CN216622810U - Lens driving device - Google Patents

Abstract

The utility model discloses a lens driving device, which comprises a shell, a frame, a carrier, a base, an upper reed and a lower reed, wherein the frame is provided with a magnet group, the carrier is provided with a first coil, the base is provided with a second coil, the first coil and the magnet group are matched to drive the carrier to move along the direction of an optical axis, the second coil and the magnet group are matched to drive the frame and the carrier to move on a plane vertical to the optical axis, an elastic part is arranged between the frame and the base, the elastic part comprises a plurality of mutually independent parts and is arranged around the frame, each independent part of the elastic part comprises a base connecting part, a frame connecting part and an elastic part connecting the base connecting part and the frame connecting part, the base connecting part is connected with the base, and the frame connecting part is connected with the bottom end of the frame, so that the frame and the base can be movably connected through the elastic part. The utility model can solve the problem that the traditional optical element driving device has poor resetting capability after the carrier is displaced, and improves the optical anti-shake performance of the optical element driving device.

Description

Lens driving device

Technical Field

The utility model relates to the field of optics, in particular to a lens driving device.

Background

Along with smart mobile phone's a large amount of popularizations, cell-phone camera's range of application is bigger and bigger, however, cell-phone camera's sensor is mostly laid in the module outside the motor at present, side FPC adopts flexible circuit board, produce perk scheduling problem, the sensor detects unstably, side FPC adopts flexible circuit board simultaneously, the installation unevenness can influence actual motion stroke, the vertical direction motion part of middle carrier, in the coil on the carrier is retransmitted to last reed through the power transmission of suspension wire with bottom FPC, when the motor receives the impact or after the operation of permanent time, suspension wire reliability step-down, the easy problem of appearing fracture etc. leads to whole motor to become invalid. In addition, the carrier is generally elastically connected with the frame and the base through the upper reed and the lower reed, and in the moving process of the carrier, the restoring force provided by the upper reed and the lower reed is insufficient, so that the resetting process of the carrier is not sensitive enough, and the imaging quality is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a lens driving device to solve the above problems in the prior art.

In order to solve the above problems, according to an aspect of the present invention, there is provided a lens driving device including a housing, a frame, a carrier, a base, an upper spring, and a lower spring, the frame being provided with a magnet group, the carrier being provided with a first coil cooperating with the magnet group, the base being provided with a second coil cooperating with the magnet group, the first coil cooperating with the magnet group to drive the carrier to move in an optical axis direction, the second coil cooperating with the magnet group to drive the frame and the carrier to move in a plane perpendicular to the optical axis, and

the frame with set up the elastic component between the base, the elastic component includes a plurality of mutually independent parts and encircles the frame is arranged, each of elastic component independent part includes base connecting portion, frame connecting portion and connects the elastic component of base connecting portion and frame connecting portion, the base connecting portion is connected with the base, the frame even portion with the frame bottom is connected, thereby through the elastic component will the frame with base swing joint.

In one embodiment, the elastic portion includes a first hollow portion, a bending portion and a second hollow portion, the first hollow portion and the second hollow portion are respectively disposed at two adjacent sides of the frame, and the bending portion is disposed at a corner of the frame and connects the first hollow portion and the second hollow portion.

In one embodiment, the frame connecting portion is a frame connecting piece, the base connecting portion is a base connecting piece, and the frame connecting piece and the base connecting piece of the same elastic piece are located on two adjacent sides of the frame and are respectively arranged at the bottom of the frame and the bottom of the base.

In one embodiment, the frame is arranged above the base, magnet grooves are arranged on the inner sides of four end corners of the frame and used for mounting the magnet groups, and elastic piece limiting grooves are arranged on the outer side wall of the frame and used for limiting the elastic pieces.

In one embodiment, a first avoidance groove is formed in the middle of the outer side wall of the frame and used for avoiding the base connecting piece of the elastic piece.

In one embodiment, a second avoiding groove is formed in the bottom end of the end corner of the frame and used for avoiding the bent portion of the elastic member.

In one embodiment, a second mounting protrusion is arranged on the side surface of the frame, is connected with the elastic piece and enables the elastic piece and the frame to be in an overhead state; preferably, the bottom end of the second mounting protrusion is connected with the elastic member.

In one embodiment, the frame is provided with a limiting groove on the inner side, and the carrier is provided with a limiting protrusion on the outer side, wherein the limiting groove and the limiting protrusion are matched to limit the longitudinal movement range of the carrier.

