KR102203191B1 - Voice coil motor - Google Patents

Abstract

The voice coil motor includes a movable member including a bobbin having a hollow to which a lens is mounted and a coil block disposed on an outer peripheral surface of the bobbin; An elastic member elastically coupled to the bobbin; And a housing including a top plate exposing the hollow, a side plate extending from an edge of the top plate to surround the mover and having a storage hole, and a stator including a flat magnet fixed to the storage hole, wherein the housing is the It includes a separation preventing portion for preventing the flat magnet from being separated from the side plate in a direction toward the coil block.

Description

Voice coil motor {VOICE COIL MOTOR}

The present invention relates to a voice coil motor.

BACKGROUND ART In recent years, a camera module for storing an image or a video is installed in a portable communication device, and the camera module includes an image sensor module that converts external light into an image and a lens that focuses external light on the image sensor module.

Conventional camera modules cannot adjust the distance between the lens and the image sensor module, so it is difficult to obtain a high-quality image desired by the user. Recently, a voice coil motor capable of adjusting the distance between the lens of the camera module and the image sensor module has been developed.

Conventional voice coil motors have an image sensor mounted on the rear side of a base with an opening, a bobbin disposed on the base and mounted with a lens, a coil block wound around the bobbin and a magnet facing the coil block, a yoke and a bobbin fixing the magnet. It includes an elastic member that is elastically supported, and adjusts the distance between the lens mounted on the bobbin and the image sensor module using the attractive force and repulsive force generated by the action of the magnetic field generated from the coil block and the magnet fixed to the yoke.

The magnet of the conventional voice coil motor is formed in a triangular pillar shape, and the triangular pillar-shaped magnet is disposed in a diagonal direction with respect to the coil block. When a magnet formed in a triangular column shape is used, the size of the magnet is increased, the position and arrangement of the magnet can be easily changed, and the overall size of the voice coil motor is increased because the magnet must be placed on the inner side of the yoke.

The present invention provides a voice coil motor in which a magnet for driving a bobbin is changed into a flat magnet shape and coupled to a designated position of a housing, and the flat magnet is prevented from being separated from the housing.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. will be.

In one embodiment, the voice coil motor includes a mover including a bobbin having a hollow to which a lens is mounted and a coil block disposed on an outer peripheral surface of the bobbin; An elastic member elastically coupled to the bobbin; And a housing including a top plate exposing the hollow, a side plate extending from an edge of the top plate to surround the mover and having a storage hole, and a stator including a flat magnet fixed to the storage hole, wherein the housing is the It includes a separation preventing portion for preventing the flat magnet from being separated from the side plate in a direction toward the coil block.

According to the voice coil motor according to the present invention, a plate-shaped flat magnet facing the coil block and generating a magnetic field is formed in a receiving hole formed on the side plate of the housing, and a separation preventing part for preventing the flat magnet from being separated from the side plate To further improve the performance of the voice coil motor.

1 is an exploded perspective view of a voice coil motor according to an embodiment of the present invention. 2 is an assembly cross-sectional view of FIG. 1.
3 is a cross-sectional view taken along line II′ of FIG. 1.
4 to 6 are front views of the side plate of FIG. 3.
7 is a cross-sectional view showing another embodiment of a separation preventing unit of a housing according to an embodiment of the present invention.
8 is a cross-sectional view showing another embodiment of a separation preventing portion of a housing according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms specifically defined in consideration of the configuration and operation of the present invention may vary according to the intention or custom of users or operators. Definitions of these terms should be interpreted as meanings and concepts consistent with the technical idea of the present invention based on the contents throughout the present specification.

1 is an exploded perspective view of a voice coil motor according to an embodiment of the present invention. 2 is an assembly cross-sectional view of FIG. 1.

Referring to FIGS. 1 and 2, the voice coil motor 800 includes a mover 200, an elastic member 300 and 400, and a stator 600. In addition, the voice coil motor 800 further includes a base 100 and a cover can 700.

