KR102548364B1 - Lens moving unit - Google Patents

Abstract

The embodiment includes a second circuit board, a housing disposed on the second circuit board, a bobbin disposed in the housing, a first coil and a magnet for moving the bobbin in a first direction parallel to an optical axis, and elasticity coupled with the bobbin and the housing. The elastic member includes a first lower elastic member and a second lower elastic member coupled to the lower part of the bobbin and the lower part of the housing, and one end of the first coil is connected to the first lower elastic member by the first solder. and the other end of the first coil is coupled to the second lower elastic member by the second solder.

Description

Lens driving unit {LENS MOVING UNIT}

The embodiment relates to a lens driving device.

A cell phone or smart phone equipped with a camera module that performs a function of taking an image of a subject and storing it as an image or video is being developed. In general, a camera module may include a lens, an image sensor module, and a voice coil motor (VCM) that adjusts a distance between the lens and the image sensor module.

While capturing a subject, the camera module may shake slightly according to the user's hand shake, and a desired image or video cannot be captured due to such hand shake.

A voice coil motor with an optical image stabilizer (OIS) function is being developed in order to compensate for distortion of an image or video caused by a user's hand shake.

The embodiment provides a lens driving device capable of miniaturization and image correction in a free direction.

A lens driving device according to an embodiment includes a second circuit board; a housing disposed on the second circuit board; a bobbin disposed within the housing; a first coil and a magnet for moving the bobbin in a first direction parallel to the optical axis; and an elastic member coupled to the bobbin and the housing, wherein the elastic member includes a first lower elastic member and a second lower elastic member coupled to a lower portion of the bobbin and a lower portion of the housing, Thus, one end of the first coil is coupled to the first lower elastic member, and the other end of the first coil is coupled to the second lower elastic member by a second solder.

The lens driving device may include a first circuit board disposed on the housing and coupled to each of the first and second lower elastic members by a third solder.

The lens driving device may include a support member electrically connecting the first circuit board and the second circuit board.

The lens driving device may include a first position sensor that is electrically connected to the first circuit board and detects displacement of the bobbin. The first position sensor may include a hall sensor and a driver for data communication.

The support member may include a plurality of support members, and each of the plurality of support members may be disposed at a corresponding one of the corners of the housing.

Each of the first and second lower elastic members includes an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connection portion connecting the inner frame and the outer frame, by the first solder. The one end of the first coil may be coupled to the inner frame of the first lower elastic member, and the other end of the first coil may be coupled to the inner frame of the second lower elastic member by the second solder. there is.

A lens driving device according to another embodiment includes a second circuit board; a housing disposed on the second circuit board; a bobbin disposed within the housing; a first coil and a magnet for moving the bobbin in a first direction parallel to the optical axis; a first circuit board disposed in the housing and including a first terminal and a second terminal; and an elastic member coupled to the bobbin and the housing, wherein the elastic member includes a first lower elastic member and a second lower elastic member coupled to a lower portion of the bobbin and a lower portion of the housing, The first lower elastic member is connected to the first terminal of the first circuit board, and the second lower elastic member is connected to the second terminal of the first circuit board by a second solder.

The first coil may be electrically connected to the first and second lower elastic members.

Each of the first and second lower elastic members includes an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connecting portion connecting the inner frame and the outer frame, and the first solder The outer frame of the first lower elastic member may be coupled to the first terminal, and the outer frame of the second lower elastic member may be coupled to the second terminal by the second solder.

A lens driving device according to another embodiment includes a second circuit board; a housing disposed on the second circuit board; a bobbin disposed within the housing; a first coil and a magnet for moving the bobbin in a first direction parallel to the optical axis; a first circuit board disposed in the housing; a first elastic member coupled to an upper portion of the bobbin and an upper portion of the housing; a second elastic member coupled to a lower portion of the bobbin and a lower portion of the housing; and a support member electrically connecting the first elastic member and the second circuit board, wherein the support member includes first and second wires disposed at a first corner of the housing, and the second elastic member includes first and second wires disposed at a first corner of the housing. A member electrically connects the first coil and the first circuit board.

The second elastic member may include a first area electrically connected to the first circuit board and a second area electrically connected to the first coil. The support member may include a third wire disposed at the second corner of the housing.

The support member may include third and fourth wires disposed at a second corner facing the first corner of the housing; a fifth wire disposed at a third corner of the housing; and a sixth wire disposed at a fourth corner facing the third corner of the housing.

A lens driving device according to another embodiment includes a second circuit board; a housing disposed on the second circuit board; a bobbin disposed within the housing; a first circuit board disposed in the housing; a first coil and a magnet for moving the bobbin in a first direction parallel to the optical axis; a first elastic member coupled to an upper portion of the bobbin and an upper portion of the housing; and a support member coupled to the first elastic member and electrically connecting the first circuit board and the second circuit board, wherein the housing includes a buffer support having a step with an upper surface of the housing; A part of the first elastic member is disposed on the buffer support portion. The lens driving device may include a damper disposed between the buffer support and one end of the first elastic member.

The first coil may be disposed on the bobbin, and the magnet may be disposed on the housing.

In the embodiment, miniaturization is possible and image correction is possible in a free direction.

1 shows a schematic perspective view of a lens driving device according to an embodiment.
FIG. 2 is an exploded perspective view of the lens driving device shown in FIG. 1 .
FIG. 3 is a perspective view of the lens driving device of FIG. 1 in which a cover member is removed.
Figure 4 shows a perspective view of the bobbin shown in Figure 2;
Figure 5 shows a first perspective view of the housing shown in Figure 2;
Figure 6 shows a second perspective view of the housing shown in Figure 2;
7 is a rear perspective view of a housing in which a bobbin and a lower elastic member are coupled.
FIG. 8 is a plan view of the upper elastic member shown in FIG. 2 .
9 shows a perspective view of a first upper elastic member and a second upper elastic member mounted on a bobbin and a housing.
FIG. 10 is an enlarged perspective view of part A shown in FIG. 3 .
FIG. 11 is a perspective view of a combination of a base, a circuit board, and a second coil shown in FIG. 2 .
FIG. 12 is an exploded perspective view of the base, the circuit board, and the second coil shown in FIG. 11 .
13 is a plan view showing the electrical connection between the second coil and the circuit board.
FIG. 14 is an exploded perspective view of the base, the second circuit board, and the second coil shown in FIG. 2 .
15 is a perspective view of the first circuit board shown in FIG. 2;
FIG. 16 is an AB sectional view of the lens driving device shown in FIG. 3 .
FIG. 17 is a CD sectional view of the lens driving device shown in FIG. 3;
18 is a plan view of a lens driving device according to another embodiment.
Fig. 19 is a perspective view of the lens driving device shown in Fig. 18;
20 is a plan view of a lens driving device according to another embodiment.
Fig. 21 is a perspective view of the lens driving device shown in Fig. 20;
22 is a conceptual diagram for explaining auto-focusing and hand-shake correction of a lens driving device according to an embodiment.
23 shows a moving direction of the movable unit according to the control of the second coils according to the first embodiment.
24 shows a moving direction of the movable unit according to the control of the second coils according to the second embodiment.
25 shows the position of the movable part according to the intensity of the current applied to the first coil.
26A to 26D show a driving algorithm for an auto focusing operation.

Hereinafter, embodiments will be clearly revealed through the accompanying drawings and description of the embodiments. In the description of the embodiment, each layer (film), region, pattern or structure is “on” or “under” the substrate, each layer (film), region, pad or pattern. In the case where it is described as being formed in, "up / on" and "under / under" include both "directly" or "indirectly" formed through another layer. do. In addition, the criterion for the upper/upper or lower/lower of each layer will be described based on the drawings.

In the drawings, sizes are exaggerated, omitted, or schematically illustrated for convenience and clarity of explanation. Also, the size of each component does not fully reflect the actual size. Also, like reference numerals denote like elements throughout the description of the drawings.

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 not being formed clearly due to vibration caused by the user's hand shake when capturing a still image. means a configured device.

Also, an 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 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 direction parallel to the optical axis or moved in a plane perpendicular to the optical axis. The same auto focusing operation and hand shake correction operation can be performed.

1 shows a schematic perspective view of a lens driving device 10 according to an embodiment, FIG. 2 shows an exploded perspective view of the lens driving device 10 shown in FIG. 1, and FIG. 3 is the lens driving device of FIG. 1 ( 10) shows a perspective view with the cover member 300 removed, FIG. 16 shows an AB sectional view of the lens driving device shown in FIG. 3, and FIG. 17 shows a CD sectional view of the lens driving device shown in FIG.

