KR102570061B1 - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

This embodiment covers; a housing disposed inside the cover; a bobbin disposed inside the housing and having holes formed in a vertical direction; a coil disposed on an outer circumferential surface of the bobbin; It is disposed on the housing and includes a magnet disposed to correspond to the coil, and the cover includes a first side plate, a second side plate connected to the first side plate, and a second side plate disposed opposite to the first side plate. A third side plate connected to and a fourth side plate connected to the third side plate and the first side plate, wherein the housing includes a first side part disposed at a position corresponding to the first side plate of the cover, and A second side part disposed at a position corresponding to the second side plate and a third side part disposed at a position corresponding to the fourth side plate of the cover, and disposed at a position corresponding to the third side plate of the cover The outer surface of the coil is opposite to the inner surface of the third side plate of the cover, and the shortest distance between the vertical central axis of the bobbin hole and the first side plate of the cover is the vertical central axis of the bobbin hole and It relates to a lens driving device that is longer than the shortest distance between the third side plates of the cover, a camera module, and an optical device.

Description

Lens driving device, camera module and optical device {LENS DRIVING DEVICE, CAMERA MODULE AND OPTICAL APPARATUS}

This embodiment relates to a lens driving device, a camera module, and an optical device.

The contents described below provide background information on the present embodiment, but do not describe the prior art.

As the spread of various smart devices is widely generalized and wireless Internet services are commercialized, consumers' demands related to portable terminals are also diversifying, and various types of additional devices are being installed in smart devices. Among them, a typical example is a "camera module" that takes a picture or video of a subject.

A smart device equipped with a camera module is referred to as an “optical device”. Recently, a camera module equipped with a "lens driving device" that performs an auto focus function by automatically adjusting a focus according to a distance to a subject has appeared.

On the other hand, the display panel disposed on the front of the frame of the optical device is getting wider due to the demand of the consumer. As shown in FIG. 1 , the width of the display panel may increase as the size of the bezel of the optical device is reduced. In order to reduce the size of the bezel of the optical device, the cover glass must be moved to the edge of the frame.

The cover glass is glass that protects the camera module, and the center of the cover glass is located on the optical axis of the camera module.

If the optical axis of the lens module can be moved (shifted) to the edge of the frame within the camera module, the cover glass can be moved to the edge of the frame more compared to a camera module of the same size. As a result, the size of the bezel of the optical device is reduced, and the width of the display panel can be widened.

(Patent Document 1) KR 10-2013-0044502 A

In this embodiment, a lens driving device capable of performing an auto focus function and simultaneously moving (shifting) an optical axis of a lens module from the center to reduce a bezel size of an optical device, and a camera module including the lens driving device And, it is intended to provide an optical device including the camera module.

The lens driving device of this embodiment includes a cover; a housing disposed inside the cover; a bobbin disposed inside the housing and having holes formed in a vertical direction; a coil disposed on an outer circumferential surface of the bobbin; It is disposed on the housing and includes a magnet disposed to correspond to the coil, and the cover includes a first side plate, a second side plate connected to the first side plate, and a second side plate disposed opposite to the first side plate. A third side plate connected to and a fourth side plate connected to the third side plate and the first side plate, wherein the housing includes a first side part disposed at a position corresponding to the first side plate of the cover, and A second side part disposed at a position corresponding to the second side plate and a third side part disposed at a position corresponding to the fourth side plate of the cover, and disposed at a position corresponding to the third side plate of the cover The outer surface of the coil is opposite to the inner surface of the third side plate of the cover, and the shortest distance between the vertical central axis of the bobbin hole and the first side plate of the cover is the vertical central axis of the bobbin hole and It may be longer than the shortest distance between the third side plates of the cover.

The shortest distance between the vertical central axis of the hole of the bobbin and the second side plate of the cover is equal to the shortest distance between the vertical central axis of the bobbin hole and the fourth side plate of the cover, and the vertical direction of the bobbin hole The shortest distance between the central axis and the second side plate of the cover is shorter than the shortest distance between the vertical central axis of the bobbin hole and the first side plate of the cover, and the vertical central axis of the bobbin hole and the cover The shortest distance between the second side plates may be greater than the shortest distance between the vertical central axis of the hole of the bobbin and the third side plate of the cover.

The housing may not be disposed between the bobbin and the third side plate of the cover in a horizontal direction.

The cover includes a 1-1 corner portion disposed between the first side plate and the second side plate, a 1-2 corner portion disposed between the second side plate and the third side plate, and a 1-2 corner portion disposed between the third side plate and the third side plate. A 1-3 corner portion disposed between four side plates and a 1-4 corner portion disposed between the fourth side plate and the first side plate, wherein the housing corresponds to the 1-1 corner portion of the cover. 2-1 corner part disposed at a position corresponding to the 1-2 corner part of the cover, 2-2 corner part disposed at a position corresponding to the 1-2 corner part of the cover, and a position corresponding to the 1-3 corner part of the cover A 2-3 corner portion disposed on a 2-3 corner portion and a 2-4 corner portion disposed at a position corresponding to the 1-4 corner portion of the cover, wherein the housing includes the 2-2 corner portion and the second corner portion. A rib connecting the -3 corner parts may be further included.

The rib may connect a lower portion of the 2-2nd corner portion and a lower portion of the 2-3rd corner portion.

The rib connects a first rib portion disposed between the 2-2 corner portion and the 2-3 corner portion, and an outer surface of the 2-2 corner portion and an outer surface of the 2-3 corner portion A second rib part may be included, and the second rib part may be longer than the first rib part.

The first rib part and the second rib part may be integrally formed.

The first rib part and the second rib part may protrude downward from the housing.

The magnet may include a first magnet disposed on the second side and a second magnet disposed on the third side.

The cover may further include a top plate having a rectangular shape and having holes formed in a vertical direction, and the top plate may be connected to the first side plate, the second side plate, the third side plate, and the fourth side plate. .

A difference between the shortest distance between the vertical central axis of the bobbin hole and the first side plate and the shortest distance between the vertical central axis of the bobbin hole and the third side plate may be 0.15 mm or more and 0.8 mm or less.

