KR20200129620A - A lens moving unit, and camera module and optical instrument including the same - Google Patents

Abstract

A lens driving device capable of simplifying bonding work according to an embodiment of the present invention comprises: a housing; a bobbin disposed in the housing; a coil combined with the bobbin; a magnet placed in the housing and facing the coil; a base spaced apart from the bobbin; a lower elastic member combined with the bobbin and including first, second, third, and fourth elastic members disposed on the base; and a sensing coil disposed in the housing and generating an induced voltage by interacting with the coil. The corners of the base and housing form a combination area that the corners are coupled to each other, and the sensing coil includes a portion disposed outside the combination area.

Description

A lens driving device, and a camera module and optical device including the same TECHNICAL FIELD [0002] A LENS MOVING UNIT, AND CAMERA MODULE AND OPTICAL INSTRUMENT INCLUDING THE SAME}

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

Camera modules for ultra-compact and low power consumption are difficult to apply the technology of a voice coil motor (VCM) used in a conventional camera module, and related studies have been actively conducted.

Demand and production of electronic products such as smart phones and mobile phones equipped with cameras are increasing. Mobile phone cameras are trending toward higher pixel and smaller size, and accordingly, actuators are also becoming smaller, larger, and multifunctional. In order to implement a high-pixel mobile phone camera, additional functions such as improved performance of the mobile phone camera, auto focusing, improved shutter shake, and a zoom function are required.

The embodiment provides a sensing coil and a lens driving device capable of improving the ease of bonding work between each of the coils and an elastic member and simplifying the bonding work, and a camera module and an optical device including the same.

The lens driving apparatus according to the embodiment includes a housing; A bobbin disposed in the housing; A coil coupled to the bobbin; A magnet disposed in the housing and facing the coil; A base disposed to be spaced apart from the bobbin; A lower elastic member coupled to the bobbin and including a first elastic member, a second elastic member, a third elastic member, and a fourth elastic member disposed on the base; And a sensing coil disposed in the housing and generating an induced voltage by interaction with the coil, wherein a corner of the base and a corner of the housing form a coupling region to be coupled to each other, and the sensing coil is the coupling region Includes a part that is arranged on the outside of.

The coupling region may include a pillar portion protruding from a corner of the base toward the housing; And a groove formed at a corner of the housing and coupled to the pillar portion.

The coil may be electrically connected to the first and second elastic members, and the sensing coil may be electrically connected to the third and fourth elastic members.

The coil may have a ring shape surrounding an outer surface of the bobbin, and the sensing coil may have a ring shape surrounding a lower portion of the outer surface of the housing.

The sensing coil may include a portion overlapping with the magnet in the optical axis direction, and may not overlap with the coil in the optical axis direction.

Each of the first and second elastic members includes an inner frame coupled to a lower portion of the bobbin, one end of the coil is coupled to the inner frame of the first elastic member, and the other end of the coil is the second It may be coupled to the inner frame of the elastic member.

Each of the third and fourth elastic members includes an outer frame coupled to a lower portion of the housing, one end of the sensing coil is coupled to the outer frame of the third elastic member, and the other end of the sensing coil is the It may be coupled to the outer frame of the fourth elastic member.

Each of the first to fourth elastic members may include a terminal bent and extended to a first outer surface of the base.

The pillar portion of the base may be disposed inside the sensing coil.

The pillar portion of the base may be disposed outside the sensing coil.

The sensing coil may include a portion in contact with the outer surface of the pillar portion and overlapping the pillar portion in a direction perpendicular to the optical axis.

The sensing coil may include a portion in contact with the inner surface of the pillar portion and overlapping the pillar portion in a direction perpendicular to the optical axis.

The sensing coil may wrap a lower portion of an outer surface of the housing.

The embodiment can improve the ease of bonding between the sensing coil and each of the coil and the elastic member, and can simplify the bonding operation.

1 is an exploded perspective view of a lens driving apparatus according to an embodiment.
2 shows an assembly diagram of the lens driving device excluding the cover member.
3A is a perspective view of a bobbin.
3B is a diagram illustrating a combination of a bobbin and a coil.
4A shows a perspective view of the housing.
4B shows a perspective view of a housing, a sensing coil, and a magnet.
5A is a perspective view of a lower elastic member.
5B is a perspective view of the base.
5C is a perspective view of the base and the lower elastic member.
6 is a bottom perspective view of FIG. 2 with the base and sensing coil omitted.
7 is a plan view of FIG. 6.
8 is a bottom perspective view of FIG. 2 with the base omitted.
9 is a plan view of FIG. 8.
10 is a bottom perspective view of FIG. 2.
11A is a cross-sectional view in the AB direction of FIG. 2.
11B is a cross-sectional view in the CD direction of FIG. 2.
11C is a cross-sectional view in the CD direction of FIG. 2 according to another embodiment.
12 shows the assembly sequence of the lens driving device shown in FIG. 1.
13 is an exploded perspective view of a camera module according to an embodiment.
14 is a perspective view of a portable terminal according to an embodiment.
15 is a block diagram of the portable terminal shown in FIG. 14.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical idea of the present invention is not limited to some embodiments to be described, but may be implemented in various different forms, and within the scope of the technical idea of the present invention, one or more of the constituent elements may be selectively selected between the embodiments. It can be combined with and substituted for use.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention have meanings that can be generally understood by those of ordinary skill in the technical field to which the present invention belongs, unless explicitly defined and described. It can be interpreted as, and generally used terms such as terms defined in a dictionary may be interpreted in consideration of the meaning of the context of the related technology.

In addition, terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention. In the present specification, the singular form may also include the plural form unless specifically stated in the phrase, and when described as "at least one (or more than one) of A and (and) B and C", it is combined with A, B, C. It may contain one or more of all possible combinations.

In addition, terms such as first, second, A, B, (a), and (b) may be used in describing the constituent elements of the embodiment of the present invention. These terms are only for distinguishing the component from other components, and are not limited to the nature, order, or order of the component by the term.

And, when a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also the component and The case of being'connected','coupled' or'connected' due to another component between the other components may also be included. In addition, when it is described as being formed or disposed on the “top (top) or bottom (bottom)” of each component, the top (top) or bottom (bottom) is one as well as when the two components are in direct contact with each other. It also includes a case in which the above other component is formed or disposed between the two components. In addition, when expressed as "upper (upper) or lower (lower)", the meaning of not only an upward direction but also a downward direction based on one component may be included.

“Auto focusing” refers to automatically focusing the image of a subject on the image sensor surface. The lens driving apparatus according to the embodiment may perform an auto focusing operation to move an optical module including at least one lens in a first direction.

Hereinafter, the lens driving device may be referred to as a lens driving unit, a voice coil motor (VCM), or an actuator, and the term "coil" may be represented by replacing it with a coil unit, The term "elastic member" may be replaced by an elastic unit, or spring.

In addition, in the following description, "terminal" may be represented by replacing it with a pad, an electrode, a conductive layer, or a bonding part.

For convenience of description, the lens driving apparatus according to the embodiment is described using a Cartesian coordinate system (x, y, z), but may be described using other coordinate systems, and the embodiment is not limited thereto. In each drawing, the x-axis and y-axis mean a direction perpendicular to the z-axis, which is the optical axis direction, the z-axis direction, which is the optical axis (OA) direction, is called the'first direction', and the x-axis direction is called the'second direction'. And the y-axis direction may be referred to as a'third direction'.

FIG. 1 is an exploded perspective view of a lens driving apparatus 100 according to an exemplary embodiment, and FIG. 2 is a combined view of the lens driving apparatus 100 excluding the cover member 300.

1 and 2, the lens driving device 100 includes a bobbin 110, a coil 120, a magnet 130, a housing 140, a sensing coil 170, and elasticity. It may include a member.

In addition, the lens driving apparatus 100 may further include at least one of a cover member 300 and a base 210. The elastic member may include at least one of the upper elastic member 150 and the lower elastic member 160.

First, the cover member 300 will be described.

The cover member 300 accommodates the bobbin 110, the coil 120, the magnet 130, the housing 140, the elastic member, and the sensing coil 170 in an accommodation space formed together with the base 210.

The cover member 300 has an open lower portion and may be in a box shape including an upper plate 301 and side plates 302, and a lower end of the side plates 302 of the cover member 300 is a stepped portion of the base 210 Can be combined with (211). When viewed from the top, the shape of the upper plate 301 of the cover member 300 may be a polygon, for example, a square or an octagon.

The upper plate 301 of the cover member 300 may be provided with an opening (or a hollow) for exposing a lens (not shown) coupled to the bobbin 110 to external light.

The material of the cover member 300 may be a non-magnetic material such as SUS to prevent sticking to the magnet 130, but may be formed of a magnetic material to function as a yoke.

The cover member 300 may include at least one protrusion 31 extending from a region adjacent to the opening formed in the upper plate 301 in the direction of the upper surface of the bobbin 110.