In one embodiment, four corners of the top end of the frame are provided with frame top protrusions, the top end of the carrier is provided with carrier top protrusions, and the frame top protrusions and the carrier top protrusions provide space for installing the upper spring to prevent the upper spring from directly contacting with the top of the shell.

In one embodiment, a first coil is arranged on the outer side of the carrier, the first coil cooperates with a magnet when being electrified to drive the carrier to move along the optical axis direction, wherein an upper reed connecting column is arranged at the upper end of the carrier and the upper end of the frame to be connected with the upper reed, a lower reed connecting column is arranged at the bottom end of the frame, a lower reed connecting convex ring is arranged at the bottom end of the carrier, and the lower reed connecting convex ring and the lower reed connecting column are connected with the lower reed.

In one embodiment, the base is provided with a first mounting protrusion connected with the elastic member, the first mounting protrusion is provided with a first power-on point, the first power-on point is connected with the internal circuit of the base, the bottom end of the frame is provided with a second power-on point, the first power-on point and the second power-on point are connected through the elastic member, the frame is internally provided with a built-in frame circuit, the top end of the frame is provided with a third power-on point, the second power-on point and the third power-on point are connected through the built-in frame circuit, the carrier is internally provided with a built-in carrier circuit, the third power-on point is communicated with the built-in carrier circuit through the upper spring, and the built-in carrier circuit is communicated with the first coil.

In one embodiment, the lens driving device includes two first energization points, two second energization points, two third energization points, and two upper springs, and when a power supply operation is performed, one set of the first energization points, the second energization points, the third energization points, and the upper springs is used for current input, and the other set of the first energization points, the second energization points, the third energization points, and the upper springs is used for current output, so that a closed circuit is formed.

In one embodiment, a coil groove and a damping rubber groove are formed in the base, the coil groove is used for placing a second coil, the second coil is communicated with an internal circuit of the base, the damping rubber groove is used for placing a damping block, the internal circuit of the frame is formed by metal sheets, the metal sheets stretch out of the bottom end of the frame to form a damping insertion rod, the damping insertion rod is inserted into the damping block, the damping insertion rod assists the frame to restore to the original position after the X-axis and the Y-axis move through the elastic action of the damping block, and meanwhile, the insulating effect can be achieved.

In one embodiment, two position sensors are arranged at the bottom end of the base, and the two position sensors are powered by internal circuits of the base and respectively cooperate with two different magnets to monitor the displacement of the lens in the X-axis direction and the Y-axis direction.

The lens driving device can solve the problem that the traditional optical element driving device has poor resetting capability after the carrier is displaced, and improves the optical anti-shake performance of the optical element driving device.

Drawings

Fig. 1 is an exploded perspective view of a lens driving apparatus according to an embodiment of the present invention.

Fig. 2 is a perspective view of an elastic member according to an embodiment of the present invention.

Fig. 3 is a perspective view of a frame with an elastic member mounted thereto according to an embodiment of the present invention.

Fig. 4-5 are perspective views of a frame of one embodiment of the present invention from different perspectives.

Fig. 6-7 are perspective views of different perspectives of a carrier according to one embodiment of the present invention.

Fig. 8 is a perspective view of a base of one embodiment of the present invention.

Fig. 9 is a perspective view of a base mounted with a resilient member according to one embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment can be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

The present disclosure generally relates to a lens driving device, which can be used in a terminal product such as a mobile phone and a tablet computer to cooperate with a lens to achieve functions of taking pictures and recording videos.

Fig. 1 is an exploded perspective view of a lens driving device 100 according to an embodiment of the present invention, and fig. 2 is a perspective view of an elastic member 70 according to an embodiment of the present invention, as shown in fig. 1-2, the lens driving device 100 includes a housing 10, a frame 20, a carrier 30, a base 40, an upper spring 50, and a lower spring 60, the frame 20 is provided with a magnet assembly 21, the magnet assembly 21 is composed of a plurality of magnets, the carrier 30 is used for mounting a lens 80 and is provided with a first coil 31 (see fig. 6) engaged with the magnet assembly 21, the base 40 is provided with a second coil 41 (see fig. 9) engaged with the magnet assembly 21, the first coil 31 is engaged with the magnet assembly 21 to drive the carrier 30 to move along an optical axis direction to implement an optical zoom function, and the second coil 41 is engaged with the magnet assembly 21 to drive the frame 20 and the carrier 30 to move on a plane perpendicular to the optical axis to implement an optical anti-shake function. An elastic member 70 is provided between the frame 20 and the base 40, the elastic member 70 is composed of a plurality of mutually independent parts which are preferably provided to have the same structure and shape and are arranged around the frame 20, each of the parts of the elastic member 70 includes a base connection part 71, a frame connection part 72, and an elastic part 73 connecting the base connection part and the frame connection part, the base connection part 71 is connected with the base 40, and the frame connection part 72 is connected with the frame 20, so that the frame 20 and the base 40 are movably connected by the elastic member 70. The problem that the resetting capability of the carrier 30 is not strong after displacement is solved through the ingenious design of the elastic piece 70, the resetting capability of the deformed carrier 30 is enhanced, and the optical anti-shake performance of the optical element driving device is improved.

