CN216083214U - 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 matched with the magnet group, the base is provided with a second coil matched with the magnet group, the first coil is matched with the magnet group to drive the carrier to move along the direction of an optical axis, the second coil is matched with the magnet group to drive the frame and the carrier to move on a plane vertical to the optical axis, an elastic piece is arranged between the frame and the shell and surrounds the frame, the elastic piece comprises a rectangular frame main body, and a frame connecting part and a shell connecting part which are arranged at the top of the rectangular frame main body, and the frame connecting part and the shell connecting part are fixedly connected with the frame and the shell respectively.

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 apparatus and an elastic member of the lens driving apparatus to solve the above-mentioned problems of the prior art.

In order to solve the above-mentioned problems, according to an aspect of the present invention, there is provided a lens driving apparatus, the lens driving device 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 matched with the magnet group, the base is provided with a second coil matched with the magnet group, 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, and an elastic member disposed between the frame and the housing, the elastic member being disposed around the frame, wherein the elastic member comprises a rectangular frame main body, and a frame connecting part and a shell connecting part which are arranged at the top of the rectangular frame main body, the frame connecting part and the shell connecting part are respectively and fixedly connected with the frame and the shell.

In one embodiment, the bottom of the shell connecting part and the bottom of the frame connecting part are provided with elastic yielding grooves, the side parts of the frame are provided with yielding grooves matched with the elastic yielding grooves, and when the elastic piece is installed on the frame, the yielding grooves correspond to the elastic yielding grooves.

In one embodiment, the upper spring plate is formed as an integral structure and includes an inner ring fixedly coupled to the carrier, a frame fixing portion fixedly coupled to the frame, and an upper spring plate elastic strip elastically coupling the inner ring and the frame fixing portion, the frame fixing portion being fitted with four end corners of the frame and fixedly coupled between an upper surface of the magnet group and a lower surface of the frame.

In one embodiment, the lower spring plate is composed of four independent parts and respectively comprises a first connecting plate, a second connecting plate and a third connecting plate, and the first connecting plate, the second connecting plate and the third connecting plate are connected through the elastic strip of the lower spring plate and are respectively fixedly connected with the frame, the carrier and the base.

In one embodiment, a frame mounting protrusion is arranged at the bottom end of the frame, a carrier mounting protrusion is arranged on the lower surface of the carrier, a base mounting protrusion is arranged on the upper surface of the base, and the first connecting sheet, the second connecting sheet and the third connecting sheet of the lower spring are respectively fixed on the frame mounting protrusion, the carrier mounting protrusion and the base mounting protrusion.

In one embodiment, a magnet avoiding space is formed between a lower spring plate elastic strip of the lower spring plate, which is connected with the first connecting plate and the second connecting plate, and a lower spring plate elastic strip connected with the second connecting plate and the third connecting plate, and is used for avoiding the second coil and the magnet group.

In one embodiment, the shell comprises a top part and a side part, wherein a round hole matched with the lens is formed in the top part, a welding protrusion is arranged on the inner side wall of the top part, and a baking avoiding groove is formed in the periphery of the round hole.

In one embodiment, the housing connection part forms a housing connection piece and is connected to the top end inner wall of the housing by welding, and the frame connection part forms a frame connection piece and is connected to the top end inner wall of the frame by welding.

In one embodiment, a bending part is arranged between the frame connecting sheet and the shell connecting sheet and the side part of the elastic part.

In one embodiment, a corner is formed between each two sides of the rectangular frame body, and the four corners of the rectangular frame body are provided with hollowed-out portions.

According to another aspect of the present invention, there is also provided an elastic member of a lens driving apparatus, the lens driving apparatus including a housing and a frame, the elastic member being disposed between the frame and the housing and around the frame, the elastic member including a rectangular frame body and a frame connecting portion and a housing connecting portion provided at a top of the rectangular frame body, the frame connecting portion and the housing connecting portion being fixedly connected with the frame and the housing, respectively.

In one embodiment, the frame connecting portion forms a frame connecting piece and is connected with the top end inner wall of the frame by welding.

In one embodiment, the housing connection portion forms a housing connection tab and is connected to the top end inner wall of the housing by welding.

In one embodiment, a bending part is arranged between the frame connecting sheet and the shell connecting sheet and the side part of the elastic part.

In one embodiment, the bent part realizes the three-dimensional structure of the elastic piece through multi-stage bending.

In one embodiment, a corner is formed between each two adjacent side portions of the rectangular frame body, and a hollow portion is provided at four corners of the rectangular frame body.

In one embodiment, the bottom of the shell connecting part and the bottom of the frame connecting part are provided with elastic yielding grooves so as to increase the elastic deformation amount of the elastic piece moving on a plane perpendicular to the optical axis.

In one embodiment, the outer side of the shell connecting part is provided with a convex part to increase the welding area of the shell connecting part and the shell.

