KR102498277B1 - A lens moving unit, and camera module and optical instrument including the same - Google Patents

Abstract

The embodiment includes a body and a base including a first pillar part, a second pillar part, a third pillar part, and a fourth pillar part disposed at corners of the body, a bobbin disposed on the body, and a first pillar part provided The first roller part disposed in the first groove, the second roller part disposed in the second groove provided in the second pillar part adjacent to the first pillar part, the magnet disposed in the bobbin, and the first pillar part corresponding to the magnet. and a coil disposed between the second pillar portion, the first roller portion is in contact with at least two or more areas of the first groove, and the second roller portion is in contact with at least two or more areas of the second groove, The first groove includes a first opening exposing a portion of the first roller portion, the second groove includes a second opening exposing a portion of the second roller portion, and the bobbin is disposed in the first opening to expose the first roller portion. It includes a first support part in contact with and a second support part disposed in the second opening and in contact with the second roller part.

Description

Lens driving device, and camera module and optical device including the same

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

Since it is difficult to apply the technology of a voice coil motor (VCM) used in a conventional camera module to a camera module for ultra-small size and low power consumption, related research has been actively conducted.

BACKGROUND OF THE INVENTION Demand and production of electronic products such as smartphones and camera-equipped mobile phones are increasing. Cameras for mobile phones tend to be high-resolution and miniaturized, and accordingly, actuators are becoming miniaturized, large-diameter, and multi-functional. In order to implement a camera for a high-pixel mobile phone, additional functions such as performance improvement, auto focusing, shutter shake improvement, and zoom function of the mobile phone camera are required.

Embodiments provide a lens driving device capable of improving AF driving speed and suppressing movement of a bobbin during AF driving, and a camera module and optical device including the same.

A lens driving device according to an embodiment includes a base including a body and a first pillar part, a second pillar part, a third pillar part, and a fourth pillar part disposed at corners of the body; a bobbin disposed on the body; a first roller part disposed in a first groove provided in the first pillar part; a second roller part disposed in a second groove provided in the second pillar part adjacent to the first pillar part; a magnet disposed on the bobbin; and a coil disposed between the first pillar part and the second pillar part in correspondence with the magnet, wherein the first roller part contacts at least two or more regions of the first groove, and the second roller part The portion contacts at least two regions of the second groove, the first groove includes a first opening exposing a portion of the first roller portion, and the second groove exposes a portion of the second roller portion. The bobbin includes a first support part disposed in the first opening and in contact with the first roller part, and a second support part disposed in the second opening and in contact with the second roller part. can include

The first support part may protrude from an outer surface of the bobbin, and the second support part may protrude from an outer surface of the bobbin.

The first roller part may contact four areas of the first groove, and the second roller part may contact four areas of the second groove.

The lens driving device may further include a circuit board fixed to the base and coupled to the coil, and the circuit board may be fixed to the first pillar part and the second pillar part.

The circuit board may include a terminal electrically connected to the coil, the terminal may include a first terminal and a second terminal, and the terminal may be disposed on the body of the base.

The lens driving device may further include a magnetic body disposed on the base under the coil and having an attractive force with the magnet.

The magnetic material may be disposed on an outer surface of the base.

The magnetic body includes a plate disposed on an outer surface of the body of the base; a first extension portion disposed on an outer surface of the first pillar portion and extending upward from the plate; and a second extension portion disposed on an outer surface of the second pillar portion and extending upward from the plate.

Each of the first roller unit and the second roller unit may include a plurality of rollers, and each of the rollers may have a cylindrical shape.

Each of the first roller unit and the second roller unit may be rotatably disposed about an axis perpendicular to an optical axis.

A ratio of the lengths of the rollers in the circumferential direction to the lengths of the rollers in the height direction may range from 1:1.5 to 1:5.

The bobbin may include first to fourth protrusions disposed on a side surface, the magnet is disposed in a seating groove provided in the first protrusion, and the first protrusion includes the first pillar part and the second pillar part. The second protrusion is disposed between the second pillar portion and the third pillar portion, the third protrusion is disposed between the third pillar portion and the fourth pillar portion, and the fourth The protrusion may be disposed between the fourth pillar part and the first pillar part.

The first roller part is disposed to be inclined at a first angle with respect to the first reference line, the second roller part is disposed to be inclined at a second angle with respect to the first reference line, and the first reference line is disposed at the first pillar part. An imaginary straight line parallel to a direction toward the second pillar portion, and the first angle may be different from the second angle.

The angle between the central axis of the roller and the first reference line is 30 degrees to 60 degrees, the central axis is an axis passing through the center of the diameter of the roller and parallel to the longitudinal direction of the roller, and the roller axis is the central axis can be rotated with

The lubricant may further include a lubricant disposed in the first groove and the second groove, and the lubricant may contact the first groove and the first roller part, and contact the second groove and the second roller part. .

A lens driving device according to another embodiment includes a base including a body, first pillars disposed at corners of the body, and second pillars adjacent to the first pillars; a bobbin disposed on the body; a first roller part disposed in a first groove provided in the first pillar part; a second roller part disposed in a second groove provided in the second pillar part; a magnet disposed on the bobbin; a substrate fixed to the base; a coil coupled to the substrate and facing the magnet; and a magnetic body disposed on the base under the coil and having an attractive force with the magnet, wherein the first roller part contacts the first pillar part and the bobbin, and the second roller part contacts the second pillar part. and may contact the bobbin.

According to the embodiment, the AF driving speed may be improved, and flow of the bobbin may be suppressed during AF driving.

1 shows an exploded perspective view of a lens driving device according to an embodiment.
Figure 2 is a perspective view of the bobbin and magnet shown in Figure 1;
Figure 3a is a first perspective view of the base shown in Figure 1;
Figure 3b is a second perspective view of the base shown in Figure 1;
FIG. 4 is an exploded perspective view of first and second base roller units, a magnetic body, a coil, and a circuit board shown in FIG. 1 .
5 is an enlarged view of a first groove provided in a first pillar part.
Figure 6 is an enlarged view of the roller shown in Figure 4;
7 is a plan view of the lens driving device excluding the cover member.
FIG. 8 is a cross-sectional view of the lens driving device shown in FIG. 7 in an AB direction.
FIG. 9 is a cross-sectional view of the lens driving device shown in FIG. 7 in the CD direction.
10 is a partial enlarged view of FIG. 7 .
FIG. 11 shows a part of the cross-sectional view in the CD direction of FIG. 7 .
12 shows a position sensor additionally provided in the lens driving device.
FIG. 13 shows a cross-sectional view of an embodiment including the position sensor of FIG. 12 .
14A is a partial perspective view of a base according to another embodiment.
14B is a partial perspective view of a base according to another embodiment.
14C is a partial perspective view of a base according to another embodiment.
15 is a perspective view of a bobbin according to another embodiment.
16 is a perspective view of a base according to another embodiment.
17 is a perspective view of the combination of the bobbin of FIG. 15 and the base of FIG. 16;
FIG. 18 is a perspective view of the bobbin of FIG. 15 , the base of FIG. 16 , first and second roller units, a first coil, and a circuit board.
19 is an exploded perspective view of a camera module according to an embodiment.
20 is a perspective view of a portable terminal according to an embodiment.
FIG. 21 shows a configuration diagram of the portable terminal shown in FIG. 20 .

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

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

In addition, relational terms such as “first” and “second”, “upper/upper/upper” and “lower/lower/lower” used below refer to any physical or logical relationship or sequence between such entities or elements. may be used only to distinguish one entity or element from another entity or element, without necessarily requiring or implying that Also, like reference numbers indicate like elements throughout the description of the drawings.

In addition, terms such as "comprise", "comprise", or "have" described above mean that the corresponding component may be inherent unless otherwise stated, excluding other components. It should be construed as being able to further include other components.