The mover 200 includes a bobbin 210 and a coil block 250.

The bobbin 210 is formed in a cylindrical shape having a hollow 212, and a lens (not shown) is mounted on the inner surface of the bobbin 210.

On the outer circumferential surface of the bobbin 210, curved portions 214 and flat portions 216 are alternately formed, and in one embodiment of the present invention, four curved portions 214 and flat portions 216 are formed alternately. do.

A bond tank 215 for fixing the coil block 250 to be described later is formed on the curved portion 214 formed on the outer circumferential surface of the bobbin 210, and the bond tank 215 is formed concave from the curved portion 214. It has a set shape.

In one embodiment of the present invention, although it is shown and described that the bond tank 215 is formed on the curved portion 214, the bond tank 215 may be formed on the flat portion 216.

On the other hand, a part of the upper end of each curved portion 214 formed on the outer circumferential surface of the bobbin 210 is cut to form a stepped jaw 214a formed on the curved portion 214 of the bobbin 210, and a bond tank ( 215 is in communication with the locking jaw (214a).

A support part 218 for supporting a coil block 250 to be described later is formed at the lower end of the outer circumferential surface of the bobbin 210, and the support part 218 protrudes in a rib shape along the lower end of the outer circumferential surface of the bobbin 210 do. A part of the support part 218 may include a cutout part 219 whose part is cut so that both ends of the coil block 250 to be described later can pass.

The coil block 250 included in the mover 200 is formed in a cylindrical shape, and the coil block 250 is formed by winding a wire coated with an insulating resin such as enamel resin in a cylindrical shape.

The coil block 250 may be wound in a cylindrical shape and inserted into the outer peripheral surface of the bobbin 210. Alternatively, the coil block 250 may be wound directly on the outer peripheral surface of the bobbin 210.

The coil block 250 disposed on the outer circumferential surface of the bobbin 210 is adhered to the bobbin 210 by an adhesive provided by the bond tank 215.

Both ends 252 and 254 of the coil block 250 disposed on the outer circumferential surface of the bobbin 210 protrude to the lower surface of the bobbin 210 through the cutout 219 of the support part 218 formed in the bobbin 210.

Both ends 252 and 254 of the coil block 250 protruding from the bottom surface of the bobbin 210 through the cutout 219 of the support part 218 are the first elastic members 300 among the elastic members 300 and 400 to be described later. And are electrically connected.

The elastic members 300 and 400 include a first elastic member 300 and a second elastic member 400. The first elastic member 300 is coupled to the lower surface of the bobbin 210, and the second elastic member 400 is disposed on the upper surface of the bobbin 210.

A pair of first elastic members 300 are disposed on the lower surface of the bobbin 210, and the pair of first elastic members 300 serve to elastically support the lower surface of the bobbin 210. The pair of first elastic members 300 disposed on the lower surface of the bobbin 210 are spaced apart from each other and are not electrically contacted with each other.

The pair of first elastic members 300 coupled to the lower surface of the bobbin 210 may be formed by etching or pressing a conductive metal plate, respectively.

The pair of first elastic members 300 are formed in a shape symmetrical with respect to the center of the bobbin 210. Each of the pair of first elastic members 300 includes an inner elastic portion 302, an outer elastic portion 304, and a connection elastic portion 306.

Each inner elastic part 302 is formed in a semicircular plate shape when viewed from the top, and through holes 303 are formed in the inner elastic part 302 to be coupled to the boss 213 formed on the lower surface of the bobbin 210 do. The inner elastic parts 302 are fixed to the lower surface of the bobbin 210.

Each inner elastic portion 302 is electrically connected to both ends 252 and 254 of the coil block 250, respectively. For example, the inner elastic parts 302 are electrically connected to both ends 252 and 254 of the coil block 250 using solder.

The outer elastic portions 304 are disposed outside the inner elastic portion 302, and the outer elastic portions 304 are formed in a semicircular plate shape when viewed in plan view. The outer elastic portion 304 is formed with a through hole 305 coupled to the boss 130 formed on the upper surface 110 of the base 100 to be described later.