In FIGS. 1 to 17, an orthogonal coordinate system (x, y, z) may be used. In the drawing, the xy plane consisting of the x-axis and the y-axis means a plane perpendicular to the optical axis, and for convenience, the optical axis direction (z-axis direction) is the first direction, the x-axis direction is the second direction, and the y-axis direction is the third direction can be defined as

1 to 3 and 16 to 17, the lens driving device 10 includes a cover member 300, an upper elastic member 150, a bobbin 110, a first coil 120, a housing ( 140), magnet 130, lower elastic member 160, elastic support members 220a to 220d, first position sensor 180, second coil 230, second circuit board 250, base 210 ) and second and third position sensors 240a and 240b.

The bobbin 110, the first coil 120, the magnet 130, the housing 140, the upper elastic member 150, the lower elastic member 160, and the elastic supporting members 220a to 220d drive the first lens. The unit 100 may be formed, and a first position sensor 180 may be further included. The first lens driving unit 100 may be for auto focus.

In addition, the first lens driving unit 100, the second coil 230, the second circuit board 250, and the base 210 may form the second lens driving unit 200, and also the first and second Position sensors 240a and 240b may be further included. The second lens driving unit 200 may be for hand shake correction.

First, the cover member 300 will be described.

The cover member 300 includes an upper elastic member 150, a bobbin 110, a first coil 120, a housing 140, a magnet 130, a lower elastic member ( 160), the elastic support members 220a to 220d, the second coil 230, and the second circuit board 250 are accommodated.

The cover member 300 may have a box shape as a whole, and a lower portion of the cover member 330 may be coupled to an upper portion of the base 210 .

The cover member 300 may have an opening 310 on an upper surface for exposing a lens (not shown) coupled to the bobbin 110 to external light. In addition, a window made of a light-transmitting material may be provided in the opening 310 of the cover member 300 to prevent penetration of foreign substances such as dust or moisture into the camera module.

Next, the bobbin 110 will be described.

The bobbin 110 is disposed inside the housing 140 to be described later and is movable in a direction parallel to the optical axis, for example, in a first direction.

Although not shown, the bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed, but the lens barrel may be a configuration of a camera module to be described later, and a lens driving device ( 10) may not be an essential component.

The lens barrel may be coupled to the inside of the bobbin 110 in various ways.

FIG. 4 shows a perspective view of the bobbin 110 shown in FIG. 2 .

Referring to FIG. 4 , the bobbin 110 may have a structure having a hollow 101 for mounting a lens or a lens barrel. The shape of the hollow 101 may be determined by the shape of the lens or lens barrel. For example, hollow 101 may be circular, elliptical, or polygonal.

For example, the lens barrel may be coupled to the bobbin 110 by coupling the female thread 119 formed on the inner circumferential surface of the bobbin 110 and the male thread formed on the outer circumferential surface of the lens barrel. However, it 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. Alternatively, one or more lenses may be integrally formed with the bobbin 110 without a lens barrel.

The bobbin 110 may include at least one upper support protrusion 113 formed on an upper surface and at least one lower support protrusion 114 formed on a lower surface (see FIG. 7 ).

The upper support protrusion 113 of the bobbin 110 may be coupled to the inner frame 151 of the upper elastic member 150, and thereby the bobbin 110 may be coupled and fixed to the upper elastic member 150. .

The upper support protrusion 113 of the bobbin 110 may include a central protrusion 113a, a first upper protrusion 113b, and a second upper protrusion 113c.

The first upper protrusion 113b is disposed on one side of the central protrusion 113a and is spaced apart from the central protrusion 113a by a first distance, and the second upper protrusion 113c is located at the center of the other side of the central protrusion 113a. It may be spaced apart from the protrusion 113a by a second distance.

For example, the first distance and the second distance may be the same, and the first upper projection 113b and the second upper projection 113c may be disposed symmetrically left and right with respect to the central projection 113a. This is not the case, and the upper elastic member 150 may be left and right asymmetrical according to the shape of the inner frame 151 .

Each of the central protrusion 113a, the first upper protrusion 113b, and the second upper protrusion 113c may have a prismatic shape, but is not limited thereto, and may have a cylindrical shape in other embodiments.

The inner frame 151 of the upper elastic member 150 described later may be inserted between the central projection 113a and the first upper projection 113b and between the central projection 113a and the second upper projection 113c. , Due to this, the inner frame 151 can be coupled with the upper part of the bobbin. The upper support protrusion 113 of the bobbin 110 and the inner frame 151 may be fixed to each other by thermal fusion or an adhesive such as epoxy.

Even when the bobbin 110 receives force in a rotational direction around the optical axis, the first upper projection 113b and the second upper projection 113c may serve as stoppers to prevent the bobbin 110 from rotating. there is.

The number of upper support protrusions 113 of the bobbin 110 may be plural, and may be spaced apart from each other and disposed on the upper surface of the bobbin 110 .

When the number of upper support protrusions 113 of the bobbin 110 is plural, the plurality of upper support protrusions 113 of the bobbin 110 may be spaced apart from each other to avoid interference with neighboring parts. For example, the upper support protrusions 113 may be arranged at regular intervals symmetrically with respect to an imaginary line passing through the center of the bobbin 110 . Alternatively, the upper support protrusions 113 may be arranged symmetrically with respect to an imaginary line passing through the center of the bobbin 110, although the distance between the adjacent upper support protrusions 113 is not constant.

The lower support protrusion 114 of the bobbin 110 may have a cylindrical shape or a prismatic shape, and may be one or more. The lower support protrusion 114 of the bobbin 110 may be coupled to the inner frame 161 of the lower elastic member 160, whereby the bobbin 110 may be coupled and fixed to the lower elastic member 150. .

When the number of lower support projections 114 of the bobbin 110 is plural, the lower support projections 114 of the bobbin 110 are symmetrical with respect to an imaginary line passing through the center of the bobbin 110 at regular intervals or irregular intervals. Can be spaced apart.

A magnet seating groove 116 having a size corresponding to that of the magnet 130 may be provided between the upper and lower sides of the outer circumferential surface of the bobbin 110 .

The position of the magnet seating groove 116 may be provided on the outer circumferential surface of the bobbin 110 according to the arrangement position of the magnet 130, and the number of magnet seating grooves 116 is as many as the number of magnets on the outer circumferential surface of the bobbin 110. can be provided.

For example, four magnet seating grooves 116 spaced apart from each other may be provided on the outer circumferential surface of the bobbin 110, and there may be two pairs of magnet seating grooves facing each other. Also, a pair of magnet seating grooves 116 facing each other and the other pair of magnet seating grooves may be orthogonal to each other.

The magnet seating groove 116 may have a groove shape formed of a bottom and a side wall, and may have a structure in which a part of the side wall is open. For example, the magnet seating groove 116 may be in the form of a groove in which an upper sidewall is opened so that the magnet 130 can be inserted, but is not limited thereto. It may have a concave groove structure that is not open.

When the bobbin 110 moves in the first direction, in order to exclude spatial interference between the connection part 153 of the upper elastic member 150 and the bobbin 110, and to facilitate elastic deformation of the connection part 153, the upper side Corresponding to the connection part 153 of the elastic member 150, an upper escape groove 112 may be provided on the outer circumferential surface 110a.

The upper escape groove 112 may be formed on an upper portion of the outer circumferential surface 110a of the bobbin 110 positioned between two adjacent magnet seating grooves. For example, the bobbin 110 may include four upper escape grooves 112 formed spaced apart from each other on the upper portion of the outer circumferential surface 110a.

In addition, when the bobbin 110 moves in the first direction, in order to exclude spatial interference between the connection part 163 of the lower elastic member 160 and the bobbin 110, and to more easily elastically deform the connection part 163. Corresponding to the connection part 163 of the lower elastic member 160, a lower escape groove 118 may be provided at the lower part of the outer circumferential surface.

The lower escape groove 118 may be formed on the lower part of the outer circumferential surface 110a of the bobbin 110 located between two neighboring magnet seating grooves. For example, the bobbin 110 may include four lower escape grooves 118 formed at a lower portion of the outer circumferential surface 110a and spaced apart from each other.

An outer circumferential surface 110a of the bobbin 110 located between two adjacent magnet seating grooves may be a convex curved surface from the center of the hollow 101 of the bobbin 110 toward the outer circumferential surface of the bobbin 110.

Next, the magnet 130 will be described.

The magnet 130 is disposed on the outer circumferential surface of the bobbin 110 to correspond to the first coil 120 to be described later. For example, the magnet 130 may be disposed in the magnet seating groove 116 of the bobbin 110 .

The magnet 130 may be fixed to the magnet receiving groove 116 of the bobbin 110 using an adhesive member such as adhesive or double-sided tape.

