KR20200066273A - Actuator for actuating lens - Google Patents

Abstract

The present invention provides an actuator which is improved in aspects of tolerance reduction of assembly processes, automation realization, and process costs in comparison to a conventional technique. The actuator comprises: a cover can forming appearance; a base fastened to a lower side of the cover can; a bobbin arranged on an upper side of the base to fix a lens unit; a movable element including a coil unit arranged on the outer surface of the bobbin; and a stator including a magnet unit facing the outside of the coil unit and a housing to fix the magnet unit. The housing includes: a magnet unit fastening hole formed on a side in a shape corresponding to the magnet unit; and a first bonding hole which is formed on the lower surface of the magnet unit fastening hole, and allows an adhesive for fixing the magnet unit to the magnet unit fastening hole to be introduced thereinto.

Description

Lens-driven actuator {ACTUATOR FOR ACTUATING LENS}

An embodiment of the present invention relates to an actuator having an improved structure, a camera module equipped with the actuator, and a mobile phone.

2. Description of the Related Art As the spread of various portable terminals is widely generalized and wireless Internet services are commercialized, the needs of consumers related to the portable terminals are also diversified, and accordingly various types of additional devices are mounted on the portable terminals.

Among them, an actuator is a representative that can photograph a subject as a photo or video, store the image data, and edit and transmit it as needed.

2. Description of the Related Art In recent years, demand for a small actuator has been increasing for a variety of multimedia fields such as notebook personal computers, camera phones, PDAs, smarts, and toys, and also for image input devices such as surveillance cameras or video tape recorder information terminals.

In particular, cameras for mobile phones are trending toward high pixel size and miniaturization according to the rapid change in the smartphone market, and it is necessary to shorten the assembly process and reduce the number of people in order to reduce the price.

The assembly process of the conventional actuator is largely performed by performing an upper assembly process for fastening the magnet-bonded housing to the cover can, and a lower assembly process for fastening the coiled bobbin to the base, and fastening the cover can and the base. do.

That is, in assembling the actuator, at least three processes are required: a bonding process of the magnet and the housing, a bonding process of the housing and the cover can, and a bonding process of the cover can and the base. Here, the bonding process is performed using an adhesive such as epoxy.

The complicated assembly process has the following problems.

First, in order to bond the upper assembly and the lower assembly, a problem in which adhesive strength is reduced when the adhesive applied to the upper assembly is left for a long time may occur. As a result, the reduction in adhesive strength may decrease the performance of the actuator, and may cause an increase in performance defects such as hysteresis due to separation of resin contained in the adhesive.

Second, since the application of the adhesive must be performed at least two or three times, the process cost to add the equipment and the worker for bonding increases.

Third, as the number of bonding operations increases, there is a problem in that automation of the assembly process is difficult.

The embodiment is to provide an improved actuator compared to the conventional in terms of reducing the tolerance of the assembly process, implementing automation, and process cost.

An embodiment is a mover comprising a cover can forming an exterior, a base fastened to the lower side of the cover can, a bobbin provided on the upper side of the base and fixing a lens unit, and a coil portion provided on an outer surface of the bobbin. And a stator including a magnet part provided opposite to the outer side of the coil part and a housing for fixing the magnet part, wherein the housing has a magnet part fastening hole formed in a shape corresponding to the magnet part on a side surface, It is formed on the lower surface of the fastening hole of the magnet portion to provide an actuator including two or more first bonding holes through which an adhesive for fixing the magnet portion to the magnet portion fastening hole is introduced.

In addition, the first bonding hole is open toward the outside of the housing, and may be formed to be closed by the inner circumferential surface of the cover can.

In addition, the housing is formed in a hexahedral shape with upper and lower sides open, and the magnet part may be provided on four sides of the housing.

In addition, the housing may further include a second bonding hole formed between the first bonding hole and into which an adhesive for fixing the cover can and the base flows.

In addition, the second bonding hole is open toward the outside of the housing, and may be formed to be closed by the inner circumferential surface of the cover can.

