KR20150142196A - Lens moving unit and camera module having the same - Google Patents

Abstract

According to an embodiment of the present invention, a lens driving unit comprises: a first lens driving unit including a bobbin wherein at least one lens is installed inside and a first coil installed in an outer circumference surface, a housing to support a magnet arranged around the bobbin, and to move the bobbin and the first coil in a first direction parallel with an optical shaft by interacting between the magnet and the first coil; a second lens driving unit including a base arranged at a predetermined interval away from the bobbin and the first lens driving unit, a supporting member to support the first lens driving unit in a second and a third direction with respect to the base to be moved, and to provide power to the first coil, a second coil arranged against the magnet of the first lens driving unit, and a circuit board having a sensing magnet installed in the first lens driving unit and a detection sensor to detect a location in the second and the third direction of the second lens driving unit with respect to the base by detecting a change in magnetic field of the sensing magnet, and to move an entire first lens driving unit including the bobbin in the second and the third direction different from each other and perpendicular to an optical shaft by interaction between the magnet and the second coil; and a cover member combined with the base to cover the first and the second lens driving units. The second coil can be arranged on a lateral wall of the cover member.

Description

[0001] The present invention relates to a lens driving apparatus and a camera module having the lens driving unit.

The present embodiment relates to a lens driving apparatus and a camera module having the lens driving apparatus.

It is difficult to apply the VCM technology, which was used in the conventional camera module, to the camera module for the ultra-small and low power consumption, and related researches have been actively conducted.

In the case of a camera module mounted on a small electronic device such as a smart phone, the camera module may be frequently impacted during use, and the camera module may be slightly shaken due to user's hand movement during shooting. In view of this, in recent years, there has been a demand for development of a technique of additionally providing a camera shake preventing means on a camera module.

In the case of a technique capable of correcting the camera shake by moving the optical module in the x- and y-axes corresponding to the plane perpendicular to the optical axis, the optical system is moved in a direction perpendicular to the optical axis The structure is complicated and is not suitable for miniaturization.

The present embodiment provides a lens driving unit including a camera shake correction function that can be downsized and can improve operational reliability, and a camera module having the lens driving unit.

The lens driving unit according to the present embodiment includes a bobbin having at least one lens disposed on the inner side and a first coil disposed on the outer peripheral surface thereof and a housing for supporting a magnet disposed around the bobbin, A first lens driving unit for moving the bobbin and the first coil in a first direction parallel to the optical axis by a first coil interaction; A supporting member movably supporting the first lens driving unit in the second and third directions with respect to the base and capable of supplying power to the first coil; A sensing magnet installed in the first lens driving unit, and a sensing unit for sensing a change in the magnetic field of the sensing magnet to detect a position of the housing in the first direction with respect to the base, A second lens driving unit for moving the housing in a second direction and a third direction which are orthogonal to the optical axis and are different from each other by mutual action of the magnet and the second coil, ; And a cover member coupled to the base and surrounding the first and second lens driving units, and the second coil may be disposed on the side wall of the cover member.

And a second sensing sensor for sensing a position in the second and third directions.

Wherein the first lens driving unit comprises: an octagonal bobbin having at least four straight surfaces and a corner surface connecting them; A first coil wound on an outer circumferential surface of the bobbin; A magnet disposed at a position corresponding to a straight surface of the first coil; A housing to which the magnet is fixed; And an upper and lower elastic member, wherein the inner frame is coupled to the bobbin, and the outer frame is coupled to the housing.

The second coil may be installed on a plurality of circuit boards coupled to the inner wall of the cover member.

The housing has a first surface on which the four magnets are installed; And a second surface on which the first surfaces are interconnected and on which the support member is disposed.

The support member may be integrally formed with the upper elastic member.

Wherein the support member includes: a connection portion connected to the upper elastic member; First and second resilient deformations extending from the connection portion; And a fixing unit fixedly coupled to the base.

The supporting member may further include at least four terminal portions that support the second lens driving unit and at least two of which have different polarities.

Wherein the support member includes: a connection portion connected to the upper elastic member; First and second resilient deformations extending from the connection portion; And a fixing unit fixedly coupled to the base.

The first and second elastically deformable portions may be bent at least once to form a certain pattern.

The first and second elastic deformation parts may be any one of an N shape and a zigzag shape in which a linear portion is formed in a direction parallel to the optical axis through at least four folds.

The first and second resilient deformations may be in the form of a wire without a pattern.

