KR20180044558A - 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 and having threads coupled with a lens barrel on the inner peripheral surface thereof; a first coil installed on the outer peripheral 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. At least two grooves may be formed on the upper surface of the bobbin. It is possible to suppress the deformation and breakage of components in an assembly process.

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 may perform auto focusing to adjust the focal length of the lens by adjusting the distance between the image sensor (not shown) and the lens.

At this time, the image sensor may be mounted so as to be opposed to the substrate, for example, in the lower part of the lens driving device in the direction of the optical axis.

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 structure capable of suppressing deformation and breakage of parts during assembly, a camera module including the same, 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 and having a threaded engagement with a lens barrel on an inner peripheral surface thereof; 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 at least two grooves are formed on the upper surface of the bobbin.

One embodiment of the lens driving device may be to suppress the rotation of the bobbin when the lens barrel is engaged with the bobbin using the groove.

The groove may be recessed from the upper surface of the bobbin to the inside of the bobbin.

The plurality of grooves may be arranged to be symmetrical with respect to the center of the bobbin.

Two grooves may be formed on the upper surface of the bobbin, and the grooves may be disposed symmetrically with respect to the center of the bobbin.

The groove may be disposed at a position corresponding to a corner of the housing in which the support member is disposed.

The grooves may be arranged on a diagonal line connecting the corner portions of the housing.

One embodiment of the lens driving device may further include a cover member for accommodating the bobbin, and the cover member may be formed with an escape groove at a portion corresponding to the groove.

The cover member may have a penetrating portion corresponding to the inner circumference of the bobbin, and the escape groove may be formed by recessing the penetrating portion.

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.

Another embodiment of the lens driving device includes: a bobbin moving in a first direction and having a threaded engagement with a lens barrel on an inner peripheral surface thereof; 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; And a plurality of support members connected to the upper elastic member, wherein at least two grooves are formed on the upper surface of the bobbin.

One 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 the embodiment, when the lens barrel is rotated to couple the lens barrel to the bobbin, the groove is formed in the bobbin, and the rotation restraining means is coupled to the groove, so that the rotation of the bobbin due to friction between the lens barrel and the bobbin It can be suppressed effectively.

By suppressing the rotation of the bobbin, it is possible to remarkably reduce the occurrence of breakage due to friction between the bobbin and the housing on the contact portion between the bobbin and the housing, and breakage of the bobbin and the housing.

By suppressing the rotation of the bobbin, deformation of the upper elastic member, the lower elastic member, the support member, and the like coupled to the bobbin and the housing can be effectively suppressed.

1 is a perspective view schematically showing a lens driving apparatus of one embodiment.
2 is an exploded perspective view showing a lens driving apparatus of one embodiment.
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 cross-sectional perspective view showing a lens driving device of one embodiment.
6 is a front view of Fig. 5. Fig.
7 is a cross-sectional perspective view showing a part of the configuration of Fig.
8 is a front view of Fig.
9 is a plan view showing a lens driving apparatus according to an embodiment.
10 is a perspective view of a portable device of one embodiment.
Fig. 11 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. 2 is an exploded perspective view showing a lens driving apparatus of one 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. 2, 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. 8) 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 bobbin 110 and the lens barrel LB are coupled by the above-described screw coupling method will be described. Therefore, in the bobbin of the embodiment, a thread for screwing the lens barrel LB to the inner peripheral surface can be formed.

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. 2, 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. 2, 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, .

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 showing the housing 140 of 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 (see FIG. 3) 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 through hole 147 may be formed in the corner of the housing 140. The support member 220 may be connected to the upper elastic member 150 through the second through hole 147 in a first direction.

In the embodiment, four supporting members 220 are disposed at the corners of the housing 140, so that the second through holes 147 are also supported at the positions corresponding to the supporting members 220 Which are the same number as the number of the members 220. [ Of course, if the number of the support members 220 varies, the number of the second through holes 147 may also vary.

In another embodiment, a corner portion of the housing 140 may be formed with a depression through which the support member 220 passes, instead of the second through hole 147. As described above, the number of the depressions may vary according to the number of the support members 220.