Hereinafter, with reference to the accompanying drawings, a lens driving device according to an embodiment will be described as follows. For convenience of description, the lens driving device according to the embodiment is described using a Cartesian coordinate system (x, y, z), but it may be described using another coordinate system, and the embodiment is not limited thereto. In each drawing, the x-axis and the y-axis mean directions perpendicular to the z-axis, which is the optical axis direction, and the z-axis direction, which is the optical axis (OA) direction or a direction parallel to the optical axis (OA), is referred to as a 'first direction', and x The axial direction may be referred to as a 'second direction' and the y-axis direction may be referred to as a 'third direction'.

An 'auto focusing device' applied to a small camera module of a mobile device such as a smart phone or a tablet PC is a device that automatically focuses an image of a subject on an image sensor surface. Such an auto focusing device may be configured in various ways. A lens driving device according to an embodiment may perform an auto focusing operation by moving an optical module composed of at least one lens in a first direction.

1 shows an exploded perspective view of a lens driving device 100 according to an embodiment.

Referring to FIG. 1 , the lens driving device 100 includes a cover member 300, a bobbin 110, a coil 120, a magnet 130, a first roller unit 150, and a second It includes a roller unit 160, a circuit board 190, a magnetic body 195 and a base 210.

First, the cover member 300 will be described.

The cover member 300 accommodates other components 110 , 120 , 130 , 150 , 160 , 190 , and 195 in an accommodation 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 lower ends of the side plates of the cover member 300 may be coupled to the base 210 . The top plate of the cover member 300 may have a polygonal shape, for example, a quadrangle or an octagon.

The cover member 300 may have an opening on the upper plate for exposing the lens unit 400 coupled to the bobbin 110 to external light.

For example, the cover member 300 may be made of a non-magnetic metal material such as SUS aluminum (Al), copper (Cu), tin (Sn), or platinum, or plastic. By using the cover member 300 made of a non-magnetic material, the embodiment can prevent the cover member 330 from sticking to the magnet 130 or/and the magnetic material 195 .

An adhesive member injection groove 332 for injecting an adhesive member for bonding with the base 210 may be provided at a lower end of at least one of the side plates of the cover member 300 .

In addition, a groove 1334 for exposing the terminals 1091 and 1092 of the circuit board 1190 may be provided at a lower end of the side plate of the cover member 300 .

Next, the bobbin 110 will be described.

FIG. 2 is a perspective view of the bobbin 110 and the magnet 130 shown in FIG. 1 .

Referring to FIG. 2 , the bobbin 110 is located inside the pillar parts 216a to 216d of the base 210, and the coil 120 and the magnet 130 generate electromagnetic interaction in a first direction (eg, Z axial direction). For example, the bobbin 110 may be moved in a unidirectional direction, for example, in an upward direction, from the initial position of the bobbin 110 .

The bobbin 110 may have an opening 101 for mounting a lens or lens barrel.

The shape of the opening 101 of the bobbin 110 may match the shape of the lens or lens barrel to be mounted, and may be, for example, circular, elliptical, or polygonal, but is not limited thereto.

The bobbin 110 may include at least one stopper 111 disposed on an upper surface.

The stopper 111 of the bobbin 110 may have a structure protruding in a first direction or upward from the upper surface of the bobbin 110, and the upper surface of the bobbin 110 directly collides with the inner surface of the upper plate of the cover member 300 can prevent it from happening.

The bobbin 110 may have a seating groove 102 for seating the magnet 130 on its outer surface. For example, the seating groove 102 may have a structure that is recessed from the outer surface of the bobbin 110 and may have a lower portion that is open.

The bobbin 110 includes side surfaces 110c-1 to 110c-4, a side surface 110b-1 between the side surface 110c-1 and the side surface 110c-2, and a side surface 110c-2 and the side surface 110c-2. 3) side 110b-2 between, side 110b-3 between side 110c-3 and side 110c-4, and side between side 110c-4 and side 110c-1 (110b-4).

The side surfaces 110c-1 to 110c-4 of the bobbin 110 may correspond to the pillar portions 216a to 216d of the base 210, and the side surfaces 110b-1 to 110b- 4) may correspond to spaces between the pillar parts 216a to 216d of the base 210.

The bobbin 110 may include protrusions 118a to 118d protruding from the outer surface 110b. For example, outer surfaces of the protrusions 118a to 119d may be side surfaces 110b-1 to 110b-4 of the bobbin 110.

The seating groove 102 may be provided on a side surface of the first protrusion 118a of the bobbin 110 and may have the same shape as or the same shape as the magnet 130 .

The bobbin 110 may include a first support part 116a provided on the side surface 110c-1 and a second support part 116b provided on the side surface 110c-2.

For example, the first support portion 116a may be disposed between the first protrusion 118a and the fourth protrusion 118d, and the second support portion 116b may be disposed between the first protrusion 118a and the second protrusion 118b. can be placed in

The first support part 116a may protrude from the outer surface of the bobbin 110, and the second support part 116b may protrude from the outer surface of the bobbin 110.

For example, the first support portion 116a may have a columnar shape protruding from the side surface 110c-1 of the bobbin 110, for example, a semicircular columnar shape, but is not limited thereto, and may have various columnar shapes. .

For example, the second support portion 116b may have a columnar shape protruding from the side surface 110c-2 of the bobbin 110, for example, a semicircular columnar shape, but is not limited thereto, and may have various columnar shapes. .

For example, the first support portion 116a and the second support portion 116b may have left-right symmetrical shapes with respect to the first protrusion 118a, but are not limited thereto.

For example, in the direction from the side surface 110b-2 to the side surface 110b-4 of the bobbin 110, the fourth protrusion 118d may protrude more than the first support portion 116a, and the side surface 110b of the bobbin 110 In the direction from -3) to the side surface 110b-1, the first protruding portion 118a may protrude more than the first support portion 116a.

Also, for example, the second protruding portion 118b may protrude more than the second support portion 116b in the direction from the side surface 110b-4 to the side surface 110b-2 of the bobbin 110, and the side surface of the bobbin 110 ( In the direction from 110b-3 to the side surface 110b-1, the first protruding portion 118a may protrude more than the first support portion 116a. This is to improve the freedom of design of the arrangement of the first and second roller parts 150 and 160 on the pillar parts 216a and 216b.

Next, the magnet 130 will be described.

The magnet 130 is disposed or mounted on the bobbin 110. For example, the magnet 130 may be disposed in the seating groove 102 provided on the outer surface of the side surface 110b1 of the bobbin 110, for example, the first protrusion 118a.

The shape of the magnet 130 may have a shape corresponding to the side surface 110b-1 of the bobbin 110, for example, a rectangular parallelepiped shape, but is not limited thereto.

The magnet 130 may be a positively magnetized magnet in order to improve the driving force by the electromagnetic interaction of the coil 120, but is not limited thereto.

For example, the magnet 130 may be an anode magnetized magnet divided into two in a direction perpendicular to the direction of the optical axis OA. In this case, the magnet 130 may be implemented with ferrite, alnico, or rare earth magnet.

For example, the magnet 130 may include a first magnet part 31 including an N pole and an S pole, a second magnet part 32 including an S pole and an N pole, and a non-magnetic partition wall 33. there is.

The first magnet part 31 and the second magnet part 32 may be spaced apart from each other, and the non-magnetic barrier rib 33 may be positioned between the first magnet part 31 and the second magnet part 32. .

The non-magnetic barrier rib is a portion that is substantially non-magnetic and may include a section having little polarity, filled with air or made of a non-magnetic material, and may be referred to as a “neutral zone”.

In another embodiment, the magnet 130 may be implemented as a unipolar magnetized magnet including an S pole and an N pole.

Next, the base 210 will be described.

Figure 3a is a first perspective view of the base 210 shown in Figure 1, Figure 3b is a second perspective view of the base 210 shown in Figure 1, Figure 4 is the base 210 shown in Figure 1, the first It is an exploded perspective view of the first and second roller units 150 and 160, the magnetic body 195, the coil 120, and the circuit board 190.

