KR20210134575A - Motor for actuating lens - Google Patents

Abstract

According to an embodiment of the present invention, provided is a lens driving motor, which comprises: a mover including a first coil unit; a driving unit including a magnet unit having an inner surface to face an outer surface of the first coil unit to move the mover, a housing having the magnet unit disposed therein, and a second coil unit disposed to face a lower surface of the magnet unit to move the housing; a substrate including a substrate unit electrically connected to the second coil unit, a terminal unit formed to be bent downward from a side surface of the substrate unit, and a fixing unit having at least one side surface extending from the terminal unit; a base for supporting the mover and the driving unit, and having an extension unit protruding to correspond to the fixing unit on a lower surface thereof; and a cover can be coupled to the base to accommodate the mover and the driving unit. Therefore, reliability is improved by improving the structure of the terminal unit and the base.

Description

Lens drive motor {MOTOR FOR ACTUATING LENS}

An embodiment of the present invention relates to a lens driving motor having an improved structure.

As various types of portable terminals are widely distributed and wireless Internet services are commercialized, the demands of consumers related to portable terminals are also diversifying. Accordingly, various types of additional devices are being installed in portable terminals.

Among them, a camera module is a representative that can take a photo or video of a subject, store the image data, and edit and transmit it as needed.

In recent years, the demand for compact camera modules is increasing for use in various multimedia fields such as notebook personal computers, camera phones, PDA, smart devices, toys, etc., and for image input devices such as information terminals of surveillance cameras and video tape recorders. .

The camera module needs to be connected to a board in order to efficiently supply power to the actuator for the anti-shake function, but the reliability of the board may be a problem.

(Patent Document 1) JP2013-024944 A

The embodiment may provide a lens driving motor with improved reliability by proposing a structure capable of firmly fixing the terminal part.

Embodiments include a mover including a first coil unit; A magnet portion having an inner surface opposite to the outer surface of the first coil portion to move the mover, a housing in which the magnet portion is disposed, and a second portion disposed to face a lower surface of the magnet portion to move the housing a driving unit including a coil unit; a board including a board part electrically connected to the second coil part, a terminal part bent downward from a side surface of the board part, and a fixing part extending from the terminal part on at least one side; a base supporting the movable part and the driving part, and having an extended part protruding corresponding to the fixing part on a lower surface thereof; and a cover can coupled to the base to accommodate the mover and the driving unit.

On the other hand, the embodiment is a lens unit; The lens unit is fixed, the movable element including a first coil unit; A magnet portion having an inner surface opposite to the outer surface of the first coil portion to move the mover, a housing in which the magnet portion is disposed, and a second portion disposed to face a lower surface of the magnet portion to move the housing a driving unit including a coil unit; a board including a board part electrically connected to the second coil part, a terminal part bent downward from a side surface of the board part, and a fixing part extending from the terminal part on at least one side; a base supporting the movable part and the driving part, and having an extended part protruding corresponding to the fixing part on a lower surface thereof; and a cover can coupled to the base to accommodate the mover and the driving unit.

In addition, the terminal part may be electrically connected to the board part, and the fixing part may be formed of a non-conductive material extending from the terminal part.

In addition, at least one through hole may be formed in the fixing part.

In addition, the terminal portion may be formed to have the same height as the height of the extension portion or to be longer.

In addition, the base may have a seating groove formed on a side surface in which the terminal part is seated, and the extension part may be formed on a lower surface of the seating groove.

In addition, the extension portion may further include a concave groove through which the adhesive can be introduced into the side or lower surface in contact with the fixing portion.

In addition, the camera module may further include a printed circuit board disposed on the lower surface of the base and electrically connected to the terminal unit.

In addition, soldering points for electrically connecting to the terminals of the terminal unit may be formed on the printed circuit board.

In addition, an image sensor may be mounted on the printed circuit board.

According to an embodiment of the present invention, it is possible to implement a lens driving motor or a camera module having improved reliability by improving the structures of the terminal part and the base.