Referring to fig. 2, in an embodiment, each independent portion of the elastic member 70 is the same, and thus, one of the portions is taken as an example for description, alternatively, the elastic portion 73 includes a first hollow portion 731, a bending portion 733 and a second hollow portion 732, the first hollow portion 731 and the second hollow portion 732 are respectively disposed at two adjacent sides of the frame 20, and the bending portion 733 is disposed at a corner of the frame and connects the first hollow portion 731 and the second hollow portion 732. The first hollowed-out portion 731, the bending portion 733, and the second hollowed-out portion 732 improve the elastic deformation of the elastic member, increase the range of motion of the frame relative to the base, and further enhance the optical anti-shake effect.

With continued reference to FIG. 2, in one embodiment, the frame connecting portion 72 is a frame connecting piece, the base connecting portion 71 is a base connecting piece, and the frame connecting piece 72 and the base connecting piece 71 of the same portion of the elastic member 70 are located on two adjacent sides of the frame 20 and are respectively disposed on the bottom of the frame 20 and the bottom of the base 40, that is, the frame connecting piece 72 and the base connecting piece 71 are respectively integrally and inwardly formed from the bottom of the elastic portion 73. Optionally, with reference to fig. 8, the frame connecting portion 72 is provided with a frame connecting hole 721, the frame connecting hole 721 is connected to a first elastic sheet connecting column 722 on the frame 20, the base connecting portion 71 is provided with a base connecting hole 711, and the base connecting hole 711 is connected to a second elastic sheet connecting column 712 on the base 40.

Fig. 3 is a perspective view of the frame 20 with the elastic member 70 mounted thereon, fig. 4-5 are perspective views of the frame 40 from different viewing angles, as shown in fig. 3-5, in one embodiment, the frame 20 is disposed above the base 40, magnet grooves 22 are disposed inside four corners of the frame 20 to mount the magnet groups 21, and an elastic member limiting groove 23 is disposed on an outer side wall of the frame to limit the elastic member 70. Alternatively, the elastic member limiting groove 23 may be provided in a semi-open structure, that is, the elastic member limiting groove 23 may be formed by providing the sidewall of the frame 20 as a recessed step, and when the elastic member 70 is mounted on the step, the outer surface is substantially flush with the outer surface of the frame 20 and the lower surface is located above the base 40.

With continued reference to fig. 3-5, in one embodiment, the frame 20 is provided with a first escape slot 24 in a central portion of an outer sidewall thereof for escaping the base connection tab 71 of the resilient member 70. The base connection piece 71 of the elastic member 70 is mounted in the first escape groove 24.

Referring to fig. 3 to 5, in one embodiment, the bottom end of the end corner of the frame is provided with a second avoiding groove 25, and the bending part 733 of the elastic member 70 is avoided by the second avoiding groove 25, and optionally, the second avoiding groove 25 is formed by recessing from the end corner of the frame 20, that is, the second avoiding groove 25 is formed by a notch at a lower position of the end corner of the frame 20, and the bending part 733 of the elastic member 70 is disposed in the notch 25.

In one embodiment, the side of the frame 20 is provided with a second mounting protrusion 26, the second mounting protrusion 26 is connected with the elastic member 70 and makes the elastic member 70 and the frame 20 in an overhead state, and preferably, the bottom end of the second mounting protrusion 26 is connected with the elastic member 70.

Fig. 6 to 7 are perspective views of different viewing angles of the carrier 30 according to an embodiment, and referring to fig. 3 to 7, in an embodiment, the inside of the frame 20 is provided with a limiting groove 27, the outside of the carrier 30 is provided with a limiting protrusion 32, and the limiting groove 27 and the limiting protrusion 32 cooperate to limit the longitudinal movement range of the carrier 30, that is, the movement range in the optical axis direction. Optionally, the top of the limiting groove 27 is open, the bottom is closed, and when the carrier 30 moves downward, i.e. toward the base 40, within a certain range, the limiting protrusion 32 contacts with the bottom of the limiting groove 27, and prevents the carrier 30 from moving further downward.

