CN112748508A

CN112748508A - Lens driving device, imaging device, and electronic apparatus

Info

Publication number: CN112748508A
Application number: CN202110076204.3A
Authority: CN
Inventors: 吴云昆
Original assignee: Nanchang OFilm Optoelectronics Technology Co Ltd
Current assignee: Nanchang OFilm Optoelectronics Technology Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-05-04
Anticipated expiration: 2041-01-20
Also published as: CN112748508B

Abstract

The application provides a camera lens drive arrangement, camera device and electronic equipment, camera lens drive arrangement is used for driving two camera lenses to remove, includes: a housing; the two bearing seats are respectively and movably connected in the shell, one lens is arranged in each bearing seat, the two bearing seats are oppositely arranged, and the optical axes of the two lenses are overlapped; and each bearing seat is connected with at least one driving piece, one end of each driving piece is connected with the bearing seat, the other end of each driving piece is connected with the shell, each driving piece comprises an electrostrictive element, and the driving pieces stretch and drive the two bearing seats and the lenses in the bearing seats to mutually approach or separate after being electrified. Compared with the existing voice coil motor which drives the lens through magnetic force, the lens driving device, the camera device and the electronic equipment avoid magnetic interference generated by magnetic force.

Description

Lens driving device, imaging device, and electronic apparatus

Technical Field

The present disclosure relates to imaging or camera technologies, and in particular, to a lens driving device, a camera device, and an electronic apparatus.

Background

In an auto-focus (AF) camera module, focusing is achieved by driving lenses to move to change the distance between the lenses.

In a conventional auto-focus camera module, a lens is generally driven to move by magnetic force. For example, a commonly used voice coil motor structure converts electric energy into mechanical energy to drive a lens to move by using the principle that an electrified coil is acted by force in a magnetic field.

In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: an antimagnetic structure is required to be added in the automatic focusing camera module with the magnetic driving lens to prevent magnetic leakage, so that the miniaturization of the automatic focusing camera module is not facilitated. In addition, one voice coil motor can only drive one lens, and if a plurality of lenses need to be driven, a plurality of voice coil motors are needed, but the plurality of voice coil motors cause magnetic interference among the motors, and the driving precision is affected.

Disclosure of Invention

In view of the above, it is necessary to provide a lens driving device, an image pickup device and an electronic apparatus to solve the above problems.

An embodiment of the present application provides a lens driving device, configured to drive two lenses to move, including: a housing; the two bearing seats are respectively and movably connected in the shell, one lens is arranged in each bearing seat, the two bearing seats are oppositely arranged, and the optical axes of the two lenses are overlapped; and each bearing seat is connected with at least one driving piece, one end of each driving piece is connected with the bearing seat, the other end of each driving piece is connected with the shell, each driving piece comprises an electrostrictive element, and the driving pieces stretch and drive the two bearing seats and the lenses in the bearing seats to mutually approach or separate after being electrified.

The lens driving device utilizes the characteristic that the length of the electrostrictive element can change after being electrified, and leads the driving piece to stretch and retract in different degrees by leading currents with different sizes into the driving piece so as to drive the two bearing seats and the lenses in the bearing seats to mutually approach or keep away from each other, thereby realizing the zooming function of an optical system consisting of the two lenses. Compare with the voice coil motor through magnetic force drive camera lens now, avoided because magnetic force that magnetic force produced disturbs to compare with the voice coil motor that current structure is complicated, the driving piece drive that makes through electrostriction element bears the structure of seat simpler, is convenient for realize camera lens drive arrangement's miniaturization. And compared with a magnetic driving mode, the driving mode of the driving part made of the electrostriction element is higher in driving precision, so that the zooming precision of an optical system consisting of the two lenses is improved.

In some embodiments, at least one set of connecting pins is disposed on the periphery of each of the bearing seats and the inner structure of the housing, the two ends of the driving member are respectively provided with a connecting member, the connecting member is provided with a locking slot, and the driving member is locked to the corresponding connecting pin through the locking slot of the connecting member.

So, compare with current welding or screw-on's connected mode, through the connecting pin with it is more convenient that the connecting piece cooperation card is held fixedly to be convenient for change when maintaining the driving piece.