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 cross-sectional perspective view showing a lens driving device of one embodiment. 6 is a front view of Fig. 5. Fig. As shown in FIGS. 5 and 6, the groove 700 may be formed in the bobbin 110 in the embodiment.

In the groove 700, when the lens barrel LB is coupled to the bobbin 110, the rotation restraining means 10 may be combined to suppress the rotation of the bobbin 110 of the lens barrel LB. The lens barrel LB may be coupled to the bobbin 110 in a screw-engagement manner in the lens driving apparatus of the embodiment.

That is, the bobbin 110 has an inner circumferential surface formed with threads SC to which the lens barrel LB is screwed, and an outer circumferential surface of the lens barrel LB is formed with threads SC formed on the bobbin 110 A thread can be formed.

The lens barrel LB is rotated to couple the lens barrel LB to the thread SC of the bobbin 110. At this time, due to the frictional force acting between the lens barrel LB and the bobbin 110, 110 can rotate.

When the bobbin 110 rotates, a pressing force may be applied to a portion where the bobbin 110 and the housing 140 are in contact with each other. This pressing force may cause a frictional phenomenon between the bobbin 110 and the housing 140 due to friction on the contact portion between the bobbin 110 and the housing 140 and may severely damage the bobbin 110 and the housing 140.

When the bobbin 110 and the housing 140 are rotated, the upper elastic member 150 and the lower elastic member 160, which are engaged with the bobbin 110 and the housing 140, The support member 220, etc. may be deformed, resulting in breakage or plastic deformation, resulting in failure of the lens driving device.

Therefore, when the lens barrel LB is rotated to screw the lens barrel LB to the bobbin 110, the rotation of the bobbin 110 is suppressed to prevent the bobbin 110, the housing 140, The lower elastic member 160, the support member 220, and the like.

In order to suppress the rotation of the bobbin 110 when the lens barrel LB is engaged, the rotation restraining means 10 may be used. The rotation restraining means 10 may be, for example, a jig provided in an external lens driving device assembling apparatus.

When the lens barrel LB is coupled to the bobbin 110 while the rotation suppressing means 10 is holding the bobbin 110, the rotation restraining means 10 rotates the bobbin 110 The rotation of the bobbin 110 can be suppressed even when the lens barrel LB is rotated to screw the bobbin 110 to the lens barrel LB.

The rotation restraining means 10 is coupled to the bobbin 110 to hold the bobbin 110 and when rotation of the lens barrel LB is completed, It is necessary to have a structure capable of easily separating from the substrate.

The structure in which the rotation restraining means 10 is easily detachable to the bobbin 110 is a defect groove formed in the bobbin 110. [ That is, when the lens barrel LB rotates to engage with the bobbin 110 by forming the groove 700 in the bobbin 110, the rotation restraining unit 10 may rotate the groove 700, The rotation of the bobbin 110 can be suppressed.

5 and 6, the groove 700 may be recessed from the upper surface of the bobbin 110 to the inside of the bobbin 110, for example. On the other hand, it is appropriate that the grooves 700 are provided in two or more.

When the groove 700 is provided and one rotation inhibiting means 10 is coupled to the groove 700 and the lens barrel LB is engaged with the groove 700, The bobbin 110 can be rotated.

Therefore, in order to more reliably and reliably suppress the rotation of the bobbin 110, two or more grooves 700 are provided, and two or more rotation restraining means 10 are provided in the grooves 700 It is necessary to hold the bobbin 110 in combination.

The plurality of grooves 700 may be arranged to be symmetrical with respect to the center of the bobbin 110, respectively. It is appropriate to hold the bobbin 110 at positions symmetrical with respect to the bobbin 110 in order to reliably and stably suppress the rotation of the bobbin 110. [

Therefore, in order to hold the bobbin 110 by the rotation restraining means 10 at positions mutually symmetrical with respect to the bobbin 110, the plurality of grooves 700 are positioned at positions corresponding to the bobbin 110 Are symmetrical to each other with respect to the center of the light-shielding film.

