub-magnets of the magnet may be obtained in a specific magnetization manner. For example, in an embodiment of this application, the magnet is a single-side bipolar paired magnetized magnet, to be specific, two parts with opposite magnetic poles are formed for the magnet in the specific magnetization manner. The two parts with opposite magnetic poles are equivalent to two sub-magnets411.

In some embodiments of this application, each magnet is fastened with a position sensor70, and the position sensor70is located at a junction of two sub-magnets411at the center of the magnet. A magnetic field linear region is near the junction of the two sub-magnets411located at the center of the magnet, so that there is a linear relationship between a position change of a position relative to the coil and a magnetic field change of the position relative to the coil. There is a poor linear relationship between another position and the magnetic field change, and a position detection effect is poor.

In another embodiment of this application, the magnet is a single magnet, and a direction towards which an N pole of the magnet faces is opposite to a direction towards which an S pole of the magnet faces. The position sensor is fastened to the housing and faces a side face of the magnet, and the side face of the magnet is perpendicular to the direction towards which the N pole of the magnet faces and the direction towards which the S pole of the magnet faces. For example,FIG. 5shows a lens actuating apparatus300according to another embodiment of this application. The lens actuating apparatus300in the embodiment inFIG. 5differs from the lens actuating apparatus200in the embodiment inFIG. 3in that a magnet41of a translation motor40is a single magnet, an N pole of the magnet41is against a third surface23. Specifically, the magnet41of the translation motor40of the lens actuating apparatus300is a single cylindrical magnet, two sides of the magnet41in an axial direction are the N pole and an S pole, and a side face of the magnet41is a side face between the N pole and the S pole. A coil42of the translation motor40of the lens actuating apparatus300is a ring coil, and the ring coil is annularly disposed outside a side face of the cylindrical magnet. After being powered on, a Lorentz force along the axial direction of the magnet is generated between the coil and the magnet, so that the magnet41moves along the axial direction of the magnet relative to the coil42. In this embodiment, the side face of the magnet41is fastened with an induced magnet43, and a position sensor70is fastened to the housing and is opposite to the induced magnet43, to sense a position change of the induced magnet43, so as to obtain parameters such as a speed and a distance at which a holder20moves relative to the housing.

Further, referring toFIG. 5andFIG. 6, in some embodiments of this application, an outer surface of the magnet41is coated with a magnetic conductive housing44that has a magnetic conductive function and increases a main magnetic flux of the magnet41.

Referring toFIG. 1again, in this embodiment, the elastic member30is sheet-shaped, and the light incident axis61ais parallel to a plane on which the elastic members30are located, to be specific, the elastic members30are disposed perpendicular to the first surface21. The plane on which the elastic members30are located is parallel to the light incident axis61a, so that the elastic members30cannot be disposed along the direction of the light incident axis61a, to prevent the elastic members30from increasing a thickness of the lens actuating apparatus100along the direction of the light incident axis61a.

Further, in this application, because the elastic member30is a two degree-of-freedom elastomer, to be specific, elastic coefficients of the elastic member30in two of three orthogonal directions are less than an elastic coefficient of the elastic member30in the other direction, the elastic member30is more easily deformed in the two of the three orthogonal directions than in the other direction. In the lens actuating apparatus100shown inFIG. 1, the plurality of elastic members30are symmetrically disposed on the first surface21and the second surface22, and the elastic members30are disposed on both sides that are of the first surface21and the second surface22and that are close to the third surface23and sides that are of the first surface21and the second surface22and that are away from the third surface23. In this way, the holder20is stably supported in the housing. Specifically, in this embodiment, there are four elastic members30that are pairwise symmetrically disposed on the first surface21and the second surface22. In addition, in this embodiment, a first direction is the light emergent axis62a, a second direction is a direction perpendicular to the first surface21, and a third direction is the direction of the light incident axis61a. The elastic members30disposed on the first surface21and the second surface22each includes a translation elastic member30aand a common elastic member30b. Both an elastic coefficient of the translation elastic member30aalong the direction of the light emergent axis62aand an elastic coefficient of the translation elastic member30aalong a direction of the rotation axis are less than an elastic coefficient of the translation elastic member30aalong the direction of the light incident axis61a. To be specific, an elastic coefficient of the translation elastic member30ain the first direction and an elastic coefficient of the translation elastic member30ain the second direction are less than an elastic coefficient of the translation elastic member30ain the third direction. An elastic coefficient of the common elastic member30balong the direction of the rotation axis is greater than an elastic coefficient of the common elastic member30balong the direction of the light incident axis and an elastic coefficient of the common elastic member30balong the direction of the light emergent axis. To be specific, an elastic coefficient of the common elastic member30bin the first direction and an elastic coefficient of the common elastic member30bin the third direction are less than an elastic coefficient of the common elastic member30bin the second direction. In addition, in this embodiment, an elastic coefficient of the translation elastic member30aalong a direction parallel to the light incident axis61ais greater than an elastic coefficient of the common elastic member30balong the direction parallel to the light incident axis61a.