In some embodiments, the housing has two elastic members, one of the elastic members is fixed to one side of the housing, the other of the elastic members is fixed to the other side of the housing, the two elastic members are respectively connected to the two bearing seats, the driving member is restored to the length before expansion after power failure, and the elastic members drive the two bearing seats and the lens in the bearing seats to return to the original position.

Therefore, the driving piece controls the bearing seat and the lens in the bearing seat to move mutually, the elastic piece controls the bearing seat and the lens in the bearing seat to return to the original position, and the elastic piece is matched with the driving piece to balance the tension provided by the driving piece and the restoring force provided by the elastic piece on the bearing seat so as to position the two bearing seats and the lens in the bearing seat and realize the zooming function of an optical system consisting of the two lenses.

In some embodiments, the elastic member includes an inner fixing portion, an outer fixing portion, and an elastic portion, the inner fixing portion and the outer fixing portion are connected by the elastic portion, the inner fixing portion is connected to the carrier seat, and the outer fixing portion is connected to the housing.

Thus, the inner fixing part is used for connecting the bearing seat, the outer fixing part is used for connecting the shell, when the bearing seat is stressed to move, the inner fixing part is driven to be far away from the outer fixing part, and at the moment, the elastic part is in a stretching state; when the bearing seat is not stressed, the elastic part stretches and retracts to drive the inner fixing part to move towards the outer fixing part, so that the bearing seat is reset.

In some embodiments, the resilient member is a one-piece structure or a split structure.

Thus, the elastic piece of the integrated structure or the split structure is selected according to the structure of the shell, so that the elastic piece is conveniently connected with the shell.

In some embodiments, the lens driving apparatus further includes a circuit board, and a circuit connector electrically connected to the circuit board, the circuit connector being electrically connected to an external power supply, the circuit board being electrically connected to the driving member and controlling the magnitude of the current in the driving member.

Therefore, the circuit board enables the driving piece to stretch or extend in different degrees by introducing currents of different sizes into the driving piece, and drives the two bearing seats and the lenses in the bearing seats to be close to or far away from each other.

In some embodiments, the lens driving device further includes a plurality of electrical connection portions electrically connected to the circuit board and respectively disposed on the internal structure of the housing, and one end of each driving member away from the bearing seat is electrically connected to the corresponding electrical connection portion.

Therefore, the plurality of electric connection parts are respectively arranged on the internal structure of the shell, so that the driving piece is connected to the internal structure of the shell and is also electrically connected to the electric connection parts.

In some embodiments, the housing further includes two limiting members disposed opposite to each other, the two limiting members are slidably connected to the two bearing seats respectively, each of the bearing seats has a protruding abutting portion on a peripheral side thereof, and the limiting members cooperate with the abutting portions to limit a sliding distance of the bearing seats.

Therefore, the limiting part is used for improving the sliding stability of the bearing seat, and the abutting part of the bearing seat is used for abutting against the limiting part and limiting the sliding distance of the bearing seat.

The embodiment of the application provides a camera device, which comprises a lens and the lens driving device, wherein the lens is arranged in a bearing seat.

The camera device has the advantages of no magnetic interference and high zooming precision. On one hand, the lens driving device enables the driving piece to stretch out and draw back in different degrees by introducing currents with different magnitudes into the driving piece, and drives the two bearing seats and the lenses in the bearing seats to mutually approach or keep away from each other, so that magnetic interference generated by magnetic force is avoided. On the other hand, compared with a magnetic driving mode, the driving mode of the driving piece made of the electrostriction element has higher driving precision, and further improves the zooming precision of the camera device.

In some embodiments, the image pickup apparatus further includes a prism disposed in the lens object side direction.

Therefore, the prism changes the shooting direction of the camera device, so that the camera device is flexibly installed in the equipment, the thickness of the equipment is reduced, and the equipment is miniaturized.

An embodiment of the present application provides an electronic device, including protective housing and foretell camera device, camera device install in the protective housing.