The number of magnets 130 may be one or more. For example, as shown in FIG. 2 , four magnets may be spaced apart from each other and disposed on the outer circumferential surface of the bobbin 110 .

The magnet 130 may have a rectangular parallelepiped shape, but is not limited thereto, and may have a trapezoidal shape in another embodiment.

The magnet 130 may be disposed in the magnet seating groove 116 such that its wide surface faces the outer circumferential surface of the bobbin 110, and the magnets 130 facing each other may be disposed in parallel.

Also, the magnet 130 may be disposed to face the first coil 120 to be described later.

Surfaces of the magnet 130 and the first coil 120 facing each other may be arranged to be parallel to each other. However, this is not limited thereto, and only one of the surfaces facing each other of the magnet 130 and the first coil 120 may be a flat surface, and the other may be a curved surface. Alternatively, all of the facing surfaces of the first coil 120 and the magnet 130 may be curved, and in this case, the curvature of the facing surfaces of the first coil 120 and the magnet 130 may be the same.

The magnet 130 and the first coil 120 may be configured to correspond to each other.

If the magnet 130 is composed of a single body and is arranged so that the entire surface facing the first coil 120 has the same polarity, the first coil 120 also has the same polarity as the surface corresponding to the magnet 130. It can be configured as a list.

For example, the magnet 130 may be disposed such that a surface facing the first coil 120 has an N pole and a surface opposite to the N pole has an S pole. However, it is not limited thereto, and it is also possible to reverse the polarity of the magnet 130 .

In another embodiment, when the magnet 130 is divided into two on a plane perpendicular to the optical axis and the plane facing the first coil 120 is divided into two or more, the first coil 120 is also a divided magnet ( 130), it is also possible to be divided into the corresponding number.

Next, the housing 140 will be described.

The housing 140 supports the first coil 120 and accommodates the bobbin 110 therein so as to move in a first direction parallel to the optical axis.

7 is a first perspective view of the housing 140 shown in FIG. 2, FIG. 8 shows a second perspective view of the housing 140 shown in FIG. 2, and FIG. 9 shows the bobbin 110 and the lower elastic member 160 ) represents a rear perspective view of the coupled housing 140.

Referring to FIGS. 7 to 9 , the housing 140 may have a hollow column shape as a whole. For example, the housing 140 may have a polygonal (eg, quadrangular or octagonal) hollow 201 .

The housing 140 may include an upper end 710 having a hollow 201 and a plurality of support parts 720 - 1 to 720 - 4 connected to a lower surface of the upper end 710 .

The support parts 720-1 to 720-4 are spaced apart from each other, and an opening 701 exposing the magnet 130 mounted on the outer circumferential surface of the bobbin 110 may be formed between two adjacent support parts.

The upper end 710 of the housing 140 may have a rectangular shape, and the plurality of support parts 720-1 to 720-4 may be spaced apart from each other.

The support portions 720-1 to 720-4 of the housing 140 may have a prismatic shape, but are not limited thereto.

The housing 140 may include four support parts 720-1 to 720-4, and at least one pair of the support parts may be disposed to face each other.

For example, the support parts 720-1 to 720-4 of the housing 140 may be arranged to correspond to the escape grooves 112 and 118 of the bobbin 110.

Also, for example, the support parts 720-1 to 720-4 of the housing 140 may be disposed to correspond to the outer circumferential surface 110a of the bobbin 110 located between two adjacent magnet seating grooves.

Also, for example, the support parts 720 - 1 to 720 - 4 of the housing 140 may be disposed to correspond to or align with each of the four corners of the upper part 710 .

The outer peripheral surface 730 of each of the support parts 720-1 to 720-4 of the housing 140 has a first side surface 730-1 parallel to the second direction and a second side surface 730-1 parallel to the third direction. 2), and a third side surface 730-3 disposed between the first side surface and the second side surface. Each of the first to third side surfaces 720-1 to 720-3 may be planar.

The first angle formed by the third side surface 730-3 of each of the support parts 720-1 to 720-4 of the housing 140 and the first side surface 730-1, and the third side surface 730-3 The second angle formed by the second side surface 720 - 2 may be an obtuse angle, and the first angle and the second angle may be the same.

The area of the third side surface 730-3 of each of the support parts 720-1 to 720-4 of the housing 140 is larger than that of each of the first and second side surfaces 730-1 and 730-2. It can be, but is not limited thereto.

The inner circumferential surface 740 of each of the support parts 720-1 to 720-4 of the housing 140 may be a convex curved surface from the center of the hollow 201 of the housing 140 toward the outer circumferential surface 730 of the housing 140. there is.

In order to allow the bobbin 110 to easily move in the first direction within the housing 140 without interfering with the housing 140, each of the support parts 720-1 to 720-4 of the housing 140 has an inner circumferential surface 740. ) may have a curved surface corresponding to or matching the curved surface of the outer circumferential surface of the bobbin.

In order to support the first coil 120 to be described later, the support parts 720-1 to 720-4 of the housing 140 are stepped protruding from the lower portions of the first and second side surfaces 720-1 and 720-2 ( 731, 732) may be provided.

The housing 140 may include at least one first stopper 143 protruding from an upper surface to prevent collision with the cover member 300 . That is, the first stopper 143 of the housing 140 can prevent the upper end 710 of the housing 140 from directly colliding with the inner surface of the cover member 300 when an external impact occurs.

For example, the first stopper 143 may protrude from the upper surface of the upper end 710 of the housing 140, and may be arranged in correspondence with or aligned with the support parts 720-1 to 720-4 of the housing 140. there is.

The number of first stoppers 143 may be plural, and the plurality of first stoppers may be spaced apart from each other. For example, at least one pair of first stoppers may be disposed to face each other.

The first stopper 143 may have a cylindrical or polygonal column shape, and may be divided into two or more. For example, the first stopper 143 may be divided into two, and the two divided first stoppers 143a and 143b may be spaced apart by a preset distance. In addition, the first stopper 143 of the housing 140 may serve to guide the installation position of the upper elastic member 150 .

The housing 140 may include at least one second stopper 146 protruding from the side of the upper end 710 to prevent collision with the cover member 300 . That is, the second stopper 146 of the housing 140 may prevent the side surface of the upper end 710 of the housing 140 from directly colliding with the inner surface of the cover member 300 when an external impact occurs.

The housing 140 may further include at least one upper frame support protrusion 144 protruding from the upper surface of the upper end 710 to be coupled with the outer frame 152 of the upper elastic member 150 .

The number of upper frame supporting protrusions 144 of the housing 140 may be plural, and the plurality of upper frame supporting protrusions 144 of the housing 140 are mutually placed on the upper surface of the upper end 710 of the housing 140. They can be spaced apart.

For example, the upper support protrusion 144 may be spaced apart from the first stopper 143 and disposed adjacent to a corner of the housing 140 .

In addition, the housing 140 includes at least one lower frame support protrusion 145 protruding from the lower surface of each of the support parts 720-1 to 720-4 for coupling with the outer frame 162 of the lower elastic member 160. can be provided.

The lower frame support protrusion 145 may have a cylindrical or polygonal column shape, and may be aligned at the center of the lower surface of each of the support parts 720-1 to 720-4, but is not limited thereto. In another embodiment, the number of lower frame supporting protrusions 145 of the housing 140 may be plural.

The upper end 710 of the housing 140 may include a buffering support 741 that contacts the hollow 201 and has a step d1 with the upper surface. A damper to be described later may be disposed or applied to the buffer support 741 .

For example, the upper surface 740 of the upper end 710 of the housing 140 may include a buffer support 741 and an outer support 742, and there is a step between the buffer support 741 and the outer support 742. (d1) exists.

The outer support 742 contacts the side surface of the housing 140, may have a shape corresponding to or coincident with the outer frame 152 of the upper elastic member 150, and the outer frame 152 of the upper elastic member 150. can support

The buffer support 741 may have a groove shape that is depressed downward from the outer support 742 and may have a step d1 with the outer support 742 .

The buffer support part 741 is located in correspondence with the first part S1 positioned to correspond to each of the support parts 720-1 to 720-4 of the housing 140 and the bent part 151a of the upper elastic member. It may include a second part (S2).

The first part S1 of the buffer support 741 may be vertically aligned with the connection part 153 of the upper elastic member 150 and the upper escape groove 112 of the bobbin 110 .

In order to prevent an oscillation phenomenon when the bobbin 110 moves, a damper may be applied between the connection part 153 of the buffer support part 741 and the upper elastic member 150.

The second portion S2 of the buffer support 741 may include an escape groove 750 to eliminate spatial interference with the bent portion 151a of the inner frame 151 of the upper elastic member 150 . In order to avoid spatial interference, the length of the escape groove 750 may be equal to or longer than the length of the bent portion 151a.