At least one protrusion 31 of the cover member 300 may be disposed or inserted into a groove 119 provided on an upper surface of the bobbin 110. For example, at least one protrusion 31 of the cover member 300 may function as a yoke.

In addition, when driving the AF, the protrusion 31 of the cover member 300 may come into contact with the bottom surface of the groove 119 of the bobbin 110, and the protrusion 31 allows the bobbin 110 to move upward. It can also act as a stopper to limit within a set range.

Next, the bobbin 110 will be described.

3A is a perspective view of the bobbin 110 shown in FIG. 1, and FIG. 3B is a diagram illustrating a combination of the bobbin 110 and the coil 120.

3A and 3B, the bobbin 110 is disposed in the housing 140, and in a direction parallel to the optical axis OA or parallel to the optical axis by electromagnetic interaction between the coil 120 and the magnet 130. You can move.

The bobbin 110 may have an opening or a hollow for mounting a lens or a lens barrel. The shape of the opening (or hollow) of the bobbin 110 may match the shape of the lens or lens barrel to be mounted, and may be, for example, a circle, an ellipse, or a polygon, but is not limited thereto. For example, the opening of the bobbin 110 may be in the form of a hole penetrating the bobbin 110 in the optical axis direction.

A lens or a lens module may be directly coupled to the inner surface of the bobbin 110, but is not limited thereto. For example, the bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed therein, and the lens barrel may be coupled to the inner surface of the bobbin 110 in various ways. For example, a thread for coupling with a lens or a lens module may be formed on the inner surface of the bobbin 110, but the present invention is not limited thereto, and in other embodiments, a thread may not be formed.

At least one first coupling portion 113 for coupling and fixing to the inner frame 151 of the upper elastic member 150 may be provided on an upper surface, an upper portion, or an upper end of the bobbin 110.

At least one second coupling portion 117 for coupling and fixing to the inner frame 161 of the lower elastic member 160 may be provided at a lower surface, a lower portion, or a lower portion of the bobbin 110.

For example, in FIGS. 3A and 3B, each of the first coupling portion 113 and the second coupling portion 117 of the bobbin 110 has a protrusion shape, but is not limited thereto, and in other embodiments, the first coupling portion 113 and the second coupling portion 117 At least one of the first and second coupling portions may have a coupling groove or a flat shape.

A first escape groove 112a may be provided in a region of the upper surface of the bobbin 110 corresponding to or aligned with the first frame connection part 153 of the upper elastic member 150.

In addition, a second escape groove 112b may be provided in a region of the lower surface of the bobbin 110 corresponding to or aligned with the second frame connection portion 163 of the lower elastic member 160.

When the bobbin 110 is moved in the first direction, the first and second frame connection portions 153 and 163 and the bobbin are formed by the first and second escape grooves 112a and 112b of the bobbin 110. Spatial interference with each other of 110 may be avoided, and thus the first and second frame connecting portions 153 and 163 of the upper and lower elastic members 150 and 160 may be elastically deformed more easily.

In another embodiment, the first frame connection portion of the upper elastic member and the bobbin may be designed so as not to interfere with each other, and the bobbin may not have a first escape groove and/or a second escape groove.

At least one groove 105 for arranging the coil 120 may be provided on the outer surface of the bobbin 110. The coil 120 may be disposed or seated in the groove 105 of the bobbin 110.

For example, the coil 120 may be disposed in the groove 105 of the bobbin 110 to rotate in a clockwise or counterclockwise direction with respect to the optical axis OA, or may be wound directly on the groove 105.

The shape and number of the grooves 105 of the bobbin 110 may correspond to the shape and number of coils disposed on the outer surface of the bobbin 110. In another embodiment, the bobbin 110 may not have a groove for seating the coil, and the coil 120 is disposed on the outer surface of the bobbin 110 without the groove or directly wound on the outer surface of the bobbin 110 It becomes and can be wound up.

A groove 106 for passing a line of sight (eg, one end) or a vertical line (eg, the other end) of the coil 120 may be formed at the lower end of the outer surface of the bobbin 110.

Next, the coil 120 will be described.

The coil 120 may be disposed on the bobbin 110, coupled to or connected to the bobbin 110, or supported by the bobbin 110.

For example, the coil 120 may be disposed on the outer surface of the bobbin 110, and electromagnetic force is generated by the interaction between the magnet 130 disposed on the housing 140 and the coil 120 disposed on the bobbin 120. Can occur. Power may be provided to the coil 120 or a driving signal may be applied to the coil 120 to generate an electromagnetic force due to interaction with the magnet 130.

In order to generate an induced voltage by mutual induction with the sensing coil 170, the driving signal provided to the coil 120 may include an AC signal or an AC signal and a DC signal.

For example, the AC signal provided to the coil 120 may be a sine wave or a pulse signal (eg, a PWM signal). For example, the driving signal may be in the form of current or voltage.

For example, the DC signal of the driving signal may move the AF movable part in the direction of the optical axis by interaction with the magnet. In addition, the AC signal of the driving signal is used to generate an induced voltage due to the interaction with the sensing coils 170. It may be provided, but is not limited thereto.

The bobbin 110 elastically supported by the upper and lower elastic members 150 and 160 due to an electromagnetic force caused by an interaction between the coil 120 and the magnet 130 may move in the optical axis direction or the first direction.

By controlling the driving signal provided to the coil 120, it is possible to control the movement or movement of the bobbin 110 in the first direction, thereby performing an auto-focusing function.

The coil 120 may be disposed to surround the outer surface of the bobbin 110 so as to rotate clockwise or counterclockwise around the optical axis. For example, the coil 120 may be disposed or wound in the groove 105 provided on the outer surface of the bobbin 110.

For example, the coil 120 may have a closed curve or a ring shape.

In another embodiment, the coil 120 may be implemented in the form of a coil ring wound in a clockwise or counterclockwise direction around an axis perpendicular to the optical axis, and the number of coil rings may be the same as the number of magnets 130. , But is not limited thereto.

The coil 120 may be electrically connected to at least one of the upper or lower elastic members 150 and 160. A driving signal may be applied to the coil 120 through at least one of the upper or lower elastic members 150 and 160.

For example, the coil 120 may be connected or coupled to any two elastic members 160-1 and 160-2 of the lower elastic member 160, and the two elastic members 160-1 and 160- A driving signal may be provided to the coil 120 through 2).

Next, the housing 140 will be described.

4A shows a perspective view of the housing 140 shown in FIG. 1, and FIG. 4B shows a perspective view of the housing 140, the sensing coil 170, and the magnet 130.

4A and 4B, the housing 140 supports the magnet 130 and accommodates the bobbin 110 inside so that the bobbin 110 can move in the first direction.

The housing 140 may have a hollow column shape as a whole.

The housing 140 may have an opening (or hollow) for accommodating the bobbin 110, and the opening of the housing 140 may be a through hole passing through the housing 140 in the optical axis direction.

The housing 140 may include side portions 141-1 to 141-4, or “first sides”) and corner portions 142-1 to 142-4, or “second sides”).

For example, the housing 140 includes a plurality of side portions 141-1 to 141-4 and corner portions 142-1 to 142-4 forming a polygonal (eg, square or octagonal) or circular opening can do. At this time, the corner portions of the housing 140 may be expressed as “columns”.

For example, the side portions 141-1 to 141-4 of the housing 140 may be disposed at positions corresponding to the side plates 302 of the cover member 300, and the side portions of the housing 140 corresponding to each other The side plate 302 of the cover member 300 may be parallel.

For example, the side portions 141-1 to 141-4 of the housing 140 may be portions corresponding to the sides of the housing 140, and the corner portions 142-1 to 142-4 of the housing 140 are It may be a part corresponding to the corner of the housing 140.

The inner surface of each of the corner portions 142-1 to 142-4 of the housing 140 may be a flat surface, a chamfer, or a curved surface.

A magnet 130 may be disposed or installed on at least one of the side portions 141-1 to 141-4 of the housing 140. For example, the first to fourth side portions 141-1 to 141-4 of the housing 140 are provided with a seating portion 141a on which the magnets 130-1 to 130-4 are seated, arranged, or fixed. Can be.

In FIG. 4A, the seating portion 141a may be in the form of an opening or a through hole penetrating the side portions 141-1 to 141-4 of the housing 140, but is not limited thereto, and in another embodiment, a groove or a groove shape May be.

The housing 140 may include a support portion 18 adjacent to the seating portion 141a to support the edge of the first surface of the magnet 130 facing the coil 120.

The support part 18 may be positioned adjacent to the inner surface of the housing 140 and may protrude in a horizontal direction with respect to the side surface of the seating part 141a. Also, for example, the support 18 may include a tapered portion or an inclined surface. In another embodiment, the housing 140 may not include the support 18.