The electronic equipment has the advantages of no magnetic interference and high zooming precision. On one hand, the lens driving device enables the driving piece to stretch out and draw back in different degrees by introducing currents with different magnitudes into the driving piece, and drives the two bearing seats and the lenses in the bearing seats to mutually approach or keep away from each other, so that magnetic interference generated by magnetic force is avoided. On the other hand, the driving mode of the driving piece made of the electrostriction element is higher in driving precision compared with the magnetic driving mode, and therefore the precision of zooming of the image pickup device and the electronic equipment is improved.

Drawings

Fig. 1 is a schematic structural diagram of a lens driving apparatus according to an embodiment of the present application.

Fig. 2 is an exploded view of a lens driving apparatus according to an embodiment of the present disclosure.

Fig. 3 is a schematic view of an integrated structure of an elastic member in a lens driving device according to an embodiment of the present application.

Fig. 4 is a schematic view of a split structure of an elastic member in a lens driving apparatus according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a carrier in a lens driving device according to a first embodiment of the present application.

Fig. 6 is a schematic view of a connection structure between one of the bearing seats and the housing in the lens driving device according to the second embodiment of the present application.

Fig. 7 is a schematic view of a connection structure between another carrier and a housing in a lens driving device according to an embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of a driving member in a lens driving apparatus according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of an image pickup apparatus according to an embodiment of the present application.

Fig. 10 is a schematic structural diagram of an electronic device in an embodiment of the present application.

Description of the main elements

Lens driving device 100

Housing 10

Fixing frame 12

Light-passing hole 122

Side panel 14

Position limiting member 16

Chute 162

Elastic member 18

Inner fixing part 182

Outer fixing part 184

Elastic part 186

Bearing seat 20

Mounting groove 22

Connecting pin 24

Abutting part 26

Avoidance groove 262

Driving member 30

Connecting piece 32

Circuit board 42

Circuit connector 44

Flexible circuit board 46

Prism 50

Protective housing 60

Image pickup device 200

Electronic device 300

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit 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.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, a lens driving apparatus 100 according to an embodiment of the present disclosure is used for driving two lenses to move, so that an optical system formed by the two lenses realizes a zoom function.

The lens driving device 100 includes a housing 10, two carrying seats 20 and a plurality of driving members 30. The two carrying seats 20 are movably connected in the housing 10, a lens is installed in each carrying seat 20, and the two carrying seats 20 are oppositely disposed so that the optical axes of the lenses in the two carrying seats 20 are overlapped. Each carrying seat 20 is connected to at least one driving member 30, and one end of each driving member 30 is connected to the carrying seat 20, and the other end is connected to the internal structure of the housing 10 opposite to the carrying seat 20. The driving member 30 is made of an electrostrictive element, and the driving member 30 stretches after being powered on and drives the two bearing seats 20 and the lenses in the bearing seats 20 to approach or separate from each other, so as to realize the zooming function of the optical system formed by the two lenses.

In the lens driving device 100 according to the embodiment of the present application, by utilizing the characteristic that the length of the electrostrictive element changes after being powered on, the driving member 30 is powered on to extend and retract the driving member 30, so as to drive the two bearing seats 20 and the lenses in the bearing seats 20 to approach or separate from each other, thereby implementing the zoom function of the optical system formed by the two lenses. Compared with the existing voice coil motor which drives the lens through magnetic force, the magnetic interference generated by the magnetic force is avoided. Compared with the existing voice coil motor with a complicated structure, the structure of driving the bearing seat 20 by the driving member 30 made of the electrostrictive element is simpler, and the miniaturization of the lens driving device 100 is facilitated.

Some embodiments of the present application will now be described with continued reference to the accompanying drawings.

Referring to fig. 2, the housing 10 has two opposite fixing frames 12 and side plates 14 connected to the fixing frames 12. The side plates 14 enclose a cavity for accommodating the bearing seat 20 and the driving member 30. Each fixed frame 12 is provided with a light through hole 122, the light through holes 122 of the two fixed frames 12 are arranged oppositely and are arranged along the optical axis direction of the lens installed in the shell 10 so as to avoid blocking the lens, and further, the zooming function of the optical system formed by the two lenses is realized. In some embodiments, one of the side plates is removably mounted to the housing 10 for ease of maintenance.