The second coil may be installed on an inner surface of a circuit board provided on the inner surface of the cover member.

The second coil may be provided as a substrate having a pattern coil on an upper surface of a circuit board provided on the inner surface of the cover member, and may be stacked on the circuit board.

The second coil may be integrally formed on the inner surface of the cover member in the form of a surface electrode.

The second sensing sensor may be any one of a hall sensor and a photo reflector which are aligned with the center of the second coil and inserted into the sensing sensor mounting groove formed in the base.

A total of two second sensing sensors may be provided, and virtual lines connecting the centers of the bases and the centers of the sensing sensors may be arranged perpendicular to each other.

The magnet may be used as an auto-focusing magnet for moving the bobbin in the first direction and a magnet for correcting the shaking motion of the housing in the second and third directions.

The sensing magnet may be disposed on an upper surface of the first lens driving device.

At least one sensing magnet may be disposed on an edge of the upper surface of the bobbin.

The camera module according to the present embodiment includes an image sensor; A printed circuit board on which the image sensor is mounted; And a lens driving apparatus configured as described above.

It is possible to provide a lens driving unit including a camera shake correction function capable of reducing the height of the camera module to be small and capable of improving operational reliability.

Further, it is possible to elastically support the housing provided with the plurality of lenses through the integrated support member formed by bending a part of the upper elastic member without assembling a separate support member, thereby improving assembling performance.

Further, since the circuit board provided with the second coil on the inner surface of the cover member is provided and modularized, the assembling process can be further simplified.

1 is a schematic perspective view of a lens driving unit according to the present embodiment,
Fig. 2 is an exploded perspective view of Fig. 1,
Figure 3 is an enlarged view of the support member portion of Figure 2,
4 is a perspective view of the housing according to the present embodiment,
5 is an exploded perspective view of the cover member assembly according to the present embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of a lens driving unit according to the present embodiment, Fig. 2 is an exploded perspective view of Fig. 1, Fig. 3 is an enlarged view of a supporting member portion of Fig. And Fig. 5 is an exploded perspective view of the cover member assembly according to the present embodiment.

1 to 3, an orthogonal coordinate system (x, y, z) can be used. In the drawing, the x axis and y axis mean a plane perpendicular to the optical axis. For convenience, the optical axis direction (z axis direction) can be referred to as a first direction, the x axis direction as a second direction, and the y axis direction as a third direction .

An image stabilizer applied to a small-sized camera module of a mobile device such as a smart phone or a tablet PC is a device for preventing the outline of the photographed image from being formed due to the vibration caused by the shaking of the user at the time of shooting the still image Means a configured device. The autofocusing apparatus is a device that automatically focuses an image of an object on an image sensor surface. In this embodiment, the optical module including a plurality of lenses may be moved in a direction parallel to the optical axis, or may be moved along a plane perpendicular to the optical axis Such auto focusing operation and camera shake correction operation can be performed.

As shown in FIGS. 1 and 2, the lens driving unit according to the present embodiment may include a first lens driving unit 100 and a second lens driving unit 200. At this time, the first lens driving unit 100 is an autofocus lens driving unit, and the second lens driving unit 200 is a shake correction lens driving unit.

The first lens driving unit 100 may include a bobbin 110, a first coil 120, a magnet 130, and a housing 140, as shown in FIGS.

The bobbin 110 may be installed in the inner space of the housing 140 so as to be reciprocally movable in a direction parallel to the optical axis. A first coil 120 may be installed on the outer circumferential surface of the bobbin 110 so as to allow electromagnetic interaction with the magnet 130. Further, the bobbin 110 is elastically supported by the upper and lower elastic members 150 and 160, and can perform an auto focusing function by moving in a first direction parallel to the optical axis.

The bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed, though not shown. The lens barrel can be coupled to the inside of the bobbin 110 in various ways. For example, female threads may be formed on the inner circumferential surface of the bobbin 110, male thread corresponding to the threads may be formed on the outer circumferential surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screwing. However, the present invention is not limited thereto, and the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screwing, without forming a thread on the inner circumferential surface of the bobbin 110. Alternatively, the one or more lenses may be formed integrally with the bobbin 110 without a lens barrel. The lens coupled to the lens barrel may be composed of a single lens, or two or more lenses may be configured to form an optical system.