Referring to FIGS. 3A, 3B, and 4 , the base 210 is coupled to the cover member 300 and may form an accommodation space for the bobbin 110 together with the cover member 300 .

The base 210 may have an opening 301 corresponding to the opening of the cover member 300 and/or the opening of the bobbin 110 . The base 210 may have a shape matching or corresponding to the cover member 300, for example, a rectangular shape.

The base 210 may include a body 213 having an opening 301 and pillar parts 216a to 216d protruding from the body 213 .

The body 213 of the base 210 may include corner portions 217a to 217d and side portions 218a to 218d positioned between the corner portions 217a to 217d.

Each of the pillar parts 216a to 216d may be disposed at a corresponding one of the corner parts 217a to 217d of the body 213 .

For example, the base 210 includes a first pillar part 216a protruding upward at a predetermined height from the first corner part 217a, a second pillar part 216b protruding at a predetermined height from the second corner part 217b, A third pillar part 216c protrudes from the third corner part 217c to a predetermined height, and a fourth pillar part 216d protrudes from the fourth corner part 217d to a predetermined height.

The “pillars” of the base 210 may be expressed in terms of “protrusions”.

For example, each of the pillar parts 216a to 216d may have a polygonal pillar shape, a circular or elliptical pillar shape protruding in a vertical direction with respect to the upper surface of the body 213 of the base 210, but is not limited thereto. For example, the cross-sectional shape of each of the pillar parts 216a to 216d may be an 'L' shape or a polygonal shape such as a triangle, but is not limited thereto.

For example, the length of each of the side parts 218a to 218d of the body 213 of the base 210 in the transverse direction is greater than the length of each of the corner parts 217a to 217d of the body 213 of the base 210 in the transverse direction. It may be long, but is not limited thereto.

An opening may be provided between two adjacent pillar parts 216a and 216b, 216b and 216c, 216c and 216d, and 216d and 216a of the base 210 .

The heights of each of the pillar parts 216a to 216d based on the upper surface of the body 213 of the base 210 may be the same, but is not limited thereto.

The base 210 may include a stopper 23 protruding from the upper surface of the body 213 . For example, at least one, for example, two stoppers 23 may be disposed on the upper surface of each of the second side portion 218b and the fourth side portion 218d of the body 213, but the location and number thereof are not limited thereto. The stopper 23 of the base 210 may be expressed as a "lower stopper" instead.

The stopper 23 may prevent the bottom or bottom of the bobbin 110 from directly colliding with the body 213 of the base 210 .

The base 210 may include a stopper 31 disposed on or on top of the pillar parts 216a to 216d. The stopper 31 of the base 210 may be expressed as an "upper stopper".

For example, the stopper 31 of the base 210 may have a structure protruding in the optical axis direction based on the upper surfaces of the pillar parts 216a to 216d.

The stopper 31 of the base 210 may serve to secure a space or gap in which the bobbin 110 can move during AF operation.

A step 211 may be provided at the lower end of the outer surface of the body 213 of the base 210, and the step 211 may contact lower ends of the side plates of the cover member 300, and the cover member 300 can guide you. 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 base 210 has a first groove 51a provided in the first pillar part 216a to dispose the first roller part 150, and a first pillar part to dispose the second roller part 160 ( A second groove 51b provided in the second pillar portion 216b adjacent to 216a may be provided.

For example, the first groove 51a may have a shape that corresponds to or coincides with at least one roller included in the first roller unit 150, and the second groove 51b is included in the second roller unit 160. It may be shaped to correspond or coincide with at least one roller.

Each of the first groove 51a and the second groove 51b may have a structure that is recessed from the upper surface of the base 210 .

The first groove 51a may include a first opening 61a opened to an inner surface of the first pillar portion 216a, and the second groove 51b may extend to an inner surface of the second pillar portion 216b. It may include a second opening 61b that is opened.

The first support part 116a of the bobbin 110 may be disposed in the first opening 61a and may come into contact with a part of the first roller part 150 . Also, the second support part 116b of the bobbin 110 may be disposed in the second opening 61b and may come into contact with a part of the second roller part 160 .

The frictional force between the first and second roller units 150 and 160 and the first and second grooves 51a and 51b of the base 210 is reduced by the first opening 61a and the second opening 61b. A desired frictional force between the first and second roller units 150 and 160 and the base 210 may be obtained by adjusting the size of the first and second openings 61a and 61b.

The base 210 is formed in the first guide groove 52a formed on the inner surface of the first groove 51a of the first pillar portion 216a and the second groove 51b of the second pillar portion 216b. A second guide groove 52b formed on the side surface may be further included.

A first protrusion 311 of the cover member 300, which will be described later, may be inserted or disposed in the first guide groove 52a, and a second protrusion 312 of the cover member 300 may be inserted into the second guide groove 52b. may be inserted or placed.

In addition, lubricant may be injected into the first groove 51a through the first guide groove 52a, and lubricant may be injected into the second groove 51b through the second guide groove 52b.

The lubricant may be disposed in the first groove 51a and the second groove 51b, may contact the first groove 51a and the first roller unit 150, and may contact the second groove 51b and the second groove 51b. It may contact the roller unit 160 .

For example, the lubricant may be a grease type such as SDM (steel dust meter)-378 grease, but is not limited thereto.

The lubricant may reduce frictional force between the first and second roller units 1150 and 1160 and the first and second grooves 51a and 51b, and smoothly rotate the first and second roller units 150 and 160. can do

The base 210 may include first and second pillar parts 216a and 216b and a first mounting groove 41 and a second mounting groove 42 provided in the body 213 .

Based on the outer surfaces of the first and second pillar parts 216a and 216b of the base 210, the first mounting groove 41 and the second mounting groove 42 may have a stair structure or a two-stage structure.

The first mounting groove 41 may be provided on the outer surface of the first and second pillar parts 216a and 216b and the outer surface of the first side part 218a of the body 213, and the circuit board 190 and They may have the same or matching shape.

The second mounting groove 42 may be located within the first mounting groove 41, and the outer surface of the first and second pillar parts 216a and 216b and the outer surface of the first side part 218a of the body 213 It may be provided on the side, and may have the same or identical shape as the magnetic body 195 .

Next, the circuit board 190 will be described.

The circuit board 190 is placed or fixed to the base 210 .

It may be fixed to the first and second pillar parts 216a and 216b of the base 210 of the circuit board 190 . For example, the circuit board 190 is disposed on the first and second pillar parts 216a and 216b of the base 210 and the first side part 218a of the body 213 .

For example, the circuit board 190 may be disposed within the first mounting groove 41 .

The circuit board 190 may include a terminal electrically connected to the coil, for example, a first terminal 91 and a second terminal 92, and the terminal of the circuit board 190 is the body of the base 210 ( 213) or may be located.

For example, the circuit board 190 may be a printed circuit board or a flexible circuit board.

Next, the coil 120 will be described.

The coil 120 is arranged, mounted, or fixed to the circuit board 190 so as to correspond to or face the magnet 130 . For example, the coil 120 may be disposed on the first surface of the circuit board 190, and the terminals 91 and 92 may be disposed on the second surface of the circuit board 190.

For example, the coil 120 may be fixed or attached to the circuit board 190 by an adhesive member, but is not limited thereto.

The coil 120 may be positioned between the first pillar part 216a and the second pillar part 216b of the base 210 .

For example, the coil 120 may be a ring-shaped coil ring. For example, the coil 120 may have a ring shape in which a length in a horizontal direction is longer than a length in a vertical direction.

A driving signal may be applied to the coil 120 to generate electromagnetic force by electromagnetic interaction with the magnet 130 . At this time, the driving signal provided to the coil 120 may be direct current, and may be in the form of voltage or current. Alternatively, for example, the driving signal provided to the coil 120 may include at least one of a DC signal and an AC signal.