Referring to FIG. 4B, the housing 140 may include a seating groove 41 for arranging or receiving the sensing coil 170 or winding.

The seating groove 41 may be provided under or at a lower portion of an outer surface of at least one of the side portions 141-1 to 141-4 and the corner portions 142-4 of the housing 140.

For example, the seating groove 41 may be formed at the lower or lower end of the outer surface of the side portions 141-1 to 141-4 of the housing 140.

For example, the seating groove 41 may be recessed from the outer surface of the side portions 141-1 to 141-4 of the housing 140 so as to be adjacent to the lower surface of the housing 140.

The depth of the seating groove 41 may be greater than or equal to the ring thickness of the sensing coil 170 to be wound. Here, the thickness of the ring of the sensing coil 170 may be a length in a direction perpendicular to the optical axis.

For example, the sensing coil 170 disposed in the mounting groove 41 may not protrude from the outer surfaces of the side portions 141-1 to 141-4 of the housing 140. This is to prevent the sensing coil 170 disposed in the seating groove 41 from being separated from the seating groove 141b. Alternatively, in another embodiment, the sensing coil 170 disposed in the mounting groove of the housing 140 may protrude from the outer surfaces of the side portions 141-1 to 141-4 of the housing 140.

The seating groove 41 may be provided under the seating portion 141a on which the magnet 130 is seated. For example, the mounting groove 41 may not overlap with the mounting portion 141a of the housing 140 in a direction perpendicular to the optical axis OA, but is not limited thereto.

For example, the seating groove 41 of the housing 140 may have an open lower portion, but is not limited thereto. In addition, the mounting groove 41 of the housing 140 may be open to the outer surfaces of the side portions 141-1 to 141-4 of the housing 140, but is not limited thereto.

For example, the mounting groove 41 of the housing 140 has a first opening that opens to the bottom surface of the housing 140 and a first opening that opens to the outer surfaces of the side portions 141-1 to 141-4 of the housing 140. It may include at least one of the two openings. The sensing coil 170 can be easily arranged or mounted in the housing by the first opening or/and the second opening of the mounting groove 41, and the sensing coil 170 is formed by the first opening of the mounting groove 41. Bonding for bonding to the lower elastic member 160 may be facilitated.

In another embodiment, the mounting groove of the housing may be spaced apart from the lower surface of the housing 140 in the optical axis direction.

The corner portions 142-1 to 142-4 of the housing 140 may include a first coupling region to be coupled to the corner of the base 210.

In addition, the corner of the base 210 may include a second coupling region for coupling with the first coupling region of the housing 140. The first coupling region may include at least one of a groove or a protrusion (or a pillar portion), and the second coupling region may include at least one of a groove or a protrusion (or a pillar portion).

For example, the first coupling region may be a groove, and the second coupling region may be a protrusion (or pillar), but the present invention is not limited thereto, and vice versa. Alternatively, the first coupling region may include a first groove and a first protrusion (or a first pillar), and the second coupling region is a second protrusion to be coupled with the first groove of the first coupling region, and a first It may include a second groove for engaging the first projection of the coupling region.

The first coupling region and the second coupling region described above may form a coupling region for coupling the housing 140 and the base 210.

For example, a guide groove for inserting, fastening, or coupling the pillar portions (eg, 216a to 216d) of the base 210 to the lower part of the outer surface of the corner portions 142-1 to 142-4 of the housing 140 ( 148) (or “groove”) may be provided.

At this time, the pillar portions (eg, 216a to 216d) of the base 210 and the groove 148 of the housing 140 may form a coupling region.

In order to prevent the cover member 300 from directly colliding with the inner surface of the upper plate 301, the housing 140 may include a stopper 143 formed on the upper surface, the upper surface or the upper surface of the housing 140. Here, the stopper 143 may be represented by replacing it with “protrusion” or “protrusion”.

For example, the stopper 143 may be formed on the corner portions 142-1 to 142-4 of the housing 140, but is not limited thereto, and in another embodiment, the stopper 143 is a side portion of the housing 140 It may be formed in at least one of the s 141-1 to 141-4 and the corner portions 142-1 to 142-4.

For example, the upper surface of the stopper 143 of the housing 140 may contact the inner surface of the upper plate 301 of the cover member 300, but is not limited thereto. In other embodiments, both may not be in contact.

In addition, at least one first coupling portion 144 for coupling the outer frame 152 of the upper elastic member 150 may be provided on an upper surface, an upper end, or an upper portion of the housing 140. In addition, at least one second coupling portion 147 for coupling the outer frame 162 of the lower elastic member 160 may be provided at a lower surface, a lower portion, or a lower portion of the housing 140.

4A and 4B, each of the first and second coupling portions 144 and 147 of the housing 140 has a protrusion shape, but is not limited thereto, and in other embodiments, the first and second coupling portions 144 and 147 ) At least one may have a groove or a flat shape.

For example, the guide groove 148 of the housing 140 and the pillar portion (eg, 216a to 216d) of the base 210 may be coupled by an adhesive (not shown) such as silicone or epoxy, and the housing 140 It may be combined with the base 210.

Next, the magnet 130 will be described.

At the initial position of the AF movable unit (eg, the bobbin 110), the magnet 130 may be disposed on the sides 141-1 to 141-4 of the housing 140 to correspond to or face the coil 120.

Here, the initial position of the AF movable unit (for example, the bobbin 110) is the initial position of the AF movable unit in a state in which no power or driving signal is applied to the coil 120, or the upper and lower elastic members 150 and 160 are only the AF movable units As it is elastically deformed only by the weight of the AF, it may be the position where the AF movable part is placed.

In addition, the initial position of the AF movable unit (eg, bobbin 110) is when gravity acts from the bobbin 110 to the base 210, or vice versa, when the gravity acts from the base 210 to the bobbin 110. It may be a position where the AF movable part of the is placed.

For example, the AF movable unit may include components mounted on the bobbin 110 and the bobbin 110. For example, the AF movable unit may include a bobbin 110 and a coil 120, and when a lens or a lens barrel is mounted, may include this.

According to the embodiment, by the interaction between the coil 120 and the magnet 130, the AF movable unit may perform bidirectional driving in which the AF movable unit can move forward (or upper) and rear (or lower) at the initial position of the AF movable unit. Alternatively, in another embodiment, by the interaction between the coil 120 and the magnet 130, the AF movable part may be unidirectionally driven in which the AF movable part can only move forward (or upward) at the initial position of the AF movable part.

At the initial position of the AF movable part, the magnet 130 may be disposed on the seating part 141a of the housing 140 to overlap the coil 120 in a second or third direction perpendicular to the optical axis direction.

In another embodiment, the mounting portions 141a may not be formed on the side portions 141-1 to 141-4 of the housing 140, and the magnet 130 may be formed on the side portions 141-1 to 141-4 of the housing 140. 141-4) may be disposed on the outer side or the inner side.

In the embodiment, the magnet 130 includes first to fourth magnets 130-1 to 130-4 disposed on the first to fourth side portions 141-1 to 1 141-4 of the housing 140. Including, but not limited to this, the number of magnets 130 may be two or more. For example, another embodiment may include two magnets disposed on two sides of the housing 140 facing each other.

Each of the magnets 130-1 to 130-4 has a shape corresponding to the outer surface of the side portions 141-1 to 141-4 of the housing 140, for example, a polyhedron (eg, a rectangular parallelepiped) shape as a whole. It may have, but is not limited thereto.

In another embodiment, the magnet 130 may be disposed on at least one of the corner portions of the housing 140, and at this time, a seating portion for arranging the magnet may be formed at the corner portion.

Each of the magnets 130-1 to 130-4 may be a single-pole magnetized magnet having two different polarities and an interface naturally formed between the different polarities.

For example, each of the magnets 130-1 to 130-4 may be a single-pole magnetized magnet disposed such that a first surface facing the coil 120 is an N pole, and a second surface opposite to the first surface is an S pole. However, it is not limited thereto, and the N pole and the S pole may be opposite.

In another embodiment, in order to improve the electromagnetic force, each of the magnets 130-1 to 130-4 may be an anode magnetized magnet divided into two in a direction perpendicular to the optical axis. At this time, each of the magnets 130-1 to 130-4 may be implemented with ferrite, alnico, rare earth magnets, etc., but is not limited thereto.

When the magnets 130-1 to 130-4 are positively magnetized, each of the magnets 130-1 to 130-4 is a first magnet part, a second magnet part, and a first magnet part and a second magnet part. It may include a partition wall disposed between.

The first magnet portion may include an N-pole, an S-pole, and a first interface between the N-pole and the S-pole. In this case, the first interface may include a section having almost no polarity as a part that does not substantially have magnetism, and may be a part naturally generated to form a magnet composed of one N pole and one S pole.

The second magnet portion may include an N-pole, a S-pole, and a second interface between the N and S poles. In this case, the second interface may include a section having almost no polarity as a part that does not substantially have magnetism, and may be a part naturally generated to form a magnet composed of one N pole and one S pole.

