KR20160015885A - Lens moving apparatus - Google Patents

Abstract

An embodiment of a lens driving apparatus may comprise: a cover member; a bobbin provided on the cover member, provided to be movable in a first direction by an electromagnetic interaction; a winding ring coupled to the bobbin; a current carrying member provided on a lower part of the bobbin; and a position detecting sensor and a magnet for sensing which are respectively coupled to any one of the cover member and the bobbin.

Description

[0001] LENS MOVING APPARATUS [0002]

Embodiments relate to a lens driving apparatus capable of performing a precise autofocusing function.

The contents described in this section merely provide background information on the embodiment and do not constitute the prior art.

In recent years, IT products such as mobile phones, smart phones, tablet PCs, and notebooks, which incorporate ultra-compact digital cameras, are actively under development.

2. Description of the Related Art In general, an IT product incorporating an ultra-small digital camera includes an image sensor for converting external light into a digital image or a digital image, and a lens driving unit for adjusting the distance between the lenses and aligning the focal distance of the lens.

In general, a micro-digital camera performs a control process of finding a point at which a clearest image is generated on the basis of the sharpness of a digital image formed on an image sensor according to the distance between the lens and the image sensor in order to perform auto focusing Consists of. When the auto focusing is performed, the bobbin on which the lens is mounted moves in the direction of the optical axis by the magnet, and the elastic member provided on the upper side and / or the lower side of the bobbin elastically supports the movement of the bobbin. In this case, a lens driving apparatus for driving a lens of a general digital camera includes an open loop control method for determining the initial position by the preliminary pressure of the elastic member supporting the bobbin as a movable part and controlling the movement amount of the bobbin according to the amount of current Lt; / RTI >

 However, since the position control of the bobbin is not precisely performed in the lens driving apparatus of the open-loop control system, it is difficult to grasp the optimal focusing position of the lens installed in the bobbin There is a problem.

In addition, in the open loop control method, full scanning for the subject is necessarily required for autofocusing, so that the autofocusing takes a long time.

Therefore, it is an object of the embodiment to provide a lens driving apparatus capable of performing a precise autofocusing function.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

One embodiment of the lens driving device includes a cover member; A bobbin provided in the cover member and movable in a first direction by an electromagnetic interaction; A winding ring coupled to the bobbin; An energizing member provided at a lower portion of the bobbin; And a position sensing sensor and a sensing magnet respectively coupled to either the cover member or the bobbin.

An inner yoke formed integrally with the cover member on the inner side of the cover member; And a second circuit board electrically connected to the energizing member.

The inner yoke may form a first concavo-convex portion, and the bobbin may have a second concavo-convex portion to be engaged with the first concavo-convex portion.

The energizing member may be formed of a flexible circuit board or an elastic member.

The energizing member may have one side coupled to the lower portion of the bobbin and the other side coupled to the second circuit board.

And a displacement detector for determining a displacement value of the bobbin moved in the first direction.

The displacement sensing unit may include: a second magnet coupled to the bobbin and serving as the sensing magnet; And the position sensor coupled to the second circuit board and having a predetermined distance from the second magnet at a position corresponding to the second magnet.

The bobbin may be provided with a third magnet coupled to the bobbin at a position symmetrical to the second magnet and offsetting a bias of magnetic force and / or weight by the second magnet.

The displacement sensing unit may include: the second magnet coupled to the second circuit board; And the position sensor coupled to the bobbin and having a predetermined distance from the second magnet at a position corresponding to the second magnet.

And a coil for applying a current for moving the bobbin in the first direction may be wound on an outer circumferential surface of the winding ring.

The first concavo-convex portion of the cover member may be formed in a rectangular shape, and a third concavo-convex portion may be formed at an end portion of the protruding portion of the first concavo-convex portion.

The third concave-convex part may be provided in at least one of a rectangular shape, a trapezoid shape, a triangular shape, and a wavy shape.

The second concavo-convex part of the bobbin may be formed in a rectangular shape, and a fourth concavo-convex part may be formed at an end of the protruding part of the second concavo-convex part.

The fourth concave-convex portion may be provided in at least one of a rectangular shape, a trapezoid shape, a triangular shape, and a wavy shape.

The cover member may be provided with a first magnet for moving the bobbin.

Wherein the bobbin is provided with at least one lens therein, the winding ring is coupled to an outer circumferential surface of the bobbin, a coil is wound on an outer circumferential surface of the winding ring, and the coil is electromagnetically interacted with the first magnet, In the first direction.

The inner yoke may have a circular or polygonal cross-section as viewed in the first direction, and the winding ring and the coil may have a circular or polygonal cross-section corresponding to the shape of the inner yoke.

The base may further include a base coupled to a lower end of the cover member, and the base may include a base leg protruding in a first direction to support the first magnet.

The base lak may be provided in the same number as the first magnet at a position corresponding to the first magnet.

The first magnet may be provided in a pair, and each of the first magnets may be provided inside the edge of the cover member facing each other.

Another embodiment of the lens driving device includes a cover member; An inner yoke formed inside the cover member in a concavo-convex shape integrally with the cover member; A bobbin provided inside the cover member and movable in the first direction by an electromagnetic interaction to form a concavo-convex portion capable of engaging with the concavo-convex shape of the inner yoke; A position detection sensor provided inside the cover member and sensing a first movement position of the bobbin; And a first magnet provided within the cover member to move the bobbin.

The cover member is formed in a rectangular shape in side view in the first direction, and the position detecting sensor is provided at an edge of the cover member, and the first magnet has a corner where the position detecting sensor is provided, At least one of which is provided inside the cover member at an edge other than the opposite corner.

And a second magnet coupled to the bobbin and having a predetermined distance from the position sensor at a position corresponding to the position sensor.

The winding ring may be coupled to an outer circumferential surface of the bobbin, and the first magnet may be provided at least one distance apart from the second magnet by a predetermined distance in the circumferential direction of the winding ring.

Another embodiment of the lens driving device includes: a cover member; An inner yoke formed inside the cover member in a concavo-convex shape integrally with the cover member; A bobbin provided inside the cover member and movable in the first direction by an electromagnetic interaction, the bobbin being provided with a concave / convex portion engageable with the concavo-convex shape of the inner yoke; A winding ring coupled to an outer circumferential surface of the bobbin; And a coil coupled to an outer circumferential surface of the winding ring.

The winding ring may be provided with a rotation preventing portion for preventing rotation of the winding ring at an upper end thereof.

The rotation preventing portion may be formed such that at least one end of the rotation ring is bent at the upper end of the winding ring, and the end portion is linearly formed so as to correspond to the inner side surface of the cover member at least partially formed in a plane.

The winding ring may include a locking protrusion protruding from the lower end toward the center of the winding ring to increase a coupling force between the bobbin and the winding ring.

The latching jaws may be plurally provided and may be symmetrical with respect to the center of the winding ring.

The lens driving apparatus of the above-described embodiment can achieve precise autofocusing by using the feedback control method, and has the effect of shortening the autofocusing time.

