KR102686701B1 - Lens moving apparatus, and camera module and optical instrument including the same - Google Patents

Abstract

The embodiment includes a first side, a second side facing the first side in the first direction, a third side disposed between the first side and the second side, and a second direction perpendicular to the third side and the first direction. A housing including a fourth side facing, a bobbin disposed within the housing, a coil disposed on the bobbin and including a first coil portion and a second coil portion disposed below the first coil portion, on the first side of the housing. A magnet including a first magnet unit and a second magnet unit disposed and a third magnet unit and a fourth magnet unit disposed on the second side of the housing, and a first yoke disposed on the first side of the housing and a first yoke of the housing. It includes a second yoke disposed on the second side, and the magnet is not disposed on the third and fourth sides of the housing.

Description

Lens driving device, and camera module and optical device including the same {LENS MOVING APPARATUS, AND CAMERA MODULE AND OPTICAL INSTRUMENT INCLUDING THE SAME}

Embodiments relate to a lens driving device, and a camera module and optical device including the same.

Mobile phones or smartphones equipped with a camera module that captures a subject and saves it as an image or video are being developed. Typically, a camera module includes a lens, an image sensor module, and a voice coil motor (VCM) that performs auto focusing to adjust the focal length of the lens by adjusting the gap between the lens and the image sensor module. It can be included.

Embodiments include a lens driving device that can suppress magnetic field interference to improve electromagnetic force and ensure linearity of bobbin displacement, a camera module including the same, and an optical device.

A lens driving device according to an embodiment includes a first side, a second side facing the first side in a first direction, a third side disposed between the first side and the second side, and the third side and a housing including a fourth side facing in a second direction perpendicular to the first direction; a bobbin disposed within the housing; a coil disposed on the bobbin and including a first coil portion and a second coil portion disposed below the first coil portion; a magnet including a first magnet unit and a second magnet unit disposed on the first side of the housing, and a third magnet unit and a fourth magnet unit disposed on the second side of the housing; and a first yoke disposed on the first side of the housing and a second yoke disposed on the second side of the housing, wherein the magnet is not disposed on the third side and the fourth side of the housing. No.

The yoke may not be disposed on the third side and the fourth side of the housing. The second magnet unit is disposed below the first magnet unit, the fourth magnet unit is disposed below the third magnet unit, and the first yoke is between the first magnet unit and the second magnet unit. and the second yoke may be disposed between the third magnet unit and the fourth magnet unit. Each of the first coil unit and the second coil unit may be a coil ring surrounding the outer peripheral surface of the bobbin.

The first coil unit and the second coil unit may be connected to each other. A driving current is provided to the coil, and the direction of current flowing in the first coil unit and the direction of current flowing in the second coil unit may be in opposite directions.

The first yoke may be in contact with the first magnet unit and the second magnet unit, and the second yoke may be in contact with the third magnet unit and the fourth magnet unit.

The length of the first yoke in the second direction may be greater than the length of each of the first and second magnet units in the second direction. The length of the first yoke in the optical axis direction may be less than or equal to the length of each of the first and second magnet units in the optical axis direction. Each of the first to fourth magnet units may be a unipolar magnetization magnet.

The lens driving device includes an upper elastic member coupled to the upper part of the bobbin and the upper part of the housing; And it may include a lower elastic member coupled to the lower part of the bobbin and the lower part of the housing.

The housing may include a first through hole disposed on the first side and a second through hole disposed on the second side, and the first and second magnet units and the first yoke may be connected to the first through hole. It is disposed in the through hole, and the third and fourth magnet units and the second yoke may be disposed in the second through hole.

In the lens driving device, the lower elastic member includes a first lower spring and a second lower spring, and the coil may be electrically connected to the first and second lower springs.

The lens driving device may include a base disposed below the lower elastic member, and each of the first and second lower springs includes an inner frame coupled to the lower portion of the bobbin; an outer frame coupled to the lower portion of the housing; a frame connector connecting the inner frame and the outer frame; And it may include a connection terminal connected to the outer frame and disposed on the outer surface of the base.

At the initial position of the bobbin, a boundary area of the first coil unit and the second coil unit may overlap the first yoke in a straight line direction perpendicular to the optical axis and passing through the optical axis.

In the initial position of the bobbin, the boundary area of the first coil unit and the second coil unit may be located lower than the lower surfaces of the first and third magnet units and higher than the upper surfaces of the second and fourth magnet units. there is.

The housing includes a first stopper supporting one end of the first yoke and a second stopper supporting the other end of the first yoke; And it may include a third stopper supporting one end of the second yoke and a fourth stopper supporting the other end of the second yoke, wherein the first and second stoppers are connected to the first magnet unit and the second magnet. Located between units, the third and fourth stoppers may be disposed between the third magnet unit and the fourth magnet unit.

A lens driving device according to another embodiment includes a first side, a second side facing the first side in a first direction, a third side disposed between the first side and the second side, and the third side. a housing including a fourth side facing in a second direction perpendicular to the first direction; a bobbin disposed within the housing; a coil including a first coil portion disposed on the bobbin and a second coil portion disposed below the first coil portion; a magnet including a first magnet unit and a second magnet unit disposed on the first side of the housing, and a third magnet unit and a fourth magnet unit disposed on the second side of the housing; and a first yoke disposed between the first magnet unit and the second magnet unit and a second yoke disposed between the third magnet unit and the fourth magnet unit, and the first yoke in the second direction. The length of the yoke may be greater than the length of each of the first and second magnet units in the second direction. The length of the second yoke in the second direction may be greater than the length of each of the third and fourth magnet units in the second direction.

A camera module according to an embodiment includes a lens; A lens driving device according to any one of the above-described embodiments; and an image sensor.

The embodiment improves electromagnetic force by suppressing magnetic field interference and ensures reliability of AF drive by securing linearity of bobbin displacement.

1 is a perspective view of a lens driving device according to an embodiment.
FIG. 2 shows an exploded view of the lens driving device of FIG. 1.
FIG. 3 is a perspective view of the lens driving device of FIG. 1 with the cover member omitted.
Figure 4 is a perspective view of the bobbin shown in Figure 2.
Figure 5 is a perspective view of a bobbin and a coil combined.
Figure 6a is a first perspective view of the housing of Figure 2;
Figure 6b is a second perspective view of the housing of Figure 2;
FIG. 6C is an enlarged view of a portion of the housing of FIG. 2.
FIG. 7A is a perspective view of the housing, first to fourth magnets, and first and second yokes of FIG. 2 combined.
Figure 7b is a perspective view in another direction of Figure 7a.
Figure 8 shows the positional relationship between the first and second magnets and the coil at the initial position of the AF movable unit.
Figure 9 is a perspective view of the housing, first to fourth magnets, first and second yokes, and lower elastic member.
Figure 10 is an exploded perspective view of the base and the lower elastic member.
Figure 11 is a perspective view of the base of Figure 10 coupled with the lower elastic member.
FIG. 12 is a cross-sectional view in the AB direction of the lens driving device of FIG. 1.
Figure 13 shows an exploded perspective view of a camera module according to an embodiment.
Figure 14 shows a perspective view of a portable terminal according to an embodiment.
FIG. 15 shows a configuration diagram of the portable terminal shown in FIG. 14.

Hereinafter, embodiments of the present invention that can specifically realize the above object will be described with reference to the attached drawings.

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

In addition, relational terms such as “first” and “second”, “top/top/top” and “bottom/bottom/bottom” used below refer to any physical or logical relationship or order between such entities or elements. It does not necessarily require or imply, and may be used only to distinguish one entity or element from another entity or element. Additionally, the same reference numerals indicate the same elements throughout the description of the drawings.

In addition, terms such as “include,” “comprise,” or “have” as used above mean that the corresponding component may be included, unless specifically stated to the contrary, and thus exclude other components. It should be interpreted as being able to include other components. Additionally, terms such as “corresponding” described above may include at least one of the meanings of “opposite” or “overlapping.”

For convenience of explanation, the embodiment is described using a Cartesian coordinate system (x, y, z), but may be described using another coordinate system, and the embodiment is not limited thereto. In each drawing, the x-axis and y-axis refer to directions perpendicular to the z-axis, which is the optical axis direction. The z-axis direction, which is the optical axis direction or a direction parallel to the optical axis, is called the 'first direction', and the x-axis direction is called the 'second direction'. It may be referred to as a ‘direction’, and the y-axis direction may be referred to as a ‘third direction.’

The lens driving device according to the embodiment is an auto-focusing device that automatically focuses an image of a subject on the image sensor surface. That is, the lens driving device according to the embodiment can perform an auto-focusing operation by moving an optical module composed of at least one lens in the optical axis direction or a first direction parallel to the optical axis.

