CN216485738U

CN216485738U - Lens driving mechanism

Info

Publication number: CN216485738U
Application number: CN202122635250.0U
Authority: CN
Inventors: 祖生猛; 彭坤; 林聪�; 刘富泉; 吕新科
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Haoze Electronics Co ltd Kunshan Branch
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-05-10
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a lens driving mechanism which comprises a shell, an upper reed, a carrier, a coil component, a magnet component, a lower reed and a base, wherein the upper reed, the carrier and the lower reed are arranged in a space defined by the shell and the base. The carrier is provided with a hollow part for mounting an optical element, the coil component and the magnet component are arranged oppositely, any one of the coil component and the magnet component is arranged on the carrier, the other one of the coil component and the magnet component is fixed in a limited space, the carrier can be movably connected into the shell through the upper reed, and the carrier can be movably connected onto the base through the lower reed. The base is equipped with two at least pins, and the carrier is equipped with the installation piece, and the installation piece is fixed to be set up in the carrier bottom and follows the carrier motion, and two tip looks mutual dispositions of two at least pins are equipped with the clearance, and the installation piece sets up in the clearance top, and the carrier drives the installation piece and removes the in-process, and the distance between installation piece and two at least pins produces the change. The utility model can enable the lens to have variable focal length, is small in size and can accurately control the focal length.

Description

Lens driving mechanism

Technical Field

The present invention relates to the field of optical imaging devices, and more particularly, to a lens driving 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. Some electronic devices with a camera or video recording function are provided with a lens driving module to drive an Optical component such as a lens to move, so as to achieve the functions of auto focus (auto focus) and Optical Image Stabilization (OIS).

When a user uses an electronic device equipped with a lens module, the user may shake, and an image captured by the lens module may be blurred. Further, the demand for image quality is increasing, and the driving function of the lens module (optical element) is becoming important.

In order to meet the photographing requirement of the user, a person in the art needs to develop a novel lens driving mechanism, so that the lens of the electronic device has a variable focal length, is small in size, and can precisely control the focal length.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lens driving mechanism, which enables a lens of an electronic device to have a variable focal length, is small in size and can accurately control the focal length.

In order to solve the above technical problem, an embodiment of the present invention provides a lens driving mechanism, including a housing, an upper spring, a carrier, a coil assembly, a magnet assembly, a lower spring, and a base, where the upper spring, the carrier, and the lower spring are installed in a space defined by the housing and the base;

the carrier is provided with a hollow part for mounting an optical element, the coil component and the magnet component are arranged oppositely, any one of the coil component and the magnet component is arranged on the carrier, the other one is fixed in the limited space, the carrier is movably connected into the shell through the upper spring, and the carrier is movably connected onto the base through the lower spring; wherein

The base is provided with at least two pins, the lower reed is provided with an installation piece, the installation piece is fixedly arranged at the bottom end of the carrier and follows the carrier to move, two end parts of the at least two pins are oppositely arranged and provided with a gap, the installation piece is arranged above the gap, the carrier drives the installation piece to move, and the distance between the installation piece and the at least two pins changes.

Compared with the prior art, the optical element driving device is provided with the coil assembly and the magnet assembly, the coil assembly is arranged on the carrier, the magnet assembly and the coil assembly are arranged oppositely, the coil assembly and the magnet assembly are electrified to interact with each other to drive the carrier arranged on the coil assembly to displace along the axis of the lens driving mechanism, the optical element arranged in the hollow part of the carrier by the magnet can displace along the axis of the lens driving mechanism, and the optical element can have a variable focal length by a small-size structure. And set up two at least pins on the base, set up the installation piece on the carrier, through measuring the displacement of the clearance of two tip to two at least pins and installation piece, for example can be through external potentiometre formula displacement sensor, then can measure optical element's displacement, when optical element's displacement arrived the demand position, stopped to circular telegram coil pack, then control focus that can be accurate.

In one embodiment, the lower spring plate comprises a first part fixed on the upper surface of the base and a second part fixed on the lower surface of the carrier, the first part and the second part are connected through a plurality of spring wires, and the mounting plate is arranged on the second part.

In an embodiment, the base is provided with a first pin, a second pin and a third pin, the lower spring comprises a first spring wire, one end of the first spring wire is connected with the first pin, the other end of the first spring wire is connected with the mounting plate, the upper ends of the second pin and the third pin are embedded in the base, the gap is arranged between the ends of the second pin and the third pin, when the carrier moves, the potential difference among the first pin, the second pin and the third pin changes, and the displacement of the carrier moving is detected through the change of the potential difference.

