KR20230006770A - Lens moving apparatus - Google Patents

Abstract

An embodiment of the present invention relates to a lens driving device which comprises: a base; a housing disposed on the base; a bobbin disposed in the housing; a magnet disposed in the housing; a coil disposed in the bobbin to move the bobbin by means of electro electrical interaction with the magnet; an upper elastic member including a first inner frame disposed on the bobbin to be joined to the bobbin and a first outer frame joined to the housing; a support member having one end joined to the first outer frame and the other end joined to the base; a circuit board disposed on the base; and a damping member disposed on a part of the support member, wherein the damping member is interposed between one end and the other end of the support member to be spaced apart from the one end and the other end of the support member. Accordingly, the effect of a function of preventing handshaking can be enhanced.

Description

Lens driving device {LENS MOVING APPARATUS}

Embodiments relate to a lens driving device, and more particularly, to a lens driving device with improved effects of an anti-shake function.

The contents described in this part simply provide background information on the embodiments and do not constitute prior art.

In recent years, the development of IT products such as mobile phones, smart phones, tablet PCs, and laptops with built-in micro digital cameras has been actively conducted.

In the case of a camera module mounted on a small electronic product such as a smartphone, the camera module may be frequently shocked during use, and the camera module may be slightly shaken due to a user's hand shake during shooting. In view of this point, there has recently been a demand for the development of a technology for additionally installing a hand-shake prevention means in a camera module.

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

Accordingly, an object of the embodiments is to provide a lens driving device with improved effects of an anti-shake function.

The technical problem to be achieved by the embodiment is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A lens driving device according to an embodiment includes a base; a housing disposed on the base; a bobbin disposed within the housing; a magnet disposed in the housing; a coil disposed on the bobbin and moving the bobbin by electromagnetic interaction with the magnet; an upper elastic member disposed on the bobbin and including a first inner frame coupled to the bobbin and a first outer frame coupled to the housing; a support member having one end coupled to the first outer frame and the other end coupled to the base; a circuit board disposed on the base; and a damping member disposed on a portion of the support member, wherein the damping member is disposed between the one end and the other end of the support member and spaced apart from the one end and the other end of the support member.

The circuit board may include a terminal portion bent from an upper surface and a plurality of terminals formed on the terminal portion.

The magnet may be disposed at four corners of the housing.

The damping member may be formed of a thermosetting material or an ultraviolet curable material.

A seating groove for disposing the magnet may be formed at each of the four corners of the housing.

The support member may be electrically connected to the upper elastic member.

A terminal member electrically connected to the circuit board may be formed on the base.

The upper elastic member may include a first connecting member connecting the first inner frame and the first outer frame, and the first connecting member may be bent at least once.

A first through hole is formed in the first inner frame, the bobbin includes a first support protrusion coupled to the first through hole, a second through hole is formed in the first outer frame, and the housing includes the second through hole. A second support protrusion coupled to the through hole may be included.

The base may include a support groove formed on a surface facing the bent terminal unit.

The lens driving device includes a second inner frame disposed below the bobbin and coupled to the bobbin, a second outer frame coupled to the housing, and a second connecting member connecting the second inner frame and the second outer frame. And a lower elastic member comprising a, wherein the second connection member can be bent at least once.

A lens driving device according to another embodiment includes a base; a housing disposed on the base; a bobbin disposed within the housing; a magnet disposed in the housing; a coil disposed on the bobbin and moving the bobbin by electromagnetic interaction with the magnet; an upper elastic member disposed on the bobbin and including a first inner frame coupled to the bobbin and a first outer frame coupled to the housing; and a support member coupled to the upper elastic member.

According to the embodiment, the damping coefficient of the support member can be changed by adjusting the position and number of bonding parts, the direction of the control plate and the rotation angle, and resonance of the support member can be avoided by adjusting the damping coefficient. There is an effect of securing good control characteristics.

In addition, according to the embodiment, since each component of the support member is coupled to each other by a bonding part, even if there is an external impact such as a fall, sudden deformation of the whole and/or part of the support member does not occur, thereby ensuring mechanical reliability for control of the support member. has the effect of securing

1 is a perspective view schematically illustrating a lens driving device according to an exemplary embodiment.
2 is an exploded perspective view illustrating a lens driving device according to an exemplary embodiment.
3 is a perspective view illustrating a housing according to an exemplary embodiment.
4 is a rear perspective view showing a housing according to an exemplary embodiment.
5 is a plan view illustrating an upper elastic member according to an embodiment.
6 is a plan view showing a lower elastic member according to an embodiment.
7 is a perspective view showing a state in which a support member is disposed according to an exemplary embodiment.
Figure 8a is a front view showing a support member according to an embodiment.
8B is a front view showing a support member according to another embodiment.
8C is a front view illustrating a state in which a support member is mounted on a housing according to an exemplary embodiment.
8D is a front view showing a state in which a support member is mounted on a housing according to another embodiment.
9A is a front view illustrating an embodiment of a bonding portion formed on a support member according to an embodiment.
9B is a front view illustrating another embodiment of a bonding unit formed on a support member according to an embodiment.
10A and 10B are front views illustrating yet another embodiment of a bonding part formed on a support member according to an embodiment.
11 is a schematic plan view illustrating yet another embodiment of a bonding part formed on a support member according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Embodiments can apply various changes and can have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiments to a specific form disclosed, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the embodiments. 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" and "second" may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the configuration and operation of the embodiment are only for describing the embodiment, and do not limit the scope of the embodiment.