The coil 120 to which the driving signal is provided may have electromagnetic interaction with the magnet 130 disposed on the bobbin 110, and AF by the electromagnetic force due to the electromagnetic interaction between the coil 120 and the magnet 130. The movable part may move in the first direction. By adjusting the magnitude of the driving signal, it is possible to control the movement of the AF movable unit in the first direction, thereby performing an auto focusing function.

The AF movable unit may include a bobbin 110 and components mounted on the bobbin 110 and moving together with the bobbin 110 . For example, the AF movable unit may include the bobbin 110 and the magnet 130 .

The coil 120 may be electrically connected to the first terminal 91 and the second terminal 92 of the circuit board 190 . For example, both ends of the coil 120 may be electrically connected to pads (not shown) provided on the first surface of the circuit board 190, and the pads (not shown) may be connected to the first and second pads of the circuit board 190. It may be electrically connected to any one of the two terminals 91 and 92 corresponding thereto.

A driving signal may be provided to the coil 120 through the first and second terminals 91 and 92 of the circuit board 190 .

Next, the first roller unit 150 and the second roller unit 160 will be described.

The first roller unit 150 may be disposed within the first groove 51a and may contact at least two or more areas of the first groove 51a. For example, the first roller unit 150 (eg, each of the rollers P1 to P3) may contact four areas of the first groove 51a.

The second roller unit 160 may be disposed in the second groove 51b and may contact at least two or more areas of the second groove 51b. For example, the second roller unit 160 (eg, each of the rollers Q1 to Q3) may contact four regions of the second groove 51b.

The first roller unit 150 includes at least one roller (eg, P1 to P3) and is disposed in the first groove 51a of the first pillar unit 216a of the base 210.

The second roller unit 160 includes at least one roller (eg, Q1 to Q3) and is disposed in the second groove 51b of the second pillar unit 216b of the base 210.

The first roller unit 150 may contact the first support unit 116a of the bobbin 110 and the second roller unit 150 may contact the second support unit 116b of the bobbin 110 .

When the bobbin 110 moves in the optical axis direction, each of the first roller unit 150 and the second roller unit 160 in contact with the first and second support units 116a and 116b performs a rolling motion or a rotational motion. Therefore, it is possible to support the movement of the bobbin 110 in the optical axis direction and guide the movement of the bobbin 110 in the optical axis direction.

Frictional force may act between the first and second roller parts 150 and 160 and the first and second support parts 116a and 116b of the bobbin 110, and this frictional force is applied between the first and second roller parts and the first and second support parts 116a and 116b. and the contact area between the second supports. That is, as the contact area between the two increases, the frictional force may increase.

Each of the first and second roller units 150 and 160 may include a plurality of rollers. For example, the number of rollers included in each of the first and second roller units 150 and 160 may be 2, 3, 4 or more.

The first roller unit 150 may include three rollers P1 to P3, but is not limited thereto, and the number of rollers may be one or more.

The second roller unit 160 may include three rollers Q1 to Q3, but is not limited thereto, and the number of rollers may be one or more.

5 is an enlarged view of the first groove 51a provided in the first pillar portion 216a, FIG. 6 is an enlarged view of the roller P1 shown in FIG. 4, and FIG. 7 is excluding the cover member 300. A plan view of the lens driving device 100, FIG. 8 is a cross-sectional view of the lens driving device 100 shown in FIG. 7 in an AB direction, and FIG. 9 is a cross-sectional view of the lens driving device 100 shown in FIG. 7 in a CD direction. am.

5 to 9 , the first groove 51a may include a side surface 51-1 and a bottom 51-2.

The bottom 51-2 of the first groove 51a may have a step in the optical axis direction from the top surface 210a of the base 210. For example, based on the lower surface of the base 210, the bottom 51-2 of the first groove 51a may be located higher than the upper surface 210a of the base 210.

A groove 60 or a hole may be provided in the bottom 51-2 of the first groove 51a. For example, the groove 50 may expose the upper surface of the base 210, but is not limited thereto.

The bottom 51-2 of the first groove 51a may include a first bottom 51-2a and a second bottom 51-2b spaced apart from each other, the first bottom 51-2a and the second bottom 51-2a. A groove 60 may be disposed between the two floors 51-2b.

The area of the bottom 51-2 of the first groove 51a contacted by the roller P3 by the groove 60 may be reduced, and thus the frictional force between the roller P3 and the first pillar portion 216a. This can be reduced, and thus the frictional force between the roller P3 and the first support part 116a can also be reduced.

A first opening 61 open to an inner surface of the first pillar portion 216a may be provided on the first side surface 51-1a of the first groove 51a, and the second opening 61 of the first groove 51a may be provided. A first guide groove 52a may be provided on the side surface 51-1b.

The first opening 61 of the first pillar portion 216a may expose portions or one surface of the rollers P1 to P3 inserted or disposed in the first groove 51a.

The first opening 61 may have a size sufficient to insert the first support part 116a.

For example, the length D2 of the first opening 61 in the horizontal direction may be greater than the length D1 of the first support 116a in the horizontal direction (D2>D1), and the length D2 of the first opening 61 in the vertical direction The length H2 of may be greater than or equal to the length H1 of the first support part 116a in the vertical direction (H2≥H1).

For example, the first support portion 116a may be inserted into the first opening 61 and come into contact with the rollers P1 to P3 disposed in the first groove 51a, and the first pillar portion of the base 210 ( 216a) and may be spaced apart.

The first guide groove 52a may have a shape recessed from the second side surface 51-1b of the first groove 51a, and may have a semicircular or semicylindrical shape, but the shape is not limited thereto.

For example, the height of the bottom 52-1 of the first guide groove 52a may be the same as the height of the bottom 51-2 of the first groove 52a, but is not limited thereto.

Referring to FIG. 6 , the roller P1 may have a cylindrical or cylindrical shape, but is not limited thereto.

The length (L) of the roller (P1) may be greater than the diameter (R) of the roller (P1).

The ratio of the length R of the diameter in the circumferential direction of each of the rollers (eg, P1 to P3) and the length L in the height direction of each of the rollers (eg, P1 to P3) may be 1:1.5 to 1:5. there is.

For example, the ratio (R:L) of the diameter (R) of the roller (P1) and the length (L) of the roller (P1) may be 1:1.5 to 1:5.

For example, the ratio of the diameter to the length (R:L) may be 1:2 to 1:3.

For example, when the ratio (L/R) of the length of the roller to the diameter of the roller P1 is less than 1.5, the effect of preventing the bobbin 110 from flowing in the X-axis direction or the Y-axis direction may be reduced.

When the ratio (L/R) of the length of the roller to the diameter of the roller P1 exceeds 5, the size of the first pillar portion 216a for accommodating the roller may increase, and the coil 120 and the circuit Spatial interference with the substrate 190 may occur.

The second groove 51b provided in the second pillar portion 216b may also have the same shape as the first groove 51a, and the description of the first groove 51a in FIG. 5 is the same for the second groove 51b. can be applied

In addition, the description of the roller P1 of FIG. 6 may be equally applied to the remaining rollers P2 and P3 of the first roller unit 150 and the rollers Q1 to Q3 of the second roller unit 160. .

In order to prevent the first roller unit 150 and the second roller unit 160 from being separated from the first groove 51a and the second groove 51b, the cover member 300 includes the first protrusion 311 and 2 protrusions 312 may be provided.

The first protrusion 311 of the cover member 300 may be inserted or disposed, and the second protrusion 312 of the cover member 300 may be inserted or disposed in the second guide groove 52b.

FIG. 11 shows a part of the cross-sectional view in the CD direction of FIG. 7 . The cross-sectional view of FIG. 11 shows the cover member 300 .

