KR20160009387A - Lens moving apparatus - Google Patents

Abstract

According to an embodiment of a lens driving device, the lens driving device can comprise: a hollow cylindrical housing which supports a magnet for driving; a bobbin provided with a coil at the outer peripheral surface thereof to be disposed at the inner side of the magnet for driving, and moves in a first direction inside the housing by an electromagnetic interaction between the magnet and the coil; a base arranged at the lower part of the bobbin with an interval from the bobbin; an upper side elastic member provided at the upper side of the bobbin, wherein an inner frame is coupled to the bobbin and an outer frame is coupled to the housing; and a support member which is coupled to the base on the lowr part, has a protruding portion which protrudes upward and is bent on at a portion thereof, wherein at least a part of the bent portion of the protruding portion is coupled to the upper side elastic member.

Description

[0001] LENS MOVING APPARATUS [0002]

The present invention relates to a lens driving apparatus, and more particularly, to a lens driving apparatus which improves the effect of an anti-shake 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.

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 order to further improve such a camera shake prevention device, there is a need for a structural improvement of a lens driving device for aligning a focal length of an optical axis of a lens in a camera module or performing an anti-shake function.

Therefore, it is an object of the present invention to provide a lens driving apparatus in which the effect of the shaking motion prevention function is improved.

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 hollow columnar housing for supporting a driving magnet; A bobbin disposed on an outer circumferential surface thereof and having a coil disposed inside the driving magnet and moving in a first direction inside the housing by an electromagnetic interaction between the driving magnet and the coil; A base disposed at a lower portion of the bobbin and spaced apart from the bobbin by a predetermined distance; An upper elastic member provided on the upper side of the bobbin, wherein the inner frame is engaged with the bobbin, and the outer frame is engaged with the housing; And a lower portion coupled to the base and having a projection protruding upward and at least partially bent, and at least a part of the bent portion of the projection may engage with the upper elastic member.

The supporting member may be provided such that the lower surface of the bent portion of the protrusion and the upper surface of the upper elastic member are opposed to each other, and the elastic member and the bent portion are bonded to each other by the conductive bonding material.

The conductive bonding material may be a solder or a conductive adhesive.

The soldering portion formed by brazing may be formed to be fixed to cover at least a part of the bent portion, to be coupled with the upper elastic member, and to be convex toward the upper side of the upper elastic member.

The soldering portion may be formed on the upper side of the upper elastic member.

The projecting portion may be formed integrally with the support member.

The protrusion may be formed separately and coupled to the support member by forming a bent portion.

The supporting member may include: a first engaging portion having the protruding portion and engaged with the upper elastic member; A second engaging portion for engaging with the base; A first elastic deforming portion extending from the first engaging portion; And a second elastic deforming portion extending from the second engaging portion.

The supporting member may be provided in four, and each of the supporting members may be arranged to surround the bobbin and be arranged to be symmetrical to each other.

The protrusions may be arranged in a plurality of positions spaced apart from each other by a predetermined distance in a second direction perpendicular to the first direction.

The bent portion may be disposed at an angle of -30 to 30 degrees with the upper surface of the upper elastic member.

The bent portion may have a bending radius of 0 to 300 탆.

The bent portion may have a width of 80 탆 to 1000 탆.

The bent portion may have a length of 100 m to 1000 m.

One embodiment of the lens driving device may further include a lower elastic member provided below the bobbin, the inner frame coupled with the bobbin, and the outer frame coupled with the housing.

The support member may further include a connecting portion connecting the first elastic deformation portion and the second elastic deformation portion to each other.

According to the lens driving apparatus of the above-described embodiment, the joining operation between the bent portion and the upper elastic member is facilitated by the shape of the solder. Further, since the area of the lower surface of the soldering portion is wide, the soldering portion can firmly engage with the upper elastic member, so that the connection between the support member and the upper elastic member becomes strong.

In addition, when the brazing operation is performed using the support member having the structure of the above embodiment, the brazing operation is much easier than in the prior art, and the bonding strength between the upper elastic member and the support member through the brazing operation can be further enhanced There are advantages.

In addition, according to the above-described embodiment, the distance by which the support member can move in the second and / or third directions toward the cover member can be much longer than in the conventional structure, , It is possible to more effectively correct the shaking motion by the supporting member.

