KR20240041312A - Lens driving unit and camera module including the same - Google Patents

Abstract

The embodiment includes a housing, a bobbin disposed in the housing and movable in a first direction, an upper elastic member located on the bobbin and coupled to the bobbin and the housing, a lower elastic member located below the bobbin and coupled to the bobbin and the housing, and an upper elastic member. A support member including one end coupled to the housing and supporting the housing to be movable in a second direction perpendicular to the first direction or a third direction perpendicular to the first and second directions, and a damping portion coupled to the support member and the housing. and the housing includes a first region coupled to the upper elastic member, a second region coupled to the lower elastic member, and a third region coupled to the damping portion, and the third region is located in a second region greater than the first region. It is located close by.

Description

Lens driving unit and camera module including the same}

The embodiment relates to a lens driving device and a camera module including the same.

The content described in this section simply provides background information on embodiments and does not constitute prior art.

Recently, the development of IT products such as mobile phones, smartphones, tablet PCs, and laptops with built-in ultra-small digital cameras is actively underway.

In the case of camera modules mounted on small electronic products such as smartphones, the camera module may be frequently impacted during use, and the camera module may be slightly shaken due to the user's hand shaking while filming. In consideration of this, there has recently been a demand for the development of technology for additionally installing a camera module to compensate for hand shake.

In order to further improve such camera shake correction means, structural improvement of the lens driving device that aligns the optical axis focal length of the lens in the camera module or performs the camera shake correction function is required.

In particular, if tilt occurs when the lens driving device performs image stabilization, it may interfere with the lens driving device's auto focusing and image stabilization, and may deteriorate the quality of captured images, so improvement is required.

Accordingly, the embodiment relates to a lens driving device having a structure capable of suppressing excessive tilt of some components when performing hand shake correction and a camera module including the same.

The technical challenges sought to be achieved by the embodiments are not limited to the technical challenges mentioned above, and other technical challenges not mentioned may be clearly understood by those skilled in the art from the description below.

A lens driving device according to an embodiment includes a housing; a bobbin disposed within the housing and movable in a first direction; an upper elastic member located on the bobbin and coupled to the bobbin and the housing; a lower elastic member located below the bobbin and coupled to the bobbin and the housing; a support member including an end coupled to the upper elastic member and supporting the housing to be movable in a second direction perpendicular to the first direction or a third direction perpendicular to the first and second directions; and a damping portion coupled to the support member and the housing, wherein the housing includes a first region coupled to the upper elastic member, a second region coupled to the lower elastic member, and a third region coupled to the damping portion. It includes, and the third area is located closer to the second area than the first area. The damping portion may be spaced apart from the upper elastic member and the one end of the support member. The third area of the housing may correspond to a corner area of the housing.

The damping portion may include at least one of epoxy, thermosetting adhesive, or photocuring adhesive.

The damping portion may be located lower than the upper elastic member and higher than the lower elastic member. The support member and the upper elastic member may be electrically connected to each other using a conductive adhesive.

The lens driving device includes a magnet disposed in the housing; and a first coil disposed on the bobbin and moving the bobbin in the first direction by interacting with the magnet.

The lens driving device may include a second coil disposed below the magnet and moving the housing in the second direction or the third direction by interaction with the magnet. The lens driving device includes a circuit board disposed below the housing; And it may include a base disposed below the circuit board. The support member may be in the form of a wire. The second coil may be electrically connected to the circuit board. The circuit board may include a top surface disposed on the base, a terminal surface bent from the top surface of the circuit board, and terminals formed on the terminal surface.

Current may be applied to the first coil through the upper elastic member and the support member. The damping unit may be located closer to the lower elastic member than to the upper elastic member.

A lens driving device according to another embodiment includes a housing; a bobbin disposed within the housing; A magnet disposed in the housing; a first coil disposed on the bobbin and moving the bobbin in a first direction by interaction with the magnet; an upper elastic member disposed on the bobbin and coupled to the bobbin and the housing; a lower elastic member disposed below the bobbin and coupled to the bobbin and the housing; a support member including one end coupled to the upper elastic member and supporting the housing; and a second coil that moves the housing in a second direction perpendicular to the first direction or a third direction perpendicular to the first and second directions by interacting with the magnet. and a damping portion coupled to the support member and the housing, wherein the housing includes a first region coupled to the upper elastic member, a second region coupled to the lower elastic member, and a third region coupled to the damping portion. It includes, and the distance between the second area and the third area is smaller than the distance between the first area and the third area. The damping portion may be spaced apart from the upper elastic member and the one end of the support member. The third area of the housing may correspond to a corner area of the housing.

In an embodiment, the support member may suppress tilt of the housing and the bobbin by providing a first fixing part fixed to a lower side of the housing.

