CN113660401A

CN113660401A - Lens assembly, camera module and electronic equipment

Info

Publication number: CN113660401A
Application number: CN202110943267.4A
Authority: CN
Inventors: 宋宏伟; 陈广龙; 阙海波; 高军科
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2021-11-16

Abstract

The application discloses camera lens subassembly, camera module and electronic equipment belongs to electronic equipment technical field. The lens assembly includes: the first lens group is arranged in the base and movably connected with the base, the first driving mechanism is electrically connected with the first lens group through the flexible circuit board, the first driving mechanism drives the first lens group to extend in a direction away from the base or retract in a direction close to the base, the displacement sensor is connected with the control chip and is connected with the first driving mechanism, and the displacement sensor is used for detecting the displacement of the first lens group relative to the base; wherein, under the condition that the control chip controls the first driving mechanism to drive the first lens group, the control chip can correct the position of the first lens group according to the displacement. The technical scheme provided by the application can solve the problem that the focusing time of the camera in the related technology is long.

Description

Lens assembly, camera module and electronic equipment

Technical Field

The application belongs to the technical field of electronic equipment, concretely relates to lens subassembly, camera module and electronic equipment.

Background

At present, photographing has become one of the core requirements of consumers for purchasing electronic devices such as mobile phones, tablet computers and the like. In order to obtain a more focused and higher definition picture, an Auto Focus (AF) camera is usually installed in a limited space of the electronic device.

The AF camera mostly adopts an open-loop motor automatic focusing system, a signal is given by a control end, a driving chip can output a corresponding current, a motor can drive a lens to do corresponding displacement, an image is formed on a photosensitive chip, the photosensitive chip obtains the image and then outputs the image to the control end, the control end judges whether the clearest position is reached according to the definition of the image, a signal is output again to the driving chip according to a judgment result, the position of the lens is adjusted, finally, the lens is adjusted to a target position, the imaging definition is enabled to be in a given range, and an image with high definition is obtained. However, such a manner makes it necessary to make a judgment based on the imaging sharpness of the photosensitive chip every time for adjustment of the lens position, resulting in a long time for adjusting the lens assembly to the target position.

Disclosure of Invention

The embodiment of the application aims to provide a lens component, a camera module and electronic equipment, which can solve the problem that the focusing time of a camera in the related technology is long.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a lens assembly, including: the lens group comprises a base, a first lens group, a first driving mechanism, a displacement sensor, a control chip and a flexible circuit board, wherein the first lens group is arranged in the base and movably connected with the base, the first driving mechanism is electrically connected with the first lens group through the flexible circuit board and drives the first lens group to extend in a direction away from the base or retract in a direction close to the base, the displacement sensor is connected with the control chip and is connected with the first driving mechanism, and the displacement sensor is used for detecting the displacement of the first lens group relative to the base;

wherein, under the condition that the control chip controls the first driving mechanism to drive the first lens group, the control chip can also correct the position of the first lens group according to the displacement.

In a second aspect, an embodiment of the present application further provides a camera module, which includes a lens barrel, a photosensitive chip, and the lens assembly according to the first aspect, where the photosensitive chip and the lens assembly are disposed in the lens barrel.

In a third aspect, an embodiment of the present application further provides an electronic device, including the camera module according to the second aspect.

In this application embodiment, displacement sensor can detect the displacement volume of first lens group for the base in real time, and control chip controls first actuating mechanism operation according to the displacement volume that displacement sensor detected, and then first actuating mechanism can drive first lens group and stretch out or withdraw to the direction that is close to the base to the direction of keeping away from the base, and control chip can also correct the position of first lens group according to the displacement volume. Like this, through the displacement volume of displacement sensor real-time detection first lens group for the base, just also can adjust first lens group to the target location that can obtain the high definition image fast, need not to judge whether first lens group moves to the target location through the imaging definition of sensitization chip, just also can effectively shorten the camera module and adjust the length of time of lens group to the target location to realize focusing fast.