1 is an exploded perspective view of a lens driving motor according to an embodiment of the present invention;
2 is a perspective view of a substrate according to an embodiment of the present invention;
3 is a perspective view of a base according to an embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Unless otherwise specified, all terms herein have the same general meaning as understood by those skilled in the art, and if a term used in this specification conflicts with the general meaning of the term, the definition used herein shall govern.

However, the invention to be described below is only for explaining the embodiments of the present invention, not for limiting the scope of the present invention, and the same reference numbers used throughout the specification indicate the same components.

Hereinafter, the lens driving motor of the embodiment will be described in detail with reference to the drawings.

1 is an exploded perspective view of a lens driving motor according to an embodiment of the present invention, FIG. 2 is a perspective view of a substrate according to an embodiment of the present invention, and FIG. 3 is a perspective view of a base according to an embodiment of the present invention.

Referring to FIG. 1 , the lens driving motor according to the embodiment may largely include a mover 200 , a driving unit 300 , and a cover can 100 , and may further include an elastic unit 600 .

The cover can 100 may be fastened to a base 350 to be described later to accommodate the mover 200 , the driving unit 300 and the elastic unit 600 , and may form the exterior of the lens driving motor.

1 and 3, the cover can 100 may be formed in the shape of a rectangular parallelepiped in which an opening is formed on the upper side and the lower side is open. However, the shape of the cover can 100 is thus It is not limited.

In other words, the shape of the cover can 100 may be a quadrangular shape or an octagonal shape when viewed from the top, and may be implemented in any other shape.

The inner surface of the cover can 100 may be combined with a base 350 to be described later, and may have a function of preventing penetration of external contaminants while protecting internal components from external impacts.

In addition, the cover can 100 may also perform a function of protecting the components of the camera module from external interference generated by a mobile phone or the like. Accordingly, the cover can 100 may be formed of a metal material such as iron or aluminum, and may be plated with a metal such as nickel to prevent corrosion. In addition, the cover can 100 may be formed of a magnetic material and may function as a yoke.

The cover can 100 may be implemented as a yoke unit itself, which will be described later, or may be fixed by molding the yoke unit on the inside. In an embodiment, an inner yoke (not shown) bent inside the cover can 100 may be formed on the inner side of the upper side of the cover can 100 . This inner yoke may be located in the concave portion 213 formed in the bobbin 210 to be described later.

In this case, the inner yoke may be disposed at a corner around the opening on the upper side of the yoke portion or may be disposed on the side, and the concave portion 213 of the bobbin 210 may be formed at a corresponding position.

In addition, the cover can 100 may be provided with a seating portion 110 in which a portion corresponding to the seating groove 354 extends downward at a predetermined interval among one surface coupled to the base 350 to be described later. Due to the part 110, when the cover can 100 is inserted into the base 350, the terminal part 342 of the substrate 340, which will be described later, may be naturally bent. Meanwhile, the terminal part 342 of the substrate 340, which will be described later, may be bent in advance and disposed between the seating groove 354 of the base 350 and the seating part 110 of the cover can 100 . The seating groove 354 may be a groove.

The mover 200 may be moved by accommodating a lens or a lens unit (not shown) to be described later. The mover 200 may include a bobbin 210 and a first coil unit 220 .

The bobbin 210 may accommodate a lens unit (not shown) inside. Specifically, the bobbin 210 is coupled to a lens unit to be described later to fix the lens unit, and in the coupling method of the lens unit and the bobbin 210, a screw thread is formed on the inner circumferential surface of the bobbin 210 and the outer circumferential surface of the lens unit, respectively, and is fastened. A threaded coupling method may be used, but it may be coupled by a non-threaded method using an adhesive. Of course, even in the screw thread coupling method, it is possible to achieve a more robust mounting between each other by using an adhesive after the screw thread fastening.