The connection elastic portion 306 elastically connects the inner elastic portion 302 and the outer elastic portion 304, and the connection elastic portions 306 may be formed in a zigzag shape when viewed from the top to generate an elastic force. have.

In one embodiment of the present invention, the first elastic member 300 is formed with a terminal portion 310 to be electrically connected to an external circuit board.

The electrical signal provided to the terminal part 310 is provided to both ends 252 and 254 of the coil block 250 through a pair of first elastic members 300, and thereby a magnetic field is generated from the coil block 250. .

Meanwhile, a second elastic member 400 may be elastically coupled to an upper surface of the bobbin 210 on an upper surface opposite to the lower surface of the bobbin 210. The second elastic member 400 is coupled to the stroke protrusion formed in the housing of the stator to be described later.

3 is a cross-sectional view taken along line II′ of FIG. 1.

1 and 3, the stator 600 includes a flat magnet 610 and a housing 690.

The flat magnet 610 is disposed to face the coil block 250 wound on the bobbin 210, and the flat magnet 610 is formed in plural.

In an embodiment of the present invention, the flat magnet 610 is formed in a plate shape, and four flat magnets 610 are disposed perpendicular to each other.

The flat magnet 610 is formed, for example, in a rectangular plate shape having long sides 612 facing each other and short sides 614 facing each other.

The flat magnet 610 may include a single flat magnet formed of an N-pole and an S-pole, or a stacked flat magnet in which at least two single magnets formed of an N- and S-pole are stacked. Unlike this, the flat magnet 610 may include a 4-pole flat magnet in which an N-pole-S-pole-N-pole-S-pole is formed.

In one embodiment of the present invention, a surface of the flat magnet 610 facing the coil block 250 is defined as a front surface 601, and a surface facing the front surface 601 of the flat magnet 610 is a rear surface 602 ).

The housing 690 serves to fix the flat magnet 610 to face the coil block 250. In one embodiment of the present invention, the housing 690 is formed in the shape of a rectangular parallelepiped box with an open bottom surface.

The housing 690 includes an upper plate 620 and a side plate 630, and the flat magnet 610 is fixed to each side plate 630 of the housing 690.

The upper plate 620 of the housing 690 is formed in, for example, a square plate shape, and an opening 621 exposing the lens mounted on the bobbin 210 is formed in the central portion of the upper plate 620, and the housing ( The side plate 630 of the upper plate 620 extends in a direction surrounding the bobbin 210 from the four edges of the upper plate 620, and thus, the housing 690 is formed in a rectangular box shape with an open bottom surface.

On the other hand, the stopper portion 628 protrudes from the inner surface formed by the opening 621 formed in the upper plate 620 of the housing 690, the stopper portion 628 is a curved portion 214 of the outer peripheral surface of the bobbin 210 ) Is formed in a position corresponding to each of the locking projections (214a) formed in. The stopper part 628 is in contact with the locking projection 214a of the raised bobbin 210 to limit the stroke length of the bobbin 210.

In an embodiment of the present invention, the stopper part 628 may be formed as a curved surface having a curvature similar to or equal to the outer peripheral surface of the bobbin 210 when viewed in a plan view.

The stroke protrusion 640 protrudes from the upper plate 620 of the housing 690. The stroke protrusions 640 are formed at respective diagonal corners of the upper plate 620, and the stroke protrusions 640 may be formed at each corner of the upper plate 620.

The stroke protrusion 640 serves to secure a stroke space of the bobbin 210 and fix the second elastic member 400.

The stroke protrusions 640 formed at each corner of the upper plate 620 of the housing 690 are formed in a pair, and the pair of stroke protrusions 640 are mutually symmetrical with respect to the central portion of the stroke protrusion 640 Is formed by

In one embodiment of the present invention, a pair of stroke protrusions 640 may be formed in a shape similar to a semicircular column. Alternatively, the pair of stroke protrusions 640 may be formed in various shapes, such as a square pillar and a polygonal pillar.