In addition, when the flexible circuit board is used as the energizing member, it is possible to prevent the defective product due to the deformation of the elastic member and the deterioration of the picture quality of the photographed picture.

The third concavo-convex part and / or the third concavo-convex part reduce an area where the first concavo-convex part of the cover member and the second concavo-convex part of the bobbin come in contact with each other to reduce noise caused by contact between the bobbin and the cover member .

In addition, since the first concavo-convex portion and the second concavo-convex portion are engaged with each other, when the cover member including the bobbin and the yoke is coupled, there is an effect that the bobbin and the cover member can be prevented from rotating relative to each other.

Further, when the elastic member is used as the energizing member, the elastic member is more economical in consideration of the cost of the flexible circuit board and the one elastic member, which is advantageous in terms of cost saving.

1A is an exploded perspective view showing a lens driving apparatus according to an embodiment.
1B is an exploded perspective view showing a lens driving apparatus according to another embodiment.
Fig. 2 is a partial cross-sectional view of a portion of the lens driving apparatus illustrated in Figs. 1A and 1B.
Figures 3A-3D show cross-sectional views of embodiments of the bobbin illustrated in Figures 1 and 2, respectively.
Figures 4A-4D show perspective views of embodiments of the winding ring illustrated in Figure 2;
Figures 5A-5E show a perspective view of a modified embodiment of the winding ring illustrated in Figure 4D.
Figs. 6A to 6D show a state in which the winding ring illustrated in Figs. 4A to 4D is combined with the coil.
7 shows a perspective view in which a winding ring and a coil are combined.
FIG. 8 is a cross-sectional view showing a combination of a bobbin and a winding ring according to another embodiment.
9A and 9B show cross-sectional views of the lens driving apparatus of the conventional and the embodiments, respectively.
10A is a view showing an interior of a lens driving apparatus according to an embodiment.
10B is a cross-sectional view of the lens driving apparatus according to an embodiment.
Fig. 10C is an enlarged view showing a part of Fig. 10B. Fig.
11A is a bottom view showing a specific portion of a lens driving apparatus according to an embodiment.
11B is a plan view showing a specific portion of the lens driving apparatus according to the embodiment.
12A and 12B are a plan and a bottom perspective view showing a cover member according to an embodiment.
Figure 13 is a perspective view of a bobbin according to one embodiment.
14 is a perspective view of a winding ring according to one embodiment.
15 is a perspective view showing a state in which a bobbin, a winding ring, and a coil are coupled according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments are to be considered in all aspects as illustrative and not restrictive, and the invention is not limited thereto. It is to be understood, however, that the embodiments are not intended to be limited to the particular forms disclosed, but are to include all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience.

The terms "first "," second ", and the like can be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the constitution and operation of the embodiment are only intended to illustrate the embodiments and do not limit the scope of the embodiments.

In the description of the embodiments, when it is described as being formed on the "upper" or "on or under" of each element, the upper or lower (on or under Quot; includes both that the two elements are in direct contact with each other or that one or more other elements are indirectly formed between the two elements. Also, when expressed as "on" or "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

It is also to be understood that the terms "top / top / top" and "bottom / bottom / bottom", as used below, do not necessarily imply nor imply any physical or logical relationship or order between such entities or elements, But may be used only to distinguish one entity or element from another entity or element.

Further, in the drawings, 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 .

1A is an exploded perspective view showing a lens driving apparatus according to an embodiment. 1B is an exploded perspective view showing a lens driving apparatus according to another embodiment. Fig. 2 is a partial cross-sectional view of a portion of the lens driving apparatus illustrated in Figs. 1A and 1B.

The lens driving apparatus illustrated in Figs. 1A, 1B, and 2 may include a mover 100, a cover member 200, a first magnet 500, and a base 700. [ The cover member 200 may be coupled to the base 700 and the underside of the cover member 200 may be supported by the base 700. [ Also, the cover member 200 may be formed in a hollow shape, and an inner yoke 210 for shielding a magnetic field may be integrally formed. The specific structure of the inner yoke 210 will be described later.

The cover member 200 may be formed of a ferromagnetic material such as iron. In addition, the cover member 200 may have an outer shape when viewed from above, and may have a circular inner shape so as to cover the bobbin 150, but the embodiments are not limited thereto. At this time, the cover member 200 may be formed in an octagonal shape as shown in Figs. 1A and 1B, or may be provided in a quadrangular shape, as shown in Fig. If the first magnet 500 disposed at the corner of the cover member 200 has a trapezoidal shape when viewed from above, the magnetic field leaking from the corner of the cover member 200 to the outside can be minimized.

The first magnet 500 is provided in the cover member 200 and serves to drive the mover 100. When the first magnet 500 is directly fixed to the cover member 200, the first magnet 500 may be fixed to the cover member 200. In this case, when the first magnet 500 is directly fixed to the cover member 200, 200). ≪ / RTI >

When the cover member 200 is made of metal, it is effective to shield the magnetic field if the surface of the cover member 200 that is in contact with the first magnet 500 is large. In addition, at least two faces of the first magnet 500 can contact the cover member 200. For example, when the first magnet 500 has a trapezoidal shape when viewed in a plan view in the first direction, the first magnet 500 may contact the inner surface of the cover member 200 at least three sides or more . In addition, in the embodiment, the first magnet 500 is disposed at two corners of the cover member 200. And may be disposed on four inner sides of the cover member 200. [

Meanwhile, the mover 100 may include a bobbin 150, a winding ring 180, and a coil 190.

The bobbin 150 can be installed in the inner space of the cover member 200 in a reciprocating manner in the first direction. The bobbin 150 may be coupled with the winding ring 180 on the outer circumferential surface of the bobbin 150 so as to be capable of electromagnetic interaction with the first magnet 500 and may further include a coil 190 ) May be wound or coupled.

The bobbin 150 may be coupled with a lens barrel (not shown) in which at least one lens is installed, and the lens barrel may be formed to be screwable inside the bobbin 150. Although not shown, it is also possible that the lens barrel is directly fixed to the inside of the bobbin 150 by a method other than screwing, or one or more lenses may be integrally formed with the bobbin 150 without a lens barrel . The lens may be composed of a single sheet, or two or more lenses may be configured to form an optical system.

Meanwhile, as shown in FIG. 2, the first magnet 500 and the winding ring 180 may be spaced apart by a certain distance g. 2, it is possible to prevent the upper elastic member 410 from contacting and interfering with the first magnet 500 even when the bobbin 150 moves upward and downward in the first direction So that the bobbin 150 can smoothly move. Such a separation distance g may be formed in the horizontal direction, the circular direction or the vertical direction as shown, or may be formed in a direction satisfying the combination thereof. That is, even when the bobbin 150 moves, the winding ring 180 always needs to be separated from the first magnet 500 by a predetermined distance or more.

