阅读说明：本技术 光学元件驱动装置 (Optical element driving device ) 是由 汪仁德 鲍和平 彭坤 林聪� 刘富泉 吕新科 其他发明人请求不公开姓名 于 2021-09-23 设计创作，主要内容包括：本发明公开了一种光学元件驱动装置,包括盖体、载体、悬吊件、上簧片、下簧片、弹性支撑件、基座以及防抖平台,上簧片将载体的上表面与基座或盖体可活动连接,下簧片将载体的下表面与基座可活动连接,悬吊件的一端与上簧片固定连接,悬吊件的另一端与防抖平台固定连接,基座设有磁石组,载体设有与磁石组配合的第一线圈,防抖平台设有与磁石组配合的第二线圈,以及弹性支撑件包括设置于防抖平台底部的第一部分和设置于基座底部的第二部分。本发明的光学元件驱动机构由于变焦的运动部件与光学防抖的运动部件不同,可以实现更大范围的运动,实现更优异的变焦和防抖效果,从而获得更好的成像质量。(The invention discloses an optical element driving device which comprises a cover body, a carrier, a suspension piece, an upper reed, a lower reed, an elastic supporting piece, a base and an anti-shaking platform, wherein the upper reed movably connects the upper surface of the carrier with the base or the cover body, the lower reed movably connects the lower surface of the carrier with the base, one end of the suspension piece is fixedly connected with the upper reed, the other end of the suspension piece is fixedly connected with the anti-shaking platform, the base is provided with a magnet group, the carrier is provided with a first coil matched with the magnet group, the anti-shaking platform is provided with a second coil matched with the magnet group, and the elastic supporting piece comprises a first part arranged at the bottom of the anti-shaking platform and a second part arranged at the bottom of the base. The optical element driving mechanism of the invention 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.)

1. An optical element driving device, comprising a cover, a carrier, a suspension member, an upper spring, a lower spring, an elastic support member, a base, and an anti-shake platform,

the upper reed movably connects the upper surface of the carrier with the base or the cover body, the lower reed movably connects the lower surface of the carrier with the base,

one end of the suspension piece is fixedly connected with the upper reed, the other end of the suspension piece is fixedly connected with the anti-shake platform,

the base is equipped with magnet group, the carrier be equipped with magnet group complex first coil, the anti-shake platform be equipped with magnet group complex second coil, and

the elastic supporting piece comprises a first part arranged at the bottom of the anti-shake platform and a second part arranged at the bottom of the base.

2. An optical element driving device according to claim 1, wherein said second portion of said elastic support member is provided with an outwardly extending extension portion through which an external circuit is connected.

3. An optical element driving device according to claim 2, wherein the extension portion extends downward from a bottom of the second portion by a predetermined distance and then bends outward to form a first support portion, and a side portion of the elastic support member opposite to the extension portion is provided with a second support portion extending downward, the second support portion being connected to and lower than the first portion and the second portion.

4. An optical element driving device according to claim 3, wherein a side of the second portion corresponding to the extension portion is provided with a first groove, and a side of the second portion corresponding to the second support portion is provided with a second groove.

5. The optical element driving device as claimed in claim 1, wherein four corners of the base are provided with a magnet mounting groove and a suspension avoiding groove, the suspension avoiding groove is disposed outside the magnet mounting groove, the magnet group is disposed in the magnet mounting groove, and the suspension passes through the suspension avoiding groove and is fixedly connected to the upper spring and the anti-shake platform at two ends thereof.

6. An optical element driving device as claimed in claim 1, wherein the base forms a cavity at a bottom thereof, the anti-shake table is movably mounted in the cavity, and the second portion of the resilient support extends into the cavity and is disposed along a sidewall of the cavity.

7. The optical element driving device according to claim 1, further comprising a housing, wherein the base is provided with a step which is engaged with the housing, and the housing is mounted on the step and forms an accommodation space therein.

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

9. The optical element driving apparatus as claimed in claim 1, wherein the anti-shake platform is formed in a rectangular structure and has a central opening at a central portion thereof, the central opening is circular and is engaged with the lens, suspension fixing holes are formed around four corners of the central opening, and a lower end of the suspension is fixedly connected to the suspension fixing holes.

10. 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.

11. 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.

Technical Field

The invention 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.

