KR102542557B1 - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

The embodiment relates to a lens driving device, which includes a base including a protrusion protruding from an upper surface, a bobbin disposed apart from the base, a magnet disposed on the protrusion, and a bobbin disposed on the bobbin by interaction with the magnet in the optical axis direction. The protruding part includes a first side wall and a second side wall, the base protrudes from the upper surface of the base and includes a step connecting the lower part of the first side wall and the lower part of the second side wall, and the magnet It includes a first surface coupled to the first sidewall, a second surface coupled to the second sidewall, and a third surface positioned between the first and second surfaces and coupled to the step.

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 distribution of various portable terminals 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 portable terminals.

Among them, a typical example is a camera module that takes a picture or video of a subject. Recently, a camera module having an auto focus function, which is a function of automatically adjusting a focus according to a distance to a subject, has appeared. For information related to the camera module, see Patent Publication No. 10-2015-0008662 (published on January 23, 2015) and US Patent Publication No. US 2011/0141564 (published on June 16, 2011) can do.

Meanwhile, the auto focus function may be performed by a lens driving device. A lens driving device requires various parts such as a support member, such as a cover, a housing, a bobbin, and a base. Meanwhile, in general, a magnet is disposed on a housing and a coil is disposed on a bobbin, so that an autofocus function may be performed by electromagnetic interaction between the magnet and the coil.

However, in a general lens driving device, the magnet is not stably fixed, and thus the autofocus function is not properly performed. In addition, there is a problem in that the assembly process is complicated because there are many components, and the optical axis is deviated due to tolerances between the components.

In this embodiment, it is intended to provide a lens driving device capable of stably fixing a magnet and reducing the number of component parts.

A lens driving device according to an embodiment includes a base including a protrusion protruding from an upper surface; a bobbin disposed spaced apart from the base; a magnet disposed on the protrusion; and a coil disposed on the bobbin and moving the bobbin in an optical axis direction by interaction with the magnet, wherein the protrusion part includes a first sidewall and a second sidewall, and the base extends from the upper surface of the base. It protrudes and includes a step connecting a lower portion of the first sidewall and a lower portion of the second sidewall, and the magnet has a first surface coupled to the first sidewall, a second surface coupled to the second sidewall, and the It is located between the first surface and the second surface and includes a third surface coupled to the step. The protrusion may be disposed on a corner portion of the base.

An upper surface of the step may be positioned lower than an upper surface of the first sidewall and an upper surface of the second sidewall.

The protrusion may include a third sidewall positioned between the first sidewall and the second sidewall. The magnet may include a fourth surface coupled to the third sidewall.

The base may include a first groove formed on at least one of an inner surface of the first sidewall facing the first surface of the magnet and an inner surface of the second sidewall facing the second surface of the magnet. An adhesive may be disposed in the first groove.

The base may include a second groove formed on an inner surface of the third sidewall facing the fourth surface of the magnet, and may include an adhesive disposed in the second groove.

The first groove extends in the optical axis direction, and a length of the first groove in the optical axis direction may be longer than a length of the magnet in the optical axis direction. The upper surface of the magnet may be located lower than the upper surface of the protruding part.

The lens driving device may include a cover accommodating the bobbin and including an upper plate and a side plate extending downward from the upper plate.

The lens driving device may include an upper elastic member disposed on the bobbin and coupled to upper surfaces of the bobbin and the protruding portion.

The base may include a stroke protrusion that protrudes from an upper surface of the protrusion and faces a lower surface of the upper plate, and the stroke protrusion may protrude above the upper elastic member.

The protrusion includes four protrusions spaced apart from each other, each of the four protrusions is disposed at a corresponding one of four corner portions of the base, the magnet includes first to fourth magnets, Each of the first to fourth magnets may be disposed on a corresponding one of the first to fourth protrusions.

The magnet may be disposed between the protrusion and an outer surface of the bobbin.

The protruding portion of the base may include a portion disposed between the side plate of the cover and the magnet, and the magnet may be spaced apart from the side plate of the cover.

The lens driving device may include a lower elastic member coupled to a lower portion of the bobbin and the upper surface of the base.