In addition, a guide part 211 , which guides winding or mounting of the first coil part 220 , which will be described later, may be formed on the outer peripheral surface of the bobbin 210 . The guide part 211 may be integrally formed with the outer surface of the bobbin 210 , and may be formed continuously along the outer surface of the bobbin 210 , or may be formed to be spaced apart from each other at predetermined intervals as shown. have.

In addition, an upper spring 610 and/or a lower spring 620 provided on the upper side and/or lower side of the bobbin 210 so that the bobbin 210 can be supported on the upper side of the base 350 to be described later. An inner fastening protrusion 212 to which this is fastened may be formed.

In addition, the bobbin 210 is formed on the outer circumferential surface so that the inner yoke of the cover can 100 described above can be positioned between the bobbin 210 and the first coil unit 220 wound around the bobbin 210 . It may further include a concave portion 213 .

*

The mover 200 may include a first coil unit 220 , and the first coil unit 220 may be disposed on an outer surface of the bobbin 210 . Specifically, the first coil unit 220 may be guided by the guide unit 211 of the bobbin 210 and wound on the outer surface of the bobbin 210 , and the pre-wound coil unit may be wound on the guide unit 211 . ) can also be installed. Alternatively, four individual coils (not shown) may be disposed on the outer surface of the bobbin 210 at intervals of 90°. The first coil unit 220 may receive power applied from a printed circuit board (not shown) to be described later to form an electromagnetic field.

The driving unit 300 moves the mover 200 , and the driving unit 300 includes a housing 310 , a magnet unit 320 , a second coil unit 330 , a substrate 340 , and a base 350 . may include.

The housing 310 may be formed in a shape corresponding to the inner surface of the cover can 100 .

In an embodiment, the housing 310 may be supported on the base 350 and accommodate the bobbin 210 inside, and may be formed in a hexahedral shape corresponding to the shape of the cover can 100 , , the lower side may be opened to support the movable part or the bobbin 210 .

In addition, the housing 310 may include a magnet part fastening groove 311 or a hole formed in a shape corresponding to the magnet part 320 on the side so that a magnet part 320 to be described later can be disposed. The magnet part fastening groove 311 or hole may be formed in the housing 310 with a number corresponding to the magnets 320a, 320b, 320c, and 320d of the magnet part 320 to be described later.

In addition, the magnet part fastening groove 311 or hole may be formed in each corner of the housing 310 as shown, but may also be formed in each inner surface of the housing 310 .

In the embodiment, the magnet portion fastening groove 311 accommodates the front or partial surfaces of each magnet 320a, 320b, 320c, and 320d except for the surface (inner surface) facing the first coil unit 220 . can be formed to do so.

The magnet portion fastening groove 311 is formed to correspond to the shape and/or size of the magnets 320a, 320b, 320c, and 320d, and the assembly tolerance for the housing 310 of the magnets 320a, 320b, 320c, 320d. can be prevented from occurring. In addition, by applying an adhesive such as epoxy to some or all of the contact surfaces of the magnet part fastening groove 311 or the magnets 320a, 320b, 320c, 320d, more robust fastening and/or fastening to an accurate position can be implemented. .

In the embodiment, since the magnets 320a, 320b, 320c, and 320d have a structure that can be firmly and accurately fixed to the housing 310, the electromagnetic interaction with the first coil unit 220 is accurate, and magnetic force By minimizing the adhesion of foreign substances, an excellent actuator can be realized.

In addition, the housing 310 may be formed of an insulating material, and may be formed as an injection molding product in consideration of productivity.

Also, the housing 310 is a moving part for driving the OIS and may be disposed to be spaced apart from the cover can 100 by a predetermined distance. In this case, the bobbin 210 may be moved in the optical axis direction due to the interaction between the first coil unit 220 and the magnet unit 320 , and the housing 310 may be connected to the magnet unit 320 and to be described later. The second coil unit 330 may move in a direction orthogonal to the optical axis direction and/or in a horizontal direction due to the interaction of the second coil unit 330 .