1 is a perspective view schematically showing a lens driving apparatus according to an embodiment.
2 is an exploded perspective view showing a lens driving apparatus according to an embodiment.
3 is a perspective view of a housing according to one embodiment.
4 is a rear perspective view of a housing according to an embodiment.
5 is a plan view showing an upper elastic member according to an embodiment.
6 is a plan view showing a lower elastic member according to an embodiment.
7 is a perspective view illustrating a state in which a support member according to an embodiment is disposed.
8 is a front view showing a support member according to an embodiment.
9 is a front view showing a supporting member according to another embodiment.
10 is a partial perspective view showing a manner in which a support member according to an embodiment is coupled to an upper elastic member.
11 is a partial perspective view showing a manner in which the support member according to the embodiment is coupled to the upper elastic member.
12 is an enlarged perspective view illustrating a manner in which a support member according to an embodiment is coupled to an upper elastic member.
13 is a cross-sectional view illustrating an embodiment in which a support member according to an embodiment is coupled to an upper elastic member by soldering.

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 .

1 is a perspective view schematically showing a lens driving apparatus according to an embodiment. 2 is an exploded perspective view showing a lens driving apparatus according to an embodiment. 3 is a perspective view of a housing 140 according to one embodiment. 4 is a rear perspective view of a housing 140 according to one embodiment. 5 is a plan view showing an upper elastic member 150 according to an embodiment. 6 is a plan view showing a lower elastic member 160 according to an embodiment.

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 first direction or may be moved relative to a plane perpendicular to the optical axis to perform a camera-shake correction operation And / or an auto focusing operation.

As shown in FIGS. 1 and 2, the lens driving apparatus according to the embodiment may include the movable unit 100. At this time, the movable unit 100 can perform functions of auto focusing and correction of camera shake.

The movable part 100 includes a bobbin 110, a coil 120, a first magnet 130, a housing 140, an upper elastic member 150, and a lower elastic member 160, as shown in FIG. can do.

The bobbin 110 includes a coil 120 disposed on an outer circumferential surface of the first magnet 130 and an electromagnetic interference between the first magnet 130 and the coil 120, 140 in the first direction. A coil 120 may be installed on the outer circumferential surface of the bobbin 110 to enable electromagnetic interaction with the first magnet 130.

Further, the bobbin 110 is elastically supported by the upper and lower elastic members 150 and 160, and can perform the auto focusing function by moving in the first direction.

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 auto focusing function is controlled according to the direction of the current, and the auto focusing function may be realized by moving the bobbin 110 in the first direction. For example, when the forward current is applied, the bobbin 110 can move upward from the initial position, and when the reverse current is applied, the bobbin 110 can move downward from the initial position. Alternatively, the amount of the unidirectional current may be adjusted to increase or decrease the moving distance from the initial position to one direction.

A plurality of upper support protrusions 113 (see FIG. 7) and lower support protrusions (not shown) may be formed on the upper and lower surfaces of the bobbin 110. The upper support protrusion 113 may be formed in a cylindrical shape or a prismatic shape so that the inner frame 151 of the upper elastic member 150 and the bobbin 110 can be engaged and fixed.

According to the embodiment, the first through hole 151a may be formed at a position corresponding to the upper 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. Further, a plurality of upper support protrusions 113 may be provided. 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 protrusions may be cylindrical or prismatic like the upper support protrusions 113 so that the inner frame 161 of the lower elastic member 160 and the bobbin 110 can be engaged and fixed.

According to the 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. The lower support protrusions may be provided as shown in FIG.

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 housing 140 may have a hollow column shape for supporting the first magnet 130 and may be formed in a substantially rectangular shape. According to the embodiment, as shown in FIGS. 3 and 4, the housing 140 may have a substantially octagonal shape . 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 first magnet 130 is installed and the second surface 142 may be a surface on which the support member 220 is disposed.

The first surface 141 may be formed at an edge portion, and may be formed to have an area corresponding to the first magnet 130 or larger than that corresponding to the first magnet. At this time, the first magnet 130 may be fixed to the seating portion 141a of the first magnet 130 formed on the inner surface of the first surface 141.

The first magnet 130 may be formed as a groove corresponding to the size of the first magnet 130. The first magnet 130 may have at least three faces, Can be viewed.