The upper and lower surfaces of the bobbin 110 may have a plurality of upper support protrusions and lower support protrusions. 3, the upper side support protrusions 113 may be formed in a cylindrical shape or a column shape, and the inner side frame 151 of the upper side elastic member 150 and the bobbin 110 may be coupled . According to the present embodiment, a first through hole 151a may be formed at a position corresponding to the upper side support protrusion 113 of the inner frame 151. At this time, the upper support protrusions 113 and the first through holes 151a may be fixed by heat fusion or may be fixed with an adhesive such as epoxy. The upper support protrusions 113 may be provided as shown in FIG. At this time, the distance between the respective upper support protrusions 113 can be appropriately arranged within a range in which interference with peripheral components can be avoided. That is, each of the upper support protrusions 113 may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110, and the gap between the upper support protrusions may be different from a predetermined imaginary line passing through the center of the bobbin 110 Or may be formed to be symmetrical.

The lower support protrusion may be cylindrical or prismatic like the upper support protrusion 113 as shown in FIG. 2. The inner support frame 161 of the lower elastic member 160 and the bobbin 110, As shown in Fig. According to the present embodiment, a second through hole 161a may be formed at a position corresponding to the lower support protrusion of the inner frame 161. At this time, the lower support protrusions and the second through holes 161a may be fixed by heat fusion or may be fixed with an adhesive member such as epoxy. Further, a plurality of lower support protrusions may be provided. At this time, the distance between the respective lower support protrusions can be appropriately arranged within a range in which interference with peripheral components can be avoided. That is, each of the lower support protrusions may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110.

The number of the lower support protrusions may be smaller than the number of the upper support protrusions 113. This is in accordance with the shape of the upper elastic member 150 and the lower elastic member 160. That is, as shown in FIG. 2, the upper elastic member 150 is formed in a two-part structure so as to be electrically isolated from each other to serve as a terminal for applying a current to the first coil 120 It is possible to prevent the upper elastic member 150 and the bobbin 110 from being incompletely engaged unless a sufficient number of the upper support protrusions 113 are provided and fixed. 2, since the lower elastic member 160 is formed as one body as shown in FIG. 2, the lower elastic member 160 can be stably coupled with only a small number of lower support protrusions than the upper elastic member 150. Also, contrary to the embodiment, the lower elastic member 160 may be formed as a two-divided structure isolated from each other to serve as a terminal for applying a current to the first coil 120. In this case, 150) can be configured as one body.

In addition, two winding projections 115 may be provided on the upper outer circumferential surface of the bobbin 110. Both ends of the first coil 120 may be wound on the winding protrusions 115 and may be connected to a pair of solder portions provided on the upper elastic member 150 by soldering or the like . Further, the pair of winding projections 115 may be disposed at symmetrical positions with respect to the center of the bobbin 110. The solder joints of the first coil 120 wound on the solder part and the winding projections 115 are formed by the inner frame 151 of the upper elastic member 150 being tightly coupled to the upper surface of the bobbin 110 It can also play a role to make it possible.

The first coil 120 may be a ring-shaped coil block inserted into and coupled to the outer circumferential surface of the bobbin 110, but the present invention is not limited thereto and the coil may be directly wound on the outer circumferential surface of the bobbin 110.

According to the present embodiment, the first coil 120 may be formed in a substantially octagonal shape as shown in FIG. The shape of the outer circumferential surface of the bobbin 110 may correspond to the shape of the bobbin 110, but the shape of the outer circumferential surface of the bobbin 110 is not limited thereto, and any structure may be used as long as the coil can be coupled to the bobbin. Do. In addition, at least four surfaces of the first coil 120 may be provided in a straight line, and corner portions connecting these surfaces may be round or straight. At this time, the portion formed in a straight line may be formed to be a surface corresponding to the magnet 130. The surface of the magnet 130 corresponding to the first coil 120 may have the same curvature as the curvature of the first coil 120. That is, if the first coil 120 is a straight line, the surface of the corresponding magnet 130 may be straight, and if the first coil 120 is a curved line, the surface of the corresponding magnet 130 may be curved. Further, even if the first coil 120 is a curved line, the surface of the corresponding magnet 130 may be straight or vice versa.

The first coil 120 moves the bobbin 110 in a direction parallel to the optical axis to perform an autofocus function. When the current is supplied, the first coil 120 can form an electromagnetic force through interaction with the magnet 130, An electromagnetic force can move the bobbin 110.