The translation elastic member30aand the common elastic member30bare respectively disposed on two sides of the first surface21and the second surface22along the direction of the light emergent axis. The translation elastic member30ais far away from the third surface23relative to the common elastic member30b, and the common elastic member30bis close to the third surface23relative to the translation elastic member30a. When the axis-moving motor50exerts a force on the holder20along the light incident axis61a, the elastic coefficient of the translation elastic member30ain the first direction is greater than the elastic coefficient of the common elastic member30bin the first direction, so that a deformation amount of the translation elastic member30ain the third direction is less than a deformation amount of the common elastic member30bin the third direction. Therefore, rotation by using the second direction (perpendicular to the first surface21) as a rotation axis is generated. In this application, the axis-moving motors50cooperate with the elastic members30to implement rotation of the holder20, and the holder rotates with no need to separately control different driving forces of motors at different positions of the holder on the holder. In this way, control on the axis-moving motor50is simplified, and efficiency is improved.

Specifically, referring toFIG. 7aandFIG. 7b, in an embodiment, a translation elastic member30aand a common elastic member30beach include a plurality of etched arms31that are disposed at intervals and head-to-tail connected. An extension direction of an etched arm31of the translation elastic member30ais parallel to a light incident axis, and an extension direction of an etched arm31of the common elastic member30bis perpendicular to a first surface21, so that both an elastic coefficient of the translation elastic member30aalong a direction of a light emergent axis and an elastic coefficient of the translation elastic member30aalong a direction of a rotation axis are less than an elastic coefficient of the translation elastic member30aalong a direction of the light incident axis61a, and an elastic coefficient of the common elastic member30balong the direction of the rotation axis is greater than an elastic coefficient of the common elastic member30balong the direction of the light incident axis61aand an elastic coefficient of the common elastic member30balong the direction of the light emergent axis62a. In this embodiment, the elastic member30is a metal component, and the plurality of head-to-tail connected etched arms31are obtained by bending a linear metal spring plate into a wave shape. Alternatively, in some embodiments, the etched arms31may be obtained by etching a metal plate.

In some other embodiments of this application, an axis-moving motor is disposed at the center of a third surface, and translation motors are symmetrically disposed on the first surface and a second surface, to drive a holder to rotate around the rotation axis perpendicular to the first surface, and translate in a movement direction that is the direction of the light emergent axis.FIG. 8andFIG. 9show a lens actuating apparatus400according to an embodiment of this application. The lens actuating apparatus400differs from the lens actuating apparatus100in that an axis-moving motor50is located in the center of a third surface23. In this case, an acting force exerted by the axis-moving motor50on a holder20is located on the third surface23and parallel to a light incident axis62a, so that the acting force exerted by the axis-moving motor50on the third surface23is greater than an acting force exerted by the axis-moving motor50on one side of a light emergent surface62. In this way, the holder20can rotate along a direction of a rotation axis perpendicular to a first surface21. In this embodiment, the acting force exerted by the axis-moving motor50on the third surface23is greater than the acting force exerted by the axis-moving motor50on the side of the light emergent surface62, so that the holder20can rotate along the direction of the rotation axis perpendicular to the first surface21. Therefore, elastic members30disposed on the first surface21and a second surface22each may be a common elastic member30b, to prevent the elastic members30from limiting translation and rotation of the holder20. It may be understood that, in this embodiment, structures and positions of the elastic members30on the first surface21and the second surface22may also be the same as structures and positions of the elastic members30in the lens actuating apparatus100.