Meanwhile, the first magnet 130 may be fixed to the seating portion 141a of the first magnet 130 with an adhesive, but the present invention is not limited thereto, and an adhesive member such as a double-sided tape may be used. Alternatively, instead of forming the first magnet 130 seating portion 141a as a concave groove as shown in FIG. 4, the first magnet 130 may be formed as a mounting hole through which a part of the first magnet 130 can be exposed or fitted.

A plurality of third stoppers 143 may protrude from the upper surface of the housing 140. The third stopper 143 may limit the upward movement of the housing 140.

3, the third stopper 143 may guide the installation position of the upper elastic member 150. For this purpose, as shown in FIG. 3, A guide groove 155 having a shape corresponding to the stopper 143 may be formed.

The first surface 141 may be disposed parallel to the side surface of the cover member 300 but is not limited thereto and the first surface 141 may have a larger surface than the second surface 142 As shown in Fig.

As shown in FIGS. 3 and 4, the second surface 142 may be formed with an escape groove 142a having a predetermined depth. In the embodiment, the lower surface of the escape groove 142a may form an open opening. However, the present invention is not limited to this, and it is also possible to form an opening in which the upper surface of the escape groove 142a is opened, and an opening in which both the upper surface and the lower surface are opened.

The escape groove 142a prevents spatial interference between the connecting member 153 and the bobbin 110 when the bobbin 110 moves in the first direction with respect to the housing 140 so that the connecting member 153 ) 163 can be more easily deformed. The lower part of the escape groove 142a can prevent the second engaging part 224 of the lower part of the support member 220 from interfering with the housing 140. [ The upper side of the escape groove 142a may form a step 142b as shown in FIG. 4 to support a part of the upper side of the support member 220. [

The position of the escape grooves 142a may be disposed on the side surface of the housing 140 as in the embodiment, but the connection members 153 and 163 of the elastic members 150 and 160, Or may be disposed at the edge of the housing 140 depending on its shape and / or position.

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 152a may be formed in the outer frame 152 corresponding to the upper frame support protrusion 144, and the third through hole 152a may be fixed by adhesive or heat fusion.

As shown in FIG. 4, a plurality of lower frame support protrusions 145 to which the outer frame 162 of the lower elastic member 160 is coupled may be formed on 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.

Meanwhile, the outer frame 162 corresponding to the lower frame support protrusion 145 may have a corresponding fourth through hole 162a and may be fixed thereto by an adhesive or by heat fusion.

A fourth stopper 147 may protrude from the lower side of the housing 140. The fourth stopper 147 may limit a moving distance of the housing 140 in a downward direction. In this case, the fourth stopper 147 prevents the bottom surface of the housing 140 from colliding with the base 210 and / or the printed circuit board 250.

In addition, the fourth stopper 147 may maintain a predetermined distance from the base 210 and / or the printed circuit board 250 during an initial state and a normal operation. With this configuration, the housing 140 can be separated from the base 210 at the lower side, and can be maintained at the first direction height by the support member 220 without being vertically interfered with the cover member 300 at the upper side . Accordingly, the housing 140 may perform the shifting operation in the second and third directions perpendicular to the first direction.

5 and 6, the upper elastic member 150 and the lower elastic member 160 may elastically support the bobbin 110 in the first direction in the upward and / or downward directions. The upper elastic member 150 and the lower elastic member 160 may be formed as leaf springs.

An upper elastic member 150 is provided on the upper side of the bobbin 110. An inner frame is coupled with the bobbin 110 and an outer frame is coupled with the housing 140. [ The lower elastic member 160 is provided on the lower side of the bobbin 110. The inner frame is engaged with the bobbin 110 and the outer frame is coupled with the housing 140. [

The upper elastic member 150 and the lower elastic member 160 include an inner frame 151 coupled to the bobbin 110 and an outer frame 152 and 162 joined to the housing 140 and an inner frame 151 And connecting members 153 and 163 connecting the outer frame 152 and the outer frame 152 to each other.

The connecting members 153 and 163 may be bent at least once to form a predetermined pattern. The bobbin 110 can be elastically (or elastically) supported by the connection members 153 and 163 due to the positional change and micro-deformation of the bobbin 110 in the first direction.

