KR20180044559A - Lens driving apparatus, and camera module and mobile device including the same - Google Patents

Abstract

One embodiment of a lens driving device includes a bobbin moving in a first direction; a first coil installed on the outer circumferential surface of the bobbin; a housing having the bobbin installed at the inner side thereof; a first magnet coupled to the housing; an upper elastic member provided on the bobbin and coupled to the bobbin and the housing; a circuit member including a second coil disposed in the lower side of the housing to face the first magnet; a printed circuit board disposed in the lower side of the circuit member and electrically connected to the circuit member; and a plurality of support members connected to the upper elastic member. A coating extension region for expanding the application area of an adhesive may be formed on a portion of the bobbin to which a lens barrel is bonded. The lens driving device is strong against external impact.

Description

[0001] The present invention relates to a lens driving apparatus, a camera module including the lens driving apparatus, and a portable device including the lens driving apparatus,

Embodiments relate to a lens driving device, a camera module including the lens driving device, and a portable device.

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

A mobile phone or a smart phone equipped with a camera module that performs a function of photographing a subject and storing the image or moving image is being developed. Generally, the camera module may include a lens, an image sensor module, and a lens drive device that adjusts the distance between the lens and the image sensor module.

Portable devices such as mobile phones, smart phones, tablet PCs, and notebooks are equipped with ultra-compact camera modules. The lens driving device can perform auto focusing to adjust the focal length of the lens by adjusting the distance between the image sensor and the lens.

In addition, the camera module may be shaken finely due to user's hand movements during photographing of a subject. In order to correct distortion of an image or a moving image due to a shaking of a user, a lens having an optical image stabilizer (OIS) A driving device is being developed.

Therefore, the embodiment relates to a lens driving apparatus having a rigid structure that is resistant to an external impact, a camera module including the lens driving apparatus, and a portable device.

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 bobbin moving in a first direction; A first coil installed on an outer circumferential surface of the bobbin; A housing having the bobbin installed therein; A first magnet coupled to the housing; An upper elastic member provided on the bobbin and coupled to the bobbin and the housing; A circuit member including a second coil disposed below the housing to face the first magnet; A printed circuit board disposed below the circuit member and electrically connected to the circuit member; And a plurality of support members connected to the upper elastic member, wherein a coating extension region extending an application area of the adhesive agent is formed on a portion of the bobbin to which the lens barrel is bonded.

The coating extension region may include an inclined surface having an inclination with respect to the first direction on the inner peripheral surface of the bobbin.

The inclined surface may be arranged to surround the lens barrel on an x-y plane perpendicular to the first direction.

The coating extension region may include a plurality of recesses formed by recessing a part of the inclined surface.

The plurality of recesses may be symmetrically arranged with respect to the center of the bobbin, and may have a predetermined spacing.

The coating extension area may include a plurality of bosses formed by protruding from the inclined surface partly.

The plurality of bosses may be provided symmetrically with respect to the center of the bobbin, and may be spaced apart from each other by a predetermined distance.

The coating extension region may include a step formed on the inclined surface.

The step may be provided in plural in the width direction of the inclined surface.

One embodiment of the lens driving device may further include a lower elastic member provided below the bobbin and coupled to the bobbin and the housing.

One embodiment of the lens driving device may further include a base disposed below the printed circuit board.

The support member may be disposed at a corner of the housing to elastically support the housing.

The inclined surface may be formed in a ring shape.

Another embodiment of the lens driving device includes: a housing; A bobbin accommodated in the housing and for mounting the lens; A first coil disposed on an outer circumferential surface of the bobbin; A first magnet disposed on the side of the housing in correspondence with the first coil; And a base disposed on the lower side of the housing, wherein a coating extension region for expanding the application area of the adhesive agent is formed on a portion of the bobbin to which the lens is bonded.

One embodiment of the camera module comprises: a bobbin moving in a first direction; A first coil installed on an outer circumferential surface of the bobbin; A housing having the bobbin installed therein; A first magnet coupled to the housing; An upper elastic member provided on the bobbin and coupled to the bobbin and the housing; A lower elastic member provided below the bobbin and coupled to the bobbin and the housing; A circuit member including a second coil disposed below the housing to face the first magnet; A printed circuit board disposed below the circuit member and electrically connected to the circuit member; A base disposed below the printed circuit board; A plurality of support members connected to the upper elastic member; And a lens barrel coupled to the bobbin, wherein the bobbin has a coating extension region for expanding a coating area of the adhesive on a portion to be bonded to the lens barrel, and the coating extension region is formed on the inner peripheral surface of the bobbin The inclined surface having an inclination with respect to the first direction, and the inclined surface may be formed with a plurality of depressed grooves, bosses, or steps.

Another embodiment of the camera module may include the lens driving device.