In an embodiment, lower ends of the second pin and the third pin extend out of the base, an upper end of the second pin is provided with a second extending portion, an upper end of the third pin is provided with a third extending portion, and the second extending portion and the third extending portion extend oppositely in a direction parallel to a side portion of the base and form the gap.

In an embodiment, the lower spring further includes a second spring wire and a third spring wire, the base is further provided with a fourth pin and a fifth pin, one end of the second spring wire is connected with the fourth pin, the other end of the second spring wire is connected with the coil assembly, one end of the third spring wire is connected with the fifth pin, and the other end of the third spring wire is connected with the coil assembly.

In one embodiment, the fourth pin and the second pin are integrally formed with the lower spring.

In one embodiment, the first spring wire, the second spring wire and the third spring wire are connected by an auxiliary connecting plate.

In one embodiment, the width of the gap is less than the width of the mounting plate.

In one embodiment, the coil assembly is disposed at the periphery of the carrier, and the magnet assembly is disposed at the inner wall of the housing.

In one embodiment, the magnet assembly comprises four magnets fixedly arranged on the inner walls of the four end corners of the shell.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is an exploded view of a lens driving mechanism of one embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a lower spring, an auxiliary connecting plate and a pin assembly according to an embodiment of the utility model;

FIG. 3 is a schematic view of the structure of the lower spring and the auxiliary connecting plate assembly according to one embodiment of the present invention;

FIG. 4 is a schematic view of the structure of the lower spring, the auxiliary connecting plate and the base assembly according to one embodiment of the present invention;

fig. 5 is a structural view showing the assembly of the carrier, the coil block, the lower spring, the auxiliary connecting plate, and the base according to one embodiment of the present invention.

Reference numerals:

1. a housing;

2. a spring plate is arranged;

3. a carrier;

4. a coil assembly;

5. a magnet assembly; 51. a magnet;

6. a lower reed; 61. mounting a sheet; 62. a first portion; 63. a second portion; 64. a first spring wire; 65. a second spring wire; 66. a third spring wire; 67. an auxiliary connecting plate;

7. a base; 71. a first pin; 72. a second pin; 73. a gap; 74. a third pin; 75. a second extension portion; 76. a third extension portion; 77. a fourth pin; 78. and a fifth pin.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

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.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. 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.

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.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

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.

Embodiments of the present invention are described below with reference to the drawings.

As shown in fig. 1 and 2, a lens driving mechanism according to an embodiment of the present invention includes: the coil assembly comprises a shell 1, an upper spring leaf 2, a carrier 3, a coil assembly 4, a magnet assembly 5, a lower spring leaf 6 and a base 7, wherein the upper spring leaf 2, the carrier 3 and the lower spring leaf 6 are arranged in a space defined by the shell 1 and the base 7. The carrier 3 is provided with a hollow part for mounting an optical element, the coil component 4 is arranged opposite to the magnet component 5, the coil component 4 is arranged on the carrier 3, the magnet component 5 is fixedly arranged in a limited space, the upper reed 2 movably connects the carrier 3 in the shell 1, and the lower reed 6 movably connects the carrier 3 on the base 7. Base 7 is equipped with two pins, and lower reed 6 is equipped with installation piece 61, and installation piece 61 is fixed to be set up in carrier 3 bottom and follows the motion of carrier 3, and two tip mutual dispositions of two pins are equipped with clearance 73, and installation piece 61 sets up in clearance 73 top, and carrier 3 drives installation piece 61 and removes the in-process, and the distance between installation piece 61 and the two pins produces the change.

When the lens driving mechanism is used, an optical element (such as a lens) is arranged in the hollow part of the carrier 3 and is controlled by the carrier 3, the coil assembly 4 is electrified, the coil assembly 4 can generate a magnetic field, the magnetic field of the coil assembly 4 can generate interaction with the magnetic field of the magnet assembly 5, and the magnet assembly 5 and the whole lens driving mechanism are relatively fixed, so that the carrier 3 provided with the coil assembly 4 can be displaced along the axis of the lens driving mechanism, the mounting sheet 61 fixedly arranged at the bottom end of the carrier 3 can be displaced along with the carrier 3, and the distance between the mounting sheet 61 and the two pins can be changed. By connecting the potentiometer-type displacement sensor to the two pins and the lower reed 6, when the distance between the mounting piece 61 and the two pins changes, the resistance of the potentiometer-type displacement sensor connected with the mounting piece changes, the change amount of the resistance value can reflect the value of the displacement, and the increase or decrease of the resistance value indicates the direction of the displacement. The coil assembly 4 is controlled to be powered on or powered off through the measured value of the potentiometer type displacement sensor, the carrier 3 is moved to a required position, and then the optical element is moved to the required position along with the carrier.