5, the upper elastic member 150 includes a plurality of first through holes 152a in the outer frame 152, and a plurality of second through holes 152a in the inner frame 151. [ 151a.

The first through hole 152a is coupled with the upper frame support protrusion 144 provided on the upper surface of the housing 140 and the second through hole 151a or groove is formed on the upper surface of the bobbin 110 And can be engaged with the upper support protrusion 113. That is, the outer frame 152 is fixed and coupled to the housing 140 through the first through hole 152a, and the inner frame 151 is fixed to the bobbin 110 through the second through hole 151a or groove And can be combined.

The connecting member 153 can connect the inner frame 151 and the outer frame 152 such that the inner frame 151 is elastically deformable in a predetermined range in the first direction with respect to the outer frame 152 have.

At least one of the inner frame 151 and the outer frame 152 of the upper elastic member 150 is electrically connected to at least one of the coil 120 of the bobbin 110 and the printed circuit board 250, One terminal portion 251 may be provided.

6, the lower elastic member 160 has a plurality of insertion grooves 162a or holes in the outer frame 162, and a plurality of third through holes 161a or 161b in the inner frame 161 A groove may be provided.

The insertion hole 162a or hole is engaged with the lower frame support protrusion 147 provided on the lower surface of the housing 140 and the third through hole 161a or groove is formed on the lower surface of the bobbin 110 Can be engaged with the lower supporting protrusions. That is, the outer frame 162 is fixed and coupled to the housing 140 through the insertion groove 162a or the hole, and the inner frame 161 is fixed to the bobbin 110 through the third through hole 161a or groove And can be fixed and coupled.

The connecting member 163 can connect the inner frame 161 and the outer frame 162 so that the inner frame 161 can elastically deform in a predetermined range in the first direction with respect to the outer frame 162 have.

The upper elastic member 150 may include a first upper elastic member 150a and a second upper elastic member 150b, which are separated from each other, as shown in FIG. The first upper elastic member 150a and the second upper elastic member 150b can receive currents of different polarities or different powers from each other through the two-divided structure.

That is, after the inner frame 151 and the outer frame 152 are coupled to the bobbin 110 and the housing 140, the inner frame 151 and the outer frame 152 are coupled to the inner frame 151, A solder portion may be provided at a position of the solder 151 to perform conductive connection such as soldering at the solder portion to receive currents of different polarities or different powers. The first upper elastic member 150a is electrically connected to one of the two ends of the coil 120 and the other of the two ends of the coil 120 and the second upper elastic member 150b are electrically connected to each other. And can receive current and / or voltage from the outside.

The upper elastic member 150 and the lower elastic member 160 may be assembled with the bobbin 110 and the housing 140 through a bonding process using heat fusion and / or an adhesive. 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.

As an alternative embodiment, the lower elastic member 160 may have a two-piece structure, and the upper elastic member 150 may have an integral structure.

At least one of the inner frame 161 and the outer frame 162 of the lower elastic member 160 may be electrically connected to at least one of the coil 120 of the bobbin 110 and the printed circuit board 250 . In addition, the printed circuit board 250 may include at least one first terminal portion 251 that can be electrically connected to the elastic member.

The printed circuit board 250 is coupled to the upper surface of the base 210 and a through hole may be formed at a corresponding position to expose the seating groove 214 of the supporting member 220 as shown in FIG. have.

The printed circuit board 250 may have a surface on which the bent first terminal portion 251 is formed. The embodiment may form a surface on which the printed circuit board 250 is provided with the first folded first terminal portions 251. A plurality of terminals 251b are disposed on a surface on which the first terminal unit 251 is installed to supply an electric current to the coil 120 by receiving external power. The number of the terminals 251b formed in the first terminal portion 251 may be increased or decreased depending on the type of the components to be controlled. In addition, the printed circuit board 250 may have one bent surface and may further include a terminal portion.

The base 210 is disposed at a lower portion of the bobbin, and may be formed in a substantially rectangular shape as shown in FIG. 2, and a supporting member 220 may be fixed to the linear surface. When the cover member 300 is adhered and fixed to the base 210, a step 211 may be formed so that an adhesive may be applied. At this time, the bottom surface of the step can be brought into contact with the end of the cover member 300.