The winding ring 180 may be coupled to the bobbin 150 and the coil 190 may be wound on the outer circumferential surface 184 of the winding ring 180 to have a ring shape.

Hereinafter, embodiments of the bobbin 150, the winding ring 180, and the coil 190 in the above-described moving part 100 will be described in detail with reference to the accompanying drawings. The bobbin 150 and the winding ring 180 may be integrally formed by insert injection or the like and the bobbin 150 may be integrally formed with the winding ring 180. [ 180 may be removably attached to the bobbin 150.

The bobbin 150 may include a first body portion B1 and a support portion B1S.

The first body part B1 may serve to house at least one lens on the inner side. The first body part B1 may be formed into a hollow cylindrical shape. The bobbin 150 having a cylindrical shape may include a top end 152 and a bottom end 154 opposite the top end 152.

A female screw portion is formed on the inner circumferential surface of the bobbin 150 to accommodate the lens therein, and the lens barrel can be fastened to the female screw portion.

The support portion B1S of the bobbin 150 may protrude outward from the outer circumferential surface 156 of the first body portion B1.

The support portion BIS may be integral with the first body portion B1 as illustrated in Figs. 1A, 1B and 2, but the embodiments are not limited thereto. That is, according to another embodiment, the support part BIS and the first body part B1 may be formed separately from each other, and the support part BIS may be attached to the first body part B1.

Further, although the support portion BIS is shown protruding from the lower end of the first body portion B1, the embodiment is not limited to this. That is, according to another embodiment, not only the lower end of the first body part B1 but also the upper end of the first body part B1 may protrude from the upper end or the upper end as long as the support part BIS can support the winding ring 180 described later.

Figs. 3A-3D illustrate cross-sectional views of embodiments 150A, 150B, 150C, and 150D of the bobbin 150 illustrated in Figs. 1A, 1B, and 2, respectively.

As illustrated in Figs. 3A to 3D, the support portion B1S may include a first groove (or recess) H1. Here, the first groove H1 may extend in the first direction of the lens. In this case, as illustrated in FIG. 2, the winding ring 180 may have a shape that can be accommodated in the first groove H1.

Further, as illustrated in Figs. 3B and 3D, the support portion B1S may further include a second groove H2. The second groove H2 may communicate with the first groove H1 and extend in a second direction different from the first direction (e.g., the Y-axis direction). In this case, as illustrated in FIG. 2, the winding ring 180 extends from the first groove H1 to the second groove H2 and has a shape that is receivable, so that the coil ring 180 is firmly supported by the support portion B1S .

Also, as illustrated in FIGS. 3A to 3D, the first groove H1 may be disposed apart from the outer circumferential surface 156 of the first body portion B1.

Further, as illustrated in Figs. 3C and 3D, the support portion B1S may further include a third groove H3. The third groove H3 may extend in the first direction between the first groove H1 and the outer peripheral surface 156 of the first body portion B1.

The embodiment is not limited to the depths of the first to third grooves H1 to H3 described above. For example, the first groove H1 may have a depth suitable to receive and support the winding ring 180.

In addition, although the winding ring 180 according to the above-described embodiment may include a material having magnetism, the embodiment is not limited to the kind of the material of the winding ring 180. That is, according to another embodiment, the winding ring 180 may be made of a non-magnetic material.

Again, referring to FIGS. 1A, 1B, and 2, the winding ring 180 having a shape that can be supported by the bobbin 150 may include a second body portion. The second body portion may include at least one second body B2, a guide portion B2S1, and a hooking portion B2S2.

Here, the coil 190 may be wound on the outer peripheral surface 184 of at least one second body B2. The coil 190 may be disposed at a position corresponding to the first magnet 500. Although the coil 190 is shown as having a circular planar shape in the embodiment, the coil 190 may have an angular shape other than circular, according to another embodiment, and may have an octagonal shape. That is, since the coil 190 is wound on the winding ring 180, the plane shape of the winding ring 180 and the plane shape of the coil 190 can be the same.

For example, the coil 190 may be a circular-shaped wire / square-shaped wire-wound coil, and the material may be a copper wire or aluminum or a composite wire of copper and aluminum, but the embodiment is not limited thereto. Further, the outer surface of the coil may be formed of an insulating material.

The coil 190 and the first magnet 500 may have the same curvatures on opposite surfaces, but the embodiments are not limited thereto. This is in consideration of the electromagnetic action with the first magnet 500 arranged opposite to the first magnet 500. Since the electromagnetic force can be maximized when the corresponding surface of the first magnet 500 is flat and the surface of the coil 190 facing the first magnet 500 is flat to be.

However, the present invention is not limited thereto. Depending on design specifications, the surfaces of the first magnet 500 and the coil 190 may be curved surfaces, all planar, or one curved surface and one planar surface.

The second body B2 of the second body part can be supported by the support part B1S of the bobbin 150. [ The inner circumferential surface 182 of the second body B2 may be opposed to the outer circumferential surface 156 of the bobbin 150. [

According to the embodiment, the winding ring 180 may have the same planar shape as the bobbin 150. As illustrated in FIGS. 1A and 1B, each of the winding ring 180 and the bobbin 150 is shown as having an annular planar shape, but the embodiment is not limited thereto.

That is, each of the bobbin 150 and the winding ring 180 may have various planar shapes, for example, a polygonal planar shape. Alternatively, the planar shape of the bobbin 150 and the planar shape of the winding ring 180 may be different from each other. The shape of the winding ring 180 in which the coil 190 is wound can be changed so that the surface of the coil 190 facing the first magnet 500 has a desired curvature.

The second body B2 of the winding ring 180 may be spaced apart from the first body B1 of the bobbin 150 in the second direction. Here, the second direction may be a Y-axis direction different from the first direction.

Hereinafter, various embodiments of the above-described winding ring 180 will be described with reference to FIGS. 4A to 4D and 5A to 5E.

Figs. 4A-4D are perspective views of embodiments of winding ring 180 (180A, 180B, 180C, 180D) illustrated in Fig.

As illustrated in Figs. 4B and 4D, the winding rings 180B and 180D may include a guide portion B2S1. The guide portion B2S1 may define a winding area CA which protrudes outward from the upper end of the second body B2 of the winding rings 180B and 180D and in which the coil 190 is wound. That is, as illustrated in FIG. 2, the coil 190 can be wound up to just under the guide portion B2S1.

In some cases, as illustrated in Figs. 4A and 4C, the guide portion B2S1 in the winding rings 180A and 180C may be omitted.

Further, as illustrated in Figs. 4C and 4D, the winding rings 180C and 180D may further include a latching jaw B2S2. The engaging jaw B2S2 protrudes inward from the lower end of the inner circumferential surface 182 of the second body B2 and protrudes inward from the second groove B2S2 of the support portion B1S of the bobbin 150B and 150D illustrated in Fig. H2. ≪ / RTI > In some cases, the engagement jaws B2S2 may be omitted in the winding rings 180A, 180B, as illustrated in Figs. 4A and 4B.