Drawings

Fig. 1 is an exploded view of a lens assembly according to an embodiment of the present disclosure;

fig. 2 is a second exploded view of a lens assembly according to an embodiment of the present disclosure;

fig. 3 is a sectional view of a lens assembly provided in an embodiment of the present application, in which a first lens group is not moved relative to a base;

fig. 4 is a sectional view of a first lens group of a lens assembly elevated relative to a base according to an embodiment of the present disclosure;

fig. 5 is an assembly schematic diagram of a lens assembly provided in an embodiment of the present application;

FIG. 6a is a schematic diagram of the operation of a prior art related art lens assembly;

fig. 6b is a schematic diagram of an operation of a lens assembly according to an embodiment of the present disclosure;

fig. 7 is a structural diagram of a camera module according to an embodiment of the present disclosure;

fig. 8 is a sectional view of the second lens group in a camera module according to an embodiment of the present application, which is elevated with respect to the first lens group.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The embodiment of the application provides a lens assembly.

Referring to fig. 1 to 5, the lens assembly includes: the lens driving device comprises a base 11, a first lens group 12, a first driving mechanism 13, a displacement sensor 14, a control chip (not shown) and a flexible circuit board 15, wherein the first lens group 12 is arranged in the base 11, the first lens group 12 is movably connected with the base 11, the first driving mechanism 13 is electrically connected with the first lens group 12 through the flexible circuit board 15, the first driving mechanism 13 drives the first lens group 12 to extend in a direction away from the base 11 or retract in a direction close to the base 11, the displacement sensor 14 is connected with the control chip and is connected with the first driving mechanism 13, and the displacement sensor 14 is used for detecting the displacement of the first lens group 12 relative to the base 11; wherein, under the condition that the control chip controls the first driving mechanism 13 to drive the first lens group 12, the control chip can also correct the position of the first lens group 12 according to the displacement.

In the lens assembly provided in the embodiment of the present application, the flexible circuit board 15 is electrically connected to the first driving mechanism 13, and the flexible circuit board 15 may be powered on to control the first driving mechanism 13 to be in an operating state. For example, the first driving mechanism 13 may include a motor and a transmission shaft, and the flexible circuit board 15 drives the transmission shaft to operate by supplying power to the motor so as to operate the motor, so that the first driving mechanism 13 is in an operating state; the transmission shaft can be provided with threads, the first lens group 12 is in threaded connection with the transmission shaft, and then the motor rotates forwards or backwards, so that the transmission shaft can be driven to rotate forwards or backwards, and then the first lens group 12 can be driven to extend out in the direction far away from the base 11 or retract in the direction close to the base 11. Alternatively, the first driving mechanism 13 may also be in other structural forms capable of achieving telescopic motion, and embodiments of the present application are not listed.

The lens assembly provided by the embodiment of the present application is applied to a camera module of an electronic device. The camera module further comprises a photosensitive chip and a lens barrel used for installing the photosensitive chip and the lens assembly, and the lens assembly is used for collecting images to form images on the photosensitive chip to achieve the shooting function of the camera module. The lens assembly that this application embodiment provided, base 11 can be in being fixed in the lens cone, and base 11 has seted up logical unthreaded hole to make light can form images on the sensitization chip through the logical unthreaded hole on first lens group 12 and the base 11, the imaging principle of camera module can refer to correlation technique, and this application embodiment is not repeated.

In the embodiment of the present application, the displacement sensor 14 can detect the displacement of the first lens group 12 relative to the base 11 in real time, and can transmit the detected displacement to the control chip, the control chip controls the first driving mechanism 13 to be in an operating state according to the displacement detected by the displacement sensor 14, and the first driving mechanism 13 can drive the first lens group 12 to move relative to the base 11, so that the first lens group 12 extends in a direction away from the base 11 or retracts in a direction close to the base 11. In the process of the movement of the first lens group 12 relative to the base 11, the displacement of the first lens group 12 relative to the base 11 changes, and the displacement can be detected by the displacement sensor 14 and transmitted to the control chip, the control chip can control the operation of the first driving mechanism 13 according to the real-time detected displacement, for example, the first driving mechanism 13 is a motor, and can control the motor to rotate forward or backward, so as to correct the relative position of the first lens group 12 and the base 11, i.e., adjust the relative position of the first lens group 12 and the photosensitive chip, and perform the focal length adjustment by controlling the movement of the first lens group 12, so that the focal point is located on the photosensitive chip, thereby obtaining a clear image.

Like this, through the displacement volume of displacement sensor 14 real-time detection first lens group 12 for the base 11, also can adjust first lens group 12 to the target location that can obtain the high definition image fast, need not to judge through the imaging definition of sensitization chip whether first lens group 12 moves to the target location, also can effectively shorten the camera module and adjust the length of time of lens group to the target location to realize focusing fast.