The partition wall separates or isolates the first magnet portion and the second magnet portion, and may be a portion substantially having no magnetic properties and almost no polarity. For example, the partition wall may be a non-magnetic material or air. For example, the partition wall may be expressed as a "Neutral Zone" or a "Neutral Zone".

The partition wall is a portion artificially formed when magnetizing the first magnet portion and the second magnet portion, and the width of the partition wall may be greater than the width of each of the first and second boundary surfaces. Here, the width of the partition wall may be a length of the partition wall in a direction from the first magnet part to the second magnet part.

The first surface of each of the magnets 130-1 to 130-2 may be formed as a flat surface, but is not limited thereto, and the first surface of each of the magnets 130-1 to 130-2 is a curved surface or an inclined surface , Or may include a tapered portion. For example, the first surface of each of the magnets 130-1 to 130-4 may be an outer surface of the bobbin 110 or/and a surface facing the coil 120.

Next, the upper elastic member 150 and the lower elastic member 160 will be described.

5A is a perspective view of the lower elastic member 160, FIG. 5B is a perspective view of the base 210, and FIG. 5C is a perspective view of the base 210 and the lower elastic member 160.

2 and 5A to 5C, the upper elastic member 150 and the lower elastic member 160 are coupled to the bobbin 110 and the housing 140, and elastically support the bobbin 110.

For example, the upper elastic member 150 may be coupled to the upper (or upper surface, or upper end) of the bobbin 110 and/or the upper (or upper surface, or upper end) of the housing 140.

The lower elastic member 160 may be coupled to a lower (or lower or lower) portion of the bobbin 110 and/or to a lower (or lower or lower) portion of the housing 140.

In FIG. 2, the upper elastic member 150 is not separated into a plurality, but is not limited thereto. In another embodiment, the upper elastic member 150 may include a plurality of elastic units spaced apart from each other.

Referring to FIG. 2, the upper elastic member 150 includes a first inner frame 151 coupled to an upper portion of the bobbin 110, a first outer frame 152 coupled to an upper portion of the housing 140, and a first It may include a first frame connector 153 connecting the inner frame 151 and the second outer frame 152. Hereinafter, the inner frame may be represented by replacing it with "inner part", the outer frame may be represented by replacing it with "outer part", and the frame connection part may be represented by replacing it with "connecting part".

The first inner frame 151 of the upper elastic member 150 may be provided with a hole 151a for coupling with the first coupling portion 113 of the bobbin 110, and the first outer frame 152 has a housing A hole 152a for coupling with the first coupling portion 144 of 140 may be provided.

Referring to FIG. 5A, the lower elastic member 160 may include elastic members divided or separated into two or more, and may be coupled to the bobbin 110. For example, elastic members may be expressed as “lower elastic members”, “elastic units” or “springs”.

For example, the lower elastic member 160 may include first to fourth elastic members 160-1 to 160-4 spaced apart from each other, and the first to fourth elastic members 160-1 to 160- 4) can be electrically separated from each other.

At least one of the first to fourth elastic members 160-1 to 160-4 is a second inner frame 161-1 to 161-4 coupled to the lower portion of the bobbin 110, and the lower portion of the housing 140 A second outer frame (162-1 to 162-4) coupled to the second, and a second connecting the second inner frame (161-1 to 161-4) and the second outer frame (162-1 to 162-4) A frame connection part 163 may be included.

For example, the coil 120 may be electrically connected to the first and second elastic members 160-1 and 160-2. For example, one end (or first end) of the coil 120 may be coupled to the first elastic member 160-1, and the other end (or second end) of the second coil 120 is a second elastic member ( 160-2) can be combined.

Holes 161a for coupling with the second coupling portion 117 of the bobbin 110 may be provided in the second inner frames 161-1 to 161-4, and the second outer frames 162-1 to 162 A hole 162a for coupling with the second coupling portion 147 of the housing 140 may be provided in -4).

For example, at one end of the second inner frame 161-1 of the first elastic member 160-1, a first bonding portion 15a or “first bonding region” to which one end of the coil 120 is coupled is provided. May be provided, and at one end of the second inner frame 161-2 of the second elastic member 160-2, a second bonding portion 15b for coupling the other end of the coil 120, or a “second bonding region” ") can be provided.

For example, by soldering or a conductive adhesive member, one end of the coil 120 may be coupled to the first bonding portion 15a of the inner frame 161 of the first elastic member 160-1, and the coil 120 The other end of may be coupled to the second bonding portion 15b of the inner frame 161 of the second elastic member 160-2.

In addition, for example, at one end of the second outer frame 162-3 of the third elastic member 160-3, a first bonding portion 16a or a first bonding region to which one end of the sensing coil 170 is coupled is provided. A second bonding portion 16b (second bonding area) for coupling the other end of the sensing coil 170 to one end of the second outer frame 162-4 of the fourth elastic member 160-4 Can be provided.

The reasons why the first and second bonding portions 15a and 15b of the first and second elastic members 160-1 and 160-2 are provided in the second inner frames 161-1 and 161-2 are the first and The second inner frames 161-1 and 161-2 of the second elastic members 160-1 and 160-2 are the second outer frames of the first and second elastic members 160-1 and 160-2 ( Since it is closer to the bobbin 110 than the 162-1 and 162-2, this is to facilitate bonding with the coil 120.

In addition, the reason why the first and second bonding portions 16a and 16b of the third and fourth elastic members 160-3 and 160-4 are provided on the second outer frames 162-3 and 162-4 is The second outer frames 162-3 and 162-4 of the third and fourth elastic members 160-3 and 160-4 are formed of the third and fourth elastic members 160-3 and 160-4. This is to facilitate bonding with the sensing coil 170 because it is closer to the housing 140 than the second inner frames 161-3 and 161-4.

For example, the first and second bonding portions 15a, 15b, 16a, 16b of the first to fourth elastic members 160-1 to 160-4 have one end of the coil 120 and the sensing coil 170, and A guide groove for guiding the other end may be provided.

For the above-described first and second bonding portions 15a, 15b, 16a, and 16b, the term "bonding portion" may be used as a pad portion, a connection terminal portion, a solder portion, or an electrode portion.

The upper elastic member 150 and the lower elastic member 160 may be implemented as a leaf spring, but are not limited thereto, and may be implemented as a coil spring or a suspension wire.

Each of the first and second frame connecting portions 153 and 163 may be formed to be bent or curved (or curved) at least one or more times to form a pattern having a predetermined shape. The bobbin 110 may be elastically (or elastically) supported by an upward and/or downward motion of the bobbin 110 in the first direction through a change in position and fine deformation of the first and second frame connection parts 153 and 163.

For example, in order to prevent oscillation when the bobbin 110 moves, a damper (eg, the first escape groove 112a) between the first frame connection portion 153 of the upper elastic member 150 and the upper surface of the bobbin 110 damper) can be arranged. Alternatively, a damper (not shown) may be disposed between the second frame connecting portion 163 of the lower elastic member 160 and the lower surface of the bobbin 110 (eg, the second escape groove 112b).

Or, for example, a damper may be applied to the coupling portion of the bobbin 110 and the housing 140 and the upper elastic member 150, or the coupling portion of the bobbin 110 and the housing 140 and the lower elastic member 160, respectively. I can. For example, the damper may be a gel-like silicone.

For example, the first to fourth elastic members 160-1 to 160-4 may be separated or spaced apart from each other at the side portions 141-1 to 141-4 of the housing 140, but are not limited thereto.

The first elastic member 160-1 is connected to the outer surface of the second outer frame 162-1 of the first elastic member 160-1, and the second outer frame of the first elastic member 160-1 The first terminal 64-1 may be bent and extended in a direction toward the base 210 at (162-1).

In addition, the second elastic member 160-2 is connected to the outer surface of the second outer frame 162-2 of the second elastic member 160-2, and is connected to the second outer side of the second elastic member 160-2. It may include a second terminal 64-2 that is bent and extended in a direction from the frame 162-2 toward the base 210.

In addition, the third elastic member 160-3 is connected to the outer surface of the second outer frame 162-3 of the third elastic member 160-3, and the second outer side of the third elastic member 160-3 It may include a third terminal 64-3 that is bent and extended in a direction from the frame 162-3 toward the base 210.

In addition, the fourth elastic member 160-4 is connected to the outer surface of the second outer frame 162-4 of the fourth elastic member 160-4, and the second outer side of the fourth elastic member 160-4 It may include a fourth terminal 64-4 which is bent and extended in a direction from the frame 162-4 toward the base 210.

For example, the first terminal 64-1 of the first elastic member 160-1 is a first outer surface of the base 210 in the second outer frame 162-1 of the first elastic member 160-1 Can be extended to 218.