Although in one embodiment of the present invention, it is shown and described that a pair of stroke protrusions 640 are formed at each corner of the upper plate 620 of the housing 690 in a mutually symmetrical shape. The stroke protrusions 640 of may be formed at each corner of the upper plate 620 of the housing 690 in a mutually asymmetric shape.

On the other hand, on the upper plate 620 of the housing 690, a bond tank portion 625 is formed in a trench shape along the periphery of the stroke protrusion 640, and an adhesive is provided to the bond tank portion 625, and manufactured by the adhesive. 2 The elastic member 400 is adhered to the upper plate 620 of the housing 690.

Meanwhile, a coupling protrusion 627 is formed at a position adjacent to the stroke protrusion 640 of the upper plate 620 of the housing 690. The coupling protrusion 627 is formed at a position adjacent to each stroke protrusion 640.

The coupling protrusion 627 allows the second elastic member 400 to be coupled to the housing 690 in a designated direction, and the diagonal coupling protrusions 627 formed on the upper plate 620 of the housing 690 are a second elastic member ( In order to prevent the 400) from being coupled to the housing 690 in an unspecified direction, it is formed in an asymmetric shape with respect to the center of the upper plate 620.

A storage hole 635 penetrating through each side plate 630 is formed in the center of each side plate 630 of the housing 690, and the flat magnet 610 is formed by using the storage hole 635. It is coupled to the side plate 630 of.

4 to 6 are front views of the side plate of FIG. 3.

1, 3 and 4, each side plate 630 of the housing 690 includes a flat magnet 610 accommodated in the storage hole 635 of each side plate 630 is a coil block 250 It includes a departure preventing portion 636 for preventing separation in the direction toward.

Departure prevention unit 636 prevents the malfunction of the mover 200 caused by the flat magnet 610 deviated in the direction toward the coil block 250 and the flat magnet 610 interferes with the coil block 250 do.

The departure prevention part 636 extends from the inner surface 631 of the side plate 630 into the receiving hole 635 and the separation prevention part 636 is formed to have a thin thickness so as not to interfere with the coil block 250.

The departure prevention part 636 is in contact with both edges of the front surface 601 of the flat magnet 610, for example, and in order to implement this, the separation prevention part 636 is an inner side of the side plate 630 ( It protrudes toward both edges of the front surface 601 of the flat magnet 610 from 631).

In an embodiment of the present invention, when the separation prevention part 636 extends from the inner surface 631 of the side plate 630 into the storage hole 635, the thickness of the flat magnet 610 is the separation prevention part ( Since the thickness of 636 is not affected, the flat magnet 610 may be formed to have substantially the same thickness as the thickness of the side plate 630. Further, in an embodiment of the present invention, the outer surface of the side plate 630 is disposed on the same plane as the rear surface 602 of the flat magnet 610.

As shown in FIG. 4, the departure prevention part 636 may be formed in a first direction FD parallel to the axial direction of the bobbin 210 and parallel to the short side 614 of the flat magnet 610.

On the other hand, as shown in Figure 5, the departure prevention part 636 is parallel to the upper plate 620 of the housing 690, parallel to the long side 612 of the flat magnet 610, and perpendicular to the first direction (FD). It may be formed in the second direction SD.

Meanwhile, as shown in FIG. 6, the departure prevention part 636 is parallel to the axial direction of the bobbin 210 and parallel to the short side 614 of the flat magnet 610 and the first direction FD and the housing 690 It may be formed in a second direction SD that is parallel to the upper plate 620 of, parallel to the long side 612 of the flat magnet 610, and perpendicular to the first direction FD.

7 is a cross-sectional view showing another embodiment of a separation preventing unit of a housing according to an embodiment of the present invention.