In some embodiments, the fixing frame 12 and the side plates 14 are rectangular, and correspondingly, the housing 10 is rectangular to make the housing 10 regular, so that the housing 10 can be conveniently installed in an electronic device to which the housing is applied. It is understood that in other embodiments, the fixing frame 12 has other shapes such as a circle or a polygon, or an irregular shape, so as to facilitate the housing 10 to be installed with different electronic devices.

Two opposite locating elements 16 are also provided in the housing 10. The two limiting members 16 are respectively slidably connected to the two bearing bases 20 to improve the stability of the bearing bases 20 during relative movement. Specifically, the limiting member 16 is provided with a sliding slot 162 adapted to the outer wall of the bearing seat 20, and the two bearing seats 20 are respectively slidably connected to the sliding slot 162 of the corresponding limiting member 16, so as to improve the stability of the bearing seats 20 during relative movement. In some embodiments, the stop 16 is secured to the side plate 14.

The internal structure of the housing 10 includes a fixed frame 12, a side plate 14 and a limiting member 16, wherein one end of each driving member 30 is connected to the carrying seat 20, and the other end thereof can be connected to the fixed frame 12 or the side plate 14 or the limiting member 16 opposite to the carrying seat 20, so that the driving member 30 can extend and contract after being powered on and drive the two carrying seats 20 and the lenses in the carrying seats 20 to approach or separate from each other. In some embodiments, one of the carriage bases 20 is connected to the fixed frame 12 through a corresponding driving member 30, and the other carriage base 20 is connected to the limiting member 16 through a corresponding driving member 30, so that the driving members 30 of different carriage bases 20 are separated and spaced apart from each other in the housing 10.

Referring to fig. 2, in some embodiments, the housing 10 further includes two elastic members 18. The elastic members 18 are respectively fixed at two ends of the housing 10, each elastic member 18 is connected to one of the bearing seats 20, the driving member 30 is restored to the length before expansion after power failure, and the elastic members drive the two bearing seats 20 and the lenses in the bearing seats 20 to approach or separate from each other, so as to realize the zooming function of the optical system formed by the two lenses.

In some embodiments, the elastic members 18 are fixed to the fixing frame 12, respectively. Each elastic member 18 includes an inner fixing portion 182, an outer fixing portion 184 and an elastic portion 186. The inner fixing portion 182 and the outer fixing portion 184 are connected by the elastic portion 186, and the inner fixing portion 182 is located inside the outer fixing portion 184. The inner fixing portion 182 is used for connecting the carrier 20, and the outer fixing portion 184 is used for connecting the fixing frame 12. When the carrier 20 is moved by the driving force of the driving member 30, the inner fixing portion 182 is driven to be away from the outer fixing portion 184, and the elastic portion 186 is in a stretching state; when the driving force of the driving member 30 disappears, the elastic portion 186 stretches and retracts to drive the inner fixing portion 182 to move toward the outer fixing portion 184, so that the carrier 20 is reset. The inner fixing portion 182 has an opening corresponding to the lens in the carrying seat 20 for avoiding shielding the lens.

Referring to fig. 3, in some embodiments, the elastic element 18 is an integrated structure, the inner fixing portion 182 and the outer fixing portion 184 are sheet-shaped, and the elastic portion 186 is bent in a serpentine shape, and accordingly, the inner fixing portion 182, the outer fixing portion 184 and the elastic portion 186 are substantially on the same plane, so as to reduce the volume of the elastic portion 186, and miniaturize the lens driving device 100.

Referring to fig. 4, the elastic member 18 is a split structure, and the elastic member 18 is an integral structure or a split structure according to the structure of the housing 10, so that the elastic member 18 is connected to the housing 10.

Referring to fig. 5, in some embodiments, the bearing seat 20 is a rectangular parallelepiped, and four corners of the bearing seat 20 are chamfered to prevent the bearing seat 20 from scratching the housing 10. The bearing seat 20 is provided with a mounting groove 22 therein, and the mounting groove 22 is used for mounting a lens. It will be appreciated that in other embodiments, the mounting groove 22 is used to mount a lens or lens set.