In the description of the embodiment, in the case where it is described as being formed on "upper (above)" or "lower (on or under)" of each element, on or under (on or under) ) includes both elements formed by directly contacting each other or by indirectly placing one or more other elements between the two elements. In addition, when expressed as “up (up)” or “down (down) (on or under)”, it may include the meaning of not only the upward direction but also the downward direction based on one element.

In addition, relational terms such as "upper/upper/upper" and "lower/lower/lower" 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.

In addition, an orthogonal coordinate system (x, y, z) can be used in the drawing. In the drawing, the x-axis and the y-axis mean planes perpendicular to the optical axis, and for convenience, the optical axis direction (z-axis direction) can be referred to as a first direction, an x-axis direction as a second direction, and a y-axis direction as a third direction. .

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

An image stabilization device applied to a small camera module of a mobile device such as a smartphone or tablet PC is designed to prevent the outline of a captured image from being formed clearly due to vibration caused by the user's hand shake when capturing a still image. means a configured device. In addition, the auto focusing device is a device that automatically focuses an image of a subject on an image sensor surface. Such an image stabilization device and an auto-focusing device can be configured in various ways. In the case of an embodiment, an optical module composed of a plurality of lenses is moved in a first direction or moved on a plane perpendicular to the first direction to prevent such hand shake. A correction operation and/or an auto focusing operation may be performed.

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

As shown in FIG. 2, the movable part 100 includes a bobbin 110, a coil 120, a first magnet 130, a housing 140, an upper elastic member 150, and a lower elastic member 160. can do.

The bobbin 110 has a coil 120 disposed inside the first magnet 130 on an outer circumferential surface, and the housing ( 140) may be installed to be reciprocally movable in the first direction in the inner space. A coil 120 may be installed on an outer circumferential 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 moves in a first direction to perform an auto focusing function.

Although not shown, 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 screw thread may be formed on an inner circumferential surface of the bobbin 110 and a male screw thread corresponding to the screw thread may be formed on an outer circumferential surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screwing of the female screw thread. However, this is not limited thereto, and the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screw coupling without forming a thread on the inner circumferential surface of the bobbin 110 . Alternatively, the one or more lenses may be integrally formed with the bobbin 110 without a lens barrel.

The lens coupled to the lens barrel may be composed of one sheet, or two or more lenses may 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 an initial position, and when a reverse current is applied, the bobbin 110 may move downward from an initial position. Alternatively, the moving distance in one direction from the initial position may be increased or decreased by adjusting the amount of one-way current.

A plurality of upper support protrusions 113 (see FIG. 7 ) and lower support protrusions (not shown) may protrude from the upper and lower surfaces of the bobbin 110 . The upper support protrusion 113 may be provided in a cylindrical shape or a prismatic shape, and may couple and fix the inner frame 151 of the upper elastic member 150 and the bobbin 110 .

According to the embodiment, a first through hole 151a may be formed at a position corresponding to the upper support protrusion 113 of the inner frame 151 .

In this case, the upper support protrusion 113 and the first through hole 151a may be fixed by thermal fusion or by an adhesive material such as epoxy. In addition, a plurality of upper support protrusions 113 may be provided. At this time, the distance between each of the upper support protrusions 113 may be appropriately arranged within a range in which interference with neighboring parts can be avoided.

That is, each of the upper support protrusions 113 may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110, and their intervals are not constant, but with respect to a specific imaginary line passing through the center of the bobbin 110 It may be formed to be symmetrical.

The lower support protrusion may be provided in a cylindrical shape or a prismatic shape like the upper support protrusion 113, and may couple and fix the inner frame 161 of the lower elastic member 160 and the bobbin 110.

According to the embodiment, a second through hole 161a may be formed at a position corresponding to the lower support protrusion of the inner frame 161 . In this case, the lower support protrusion and the second through hole 161a may be fixed by thermal fusion or by an adhesive material such as epoxy. In addition, a plurality of lower support protrusions may be provided as shown in FIG. 9 .

At this time, the distance between each of the lower support protrusions may be appropriately arranged within a range in which interference with neighboring parts can be avoided. That is, each lower support protrusion may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110 .