In addition, the first fixing part reduces the length of the central axis of the support member in the first direction, thereby suppressing tilt of the housing and bobbin.

In addition, there is an effect of improving tilt defects when performing camera shake correction of a lens driving device, thereby reducing product defects.

In addition, in the embodiment, by using a plate-shaped support member with a structure that allows adjustment of the spring constant, tilt defects are improved and the distance between each fixing point of the support member is shortened, so that the spring constant is strengthened by appropriately adjusting the lens. This has the effect of smoothly performing camera shake correction of the driving device.

Figure 1 is a perspective view showing a lens driving device according to an embodiment.
Figure 2 is an exploded perspective view showing a lens driving device according to an embodiment.
Figure 3 is a front view showing a support member according to one embodiment.
Figure 4 is a front view showing a portion of a lens driving device equipped with a support member according to an embodiment.
Figure 5 is a perspective view showing a portion of a lens driving device equipped with a support member according to an embodiment.
Figure 6 is a front view showing a support member according to another embodiment.
Figure 7 is a front view showing a portion of a lens driving device equipped with a support member according to another embodiment.
Figure 8 is a front view showing a portion of a lens driving device according to an embodiment.

Hereinafter, an embodiment will be described in detail with reference to the attached drawings. Since the embodiments can be subject to various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiment to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the embodiment. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Terms such as “first”, “second”, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. Additionally, terms specifically defined in consideration of the configuration and operation of the embodiment are only for explaining the embodiment and do not limit the scope of the embodiment.

In the description of the embodiment, in the case where each element is described as being formed "on or under", ) includes two elements that are in direct contact with each other or one or more other elements that are formed (indirectly) between the two elements. Additionally, when expressed as “up” or “on or under,” it can include not only the upward direction but also the downward direction based on one element.

In addition, relational terms such as "top/top/top" and "bottom/bottom/bottom" used below do not necessarily require or imply any physical or logical relationship or order between such entities or elements, It may be used only to distinguish one entity or element from another entity or element.

Additionally, a rectangular coordinate system (x, y, z) can be used in the drawing. In the drawing, the x-axis and y-axis refer to axes perpendicular to the optical axis. For convenience, the optical axis direction (z-axis direction) may be referred to as the first direction, the x-axis direction may be referred to as the second direction, and the y-axis direction may be referred to as the third direction.

Figure 1 is a perspective view showing a lens driving device according to an embodiment. Figure 2 is an exploded perspective view showing a lens driving device according to an embodiment.

An image stabilization device applied to small camera modules of mobile devices such as smartphones or tablet PCs is used to prevent the outline of the captured image from being formed clearly due to vibration caused by the user's hand shaking when shooting still images. It means a configured device. Additionally, the auto focusing device is a device that automatically focuses the image of the subject onto the image sensor (not shown).

Such hand shake correction devices and auto focusing devices can be configured in various ways. In the embodiment, the optical module composed of a plurality of lenses is moved in the first direction or moved against a plane perpendicular to the first direction to prevent hand shake. Compensation operations and/or auto-focusing operations may be performed.

As shown in FIG. 2, the lens driving device according to the embodiment may include a movable part. At this time, the movable part may perform the functions of auto-focusing and image stabilization of the lens. The movable part may include a bobbin 110, a first coil 120, a first magnet 130, a housing 140, an upper elastic member 150, and a lower elastic member 160.

The bobbin 110 is provided with a first coil 120 disposed inside the first magnet 130 on its outer peripheral surface, and is subject to electromagnetic interaction between the first magnet 130 and the first coil 120. It can be installed in the internal space of the housing 140 to be movable back and forth in the first direction. A first coil 120 may be installed on the outer peripheral surface of the bobbin 110 to enable electromagnetic interaction with the first magnet 130.

In addition, the bobbin 110 is elastically supported by the upper and lower elastic members 150 and 160, and can move in the first direction to perform an auto-focusing function.

The bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed. The lens barrel can be coupled to the inside of the bobbin 110 in various ways.

For example, a female thread may be formed on the inner peripheral surface of the bobbin 110, and a male thread corresponding to the thread may be formed on the outer peripheral surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screwing them together.

However, this is not limited, and the lens barrel may be directly fixed to the inside of the bobbin 110 using a method other than screwing, without forming a thread on the inner peripheral surface of the bobbin 110. Alternatively, it is also possible for the one or more lenses to be formed integrally with the bobbin 110 without a lens barrel.

The lens coupled to the lens barrel may be composed of one piece, or two or more lenses may be configured to form an optical system.