With continued reference to fig. 3-7, in one embodiment, the four corners of the top end of the frame 20 are provided with frame top protrusions 28, the top end of the carrier 30 is provided with carrier top protrusions 33, and the frame top protrusions 28 and the carrier top protrusions 33 provide space for the upper spring 50 to be mounted so as to avoid the upper spring 50 from directly touching the top of the housing 10, that is, when the upper spring 50 is mounted on the top of the frame 20 and the carrier 30, the carrier top protrusions 33 and the frame top protrusions 28 protrude from the upper surface of the upper spring 50, so that when the carrier and the frame move, the carrier top protrusions 33 and the frame top protrusions 28 contact the top of the housing 10, the upper spring 50 is prevented from directly contacting the top of the housing 10, and the upper spring 50 is prevented from being damaged.

Referring to fig. 3 to 7, in one embodiment, a first coil 31 is disposed on an outer side of the carrier 30, and the first coil 31 cooperates with the magnet assembly 21 when being energized to drive the carrier 30 to move along the optical axis direction, wherein an upper reed connecting post 51 is disposed on each of an upper end of the carrier 30 and an upper end of the frame 20 to connect with the upper reed 50, a lower reed connecting post 61 is disposed on a bottom end of the frame 20, and a lower reed connecting convex ring 34 is disposed on a bottom end of the carrier 30, and the frame 20 and the carrier 30 are connected with the lower reed 60 through the lower reed connecting post 61 and the lower reed connecting convex ring 34, respectively.

Fig. 8 is a perspective view of a base 40 according to an embodiment of the present invention, fig. 9 is a perspective view of a base with an elastic member mounted thereon according to an embodiment of the present invention, as shown in fig. 8-9, in an embodiment, the base 40 is provided with a first mounting protrusion 42 connected with the elastic member 70, the first mounting protrusion 42 is provided with a first conduction point 421, the first conduction point 421 is connected with a base internal circuit (not shown) of the base 40, in combination with fig. 5, the bottom end of the frame 20 is provided with a second conduction point 291, the first conduction point 421 and the second conduction point 291 are electrically connected with each other through the elastic member 70, the frame 20 is internally provided with a frame internal circuit (not shown), the top end of the frame 20 is provided with a third conduction point 292, the second conduction point 291 and the third conduction point 292 are connected with the frame internal circuit, and the carrier is internally provided with a carrier internal circuit (not shown), the third conduction point 292 is communicated with the carrier internal circuit through an upper spring 50, the carrier built-in wiring communicates with the first coil 31.

Alternatively, the lens driving device 100 includes two first energization points 421, two second energization points 291, two third energization points 293, and two upper springs 50, and when a power supply operation is performed, one set of the first energization points 421, the second energization points 291, the third energization points 292, and one upper spring 50 is used for current input, and the other set of the first energization points 421, the second energization points 291, the third energization points 292, and one upper spring 50 is used for current output, thereby forming a closed circuit.

Referring to fig. 8-9 in combination with fig. 3, in an embodiment, a coil groove 43 and a damping glue groove 44 are formed in the base 40, the coil groove 43 is used for placing the second coil 41, the second coil 41 is communicated with an internal circuit of the base 40, the damping glue groove 44 is used for placing a damping block 45, the internal circuit of the frame is formed by a metal sheet, the metal sheet extends out from the bottom end of the frame to form a damping insertion rod 294, the damping insertion rod 294 is inserted into the damping block 45, and the elastic action of the damping block 45 is used for assisting the frame 20 to recover to the original position after moving on a plane perpendicular to the optical axis and playing an insulating role.

In one embodiment, the bottom end of the base 40 is provided with two position sensors powered by internal circuitry of the base, which cooperate with two different magnets of the magnet assembly 21 to monitor the position of the lens in two axes, e.g., the X-axis and the Y-axis, in a plane perpendicular to the optical axis.

In summary, the optical element driving apparatus of the present invention has a wide commercial application range, and can be widely applied to various electronic devices such as mobile phones and smart phones.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the utility model can be effected therein by those skilled in the art after reading the above teachings of the utility model. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (14)

1. The utility model provides a lens driving device, its characterized in that, lens driving device includes shell, frame, carrier, base, goes up reed and reed down, the frame is equipped with magnet group, the carrier be equipped with magnet group complex first coil, the base be equipped with magnet group complex second coil, first coil with magnet group cooperation drive carrier moves along optical axis direction, the second coil with magnet group cooperation drive the frame with the carrier moves on the plane of perpendicular to optical axis to and

the frame with set up the elastic component between the base, the elastic component includes mutually independent part and encircles the frame is arranged, each of elastic component independent part includes base connecting portion, frame connecting portion and connects base connecting portion and frame connecting portion's elasticity portion, base connecting portion are connected with the base, frame connecting portion with the frame bottom is connected, thereby will through the elastic component the frame with base swing joint.