In addition, at least two stoppers 312 protruding from the upper surface of the housing 310 and capable of absorbing an external shock may be formed to be spaced apart from each other by a predetermined distance. The stopper 312 may be formed integrally with the housing 310 , may be formed on the bobbin 210 , or may not be formed.

The magnet unit 320 may be disposed in the housing 310 to face the first coil unit 220 , that is, an inner surface thereof may face an outer surface of the first coil unit 220 . Specifically, the magnet unit 320 may be mounted on the housing 310 with an adhesive or the like, and may be mounted at equal intervals at four corners inside the housing 310 to promote efficient use of the internal volume. . Alternatively, the magnet unit 320 may be mounted on four inner surfaces of the housing 310 to face the first coil unit 220 .

The shape of each of the magnets 320a, 320b, 320c, and 320d constituting the magnet part 320 may be formed in a trapezoidal prism shape as shown, but may be a triangular prism shape, a quadrangular prism shape, etc. In a columnar shape, a surface opposite to the first coil unit 220 may be formed to include some curves. Also, the magnets 320a, 320b, 320c, and 320d may be machined to have some curved edges during machining. A magnet part fastening groove 311 corresponding to the shape of each of the magnets 320a, 320b, 320c, and 320d may be formed in the housing 310 .

The second coil unit 330 may be disposed on the base 350 to face the magnet unit 320 to move the housing. Specifically, the second coil unit 330 may be mounted on or formed on a substrate 340 provided on an upper side of the base 350, which will be described later. A through hole 331 may be formed in the .

On the other hand, in consideration of reducing the height in the z-axis direction, which is the optical axis direction, in order to reduce the size of the lens driving motor, the second coil unit 330 may be formed of an FP coil which is a flat patterned coil. have.

The substrate 340 may be implemented as a flexible printed circuit board (FPCB) in consideration of reducing the height in the z-axis direction, which is the optical axis direction, in order to reduce the size of the lens driving motor.

In this case, the substrate 340 includes a substrate part 344 disposed between a base 350 and the second coil part 330 to be described later, and a side surface of the substrate part 344 bent downward. It may include a terminal part 342 , and a fixing part 342b extending to one side or both sides of the terminal part 342 may be disposed as shown in FIG. 2 . The surface of the fixing part 342b may be formed of a non-conductive material. The substrate part 344 may be a body part.

The terminal part 342 may be formed to have the same height, shorter or longer than the side of the base 350, so as to make an effective electrical contact with a printed circuit board (not shown), which will be described later. In the short case, the space is filled by soldering, and in the long case, it can be overlapped and electrically connected. In addition, the fixing portion 342b may be formed to be the same as, shorter or longer than the height of the extension portion 357 of the base 350, which will be described later.

The substrate part 344 and the terminal part 342 are generally patterned or plated to have electrical conductivity. Specifically, the terminal part 342 includes a conductive region 342a of the terminal part 342 in which a plurality of terminals 342c electrically connected to a printed circuit board (not shown) to be described later are disposed, and the conductive region 342a. ) may be formed on one side or both sides of the substrate 340 to have non-conductivity, or may be partitioned by a fixing part 342b to which a non-conductive base material is exposed.

All or part of the fixing part 342b is firmly fixed to the extension part 357 of the base 350, which will be described later, to prevent deformation of the terminal part 342 as a result. For a firm fixation, at least one or more through-holes 342d may be formed in the fixing portion 342b, and the extension 357 of the base 350 and the fixing portion 342b by injecting an adhesive into these through-holes. ) can be secured firmly. The shape of the through hole 342d is illustrated in a circular shape, but is not limited thereto. Alternatively, concave grooves 357a and/or 357b may be formed in the extension portion 357 of the base 350 corresponding to the through hole 342d as shown in FIG. 3 .

The terminal part 342 may be bent downward (in the base direction) to be soldered to a separate printed circuit board to be described later, and the terminal part 342 may be bent at a right angle or the cover can 100 may be a base to be described later It is bent when inserted into the 350, or is bent at an acute angle away from the cover can 100 toward the lower side to prevent short circuit caused by solder that may occur during soldering.