The coupling force between the bobbins 150B and 150D and the winding rings 180C and 180D is increased so that the bobbins 150B and 150D and the windings 180C and 180D, The rings 180C and 180D can be prevented from being separated. Here, although the engagement step B2S2 is shown as having a saw tooth shape, the embodiment is not limited to the shape of the engagement step B2S2.

Figures 5A-5E show a perspective view of a modified embodiment 180D-1, 180D-2, 180D-3, 180D-4, 180D-5 of the winding ring 180D illustrated in Figure 4D.

The winding ring 180D illustrated in Fig. 4D has the guide portion B2S1 and the engagement jaw B2S2. This winding ring 180D can be deformed into various shapes as illustrated in Figs. 5A to 5E.

4D, the inner circumferential surface 182 of the second body B2 may have a shape that opposes the entire outer circumferential surface 156 of the bobbin 150. In the case of the winding ring 180D illustrated in FIG.

5A to 5E, the inner circumferential surface 182 of the second body B2 may have a shape that opposes a part of the outer circumferential surface 156 of the bobbin 150 other than the entirety.

Also, as illustrated in Figs. 5A to 5C, a plurality of second bodies 182 may be provided. In this case, each of the plurality of second bodies 182 may have a columnar shape, but the embodiment is not limited thereto.

Referring to FIG. 5A, the plurality of second bodies B21-1, B22-1, B23-1 and B24-1 in the winding ring 180D-1 may be spaced apart from each other. At this time, the plurality of second bodies B21-1, B22-1, B23-1, and B24-1 may be spaced apart from each other at regular intervals or at different intervals.

The first distance D1 between the second bodies B21-1, B22-1, B23-1 and B24-1 is larger than the distance between the second bodies B21-1, B22-1, B23-1, B24-1, respectively, but the embodiment is not limited to this. That is, according to another embodiment, the first distance D1 may be equal to or less than the first width W1.

Similarly, referring to FIG. 5B, in the winding ring 180D-2, the plurality of second bodies B21-2, B22-2, B23-2, and B24-2 may be spaced apart from each other. At this time, the plurality of second bodies B21-2, B22-2, B23-2, and B24-2 may be spaced from each other at regular intervals or may be spaced apart from each other.

The second distance D2 between the second bodies B21-2, B22-2, B23-2 and B24-2 is larger than the distance between the second bodies B21-2, B22-2, B23-2, B24-2, respectively, but the embodiment is not limited to this. That is, according to another embodiment, the second distance D2 may be equal to or less than the second width W2.

5C, the plurality of second bodies B21-3, B22-3, B23-3, and B24-3 in the winding ring 180D-3 are spaced apart from each other . At this time, the plurality of second bodies B21-3, B22-3, B23-3, and B24-3 may be spaced from each other at regular intervals or may be spaced apart from each other.

However, unlike the example illustrated in FIGS. 5A and 5B, the third distance D3, in which the plurality of second bodies B21-3, B22-3, B23-3, and B24-3 illustrated in FIG. 5C are spaced apart, May be smaller than the third width (W3) of each of the second bodies (B21-3, B22-3, B23-3, B24-3), but the embodiment is not limited thereto. That is, according to another embodiment, the third distance D2 may be equal to or greater than the third width W3.

Also, as illustrated in FIG. 5A, the plurality of second bodies B21-1, B22-1, B23-1, and B24-1 may not be connected to each other. On the other hand, the lower ends of the plurality of second bodies B21-2, B22-2, B23-2, and B24-2 illustrated in FIG. 5B may be connected to each other by a first lower end connecting portion 186. [ In addition, the lower ends of the plurality of second bodies B21-3, B22-3, B23-3, and B24-3 illustrated in FIG. 5C may be connected to each other by a second lower end connection portion 188.

In addition, the above-described latching bosses B2S2 may be part of the first and second lower connection portions 186 and 188. [

5D and 5E, the upper portion of the second body B2 in the winding rings 180D-4 and 180D-5 may be formed in a concavo-convex shape.

On the other hand, the coil 190 may be wound on the outer peripheral surface 184 of the second body B2 of the winding ring 180.

Figs. 6A to 6D show a state in which the winding rings 180A to 180D illustrated in Figs. 4A to 4D are combined with the coil 190. Fig.

The winding rings 180A, 180B, 180C and 180D illustrated in Figs. 6A to 6D may correspond to the sectional views of the winding rings 180A, 180B, 180C and 180D illustrated in Figs. 4A to 4D, respectively. 6A to 6D, the coil 190 may be wound on the winding area CA. Here, as illustrated in Fig. 6B or 6D, the winding area CA can be defined by the guide part B2S1.

7 shows a perspective view in which the winding rings 180B and 180D and the coil 190 are combined. Referring to FIG. 7, it can be seen that the coil 190 can be wound on the outer circumferential surface 184 of the winding rings 180B and 180D illustrated in FIG. 6B or 6D.

The winding ring 180 and the coil 190 described above may be coupled to each other by an adhesive or may be coupled to each other by insert injection, Lt; / RTI >

Fig. 8 is a cross-sectional view showing a combination of the bobbin 150E and the winding ring 180E according to another embodiment.

As illustrated in FIG. 8, according to another embodiment, the outer peripheral surface 156 of the bobbin 150E may be coated with a winding ring 180E. In this case, the winding ring 180E coated on the outer peripheral surface 156 of the bobbin 150E may further include the guide portion B2S1. The guide portion B2S1 protrudes outward from the upper end of the second body B2 of the winding ring 180E to define a winding region in which the coil 190 is wound.

1A, 1B and 2, the first magnet 500 is disposed opposite to the coil 190 so as to interact with the coil 190 to move the bobbin 150 in the first direction. . That is, the bobbin 150 can be moved upward in the first direction by the force generated by the Fleming's left-hand rule by the magnetic field generated from each first magnet 500 and the current flowing through the coil 190.

At this time, the bobbin 150 can be elastically supported by the upper and lower elastic members 410 and 420 as described above. At this time, the moving distance of the bobbin 150 in the first direction can be precisely controlled by precisely controlling the amount of current applied to the coil 190. [

9A and 9B show cross-sectional views of the lens driving apparatus of the conventional and the embodiments, respectively. 9A, in the case of the conventional lens driving apparatus, the coil 90 is directly wound on the outer circumferential surface 56 of the bobbin 50, or the coil 90 is wound on the outer peripheral surface 56 of the bobbin 50 (Not shown). Thus, when the coil 90 is directly wound on the bobbin 50, after the winding of the coil 90, a change in the lens assembly torque may occur.

9B, in the case of the lens driving apparatus according to the embodiment, since the coil 190 is wound on the outer circumferential surface 184 of the winding ring 180, the heat or tension generated at the time of winding It is possible to prevent deformation of the bobbin 150 due to the rotation of the bobbin 150, thereby preventing changes in the lens assembly torque.