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

A plurality of upper and lower support protrusions may be formed to protrude on the upper and lower surfaces of the bobbin 110. The upper support protrusion may be provided in a cylindrical or prismatic shape, and may couple and secure the upper elastic member 150. The lower support protrusion may be provided in a cylindrical or prismatic shape like the above-mentioned upper support protrusion, and may couple and secure the lower elastic member 160.

At this time, a through hole corresponding to the upper support protrusion may be formed in the upper elastic member 150, and a through hole corresponding to the lower support protrusion may be formed in the lower elastic member 160. Each of the supporting protrusions and the holes can be fixedly coupled to each other by an adhesive member such as heat fusion or epoxy.

The housing 140 has the shape of a hollow pillar supporting the first magnet 130 and may be formed in a substantially square shape. The first magnet 130 and the support member 220 may be combined and disposed on the side surface of the housing 140.

Additionally, as described above, a bobbin 110 that is guided by elastic members 150 and 160 and moves in the first direction may be disposed inside the housing 140. In an embodiment, the first magnet 130 may be placed at a corner of the housing 140, and a support member 220 may be placed on the side.

The upper elastic member 150 and the lower elastic member 160 may elastically support the upward and/or downward motion of the bobbin 110 in the first direction. The upper elastic member 150 and the lower elastic member 160 may be provided as leaf springs.

As shown in FIG. 2, the upper elastic member 150 may be provided as two separate pieces. Through this two-part structure, each divided part of the upper elastic member 150 can receive currents of different polarities or different power sources. Additionally, as a modified example, the lower elastic member 160 may be configured as a two-part structure, and the upper elastic member 150 may be configured as an integrated structure.

Meanwhile, the upper elastic member 150, lower elastic member 160, bobbin 110, and housing 140 may be assembled through heat fusion and/or bonding using an adhesive, etc. At this time, for example, the fixation work can be completed by bonding using an adhesive after heat fusion fixation.

The base 210 is disposed below the bobbin 110 and may be provided in a substantially square shape, on which the printed circuit board 250 may be seated, and the lower side of the support member 220 may be fixed.

Additionally, a support member 220 seating groove 214 into which the lower part of the support member 220 can be inserted may be formed concavely on the upper surface of the base 210. Adhesive may be applied to the seating groove 214 of the support member 220 to fix the support member 220 so that it does not move.

A support groove of a corresponding size may be formed on the surface of the base 210 facing the portion where the terminal surface 253 of the printed circuit board 250 is formed. This support groove is formed to be concave inward at a certain depth from the outer peripheral surface of the base 210, so that the portion where the terminal surface 253 is formed can be prevented from protruding outward or the amount of protrusion can be adjusted.

The support member 220 is disposed on the side of the housing 140, the upper side is coupled to the housing 140, and the lower side is coupled to the base 210, and the bobbin 110 and the housing 140 are connected to the housing 140. It can be supported to move in a second and third direction perpendicular to the first direction, and can also be electrically connected to the first coil 120.

Since the support members 220 according to the embodiment are each disposed on the outer surface of the square of the housing 140, a total of four support members 220 can be installed symmetrically. However, this is not limited, and it is also possible to consist of 8 pieces, 2 for each straight side.

Additionally, the support member 220 may be electrically connected to the upper elastic member 150 or may be electrically connected to a straight surface of the upper elastic member 150.

In addition, since the support member 220 is formed as a separate member from the upper elastic member 150, the support member 220 and the upper elastic member 150 can be electrically connected through conductive adhesive, soldering, etc. Accordingly, the upper elastic member 150 can apply current to the first coil 120 through the electrically connected support member 220.

The support member 220 of the embodiment may include a first fixing part 221 (see FIG. 3) on a lower side of the housing that can secure the support member 220 to the housing. In the lens driving device including the first fixing part 221, tilt of the bobbin 110 and/or housing 140 may be suppressed when performing hand shake correction. The specific structure of the support member 220 will be described below with reference to FIG. 3 and the like.

Meanwhile, in FIG. 2, the plate-shaped support member 220 is shown as an example, but the present invention is not limited thereto. That is, the support member may be provided in the form of a wire.

The second coil 230 may perform hand shake correction by moving the housing 140 in the second and/or third directions through electromagnetic interaction with the first magnet 130.

Here, the second and third directions may include directions substantially close to the x-axis and y-axis directions as well as the x-axis and y-axis directions. That is, from the driving aspect of the embodiment, the housing 140 may move parallel to the x-axis and y-axis, but may also move slightly inclined to the x-axis and y-axis when moved while supported by the support member 220. there is.

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

The second coil 230 may be arranged to face the first magnet 130 fixed to the housing 140. In one embodiment, the second coil 230 may be disposed outside the first magnet 130. Alternatively, the second coil 230 may be installed below the first magnet 130 at a certain distance apart.