Referring to FIGS. 1 and 11 , the cover member 300 may include a first protrusion 311 corresponding to the first roller unit 150 and protruding from the inner surface of the top plate.

In addition, the cover member 300 may include a second protrusion 312 corresponding to the second roller unit 160 and protruding from the inner surface of the top plate.

The first protrusion 311 may protrude downward from the inner surface of the upper surface of the cover member 300 and may be inserted or disposed in the first groove 51a and the first guide groove 52a.

The second protrusion 312 may protrude downward from the inner surface of the upper surface of the cover member 300 and may be inserted or disposed in the second groove 51b and the second guide groove 52b.

Each of the first protrusion 311 and the second protrusion 312 may have a groove recessed from the top surface of the top plate of the cover member 330 .

Referring to FIG. 7 , the center 7a of the opening 101 of the bobbin 110 is not aligned with the center 7b of the base 210, and the center 7b of the base 210 is closer to the magnet 130. can be located farther away. For example, the center of the lens mounted on the bobbin 110 may be located farther from the magnet 130 than the center 7b of the base 210.

For example, the center 7b of the base 210 may be located between the center 7a of the opening 101 of the bobbin 110 and the magnet 130 .

The protruding parts 118a to 118d of the bobbin 110 may be positioned between the pillar parts 216a to 216d of the base 210 . For example, each of the protruding parts 118a to 118d of the bobbin 110 may be positioned between two neighboring pillar parts 216a and 216b, 216b and 216c, 216c and 216d, and 216d and 216a. As the protrusions 118a to 118d of the bobbin 110 are disposed in the space between the pillar portions 216a and 216b, 216b and 216c, 216c and 216d, and 216d and 216a, the lens driving device 100 can reduce the size. can be reduced or reduced.

Each of the rollers P1 to P3 and Q1 to Q3 of the first and second roller units 150 and 160 may contact side surfaces (eg, 51-1) of the first and second grooves 51a and 51b. there is. For example, outer surfaces of each of the rollers P1 to P3 and Q1 to Q3 may be in surface contact with side surfaces (eg, 51-1) of the first and second grooves 51a and 51b.

In another embodiment, a plurality of protrusions may be provided on the side surface (eg, 51-1) of the first and second grooves 51a and 51b, and the plurality of protrusions may form rollers P1 to P3 and Q1 to Q3. It can be in contact with the outer surface of.

14a to 14c are partial perspective views of a base 210A according to other embodiments.

14A to 14C, a plurality of protrusions corresponding to the rollers P1 to P3 are formed on the side surfaces 51-1a, 51-1b, and 51-1c of the first groove 51a of the base 210A. (14a to 14c or 14d) may be provided.

In FIG. 14A , protrusions 14a, 14b, and 14c may be disposed on the first side surface 51-1a and the second side surface 51-1b of the first groove 51a, respectively.

In FIG. 14B , the protrusions 14a, 14b, and 14c may be disposed on the first to third side surfaces 51-1a, 51-1b, and 51-1c of the first groove 51a, respectively.

14a and 14b, the protrusions 14a, 14b, and 14c may have a hemispherical shape. In FIG. 14C, the protrusion 14d may have a protruding shape in the form of a line or a straight line, and its cross section may have a hemispherical or dome shape.

The outer circumferential surface or side surface of each of the rollers P1 to P3 and Q1 to Q3 may be in contact with the plurality of protrusions 14a to 14d, and the first to third side surfaces 51-1a of the first groove 51a. , 51-1b, 51-1c).

A plurality of protrusions corresponding to the rollers Q1 to Q3 may be provided on the side of the second groove 51b of the bobbin 110, and the first groove of the bobbin 110 shown in FIGS. 14A to 14C ( Description of the protrusions 14a to 14d provided on the side surface of 51b) may be equally applied to the second groove 51b of the bobbin 110.

Since the rollers P1 to P3 and Q1 to Q3 in FIGS. 14A to 14C may be in point contact or line contact with the protrusions 14a to 14d, compared to the base 210 shown in FIG. 1, FIG. Frictional force between the base 210A of FIGS. 14A to 14C and the rollers P1, P2, and P3 may be reduced.

Referring to FIG. 8 , in the initial position of the AF movable part (eg, bobbin 110), the coil 120 moves the magnet 130 and the coil 120 from the first pillar part 216a to the fourth pillar part 216d. may overlap.

Here, the initial position of the AF movable part, for example, the bobbin 110 , may be the initial position of the AF movable part in a state in which power is not applied to the coil 120 . In addition, the initial position of the AF movable part may be a position where 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. there is.

For example, the upper part 120-1 of the coil 120 may overlap the first magnet part 31 of the magnet 130 in a direction from the first pillar part 216a to the fourth pillar part 216d. , The lower part 120-2 of the coil 120 may overlap the second magnet part 32 of the magnet 130, and between the upper part 120-1 and the lower part 120-2 of the coil 120 The space of may overlap with the non-magnetic barrier rib 33 of the magnet 130 .

10 is a partial enlarged view of FIG. 7 . The description of FIG. 10 may also be applied to the second roller part 1160 and the second support part 116b of the bobbin 110 .

Referring to FIGS. 7 and 10 , the rollers P1 to P3 of the first roller unit 150 may be disposed to be inclined at a first angle θ1 with respect to the first reference line 501 .

Also, the rollers Q1 to Q3 of the second roller unit 160 may be disposed to be inclined at a second angle (not shown) with respect to the first reference line.

Here, the first reference line 501 may be an imaginary straight line (eg, an X-axis) parallel to a direction from the first pillar part 216a to the second pillar part 216b.

For example, the first reference line 502 may pass through a point where the rollers (eg, P1 , P2 , and P3 ) of the first roller unit 150 and the first support portion 116a of the bobbin 110 meet. Alternatively, the first reference line may pass through a point where the rollers (eg, Q1 , Q2 , and Q3 ) of the second roller unit 160 and the second support portion 116b of the bobbin 110 meet.

For example, the central axes 601 (see FIG. 6 ) of the rollers (eg, P1 , P2 , and P3 ) may be inclined by a first angle θ1 with respect to the first reference line 501 . Also, for example, the central axes of the rollers (eg, Q1, Q2, and Q3) of the second roller unit 160 may be inclined by a second angle with respect to the first reference line.

For example, the first angle θ1 may be an angle between the central axis 601 (see FIG. 6 ) of the rollers (eg, P1 , P2 , and P3 ) and the first reference line 501 , and the second angle is the second roller It may be the angle between the central axis of the rollers (eg, Q1 , Q2 , and Q3 ) of portion 160 and the first reference line.

For example, the first angle θ1 is an angle at which the central axis 601 of the rollers (eg, P1, P2, and P3) of the first roller unit 150 is rotated clockwise with respect to the first reference line 501. can

Also, the second angle may be an angle at which central axes of the rollers (eg, Q1, Q2, and Q3) of the second roller unit 160 are rotated clockwise with respect to the first reference line.

For example, the central axis (601, see FIG. 6) of the rollers (eg, P1, P2, and P3) of the first roller unit 150 passes through the center or center of the roller (eg, P1, P2, and P3), and the roller (eg, P1, P2, and P3). For example, it may be an axis parallel to the longitudinal direction of P1, P2, P3). For example, the center of the roller (eg P1, P2, P3) may be the center of the diameter. The description of the central axis 601 of the rollers (eg, P1, P2, and P3) of the first roller unit 150 is about the central axis of the rollers (eg, Q1, Q2, and Q3) of the second roller unit 160. can be applied

Each of the rollers (eg, P1, P2, and P3) may be rotatably arranged around an axis perpendicular to the optical axis.

For example, the rollers (eg, P1 , P2 , and P3 ) may be disposed such that the central axis 601 is perpendicular to the optical axis OA, and may rotate about the central axis 601 as an axis. Also, for example, the rollers (eg, Q1 , Q2 , and Q3 ) of the second roller unit 160 may be disposed such that their central axis is perpendicular to the optical axis OA, and may rotate around the central axis.