A lens driving device according to another embodiment includes a base including a protrusion protruding from an upper surface; a bobbin disposed spaced apart from the base; a magnet disposed on the protrusion; a coil disposed on the bobbin and moving the bobbin in an optical axis direction by interaction with the magnet; an upper elastic member coupled to the upper part of the bobbin and the protruding part; and a lower elastic member coupled to the lower part of the bobbin and the upper surface of the base, wherein the protruding part comprises a first sidewall coupled to the first surface of the magnet and a second sidewall coupled to the second surface of the magnet. And, the base includes a stepped protruding from the upper surface of the base and in contact with a third surface of the magnet located between the first surface and the second surface of the magnet.

A camera module according to an embodiment includes a lens; A lens driving device according to an embodiment; and an image sensor. An optical device according to an embodiment includes a camera module according to an embodiment.

In the lens driving device of this embodiment, the housing is omitted to reduce the number of constituent parts. In addition, the magnet can be stably fixed by the protrusion of the base. Therefore, a lens driving device having a compact structure and stably fixing a magnet is provided. Furthermore, a camera module including the lens driving device and an optical device including the camera module are provided.

1 is a perspective view showing a lens driving device of this embodiment.
2 is an exploded perspective view showing the lens driving device of this embodiment.
3 is a cross-sectional view of the lens driving device of the present embodiment taken along line aa'.
4 is a cross-sectional view of the lens driving device of the present embodiment taken along line bb'.
FIG. 5 is a cross-sectional view showing the camera module of the present embodiment with the view of FIG. 3 .
FIG. 6 is a cross-sectional view showing the camera module of the present embodiment with the view of FIG. 4 .
7 is a perspective view showing a cover of the lens driving device of this embodiment.
8 is a perspective view showing the base of the lens driving device of this embodiment.
9 is an exploded perspective view showing a base and a magnet of the lens driving device according to the present embodiment.
10 is an exploded perspective view showing a bobbin, a coil, an upper elastic member, and a lower elastic member of the lens driving device according to the present embodiment.

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.

The "optical axis direction" used below is defined as the optical axis direction of the lens module coupled to the lens driving device. On the other hand, "optical axis direction" may be used interchangeably with a vertical direction and a vertical direction.

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 main body (not shown), a display unit (not shown) disposed on one surface of the main body to display information, and a display unit installed on the main body to take images or pictures and electrically connected to the display unit. A camera module (not shown) may be included.

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).

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). Meanwhile, light passing through the lens module may be irradiated to 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 400 . However, the infrared filter may be mounted in a hole formed in the center of the base 400. 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. 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 apparatus 1000 of this embodiment will be described with reference to the drawings. 1 is a perspective view showing a lens driving device according to this embodiment, FIG. 2 is an exploded perspective view showing the lens driving device according to this embodiment, and FIG. 3 is a cross-sectional view of the lens driving device of this embodiment taken along line a-a', 4 is a cross-sectional view of the lens driving device of this embodiment taken along the line b-b', FIG. 5 is a perspective view showing a cover of the lens driving device of this embodiment, and FIG. 6 is a base of the lens driving device of this embodiment. 7 is an exploded perspective view showing a base and a magnet of the lens driving device according to this embodiment, and FIG. 8 is an exploded perspective view showing a bobbin, a coil, an upper elastic member, and a lower elastic member of the lens driving device according to this embodiment.

In the lens driving device 1000 of this embodiment, the bobbin 200 is elastically supported by the base 400 in the vertical direction, and the first driving unit 300 disposed on the bobbin 200 and the second driving unit 300 disposed on the base 400 Due to the electromagnetic interaction of the driver 500, the bobbin 200 can move in the vertical direction (optical axis direction). In this case, the lens module may move in the vertical direction (optical axis direction) integrally with the bobbin 200 . As a result, an auto focus function may be performed.

The lens driving device 1000 of this embodiment includes a cover 100, a bobbin 200, a first driving unit 300, a base 400, a second driving unit 500, an upper elastic member 600 and a lower elastic member ( 700) 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 "coil 300" and the second driving unit 500 is a "magnet 500" will be described. In other cases, the case where the first driving unit 300 is the "magnet 300" and the second driving unit 500 is the "coil 300" may be inferred.