Compared with the prior art, the coil assembly 4 is arranged on the carrier 3 by arranging the coil assembly 4 and the magnet assembly 5, the magnet assembly 5 is arranged opposite to the coil assembly 4, the coil assembly 4 and the magnet assembly 5 are interacted to drive the carrier 3 arranged on the coil assembly 4 to displace along the axis of the lens driving mechanism by electrifying the coil assembly 4, and the optical element of the magnet 51 arranged in the hollow part of the carrier 3 can displace along the axis of the lens driving mechanism along with the displacement, so that the optical element can have a variable focal length by a structure with small volume. And set up two at least pins on base 7, set up installation piece 61 on carrier 3, through measuring the displacement of the clearance 73 of two tip of two at least pins and installation piece 61, for example can be through external potentiometre formula displacement sensor, then can measure optical element's displacement, when optical element's displacement reached the demand position, stopped to energize coil pack 4, then can accurate control focus.

It should be understood that any one of the coil assembly 4 and the magnet assembly 5 is disposed on the carrier 3, and the other is fixed in the limited space, and only by fixedly disposing any one of the coil assembly 4 and the magnet assembly 5 on the carrier 3, and enabling the other to move relatively, the zooming of the optical element can be achieved by energizing the coil assembly 4, and generating the interaction between the coil assembly 4 and the magnet assembly 5 and further generating the relative displacement, without departing from the scope of the present invention. The utility model is not limited to two pins, alternatively, three or four pins may be provided, and those skilled in the art may set the pins according to actual needs.

Further, as shown in fig. 3, 4 and 5, the lower spring 6 includes a first portion 62 fixed to the upper surface of the base 7 and a second portion 63 fixed to the lower surface of the carrier 3, the first portion 62 and the second portion 63 are formed by three spring wires: the first spring wire 64, the second spring wire 65 and the third spring wire 66 are connected, wherein the mounting plate 61 is provided on the second portion 63. By this arrangement the base 7 and the carrier 3 are movably connected together by the lower spring 6 and the carrier 3 has a tendency to return to its original position in connection with the base 7 after the force on the carrier 3 has disappeared. The setting can be performed by those skilled in the art according to actual needs.

As shown in fig. 4, the base 7 is provided with a first leg 71, a second leg 72, and a third leg 74, the lower spring 6 includes a first spring wire 64, one end of the first spring wire 64 is connected to the first leg 71, the other end of the first spring wire 64 is connected to the mounting piece 61, the upper ends of the second leg 72 and the third leg 74 are built in the base 7, and a gap 73 is provided between the ends, and when the carrier 3 moves, the potential difference between the first leg 71, the second leg 72, and the third leg 74 changes, and the displacement of the movement of the carrier 3 is detected by the change in the potential difference.

When the lens driving mechanism is used, the optical element (such as a lens) is arranged in the hollow part of the carrier 3 and is controlled with the carrier 3, the coil assembly 4 is electrified, the magnetic field of the coil assembly 4 can interact with the magnetic field of the magnet assembly 5, the carrier 3 provided with the coil assembly 4 can displace along the axis of the lens driving mechanism, the mounting sheet 61 fixedly arranged at the bottom end of the carrier 3 can displace along with the carrier 3, and the distance between the mounting sheet 61 and the second pin 72 as well as the distance between the mounting sheet 61 and the third pin 74 can change. The potential difference among the first pin 71, the second pin 72, and the third pin 74 changes, and the displacement of the movement of the carrier 3 can be detected by the change in the potential difference. By measuring the value, the control switches the coil assembly 4 on or off to move the carrier 3 to the desired position and therewith the optical element to the desired position.

Further, as shown in fig. 4, the lower ends of the second pin 72 and the third pin 74 extend out of the base 7, the upper end of the second pin 72 is provided with a second extending portion 75, the upper end of the third pin 74 is provided with a third extending portion 76, and the second extending portion 75 and the third extending portion 76 extend in a direction parallel to the side portion of the base 7 and form a gap 73. The setting can be performed by those skilled in the art according to actual needs.