In some other embodiments of this application, both the translation motor and the axis-moving motor are voice coil motors, and both movable parts of the translation motor and the axis-moving motor are magnets and are fastened to the holder. A direction from an N pole to an S pole of a fastening part of the translation motor40is perpendicular to a light emergent axis and a light emergent axis, and a directions from an N pole to an S pole of a fastening part of the axis-moving motor is the same as a direction of the light incident axis. A direction from an N pole to an S pole of a movable part of the translation motor is perpendicular to the light emergent axis and the light emergent axis, so that a direction of a Lorentz force between a magnet and a coil of the translation motor is perpendicular to a direction of the light emergent axis and the direction of the light incident axis, to drive the holder to translate along a direction perpendicular to the light emergent axis and the light incident axis. A direction from an N pole to an S pole of a movable part of the axis-moving motor is the same as the direction of the light incident axis, so that a direction of a Lorentz force between a magnet and a coil of the axis-moving motor is the direction of the light incident axis, to drive the holder to rotate along the direction of the rotation axis perpendicular to the light emergent axis and the light incident axis. To be specific, in these embodiments, a translation direction in which the translation motor drives the holder to move is parallel to a direction of a rotation axis in which the axis-moving motor drives the holder to rotate. In these embodiments, the axis-moving motors are symmetrically disposed on the first surface and the second surface, and the translation motor is located at the center of the third surface or the translation motors are symmetrically disposed on the first surface and the second surface, or the axis-moving motor is disposed at the center of the third surface and the translation motors are symmetrically disposed on the first surface and the second surface, so that the holder can be driven to rotate around the rotation axis perpendicular to the first surface, and translate in a movement direction that is the direction of the light emergent axis. Both the axis-moving motors and the translation motors are symmetrically disposed on the first surface and the second surface, or the axis-moving motor and the translation motor are disposed at the center of the third surface, so that forces of the first surface and the second surface are the same, to prevent from generating deflection and torques caused by different forces on the first surface and the second surface in a process of the translation or the rotation of the holder.

Specifically,FIG. 10shows a lens actuating apparatus500according to this application. A translation direction of a holder20in the lens actuating apparatus500is parallel to a direction that is of a rotation axis and in which the holder20rotates. The lens actuating apparatus500differs from the lens actuating apparatus100shown inFIG. 1in that a direction from an N pole of a translation motor40to an S pole of the translation motor40is perpendicular to both a light emergent axis62aand a light incident axis61a. The translation direction in which the translation motor40drives the holder20is parallel to the direction from the N pole of the translation motor40to the S pole of the translation motor40. In addition, a plane on which a translation elastic member30aand a common elastic member30bare located is parallel to the light emergent axis62a, to ensure that both elastic coefficients of the translation elastic member30aand the common elastic member30bin the translation direction are relatively small, and prevent the translation elastic member30aand the common elastic member30bfrom limiting a translation process of the holder20.