The housing 140 may have a through groove 751 through which the elastic support members 220a to 220d pass at the edge of the side of the upper end 710 .

The through groove 751 may be a groove structure depressed from the side of the upper end 710 of the housing 140, but is not limited thereto, and in another embodiment, the upper and lower surfaces of the upper end 710 of the housing 140 It may also be a hole structure penetrating the surface.

The through hole 751 may have a depth such that portions of the elastic support members 220a to 220d inserted into the through hole 751 are not exposed to the outside of the side of the housing 140 . The through groove 751 may serve to guide or support the elastic support members 220a to 220d.

The housing 140 may have a first position sensor groove 141b on the side of the upper end 710 . The groove 141b for the first position sensor may have a size and shape corresponding to that of the first position sensor 180 .

For example, the groove 141b for the first position sensor may be formed on a side surface of the upper end 710 positioned between the support parts 720-1 to 720-4 of the housing 140.

The first position sensor 190 is disposed in the groove 141b for the first position sensor of the housing 140 . The first position sensor 190 is electrically connected to the first circuit board 170 by soldering or soldering.

For example, the first position sensor 190 may be electrically connected to the first terminal surface 170a of the first circuit board 170 .

The first position sensor 190 may be a sensor that detects a change in magnetic force emitted from the magnet 130 and may determine a first displacement value related to a change in position of the bobbin 110 in the first direction. The first position sensor 190 may be disposed to correspond to the magnet 130 .

For example, the first position sensor 190 may receive data from a hall sensor and the hall sensor and perform data communication using a protocol with an external controller, eg, I2C communication. Alternatively, the first position sensor 190 may be implemented as a Hall sensor alone.

Next, the first coil 120 will be described.

The first coil 120 is disposed on the outer circumferential surface of the housing 140 .

The first coil 120 may be disposed on outer circumferential surfaces 730 of the support parts 720 - 1 to 720 - 4 of the housing 140 .

For example, the first coil 120 may be a ring disposed on the first to third side surfaces 730-1 to 730-3 of the support parts 720-1 to 720-4 of the housing 140. It may be a shaped coil block, but is not limited thereto.

The ring shape of the first coil 120 may be a polygon corresponding to the shape of the outer circumferential surface 730 of the support parts 720 - 1 to 720 - 4 of the housing 140 , for example, an octagon. For example, at least four faces of the ring shape of the first coil 120 may be straight, and a corner portion connecting the four faces may be round or straight.

The first coil 120 may directly face the magnet 130 through the opening 701 of the housing 140 . That is, the housing 140 is not interposed between the magnet 130 and the first coil 120, and the first coil 120 and the magnet 130 may be open to each other through the opening 701.

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

The upper elastic member 150 and the lower elastic member 160 elastically support the bobbin 110 so as to ascend and descend in a first direction parallel to the optical axis.

The upper elastic member 150 includes an inner frame 151 coupled to the bobbin 110, an outer frame 152 coupled to the housing 140, and a connection portion 153 connecting the inner frame 151 and the outer frame 152. ), and elastic support members 220a to 220d connected to the outer frame 152 .

The lower elastic member 160 includes an inner frame 161 coupled to the bobbin 110, an outer frame 162 coupled to the housing 140, and a connection portion connecting the inner frame 161 and the outer frame 162 ( 163) may be included. The upper elastic member 150 and the lower elastic member 160 may be in the form of leaf springs.

Each of the connection portions 153 and 163 of the upper and lower elastic members 150 and 160 may be bent at least once to form a pattern having a predetermined shape.

The upward and/or downward motion of the bobbin 110 in the first direction parallel to the optical axis may be supported by the elastic force through the change in position and the fine deformation of the connecting parts 153 and 163 . The connection parts 153 and 163 may connect the inner frames 151 and 161 and the outer frames 152 and 162 such that the inner frames 151 and 161 are elastically deformable in a first direction with respect to the outer frames 152 and 162 within a predetermined range. .

The inner frame 151 of the upper elastic member 150 may have a hollow corresponding to the hollow 101 of the bobbin 110 or/and the hollow 201 of the housing 140 . The outer frame 152 of the upper elastic member 150 may have a polygonal ring shape disposed around the inner frame 151 .

The inner frame 151 of the upper elastic member 150 may have a bent portion 151a coupled to the upper support protrusion 113 of the bobbin 110 .

The bent portion 151a may have a convex groove shape in a direction from the center of the inner frame 151 to the outer circumferential surface of the inner frame 151 .

As shown in FIG. 10, the bent portion 151a includes a first part 911, a second part 912, and a third part (located between the first part 911 and the second part 912). 913) may be included.

The first and second parts 911 and 912 of the bent portion 151a are sandwiched between the central protrusion 113a and the first upper protrusion 113b and between the central protrusion 113a and the second upper protrusion 113c. can An inner circumferential surface of the third portion 913 of the bent portion 151a may come into contact with an outer circumferential surface of the central protrusion 113a of the bobbin 110 .

The upper support protrusion 113 of the bobbin 110 and the bent portion 151a of the upper elastic member 150 may be fixed by thermal fusion or by an adhesive such as epoxy.

A first through hole 152a coupled to the upper frame supporting protrusion 144 of the housing 140 may be provided in the outer frame 152 of the upper elastic member 150 . The upper frame supporting protrusion 144 of the housing 140 and the first through hole 152a of the upper elastic member 150 may be fixed by thermal fusion or by an adhesive such as epoxy.

The outer frame 152 of the upper elastic member 150 may have a first guide groove 155 coupled to the first stopper 143 of the housing 140 .

The guide groove 155 of the upper elastic member 150 may be formed adjacent to a position corresponding to the first stopper 143 of the housing 140, for example, a corner of the outer frame 152.

For example, first guide grooves 155a and 155b corresponding to the divided first stoppers 143a and 143b may be formed in the outer frame 152 of the upper elastic member 150, and the first guide grooves ( 155a, 155b) may be spaced apart from each other.

The inner frame 161 of the lower elastic member 160 may have a hollow corresponding to the hollow 101 of the bobbin 110 or/and the hollow 201 of the housing 140 .

The outer frame 162 of the lower elastic member 160 may have a polygonal ring shape disposed around the inner frame 161 .

The lower elastic member 160 may be divided into two to receive power of different polarities. The lower elastic member 160 may include a first lower elastic member 150a and a second lower elastic member 150b that are electrically isolated from each other.

Each of the inner frame 161 and the outer frame 162 of the lower elastic member 160 may be divided into two to be electrically separated.

For example, each of the first and second lower elastic members 160a and 160b may include one of two divided inner frames, one of two divided outer frames, and a connection portion connecting the two. can

A third through hole 161a coupled to the lower support protrusion 114 of the bobbin 110 may be provided in the inner frame 161 of the lower elastic member 160 . The lower support protrusion 114 of the bobbin 110 and the third through hole 161a of the lower elastic member 150 may be fixed by thermal fusion or by an adhesive such as epoxy.

The outer frame 162 of the lower elastic member 160 may have an insertion groove 162a coupled to the lower frame support protrusion 145 of the support parts 720-1 to 720-4 of the housing 140. .

The lower frame supporting protrusion 145 of the housing 140 and the insertion groove 162a of the lower elastic member 160 may be fixed by thermal fusion or by an adhesive such as epoxy.

The lower elastic member 160 may be electrically connected to the first coil 120 .

The line of sight of the first coil 120 may be electrically connected to the first lower elastic member 160a, and the longitudinal line of the first coil 120 may be electrically connected to the second lower elastic member 160b.

For example, one end of the inner frame of the first lower elastic member 160a may be provided with a first bonding part electrically connected to the line of sight of the first coil 120 by soldering or soldering. In addition, a second bonding part electrically connected to the vertical line of the first coil 120 may be provided at one end of the inner frame of the second lower elastic member 160b.

The lower elastic member 160 is electrically connected to a first circuit board 170 to be described later. For example, the outer frame 162 of each of the first and second lower elastic members 160a and 160b includes pad portions 165a and 165b electrically connected to the first circuit board 170 through soldering or soldering. can be provided

The pad parts 165a and 165b of the lower elastic member 160 are the first terminals 175-1 to 175-n formed on the first terminal surface 170a of the first circuit board 170, where n>1. natural number) can be electrically connected to the corresponding terminal.

The coupling between the first through hole 151a of the inner frame 151 of the upper elastic member 150 and the upper support protrusion 113 of the bobbin 110, and the second of the inner frame 161 of the lower elastic member 160 The bobbin 110 may be fixed to the inner frames 151 and 161 of the upper and lower elastic members 150 and 160 by the coupling between the three through holes 161a and the lower supporting protrusion 114 of the bobbin 110. there is.