The first angle θ1 and the second angle may be different from each other.

For example, the first angle θ1 may be 30 degrees to 60 degrees, and the second angle may be 120 degrees to 150 degrees. For example, the second angle may be a value obtained by subtracting the first angle θ1 from 180 degrees.

Alternatively, for example, the first angle θ1 may be 40 degrees to 50 degrees.

Alternatively, for example, the first angle θ1 may be 43 degrees to 47 degrees.

For example, the first angle θ1 may be 45 degrees.

When the first angle θ1 is less than 40 degrees, the effect of suppressing the flow of the bobbin 110 in the X-axis direction may be reduced, and when the first angle θ1 is less than 40 degrees, the bobbin 110 The effect of suppressing the flow in the X-axis direction may be reduced, and when the first angle θ1 is greater than 60 degrees, the effect of suppressing the flow of the bobbin 110 in the Y-axis direction may be reduced.

The rollers P1 to P3 of the first roller unit 150 are arranged to be inclined at a first angle θ1 with respect to the first reference line 501, and the rollers Q1 to Q3 of the second roller unit 1160 ) is disposed to be inclined at a second angle with respect to the first reference line, in a direction parallel to the first reference line 501 (eg, the X-axis direction) or in a direction parallel to the second reference line 502 (eg, the Y-axis direction). direction) can suppress the flow of the bobbin 110. For example, the second reference line 502 may be an imaginary straight line perpendicular to the first reference line 501 .

Also, for example, when the first angle θ1 is 45 degrees and the second angle is 135 degrees, the rollers P1 to P3 of the first roller unit 150 and the rollers Q1 of the second roller unit 160 , Q2, Q3) can suppress the flow of the bobbin 110 in a balanced manner in the X-axis direction and the Y-axis direction.

For example, the central line 503 of the first support part 116a of the bobbin 110 and the central axis 601 of the roller (eg, P1, P2, or P3) may be perpendicular to each other, and the second The center line of the support portion 116b and the center axis of the roller (eg, Q1, Q2, or Q3) may be perpendicular to each other, but are not limited thereto.

The center line 503 of the first support portion 116a may be a line passing through a point in contact with a roller (eg, P1, P2, or P3) and bisecting the first support portion 116a. For example, the center line 503 may be a line that symmetrically bisects the first support portion 116a.

In addition, the center line of the second support portion 116b may be a line passing through a point in contact with the roller (eg, Q1, Q2, or Q3) and bisecting the second support portion 116b. For example, the center line of the second support portion 116b may be a line that symmetrically divides the second support portion 116b into two halves.

In FIG. 10 , the description of the arrangement of the rollers P1 to P3 of the first roller unit 150 may be equally applied to the arrangement of the rollers Q1 to Q3 of the second roller unit 160 .

The first roller part 150 and the second roller part 160 are parallel to the direction from the first pillar part 216a to the fourth pillar part 216d, and the center of the opening 101 of the bobbin 110 It may be arranged symmetrically on the left and right based on the passing center line (701, see FIG. 7).

Next, the magnetic body 195 will be described.

The magnetic material 195 is disposed on the base 210 and may be located below the coil 120 .

For example, the magnetic material 195 may be disposed on an outer surface of the base 210 .

For example, an attractive force may be applied between the magnetic material 195 and the magnet 130 .

For example, the magnetic material 195 may be positioned below the magnet 130 based on the lower surface of the base 210 and may serve to suppress tilt from occurring when the bobbin 110 moves. The magnetic material 195 may be expressed as a "tilt suppressor", a "tilt corrector", or a "tilt controller" in the sense of suppressing the tilt of the bobbin 1110.

In the lens driving device 100 according to the embodiment, the magnet 130 is disposed on only one side surface 110b-1 of the bobbin 110, and only one coil 120 is disposed corresponding to one magnet 130. Therefore, an imbalance of electromagnetic force may exist between one side (eg, 110b-1) and the opposite side (110b-3) of the bobbin 110 on which the magnet 130 is disposed.

Tilt may be generated when the bobbin 110 moves due to the imbalance of the electromagnetic force. Since the magnetic material 195 is made of a material attached to the magnet 130, it is possible to suppress such tilt from occurring.

The magnetic material 195 may be made of a material attached to a magnet, for example, a magnetic material (eg, a magnetic metal material).

In another embodiment, the magnetic body 1195 may be implemented with a material attached to a magnet, for example, a metal material (eg, iron).

The magnetic material 195 may be disposed on the outer surface of the first and second pillar parts 216a and 216b and the outer surface of the first side part 218a of the body 213 of the base 210 . For example, the magnetic material 195 may be disposed within the second mounting groove 42 .

The magnetic body 195 may have a plate shape. For example, the magnetic body 195 includes a plate 195-1, a first extension 195-2 extending upward from one end of the plate 195-1, and a second extension extending upward from the other end of the plate 195-1. 2 extensions 195-3 may be included.

The plate 195 - 1 of the magnetic material 195 may be disposed on an outer surface of the first side portion 218a of the body 213 of the base 210 . For example, the magnetic material 195 may be fixed or attached to the base 210 by an adhesive member.

The first extension part 195 - 2 may be disposed on a side surface (eg, an outer surface) of the first pillar part 216a and may extend from the lower surface of the base 210 toward the upper surface.

The second extension part 195 - 3 may be disposed on a side surface (eg, an outer surface) of the second pillar part 216b and may extend from the lower surface of the base 210 toward the upper surface.

The first and second extensions 195 - 2 and 195 - 3 may improve coupling force between the magnetic body 195 and the base 210 .

In order to increase the force acting between the magnet 130 and the magnetic body 195, the horizontal length of the plate 195-1 of the magnetic body 195 (L1, see FIG. 4) is the length of the magnet 130 in the horizontal direction. It may be greater than (L2, see FIG. 2), but is not limited thereto. In another embodiment, L1 may be the same as L2.

Since an attractive force acts between the magnetic body 195 and the magnet 130, it may serve to set the initial position of the bobbin 110 even when a driving signal is not provided to the coil 120.

For example, when a driving signal is not provided to the coil 120, the bobbin 110 may be raised to the lowest position by the attractive force acting between the magnetic body 195 and the magnet 130. Here, the lowest position of the bobbin 110 may be a position with the lowest height relative to the base 210 among the displacements of the bobbin 110 . In this case, the lowest position of the bobbin 110 may be the initial position of the bobbin 110.

For example, when a driving signal is not provided to the coil 120, the force acting between the magnetic body 195 and the magnet 130 may be greater than or equal to the force required to place the bobbin 110 in the lowest position. .

Since the initial position of the bobbin 110 can be set by the attractive force between the magnetic body 195 and the magnet 130, an accurate AF operation can be performed even without a separate position sensor.

Since the center of the bobbin 110 and the center of the base are not aligned and one magnet 130 is used, the number of parts can be reduced in the embodiment.

Compared to a lens driving device using a spring, since the embodiment includes a roller instead of a spring, the embodiment can consume less current during AF driving and increases the AF driving speed because the settling time is small. can make it

Since the magnetic material 195 and the magnet 130 are disposed on either side 218a of the body 213 of the base 210, tilt correction and driving may be simultaneously performed.

The rotation and driving of the first and second roller units 150 and 160 can be smoothly performed by the lubricant introduced into the first and second grooves 51a and 51b through the first and second guide grooves 52a and 52b. can

In addition, since the rollers P1 to P3 and Q1 to Q3 are inclined by a predetermined angle with respect to the first reference line 501, the embodiment can suppress the induction of the bobbin 110 in the X-axis and Y-axis directions. can

Since the cover member 300 is provided with first and second protrusions 311 and 312, the embodiment prevents the rollers P1 to P3 and Q1 to Q3 from being separated from the first and second grooves 51a and 51b. It can be prevented.