Disclosure of Invention

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-mentioned problems, according to an aspect of the present invention, there is provided an optical element driving apparatus including a cover, a carrier, a suspension, an upper spring, a lower spring, an elastic support, a base, and an anti-shake table,

the upper reed movably connects the upper surface of the carrier with the base or the cover body, the lower reed movably connects the lower surface of the carrier with the base,

one end of the suspension piece is fixedly connected with the upper reed, the other end of the suspension piece is fixedly connected with the anti-shake platform,

the base is provided with a magnet group, the carrier is provided with a first coil matched with the magnet group, the anti-shake platform is provided with a second coil matched with the magnet group,

the elastic supporting piece comprises a first part arranged at the bottom of the anti-shake platform and a second part arranged at the bottom of the base.

In one embodiment, the second portion of the resilient support is provided with an outwardly extending extension through which to connect with an external circuit.

In one embodiment, the extension portion extends downwards from the bottom of the second portion for a certain distance and then bends outwards to form a first supporting portion, a side portion of the elastic supporting member opposite to the extension portion is provided with a second supporting portion extending downwards, and the second supporting portion is connected with the first portion and the second portion and is lower than the first portion and the second portion.

In one embodiment, a side portion of the second portion corresponding to the extension portion is provided with a first groove, and a side portion of the second portion corresponding to the second support portion is provided with a second groove.

In one embodiment, four corners of the base are provided with a magnet installation groove and a suspension piece avoiding groove, the suspension piece avoiding groove is arranged outside the magnet installation groove, the magnet group is arranged in the magnet installation groove, and the suspension piece penetrates through the suspension piece avoiding groove and is fixedly connected with the upper spring plate and the anti-shake platform at two ends respectively.

In one embodiment, the bottom of the base forms a cavity, the anti-shake platform is movably mounted in the cavity, and the second portion of the resilient support extends into the cavity and is disposed along a sidewall of the cavity.

In one embodiment, the optical element driving apparatus further includes a housing, the base being provided with a step to be fitted with the housing, the housing being mounted on the step and forming an accommodating space therein.

In one embodiment, a base embedded metal sheet is further arranged in the base, and the base embedded metal sheet is provided with an electronic component mounting part.

In one embodiment, the anti-shake platform forms a rectangular structure and is provided with a central opening in the middle, the central opening is circular and is matched with the lens, suspension fixing holes are arranged around four end corners of the central opening, and the lower end of the suspension is fixedly connected in the suspension fixing holes.

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

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.

The optical element driving mechanism of the invention 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. In addition, through the three-dimensional circuit design of elastic support piece for the circuit is walked line more high-efficiently succinctly, and has the function that supplementary anti-shake platform resets.

Drawings

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

Fig. 2 is a perspective view of a resilient support of one embodiment of the present invention.

Fig. 3 is a perspective view of a base of one embodiment of the present invention.

FIG. 4 is another perspective view of the base of one embodiment of the present invention showing the bottom of the base.

Fig. 5 is a perspective view of an anti-shake platform according to an embodiment of the present invention.

Fig. 6 is a sectional view 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 invention 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 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. This optical element drive arrangement can include the lid, the carrier, suspend the piece in midair, go up the reed, lower reed, elastic support spare, base and anti-shake platform, the carrier is used for installing optical element, it is with the upper surface and base or lid swing joint of carrier to go up the reed, lower reed is with the lower surface and the base swing joint of carrier, suspend the one end and last reed fixed connection of piece in midair, the other end and anti-shake platform fixed connection, the base is equipped with the magnet group, the carrier be equipped with magnet group complex first coil, anti-shake platform be equipped with magnet group complex second coil, and elastic support spare is used for connecting external circuit and including setting up in the first part of anti-shake platform bottom and setting up in the second part of base bottom. When the first group of coils is electrified, the first group of coils and the magnet group are matched to drive the carrier to move along the direction of the optical axis so as to realize functions such as automatic focusing, and when the second group of coils is electrified, the second group of coils and the magnet group are matched to drive the motion platform to move on a plane vertical to the optical axis so as to realize an optical anti-shake function.

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.