The camera module of this embodiment includes a lens driving device; a lens module disposed in the lens driving device; a substrate disposed below the lens driving device; It is mounted on the substrate and includes an image sensor disposed on an optical axis of the lens module, and the lens driving device includes: a cover; a housing disposed inside the cover; a bobbin disposed inside the housing and having holes formed in a vertical direction; a coil disposed on an outer circumferential surface of the bobbin; It is disposed on the housing and includes a magnet disposed to correspond to the coil, and the cover includes a first side plate, a second side plate connected to the first side plate, and a second side plate disposed opposite to the first side plate. A third side plate connected to and a fourth side plate connected to the third side plate and the first side plate, wherein the housing includes a first side part disposed at a position corresponding to the first side plate of the cover, and A second side part disposed at a position corresponding to the second side plate and a third side part disposed at a position corresponding to the fourth side plate of the cover, and disposed at a position corresponding to the third side plate of the cover The outer surface of the coil is opposite to the inner surface of the third side plate of the cover, and the shortest distance between the vertical central axis of the bobbin hole and the first side plate of the cover is the vertical central axis of the bobbin hole and It may be longer than the shortest distance between the third side plates of the cover.

In the lens driving device of the present embodiment, the central axis of the hole of the bobbin is moved (shifted) in a horizontal direction from the center of the cover, which is an exterior member. Therefore, the optical axis of the lens module mounted in the hole of the bobbin is also moved (shifted) in the horizontal direction and disposed. As a result, the display panel can be widened by reducing the size of the bezel of the optical device.

1 is a conceptual diagram illustrating a method for reducing a bezel size of an optical device.
2 is a perspective view showing the lens driving device of this embodiment.
3 is an exploded perspective view showing the lens driving device of this embodiment.
4 is a cross-sectional view of the lens driving device of the present embodiment taken along the line a-a'.
5 is a cross-sectional view of the lens driving device of the present embodiment taken along the line b-b'.
6 is a perspective view showing a cover of the lens driving device of this embodiment.
7 is a perspective view showing a housing of the lens driving device of this embodiment.
Fig. 8 is a perspective view showing a housing of the lens driving device of this modified example.
9 is a perspective view showing a bobbin, a first elastic member, and a second elastic member of the lens driving device according to this embodiment.
Fig. 10 is a perspective view showing the base of the lens driving device of this embodiment.
11 shows the distance between the "optical axis" and the first side plate, the distance between the "optical axis" and the second side plate, the distance between the "optical axis" and the third side plate, and the "optical axis" and the fourth side plate of the lens driving device of this embodiment. It is a plan view that conceptually shows the distance between them.

Hereinafter, some embodiments of the present invention will be described through exemplary drawings. In describing the reference numerals for the components of each drawing, the same numerals indicate the same components as much as possible, even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, the element may be directly connected, coupled, or connected to the other element, but not between the element and the other element. It should be understood that another component may be “connected”, “coupled” or “connected” between elements.

An “optical axis” used hereinbelow is defined as an optical axis of a lens module coupled to a lens driving device. Meanwhile, the optical axis direction may be used interchangeably with a vertical direction and a vertical direction. Also, the "optical axis" may coincide with the "central axis of the hole in the cover in the vertical direction" or may coincide with the "central axis in the vertical direction of the hole in the bobbin".

The "auto focus function" used below refers to focusing on a subject by adjusting the distance to the image sensor by moving the lens module in the optical axis direction according to the distance of the subject so that a clear image of the subject can be obtained from the image sensor. defined as a function. Meanwhile, “auto focus” may be used interchangeably with “auto focus (AF)”.

Hereinafter, the configuration of the "optical device" according to the present embodiment will be described. The optical device according to the present embodiment includes a mobile phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), and a portable multimedia player (PMP). ), navigation, etc., but is not limited thereto, and any device for capturing images or photos is possible.

The optical device according to the present embodiment includes a frame as an exterior member, a display unit (display panel) disposed on one surface of the frame to display information, and a cover glass disposed on one surface of the frame and spaced apart from the display unit (display panel). , a camera module disposed inside the frame and having a field of view (FOV) overlapping at least a portion of the cover glass. The camera module captures images or photos and may be electrically connected to a display unit (display panel). Images photographed by the camera module may be reproduced on the display unit.

Hereinafter, the configuration of the "camera module" according to the present embodiment will be described. The camera module of this embodiment may include a lens driving device 1000, a lens module, an infrared cut filter (not shown), a substrate (not shown), an image sensor (not shown), and a controller (not shown). The lens driving device 1000 will be described in detail below, and the remaining components will be described first.

A lens module may include a lens and a lens barrel. The lens module may include one or more lenses (not shown) and a lens barrel accommodating the one or more lenses. However, one configuration of the lens module is not limited to the lens barrel, and any holder structure capable of supporting one or more lenses may be used. The lens module may be coupled to the lens driving device 1000 and move together with the lens driving device 1000 . The lens module may be coupled to the inside of the lens driving device 1000 as an example. The lens module may be screw-coupled with the lens driving device 1000 as an example. As an example, the lens module may be coupled to the lens driving device 1000 by an adhesive (not shown). Light passing through the lens module may be irradiated onto the image sensor.

The infrared cut filter may block light in the infrared region from being incident on the image sensor. An infrared cut filter may be positioned between the lens module and the image sensor as an example. The infrared cut filter may be located on a holder member (not shown) provided separately from the base 800 . However, the infrared filter may be mounted in a hole formed in the center of the base 800. As an example, the infrared filter may be formed of a film material or a glass material. As an example, the infrared filter may be formed by coating an infrared blocking coating material on a flat optical filter such as a cover glass for protecting an imaging surface or a cover glass.