At least one set of connecting pins 24 is disposed on the peripheral side of each bearing seat 20 and the inner structure of the housing 10, and two ends of the driving member 30 are respectively connected to the corresponding connecting pins 24. Compared with the existing connection mode of welding or screw fastening, the driving piece 30 is more convenient to replace during maintenance by matching and clamping the connecting pin 24 and the connecting piece 32.

Referring to fig. 6, two sets of connecting pins 24 are disposed on the periphery of one of the bearing seats 20 and the limiting member 16, and each set of connecting pins 24 is connected to each other by the driving member 30; referring to fig. 7, two sets of connecting pins 24 are disposed on the periphery of the other carrier 20 and the fixed frame 12, and each set of connecting pins 24 is connected to each other by a driving member 30. The driving members 30 corresponding to different load-bearing seats 20 are separated and spaced apart from each other in the housing 10.

In some embodiments, each of the bearing seats 20 has two connecting pins 24 disposed opposite to each other on the periphery, and the connecting pins 24 are used for connecting one end of the driving member 30. The two driving members 30 disposed oppositely drive the bearing seat 20 to move, so that the bearing seat 20 is stressed uniformly, and the moving stability of the bearing seat 20 is improved.

In some embodiments, the extending direction of the straight line of the two connecting pins 24 on one of the carrier 20 is taken as a first direction, and the extending direction of the straight line of the two connecting pins 24 on the other carrier 20 is taken as a second direction. The first direction is perpendicular to the second direction, so that the driving members 30 corresponding to different load-bearing seats 20 are separated and arranged in the housing 10 at intervals.

Each of the supporting bases 20 has a supporting portion 26, and the supporting portion 26 is protruded around the supporting base 20. Each bearing seat 20 is slidably connected to the sliding slot 162 of the corresponding limiting member 16, and the abutting portion 26 is used for abutting against the corresponding limiting member 16 to limit the sliding distance of the sliding slot 162. The holding portion 26 is provided with an escape groove 262 for passing through the driving member 30. In some embodiments, the retaining portion 26 extends outward along the circumference of the carrier 20 to form a similar contour as the carrier 20.

Referring to fig. 8, the driving member 30 is linear to reduce the volume and weight of the driving member 30, so as to miniaturize the lens driving device 100 and reduce the power consumption for driving the carrying seat 20. The driving member 30 has two ends respectively provided with a connecting member 32, the connecting member 32 has a locking groove, and the driving member 30 is locked to the corresponding connecting pin 24 through the locking groove of the connecting member. Specifically, one of the connecting members 32 is clamped to the connecting pin 24 of the carrier 20 through a clamping slot, and the other connecting member 32 is clamped to the connecting pin 24 of the fixing frame 12 or the limiting member 16 through a clamping slot. The mating connection with the connector pin 24 by the preformed connector 32 is more convenient than prior art welding or screw fastening connections and facilitates replacement of the driver 30 for maintenance. It will be appreciated that in other embodiments, the drive member 30 is elongate.

The driving member 30 is made of an electrostrictive element, and the driving member 30 is made to expand and contract to different degrees by applying currents of different magnitudes to the driving member 30, and drives the two load bearing seats 20 to move close to or away from each other. The driving method of the driving member 30 made of the electrostrictive element is higher in driving precision than the magnetic driving method, and the electrostrictive element in the present application refers to a special metal material which can recover the original macroscopic shape in another temperature range after being subjected to plastic deformation in a certain temperature range. In some embodiments, the electrostrictive element is elongated at room temperature, and when the electrostrictive element is heated to a certain temperature, the electrostrictive element returns to its original shape, i.e., a natural length; when the temperature is lowered to room temperature, the electrostrictive element returns to the shape at room temperature, i.e., an elongated state. By applying currents of different magnitudes to the driving member 30, the electrostrictive element generates heat after being electrified due to internal resistance of the electrostrictive element, so that the electrostrictive element is stretched in different degrees, and the two bearing seats 20 are driven to approach or move away from each other; when the driven member 30 is de-energized, the electrostrictive element recovers its pre-flexed length.