A supporting groove having a corresponding size may be formed on a surface of the base 210 opposite to a portion of the printed circuit board 250 where the first terminal portion 251 is formed. The support groove is recessed inwardly of a predetermined depth from the outer circumferential surface of the base 210 so that the portion where the first terminal portion 251 is formed can be prevented from protruding outward or adjusted.

Meanwhile, the step 211 can guide the cover member 300 coupled to the upper side, and the end portion of the cover member 300 can be coupled to the side surface. At this time, the end portions of the step 211 and the cover member 300 may be adhesively fixed and sealed with an adhesive or the like.

A support member 220 mounting groove 214 into which the support member 220 can be inserted may be concavely formed on the upper surface of the base 210. An adhesive may be applied to the seating groove 214 of the supporting member 220 to fix the supporting member 220 so as not to move.

The end of the support member 220 may be inserted or disposed in the seating groove 214 of the support member 220 and may be fixed with an adhesive or the like. A plurality of or at least one or more than one seating groove 214 may be formed in a straight surface on which the support member 220 is installed. The seating groove 214 may have a substantially rectangular groove.

2, two mounting grooves 214 may be provided for each straight surface in the embodiment, which may be increased or decreased depending on the shape of the supporting member 220, Or more may be formed.

The cover member 300 may be provided in a substantially box shape and may cover the movable unit 100, the printed circuit board 250, and the base 210. 1 and 2, the cover member 300 may have a recess or groove formed at a position corresponding to the step 211 of the base 210, and an adhesive or the like may be injected through the recess or groove. have.

At this time, the adhesive to be injected is set to have a low viscosity, so that the adhesive injected through the escape portion or the groove portion can penetrate the contact position between the step 211 and the end portion of the cover member 300. As described above, the adhesive member applied to the escaping portion or the groove portion fills a gap between opposing surfaces of the cover member 300 and the base 210 through the escaping portion or the groove portion, (Not shown).

An image sensor 810 and a printed circuit board 250 may be disposed under the base 210 and a lens barrel may be assembled to the bobbin 110 to form a camera module. Alternatively, the image sensor holder may further include a separate image sensor holder under the base 210. Alternatively, the base 210 may be extended downward to directly couple the camera module substrate on which the image sensor is mounted to the bottom surface. The camera module may be applied to a mobile device such as a mobile phone.

7 is a perspective view illustrating a state in which a support member 220 according to an embodiment is disposed. 8 is a front view of support member 220 according to one embodiment. 9 is a front view showing a support member 220 according to another embodiment.

The lower part of the support member 220 has a protrusion 226 which is engaged with the base 210 and protrudes upward to at least partially bend the protrusion 226. At least a part of the bending part 226a of the protrusion 226, Can be coupled to the upper elastic member (150).

The support members 220 may be individually disposed on the second surface 142 of the housing 140 to support the housing 140 at a predetermined distance from the base 210 as shown in FIG. One end of the support member 220 may be inserted into the seating groove 214 of the support member 220 and may be fixed with an adhesive such as epoxy and the other end may be formed with a protrusion 226, And the upper elastic member 150 can be engaged with the upper elastic member 150.

The support member 220 is disposed such that the lower surface of the bent portion 226a of the protrusion 226 faces the upper surface of the upper elastic member 150 and the elastic member and the bent portion 226a They can be bonded to each other by a conductive bonding material. At this time, the conductive bonding material may be soldered, conductive adhesive, welding, or the like.

Since the supporting member 220 according to the embodiment is disposed on the second surface 142 of the housing 140, a total of four supporting members 220 may be installed symmetrically. However, the present invention is not limited to this, and it is also possible that the number of each of the two linear surfaces is eight. Further, the support member 220 may be electrically connected to the upper elastic member 150. Or may be electrically connected to the straight surface of the upper elastic member 150.

The supporting member 220 and the upper elastic member 150 are electrically connected to each other through a conductive adhesive agent, soldering, welding, or the like, since the supporting member 220 is formed separately from the upper elastic member 150. [ . Accordingly, the upper elastic member 150 can apply an electric current to the coil 120 through the electrically connected support member 220.

Specifically, in the first embodiment, the support member 220 includes a first engaging portion 221, a second engaging portion 224, a first elastic deforming portion 222, a second elastic deforming portion 223, 225).