One embodiment of a portable device includes a display module including a plurality of pixels whose color changes by an electrical signal; The camera module converting an image incident through a lens into an electrical signal; And a controller for controlling operations of the display module and the camera module.

In an embodiment, the coating extension area forms an inclined surface, and the inclined surface can expand the application area of the adhesive on both the bobbin side and the lens barrel side, and the adhesion area of the adhesive for bonding the bobbin to the lens barrel The bonding force can be increased.

Further, the coating extension area includes a recessed groove, a boss, or a step, so that the adhesive force of the adhesive for bonding the bobbin and the lens barrel can be increased by expanding the application area of the adhesive together with the inclined surface.

In addition, by increasing the bonding force of the adhesive, even when the lens driving device receives continuous and continuous impact from the outside, the adhesive maintains the bonding force and is prevented from falling off, and the occurrence of failure of the lens driving device can be suppressed.

1 is a perspective view schematically showing a lens driving apparatus of one embodiment.
2A is an exploded perspective view showing a lens driving apparatus according to an embodiment.
FIG. 2B is an exploded perspective view showing the lens driving apparatus of the embodiment different from FIG. 2A. FIG.
3 is a perspective view showing the bobbin of one embodiment.
4 is a perspective view showing a housing of one embodiment.
5 is a perspective view of a bobbin for explaining a coating extension region of an embodiment.
6 is an enlarged view showing part A of Fig.
7 is a plan view showing a lens driving apparatus according to an embodiment.
8 is a cross-sectional view showing a lens driving apparatus according to an embodiment.
9 is an enlarged view showing a portion B in Fig.
10 is a perspective view of a bobbin for explaining a coating extension region of another embodiment.
11 is an enlarged view showing part C of Fig.
12 is a perspective view of a bobbin for explaining a coating extension area of another embodiment.
13 is an enlarged view showing part D of Fig.
14 is a perspective view of a portable device of one embodiment.
Fig. 15 shows a configuration diagram of the portable device shown in Fig.

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 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 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, And may be used 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 of one embodiment. 2A is an exploded perspective view showing a lens driving apparatus according to an embodiment.

An auto focusing device applied to a small camera module of a mobile device such as a smart phone or a tablet PC is a device that automatically focuses an image of a subject on an image sensor (not shown). Such an auto focusing apparatus can be variously configured. In the embodiment, the optical focusing unit can be operated by moving the optical module including the plurality of lenses in the first direction.

As shown in FIG. 2A, the lens driving apparatus according to the embodiment may include a movable portion and a fixed portion. At this time, the movable part can perform the auto focusing function of the lens. The movable part may include a bobbin 110 and a first coil 120. The fixed part may include a first magnet 130, a housing 140, an upper elastic member 150, and a lower elastic member 160 have.

The bobbin 110 is installed in the housing 140 to move in a first direction and has a first coil 120 disposed on the outer circumferential surface of the first magnet 130 and disposed inside the first magnet 130, 130 and the first coil 120 by a magnetic interaction between the first coil 120 and the first coil 120. [ The first 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 LB (see FIG. 7) in which at least one lens is installed. The lens barrel LB can be coupled to the inside of the bobbin 110 in various manners.

For example, female threads are formed on the inner circumferential surface of the bobbin 110, male thread corresponding to the threads is formed on the outer circumferential surface of the lens barrel LB, and the lens barrel LB is screw- 110).

However, the present invention is not limited thereto, and the lens barrel LB may be directly fixed to the inside of the bobbin 110 by a method other than screwing, without forming a thread on the inner peripheral surface of the bobbin 110. [ Alternatively, the one or more lenses of the lens barrel LB may be integrally formed with the bobbin 110 without using the lens barrel LB. However, in the embodiment, the case where the lens barrel LB and the bobbin 110 are bonded by an adhesive will be described.

The lens coupled to the lens barrel LB may be 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 and / or the current amount of the current, and the auto focusing function may be implemented 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 unidirectional current may be adjusted to increase or decrease the movement distance from the initial position in one direction.

The upper and lower surfaces of the bobbin 110 may have a plurality of upper support protrusions and lower support protrusions. The upper support protrusions may be cylindrical or prismatic and may be coupled and fixed to the upper elastic member 150 by guiding the upper elastic member 150.

The lower support protrusions may be cylindrical or prismatic like the upper support protrusions, and may be coupled to and fixed to the lower elastic member 160 by guiding the lower elastic member 160.

The upper elastic member 150 is provided on the upper side of the bobbin 110 and the lower elastic member 160 is provided on the lower side of the bobbin 110 and may be coupled to the bobbin 110 and the housing 140. At this time, a through hole and / or a groove corresponding to the upper supporting protrusion may be formed on the upper elastic member 150, and a through hole and / or groove corresponding to the lower supporting protrusion may be formed on the lower elastic member 160.