The cover 100 may be an exterior member of the lens driving device 1000 . A base 400 may be disposed under the cover 100 . The cover 100 and the base 400 may be combined to form an inner space. A bobbin 200, a coil 300, a magnet 500, an upper elastic member 600, and a lower elastic member 700 may be disposed inside 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. A hole aligned with the optical axis may be formed in the center of the upper plate 110 . The top plate 110 may include a first edge S1-1, a second edge S1-2, a third edge S1-3, and a fourth edge S1-4.

The first side plate 120 , the second side plate 130 , the third side plate 140 , and the fourth side plate 150 may extend downward from the top plate 110 .

The first side plate 120 may be bent or bent at the first edge S1-1 to extend downward. The second side plate 130 may be bent or bent at the second edge S1 - 2 to extend downward. The third side plate 140 may be bent or bent at the third edge S1 - 3 to extend downward. The fourth side plate 150 may be bent or bent at the fourth edge S1 - 4 to extend downward.

Accordingly, the cover 100 may have a shape of a rectangular box having a hole formed on an upper surface, an open lower surface, and rounded corners. The lower opening of the cover 100 may be closed by the base 400 .

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 faces the third side plate 140 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.

The first side plate 120 may be disposed on one side of the first corner portion C1-1. The second side plate 130 may be disposed on the other side of the first corner portion C1-1. A first corner portion C1 - 1 may be disposed between the first side plate 120 and the second side plate 130 .

The second side plate 130 may be disposed on one side of the second corner portion C1-2. The third side plate 140 may be disposed on the other side of the second corner portion C1-2. The second corner portion C1 - 2 may be disposed between the second side plate 130 and the third side plate 140 .

The third side plate 140 may be disposed on one side of the fourth corner portion C1-4. The fourth side plate 150 may be disposed on the other side of the fourth corner portion C1-4. A fourth corner portion C1 - 4 may be disposed between the third side plate 140 and the fourth side plate 150 .

The fourth side plate 150 may be disposed on one side of the third corner portion C1-3. The first side plate 120 may be disposed on the other side of the third corner portion C1-3. A third corner portion C1 - 3 may be disposed between the fourth side plate 150 and the first side plate 120 .

The cover 100 may include a first groove 160 . The first groove 160 may be formed concave upward from the lower surfaces of the first side plate 120, the first corner portion C1-1, and the second side plate 130. The first support part 460 of the base 400 may be disposed in the first groove 160 . In this case, the lower surface of the first side plate 120 formed by the first groove 160, the lower surface of the first corner portion C1-1, and the lower surface of the second side plate 130 are the upper surface of the first support part 460. can come into contact with (bond) with.

The first groove 160 may include a 1-1 groove 160-1 and a 1-2 groove 160-2. The 1-1 groove 160-1 may be located on the side of the first side plate 120, and the 1-2 groove 160-2 may be located on the side of the second side plate 130. The 1-1 groove 160 - 1 may extend upward from at least a portion of the lower surface of the first side plate 120 formed by the first groove 160 . The first and second grooves 160 - 2 may extend upward from at least a portion of the lower surface of the second side plate 130 formed by the first groove 160 . An adhesive may be applied to the 1-1 groove 160-1 and the 1-2 groove 160-2.

The cover 100 may include a second groove 170 . The second groove 170 may be concave upward from the lower surfaces of the second side plate 130 , the second corner portion C1 - 2 , and the third side plate 140 . The second support part 470 of the base 400 may be disposed in the second groove 170 . In this case, the lower surface of the second side plate 130 formed by the second groove 170, the lower surface of the second corner portion C1-2, and the lower surface of the third side plate 140 are the upper surface of the second support part 470. can come into contact (bond) with.

The second groove 170 may include a 2-1 groove 170-1 and a 2-2 groove (not shown). The 2-1 groove 170-1 may be located on the side of the second side plate 130, and the 2-2 groove may be located on the side of the third side plate 140. The 2-1 groove 170 - 1 may extend upward from at least a portion of the lower surface of the second side plate 130 formed by the second groove 170 . The 2-2 groove may be formed extending upward from at least a part of the lower surface of the third side plate 140 formed by the second groove 170 . An adhesive may be applied to the 2-1 groove 170-1 and the 2-2 groove.