Also, for example, the second terminal 64-2 of the second elastic member 160-2 is outside the first of the base 210 in the second outer frame 162-2 of the second elastic member 160-2. It may extend to the side 218.

In addition, for example, the third terminal 64-3 of the third elastic member 160-3 is outside the first of the base 210 in the second outer frame 162-3 of the third elastic member 160-3. It may extend to the side 218.

For example, the third elastic member 160-3 includes a 2-1 outer frame coupled to a second corner portion of the housing 140, a 2-2 outer frame coupled to a third corner portion of the housing 140, A first connection frame 164A connecting the 2-1 outer frame and the 2-2 outer frame, and a first connecting frame 164A extending from one end of the 2-1 outer frame to the first outer surface 218 of the base 210 It may include three terminals 64-3.

For example, the first bonding portion 16a of the third elastic member 160-3 may be provided on the outer frame 2-1 of the third elastic member 160-3.

In addition, for example, the fourth terminal 64-4 of the fourth elastic member 160-4 is outside the first of the base 210 in the second outer frame 162-4 of the fourth elastic member 160-4. It may extend to the side 218.

For example, the fourth elastic member 160-3 includes a 2-3rd outer frame coupled with a first corner portion of the housing 140, a 2-4th outer frame coupled with a fourth corner portion of the housing 140, A second connection frame 164B connecting the 2-3rd outer frame and the 2-4th outer frame, and a first extending from one end of the 2-3rd outer frame to the first outer surface 218 of the base 210 It may include 4 terminals 64-4.

For example, the second bonding portion 16b of the fourth elastic member 160-4 may be provided on the 2-3rd outer frame of the fourth elastic member 160-4.

For example, the first to fourth terminals 64-1 to 64-4 of the first to fourth elastic members 160-1 to 160-4 are on the first outer surface 218 of the base 210. They may be disposed to be spaced apart from each other, and may be in contact with the first outer surface 218 of the base 210.

For example, the first and fourth terminals 64-1 and 64-4 of the first and fourth elastic members 160-1 and 160-4 are on the first outer surface 218 of the base 210. It may be disposed, seated, or inserted into the prepared first recessed portion 52a. In addition, the second and third terminals 64-2 and 64-3 of the second and third elastic members 160-2 and 160-3 are provided on the first outer surface 218 of the base 210. It may be disposed, seated, or inserted into the second recessed portion 52b. Here, the depression may be represented by replacing it with "groove".

The first to fourth terminals 64-1 to 64-4 of the first to fourth elastic members 160-1 to 160-4 may be exposed from the base 210, and the first to fourth terminals are The terminals 64-1 to 64-4 may be electrically separated from each other.

For example, the inner surface of the first and fourth terminals 64-1 and 64-4 disposed in the first depression 52a of the base 210 is one surface of the first depression 52a (eg, the bottom Surface), and the outer surfaces of the first and fourth terminals 64-1 and 64-4 may be exposed from the outer surface (eg, the first outer surface) of the base 210. The outer surfaces of the first and fourth terminals 64-1 and 64-4 may be opposite to the inner surfaces of the first and fourth terminals 64-1 and 64-4.

In addition, the inner side of the second and third terminals 64-2 and 64-3 disposed in the second depression 52b of the base 210 is one surface (eg, the bottom surface) of the second depression 52b. ), and outer surfaces of the second and third terminals 64-2 and 64-3 may be exposed from an outer surface (eg, a first outer surface) of the base 210. The outer surfaces of the second and third terminals 64-2 and 64-3 may be opposite to the inner surfaces of the second and third terminals 64-2 and 64-3.

For example, the lower end of each of the first to fourth terminals 64-1 to 64-4 may be exposed from the lower surface of the base 210, but is not limited thereto, and in another embodiment, the first to second terminals The lower ends of each of the elements 64-1 to 64-4 may not be exposed to the lower surface of the base 210.

The depth of the depressions 52a and 52b may be greater than the thickness of the terminals 64-1 to 64-4, and the outer surfaces of the terminals 64-1 to 64-4 disposed in the depressions 52a and 52b May not protrude out of the recessed portions 52a and 52b, but are not limited thereto, and in another embodiment, the outer surfaces of the terminals 64-1 to 64-4 may protrude outside the recessed portions 52a and 52b. have.

Referring to FIGS. 4A and 5A to 5C, the base 210 includes side portions corresponding to or opposite to the side portions 141-1 to 141-4 of the housing 140 and corner portions 142 of the housing 140. -1 to 142-4) may include corners corresponding to or opposite to each other.

For example, the first elastic member 160-1 is disposed between one side of the first side of the base 210, one side of the third side of the base 210, and between the first side and the third side of the base 210 It may be disposed on the first corner portion of the base 210.

For example, the second elastic member 160-2 is disposed between the other side of the first side of the base 210, one side of the fourth side of the base 210, and the first side and the fourth side of the base 210 It may be disposed on the second corner of the base 210 to be formed.

For example, the third elastic member 160-3 is the other side of the first side of the base 210, the second corner, the fourth side of the base 210, one side of the second side of the base 210, And may be disposed on the third corner of the base 210. The third corner portion of the base 210 may be disposed between the second side and the fourth side of the base 210.

For example, the fourth elastic member 160-4 may be disposed on one side of the first side of the base 210, the first corner, the third side, the fourth corner, and the other side of the second side. have. The fourth corner portion of the base 210 may be disposed between the second side and the third side of the base 210.

For example, the first side and the second side of the base 210 may be located opposite to each other in the first axis direction (eg, the X axis direction) or may face each other. For example, the third side and the fourth side of the base 210 may be located opposite to each other or face each other in a second axis direction (eg, a Y axis direction) perpendicular to the first axis direction.

For example, the first to fourth terminals 64-1 to 164-4 may be disposed on an outer surface of the first side of the base 210.

For example, the first to fourth terminals 64-1 to 64-4 may be electrically connected to external wirings or external devices by a conductive adhesive member (eg, soldering).

For example, the first and second terminals 64-1 and 64-2 may receive power or a driving signal to be provided to the coil 120 from the outside, and the first and third terminals 64-3 , 64-4) may provide or transmit the output voltage of the sensing coil 170 to the outside.

If the solder bonded to the first to fourth terminals 64-1 to 64-4 protrudes outside the outer surface of the base 210, the first to fourth terminals 64-1 to 64 Contact or collision between the solder bonded to -4) and the cover member 300 may occur, and thus an electrical short or disconnection may occur. In the embodiment, the depth of the depressions 52a and 52b is sufficiently secured so that the solder bonded to the terminals 64-1 to 64-4 does not protrude out of the outer surface of the base 210, and the embodiment is Short circuit or disconnection can be prevented.

In addition, the first to fourth terminals 64-1 to 64-4 are of the first side portion 141-1 of the housing 140 or/and the housing 140 adjacent to the first side portion 141-1. In one area of the second outer frames 162-1 to 162-4 of the first to fourth elastic members 160-1 to 160-4 disposed under the corner portions 142-1 and 142-2 It can be provided or placed.

And the first bonding portion 15a of the first elastic member 160-1 to which one end of the coil 120 is coupled is a side portion of the bobbin 110 corresponding to the first side portion 141-1 of the housing 140 It may be formed at one end of the first inner frame 161-1 of the first elastic member 160-1 disposed below.

The second bonding portion 15b of the second elastic member 160-2 to which the other end of the coil 120 is coupled is below the side portion of the bobbin 110 corresponding to the first side portion 141-1 of the housing 140 It may be formed at one end of the first inner frame 161-2 of the second elastic member 160-2 disposed on the second elastic member 160-2.

In addition, the first bonding portion 16a of the third elastic member 160-3 to which one end of the sensing coil 170 is coupled is a third elastic member coupled to the second corner portion 142-2 of the housing 140 It may be formed at one end of the second outer frame 163-3 of (160-3).

The second bonding portion 16b of the fourth elastic member 160-4 to which the other end of the sensing coil 170 is coupled is a fourth elastic member coupled to the first corner portion 142-1 of the housing 140 ( It may be formed at one end of the second outer frame 163-4 of 160-4).

For the first to fourth terminals 64-1 to 64-4 described above, the term "terminal" may be used as a pad part, a bonding part, a solder part, or an electrode part.

The first and second terminals 64-1 and 64-2 of the first and second elastic members 160-1 and 160-2 may be electrically connected to the coil 120, and the first and second Power or a driving signal for driving the coil 120 may be provided to the 2 terminals 64-1 and 64-2.

In addition, the third and fourth terminals 64-3 and 64-4 of the third and fourth elastic members 160-3 and 160-4 may be electrically connected to the sensing coil 170, and may be The induced voltage of the sensing coil 170 may be output through the 4 terminals 64-3 and 64-4.