For better understanding, please refer to fig. 6a and 6b, fig. 6a is a schematic diagram illustrating an operation of a lens assembly in the related art, and fig. 6b is a schematic diagram illustrating an operation of a lens assembly provided in an embodiment of the present application. As shown in fig. 6a, in the process of implementing focusing of the current lens module, a signal code is sent to a motor driving chip through a platform control end, and then the motor driving chip outputs a corresponding current value to a motor according to the received signal code to control the motor to operate, the operation of the motor drives a lens to displace, so that light passing through the lens is imaged on a photosensitive chip, the photosensitive chip outputs an image to the platform control end, the platform control end judges whether the lens moves to a target position according to the definition of the received image, if not, the above procedure is repeated continuously until the definition of the received image meets the requirement, the lens is stopped from moving, and thus focusing is completed.

In the embodiment of the present application, as shown in fig. 6b, in a focusing process of the lens assembly provided in the embodiment of the present application, the platform control end sends a signal code to the motor driving chip (i.e., the control chip), and the motor driving chip outputs a corresponding current value to the motor (i.e., the first driving mechanism) according to the received signal code to control the motor to operate, the operation of the motor drives the lens (i.e., the first lens group) to displace, at this time, a displacement amount of the lens is detected by the displacement sensor, and the detected displacement amount is fed back to the motor driving chip in real time, and the motor driving chip adjusts output of the current value according to the detected displacement amount, so that the lens is quickly moved to a target position by the motor, thereby achieving focusing. It can be seen that the scheme that this application embodiment provided just can adjust the camera lens to the target location that can obtain the high definition image fast through displacement sensor's detection, need not to judge through the imaging definition of sensitization chip feedback, just so can effectively shorten the camera module and adjust the length of time of camera lens to the target location to realize accurate, focus fast, improved focusing speed and focusing precision, imaging speed is faster, can provide better shooting experience for the user.

Alternatively, the displacement sensor 14 in the embodiment of the present application may be a Tunnel Magnetoresistive (TMR) sensor, which has a small volume and a high resolution, so that the lens assembly can obtain an image with higher imaging quality.

In addition, under the condition that the first driving mechanism 13 is a motor, the motor only needs to control the movement of the first lens group 12, and then the volume of the motor can be designed to be smaller, so that the overall volume of the camera module and the electronic device can be effectively reduced, and the development of the electronic device towards light and thin is facilitated.

Referring to fig. 2 to 4, the first driving mechanism 13 includes a first driving member 131 and a second driving member 132, the first driving member 131 is connected to the flexible circuit board 15, and the second driving member 132 is connected to the first lens group 12; the control chip is used for controlling the first driving element 131 to be in a working state according to the displacement, the first driving element drives the second driving element 132 to move, and the second driving element 132 drives the first lens group 12 to extend in a direction away from the base 11 or retract in a direction close to the base 11.

For example, the first driving member 131 is a motor, the second driving member 132 is a transmission shaft, and the first lens group 12 can be a transmission rod having a threaded connection with the transmission shaft. Further, the forward rotation or reverse rotation of the motor can drive the transmission shaft to rotate forward or reverse, so as to drive the first lens group 12 to extend or retract relative to the base 11. In this way, the first lens group 12 is controlled by the flexible circuit board 15 through the first driving member 131 and the second driving member 132, so as to ensure that the first lens group 12 can move relative to the base 11, as shown in fig. 3 and 4, the first lens group 12 can displace relative to the base 11, and thus focusing can be achieved.

Alternatively, one of the first driving member 131 and the second driving member 132 is a coil, and the other is a magnetic member, and the displacement sensor 14 is used for detecting the magnitude of the magnetic flux between the first driving member 131 and the second driving member 132 to determine the displacement amount of the first lens group 12 relative to the base 11. For example, the first driving element 131 is a coil, the second driving element 132 is a magnetic element, the coil is connected to the flexible circuit board 15, the magnetic element is connected to the first lens group 12, and the magnetic element may be sleeved on an outer sidewall of the first lens group 12 or bonded to a side of the first lens group 12 facing the photo-sensing chip. The control chip can energize the coil through the flexible circuit board 15, and the coil generates electromagnetic force to the magnetic member after being energized, so as to drive the magnetic member to move, and the movement of the magnetic member can drive the first lens group 12 connected with the magnetic member to move. For example, when the flexible circuit board 15 outputs a current in a first current direction to the coil, the coil generates a repulsive force to the magnetic member, and then the magnetic member is driven to drive the first lens group 12 to move in a direction away from the base 11, and when the flexible circuit board 15 outputs a current in a second current direction to the coil, the coil generates an attractive force to the magnetic member, and then the magnetic member is driven to drive the first lens group 12 to move in a direction close to the base 11, and the first current direction is opposite to the second current direction. Thus, by the arrangement of the coil and the magnetic member, the control of the first lens group 12 can be realized, so that the first lens group 12 is driven to move relative to the base 11 by the electromagnetic force generated between the coil and the magnetic member, thereby realizing the adjustment of the focal length.