The cover 100 may include a third groove 180 . The third groove 180 may be concave upward from the lower surfaces of the first side plate 120, the third corner portion C1-3, and the fourth side plate 150. The third groove 180 may be disposed on the third support part 480 of the base 400 . In this case, the lower surface of the first side plate 120 formed by the third groove 180, the lower surface of the third corner part C1-3, and the lower surface of the fourth side plate 150 are the upper surface of the third support part 480. can come into contact with (bond) with.

The third groove 180 may include a 3-1 groove (not shown) and a 3-2 groove 180-2. The 3-1 groove may be located on the side of the fourth side plate 150, and the 3-2 groove 180-2 may be located on the side of the first side plate 120. The 3-1 groove may be formed extending upward from at least a part of the lower surface of the fourth side plate 150 formed by the third groove 180 . The 3-2 groove 180 - 2 may extend upward from at least a portion of the lower surface of the first side plate 120 formed by the third groove 180 . An adhesive may be applied to the 3-1 groove and the 3-2 groove 180-2.

The cover 100 may include a fourth groove 190 . The fourth groove 190 may be concave upward from the lower surfaces of the third side plate 140 , the fourth corner portion C1 - 4 , and the fourth side plate 150 . A fourth support part (not shown) of the base 400 may be disposed in the fourth groove 190 . In this case, the lower surface of the third side plate 140 formed by the fourth groove 190, the lower surface of the fourth corner portion C1-4, and the lower surface of the fourth side plate 150 are in contact with the upper surface of the fourth support part ( can be combined).

The fourth groove 190 may include a 4-1 groove 190-1 and a 4-2 groove 190-2. The 4-1 groove 190-1 may be located on the side of the third side plate 140, and the 4-2 groove 190-2 may be located on the side of the fourth side plate 150. The 4-1 groove 190-1 may extend upward from at least a portion of the lower surface of the third side plate 140 formed by the fourth groove 190. The 4-2 groove 190 - 2 may extend upward from at least a portion of the lower surface of the fourth side plate 150 formed by the fourth groove 190 . An adhesive may be applied to the 4-1 groove 190-1 and the 4-2 groove 190-2.

In this modification (not shown), the cover 100 may have a cylindrical shape, and in this case, the first corner portion C1-1, the second corner portion C1-2, and the third corner portion C1-1. 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 side plate 150 is 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) each disposed between the four It can be a side plate.

The bobbin 200 may be disposed inside the main body of the optical device. The bobbin 200 may be disposed inside the cover 100 and the base 400 . A lens module may be disposed inside the bobbin 200 . The bobbin 200 and the lens module are coupled so that when the bobbin 200 moves, the lens module can move integrally with the bobbin 200 . An upper elastic member 600 may be disposed on the bobbin 200 . A lower elastic member 700 may be disposed below the bobbin 200 . The bobbin 200 may be elastically supported by the base 400 in the vertical direction (optical axis direction) by the upper elastic member 600 and the lower elastic member 700 . A coil 300 may be disposed on an outer circumferential surface of the bobbin 200 .

The coil 300 may be disposed on an outer circumferential surface of the bobbin 200 . The coil 300 may be wound on the outer circumferential surface of the bobbin 200 . Coil 300 may be in the form of a “coil block”. Coil 300 may be an "electromagnet". The coil 300 may electromagnetically interact with the magnet 500 to provide a driving force for the bobbin 200. One end and the other end of the coil 300 may be drawn out.

The coil 300 may be disposed to face (correspond to) the magnet 500 . The coil 300 may interact with the magnet 500 electromagnetically. When current is applied to the coil 300, electromagnetic force may be generated by electromagnetic interaction with the magnet 500.

The coil 300 may be electrically connected to the lower elastic member 700 . One end of the coil 300 may be electrically connected to the first lower elastic member 710 . The other end of the coil 300 may be electrically connected to the second lower elastic member 720 . The coil 300 may generate electromagnetic force by receiving current from the lower elastic member 700 . As a result, the bobbin 200 can be driven in the vertical direction (optical axis direction) to perform the “AF function”.

The base 400 may be an exterior member of the lens driving device 1000 . A cover 100 may be disposed on the base 400 . The base 400 and the cover 100 may be combined to form an inner space. Inside the base 400, the bobbin 200, the coil 300, the magnet 500, the upper elastic member 600 and the lower elastic member 700 may be disposed. The base 400 may be a plastic injection molding.

