CN214375501U - Optical element driving mechanism - Google Patents

Abstract

The utility model discloses an optical element actuating mechanism, including carrier, base, frame and circuit board. The carrier is movably installed in the frame and is provided with a first group of coils, the circuit board is fixedly installed on the base and is provided with a second group of coils, and the frame is provided with a first group of magnets matched with the first group of coils and a second group of magnets matched with the second group of coils. When the first group of coils is electrified, the first group of coils and the first group of magnets are matched to drive the carrier to move along the optical axis direction, and when the second group of coils is electrified, the second group of coils and the second group of magnets are matched to drive the base to move on a plane vertical to the optical axis. The utility model discloses can realize more excellent zooming and anti-shake effect to obtain better image quality.

Description

Optical element driving mechanism

Technical Field

The utility model relates to an optics field, concretely relates to optical element actuating mechanism.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) have a function of taking pictures or recording videos. The use of these electronic devices is becoming more common and the design direction of these electronic devices is being developed to be more convenient and thinner to provide more choices for users. However, sometimes the photos shot in the current mobile phone shooting process are blurred, that is, the shot pictures are not clear enough, and even ghost images or blur occur. These causes, in addition to occasional defocus (i.e., the camera fails to focus properly), are largely due to slight jitter that occurs when the photographic scene is exposed.

Generally, such a slight shake often occurs in a handheld condition, and thus a lens deviation of the image pickup apparatus is caused, so that the quality of an image captured by the image sensor is deteriorated. Therefore, in recent years, the demand for developing the anti-shake function is relatively large.

However, most of the prior art implements the optical zoom and the optical anti-shake functions through the movement of the same component (carrier), and the movement range of the carrier is limited by weight, volume and the like, so that the trouble of taking blurred pictures due to hand shake in the shooting process cannot be effectively solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an optical element actuating mechanism to zoom with optics and optics anti-shake realizes through the part motion of difference, thereby solves and shoots the in-process and cause the problem of taking out the blurred picture because of the hand shake.

In order to solve the problem, according to the utility model discloses an aspect provides an optical element actuating mechanism, optical element actuating mechanism includes carrier, base, frame and circuit board, carrier movably install in the frame and be equipped with first group coil, circuit board fixed mounting in on the base and be equipped with the second group coil, the frame be equipped with first group coil complex first group magnetite and with the second group coil complex second group magnetite, wherein, when first group coil circular telegram with first group magnetite cooperation drive the carrier is followed the optical axis direction and is moved, when second group coil circular telegram with the second group magnetite cooperation drive the base is in the perpendicular to move on the plane of optical axis.

In one embodiment, a ball is disposed between the frame and the base such that the frame is movable relative to the base; in one embodiment, a first ball mounting groove is formed on a surface of the base facing the frame, a second ball mounting groove is formed on a surface of the frame facing the base, a ball hole is formed in a position of the circuit board corresponding to the first ball mounting groove, and the balls are disposed in the first ball groove, the second ball groove, and the ball hole.

In one embodiment, the frame defines a central opening to mate with the carrier, and a frame side and a frame corner are formed around the central opening, wherein the first set of magnets is disposed on the frame side and the second set of magnets is disposed on the frame corner.

In one embodiment, the first set of magnets includes a pair of opposing magnets disposed on opposite sides of the frame.

In one embodiment, the frame includes four frame sides and four frame corners, the four frame sides are arranged opposite to each other in pairs, and one frame corner is arranged between every two frame sides, wherein the second group of magnets are arranged at the four frame corners.

In one embodiment, a frame embedded metal sheet is arranged in the frame, and the frame embedded metal sheet is electrically connected with the first group of coils.

In one embodiment, the optical element driving mechanism further includes a weight provided to one of frame sides of the frame where the first group of magnets are not provided; in one embodiment, the weight is a third set of magnets; in one embodiment, the base is provided with a second sensor cooperating with the first and third sets of magnets to detect displacement of the carrier in a plane perpendicular to the optical axis.

In one embodiment, the base is provided with a first sensor cooperating with the first set of magnets to detect displacement of the carrier in a plane perpendicular to the optical axis.

In one embodiment, the bottom of the frame is provided with a second sensor, the side of the carrier is provided with a sensor magnet, and the second sensor is matched with the sensor magnet to detect the displacement of the carrier in the optical axis direction.

In one embodiment, the optical element driving mechanism further comprises a chip, the carrier is provided with an optical element mounting hole for mounting an optical element, the carrier side portion is formed around the optical element mounting hole, the first set of coils are arranged on the carrier side portion and are oppositely arranged, and the chip is arranged on the base and is matched with the optical element to receive light rays transmitted through the optical element.