The first coil 120 may correspond to the magnet 130. The magnet 130 may be formed as a single body so that the entire surface of the first coil 120 facing the first coil 120 may have the same polarity The first coil 120 and the magnet 130 may have the same polarity as the corresponding surface. If the magnet 130 is divided into two parts by a plane perpendicular to the optical axis to divide the first coil 120 into two or more faces, the first coil 120 Or may be divided into the number corresponding to the divided magnets 130.

The magnet 130 may be installed at a position corresponding to the first coil 120. According to the present embodiment, the magnet 130 may be installed at a position corresponding to the first coil 120 of the housing 140 as shown in FIG.

The magnet 130 may be formed as one body. In this embodiment, the magnet 130 may be disposed such that the N-pole faces the first coil 120 and the S pole is located on the outer face. However, the present invention is not limited to this, and it is also possible to configure the other way around. Further, as described above, it may be configured by being divided into two planes perpendicular to the optical axis.

At least two or more magnets 130 may be installed, and according to the present embodiment, four magnets 130 may be installed. At this time, the magnet 130 may have a rectangular parallelepiped shape having a predetermined width, and each of the magnets 130 may be provided on the side surface of the housing 140. At this time, the magnets 130 facing each other may be installed parallel to each other. Also, the magnet 130 may be disposed to face the first coil 120. At this time, the facing surfaces of the magnet 130 and the first coil 120 may be arranged to be parallel to each other. However, the present invention is not limited thereto, and only one of the magnet 130 and the first coil 120 may be planar and the other may be curved. Or both surfaces of the first coil 120 and the magnet 130 may be curved and the curvatures of the first coil 120 and the magnet 130 facing each other may be the same.

When the magnet 130 is provided in a hexahedron shape as shown in the figure, a pair of the magnets 130 are arranged in parallel in the second direction, and the other pair is arranged in parallel in the third direction . According to such an arrangement, it is possible to control the movement of the housing 140 for camera shake correction, which will be described later.

The housing 140 may be formed in a substantially rectangular shape, and may be formed in an approximately octagonal shape as shown in FIG. 2 according to the present embodiment. At this time, the housing 140 may include a first surface 141 and a second surface 142. The first surface 141 may be a surface on which the magnet 130 is installed and the second surface 142 may be a surface on which a support member 220 to be described later is disposed.

The first surface 141 may be formed to be flat, and may be formed to have an area corresponding to the magnet 130 or larger than the area corresponding to the magnet 130 according to the present embodiment. At this time, the magnet 130 may be fixed to the magnet seating portion 141a formed on the inner surface of the first surface 141. [ The magnet seating part 141a may be formed as a groove corresponding to the size of the magnet 130, and at least four faces of the magnet seating part 141a may be opposed to each other. At this time, an opening is formed in the bottom surface of the magnet seating portion 141a, that is, a side facing the second coil 230 to be described later, so that the bottom surface of the magnet 130 is directly opposed to the second coil 230 . Meanwhile, the magnet 130 may be fixed to the magnet seating portion 141a with an adhesive, but not limited thereto, and an adhesive member such as a double-sided tape may be used. Alternatively, instead of forming the magnet seating portion 141a as a concave groove, a window-shaped mounting hole may be formed in which a part of the magnet can be exposed or fitted. The upper surface of the first surface 141 may be provided with an adhesive injection hole for injecting an adhesive such as epoxy for fixing the magnet 130. According to the present embodiment, the adhesive injection hole may be provided in a tapered cylindrical shape so as to inject the adhesive through the exposed upper surface of the housing 140. The first surface 141 may be disposed parallel to the side surface of the cover member 300, which will be described later. Also, the first surface 141 may be formed to have a larger surface than the second surface 142.

A plurality of upper frame support protrusions 144 to which the outer frame 152 of the upper elastic member 150 is coupled may be formed on the upper side of the housing 140. At this time, the upper frame support protrusions 144 may be formed in a larger number than the number of the upper support protrusions 113. This is because the length of the outer frame 152 is longer than that of the inner frame 151. Meanwhile, a corresponding third through hole may be formed in the outer frame 152 corresponding to the upper frame support protrusion 144, and may be fixed thereto by adhesive or heat fusion.

A plurality of lower frame support protrusions 145 to which the outer frame 162 of the lower elastic member 160 is coupled may be protruded from the lower side of the housing 140. At this time, the lower frame support protrusions 145 may be formed in a larger number than the number of the lower support protrusions. This is because the length of the outer frame 162 of the lower elastic member 160 is longer than the length of the inner frame 161.