The base 400 includes a body 410, a first protrusion 420, a second protrusion 430, a third protrusion 440, a fourth protrusion 450, a first support part 460, and a second support part 470. ), a third support part 480 and a fourth support part (not shown).

The body 410 may have a square plate shape in which a hole is formed in the center in the optical axis direction. The body 410 includes a first edge S2-1, a second edge S2-2, a third edge S2-3, a fourth edge S2-4, and a first corner portion C2-1. , a second corner portion C2-2, a third corner portion C2-3, and a fourth corner portion C2-4.

The first edge S2-1 is positioned to correspond (opposite, overlap) with the first side plate 120 in the vertical direction, and the second edge S2-2 corresponds to (opposite) the second side plate 130 in the vertical direction. , overlapping), the third edge (S3-3) is located to correspond (opposite, overlap) in the vertical direction with the third side plate 140, and the fourth edge (S2-4) is located to the fourth side plate 150 and It is located to correspond (opposite, overlap) in the vertical direction, and the first corner portion (C2-1) is positioned to correspond (opposite, overlap) in the vertical direction to the first corner portion (C1-1) of the cover 100, The second corner part C2-2 is positioned to correspond (opposite, overlap) with the second corner part C1-2 of the cover 100 in the vertical direction, and the third corner part C2-3 is the cover 100 is positioned to correspond (opposite, overlap) in the vertical direction with the third corner portion C1-3 of the cover 100, and the fourth corner portion C2-4 has a vertical direction with the fourth corner portion C1-4 of the cover 100. It can be positioned to correspond (opposite, overlap) with.

The first corner part C2-1 of the base 400 may be located adjacent to the second corner part C2-2 of the base 400 and the third corner part C2-3 of the base 400. there is. The first corner part C2 - 1 of the base 400 may be located on the opposite side of the fourth corner part C2 - 3 of the base 400 .

The second corner portion C2-2 of the base 400 may be located adjacent to the first corner portion C2-1 of the base 400 and the fourth corner portion C2-4 of the base 400. there is. The second corner part C2 - 1 of the base 400 may be located on the opposite side of the third corner part C2 - 3 of the base 400 .

The third corner portion C2-3 of the base 400 may be located adjacent to the second corner portion C2-2 of the base 400 and the fourth corner portion C2-4 of the base 400. there is. The third corner part C2 - 3 of the base 400 may be located on the opposite side of the first corner part C2 - 1 of the base 400 .

The fourth corner portion C2-4 of the base 400 may be located adjacent to the second corner portion C2-2 of the base 400 and the third corner portion C2-3 of the base 400. there is. The fourth corner part C2 - 4 of the base 400 may be located on the opposite side of the second corner part C2 - 2 of the base 400 .

The first edge S2-1 of the base 400 may be located between the first corner portion C2-1 of the base 400 and the third corner portion C2-3 of the base 400. . The first edge S2 - 1 of the base 400 may connect the first corner portion C2 - 1 of the base 400 and the third corner portion C2 - 3 of the base 400 .

The second edge S2-2 of the base 400 may be located between the first corner portion C2-1 of the base 400 and the second corner portion C2-2 of the base 400. . The second edge S2 - 2 of the base 400 may connect the first corner portion C2 - 1 of the base 400 and the second corner portion C2 - 2 of the base 400 .

The third edge S2-3 of the base 400 may be located between the second corner portion C2-2 of the base 400 and the fourth corner portion C2-4 of the base 400. . The third edge S2 - 3 of the base 400 may connect the second corner portion C2 - 2 of the base 400 and the fourth corner portion C2 - 4 of the base 400 .

The fourth edge S2-4 of the base 400 may be located between the third corner portion C2-3 of the base 400 and the fourth corner portion C2-4 of the base 400. . The fourth edge S2 - 4 of the base 400 may connect the third corner portion C2 - 3 of the base 400 and the fourth corner portion C2 - 4 of the base 400 .

When the cover 100 and the base 400 are coupled, the upper surface of the first edge S2-1 and the lower surface of the first side plate 120 are in contact (coupled), and the upper surface of the second edge S2-2 The lower surface of the second side plate 130 is in contact (coupled), the upper surface of the third edge (S2-3) and the lower surface of the third side plate 140 are in contact (coupled), and the fourth edge (S2-4) The upper surface and the lower surface of the fourth side plate 150 may contact (combine).