In addition, the substrate 340 may be provided on the upper surface of the base 350 to be described later in order to apply power to the second coil unit 330 , and a through hole 331 of the second coil unit 330 . A through hole 341 corresponding to the .

The hall sensor unit 345 may be mounted on the substrate 340 . Specifically, the Hall sensor unit 345 may sense the strength and/or phase of a magnetic field to detect the movement of the magnet unit 320 and precisely control the housing. In this case, the substrate 340 may further include a Hall sensor terminal 343 for applying power to the Hall sensor 345 .

In addition, the Hall sensor unit 345 may be provided on a straight line with respect to the magnet unit 320 and the optical axis direction, and has to detect displacements in the x-axis and the y-axis, so that the Hall sensor unit 345 is the It may include two Hall sensors respectively provided at two adjacent corners among the corners of the substrate 340 . That is, each of the hall sensors located under the two magnets positioned adjacently in the right angle direction individually sense the positions of the magnets 320a, 320b, 320c, and 320d driven in the x-axis or the y-axis, the magnet part 320 . This is because it is easy to complexly calculate the amount of movement of

In addition, the hall sensor unit 345 may be additionally disposed on the outer surface of the bobbin 210 . In this case, feedback AF may be implemented by detecting the position of the bobbin in the z-axis direction. In addition, the Hall sensor unit 345 may be disposed on the bobbin 210 inside the first coil unit 220 . In this case, the Hall sensor unit 345 is covered by the first coil unit 220 . It may not be visible from the outside. Also, the Hall sensor unit 345 may be disposed outside the first coil unit 220 . Any one of the Hall sensor unit 345 disposed on the substrate 340 and the additional Hall sensor unit disposed on the bobbin 210 may be referred to as a 'first Hall sensor' and the other may be referred to as a 'second Hall sensor'. .

Although the hall sensor unit 345 may be provided closer to the first coil unit 220 or the second coil unit 330 than the magnet unit 320 , the strength of the magnetic field formed by the magnet unit 320 . Considering that the strength of the electromagnetic field formed in the coil is several hundred times greater, the electromagnetic field of the first coil unit 220 or the second coil unit 330 may not be considered in detecting the movement of the magnet unit 320 . have.

By the independent or organic interaction of the first coil unit 220 and/or the second coil unit 330 and the magnet unit 320, the lens unit to be described later is moved in all directions to focus the image of the subject and , camera shake, etc. can be corrected.

Here, adjusting the focus of the image means an Auto Focusing (AF) function when the lens unit is moved in the z-axis direction, which is the optical axis direction, for near- or far-field focusing of a subject, or perpendicular to the z-axis direction for image stabilization It may mean an OIS (Optical Image Stabilization) function of moving the lens unit in the x and y-axis directions, or may mean a function of simultaneously performing the AF function and the OIS function.

That is, the embodiment may be implemented as an Auto Focusing (A.F) type or as an Optical Image Stabilization (OIS) type.

Although the above-described embodiment has been described with respect to the OIS type, the former may be implemented as an auto-focusing (AF) type. In this case, the embodiment may not include the second coil unit 330 and the substrate 340 . have.

The base 350 supports the mover 200 and the driving unit 300 , and a through hole 351 corresponding to the lens unit is formed in the center. In addition, the base 350 may have a circular shape in the center so that the bobbin 210 may be positioned to be spaced apart from each other, and a recess (not shown) concave downward may be formed. As shown in FIG. 3 , the base 350 may include a stepped portion 359 protruding from the outer circumferential surface of the base 350 .

In addition, the base 350 may be formed with one or more fixing protrusions 352 that protrude from the upper corner to face or combine with the inner surface of the cover can 100 , and these fixing protrusions 352 are formed on the cover. It facilitates guiding the fastening of the can 100 and at the same time makes it possible to achieve firm fixation after fastening.