The electrostrictive element is made of a Ti-Ni alloy, a copper-based shape memory alloy (e.g., a Cu-Zn-Al alloy, a Cu-Zn-Ca alloy, a Cu-Al-Ni alloy, a Cu-Al-Be alloy, a Cu-Al-Mu alloy, a Cu-Zn-Si alloy, a Cu-Al-Te alloy, etc.), or an iron-based shape memory alloy (e.g., a Fe-Pt alloy, a Fe-Pd alloy, a Fe-Cr-Ni alloy, a Fe-Ni-C alloy, a Fe-M alloy, a Fe33Ni-10Co-4Ti alloy, a Fe182Mn-6Si alloy, a Fe28Mn-6Si-5Cr alloy, a Fe-Cr-Ni-Co-Mn-Si alloy, a Fe-Cr-Ni-Mn-Si alloy, etc.).

Referring to fig. 1, the lens driving apparatus 100 further includes a circuit board 42, and a circuit connector 44 and a plurality of electrical connection portions (not shown) electrically connected to the circuit board 42, respectively. The plurality of electrical connection parts are respectively arranged on the internal structure of the housing 10, one end of each driving member 30 away from the carrier 20 is electrically connected to the corresponding electrical connection part, the circuit connector 44 is electrically connected to an external power supply device, and the circuit board 42 controls the magnitude of the current applied to the corresponding driving member 30 through the electrical connection part.

The circuit board 42 passes through the electrical connection portion to supply different currents to the driving member 30, so that the driving member 30 expands and contracts to different degrees, and drives the two carrying seats 20 and the lenses in the carrying seats 20 to approach or separate from each other. When the circuit board 42 stops energizing the driving member 30, the driving member 30 returns to the length before expansion, and the elastic member 18 drives the two carrying seats 20 and the lens in the carrying seat 20 to return to the original position.

In some embodiments, a plurality of electrical connection portions are respectively disposed at the connection positions of the driving member 30 and the internal structure of the housing 10, so that the driving member 30 is electrically connected to the electrical connection portions while being connected to the internal structure of the housing 10.

In some embodiments, the circuit board 42 and the circuit connector 44 are connected by a flexible circuit board 46, so as to adjust the position of the circuit connector 44 to be electrically connected to the external power supply.

In the lens driving device 100 of the embodiment of the application, each carrying seat 20 is connected to at least one driving element 30, one end of each driving element 30 is connected to the carrying seat 20, and the other end is connected to the internal structure of the housing 10 opposite to the carrying seat 20. The circuit board 42 passes through the electrical connection portion to supply different currents to the driving member 30, so that the driving member 30 expands and contracts to different degrees, and drives the two carrying seats 20 and the lenses in the carrying seats 20 to approach or separate from each other. When the circuit board 42 stops energizing the driving member 30, the driving member 30 returns to the length before expansion, and the elastic member 18 drives the two carrying seats 20 and the lens in the carrying seat 20 to return to the original position. Compared with the existing voice coil motor which drives the lens through magnetic force, the magnetic interference generated by the magnetic force is avoided. Compared with the existing voice coil motor with a complicated structure, the structure of driving the bearing seat 20 by the driving member 30 made of the electrostrictive element is simpler, and the miniaturization of the lens driving device 100 is facilitated.

Referring to fig. 9, the image capturing apparatus 200 according to the embodiment of the present invention includes the lens driving apparatus 100 and the lens, and the lens is mounted in the bearing seat 20 through the mounting groove 22. The driving member 30 drives the carrying seat 20, and the carrying seat 20 drives the relative position between the lenses to change, thereby implementing the auto-focusing function.

In some embodiments, the image capturing apparatus 200 further includes a prism 50, and the prism 50 is disposed on the housing 10 and in an object-side direction of the lens, and is used for changing a shooting direction of the image capturing apparatus 200. Specifically, the prism 50 is connected to the fixing frame 12 and faces the light through hole 122, and the prism 50 is disposed opposite to the lens to reflect light rays in other directions to the lens through the prism 50. The prism 50 changes the shooting direction of the image pickup device 200, so that the image pickup device 200 can be flexibly installed in the equipment, the thickness of the equipment is reduced, and the miniaturization of the equipment is facilitated.