Further, the control chip can also adjust the magnitude of the current applied to the coil through the flexible circuit board 15, and then can adjust the magnitude of the magnetic flux between the coil and the magnetic member, and can also adjust the magnitude of the repulsive force or attractive force generated by the coil on the magnetic member, so as to control the displacement of the magnetic member relative to the coil, and thus can control the displacement of the first lens group 12 relative to the base 11. Thus, the displacement sensor 14 can determine the displacement of the first lens group 12 relative to the base 11 by detecting the magnitude of the magnetic flux between the coil and the magnetic member, and the control chip can adjust the current value input by the flexible circuit board 15 to the coil according to the displacement detected by the displacement sensor 14, so as to correct the displacement of the first lens group 12 relative to the base 11 until the first lens group 12 is adjusted to the target position and stabilized at the target position, so as to obtain an image with high imaging definition. Compare in the image definition that needs to feed back through the sensitization chip among the prior art, could confirm whether first lens group 12 reaches the target location, the design that this application provided, accessible displacement sensor 14 in time feeds back the position that first lens group 12 was located to the current value of adjustment input coil makes it more be close the focus, and the time of focusing is shorter, can realize accurately focusing fast, and imaging quality is also more clear.

In the embodiment of the present application, the first lens group 12 is movably connected to the base 11, so that the displacement of the first lens group 12 relative to the base 11 can be changed. For example, the first lens group 12 can be provided with a pulley, the base 11 can be provided with a slide rail, and the first lens group 12 can be displaced relative to the base 11 through the pulley.

Alternatively, referring to fig. 1 and 2, the lens assembly further includes an elastic member 16, one end of the elastic member 16 is connected to the base 11, and the other end is connected to the first lens group 12. Thus, the first lens group 12 can be displaced relative to the base 11 by the expansion and contraction of the elastic member 16.

Further, the first lens group 12 includes a first lens group 122 and a first lens holder 121 for holding the first lens group 122, the elastic element 16 includes a first spring 161 and a second spring 162 that are elastically connected, the first spring 161 is connected to the first lens holder 121, the second spring 162 is connected to the base 11, and the second spring 162 is sleeved outside the first spring 161. The first lens holder 121 may be an annular structure, and the first lens holder 121 is sleeved outside the first lens group 122 and bonded to the first lens group 122, so as to ensure the stability of the connection between the first lens holder 121 and the first lens group 122. The first lens holder 121 is connected to the first spring 161, for example, the first spring 161 may be bonded or clamped, the second spring 162 is connected to the base 11, for example, bonded or clamped, that is, the first spring 161 and the first lens holder 121 are relatively fixed, the second spring 162 and the base 11 are relatively fixed, and the first spring 161 and the second spring 162 are elastically connected, for example, a spring is disposed between the first spring 161 and the second spring 162, so that the first spring 161 can move relative to the second spring 162, so as to ensure that the first lens group 122 can move relative to the base 11, and to ensure that the focusing function is realized.

Optionally, the first driving element 131 is a coil fixed on the base 11, and the second driving element 132 includes at least two magnetic members, the at least two magnetic members are disposed on an outer sidewall of the first lens holder 121 at intervals, and the at least two magnetic members surround to form an annular structure. The coil and the base 11 may be fixed by adhesion, for example, the coil and the base 11 may be adhered to the inner side wall of the base 11; the at least two magnetic members may also be fixed on the outer sidewall of the first lens holder 121 by bonding, so as to ensure the stability of the connection between the magnetic members and the first lens holder 121.

As shown in fig. 2, the number of the magnetic members is three, and the three magnetic members are sequentially arranged at intervals and surround the ring-shaped structure. The number of the magnetic members may be any number of magnetic members that form a ring around the magnetic member group so as to correspond to the ring-shaped coil. The arrangement of the plurality of magnetic members can also generate a larger magnetic force, and the driving action for the first lens group 12 can be more easily realized to rapidly drive the first lens group 12 to move relative to the base 11.