In one embodiment, the frame connecting part is disposed on top of one pair of opposite sides of the rectangular frame body, and the case connecting part is disposed on top of the other pair of opposite sides of the rectangular frame body.

In one embodiment, the frame connecting part and the shell connecting part are respectively arranged at the middle position of the side part where the frame connecting part and the shell connecting part are respectively arranged.

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 of one embodiment of the present invention.

Figures 4 and 5 are perspective views of an upper spring plate and a lower spring plate, respectively, according to an embodiment of the present invention

Fig. 6 and 7 are different perspective views of assembled parts of the lens driving mechanism according to the embodiment of the present invention.

Fig. 8 is a perspective view of a lens driving apparatus according to an embodiment of the present invention.

Fig. 9 is a perspective view of a base of a lens driving apparatus according to an embodiment of the present invention.

Fig. 10 is a perspective view of a housing of a lens driving apparatus according to an 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 the embodiments may 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 phrases "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.

Fig. 1 is an exploded perspective view of a lens driving apparatus according to an embodiment of the present invention. As shown in fig. 1, 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, wherein the frame 20 is provided with a magnet set 21, the carrier 30 is provided with a first coil 31 cooperating with the magnet set 20, the base 40 is provided with a second coil 41 cooperating with the magnet set 21, the first coil 31 cooperates with the magnet set 21 to drive the carrier 30 to move along an optical axis direction, the second coil 41 cooperates with the magnet set 21 to drive the frame 20 and the carrier 30 to move on a plane perpendicular to the optical axis, and an elastic member 70 is disposed between the frame 20 and the housing 10, and the elastic member 70 realizes a return motion of the frame 20 and the carrier 30. It should be noted that the magnet assembly 21 of the present invention is disposed on the frame 20 and serves to cooperate with the first coil 31 and the second coil 41 at the same time, however, it will be understood by those skilled in the art that different magnet assemblies may be disposed to cooperate with the first coil and the second coil, respectively, for example, the first magnet assembly is disposed to cooperate with the first coil 31 and the second magnet assembly is disposed to cooperate with the second coil 41. The utility model has higher anti-shake performance and can realize higher-quality imaging effect compared with the traditional lens driving device which only depends on the upper reed and the lower reed for resetting by adding the elastic part 70 for the resetting operation after the translation of the frame and the carrier.

Specifically, fig. 2 is a perspective view of the elastic member 70 according to an embodiment of the present invention. As shown in fig. 2, the elastic member 70 is formed into a rectangular frame structure as a whole and is disposed around the frame 20, and the elastic member 70 includes a rectangular frame main body 71, and a frame connecting portion 72 and a case connecting portion 73 which are disposed on the top of the rectangular frame main body 71, preferably, the frame connecting portion 72 is disposed on the top of one pair of opposite side portions of the rectangular frame main body 71, and the case connecting portion 73 is disposed on the top of the other pair of opposite side portions of the rectangular frame main body 71, preferably, the frame connecting portion 72 and the case connecting portion 73 are disposed at middle positions of the respective side portions, that is, the frame connecting portion 72 and the case connecting portion 73 divide the respective side portions into two approximately equal portions, and the side portions thereof are disposed approximately axisymmetrically with respect to the frame connecting portion 72 or the case connecting portion 73.

In one embodiment, the frame connecting portion 72 forms a frame connecting piece and is connected to the top end of the frame 20 by welding, and optionally, the case connecting portion 73 forms a case connecting piece and is connected to the top end inner wall of the case 10 by welding. Optionally, a bending portion 74 is disposed between the frame connecting sheet and the shell connecting sheet and the side portion of the elastic member 70, and the bending portion 74 realizes a three-dimensional structure of the elastic member 70 through multi-stage bending and avoids metal fatigue caused by bending by 90 degrees at one time.

In one embodiment, a corner is formed between each two sides of the rectangular frame body 71, and optionally, the four corners of the rectangular frame body 71 are provided with hollowed-out portions 75, which can increase the elastic deformation amount of the elastic member 70 moving on a plane perpendicular to the optical axis.

Alternatively, an elastic relief groove 76 for increasing an amount of elastic deformation of the elastic member 70 moving on a plane perpendicular to the optical axis is provided at the bottom of the housing connecting portion 72 and the frame connecting portion 73.

Optionally, a convex portion 731 is disposed on the outer side of the housing connecting portion 73, which can increase the welding area between the housing connecting portion 73 and the housing, and enhance the connection stability.