Adhesive may be applied to contact portions between the edges S2-1, S2-2, S2-3, and S2-4 of the base 400 and the side plates 120, 130, 140, and 150 of the cover 100.

The first protrusion 420 , the second protrusion 430 , the third protrusion 440 , and the fourth protrusion 450 may protrude upward from the main body 410 . The first protrusion 420 and the first support part 460 may be located at the first corner part C2 - 1 of the base 400 . The second protrusion 430 and the second support 470 may be located at the second corner portion C2-2. The third protrusion 440 and the third support 480 may be located at the third corner portion C2-3. The fourth protrusion 450 and the fourth support portion (not shown) may be located at the fourth corner portion C2-4.

In this case, the first protrusion 420 may be located inside the first support part 460, the second protrusion 430 may be located inside the second support part 470, and the third protrusion 440 ) may be located inside the third support part 480, and the fourth protrusion 450 may be located inside the fourth support part.

The first support part 460 may be positioned outside the first protrusion part 420, the second support part 470 may be positioned outside the second protrusion part 430, and the third support part 480 may be positioned outside the second protrusion part 430. The third protrusion 440 may be located outside, and the fourth support may be located outside the fourth protrusion 450 .

That is, the plurality of protrusions 420, 430, 440, and 450 of the base 400 may be located closer to the central axis in the vertical direction of the base 400 than the plurality of support parts 460, 470, and 480 of the base 400. there is. In addition, the plurality of support portions 460, 470, and 480 of the base 400 may be located farther from the central axis in the vertical direction of the base 400 than the plurality of protrusions 420, 430, 440, and 450 of the base 400. there is.

The vertical lengths (heights) of the first protrusion 420, the second protrusion 430, the third protrusion 440, and the fourth protrusion 450 are the first support portion 460, the second support portion 470, It may be longer than the length (height) of the third support part 480 and the fourth support part in the vertical direction.

That is, the plurality of protrusions 420 , 430 , 440 , and 450 of the base 400 may be formed higher than the plurality of support parts 460 , 470 , and 480 of the base 400 .

A first magnet 510 may be disposed on the first protrusion 420 . A second magnet 520 may be disposed on the second protrusion 430 . A third magnet 530 may be disposed on the third protrusion 440 . A fourth magnet 540 may be disposed on the fourth protrusion 450 .

The first protrusion 420 is disposed along the 1-1 sidewall 421 disposed along the first edge S2-1 of the base 400 and the second edge S2-2 of the base 400. the 1-2 sidewall 422, the 1-3 sidewall 423 disposed between the 1-1st sidewall 421 and the 1-2nd sidewall 422, and the 1-1st sidewall 421 and one or more first grooves (not shown) located on at least one of the 1-2 sidewalls 422 and 1-3 sidewalls 423 and formed in a vertical direction on a surface facing the first magnet 510; The first stroke protrusion 425 located on the upper surface of the 1-3 side wall 423 and protruding upward, the upper surface of which contacts the lower surface of the upper plate 110, and the 1-1 side wall 421 protruding upward from the body 410 ) and a first step 427 connecting the lower end of the first-second sidewall 422 in an oblique shape.

The 1-1st sidewall 421 may extend from the first corner portion C2 - 1 of the base 400 toward the third corner portion C2 - 2 of the base 400 . The first-second sidewall 422 may extend from the first corner portion C2 - 1 of the base 400 toward the second corner portion C2 - 2 of the base 400 .

The first step 427 connects the lower portion of the 1-1st sidewall 421 and the lower portion of the 1-2nd sidewall 422 and may be disposed to face (face to face) the first magnet 510 . The vertical length (height) of the first step 427 may be shorter than the vertical length (height) of the 1-1 sidewall 421, the 1-2nd sidewall 422, and the 1-3 sidewall 423. there is.

The first stroke protrusion 425 may protrude above the upper elastic member 600 . The first stroke protrusion 425 may face the lower surface of the upper plate 110 of the cover 100 .