Each of the support protrusions and the through holes and / or the grooves may be fixedly joined by an adhesive member such as heat seal or epoxy.

The housing 140 has a hollow pillar shape for supporting the first magnet 130, is formed in a substantially rectangular shape, and can be disposed inside the cover member 300. The first magnet 130 may be coupled to the side surface of the housing 140.

As described above, the bobbin 110, which is guided by the upper and lower elastic members 150 and 160 and moves in the first direction, may be installed inside the housing 140.

In an embodiment, the first magnet 130 may have a rod shape and be coupled to or disposed on a side portion of the housing 140. In another embodiment, the first magnet 130 may have a trapezoidal shape and may be coupled to or disposed at a corner of the housing 140.

Meanwhile, the first magnets 130 may be provided in one or two or more. The first magnet may have a multi-layer structure in which a plurality of first magnets are arranged in the first direction.

The upper elastic member 150 and the lower elastic member 160 can elastically support the bobbin 110 in the first direction in the upward and downward directions. The upper elastic member 150 and the lower elastic member 160 may be formed of, for example, a leaf spring.

As shown in FIG. 2A, the upper elastic member 150 may be provided as two separate members. Each of the divided portions of the upper elastic member 150 can be supplied with different polarity currents or different power sources through the two-divided structure, or can be a current-carrying path.

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

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

The base 210 is disposed on the lower side of the bobbin 110 and the printed circuit board 250, and may be formed in a substantially rectangular shape, and the printed circuit board 250 may be seated. A supporting groove having a corresponding size may be formed on the surface of the base 210 opposite to the portion on which the terminal surface 253 of the printed circuit board 250 is formed. The base 210 may be disposed on the lower side of the housing 140 and may be coupled to the cover member 300.

The support groove is recessed to a certain depth from the outer circumferential surface of the base 210 so that the portion where the terminal surface 253 is formed is prevented from protruding outward or can be adjusted.

The support member 220 is disposed at a corner of the housing 140 and has an upper side coupled to and connected to the upper elastic member 150 and a lower side connected to the base 210, the printed circuit board 250, and the circuit member 231, And the bobbin 110 and the housing 140 can be movably supported in a second direction and / or a third direction perpendicular to the first direction, (Not shown).

The support member 220 may be disposed at a corner of the housing 140 to elastically support the housing 140. A plurality of support members 220 may be provided, and four support members 220 may be installed at the corners of the housing 140, respectively. The support member 200 may be made of an elastically deformable material so that the bobbin 110 and the housing 140 can move on the xy plane.

Alternatively, in the case of another embodiment, two pieces may be arranged at two corners and one piece at the other two corners so that a total of six pieces may be arranged. Or, as the case may be, a total of seven or more.

Further, the support member 220 may be electrically connected to the upper elastic member 150. That is, for example, the support member 220 may be electrically connected to a portion where the through hole of the upper elastic member 150 is formed.

The support member 220 and the upper elastic member 150 are electrically connected to each other through a conductive adhesive agent, soldering, . Accordingly, the upper elastic member 150 can apply an electric current to the first coil 120 through the electrically connected support member 220.

The support member is inserted into the through hole formed in the substrate including the circuit member 231 and the printed circuit board 250, and can be soldered to the substrate. That is, the support member 220 may be electrically connected to the substrate by inserting and soldering the bottom portion of the through hole formed in the circuit member 231 and / or the printed circuit board 250.

Or the support member 220 may be electrically soldered to a corresponding portion of the circuit member 231 without forming a through hole in the circuit member 231 and / or the printed circuit board 250. [

In FIG. 2A, the linear supporting member 220 is shown as an embodiment, but the present invention is not limited thereto. That is, the support member 220 may be provided in the form of a plate-like member or the like.

The second coil 230 moves the housing 140 in the second and / or third direction through the electromagnetic interaction with the first magnet 130 and elastically deforms the support member 220, Correction can be performed.

Here, the second and third directions may include directions substantially in the x-axis (or the first direction), the y-axis (or the second direction) as well as the x- and y-axis directions. In other words, as seen from the driving aspect of the embodiment, the housing 140 may move parallel to the x- and y-axes, but may also be slightly inclined to the x- and y-axes when it is supported by the support member 220 have.

Therefore, the first magnet 130 needs to be installed at a position corresponding to the second coil 230.

The second coil 230 may be disposed to face the first magnet 130 fixed to the housing 140. In an embodiment, the second coil 230 may be disposed outside the first magnet 130. Alternatively, the second coil 230 may be installed at a predetermined distance below the first magnet 130. Alternatively, the second coil 230 may be disposed below the housing 140 so as to face the first magnet 130.

According to the embodiment, a total of four second coils 230 may be provided on four side portions of the circuit member 231, but the present invention is not limited thereto. For example, one second coil 230, Only two can be installed, and four or more can be installed.