Although a position sensor is not provided in the embodiments shown in FIGS. 1 to 11 , the present invention is not limited thereto, and a lens driving device according to another embodiment may further include a position sensor.

FIG. 12 shows a position sensor 170 additionally provided in the lens driving device 100, and FIG. 13 shows a cross-sectional view of an embodiment including the position sensor 170 of FIG.

Referring to FIGS. 12 and 13 , the position sensor 170 is disposed or mounted on a circuit board 190 and may be located in an empty space in the center of the coil 120 .

For example, the position sensor 170 may be located in a space between the upper part 120-1 and the lower part 120-2 of the coil 120.

For example, the position sensor 170 may overlap the non-magnetic barrier rib 33 of the magnet 130 in a direction from the first pillar part 216a to the fourth pillar part 216d.

The position sensor 170 may detect the strength of the magnetic field of the magnet 130 mounted on the bobbin 110 according to the movement of the bobbin 110 and output an output signal according to the detected result. The position sensor 170 may be disposed on the first surface of the circuit board 190 . Here, the first surface of the circuit board 190 may be a surface on which the coil 120 is disposed.

The position sensor 170 may be implemented in the form of a driver IC including a Hall sensor or a position detection sensor such as a Hall sensor alone.

For example, when the position sensor 170 is implemented with only a Hall sensor, the position sensor 170 may include two input terminals and two output terminals.

The circuit board 190 may be electrically connected to the position sensor 170 . For example, four terminals of the position sensor 170 may be electrically connected to the circuit board 190, and the circuit board 190 may further include terminals electrically connected to the four terminals of the position sensor 170. can For example, the circuit board 190 may include two terminals electrically connected to the coil 120 and four terminals electrically connected to the position sensor 170 .

If the position sensor 170 is a driver IC including a Hall sensor, since a driving signal can be provided from the position sensor 170 to the coil 120, the circuit board 190 is ) and four terminals electrically connected.

15 is a perspective view of a bobbin according to another embodiment, FIG. 16 is a perspective view of a base according to another embodiment, FIG. 17 is a combined perspective view of the bobbin of FIG. 15 and the base of FIG. 16, and FIG. 18 is the bobbin of FIG. 15 , a perspective view of the base, the first and second roller units 150 and 160, the first coil 120 and the circuit board 190 of FIG. 16 .

In FIGS. 15 to 18, the same reference numerals as those in FIGS. 1 to 13 denote the same configurations, and descriptions of the same configurations are simplified or omitted.

Referring to FIGS. 15 to 18 , the bobbin of FIG. 15 may include a first groove for supporting the first roller unit 150 and a second groove for supporting the second roller unit 160 .

For example, the bobbin of FIG. 15 may include a first support groove 15a located on the right side of the first support part 116a and a second support groove 15b located on the left side of the first support part 116a.

In addition, the bobbin of FIG. 15 may include a third support groove 15c located on the left side of the second support part 116b and a fourth support groove 15d located on the right side of the second support part 116b.

For example, the first support groove 15a may be located on either side of the first protrusion 118a located on the right side of the first support part 116a, and the second support groove 15b may be located on the first support part 116a. ) may be located on either side of the fourth protrusion 118d located on the left side.

For example, the third support groove 15c may be located on the other side of the first protrusion 118a located on the left side of the second support part 116a, and the fourth support groove 15d may be located on the second support part ( It may be located on either side of the second protrusion 118b located on the right side of 116b).

On the inner surface of the first pillar portion 216a of the base of FIG. 16, a first seating groove 16a corresponding to the first support groove 15a of the bobbin of FIG. 15 and a second support groove 15b corresponding to the second support groove 15b of FIG. 2 seating grooves 16b may be provided.

On the inner surface of the second pillar portion 216b of the base of FIG. 16, a third seating groove 16c corresponding to the third support groove 15c and a fourth support groove 15d of the bobbin shown in FIG. 4 seating grooves 16d may be provided.

Referring to FIG. 17, the first and second support grooves 15a and 15b of the bobbin of FIG. 15 and the first and second seating grooves 16a of the first pillar portion 216a of FIG. 16 corresponding thereto, 16b) may form a first groove into which the first roller unit 150 can be inserted, disposed, or seated.

In addition, the third and fourth support grooves 15c and 15d of the bobbin of FIG. 15 and the third and fourth seating grooves 16c and 16d of the second pillar portion 216b of FIG. A second groove may be formed into which the roller unit 160 may be inserted, disposed, or seated.

Referring to FIG. 18, the first roller unit 150 is configured to seat the first and second support grooves 15a and 15b of the bobbin of FIG. 15 and the first and second pillars 216a of FIG. 16. It can contact the grooves 16a and 16b.

The second roller unit 160 includes the third and fourth support grooves 15c and 15d of the bobbin of FIG. 15 and the third and fourth seating grooves 16c and 16d of the second column part 216b of FIG. 16 ) can be contacted.

In the embodiments of FIGS. 1 to 13 , the first roller unit 150 is inserted or disposed in the first groove 51a formed in the first pillar unit 216a, and the second roller unit 160 is inserted into the second pillar unit 216a. It is inserted or placed into the second groove 51b formed in the portion 216b.

However, in the embodiments of FIGS. 15 to 18, the first to fourth support grooves 15a to 15d provided on the bobbin and the first and second seating grooves provided on the first and second pillar parts 216a and 216d ( The first and second roller units 150 and 160 may be disposed or seated in the grooves formed by 16a to 16d).

The description of FIGS. 7 to 10 may also be applied to the embodiments of FIGS. 15 to 18 .

The protrusions 14a, 14b, 14c, and 14d shown in FIGS. 14a to 14c may be applied to the embodiments of FIGS. 15 to 18, and descriptions of the protrusions 14a, 14b1, and 14 may be cited. .

The position sensor 170 shown in FIG. 12 may be applied to the embodiments of FIGS. 15 to 18, and a description of the position sensor 170 may be cited.

19 is an exploded perspective view of a camera module 200 according to an embodiment.

Referring to FIG. 19 , 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 controller 830, and a connector 840. The lens driving device 100 may be an embodiment according to the embodiments described with reference to FIGS. 1 to 18 .

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

The first holder 600 may be disposed 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 have 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 an epoxy, a thermosetting adhesive, or an ultraviolet curable adhesive.

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

An opening 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 may be incident to the image sensor 810 .

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

The second holder 800 may be provided with various circuits, elements, and controllers to convert an image formed by the image sensor 810 into an electrical signal and transmit the electrical signal to an external device. The second holder 800 may be implemented as a circuit board on which an image sensor may be mounted, a circuit pattern may be formed, and various elements may be coupled.

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 spaced apart from each other so as to face each other in the first direction.

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

The motion sensor 820 outputs rotational angular velocity information caused by 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 controller 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 and may provide a driving signal to the coil 120 .

The connector 840 is electrically connected to the second holder 800 and may include a port to be electrically connected to an external device.

20 shows a perspective view of a portable terminal 200A according to an embodiment, and FIG. 21 shows a configuration diagram of the portable terminal 200A shown in FIG. 20 .

20 and 21, a portable terminal (200A, hereinafter referred to as a “terminal”) includes a body 850, a wireless communication unit 710, an A/V input unit 720, a sensing unit 740, an input/output unit, 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. 20 has a bar shape, but is not limited thereto, and is a slide type, folder type, or swing type in which two or more sub-bodies are coupled to be relatively movable. , and may have various structures such as a swivel type.

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

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

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

The camera 721 may include the camera module 200 according to the embodiment shown in FIG. 19 .