The substrate may be a printed circuit board (PCB). The substrate may support the lens driving device 1000 . An image sensor may be mounted on the substrate. As an example, an image sensor may be located inside the upper surface of the substrate, and a sensor holder (not shown) may be located outside the upper surface of the substrate. A lens driving device 1000 may be positioned above the sensor holder. Alternatively, the lens driving device 1000 may be located outside the upper surface of the substrate and the image sensor may be located inside the upper surface of the substrate. Through this structure, light passing through the lens module accommodated inside the lens driving device 1000 may be irradiated to the image sensor mounted on the substrate. The substrate may supply power to the lens driving device 1000 . Meanwhile, a control unit for controlling the lens driving device 1000 may be positioned on the substrate.

The image sensor may be mounted on a substrate. The image sensor may be positioned such that an optical axis coincides with the lens module. Through this, the image sensor may obtain light passing through the lens module. The image sensor may output irradiated light as an image. An image output from the image sensor may be transmitted to a display unit (display panel) of an optical device through a substrate. The image sensor may be, for example, a charge coupled device (CCD), a metal oxide semi-conductor (MOS), a CPD, and a CID. However, the type of image sensor is not limited thereto.

The controller may be mounted on a board. The control unit may be located outside the lens driving device 1000 . However, the control unit may be located inside the lens driving device 1000 . The control unit may control the direction, strength, and amplitude of the current supplied to each element constituting the lens driving apparatus 1000 . The controller may control the lens driving device 1000 to perform an auto focus function of the camera module. That is, the controller may control the lens driving device 1000 to move the lens module in the optical axis direction.

Hereinafter, the "lens driving device 1000" of this embodiment will be described with reference to the drawings. 2 is a perspective view showing the lens driving device of this embodiment, FIG. 3 is an exploded perspective view showing the lens driving device of this embodiment, and FIG. 4 is a cross-sectional view of the lens driving device of this embodiment cut along the line a-a'. 5 is a cross-sectional view of the lens driving device of this embodiment taken along line b-b', FIG. 6 is a perspective view showing a cover of the lens driving device of this embodiment, and FIG. 7 is a lens driving device of this embodiment. Fig. 8 is a perspective view showing the housing of the lens driving device of this modified example, and Fig. 9 is a perspective view showing the bobbin, upper elastic member, and lower elastic member of the lens driving device of this embodiment, 10 is a perspective view showing the base of the lens driving device according to this embodiment, and FIG. 11 is the distance between the "optical axis" and the first side plate, the distance between the "optical axis" and the second side plate, and the "optical axis" of the lens driving device according to this embodiment. It is a plan view conceptually showing the distance between the "optical axis" and the third side plate and the distance between the "optical axis" and the fourth side plate.

In a general lens driving device, a bobbin is disposed at the center of a cover. Unlike this, in the lens driving device 1000 of the present embodiment, the technical feature is that the bobbin 400 is moved (shifted) to one side in the horizontal direction with respect to the cover 100 and disposed. The cover 100 is an exterior member, whereby the size of the lens driving device 1000 and the camera module is determined.

In the lens driving device 1000 of this embodiment, the size of the cover 100 is maintained, but the bobbin 400 on which the lens module is mounted is moved to one side in the horizontal direction, so that the "optical axis" is moved to one side in the horizontal direction and disposed. It can be.

Therefore, the lens driving device 1000 and the camera module of this embodiment can move the cover glass to the edge of the frame of the optical device when mounted on the optical device, compared to a general lens driving device and camera module having the same size. As a result, the size of the bezel of the optical device can be reduced and the display panel can be relatively widened.

The lens driving device 1000 of this embodiment includes a cover 100, a housing 200, a first driving unit 300, a bobbin 400, a second driving unit 500, a first elastic member 600, and a second elastic member. A member 700 and a base 800 may be included. The first driving unit 300 may be a “magnet” or a “coil” according to electromagnetic design conditions. The second driving unit 500 may be a “magnet” or a “coil” according to electromagnetic design conditions. If the first driving unit 300 is a "magnet", the second driving unit 500 may be a "coil". If the first driving unit 300 is a "coil", the second driving unit 500 may be a "magnet". Therefore, although there are two cases, a case in which the first driving unit 300 is a "magnet 300" and the second driving unit 500 is a "coil 500" will be described. In other cases, a case in which the first driving unit 300 is a “magnet 300” and the second driving unit 500 is a “coil 500” may be inferred.

The cover 100 may be an exterior member of the lens driving device 1000 . Sizes of the lens driving device 1000 and the camera module may be determined by the cover 100 .

A housing 200, a magnet 300, a bobbin 400, a coil 500, an upper elastic member 600, and a lower elastic member 700 may be disposed inside the cover 100. A base 800 may be disposed below the cover 100 .

The cover 100 may include a metal material. The cover 100 may block electromagnetic waves from being introduced from the outside to the inside or from being discharged from the inside to the outside. Accordingly, the cover 100 may be referred to as a "shielded can". However, the material of the cover 100 is not limited thereto. For example, the cover 100 may include a plastic material.

The cover 100 includes a top plate 110, a first side plate 120, a second side plate 130, a third side plate 140, a fourth side plate 150, a first corner portion C1-1, and a second side plate 130. A corner portion C1-2, a third corner portion C1-3, and a fourth corner portion C1-4 may be included.

Top plate 110, first side plate 120, second side plate 130, third side plate 140, fourth side plate 150, first corner part C1-1, second corner part C1- 2), the third corner portion C1-3 and the fourth corner portion C1-4 may be integrally formed.

The top plate 110 may be in the form of a square plate with rounded corners. Holes 111 may be formed in the top plate 110 in a vertical direction. The hole 111 of the cover 100 may be positioned by moving a vertical central axis from the center of the top plate 110 to a direction where the third side plate 140 is located.

The light reflected on the subject may be irradiated to the lens module mounted on the bobbin 400 through the hole 111 of the cover 100 . To this end, the "central axis in the vertical direction of the hole 111 of the cover 100", the "central axis in the vertical direction of the hole 410 in the bobbin 400", and the "optical axis of the lens module" may coincide with each other.

In the lens driving device 1000 of this embodiment, since the bobbin 400 is moved from the center of the top plate 110 to the direction in which the third side plate 140 is located, the hole 111 of the cover 100 is also formed in the third side plate 140. It is moved in the direction where the side plate 140 is located.