FIG. 11andFIG. 12show a lens actuating apparatus600according to this application. The lens actuating apparatus600differs from the lens actuating apparatus500in that an axis-moving motor50is disposed at the center of a third surface23, and translation motors40are symmetrically disposed on a first surface21and a second surface22. In addition, in this embodiment, each of elastic members30of the lens actuating apparatus600is a common elastic member30b. To be specific, an elastic coefficient of the elastic member30in a translation direction of a holder and an elastic coefficient of the elastic member30along a direction perpendicular to the translation direction and a rotation axis are less than an elastic coefficient of the elastic member30along a direction of the rotation axis. In this embodiment, both an elastic coefficient of the elastic member30along a direction of a light emergent axis62aand an elastic coefficient of the elastic member30along a direction of a light incident axis61aare less than an elastic coefficient of the elastic member30along a direction perpendicular to the light emergent axis62aand the light incident axis61a. The axis-moving motor50is disposed on the third surface23, so that a force exerted by the axis-moving motor50on a side of the third surface23of the holder20is greater than a force exerted by the axis-moving motor50on one side of a light emergent surface62. When both the elastic coefficient of the elastic member30along the direction of the light emergent axis62aand the elastic coefficient of the elastic member30along the direction of the light incident axis61aare less than the elastic coefficient of the elastic member30along the direction perpendicular to the light emergent axis62aand the light incident axis61a, rotation along the direction of the rotation axis perpendicular to the first surface21is generated. In addition, when both the elastic coefficient of the elastic member30along the direction of the light emergent axis62aand the elastic coefficient of the elastic member30along the direction of the light incident axis61aare less than the elastic coefficient of the elastic member30along the direction perpendicular to the light emergent axis62aand the light incident axis61a, the holder20can translate along the direction of the light emergent axis62a, but movement of the holder along the direction perpendicular to the first surface21is limited. The holder20is prevented from moving along a direction in which the movement does not need to be performed, to implement accurate control on the movement of the holder20. In this embodiment, each of common elastic members includes a plurality of etched arms31that are disposed at intervals and head-to-tail connected, and an extension direction of an etched arm31is perpendicular to the light incident axis61aand the light emergent axis62a, so that both the elastic coefficient of the elastic member30along the direction of the light emergent axis62aand the elastic coefficient of the elastic member30along the direction of the light incident axis61aare less than the elastic coefficient of the elastic member30along the direction perpendicular to the light emergent axis62aand the light incident axis61a.

FIG. 13shows another lens actuating apparatus700according to this application. The lens actuating apparatus700differs from the lens actuating apparatus600in that a magnet of a translation motor of the lens actuating apparatus700is a single magnet that is the same as that of the translation motor in the lens actuating apparatus300.

This application further provides a lens actuating apparatus. An optical component of the lens actuating apparatus includes a single reflection plane and has a single optical axis. To be specific, a light incident surface and a light emergent surface of the optical component each is the reflection plane. Light is incident to the reflection plane, and is reflected by the reflection plane before being emitted. A central axis of the reflection plane is the optical axis. It may be understood that the optical axis is a virtual axis instead of an actual axis.FIG. 14andFIG. 15show another lens actuating apparatus800according to this application. An optical component60of the lens actuating apparatus800includes a single reflection plane64and has a single optical axis64a. Each of elastic members30is sheet-shaped and the optical axis64ais perpendicular to a plane on which the elastic members30are located, so that an elastic coefficient of the elastic member30along a direction of the optical axis64ais relatively small, and a holder20can move relatively easily along the direction of the optical axis64a. The lens actuating apparatus800in this embodiment differs from the lens actuating apparatus100inFIG. 1in that there are one translation motor40and one axis-moving motor50, and the translation motor40and the axis-moving motor50are arranged side by side along the direction of the optical axis64a, and are built in a side face that is of the holder20and that is parallel to the optical axis64a. Side faces that are of the holder20and that are parallel to the optical axis64ainclude a first side face20aand a second side face20bthat are opposite, and a third side face20cconnected between the first side face20aand the second side face20b. Two accommodation grooves24are recessed on the third side face20c. The translation motor40and the axis-moving motor50are separately accommodated in one accommodation groove24, so that the translation motor40and the axis-moving motor50are built in the third side face20c, and further, the translation motor40and the axis-moving motor50are enabled to approach the geometric center of the holder20, to prevent the translation motor40or the axis-moving motor50from exerting a force on the holder20to deviate from a required position, and further prevent the holder20from generating a relatively large torque and a relatively large angle of inclination in a non-rotation direction.

In this embodiment, the elastic members30are disposed on the first side face20aand the second side face20b, and are disposed along a direction perpendicular to a movement direction. In addition, in this embodiment, the elastic members30disposed on the first side face20aand the second side face20beach include a translation elastic member30aand a common elastic member30bthat have same structures as those of the lens actuating apparatus100. Specifically, both an elastic coefficient of the translation elastic member30aalong the direction of the optical axis64aand an elastic coefficient of the translation elastic member30aalong a direction parallel to the first side face20aare less than an elastic coefficient of a direction perpendicular to the first side face20a. Both an elastic coefficient of the common elastic member30balong the direction of the optical axis64aand an elastic coefficient of the common elastic member30balong the direction perpendicular to the first side face20aare less than an elastic coefficient of the common elastic member30balong the direction parallel to the first side face20a. The translation elastic member30aand the common elastic member30bare respectively disposed on two sides of the first side face20aand the second side face20balong the direction of the optical axis64a. The translation elastic member30ais close to the reflection plane64relative to the common elastic member30b, and the common elastic member30bis far away from the reflection plane64relative to the translation elastic member30a.