In addition, a seating groove 354 in which the terminal part 342 is seated may be formed on a side surface of the base 350, and the terminal part 342 may be recessed into at least one side surface. In addition, the seating groove 354 may be formed at a right angle or an acute angle toward the bottom to correspond to the bending angle of the terminal part 342 .

In addition, the base 350 may have a Hall sensor receiving groove 353 corresponding to each Hall sensor of the Hall sensor unit 345 . In this case, the Hall sensor is mounted on the lower side of the substrate 340 . It is advantageous in miniaturization of the inner height.

In addition, an extension part 357 protruding at a position corresponding to the inner surface of the fixing part 342b may be formed on the lower surface of the base 350 . This extension part 357 may protrude inward, and since it supports the fixing part 342b from the inside, bending or cracking of the terminal part 342 of the board 340 can be effectively prevented. can

In addition, since the terminal part 342 may be seated in the seating groove 354 , the extension part 357 may be formed on a lower surface of the seating groove 354 . In addition, since the terminal part 342 must physically contact the printed circuit board in order to be electrically connected to the printed circuit board, the extension part 357 may be formed to be the same as or smaller than the terminal part 342 .

In addition, the extension portion 357 is a concave groove (357a, and/or 357b) through which the adhesive can be introduced into the side and/or the lower side in contact with the fixing portion in order to firmly support the fixing portion 342b. can be formed.

In addition, the lens driving motor may be coupled to a camera module, and in this case, the base 350 may perform a sensor holder function to protect an image sensor (not shown), which will be described later, and a filter (not shown) can be placed. In this case, the filter may be mounted in the through hole 351 formed in the center of the base 350, and an infrared filter or a blue filter may be provided.

Here, the filter (not shown) may be formed of, for example, a film material or a glass material, and an infrared blocking coating material may be disposed on a flat optical filter such as a cover glass for protecting an imaging surface or a cover glass. In addition, a separate sensor holder (not shown) may be located under the base 350 in addition to the base 350 .

On the other hand, when the filter is installed on the outside of the lens, it is of course possible to block infrared rays by coating the lens surface without separately configuring the filter.

On the other hand, the driving unit according to the embodiment of the present invention may further include an elastic unit (600).

The elastic unit 600 may include an upper spring 610 , a lower spring 620 , and a side spring 630 .

The upper spring 610 and the lower spring 620 may be formed of separate springs disposed on each side of the housing 310, but for efficiency in production, a plate spring in a shape in which a single plate is bent and cut. It is preferable to consist of

The upper spring 610 is disposed at the upper end of the housing 310 and protrudes from an opening formed at the upper end in the optical axis direction by a predetermined area, and the protruding portion supports the upper end of the bobbin 210 . That is, the upper spring 610 is fastened to the upper surface of the housing 310 and the upper surface of the bobbin 210 to support the bobbin 210 , and to provide a return force when the bobbin 210 moves upward. It is provided at the upper end of the 310 .

Specifically, the upper spring 610 includes a first upper spring 610a into which power applied from a printed circuit board, which will be described later, flows in, and a second upper spring through which the applied power flows through the first coil pattern part and flows out. (610b).

The first upper spring 610a and the second upper spring 610b may be formed as a leaf spring in a symmetrical or asymmetrical shape about the optical axis, and may be formed as a single leaf spring, but separately for input and output of power. It is preferably formed of a leaf spring of

Each of the first upper spring 610a and the second upper spring 610b includes an outer part 611 fastened to the housing 310, an inner part 612 fastened to the bobbin 210, and the outer part ( 611 ) and a connection part 613 electrically connecting the inner part 612 . Here, the connection part 613 may be formed as at least one bending part.

At least one outer fastening protrusion 313 is formed on the upper surface of the housing 310 for fastening the upper spring 610 , and the outer fastening protrusion 313 is formed on the outer part 611 to correspond to the outer fastening protrusion 313 . The formed outer fastening hole 611a may be formed. In addition, the outer protrusion 611b is formed on the outer portion 611 to be electrically connected to two side springs 630 to be described later.