The top plate 110 may include a first side (S1), a second side (S2), a third side (S3) and a fourth side (S4). In the first side (S1), the first side plate 120 is bent or curved and disposed, and in the second side (S2), the second side plate 130 is bent or curved and disposed, and the third side ( In S3 , the third side plate 140 may be bent or curved and disposed, and in the fourth side S4 , the fourth side plate 150 may be bent or bent downward. That is, the first side plate 120 , the second side plate 130 , the third side plate 140 , and the fourth side plate 150 may be disposed bent or curved downward at the edge of the top plate 110 . Also, side portions of the cover 100 may be formed by the first side plate 120 , the second side plate 130 , the third side plate 140 and the fourth side plate 150 .

The first side plate 120, the second side plate 130, the third side plate 140, and the fourth side plate 150 may have a substantially rectangular plate shape. The first side plate 120 and the third side plate 140 face each other and may be disposed in parallel. The second side plate 130 and the fourth side plate 150 face each other and may be disposed in parallel. The second side plate 130 and the fourth side plate 150 may be disposed between the first side plate 120 and the third side plate 140, and vice versa. Each of the first side plate 120 and the third side plate 140 may be disposed vertically with each of the second side plate 130 and the fourth side plate 150 .

The first side plate 120 and the second side plate 130 may be connected. The third side plate 140 may be disposed on the opposite side of the first side plate 120 . The third side plate 140 may be connected to the second side plate 130 . The fourth side plate 150 may be disposed on the opposite side of the second side plate 130 . The fourth side plate 150 may be connected to the third side plate 140 and may be connected to the first side plate 120 .

The first side plate 120 and the second side plate 130 may be connected by the 1-1 corner portion C1-1. The 1-1 corner portion C1-1 may be positioned between the first side plate 120 and the second side plate 130. The 1-1 corner portion C1-1 may be located at a corner formed by the first side plate 120 and the second side plate 130.

The second side plate 130 and the third side plate 140 may be connected by the 1-2 corner portion C1-2. The first-second corner portion C1-2 may be positioned between the second side plate 130 and the third side plate 140. The first-second corner portion C1-2 may be positioned at a corner formed by the second side plate 130 and the third side plate 140.

The third side plate 130 and the fourth side plate 140 may be connected by the 1-3 corner portion C1-3. The 1-3 corner portion C1-3 may be positioned between the third side plate 140 and the fourth side plate 150. The first-third corner portion C1-3 may be positioned at a corner formed by the third side plate 140 and the fourth side plate 150.

The fourth side plate 150 and the first side plate 120 may be connected by the 1-4 corner portions C1-4. The 1-4 corner portion C1-4 may be positioned between the fourth side plate 150 and the first side plate 120. The 1-4 corner portion C1-4 may be positioned at a corner formed by the fourth side plate 150 and the first side plate 120.

A first groove 131 in which the first terminal 712-1 and the second terminal 722-2 of the lower elastic member 700 are disposed may be formed at a lower end of the second side plate 130. The first groove 131 may have a shape dug upward from the lower surface of the second side plate 130, and through this, the first terminal 712-1 and the second terminal 722-2 may be exposed to the outside. .

A second groove 141 in which the rib 240 of the housing 200 is disposed may be formed at a lower end of the third side plate 140 . The second groove 141 may have a shape dug upward from the lower surface of the third side plate 140, and through this, the rib 240 may be exposed to the outside.

In FIG. 6 , the first corner portion C1-1, the second corner portion C1-2, the third corner portion C1-3, and the fourth corner portion C1-4 are shown in a rounded shape. However, the shapes of the first corner portion C1-1, the second corner portion C1-2, the third corner portion C1-3, and the fourth corner portion C1-4 are not limited thereto. The first corner part C1 - 1 , the second corner part C1 - 2 , the third corner part C1 - 3 , and the fourth corner part C1 - 4 may have angular shapes.

Furthermore, in this modification (not shown), the cover 100 may have a cylindrical shape, and in this case, the first corner part C1-1, the second corner part C1-2, and the third corner part C1 -3) and the fourth corner portion C1-4 may be four specific points spaced apart in the circumferential direction, and the first side plate 120, the second side plate 130, the third side plate 140 and the fourth The side plate 150 is four disposed between the first corner portion C1-1, the second corner portion C1-2, the third corner portion C1-3, and the fourth corner portion C1-4, respectively. It can be the side plate of a dog.

The housing 200 may be disposed inside the cover 100 . The housing 200 may be disposed inside the cover 100 . A bobbin 400 may be disposed inside the housing 200 . A base 800 may be disposed below the housing 200 . A magnet 300 may be disposed in the housing 200 . An upper elastic member 600 may be disposed on the housing 200 . An upper elastic member 600 may be disposed between the housing 200 and the top plate 110 of the cover 100 . A lower elastic member 700 may be disposed below the housing 200 . A lower elastic member 700 may be disposed between the housing 200 and the base 800 . The housing 200 may be a plastic injection molding.

The housing 200 includes a first side portion 210, a second side portion 220, a third side portion 230, a rib 240, a 2-1 corner portion C2-1, and a 2-2 corner portion ( C2-2), the 2-3 corner portion C2-3, and the 2-4 corner portion C2-4.

The first side portion 210 may be spaced apart from the first side plate 120 in a direction in which the “up-and-down central axis of the hole 410 of the bobbin 400 (the optical axis of the lens module and the central axis of the up-and-down direction of the hole of the cover)” is located. can The first side portion 210 may be disposed to face the first side plate 120 .

The second side portion 220 may be spaced apart from the second side plate 130 in a direction in which the "up-and-down central axis of the hole 410 of the bobbin 400 (the optical axis of the lens module and the central axis of the up-and-down direction of the hole of the cover)" is located. can The second side portion 220 may be disposed to face the second side plate 130 . A first magnet 310 may be disposed on the second side part 220 . A first magnet accommodating part 221 in the form of a hole may be formed in the second side part 220 . The first magnet 310 may be accommodated in the first magnet accommodating part 221 .