In addition, the coupling between the second through hole 152a of the outer frame 152 of the upper elastic member 150 and the upper frame support protrusion 144 of the housing 140, and the outer frame 162 of the lower elastic member 160 Due to the coupling between the insertion groove 162a and the lower frame support protrusion 145 of the housing 140, the housing 140 has the outer frames 152 and 162 of the upper and lower elastic members 150 and 160 can be fixed on

In another embodiment, each of the upper elastic member 150 and the lower elastic member 160 may be electrically connected to the first circuit board 170 without dividing the lower elastic member 160 in two.

In the embodiment, the lower elastic member 160 is divided into two, and the upper elastic member 150 is not divided, but is not limited thereto. In another embodiment, the lower elastic member 160 is not divided, the upper elastic member 150 is divided into two parts, and the upper elastic members divided into two parts are electrically connected to the first circuit board 170 so that the first coil ( 120) can be supplied with power with a different polarity.

In another embodiment, the line of sight of the first coil 120 is connected to the upper elastic member 150 without dividing the upper and lower elastic members 150 and 160, and the vertical line of the first coil 120 is connected to the lower side. Power having different polarities may be supplied to the first coil 120 by connecting to the elastic member 160 and electrically connecting the upper and lower elastic members 150 to the first circuit board.

In another embodiment, the upper and lower elastic members 150 and 160 are not divided, the first circuit board 170 is not electrically connected, and the first coil 120 and the first coil 120 are electrically directly connected. By connecting and electrically connecting the first circuit board 170 and the second circuit board 250 by the elastic support members 220a to 220d, power having different polarities may be supplied to the first coil 120.

Next, the first circuit board 170 will be described.

The first circuit board 170 is disposed on the upper elastic member 150 .

FIG. 15 shows a perspective view of the first circuit board 170 shown in FIG. 2 .

Referring to FIG. 15 , the first circuit board 170 includes a first upper surface portion 170b disposed on the outer frame 152 of the upper elastic member 150 and a downward direction from the first upper surface portion 170b. A bent first terminal surface 170a may be included.

The first upper surface portion 170b of the first circuit board 170 may have a shape corresponding to or coincident with the outer frame 152 of the upper elastic member 150 . For example, the first upper surface portion 170b of the first circuit board 170 may have a ring shape having a hollow 710-1, and the outer circumferential surface of the upper surface portion 170b of the first circuit board 170. may be a rectangle.

The first circuit board 170 may have a fourth through hole 171 coupled to the upper support protrusion 144 of the housing 140 on the first upper surface 170b. The upper support protrusion 144 of the housing 140 and the fourth through hole 171 of the first circuit board 170 may be fixed with an adhesive material such as heat fusion or epoxy.

The first circuit board 170 may have a second guide groove 172 coupled to the first stopper 143 of the housing 140 . Here, the second guide groove 172 may have a through groove shape penetrating the first circuit board 170 .

The first stopper 143 of the housing 140 is connected to the first guide groove 155 of the outer frame 152 of the upper elastic member 150 and the second guide groove 172 of the first circuit board 170. can be combined together.

The second guide groove 172 of the first circuit board 170 is located at a position corresponding to the first stopper 143 of the housing 140, for example, on the first upper surface 170b of the first circuit board 170. It may be formed adjacent to a corner.

For example, second guide grooves 172a and 172b corresponding to the divided first stoppers 143a and 143b may be formed on the first upper surface 170b of the first circuit board 170, and the second guide The grooves 172a and 172b may be spaced apart from each other.

The first circuit board 170 may include first pads 174a to 174d electrically connected to ends of the elastic support members 220a to 220d on the first upper surface 170b.

For example, the first pads 174a to 174d of the first circuit board 170 may have through holes through which the elastic support members 220a to 220d may be inserted.

Each of the first pads 174a to 174d of the first circuit board 170 may be electrically connected to a corresponding one end of the elastic support members 220a to 220d by soldering or soldering.

Each of the first pads 174a to 174d of the first circuit board 170 has a corresponding corner of the first upper surface 170b of the first circuit board 170 and the second guide grooves 172a and 172b. can be placed between them.

The first terminal surface 170a of the first circuit board 170 may be vertically bent downward from the first upper surface portion 170b, and includes a plurality of first terminals to which electrical signals are input from the outside or It may include first pins (175-1 to 175-n, a natural number where n>1).

For example, in order to facilitate electrical connection with the first position sensor 190, the first terminal surface 170a of the first circuit board 170 is a housing 140 in which a groove 141b for the first position sensor is provided. It can be bent to the side of the upper end 710 of. Accordingly, the first position sensor 190 disposed in the groove 141b for the first position sensor may come into close contact with the first terminal surface 170a of the first circuit board 170 .

A plurality of terminals (175-1 to 175-n, a natural number where n>1) is a terminal for supplying power to the first position sensor 190 by receiving power from the outside, and outputting the first position sensor 190. A terminal for outputting and/or a terminal for testing the first position sensor 190 may be included. The number of terminals 175 - 1 to 175 - n (n > 1, a natural number) formed on the first circuit board 170 may be increased or decreased depending on the type of components that need to be controlled.

The first position sensor 190 includes a plurality of terminals (175-1 to 175-n, where n>1 is a natural number) formed on the first terminal surface 170a of the first circuit board 170 by soldering or soldering. may be electrically connected to at least one of the first position sensor 190, and the number of electrically connected terminals may be determined according to an implementation form of the first position sensor 190.

In another embodiment, the first circuit board 170 and the upper elastic member 150 may be integrally implemented. For example, the first circuit board 170 may be omitted, and the upper elastic member 150 may include a structure in which a thin film having heat resistance, chemical resistance, and bending resistance and a copper foil pattern for circuit wiring are laminated. .

Also, in another embodiment, the first circuit board 170 and the lower elastic member 160 may be integrally implemented. For example, the first circuit board 170 may be omitted, and the lower elastic member 160 may include a structure in which a flexible film and a copper foil pattern are laminated.

Next, the base 210, the second circuit board 250, and the second coil 230 will be described.

The base 210 is connected to the above-described cover member 300, and the support parts 720-1 to 720-4 of the housing 140 may be fixed.

FIG. 14 is an exploded perspective view of the base 210, the second circuit board 250, and the second coil 230 shown in FIG. 2 .

Referring to FIG. 14, the base 210 has a hollow 301 (see FIG. 10) corresponding to the hollow 101 of the bobbin 110 described above and/or the hollow 201 of the housing 140, It may have a shape that matches or corresponds to the cover member 300, for example, a rectangular shape.

In addition, the base 210 is recessed from the upper surface and has a seating groove 213 for inserting or fixing the lower frame support protrusions 145 of the support parts 720-1 to 72-4 of the housing 140. can be provided.

For example, the seating groove 213 may be formed on the upper surface of the base 210 to correspond to the second sidewall 142 of the housing 140 .

In order to facilitate the insertion of the lower frame supporting protrusion 145 of the housing 140 , a portion of a side surface of the seating groove 213 may be opened into the hollow 301 of the base 210 . That is, a surface facing the hollow of the base 210 among the side surfaces of the seating groove 213 of the base 210 may be open.

The lower frame support protrusion 145 of the housing 140 may be inserted into the seating groove 213 and may be fixed to the seating groove 213 by an adhesive member such as epoxy.

The base 210 is concave from the side to a predetermined depth and has a size corresponding to that of the terminal surface 250a of the second circuit board 250 to support the terminal surface 250a of the second circuit board 250. It may be provided with a terminal surface support groove (210a) having.

The terminal surface support groove 210a may be formed on at least one of the side surfaces of the base 210, and does not protrude outside the outer circumferential surface of the base 210, or the second terminal surface is controlled to protrude outside the outer circumferential surface of the base 210. It may serve to seat the terminal surface 250a of the circuit board 250 .

In addition, the base 210 is recessed from the upper surface, and includes a second position sensor seating groove 215a in which the second position sensor 240a is disposed, and a third position sensor seating groove in which the third position sensor 240b is disposed. (215b) may be provided.

An angle formed by an imaginary line connecting the second and third position sensor seating grooves 215a and 215b and the center of the base 210 may be 90 degrees.

The second and third position sensor seating grooves 215a and 215b may be opened out of the side of the base 210 and may be opened into the hollow 301 of the base 210, but are not limited thereto, and other In an embodiment, the second and third position sensor seating grooves may have a concave shape recessed from an upper surface.