In one embodiment, the optical element driving mechanism further comprises an upper spring and a lower spring, wherein the upper spring movably connects the upper surface of the frame with the upper surface of the carrier, and the lower spring movably connects the lower surface of the frame with the lower surface of the carrier.

The utility model discloses an optical element actuating mechanism can realize wider motion owing to the moving part that zooms is different with the moving part of optics anti-shake, realizes more excellent zooming and anti-shake effect to obtain better image quality.

Drawings

Fig. 1 is an exploded perspective view of an optical element driving mechanism according to an embodiment of the present application.

Fig. 2 is a perspective view of the frame of fig. 1.

Fig. 3 is a bottom view of the optical element driving mechanism of fig. 1 with the base and the circuit board removed.

Fig. 4 is a perspective view of the carrier of fig. 1.

Fig. 5 is a bottom view of the optical element drive mechanism of fig. 1 with the base removed showing a second set of coil arrangements within the circuit board.

Fig. 6 is a perspective view of the base of fig. 1, with a chip disposed on the surface facing the housing.

Fig. 7 is a perspective view of the circuit board of fig. 1.

Fig. 8 is a plan view of the optical element driving mechanism of fig. 1.

Fig. 9 is a cross-sectional view of the optical element driving mechanism of fig. 8 taken along line a-a.

Fig. 10 is a cross-sectional view of the optical element driving mechanism of fig. 8 taken along line B-B.

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 invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the 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 sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

The present disclosure relates generally to an optical element driving mechanism, 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. The optical element driving mechanism can comprise a carrier, a base, a frame and a circuit board, wherein the carrier is used for bearing an optical element such as a camera and movably arranged in the frame, the circuit board is fixedly arranged on the base, the carrier is provided with a first group of coils, the base is provided with a second group of coils, the frame is provided with a first group of magnets matched with the first group of coils and a second group of magnets matched with the second group of coils, the first group of magnets are matched and driven to move along the direction of an optical axis when the first group of coils are electrified so as to realize the function such as automatic focusing, and the second group of coils are matched and driven to move on a plane vertical to the optical axis so as to realize the optical anti-shake function when the second group of coils are electrified.

The application's optical element drive arrangement's motion mode is different from conventional optical element drive arrangement, and conventional optical element drive arrangement realizes optics through the motion of drive carrier along the optical axis direction and zooms, realizes optics anti-shake through the motion of drive carrier on the plane of perpendicular to optical axis, and this application then realizes optics through the motion of drive carrier along the optical axis direction and zooms, drives the chip on the base through the drive base and moves on the plane of perpendicular to optical axis and realize optics anti-shake. Because the moving part that zooms is different with the moving part of optics anti-shake, can realize wider range's motion, realize more excellent zooming and anti-shake effect to obtain better image quality.

In addition, in one embodiment of the present application, the frame is connected to the base through balls, in other words, the frame is supported on the base through balls, so that the base can achieve a wider range of movement relative to the frame and the carrier in the frame, and a better anti-shake function is achieved. In addition, the base, the frame and the carrier in the frame are connected through the balls, so that the phenomenon of hysteresis can be avoided, and the imaging device has the advantages of being stable in imaging and fast in imaging time. The balls can be made of ceramic or nonmagnetic rigid material, for example.

In addition, in an embodiment of the application, a frame embedded metal sheet is arranged in the frame, and external current is connected into the first group of coils on the base and the second group of coils on the carrier through the frame embedded metal sheet, so that the circuit structure is simplified, and the circuit cannot be influenced when the base moves.

Furthermore, for the sake of description, the present application introduces the concept of "optical axis" to indicate the direction of light propagation within an optical element, which is an abstraction and does not mean that there is an axis in a physical sense.

The optical element driving mechanism of one embodiment of the present application is described in detail below with reference to fig. 1 to 10.

Fig. 1 is an exploded perspective view of an optical element driving mechanism according to an embodiment of the present application, and referring to fig. 1, an optical element driving mechanism 100 includes a housing 10, an upper spring 21, a carrier 30, a frame 40, a frame embedded metal sheet 41, a magnet group 50, a lower spring 22, balls 60, a circuit board 70, a base 80, and a chip 90. The position of the housing 10 is defined as up, the position of the base 80 is defined as down, the light is transmitted from the housing to the base, and the direction of the light is defined as the optical axis direction.