According to the embodiment, a total of four second coils 230 may be installed at the four corners of the circuit member 231, but this is not limited, and one for the second direction and one for the third direction. It is possible for only two lights to be installed, or four or more.

In the case of an embodiment, a circuit pattern may be formed in the shape of a second coil 230 on the circuit member 231, and additionally, a separate second coil may be disposed on the circuit member 231, but the present invention is not limited to this, and the circuit Instead of forming a circuit pattern in the shape of the second coil 230 on the member 231, only a separate second coil 230 may be disposed on the circuit member 231.

Alternatively, it is also possible to configure the second coil 230 by winding a wire in a donut shape, or by forming the second coil 230 in the form of an FP coil and electrically connecting it to the printed circuit board 250.

The second coil 230 may be disposed above the base 210 and below the housing 140. At this time, the circuit member 231 including the second coil 230 may be installed on the upper surface of the printed circuit board 250 disposed on the upper side of the base 210.

However, this is not limited, and the second coil 230 may be placed in close contact with the base 210, or may be placed at a certain distance apart, and may be formed on a separate board and attached to the printed circuit board 250. Laminated connections are also possible.

The printed circuit board 250 is coupled to the upper surface of the base 210, and as shown in FIG. 2, a hole or groove is formed at a corresponding position so that the seating groove 214 of the support member 220 is exposed. can be formed.

A bent terminal surface 253 on which the terminal 251 is installed may be formed on the printed circuit board 250. In the embodiment, a printed circuit board 250 is shown having two bent terminal surfaces 253 formed thereon.

A plurality of terminals 251 are disposed on the terminal surface 253, and external power can be applied to supply current to the first coil 120 and the second coil. The number of terminals formed on the terminal surface 253 may increase or decrease depending on the types of components that require control. Additionally, the printed circuit board 250 may be provided with one or three or more terminal surfaces 253.

The cover member 300 may be provided in a substantially box shape, accommodate the above-described movable part, the second coil 230, a portion of the printed circuit board 250, etc., and may be coupled to the base 210.

The cover member 300 protects the movable part, the second coil 230, the printed circuit board 250, etc. accommodated therein from damage, and in particular, the first magnet 130 and the first magnet 130 accommodated therein. Leakage of electromagnetic fields generated by the coil 120, the second coil 230, etc. to the outside can be limited and the electromagnetic fields can be focused.

Figure 3 is a front view showing the support member 220 according to one embodiment. Figure 4 is a front view showing a portion of a lens driving device equipped with a support member 220 according to an embodiment. Figure 5 is a perspective view showing a portion of a lens driving device equipped with a support member 220 according to an embodiment.

In an embodiment, the support member 220 may be provided in a plate shape, the upper side is coupled to the upper side of the housing 140, a portion is fixed to the lower side of the housing 140, and the lower side is connected to the base 210. It may have a structure that binds to.

Specifically, the support member 220 may include a first fixing part 221, a first coupling part 222, a second coupling part 223, a first connecting part 224, and an elastic deformation part 225. You can. At this time, each component of the support member 220 may be formed integrally.

The first fixing part 221 is a part of the support member 220 that is fixed to the lower side of the housing 140, and when the lens driving device performs hand shake correction, the bobbin 110 and the housing 140 It can play a role in suppressing tilt.

When correcting hand shake, the bobbin 110 and the housing 140 not only move horizontally in the second and third directions perpendicular to the first direction, but may also perform a tilt movement that tilts in the first direction when moving horizontally.

If the bobbin 110 and the housing 140 are tilted, it may interfere with the lens driving device's auto-focusing and image stabilization and may deteriorate the quality of the captured image. Therefore, it is necessary to appropriately suppress the occurrence of tilt.

The magnitude of this tilt is proportional to the distance between the point where the support member 220 is fixed to the base 210 and the point where the housing 140 is fixed. Specifically, the tilt increases in proportion to the magnitude of the moment applied to the bobbin 110 and the housing 140, and the moment M can be expressed as follows.

M = F × L

Here, F refers to the force applied to the bobbin 110 and the housing 140, for example, the force applied by an electromagnetic field, and L refers to the point fixed to the base 210 in the support member 220 and the housing. It means the distance between the fixed points of (140).

Therefore, as the distance L becomes longer, the moment applied to the bobbin 110 and housing 140 increases, and as the moment increases, the bobbin 110 and housing 140 rotate with respect to the point fixed to the base 210. increases, and the tilt due to this rotation may also increase.

Therefore, as the distance L is reduced, the moment applied to the bobbin 110 and the housing 140 and the resulting tilt can also be reduced. Therefore, the tilt of the bobbin 110 and the housing 140 can be appropriately adjusted by appropriately adjusting the distance L. It can be adjusted.