Fig. 3 is a perspective view of a frame 20 according to an embodiment of the present invention, as shown in fig. 3, in an embodiment, the frame 20 forms a rectangular frame structure, a magnet group 21 includes four magnets and is respectively disposed at four end corners of the frame 20, optionally, the four end corners of the frame 20 are provided with magnet grooves 23, the magnet grooves 23 are used for mounting the magnets, a frame top plate 24 is disposed at the top end of the magnet grooves 23, a frame fixing portion 52 of an upper spring 50 is disposed between the magnet top end and the frame top plate 24, and an inner ring of the upper spring 50 is connected with the top end of the carrier. The magnet assembly 21 is fixedly mounted on the frame 20, that is, the magnet assembly 21 and the frame 20 form a whole, and the frame 20 moves when the magnet assembly 21 moves.

In one embodiment, the side of the frame 20 is provided with an escape groove 25 cooperating with the elastic relief groove 76 of the elastic member 70, and the escape groove 25 corresponds to the elastic relief groove 76 when the elastic member 70 is mounted on the frame 20.

Fig. 4 and 5 are perspective views of an upper spring plate and a lower spring plate, respectively, according to an embodiment of the present invention. As shown in fig. 4-5, in one embodiment, the upper spring plate 50 is integrally formed into a unitary structure and includes an inner ring 51 fixedly connected to the carrier 30, a frame fixing portion 52 fixedly connected to the frame 30, and an upper spring plate elastic strip 53 elastically connecting the inner ring 51 and the frame fixing portion 52, in one embodiment, the frame fixing portion 52 is engaged with four corners of the frame 20 and is preferably fixedly connected between the upper surface of the magnet set 21 and the lower surface of the frame 20, when the first coil 31 is energized, the first coil forms electromagnetic induction with the magnet set 21 and drives the magnet set 21 to move the frame 20 along the optical axis direction, so as to implement the optical zoom function, during the movement of the frame 20, since the frame 20 is connected to the carrier 30 through the upper spring plate 50, the upper spring plate elastic strip 53 of the upper spring plate 50 is stretched and deformed, so that after the frame 20 moves to a certain extent, the upper spring elastic strip 53 generates a restoring force for driving the frame 20 back to the original position, and the frame 20 is driven back to the original position by the restoring force.

Alternatively, the lower spring 60 is integrally composed of four independent parts, each of which has a similar structure and shape, and only one of the parts is described below as an example, for the sake of convenience, the parts will be referred to as the lower spring hereinafter, and referring to fig. 3 and 5, the lower spring 60 is disposed on the base 40 and includes a first connecting piece 61, a second connecting piece 62, and a third connecting piece 63, the first connecting piece 61, the second connecting piece 62, and the third connecting piece 63 are elastically connected by a lower spring elastic strip 64 and fixedly connected to the frame 20, the carrier 30, and the base 40, respectively, and the lower spring 60 plays a role in restoring the carrier 30 and the frame 20 and communicating the base built-in circuit with the carrier built-in circuit.

Fig. 6 to 7 are perspective views of assembled parts of the lens driving mechanism according to one embodiment of the present invention, as shown in fig. 3 and 6 to 7, in one embodiment, the bottom end of the frame 20 is provided with a frame mounting protrusion 22, optionally, the frame mounting protrusion 22 is disposed adjacent to the avoiding groove 25, the lower surface of the carrier 30 is provided with a carrier mounting protrusion 32, the upper surface of the base 40 is provided with a base mounting protrusion 43, the first connecting piece 61, the second connecting piece 62 and the third connecting piece 63 of the lower spring 60 are respectively fixed on the frame mounting protrusion 22 of the frame 20, the carrier mounting protrusion 32 of the carrier 30 and the base mounting protrusion 43 of the base 40, for example, by welding, and the upper spring 60 plays a role in resetting the carrier 30 and the frame 20 and communicating the base built-in circuit with the carrier built-in circuit, which will be further described below.

Optionally, a magnet avoiding space is formed between the lower spring elastic strip of the lower spring 60 connecting the first connecting piece 61 and the second connecting piece 62 and the lower spring elastic strip connecting the second connecting piece 62 and the third connecting piece 63, and is used for avoiding between the coil and the magnet group in the base.

Fig. 8 is a perspective view of a lens driving apparatus according to an embodiment of the present invention, and fig. 9 is a perspective view of a base of the lens driving apparatus according to an embodiment of the present invention. As shown in fig. 8-9, in one embodiment, the second coil 41 is embedded inside four corners of the base 40 to form an embedded coil, the embedded coil is disposed corresponding to the magnet set 21, the embedded coil is connected to the embedded circuit of the base, when the carrier moves on a plane perpendicular to the optical axis, the magnet is moved by the force between the embedded coil and the magnet after being electrified, so as to drive the frame and the carrier to move in the plane, and the lower spring and the elastic member are used for the resetting operation of the frame and the carrier.