In addition, two grooves 700 may be formed on the upper surface of the bobbin 110, and they may be arranged to be symmetrical with respect to the center of the bobbin 110, respectively.

If three or more grooves 700 are formed, the number of grooves 700 that become empty spaces in the bobbin 110 increases, so that the mechanical strength of the bobbin 110 is reduced, .

In addition, since the lens driving apparatus of the embodiment is a very small apparatus, it may be difficult to secure a space for forming a large number of grooves 700 in the bobbin 110. [

When the lens barrel LB is engaged after the cover member 300 is assembled in the lens driving apparatus of the embodiment, the rotation restraining means 10 is provided on the cover member 300 at a position corresponding to the groove 700 Through holes or escapes must be formed.

In this case, the portion exposed to the outside due to the formation of the through hole or the escape portion in the cover member 300 may increase.

External foreign matter may be introduced into the lens driving apparatus through the exposed portion, and foreign foreign substances may deteriorate the performance of the lens driving apparatus. Therefore, it may be appropriate to minimize the formation of the through hole or the escape portion in the cover member 300. [

For the above reason, it is necessary to reliably and stably suppress the rotation of the bobbin 110 and to minimize the number of the grooves 700. When the number of the grooves 700 is satisfied, .

The two grooves 700 may be arranged to be symmetrical with respect to the center of the bobbin 110, respectively, for the reasons described above.

A groove 700 is formed in the bobbin 110 and the rotation restraining means 10 is coupled to the groove 700. In order to couple the lens barrel LB to the bobbin 110, The rotation of the bobbin 110 due to the friction between the lens barrel LB and the bobbin 110 can be effectively suppressed.

The rotation of the bobbin 110 is suppressed and the bending of the bobbin 110 and the housing 140 due to the friction between the bobbin 110 and the housing 140 and the breakage of the bobbin 110 and the housing 140 Occurrence can be remarkably reduced.

By suppressing the rotation of the bobbin 110, deformation of the upper elastic member 150, the lower elastic member 160, and the support member 220 coupled to the bobbin 110 and the housing 140 can be effectively suppressed have.

7 is a cross-sectional perspective view showing a part of the configuration of Fig. 8 is a front view of Fig. 7 and 8, a plurality of the grooves 700 are provided, and each of the grooves 700 is positioned at a position corresponding to the corner of the housing 140 where the support member 220 is disposed, As shown in FIG.

When the bobbin 110 and the housing 140 rotate, the support member 220 disposed at the corner of the housing 140 is highly likely to undergo plastic deformation.

Therefore, when the operation of screwing the lens barrel LB to the bobbin 110 proceeds, it is necessary to more reliably suppress plastic deformation of the support member 220 due to rotation of the bobbin 110. [

When the bobbin 110 and the housing 140 are rotated, the portion having the smallest rotation angle is the groove 700 to which the rotation suppressing means 10 is coupled.

Therefore, since the groove 700 is disposed adjacent to the support member 220, the rotation angle is small even when the bobbin 110 and the housing 140 are rotated, thereby effectively suppressing the plastic deformation of the support member 220 .

Therefore, in order to effectively suppress the plastic deformation of the support member 220, it may be appropriate that the groove 700 is disposed at a position corresponding to the corner of the housing 140.

In other words, the housing 140 may have a generally rectangular shape, and the groove 700 may be disposed on a diagonal line connecting each corner of the housing 140, that is, each corner.

Due to this structure, the support member 220 and the rotation restraining means 10 are disposed adjacent to each other, and rotation of the bobbin 110 and the housing 140 is minimized by the rotation restraining means 10, The plastic deformation of the support member 220 can be effectively suppressed.

Referring to Fig. 8, the engagement operation of the lens barrel LB is, for example, as follows. First, the housing 140 provided with the bobbin 110 is disposed on the work table of a lens driving device assembling apparatus (not shown).

At this time, the lens barrel LB may be assembled after the cover member 300 is assembled, or the cover member 300 may be assembled after the lens barrel LB is coupled.