FIG. 1 is a perspective view of the lens driving device 100 according to an embodiment, FIG. 2 shows an exploded view of the lens driving device 100 of FIG. 1, and FIG. 3 shows a cover member ( This is a perspective view with 300) omitted.

Referring to FIGS. 1 to 3, the lens driving device 100 includes a bobbin (110), a coil (120), first to fourth magnets (130a to 130d), a housing (Housing (140), It may include an upper elastic member 150, a lower elastic member 160, a first yoke 192a, and a second yoke 192b.

Additionally, the lens driving device 100 may further include a cover member 300 and a base 210.

First, the cover member 300 will be described.

The cover member 300 accommodates other components 110, 120, 130, 140, 150, 160, and 192 in a receiving space formed together with the base 210.

The cover member 300 may have a box shape with an open bottom and include a top plate and side plates, and the lower ends of the side plates of the cover member 300 may be coupled to the top of the base 210. The shape of the upper plate of the cover member 300 may be polygonal, for example, square or octagonal.

The cover member 300 may have an opening in the upper plate for exposing a lens (not shown) coupled to the bobbin 110 to external light.

For example, the cover member 300 may be made of a non-magnetic material. For example, the cover member 300 may be made of a non-magnetic material such as SUS, aluminum (Al), copper (Cu), tin (Sn), platinum, etc.

By using the cover member 300 made of a non-magnetic material, the embodiment can prevent the cover member 330 from sticking to the first to fourth magnets 130a1 to 130a4.

Additionally, by using a non-magnetic cover member, the embodiment can reduce magnetic field interference with other neighboring lens driving devices, for example, lens driving devices capable of AF driving or OIS driving.

For example, in a dual camera module including an AF actuator and an OIS actuator, when the separation distance between the AF actuator and the OIS actuator is small, the cover member 300 made of a non-magnetic material is used to reduce magnetic field interference, thereby reducing the AF Malfunction of drive or OIS drive can be prevented.

In another embodiment, the cover member 300 may be a magnetic material. For example, in an embodiment in which only the lens driving device for AF is used instead of a dual camera, electromagnetic force can be improved by using a magnetic cover member.

Next, the bobbin 110 will be described.

The bobbin 110 is located in the housing 140 and can move in a first direction (eg, Z-axis direction) by electromagnetic interaction between the coil 120 and the magnet 130.

FIG. 4 is a perspective view of the bobbin 110 shown in FIG. 2, and FIG. 5 is a perspective view of the bobbin 110 and the coil 120 combined.

Referring to FIGS. 4 and 5 , a lens (not shown) may be directly coupled to the inner surface 110a 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, and the lens barrel may be coupled to the inside of the bobbin 110 in various ways.

The bobbin 110 may have an opening for mounting a lens or lens barrel. The opening shape of the bobbin 110 may match the shape of the lens or lens barrel on which it is mounted, and may be, for example, circular, oval, or polygonal, but is not limited thereto.

The bobbin 110 includes at least one first upper protrusion 113 disposed on the upper surface and coupled to and fixed to the inner frame 151 of the upper elastic member 150, and at least one first upper protrusion 113 disposed on the lower surface and inner of the lower elastic member 160. It may be provided with at least one first lower protrusion 117 coupled to and fixed to the frame 161. For example, each of the first and second upper protrusions 113 and 117 has a protrusion shape, but is not limited thereto, and may have a groove shape or a flat shape in other embodiments.

The bobbin 110 may be provided with an upper escape groove 112a provided in an area of the upper surface corresponding to or aligned with the first frame connection portion 153 of the upper elastic member 150.

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

When the bobbin 110 moves in the first direction by the upper escape groove 112a and the lower escape groove 112b of the bobbin 110, the first frame connection portion 153 and the second frame connection portion 163 and the bobbin ( 110) can be eliminated, and as a result, the first frame connection part 153 and the second frame connection part 163 can be easily elastically deformed.

The bobbin 110 may have at least one groove 105 on the outer surface 110b, and the coil 120 may be placed or seated in the groove 105 of the bobbin 110. For example, as shown in FIG. 4, the groove 105 may have a ring shape, but is not limited thereto. In another embodiment, the bobbin 110 may not have a groove for seating the coil.

The outer surface 110b of the bobbin 110 has side surfaces 110b-1 to 110b-4 corresponding to the sides 141-1 to 141-4 of the housing 140, and corner portions of the housing 140. It may include side surfaces (110c-1 to 110c-4) corresponding to (142-1 to 142-4).

As shown in Figure 1, the center 201 of the housing 140 (e.g., the center of the aperture of the housing 140) may coincide with or be aligned with the optical axis OA of the lens. there is.

Alternatively, the center of the cover member 300 (eg, the center of the opening of the cover member 300) may coincide with or be aligned with the optical axis OA of the lens.

Or, for example, the center of the bobbin 110 (or the center of the aperture of the bobbin 110) may be coincident or aligned with the optical axis OA of the lens, and may be coincident or aligned with the center of the housing 140.

Next, the coil 120 will be described.

The coil 120 is disposed on the outer surface 110b of the bobbin 110 and electromagnetically interacts with the first to fourth magnets 130a1 to 130a4 disposed in the housing 140.

A driving signal may be applied to the coil 120 to generate electromagnetic force through electromagnetic interaction with the first to fourth magnets 130a1 to 130a4. The driving signal provided at this time may be a direct current, or in the form of a voltage or current, but is not limited thereto. In other embodiments, the driving signal is an alternating current signal (e.g., a PWM signal) or an alternating current signal (e.g., a PWM signal). and direct current signals.

The AF movable part, which is elastically supported by the upper elastic member 150 and the lower elastic member 160 by electromagnetic force caused by electromagnetic interaction between the coil 120 and the first to fourth magnets 130a1 to 130a4, is the first You can move in any direction. By adjusting the electromagnetic force, the movement of the bobbin 110 in the first direction can be controlled, thereby performing an auto-focusing function.

The AF movable unit may include a bobbin 110 elastically supported by the upper elastic member 150 and the lower elastic member 160, and components mounted on the bobbin 110 and moving together with the bobbin 110. For example, the AF movable unit may include a bobbin 110 and a coil 120. Also, for example, the AF movable unit may further include a lens (not shown) mounted on the bobbin 110.

Referring to FIG. 5, the coil 120 surrounds the first coil portion 120-1 disposed to surround the outer surface 110b of the bobbin 110, and the outer surface 110b of the bobbin 110, It may include a second coil unit 120-1 that is wound or wound in a direction opposite to the first coil unit 120-1.

For example, the first coil unit 120-1 may be wound around the outer peripheral surface 110b of the bobbin 110 in a clockwise (or counterclockwise) direction based on the optical axis OA, and the second coil unit 120-2 ) may be wound around the outer peripheral surface (110b) of the bobbin 110 in a counterclockwise (or clockwise) direction based on the optical axis (OA).

One end of the first coil unit 120-1 and one end of the second coil unit 120-2 may be connected to each other. When a driving signal is applied to the other end of the first coil unit 120-1 and the other end of the second coil unit 120-2, the direction of the current flowing in the first coil unit 120-1 and the second coil unit 120-2 The direction of the current flowing in (120-2) may be in opposite directions.

In FIG. 5, the first coil unit 120-1 may be located above the second coil unit 120-2, and the first coil unit 120-1 and the second coil unit 120-2 are can come into contact with each other.

Each of the first coil unit 120-1 and the second coil unit 120-2 may be in the form of a ring-shaped coil ring. In FIG. 5 , the ring-shaped first coil unit 120-1 and the ring-shaped second coil unit 120-2 may be in contact with each other, but are not limited to this.

In another embodiment, the ring-shaped first coil unit 120-1 and the ring-shaped second coil unit 120-2 may be spaced apart from each other, and the coil 120 may be connected to the first coil unit 120-1. It may also be provided with one connection line connecting the and the second coil unit 120-2 to each other.

For example, the coil 120 may be placed or wound within the groove 105 provided on the outer surface 110b of the bobbin 110.

The coil 120 may be electrically connected to at least one of the upper elastic member 150 or the lower elastic member 160. For example, the coil 120 may be electrically connected to the lower springs 160a and 160b, and a driving signal may be applied to the coil 120 through the lower springs 160a and 160b.

Next, the housing 140 will be described.