The second and third position sensor seating grooves 215a and 215b may be located at the center of the side of the upper surface of the base 210 . For example, the first and second position sensor seating grooves 215a and 215b may correspond to or be aligned with the center or near the center of the second coil 230, and the center of the second coil 230 and the position sensor seating groove. Centers of the second and third position sensors 240a and 240b disposed on the fields 215a and 215b may be aligned with each other.

Upper surfaces of the second and third position sensors 240a and 240b disposed in the second and third position sensor seating grooves 215a and 215b may be on the same plane as the upper surface of the base 210 .

In addition, the base 210 may further include a step 210b protruding from a lower portion of the outer circumferential surface. When the base 210 and the cover member 300 are coupled, the upper portion of the step 210b of the base 210 may guide the cover member 300 and may come into contact with the lower portion of the cover member 300 . The step 210b and the end of the cover member 300 may be adhesively fixed and sealed with an adhesive or the like.

The base 210 may include a coupling protrusion 212a protruding from an upper surface to fix the second circuit board 250 thereto.

The coupling protrusion 212a may be disposed on an upper surface adjacent to a corner of the base 210 . For example, the coupling protrusion 212a may be located between the corner of the base 210 and the seating groove 213 . The number of coupling protrusions 212a may be two or more, and may be arranged to face each other, but is not limited thereto.

The printed circuit board on which the image sensor is mounted may be combined with the lower surface of the base 210 to form a camera module.

Next, the second and third position sensors 240a and 240b will be described.

The second and third position sensors 240a and 240b are disposed below the second circuit board 250 . For example, the second and third position sensors 240a and 240b may be disposed in the position sensor seating grooves 215a and 215b of the base 210, and the housing 140 may be disposed in the second direction or/and third direction. detect movement in the direction

The second and third position sensors 240a and 240b may detect changes in magnetic force emitted from the magnet 130 . For example, the second and third position sensors 240a and 240b may be Hall sensors, but are not limited thereto, and any sensors capable of detecting a change in magnetic force may be used.

The second and third position sensors 240a and 240b may be arranged to be aligned with the center of the second coil 230 .

The second and third position sensors 240a and 240b may be electrically connected to the second circuit board 250 by soldering or soldering.

Next, the second circuit board 250 will be described.

Based on the second circuit board 250, the second coil 230 may be installed on an upper surface and the position sensors 240a and 240b may be installed on a lower surface. The first and second position sensors 240a and 240b, the second coil 230, and the magnet 130 may be disposed on the same axis, but are not limited thereto.

The second circuit board 250 is disposed on the upper surface of the base 210, and the hollow 101 of the bobbin 110, the hollow 201 of the housing 140, or / and the hollow of the base 210 ( 301) is provided with a hollow (401, see FIG. 14) corresponding to. The shape of the outer circumferential surface of the second circuit board 250 may coincide with or correspond to the upper surface of the base 210 , for example, a rectangular shape.

The second circuit board 250 may include at least one second terminal surface 250a bent from an upper surface and formed with a plurality of terminals or pins receiving electrical signals from the outside. can

For example, the second circuit board 250 may include second coil terminals, second and third position sensor terminals, and first circuit board terminals on the terminal surface 250a.

Terminals for the second coil may be terminals to which signals for driving the second coils 230a to 230d are input. For example, in order to independently drive each of the four second coils 230a to 230d, a total of eight second coil terminals may be provided. Alternatively, in order to independently drive the coils 230a and 230b for the second direction and the coils 230c and 230d for the third direction, a total of four terminals for the second coil may be provided.

Terminals for the second coil may be electrically connected to pads 253-1 to 253-8 of the second circuit board 250 to be described later through a wiring pattern of the second circuit board 250.

The terminal for the second position sensor may include two input terminals and two output terminals, and the terminal for the third position sensor may include two input terminals and two output terminals. However, since the second position sensor and the third position sensor can use two input terminals in common, the number of terminals for the second and third position sensors may be six in total.

Terminals for the first circuit board may be terminals allocated to the first circuit board 170 .

For example, in the case where the first position sensor 190 has a structure including a Hall sensor and an I2C communication driver, the first power supply VCC, the second power supply GND, the synchronization clock signal SCL, and data Four terminals for bit information (SDA) may be required.

When the first position sensor 190 is a Hall sensor and a driver integrated type, the first position sensor 190 can provide two power sources having different polarities provided to the first coil 120. In this case, the first position sensor 190 can provide 190 and the first coil 120 may be electrically connected through a wiring pattern of the first circuit board. Accordingly, when the first position sensor 190 is an integrated Hall sensor and driver type, the number of terminals for the first circuit board may be 4 in total.

Also, for example, when the first position sensor 190 is implemented with only a Hall sensor, four power supply terminals for the Hall sensor may be required. Therefore, when the first position sensor 190 is implemented with only a hall sensor, a total of four terminals for the first circuit board may be provided.

The upper and lower elastic members 150 and 160 are not divided, and power is supplied to the first coil 120 by the first circuit board 120, the second circuit board 250, and the elastic support members 220a to 220d. supply, and in the case where the first position sensor 190 is implemented with only a hall sensor, a total of 6 terminals for the first circuit board may be provided.

Terminals for the first circuit board of the second circuit board 250 may be electrically connected to the first circuit board 170 by elastic support members 220a to 220d to be described later.

The second circuit board 250 may be a flexible printed circuit board (FPCB), but is not limited thereto, and terminals of the circuit board may be formed on the surface of the base 210 using a surface electrode method or the like.

The second circuit board 250 may include at least one terminal or pad 253 - 1 to 253 - 8 to which the line line or vertical line of the second coil 230 is electrically connected.

For example, the second circuit board 250 includes first terminals 253-1 and 253-3 electrically connected to the line of sight of the second coils 230a and 230b for the second direction, and the second coil for the second direction ( The second terminals 253-2 and 253-4 to which the vertical lines of 230a and 230b are electrically connected, and the third terminal 253-5 to which the lines of sight of the second coils 230c and 230d for the third direction are electrically connected. , 253-7), and fourth terminals 253-6 and 253-8 to which vertical wires of the second coils 230c and 230d for the third direction are electrically connected.

The second circuit board 250 may have a fifth through hole 251 coupled to the coupling protrusion 212a of the base 210 . The number of fifth through-holes 251 of the circuit board 250 may be plural and may be arranged to face each other.

For example, the fifth through hole 251 may be formed between the first terminal 253-3 and the third terminal 253-7 of the second circuit board 250, and between the second terminal 253-2 and the fourth terminal ( 253-6).

The second circuit board 250 may include second pads 252a to 252d to which ends of the elastic support members 220a to 220d are connected. For example, the second pads 252a to 252d may have grooves or through holes into which ends of the elastic support members 220a to 220d may be inserted.

Each of the second pads 252a to 252d may be disposed adjacent to a corner of the second circuit board 250, but is not limited thereto.

The second pads 252a to 252d may be electrically connected to a plurality of pins provided on the terminal surfaces 251a and 251b by a wiring pattern formed on the second circuit board 250 .

Next, the second coil 230 will be described.

The second coils 230a to 230d are disposed on the upper surface of the second circuit board 250 to correspond to or face the magnet 130 .

In FIG. 14 , the second coils 230a to 230d are disposed on the upper surface of the second circuit board 250, but are not limited thereto, and in another embodiment, the second circuit board 250 and a separate circuit board. It may have a structure including a coil inside, may be disposed in close contact with the base 210, or may be disposed spaced apart from the base 210 by a predetermined distance.

The second coils 230a to 230d may be aligned on the same axis as the magnet 130, but are not limited thereto. In another embodiment, the second coils 230a to 230d are arranged to have a larger distance than the distance from the magnet 130 from a virtual central axis passing through the hollow 101 of the bobbin and the hollow 301 of the housing 140. It may be or may be arranged to have the same separation distance.

A total of four second coils 230a to 230d may be installed on the upper surface of the second circuit board 250 and spaced apart from each other. For example, the second coils 230a to 230d include second coils 230a and 230b for the second direction aligned parallel to the second direction, and second coils for the third direction aligned parallel to the third direction. (230c, 230d) may be included.

Another embodiment may include a second coil including one second coil for the second direction and one second coil for the third direction, and another embodiment may include three or more second coils for the second direction. coils, and three or more second coils for the third direction.

In addition, the second coils 230a to 230d may have a donut-shaped wire wound shape and may be electrically connected to the second circuit board 250 .

For example, the second coils 230a to 230d may be electrically connected to terminals 253 - 1 to 253 - 8 of the second circuit board 250 .

Next, the elastic support members 220a to 220d will be described.

The elastic supporting members 220a to 220d electrically connect the first circuit board 170 and the second circuit board 250 to each other.