9A, since the coil 90 is directly wound on the outer circumferential surface 56 of the bobbin 50 in the conventional lens driving apparatus, the foreign matter 12 is supplied from the outside to the coil 90 and the first magnet (500).

9B, in the case of the lens driving apparatus according to the embodiment, the inner circumferential surface 182 of the winding ring 180 and the outer circumferential surface 156 of the bobbin 150 may be spaced apart by a constant distance d . A part 14 of the foreign matter 12 can be introduced into the space in which the constant distance d is formed and only the remainder 16 of the foreign matter 12 can flow into the coil 190 And the first magnet 500. In this case,

9A, the amount of the foreign matter 16 flowing into the void space between the coil 190 and the first magnet 500 can be significantly reduced. As a result, the magnetic field between the coil 190 and the first magnet 500 is less affected by the foreign matter 12, so that the rise and fall of the bobbin 150 can be controlled more accurately than before. For this, for example, the first distance d may be between 0.05 mm and 0.5 mm, but the embodiment is not limited to this.

The structure in which the coil 190 is wound on the winding ring 180 and the first magnet 500 is provided inside the cover member 200 facing the coil 190 is disclosed in the above- However, in another embodiment, an implementation of the opposite structure is also possible. That is, the winding ring may be provided in a polygonal shape, and a first magnet 500 is fixed or coupled to each surface of the polygon, and a coil (not shown) is disposed inside the cover member 200 at a position facing the first magnet 500 19 may be provided.

At this time, the winding ring serves to guide the first magnet 500 to move in the first direction by fixing or coupling, and since the coil 190 is not wound, it can be referred to as a guide ring.

10A is a view showing an interior of a lens driving apparatus according to an embodiment. 10B is a cross-sectional view of the lens driving apparatus according to an embodiment. Fig. 10C is an enlarged view showing a part of Fig. 10B. Fig.

The inner yoke 210, which shields the magnetic field and limits the external leakage of the magnetic field in the embodiment, is integrally formed with the cover member 200 on the upper inner circumferential surface of the cover member 200. At this time, the cover member 200 mainly shields the magnetic field leaking from the upper surface and the outer surface of the cover member 200, and the inner yoke 210 mainly shields the magnetic field leaking toward the inner circumferential surface. Therefore, the cover member 200 and the inner yoke 210 are integrally formed, so that the cover member 200 can function as the inner yoke 210. In addition, the cover member 200 and the inner yoke 210 may be formed of a magnetic material.

In the embodiment, the inner yoke 210 is formed in a circular shape in a first direction or a plane, but is not limited thereto, and may be formed in a polygonal shape. The winding ring 180 and the coil 190 may have a circular or polygonal cross section corresponding to the shape of the circular or polygonal shape of the inner yoke 210. However, May be formed differently from the shape of the coil 190 or the inner yoke 210. [

At this time, since the outer surface of the inner yoke 210 and the inner surface of the cover member 200 are spaced apart from each other by a certain distance, a receiving portion 220 is formed therebetween. That is, the receiving portion 220 is formed as a space formed between the inner yoke 210 and the cover member 200, and has an upper end closed and a lower end opened, and is formed in the circumferential direction of the inner yoke 210 do. Further, unlike the embodiment, there may be only the cover member 200 without the separate inner yoke 210. [

At least a portion of the winding ring 180 and / or the coil 190 may be received in the receiving portion 220. The receiving part 220 includes a first magnet 500 and a second magnet 310 coupled to the bobbin 150 and serving as a sensing device. The second magnet 310 is disposed at a position facing the second magnet 310, 2 Position sensing sensor 320 sensing the position of the magnet 310 in the first direction may be at least partially accommodated.

The first magnet 500 may be provided at least one distance apart from the second magnet 310 in the circumferential direction of the winding ring 180. The first magnet 500 may be provided in a pair such that the second magnet 310 and the position sensing sensor 320 are opposed to each other at the corners located at the corners of the accommodating portion 220 .

At this time, the first magnet 500 may be formed as a trapezoidal column so as to correspond to the corner of the receiving portion 220, but not limited thereto, and may be formed in a polygonal shape such as a triangular shape. This trapezoidal shape may also minimize magnetic field leakage from the corners of the cover member 200 to the outside. In addition, each corner of the prismatic first magnet 500 may include a curved surface, which may be a curved surface or a curved surface.

The arrangement structure of the first magnet 500, the second magnet 310 and the position sensing sensor 320 in the accommodating portion 220 is an optimized arrangement structure considering the shape of the accommodating portion 220 of the embodiment. However, the first magnet 500, the second magnet 310, the position sensing sensor 320, and the like may be disposed in the accommodating portion 220 in a different manner, not limited to the above arrangement.

For example, the first magnet 500 may be arranged in a total of two, four, eight, or the like so as to face each other on the surface portion, not the corner portion of the receiving portion 220, But it may have a rectangular parallelepiped or a square or quadrangular prism shape. Such an arrangement structure may also be varied depending on the shapes of the cover member 200 and the inner yoke 210. In addition, each corner of the prismatic first magnet 500 may include a curved surface, which may be a curved surface or a curved surface.

In the embodiment, when the integral inner yoke 210 having the structure described above is used, the amount of foreign matter introduced into the upper end of the lens driving apparatus can be significantly reduced. That is, since the inner yoke 210 is disposed in at least a part of the space formed between the upper portion of the bobbin 150 and the winding ring 180, the path through which the foreign material flows is complicated, Can be significantly reduced.

In the embodiment, the outer side surface of the inner yoke 210 and the inner side surface of the winding ring 180 are provided at the accommodating portion 220 so as to correspond to each other with a constant distance l. The spacing distance l effectively corresponds to the tilt generated when the bobbin 150 moves in the first direction.

This tilting phenomenon is caused by the fact that the electromagnetic force applied to the bobbin 150 is biased or the bobbin 150 is not moved in the first direction and is inclined in the second and / In the direction of movement.

Even if the tilting phenomenon occurs, the movement of the bobbin 150 in the first direction is restricted or unnatural due to the friction generated due to excessive contact between the winding ring 180 and the inner yoke 210 Can be prevented. In addition, wear or breakage of the bobbin 150 and / or the winding ring 180 due to such friction can be significantly reduced.

11A is a bottom view showing a specific portion of a lens driving apparatus according to an embodiment. 11B is a plan view showing a specific portion of the lens driving apparatus according to the embodiment. Hereinafter, a specific structure of the embodiment will be described with reference to Figs. 1A, 1B, 11A, 11B and the like.

The energizing member 600 is provided on the lower side of the bobbin 150 and is electrically connected to the coil 190 coupled to the bobbin 150. In an embodiment of the energizing member 600, a flexible circuit board 600a may be used as shown in Fig. 1A, and a leaf spring may also be used. When a leaf spring is used, .

The flexible circuit board 600a is provided below the mover 100 and is electrically connected to the coil 190. The flexible circuit board 600a is deformed in the first direction corresponding to the first direction movement of the mover 100, Or the like.