The frame embedded metal sheet 41 is installed in the frame 40, the carrier 30 is used for mounting an optical element such as a lens and is installed in the frame 40, the upper spring 21 movably connects the upper surface of the carrier 30 with the upper surface of the frame 40, and the lower spring 22 movably connects the lower surface of the carrier 30 with the lower surface of the frame 40, where the upper surface refers to a surface facing the housing 10 and the lower surface refers to a surface facing the base 80. The magnet assembly 50 is mounted in the frame 40 and the carrier 30 is provided with a first set of coils and cooperates with at least some of the magnets in the magnet assembly 50 to drive the carrier 30 in the direction of the optical axis by the action of the magnetic field force when the coils in the carrier 30 are energized to achieve the zoom function. The circuit board 70 is fixedly mounted on a base 80, the base 80 is movably connected with the frame 40 through a ball, and the chip 90 is disposed in the base 80 and located at the bottom of the carrier 30 to be aligned with the optical element when the optical element is mounted in the carrier 30 so as to receive light transmitted through the optical element. The circuit board 70 is provided with a second set of coils which cooperate with at least some of the magnets of the magnet assembly 50 to drive the base and thus the chip to move in a plane perpendicular to the optical axis when energized, thereby achieving an optical anti-shake function.

As can be seen from the above description, the optical element driving mechanism 100 according to an embodiment of the present application realizes the zooming function by driving the carrier 30 to move along the optical axis direction, and realizes the optical anti-shake function by driving the base 80 to move and then driving the chip 90 to move, that is, the moving components for realizing the zooming function and the anti-shake function are not the same components, but are independent components, so that a wider range of movement can be realized, and more excellent zooming and anti-shake effects can be realized.

In addition, the frame embedded metal sheet 41 is arranged in the frame 40, the frame embedded metal sheet 41 is electrically connected with the first group of coils on the carrier 30, and terminals connected with the outside are arranged, so that the frame has a conductive function, a side circuit board is omitted, the overall strength of the optical element driving mechanism 100 is improved, the circuit structure is simplified, and the circuit is not influenced when the base moves. In one embodiment, the frame insert metal sheet is electrically connected to the lower spring, which is electrically connected to the first set of coils on the carrier 30. In another embodiment, the frame insert sheet metal 41 may also be in electrical communication with a second set of coils on the circuit board 70, thereby simplifying the circuitry of the overall optical element drive mechanism. Of course, those skilled in the art will appreciate that in other embodiments, the sheet metal within the frame may not be in electrical communication with the second set of coils on the circuit board 70, which are separately connected to an external power source on the circuit board 70.

Fig. 2 is a perspective view of the frame 40 of fig. 1. Referring to fig. 2, the frame 40 is formed as a substantially rectangular frame, wherein an opening 42 is formed in the middle thereof for mounting the carrier 30, four sides 43 and four corners 44 are formed around the opening 42, the four sides 43 are arranged opposite to each other two by two, and one corner 44 is disposed between each two adjacent sides 43.

Fig. 3 is a bottom view of the optical element driving mechanism 100 of fig. 1 with the base and the circuit board removed. As shown in fig. 3, the magnet group 50 includes a first group of magnets 51, a second group of magnets 52, and a third group of magnets 53. The first group of magnets 51 is mounted on two of the opposite side portions 43 of the frame 40, the second group of magnets 52 is mounted on the four corner portions 44 of the frame 40, and the third group of magnets 53 is mounted on one of the side portions 43 of the frame 40 on which the first group of magnets 51 is not mounted.

In one embodiment, referring to fig. 2, the inner walls of the three side portions 43, i.e., the side walls facing the opening 42, are provided with side magnet mounting grooves 431, the first group of magnets 51 and the third group of magnets 53 are mounted in the side magnet mounting grooves 431, the inner side of each corner portion 44 is provided with a corner magnet mounting groove 441, and the second group of magnets 52 are mounted in the corner magnet mounting grooves 441.

Referring back to fig. 1, both the upper spring 21 and the lower spring 22 comprise a first part fixed to the carrier and a second part fixed to the frame, which are connected by a connection, which may be formed, for example, by a bent connection, so that the first part and the second part can move relative to each other. It should be noted that the upper spring 21 and the lower spring 22 shown in fig. 1 are only an example, and other ways of movably connecting the upper surface of the carrier and the upper surface of the frame and movably connecting the lower surface of the frame and the lower surface of the carrier can be applied to the optical element driving mechanism 100 of the present embodiment.