In another embodiment, the support member 220 may include a first engaging portion 221, a second engaging portion 224, and an elastically deformable portion, in which case the elastically deformable portion may be a connecting portion.

In the first embodiment, the first engaging part 221 is provided with the protruding part 226 to engage with the upper elastic member 150. The protruding portion 226 protrudes from the first engaging portion 221, and a part of the protruding portion 226 forms a bent portion 226a. The bent portion 226a may be coupled to the upper elastic member 150 by a conductive adhesive, soldering, welding, or the like. Hereinafter, for ease of explanation, the case of soldering is described as an embodiment.

In the case of soldering, for example, a solder cream may be applied so as to cover the bent portion 226a, and the soldering operation may be performed using a soldering mechanism. In addition, the soldering operation may be performed using a solder wire instead of the solder cream.

The protrusion 226 may be integrally formed with the support member 220 or may be separately formed and formed on the upper side of the support member 220 by forming a bent portion 226a.

When the projecting portion 226 is formed separately from the supporting member 220, an operation of joining the projecting portion 226 and the supporting member 220 together is added. However, before the engaging operation, So that it is possible to prevent the product failure of the entire support member 220 due to the formation of the bent portion 226a.

The protrusions 226 may be formed as one, as shown in FIGS. 8 and 9, but may be formed in plural. When a plurality of the protrusions 226 are formed, the protrusions 226 may be bent and spaced apart from each other by a predetermined distance in a second direction perpendicular to the first direction. At this time, the number of the protrusions 226 can be determined in consideration of the ease of coupling between the protrusion 226 and the upper elastic member 150, the interlocking strength between the protrusions 226 and the upper elastic member 150, and the like.

The width W of the protruding portion 226 and the bent portion 226a can be the same and the width W can be easily formed in the protruding portion 226 by the bent portion 226a, The width W of the protruding portion 226 and the bent portion 226a may be set to be 80 μm or more in consideration of the bonding strength between the elastic members 150 and the ease of bonding work using a conductive adhesive or soldering. 1000 mu m.

On the other hand, the length L from the bending point P to the end of the bent portion 226a is the same as the width W of the bent portion 226a in the protruding portion 226, The bonding strength between the upper elastic member 226a and the upper elastic member 150, the ease of bonding work using a conductive adhesive, brazing, welding, etc. Considering these factors, the length L of the bent portion 226a is It is appropriate to select the thickness from 100 mu m to 1000 mu m.

The second engaging portion 224 is a portion that engages with the base 210 and may be provided at the end portion of the support member 220. The second engaging portion 224 may be provided on the plate 210 that is wider than the width of the first and second elastic deformation portions 222, But the present invention is not limited thereto, and it may have a narrow or corresponding width.

8 and 9, each of the second engaging portions 224 may be inserted or disposed in the seating groove 214 of the supporting member 220 of the base 210 . The second engagement portion 224 can be fixedly coupled to the support groove 214 of the support member 220 by an adhesive member such as an epoxy or the like.

However, the present invention is not limited to this, and the support grooves 214 of the support member 220 may correspond to the second engaging portions 224 and may be fitted to each other. Alternatively, one or more second coupling portions 224 may be formed, and two or more supporting portions 220 may be formed on the base 210 to correspond to the second coupling portions 224.

The elastic deforming portions 222 and 223 are provided in a bent shape at least once to form a certain pattern. According to an embodiment, the resiliently deformable portion may include first and / or second resiliently deformable portions 222 and 223, And extends from the first coupling portion 221 and is connected to the coupling portion 225. The second elastic deforming portion 223 extends from the first engaging portion 221 and is connected to the connecting portion 225.

In addition, the connection portions 225 may be formed in a state interposed therebetween, or they may be provided in mutually corresponding shapes. For example, as shown in FIGS. 8 and 9, when the first elastic deformation portion 222 is provided in a zigzag shape by bending more than two times, the second elastic deformation portion 223 may be formed correspondingly, The first elastic deforming portion 222 is not limited and the second elastic deforming portion 223 may be provided in a different shape.

The above is merely an embodiment, 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.

According to the embodiment, the linear portions of the first and second elastic deformation portions 222 and 223 may be formed to be substantially parallel to a plane perpendicular to the first direction.