The housing 140 supports the first to fourth magnets 130a to 130d and the first and second yokes 192a and 192b, and allows the AF movable part, for example, the bobbin 110, to move in the first direction. The bobbin 110 is accommodated on the inside so that

FIG. 6A is a first perspective view of the housing 140 of FIG. 2, FIG. 6B is a second perspective view of the housing 140 of FIG. 2, FIG. 6C is a partially enlarged view of the housing 140 of FIG. 2, and FIG. 7A is a perspective view of the housing 140, the first to fourth magnets 130a1 to 130a4, and the first and second yokes 192a and 192b of FIG. 2 combined, and FIG. 7b is a view of the housing 140 of FIG. 2 in a different direction from FIG. 7a. It is a perspective view, FIG. 8 shows the positional relationship between the first and second magnets and the coil 120 at the initial position of the AF movable unit, and FIG. 12 is a cross-sectional view in the AB direction of the lens driving device 100 of FIG. 1.

Referring to FIGS. 6A to 7B, the housing 140 may be in the form of a pillar with an opening, and has a plurality of side portions 141-1 to 141-4 and corner portions 142-1 to 142- that form the opening. 4) may be included.

For example, the housing 140 has a plurality of side portions 141-1 to 141-4 and corner portions 142-1 to 142-4 that form polygonal (e.g., square, or octagonal) or circular openings. can do. The upper surfaces of the plurality of side portions 141-1 to 141-4 and the corner portions 142-1 to 142-4 may form the upper surface of the housing 140, and the plurality of side portions 141-1 to 142-4 may form the upper surface of the housing 140. The outer surfaces of (141-4) and the corner portions (142-1 to 142-4) may form the outer surface of the housing 140.

For example, the housing 140 may include side portions 141-1 to 141-4 spaced apart from each other and corner portions 142-1 to 142-4 spaced apart from each other. Each of the corner portions 142-1 to 142-4 may be disposed between two adjacent side portions.

For example, the horizontal length of each of the side portions 141-1 to 141-4 of the housing 140 may be longer than the horizontal length of each of the corner portions 142-1 to 142-4 of the housing 140. there is.

First to fourth magnets 130a to 130a4 may be disposed or installed on the first and second sides 141-1 to 141-2 of the housing 140 facing each other.

For example, a first seating groove 141a may be provided on the first side 141-1 of the housing 140 for seating, placing, or fixing the first and second magnets 130a1 and 130a2.

Additionally, a second seating groove 141b may be provided on the second side 141-2 of the housing 140 for seating, placing, or fixing the third and fourth magnets 130a3 and 130a4. The first side 141-1 and the second side 141-2 of the housing 140 may face or face each other.

In Figure 6a, each of the first and second seating grooves 141a and 141b is in the form of a through hole penetrating the first and second sides 141-1 and 141-2 of the housing 140, but is limited thereto. No, in other embodiments, it may have a groove shape.

Referring to FIGS. 6B and 6C, the first side 41a of the first seating groove 141a is provided with a first support portion for supporting an area of the first side of the first and second magnets 130a and 130b. (61a) can be provided.

The first support portion 61a may protrude from the fourth corner portion 142-4 toward the first corner portion 142-1 based on the first side 41a of the first seating groove 141a. there is. Additionally, the first support portion 61a may contact the inner surface of the housing 140 adjacent to the first side of the first seating groove 141a.

For example, the first side of each of the first and second magnets 130a and 130b may be one side facing the outer surface of the bobbin 110 or one side facing the outer surface of the bobbin 110.

A second support portion 61b may be provided on the second side of the first seating groove 141a to support another area of the first side of the first and second magnets 130a and 130b.

The second support portion 61b may protrude from the first corner portion 142-1 toward the fourth corner portion 142-4 based on the second side of the first seating groove 141a. Additionally, the second support portion 61b may contact the inner surface of the housing 140 adjacent to the second side of the first seating groove 141a.

For example, the second side of the first seating groove 141a may be the side facing the first side 41a of the first seating groove 141a.

A first stopper 62a may be provided on the first side 41a of the first seating groove 141a, and a second stopper 62b may be provided on the second side of the first seating groove 141a. .

The first stopper 62a may be located between the top and bottom of the first side 41a of the first seating groove 141a, and the second stopper 62b may be located between the top and bottom of the first side 41a of the first seating groove 141a. It can be located between the top and bottom of .

The first stopper 62a may protrude from the first side 41a, and one end of the first stopper 62b may contact the first support portion 61a. Additionally, the second stopper 62b may protrude from the second side, and one end of the second stopper 62b may contact the second support portion 61b.

The first stopper 62a may be located between one end of the first magnet 130a1 disposed in the first seating groove 141a and one end of the second magnet 130a2, and the second stopper 62b may be located between the first end of the magnet 130a1 and the second magnet 130a2. It may be located between the other end of the magnet (130a1) and the other end of the second magnet (130a2).

A space in which the first yoke 192a can be inserted, placed, or seated may be provided between the first magnet 130a1 and the second magnet 130a2 by the first and second stoppers 62a and 62b. there is.

One end or one side (63a, 63b) of each of the first and second stoppers (62a, 62b) has a first step from the outer surface (45) of the housing (140), for example, the outer surface (or corner portion). You can have (DP).

Each of the first and second stoppers 62a and 62b supports the first yoke 192a and can prevent the first yoke 192a from leaving or intruding into the inside of the housing 140.

For example, the first stopper 62a may support one end of the first yoke 192a, and the second stopper 62b may support the other end of the first yoke 192a.

The height or length H1 of each of the first and second stoppers 62a and 62b in the optical axis OA direction may be equal to or greater than the height of the first yoke 192a or the length in the optical axis direction.

The first step DP may be equal to or greater than the thickness of the first yoke 192a. This is to prevent spatial interference between the first yoke 192a and the cover member 300 by preventing the first yoke 192a from protruding outside the outer surface 45 of the housing 140.

A first groove 16a may be provided on the first side 41a of the first seating groove 141a and corresponds to the first stopper 62a or/and is in contact with the first stopper 62a. A second groove 16b may be provided on the second side of the groove 141a, corresponding to the second stopper 62b and/or in contact with the second stopper 62b.

In order to facilitate installation of the first yoke 192a, each of the first groove 16a and the second groove 16b may have an opening that opens to the outer surface 45 of the housing 140.

One end of the first yoke 192a may be seated, inserted, or placed in the first groove 16a, and the other end of the first yoke 192a may be seated, inserted, or placed in the second groove 16b. there is.

The length of the first yoke 192a in the direction from the fourth corner 142-4 of the housing 140 toward the first corner 142-1 extends from the fourth corner 142-4 to the first corner. When it is longer than the length of the first and second magnets 130a1 and 130a2 in the direction toward the unit 142-1, the first yoke 192a is moved to the housing by the first and second grooves 16a and 16b. 140).

Referring to FIGS. 6B and 6C, a third support portion will be provided on the first side of the second seating groove 141b to support one area of the first side of the third and fourth magnets 130a3 and 130a4. You can.

The third support portion may protrude from the third corner portion 142-3 toward the second corner portion 142-2 based on the first side of the second seating groove 141b. Additionally, the third support portion may contact the inner surface of the housing 140 adjacent to the first side of the second seating groove 141b.

For example, the first side of each of the third and fourth magnets 130a3 and 130a4 may be one side facing the outer surface of the bobbin 110 or one side facing the outer surface of the bobbin 110.

A fourth support portion may be provided on the second side of the second seating groove 141b to support another area of the first side of the third and fourth magnets 130a3 and 130a4.

The fourth support portion may protrude from the second corner portion 142-2 toward the third corner portion 142-3 based on the second side of the second seating groove 141b. Additionally, the fourth support portion may contact the inner surface of the housing 140 adjacent to the second side of the second seating groove 141b.

For example, the second side of the second seating groove 141b may be a side facing the first side of the second seating groove 141b.

A third stopper may be provided on the first side of the second seating groove 141b, and a fourth stopper may be provided on the second side of the second seating groove 141b. The description of the first and second stoppers may be applied or applied mutatis mutandis to the third and fourth stoppers.

That is, the third stopper may be located between the top and bottom of the first side of the second seating groove (141b), and the fourth stopper may be located between the top and bottom of the second side of the second seating groove (141b). You can.

The third stopper may protrude from the first side of the second seating groove 141b, and one end of the third stopper may contact the second support portion 61b. Additionally, the fourth stopper may protrude from the second side of the second seating groove 141b, and one end of the fourth stopper may contact the second support portion 61b.

The third stopper may be located between one end of the third magnet (130a3) and one end of the fourth magnet (130a4) disposed in the second seating groove (141b), and the fourth stopper may be positioned at the other end of the third magnet (130a3). It may be located between one end and the other end of the fourth magnet 130a4.

A space into which the second yoke 192b can be inserted, placed, or seated may be provided between the third magnet 130a3 and the fourth magnet 130a4 by the third and fourth stoppers.

One end or one side of each of the third and fourth stoppers may have a step from the outer surface of the housing 140, for example, the outer surface of the side (or corner portion).