Or one in the first direction for the second direction, two in the second direction for the second direction, one in the third direction for the third direction, and two in the fourth direction for the third direction, . Alternatively, in this case, the first side and the fourth side may be adjacent to each other, and the second side and the third side may be adjacent to each other.

A circuit pattern may be formed on the circuit member 231 in the form of a second coil 230 or a separate second coil may be disposed on the circuit member 231. However, A circuit pattern may be formed directly on the member 231 in the form of a second coil 230.

Alternatively, the second coil 230 may be formed by winding the wire in a donut shape, or may be electrically connected to the printed circuit board 250 by forming the second coil 230 in the form of an FP coil.

The circuit member 231 including the second coil 230 may be installed or disposed on the upper surface of the printed circuit board 250 disposed on the upper side of the base 210. [ However, the present invention is not limited thereto. The second coil 230 may be disposed closely to the base 210, may be spaced apart from the base 210, may be separately formed on the substrate, It may also be laminated.

The substrate may be disposed between the housing 140 and the base 210, and may include a circuit member 231 and a printed circuit board 250. At this time, the circuit member 231 and the printed circuit board 250 may be electrically connected to each other.

The circuit member 231 includes a second coil 230 disposed to face the first magnet 130 and may be disposed on the printed circuit board 250.

The printed circuit board 250 is disposed on the lower side of the circuit member 231 and is electrically connected to at least one of the upper elastic member 150 and the lower elastic member 160, And a through hole into which the support member 220 is inserted may be formed at a position corresponding to an end of the support member 220. [ Alternatively, it may be electrically connected or bonded to the support member without forming a through hole.

The supporting member 220 and the circuit member 231 may be formed on the corner of the printed circuit board 250 corresponding to the supporting member 220. In this case, 231 may be formed to facilitate the joining operation.

The printed circuit board 250 is coupled to the upper surface of the base 210 and disposed below the circuit member 231 and can be electrically connected to the circuit member 231. The printed circuit board 250 may be provided with a terminal surface 253 disposed on a side surface of the base 210 and on which the terminal 251 is mounted. The embodiment shows a printed circuit board 250 on which two bent terminal surfaces 253 are formed.

A plurality of terminals 251 are disposed on the terminal surface 253 so that current can be supplied to the first coil 120 and the second coil 230 by receiving a current from an external power source. The number of the terminals 251 formed on the terminal surface 253 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 or more terminal surfaces 253.

The cover member 300 may be provided in the form of a box in which an edge is formed and may receive the movable portion, the second coil 230, a part or all of the printed circuit board 250, . The cover member 300 can protect the movable part, the second coil 230, the printed circuit board 250 and the like, which are accommodated in the cover member 300, from being damaged.

The cover member 300 further restricts the electromagnetic field generated by the first magnet 130, the first coil 120, the second coil 230 and the like from leaking to the outside, .

FIG. 2B is an exploded perspective view showing the lens driving apparatus of the embodiment different from FIG. 2A. FIG. Compared with FIG. 2A, the lens driving apparatus of the embodiment shown in FIG. 2B may not include the support member 230, the second coil 230, and the circuit member 231.

Therefore, the lens driving apparatus of the embodiment shown in FIG. 2B can perform only the auto focusing function without performing the camera-shake correction function. The remaining components except for the support member 230, the second coil 230 and the circuit member 231 have already been described with reference to FIG. 2A, and a duplicate description will be omitted.

Hereinafter, the structure of the bobbin 110 and the housing 140 will be described in more detail with reference to FIGS. 3, 4, and the like. 3 is a perspective view showing the bobbin 110 of one embodiment.

The bobbin 110 may include a first upper support protrusion 113 and a third protrusion 111. The first upper support protrusion 113 is a portion to which a through hole formed in the upper elastic member 150 is coupled. The first upper support protrusion 113 may be formed in a cylindrical shape or other various shapes so that the upper elastic member 150 can be coupled to the bobbin 110 by guiding the upper elastic member 150.

The third protrusion 111 may protrude from the upper surface of the bobbin 110. When the external impact is generated, the upper surface of the third protrusion 111 hits the lower surface of the cover member 300, thereby preventing the plastic deformation exceeding the elastic limit of the spring.

When the initial position of the bobbin 110 is set to a position where the bobbin 110 can no longer descend, autofocusing of the bobbin 110 can be realized with unidirectional control. That is, when the amount of current supplied to the first coil 120 increases, the bobbin 110 rises, and when the amount of supplied current decreases, the bobbin 110 gradually falls and returns to the initial position. Can be implemented.

However, when the initial position of the bobbin 110 is set so as to have a distance at which the bobbin 110 can descend, autofocusing of the bobbin 110 can be implemented with bidirectional control. That is, the autofocusing function can be realized by moving the bobbin 110 upward or downward in the first direction.