With continued reference to fig. 8-9, the bottom of the base 40 is provided with a sensor mounting groove 44 for placing two position sensors 45, the position sensors 45 correspond to the magnet set 21, the two position sensors 45 are respectively used for detecting the moving distance of the magnet on the X axis and the Y axis on the plane perpendicular to the optical axis, so as to monitor the carrier according to the moving position of the magnet and further detect the position of the lens, and optionally, the base 40 is provided with a circuit pin 46 for communicating the built-in circuit of the base with an external circuit.

Fig. 10 is a perspective view of a housing 10 of a lens driving apparatus according to an embodiment of the present invention. As shown in fig. 10, the housing 10 includes a top portion and a side portion, the top portion is formed with a circular hole matched with the lens and is provided with a welding protrusion 12 on an inner side wall, the peripheral portion of the circular hole is further provided with a baking avoiding groove 13, the welding protrusion 12 is used for welding with an upper end face of a housing connecting portion of the elastic member 70, and the baking avoiding groove 13 is used for performing a baking operation on glue between a lower end face of a frame connecting portion of the elastic member 70 and an upper end face of the frame, thereby facilitating the overall installation work.

During the assembly, base 40 sets up reed 60 down, connect frame 20 and carrier 30 below reed 60, frame 20 cup joints in the carrier 30 outside, set up magnet group 21 between frame inside wall and the carrier lateral wall, set up reed 50 between magnet top and the carrier, carrier 30 cup joints first coil 31, when carrying out longitudinal movement, built-in circuit in base 40 gives first coil 31 with current transmission through the built-in circuit of reed 60 and carrier down, first coil 31 after the circular telegram and produce the ampere force between magnet group 21 and carry out longitudinal movement operation, it is used for the reset operation of carrier 30 with lower reed 60 to go up reed 50. An elastic part 70 is arranged between the outer side of the frame and the inner side wall of the shell, when the carrier moves in a plane perpendicular to the optical axis direction, the built-in coil (namely the second coil 41) on the base 40 is electrified and then acts on the magnet group 21 to enable the magnet to move in the plane, so that the frame and the carrier are driven to move in the plane, and the lower spring piece and the elastic part 70 are used for resetting the frame and the carrier.

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 (10)

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 elastic piece is arranged around the frame and comprises a rectangular frame main body, and a frame connecting part and a shell connecting part which are arranged at the top of the rectangular frame main body, wherein the frame connecting part and the shell connecting part are fixedly connected with the frame and the shell respectively.

2. The lens driving device according to claim 1, wherein the bottom of the housing connecting portion and the bottom of the frame connecting portion are provided with elastic yielding grooves, the side portion of the frame is provided with yielding grooves cooperating with the elastic yielding grooves, and when the elastic member is mounted on the frame, the yielding grooves correspond to the elastic yielding grooves.

3. A lens driving device according to claim 1, wherein the upper spring is formed in an integral structure and includes an inner ring fixedly attached to the carrier, a frame fixing portion fixedly attached to the frame, and an upper spring elastic strip elastically connecting the inner ring and the frame fixing portion, the frame fixing portion being fitted to four end corners of the frame and fixedly attached between an upper surface of the magnet group and a lower surface of the frame.

4. A lens driving apparatus according to claim 1, wherein the lower spring is composed of four parts independent of each other and includes a first connecting piece, a second connecting piece, and a third connecting piece, respectively, and the first connecting piece, the second connecting piece, and the third connecting piece are connected by a lower spring elastic strip and fixedly connected to the frame, the carrier, and the base, respectively.

5. The lens driving device according to claim 4, wherein a frame mounting protrusion is provided at a bottom end of the frame, a carrier mounting protrusion is provided at a lower surface of the carrier, a base mounting protrusion is provided at an upper surface of the base, and the first connecting piece, the second connecting piece, and the third connecting piece of the lower spring are fixed to the frame mounting protrusion, the carrier mounting protrusion, and the base mounting protrusion, respectively.

6. The lens driving device according to claim 4, wherein a magnet escape space is formed between a lower spring elastic strip of the lower spring connecting the first connecting piece and the second connecting piece and a lower spring elastic strip connecting the second connecting piece and the third connecting piece, for escape between the second coil and the magnet group.

7. The lens driving device according to claim 1, wherein the housing includes a top portion and a side portion, the top portion is formed with a circular hole for fitting the lens and provided with a welding protrusion on an inner side wall of the top portion, and a baking avoiding groove is provided on a peripheral portion of the circular hole.

8. A lens driving apparatus according to claim 1, wherein the housing connecting portion forms a housing connecting piece and is connected to a top end inner wall of the housing by welding, and the frame connecting portion forms a frame connecting piece and is connected to a top end inner wall of the frame by welding.

9. The lens driving device according to claim 8, wherein a bent portion is provided between the frame connecting piece and the housing connecting piece and a side portion of the elastic member.

10. The lens driving device according to claim 1, wherein a corner is formed between each two side portions of the rectangular frame body, and a hollow portion is provided at four of the corner portions of the rectangular frame body.

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