On the other hand, for the fastening of the upper spring 610, at least one inner fastening protrusion 212 is formed on the upper surface of the bobbin 210, and the inner fastening protrusion 212 is formed on the inner part 612. Correspondingly formed inner fastening holes 612a may be formed.

In addition, one end 221 and the other end 222 of the coil wound around the first coil unit 220 are electrically connected to the inner portion 612 of each of the first upper spring 610a and the second upper spring 610b. An inner protrusion 612b for connection is formed, respectively.

The outer protrusion 611b and the side spring 630, the inner protrusion 612b, and one end 221 and the other end 222 of the coil may be electrically coupled by soldering, respectively.

Meanwhile, the outer portion 611 of the lower spring 620 is supported on the upper surface of the base 350 , and the inner portion 612 supports the lower end of the bobbin 210 . The lower spring 620 may be formed as a single leaf spring because power of a printed circuit board, which will be described later, is not input or output.

One side of the side spring 630 is fastened to the side surface of the housing 310 and the other side is fastened to the side surface of the base 350 . The side spring 630 may be provided with four side springs forming a predetermined interval at an angle of 90°.

A damper member (not shown) may be applied to the bonding surface of the side spring 630 and the housing 310 and/or the base 350 to attenuate the x and y-axis vibrations. Such a damper member may be implemented as an epoxy material in the form of a sol or gel, and is applied between the side spring 630 and the housing 310 and/or the base 350 to absorb shock.

On the other hand, the lens driving motor according to the embodiment may be mounted on a camera module, and such a camera module is a mobile phone or a notebook personal computer, a camera phone, PDA, smart, a variety of multimedia fields such as toys (toy), and further monitoring It may be provided in an image input device such as an information terminal of a camera or a video tape recorder.

When the lens driving motor according to the embodiment is provided in the camera module, the camera module may be configured by further including a lens unit, a printed circuit board, and/or an image sensor (not shown).

The unillustrated lens unit may be a lens barrel, but is not limited thereto, and any holder structure capable of supporting the lens may be included. In the embodiment, a case in which the lens unit is a lens barrel will be described as an example.

The lens unit is installed on the upper side of the printed circuit board, which will be described later, and is disposed at a position corresponding to the image sensor. This lens unit is provided with one or more lenses.

An image sensor (not shown) may be mounted on the central portion of the upper side of the printed circuit board (not shown), and various elements for driving the camera module may be mounted. In addition, the printed circuit board is the terminal part 342 or the lower spring 620 or the upper spring 610 or directly the first coil part ( 220 ) and/or electrically connected to the second coil unit 330 .

In addition, the printed circuit board may have a soldering point formed therein to apply power to the terminal of the terminal part 342 .

Above, those skilled in the art from the above description will know that various changes and modifications are possible without departing from the technical spirit of the present invention. It should be determined by the scope and its equivalent scope.

100: cover can 200: mover
210: bobbin 220: first coil unit
300: driving unit 310: housing
320: magnet unit 330: second coil unit
340: substrate 350: base

Claims (20)