In addition, the housing is formed in a hexahedral shape with upper and lower sides open, and the second bonding hole may be formed at corners of the housing, respectively.

In addition, the cover can may be formed of a metal material.

In addition, a lower end of the cover can is formed with at least one fastening piece extending on each surface, and a fastening groove into which the fastening piece is inserted may be formed in the base.

In addition, the stator may include a yoke portion fixing the magnet portion.

In addition, the yoke portion may be implemented as the cover can.

In addition, an upper side of the cover can is formed with an opening through which the lens of the moving part is exposed, and an inner yoke formed bent inside the cover can is formed in the opening, and the inner yoke is formed on the bobbin and the bobbin. Grooves formed on the outer circumferential surface may be formed to be positioned between the coiled coil portions.

Meanwhile, an embodiment of the present invention may be implemented as a camera module or a mobile phone including the actuator.

According to an embodiment of the present invention, the structure of the housing is improved to shorten assembly tolerances, improve productivity, reduce labor costs due to automation, and improve reliability due to improved adhesion.

1 is an assembled perspective view of an actuator according to an embodiment of the present invention.
2 is an exploded perspective view of an actuator according to an embodiment of the present invention.
3 is a perspective view of a housing according to an embodiment of the present invention.
4 is a rear view of a housing according to an embodiment of the present invention.
Figure 5 is a rear view of the housing, the cover can and the lower spring 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 in this specification are the same as the general meaning of terms understood by those skilled in the art, and if the terms used in this specification conflict with the general meanings of the terms, the definitions used in the present specification are used. .

However, the invention to be described below is only for describing the embodiments of the present invention and is not intended to limit the scope of the present invention, and the same reference numerals are used throughout the specification.

Hereinafter, the actuator of the embodiment will be described in detail with reference to the drawings.

1 is an assembled perspective view of an actuator according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of an actuator according to an embodiment of the present invention, and FIG. 3 is a perspective view of the housing 320 according to an embodiment of the present invention, 4 is a rear view of the housing 320 according to an embodiment of the present invention, and FIG. 5 is a combined rear view of the housing 320, the cover can 100 and the lower spring 151 according to the embodiment of the present invention. .

1 and 2, the actuator according to the embodiment may largely include a mover 200, a stator 300, a base 400 and an elastic unit 500.

The actuator according to the embodiment may further include a cover can 100, the cover can 100 accommodates the mover 200, the stator 300 and the elastic unit 500, and the appearance of the actuator Can form. In addition, the cover can 100 is mounted on the base 400, the inner surface of which is in close contact with the side portion of the base 400 to be described later, and protects internal components from external impact while preventing external pollutant penetration. Have

In an embodiment, in order for the cover can 100 to be fastened to the base 400, a lower end of the cover can 100 may be formed with a fastening piece 110 extending at least one or more on each surface, and the base The fastening groove 410 in which the fastening piece 110 is inserted is formed in the 400 to implement a more robust sealing function and fastening function.

In addition, the cover can 100 should also perform a function of protecting a component of the actuator from external radio interference generated by a mobile phone or the like. Therefore, the cover can 100 is preferably formed of a metal material. The cover can 100 may be implemented as a yoke portion itself, or may be fixed by molding the yoke portion inside. In an embodiment, an upper surface of the cover can 100 is formed with an opening 120 through which a lens of the lens unit 10 accommodated in the mover 200 is exposed, and the cover can is opened in the opening 120 (100) The inner yoke 130 may be formed to be bent inward. The inner yoke 130 may be located in the groove 215 formed in the bobbin 210 to be described later. The inner yoke 130 is located in the groove 215 of the bobbin 210, and has an advantage of preventing rotation and magnetic flux in the optical axis direction of the bobbin 210.

On the other hand, the mover 200 is provided on the upper side of the base 400 and includes a bobbin 210 for fixing the lens unit 10 and a coil unit 220 provided on an outer surface of the bobbin 210. do.

The mover 200 fixes the lens unit 10 to be positioned therein, and the mover 200 including the lens unit 10 moves to adjust the focus of the image.