The housing 140 has a hollow pillar shape supporting the first magnet 130 and may be formed in a substantially rectangular shape. can In this case, the housing 140 may include a first surface 141 and a second surface 142 . The first surface 141 may be a surface on which the first magnet 130 is installed, and the second surface 142 may be a surface on which the support member 220 is disposed.

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

The seating portion 141a of the first magnet 130 may be formed as a groove corresponding to the size of the first magnet 130, and has at least three surfaces facing the first magnet 130, that is, both side surfaces and top surfaces. view can be placed.

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

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

In addition, the third stopper 143 may also serve to guide the installation position of the upper elastic member 150. To this end, as shown in FIG. 3, the third stopper 143 of the upper elastic member 150 A guide groove 155 having a corresponding shape may be formed at a position corresponding to the stopper 143 .

Meanwhile, the first surface 141 may be disposed parallel to the side surface of the cover member 300, but is not limited thereto, and the first surface 141 has a surface larger than the second surface 142. It can be formed to have

In addition, as shown in FIGS. 3 and 4 , the escape groove 142a having a certain depth may be concavely formed on the second surface 142 . In the embodiment, the lower surface of the escape groove 142a may form an open opening. However, it is not limited thereto, and an opening in which the upper surface of the escape groove 142a is open may be formed, or an opening in which both the upper and lower surfaces are open may be formed.

Since the escape groove 142a is provided, when the bobbin 110 moves in the first direction with respect to the housing 140, spatial interference between the connecting members 153 and 163 and the bobbin 110 is eliminated and the connecting member 153 ) 163 can be more easily elastically deformed. In addition, the lower part of the escape groove 142a can prevent the second coupling part 224 of the lower part of the support member 220 from interfering with the housing 140 . Also, as shown in FIG. 4 , the upper side of the escape groove 142a constitutes a stepped portion 142b to support a part of the upper side of the support member 220 .

In addition, the location of the escape groove 142a may be disposed on the side of the housing 140 as in the embodiment, but the connection members 153 and 163 of the elastic members 150 and 160 and the support member 220 Depending on the shape and/or position, it may be disposed at the corner of the housing 140.

In addition, a plurality of upper frame support protrusions 144 to which the outer frame 152 of the upper elastic member 150 is coupled may protrude from the upper side of the housing 140 . In this case, the number of upper frame support protrusions 144 may be greater than the number of upper support protrusions 113 described above. This is because the length of the outer frame 152 is longer than the length of the inner frame 151 .

Meanwhile, a third through hole 152a having a corresponding shape may be formed in the outer frame 152 corresponding to the upper frame support protrusion 144, and may be fixed there using an adhesive or thermal fusion.

In addition, as shown in FIG. 4 , a plurality of lower frame support protrusions 145 coupled to the outer frame 162 of the lower elastic member 160 may protrude from the lower side of the housing 140 . In this case, the number of lower frame support protrusions 145 may be greater than the number of the lower support protrusions described above. This is because the length of the outer frame 162 of the lower elastic member 160 is longer than the length of the inner frame 161 .

Meanwhile, a fourth through hole 162a having a corresponding shape may be formed in the outer frame 162 corresponding to the lower frame support protrusion 145, and may be fixed there using an adhesive or thermal fusion.

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

In addition, the fourth stopper 147 may maintain a predetermined distance from the base 210 and/or the printed circuit board 250 during an initial state and normal operation. Through this configuration, the housing 140 is spaced downward from the base 210 and upward from the cover member 300, so that the height in the first direction can be maintained by the support member 220 without vertical interference. . Accordingly, the housing 140 may perform shifting operations in second and third directions perpendicular to the first direction.

As shown in FIGS. 5 and 6 , 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.

The upper elastic member 150 is provided on the upper side of the bobbin 110, the inner frame is coupled to the bobbin 110, and the outer frame is coupled to the housing 140. The lower elastic member 160 is provided on the lower side of the bobbin 110, the inner frame is coupled to the bobbin 110, and the outer frame is coupled to the housing 140.

The upper elastic member 150 and the lower elastic member 160 include the inner frames 151 and 161 coupled to the bobbin 110 and the outer frames 152 and 162 coupled to the housing 140 and the inner frame 151 ) 161 and the outer frames 152 and 162 may include connecting members 153 and 163.

The connecting members 153 and 163 may be bent at least once to form a pattern having a predetermined shape. The bobbin 110 may be elastically (or elastically) supported during the upward and/or downward motion in the first direction through the change in position and fine deformation of the connecting members 153 and 163.

According to the embodiment, as shown in FIG. 5, the upper elastic member 150 has a plurality of first through-holes 152a in the outer frame 152 and a plurality of second through-holes in the inner frame 151 ( 151a) may be provided.

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

The connection member 153 may connect the inner frame 151 and the outer frame 152 so that the inner frame 151 is elastically deformable in a first direction within a predetermined range with respect to the outer frame 152. there is.

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

As shown in FIG. 6, the lower elastic member 160 has a plurality of insertion grooves 162a or holes in the outer frame 162, and a plurality of third through holes 161a or grooves can be provided.

