CN216083224U - Optical element driving device - Google Patents

Abstract

The utility model discloses an optical element driving device which comprises a carrier, a frame, an anti-shake platform and a sensor line group, wherein the sensor line group comprises a horizontal part and a folding part, the horizontal part is fixedly connected with the anti-shake platform, the folding part is arranged outside the anti-shake platform and is used for being connected with an external circuit, the carrier is used for mounting an optical element and is provided with a first coil, the anti-shake platform is used for mounting an imaging chip and is provided with a second coil, the frame is provided with a magnet group, the first coil and the magnet group are matched to drive the carrier to move, and the second coil and the magnet group are matched to drive the anti-shake platform to move. The optical element driving device can realize a wider range of movement and more excellent zooming and anti-shake effects because the zooming movement part is different from the optical anti-shake movement part, thereby obtaining better imaging quality.

Description

Optical element driving device

Technical Field

The utility model relates to the field of optical drive, in particular to an optical element driving device.

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

It is an object of the present invention to provide an optical element driving device to solve the above-mentioned problems of the prior art.

In order to solve the above problem, according to one aspect of the present invention, there is provided an optical element driving apparatus, comprising a carrier, a frame, an anti-shake platform, and a sensor circuit group, wherein the sensor circuit group comprises a horizontal portion and a folded portion, the horizontal portion is fixedly connected to the anti-shake platform, the folded portion is disposed outside the anti-shake platform and is used for connecting an external circuit, the carrier is used for mounting an optical element and is provided with a first coil, the anti-shake platform is used for mounting an imaging chip and is provided with a second coil, the frame is provided with a magnet group, the first coil is matched with the magnet group to drive the carrier to move, and the second coil is matched with the magnet group to drive the anti-shake platform to move.

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

In one embodiment, the optical element driving apparatus further includes a plurality of balls, the anti-shake platform is provided with a lower ball mounting groove, and the bottom of the frame is provided with an upper ball mounting groove which is matched with the lower ball mounting groove to mount the balls and enable the frame to move relative to the anti-shake platform.

In one embodiment, the frame includes a first portion provided with a carrier mounting hole around which a plurality of magnet mounting grooves are formed, the magnet group being mounted in the magnet mounting groove, and a second portion opened downward and engaged with the folded portion of the sensor line group.

In one embodiment, a bottom of the first portion of the frame forms a cavity in which the anti-shake platform is movably mounted.

In one embodiment, the optical element driving device further includes a flexible circuit board, the flexible circuit board is fixedly disposed on the anti-shake platform and is provided with the second coil, and the second coil is matched with the magnet assembly to drive the anti-shake platform to move.

In one embodiment, the outer side wall of the anti-shake platform is further provided with an anti-collision piece.

In one embodiment, the frame is also provided with a frame embedded metal sheet, and the frame embedded metal sheet is provided with an electronic component mounting part.

In one embodiment, the optical element driving device further comprises a housing fitted with and mounted on the first portion of the frame.

In one embodiment, the optical element driving device further comprises a patch having a shape matching the sensor line set and fixing the sensor line set to the bottom of the frame.

The optical element driving device can realize a wider range of movement and more excellent zooming and anti-shake effects because the zooming movement part is different from the optical anti-shake movement part, thereby obtaining better imaging quality.

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 a frame of one embodiment of the present invention.

Fig. 3 is a bottom view of the frame of one embodiment of the present invention.

Fig. 4 is a top view of the anti-shake platform and sensor line set according to an embodiment of the utility model after assembly.

Figure 5 is a side view of an assembled anti-shake platform and sensor line set according to one embodiment of the utility model.

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.

The present disclosure relates generally to an optical element driving apparatus, 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. This optical element drive arrangement can include the carrier, the frame, anti-shake platform and sensor line group, sensor line group includes horizontal part and folding part, horizontal part and anti-shake platform fixed connection, folding part sets up in the outside of anti-shake platform and is used for connecting external circuit, the carrier is used for installing optical element and is equipped with first coil, the anti-shake platform is used for installing imaging chip and is equipped with the second coil, the frame is equipped with magnet group, first coil and magnet group cooperation drive carrier motion, the second coil and the motion of magnet group cooperation drive anti-shake platform. For example, when the first coil is electrified, the first coil cooperates with the magnet group to drive the carrier to move along the optical axis direction so as to realize functions such as automatic focusing, and when the second coil is electrified, the second coil cooperates with the magnet group to drive the anti-shake platform to move on a plane perpendicular to the optical axis so as to realize optical anti-shake functions.

The application's optical element drive arrangement's motion mode is different from conventional optical element drive arrangement, conventional optical element drive arrangement realizes optics through the motion of drive carrier along the optical axis direction and zooms, realize 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, through the motion realization optics anti-shake of imaging chip on the drive anti-shake platform on the plane of perpendicular to optical axis of drive anti-shake platform. 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 an embodiment of the present application, the frame is connected to the anti-shake platform through balls, in other words, the frame is supported on the anti-shake platform through balls, so that the anti-shake platform can realize a wider range of movement relative to the frame and the carrier in the frame, and a better anti-shake function is realized. 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.