Alternatively, the magnetic member is a magnet, and the lens assembly may further include a magnet holder 133, and the magnet may be adhered to the magnet holder 133 to ensure the mounting stability of the magnet.

Referring to fig. 2 in detail, the base 11 includes a supporting plate 111 and at least two limiting members 112, the at least two limiting members 112 are disposed on an outer peripheral wall of the supporting plate 111 and protrude toward the first lens group 122, an accommodating space is defined between the at least two limiting members 112, the accommodating space is used for accommodating the accommodating spaces of the first driving member 131, the second driving member 132, the first lens group 12 and the elastic member 16, wherein the second spring 162 is fixed on the supporting plate 111. In addition, the middle of the carrier plate 111 is provided with a light hole, so that light can pass through the light hole and enter the photosensitive chip. The limiting member 112 is convexly disposed on the bearing plate 111, and is formed with an accommodating space, the second spring 162 is fixed on the bearing plate 111, the bearing plate 111 can support the first driving member 131, the second driving member 132, the first lens group 12 and the elastic member 16 accommodated in the accommodating space, and the limiting member 112 can accommodate and fix the first driving member 131, the second driving member 132, the first lens group 12 and the elastic member 16, and can also play a certain guiding role for the movement of the first lens group 12, thereby preventing the movement track of the first lens group 12 from deviating, and ensuring accurate focusing.

Optionally, the at least two stoppers 112 may be uniformly distributed around the carrier plate 111, or may not be uniformly distributed. As shown in fig. 3, the number of the limiting members 112 is three, the three limiting members 112 are uniformly disposed on the outer peripheral wall of the carrier plate 111 and form an accommodating space by enclosure, and then the limiting members 112 can also surround and fix the device accommodated in the accommodating space.

Further, a first locking groove 1211 is disposed on an outer side wall of the first lens holder 121, a second locking groove 1121 is disposed on an inner side wall of the limiting member 112, a first protruding portion 1611 is disposed on an inner peripheral edge of the first spring 161, the first protruding portion 1611 is in limited fit with the first locking groove 1211, a second protruding portion 1621 is disposed on an outer peripheral edge of the second spring 162, and the second protruding portion 1621 is in limited fit with the second locking groove 1121. Referring to fig. 3, the first spring 161 and the second spring 162 are both ring-shaped, and the first spring 161 is located in the second spring 162. The inner circumference of the first spring plate 161 is provided with a plurality of first protruding portions 1611 protruding inwards, the plurality of first protruding portions 1611 are connected with the plurality of first locking grooves 1211 on the first lens holder 121 in a one-to-one matching manner, and the first protruding portions 1611 are locked in the first locking grooves 1211, so that the first spring plate 161 is fixed and limited, and the first spring plate 161 and the first lens holder 121 are prevented from rotating relatively. The outer periphery of the second spring plate 162 is provided with a plurality of second protrusions 1621 protruding outwards, the plurality of second protrusions 1621 are connected with the plurality of second clamping grooves 1121 on the limiting member 112 in a one-to-one fit manner, and the second protrusions 1621 are clamped in the second clamping grooves 1121, so that the second spring plate 162 is fixed and limited, and relative rotation between the second spring plate 162 and the base 11 is prevented.

Referring to fig. 5, fig. 5 is an assembly schematic diagram of a lens assembly according to an embodiment of the present disclosure. As shown in fig. 5, first, the first lens group 12 is fixedly connected to the magnet holder 133, for example, the magnet holder 133 is adhered to the outer side of the first lens 13, so as to obtain the structure 1 in the figure; then, a second driving member 132 (e.g., a magnet) is bonded to the outer side wall of the magnet fixing frame 133, so as to obtain the structure member 2 in the figure; further, fixedly connecting the elastic member 16 with the structural member 2 to obtain the structural member 3 in the figure; fixing the structural element 3 to the base 11, for example by gluing the elastic element 16 to the base 11, so as to obtain the structural element 4 in the figure; further, the first driving member 131 (e.g. a coil) is fixed on the base 11 and is accommodated between the second driving member 132 and the limiting member of the base 11, so as to obtain the structural member 5 in the drawing; finally, the flexible circuit board 16 mounted with the displacement sensor is connected to the first driving member 131 to supply power to the first driving member 131, so that the lens assembly described in the embodiment of the present application is obtained.