The sensing unit 740 detects the current state of the terminal 200A, such as the open/closed state of the terminal 200A, the location of the terminal 200A, whether or not there is a user contact, the direction of the terminal 200A, and the acceleration/deceleration of the terminal 200A. By sensing, a sensing signal for controlling the operation of the terminal 200A may be generated. For example, when the terminal 200A is in the form of a slide phone, whether the slide phone is opened or closed may be sensed. In addition, it is responsible for sensing functions related to whether or not the power supply unit 790 supplies power and whether or not the interface unit 770 is connected to an external device.

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

The input/output unit 750 may include a keypad unit 730, a display module 751, a sound output module 752, and a touch screen panel 753. The keypad unit 730 may generate input data by keypad 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, a 3D At least one of 3D displays may be included.

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

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

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

The interface unit 770 serves as a passage through which an external device connected to the terminal 200A is connected. The interface unit 770 receives data from an external device or 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 may include a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port connecting a device having an identification module, an audio I/O (Input/ Output) port, video I/O (Input/Output) port, and earphone port.

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

The controller 780 may include a multimedia module 781 for playing multimedia. The multimedia module 781 may be implemented within the control unit 780 or may be implemented separately from the control unit 780.

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

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

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.

Claims (18)

A body, a first pillar part disposed at a first corner part of the body, a second pillar part disposed at a second corner part of the body, a third pillar part disposed at a third corner part of the body, and the body A base including a fourth pillar portion disposed on a fourth corner portion of the;
a bobbin disposed on the body;
a first rolling motion member disposed in a first groove provided in the first pillar portion;
a second rolling member disposed in a second groove provided in the second pillar part adjacent to the first pillar part;
a magnet disposed on the bobbin; and
And a coil disposed between the first pillar part and the second pillar part in correspondence with the magnet,
The first groove includes a first opening exposing a part of the first rolling member,
The second groove includes a second opening exposing a part of the second rolling member,
The bobbin,
a first support portion protruding from an outer surface of the bobbin and extending into the first opening and contacting the first rolling member; and
and a second support portion protruding from the outer surface of the bobbin, extending into the second opening, and contacting the second rolling member. According to claim 1,
The first rolling motion member contacts at least two or more areas of the first groove;
The second rolling motion member contacts at least two or more regions of the second groove. According to claim 1,
the first rolling member contacts four regions of the first groove;
The second rolling motion member contacts four regions of the second groove. According to claim 1,
Further comprising a circuit board fixed to the base and to which the coil is coupled;
The lens driving device of claim 1 , wherein the circuit board is fixed to the first pillar part and the second pillar part. According to claim 4,
The circuit board includes a terminal electrically connected to the coil,
The terminal includes a first terminal and a second terminal, and the terminal is disposed on the body of the base. According to claim 1,
A lens driving device including a magnetic material disposed on the base under the coil and having an attractive force with the magnet. According to claim 6,
The magnetic material is a lens driving device disposed on an outer surface of the base. The method of claim 7, wherein the magnetic body,
a plate disposed on an outer surface of the body of the base;
a first extension portion disposed on an outer surface of the first pillar portion and extending upward from the plate; and
and a second extension portion disposed on an outer surface of the second pillar portion and extending upward from the plate. According to claim 1,
Each of the first rolling member and the second rolling member includes a plurality of rollers,
Each of the rollers is a lens driving device having a cylindrical shape. According to claim 9,
The lens driving device of claim 1 , wherein each of the first rolling member and the second rolling member is rotatably disposed about an axis perpendicular to an optical axis. According to claim 9,
The lens driving device of claim 1 , wherein a ratio of a length of a circumferential diameter of the plurality of rollers to a length of a height direction of the rollers is 1:1.5 to 1:5. According to claim 1,
The bobbin includes first to fourth protrusions disposed on a side surface,
The magnet is disposed in a seating groove provided in the first protrusion,
The first protrusion is disposed between the first pillar part and the second pillar part, the second protrusion part is disposed between the second pillar part and the third pillar part, and the third protrusion is disposed between the third pillar part and the third protrusion part. A lens driving device disposed between a pillar part and the fourth pillar part, and wherein the fourth protrusion part is disposed between the fourth pillar part and the first pillar part. According to claim 1,
The first rolling motion member is disposed to be inclined at a first angle with respect to a first reference line,
The second rolling member is disposed to be inclined at a second angle with respect to the first reference line,
The first reference line is an imaginary straight line parallel to a direction from the first pillar part to the second pillar part, and the first angle is different from the second angle. According to claim 13,
The angle between the central axis of the first rolling motion member and the first reference line is 30 degrees to 60 degrees,
The central axis is an axis passing through the center of the diameter of the first rolling member and parallel to the longitudinal direction of the first rolling member;
The lens driving device of claim 1 , wherein the first rolling member is rotatable around the central axis. According to claim 1,
Further comprising a lubricant disposed in the first groove and the second groove,
wherein the lubricant contacts the first groove and the first rolling member, and contacts the second groove and the second rolling member. A body, a first pillar part disposed at a first corner part of the body, a second pillar part disposed at a second corner part of the body, a third pillar part disposed at a third corner part of the body, and the body A base including a fourth pillar portion disposed on a fourth corner portion of the;
a bobbin disposed on the body;
a first rolling motion member disposed in a first groove provided in the first pillar portion;
a second rolling member disposed in a second groove provided in the second pillar part adjacent to the first pillar part;
a magnet disposed on the bobbin; and
And a coil disposed between the first pillar part and the second pillar part in correspondence with the magnet,
the first rolling member contacts four regions of the first groove, and the second rolling member contacts four regions of the second groove;
The first groove includes a first opening exposing a part of the first rolling member, and the second groove includes a second opening exposing a part of the second rolling member,
The bobbin includes a first support part disposed in the first opening and contacting the first rolling member, and a second support part disposed in the second opening and contacting the second rolling member. A body, and a first pillar part disposed at a first corner part of the body, a second pillar part disposed at a second corner part of the body, a third pillar part disposed at a third corner part of the body, and the a base including a fourth pillar portion disposed at a fourth corner portion of the body;
a bobbin disposed on the body;
a first rolling motion member disposed in a first groove provided in the first pillar portion;
a second rolling member disposed in a second groove provided in the second pillar part adjacent to the first pillar part;
a magnet disposed on the bobbin;
a coil disposed between the first pillar part and the second pillar part in correspondence with the magnet; and
A magnetic material disposed on an outer surface of the base under the coil and having an attractive force with the magnet,
The first groove includes a first opening exposing a part of the first rolling member, and the second groove includes a second opening exposing a part of the second rolling member;
the bobbin includes a first support part disposed in the first opening and contacting the first rolling member and a second support part disposed in the second opening and contacting the second rolling member;
The magnetic body,
a plate disposed on an outer surface of the body of the base;
a first extension portion disposed on an outer surface of the first pillar portion and extending upward from the plate; and
and a second extension portion disposed on an outer surface of the second pillar portion and extending upward from the plate. A body, a first pillar part disposed at a first corner part of the body, a second pillar part disposed at a second corner part of the body, a third pillar part disposed at a third corner part of the body, and the body A base including a fourth pillar portion disposed on a fourth corner portion of the;
a bobbin disposed on the body;
a first rolling motion member disposed in a first groove provided in the first pillar portion;
a second rolling member disposed in a second groove provided in the second pillar part adjacent to the first pillar part;
a magnet disposed on the bobbin; and
And a coil disposed between the first pillar part and the second pillar part in correspondence with the magnet,
The first groove includes a first opening exposing a part of the first rolling member, and the second groove includes a second opening exposing a part of the second rolling member;
The bobbin,
a first support portion disposed in the first opening and contacting the first rolling member;
a second support disposed in the second opening and contacting the second rolling member;
The first rolling member is disposed to be inclined at a first angle with respect to the first reference line, the second rolling member is disposed to be inclined at a second angle with respect to the first reference line, and the first reference line is disposed to be inclined at a second angle. An imaginary straight line parallel to a direction from the first pillar portion to the second pillar portion, wherein the first angle is different from the second angle.

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