The third side portion 230 may be spaced apart from the fourth side plate 140 in a direction in which the "up-and-down central axis of the hole 410 of the bobbin 400 (the optical axis of the lens module and the central axis of the up-and-down direction of the hole of the cover)" is located. can The third side portion 230 may be disposed to face the fourth side plate 150 . A hole-shaped second magnet accommodating portion 231 may be disposed on the third side portion 230 . The second magnet 320 may be accommodated in the second magnet accommodating part 231 .

The second side part 220 and the third side part 230 may face each other and be disposed in parallel. Therefore, the first magnet 310 and the second magnet 320 face each other and may be disposed in parallel.

The 2-1st corner part C2-1 may be disposed closest to the 1-1st corner part C1-1 among the four corner parts of the cover 100. The 2-2 corner part C2-2 may be disposed closest to the 1-2 corner part C1-2 among the four corner parts of the cover 100. The 2-3 corner part C2-3 may be disposed closest to the 1-3 corner part C1-3 among the four corner parts of the cover 100. The second-fourth corner portion C2-4 may be disposed closest to the first-fourth corner portion C1-4 among the four corner portions of the cover 100.

That is, the 2-1st corner part C2-1 may be disposed at a position corresponding to (facing, facing) the 1-1st corner part C1-1. The 2-2 corner part C2-2 may be disposed at a position corresponding to (facing, facing) the 1-2 corner part C1-2. The 2-3 corner part C2-3 may be disposed at a position corresponding to (facing, facing) the 1-3 corner part C1-3. The second-fourth corner portion C2-4 may be disposed at a position corresponding to (facing, facing) the first-fourth corner portion C1-4.

The first side part 210 may connect the 2-1 corner part C2-1 and the 2-4 corner part C2-4. That is, the first side portion 210 may be disposed between the 2-1 corner portion C2-1 and the 2-4 corner portion C2-4. The second side part 220 may connect the 2-1 corner part C2-1 and the 2-2 corner part C2-2. That is, the second side part 220 may be disposed between the 2-1 corner part C2-1 and the 2-2 corner part C2-2. The third side part 230 may connect the 2-3 corner part C2-3 and the 2-4 corner part C2-4. That is, the third side portion 230 may be disposed between the second-third corner portion C2-3 and the second-fourth corner portion C2-4.

The 2-2 corner part C2-2 and the 2-3 corner part C2-3 may be spaced apart from each other. A hollow space may be formed between the 2-2 corner portion C2-2 and the 2-3 corner portion C2-3.

According to the foregoing, in the lens driving device 1000 of this embodiment, a side portion corresponding to the third side plate 140 of the cover 100 does not exist in the housing 200 . Instead, there is only a hollow space between the 2-2 corner portion C2-2 and the 2-3 corner portion C2-3. As a result, the bobbin 200 may be disposed by moving in the direction in which the third side plate 140 is disposed. That is, at least a portion of the bobbin 400 and/or at least a portion of the coil 500 are disposed in the hollow space between the 2-2 corner portion C2-2 and the 2-3 corner portion C2-3. It can be.

However, due to the lack of side parts, the housing 200 has low durability and may be warped by an external force. The rib 240 is a member for reinforcing the housing 200 and may connect the 2-2 corner portion C2-2 and the 2-3 corner portion C2-3. However, the rib 240 is formed on the upper part of the 2-2 corner part C2-2 and the 2-3 corner part C2-3 in order to provide an accommodation space for the bobbin 400 and/or the coil 500. ), or the lower part of the 2-2 corner part C2-2 and the lower part of the 2-3 corner part C2-3 may be connected. In this embodiment, a case in which the rib 240 connects the lower portion of the 2-2 corner portion C2-2 and the lower portion of the 2-3 corner portion C2-3 will be described as an example. In this case, at least a portion of the bobbin 400 and/or at least a portion of the coil 500 may be positioned above the rib 240 .

The rib 240 may include a first rib part 241 and a second rib part 242 . The first rib part 241 may be disposed between the 2-2 corner part C2-2 and the 2-3 corner part C2-3. The second rib part 242 may connect the outer surface of the 2-2 corner part C2-2 and the outer surface of the 2-3 corner part C2-3. That is, the first rib part 241 may be disposed closer to the "central axis of the bobbin 400 in the vertical direction" than the second rib part 242 . The second rib part 242 may be longer than the first rib part 241 in one direction based on the 2-2 corner part C2-2 and the 2-3 corner part C2-3. That is, the first rib part 241 and the second rib part 242 may form a step difference. Also, the first rib part 241 and the second rib part 242 may protrude downward from the housing 200 . The horizontal thickness of the first rib part 241 and the second rib part 242 may be 0.2 mm or more.

In a modified example of this embodiment (see FIG. 8 ), the rib 240 may connect the upper portion of the 2-2 corner portion C2-2 and the upper portion of the 2-3 corner portion C2-3. In this case, the first rib part 1241 may be disposed between the 2-2 corner part C2-2 and the 2-3 corner part C2-3. The second rib part 1242 may connect the outer surface of the 2-2 corner part C2-2 and the outer surface of the 2-3 corner part C2-3. That is, the first rib part 1241 may be disposed closer to the “central axis of the bobbin 400 in the vertical direction” than the second rib part 1242 . The second rib part 1242 may be longer than the first rib part 1241 in one direction based on the 2-2 corner part C2-2 and the 2-3 corner part C2-3. That is, the first rib part 1241 and the second rib part 1242 may form a step difference. Also, the first rib part 1241 and the second rib part 1242 may protrude upward from the housing 200 . The horizontal thickness of the first rib part 1241 and the second rib part 1242 may be 0.2 mm or more.

The magnet 300 may be disposed on the housing 200 . The magnet 300 may face the coil 500 . The magnet 300 may provide driving force to the bobbin 400 by electromagnetically interacting with the coil 500 . The magnet 300 may include a first magnet 310 and a second magnet 320 . The first magnet 310 and the second magnet 320 may be “permanent magnets”. The first magnet 310 may be disposed in the first magnet accommodating part 221 formed in the shape of a hole in the second side part 220 . The second magnet 320 may be disposed in the second magnet accommodating part 231 formed in the shape of a hole in the third side part 230 .