In another embodiment, as shown in fig. 2, 4 and 5, the lower spring 6 comprises a second spring wire 65 and a third spring wire 66, the base 7 is further provided with a fourth pin 77 and a fifth pin 78, one end of the second spring wire 65 is connected with the fourth pin 77, the other end of the second spring wire 65 is connected with the coil assembly 4, one end of the third spring wire 66 is connected with the fifth pin 78, and the other end of the third spring wire 66 is connected with the coil assembly 4. By arranging the second spring wire 65, the third spring wire 66, the fourth pin 77 and the fifth pin 78, one of the pins of the fourth pin 77 and the fifth pin 78 can be used as an input pin, and the other pin can be used as an output pin for supplying power to the coil assembly 4, and the first spring wire 64 and the second spring wire 65 have both an elastic function and a current transmission function, and can be arranged according to actual needs by a person skilled in the art.

Further, fourth leg 77 and second leg 72 are integrally formed with lower spring 6. The setting can be performed by those skilled in the art according to actual needs.

Preferably, the first spring wire 64, the second spring wire 65 and the third spring wire 66 are connected by an auxiliary connecting plate 67. Through setting up auxiliary connecting plate 67, can be comparatively convenient accomplish reed 6 and other part assembly of camera lens actuating mechanism down, need amputate auxiliary connecting plate 67 after the installation is accomplished. The setting can be performed by those skilled in the art according to actual needs.

Additionally, as shown in FIG. 2, the width of the gap 73 is less than the width of the mounting plate. With this arrangement, when the gap 73 is displaced from the mounting plate, the change of the measured potential difference between the gap 73 and the end of the mounting plate can be more easily and accurately obtained, and the arrangement can be performed by those skilled in the art according to actual needs.

As shown in fig. 1, the coil unit 4 is provided on the outer periphery of the carrier 3, and the magnet unit 5 is provided on the inner wall of the housing 1. The setting can be performed by those skilled in the art according to actual needs.

As shown in fig. 1, the magnet assembly 5 may be provided with four magnets 51, and the four magnets 51 may be fixed to the inner walls of the four corners of the housing 1. The setting can be performed by those skilled in the art according to actual needs.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the utility model, and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model in practice.

Claims

1. A lens driving mechanism is characterized by comprising a shell, an upper reed, a carrier, a coil assembly, a magnet assembly, a lower reed and a base, wherein the upper reed, the carrier and the lower reed are arranged in a space defined by the shell and the base;

2. The lens driving mechanism according to claim 1, wherein the lower spring includes a first portion fixed to the upper surface of the base and a second portion fixed to the lower surface of the carrier, the first portion and the second portion being connected by a plurality of wires, wherein the mounting piece is provided on the second portion.

3. The lens driving mechanism according to claim 1, wherein the base has a first pin, a second pin, and a third pin, the lower spring includes a first spring, one end of the first spring is connected to the first pin, the other end of the first spring is connected to the mounting plate, upper ends of the second pin and the third pin are embedded in the base, and the gap is provided between the ends, and when the carrier moves, a potential difference between the first pin, the second pin, and the third pin changes, and displacement of the carrier movement is detected by the change in the potential difference.

4. The lens driving mechanism according to claim 3, wherein lower ends of the second pin and the third pin protrude outside the base, an upper end of the second pin is provided with a second extending portion, an upper end of the third pin is provided with a third extending portion, and the second extending portion and the third extending portion extend in a direction parallel to a side portion of the base and form the gap.

5. The lens driving mechanism according to claim 4, wherein the lower spring further includes a second spring wire and a third spring wire, the base further includes a fourth pin and a fifth pin, one end of the second spring wire is connected to the fourth pin, the other end of the second spring wire is connected to the coil block, one end of the third spring wire is connected to the fifth pin, and the other end of the third spring wire is connected to the coil block.

6. The lens driving mechanism according to claim 5, wherein the fourth pin and the second pin are integrally formed with the lower spring.

7. The lens driving mechanism according to claim 5, wherein the first spring wire, the second spring wire, and the third spring wire are connected by an auxiliary connecting plate.

8. The lens driving mechanism according to claim 1, wherein a width of the gap is smaller than a width of the mounting piece.

9. The lens driving mechanism according to claim 1, wherein the coil unit is provided on an outer periphery of the carrier, and the magnet unit is provided on an inner wall of the housing.

10. The lens driving mechanism according to claim 1, wherein the magnet assembly includes four magnets fixedly disposed on inner walls of four end corners of the housing.