On the other hand, the upward and / or downward movement in the direction parallel to the optical axis of the bobbin 110 can be elastically supported by the upper and lower elastic members 150 and 160. The upper elastic member 150 and the lower elastic member 160 may be formed as leaf springs.

The upper and lower elastic members 150 and 160 include inner frames 151 and 161 coupled to the bobbin 110 and outer frames 152 and 162 and inner frame 151 161 and the outer frame 152 (162). The connection portions 153 and 163 may be bent at least once to form a pattern of a predetermined shape. The bobbin 110 can be elastically supported in the upward and / or downward movement in the first direction parallel to the optical axis by the change of the position of the connection portions 153 and 163 and the fine deformation.

2, the support member 220 is integrally formed at an edge portion of the upper elastic member 150, and is bent (bent) in a direction parallel to the optical axis before or after the assembly bending. However, the present invention is not limited thereto, and the support member 220 may be formed separately from the upper elastic member 150 and coupled thereto. When the support member 220 is formed as a separate member, it may be formed of a leaf spring, a coil spring, a suspension wire, or the like, and any member capable of elastically supporting it may be used.

Meanwhile, the upper and lower elastic members 150 and 160, the bobbin 110, and the housing 140 may be assembled through heat bonding and / or bonding using an adhesive or the like. At this time, it is possible to finish the fixing work by bonding using the adhesive after fixing by thermal fusion according to the assembling order.

The second lens driving unit 200 includes a first lens driving unit 100, a base 210, a supporting member 220, a second coil 230, a circuit board 250, And may further include a second sensing sensor 240. The second sensing sensor 240 may include two members for sensing two directions in the x / y direction, Can be disposed on the circuit board.

5, the second sensing sensor 240 may be disposed near the center of the second coil 230. At least two of the sensing sensors 240 may be disposed on a plane orthogonal to the second sensing coil 240. As described above, X / Y Two directions can be detected. At this time, the second sensing sensor 240 may be disposed on the mounting surface of the second coil 230 of the circuit board 250, or may be disposed on the opposite surface of the second coil 230. At this time, the installation position of the second sensing sensor 240 may not be interfered with the second coil 230.

The first lens driving unit 100 may be configured as described above, and may be replaced with an optical system that implements another type of auto focusing function in addition to the above configuration. That is, instead of using an auto focusing actuator of the voice coil motor type, it is also possible to use an optical module using a single lens moving actuator or an actuator of a variable index type. That is, the first lens driving unit 100 can be any optical actuator capable of performing the auto focusing function. However, it is necessary that a magnet 130 is installed at a position corresponding to the second coil 230.

The base 210 may have a substantially rectangular shape, and the support member 220 may be fixed at four corners. When the cover member 300 is adhered and fixed to the base 210, a plurality of first groove portions 211 for injecting an adhesive may be provided. At least one or more of the first trenches 211 may be formed on the surface side of the circuit board 250 which is not opposite to the terminal surface of the circuit board 250 described below.

A terminal surface support groove having a size corresponding to the terminal surface may be formed on a surface of the base 210 facing the terminal surface. The terminal surface support groove is recessed inwardly from the outer circumferential surface of the base 210 to adjust the amount of protrusion of the terminal surface.

Further, a step is formed on the circumferential surface of the base 210 to guide the cover member 300 coupled to the upper side of the step, and the end portion of the cover member can also be coupled so as to be in surface contact. At this time, the step and the end of the cover member 300 may be adhesively fixed and sealed by an adhesive or the like.

In addition, the upper surface of the base 210 may have a concave support member receiving groove into which corner the support member 220 can be inserted. An adhesive may be applied to the support member seating groove to fix the support member 220 so as not to move.

The support member 220 may be bent at the assembly step and coupled to the base 210 in a state where the support member 220 is integrally formed at four corners of the upper elastic member 150 as shown in FIG. The end of the support member 220 may be inserted into the support member seating groove and fixed with an adhesive such as epoxy

Since the supporting member 220 according to the present embodiment is formed at the corner of the upper elastic member 150, a total of four can be provided. However, the present invention is not limited to this, and it is also possible that the number of each two corners is eight.

3, the supporting member 220 of the embodiment may include a connecting portion 221 connected to the upper elastic member 150, the elastic deforming portions 222 and 223, and the fixing portion 224, At least two of the four support members 220 may include a terminal portion 226.