In the embodiment, the flexible printed circuit board 600a is electrically connected to the coil 190 to supply current, and the first movement of the bobbin 150 is performed by the displacement sensing unit 300, which will be described later, Controlled by a control driver (not shown). Therefore, in the embodiment, the configuration of the lens driving apparatus can be simplified.

11A, the flexible printed circuit board 600a is coupled to the lower portion of the bobbin 150 at one side and the other end is coupled to the second circuit board 610 at the other side. The flexible printed circuit board 600a is connected to the first protrusion 151 formed at the lower end of the bobbin 150 and the other end is connected to the second circuit board 610 by a conductive adhesive material Can be combined. At this time, the flexible circuit board 600a may be formed with a coupling hole 601 or a coupling groove for coupling with the first projection 151.

The flexible circuit board 600a may be disposed between the bobbin 150 and the base 700 in a second direction and / or a third direction perpendicular to the first direction. When the bobbin 150 moves upward in the first direction, for example, when the bobbin 150 moves upward, the portion of the flexible circuit board 600a coupled with the bobbin 150 moves upward, And the area joined with it also falls.

Further, the embodiment has the effect of reducing the cost and simplifying the process. Further, the first magnet 500 may be composed of four.

The flexible circuit board 600a may further include a second circuit board 610 attached to one side of the base 700 and / or the cover member 200 and electrically connected to the flexible circuit board 600a. The second circuit board 610 can electrically connect the flexible printed circuit board 600a to the control driver and the position sensing sensor 320 can be mounted on the second circuit board 610. [

At this time, the second circuit board 610 may be formed of a flexible material similar to the flexible circuit board 600a, but may be formed of a rigid material. The second circuit board 610 may be formed of a flexible material or a solid material in consideration of the structure of the entire lens driving apparatus, the easiness of manufacturing the second circuit board 610, the manufacturing cost, and the like.

As another embodiment of the energizing member 600, the elastic member 600b may be used as shown in Fig. 1B. The elastic member 600b may be electrically connected to the bobbin 150 on one side and the second circuit board 610 on the other side.

In the embodiment, the elastic member 600b has a shape similar to that of the lower elastic member used in a general lens driving apparatus, and electrically connects the coil 190 disposed on the bobbin 150 and the second circuit substrate 610, It can serve to apply a current to the coil 190. Considering the cost of the flexible circuit board 600a and one elastic member 600b, the elastic member 600b is more inexpensive, which is advantageous in terms of cost saving.

Unlike the embodiment, the lens driving device is electrically connected to the coil 190 to supply electric power to the coil 190 and supports the bobbin 150 in the first direction elastically or elastically And an elastic member provided on the upper and lower portions of the bobbin 150.

The base 700 may be coupled to the lower end of the cover member 200 and may include a base leg 720. The base lever 720 may protrude in the first direction to support the first magnet 500 disposed inside the cover member 200. [

Accordingly, the base rails 720 may be provided in the same number as the first magnets 500 at positions corresponding to the first magnets 500, or may be provided at the corners of the first magnets 500 irrespective of the first magnets 500. [ A total of four may be formed. The base rack 720 may be provided in such a form as to support the first magnet 500 by forming a step (not shown) at the upper end of the base ring 720 to allow a part of the lower end of the first magnet 500 to be seated . Alternatively, the upper end of the base lever 720 and the lower end of the first magnet 500 may be fixed or coupled using an adhesive such as epoxy.

The displacement sensing unit 300 may determine a displacement value of the bobbin 150 in the first direction and may include a second magnet 310 and a position sensing sensor 320.

1A and 1B, the second magnet 310 is installed on the bobbin 150 of the mover 100, and the position sensing sensor 320 is mounted on the bobbin 150 of the mover 100, May be provided inside the cover member 200 and may have a predetermined distance from the second magnet 310 at a position corresponding to the second magnet 310.

In another embodiment of the displacement sensing unit 300, the second magnet 310 and the position sensing sensor 320 may be disposed at positions opposite to the above embodiments, respectively. That is, the position sensing sensor 320 is installed in the bobbin 150 of the mover 100, and the second magnet 310 is provided in the cover member 200 and is located at a position corresponding to the position sensing sensor 320 The position sensor 320 may be spaced apart from the position sensor 320 by a predetermined distance.

Meanwhile, the bobbin 150 may further include a third magnet 155. 11B, the third magnet 155 is provided to be coupled to the bobbin 150 at a position symmetrical to the second magnet 310, and the magnetic force generated by the second magnet 310 and / Or to counterbalance weight bias. Accordingly, the third magnet 155 can reduce the tilt phenomenon of the bobbin 150 and the lens barrel due to the bias of the magnetic force and / or the weight by canceling the magnetic force bias by the second magnet 310.

In addition, even when the position sensing sensor 320 is installed on the bobbin 150, the third magnet 155 may be coupled to the bobbin 150 at a position symmetrical to the position sensing sensor 320 have.

The position sensing sensor 320 may be a displacement sensing unit 300 for determining a displacement value of the bobbin 150 in the first direction together with a second magnet 310 installed on the bobbin 150 . The position sensing sensor 320 may be disposed at a position corresponding to the position of the second magnet 310 to sense the relative movement of the second magnet 310.

The position sensing sensor 320 may be a sensor for sensing a change in magnetic force emitted from the second magnet 310 of the bobbin 150. Also, the position sensor 320 may be a Hall sensor. However, the present embodiment is not limited to the Hall sensor, and any sensor that can detect a change in magnetic force can be used, and a sensor capable of detecting a position in addition to the magnetic force is also possible. For example, It is also possible to use a reflector or the like.

A second circuit board 610 electrically connected to the coil 190 through the energizing member 600 and an image sensor are mounted on a control driver provided outside and / Respectively. According to this connection method, the movement of the bobbin 150 in the first direction is controlled by the control driver in a feedback or closed loop manner.

The movement of the bobbin 150 in the first direction is for auto focusing, that is, for automatically focusing the image of the object on the image sensor surface. The feedback control by the control driver for autofocusing is performed as follows.

The control driver receives the first displacement value of the bobbin 150 measured by the displacement detector 300 and the image of the object imaged on the image sensor and determines whether the focus of the object is appropriate. When the focus of the subject is not appropriate, the amount of current supplied to the bobbin 150 is changed to move the bobbin 150 in the first direction, and the control driver receives the first direction displacement value and the image of the subject again, It is judged to be inappropriate.

By repeating this process, the control driver finds the proper focus of the subject. As a result, the control driver repeatedly adjusts the first direction displacement value of the bobbin 150 to perform autofocusing, and this process proceeds in a feedback control manner as described above.

Meanwhile, the camera module including the lens driving device may include a cover member 200, a bobbin 150, a lens barrel, an energizing member 600, an image sensor, and a printed circuit board.

The cover member 200 is formed in a hollow shape, and as described above, the inner yoke 210 that shields the magnetic field can be integrally formed. The bobbin 150 may be provided inside the cover member 200 and may be movable in a first direction by an electromagnetic interaction.