Fig. 4 is a perspective view of the carrier 30 of fig. 1. As shown in fig. 4, the carrier 30 is provided with optical element mounting holes 31 in the inside, carrier sides 32 are formed around the optical element mounting holes 31, a first set of coils 33 is provided on one of the opposite carrier sides 32, the first set of coils 33 are engaged with a first set of magnets 51 mounted on the frame 40, and the carrier 30 is driven by a magnetic field to move in the optical axis direction when energized, so as to realize a zoom function.

Fig. 5 is a bottom view of the optical element drive mechanism of fig. 1 with the base removed showing a second set of coil arrangements within the circuit board. As shown in fig. 5, the circuit board 70 has a circuit board opening 71 formed in the middle thereof, four circuit board sides 72 and four circuit board corners 73 formed around the circuit board opening 71, the four circuit board sides 72 being opposed to each other two by two, one circuit board corner 73 being formed between each two circuit board sides 72, and the second group of coils 74 being arranged on the four circuit board sides 72 and the four circuit board corners 73. Specifically, in one embodiment, one second coil 74 is disposed per circuit board side 72 and per circuit board corner 73. The second group of coils 74 cooperates with the first group of magnets 51, the second group of magnets 52 and the third magnet 53 mounted on the frame 40, and drives the circuit board 70 and thus the base 80 and the chip 90 to move on a plane perpendicular to the optical axis by the action of ampere force when energized, thereby achieving the optical anti-shake function.

It should be noted that although in the present embodiment, the second coils 74 are disposed on both the four circuit board sides 72 and the four circuit board corners 73 of the circuit board 70, in other embodiments, the second coils 74 may be disposed only on a part of the circuit board sides and/or a part of the circuit board corners. For example, in one embodiment, the second coil 74 is disposed at a pair of opposing circuit board sides 72, in another embodiment, the second coil 74 is disposed at a diagonal pair of opposing circuit board corners 73, in one embodiment, the second coil 74 is disposed at four circuit board sides 72, and in another embodiment, the second coil 74 is disposed at four circuit board corners 73. It should be noted that these embodiments are only illustrative of some arrangements of the second coil 74, and those skilled in the art can set other arrangements of the second coil 74 in the circuit board 70 based on these teachings, which are not exhaustive here.

Fig. 6 is a perspective view of the base 80 of fig. 1, which is provided with a chip 90 at the middle of a surface facing the housing 10, a plurality of first ball mounting grooves 81 are provided around the chip 90 for mounting the balls 60, and correspondingly, a plurality of second ball mounting grooves are provided at the bottom of the frame 40, which cooperate with the first ball mounting grooves 81 to mount the balls 60, thereby movably coupling the frame 40 with the base 80.

Fig. 7 is a perspective view of the circuit board 70 of fig. 1, and referring to fig. 7, a ball hole 75 is formed in the circuit board 70 at a position corresponding to a first ball mounting groove 81 of a base 80, and when the circuit board 70 is mounted on the base 80, the ball hole 75 is engaged with the first ball mounting groove 81, so that the ball 60 can be placed in the first ball groove 81 of the base 80 through the ball hole 75 of the circuit board. In the present embodiment, a total of four balls 60 are provided, and the first ball grooves 81 are provided at four corners of the base 80, and by setting the depth and size of the first ball grooves 81, the balls 60 can smoothly move in the first ball grooves 81. However, it will be appreciated by those skilled in the art that other numbers of balls may be provided, such as eight balls in one embodiment, for example, evenly disposed on four sides of the base 80, and eight balls in another embodiment, four of the eight balls disposed on four sides of the base 80 and four disposed on four corners of the base 80. It should be noted that these embodiments are merely exemplary numbers and exemplary arrangements of balls, and those skilled in the art can also set other numbers and arrangements of balls according to these indications, and for the sake of brevity, they are not enumerated here.

Referring back to fig. 6, the surface of the base plate 80 facing the housing is further provided with a plurality of first sensors 82, the plurality of first sensors 82 being mounted around the chip 90, and specifically, in one embodiment, as shown in fig. 6, a total of three first sensors 82 are provided on the base plate 80, the three first sensors 82 being arranged around the chip 90 on three outer sides of the chip 90, the first sensors 82 on each side being provided between two first ball grooves 81. When the frame 40 is mounted on the base 80, the first sensor 82 is located below the first group of magnets 51 and the third group of magnets 53 on the frame 40, so as to cooperate with the first group of magnets 51 and the third group of magnets 53 to detect the displacement of the carrier 30, for example, detect the displacement of the carrier 30 moving on a plane perpendicular to the optical axis, and transmit the displacement information to the control module, and the control module controls the base 80 to drive the chip 90 to move in the direction perpendicular to the optical axis by controlling the current in the second group of coils according to the information, so as to implement the optical anti-shake function. It should be noted that in other embodiments, more than three or three first sensors 82 may be provided, for example, only one first sensor 82 may be provided, and the first sensor 82 may be located below the first group of magnets 51 or the second group of magnets 53. In another embodiment, only two first sensors 82 may be provided, with the two first sensors 82 being disposed below a pair of first group of magnets 51, or below one of the first group of magnets 51, and below the third group of magnets 53. Other numbers and arrangements of the first sensors may be provided by those skilled in the art, and are not listed here.