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.

Fig. 1 is an exploded perspective view of a lens driving apparatus 100 according to an embodiment of the present invention. As shown in fig. 1, the optical element driving apparatus 100 includes a carrier 10, a frame 20, an anti-shake platform 30, and a sensor line group 40. The sensor circuit group 40 includes a horizontal portion 41 and a folded portion 42, the horizontal portion 41 is fixedly connected to the anti-shake platform 30, the folded portion 42 is disposed outside the anti-shake platform 30 and is used for connecting to an external circuit, such as a main board of a mobile phone, the carrier 10 is used for mounting an optical element (not shown) and is provided with a first coil 11, the anti-shake platform 30 is used for mounting an imaging chip (not shown) and is provided with a second coil, the frame 20 is provided with a magnet group 50, the first coil 11 and the magnet group 50 cooperate to drive the carrier 10 to move, such as move along an optical axis direction, so as to implement an optical zoom function, and the second coil and the magnet group 50 cooperate to drive the anti-shake platform 30 to move, such as move on a plane perpendicular to the optical axis, so as to implement the optical anti-shake function.

In one embodiment, as shown in fig. 1, the optical element driving apparatus further comprises an upper spring 61 and a lower spring 62, the upper spring 61 movably connects the upper surface of the frame 20 with the upper surface of the carrier 10, and the lower spring 62 movably connects the lower surface of the frame 20 with the lower surface of the carrier 10. For example, the upper spring 61 includes a carrier upper surface connecting portion 611, a frame upper surface connecting portion 612, and a first elastic bar 613, the first elastic bar 613 movably connects the carrier upper surface connecting portion 611 and the frame upper surface connecting portion 612, the carrier upper surface connecting portion 611 is fixedly connected to the upper surface of the carrier 10, and the frame upper surface connecting portion 612 is fixedly connected to the upper surface of the frame 20, thereby movably connecting the carrier 10 and the frame 20. Similarly, the lower spring plate 62 comprises a carrier lower surface connecting portion 621, a frame lower surface connecting portion 622, and a second elastic strip 623, wherein the second elastic strip 623 movably connects the carrier lower surface connecting portion 621 and the frame lower surface connecting portion 622, the carrier lower surface connecting portion 621 is fixedly connected to the lower surface of the carrier 10, and the frame lower surface connecting portion 622 is fixedly connected to the lower surface of the frame 20, so that the carrier 10 and the frame 20 are movably connected.

In one embodiment, the optical element driving apparatus 100 further includes a plurality of balls 70, the anti-shake platform 30 is provided with a lower ball mounting groove 31, and correspondingly, the bottom of the frame 20 is provided with an upper ball mounting groove, which is matched with the lower ball mounting groove 31 of the anti-shake platform 30 to mount the balls 70, that is, the balls 70 are disposed between the frame 20 and the anti-shake platform 30 and connected through the balls 70, so that the frame 20 can move relative to the anti-shake platform 30. Through the ball connection between frame and the anti-shake platform, the anti-shake platform can realize wider range's motion for the carrier in frame and the frame, realizes better anti-shake function, and in addition, the ball still has bigger bearing capacity, can bear heavier frame and carrier. 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.

Alternatively, the balls may be made of, for example, ceramic or a nonmagnetic rigid material.

Fig. 2 is a perspective view of a frame 20 according to an embodiment of the present invention, and fig. 3 is a bottom view of the frame according to the embodiment of the present invention, and as shown in fig. 2 to 3, the frame 20 includes a first portion 21 and a second portion 22 which are integrally formed, the first portion 21 is provided with a carrier mounting hole 211, a carrier 10 is mounted in the carrier mounting hole 211, a plurality of magnet mounting grooves 212 are formed around the carrier mounting hole 211, and a magnet group 50 is mounted in the magnet mounting groove 212. Alternatively, the first part 21 is formed in a rectangular shape as a whole, the magnet mounting grooves 212 are provided at four corners of the first part 21, and the second part 22 is opened downward and fitted with the folded part 42 of the sensor line group 40. The folder 42 is folded in multiple layers and stacked at a certain height, and when one end of the folder 42 is connected to an external device such as a main board of a mobile phone, the folder 42 may assist the anti-shake platform 30 to be reset during movement. Optionally, the corner portion of the first portion 21 of the frame 20 is further provided with an upper ball mounting groove 213, and optionally, the upper ball mounting groove 213 is provided outside the magnet mounting groove 212.

In one embodiment, the first portion 21 of the frame 20 is further provided with an upper spring mounting portion 214, a middle portion of the upper spring mounting portion 214 is provided with a recess 215 depressed downward, and an upper spring frame connecting portion of the upper spring 61 is mounted on the upper spring mounting portion 214.