The lens barrel is coupled to the inside of the bobbin 150, and the coupling method can be threaded or other various combinations as described above. The energizing member 600 is provided on the lower side of the bobbin 150 and is electrically connected to the coil 190 coupled to the bobbin 150 as described above.

The image sensor is provided at a lower portion of the base 700, and an image of an object incident through the lens barrel is imaged. The printed circuit board is electrically connected to the image sensor, and image information of the object acquired from the image sensor can be received.

The embodiment uses the closed-loop control method, so that the autofocusing can be performed accurately and quickly.

In addition, since the upper elastic member is not used, the height of the upper surface of the bobbin 150 is relatively freely adjusted. Therefore, the bonding operation is facilitated when the lens or the lens barrel is assembled to the bobbin 150.

Since the coil 190 is wound around the bobbin 150 and the bobbin 150 by the heat or tension generated during the winding of the coil 190, Can be remarkably reduced, and the change of the lens assembly torque can be remarkably reduced.

12A and 12B are plan and bottom perspective views showing a cover member 200 according to an embodiment. 13 is a perspective view of a bobbin 150 according to one embodiment.

In the embodiment, the inner yoke may be formed in a concave-convex shape to form the first concave-convex portion 211.

In addition, in the embodiment, the bobbin 150 may be provided with the second concave-convex portion 153. The second concavo-convex part 153 may have a concavo-convex shape in the first direction and may be formed so as to form a closed curve having the same shape as that of the bobbin 150 when viewed in the first direction as a whole.

At this time, the first concave-convex portion 211 is formed downward, the second concave-convex portion 153 is formed upward, and the first concave-convex portion 211 and the second concave- So that they can be engaged with each other. Therefore, when the cover member 200 including the bobbin 150 and the inner yoke is coupled, the bobbin 150 and the cover member 200 are coupled to each other by the first concave / convex portion 211 and the second concave / convex portion 153, It is possible to prevent rotation relative to each other.

In the drawing, rectangular shapes are shown as one embodiment of the first concave-convex portion 211 and the second concave-convex portion 153, but the present invention is not limited thereto. That is, the first concave and convex portions 211 of the cover member 200 are provided in at least one of a rectangular shape, a trapezoid shape, a triangular shape, and a circular shape, and the second concave- May be formed in a shape that can be engaged with the first concavoconvex portion 211.

The first concave-convex portion 211 and the second concave-convex portion 153 may be formed in various shapes other than the above-described shapes so long as they can engage with each other, and the continuous concave-convex portion may have a symmetrical and / There is no need.

Meanwhile, when the first concave-convex portion 211 is formed in a rectangular shape, the third concave-convex portion 211a may be additionally formed in the first concave-convex portion 211. The third concave and convex portion 211a is formed at the end portion of the protruding portion of the first concave and convex portion 211 and the first concave and convex portion 211 of the cover member 200 is in contact with the second concave and convex portion 153 of the bobbin 150, So that the noise generated due to the contact between the bobbin 150 and the cover member 200 can be reduced.

In addition, when the second concave-convex portion 153 is formed in a rectangular shape, the fourth concave-convex portion 153a may be additionally formed in the second concave-convex portion 153. The fourth concave and convex portion 153a is formed at an end portion of the protruding portion of the second concave and convex portion 153 and the second concave and convex portion 153 of the bobbin 150 is formed in the first concave and convex portion 211 of the cover member 200, So that the noise generated due to the contact between the bobbin 150 and the cover member 200 can be reduced.

At this time, like the first concave-convex portion 211 and / or the second concave-convex portion 153, the third concave-convex portion 211a and / or the fourth concave-convex portion 153a, But not limited to. That is, the third irregular portion 211a and / or the fourth irregular portion 153a may be formed in at least one of a rectangular shape, a trapezoidal shape, a triangular shape, and a wavy shape, And it is not necessary that the continuous convexo-concaves have a symmetrical and / or constant shape.

14 is a perspective view of a winding ring 180 according to one embodiment. 15 is a perspective view showing a state where the bobbin 150, the winding ring 180, and the coil 190 according to one embodiment are combined.

In the embodiment, the rotation preventing portion 181 for preventing the rotation of the winding ring 180 may be provided at the upper end of the winding ring 180. This can prevent rotation of the winding ring 180 as well as the engagement stop B2S2. In the embodiment, the rotation preventing portion 181 for preventing the rotation of the winding ring 180 may be provided at the upper end of the winding ring 180. 4 to 8, the rotation preventing portion 181 may be provided in each of the embodiments of the winding ring 180 described above.

The rotation preventing portion 181 may have at least one bent portion at the upper end of the winding ring 180 and an end portion linearly corresponding to the inner side surface of the cover member 200 at least partially formed in a plane.

Specifically, the rotation preventing portions 181 are provided in at least one pair, and are provided at positions facing each other. The rotation preventing portions 181 are formed in the inner surface of the cover member 200, May be provided symmetrically or radially at the top of the ring 180.

In the embodiment, four rotation preventing portions 181 are formed at the upper end of the winding ring 180 so as to be radially bent, but two anti-rotation portions 181 facing each other may be formed. Further, when the cover member 200 is formed into an octagonal shape, the rotation preventing portions 181 may be formed symmetrically or two, four, or eight in a radial direction. The rotation preventing portions 181 may be provided in an odd number or an even number. In addition, a plurality of rotation preventing portions 181 corresponding to one portion of the inner side surface of the cover member 200 may be provided.

When the lens barrel is rotated to fasten the lens barrel or the like to the screw thread in the assembling process of the lens driving device, the rotation preventing portion 181 contacts at least a part of the cover member 200 or at least a part of the inner surface of the cover member 200, There is an effect that the occurrence of an assembling failure can be remarkably reduced. The rotation preventing portion 181 is disposed at a position corresponding to each of the protrusions of the inner yoke 210, that is, the concave portion of the inner yoke 210, The protrusions and the rotation preventing portions 181 may be alternately arranged.

Since both the engagement step B2S2 and the rotation preventing part 181 prevent rotation of the winding ring 180, the engagement ring B2S2 and the rotation preventing part 181 , Or only one of the stopping step B2S2 and the rotation preventing part 181 may be selected and formed.

The camera module according to the embodiment may include a lens barrel coupled to the bobbin 150, an image sensor (not shown), a printed circuit board (not shown), and an optical system.

The lens barrel is as described above, and the printed circuit board can form the bottom surface of the camera module from the portion where the image sensor is mounted.

Further, the optical system may include at least one or more lenses that transmit images to the image sensor. At this time, the optical system may be provided with an actuator module capable of performing autofocusing function and camera-shake correction function. Actuator modules that perform autofocusing can be configured in various ways, and a voice coil unit motor is generally used. The lens driving apparatus according to the above-described embodiment can perform the role of an actuator module that performs both the auto focusing function and the camera shake correction function.