The first upper surface of the first circuit board 120 includes one or more first corner regions, and the second upper surface of the second circuit board 250 includes one or more second corner regions corresponding to the first corner regions. can include At least one of the elastic support members 220a to 220d may be disposed between the first corner area and the second corner area.

The first corner area may be an area within a predetermined distance from the edge of the first upper surface of the first circuit board 120, and the second corner area may be a predetermined distance from the edge of the second upper surface of the second circuit board 250. It may be an area within a distance.

For example, the first pads 174a to 174d may be provided in a first corner region of the first circuit board 170, and the second pads 252a to 252d may be provided on the second circuit board 250. It may be provided in the corner area.

For example, one end of the elastic support members 220a to 220d may be electrically connected to the first pads 174a to 174d of the first circuit board 170, and the other end may be electrically connected to the first pads 174a to 174d of the second circuit board 250. It can be electrically connected to the two pads 252a to 252d, and the second pads 252a to 252d can be electrically connected to terminals for the first circuit board by the wiring pattern of the second circuit board 250. .

The lens driving device of FIG. 2 may include elastic support members 220a to 220d facing each other. In FIG. 13 , the number of elastic support members connecting the first corner region of each first circuit board 170 and the second corner region of the second circuit board 250 may be one.

The elastic support members 220a to 220d may have point symmetry in second and third directions perpendicular to the first direction based on the center of the housing 140 .

The number of elastic support members 220a to 220d may be greater than or equal to the number of terminals for the first circuit board.

For example, when the first position sensor 190 is an integrated hall sensor and driver, the number of elastic support members 220a to 220d may be four or more. In addition, when the first position sensor 190 is implemented as a hall sensor alone, the number of elastic support members 220a to 220d may be 6 or more.

The second pads 252a to 252d of the second circuit board 250 may be electrically connected to terminals for the first circuit board formed on the second terminal surface 250a of the second circuit board 250 .

The elastic support members 220a to 220d may serve as passages through which electrical signals move between the second circuit board 250 and the first circuit board 170, and may elastically hold the housing 140 with respect to the base 210. can be supported by

The elastic supporting members 220a to 220d may be formed as a separate member from the upper elastic member 150, and may be a member that can be supported by elasticity, for example, a leaf spring, a coil spring, It may be implemented as a suspension wire or the like. Also, in another embodiment, the elastic support members 220a to 220d may be integrally formed with the upper elastic member.

FIG. 18 is a plan view of a lens driving device according to another embodiment, and FIG. 19 is a perspective view of the lens driving device shown in FIG. 18 . In FIGS. 18 and 19, the cover member 300 is omitted.

Referring to FIGS. 18 and 19, the lens driving device 10 shown in FIG. 2 includes four elastic support members, but the elastic support members 220-1 to 220-6 shown in FIG. There may be 6 of them.

The elastic support members 220-1 to 220-6 may be point symmetrical in second and third directions perpendicular to the first direction based on the center of the housing 140.

For example, the elastic supporting members 220-1 to 220-6 are point-symmetrical in a second direction perpendicular to the first direction with respect to the center of the housing 140, the first elastic supporting members 220-1 and 220 -4), and the second elastic support members 220-2, 220-3, and 220-5 point-symmetrical in a third direction perpendicular to the first and second directions based on the center of the housing 140; 220-6) may be included.

The number of the first elastic support members 220-1 and 220-4 and the second elastic support members 220-2, 220-3, 220-5 and 220-6 may be different from each other. For example, the number of second elastic support members 220-2, 220-3, 220-5, and 220-6 may be greater than the number of first elastic support members 220-1 and 220-4.

The first elastic supporting members for the bobbin 110 in order to make the elastic forces of the elastic supporting members 220-1 to 220-6 relative to the bobbin 110 in the second and third directions symmetrical or equal. The sum of the elastic forces of the 220-1 and 220-4 and the elastic forces of the second elastic supporting members 220-2, 220-3, 220-5 and 220-6 relative to the bobbin 110 may be the same. can

For example, since the number of the second elastic supporting members 220-2, 220-3, 220-5, and 220-6 is greater than the number of the first elastic supporting members 220-1 and 220-4, the second The elastic modulus of the elastic supporting members 220-2, 220-3, 220-5, and 220-6 may be half of the elastic modulus of the first elastic supporting members 220-1 and 220-4. .

FIG. 20 is a plan view of a lens driving device according to another embodiment, and FIG. 21 is a perspective view of the lens driving device shown in FIG. 20 . In FIGS. 20 and 21, the cover member 300 is omitted.

Referring to FIGS. 20 and 21 , the number of elastic support members 220-1' to 220-8' may be eight in total. The elastic support members 220-1' to 220-8' are point-symmetrical in a second direction perpendicular to the first direction with respect to the center of the housing 140. The first elastic support members 220-1 and 220 -2, 220-5', 220-6'), and second elastic support members 220- point symmetrical in a third direction perpendicular to the first direction and the second direction based on the center of the housing 140 3', 220-4', 220-7', 220-8').

The number of the first elastic supporting members 220-1' and 220-4' and the second elastic supporting members 220-2', 220-3', 220-5' and 220-6' are the same, and , At least one of the first and second elastic support members 220-1' to 220-8' may electrically connect the first circuit board 120 and the second circuit board 250. Also, the elastic moduli of the first and second elastic support members 220-1' to 220-8' may be the same as each other.

22 is a conceptual diagram for explaining auto focusing and hand shake correction of the lens driving device 10 according to an embodiment. Coil 1 may be the second coil 230a, coil 3 may be the second coil 230b, coil 2 may be the second coil 230c, and coil 4 may be the second coil 230d. there is.

Referring to FIG. 22 , the movable part 60 may be positioned at an upper part spaced apart from the second circuit board 250 and the base 210 at an initial position.

Here, the initial position may be a position where the movable part 60 is placed as the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the movable part 60 .

For example, here, it may be desirable to set the initial position to a movement distance capable of compensating for about 0.5 ° to 1.5 °, and when converted to the focal length of the lens, the movable part of which the focal length of the lens is about 50 to 150 um ( 50).

In the case of auto focusing, the movable part 60 may include a magnet 130, a bobbin 110, and a lens (not shown) mounted on the bobbin 110, and the fixed part may include a housing 140, a cover member ( 300), a base 210, second coils 230a to 230d, and a second circuit board 250.

In addition, in the case of OIS for hand shake correction, the movable part 60 includes the magnet 130, the bobbin 110, the upper and lower elastic members 150 and 160, the first circuit board 170, and the first position sensor 190 can include On the other hand, the fixing unit may include the housing 140, the cover member 300, the base 210, and the second coils 230a to 230d.

By the electromagnetic force between the magnet 130 and the first coil 120, the movable part 60 moves in a first direction, for example, an upper direction (+Z axis direction) and a lower direction (−Z axis direction) based on the initial position. By doing so, auto focusing can be performed. For example, auto focusing may be performed by controlling the direction of current flowing through the first coil 120 . Due to this, the embodiment can be miniaturized, and the movable part 60 can be moved to a desired place with less electromagnetic force.

For example, the bobbin 110 and the base 210 may be spaced apart from each other in order to perform auto focusing in the upper and lower directions based on the initial position.

The OIS operation moves the moving part 60 in the -X axis direction, +X axis direction, -Y direction by the electromagnetic force generated between the magnet 130 and the second coils 230a to 230d based on the value measured by the gyro sensor. It moves in the axial direction or the +Y axis direction.

Each of the four second coils 230a to 230d may be driven independently. For example, the movable part 60 may be moved in the X axis and the Y axis by independently controlling the direction of the current flowing through each of the four second coils 230a to 230d. Due to this, the embodiment may be capable of image correction in a free direction.

23 shows the moving direction of the movable part 60 according to the control of the second coils 230a to 230d according to the first embodiment.

Referring to FIG. 23 , 0 in the table may mean no driving, 1 may mean driving, and may mean a difference in voltage input to the second coils 230a to 230d. For example, 0 may mean that current is not applied, and 1 may mean that current is applied to the second coil so that the electromagnetic force acts in the direction of the second coil in the movable part 60 .

Referring to FIG. 23, as the four second coils 230a to 230d are independently driven, the movable part 60 moves in the +X direction, -X direction, +Y direction, -Y direction, X+Y+ direction, It may move in any one of the X-Y+ direction, the X+Y- direction, and the X-Y- direction, or it may not move in the X-axis and Y-axis directions.

In addition, as the first coil 120 and the second coils 230a to 230d are simultaneously driven, auto focusing and OIS operations may be simultaneously performed. For example, auto focusing and OIS operations may be simultaneously performed by adjusting levels of signals provided to the first coil 120 and the second coils 230a to 230d.

24 shows the movement direction of the movable part 60 according to the control of the second coils 230a to 230d according to the second embodiment.