For example, when the forward current is applied, the bobbin 110 can move upward, and when the reverse current is applied, the bobbin 110 can move downward.

4 is a perspective view of a housing 140 according to one embodiment. The housing 140 supports the magnet 130 and accommodates the bobbin 110 moving in the first direction.

The housing 140 may be entirely in the form of a hollow column. For example, the housing 140 may have a polygonal (e.g., rectangular, or octagonal) or circular hollow.

The housing 140 may include a second upper support projection 143 and a fourth projection 144. The second upper support protrusion 143 is a portion to which a through hole formed in the upper elastic member 150 is coupled. The second upper support protrusion 143 may be formed in a cylindrical shape or other various shapes so that the upper elastic member 150 can be coupled to the housing 140 by guiding the upper elastic member 150.

The fourth protrusion 144 may protrude from the upper surface of the housing 140. The fourth protrusion 144 may serve to stop the cover member 300 and the body of the housing 140 from stopping each other. That is, when the external impact is generated, the upper surface of the fourth protrusion 144 hits the lower surface of the cover member 300, thereby preventing the cover member 300 and the body of the housing 140 from directly colliding with each other .

The housing 140 may have a third depression 148 at a position corresponding to a portion where the first width W1 of the bobbin 110 is formed.

The surface of the third depression 148 of the housing 140 opposed to the bobbin 110 may have a shape that coincides with the first width W1 which is a portion protruding from the bobbin 110. [ At this time, the first width W1 of the bobbin 110 shown in FIG. 3 and the second width W2 of the third depression 148 of the housing 140 shown in FIG. 4 may have a certain tolerance .

The third depression 148 is arranged to coincide with the first width W1 of the bobbin 110 so that rotation of the bobbin 110 relative to the housing 140 can be suppressed. Accordingly, even if the bobbin 110 is forced to rotate about an optical axis or an axis parallel to the optical axis, the third depression 148 of the housing 140 can inhibit the rotation of the bobbin 110.

A second depression 147 may be formed at the corner of the housing 140. The support member 220 may be connected to the upper elastic member 150 through the second depression 147 in a first direction.

Each of the second depressed portions 147 may be provided at a corner portion of the housing 140. The support member 220 may be disposed so as to pass through any one of the pair of second depressed portions 147 provided at one corner of the housing 140.

In another embodiment, the second depressed portions 147 may be formed at only one corner of the housing 140. 6, the second depressed portion 147 is formed only on the upper left side of the corner portion of the housing 140 through which the support member 220 passes, and the second depressed portion 147 is formed on the lower right side .

Alternatively, a through hole may be formed at the corner of the housing 140 to penetrate the support member 220 instead of the second depression 147. Like the second depressed portion 147, the through holes may be formed in the corner portion of the housing 140, one by one or one by one.

Meanwhile, the housing 140 may include a lower support protrusion (not shown) on a lower surface of a corner portion of the housing 140 for coupling with the lower elastic member 160. The lower support protrusion may have a shape corresponding to a position corresponding to the upper support protrusion, but the present invention is not limited thereto.

The housing 140 may have a plurality of third stoppers 149 projecting from the sides of each side. The third stopper 149 may prevent the housing 140 from colliding with the cover member 300 when the housing 140 moves in the second and third directions.

5 is a perspective view of a bobbin 110 for explaining a coating extension region of an embodiment. 6 is an enlarged view showing part A of Fig. As shown in FIGS. 5 and 6, in the lens driving apparatus of the embodiment, a coating extension region may be formed in the bobbin 110.

In the lens driving apparatus of the embodiment, a lens barrel LB is provided, and the lens barrel LB can be coupled to the bobbin 110 by an adhesive.

At this time, the coating extension region may serve to expand the application area of the adhesive on the bobbin 110 to be bonded to the lens barrel LB.

9, a lens barrel LB is formed with a bonding portion BD to which an adhesive is applied between an upper portion of the inner periphery of the bobbin 110 and an outer periphery of the lens barrel LB corresponding thereto, The bobbin 110 and the lens barrel LB can be coupled to each other by the bonding portion BD.

The adhesive for bonding the bobbin 110 and the lens barrel LB can be detached from the lens barrel LB after being cured and receiving an impact from the outside.

For example, when the cured adhesive is subjected to an external impact, a crack may partially occur in the adhesive. Continuous use of the lens driving device may cause an external impact to be continuously and continuously applied to the cured adhesive.

Cracks generated in the adhesive due to a continuous external impact may grow and eventually the adhesive may be separated from the bonding area between the bobbin 110 and the lens barrel LB.

When the adhesive agent falls off, debris of the adhesive agent that has fallen off may flow into each part of the lens driving apparatus and damage the lens driving apparatus.

A bigger problem is that the adhesive may fall off and the lens barrel LB may be detached from the bobbin 110 and eventually be broken to such an extent that the lens driving device can not operate.