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

The connecting member 163 may connect the inner frame 161 and the outer frame 162 such that the inner frame 161 is elastically deformable in a first direction in a predetermined range with respect to the outer frame 162. there is.

As shown in FIG. 5 , the upper elastic member 150 may include a first upper elastic member 150a and a second upper elastic member 150b separated from each other. Through this two-part structure, the upper elastic member 150 can receive currents of different polarities or different power sources from each other to the first upper elastic member 150a and the second upper elastic member 150b.

That is, after the inner frame 151 and the outer frame 152 are coupled to the bobbin 110 and the housing 140, respectively, the inner frame corresponding to both end lines of the coil 120 disposed on the bobbin 110. By providing a solder part at the position 151, a current having a different polarity or a different power source can be applied by performing a conductive connection such as soldering in the solder part. In addition, the first upper elastic member 150a is electrically connected to one of the ends of the coil 120, and the other of the ends of the coil 120 and the second upper elastic member 150b are electrically connected. connected, and may receive current and/or voltage from the outside.

Meanwhile, the upper elastic member 150 and the lower elastic member 160, the bobbin 110, and the housing 140 may be assembled through thermal fusion and/or bonding using an adhesive. At this time, the fixing operation may be completed by bonding using an adhesive after fixing by thermal fusion according to the assembly sequence.

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

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

The printed circuit board 250 is coupled to the upper surface of the base 210, and as shown in FIG. 2, a through hole may be formed at a corresponding position to expose the seating groove 214 of the support member 220. there is.

A surface on which the bent first terminal unit 251 is installed may be formed on the printed circuit board 250 . In the embodiment, the printed circuit board 250 may form a surface on which one bent first terminal unit 251 is installed. A plurality of terminals 251b are disposed on the surface on which the first terminal unit 251 is installed, and external power may be applied to supply current to the coil 120 . The number of terminals 251b formed in the first terminal unit 251 may be increased or decreased according to the types of components that need to be controlled. In addition, the printed circuit board 250 may have one more bent surface and may further include a terminal part.

The base 210 is disposed below the bobbin, and as shown in FIG. 2 , it may be provided in a substantially rectangular shape, and the support member 220 may be fixed to a straight surface. A step 211 may be formed on the base 210 so that an adhesive may be applied when the cover member 300 is adhesively fixed. At this time, the bottom surface of the step may be in contact with the end of the cover member 300 .

A support groove having a corresponding size may be formed on a surface of the base 210 facing the portion of the printed circuit board 250 where the first terminal portion 251 is formed. The support groove is formed concave inward from the outer circumferential surface of the base 210 to a certain depth, so that the portion where the first terminal portion 251 is formed does not protrude outward or the amount of protrusion can be adjusted.

On the other hand, the step 211 can guide the cover member 300 coupled to the upper side, and also, the end of the cover member 300 can be coupled to surface contact. At this time, the step 211 and the end of the cover member 300 may be adhesively fixed and sealed with an adhesive or the like.

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

An end of the support member 220 may be inserted or placed into the seating groove 214 of the support member 220 and fixed through an adhesive or the like. A plurality of or at least one seating groove 214 may be formed on a straight surface on which the support member 220 is installed, and the seating groove 214 may have a substantially rectangular shape.

In addition, as shown in FIG. 2, in the embodiment, two seating grooves 214 may be provided for each straight surface, which may be increased or decreased according to the shape of the support member 220, or one may be formed. More than one may be formed.

The cover member 300 may be provided in a substantially box shape and may cover the movable part 100 , the printed circuit board 250 , and the base 210 . At this time, as shown in FIG. 1, etc., the cover member 300 has a relief skin or groove portion formed at a position corresponding to the step 211 of the base 210, and an adhesive or the like can be injected through the relief skin or groove portion. there is.

At this time, the injected adhesive is set to have a low viscosity, so that the adhesive injected through the relief or groove can permeate the contact position between the step 211 and the end of the cover member 300. In this way, the adhesive member applied to the relief or groove fills the gap between the facing surfaces of the cover member 300 and the base 210 through the relief or groove, so that the cover member 300 is attached to the base. It can be configured to seal while being combined with (210).

Meanwhile, a camera module may be configured by disposing the image sensor 810 and the printed circuit board 250 under the base 210 and assembling the lens barrel to the bobbin 110 . Alternatively, a separately configured image sensor holder may be further included under the base 210 . Alternatively, the base 210 may be extended downward to directly couple the camera module substrate on which the image sensor is mounted on the bottom side. In addition, the camera module may be applied to mobile devices such as mobile phones.

7 is a perspective view showing a state in which a support member 220 is disposed according to an embodiment. 8A is a front view showing a support member 220 according to an embodiment. 8B is a front view showing a support member 220 according to another embodiment. 8C is a front view illustrating a state in which the support member 220 is mounted on the housing 140 according to an exemplary embodiment. 8D is a front view showing a state in which the support member 220 is mounted on the housing 140 according to another embodiment.