In this embodiment, a translation direction in which the holder20of the lens actuating apparatus800translates relative to a housing10is parallel to the direction of the optical axis64a, and a direction that is of a rotation axis and in which the holder20rotates relative to the housing10is perpendicular to the translation direction, so that when the lens actuating apparatus100is applied to a photographing module, translating the holder20along the translation direction can implement focusing, and rotating the holder20by using the rotation axis as an axis to implement axis moving of the photographing module. In this way, shake is compensated and anti-shake is implemented.

The translation elastic member30ais close to the reflection plane relative to the common elastic member30b, and the common elastic member30bis far away from the reflection plane relative to the translation elastic member30a. Therefore, an elastic coefficient of the translation motor40is relatively large along the direction of the light incident axis64a, and an elastic coefficient of the common elastic member30bis relatively small along the direction of the light incident axis64a. In this case, when the axis-moving motor50exerts the force on the holder20along the direction parallel to the first side face20a, deformation of the translation elastic member30aalong the direction parallel to the first side face20ais less than deformation of the common elastic member30balong the direction parallel to the first side face20a. In this way, rotation along a direction of the rotation axis perpendicular to the first side face20ais generated.

In this embodiment, the translation elastic member30aand the common elastic member30beach include a plurality of etched arms31that are disposed at intervals and head-to-tail connected. An extension direction of an etched arm31of the translation elastic member30ais perpendicular to the first side face20a, and an etched arm31of the common elastic member30bis parallel to the first side face20a, so that both the elastic coefficient of the translation elastic member30aalong the direction of the optical axis64aand the elastic coefficient of the translation elastic member30aalong the direction parallel to the first side face20aare less than the elastic coefficient of the translation elastic member30aalong the direction perpendicular to the first side face20a. Both the elastic coefficient of the common elastic member30balong the direction of the optical axis64aand the elastic coefficient of the common elastic member30balong the direction perpendicular to the first side face20aare less than the elastic coefficient of the common elastic member30balong the direction parallel to the first side face20a.

FIG. 16shows a periscope photographing module1000according to an embodiment of this application. An arrow direction in the figure represents a propagation path of light inside the periscope photographing module1000. The periscope photographing module1000includes a first reflector1001, a lens group1002, a photosensitive chip1003, and the lens actuating apparatus in any one of the foregoing embodiments. An optical component60installed on a holder20of the lens actuating apparatus includes the first reflector1001and the lens group1002. The holder20, the optical component60, and the photosensitive chip1003all are accommodated in a housing80of the lens actuating apparatus, and the photosensitive chip1003is fastened in the housing80. A light incident hole81is disposed on the housing80, and the first reflector1001faces the light incident hole1001. Light entering from the light incident hole81is reflected by the first reflector1001, and then passes through the lens group1002, and is transmitted to the photosensitive chip1003.