Each of the third and fourth stoppers supports the second yoke 192b and can prevent the second yoke 192b from leaving or intruding into the inside of the housing 140.

For example, the third stopper may support one end of the second yoke 192b, and the fourth stopper may support the other end of the second yoke 192b.

The height or length in the optical axis (OA) direction of each of the third and fourth stoppers may be equal to or greater than the height or length in the optical axis direction of the second yoke (192b).

The second step may be equal to or greater than the thickness of the second yoke 192b. This is to prevent spatial interference between the second yoke 192b and the cover member 300 by preventing the second yoke 192b from protruding outside the outer surface of the housing 140.

A third groove corresponding to or/and in contact with the third stopper may be provided on the first side of the second seating groove 141b, and a fourth stopper may be provided on the second side of the second seating groove 141b. A fourth groove may be provided corresponding to or/and in contact with the fourth stopper.

To facilitate installation of the second yoke 192b, each of the third and fourth grooves may have an opening that opens to the outer surface of the housing 140.

One end of the second yoke 192b may be seated, inserted, or placed in the third groove, and the other end of the second yoke 192b may be seated, inserted, or placed in the fourth groove.

The length of the second yoke 192b in the direction from the fourth corner 142-4 of the housing 140 toward the first corner 142-1 extends from the fourth corner 142-4 to the first corner. When it is longer than the length of the third and fourth magnets 130a3 and 130a4 in the direction toward the unit 142-1, the second yoke 192b is seated in the housing 140 by the third and fourth grooves. You can.

In the first to fourth stoppers, the term “stopper” may be used instead of a step, a protrusion, or a partition.

In Figure 6a, one seating groove is provided on each of the first side 141-1 and the second side 141-2 of the housing 140, but this is not limited to this, and in another embodiment, the housing 140 Two seating grooves may be provided on each of the first side 141-1 and the second side 141-2, and each of the first and second magnets 130a1 and 130a2 is attached to the first side 141-1. ) may be disposed in a corresponding one of the two seating grooves provided in the third and fourth magnets 130a3 and 130a4, respectively, in a corresponding one of the two seating grooves provided in the second side 141-2. It can be placed in any of the following.

Additionally, a step portion 29 having a step difference from the upper surface of the housing 140 in the optical axis direction may be provided at each of the corner portions 142-1 to 142-4 of the housing 140. The step portion 29 is a portion corresponding to the injection gate for injection molding of the housing, and is intended to exclude spatial interference with burs generated as a result of injection molding.

The housing 140 may be provided with a first stopper 143 protruding from the top or upper surface.

The first stopper 143 of the housing 140 is to prevent the cover member 300 from colliding with the housing 140, and when an external impact occurs, the upper surface of the housing 140 is in contact with the upper surface of the cover member 300. It can prevent direct collision with the inner surface.

Additionally, a second upper protrusion 144 to which the outer frame 152 of the upper elastic member 150 is coupled may be provided on the top or upper surface of the housing 140. For example, the second upper protrusion 144 may be disposed on the upper surface of at least one of the corner portions 142-1 to 142-4 of the housing 140, but is not limited thereto, and in another embodiment, the housing 140 ) may be disposed on the upper surface of at least one of the side portions 141-1 to 141-4.

A second lower protrusion 147 to which the outer frame 162 of the lower elastic member 160 is coupled may be provided on the lower or lower surface of the housing 140. For example, the second lower protrusion 147 is located on the lower or lower surface of at least one of the side portions 141-1 to 141-4 and/or the corner portions 142-1 to 142-4 of the housing 140. can be placed in

In addition, the lower or lower surface of the corner portions 142-1 to 142-4 of the housing 140 may be provided with a guide groove 148 into which the guide member 216 of the base 210 is inserted, fastened, or coupled. . The guide groove 148 of the housing 140 and the guide member 216 of the base 210 may be coupled to each other by an adhesive member (not shown), and the housing 140 may be coupled to the base 210.

Next, the first to fourth magnets 130a1 to 130a4 will be described.

Referring to FIGS. 6A and 7A , the first and second magnets 130a1 and 130a2 may be arranged to be spaced apart from each other on the first side 141-1 of the housing 140.

The first magnet 130a1 may face the first coil unit 120-1, and the second magnet 130a2 may face the second coil unit 120-2. The first magnet 130a1 may be located above the second magnet 130a2.

For example, the first and second magnets 130a1 and 130a2 may be disposed in the first seating groove 141a of the first side 141-1 of the housing 140.

The third and fourth magnets 130a3 and 130a4 may be arranged to be spaced apart from each other on the second side 141-2 located on the opposite side of the first side 141-1 of the housing 140.

The third magnet 130a3 may face the first coil unit 120-1, and the fourth magnet 130a4 may face the second coil unit 120-2. The third magnet 130a3 may be located above the fourth magnet 130a4.

For example, the third and fourth magnets 130a3 and 130a4 may be disposed in the second seating groove 141b of the second side 141-2 of the housing 140.

In another embodiment, seating grooves are not formed in the first and second sides 141-1 and 141-2 of the housing 140, and the first and second magnets 130a1 and 130a2 are located in the housing 140. It may be disposed on either the outer or inner side of the first side 141-1, and the third and fourth magnets 130a3 and 130a4 are located on the second side 141-2 of the housing 140. It may be placed on either the outer or inner side of.

The shape of each of the first to fourth magnets 130a1 to 130a4 may have a polyhedral shape, for example, a rectangular parallelepiped shape, but is not limited thereto.

Each of the first to fourth magnets 130a1 to 130a4 may be a unipolar magnetizing magnet having one N pole and a corresponding S pole.

For example, the polarity of the first surface of the first magnet 130a1 facing the coil 120 and the polarity of the first surface of the second magnet 130a2 facing the coil 120 may be opposite to each other.

For example, the first surface of the first magnet 130a1 may be the S pole (or N pole), and the first side of the second magnet 130a1 may be the N pole (or S pole).

Additionally, the polarity of the first surface of the third magnet 130a3 facing the coil 120 and the polarity of the first surface of the fourth magnet 130a4 facing the coil 120 may be opposite to each other.

For example, the first surface of the third magnet 130a3 may be the S pole (or N pole), and the first surface of the fourth magnet 130a4 may be the N pole (or S pole).

The first magnet 130a1 and the second magnet 130a2 may overlap each other in the optical axis direction, and the third magnet 130a3 and the fourth magnet 130a4 may overlap each other in the optical axis direction.

For example, in the optical axis direction, the N pole of the first magnet (130a1) and the S pole of the second magnet (130a2) may overlap each other, and in the optical axis direction, the S pole of the first magnet (130a1) and the second magnet (130a2) The N poles of can overlap each other. In addition, in the optical axis direction, the N pole of the third magnet (130a3) and the S pole of the fourth magnet (130a4) may overlap each other, and in the optical axis direction, the S pole of the third magnet (130a3) and the fourth magnet (130a4) may overlap each other. The N poles can overlap each other.

In the embodiment, first to fourth magnets 130a1 are installed on the first and second sides 141-1 and 141-2 of the housing 140 to reduce magnetic field interference with a neighboring camera module or lens driving device. 130a4) may be disposed, and magnets may not be disposed on the third and fourth sides 141-3 and 141-4 of the housing 140, but the present invention is not limited thereto.

In another embodiment, in order to increase electromagnetic force, magnets are of the same shape on the third and fourth sides (141-3, 141-4) in addition to the first and second sides (141-1, 141-2) of the housing 140. It may also be placed as .

The first surface of each of the first to fourth magnets 130a1 to 130a4 facing the coil 120 may be formed as a flat surface, but this is not limited and may also be formed as a curved surface.

Additionally, at least one of the corners of each of the first to fourth magnets 130a1 to 130a4 may be rounded or have a curved surface.

Referring to FIG. 8, the first length (Q1, see FIG. 8) and the second length (Q2, see FIG. 8) of each of the first to fourth magnets 130a1 to 130a4 are 0.4 [mm] to 0.8 [mm]. mm]. For example, the first length Q1 and the second length Q2 of each of the first to fourth magnets 130a1 to 130a4 may be 0.64 [mm].

The first length Q1 may be a length in the optical axis direction, and the second length Q2 may be a length in the direction from the first surface to the second surface of each of the first to fourth magnets 130a1 to 130a4. It can be. The first surface of each of the first to fourth magnets 130a1 to 130a4 may be a surface facing the coil 120, and the second surface of each of the first to fourth magnets 130a1 to 130a4 may be the first surface. It may be the opposite side of .

Next, the first yoke 192a and the second yoke 192b will be described.

The first yoke 192a may be disposed on the first side 141-1 of the housing 140 and may be located between the first magnet 130a1 and the second magnet 130a2.