When the housing 140 is moved in the second and / or third direction, which is a plane perpendicular to the first direction, the elastic deformation portions 222 and 223 are formed in a direction in which the housing 140 moves, It can be elastically deformed finely.

Then, the housing 140 can move in the second and third directions, which are planes substantially perpendicular to the first direction, with almost no change in position in the first direction, thereby improving 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. Here, the longitudinal direction may be a direction connecting the first and second coupling portions 221 and 224.

The connecting portion 225 may be disposed in the middle of the elastic deforming portions 222 and 223 as described above, but not limited thereto, and may be disposed in connection with one elastic deforming portion.

A plurality of holes or grooves may be formed in the connection part 225 to connect the connection part 225 and the housing 140 to each other through the hole or groove. ) Can be constituted by a UV damper or the like.

The first and second elastic deformation parts 222 and 223 are provided in pairs, respectively. However, the first and second joint parts 221 and 224 are formed as one body, And the second elastic deformation portions 222 and 223 can be fixed to the housing 140 and the base 210 at a time.

In addition, each of the support members 220 has one or more engagement portions at both ends thereof, and between the opposite ends of the support member 220, one or more elastic deformation portions may be included.

10 is a partial perspective view illustrating a manner in which the support member 220 according to the embodiment is coupled to the upper elastic member 150. [ 11 is a partial perspective view showing a manner in which the support member 220 according to one embodiment is coupled to the upper elastic member 150. FIG. 12 is an enlarged perspective view illustrating a manner in which the support member 220 is coupled to the upper elastic member 150 according to one embodiment.

In the embodiment, the bent portion 226a of the support member 220 and the upper side elastic member 150 are joined by soldering. At this time, the brazed portion 400 formed by brazing is fixed to cover at least a part of the bent portion 226a, is engaged with the upper elastic member 150, and is directed upward of the upper elastic member 150 It can be formed convexly.

However, as described above, the bending portion 226a of the support member 220 and the upper side elastic member 150 can be coupled with each other using a conductive adhesive other than soldering, 226a and the upper elastic member 150 can be engaged with each other

The bent portion 226a may be disposed at an angle of -30 to 30 degrees with the upper surface of the upper elastic member 150. [ This angle is determined in consideration of the ease of forming the bent portion 226a in the protruding portion 226, the bonding strength between the bent portion 226a and the upper elastic member 150, the ease of bonding work using a conductive adhesive, soldering, or the like Value.

Further, the bent portion 226a may be formed with a bending radius within a range of 0 mu m to 300 mu m. Such a bending radius as in the case of selecting the angle is preferable in terms of easiness of forming the bent portion 226a in the protruding portion 226, bonding strength between the bent portion 226a and the upper elastic member 150, bonding work using the conductive adhesive agent, Ease of use, and the like.

When the bent portion 226a and the upper side elastic member 150 are coupled using the soldering in the embodiment, the solder in the liquid phase has the surface tension, so that the soldering portion 400 is positioned above the upper side of the upper side elastic member 150 Forming a convexly hemispherical shape and solidifying as it is. Accordingly, the soldering portion 400 forms a hemispherical solder ball, and the protrusion 226 surrounds the soldering portion 400 formed of the solder ball.

Therefore, in the embodiment, the shape of the soldering facilitates the bonding operation between the bent portion 226a and the upper elastic member 150. [ In addition, since the area of the lower surface of the soldering part 400 is wide, the soldering part 400 can firmly engage with the upper side elastic member 150. As a result, the connection between the support member 220 and the upper side elastic member 150 It becomes strong.

Therefore, when the brazing operation is performed using the support member 220 having the structure of the above embodiment, the brazing operation is very easy, and the bonding strength between the upper elastic member 150 and the support member 220 through the brazing operation Can be significantly increased.

13 is a cross-sectional view illustrating an embodiment in which the support member 220 according to one embodiment is coupled to the upper elastic member 150 by soldering.

13, the distance D2 between the outer surface of the support member 220 and the inner surface of the cover member 300 and the actual support member 220 toward the cover member 300 The distance D1 that can be moved in the second and / or third directions becomes equal.