5A and 5B, the first terminal 64-1 is formed integrally with the first elastic member 160-1, and the second terminal 64-2 is integrally formed with the second elastic member 160-2. And the third terminal 64-3 is formed integrally with the third elastic member 160-3, and the fourth terminal 64-4 is formed integrally with the fourth elastic member 160-4 However, it is not limited thereto.

In another embodiment, at least one of the first to fourth terminals may be disposed on the first outer surface of the base 210 in a separate configuration from at least one of the first to fourth elastic members, and a conductive adhesive (for example, , Solder) may be connected to each other.

For example, each of the first to fourth terminals may be configured separately from each of the first to fourth elastic members, and each of the first to fourth terminals is formed by a conductive adhesive (eg, solder). It may be connected to a corresponding one of the four elastic members.

Next, the base 210 will be described.

The base 210 may be coupled to the housing 140 and may form a space for accommodating the bobbin 110 and the housing 140 together with the cover member 300. The base 210 may have an opening 21 corresponding to the opening of the bobbin 110 or/and the opening of the housing 140, and has a shape that matches or corresponds to the cover member 300, for example, a square shape. Can be

When the cover member 300 is adhesively fixed, the base 210 may have a stepped step 211 at the lower end of the outer surface of the base 210 to which the adhesive may be applied. In this case, the stepped jaw 211 may guide the cover member 300 coupled to the upper side, and may face the lower end of the side plate 302 of the cover member 300. An adhesive member or/and a sealing member may be disposed or applied between the lower end of the side plate 302 of the base 210 and the stepped portion 211 of the base 210.

The base 210 may be disposed under the bobbin 110 and the housing 140.

For example, the base 210 may be disposed under the lower elastic member 160.

Pillar portions 216a to 216d protruding toward the housing 140 may be formed on the upper surface 210A of the base 210.

The base 210 may include pillar portions 216a to 216d protruding at a predetermined height upward from each of the corners or corner portions. Here, the pillar portions 216a to 216d of the base 210 may be represented by replacing them with “protrusions”.

For example, the pillar portions 216a to 216d of the base 210 may have a polygonal pillar shape protruding from the upper surface 210A of the base 210 so as to be perpendicular to the upper surface 210A of the base 210, but is limited thereto. It is not.

The pillar portions 216a to 216d of the base 210 may be inserted, fastened, or coupled to the guide groove 148 of the housing 140 by an adhesive member such as epoxy or silicone.

The pillar portions 216a to 216d of the base 210 and the guide groove 148 of the housing 140 may form the aforementioned coupling region. In addition, the bonding region may further include an adhesive member such as epoxy or silicone for bonding the pillar portions 216a to 216d and the guide groove 148.

In order to prevent the lower surface or the lower end of the bobbin 210 from directly colliding with the upper surface of the base 210 when an external impact occurs, the base 210 may be provided with a stopper 23 protruding from the upper surface, and the base 210 ) Of the stopper 23 may be disposed corresponding to the pillar portions 216a to 216d of the base 210, but is not limited thereto.

In order to avoid spatial interference between the bobbin 110 and the lower elastic member 160, the stopper 23 of the base 210 includes elastic members 160-1 to 160-4 (for example, It may be positioned higher than the second frame connector 163.

In addition, the upper surface 210A of the base 210 may be provided with a groove 247 for seating, inserting, or coupling the second coupling portion 147 of the protruding housing 140, at this time, the groove 247 May correspond to or be opposed to the second coupling portion 147 of the housing 140 in the optical axis direction, and the base 210 positioned between the pillar portions 216a to 216d of the base 210 and the stopper 23 It may be formed in one area of the upper surface.

For example, first and second depressions 52a and 52b may be formed on the outer surface 218 of the first side of the base 210.

For example, each of the first and second depressions 52a and 52b may include an upper opening open to the upper surface of the base 210 and a lower opening open to the lower surface of the base 210.

Referring to FIG. 10, a seating groove 29 or a groove for seating the filter 610 of the camera module 200 may be formed on a lower surface or a lower portion of the base 210.

Next, the sensing coil 170 will be described.

The sensing coil 170 is located under the coil 120 and is disposed in the housing 140.

For example, the sensing coil 170 may be positioned higher than the upper surface of the base 210. In addition, the sensing coil 170 may be positioned lower than the upper surface of the pillar portions 216a to 216d of the base 210.

6 is a bottom perspective view of FIG. 2 in which the base 210 and the sensing coil 170 are omitted, FIG. 7 is a plan view of FIG. 6, and FIG. 8 is a bottom perspective view of FIG. 2 with the base 210 omitted, and FIG. 9 is a plan view of FIG. 8, FIG. 10 is a bottom perspective view of FIG. 2, FIG. 11A is a cross-sectional view in the AB direction of FIG. 2, and FIG. 11B is a cross-sectional view in the CD direction of FIG. 2.

The sensing coil 170 is for detecting the displacement of the AF movable part, and may output an induced voltage by the mutual induction action of the coil 120.

6 to 11B, the sensing coil 170 may be disposed under the magnet 130 disposed in the housing 140.

For example, the sensing coil 170 may overlap the magnet 130 in the optical axis direction.

For example, the sensing coil 170 may be disposed below the upper elastic member 150 with respect to the upper surface of the base 210. That is, the sensing coil 170 may be positioned closer to the upper surface of the base 210 than the upper elastic member 150.

For example, the sensing coil 170 may be disposed below the coil 120 based on the upper surface of the base 210. That is, the sensing coil 170 may be positioned closer to the upper surface of the base 210 than the coil 120.

For example, the sensing coil 170 may not overlap with the coil 120 in the optical axis direction, but is not limited thereto. In another embodiment, the sensing coil 170 has a portion overlapping with the coil 120 in the optical axis direction. Can include.

The sensing coil 170 may be disposed outside the first to fourth terminals 64-1 to 64-4 of the first to fourth elastic members 160-1 to 160-4, but is limited thereto. In another embodiment, the first to fourth terminals 64-1 to 64-4 may be located inside or may be disposed to overlap each other in the optical axis direction.

Also, for example, the sensing coil 170 may be disposed or positioned above the first to fourth terminals 64-1 to 64-4 of the first to fourth elastic members 160-1 to 160-4. I can.

Further, for example, the sensing coil 170 may be disposed outside the pillar portions 216a to 216d of the base 210. Accordingly, the length of the sensing coil 170 may be increased, and the number of revolutions (or the number of turns) of the sensing coil 170 for implementing a preset resistance value may be reduced. And as the number of rotations (or the number of turns) of the sensing coil 170 decreases, the area of the housing 140 required for mounting the sensing coil 170 may be reduced, and the housing 140 for arranging the magnet 130 The area of the can be increased, so that the size of the magnet that can be mounted on the housing 140 can be increased, and thus the electromagnetic force for driving the AF can be improved.

Also, the resistance value of the sensing coil 170 is affected according to the temperature change of the lens driving device. Due to the change in the resistance value of the sensing coil 170, the output of the sensing coil 170 (eg, a sensing current or an induced voltage) may be changed. Since the influence of the output of the sensing coil 170 caused by such a temperature change may cause a malfunction of AF driving, temperature compensation is required. By making the resistance of the sensing coil 170 equal to or higher than a preset resistance value (eg, 30Ω), such temperature compensation can be easily performed. In the embodiment, a sufficient resistance value of the sensing coil 170 may be implemented to facilitate temperature compensation with a small number of turns.

For example, the sensing coil 170 may contact the outer surfaces of the pillar portions 216a to 216d of the base 210. The sensing coil 170 may overlap the pillar portions 216a to 216d of the base 210 in a direction perpendicular to the optical axis.

For example, the base 210 may include a protrusion 215 protruding from an upper edge of the base 210. The upper surface of the protrusion 215 of the base 210 may be lower than the upper surface of the pillar portions 216a to 216d. For example, the protrusion 215 of the base 210 may be disposed or formed outside the pillar portions 216a to 216d of the base.

For example, the sensing coil 170 may be disposed between the protrusion 215 of the base 210 and the seating groove 41 of the housing 140.

The sensing coil 170 may include a portion disposed outside the coupling region between the corner portion of the housing 140 and the corner of the base 210 described above. For example, the corner portion of the sensing coil 170 may be disposed outside the coupling region between the corner portion of the housing 140 and the corner of the base 210.

For example, the pillar portions 216a to 216d of the base 210 and the first to fourth elastic members 160-1 to 160-4 may be located inside the sensing coil 170.

Here, the inside of the sensing coil 170 may be the side where the center of the base 210 is located with respect to the sensing coil 170, and the outer side of the sensing coil 170 is the base 210 with respect to the sensing coil 170. ) May be on the opposite side of the side where the center is located.

The sensing coil 170 may contact the outer surface of the coupling region and may include a portion overlapping the coupling region in a direction perpendicular to the optical axis.

For example, the sensing coil 170 may contact the outer surfaces of the pillar portions 216a to 216d, and may include a portion overlapping the pillar portion in a direction perpendicular to the optical axis.