The support member 220 is disposed on the side of the housing 140, has an upper side coupled to the housing 140 and a lower side coupled to the base 210, and the bobbin 110 and the housing 140 are It is supported so as to be movable in the second and third directions perpendicular to the first direction, electrically connected to the coil 120, and a bonding portion 226 for adjusting a damping coefficient at least in part. can be placed.

As shown in FIG. 7 , the support members 220 are individually disposed on the second surface 142 of the housing 140 to support the housing 140 at a predetermined distance from the base 210 . One end of the support member 220 may be inserted or placed into the seating groove 214 of the support member 220 and fixed with an adhesive such as epoxy, and the other end may be fixed to the upper end of the side wall of the housing 140. .

Since the support member 220 according to the embodiment is disposed on the second surface 142 of the housing 140, a total of four may be installed symmetrically. However, it is not limited to this, and it is also possible to consist of eight, two for each straight plane. Also, the support member 220 may be electrically connected to the upper elastic member 150 . Alternatively, it may be electrically connected to the straight surface of the upper elastic member 150 .

Specifically, in the first embodiment, the support member 220 includes a first coupling portion 221, a second coupling portion 224, a first elastic deformation portion 222, a second elastic deformation portion 223, a connection portion ( 225) and a control plate 227. In another embodiment, the support member 220 may include a first coupling portion 221, a second coupling portion 224, and a connection portion 225, and a portion of the connection portion may function as a control plate and may be elastically deformed. can function

In the first embodiment, the first coupling part 221 is connected to the upper end of the second surface 142 of the housing 140, and a concave groove is formed at a position corresponding to the coupling protrusion protruding from the second surface 142. They can be fixed or arranged by fitting them together.

In addition, since the support member 220 is formed as a separate member from the upper elastic member 150, the first coupling part 221 is such that the support member 220 and the upper elastic member 150 are bonded with an electrically conductive adhesive, soldering, welding, etc. can be electrically connected through Accordingly, the upper elastic member 150 may apply current to the coil 120 through the electrically connected support member 220 .

The second coupling portion 224 is a portion coupled to the base 210, may be provided at an end of the support member 220, and is a plate wider than the first and second elastically deformable portions 222 and 223. It may be provided in a shape, but is not limited thereto, and may have a narrow or corresponding width.

According to the embodiment, the second coupling portion 224 is separated into two as shown in FIGS. 8A and 8B, and each can be inserted or disposed in the seating groove 214 of the support member 220 of the base 210. . The second coupling part 224 may be fixedly coupled to the seating groove 214 of the support member 220 by an adhesive member such as epoxy, or may be coupled without a seating groove.

However, it is not limited thereto, and the seating groove 214 of the support member 220 may correspond to the second coupling part 224 so as to fit and combine them. Alternatively, one second coupling part 224 may be formed, or two or more may be formed. Correspondingly, the base 210 may have a seating groove 214 for the support member 220 formed therein.

The elastic deformable parts 222 and 223 are provided in a shape bent at least once or more to form a pattern of a certain shape. According to the embodiment, the elastic deformation part may include first and/or second elastic deformation parts 222 and 223, and the first elastic deformation part 222 is It extends from the first coupling part 221 and is connected to the connection part 225 . The second elastically deformable part 223 extends from the first coupling part 221 and is connected to the connection part 225 .

In addition, it may be formed with the connecting portion 225 interposed in the middle, and may also be provided in a shape corresponding to each other. For example, as shown in FIGS. 8A and 8B, when the first elastically deformable portion 222 is provided in a zigzag shape through two or more bends, the second elastically deformable portion 223 may also be formed to correspond thereto, but this It is not limited, and only the first elastic deformation part 222 or the second elastic deformation part 223 may be provided in a different shape.

The above is only one embodiment, and it is also possible to configure it to have various patterns such as a zigzag shape. At this time, the first and second elastic deformation parts 222 and 223 may be configured as one without distinguishing them, or configured only in the form of a suspension wire without such a pattern.

According to the embodiment, straight portions of the first and second elastically deformable parts 222 and 223 may be formed substantially parallel to a plane perpendicular to the first direction.

When the housing 140 moves in the second and/or third directions, which are planes perpendicular to the first direction, the elastic deformation parts 222 and 223 are the direction in which the housing 140 moves or the length of the support member 220. It can be finely elastically deformed in the direction.

Then, the housing 140 can be moved in the second and third directions substantially perpendicular to the first direction without a change in position in the first direction, thereby increasing the accuracy of hand shake correction. This utilizes the characteristic that the elastic deformation parts 222 and 223 can be stretched in the longitudinal direction. Here, the longitudinal direction may be a direction connecting the first and second coupling parts 221 and 224 .