The second protrusion 430 is disposed along the 2-1st sidewall 431 disposed along the second edge S2-2 of the base 400 and the third edge S2-3 of the base 400. The 2-2nd sidewall 432, the 2-3rd sidewall 433 disposed between the 2-1st sidewall 431 and the 2-2nd sidewall 432, and the 2-1st sidewall 431 and one or more second grooves 434 located on at least one of the 2-2nd sidewall 432 and the 2-3rd sidewall 433 and formed in the optical axis direction on a surface facing the second magnet 520; The second stroke protrusion 435 located on the upper surface of the 2-3 side wall 433 and protruding upward and having the upper surface in contact with the lower surface of the upper plate 110, and the 2-1 side wall 431 protruding upward from the main body 410 A second step 437 connecting the lower end of the and the lower end of the 2-2 sidewall 432 in an oblique shape may be included.

The 2-1st side wall 431 may extend from the second corner portion C2 - 2 of the base 400 toward the first corner portion C2 - 1 of the base 400 . The 2-2nd sidewall 432 may extend from the second corner portion C2 - 2 of the base 400 toward the fourth corner portion C2 - 4 of the base 400 .

The second step 437 connects the lower portion of the 2-1st sidewall 431 and the lower portion of the 2-2nd sidewall 432 and may be disposed to face (face to face) the second magnet 520 . The vertical length (height) of the second step 437 may be shorter than the vertical length (height) of the 2-1st sidewall 431, the 2-2nd sidewall 432, and the 2-3rd sidewall 433. there is.

The second stroke protrusion 435 may protrude above the upper elastic member 600 . The second stroke protrusion 435 may face the lower surface of the upper plate 110 of the cover 100 .

The third protrusion 440 is disposed along the 3-1 sidewall 441 disposed along the fourth edge S2-4 of the base 400 and the first edge S3-1 of the base 400. a 3-2 sidewall 442, a 3-3 sidewall 443 disposed between the 3-1 sidewall 441 and the 3-2nd sidewall 442, and a 3-1 sidewall 441 and one or more third grooves 444 located on at least one of the 3-2 sidewall 442 and the 3-3 sidewall 443 and formed in the optical axis direction on a surface facing the third magnet 530; The third stroke protrusion 445 located on the upper surface of the 3-3 side wall 443 and protruding upward and having the upper surface in contact with the lower surface of the upper plate 110, and the 3-1 side wall 441 protruding upward from the main body 410 It may include a third step 447 connecting the lower end of and the lower end of the 3-2 sidewall 442 in an oblique shape.

The 3-1 side wall 441 may extend from the third corner portion C2 - 3 of the base 400 toward the fourth corner portion C2 - 4 of the base 400 . The 3-2 sidewall 442 may extend from the third corner portion C2 - 3 of the base 400 toward the first corner portion C2 - 1 of the base 400 .

The third step 447 connects the lower portion of the 3-1st sidewall 441 and the lower portion of the 3-2nd sidewall 442 and may be disposed to face (face to face) the third magnet 530 . The vertical length (height) of the third step 447 may be shorter than the vertical length (height) of the 3-1 sidewall 441, the 3-2 sidewall 442, and the 3-3 sidewall 443. there is.

The third stroke protrusion 445 may protrude above the upper elastic member 600 . The second stroke protrusion 445 may face the lower surface of the upper plate 110 of the cover 100 .

The fourth protrusion 450 is disposed along the 4-1 sidewall 451 disposed along the third edge S2-3 of the base 400 and the fourth edge S2-4 of the base 400. The 4-2 side wall 452, the 4-3 side wall 453 disposed between the 4-1 side wall 451 and the 4-2 side wall 452, and the 4-1 side wall 451 and one or more fourth grooves 454 located on at least one of the 4-2 sidewall 452 and the 4-3 sidewall 453 and formed in the optical axis direction on a surface facing the fourth magnet 540; The fourth stroke protrusion 455 located on the upper surface of the 4-3 side wall 453 and protruding upward and having the upper surface in contact with the lower surface of the upper plate 110, and the 4-1 side wall 451 protruding upward from the main body 410 It may include a fourth step 457 connecting the lower end of the and the lower end of the 4-2 sidewall 452 in an oblique shape.

The 4-1st side wall 451 may extend from the fourth corner portion C2 - 4 of the base 400 toward the second corner portion C2 - 2 of the base 400 . The 4-2 side wall 452 may extend from the fourth corner portion C2 - 4 of the base 400 toward the third corner portion C2 - 3 of the base 400 .