The image pickup device 200 of the embodiment of the application has the advantages of no magnetic interference and high zooming precision. On one hand, the lens driving device 100 expands and contracts the driving member 30 to different degrees by applying different currents to the driving member 30, and drives the two bearing seats 20 and the lenses in the bearing seats 20 to approach or separate from each other, thereby avoiding magnetic interference generated by magnetic force. On the other hand, the driving of the driving member 30 made of electrostrictive element has higher driving precision than the magnetic driving, and thus the precision of zooming of the lens and the imaging apparatus 200 is improved.

Referring to fig. 10, the electronic device 300 according to the embodiment of the present disclosure includes a protective casing 60 and the image capturing device 200, where the image capturing device 200 is installed in the protective casing 60, and the prism 50 changes the shooting direction of the image capturing device 200, so that the image capturing device 200 is flexibly installed in the protective casing 60, the thickness of the electronic device 300 is reduced, and the electronic device 300 is conveniently miniaturized.

The electronic device 300 of the embodiment of the application has the advantages of no magnetic interference and high zooming precision. On one hand, the lens driving device 100 expands and contracts the driving member 30 to different degrees by applying different currents to the driving member 30, and drives the two bearing seats 20 and the lenses in the bearing seats 20 to approach or separate from each other, thereby avoiding magnetic interference generated by magnetic force. On the other hand, the driving method using the driving member 30 made of the electrostrictive element has higher driving precision than the magnetic driving method, and thus the precision of zooming the lens, the image pickup apparatus 200, and the electronic device 300 is improved.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A lens driving apparatus for driving two lenses to move, comprising:

a housing;

the two bearing seats are respectively and movably connected in the shell, one lens is arranged in each bearing seat, the two bearing seats are oppositely arranged, and the optical axes of the two lenses are overlapped; and

the driving part comprises an electrostrictive element, and the driving part stretches and retracts after being electrified and drives the two bearing seats and the lens in the bearing seats to be close to or far away from each other.

2. The lens driving device as claimed in claim 1, wherein each of the peripheral sides of the carrier and the inner structure of the housing has at least one set of connecting pins disposed oppositely, and the driving member has connecting members at both ends thereof, the connecting members having engaging slots, and the driving member is engaged with the corresponding connecting pins through the engaging slots of the connecting members.

3. The lens driving device as claimed in claim 2, wherein the housing has two elastic members, one of the elastic members is fixed to one side of the housing, the other of the elastic members is fixed to the other side of the housing, the two elastic members are respectively connected to the two carrying seats, the driving member is restored to the length before expansion after power failure, and the elastic members drive the two carrying seats and the lens therein to return to the original position.

4. The lens driving apparatus as claimed in claim 3, wherein the elastic member includes an inner fixing portion, an outer fixing portion and an elastic portion, the inner fixing portion and the outer fixing portion are connected by the elastic portion, the inner fixing portion is connected to the carrier, and the outer fixing portion is connected to the housing.

5. The lens driving apparatus as claimed in claim 4, wherein the elastic member is of a one-piece structure or a split structure.

6. The lens driving apparatus as claimed in claim 1, further comprising a circuit board, and a circuit connector electrically connected to the circuit board, the circuit connector being electrically connected to an external power supply, the circuit board being electrically connected to the driving member and controlling the magnitude of the current in the driving member.

7. The lens driving device as claimed in claim 6, further comprising a plurality of electrical connection portions electrically connected to the circuit board and respectively disposed on the inner structure of the housing, wherein an end of each driving member away from the carrying seat is electrically connected to the corresponding electrical connection portion.

8. The lens driving device according to claim 1, wherein two opposite position-limiting members are further disposed in the housing, the two position-limiting members are respectively slidably connected to the two bearing bases, an abutting portion is convexly disposed on a peripheral side of each bearing base, and the position-limiting members and the abutting portions cooperate to limit a sliding distance of the bearing bases.

9. An image pickup apparatus comprising a lens and the lens driving apparatus according to any one of claims 1 to 8, wherein the lens is mounted in the mount.

10. The image pickup apparatus according to claim 9, further comprising a prism provided in the lens object side direction.

11. An electronic apparatus comprising a protective case and the image pickup device according to claim 9 or 10, the image pickup device being mounted in the protective case.