The connection part 225 may connect the first elastic deformation part 222 and the second elastic deformation part 223 to each other and may be provided as a pair disposed symmetrically with each other. As described above, the connecting portion 225 may be disposed in the middle of the elastic deformable portions 222 and 223, but is not limited thereto, and may be disposed in connection with one elastic deformable portion.

In the case of the embodiment, the first and second elastic deformation parts 222 and 223 are provided in pairs, respectively, but the first and second coupling parts 221 and 224 are formed as one body, and the pair of first And the second elastic deformation parts 222 and 223 may be fixed to the housing 140 and the base 210 at once.

In addition, one or more coupling parts may be provided at both ends of the support member 220 , and one or more elastic deformable parts may be included between both ends of the support member 220 .

The control plate 227 is formed by being coupled to each of the pair of connection parts 225, at least a part of the bonding part 226 of the support member 220 is coupled, and according to the deformation of the support member 220, the It is provided to be able to rotate in at least one of the first direction, the second direction, and the third direction. In addition, each of the control plates 227 may be disposed to face each other, and may be fixed or coupled to each other by the bonding part 226 .

The control plate 227 may serve to adjust the damping coefficient of the support member. That is, the control plate 227 can change the shape of the support member 220 by rotating in at least one direction of the first direction, the second direction, and the third direction in order to adjust the damping coefficient of the support member 220. , the damping coefficient of the support member 220 changes according to the shape deformation of the support member 220. After setting the position by rotating the adjusting plate 227 so that the shape deformation of the support member 220 reaches a predetermined level so that the damping coefficient of the support member 220 reaches a desired value, the bonding unit 226 is placed to support the support member ( 220) and the adjusting plate 227 are hardened to maintain the deformed constant shape.

At this time, since the damping coefficient is determined in proportion to the relative displacement of the control plate 227 with respect to the elastic deformation parts 222 and 223, the support member 220 is designed by adjusting the position and rotation angle of the control plate 227. The damping coefficient with the best control characteristic of can be selected.

On the other hand, even if the control plate 227 is not provided or provided, the bonding part 226 is disposed on a part other than the control plate 227, for example, the elastic deformation part 222, 223 and/or the connection part 225. In this case, since the relative displacement between the elastic deformation parts 222 and 223 and the connection part 225 is less than a certain range, the damping coefficient cannot be increased beyond a desired range. Therefore, in this case, a damping coefficient of a desired value cannot be obtained, which may result in deterioration of control characteristics of the support member 220 .

On the other hand, the bonding unit 226 may be provided with a heat curable material, an ultraviolet (UV) curable material, etc. to facilitate its arrangement work, and may be a damping member. The damping member may be a gel type such as UV damper or damping silicon.

Meanwhile, the control plate 227 may be provided in a plate shape as an embodiment, and at least a portion of the control plate 227 may be provided with a plurality of through holes 227a or recessed grooves. However, although the through hole 227a is shown in each drawing of the embodiment for a clear description, a recessed groove may be formed instead of the through hole 227a in the control plate 227, and the through hole 227a and the recessed groove are mixed. may be formed.

When the bonding portion 226 permeates into the through hole 227a or the recessed groove in a liquid state and is hardened, the bonding strength of the bonding portion 226 to the support member 220 can be increased. In particular, the through hole 227a can easily reach the inside of the bonding part 226 through the through hole 227a when the bonding part 226 is formed of a heat curable or ultraviolet curable material. There is an effect of increasing the curing speed of the bonding portion 226.

The bonding unit 226 may adjust the damping coefficient of the support member 220 by being disposed on the support member 220 . The support member 220 can control the moving speed, frequency, etc. in the second direction and/or the third direction by adjusting the damping coefficient.

The damping coefficient must be appropriately selected to effectively control the driving of the support member 220 in the first and second directions and to avoid a resonance phenomenon caused by driving or vibration of the support member 220 .

Appropriate selection of the damping coefficient of the support member 220 is possible by arranging various numbers of bonding units 226 at various positions of the support member 220 . In the following, various embodiments of the arrangement position and number of bonding units 226 will be described with reference to each drawing.

9A is a front view illustrating an embodiment of a bonding unit 226 disposed on a support member 220 according to an embodiment. Figure 9b is a front view showing another embodiment of the bonding portion 226 disposed on the support member 220 according to one embodiment.

As shown in FIG. 9A , in one embodiment, one bonding unit 226 is disposed, and the bonding unit 226 fixes or couples each control plate 227 and the first coupling unit 221 to each other. can do.

As shown in FIG. 9B, in another embodiment, two bonding parts 226 are disposed, and the bonding parts 226 include the adjusting plate 227, the first coupling part 221, and the first elastic deformation. The parts 222 may be fixed or coupled to each other.

At this time, as described above, the through hole 227a formed in the control plate 227 has an effect of increasing the bonding strength of the bonding part 226 in the support member 220, and the bonding part 226 is thermosetting. Alternatively, when formed of an ultraviolet curable material, there is an effect of increasing the curing speed of the bonding portion 226 .