Fig. 8 is a plan view of the optical element driving mechanism 100 of fig. 1, fig. 9 is a sectional view taken along line a-a of fig. 8, and fig. 10 is a sectional view taken along line B-B of fig. 8. Referring to fig. 8-10, a groove 45 is formed at the bottom of the frame 40, a second sensor 46 is disposed in the groove 45, correspondingly, a sensor magnet 34 is disposed at a position of the carrier 30 corresponding to the groove 45, the sensor magnet 34 cooperates with the second sensor 46 to detect a displacement of the carrier 30, for example, a displacement of the carrier 30 along the optical axis, and transmit the displacement information to a control module, for example, which controls the carrier 30 to move along the optical axis by controlling the current in the first set of coils 82 on the carrier 30, so as to realize functions such as auto-focusing. For example, as shown in fig. 10, the first group of magnets 51 includes a pair of magnets arranged oppositely and cooperates with a pair of first group of coils 33 arranged oppositely on the carrier 30, and when the first group of coils 33 is energized, the magnetic field generated by the first group of magnets 51 drives the carrier 30 to move in the optical axis direction. This embodiment facilitates assembly and maintenance of the optical element drive mechanism by providing a second sensor 46 at the bottom of the frame 40.

The preferred embodiments of the present invention have been described in detail, but it should be understood that various changes and modifications can be made by those skilled in the art after reading the above teaching of the present invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (11)

1. The utility model provides an optical element actuating mechanism, its characterized in that, optical element actuating mechanism includes carrier, base, frame and circuit board, the carrier movably install in the frame and be equipped with first group coil, circuit board fixed mounting in on the base and be equipped with second group coil, the frame be equipped with first group's coil complex magnetite and with second group's coil complex second group magnetite, wherein, when first group coil circular telegram with first group's magnetite cooperation drive the carrier is followed the motion of optical axis direction, when second group coil circular telegram with second group's magnetite cooperation drive the base is in the perpendicular to move on the plane of optical axis.

2. An optical element drive mechanism as claimed in claim 1, wherein balls are provided between the frame and the base such that the frame is movable relative to the base.

3. The optical element driving mechanism according to claim 1, wherein said frame is provided with a central opening to cooperate with said carrier, a frame side and a frame corner being formed around said central opening, wherein said first group of magnets is provided at said frame side and said second group of magnets is provided at said frame corner.

4. The optical element driving mechanism according to claim 3, wherein said first group of magnets includes a pair of opposed magnets provided at opposite side portions of said frame.

5. The optical element driving mechanism according to claim 1, wherein said frame includes four of said frame sides and four of said frame corners, said four frame sides being disposed opposite to each other two by two, and one of said frame corners being disposed between each two of said frame sides, wherein said second group of magnets is disposed at said four frame corners.

6. An optical element driving mechanism according to claim 1, wherein a frame embedded metal sheet is provided in the frame, and the frame embedded metal sheet is electrically connected to the first group of coils.

7. The optical element driving mechanism according to claim 4, further comprising a weight provided to a side of the frame on which one of the first group of magnets is not provided.

8. An optical element driving mechanism according to claim 1, wherein the base is provided with a plurality of first sensors which cooperate with the first group of magnets to detect displacement of the carrier in a plane perpendicular to the optical axis.

9. The optical element driving mechanism according to claim 8, wherein a second sensor is provided at a bottom of the frame, a sensor magnet is provided at a side of the carrier, and the first sensor cooperates with the sensor magnet to detect displacement of the carrier in the optical axis direction.

10. The optical element driving mechanism according to claim 1, further comprising a chip, wherein the carrier is provided with an optical element mounting hole for mounting an optical element, the carrier side portion is formed around the optical element mounting hole, the first group of coils are provided on the carrier side portion and arranged oppositely, and the chip is provided on the base and cooperates with the optical element to receive light transmitted through the optical element.

11. The optical element driving mechanism according to claim 1, further comprising an upper spring movably connecting an upper surface of the frame with an upper surface of the carrier and a lower spring movably connecting a lower surface of the frame with a lower surface of the carrier.

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