Here, adjusting the focus of the image means an AF (Auto Focusing) function when moving the lens unit 10 in the z-axis direction, which is an optical axis direction, for short or long-distance focusing of the subject, or the z for image stabilization It may mean an optical image stabilization (OIS) function for moving the lens unit 10 in the x- and y-axis directions, which is an axial direction and a vertical direction, or a function capable of simultaneously performing the AF function and the OIS function. .

That is, the actuator unit 100 may be implemented in an A.F (Auto Focusing) type, a ㄸ or an OIS (Optical Image Stabilization) type, or a type in which the A.F type and the OIS type are simultaneously implemented.

The lens unit 10 may be a lens barrel including at least one lens, and is not limited thereto, and any holder structure capable of supporting the lens may be included. The embodiment will be described, for example, when the lens unit 10 is a lens barrel. The lens unit 10 is installed on the upper side of the base 400, which will be described later, and is disposed at a position corresponding to an image sensor, which will be described later. The lens unit 10 is provided with one or more lenses (not shown). The lens unit 10 may be thread-bonded to the inner circumferential surface of the bobbin 210, which will be described later, or threadlessly coupled using an adhesive 600 or the like.

Specifically, the bobbin 210 has a first winding guide part 211 and a second winding guide part 212 for guiding the winding of the coil part 220 to be described later on the upper and lower ends of the outer surface. have. The first winding guide part 211 and the second winding guide part 212 may be integrally formed with the outer surface of the bobbin 210, and continuously formed or predetermined along the outer surface of the bobbin 210. It can be formed spaced apart at intervals. In addition, either of the first winding guide part 211 or the second winding guide part 212 may be formed, or a coil part previously wound without a separate winding guide part may be fixed to the bobbin.

In addition, the upper side of the bobbin 210 is formed to protrude at a predetermined interval so as to contact the upper side of the cover can 100 during external impact, it is possible to absorb the impact and guide the upper spring 510. The stopper 213 may be formed, which may be formed of at least two or more. The stopper 213 may be integrally formed with the bobbin 210. In addition, the stopper 213 may be formed on the upper side of the first winding guide part 211.

In addition, a lower fastening protrusion 214 to which a lower spring 520 provided to support the bobbin 210 is fastened from an upper side of the base 400 to be described later may be formed on the lower side of the bobbin 210. have.

In addition, the bobbin 210 has a groove 215 formed on an outer circumferential surface so that the inner yoke 130 of the cover can 100 to be described later is located between the bobbin 210 and the coil portion 220 wound on the bobbin. ) May be further included.

The coil part 220 may be guided by the first winding guide part 211 and the second winding guide part 212 to be wound on the outer surface of the bobbin 210, but four individual coils may be provided on the bobbin ( 210) may be disposed at an interval of 90° on the outer surface. In addition, the pre-winded coil portion may be fixed to the outer surface of the bobbin. When viewed in a plan view, the shape of the coil part may be all of a circle, a square, and a square including a circle. In the case of a square, a square, hexagon, or octagon may be used. The coil unit 220 receives an electric power applied from a printed circuit board to be described later to form an electromagnetic field.

The stator 300 may include a magnet part 310 provided opposite the outer side of the coil part 220 and a housing 320 for fixing the magnet part 310.

As shown, in the case of the electronic AF (Auto Focusing) type, the actuator unit is provided on the magnet portion 310 provided on the side of the housing 320 to be described later, and the outer peripheral surface of the body of the bobbin 210 and the magnet portion It includes a coil portion 220 provided at a position corresponding to the inner surface of the (310). In addition, a yoke portion for fixing the magnet portion 310 may be included, and in an embodiment, the yoke portion may be a cover can.

Here, the yoke portion may be implemented as a cover can 100 or may be implemented as an additional component, although not shown.