The bobbin 400 may be disposed inside the housing 200 . The bobbin 400 may be disposed inside the housing 200 . A lens module of a camera module may be disposed on the bobbin 400 . Holes 410 may be formed in the bobbin 400 in a vertical direction. The lens module may be accommodated and disposed in the hole 410 of the bobbin 400 . The "central axis of the hole 410 of the bobbin 400 in the vertical direction" may coincide with the "optical axis of the lens module". Also, the "central axis in the vertical direction of the hole 410 of the bobbin 400" may coincide with the "central axis in the vertical direction of the hole 111 in the cover 100". The diameter of the hole 410 of the bobbin 400 may be smaller than the diameter of the hole 111 of the cover 100 . Accordingly, the lens module may be completely exposed through the hole 111 of the cover 100 .

In the lens driving device 1000 of this embodiment, the bobbin 400 is horizontally moved (shifted) in the direction in which the third side plate 140 of the cover 100 is positioned. Accordingly, the first side plate 120, the second side plate 130, the third side plate 140 and the fourth side plate ( 150) makes a difference in the shortest distance. Hereinafter, this will be described with reference to FIG. 11 .

The shortest distance L1 between the "central axis in the vertical direction of the hole 410 of the bobbin 400" and the first side plate 120 is the "central axis in the vertical direction of the hole 410 in the bobbin 400" and the third It may be longer than the shortest distance L3 between the side plates 140 .

The shortest distance L2 between the “central axis in the vertical direction of the hole 410 of the bobbin 400” and the second side plate 130 is the “central axis in the vertical direction of the hole 410 in the bobbin 400” and the fourth It may be the same as the shortest distance (L4) between the side plates 150.

The shortest distance (L2) between "the vertical central axis of the hole 410 of the bobbin 400" and the second side plate 130 is the "vertical central axis of the hole 410 of the bobbin 400" and the first It may be shorter than the shortest distance L1 between the side plates 120 .

The shortest distance (L2) between the "central axis in the vertical direction of the hole 410 of the bobbin 400" and the second side plate 130 is the "central axis in the vertical direction of the hole 410 in the bobbin 400" and the third It may be longer than the shortest distance L3 between the side plates 140 .

Since the “upper and lower central axis of the hole 410 of the bobbin 400” coincides with the “optical axis of the lens module”, the above-described “upper and lower central axis of the hole 410 of the bobbin 400” and the first side plate ( 120), the distance relationship between the second side plate 130, the third side plate 140 and the fourth side plate 150 is the "optical axis of the lens module" and the first side plate 120, the second side plate 130, The same may be applied between the third side plate 140 and the fourth side plate 150 .

The shortest distance between “the vertical central axis of the hole 410 of the bobbin 400” and the first side plate 120, “the vertical central axis of the hole 410 of the bobbin 400” and the third side plate 140 The difference in the shortest distance between the two may be 0.5 mm or more and 1.0 mm or less. The shortest distance between “the vertical central axis of the hole 410 of the bobbin 400” and the first side plate 120, “the vertical central axis of the hole 410 of the bobbin 400” and the third side plate 140 The difference in the shortest distance between them may be 0.15 mm or more and 0.8 mm or less.

Below the minimum value of the above-mentioned numerical range, the effect of reducing the bezel size in the optical device (smartphone) is insignificant, and when it exceeds the maximum value, the bobbin 400 is tilted due to the biased arrangement, thereby designing the optical design and structure. undesirable from the point of view

The bobbin 400 and the lens module are coupled so that when the bobbin 400 moves, the lens module can move integrally with the bobbin 400 . The bobbin 400 may move in the optical axis direction (up and down direction) by electromagnetic interaction between the magnet 300 and the coil 500 . The lens module may move integrally with the bobbin 400 in an optical axis direction (up and down direction) to perform an auto focus function.

An upper elastic member 600 may be disposed on the bobbin 400 . A lower elastic member 700 may be disposed below the bobbin 400 . The bobbin 400 may be elastically supported by the housing 200 in a vertical direction (optical axis direction) by the upper elastic member 600 and the lower elastic member 700 . A coil 500 may be disposed on an outer circumferential surface of the bobbin 400 .

The coil 500 may be disposed on an outer circumferential surface of the bobbin 400 . The coil 500 may be wound on the outer circumferential surface of the bobbin 400 . Coil 500 may be in the form of a “coil block”. Coil 500 may be an "electromagnet". The coil 500 may provide driving force to the bobbin 400 by electromagnetically interacting with the magnet 300 . Both ends of the coil 500 may be pulled out and connected to the lower elastic member 700 . The coil 500 may be electrically connected to the lower elastic member 700 . The lower elastic member 700 may receive power from the substrate through the first terminal 712-1 and the second terminal 722-2. The coil 500 may generate electromagnetic force by receiving power from the lower elastic member 700 .

As the bobbin 400 moves horizontally in the direction in which the third side plate 140 is located and the housing 200 lacks a side plate corresponding to the third side plate 140, the coil 500 moves along the third side plate 140. It may have a side directly opposite to the That is, the outer surface (outer part) of the coil 500 disposed at a position corresponding to the third side plate 140 may directly face the inner surface (inner part) of the third side plate 140 .

The upper elastic member 600 may be a plate spring. The upper elastic member 600 may be made of metal. The upper elastic member 600 may be non-magnetic. Accordingly, the upper elastic member 600 may not be affected by the magnetic force of the magnet 300 and the electromagnetic force of the coil 500 .

The upper elastic member 600 may be disposed above the housing 200 . The upper elastic member 600 may be disposed above the bobbin 400 . The upper elastic member 600 may be disposed between the housing 200 and the upper plate 110 of the cover 100 . The upper elastic member 600 may be disposed between the bobbin 400 and the upper plate 110 of the cover 100 . The upper elastic member 600 may be coupled to the housing 200 and the bobbin 400 . The upper elastic member 600 may elastically connect between the housing 200 and the bobbin 400 .