For convenience of description, the present application introduces the concept of "optical axis" to refer to 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 a perspective view of an optical element driving apparatus according to an embodiment of the present invention. As shown in fig. 1, the optical element driving apparatus 100 includes a cover 10, a carrier 20, a suspension 30, an upper spring 41, a lower spring 42, an elastic support 50, a base 60, and an anti-shake platform 70. The upper spring 41 movably connects the upper surface of the carrier 20 with the upper surface of the base 60, and the lower spring 42 movably connects the lower surface of the carrier 20 with the lower surface of the base 60. Of course, in other embodiments, the upper spring 41 may movably connect the upper surface of the carrier 20 with the cover 10. One end of the suspension 30 is fixedly connected to the upper spring 41, and the other end of the suspension 30 is fixedly connected to the anti-shake platform 70, so that the anti-shake platform 70 is suspended on the base 60 or the cover 10 by the suspension 30. The base 60 is provided with a magnet group 61, the carrier 20 is provided with a first coil 21 matched with the magnet group 61, the anti-shake platform 70 is provided with a second coil (not shown) matched with the magnet group 61, the elastic support 50 comprises a first part 51 and a second part 52, the first part 51 is arranged at the bottom of the anti-shake platform 70, and the second part 52 extends into the base 70 and is arranged along the inner wall of the bottom of the base 70.

An imaging chip (not shown) is fixedly disposed at the bottom of the anti-shake platform 70, and when the first coil 21 of the carrier 20 is energized, the first coil 21 drives the carrier 20 to move relative to the base 60 along the optical axis direction under the action of the magnetic field force of the magnet set 61, so as to implement an optical zoom function. When setting up in the circular telegram of anti-shake platform 70 second coil, the second coil is in the magnetic field force effect of magnet group 61 down and then drives the imaging chip motion of fixed connection in the anti-shake platform 70 bottom as moving anti-shake platform 70, realizes optics anti-shake function.

The elastic support member 50 of the present invention functions as a stereoscopic circuit, which electrically connects an external circuit with the imaging chip.

Fig. 2 is a perspective view of a resilient support 50 according to one embodiment of the present invention. As shown in fig. 2, in one embodiment, the elastic supporting member 50 includes a first portion 51 and a second portion 52, the first portion 51 is disposed at the bottom of the anti-shake platform 70 and is fixedly connected to the imaging chip, the second portion 52 forms a rectangular frame structure and extends into the bottom cavity 68 of the base 60 and is disposed around the inner wall of the cavity 68 of the base 60, and the second portion 52 is further provided with an extending portion 521 extending outward and connected to an external circuit through the extending portion 521. When the optical element driving apparatus of the present invention is disposed inside a device such as a mobile phone, the extension portion 521 of the elastic supporting member 50 is fixedly connected to a main board of the device such as a mobile phone, the first portion 51 of the elastic supporting member 50 is fixedly connected to the anti-shake platform 70 by being fixedly connected to the imaging chip, and the elastic force of the elastic supporting member 50 can also assist the anti-shake platform 70 to reset during the anti-shake motion of the anti-shake platform.

Optionally, the extension 521 extends downwards from the bottom of the second portion 52 for a certain distance and then bends outwards, that is, the extension 521 is lower than the second portion 52 and the first portion 51, so as to support the whole elastic support.

Optionally, a side opposite to the extension 521 is provided with a second support portion 522 extending downward, and the second support portion 522 is connected to the first portion 51 and the second portion 52 and is lower than the first portion 51 and the second portion 52, so as to support the entire elastic support 50. That is, the extension portion 521 constitutes a first support portion and cooperates with the second support portion 522 to support the entire elastic support member 50.

Alternatively, a side of the second portion 52 corresponding to the extension 521 is provided with a first groove 524, and a side of the second portion corresponding to the second support 522 is provided with a second groove 523. The elastic deformability of the second portion is increased by the first groove 524 and the second groove 523.

Fig. 3 is a perspective view of the base 60 of one embodiment of the present invention, and fig. 4 is another perspective view of the base 60 of one embodiment of the present invention, showing the bottom of the base 60. Referring to fig. 3 to 4, in one embodiment, the base 60 is formed in a rectangular structure at the bottom thereof and provided with magnet mounting grooves 63 at four corners thereof, and the magnet groups 61 are disposed in the magnet mounting grooves 62. Two opposite side parts are provided with upper reed outer ring mounting parts 64, the upper reed mounting parts 64 are provided with grooves 641, and two sides of the grooves 641 are provided with outer rings of the fixed columns 642 for fixing the upper reeds 41. Optionally, suspension piece avoiding grooves 65 are further formed in four corners of the base 60, the suspension piece 30 penetrates through the suspension piece avoiding grooves 65 and is fixedly connected to the upper spring 41 and the anti-shake platform 70 at two ends, and optionally, the suspension piece avoiding grooves 64 are formed in the outer side of the magnet mounting groove 62.