In order to prevent the occurrence of such a problem, it is necessary to strengthen the adhesive force so that the adhesive does not fall off even under continuous external shock.

In an embodiment, a coating extension region may be formed in the bobbin 110 to enhance adhesion of the adhesive bonding the bobbin 110 and the lens barrel LB to the bobbin 110. As described above, the topcoating extended region can serve to expand the application area of the adhesive.

When the same adhesive agent is used, the adhesive force of the adhesive agent may increase in proportion to the application area of the adhesive agent. Accordingly, the application extension region may be formed of, for example, an inclined surface 710.

5 and 6, the coating extension region may include an inclined surface 710 having an inclination with respect to the first direction on the inner circumferential surface of the bobbin 110. As shown in FIG. At this time, the inclined surface 710 may be formed in a ring shape as a whole along the inner circumference of the bobbin 110.

5, the inclined surface 710 may be disposed so as to surround the lens barrel LB on an x-y plane perpendicular to the first direction.

Most of the adhesive is applied to the upper end of the inner circumference of the bobbin 110, that is, the upper plane 720, and the gap between the inner circumferential surface of the bobbin 110 and the lens barrel LB The adhesive does not flow to the inner peripheral surface of the bobbin 110 through the gap.

As a result, most of the adhesive is adhered to the upper surface 720 of the bobbin 110 and the outer circumferential surface of the lens barrel LB, which are perpendicular to each other, and the cured adhesive has weak bonding force with respect to the bobbin 110 and lens barrel LB .

The adhesive is applied to the upper plane 720 and the sloped surface 710 of the bobbin 110 and to the lower surface of the lens barrel 710 corresponding to the height of the sloped surface 710 in the first direction, (LB).

Accordingly, the inclined surface 710 is formed on the bobbin 110, so that the upper surface 720 of the bobbin 110, the inclined surface 710, and the lens barrel 710 corresponding to the height of the inclined surface 710 in the first direction, Is applied to the outer circumferential surface of the slope surface LB and the slope surface 710 is not formed, the area of application can be significantly increased.

Due to the increase in the application area, the adhesive strength of the adhesive to the bobbin 110 and the lens barrel LB significantly increases, and the phenomenon that the adhesive is released by the external impact can be remarkably suppressed.

5 and 6, the coating extension region may include a plurality of depressed grooves 711 formed by a part of the inclined surface 710.

The recessed groove 711 is partially formed on the inclined surface 710 and the rest is recessed by the upper surface 720 of the bobbin 110 so that the inclined surface 710 and the upper surface 720 720).

When the adhesive is applied to the upper plane 720 and the slope 710, an adhesive may flow into the recesses 711 to increase the application area of the adhesive on the bobbin 110 side. As the area of application on the bobbin 110 side increases due to the depression grooves 711, the bonding force of the adhesive on the bobbin 110 side can be increased.

The plurality of depressed grooves 711 may be provided symmetrically with respect to the center of the bobbin 110, for example, and may be spaced apart from each other by a predetermined distance. The size of the depression grooves 711, the spacing between the depression grooves 711, and the like can be appropriately selected in consideration of the overall structure, size, bonding force required for the adhesive, and the like.

7 is a plan view showing a lens driving apparatus according to an embodiment. 8 is a cross-sectional view showing a lens driving apparatus according to an embodiment. 9 is an enlarged view showing a portion B in Fig.

7, when the lens barrel LB is inserted into the inner periphery of the bobbin 110, the inclined plane 710, the upper plane 720 and the plurality of recessed grooves 711 are formed in the lens barrel LB, As shown in FIG.

The adhesive is applied and cured on the inclined surface 710, the upper flat surface 720 and the plurality of recessed grooves 711 and the outer peripheral surface portion of the lens barrel LB corresponding to the inclined surface 710, the upper flat surface 720, and the lens barrel LB, 110 may be coupled to each other.

9, the adhesive is adhered to the lens barrel LB and the bobbin 110 to be hardened, thereby forming a bonding part BD for bonding the lens barrel LB and the bobbin 110 to each other .

At this time, as the adhesive forming the bonding part (BD), for example, an ultraviolet curing adhesive, an epoxy, a thermosetting adhesive or the like may be used.

One side of the bonding portion BD may be bonded to the inclined surface 710, the upper surface 720 and the recessed groove 711 of the bobbin 110 side and the other side may be bonded to the outer circumferential surface of the adhesive.

Particularly, since the inclined surface 710 is formed on the bobbin 110, the bonding portion BD is easily bonded to the outer peripheral surface of the lens barrel LB corresponding to the height of the inclined surface 710 in the first direction .

That is, the inclined surface 710 extends not only on the bobbin 110 but also on the outer circumferential surface of the lens barrel LB, so that the inclined surface 710 is formed on the outer peripheral surface of the lens barrel LB of the bonding portion BD formed by the adhesive The adhesion area can be widened.