Base;
a housing disposed on the base;
a bobbin disposed within the housing;
a first coil and a magnet for moving the bobbin in an optical axis direction;
a substrate disposed on the base;
a second coil disposed on the substrate and interacting with the magnet;
a first Hall sensor for detecting a position of the bobbin in the optical axis direction; and
a second Hall sensor disposed on the substrate;
The second Hall sensor overlaps the magnet in the optical axis direction,
The substrate includes a body portion disposed on the upper surface of the base, and a terminal portion extending downwardly from the body portion,
The body portion of the substrate includes a first side and a second side disposed opposite to each other, and a third side and a fourth side disposed opposite to each other,
The terminal portion is a lens driving motor extending from each of the first side and the second side of the body portion. According to claim 1,
At least a portion of the terminal portion of the substrate is fixed to the base by an adhesive. According to claim 1,
an upper spring connecting the housing and the bobbin,
The upper spring includes an outer portion coupled to the housing, an inner portion coupled to the bobbin, a connection portion connecting the outer portion and the inner portion, and an inner protrusion extending from the inner portion,
The inner protrusion includes a first inner protrusion coupled to one end of the first coil and a second inner protrusion coupled to the other end of the first coil. 4. The method of claim 3,
The first inner protrusion and the second inner protrusion are respectively coupled to one end and the other end of the first coil through soldering. 4. The method of claim 3,
Lens driving motor including an outer protrusion extending from the outer portion 6. The method of claim 5,
It includes a side elastic unit connected to the upper spring,
The outer protrusion is a lens driving motor coupled to the side elastic unit through soldering. 7. The method of claim 6,
and a damper member disposed between the side elastic unit and the housing. According to claim 1,
The terminal part includes a first fixing part and a second fixing part, and a terminal made of a conductive material disposed between the first fixing part and the second fixing part,
The first fixing part and the second fixing part are fixed to the base by an adhesive. 9. The method of claim 8,
The first fixing part and the second fixing part are a lens driving motor made of a non-conductive material. 9. The method of claim 8,
The first fixing part and the second fixing part are a lens driving motor including a through hole. 9. The method of claim 8,
The base includes a first extension portion and a second extension portion extending from the lower surface of the base and coupled to the first fixing portion and the second fixing portion,
The first extension part and the second extension part are spaced apart from each other. 12. The method of claim 11,
The base is a lens driving motor comprising a concave groove into which the adhesive is introduced into the side or the lower surface fixed to the first and second fixing parts. According to claim 1,
It is disposed on the base and includes a cover can including a top plate and a side plate extending from the top plate,
The base includes a step portion protruding from the outer peripheral surface of the base,
The base includes a groove formed on the outer peripheral surface of the base,
The terminal portion of the substrate is disposed in the groove of the base such that at least a portion of the terminal portion of the substrate is disposed between the base and the side plate of the cover can. According to claim 1,
The second Hall sensor includes two Hall sensors,
The two Hall sensors respectively sense a displacement of the magnet in an x-axis direction perpendicular to the optical-axis direction and a displacement of the magnet in the optical-axis direction and a y-axis direction perpendicular to the x-axis direction. Base;
a housing disposed on the base;
a bobbin disposed within the housing;
a first coil and a magnet for moving the bobbin in an optical axis direction;
a substrate disposed on the base;
a second coil disposed on the substrate and interacting with the magnet;
a first Hall sensor for detecting a position of the bobbin in the optical axis direction; and
a second Hall sensor disposed on the substrate;
The second Hall sensor overlaps the magnet in the optical axis direction,
The substrate includes a body portion disposed on the upper surface of the base, and a terminal portion extending downwardly from the body portion,
At least a portion of the terminal portion of the substrate is fixed to the base by an adhesive. 16. The method of claim 15,
The terminal part includes a first fixing part and a second fixing part, and a terminal made of a conductive material disposed between the first fixing part and the second fixing part,
The first fixing part and the second fixing part are fixed to the base by the adhesive. 17. The method of claim 16,
The base includes a first extension portion and a second extension portion extending from the lower surface of the base and coupled to the first fixing portion and the second fixing portion,
The first extension part and the second extension part are spaced apart from each other. printed circuit board;
an image sensor disposed on the printed circuit board;
The lens driving motor of any one of claims 1 to 17, which is disposed on the printed circuit board; and
A camera module including a lens coupled to the bobbin of the lens driving motor. A mobile terminal comprising the camera module of claim 18 . Base;
a housing disposed on the base;
a bobbin disposed within the housing;
a first coil and a magnet for moving the bobbin in an optical axis direction;
a substrate disposed on the base; and
and a second coil disposed on the substrate and interacting with the magnet.

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