The upper elastic member 600 includes a first upper elastic member 610, a second upper elastic member 620, a third upper elastic member 630, a fourth upper elastic member 640, and a fifth upper elastic member 650. ), the sixth upper elastic member 660, the seventh upper elastic member 670, and the eighth upper elastic member 680 may be included.

The first upper elastic member 610 , the second upper elastic member 620 , and the third upper elastic member 630 may be disposed on the housing 200 and coupled to the housing 200 . The fourth upper elastic member 640 may be disposed on the bobbin 400 and coupled with the bobbin 400 . The fifth upper elastic member 650, the sixth upper elastic member 660, the seventh upper elastic member 670, and the eighth upper elastic member 680 are the first upper elastic member 610 and the second upper elastic member. 620 and the third upper elastic member 630 and the fourth upper elastic member 640 may be elastically connected. Accordingly, the bobbin 400 may be elastically supported by the housing 200 in the vertical direction.

The first upper elastic member 610 may be positioned to correspond to the first side portion 210 of the housing 200 in the vertical direction. The second upper elastic member 620 may be positioned to correspond with the second side portion 220 of the housing 200 in the vertical direction. The third upper elastic member 630 may be positioned to correspond to the third side portion 230 of the housing 200 in the vertical direction. Similarly to the lack of a portion corresponding to the third side plate 140 of the cover 100 in the housing 200, the upper elastic member 600 is also disposed in the direction of the third side plate 140 of the cover 100. and a portion connecting the second upper elastic member 620 and the third upper elastic member 630 is missing. This is to secure a moving space of the bobbin 200.

The lower elastic member 700 may be a plate spring. The lower elastic member 700 may be metal. The lower elastic member 700 may be non-magnetic. Accordingly, the lower elastic member 700 may not be affected by the magnetic force of the magnet 300 and the electromagnetic force of the coil 500 . The lower elastic member 700 may be electrically connected to the coil 500 . The lower elastic member 700 may be electrically connected to the substrate. The lower elastic member 700 may electrically connect the coil 500 and the substrate.

The lower elastic member 700 may be disposed below the housing 200 . The lower elastic member 700 may be disposed below the bobbin 400 . The lower elastic member 700 may be disposed between the housing 200 and the base 800 . The lower elastic member 700 may be disposed between the bobbin 400 and the base 800 . The lower elastic member 700 may be coupled to the housing 200 and the bobbin 400 . The lower elastic member 700 may elastically connect between the housing 200 and the bobbin 400 .

The lower elastic member 700 may include a first lower elastic member 710 and a second lower elastic member 720 spaced apart from each other. A first terminal 712-1 may be disposed on the first lower elastic member 710, and a second terminal 722-1 may be disposed on the second lower elastic member 720. The first terminal 712-1 and the second terminal 722-1 may be electrically connected to the main board of the camera module. In addition, the first lower elastic member 710 may be electrically connected to one lead wire of the coil 500, and the second lower elastic member 710 may be electrically connected to the other lead wire of the coil 500. Accordingly, power may be applied to the coil 500 through the lower elastic member 700 on the main substrate.

The base 800 may be disposed below the cover 100 . The base 800 may be disposed below the housing 200 . The base 800 may be disposed below the bobbin 400 . An adhesive may be applied between the base 800 and the cover 100 . An adhesive may be applied between the base 800 and the housing 200 . The base 800 may be approximately in the form of a rectangular plate having a thickness.

A hole 811 may be formed in the center of the base 800 . External light may be radiated to the image sensor through the hole of the base 800 .

The base 800 includes a first stopper 812, a second stopper 813, a third stopper 814 and a fourth stopper (812), a second stopper 813, a third stopper 814, and a fourth stopper ( 815) may be located. The first stopper 812 , the second stopper 813 , the third stopper 814 , and the fourth stopper 815 may protrude upward from the upper surface of the base 800 .

A terminal accommodating groove 816 dug inward may be located on the side of the base 800 . A first terminal 712-1 and a second terminal 722-1 may be disposed in the terminal receiving groove 816.

A raised portion 821 raised upward may be located at the edge of the base 800 . The raised portion 821 may include a first raised portion 821 , a second raised portion 822 , and a third raised portion 833 . The first raised portion 821 may be positioned to correspond to the first side plate 120 in the vertical direction. The second raised portion 822 may be positioned to correspond to the second side plate 130 in the vertical direction. The third raised portion 822 may be positioned to correspond to the fourth side plate 150 in the vertical direction. As a result, an edge corresponding to the third side plate 140 in the base 800 may form a lowered portion having a relatively low height. A rib 240 may be disposed at a lower portion of the base 800 .

In the above, even though all the components constituting the embodiment of the present invention have been described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the components may be selectively combined with one or more to operate. In addition, terms such as "comprise", "comprise" or "having" described above mean that the corresponding component may be present unless otherwise stated, and thus exclude other components. It should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (29)