The connection portion 221 is connected to the corner surface of the upper elastic member 150 and the through hole 221a is formed at the center so that the bending operation can be performed on the right and left sides of the through hole 221a, The supporting member 220 can be formed by bending. The shape of the connecting portion 221 is not limited to this, and any shape can be used so long as the connecting portion 221 can be bent without forming a through hole. When the support member 220 is formed separately from the upper elastic member 150, the connection portion 221 may be a portion where the support member 220 and the upper elastic member 150 are electrically connected.

The elastic deforming portions 222 and 223 are provided in a bent shape at least once to form a certain pattern. According to the present embodiment, the elastic deformation portion may include the first and second elastic deformation portions 222 and 223, and may be provided in mutually corresponding shapes. When the first elastic deformation portion 222 is provided in an N-shape in which a linear portion is formed in a direction parallel to the optical axis through two folds, the second elastic deformation portion 223 may also be formed correspondingly. The above-mentioned N-shape is merely an example, and it is also possible to have various patterns such as a zigzag shape. At this time, the first and second elastically deformable parts 222 and 223 may be composed of only one, or may be formed in the form of a suspension wire without such a pattern. The base 210 and the support member 220 may be coupled with each other and a groove that can be coupled with the support member 220 may not be formed on the base 210.

The elastic deformation portions 222 and 223 may be elastically deformed finely in a direction in which the housing 140 moves when the housing 140 moves in the second and third directions which are planes perpendicular to the optical axis. Accordingly, the housing 140 can be moved in the second and third directions, which are planes perpendicular to the optical axis, with almost no change in position in the first direction parallel to the optical axis, thereby enhancing the accuracy of the camera shake correction. This utilizes the characteristic that the elastic deformation portions 222 and 223 can extend in the longitudinal direction.

The fixing portion 224 may be provided at an end portion of the support member 220 and may be provided in a plate shape wider than the width of the elastic deforming portions 222 and 223 but is not limited thereto and may have a narrow or corresponding width It is possible. The fixing portion 224 may be inserted into the supporting member receiving groove of the base 210 and may be fixedly coupled with an adhesive member such as an epoxy or the like. However, the present invention is not limited thereto, and the support member receiving grooves may be made to correspond to the fixing portion 224 so as to be fittable.

The terminal portion 226 may be formed by bending a plate-like member extending from the fixing portion 224 at least once. The terminal portions 226 may be connected to the pads 256 provided on the circuit board 250 in such a manner that they can be energized by soldering or the like. To this end, the terminal portion 226 and the pad 256 may be disposed so that their faces and faces face each other. At this time, the terminal portion 226 and the pad 256 may be in surface contact with each other, or may be spaced apart from each other by a certain distance as shown in the figure, and a conductive member such as solder may be interposed therebetween. The connection between the terminal portion 226 and the pad 256 allows the support member 220 to supply a power having a different polarity to the upper elastic member 150 and improve the fixing force of the support member 220 on the base 210 . The terminal unit 226 may be integrally formed with the upper elastic member 150 or may be electrically connected to the upper elastic member 150 even if the terminal unit 226 is separately formed. The terminal portion 226 may be electrically connected to the circuit board 250 at one end or near one end thereof, whether integrally formed with the upper elastic member 150 or separately formed. In addition, the terminal portion 226 may be extended or bent as shown in Fig.

The second coil 230 may be disposed on the circuit board 220 fixed to the cover member 300 so as to face the magnet 130. For example, the second coil 230 may be disposed outside the magnet 130.

According to the present embodiment, a total of four second coils 230 may be provided on each of four sides, but not limited thereto, and only two such second coils 230 are installed, such as one for the second direction and one for the third direction Or four or more may be installed. The second coil 230 may be formed by winding a wire in a donut shape, and a line of sight and a ship may be connected to terminals formed on the circuit board 250 so as to be energized.

The second coil 230 may be installed on the inner surface of the circuit board 250 installed inside the cover member 300. However, the second coil 230 may be directly mounted on the inner circumferential surface of the cover member 300, or may be formed on a separate substrate, and the substrate may be stacked on the circuit board 250.