2. The lens driving apparatus according to claim 1, wherein the elastic portion includes a first hollow portion, a bending portion and a second hollow portion, the first hollow portion and the second hollow portion are respectively disposed at two adjacent sides of the frame, and the bending portion is disposed at a corner of the frame and connects the first hollow portion and the second hollow portion.

3. The lens driving device according to claim 1, wherein the frame connecting portion is a frame connecting piece, the base connecting portion is a base connecting piece, and the frame connecting piece and the base connecting piece of the same elastic member are located on adjacent sides of the frame and are respectively provided at a bottom of the frame and a bottom of the base.

4. The lens driving device as claimed in claim 1, wherein the frame is disposed above the base, magnet grooves are disposed inside four corners of the frame for mounting the magnet assembly, and an elastic member limiting groove is disposed on an outer side wall of the frame for limiting the elastic member.

5. The lens driving apparatus as claimed in claim 2, wherein a first avoiding groove is provided in a middle portion of an outer side wall of the frame for avoiding the base connecting piece of the elastic member.

6. The lens driving device according to claim 2, wherein a second escape groove is provided at a bottom end of the corner of the frame for escaping the bent portion of the elastic member.

7. The lens driving device according to claim 1, wherein a second mounting protrusion is provided on a side surface of the frame, the second mounting protrusion being connected to the elastic member and making the elastic member and the frame in an overhead state; preferably, the bottom end of the second mounting protrusion is connected with the elastic member.

8. The lens driving device according to claim 1, wherein a limiting groove is provided on an inner side of the frame, and a limiting protrusion is provided on an outer side of the carrier, the limiting groove and the limiting protrusion cooperating to limit a longitudinal movement range of the carrier.

9. A lens driving apparatus according to claim 1, wherein the frame top four corners are provided with frame top protrusions, and the carrier top is provided with carrier top protrusions, and space is provided for installation of the upper spring by the frame top protrusions and the carrier top protrusions, and the upper spring is prevented from coming into direct contact with the top of the housing.

10. The lens driving device according to claim 1, wherein a first coil is provided on an outer side of the carrier, and the first coil cooperates with a magnet when being energized to drive the carrier to move in the optical axis direction, wherein an upper reed connecting post is provided on each of the upper end of the carrier and the upper end of the frame to connect to the upper reed, and a lower reed connecting boss is provided on the bottom end of the frame and a lower reed connecting boss is provided on the bottom end of the carrier, and the lower reed is connected to the lower reed through the lower reed connecting boss and the lower reed connecting post.

11. A lens driving device according to claim 1, wherein the base is provided with a first mounting projection to which the elastic member is connected, the first mounting projection is provided with a first energization point, the first energization point is connected to the base internal circuit, the frame bottom end is provided with a second energization point, the first energization point is connected to the second energization point via the elastic member, a frame internal circuit is provided inside the frame, the frame top end is provided with a third energization point, the second energization point is connected to the third energization point via the frame internal circuit, and a carrier internal circuit is provided inside the carrier, the third energization point is communicated with the carrier internal circuit via the upper spring, and the carrier internal circuit is communicated with the first coil.

12. The lens driving device according to claim 11, wherein the lens driving device includes two of the first energization points, two of the second energization points, two of the third energization points, and two of the upper springs, and when a power supply operation is performed, one set of the first energization points, the second energization points, the third energization points, and the upper springs is used for current input, and the other set of the first energization points, the second energization points, the third energization points, and the upper springs is used for current output, thereby forming a closed circuit.

13. The lens driving device according to claim 11, wherein the base has a coil recess for receiving the second coil and a damping rubber recess for receiving the damping block, the coil recess is formed in the base, the second coil is connected to an internal circuit of the base, the damping rubber recess is formed in the damping block, the internal circuit of the frame is formed of a metal plate, the metal plate extends from a bottom end of the frame to form a damping rod, the damping rod is inserted into the damping block, and the damping rod assists the frame to return to its original position after the movement of the X-axis and the Y-axis by an elastic action of the damping block, and has an insulating effect.

14. A lens driving apparatus according to claim 11, wherein two position sensors are provided at a bottom end of the base, the two position sensors being powered by internal circuitry of the base and cooperating with two different magnets respectively to monitor the displacement of the lens in the X-axis direction and the Y-axis direction.

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