Each of the first and second yokes 192a and 192b may have a polyhedral shape, for example, a rectangular parallelepiped shape, but is not limited thereto.

For example, the upper surface of the first yoke (192a) may be in contact with the lower surface of the first magnet (130a1), and the lower surface of the first yoke (192a) may be in contact with the upper surface of the second magnet (130a2), but this is not limited. no.

For example, the first yoke 192a may be placed in the first seating groove 141a of the housing 140 and may be supported by the first stopper 62a and the second stopper 62b.

Additionally, the second yoke 192b may be disposed on the second side 141-2 of the housing 140 and may be located between the third magnet 130a3 and the second magnet 130a4.

For example, the upper surface of the second yoke (192b) may be in contact with the lower surface of the third magnet (130a3), and the lower surface of the second yoke (192b) may be in contact with the upper surface of the fourth magnet (130a4), but this is not limited. no.

For example, the second yoke 192b may be disposed in the second seating groove 141b of the housing 140 and may be supported by the third stopper and the fourth stopper.

Referring to FIG. 7A, in order to improve the electromagnetic force due to interaction with the coil 120, the length L1 of the first yoke 192a is the length of each of the first magnet 130a1 and the second magnet 130a2 ( It may be longer than L2) (L1>L2), but it is not limited thereto, and in other embodiments, the lengths of both may be the same. In another embodiment, the length of the first yoke 192a may be shorter than the length of the first and second magnets 130a1 and 130a2.

For example, L1 and L2 are from one corner of the housing 140 adjacent to one side of the first side 141-1 of the housing 140 to the other side of the first side 141-1 of the housing 140. It may be a length in a direction toward another corner of the housing 140 adjacent to the side.

For example, L1 may be the length of the first yoke 192a in the direction from the first corner 142-1 of the housing 140 toward the fourth corner 142-4, and L2 may be the length of the housing 140. ) may be the length of each of the first magnet 130a1 and the second magnet 130a2 in the direction from the first corner portion 142-1 to the fourth corner portion 142-4.

Or, for example, L1 may be the length in the longitudinal direction of the first yoke 192a, and L2 may be the length in the longitudinal direction of each of the first magnet 130a1 and the second magnet 130a2.

In addition, in order to improve the electromagnetic force due to interaction with the coil 120, the length of the second yoke 192b in the direction from the second corner portion 142-2 to the third corner portion 142-3 is It may be longer than the length of each of the third magnets 130a3 and the fourth magnets 130a4 in the direction from the second corner portion 142-2 to the third corner portion 142-3, but is not limited thereto. In another embodiment, both lengths may be the same. In another embodiment, the length of the second yoke 192b may be shorter than the length of the third and fourth magnets 130a3 and 130a4. The description of the longitudinal directions of L1 and L2 described above may be applied equally or similarly to the second yoke 192b and the third and fourth magnets 130a3 and 130a4.

The first yoke 192a provides magnetic field interference to the second coil unit 120-1 due to the magnetic fields of the first and third magnets 130a1 and 130a3, and the second and fourth magnets 130a2 and 130a4. It may serve to suppress magnetic field interference to the first coil unit 120-2 caused by the magnetic field.

Additionally, by suppressing such magnetic field interference, the electromagnetic force between the first magnet 130 and the first coil 120 can be improved, and the electromagnetic force between the first magnet 130 and the second coil 230 can be improved.

By suppressing such magnetic field interference, electromagnetic force between the first to fourth magnets 130a1 to 130a4 and the coil 120 can be improved.

Each of the first yoke 192a and the second yoke 192b may be made of non-magnetic metal. For example, the first and second yokes 192a and 192b may be made of SUS (Steel Use Stainless) material, such as SUS 420 or SUS 430.

Or, for example, the first yoke 192a and the second yoke 192b may be magnetic materials.

Referring to FIG. 8, the length P1 of the first yoke 192a in the optical axis direction may be smaller than the length Q1 of each of the first and second magnets 130a1 and 130a2 in the optical axis direction, but is limited to this. This does not mean that, in another embodiment, the length (P1) of the first yoke (192a) in the optical axis direction and the length (Q1) of each of the first and second magnets (130a1 and 130a2) may be the same.

The first length P1 of the first yoke 192a may be greater than or equal to the second length P2 of the first yoke 192a. Additionally, the first length of the second yoke 192 may be greater than or equal to the second length of the second yoke 192b.

The first length (P1, see FIG. 8) of each of the first and second yokes (192a, 192b) may be a length in the optical axis direction, and the second length of each of the first and second yokes (192a, 192b) may be a length in the optical axis direction. The length P2 may be a length in a direction from the first side of each of the first and second yokes 192a and 192b to the second side.

The first surface of each of the first and second yokes 192a and 192b may be a surface facing the coil 120, and the second surface of each of the first and second yokes 192a and 192b may be the first surface. It may be the opposite side of .

The second length P2 of each of the first and second yokes 192a and 192b may be smaller than the second length Q2 of each of the first and second magnets 130a1 and 130a2 (P2<Q2). . However, it is not limited to this, and in another embodiment, the second length (P2) of each of the first and second yokes (192a, 192b) is the second length (P2) of each of the first and second magnets (130a1, 130a2) It may be the same as Q2).

The first length P1 of each of the first and second yokes 192a and 192b may be 0.25 [mm] to 0.6 [mm]. For example, P1 may be 0.4 [mm]. If the first length P1 is less than 0.25 [mm], the durability of the first and second yokes 192a and 192b may be weakened and they may be easily bent. In addition, when the first length P1 is greater than 0.6 [mm], the overlap range between the coil 120 and the first to fourth magnets in the horizontal direction is reduced, thereby reducing electromagnetic force, which may deteriorate the reliability of AF driving.

Additionally, the second length P2 of each of the first and second yokes 192a and 192b may be 0.25 [mm] to 0.6 [mm]. For example, P2 may be 0.25 [mm]. If the second length P2 is less than 0.25 [mm], the durability of the first and second yokes 192a and 192b may be weakened and they may be easily bent. In addition, when the second length P2 is greater than 0.6 [mm], spatial interference between the first and second yokes 192a and 192b and the coil 120 or/and the first and second yokes 192a and 192b ) and the cover member 300 may cause spatial interference.

Next, with reference to FIGS. 8 and 12 , the positional relationship between the first and second magnets 130a1 and 130a2 and the coil 120 will be described. The description of the positional relationship between the first and second magnets 130a1 and 130a2 and the coil 120 in FIG. 8 is the same as the positional relationship between the third and fourth magnets 130a3 and 130a4 and the coil 120. It can be applied.

Referring to FIGS. 8 and 12, at the initial position of the AF movable unit, for example, the initial position of the bobbin 110, the first to fourth magnets 130a1 to 130a2 disposed in the housing 140 are coiled in the horizontal direction. It may overlap with at least part of 120). For example, the horizontal direction may be perpendicular to the optical axis and parallel to a straight line passing through the optical axis.

Here, the initial position of the bobbin 110 is the initial position of the AF movable part without power being applied to the coil 120, or the upper and lower elastic members 150 and 160 are elastically deformed only by the weight of the AF movable part. It may be the position where the movable part is placed.

In addition, the initial position of the bobbin 110 is the position at which the AF movable part is placed when gravity acts in the direction from the bobbin 110 to the base 210, or, conversely, when gravity acts in the direction from the base 210 to the bobbin 110. It can be.

At the initial position of the bobbin 110, each of the first and third magnets 130a1 and 130a3 disposed in the housing 140 may overlap at least a portion of the first coil portion 120-1 in the horizontal direction.

At the initial position of the bobbin 110, each of the second and fourth magnets 130a2 and 130a4 disposed in the housing 140 may overlap at least a portion of the second coil portion 120-2 in the horizontal direction.

In order to increase the driving by the interaction between the first to fourth magnets 130a1 to 130a4 and the coil 120 and at the same time ensure the linearity of the displacement of the AF moving part according to the driving signal (driving current), the first and fourth magnets 130a1 to 130a4 and the coil 120 are increased. The positional relationship between the second magnets 130a1 and 130a2 and the coil 120 may be as follows.

At the initial position of the bobbin 110, the boundary area 121 of the first coil part 120-1 and the second coil part 120-2 is the lower surface of the first and third magnets 130a1 and 130a3 ( 131) and may be located higher than the upper surface 132 of the second and fourth magnets 130a2 and 130a4.

For example, the boundary area 121 may be a boundary line, boundary surface, or boundary portion that separates the first coil unit 120-1 and the second coil unit 120-2.

Also, at the initial position of the bobbin 110, the boundary area 121 of the first coil unit 120-1 and the second coil unit 120-2 is horizontal with the first and second yokes 192a and 192b. Can overlap directionally.