The bonding area of the bonding part BD on the outer surface of the lens barrel LB is widened so that the bonding force of the bonding part BD with respect to the lens barrel LB can be remarkably increased.

10 is a perspective view of a bobbin 110 for explaining a coating extension region of another embodiment. 11 is an enlarged view showing part C of Fig.

As shown in FIGS. 10 and 11, the coating extension region may include a plurality of bosses 712 formed by protruding from the inclined surface 710 in part.

At this time, the boss 712 is partially formed on the inclined surface 710 and the rest is recessed by the upper surface 720 of the bobbin 110, so that the inclined surface 710 and the upper surface 720 As shown in Fig.

The boss 712 can increase the application area of the adhesive, like the recessed groove 711. That is, when the adhesive is applied to the upper plane 720 and the slope 710, an adhesive may be applied to the surface of the boss 712 to increase the application area of the adhesive on the bobbin 110 side.

As the coated area of the bobbin 110 on the bobbin 110 increases due to the boss 712 formed on the adhesive application region of the bobbin 110, the binding force of the adhesive on the bobbin 110 side may increase.

Meanwhile, the plurality of bosses 712 may be provided symmetrically with respect to the center of the bobbin 110, for example, and may be spaced apart from each other by a predetermined distance. The size of the boss 712, the spacing between the bosses 712, and the like can be appropriately selected in consideration of the overall structure, size, bonding force required for the adhesive, and the like.

12 is a perspective view of a bobbin 110 for explaining a coating extension region of another embodiment. 13 is an enlarged view showing part D of Fig.

As shown in FIGS. 12 and 13, the coating extension region may include a step 713 formed on the inclined surface 710. The stepped portions 713 may be provided in plural in the width direction of the inclined surface 710, for example.

Like the depression grooves 711 or the bosses 712, the plurality of steps 713 can increase the area of application of the adhesive agent to the bosses 712.

That is, when the adhesive is applied to the inclined surface 710 on which the step 713 is formed, an adhesive is applied to the vertical surface and the horizontal surface of the stepped portion 713 to increase the application area of the adhesive on the bobbin 110 side have.

As described above, the step 713 may be provided in plural in the width direction of the inclined surface 710, and the number and the width of the stepped portions 713 may be varied depending on the overall structure, size, And the like.

The coating extension area forms the inclined surface 710 and the inclined surface 710 can expand the application area of the adhesive on both the bobbin 110 side and the lens barrel LB side, It is possible to increase the bonding force of the adhesive for bonding the bobbin 110 and the lens barrel LB.

The coating extension region includes the recessed groove 711, the boss 712 or the step 713 to expand the application area of the adhesive together with the inclined surface 710 to cover the bobbin 110 and the lens barrel LB ) Can be increased.

In addition, by increasing the bonding force of the adhesive, even when the lens driving device receives continuous and continuous impact from the outside, the adhesive maintains the bonding force and is prevented from falling off, and the occurrence of failure of the lens driving device can be suppressed.

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 LB coupled to the bobbin 110, and an image sensor (not shown). At this time, the lens barrel LB may include at least one lens that transmits an image to the image sensor.

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. 2A, 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 holder member can support the lower side of the base 210.

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. Further, if the lens driving apparatus includes a separate substrate, there may be no separate terminal member.

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.

14 is a perspective view of the portable device 200A of one embodiment. Fig. 15 shows a configuration diagram of the portable device 200A shown in Fig.

14 and 15, a portable device 200A (hereinafter referred to as a "device") includes a body 850, a wireless communication unit 710, an A / V input unit 720, a sensing unit 740, An output unit 750, a memory unit 760, an interface unit 770, a control unit 780, and a power supply unit 790.

Various electronic components of the device can be embedded in the space formed between the front case 851 and the rear case 852 of the body 850.

The wireless communication unit 710 may be configured to include a broadcast receiving module 711, a mobile communication module 712, a wireless Internet module 713, a short range communication module 714 and a location information module 715, for example. have.

The A / V (Audio / Video) input unit 720 is for inputting an audio signal or a video signal and may include a camera 721 and a microphone 722.

The camera 721 may be a camera including the lens driving apparatus 100 according to the embodiment.

The sensing unit 740 senses the current state of the device 200A such as the open / closed state of the device 200A, the position of the device 200A, the presence of the user, the orientation of the device 200A, And generate a sensing signal for controlling the operation of the device 200A. In addition, it is responsible for a sensing function related to the power supply of the power supply unit 790, whether the interface unit 770 is connected to an external device, and the like.

The input / output unit 750 is for generating an input or an output related to a visual, auditory or tactile sense. The input / output unit 750 can generate input data for controlling the operation of the device 200A and can display information processed by the device 200A.