The first sensing sensor 260 sensing movement in the Z-axis direction may be disposed at a position facing the sensing magnet 400 of the circuit board 250. For example, when the sensing magnet 400 is installed on the upper surface of the bobbin 110, the first sensing sensor 260 may sense the sensing magnet 260 on the inner surface of the frame 250a of the circuit board 250, (400). ≪ / RTI >

As shown in FIG. 2, at least one sensing magnet 400 for detecting movement in the Z-axis direction may be provided near the edge of the upper surface of the bobbin 110, The first lens driving device 100 can sense the first direction movement by sensing a change in the magnetic field according to a change in the position of the sensing magnet 400. [ The first sensing sensor 260 may be a hall sensor, and any sensor capable of sensing a magnetic force change may be used. In addition, the first sensing sensor 260 may correspond to the mounting position and the number of the sensing magnet 400.

5, the circuit board 250 is coupled to the inner surface of the cover member 300 and includes a frame portion 250a supported inside the upper end portion of the cover member 300 and the second coil 230 May be mounted on the substrate portion 250b. At this time, at least one of the substrate portions 250b may be formed as a terminal surface. In this embodiment, the circuit board can form two bent terminal surfaces. A plurality of terminals 251 are disposed on the terminal surface so that current can be supplied to the first and second coils 120 and 230 by receiving external power. The number of terminals formed on the terminal surface may be increased or decreased according to the type of components that need to be controlled. Meanwhile, according to the present embodiment, the circuit board may be provided by FPCB. However, the present invention is not limited thereto, and the terminal configuration of the circuit board 250 may be formed directly on the surface of the base 210 using a surface electrode method or the like. The circuit board 250 may be provided with a pad (not shown) connected to the terminal unit 226 provided on the support member 220 in a conductive manner.

According to this configuration, the second coil 230 can perform the camera shake correction by moving the housing 140 in the second and third directions through the interaction with the magnet 130.

The cover member 300 may be provided in a substantially box shape and may cover the first and second lens driving units 100 and 200. 1 and the like, a second groove 310 is formed at a position corresponding to the first groove 211 of the base 210 so that the coupling of the first and second grooves 211, A predetermined area of the groove can be formed. An adhesive member having a viscosity may be applied to the recessed portion. That is, the adhesive member applied to the recessed portion hits a gap between the facing surfaces of the cover member 300 and the base 210 through the recessed portion, so that the cover member 300 covers the base 210, And can be configured to be sealed.

A third groove 320 may be formed on a surface of the cover member 300 corresponding to the terminal surface of the circuit board 250 so as not to interfere with the plurality of terminals 251 formed on the terminal surface. The third groove part 320 is recessed on the entire surface facing the terminal surface so that the adhesive member is applied to the inside of the third groove part 320 to cover the cover member 300, the base 210, 250 can be sealed.

According to the above-described configuration, since the magnet 130 can be commonly used to implement the auto focusing operation and the camera shake correcting operation of the first and second lens driving units 100 and 200, the number of parts can be reduced, The weight of the body 140 can be reduced to improve the responsiveness. Of course, the magnet for auto focusing and the magnet for correction of shake can be configured separately.

Further, since the support member 220 can be formed by bending the upper side elastic member 150 in one body, the number of parts can be reduced and the assembling property can be improved.

In addition, since components such as the second coil 230 for correcting the shaking motion can be modularized on the inner surface of the cover member 300, the assembling process can be simplified.

The camera module includes a lens driving device including first and second lens driving devices 100 and 200 configured as described above, a lens barrel coupled to the bobbin 110, an image sensor, and a printed circuit board . At this time, the printed circuit board is mounted on the image sensor and can form the bottom surface of the camera module.

The bobbin 110 may include a lens barrel in which at least one lens is installed. The lens barrel may be formed to be screwable inside the bobbin 110. However, the present invention is not limited thereto, and although not shown, it is also possible that the lens barrel is directly fixed to the inside of the bobbin 110 by a method other than screwing, or the one or more lenses are integrally formed with the bobbin . The lens may be composed of a single sheet, or two or more lenses may be configured to form an optical system

The base 210 may further include an infrared cutoff filter at a position corresponding to the image sensor, and may be coupled to the cover member 300. Further, the lower side of the cover member 300 can be supported. A separate terminal member may be provided in the base 210 to supply power to the printed circuit board, or a terminal may be integrally formed using a surface electrode or the like. Meanwhile, the base 210 may function as a sensor holder for protecting the image sensor. In this case, a protrusion may be formed downward along the side surface of the base 210. However, this is not essential, and although not shown, a separate sensor holder may be disposed below the base 210 to perform its role.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Therefore, the true scope of protection of the present embodiment should be defined by the following claims.