Therefore, according to the above-described embodiment, the distance that the support member 220 can move in the second and / or third direction toward the cover member 300 can be much longer, so that the movement space of the support member 220 can be widened Therefore, correction of camera shake by the support member 220 can be performed more effectively.

Meanwhile, the lens driving apparatus according to the above-described embodiments can be used in various fields, for example, a camera module. For example, the camera module can be applied to a mobile device such as a mobile phone.

The camera module according to the embodiment may include a lens barrel coupled to the bobbin 110, an image sensor (not shown), a printed circuit board 250, and an optical system.

The lens barrel is as described above, and the printed circuit board 250 may 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). The infrared cut filter serves to block the infrared light from entering the image sensor. In this case, in the base 210 illustrated in FIG. 1, an infrared cutoff filter may be installed at a position corresponding to the image sensor, and may be coupled to a holder member (not shown). Further, the base 210 can support the lower side of the holder member.

A separate terminal member may be provided on the base 210 for energizing the printed circuit board 250, 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 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.

100: moving part
110: Bobbin
120: Coil
130: first magnet
140: housing
150: upper elastic member
160: Lower elastic member
210: Base
220: Support member
221: first coupling portion
222: first elastic deformation portion
223: second elastic deformation portion
224:
225: Connection
226:
226a:
300: cover member
400: Soldering point

Claims (17)

A hollow columnar housing for supporting the driving magnet;
A bobbin disposed on an outer circumferential surface thereof and having a coil disposed inside the driving magnet and moving in a first direction inside the housing by an electromagnetic interaction between the driving magnet and the coil;
A base disposed at a lower portion of the bobbin and spaced apart from the bobbin by a predetermined distance;
An upper elastic member provided on the upper side of the bobbin, wherein the inner frame is engaged with the bobbin, and the outer frame is engaged with the housing; And
And a lower portion coupled to the base and having a projecting portion projecting upward and at least partially bent, wherein at least a part of the bent portion of the projecting portion engages with the upper elastic member. The method according to claim 1,
Wherein the support member comprises:
And the upper surface of the upper elastic member is opposed to the lower surface of the bent portion of the projecting portion, and the elastic member and the bent portion are coupled to each other by the conductive bonding material. 3. The method of claim 2,
Wherein the conductive bonding material is solder or a conductive adhesive. The method of claim 3,
The soldering portion formed by the soldering may be,
Wherein the elastic member is fixed so as to surround at least a part of the bent portion and is engaged with the upper elastic member and is formed so as to be convex toward the upper side of the upper elastic member. 5. The method of claim 4,
The soldering portion,
And the second elastic member is formed on the upper side of the upper elastic member. 3. The method of claim 2,
The projection
And wherein the supporting member is integrally formed with the supporting member. 3. The method of claim 2,
The projection
Wherein the lens barrel is formed separately and formed with a bent portion, and is coupled to the upper side of the support member. 3. The method of claim 2,
Wherein the support member comprises:
A first engaging portion provided with the projecting portion to engage with the upper elastic member;
A second engaging portion for engaging with the base;
A first elastic deforming portion extending from the first engaging portion; And
And a second elastic deforming portion extending from the second engaging portion. 9. The method of claim 8,
Wherein the support member comprises:
Wherein the bobbins are arranged so as to surround the bobbins, and are arranged to be symmetrical to each other. 3. The method of claim 2,
The projection
Wherein the plurality of lenses are spaced apart from each other by a predetermined distance in a second direction perpendicular to the first direction. 3. The method of claim 2,
The bending portion
And an angle of -30 to 30 degrees with an upper surface of the upper elastic member. 3. The method of claim 2,
The bending portion
And the bending radius is 0 占 퐉 to 300 占 퐉. 3. The method of claim 2,
The bending portion
And the width thereof is 80 占 퐉 to 1000 占 퐉. 3. The method of claim 2,
The bending portion
And the length thereof is 100 占 퐉 to 1000 占 퐉. 3. The method of claim 2,
Further comprising a lower elastic member provided on the lower side of the bobbin, wherein the inner frame is coupled with the bobbin, and the outer frame is coupled with the housing. 9. The method of claim 8,
Wherein the support member comprises:
Further comprising a connecting portion connecting the first elastic deformation portion and the second elastic deformation portion to each other. 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 16.

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