Therefore, the support member 220 is provided with the first fixing part 221 fixed to the housing 140 between the first coupling part 222 and the second coupling part 223, so that the distance L can be reduced. , In order to further reduce the distance L, it may be appropriate for the first fixing part 221 to be fixed to the lower side of the housing 140.

In this case, the distance L may be the point where the support member 220 is fixed to the base 210, that is, the distance from the second coupling portion 223 below to the first fixing portion 221. Additionally, in order to ensure that the first fixing part 221 is fixed to the lower side of the housing 140, the support member 220 may have the following structure.

The first fixing part 221 is a part of the support member 220 that is fixed to the lower side of the housing 140, and may be provided at the bottom of the first connection part 224, which will be described below. At this time, the first fixing part 221 is integrally coupled with the first connection part 224 and the elastic deformation part 225 and serves to connect the first connection part 224 and the elastic deformation part 225 to each other. You can.

The first fixing part 221 may be fixed to the housing 140 by being bonded to the lower side of the housing 140 with adhesive. Adhesives used for bonding include epoxy, thermosetting adhesive, photocurable adhesive, and other various types of adhesives.

Additionally, the bonding may serve as a damping unit that cushions vibration occurring when the housing 140 and the bobbin 110 operate in the second and third directions.

Meanwhile, although not shown, the damping part that cushions the vibration of the housing 140 and the bobbin 110 may be provided in various forms other than bonding the first fixing part 221 to the housing 140. For example, it may be provided on a curved side of the housing 140, that is, at a corner, so as to be in contact with the base 210 to cushion the vibration of the housing 140 and the bobbin 110.

In addition, although not shown, the damping unit may be provided to be bonded to the housing 140 at an appropriate portion of the support member 220 so that this bonding serves as a damping unit if it does not interfere with the operation of the support member 220. It may be possible.

In an embodiment, a total of four support members 220 are provided, the support members 220 include one first fixing part 221, and each support member 220 is positioned at the center of the housing 140. It can be arranged radially with respect to. Accordingly, the lens driving device of the embodiment may be provided with a total of four first fixing parts 221.

The first coupling portion 222 is a portion coupled to the housing 140 on the upper side of the housing 140. As shown in FIG. 5, a protrusion opposing the first coupling portion 222 may be formed on the upper side of the housing 140 for coupling to the first coupling portion 222.

The first coupling part 222 and the protruding part are bonded by an adhesive or the like, so that the first coupling part 222 can be fixed or coupled to the protruding part of the housing 140. At this time, various types of adhesives such as epoxy, thermosetting adhesive, and photocurable adhesive can be used.

Since the first coupling portion 222 needs to have a surface area for bonding, it is appropriate to be formed in a plate shape with a constant width in the vertical and lateral directions, unlike the first connecting portion 224 or the elastic deformation portion 225. You can.

The second coupling portion 223 is a portion coupled to the base 210. As shown in FIG. 4, the second coupling portion 223 is seated in the seating groove 214 of the support member 220 formed on the upper surface of the base 210, and is bonded with an adhesive or the like to form the second coupling. Part 223 may be fixed or coupled to the base 210. Likewise, various types of adhesives such as epoxy, thermosetting adhesive, photocuring adhesive, etc. can be used.

Meanwhile, as shown in FIG. 4, the second coupling portions 223 may be provided as a pair symmetrical to each other in order to couple with the plurality of elastic deformation portions 225 arranged symmetrically, each The second coupling portion 223 of can be similarly fixed or coupled to the seating groove 214 of the support member 220, which is provided as a pair symmetrical to each other.

It is appropriate that the second coupling portion 223 be provided in a shape corresponding to the shape of the seating groove 214 of the supporting member 220 so that it can be seated in the seating groove 214 of the supporting member 220. That is, the seating groove 214 of the support member 220 may be formed to have various widths in the vertical direction so that the second coupling portion 223 does not easily separate, and accordingly, the shape of the second coupling portion may also be changed to the support member 220. ) It can be formed to correspond to the shape of the seating groove 214.

The first connection portion 224 may extend from the first coupling portion 222. At this time, one end, that is, the lower end, of the first connection part 224 may be coupled to the first fixing part 221. The first connection part 224 may serve to connect the first coupling part 222 and the first fixing part 221.

Accordingly, the upper end of the first connection part 224 is integrally coupled with the first coupling part 222, and the lower end of the first connection part 224 is integrally coupled with the first fixing part 221. It can be.

Since the first connecting portion 224 connects the first connecting portion 222 and the first fixing portion 221, as shown in FIGS. 3 and 4, the first connecting portion 224 has a narrow lateral width and a long vertical length. It may be appropriate to be provided in a bar shape.