Base;
a cover disposed on the base and including a top plate and a side plate extending from the top plate;
a bobbin disposed within the cover; and
A coil and a magnet disposed in the cover and moving the bobbin in an optical axis direction,
The bobbin includes a hole formed through which a lens is disposed,
The top plate of the cover includes a hole disposed at a position corresponding to the hole of the bobbin,
The side plates of the cover include a first side plate and a third side plate disposed opposite to each other, and a second side plate and a fourth side plate disposed opposite to each other,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the first side plate of the cover is greater than the shortest distance between the hole of the top plate of the cover and the third side plate of the cover. According to claim 1,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the second side plate of the cover is equal to the shortest distance between the hole of the top plate of the cover and the fourth side plate of the cover. According to claim 1,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the second side plate of the cover is shorter than the shortest distance between the hole of the top plate of the cover and the first side plate of the cover. According to claim 1,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the second side plate of the cover is longer than the shortest distance between the hole of the top plate of the cover and the third side plate of the cover. According to claim 1,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the fourth side plate of the cover is shorter than the shortest distance between the hole of the top plate of the cover and the first side plate of the cover. According to claim 1,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the first side plate of the cover is the shortest distance between the hole of the top plate of the cover and the second side plate of the cover and the shortest distance between the hole of the top plate of the cover and the top plate of the cover longer than the shortest distance between the hole of and the fourth side plate of the cover,
At least a portion of the coil is disposed at a position corresponding to the first side plate of the cover. According to claim 1,
A housing disposed between the bobbin and the cover;
The magnet is disposed on the outer circumferential surface of the bobbin,
The lens driving device wherein the coil is disposed in the housing. According to claim 1,
A housing disposed between the bobbin and the cover;
The coil is disposed on the outer circumferential surface of the bobbin,
The lens driving device wherein the magnet is disposed in the housing. According to claim 7 or 8,
The housing has a first side part disposed at a position corresponding to the first side plate of the cover, a second side part disposed at a position corresponding to the second side plate of the cover, and corresponding to the fourth side plate of the cover. Including a third side portion disposed at a position to be,
An outer surface of the coil disposed at a position corresponding to the third side plate of the cover faces an inner surface of the third side plate of the cover. According to claim 9,
The lens driving device of claim 1 , wherein the housing is not disposed between the bobbin and the third side plate of the cover in a horizontal direction. According to claim 9,
The housing includes a rib disposed between the bobbin and the third side plate of the cover,
The lens driving device of claim 1 , wherein the rib of the housing has a shape different from that of the first side portion of the housing and is smaller than the first side portion of the housing. According to claim 1,
The magnet includes a first magnet disposed between the bobbin and the second side plate of the cover, and a second magnet disposed between the bobbin and the fourth side plate of the cover. According to claim 1,
The shortest distance between the optical axis direction central axis of the hole of the bobbin and the first side plate of the cover is longer than the shortest distance between the optical axis direction central axis of the hole of the bobbin and the third side plate of the cover. According to claim 13,
A difference between the shortest distance between the central axis of the hole in the bobbin in the optical axis direction and the first side plate and the shortest distance between the central axis of the hole in the bobbin in the optical axis direction and the third side plate is 0.15 mm or more and 0.8 mm or less. Device. According to claim 1,
The shortest distance between the optical axis direction central axis of the hole of the bobbin and the second side plate of the cover is equal to the shortest distance between the optical axis direction central axis of the hole of the bobbin and the fourth side plate of the cover,
The shortest distance between the optical axis direction central axis of the hole of the bobbin and the second side plate of the cover is shorter than the shortest distance between the optical axis direction central axis of the hole of the bobbin and the first side plate of the cover,
The shortest distance between the optical axis direction central axis of the hole of the bobbin and the second side plate of the cover is longer than the shortest distance between the optical axis direction central axis of the hole of the bobbin and the third side plate of the cover. According to claim 1,
Includes a lower elastic member coupled to the lower surface of the bobbin,
The lower elastic member includes a first lower elastic member and a second lower elastic member spaced apart from each other and electrically connected to the coil,
When viewed from above, the total area of the first lower elastic member is larger than the total area of the second lower elastic member. According to claim 1,
The base includes a hole disposed at a position corresponding to the hole of the bobbin,
Longer than the shortest distance between the optical axis direction central axis of the hole of the base and the first side plate of the cover and the shortest distance between the optical axis direction central axis of the hole of the base and the third side plate of the cover. According to claim 1,
A lens driving device in which a magnet is not disposed between the bobbin and the third side plate of the cover. a cover including an upper plate and a side plate;
a bobbin disposed within the cover; and
A coil and a magnet disposed in the cover and moving the bobbin in an optical axis direction,
The bobbin includes a hole formed in the optical axis direction,
The top plate of the cover includes a hole disposed at a position corresponding to the hole of the bobbin,
The side plates of the cover include a first side plate and a third side plate disposed opposite to each other, and a second side plate and a fourth side plate disposed opposite to each other,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the first side plate of the cover is longer than the shortest distance between the hole of the top plate of the cover and the third side plate of the cover;
When viewed from above, the shortest distance between the hole of the top plate of the cover and the second side plate of the cover is equal to the shortest distance between the hole of the top plate of the cover and the fourth side plate of the cover. According to claim 19,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the second side plate of the cover is shorter than the shortest distance between the hole of the top plate of the cover and the first side plate of the cover. According to claim 19,
The shortest distance between the optical axis direction central axis of the hole of the bobbin and the first side plate of the cover is longer than the shortest distance between the optical axis direction central axis of the hole of the bobbin and the third side plate of the cover. Board;
an image sensor disposed on the substrate;
a lens driving device according to any one of claims 1 to 8 and 12 to 21 disposed on the substrate; and
A camera module including a lens coupled to the bobbin of the lens driving device. frame;
The camera module of claim 22 disposed in the frame; and
An optical device comprising a display unit disposed on the frame and outputting an image captured by the camera module. Base;
a cover disposed on the base and including a top plate and a side plate extending from the top plate;
a bobbin disposed within the cover; and
A driving coil and a driving magnet disposed within the cover and moving the bobbin;
The bobbin includes a hole formed in the optical axis direction,
The top plate of the cover includes a hole disposed at a position corresponding to the hole of the bobbin,
The side plates of the cover include a first side plate and a third side plate disposed opposite to each other, and a second side plate and a fourth side plate disposed opposite to each other,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the first side plate of the cover is the shortest distance between the hole of the top plate of the cover and any one of the second to fourth side plates of the cover. A lens drive unit that is longer than the distance. According to claim 24,
The driving magnet includes a magnet disposed between the bobbin and the second side plate of the cover. According to claim 24,
The driving magnet includes a magnet for moving the bobbin in an optical axis direction. The method of claim 24 or 26,
At least a portion of the coil is disposed at a position corresponding to the first side plate of the cover. The method of claim 24 or 26,
At least a portion of the coil is disposed between the first side plate of the cover and the bobbin. According to claim 24,
When viewed from above, the shortest distance between the hole of the top plate of the cover and the second side plate of the cover is longer than the shortest distance between the hole of the top plate of the cover and the third side plate of the cover.