In the case of the latter not shown, the OIS (Optical Image Stabilization) type, although not shown, the OIS coil unit (not shown) provided in the base 400 to be described later to be positioned to correspond to the lower surface of the magnet unit 310 And, the OIS coil portion is disposed may further include a substrate provided on the upper side of the base 400 to receive power, the substrate may be an FPCB (not shown). The base 400 or the substrate may further include a hall sensor unit (not shown) provided at a position corresponding to the magnet unit 310. Of course, the hall sensor unit may be electrically connected to the substrate, and may be connected to an external power supply or an OIS control unit of the camera module to transmit a signal to the OIS driving.

The coil part 220 is fixed to the bobbin and moves the lens part 10 up and down in the optical axis direction by moving the bobbin up and down, and the OIS coil part moves the lens part 10 in a direction perpendicular to the optical axis direction. Can be moved.

Here, the coil unit 220 may be supplied with power from a printed circuit board, and the OIS coil unit may be disposed on a substrate provided on an upper side of the base 400 (not shown) to receive power by the substrate. On the other hand, when considering the miniaturization of the actuator, specifically, lowering the height in the z-axis direction, which is the optical axis direction, the OIS coil part may be formed of a patterned coil.

In the case of the latter OIS (Optical Image Stabilization) type, the hall sensor unit provided for sensing the strength of the magnetic field according to the magnet position to detect the movement of the magnet unit 310 is provided to precisely control the actuator. .

In addition, the hall sensor unit is disposed in a straight line on the magnet unit 310 and the z-axis, and detects displacements of the x-axis and y-axis. The hall sensor unit is provided adjacent to the OIS coil unit than the magnet unit 310, but considering that the strength of the magnetic field formed in the magnet is several hundred times greater than that of the electromagnetic field formed in the coil, the magnet unit 310 moves. The influence of the OIS coil section on detection is not considered. In addition, in the case of the OIS type, a separate second substrate is disposed on the upper surface of the housing so that the housing 320 is positioned relative to the first substrate on which the hall sensor is disposed, the first substrate and the second The substrate may be connected to a separate wire member or an elastic member such as a plate spring, and the elastic member may be formed of a conductive material for electrical signal transmission to an AF coil or OIS coil.

In addition, the actuator according to the embodiment of the present invention may further include an elastic unit (500).

The elastic unit 500 includes an upper spring 510 and a lower spring 520.

The upper spring 510 and the lower spring 520 may be made of a plurality of springs disposed at each corner of the housing 320, but a single plate is bent and cut as shown for production efficiency. It is preferably made of plate spring.

Accordingly, the upper spring 510 and the lower spring 520 are substantially ring-shaped, and the inner circumference may be circular to correspond to the shape of the moving part 300, and the outer circumference may be the housing 320 and the base. It may be made of a square shape to be supported on the shape of the (400), the inner and outer peripheral shape is not limited to this, it is possible to change a variety of shapes.

The upper spring 510 is fastened to the upper surface of the housing 320 and the upper surface of the bobbin 210 to support the bobbin 210, and the housing 320 to provide a return force when the bobbin 210 moves upward. ). In addition, the upper spring 510 is disposed at the upper end of the housing 320, protrudes a predetermined width in the inner circumferential direction from the opening formed in the upper end, and the protruding portion supports the upper end side of the moving part 300. .

At least one or more upper fastening holes 511 or upper fastening grooves are formed in the upper spring 510, and upper fastening holes corresponding to the upper fastening holes 511 or upper fastening grooves are formed on the upper side of the housing 320. The protrusion 321 may be formed.

Meanwhile, the rim side of the lower spring 520 is disposed or supported on the upper surface of the base 400, and the inner circumferential side supports the lower end side of the moving part 300. The lower spring 520 may be provided with a lower fastening hole 521 or a lower fastening groove to support the lower side of the bobbin 210, and at this time, a fastening hole or fastening protrusion coupled with the fastening groove at the lower side of the bobbin. Can be formed. In addition, a terminal portion 522 bent in the direction of the base 400 may be formed on one side of the lower spring 520, and the terminal portion 522 is a terminal hole 420 or a side surface formed in the base 400 to be described later. Alternatively, it may be electrically connected to a printed circuit board (not shown) by exposure bonding through a groove, such as soldering. Power applied to the terminal unit 522 is connected to both ends of the coil wound on the bobbin 210, respectively, to transmit an electrical signal.