*Elastic deformation portion 225 may extend from the second coupling portion 223. The elastic deformation part 225 is deformed when the bobbin 110 and the housing 140 move in the second or third direction, but has a restoring force and elastically elastically holds the bobbin 110 and the housing 140. It can play a supporting role.

When the housing 140 and the bobbin 110 move in the second and third directions perpendicular to the first direction, the elastic deformation portion 225 moves in the direction in which the housing 140 and the bobbin 110 move. That is, it can be elastically deformed in the lateral direction of the support member 220 and in the vertical direction of the support member 220.

Due to this structure, the housing 140 and the bobbin 110 can move in the second and third directions with almost no change in position in the first direction except for tilt, thereby improving the accuracy of hand shake correction. This uses a structure in which the elastic deformation portion 225 can be elastically deformed in the vertical direction of the support member 220.

As shown in FIGS. 3 and 4, the elastic deformation portion 225 has one end integrally coupled with the first fixing portion 221 and the other end integrally coupled with the second coupling portion 223. You can. At this time, the elastic deformation parts 225 may be provided as a pair symmetrical to each other.

In addition, the elastic deformation portion 225 extends upward from the first fixing portion 221 as a whole and then extends downward again to connect to the second coupling portion 223, and has a shape that is bent at least once in the lateral direction. You can.

Due to this structure, the elastic deformation part 225 elastically supports the movement of the housing 140 and the bobbin 110, and at the same time, the first fixing part 221 is located on the lower side of the bobbin 110. Allow it to be fixed.

Additionally, due to this structure, the elastic deformation portion 225 can be elastically deformed in the lateral direction of the support member 220 and in the vertical direction of the support member 220. Specifically, the elastic deformable portion 225 may include a first bent portion 225a, a second bent portion 225b, and a second connection portion 225c.

The first bent portion 225a protrudes upward from the second coupling portion 223 and may include at least one bent portion. The first bent portion 225a can be easily elastically deformed in the first, second, and third directions due to the vertical and lateral bent portions of the support member 220 being formed.

The second bent portion 225b protrudes upward from the first fixing portion 221 and may include at least one bent portion. Like the first bent portion 225a, the second bent portion 225b is easily oriented in the first, second, and third directions due to the vertical and lateral bent portions of the support member 220. It can be elastically deformed.

The number and shape of each bent part of the first bent part 225a and the second bent part 225b are determined by the material of the support member 220, the spring constant or rigidity required for the support member 220, and the lens drive. It can be appropriately selected considering the structural relationship with the device, etc.

The second connection portion 225c has its longitudinal direction disposed in the lateral direction of the support member 220, and may serve to connect the upper ends of the first bent portion 225a and the second bent portion 225b. there is.

Accordingly, one end of the second connection portion 225c may be integrally coupled with the first bent portion 225a, and the other end may be integrally coupled with the second bent portion 225b.

Meanwhile, the first bent portion 225a, the second bent portion 225b, and the second connecting portion 225c may be integrally molded using, for example, injection molding. Meanwhile, as described above, the first fixing part 221, the first coupling part 222, the second coupling part 223, the first connecting part 224 and the elastic deformation part ( 225) is also integrally molded by a method such as injection molding, so that the support member 220 can be molded as a whole.

Figure 6 is a front view showing a support member 220 according to another embodiment. Figure 7 is a front view showing a portion of a lens driving device equipped with a support member 220 according to another embodiment.

As shown in Figures 6 and 7, the support member 220 is a pair in which the first coupling part 222, the first connecting part 224, and the first fixing part 221 are symmetrical to each other. It can be formed into a structure that is provided.

At this time, since the second coupling portion 223 is provided as a pair, the protruding portion of the housing 140 provided to oppose the second coupling portion 223 is bonded to the protruding portion of the housing 140. It may be provided as a pair, each disposed at a position corresponding to the pair of second coupling portions 223.

In an embodiment, there are a total of four support members 220, the support members 220 include two first fixing parts 221, and each support member 220 is located at the center of the housing 140. It can be arranged radially with respect to. Accordingly, the lens driving device of the embodiment may be provided with a total of eight first fixing units 221.

In addition, the first coupling portion 222 and the first connecting portion 224 are disposed on the outside of the support member 220, and are formed between the pair of first coupling portions 222 and the second connecting portion 225c. The elastic deformation portion 225 may be disposed.

In the embodiment shown in FIGS. 6 and 7, the first fixing parts 221 are provided as a pair spaced apart in the lateral direction of the support member 220, so that the housing 140 is larger than the case of having one fixing part. ) and tilt of the bobbin 110 can be more effectively suppressed.