The bottom of the base 60 forms a cavity 68, the anti-shake platform 70 is movably mounted in the cavity 68, and the second portion 52 of the resilient support 50 extends into the cavity 68 of the base 60 and is disposed along a sidewall of the cavity 68.

In one embodiment, referring to fig. 1, the optical element driving apparatus 100 further includes a housing 80, the bottom of the base 60 is provided with a step 66 matched with the housing 80, and the housing 80 is mounted on the step 66 and forms a receiving space for mounting other components of the optical element driving apparatus.

In one embodiment, a base embedded metal sheet 67 is further provided in the base 60, the base embedded metal sheet 67 is provided in the base 60 and provided with an electronic component mounting portion 671 on which an electronic component such as a sensor or the like is mounted, and the base embedded metal sheet 67 functions both to reinforce the strength of the base 60 and to connect an external circuit with the electronic component such as the sensor.

Fig. 5 is a perspective view of an anti-shake platform 70 according to an embodiment of the present invention. As shown in fig. 5, in one embodiment, the anti-shake platform 70 is disposed at the bottom of the base 60 and is used for driving the imaging chip to move so as to implement an optical anti-shake function. The anti-shake platform 70 is formed in a rectangular structure as a whole, and has a central opening 71 in the middle, the central opening 71 is circular and is matched with the lens, the central opening 71 corresponds to the imaging chip, and light transmitted through the lens is incident on the imaging chip through the central opening 71. The anti-shake platform 70 has suspension fixing holes 72 at four corners, and the suspension 30 is fixed in the suspension fixing holes 72 at the lower end thereof. The outer side wall of the anti-shake platform 70 is further provided with an anti-collision piece 73, which prevents the anti-shake platform 70 from directly contacting with the base in the movement process, and plays a role in protecting the anti-shake platform 70.

With continued reference to fig. 1, the four corners of the upper spring plate 41 are provided with suspension connecting portions 411, and the suspension connecting portions 411 are fixedly connected to one end of the suspension 50.

In one embodiment, as shown in fig. 1, the optical element driving apparatus 100 further includes a Flexible Printed Circuit (FPC)90, the FPC 90 is fixedly disposed on the anti-shake platform 70 and is provided with a second coil, and the second coil cooperates with the magnet assembly 60 to realize the anti-shake function.

Fig. 6 is a sectional view of a lens driving apparatus 100 according to an embodiment of the present invention. As shown in fig. 6, the anti-shake platform 70 is disposed in the bottom chamber of the base 60 and connected to the upper reed 41 through the suspension 30, the magnet set 61 is mounted in the magnet groove of the base 60, the carrier 20 is disposed in the base 60 and provided with the first coil 21, the first coil 21 is disposed inside the magnet set 61 and is in face-to-face fit with the magnet set 61, the flexible circuit board 90 is fixedly mounted on the upper surface of the anti-shake platform 70, the flexible circuit board 90 is provided with the second coil 73, the second coil 73 is disposed below the magnet set 61 and is correspondingly matched with the lower surface of the magnet set 61, that is, in the present invention, the magnet set 61 is matched with the first coil 21 to drive the carrier to move along the optical axis direction to realize the optical zoom function, and is matched with the second coil 73 to drive the anti-shake platform 70 to drive the imaging chip to move to realize the optical anti-shake function, and the arrangement and design of each component are ingenious, the magnets are saved and the occupied space is reduced, so that the whole optical element driving device has a small and exquisite structure.

In one embodiment, the external current may reach the flexible circuit board 90 through the elastic support member, and then enter the lead-in second coil 73, and the lead-in upper spring 41 through the suspension member 30, and then the lead-in first coil 31 of the carrier 30 through the upper spring 41, and may lead in the base embedded metal sheet 67 through the upper spring, and further lead in the electronic component such as a sensor through the electronic component mounting portion.

It should be noted that this manner of current transfer is merely an example, and in other embodiments, current may be transferred through a variety of paths.

Furthermore, although in the above-described embodiment, the second coil 73 is disposed within the flexible circuit board, in other embodiments, the second coil 73 may be disposed directly within the anti-shake platform 70.

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 invention can be effected therein by those skilled in the art after reading the above teachings of the invention. Such equivalents are intended to fall within the scope of the claims appended hereto.