Alternatively, each corner portion of the first portion 21 of the frame 20 is provided with one magnet mounting groove 212 and one ball mounting groove 213.

In one embodiment, the bottom of the first portion 21 of the frame 20 forms a cavity (not shown) in which the anti-shake platform 30 is movably mounted.

Referring back to fig. 1, the optical element driving apparatus 100 further includes a flexible circuit board 80, the flexible circuit board 80 is fixedly disposed on the anti-shake platform 30 and is provided with a second coil (not shown), and the second coil cooperates with the magnet assembly 50 to drive the anti-shake platform 30 and further drive the imaging chip (not shown) to move, so as to implement an anti-shake function.

Fig. 4 is a plan view of an assembly formed by assembling the anti-shake platform 30, the sensor line group 40, the balls 70, and the flexible circuit board 80 according to an embodiment of the present invention, and fig. 5 is a side view of an assembly formed by assembling the anti-shake platform 30, the sensor line group 40, the balls 70, and the flexible circuit board 80 according to an embodiment of the present invention. As shown in fig. 4 and 5, the anti-shake platform 30 is disposed in the bottom chamber of the frame 20 and is used for driving the imaging chip to move so as to implement an optical anti-shake function. The anti-shake platform 30 is formed in a rectangular structure as a whole, a central opening 31 is formed in the middle of the anti-shake platform, the central opening 31 is circular and is matched with the lens, the central opening 31 corresponds to the imaging chip, and light transmitted through the lens enters the imaging chip through the central opening 31 to be imaged. The anti-shake platform 30 is provided with lower ball mounting holes 32 at four corners thereof, and the balls 50 are mounted in the lower ball mounting holes 32. The outer side wall of the anti-shake platform 30 is further provided with an anti-collision piece 33, so that the anti-shake platform 30 is prevented from directly contacting with the inner wall of the cavity at the bottom of the frame in the movement process, and the anti-shake platform 30 is protected.

Referring back to fig. 1, in one embodiment, a frame embedded metal sheet 23 is further provided in the frame 20, the frame embedded metal sheet 23 is provided with an electronic component mounting part 231, an electronic component such as a sensor or the like can be mounted on the electronic component mounting part 231, and the frame embedded metal sheet 23 plays a role of both reinforcing the frame structure and transmitting current and signals.

With continued reference to fig. 1, in one embodiment, the optical element driving device 100 further includes a housing 90, the housing 90 being engaged with the first portion 21 of the frame 20 and mounted on the first portion 21, the housing 90 being engaged with the first portion 21 of the frame 20 to form a space for accommodating a carrier or the like.

Optionally, the optical element driving apparatus 100 further includes a patch 91, and the patch 91 has a shape matching the sensor line group 40 and fixes the sensor line group 40 to the bottom of the frame, and plays a role of shielding light.

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 optical element driving device is characterized by comprising a carrier, a frame, an anti-shake platform and a sensor line set, wherein the sensor line set comprises a horizontal part and a folding part, the horizontal part is fixedly connected with the anti-shake platform, the folding part is arranged outside the anti-shake platform and is used for being connected with an external circuit, the carrier is used for mounting an optical element and is provided with a first coil, the anti-shake platform is used for mounting an imaging chip and is provided with a second coil, the frame is provided with a magnet set, the first coil and the magnet set are matched to drive the carrier to move, and the second coil and the magnet set are matched to drive the anti-shake platform to move.

2. The optical element driving device as claimed in 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.

3. The optical element driving apparatus as claimed in claim 1, further comprising a plurality of balls, wherein the anti-shake platform is provided with a lower ball mounting groove, and wherein the bottom of the frame is provided with an upper ball mounting groove which is engaged with the lower ball mounting groove to mount the balls and enable the frame to move relative to the anti-shake platform.

4. The optical element driving device according to claim 1, wherein the frame includes a first portion provided with a carrier mounting hole around which a plurality of magnet mounting grooves are formed, the magnet group being mounted in the magnet mounting groove, and a second portion opened downward and engaged with a folded portion of the sensor line group.

5. An optical element driving device as claimed in claim 4, wherein a bottom of the first portion of the frame forms a cavity, and the anti-shake platform is movably mounted in the cavity.

6. The optical element driving apparatus as claimed in claim 1, further comprising a flexible circuit board, wherein the flexible circuit board is fixedly disposed on the anti-shake platform and is provided with the second coil, and the second coil cooperates with the magnet assembly to drive the anti-shake platform to move.

7. The optical element driving device as claimed in claim 1, wherein an anti-collision member is further provided on an outer sidewall of the anti-shake table.

8. An optical element driving device according to claim 1, wherein a frame-embedded metal sheet is further provided in the frame, and the frame-embedded metal sheet is provided with an electronic element mounting portion.

9. An optical element driving device according to claim 4, further comprising a housing engaged with and mounted on the first portion of the frame.

10. An optical element driving device according to claim 1, further comprising a patch having a shape matching the sensor line set and fixing the sensor line set to the bottom of the frame.

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