Next, the end of the rotation restraining means 10 is inserted into the groove 700, and the bobbin 110 is gripped. Of course, the rotation restraining means 10 serves to suppress the rotation of the bobbin 110.

Next, the lens barrel LB is coupled to the thread SC formed on the inner circumferential surface of the bobbin 110. At this time, the lens barrel LB is rotated to engage with the thread SC of the bobbin 110.

At this time, the rotation restraining means 10 can suppress the rotation of the bobbin 110 due to the friction between the lens barrel LB and the bobbin 110.

Next, when the threaded engagement of the lens barrel LB with the bobbin 110 is completed, the rotation restraining means 10 is released from the groove 700 and the bobbin 110. Therefore, as shown in FIG. 8, the rotation restraining means 10 may be provided so as to be movable up and down.

9 is a plan view showing a lens driving apparatus according to an embodiment. The cover member 300 covers the bobbin 110 and can accommodate the bobbin 110 and an escape groove 340 is formed at a portion corresponding to the groove 700 as shown in FIG. .

Specifically, the cover member 300 is formed with a penetration portion 330 corresponding to the inner circumference of the bobbin 110, and the escape groove 340 may be formed by recessing the penetration portion 330.

Referring to FIG. 7, since the bobbin 110 is provided to move in the first direction with respect to the housing 140, in order to smoothly move in the first direction, it may be appropriate to reduce the sectional area of the bobbin 110 as viewed in the first direction.

9, the recessed groove may be disposed adjacent to the penetration portion 330 formed at the center of the cover member 300, and the recessed groove may be formed in the recessed groove 330, The through hole 330 may be recessed in the xy plane at a portion corresponding to the groove 700. [

Meanwhile, external foreign substances can be introduced into the lens driving apparatus through the penetration part 330 including the recessed groove. In order to suppress the inflow of foreign foreign substances, for example, the penetration part 330 It can be applied with an adhesive.

In another embodiment, a cover (not shown) capable of restraining the inflow of foreign matter may be disposed in the front portion of the lens driving apparatus.

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. 2, an infrared cutoff filter may be installed at a position corresponding to the image sensor, and may be combined with a holder member (not shown). Further, the 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.

10 is a perspective view of the portable device 200A of one embodiment. Fig. 11 shows a configuration diagram of the portable device 200A shown in Fig.

10 and 11, 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.

10:
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
300: cover member

Claims (15)

A bobbin that moves in a first direction and has a threaded engagement with a lens barrel on an inner peripheral surface thereof;
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,
Lt; / RTI >
And at least two grooves are formed on the upper surface of the bobbin. The method according to claim 1,
And wherein when the lens barrel is engaged with the bobbin using the groove, rotation of the bobbin is suppressed. The method according to claim 1,
The groove
Wherein the bobbin is formed by being recessed from the upper surface of the bobbin to the inside of the bobbin. The method according to claim 1,
The groove
Wherein the plurality of bobbins are arranged symmetrically with respect to the center of the bobbin. The method according to claim 1,
The groove
Wherein two bobbins are formed on the upper surface of the bobbin and are arranged to be symmetrical with respect to the center of the bobbin, respectively. The method according to claim 1,
The groove
Wherein the lens holder is disposed at a position corresponding to a corner of the housing in which the support member is disposed. The method according to claim 6,
The groove
And the lens is disposed on a diagonal line connecting the corner portions of the housing. The method according to claim 1,
Further comprising a cover member for receiving the bobbin,
The cover member
And an escape groove is formed in a portion corresponding to the groove. 9. The method of claim 8,
Wherein the cover member is formed with a penetrating portion corresponding to the inner periphery of the bobbin, and the escape groove is formed by recessing the penetrating portion. 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. A bobbin that moves in a first direction and has a threaded engagement with a lens barrel on an inner peripheral surface thereof;
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; And
A plurality of support members connected to the upper elastic member,
Lt; / RTI >
And at least two grooves are formed on the upper surface of the bobbin. A camera module comprising the lens driving device according to any one of claims 1 to 13. A display module including a plurality of pixels whose color changes by an electrical signal;
The camera module according to claim 14, 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,
≪ / RTI >

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