The input / output unit 750 may include a keypad unit 730, a display module 751, an audio output module 752, and a touch screen panel 753. [ The keypad unit 730 may generate input data by inputting a keypad.

The display module 751 may include a plurality of pixels whose color changes according to an electrical signal.

The audio output module 752 outputs audio data received from the wireless communication unit 710 in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, or a broadcast reception mode, Audio data can be output.

The touch screen panel 753 may convert a change in capacitance caused by a user's touch to a specific area of the touch screen into an electrical input signal.

The memory unit 760 may store a program for processing and controlling the control unit 780, input / output data, an image photographed by the camera 721, and the like.

The interface unit 770 receives data from an external device or supplies power to each component in the device 200A or allows data in the device 200A to be transmitted to an external device. The controller 780 may control the overall operation of the device 200A. The control unit 780 may include the panel control unit 144 of the touch screen panel driving unit shown in FIG. 1 or may perform the function of the panel control unit 144.

The control unit 780 may include a multimedia module 781 for multimedia playback. The control unit 780 can perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 790 can supply external power or internal power under the control of the controller 780 and supply power required for operation of each component.

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 the mutually incompatible technologies, and may be implemented in a new embodiment through the same.

110: Bobbin
120: first coil
130: first magnet
140: housing
150: upper elastic member
160: Lower elastic member
210: Base
220: Support member
230: second coil
231: Circuit member
250: printed circuit board

Claims (17)

A bobbin moving in a first direction;
A first coil installed on an outer circumferential surface of the bobbin;
A housing having the bobbin installed therein;
A first magnet coupled to the housing;
An upper elastic member provided on the bobbin and coupled to the bobbin and the housing;
A circuit member including a second coil disposed below the housing to face the first magnet;
A printed circuit board disposed below the circuit member and electrically connected to the circuit member; And
A plurality of support members connected to the upper elastic member,
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And a coating extension region for expanding the application area of the adhesive is formed on a portion of the bobbin to which the lens barrel is bonded. The method according to claim 1,
Wherein the coating extension region includes an inclined surface having an inclination with respect to the first direction on the inner peripheral surface of the bobbin. 3. The method of claim 2,
The inclined surface
And is arranged to surround the lens barrel on an xy plane perpendicular to the first direction. 3. The method of claim 2,
Wherein the coating extension region
And a plurality of depressed grooves formed by recessing a part of the inclined surface. 5. The method of claim 4,
The plurality of depressed-
Wherein the bobbin is provided symmetrically with respect to a center of the bobbin, and has a spacing interval set between the bobbins. 3. The method of claim 2,
Wherein the coating extension region
And a plurality of bosses protruding from the inclined surface. The method according to claim 6,
The plurality of bosses
Wherein the bobbin is provided symmetrically with respect to a center of the bobbin, and has a spacing interval set between the bobbins. 3. The method of claim 2,
Wherein the coating extension region
And a step formed on the inclined surface. 9. The method of claim 8,
The step difference,
And a plurality of lens groups are provided in the width direction of the inclined surfaces. The method according to claim 1,
And a lower elastic member provided below the bobbin and coupled to the bobbin and the housing. The method according to claim 1,
And a base disposed below the printed circuit board. The method according to claim 1,
Wherein the support member comprises:
And a lens disposed at a corner of the housing to elastically support the housing. 3. The method of claim 2,
Wherein the inclined surface is formed in a ring shape. housing;
A bobbin accommodated in the housing and for mounting the lens;
A first coil disposed on an outer circumferential surface of the bobbin;
A first magnet disposed on the side of the housing in correspondence with the first coil; And
And a base
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Wherein a coating extension region for expanding the application area of the adhesive is formed on a portion of the bobbin to which the lens is bonded. A bobbin moving in a first direction;
A first coil installed on an outer circumferential surface of the bobbin;
A housing having the bobbin installed therein;
A first magnet coupled to the housing;
An upper elastic member provided on the bobbin and coupled to the bobbin and the housing;
A lower elastic member provided below the bobbin and coupled to the bobbin and the housing;
A circuit member including a second coil disposed below the housing to face the first magnet;
A printed circuit board disposed below the circuit member and electrically connected to the circuit member;
A base disposed below the printed circuit board;
A plurality of support members connected to the upper elastic member; And
A lens barrel
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The bobbin
A coating extension region for expanding the application area of the adhesive is formed on a portion to be bonded to the lens barrel,
Wherein the coating extension region
And an inclined surface having an inclination with respect to the first direction on the inner peripheral surface of the bobbin,
And a plurality of recessed grooves, bosses, or steps are formed on the inclined surface. A camera module comprising the lens driving device according to any one of claims 1 to 14. A display module including a plurality of pixels whose color changes by an electrical signal;
The camera module according to claim 16, wherein the camera module converts the image input through the lens into an electrical signal; And
A controller for controlling operations of the display module and the camera module,
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