The arrangement position and number of bonding units 226 described above are merely examples, and other bonding units 226 may be provided in various numbers at various arrangement positions.

Meanwhile, although not shown, the bonding unit 226 may fix or couple only each control plate 227 to each other. For example, the bonding portion 226 may be formed on at least one of an upper part, a central part, and a lower part of each control plate 227 at a part where each control plate 227 faces each other. ) may be fixed or combined with each other.

10A and 10B are front views illustrating another embodiment of a bonding portion 226 formed on a support member 220 according to an embodiment. 11 is a schematic plan view illustrating another embodiment of a bonding portion 226 formed on a support member 220 according to an embodiment.

As shown in FIG. 10A , each control plate 227 may be rotated at a predetermined angle on a plane formed by the x-axis and the z-axis with the y-axis as a rotation center. At that position, the bonding unit 226 is formed as one unit, and the bonding unit 226 may fix or couple the control plates 227 and the first coupling unit 221 to each other.

As shown in FIG. 10B , each control plate 227 may be rotated at a predetermined angle on a plane formed by the x-axis and the z-axis with the y-axis as a rotation center. At that position, two bonding parts 226 are disposed, and the bonding parts 226 fix or couple the control plate 227, the first coupling part 221, and the first elastic deformation part 222 to each other. can do.

At this time, the support member 220 includes a pair of first coupling portions 221, second coupling portions 224, first elastic deformation portions 222, second elastic deformation portions 223, and connection portions 225, respectively. , Since the control plates 227 are arranged symmetrically with each other, it is necessary to balance each of these components. To this end, it is appropriate to rotate the pair of control plates 227 in different directions, and arrange the respective components to be symmetrical to each other after rotation.

As described above, the arrangement position and number of the bonding units 226 are only examples, and other bonding units 226 may be provided in various numbers at various arrangement positions.

In addition, although not shown, as described above, the bonding unit 226 may fix or couple only each control plate 227 to each other. For example, the bonding portion 226 may be formed on at least one of an upper part, a central part, and a lower part of each control plate 227 at a part where each control plate 227 faces each other. ) may be fixed or combined with each other.

As shown in FIG. 11, each of the control plates 227 may be rotated at a certain angle on a plane formed by the x-axis and the y-axis with the z-axis as the center of rotation. At that position, at least one bonding part 226 is formed, and the bonding part 226 fixes or couples each of the control plates 227 and the first coupling part 221 to each other, or the control plate 227, The first coupling part 221 and the first elastic deformation part 222 may be fixed or coupled to each other.

In addition, although not shown, as described above, the bonding unit 226 may fix or couple only each control plate 227 to each other. For example, the bonding portion 226 may be formed on at least one of an upper part, a central part, and a lower part of each control plate 227 at a part where each control plate 227 faces each other. ) may be fixed or combined with each other.

At this time, as described above, the support member 220 includes a pair of first coupling portions 221, second coupling portions 224, first elastic deformation portions 222, and second elastic deformation portions 223, respectively. , connecting portion 225, and control plate 227 are arranged symmetrically with each other, it is necessary to balance each of these components. To this end, it is appropriate to rotate the pair of control plates 227 in different directions, and arrange the respective components to be symmetrical to each other after rotation.

In addition, although not shown, the bonding unit 226 may be formed in the above manner by rotating the adjusting plate 227 three-dimensionally at a predetermined angle around the y-axis and the z-axis.

As described above, the damping coefficient of the support member 220 may be determined by the arrangement position and number of bonding units 226, the rotation direction and rotation angle of the control plate 227, and the like. Therefore, a desired damping coefficient, that is, a damping coefficient that can avoid resonance of the support member 220 and implements a desired value for the moving speed or frequency of the support member 220 in the second and/or third directions In order to obtain, after arranging the bonding parts 226 in various positions and numbers, the damping coefficient of the support member 220 may be measured and a support member 220 having a desired damping coefficient may be used.

According to the above embodiment, the damping coefficient of the support member 220 can be changed by adjusting the arrangement position and number of the bonding parts 226, the direction of the control plate 227 and the rotation angle, and by adjusting the damping coefficient, the support Resonance of the member 220 can be avoided and good control characteristics of the support member 220 can be secured.

In addition, according to the embodiment, since each component of the support member 220 is coupled to each other by the bonding portion 226, even if there is an external impact such as a fall, sudden deformation of all and/or part of the support member 220 does not occur. Therefore, there is an effect of securing mechanical reliability for the control of the support member 220.

Meanwhile, the lens driving device according to the above-described embodiment may be used in various fields, for example, a camera module. For example, the camera module 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), a printed circuit board 250, and an optical system.