Referring toFIG. 17, in an embodiment of this application, a lens actuating apparatus in the periscope photographing module1000is the lens actuating apparatus100shown inFIG. 1. A translation motor40and an axis-moving motor50of the lens actuating apparatus100drive a first reflector1001and a lens group1002to move, to implement focusing or anti-shake. Specifically, the translation motor40drives the first reflector1001and the lens group1002to move along a direction parallel to a light emergent axis62a, to change a distance between the lens group1002and a photosensitive chip1003, so as to implement focusing. The axis-moving motor50drives the first reflector1001and the lens group1002to rotate around a rotation axis perpendicular to a first surface21, so that a direction of an optical axis of the lens group1002is changed, to compensate for shake of the periscope photographing module1000, thereby implementing anti-shake. It may be understood that, in another embodiment of this application, when the lens actuating apparatus in the periscope photographing module1000is the lens actuating apparatus600shown inFIG. 11or the lens actuating apparatus700shown inFIG. 13, a translation direction in which the translation motor40drives a holder20to translate is the same as a direction that is of the rotation axis and in which the axis-moving motor50drives the holder20to rotate. Specifically, the translation motor40drives the first reflector1001and the lens group1002that are installed on the holder20to move along the direction perpendicular to the first surface21, to change a position of the optical axis of the lens group1002, and implement anti-shake along the direction perpendicular to the first surface21. The axis-moving motor50drives the first reflector1001and the lens group1002to rotate around the rotation axis perpendicular to the first surface21, so that a direction of an optical axis64ais changed, and anti-shake along a direction parallel to the first surface21is implemented. Therefore, in this application, focusing and anti-shake or anti-shake in a multi-degree-of-freedom direction can be implemented by disposing different types of lens actuating apparatuses in the periscope photographing module1000.

Referring toFIG. 16andFIG. 17, in this embodiment, the first reflector1001is a triangular lens that is indirectly fastened to the holder20. The triangular lens includes a light incident surface61, a light emergent surface62, and a reflective surface63that are connected to each other. The light incident surface63of the triangular lens is parallel to a light incident surface61of the optical component60, and the light emergent surface62of the triangular lens is parallel to a light emergent surface62of the optical component60. To be specific, the light emergent surface62of the triangular lens is perpendicular to the light incident surface63of the triangular lens. Both an included angle between the reflective surface63of the triangular lens and the light emergent surface62of the triangular lens, and an included angle between the reflective surface63of the triangular lens the light incident surface63of the triangular lens are 45°, so that light incident from the light incident surface63is reflected by the reflective surface63and then is emitted from the light emergent surface62. Specifically, the first reflector1001is first fastened to a mounting bracket60a, and then the mourning bracket60ais fastened in the holder20. The lens group1002is also fastened to the mounting bracket60aand is located at a position of the light emergent surface62of the first reflector1001, so that the light reflected by the first reflector1001enters the lens group1002. The lens group1002includes a plurality of lenses, and the light incident to the lens group1002is refracted by using the plurality of lenses in the lens group1002, and then the light is projected onto the photosensitive chip1003. The photosensitive chip1003is located at a position away from the first reflector1001relative to the lens group1002, so that the light emitted from the lens group1002is projected onto the photosensitive chip to form an image. It may be understood that, in another embodiment, the first reflector1001and the lens group1002can alternatively be directly fastened in the holder20.

Further, in some embodiments of this application, a planoconvex lens1006is stacked on the light incident surface63of the first reflector1001. The planoconvex lens1006is configured to converge more external light on the periscope photographing module, to obtain a clearer image.

FIG. 18shows another periscope photographing module2000according to this application. The periscope photographing module2000differs from the periscope photographing module1000in that one lens actuating apparatus is further disposed between a lens group1002and a photosensitive chip1003, a second reflector1005is installed on the lens actuating apparatus between the lens group1002and the photosensitive chip1003, and the second reflector1005is configured to reflect light passing through the lens group to the photosensitive chip1003. In addition, focusing and anti-shake are jointly implemented through translation and rotation of the lens actuating apparatus100on which the second reflector1005is installed and a lens actuating apparatus100on which a first reflector1001is installed. It may be understood that the lens actuating apparatus on which the second reflector is installed may be the lens actuating apparatus in any one of the foregoing embodiments. In addition, in this embodiment, movement of any one of the lens actuating apparatus on which the first reflector1001is installed and the lens actuating apparatus on which the second reflector1005is installed is controlled, or movement jointly cooperated by the lens actuating apparatus on which the first reflector1001is installed and the lens actuating apparatus on which the second reflector1005is installed is controlled, so that focusing and anti-shake operations of the periscope photographing module1000can be implemented. In an embodiment of this application, the lens actuating apparatus on which the second reflector1005is installed is the lens actuating apparatus800shown inFIG. 14, and the second reflector1005is a planar reflector and has a single reflection plane.