3 and 4, the housing 320 is formed of an insulating material, and is preferably made of an injection material in consideration of productivity.

Specifically, the housing 320 may be formed in a shape corresponding to the inner surface of the cover can 100 forming the appearance of the actuator. In an embodiment, the housing 320 may be formed in a hexahedral shape corresponding to the shape of the cover can 100, and the upper and lower sides may be opened to cover the lens unit 10 and the mover 200.

In addition, the housing 320 may include a magnet part fastening hole 322 or a magnet part fastening groove formed on a side surface in a shape corresponding to the magnet part 310. That is, the illustrated magnet part 310 is formed of four magnets in a rectangular shape, and the magnet part fastening holes 322 or magnet part fastening grooves may be formed in a rectangular shape corresponding to the four magnets. have.

In addition, the housing 320 is formed on the lower surface of the fastening hole 322 of the magnet part, the adhesive 600 for fixing the magnet part 310 to the magnet fastening hole 322 is introduced two The above first bonding hole 323 may be included. In the embodiment, since the magnet part 310 is composed of four magnets, four first bonding holes 323 are formed under the magnet part fastening holes 322. The first bonding hole 323 is formed from the lower surface of the housing 320 to the magnet fastening hole 322. Referring to FIG. 3, the first bonding hole 323 may be formed as a groove that is recessed from the outer surface of the housing 320. At this time, the first bonding hole 323 may be a first groove. Meanwhile, the second bonding hole 324 may be a second groove. Alternatively, the second bonding hole 324 may be referred to as a first groove and the first bonding hole 323 may be referred to as a second groove.

Referring to FIG. 5, the first bonding hole 323 further secures the magnet portion 310 inserted and fastened to the magnet portion fastening hole 322, so that an appropriate amount of adhesive 600 can be used. Thus, it can have an excellent effect in terms of reliability that occurs when the amount of the adhesive 600 is excessive or less as in the prior art. Here, the first bonding hole 323 may be formed as a hole penetrated from the lower side of the housing 320 to the magnet fastening hole 322 to fix the magnet part 310, but is illustrated As described above, it is open toward the outside of the housing 320 and may be formed to be closed by the inner circumferential surface of the cover can 100. In the latter case, the bonding of the magnet part 310 and the magnet part fastening hole 322 as well as the bonding of the housing 320 and the cover can 100 when bonding to the first bonding hole 323 according to the embodiment Bonding can also be performed to achieve a more secure fixing.

In addition, the housing 320 is formed between the first bonding hole 323, the second bonding hole 324 into which the adhesive 600 for fixing the cover can 100 and the base 400 flows in It may include. The second bonding hole 324 according to the embodiment is open toward the outside of the housing 320 like the first bonding hole 323 and is formed to be closed by the inner circumferential surface of the cover can 100. The adhesive 600 filled in the second bonding hole 324 firmly bonds the cover can 100 and the housing 320 and is adhered to the upper surface of the base 400 to securely fasten the actuator. Make it possible. Here, the larger the application area of the adhesive 600 is, the more preferable it is for solid bonding with the base 400. Accordingly, the second bonding holes 324 may be formed at corners of the housing 320 having a relatively fastening area with the base 400, respectively. As illustrated in FIG. 2, the second bonding hole 324 of the housing 320 may be disposed at a position corresponding to the fixing protrusion 440 of the base 400 in the optical axis direction.

Meanwhile, the base 400 may be disposed under the housing 320. The base 400 may perform a sensor holder function to protect an image sensor (not shown), which will be described later. In this case, in order to position the IR filter (not shown), between the driver 100 and the printed circuit board It may be provided. Also, depending on the design, the base may be formed without a sensor holder function.