Referring to FIG. 24, two pairs of second coils (230a and 230b, 230c and 230d) facing each other are electrically connected, and two pairs of electrically connected second coils (230a and 230b, 230c and 230d) are electrically connected. can run independently. 0 is a case of not driving, and + and - may mean that directions of driving currents are opposite to each other.

Compared to FIG. 23 , since the two second coils are connected in FIG. 24 , a greater force can be applied to the movable part 60 . In addition, as the first coil 120 and the second coils 230a to 230d are simultaneously driven, auto focusing and OIS operations may be simultaneously performed. For example, auto focusing and OIS operations may be simultaneously performed by adjusting levels of signals provided to the first coil 120 and the second coils 230a to 230d.

25 shows the position of the movable part 60 according to the intensity of the current applied to the first coil 120 .

Referring to FIG. 25 , by controlling the strength and direction of the current applied to the first coil 120, the movable part 60 may be moved upward and downward relative to the initial position (0).

For example, an upward movement distance (eg, 200 μm) of the movable part 60 based on the initial position (0) may be greater than a downward movement distance (eg, 100 μm) of the movable part 60 . This is to ensure that current and voltage consumption values are minimized in an area of 50 cm or more, which is the area most used by users. Here, the upward movement distance may be the distance from the initial position (0) to the upper stopper of the movable part 60, and the downward movement distance may be the distance from the initial position (0) to the lower stopper of the movable part 60. .

26A to 26D show a driving algorithm for an auto focusing operation.

The horizontal axis represents the focal length, and the vertical axis represents displacement in directions parallel to the optical axis, for example, in the +Z-axis direction and -Z-axis direction. As shown in FIG. 26A, assuming that the optimal focal length for the subject is F1, a method for finding F1 may be as follows.

Referring to FIG. 26B, after moving the movable part 60 to the maximum movable point in the -Z-axis direction, the subject is photographed while moving the movable part 60 to the maximum movable point in the +Z-axis direction. to find the focal length of

Referring to FIG. 26C, after moving the movable part 60 to the maximum movable point in the +Z-axis direction, the subject is photographed while moving the movable part 60 to the maximum movable point in the -Z-axis direction. to find the focal length of

Referring to FIG. 26D, while moving the movable part 60 from the initial position (0) to the first distance (d1) in one of the +Z-axis direction and -Z-axis direction, photographing of the subject is completed, and the movable part ( 60) to the initial position (0), move the movable part 60 from the initial position (0) to the second distance (d2) to photograph the subject, and move the movable part 60 to the initial position (0) again. It is to find the optimal focal length by shooting while moving up to .

The camera module may include a lens driving device configured as described above, a lens barrel coupled to the bobbin 110, an image sensor, and a printed circuit board. In this case, an image sensor may be mounted on the printed circuit board, and the printed circuit board may form a bottom surface of the camera module.

The bobbin 110 may include a lens barrel in which at least one lens is installed, and the lens barrel may be formed to be screwed into the bobbin 110 . However, this is not limited, and although not shown, the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screw coupling, or one or more lenses may be integrally formed with the bobbin without the lens barrel. The lens may be composed of one sheet, or two or more lenses may form an optical system.

An infrared cut filter may be additionally installed in one area of the base corresponding to the image sensor and may be combined with the cover member 300 . In addition, the lower side of the cover member 300 may be supported. A separate terminal member may be installed on the base 210 to conduct electricity with the printed circuit board of the camera module, 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, protrusions may be formed downward along the 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.

Features, structures, effects, etc. 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 can be combined or modified with respect to other embodiments by a person having ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

110: bobbin 120: first coil
130: magnet 140: housing
150: upper elastic member 160: lower elastic member
210: base 230: second coil
240a, 240b: first and second position sensors 250: circuit board
300: cover member.

Claims (17)

a second circuit board;
a housing disposed on the second circuit board;
a bobbin disposed within the housing;
a magnet disposed in the housing;
a first coil disposed on the bobbin and moving the bobbin in a first direction parallel to an optical axis by interaction with the magnet; and
Including an elastic member coupled to the bobbin and the housing,
The elastic member includes a first lower elastic member and a second lower elastic member coupled to the lower part of the bobbin and the lower part of the housing,
One end of the first coil is coupled to the first lower elastic member by first solder, and the other end of the first coil is coupled to the second lower elastic member by second solder. According to claim 1,
and a first circuit board disposed on the housing and coupled to each of the first and second lower elastic members by a third solder. According to claim 2,
and a support member electrically connecting the first circuit board and the second circuit board. According to claim 2,
A lens driving device including a first position sensor electrically connected to the first circuit board and configured to detect displacement of the bobbin. According to claim 4,
The first position sensor includes a Hall sensor and a driver that communicates data. According to claim 3,
The support member includes a plurality of support members,
Each of the plurality of support members is disposed at a corresponding one of the corners of the housing. a second circuit board;
a housing disposed on the second circuit board;
a bobbin disposed within the housing;
a first coil and a magnet for moving the bobbin in a first direction parallel to the optical axis; and
Including an elastic member coupled to the bobbin and the housing,
The elastic member includes a first lower elastic member and a second lower elastic member coupled to the lower part of the bobbin and the lower part of the housing,
Each of the first and second lower elastic members includes an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connecting portion connecting the inner frame and the outer frame,
One end of the first coil is coupled to the inner frame of the first lower elastic member by first solder, and the other end of the first coil is coupled to the inner frame of the second lower elastic member by second solder. lens driving device. a second circuit board;
a housing disposed on the second circuit board;
a bobbin disposed within the housing;
a first coil and a magnet for moving the bobbin in a first direction parallel to the optical axis;
a first circuit board disposed in the housing and including a first terminal and a second terminal; and
Including an elastic member coupled to the bobbin and the housing,
The elastic member includes a first lower elastic member and a second lower elastic member coupled to the lower part of the bobbin and the lower part of the housing,
The first coil is electrically connected to the first and second lower elastic members,
The first lower elastic member is connected to the first terminal of the first circuit board by first solder, and the second lower elastic member is connected to the second terminal of the first circuit board by second solder. lens driving device. delete a second circuit board;
a housing disposed on the second circuit board;
a bobbin disposed within the housing;
a first coil and a magnet for moving the bobbin in a first direction parallel to the optical axis;
a first circuit board disposed in the housing and including a first terminal and a second terminal; and
Including an elastic member coupled to the bobbin and the housing,
The elastic member includes a first lower elastic member and a second lower elastic member coupled to the lower part of the bobbin and the lower part of the housing,
Each of the first and second lower elastic members includes an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connecting portion connecting the inner frame and the outer frame,
The outer frame of the first lower elastic member is connected to the first terminal of the first circuit board by first solder, and the outer frame of the second lower elastic member is connected to the first circuit board by second solder. A lens driving device connected to the second terminal of the board. a second circuit board;
a housing disposed on the second circuit board;
a bobbin disposed within the housing;
a first coil and a magnet for moving the bobbin in a first direction parallel to the optical axis;
a first circuit board disposed in the housing;
a first elastic member coupled to an upper portion of the bobbin and an upper portion of the housing;
a second elastic member coupled to a lower portion of the bobbin and a lower portion of the housing; and
a support member electrically connecting the first elastic member and the second circuit board;
The second elastic member electrically connects the first coil and the first circuit board,
The support member is
first and second wires disposed at a first corner of the housing;
third and fourth wires disposed at a second corner of the housing facing the first corner;
a fifth wire disposed at a third corner of the housing; and
A lens driving device comprising a sixth wire disposed at a fourth corner of the housing facing the third corner. According to claim 11,
The second elastic member includes a first area electrically connected to the first circuit board and a second area electrically connected to the first coil. delete The method of any one of claims 7, 8, 10, and 11,
The first coil is disposed on the bobbin,
The lens driving device wherein the magnet is disposed in the housing. a second circuit board;
a housing disposed on the second circuit board;
a bobbin disposed within the housing;
a magnet disposed in the housing;
a first circuit board disposed in the housing;
a first coil disposed on the bobbin and moving the bobbin in a first direction parallel to an optical axis by interaction with the magnet;
a first elastic member coupled to an upper portion of the bobbin and an upper portion of the housing; and
a support member coupled to the first elastic member and electrically connecting the first circuit board and the second circuit board;
The housing includes a buffer support having a step difference with the upper surface of the housing,
A lens driving device wherein a portion of the first elastic member is disposed on the buffer support portion. According to claim 15,
A lens driving device including a damper disposed between the buffer support and one end of the first elastic member. lens;
a lens driving device according to any one of claims 1 to 8, 10 to 12, and 15 to 16; and
A camera module including an image sensor.

Images