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

Also, the optical system may include at least one or more lenses that transmit images to the image sensor. At this time, an actuator module capable of performing an auto focusing function and a hand shake compensation function may be installed in the optical system. The actuator module performing the auto focusing function may be configured in various ways, and a voice coil unit motor is generally used. The lens driving device according to the above-described embodiment may serve as an actuator module that performs both an auto focusing function and a hand shake correction function.

In addition, the camera module may further include an infrared cut filter (not shown). The infrared cut filter serves to block light in the infrared region from being incident on the image sensor. In this case, in the base 210 illustrated in FIG. 1 , an infrared cut filter may be installed at a position corresponding to the image sensor and may be coupled to a holder member (not shown). In addition, the base 210 may support the lower side of the holder member.

A separate terminal member may be installed on the base 210 to conduct electricity with the printed circuit board 250, or the terminal may be integrally formed using a surface electrode or the like. Meanwhile, the base 210 may function as a sensor holder to protect the image sensor, and in this case, a protrusion may be formed downward along a side surface of the base 210 . However, this is not an essential configuration, and although not shown, a separate sensor holder may be disposed below the base 210 to perform its role.

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

100: moving part
110: bobbin
120: coil
130: magnet
140: housing
150: upper elastic member
160: lower elastic member
210: base
220: support member
221: first coupling part
222: first elastic deformation part
223: second elastic deformation part
224: second coupling part
225: connection part
226: bonding unit
227: throttle
227a: through hole
300: cover member

Claims (15)

Base;
a housing disposed on the base;
a circuit board disposed between the base and the housing;
a bobbin disposed within the housing;
a magnet disposed in the housing;
a coil disposed on the bobbin;
an upper elastic member coupled to the bobbin and the housing;
a support member coupled to the upper elastic member and electrically connected to the circuit board; and
Including a first damping member in contact with one side of the support member,
The first damping member is disposed between the upper elastic member and the circuit board and spaced apart from the upper elastic member and the circuit board. According to claim 1,
The lens driving device wherein the magnet is disposed at four corners of the housing. According to claim 2,
A lens driving device having a seating groove for disposing the magnet at each of the four corners of the housing. According to claim 1,
The circuit board includes a terminal portion bent from an upper surface, and a plurality of terminals formed on the terminal portion. According to claim 4,
The lens driving apparatus of claim 1, wherein the base includes a support groove formed on a surface facing the bent terminal unit. According to claim 1,
The first damping member is closer to the center of the support member than the upper elastic member. According to claim 1,
The first damping member is a lens driving device formed of a thermosetting material or an ultraviolet curable material. According to claim 1,
The lens driving device of claim 1 , wherein the support member is electrically connected to the upper elastic member. According to claim 1,
The upper elastic member includes a first frame coupled to the bobbin, a second frame coupled to the housing, and a first connecting member connecting the first frame and the second frame,
The lens driving device of claim 1 , wherein the first connecting member is bent at least once. According to claim 9,
A first through hole is formed in the first frame, and the bobbin includes a first support protrusion coupled to the first through hole,
The lens driving apparatus of claim 1 , wherein a second through hole is formed in the second frame, and the housing includes a second support protrusion coupled to the second through hole. According to claim 1,
Further comprising a lower elastic member coupled to the lower portion of the bobbin and the lower portion of the housing,
The first damping member is a lens driving device spaced apart from the lower elastic member. According to claim 11,
The lower elastic member includes a lens disposed below the bobbin and including a third frame coupled to the bobbin, a fourth frame coupled to the housing, and a second connecting member connecting the third frame and the fourth frame. drive. According to claim 1,
A lens driving device in which a terminal member electrically connected to the circuit board is formed on the base. Base;
a housing disposed on the base;
a circuit board disposed between the base and the housing;
a bobbin disposed within the housing;
a magnet disposed in the housing;
a coil disposed on the bobbin;
an upper elastic member coupled to the bobbin and the housing;
a support member coupled to the upper elastic member and electrically connected to the circuit board; and
Including a first damping member in contact with one side of the support member,
The circuit board includes a first area on which a plurality of terminals are disposed and which is disposed on a first side of the base;
The lens driving device of claim 1 , wherein the first side surface of the base includes a groove in which the first area of the circuit board is disposed. Base:
a cover coupled to the base;
a housing disposed within the cover;
a circuit board disposed between the base and the housing;
a bobbin disposed within the housing;
a magnet disposed between the cover and the housing;
a coil disposed between the bobbin and the magnet;
an upper elastic member coupled to the bobbin and the housing;
a support member coupled to the upper elastic member and electrically connected to the circuit board; and
Including a first damping member in contact with one side of the support member,
The circuit board includes a first area on which a plurality of terminals are disposed and which is disposed on a first side of the base;
The cover includes a first side plate facing the first side surface of the base, and the first side plate of the cover has an overlapping area overlapping the first area of the circuit board in a direction perpendicular to an optical axis and the overlapping area. and a first groove formed between corners of the cover.

Images