The embodiment of the application also provides a camera module.

Referring to fig. 7 to 8, the camera module includes a lens barrel 300, a photosensitive chip 400 and the lens assembly as described in the above embodiments, and the photosensitive chip 400 and the lens assembly are disposed in the lens barrel 300.

It is understood that the lens assembly is located above the light sensing chip 400, and the lens assembly includes the first lens group 12, and light can pass through the first lens group 12 and be incident on the light sensing chip 400, so that the light sensing chip 400 can perform an imaging function and output. The imaging principle of the camera module may refer to the description in the related art, and this embodiment is not described in detail herein.

In the embodiment of the present application, the camera module includes all technical features of the lens assembly in the above embodiments, and then the technical effect same as that of the lens assembly can be at least achieved, and in order to avoid repetition, this embodiment is not repeated.

In this embodiment, the lens assembly is the first lens assembly 100, the camera module further includes a second lens assembly 200 and a second driving mechanism 201, the second lens assembly 200 is connected to the lens barrel 300, and the second lens assembly 200 is located on a side of the first lens assembly 100 that faces away from the photosensitive chip 400; the second driving mechanism 201 is used for driving the second lens assembly 200 to extend away from the first lens assembly 100 or retract towards the first lens assembly 100.

The second driving mechanism 201 may be connected to the flexible circuit board of the first lens assembly 100, so as to control the first driving mechanism and the second driving mechanism 201 in the camera module through one flexible circuit board; alternatively, the second driving mechanism 201 may be connected to a main board of the electronic device, or the like.

Alternatively, the second driving mechanism 201 may include a motor and a transmission shaft, the transmission shaft is connected to the second lens assembly 200 in a threaded manner, and forward rotation or reverse rotation of the motor can drive the transmission shaft to rotate forward or reverse, so that the second lens assembly 200 can be driven to extend in a direction away from the first lens assembly 100 or retract in a direction close to the first lens assembly 100. Furthermore, the camera module can not only adjust the distance between the first lens group 12 in the first lens assembly 100 and the photosensitive chip 400, but also adjust the distance between the second lens assembly 200 and the first lens assembly 100, so as to better realize the function of optical zooming, and obtain an image with higher imaging definition.

The second lens assembly 200 includes a second lens group 22 and a second lens holder 21 for supporting the second lens group 22, a movable member (not shown) is disposed in the lens barrel 300, the second lens holder 21 is provided with a transmission member (not shown) adapted to the movable member, the second driving mechanism 201 is connected to the movable member for driving the movable member to move, and the movable member drives the transmission member to move in a first direction or a second direction, so that the second lens holder 21 extends in a direction away from the first lens assembly 100 or retracts in a direction close to the first lens assembly 100; wherein the first direction is opposite to the second direction.

Alternatively, the second driving mechanism 201 may be a motor, the movable element may be a cam groove track structure element disposed in the lens barrel 300, the motor may be connected to the cam groove track structure element through a gear pair, and the transmission element is a cam slider disposed on the second lens holder 21 and adapted to the cam groove track structure element; the positive rotation or the reverse rotation of the motor can drive the cam groove track structure to positive rotation or reverse rotation through the gear pair, so as to make the cam slider rise or fall, and then the second lens support 21 can be pushed to drive the second lens group 22 to extend in the direction far away from the first lens group 12, or to retract in the direction close to the first lens group 12, so as to achieve the purpose of adjusting the distance between the second lens group and the first lens group 12.

The cam groove track structure may include a cylindrical column and a groove track disposed on the column, the groove track is connected end to end, the groove track extends along the axial direction of the column, and the cam slider on the second lens holder 21 is accommodated in the groove track and can slide in the groove track. The motor can drive the cylinder to rotate, when the cylinder does not move up or down, the rotation of the cylinder also enables the cam slider accommodated in the groove track to move, and the cam slider also can move up or down along with the rotation of the cylinder, so as to drive the second lens holder 21 and the second lens group 22 to move up or down. With this arrangement, the distance between the second lens assembly 200 and the first lens assembly 100 can be adjusted, and the optical zoom function can be achieved.