This reduces the influence of the magnetic field of the first magnet (130a1) on the second coil unit (120-2) and the magnetic field of the second magnet (130a2) on the first coil unit (120-1), thereby reducing magnetic field interference. As a result, the influence of electromagnetic force for AF driving is reduced, and thus linearity of the displacement of the AF moving part according to the driving signal (driving current) can be secured, and the reliability of auto focusing can be secured.

The first yoke 192a may overlap at least a portion of each of the first and second magnets 130a1 and 130a2 in the optical axis direction. The second yoke 192b may overlap at least a portion of each of the third and fourth magnets 130a3 and 130a4 in the optical axis direction.

Also, for example, the first yoke 192a and the second yoke 192b may be located or disposed at the same height.

The boundary area 121 of the first coil unit 120-1 and the second coil unit 120-2 is located below the center 18a of the first yoke 192a and the center of the second yoke 192b. This can ensure linearity of the displacement of the AF moving part according to the driving signal (driving current) and ensure the reliability of auto focusing. For example, the center of the first yoke (192a) may be a point located in the center between the upper and lower surfaces of the first yoke (192a), and the center of the second yoke (192b) may be the upper and lower surfaces of the second yoke (192b). It may be a point located in the center between the two sides.

At the initial position of the bobbin 110, the length M2 in the optical axis direction where the first coil portion 120-1 and the first magnet 130a1 overlap is the length in the optical axis direction of the first magnet 130a1 ( It may be less than 50% of M1).

In addition, the length in the optical axis direction where the first coil portion 120-1 and the third magnet 130a3 overlap at the initial position of the bobbin 110 is 50% or less of the length in the optical axis direction of the third magnet 130a1. You can.

In the lens driving device 110 according to an embodiment, the maximum movement distance (or movable distance) of the bobbin 110 in the front (or upward direction) is the maximum movement distance of the bobbin 110 in the rear (or downward direction). (or the distance that can be moved).

For example, the position of the bobbin 110 where the lens mounted on the bobbin 110 has the first focal length (Infinity) may be -30 [㎛] from the initial position of the bobbin 110, and the bobbin 110 The position of the bobbin 110 where the lens mounted on has the second focal length (Macro) may be +250 [㎛] to +280 [㎛] from the initial position of the bobbin 110. Here, a negative number may mean backward, and + may mean forward.

In the case where the bobbin 110 is displaced, the boundary area 121 of the first coil unit 120-1 and the second coil unit 120-2 is 18a at the center of the first yoke 192a. ), the loss of electromagnetic force due to movement of the bobbin 110 can be suppressed, and linearity of displacement of the AF movable part can be secured.

In addition, at the initial position of the bobbin 110, the length in the optical axis direction where the first coil portion 120-1 and the third magnet 130a3 overlap is 50% of the length in the optical axis direction of the third magnet 130a3. It may be below, and as a result, linearity of the displacement of the AF movable part according to the driving signal (driving current) can be secured and reliability of auto focusing can be secured.

For example, the separation distance (K) in the optical axis direction between the lower surface 131 of the first magnet 130a1 and the upper surface 132 of the second magnet 130a2 may be 0.25 [mm] to 0.6 [mm]. For example, K may be 0.4 [mm].

In order to secure the linearity of the displacement of the AF moving part according to the driving signal (driving current) and to ensure the reliability of auto focusing, the first coil part 120-1 and the second coil are connected at the initial position of the bobbin 110. The separation distance (T) in the optical axis direction between the boundary area 121 of the part 120-2 and the extension of the upper surface 132 of the second magnet 130a2 is the distance between the first magnet 130a1 and the second magnet 130a2. It may be more than 12.5% and less than 50% of the separation distance (K) in the direction of the optical axis of the liver.

If the separation distance (T) is less than 12.5%, the influence of magnetic field interference of the second and fourth magnets 130a2 and 130a4 on the first coil unit 120-1 may increase, resulting in poor linearity, and the separation distance When (T) exceeds 50%, the influence of magnetic field interference of the first and third magnets 130a1 and 130a3 on the second coil unit 120-1 increases, and the bobbin 110 toward the front increases. Electromagnetic force for AF driving may decrease due to movement.

For example, to ensure linearity considering the weight of the lens mounted on the bobbin 110, the first separation distance (T) may be 12.5% or more and 40% or less of the separation distance (K). Or, for example, the first separation distance (T) may be 25% or more and 35% or less of the separation distance (K).

As described above, the first yoke 192a is disposed between the first and second magnets 130a1 and 130a2, and the second yoke 192b is disposed between the third and fourth magnets 130a3 and 130a4. By being disposed, a decrease in magnetic flux generated in the horizontal direction from the first to fourth magnets 130a1 to 130a2 can be suppressed, thereby preventing a decrease in electromagnetic force due to leakage magnetic flux.

Additionally, in the case of a dual camera, the reliability of AF driving or OIS driving may deteriorate due to magnetic field interference between magnets included in two adjacent lens driving devices. In order to suppress such magnetic field interference, a structure can be adopted in which one or both ends of the magnet are cut into a chamfer shape. However, the adoption of this structure increases the unit cost of the chamfering process, reduces the magnetic force, and reduces AF sensitivity due to this. lowering, and assembly workability may deteriorate.

However, in the case of a dual camera, the embodiment can reduce magnetic field interference to the magnet of an adjacent lens driving device by the first and second yokes 192a and 192b, and as a result, the magnets and yokes, etc. It can be placed symmetrically in the center of the housing relative to the optical axis without having to be biased to one side, and the reliability of AF operation or OIS (Optical Image Stabilizer) operation due to magnetic field interference can be secured.

In general, when the surrounding temperature of the first to fourth magnets 130a1 to 130a4 increases, demagnetization due to heat may occur, which may reduce the sensitivity of the AF moving unit.

However, when the first and second yokes 192a and 192b are provided, a decrease in the sensitivity of the AF movable unit due to demagnetization of the first to fourth magnets 130a1 to 130a4 due to heat can be suppressed. This is because demagnetization of the first to fourth magnets 130a1 to 130a4 is suppressed by the first and second yokes 192a and 192b.

Therefore, the embodiment can suppress demagnetization of the first to fourth magnets 130a1 to 130a4 due to heat, thereby reducing electromagnetic force due to interaction between the coil 120 and the first to fourth magnets 130a1 to 130a4. This reduction can be suppressed, and accurate AF drive can be performed.

In addition, since the embodiment is provided with four unipolar magnets 130a1 to 130a4, when one magnet is provided on each of the first and second sides 9141- and 141-2 of the housing 140 (e.g. , Compared to Case 1), electromagnetic force can be improved. For example, the embodiment can achieve an electromagnetic force increase effect of about 6% compared to Case 1.

In a lens driving device according to another embodiment, the maximum movement distance (or movable distance) of the bobbin 110 toward the rear (or downward direction) is the maximum movement distance (or distance that can be moved) of the bobbin 110 toward the front (or upward direction). distance that can be moved), in which case the following explanation can be applied.

For example, at the initial position of the bobbin 110, the length in the optical axis direction where the second coil portion 120-2 and the second magnet 130a2 overlap is 50 times the length in the optical axis direction of the second magnet 130a2. It may be less than %. In addition, the length in the optical axis direction where the second coil portion 120-2 and the fourth magnet 130a4 overlap at the initial position of the bobbin 110 is 50% or less of the length in the optical axis direction of the fourth magnet 130a4. You can.

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 are coupled to the bobbin 110 and the housing 140 and elastically support the bobbin 110.

9 is a perspective view of the housing 140, the first to fourth magnets 130a1, to 130a4, the first and second yokes 192a and 1292b, and the lower elastic member 160, and FIG. 10 shows the base. It is a separated perspective view of 210 and the lower elastic member 160, and FIG. 11 is a combined perspective view of the base 210 and the lower elastic member 160 of FIG. 10.

2, 3, and 9 to 11, the upper elastic member 150 may be coupled to the top, upper surface, or upper end of the bobbin 110 and the upper, upper surface, or upper end of the housing 140. and the lower elastic member 160 may be coupled to the lower, lower, or lower end of the bobbin 110 and the lower, lower, or lower end of the housing 140.

The upper elastic member 150 shown in FIGS. 2 and 3 consists of a single upper spring, but is not limited thereto. In another embodiment, the upper elastic member includes a plurality of upper springs that are spaced apart or separated from each other. can do.

The upper elastic member 150 and the lower elastic member 160 may be implemented as leaf springs, but are not limited thereto, and may also be implemented as coil springs, suspension wires, etc.

The upper elastic member 150 includes a first inner frame 151 coupled to the first upper protrusion 113 of the bobbin 110, and a first outer frame coupled to the second upper protrusion 144 of the housing 140 ( 152), and a first frame connection portion 153 connecting the first inner frame 151 and the first outer frame 152.