In addition, as described above, the bonding that secures or couples the first fixing part 221 and the housing 140 may function as a damping part, and in the embodiment shown in FIGS. 6 and 7, the bonding 1 Like the fixing part 221, it may be provided as a pair on the support member 220.

Therefore, compared to the case of providing a single bonding, in the embodiment shown in FIGS. 6 and 7, the bonding further reduces vibration occurring when the housing 140 and the bobbin 110 operate in the second and third directions. It can be effectively buffered.

Figure 8 is a front view showing a portion of a lens driving device according to an embodiment. In an embodiment, the first magnet 130 is disposed opposite to a side curved portion, i.e., a corner, of the housing 140, and the support member 220 is disposed on a side flat portion, i.e., a straight surface, of the housing 140. Can be placed opposite each other.

Additionally, the first magnets 130 may be provided in plurality, and each of the first magnets 130 may be arranged radially with respect to the center of the housing 140.

Referring to FIGS. 2 and 8 , in the embodiment, the first magnets 130 may be provided in total of four, and may be provided in a trapezoidal shape so that they can be disposed opposite the corners of the housing 140.

Meanwhile, the support members 220 are provided in plurality, and each of the support members 220 is arranged radially with respect to the center of the housing 140 and may be arranged between the first magnets 130. .

Referring to FIGS. 2 and 8 , in the embodiment, a total of four support members 220 are provided, and the overall support members 220 may be formed in a plate shape. Meanwhile, the specific structure of the support member 220 has been disclosed as several examples above, but is not limited thereto and may be provided in various shapes that can be derived from the above examples.

In the embodiment, by using the plate-shaped support member 220, the spring constant can be appropriately adjusted and the distance L (see FIG. 4) can be reduced to effectively suppress the tilt of the housing 140 and the bobbin 110.

Meanwhile, for example, when using a wire-type support member 220, the length of the wire must be reduced to reduce the distance L. In this case, if the spring constant of the support member 220 increases, it is difficult to reduce the spring constant again. You can.

Therefore, it may be more appropriate to use the plate-shaped support member 220 rather than the wire-shaped support member 220 in the lens driving device of the embodiment.

Referring to FIG. 8, in the embodiment, the first distance (h), which is the separation distance in the first direction from the upper surface of the second coil 230 to the lower end of the first fixing part 221, is the distance of the first magnet 130. It may be provided smaller than the first length (a), which is the length in the first direction.

Appropriately, the first distance (h) may be designed to be about half of the first length (a). The range in which the electromagnetic force acting between the first magnet 130 and the second coil 230 used when the lens driving device performs image stabilization is affected is the first direction length of the first magnet 130, that is, the first length ( a) can be greatly affected.

In addition, since the lens driving device performs auto-focusing at the same time as camera shake correction, the housing 140 and the bobbin 110 generate electromagnetic force that interacts with the first magnet 130, the first coil 120, and the second coil 230. It can be operated by .

Therefore, when the first fixing part 221 is disposed adjacent to the area where the electromagnetic force acting between the first magnet 130, the first coil 120, and the second coil 230 is strongest, the electromagnetic force is applied. Compared to the case where the falling point and the first direction position of the first fixing part 221 are somewhat consistent, and the strongest electromagnetic force is applied to the upper or lower side of the first fixing part 221, the housing 140 and the bobbin 110 ) can reduce the size of the tilt.

Therefore, the first distance (h), which is when the electromagnetic force acting between the first magnet 130, the first coil 120, and the second coil 230 acts most strongly, is approximately equal to the first length (a). It may be appropriate to arrange the first fixing part 221 so that it is about half.

Specifically, it may be appropriate to design the first distance (h) to be 0.25 to 0.75 times the first length (a).

In an embodiment, the support member 220 may suppress tilt of the housing 140 and the bobbin 110 by providing a first fixing part 221 fixed to the lower side of the housing 140.

In addition, the first fixing part 221 reduces the length of the central axis of the support member 220 in the first direction, thereby suppressing tilt of the housing 140 and the bobbin 110.

In addition, there is an effect of improving tilt defects when performing camera shake correction of a lens driving device, thereby reducing product defects.

In addition, in the embodiment, by using a plate-shaped support member 220 with a structure that allows adjustment of the spring constant, tilt defects are improved and the distance between each fixing point of the support member 220 is shortened, making the spring constant stronger. By appropriately adjusting the camera shake correction of the lens driving device, there is an effect of smoothly performing camera shake correction.

Meanwhile, the lens driving device according to the above-described embodiment can be used in various fields, such as camera modules. For example, camera modules can be applied to mobile devices such as mobile phones.

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

The lens barrel is as described above, and the printed circuit board 250 may form the bottom surface of the camera module from the portion where the image sensor is mounted.