Referring to FIG. 7, the separation prevention part 637 formed in the side plate 630 of the housing 690 protrudes from the receiving surface 635a formed by the receiving hole 635 penetrating each side plate 630 , The separation prevention portion 637 is formed to be thinner than the thickness of the side plate 630, and the separation prevention portion 637 supports both edges of the front surface 601 of the flat magnet 610.

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The thickness of each flat magnet 610 is formed by subtracting the thickness of the separation prevention part 637 from the thickness of the side plate 630 by the separation prevention part 637 shown in FIG. 7. Further, in an embodiment of the present invention, the outer surface of the side plate 630 is disposed on the same plane as the rear surface 602 of the flat magnet 610.

8 is a cross-sectional view showing another embodiment of a separation preventing portion of a housing according to an embodiment of the present invention.

Referring to FIG. 8, the separation prevention part 637 formed on the side plate 630 of the housing 690 protrudes from the receiving surface 635a formed by the receiving hole 635 penetrating each side plate 630. , The thickness of the departure preventing part 637 is formed to be thinner than the thickness of the side plate 630.

When the departure preventing portion 637 protrudes from the receiving surface 635a, the thickness of the flat magnet 610 is affected by the separation preventing portion 637. In an embodiment of the present invention, in order to prevent the thickness of the flat magnet 610 from being reduced by the separation prevention unit 637, the flat magnet 610 in contact with the separation prevention unit 637 includes a separation prevention unit 637 A receiving groove 613 is formed to accommodate the. By forming the receiving groove 613 in the flat magnet 610, the flat magnet 610 is formed to have substantially the same thickness as the side plate 630 regardless of the separation preventing portion 637.

Further, in an embodiment of the present invention, the outer surface of the side plate 630 is disposed on the same plane as the rear surface 602 of the flat magnet 610.

In the side plate 630 of the housing 690, coupling grooves 626 that are coupled to the coupling pillars 120 formed at each corner of the upper surface 110 of the base 100 to be described later are formed.

Socket grooves 638 are formed on both sides of the storage holes 635 of the pair of side plates 630 facing the side plates 630 of the housing 690, respectively, and voice coils using the socket grooves 638 The motor 800 is coupled to a socket of an external circuit board.

The cover can 700 includes a cover can top plate 710 and a cover can side plate 720. In an embodiment of the present invention, the cover can 700 may be formed by processing a metal plate capable of blocking magnetic fields or harmful electromagnetic waves.

The cover can upper plate 710 includes an opening corresponding to the hollow of the bobbin 210, and the inner surface of the cover can upper plate 710 has each stroke protrusion protruding from each corner of the upper plate 620 of the housing 690 ( 640).

The cover can side plate 720 extends from the edge of the cover can top plate 710 in a direction covering the side plate 630 of the housing 690, and the cover can side plate 720 is a side plate ( It is in contact with the rear surface 602 of each flat magnet 610 coupled to the receiving hole 635 of the 630.

Since the rear surface 602 of the flat magnet 610 comes into contact with the inner surface of the cover can side plate 720, the flat magnet 610 cannot flow forward or backward from the side plate 630 of the housing 690.

The cover can side plate 720 blocks magnetic fields leaking from the flat magnet 610 and blocks harmful electromagnetic waves. The rear surface 602 of the flat magnet 610 and the cover can side plate 720 may be bonded to each other by a bond.

When the socket groove 638 is formed in the side plate 630 of the housing 690, the cover can side plate 720 covering the side plate 630 of the housing 690 is cut to expose the socket groove 638 A portion 725 is formed.

The base 100 serves to fix the bobbin 210, the first elastic member 300, the stator 600, and the cover can 700.

The base 100 is formed, for example, in the shape of a rectangular parallelepiped plate in which an opening 105 is formed in the center, and an image sensor module (not shown) is mounted on the rear surface of the base 100. An IR filter disposed in front of the image sensor module may be disposed on the rear surface of the base 100. The IR filter serves to remove infrared rays contained in external light.