In addition, the camera module may further include an infrared cut filter (not shown) or a blue filter (not shown). The infrared cut filter blocks or absorbs the infrared light from entering the image sensor. In this case, in the base 700 illustrated in FIG. 1, an infrared cutoff filter may be installed at a position corresponding to the image sensor, and may be combined with a holder member (not shown). Further, the base 700 can support the upper side of the holder member.

A separate terminal member may be provided in the base 700 for energizing the printed circuit board, or a terminal may be integrally formed using a surface electrode or the like. Meanwhile, the base 700 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 700. However, this is not essential, and although not shown, a separate sensor holder may be disposed below the base 700 to perform its role.

While only a few have been described above with respect to the embodiments, various other forms of implementation are possible. The technical contents of the embodiments described above may be combined in various forms other than mutually incompatible technologies, and may be implemented in a new embodiment through the same.

150: Bobbin
153: second concave /
153a: fourth concave-convex portion
155: third magnet
180: winding ring
181:
190: Coil
200: cover member
210: inner yoke
211: first uneven portion
211a: third uneven portion
300: Displacement sensing unit
310: second magnet
320: Position sensor
500: first magnet
600:
600a: Flexible circuit board
600b: elastic member
601: Coupling hole

Claims (30)

A cover member;
A bobbin provided in the cover member and movable in a first direction by an electromagnetic interaction;
A winding ring coupled to the bobbin;
An energizing member provided at a lower portion of the bobbin; And
A position sensing sensor and a sensing magnet respectively coupled to any one of the cover member and the bobbin;
And the lens driving device. The method according to claim 1,
An inner yoke formed integrally with the cover member on the inner side of the cover member; And
A second circuit board electrically connected to the energizing member;
Further comprising: a lens driving unit for driving the lens; 3. The method of claim 2,
Wherein the inner yoke forms a first concavo-convex portion, and the bobbin has a second concavo-convex portion engaged with the first concavo-convex portion. The method according to claim 1,
Wherein the energizing member is formed of a flexible circuit board or an elastic member. The method according to claim 1,
Wherein one end of the energizing member is coupled to a lower portion of the bobbin, and the other end is coupled to the second circuit board. 3. The method of claim 2,
Further comprising a displacement detector for determining a displacement value of the bobbin when the bobbin moves in the first direction. The method according to claim 6,
The displacement sensing unit may include:
A second magnet coupled to the bobbin and serving as the sensing magnet; And
And the position sensor coupled to the second circuit board and having a predetermined distance from the second magnet at a position corresponding to the second magnet. 8. The method of claim 7,
Wherein the bobbin is provided with a third magnet coupled to the bobbin at a position symmetrical to the second magnet and offsetting a bias of magnetic force and / or weight by the second magnet. The method according to claim 6,
The displacement sensing unit may include:
The second magnet coupled to the second circuit board; And
And a position sensor coupled to the bobbin and having a predetermined distance from the second magnet at a position corresponding to the second magnet. The method according to claim 1,
And a coil for applying a current for moving the bobbin in the first direction is wound on an outer circumferential surface of the winding ring. The method of claim 3,
Wherein the first concavo-convex portion of the cover member is formed in a rectangular shape, and a third concavo-convex portion is formed at an end portion of the protruding portion of the first concavo-convex portion. 12. The method of claim 11,
The third concavo-
Wherein at least one of a rectangular shape, a trapezoidal shape, a triangular shape, and a wavy shape is provided. The method of claim 3,
Wherein the second concavo-convex portion of the bobbin is formed in a rectangular shape, and a fourth concavo-convex portion is formed at an end portion of the projected portion of the second concavo-convex portion. 14. The method of claim 13,
The fourth concavo-
Wherein at least one of a rectangular shape, a trapezoidal shape, a triangular shape, and a wavy shape is provided. 3. The method of claim 2,
The cover member
And a first magnet for moving the bobbin is provided inside the lens holder. 16. The method of claim 15,
Wherein the bobbin is provided with at least one lens therein, the winding ring is coupled to an outer circumferential surface of the bobbin, a coil is wound on an outer circumferential surface of the winding ring, and the coil is electromagnetically interacted with the first magnet, To move in the first direction. 17. The method of claim 16,
Wherein the inner yoke is formed in a circular or polygonal cross-section as viewed in the first direction, and the winding ring and the coil are formed in a circular or polygonal cross-section corresponding to the shape of the inner yoke. 16. The method of claim 15,
Further comprising a base coupled to a lower end of the cover member, wherein the base includes a base leg protruding in a first direction to support the first magnet. 19. The method of claim 18,
The base-
Wherein the first and second magnets are provided in the same number as the first magnet at positions corresponding to the first magnet. 16. The method of claim 15,
The first magnet may include:
Wherein the cover member is provided inside a corner of the cover member facing each other. A cover member;
An inner yoke formed inside the cover member in a concavo-convex shape integrally with the cover member;
A bobbin provided inside the cover member and movable in the first direction by an electromagnetic interaction to form a concavo-convex portion capable of engaging with the concavo-convex shape of the inner yoke;
A position detection sensor provided inside the cover member and sensing a first movement position of the bobbin; And
A first magnet disposed within the cover member to move the bobbin;
And the lens driving device. 22. The method of claim 21,
The cover member is formed in a rectangular shape in side view in the first direction, and the position detecting sensor is provided at an edge of the cover member, and the first magnet has a corner where the position detecting sensor is provided, Wherein at least one lens unit is provided in the cover member at an edge other than an opposite corner. 22. The method of claim 21,
And a second magnet coupled to the bobbin and having a predetermined distance from the position sensor at a position corresponding to the position sensor. 24. The method of claim 23,
Wherein a winding ring is coupled to an outer circumferential surface of the bobbin and at least one of the first magnets is spaced apart from the second magnet by a predetermined distance in a circumferential direction of the winding ring. A cover member;
An inner yoke formed inside the cover member in a concavo-convex shape integrally with the cover member;
A bobbin provided inside the cover member and movable in the first direction by an electromagnetic interaction, the bobbin being provided with a concave / convex portion engageable with the concavo-convex shape of the inner yoke;
A winding ring coupled to an outer circumferential surface of the bobbin; And
A coil coupled to an outer circumferential surface of the winding ring;
And the lens driving device. 26. The method of claim 25,
The winding ring
And a rotation preventing portion for preventing the rotation of the winding ring is provided at an upper end of the rotation preventing portion. 27. The method of claim 26,
The rotation-
Wherein at least one end portion of the cover ring is linearly bent so as to correspond to an inner side surface of the cover member at least partially bent at an upper end portion of the winding ring and provided at least partially in a plane. 26. The method of claim 25,
The winding ring
And a locking protrusion protruding from the lower end toward the center of the winding ring to increase a coupling force between the bobbin and the winding ring. 29. The method of claim 28,
Wherein the plurality of latching jaws are provided so as to be symmetrical with respect to the center of the winding ring, respectively. 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 29.

Images