The sensing coil 170 may generate an induced voltage by mutual induction with the coil 120 provided with a driving signal.

The sensing coil 170 may be disposed to surround the lower portion of the outer surface of the housing 140.

The sensing coil 170 may have a closed curve, for example, a ring shape surrounding the lower portion of the outer surface of the side portions 141-1 to 141-4 of the housing 140. For example, the sensing coil 170 may have a ring shape wound so as to rotate clockwise or counterclockwise with respect to the optical axis OA.

For example, the coil 120 may include a ring portion having a circular, elliptical, or polygonal (eg, quadrangle, pentagonal, octagonal, etc.) shape. In addition, for example, the sensing coil 170 may include a ring portion having a circular, elliptical, or polygonal shape (eg, a square, a pentagon, an octagon, etc.).

For example, the ring portion of the sensing coil 170 in the optical axis direction may not overlap with the ring portion of the coil 120, but is not limited thereto, and in other embodiments, both may overlap.

The ring portion of the sensing coil 170 in the optical axis direction may at least partially overlap with the magnets 130-1 to 130-4, but is not limited thereto, and in other embodiments, both may not overlap in the optical axis direction. have.

The diameter of the ring portion of the sensing coil 170 may be larger than the diameter of the ring portion of the coil 120. For example, the outer diameter of the ring portion of the sensing coil 170 may be larger than the outer diameter of the bobbin 110 and may be larger than the outer diameter of the ring portion of the coil 120. In this case, the outer diameter of the ring portion may be the outer diameter of the ring portion.

In order to increase the AF driving force, the length in the optical axis direction of the coil 120 may be greater than the length in the optical axis direction of the sensing coil 170. In another embodiment, the length of the coil 120 in the optical axis direction may be equal to or smaller than the length in the optical axis direction of the first sensing coil.

The sensing coil 170 may be an AF movable unit, for example, an induction coil for detecting the position or displacement of the bobbin 110. For example, the sensing coil 170 may be implemented in the form of a wire, but is not limited thereto. In another embodiment, the sensing coil 170 may be implemented in the form of an FPCB or a fine pattern (FP) coil.

For example, when the AF movable unit is moved by the interaction between the coil 120 provided with the driving signal and the magnet 130, an induced voltage may be generated by the interaction between the coil 120 and the sensing coil 170.

The magnitude of the induced voltage of the sensing coil 170 may be based on the displacement of the AF movable part, and the induced voltage of the sensing coil 170 may be the third and third of the third and fourth elastic members 160-3 and 160-4. It can be output through 4 terminals 64-3 and 64-4.

The control unit 800 of the camera module 200 or the control unit 780 of the optical device 200A is induction provided through the third and fourth terminals 64-3 and 64-4 of the lens driving device 100 The displacement of the AF movable part may be sensed by using the voltage, and the AF feedback operation may be performed using the detected displacement of the AF movable part. Accordingly, the embodiment may perform an accurate AF operation.

In general, for AF (Auto Focus) feedback control, an AF moving part, for example, a position sensor capable of detecting the displacement of the bobbin (eg, a Hall sensor), and a separate power connection structure for driving the position sensor are provided. Because it is necessary, the cost of the lens driving device may increase and difficulty in manufacturing work may occur.

In addition, a linear section of the graph between the moving distance of the bobbin and the magnetic flux of the magnet detected by the position sensor (hereinafter referred to as “first linear section”) may be limited by the positional relationship between the magnet and the position sensor.

In the embodiment, since a separate position sensor for detecting the displacement of the bobbin 110 is not required, the cost of the lens driving device due to the reduction of parts can be reduced, the ease of manufacturing work can be improved, and a large diameter and It is advantageous for miniaturization.

In addition, since the embodiment does not include a Hall sensor and a sensing magnet corresponding thereto, there is no magnetic field interference between the sensing magnet and the driving magnet, thereby improving the tilt and resolving power characteristics of the lens driving apparatus. In addition, in a dual or higher camera module, the magnetic field interference caused by the sensing magnet between adjacent camera modules is not affected.

In addition, since the induced voltage by mutual induction between the coil 120 and the sensing coil 170 is used, the graph between the displacement of the bobbin 110 and the induced voltage of the sensing coils 170 is linear compared to the first linear section. The interval can be increased. Accordingly, in the embodiment, linearity of a wide section can be ensured, a process defect rate can be improved, and more accurate AF feedback control can be performed.

In addition, the first to fourth terminals 64-1 to 64-4 of the first to fourth elastic members 160-1 to 160-4 are disposed on any one outer surface 218 of the base 210 By doing so, it is possible to reduce the amount of soldering work and improve soldering convenience.

For example, the first and second terminals 64-1 and 64-2 may be disposed between the third and fourth terminals 64-3 and 64-4. In another embodiment, the third and fourth terminals may be disposed between the first and second terminals. In another embodiment, the first to fourth terminals may be arranged in various arrangement orders according to the design of the elastic members.

For example, the first to fourth terminals 64-1 to 64-4 may not protrude below the lower surface of the base 210, but are not limited thereto.

For example, in another embodiment, at least one part of the first to fourth terminals 64-1 to 64-4 may be exposed or protruded under the lower surface of the base 210. At this time, at least one part of the first to fourth terminals protruding below the lower surface of the base 210 may be coupled to the terminals of the circuit board 800 of the camera module 200 by soldering.

11C is a cross-sectional view in the CD direction of FIG. 2 according to another embodiment.

Referring to FIG. 11C, the sensing coil 170A may include a portion disposed inside the coupling region between the housing 140 and the base 210.

For example, the sensing coil 170A may include a portion disposed inside the pillar portions 216a to 216d of the base 210. For example, the corner of the sensing coil 170A may be disposed inside the pillar portions 216a to 216d.

For example, the corner or corner portion of the sensing coil 170A may be disposed in the groove 148 of the housing 140.

For example, the corner or corner portion of the sensing coil 170A may be disposed between the corner portion of the housing 140 and the pillar portion of the base 210. For example, the sensing coil 170A may have an octagonal shape, but is not limited thereto.

The sensing coil 107A may contact the inner surface of the coupling region between the corner portion of the housing 140 and the corner of the base 210, and the sensing coil 170A may overlap the coupling region in a direction perpendicular to the optical axis.

For example, the sensing coil 170A may contact the inner surface of the pillar portions 216a to 216d of the base 210. In a direction perpendicular to the optical axis, the sensing coil 170A may overlap the pillar portions 216a to 216d of the base 210.

In the embodiment of FIG. 11C, it is possible to prevent damage to the sensing coil 170A by colliding with the cover member 300 by the corner portion of the sensing coil 170A.

12 shows an assembly sequence of the lens driving apparatus 100 shown in FIG. 1.

In step (a) of FIG. 12, after mounting the bobbin 110 on which the coil 120 is mounted to the housing 140, the upper elastic member 150 is bonded to the bobbin 110 by thermal fusion or/and an adhesive. 1 The coupling part 113 and the first coupling part 144 of the housing 140 are combined.

Next, in step (b) of FIG. 12, after rotating the assembly in which step (a) is completed by 180 degrees, the lower elastic member 160 is bonded to the lower elastic member 160 by means of thermal fusion or/and an adhesive. ) And the second coupling portion 147 of the housing 140.

Next, in step (c) of FIG. 12, the sensing coil 170 is disposed or mounted in the mounting groove 41 of the housing 140. For example, the sensing coil 170 may be formed by directly winding the coil in the mounting groove 41 or attaching the coil block to the mounting groove 41 by using an adhesive.

Next, through a conductive adhesive or soldering, the coil 120 is coupled to the first and second bonding portions 64-1 and 64-2 of the first and second elastic members 160-1 and 160-2, The sensing coil 120 is coupled to the first and second bonding portions 64-3 and 64-4 of the third and fourth elastic members 160-3 and 160-4.

Next, in step (d) of FIG. 12, the cover member 300 is assembled from the lower side to the upper side of the assembly in which step (c) is completed.

Next, in step (e) of FIG. 12, the base 210 is assembled from the top to the bottom to the assembly in which step (d) is completed.

In step (c), since the coil 120 and the sensing coil 170 are coupled to the first to fourth elastic members through a single bonding process, the process can be easily and simplified.

If the sensing coil is coupled to the outer surface of the base, the AF coil mounted on the bobbin by the first soldering and the first and second elastic members are first coupled, and then the sensing coupled to the base by the second soldering. Since the coil and the third and fourth elastic members are coupled, the bonding process is complicated and not easy.

Meanwhile, the lens driving apparatus according to the above-described embodiment may be used in various fields, for example, a camera module or an optical device.