In this case, the IR filter may be mounted on the hollow portion 430 formed in the center of the base 400. The IR filter may be provided with an infrared filter. In addition, the IR filter may be formed of, for example, a film material or a glass material, and an infrared ray blocking coating material or the like may be disposed on a plate-shaped optical filter such as a cover glass for protecting an imaging surface or a cover glass.

In addition, the base 400 may be formed with two or more fixing protrusions 440 protruding from the upper edge and interviewing the inner surface of the cover can 100, and such fixing protrusions 440 may include the cover cans ( 100) Easily guide the fastening and at the same time make it possible to secure a firm fixation after fastening. The fixed protrusion 440 may be a protrusion.

In addition, the base 400 may be formed with a fastening groove 410 into which the fastening piece 110 of the cover can 100 is inserted. The fastening groove 410 is formed locally on the outer surface of the base 400 in a shape corresponding to the length of the fastening piece 110, or a predetermined bottom of the cover can 100 including the fastening piece 110 It can be formed entirely on the outer surface of the base 400 so that the portion can be inserted.

In addition, the actuator according to an embodiment of the present invention may be implemented as a camera module, in this case may further include a printed circuit board, a filter and an image sensor.

The printed circuit board may be disposed under the base 400. In the printed circuit board, an image sensor (not shown) is mounted in the center of the upper side, and various elements (not shown) for driving the actuator can be mounted. In addition, the printed circuit board is electrically connected to the terminal unit 522 described above to apply power to the actuator unit 100 to drive the actuator unit 100 to be described later.

The image sensor (not shown) may be mounted on one or more lenses (not shown) accommodated in the lens unit 10 in the center of the upper surface of the printed circuit board so as to be positioned along the optical axis direction. The image sensor converts the optical signal of the object incident through the lens into an electrical signal.

On the other hand, the adhesive 600 may be implemented with a thermosetting epoxy or UV epoxy, and is cured by exposure to heat or UV. Here, the thermosetting epoxy is a method of curing by applying heat directly or indirectly, and UV (ultraviolet) epoxy is a method of curing by applying UV (ultraviolet rays) to the adhesive 600.

In an embodiment, the adhesive 600 may be an epoxy in which thermal curing and UV (ultraviolet) curing can be mixed, and both thermal curing and UV (ultraviolet) curing are possible and thus can be selected and cured by any one of them. have. The adhesive 600 is not limited to the epoxy and can be replaced with any material that can be adhered.

In short, in the embodiment of the present invention, since the moving part, the driving part, and the housing are accommodated in the cover can, the adhesive can be applied to the first bonding hole and the second bonding hole formed on the lower surface of the housing in one step. Productivity is improved by reducing production facilities and personnel, and there is an advantage in that reliability and durability are improved due to rapid adhesion between components due to a reduction in resin separation due to long-term adhesive neglect.

The actuator according to this embodiment may be implemented as a camera module, and may be provided in a mobile phone.

As described above, those skilled in the art from the above description will be able to see that various changes and modifications can be made without departing from the technical spirit of the present invention, and the technical scope of the present invention is not limited to the contents described in the Examples, but claims It should be determined by the scope and its equivalent.

100: cover can 200: mover
210: bobbin 220: coil part
300: stator 310: magnet part
320: housing 323: first bonding hole
324: second bonding hole 400: base
500: elastic unit 510: upper spring
520: lower spring 600: adhesive

Claims (20)