Further, the second lens group 22 includes a first lens group 221 and a second lens group 222, the first lens group 221 is located between the second lens group 222 and the first lens assembly 100, the second lens holder 21 includes a first lens holder 211 for holding the first lens group 221 and a second lens holder 212 for holding the second lens group 222, the transmission members include a first transmission member (not shown) and a second transmission member (not shown) disposed on the first lens holder 211, and a third transmission member (not shown) disposed on the second lens holder 212, the first transmission member is adapted to the movable member, and the second transmission member is adapted to the third transmission member; when the movable element drives the first transmission element to move in the first direction, the primary lens holder 211 extends in a direction away from the first lens assembly 100, and the extending movement of the primary lens holder 211 is used for driving the third transmission element to move through the second transmission element, so that the secondary lens holder 212 extends in a direction away from the primary lens holder 211; when the movable element drives the first transmission element to move towards the second direction, the first-stage lens holder 211 retracts towards the direction close to the first lens assembly 100, and the retraction movement of the first-stage lens holder 211 is used for driving the third transmission element to move through the second transmission element, so that the second-stage lens holder 212 retracts towards the direction close to the first-stage lens holder 211.

Optionally, the movable member includes a cylinder body disposed in the lens barrel 300 and a first groove track on the cylinder body, the first lens holder 211 is a tubular structure, the first transmission member is a first cam slider disposed on an outer side wall of the first lens holder 211, the first cam slider is accommodated in the first groove track in the lens barrel 300, the second transmission member is a second groove track disposed on an inner side wall of the first lens holder 211, the third transmission member is a second cam slider disposed on an outer side wall of the second lens holder 212, and the second cam slider is accommodated in the second groove track. When the second driving mechanism 201 drives the cylinder to rotate, for example, the cylinder rotates forward, so that the first cam slider rotates and rises, and further drives the first-stage lens holder 211 and the first-stage lens group 221 to rotate and rise, so that the distance between the first-stage lens group 221 and the first lens assembly 100 is increased, and the rotation of the first-stage lens holder 211 drives the second cam slider adapted to the first cam slider to rotate and rise, and further drives the second-stage lens holder 212 and the second-stage lens group 222 to rotate and rise, so that the distance between the second-stage lens group 222 and the first-stage lens group 221 is increased; when the second driving mechanism 201 drives the cylinder to rotate reversely, the first cam slider is driven to rotate and descend, and then the first lens bracket 211 and the first lens group 221 are driven to rotate and descend, so that the distance between the first lens group 221 and the first lens group 12 is reduced, and the rotation of the first lens bracket 211 drives the second cam slider which is in adaptive connection with the first cam slider to rotate and descend, and then the second lens bracket 212 and the second lens group 222 are driven to rotate and descend, so that the distance between the second lens group 222 and the first lens group 221 is reduced. Through the arrangement, the purpose of adjusting the distance between the lens groups can be achieved, and optical zooming can be better realized.

It should be noted that, the first transmission element, the second transmission element, and the third transmission element may also be in other structural forms capable of implementing the telescopic motion, for example, the telescopic motion may be implemented by referring to the design of the coil and the magnetic element in the above lens assembly embodiment, or the telescopic motion may also be implemented by using the design of the worm and gear, and the like, which is not specifically limited and described in this application embodiment.

Optionally, the camera module further includes a third lens assembly 500 disposed between the photosensitive chip 400 and the first lens assembly 100, where the third lens assembly 500 includes a third lens group 511 and a third lens holder 512 for holding the third lens group 511, and the third lens assembly 500 does not move relative to the photosensitive chip 400, that is, the distance between the third lens group 511 and the photosensitive chip 400 does not change.

In an alternative embodiment, the third lens group 511 may be a filter. The camera module further includes a window lens 60 disposed at an outermost end of the light incident side, for example, the window lens 60 is disposed at a side of the second-stage lens group 222, which is back to the first-stage lens group 221, for playing roles of preventing water and dust and protecting the lens group.

The embodiment of the application also provides electronic equipment, and the electronic equipment comprises the camera module in the embodiment. It should be noted that the electronic device includes all the technical features of the camera module in the above embodiments, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here.

Optionally, the electronic device includes, but is not limited to, an electronic product such as a mobile phone, a tablet computer, a smart wearable device, and the like.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A lens assembly, comprising: the lens group comprises a base, a first lens group, a first driving mechanism, a displacement sensor, a control chip and a flexible circuit board, wherein the first lens group is arranged in the base and movably connected with the base, the first driving mechanism is electrically connected with the first lens group through the flexible circuit board and drives the first lens group to extend in a direction away from the base or retract in a direction close to the base, the displacement sensor is connected with the control chip and is connected with the first driving mechanism, and the displacement sensor is used for detecting the displacement of the first lens group relative to the base;

2. The lens assembly of claim 1, wherein the first driving mechanism comprises a first driving member and a second driving member, the first driving member is connected with the flexible circuit board, and the second driving member is connected with the first lens group;

the control chip is used for controlling the first driving piece to be in a working state according to the displacement, the first driving piece drives the second driving piece to move, and the second driving piece drives the first lens group to extend out in a direction away from the base or retract in a direction close to the base.