Additionally, the lens barrel may include at least one lens that transmits an image to the image sensor.

Additionally, the camera module may further include an infrared blocking filter (not shown). The infrared cut-off filter serves to block light in the infrared range from entering the image sensor.

In this case, in the base 210 illustrated in FIG. 2, an infrared cut-off filter may be installed at a position corresponding to the image sensor and may be combined with a holder member (not shown). Additionally, the holder member may support the lower side of the base 210.

A separate terminal member may be installed on the base 210 to conduct electricity with the printed circuit board 250, and it is also possible to form the terminal integrally using surface electrodes, etc.

Meanwhile, the base 210 may function as a sensor holder that protects the image sensor. In this case, a protrusion may be formed in the downward direction along the side of the base 210. However, this is not an essential configuration, and although not shown, a separate sensor holder may be placed at the bottom of the base 210 to perform its role.

Although only a few examples have been described as described above, various other forms of implementation are possible. The technical contents of the above-described embodiments can be combined in various forms unless they are incompatible technologies, and through this, can be implemented as a new embodiment.

110: bobbin
120: first coil
130: First magnet
140: housing
210: base
214: Support member seating groove
220: support member
221: First fixing unit
222: first coupling portion
223: second coupling portion
224: first connection part
225: Elastic deformation part
225a: first bending part
225b: second bending part
225c: second connection part
230: second coil

Claims (18)

housing;
a bobbin disposed within the housing and movable in a first direction;
an upper elastic member located on the bobbin and coupled to the bobbin and the housing;
a lower elastic member located below the bobbin and coupled to the bobbin and the housing;
a support member including an end coupled to the upper elastic member and supporting the housing to be movable in a second direction perpendicular to the first direction or a third direction perpendicular to the first and second directions; and
It includes a damping part coupled to the support member and the housing,
The housing includes a first region coupled to the upper elastic member, a second region coupled to the lower elastic member, and a third region coupled to the damping portion,
The third area is located closer to the second area than the first area. According to paragraph 1,
A lens driving device wherein the damping portion is spaced apart from the upper elastic member and the one end of the support member. According to paragraph 1,
The third area of the housing corresponds to a corner area of the housing. According to paragraph 1,
A lens driving device wherein the damping portion includes at least one of epoxy, thermosetting adhesive, or photocurable adhesive. According to paragraph 1,
A lens driving device wherein the damping part is located lower than the upper elastic member and higher than the lower elastic member. According to paragraph 1,
A lens driving device in which the support member and the upper elastic member are electrically connected to each other by a conductive adhesive. According to paragraph 1,
A magnet disposed in the housing; and
A lens driving device including a first coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the magnet. In clause 7,
A lens driving device including a second coil disposed below the magnet and moving the housing in the second direction or the third direction by interaction with the magnet. According to clause 8,
a circuit board disposed below the housing; and
A lens driving device including a base disposed below the circuit board. According to paragraph 1,
A lens driving device wherein the support member is in the form of a wire. According to clause 9,
The second coil is a lens driving device electrically connected to the circuit board. According to clause 9,
The circuit board is a lens driving device including an upper surface disposed on the upper surface of the base, a terminal surface bent from the upper surface of the circuit board, and terminals formed on the terminal surface. According to paragraph 1,
A lens driving device in which current is applied to the first coil through the upper elastic member and the support member. According to paragraph 1,
A lens driving device wherein the damping unit is located closer to the lower elastic member than the upper elastic member. housing;
a bobbin disposed within the housing;
A magnet disposed in the housing;
a first coil disposed on the bobbin and moving the bobbin in a first direction by interaction with the magnet;
an upper elastic member disposed on the bobbin and coupled to the bobbin and the housing;
a lower elastic member disposed below the bobbin and coupled to the bobbin and the housing;
a support member including one end coupled to the upper elastic member and supporting the housing; and
a second coil that moves the housing in a second direction perpendicular to the first direction or a third direction perpendicular to the first and second directions by interacting with the magnet; and
It includes a damping part coupled to the support member and the housing,
The housing includes a first region coupled to the upper elastic member, a second region coupled to the lower elastic member, and a third region coupled to the damping portion,
A lens driving device wherein the distance between the second area and the third area is smaller than the distance between the first area and the third area. According to clause 15,
A lens driving device wherein the damping portion is spaced apart from the upper elastic member and the one end of the support member. According to clause 15,
The third area of the housing corresponds to a corner area of the housing. housing;
a bobbin disposed within the housing and movable in the optical axis direction;
an upper elastic member coupled to the upper part of the bobbin and the upper part of the housing;
a support member supporting the housing and coupled to the upper elastic member; and
A lens driving device including a damping portion coupled to the support member and the housing.