A cover can comprising a top plate and a side plate extending downward from an outer circumference of the top plate;
A bobbin disposed in the cover can;
A housing disposed between the bobbin and the cover can;
A base disposed under the bobbin and coupled with the side plate of the cover can;
A coil disposed on the bobbin;
A magnet disposed between the coil and the side plate of the cover can and facing the coil; And
And a lower spring connecting the bobbin and the base,
At least a portion of the lower spring is disposed on the upper surface of the base,
The base includes a protrusion protruding from a corner area of the upper surface of the base and contacting an inner surface of the side plate of the cover can,
The housing includes a first groove formed at a position corresponding to the projection and the optical axis direction of the base,
A lens driving actuator in which an adhesive is disposed in the first groove of the housing. According to claim 1,
The first groove of the housing forms a space between the housing and the side plate of the cover can,
At least a portion of the projection of the base is a lens-driven actuator disposed in the space. According to claim 1,
The adhesive is a lens driving actuator for fixing the cover can, the housing and the base. According to claim 1,
The first groove of the housing is opened toward the outside of the housing and the lens driving actuator is closed by the inner surface of the side plate of the cover can. According to claim 1,
The projection of the base is formed in each of the four corner areas of the upper surface of the base lens-driven actuator. According to claim 1,
The side plate of the cover can includes four side plates,
The housing includes four side portions corresponding to the four side plates of the cover can, and a magnet fastening hole formed in each of the four side portions,
The magnet is disposed in the magnet fastening hole,
Each of the four sides of the housing includes a lower frame disposed between the magnet and the base, and a second groove recessed from an outer surface of the lower frame,
The second groove of the housing is a lens driving actuator formed from the lower surface of the lower frame of the housing to the magnet fastening hole. The method of claim 6,
A lens driving actuator in which an adhesive is disposed in the second groove of the housing. The method of claim 7,
The magnet is a lens driving actuator that is fixed to any one or more of the side plate of the housing and the cover can by the adhesive. The method of claim 7,
The side portion of the housing is a lens driving actuator that is fixed to the side plate of the cover can by the adhesive. According to claim 1,
The first groove of the housing is a lens driving actuator formed in a corner of the housing. According to claim 1,
The cover can is a lens-driven actuator formed of a metal material. According to claim 1,
The cover can includes a fastening piece extending from the bottom of the side plate of the cover can,
The base is formed on the outer surface of the base and a lens driving actuator including a fastening groove into which the fastening piece is inserted. According to claim 1,
The cover can includes an inner yoke extending downward from an inner circumference of the top plate of the cover can,
The bobbin includes a groove portion recessed in the outer surface of the bobbin,
The inner yoke is disposed in the groove portion of the bobbin,
At least a portion of the inner yoke is a lens-driven actuator disposed between the bobbin and the coil. The method of claim 6,
The second groove of the housing is a lens-driven actuator formed at a position corresponding to the lower surface of the magnet. The method of claim 6,
The lower frame of the housing includes a portion having a smaller thickness in a direction corresponding to the thickness of the magnet by the second groove of the housing. Printed circuit boards;
An image sensor disposed on the printed circuit board;
The lens driving actuator according to any one of claims 1 to 15; And
A camera module including a lens coupled to the bobbin of the lens driving actuator and disposed at a position corresponding to the image sensor. A mobile terminal comprising the camera module of claim 16. A cover can comprising a top plate and a side plate extending downward from an outer circumference of the top plate;
A bobbin disposed in the cover can;
A housing disposed between the bobbin and the cover can;
A base disposed under the bobbin and coupled with the side plate of the cover can;
A coil disposed on the bobbin;
A magnet disposed between the coil and the side plate of the cover can and facing the coil; And
And a lower spring connecting the bobbin and the base,
At least a portion of the lower spring is disposed on the upper surface of the base,
The base includes a fixing protrusion protruding from a corner region of the upper surface of the base and contacting an inner surface of the side plate of the cover can,
The housing includes a bonding hole formed on a lower surface of the housing and an adhesive is disposed,
The bonding hole of the housing is a lens driving actuator disposed at a position corresponding to the fixing protrusion of the base and the optical axis direction. The method of claim 18,
The bonding hole of the housing forms a space between the housing and the side plate of the cover can,
At least a part of the fixed projection of the base is a lens-driven actuator disposed in the space. A cover can comprising a top plate and a side plate extending downward from an outer circumference of the top plate;
A bobbin disposed in the cover can;
A housing disposed between the bobbin and the cover can;
A base disposed under the bobbin and coupled with the side plate of the cover can;
A coil disposed on the bobbin; And
A lens-driven actuator disposed between the coil and the side plate of the cover can and including a magnet facing the coil.

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