2 and 3, the upper elastic member 150 is implemented as one upper spring, but the present invention is not limited thereto, and may include two or more upper springs in other embodiments.

For example, the first inner frame 151 of the upper elastic member 150 may be provided with a through hole or groove coupled to the first upper protrusion 113 of the bobbin 110, and the first outer frame 152 may be provided. A through hole or groove coupled to the upper protrusion 144 of the housing 140 may be provided.

The lower elastic member 160 may include first and second lower springs 160a and 160b spaced apart from each other. The first and second lower springs 160a and 160b may be electrically separated from each other.

The first and second lower springs 160a and 160b each have a second inner frame 161 coupled to the first lower protrusion 114 of the bobbin 110 and a second lower protrusion 147 of the housing 140. It may include a second outer frame 162 coupled to and a second frame connection portion 163 connecting the second inner frame 161 and the second outer frame 162.

For example, the second inner frame 161 of each of the first and second lower springs 160a and 160b may be provided with a through hole 161a or a groove coupled to the first lower protrusion 114 of the bobbin 110. The second outer frame 162 may be provided with a through hole 162a or a groove coupled to the second lower protrusion 147 of the housing 140.

Between the first upper protrusion 113 of the bobbin 110 and the through hole of the first inner frame 151, the first lower protrusion 117 of the bobbin 110 and the second inner frame ( 161), between the second upper protrusion 144 of the housing 140 and the through hole of the first outer frame 152, and between the second lower protrusion 147 of the housing 140 and the second lower protrusion 147 of the housing 140. 2 The through holes 162a of the outer frame 162 may be bonded to each other.

Each of the first and second frame connectors 153 and 163 may be bent or bent (or curved) at least once to form a pattern of a certain shape. The bobbin 110 may be elastically (or elastically) supported in an upward and/or downward motion in the first direction through a change in position and slight deformation of the first and second frame connectors 153 and 163.

The coil 120 may be coupled to the second inner frames 161 of the first and second lower springs 160a and 160b, and may be electrically connected to the first and second lower springs 160a and 160b. You can.

For example, one end of the first coil unit 120-1 may be coupled to one of the second inner frames 161 of the first and second lower springs 160a and 160b, and the second coil unit ( One end of 120-2) may be coupled to the other one of the second inner frames 161 of the first and second lower springs 160a and 160b.

Referring to FIG. 10, a first bonding portion 19a for coupling one end of the first coil portion 120-1 is provided on the upper surface of one end of the second inner frame 161 of the first lower spring 160a. It can be, and a second bonding part 19b for coupling one end of the second coil part 120-2 may be provided on the upper surface of one end of the second inner frame 161 of the second lower spring 160b. there is.

The coil 120 may be bonded to the first and second bonding parts 19a and 19b using a conductive adhesive member such as solder. With respect to the first and second bonding parts 19a and 19b, the term “bonding part” may be replaced with a pad part, a connection terminal, a solder part, or an electrode part.

In order to prevent oscillation when the bobbin 110 moves, a damper may be disposed between the first frame connection portion 153 of the upper elastic member 150 and the upper surface of the bobbin 110. Alternatively, a damper (not shown) may be disposed between the second frame connection portion 163 of the lower elastic member 160 and the lower surface of the bobbin 110.

Or a damper is provided between each of the bobbin 110 and/or housing 140 and the upper elastic member 150, or between each of the bobbin 110 and/or housing 140 and the lower elastic member 160. It can be applied. For example, the damper may be a gel-type silicone, but is not limited thereto.

Additionally, in order to avoid spatial interference with the guide member 216 of the base 210, escape grooves 7a and 7b may be provided at the corners of the second outer frame of each of the lower springs 160a and 160b.

Each of the first and second lower springs 160a and 160b may be disposed on the upper surface of the base 210.

Each of the first and second lower springs 160a and 160b may include first and second connection terminals 164a and 164b for electrical connection to the outside. With respect to the first and second connection terminals 164a and 164b, the term “connection terminal” may be replaced with the term pad part, bonding part, solder part, or electrode part.

For example, each of the first and second connection terminals 164a and 164b is connected to the outer surface of the second outer frame 163 of a corresponding one of the first and second lower springs 160a and 160a, It may be bent and extended in a direction toward the base 210.

The first and second connection terminals 164a and 164b of the first and second lower springs 160a and 160b may be arranged to be spaced apart from each other on the first outer surface 210a of the base 210, and the base It may be in contact with the first outer surface (210a) of (210).

For example, the first and second connection terminals 164a and 164b may be disposed on one of the outer surfaces 210a of the base 210. This is to facilitate soldering for electrical connection to the outside. However, the embodiment is not limited to this, and in another embodiment, the first and second connection terminals of the first and second lower springs may be disposed on two different outer surfaces of the base 210.

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

The base 210 may include a guide member 216 that protrudes upward at a predetermined height from each of the four corner portions.

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

The guide member 216 may be inserted into the guide groove 148 of the housing 140, and may be fastened or combined with the guide groove 148 by an adhesive member (not shown) such as epoxy or silicon.

The first outer surface 210a of the base 210 has first and second depressions corresponding to the first and second connection terminals 164a and 164b of the first and second lower springs 160a and 160b. (205a, 205b) may be provided.

For example, the first and second recesses 205a and 205b may be arranged to be spaced apart from each other on an outer surface of one of the sides of the base 210.

For example, each of the first and second depressions 205a and 205b 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.

For example, the inner surface of each of the first and second connection terminals 164a and 164b may contact one surface (eg, bottom surface) of the first and second recessed portions 205a and 205b.

The outer surface of each of the first and second connection terminals 164a and 164b disposed in the first and second recesses 205a and 205b may be exposed from the outer surface of the base 210.

Additionally, the lower ends of each of the first and second connection terminals 164a and 164b may be exposed from the lower surface of the base 210, but this is not limited to this. In another embodiment, each of the first and second connection terminals 164a and 164b may be exposed. The lower end may not be exposed from the lower surface of the base 210.

The first and second connection terminals 164a and 164b may be electrically connected to external wires or external elements by a conductive member, such as soldering, in order to supply power or signals from the outside.

In addition, a step 211 may be provided at the bottom of the outer surface of the base 210, and the step 211 may contact the lower ends of the side plates of the cover member 300 and guide the cover member 300. can do. At this time, the step 211 of the base 210 and the lower ends of the side plates of the cover member 300 may be adhesively fixed and sealed with an adhesive or the like.

The first and second connection terminals 164a and 164b of the first and second lower springs 160a shown in FIGS. 10 and 11 are respectively connected to the second inner frame 161 and the second outer frame 162. , and the second frame connection portion 163, but is not limited thereto.

In another embodiment, each of the first and second lower springs may include only the second inner frame 161, the second outer frame 162, and the second frame connection portion 163, and the first and second connection portions may include only the second inner frame 161, the second outer frame 162, and the second frame connection portion 163. Each of the terminals may be separately disposed on the outer surface of the base 210.

In this case, one end of each of the first and second connection terminals disposed on the outer surface of the base 210 is connected to the second outer frame corresponding to one of the first and second lower springs by a conductive adhesive member such as soldering. It may be coupled or bonded to.

An embodiment may be a lens driving device for AF mounted on a dual camera module. A dual camera module refers to two lens driving devices included in one camera module. For example, a dual camera module includes a lens driving device that can perform only the autofocus function (hereinafter referred to as the “lens driving device for AF”) and a lens driving device that performs the autofocus function and OIS (Optical Image Stabilizer) function (hereinafter referred to as “the lens driving device for AF”). It may include a “lens driving device for OIS”).

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

Referring to FIG. 13, the camera module 200 includes a lens or lens barrel 400, a lens driving device 100, an adhesive member 612, a filter 610, a first holder 600, and a second holder 800. ), an image sensor 810, a motion sensor 820, a control unit 830, and a connector 840.

A lens or lens barrel (lens barrel, 400) may be mounted on the bobbin 110 of the lens driving device 100.

The first holder 600 may be placed below the base 210 of the lens driving device 100. The filter 610 is mounted on the first holder 600, and the first holder 600 may be provided with a protrusion 500 on which the filter 610 is seated.

The adhesive member 612 may couple or attach the base 210 of the lens driving device 100 to the first holder 600. For example, the adhesive member 612 may be epoxy, thermosetting adhesive, ultraviolet curing adhesive, etc.

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

A hollow may be formed in a portion of the first holder 600 where the filter 610 is mounted so that light passing through the filter 610 can enter the image sensor 810.