100; A first lens driving device 110; Bobbin
120; A first coil 130; Magnet
140; Housing 150; The upper elastic member
160; A lower elastic member 200; The second lens driving device
210; A base 220; Supporting member
230; A second coil 240; The second sensing sensor
260; A first sensing sensor 250; Circuit board
300; A cover member 400; Sensing magnet

Claims (21)

The bobbin includes a bobbin having at least one lens disposed on the inner side and a first coil disposed on an outer circumferential surface of the bobbin and a housing for supporting a magnet disposed around the bobbin, And a first lens driving unit for moving the first coil in a first direction parallel to the optical axis; And
A support member movably supporting the first lens driving unit in the second and third directions with respect to the base and capable of supplying power to the first coil; A sensing magnet mounted on the first lens driving unit, and a position sensing unit for sensing a change in a magnetic field of the sensing magnet to detect a position of the housing with respect to the base in a first direction, the second coil being disposed to face the magnet of the first lens driving unit, A second lens driving unit having a circuit board including a first sensing sensor for sensing a position of the housing and moving the housing in a second and third directions perpendicular to the optical axis by mutual interaction of the magnet and the second coil; And
And a cover member coupled to the base and surrounding the first and second lens driving units,
And the second coil is disposed on the side wall of the cover member.
The method according to claim 1,
And a second detection sensor for detecting a position in the second and third directions.
2. The zoom lens according to claim 1, wherein the first lens driving unit comprises:
An octagonal bobbin having at least four straight surfaces and a corner surface connecting them;
A first coil wound on an outer circumferential surface of the bobbin;
A magnet disposed at a position corresponding to a straight surface of the first coil;
A housing to which the magnet is fixed; And
Wherein the inner frame is coupled to the bobbin, and the outer frame is coupled to the housing.
2. The apparatus of claim 1, wherein the second coil
And a plurality of circuit boards coupled to inner side walls of the cover member.
5. The connector according to claim 4,
A first surface on which the four magnets are installed; And
And a second surface on which the first surfaces are interconnected and on which the support member is disposed.
The image forming apparatus according to claim 1,
Wherein the upper elastic member is integrally formed with the upper elastic member.
3. The apparatus according to claim 2,
A connecting portion connected to the upper elastic member;
First and second resilient deformations extending from the connection portion; And
And a fixing unit fixedly coupled to the base.
8. The apparatus according to claim 7,
At least four lenses are provided to support the second lens driving unit,
And at least two of them further include terminal portions to which different polarities are applied.
8. The apparatus according to claim 7,
A connecting portion connected to the upper elastic member;
First and second resilient deformations extending from the connection portion; And
And a fixing unit fixedly coupled to the base.
10. The connector according to claim 9, wherein the first and second elastic deforming parts
Wherein the lens driving device is provided in a shape bent at least once more to form a certain pattern.
10. The connector according to claim 9, wherein the first and second elastic deforming parts
Wherein the lens barrel is in any one of an N-shape and a zigzag shape in which a linear portion is formed in a direction parallel to the optical axis through at least four folds.
10. The connector according to claim 9, wherein the first and second elastic deforming parts
A lens driving device in the form of a wire without a pattern.
2. The apparatus of claim 1, wherein the second coil
And is provided on the inner surface of the circuit board provided on the inner surface of the cover member.
2. The apparatus of claim 1, wherein the second coil
And a pattern coil provided on an upper surface of the circuit board provided on the inner surface of the cover member and being laminated on the circuit board.
2. The apparatus of claim 1, wherein the second coil
And the cover member is integrally formed on the inner surface of the cover member in the form of a surface electrode.
3. The apparatus according to claim 2,
And a hole sensor and a photo reflector that are aligned with the center of the second coil and are inserted into the detection sensor mounting groove formed on the base.
3. The apparatus according to claim 2,
And a virtual line connecting the center of the base and the center of each of the detection sensors are arranged vertically to each other.
The magnetron according to claim 1,
An auto focus magnet for moving the bobbin in the first direction, and a magnet for correcting the shaking motion of the housing in the second and third directions.
[3] The apparatus of claim 1, wherein the sensing magnet comprises:
And the second lens driving device is disposed on the upper surface of the first lens driving device.
20. The apparatus of claim 19, wherein the sensing magnet comprises:
And at least one corner portion of the upper surface of the bobbin is disposed.
Image sensor;
A printed circuit board on which the image sensor is mounted; And
A camera module comprising the lens driving device according to any one of claims 1 to 20.

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