The rear surface of the bobbin 210 coupled with the first elastic member 300 is disposed on the upper surface 110 facing the rear surface of the base 100.

Four coupling pillars 120 protruding in a direction perpendicular to the upper surface 110 are formed at four corners of the upper surface 110 of the base 100, and each coupling pillar 120 is a housing 690 It is coupled to the coupling groove 626 of.

Bosses 130 coupled to the first elastic member 300 are formed on the upper surface 110 of the base 100.

In addition, through holes 140 through which the terminal portions 310 formed in the first elastic member 300 pass are formed in the base 100.

As described in detail above, a plate-shaped flat magnet that faces the coil block and generates a magnetic field is formed in the receiving hole formed on the side plate of the housing, and a departure prevention part is formed on the side plate to prevent the flat magnet from being separated. To further improve the performance of the voice coil motor.

Although the embodiments according to the present invention have been described above, these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent ranges of embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

800...Voice coil motor 200...operator
300,400...elastic member 600...stator
700...cover can

Claims (20)

A cover including a top plate including a hole and a side plate extending from the top plate;
A bobbin disposed in the cover;
A housing disposed between the cover and the bobbin;
A coil disposed on the bobbin;
A magnet disposed in the housing and facing the coil;
A base disposed under the bobbin and coupled to the side plate of the cover; And
Including a first elastic member coupled to the upper surface of the bobbin and the base,
The housing includes a separation preventing portion disposed between the magnet and the coil and overlapping with the magnet in a direction in which the magnet faces the coil,
The side plates of the cover include first and second side plates disposed opposite to each other, and third and fourth side plates disposed opposite to each other,
The magnet includes a first magnet disposed on the first side plate of the cover,
The separation prevention part is disposed between the first magnet and the coil, a first separation prevention part disposed closer to the third side plate than the fourth side plate of the cover, and a first separation prevention part disposed between the first magnet and the coil And a second separation preventing portion disposed closer to the fourth side plate than the third side plate of the cover,
The housing is recessed from the lower surface of the housing and includes a groove formed between the first release preventing part and the third side plate of the cover, and between the second release preventing part and the fourth side plate of the cover. and,
The base is a voice coil motor including a pillar protruding from the upper surface of the base and at least partially disposed in the groove of the housing. The method of claim 1,
The magnet is a voice coil motor comprising a first surface facing the coil and a second surface disposed opposite the first surface and fixed to the side plate of the cover by an adhesive. The method of claim 1,
The coil is electrically connected to the first elastic member,
The first elastic member includes an inner elastic portion coupled to a lower surface of the bobbin, an outer elastic portion coupled to the base, and a connection elastic portion connecting the inner elastic portion and the outer elastic portion,
A terminal portion is connected to the outer elastic portion of the first elastic member,
At least a portion of the terminal portion is disposed below the outer elastic portion,
The base is a voice coil motor including a hole through which the terminal part passes. The method of claim 1,
The bobbin includes a recess concavely formed from an outer peripheral surface of the bobbin,
An adhesive is disposed in the recess of the bobbin to couple the coil to the bobbin. The method of claim 1,
The magnet is a voice coil motor that is a stacked magnet in which two single magnets formed of N and S poles are stacked up and down. The method of claim 1,
Including a second elastic member coupled to the upper surface of the bobbin,
The housing includes an upper plate on which an upper surface of the magnet is disposed, a side plate extending from the upper plate of the housing and on which both side surfaces of the magnet are disposed, and a stroke protrusion protruding from the upper plate of the housing and coupled to the second elastic member. Including,
The upper plate of the housing and the upper plate of the cover are spaced apart by the stroke protrusion,
The second elastic member includes an inner elastic portion coupled to the bobbin, an outer elastic portion coupled to the housing, and a connection elasticity connecting the inner elastic portion of the second elastic member and the outer elastic portion of the second elastic member. Includes wealth,
A voice coil motor in which the connection elastic part of the second elastic member is disposed in a space between the upper plate of the housing and the upper plate of the cover. The method of claim 1,