The second holder 800 is disposed below the first holder 600, and an image sensor 810 may be mounted on the second holder 600. The image sensor 810 is a site where light passing through the filter 610 is incident and an image included in the light is formed.

The second holder 800 may be equipped with various circuits, elements, and control units to convert the image formed on the image sensor 810 into an electrical signal and transmit it to an external device. The second holder 800 can be implemented as a circuit board on which an image sensor can be mounted, a circuit pattern can be formed, and various elements can be combined.

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 filter 610 and the image sensor 810 may be arranged to be spaced apart from each other in the optical axis direction.

The motion sensor 820 is mounted on the second holder 800 and can be electrically connected to the control unit 830 through a circuit pattern provided on the second holder 800.

The motion sensor 820 outputs rotational angular velocity information resulting from the movement of the camera module 200. The motion sensor 820 may be implemented as a 2-axis or 3-axis gyro sensor, or an angular velocity sensor.

The control unit 830 is mounted on the second holder 800. The second holder 800 may be electrically connected to the lens driving device 100. For example, the second holder 800 may be electrically connected to the coil 120 of the lens driving device 100.

For example, a driving signal may be provided to the coil 120 through the second holder 800.

The connector 840 is electrically connected to the second holder 800 and may have a port for electrical connection to an external device.

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

14 and 15, the 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 input/output unit 720. It may include an output unit 750, a memory unit 760, an interface unit 770, a control unit 780, and a power supply unit 790.

The body 850 shown in FIG. 14 has a bar shape, but is not limited to this, and can be a slide type, folder type, or swing type in which two or more sub-bodies are coupled to enable relative movement. It may have various structures such as , swirl type, etc.

The body 850 may include a case (casing, housing, cover, etc.) that forms the 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 built into the space formed between the front case 851 and the rear case 852.

The wireless communication unit 710 may be configured to include one or more modules that enable wireless communication between the terminal 200A and a wireless communication system or between the terminal 200A and the network where 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. there is.

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

The camera 721 may include the camera module 200 according to the embodiment shown in FIG. 13.

The sensing unit 740 monitors the current state of the terminal 200A, such as the open/closed state of the terminal 200A, the location of the terminal 200A, presence or absence of user contact, the direction of the terminal 200A, acceleration/deceleration of the terminal 200A, etc. It is possible to detect and generate a sensing signal to control the operation of the terminal 200A. For example, if the terminal 200A is in the form of a slide phone, it can sense whether the slide phone is opened or closed. In addition, it is responsible for sensing functions related to whether the power supply unit 790 supplies power and whether the interface unit 770 is connected to an external device.

The input/output unit 750 is for generating input or output related to vision, hearing, or tactile sensation. The input/output unit 750 can generate input data for controlling the operation of the terminal 200A and can also display information processed by the terminal 200A.

The input/output unit 750 may include a key pad unit 730, a display module 751, a sound output module 752, and a touch screen panel 753. The key pad unit 730 can generate input data through key pad input.

The display module 751 may include a plurality of pixels whose colors change according to electrical signals. For example, the display module 751 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, or a three-dimensional display. It may include at least one display (3D display).

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

The touch screen panel 753 can convert the change in capacitance that occurs due to the user's touch to a specific area of the touch screen into an electrical input signal.

The memory unit 760 may store programs for processing and controlling the control unit 780 and stores input/output data (e.g., phone book, messages, audio, still images, photos, videos, etc.). It can be stored temporarily. For example, the memory unit 760 may store images captured by the camera 721, such as photos or videos.

The interface unit 770 serves as a passage connecting external devices connected to the terminal 200A. The interface unit 770 receives data from an external device, receives power and transmits it 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 audio I/O (Input/ Output) port, video I/O (Input/Output) port, and earphone port.

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

The control unit 780 may be equipped with a multimedia module 781 for multimedia playback. The multimedia module 781 may be implemented within the control unit 780 or may be implemented separately from the control unit 780.

The control unit 780 can perform pattern recognition processing to recognize handwriting or drawing input on the touch screen as text and images, respectively.

The power supply unit 790 can receive external power or internal power under the control of the control unit 780 and supply power necessary for the operation of each component.

The 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 and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

Claims (20)

A first side, a second side facing the first side in a second direction perpendicular to the first direction parallel to the optical axis, a third side disposed between the first side and the second side, and the first side and a fourth side facing the third side in a third direction perpendicular to the second directions;
a bobbin disposed within the housing;
a coil disposed on the bobbin and including a first coil portion and a second coil portion disposed below the first coil portion;
a magnet including a first magnet unit and a second magnet unit disposed on the first side of the housing, and a third magnet unit and a fourth magnet unit disposed on the second side of the housing; and
A first yoke disposed on the first side of the housing and a second yoke disposed on the second side of the housing,
A lens driving device in which the magnet is not disposed on the third side and the fourth side of the housing. According to paragraph 1,
A lens driving device wherein the yoke is not disposed on the third side and the fourth side of the housing. According to paragraph 1,
The second magnet unit is disposed below the first magnet unit,
The fourth magnet unit is disposed below the third magnet unit,
The first yoke is disposed between the first magnet unit and the second magnet unit, and the second yoke is disposed between the third magnet unit and the fourth magnet unit. According to paragraph 1,
Each of the first coil unit and the second coil unit is a coil ring surrounding the outer peripheral surface of the bobbin. According to paragraph 1,
A lens driving device in which the first coil unit and the second coil unit are connected to each other. According to clause 5,
A driving current is provided to the coil,
A lens driving device in which the direction of current flowing in the first coil unit and the direction of current flowing in the second coil unit are opposite to each other. According to paragraph 3,
The first yoke is in contact with the first magnet unit and the second magnet unit, and the second yoke is in contact with the third magnet unit and the fourth magnet unit. According to paragraph 3,
A lens driving device wherein a length of the first yoke in the third direction is greater than a length of each of the first and second magnet units in the third direction. According to paragraph 3,
The lens driving device wherein the length of the first yoke in the first direction is less than or equal to the length of each of the first and second magnet units in the first direction. According to paragraph 1,
A lens driving device wherein each of the first to fourth magnet units is a unipolar magnetized magnet. According to paragraph 1,
an upper elastic member coupled to the upper part of the bobbin and the upper part of the housing; and
A lens driving device including a lower elastic member coupled to a lower portion of the bobbin and a lower portion of the housing. According to paragraph 1,
The housing includes a first through hole disposed on the first side and a second through hole disposed on the second side,
The first and second magnet units and the first yoke are disposed in the first through hole, and the third and fourth magnet units and the second yoke are disposed in the second through hole. . According to clause 11,
The lower elastic member includes a first lower spring and a second lower spring,
The coil is electrically connected to the first and second lower springs. According to clause 13,
It includes a base disposed below the lower elastic member,
Each of the first and second lower springs,
an inner frame coupled to the lower part of the bobbin;
an outer frame coupled to the lower portion of the housing;
a frame connector connecting the inner frame and the outer frame; and
A lens driving device including a connection terminal connected to the outer frame and disposed on an outer surface of the base. According to paragraph 3,
At the initial position of the bobbin, a boundary area of the first coil unit and the second coil unit is perpendicular to the optical axis and overlaps the first yoke in a straight line passing through the optical axis. According to paragraph 3,
In the initial position of the bobbin, the boundary area of the first coil unit and the second coil unit is lower than the lower surface of the first and third magnet units and higher than the upper surface of the second and fourth magnet units. drive. According to clause 12,
The housing is,
a first stopper supporting one end of the first yoke and a second stopper supporting the other end of the first yoke; and
It includes a third stopper supporting one end of the second yoke and a fourth stopper supporting the other end of the second yoke,
The first and second stoppers are located between the first magnet unit and the second magnet unit, and the third and fourth stoppers are located between the third magnet unit and the fourth magnet unit. A first side, a second side facing the first side in a second direction perpendicular to the first direction parallel to the optical axis, a third side disposed between the first side and the second side, and the first side and a fourth side facing the third side in a third direction perpendicular to the second directions;
a bobbin disposed within the housing;
a coil disposed on the bobbin and including a first coil portion and a second coil portion disposed below the first coil portion;
a magnet including a first magnet unit and a second magnet unit disposed on the first side of the housing, and a third magnet unit and a fourth magnet unit disposed on the second side of the housing; and
A first yoke disposed between the first magnet unit and the second magnet unit and a second yoke disposed between the third magnet unit and the fourth magnet unit,
A lens driving device wherein a length of the first yoke in the third direction is greater than a length of each of the first and second magnet units in the third direction. According to clause 18,
A lens driving device wherein a length of the second yoke in the third direction is greater than a length of each of the third and fourth magnet units in the third direction. lens;
A lens driving device according to any one of claims 1 to 19; and
A camera module containing an image sensor.

Images