3. The lens assembly as claimed in claim 2, wherein one of the first driving member and the second driving member is a coil and the other is a magnetic member, and the displacement sensor is configured to detect a magnitude of magnetic flux between the first driving member and the second driving member to determine a displacement amount of the first lens group relative to the base.

4. The lens assembly of claim 2, further comprising a resilient member having one end connected to the base and the other end connected to the first lens group.

5. The lens assembly of claim 4, wherein the first lens group comprises a first lens group and a first lens holder for holding the first lens group, the resilient member comprises a first spring and a second spring, the first spring is elastically connected to the first lens holder, the second spring is connected to the base, and the second spring is sleeved outside the first spring.

6. The lens assembly of claim 5, wherein the first driving member is a coil fixed on the base, the second driving member includes at least two magnetic members, the at least two magnetic members are spaced apart from each other on an outer sidewall of the first lens holder, and the at least two magnetic members surround to form a ring structure.

7. The lens assembly of claim 5, wherein the base comprises a supporting plate and at least two limiting members, the at least two limiting members are disposed on an outer peripheral wall of the supporting plate and protrude toward the first lens group, a receiving space is defined between the at least two limiting members, the receiving space is configured to receive the first driving member, the second driving member, the first lens group and the elastic member, and the second spring is fixed on the supporting plate.

8. The lens assembly of claim 7, wherein a first engaging groove is formed on an outer sidewall of the first lens holder, a second engaging groove is formed on an inner sidewall of the retaining member, a first protrusion is formed on an inner peripheral edge of the first spring, the first protrusion is engaged with the first engaging groove in a limiting manner, and a second protrusion is formed on an outer peripheral edge of the second spring, the second protrusion is engaged with the second engaging groove in a limiting manner.

9. A camera module, comprising a lens barrel, a photosensitive chip and the lens assembly according to any one of claims 1 to 8, wherein the photosensitive chip and the lens assembly are disposed in the lens barrel.

10. The camera module according to claim 9, wherein the lens assembly is a first lens assembly, the camera module further comprises a second lens assembly and a second driving mechanism, the second lens assembly is connected to the lens barrel, and the second lens assembly is located on a side of the first lens assembly facing away from the photosensitive chip;

the second driving mechanism is used for driving the second lens assembly to extend away from the first lens assembly or retract towards the first lens assembly.

11. The camera module according to claim 10, wherein the second lens assembly includes a second lens group and a second lens holder for supporting the second lens group, a movable member is disposed in the lens barrel, the second lens holder has a transmission member adapted to the movable member, the second driving mechanism is connected to the movable member for driving the movable member to move, and the movable member drives the transmission member to move in a first direction or a second direction, so that the second lens holder extends in a direction away from the first lens assembly or retracts in a direction close to the first lens assembly; wherein the first direction is opposite to the second direction.

12. The camera module of claim 11, wherein the second lens group comprises a primary lens group and a secondary lens group, the primary lens group is located between the secondary lens group and the first lens assembly, the second lens holder comprises a primary lens holder for holding the primary lens group and a secondary lens holder for holding the secondary lens group, the transmission members comprise a first transmission member and a second transmission member disposed on the primary lens holder and a third transmission member disposed on the secondary lens holder, the first transmission member is adapted to the movable member, and the second transmission member is adapted to the third transmission member;

when the movable piece drives the first transmission piece to move towards the first direction, the primary lens support extends towards the direction far away from the first lens component, and the extension movement of the primary lens support is used for driving the third transmission piece to move through the second transmission piece so as to enable the secondary lens support to extend towards the direction far away from the primary lens support; when the moving part drives the first transmission part to move towards the second direction, the first-stage lens support retracts towards the direction close to the first lens component, and the retraction movement of the first-stage lens support is used for driving the third transmission part to move through the second transmission part, so that the second-stage lens support retracts towards the direction close to the first-stage lens support.

13. An electronic device, characterized in that the electronic device comprises a camera module according to any of claims 9-12.