FIG. 19shows a periscope photographing module3000according to another embodiment of this application. The periscope photographing module3000differs from the periscope photographing module1000in that one second reflector1006is further disposed between a lens group1002and a photosensitive chip1003of the periscope photographing module3000, and the second reflector1006is fastened to a housing10of a lens actuating apparatus, that is, fastened relative to the photosensitive chip1003, so that the second reflector1006reflects light passing through the lens group1002to the photosensitive chip1003. In this way, a size of the periscope photographing module3000along a direction of an optical axis of the lens group1002is reduced.

FIG. 20shows a periscope photographing module4000according to another embodiment of this application. The periscope photographing module4000differs from the periscope photographing module2000in that the periscope photographing module4000includes only a lens actuating apparatus for fastening a second reflector1005, a first reflector1001, a lens group1002, and a photosensitive chip1003are all fastened to a housing. To be specific, positions of the first reflector1001, the lens group1002, and the photosensitive chip1003are all relatively fastened. Movement of the lens actuating apparatus on which the second reflector1005is installed is controlled, to change a distance at which light is emitted from the lens group and is reflected to the photosensitive chip, or change an angle an optical axis64awhen the lens group reflects light to the photosensitive chip, so as to further implement focusing and anti-shake of the periscope lens module4000.

This application further provides a photographing device. The photographing device includes a housing and a periscope photographing moduli, and the periscope photographing module is installed in the housing. A light incident hole is disposed on the housing, and light enters the periscope photographing module from the light incident hole. A control unit is further disposed inside the housing of the mobile terminal. In this embodiment, the control unit is a PCB and a control circuit is disposed on the PCB. A translation motor, an axis-moving motor, and a photosensitive chip all are electrically connected to the control unit, and the control unit is configured to receive and analyze an image of the photosensitive chip to determine a proper corrected motion value and send one or more electrical signals to a corresponding translation motor and/or a corresponding axis-moving motor, so that the translation motor and/or the axis-moving motor drive/drives a holder and an optical component installed on the holder to generate a corrective motion. In this embodiment, both coils of the translation motor and the axis-moving motor are connected to the control unit by using flexible printed circuit (FPC) boards. After receiving the image of the photosensitive chip to determine the proper corrected motion value, the control unit transmits a control signal to the coils of the translation motor and the axis-moving motor by using the flexible printed circuit (FPC) boards, to be specific, a value of a current transmitted to the coils is controlled, so as to control values of driving forces of different motors on the holder, and control the holder to drive the optical component located on the holder to move. In this way, focusing and axis moving of the periscope photographing module in the photographing device are implemented.

In this application, the periscope lens module is disposed in the photographing device, so that external light enters the lens group after being reflected, and the lens group can form an included angle with a light incident axis of the light incident hole. In this way, the direction of the optical axis of the lens group can be different from a thickness direction of the photographing device, to eliminate a limitation of a length of the direction of the optical axis of the lens group on a thickness of the photographing device, and implement thinness of the photographing device. Further, the translation motor and the axis-moving motor are disposed on the holder of the lens actuating apparatus, so that the translation motor is used to drive the optical component fastened to the holder to translate, so as to implement focusing and anti-shake of the periscope lens module including the optical component and the lens actuating apparatus. The axis-moving motor is used to drive the optical component fastened to the holder to rotate, to drive the optical component located on the holder to perform axis moving, so as to compensate for shake generated when the photographing module including the optical component and the lens actuating apparatus performs photographing, and implement anti-shake of the photographing module. In this application, the translation motor and the axis-moving motor are independent of each other, so that the translation motor and the axis-moving motor can work simultaneously, can further drive the holder to translate and rotate simultaneously, and can simultaneously implement focusing and anti-shake of the optical component installed on the holder. In this way, control efficiency is higher to quickly obtain a clear image. In addition, in this application, the holder can rotate through cooperation between the axis-moving motor and the elastic members, with no need to dispose motors pairwise symmetrically around the holder, and with no need to control different driving forces of relative motors to the holder to implement rotation. In this way, a quantity of motors disposed around the holder can be reduced, and a volume occupied by the lens actuating apparatus can be decreased. In addition, because the quantity of motors is reduced, control on the motors can also be simplified and the control efficiency can be improved.