The base includes a boss protruding from the upper surface of the base,
The first elastic member is a voice coil motor including a hole coupled to the boss. The method of claim 1,
Including a second elastic member coupled to the upper surface of the bobbin,
The housing includes a top plate including an opening,
The upper plate of the housing includes a stopper portion overlapping at least a portion of the bobbin in the optical axis direction,
The stopper part of the housing is spaced apart from the top plate of the cover,
The bobbin includes a locking jaw adapted to contact the stopper portion of the housing,
In the initial position, an area of the bobbin coupled with the second elastic member is disposed higher than the stopper part, and the second elastic member is spaced apart from the stopper part,
The locking jaw of the bobbin is disposed at a position lower than the uppermost surface of the bobbin, and the stopper part and the locking jaw limit the movement of the bobbin upward along an optical axis. The method of claim 1,
A voice coil motor having a cutout portion exposing a portion of the side plate of the housing on the side plate of the cover. The method of claim 2,
The housing includes an upper plate disposed between the magnet and the upper plate of the cover, and a side plate extending from the upper plate of the housing along the side plate of the cover,
The separation prevention part and the groove are voice coil motors formed on the side plate of the housing. The method of claim 10,
The voice coil motor having a thickness of the magnet corresponding to a distance between the first and second surfaces of the magnet is thinner than that of the side plate of the housing in a corresponding direction. The method of claim 10,
The side plate of the housing includes an inner surface that is a surface facing the bobbin and an outer surface disposed on the opposite side of the inner surface,
The second surface of the magnet is disposed on the same plane as the outer surface of the side plate of the housing. The method of claim 1,
The magnet is a flat magnet in the shape of a flat plate,
The cover is a cover can that blocks magnetic fields or electromagnetic waves,
The separation prevention part is a voice coil motor for preventing the first magnet from being separated in a direction toward the coil. Image sensor;
The voice coil motor of claim 1; And
A camera module including a lens coupled to the bobbin of the voice coil motor and disposed at a position corresponding to the image sensor. A portable communication device comprising the camera module according to claim 14. A cover including a top plate including a hole and a side plate extending from the top plate;
A bobbin disposed in the cover;
A housing disposed between the cover and the bobbin;
A coil disposed on the bobbin;
A magnet disposed in the housing and facing the coil; And
And a base disposed under the bobbin and coupled to the side plate of the cover,
The housing includes a separation preventing portion disposed between the magnet and the coil and overlapping with the magnet in a direction in which the magnet faces the coil,
The side plates of the cover include first and second side plates disposed opposite to each other, and third and fourth side plates disposed opposite to each other,
The magnet includes a first magnet disposed on the first side plate of the cover,
The base includes a pillar protruding from the upper surface of the base,
At least a part of the pillar of the base is a first pillar disposed between the third side plate of the cover and the first magnet, and at least a part of the pillar is disposed between the fourth side plate of the cover and the first magnet It includes a second column that becomes,
The separation prevention part is disposed between the first magnet and the coil, a first separation prevention part disposed closer to the third side plate than the fourth side plate of the cover, and a first separation prevention part disposed between the first magnet and the coil And a second separation preventing portion disposed closer to the fourth side plate than the third side plate of the cover. The method of claim 16,
The magnet is a voice coil motor comprising a first surface facing the coil and a second surface disposed opposite the first surface and fixed to the side plate of the cover by an adhesive. The method of claim 16,
The housing includes a recess formed from a lower surface of the housing and formed between the first magnet and the third side plate of the cover and between the first magnet and the fourth side plate of the cover,
At least a portion of the pillar of the base is disposed in the groove of the housing. The method of claim 16,
The bobbin includes a recess concavely formed from an outer peripheral surface of the bobbin,
An adhesive is disposed in the recess of the bobbin to couple the coil to the bobbin. The method of claim 16,
The magnet is a voice coil motor that is a stacked magnet in which two single magnets formed of N and S poles are stacked up and down.

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