For example, the lens driving apparatus 100 according to the embodiment forms an image of an object in space by using reflection, refraction, absorption, interference, diffraction, etc., which are characteristics of light, and aims to increase the visual power of the eye, or It may be included in an optical instrument for the purpose of recording and reproducing an image by a lens, or for optical measurement, image propagation or transmission, and the like. For example, optical devices according to the embodiment include mobile phones, mobile phones, smart phones, portable smart devices, digital cameras, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), and portable multimedia players (PMPs). ), navigation, etc., but is not limited thereto, and any device for capturing an image or photo may be used.

13 is an exploded perspective view of the camera module 200 according to the embodiment.

13, the camera module includes a lens module 400, a lens driving device 100, an adhesive member 612, a filter 610, a circuit board 800, an image sensor 810, and a connector. 840) may be included.

The lens module 400 may include a lens or a lens barrel, and may be mounted or coupled to the bobbin 110 of the lens driving device 100.

For example, the lens module 400 may include one or more lenses and a lens barrel accommodating one or more lenses. However, one configuration of the lens module is not limited to the lens barrel, and any structure may be used as long as it has a holder structure capable of supporting one or more lenses. The lens module 400 may be coupled to the lens driving device 100 to move together with the lens driving device 100.

For example, the lens module 400 may be screwed to the lens driving apparatus 100 as an example. The lens module 400 may be coupled to the lens driving device 100 by an adhesive (not shown) as an example. Meanwhile, light passing through the lens module 400 may pass through the filter 610 and be irradiated onto the image sensor 810.

The adhesive member 612 may couple or attach the base 210 of the lens driving device 100 to the circuit board 800. For example, the adhesive member 612 may be an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive.

The filter 610 may serve to block light of a specific frequency band in the light passing through the lens barrel 400 from entering the image sensor 810. The filter 610 may be an infrared cut filter, but is not limited thereto. In this case, the filter 610 may be disposed parallel to the x-y plane.

In this case, the infrared cut filter may be formed of a film material or a glass material. As an example, the infrared filter may be formed by coating an infrared blocking coating material on a flat optical filter such as a cover glass or cover glass for protecting an imaging surface.

The filter 610 may be disposed under the base 210 of the lens driving device 100.

For example, the base 210 of the lens driving apparatus 100 may have a seating groove 29 for seating the filter 610 on its lower surface. In another embodiment, a separate sensor base for mounting the filter 610 may be provided.

The circuit board 800 may be disposed under the lens driving apparatus 100, and the image sensor 810 may be mounted on the circuit board 800. The image sensor 810 may receive an image included in light incident through the lens driving device 100 and convert the received image into an electrical signal.

The image sensor 810 may be positioned so that the lens module 400 and the optical axis coincide. Through this, the image sensor may acquire light that has passed through the lens module 400. The image sensor 810 may output irradiated light as an image.

The circuit board 800 may be electrically connected to the coil 120 and the sensing coil 170 of the lens driving device 100.

For example, the circuit board 800 may include terminals electrically connected to the first to fourth terminals 64-1 to 64-4 of the lens driving apparatus 100.

In FIG. 13, four terminals of the circuit board 800 are shown, but the present invention is not limited thereto, and the circuit board 800 may include a plurality of terminals, for example, two or more terminals necessary for controlling the camera module. have.

The filter 610 and the image sensor 810 may be disposed to be spaced apart to face each other in the first direction.

The connector 840 is electrically connected to the circuit board 800 and may include a port for electrically connecting to an external device. The camera module 200 may further include a motion sensor for outputting rotational angular velocity information by movement of the camera module 200.

14 is a perspective view of a portable terminal 200A according to an embodiment, and FIG. 15 is a configuration diagram of the portable terminal 200A shown in FIG. 14.

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

The body 850 shown in FIG. 14 is in the form of a bar, but is not limited thereto, and a slide type, a folder type, and a swing type in which two or more sub-bodies are coupled to enable relative movement. , Swirl type, etc. may have various structures.

The body 850 may include a case (casing, housing, cover, etc.) forming an exterior. For example, the body 850 may be divided into a front case 851 and a rear case 852. Various electronic components of the terminal may be embedded in a space formed between the front case 851 and the rear case 852.

The wireless communication unit 710 may include one or more modules that enable wireless communication between the terminal 200A and a wireless communication system or between the terminal 200A and a network in which the terminal 200A is located. For example, the wireless communication unit 710 may be configured to include a broadcast reception module 711, a mobile communication module 712, a wireless Internet module 713, a short-range communication module 714, and a location information module 715. have.

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

The camera 721 may include the camera module 200 according to the embodiment.

The sensing unit 740 monitors the current state of the terminal 200A, such as the open/closed state of the terminal 200A, the position of the terminal 200A, the presence of user contact, the orientation of the terminal 200A, and acceleration/deceleration of the terminal 200A. By sensing, a sensing signal for controlling the operation of the terminal 200A may be generated. For example, when the terminal 200A is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. In addition, it is responsible for a sensing function related to whether the power supply unit 790 supplies power and whether the interface unit 770 is coupled to an external device.

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

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

The display module 751 may include a plurality of pixels whose color changes according to an electrical signal. For example, the display module 751 includes a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a three-dimensional display. It may include at least one of 3D displays.

The sound output module 752 outputs audio data received from the wireless communication unit 710 in a call signal reception, a call mode, a recording mode, a voice recognition mode, or a broadcast reception mode, or stored in the memory unit 760. Audio data can be output.

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

The memory unit 760 may store a program for processing and control of the controller 780, and store input/output data (eg, a phone book, a message, an audio, a still image, a photo, a video, etc.). Can be stored temporarily. For example, the memory unit 760 may store an image captured by the camera 721, for example, a photo or a video.

The interface unit 770 serves as a passage for connecting to external devices connected to the terminal 200A. The interface unit 770 receives data from an external device, receives power, and transmits the data to each component inside the terminal 200A, or transmits data inside the terminal 200A to an external device. For example, the interface unit 770 includes a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for connecting a device equipped with an identification module, and an audio input/output (I/O) port. Output) port, video input/output (I/O) port, and earphone port.

The controller 780 may control the overall operation of the terminal 200A. For example, the controller 780 may perform related control and processing for voice calls, data communication, and video calls.

The controller 780 may include a multimedia module 781 for playing multimedia. The multimedia module 781 may be implemented in the controller 180 or may be implemented separately from the controller 780.

The controller 780 may perform pattern recognition processing capable of recognizing a handwriting input or a drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 790 may receive external power or internal power under the control of the control unit 780 to supply power required for operation of each component.

Features, structures, effects, and the like described in the embodiments above are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment may be combined or modified for other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Accordingly, contents related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

Claims (13)

housing;
A bobbin disposed in the housing;
A coil coupled to the bobbin;
A magnet disposed in the housing and facing the coil;
A base disposed to be spaced apart from the bobbin;
A lower elastic member coupled to the bobbin and including a first elastic member, a second elastic member, a third elastic member, and a fourth elastic member disposed on the base; And
And a sensing coil disposed in the housing and generating an induced voltage by interaction with the coil,
The corner of the base and the corner of the housing form a bonding region that is coupled to each other,
The lens driving device including a portion of the sensing coil disposed outside the coupling region. The method of claim 1,
The bonding region,
A pillar portion protruding from a corner of the base toward the housing; And
A lens driving device including a groove formed at a corner of the housing and coupled to the pillar part. The method of claim 1,
The coil is electrically connected to the first and second elastic members,
The sensing coil is a lens driving apparatus electrically connected to the third and fourth elastic members. The method of claim 1,
The coil has a ring shape surrounding the outer surface of the bobbin,
The sensing coil has a ring shape surrounding a lower portion of an outer surface of the housing. The method of claim 1,
The sensing coil overlaps with the magnet in the optical axis direction and does not overlap with the coil in the optical axis direction. The method of claim 1,
Each of the first and second elastic members includes an inner frame coupled to a lower portion of the bobbin,
One end of the coil is coupled to the inner frame of the first elastic member, and the other end of the coil is coupled to the inner frame of the second elastic member. The method of claim 6,
Each of the third and fourth elastic members includes an outer frame coupled to a lower portion of the housing,
One end of the sensing coil is coupled to the outer frame of the third elastic member, and the other end of the sensing coil is coupled to the outer frame of the fourth elastic member. The method of claim 1,
Each of the first to fourth elastic members includes a terminal bent and extended to a first outer surface of the base. The method of claim 2,
The lens driving device of the base is disposed inside the sensing coil. The method of claim 2,
The lens driving device disposed outside the sensing coil of the pillar portion of the base. The method of claim 9,
The sensing coil is in contact with the outer surface of the pillar portion, and a lens driving device including a portion overlapping the pillar portion in a direction perpendicular to the optical axis. The method of claim 10,
The sensing coil is in contact with the inner surface of the pillar portion, and a lens driving device including a portion overlapping the pillar portion in a direction perpendicular to the optical axis. The method of claim 1,
The sensing coil is a lens driving device surrounding a lower portion of an outer surface of the housing.

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