The fourth step 447 connects the lower portion of the 4-1st sidewall 451 and the lower portion of the 4-2nd sidewall 452 and may be disposed to face (face to face) the fourth magnet 540 . The vertical length (height) of the fourth step 457 may be shorter than the vertical length (height) of the 4-1 sidewall 451, the 4-2 sidewall 452, and the 4-3 sidewall 453. there is.

The fourth stroke protrusion 455 may protrude above the upper elastic member 600 . The fourth stroke protrusion 455 may face the lower surface of the upper plate 110 of the cover 100 .

The magnet 500 may be disposed on the base 400 . The magnet 500 may face the coil 300 . The magnet 500 may provide driving force to the bobbin 200 by electromagnetically interacting with the coil 300 . The magnet 500 may include a first magnet 510 , a second magnet 520 , a third magnet 530 and a fourth magnet 540 . The first magnet 510, the second magnet 520, the third magnet 530, and the fourth magnet 540 may be “permanent magnets”.

The first magnet 510 may be disposed on the first protrusion 420 . The second magnet 520 may be disposed on the second protrusion 430 . The third magnet 530 may be disposed on the third protrusion 440 . The fourth magnet 540 may be disposed on the fourth protrusion 450 .

The first magnet 510 may include a 1-1 surface 511 , a 1-2 surface 512 , a 1-3 surface 513 , and a 1-4 surface 514 . The 1-1 surface 511 may face the inner surface of the 1-1 side wall 421 of the first protrusion 420 . The 1-1 surface 511 may be combined with (contact with) the inner surface of the 1-1 side wall 421 . The first-second surface 512 may face an inner surface of the first-second sidewall 422 of the first protrusion 420 . The first-second surface 512 may be coupled (contacted) with an inner surface of the first-second sidewall 422 of the first protrusion 420 . The first-third surface 513 may face an inner surface of the first-third sidewall 423 of the first protrusion 420 . The first-third surface 513 may be coupled (contacted) with an inner surface of the first-third side wall 423 of the first protrusion 420 . When the first protrusion 420 and the first magnet 510 are coupled, an adhesive may be applied to a first groove (not shown) of the first protrusion 420 . The first to fourth surfaces 514 may face the outer surface of the coil 300 . The lower part of the first to fourth surfaces 514 may face the inner surface of the first step (not shown). The lower part of the first to fourth surfaces 514 may be coupled (contacted) with the inner surface of the first step.

The second magnet 520 may include a 2-1 surface 521 , a 2-2 surface 522 , a 2-3 surface 523 , and a 2-4 surface 524 . The 2-1 surface 521 may face the inner surface of the 2-1 side wall 431 of the second protrusion 430 . The 2-1 surface 521 may be coupled (contacted) with the inner surface of the 2-1 side wall 431 . The 2-2nd surface 522 may face the inner surface of the 2-2nd sidewall 432 of the second protrusion 430 . The 2-2 surface 522 may engage (contact) with an inner surface of the 2-2 side wall 432 of the second protrusion 430 . The 2-3 surface 523 may face the inner surface of the 2-3 side wall 433 of the second protrusion 430 . The 2-3 surface 523 may be coupled (contact) with the inner surface of the 2-3 side wall 433 of the second protrusion 430 . When the second protrusion 430 and the second magnet 520 are coupled, an adhesive may be applied to the second groove 432 of the second protrusion 430 . The second-fourth surface 524 may face the outer surface of the coil 300 . The lower part of the second-fourth surface 524 may face the inner surface of the second step 437 . The lower part of the second-fourth surface 524 may be coupled (contacted) with the inner surface of the second step 437 .

The third magnet 530 may include a 3-1 surface 531 , a 3-2 surface 532 , a 3-3 surface 533 , and a 3-4 surface 534 . The 3-1 surface 531 may face the inner surface of the 3-1 side wall 441 of the third protrusion 440 . The 3-1 surface 531 may be coupled (contact) with the inner surface of the 3-1 side wall 441 . The 3-2 surface 532 may face the inner surface of the 3-2 side wall 442 of the third protrusion 440 . The 3-2 surface 532 may engage (contact) with the inner surface of the 3-2 side wall 442 of the third protrusion 440 . The 3-3 surface 533 may face the inner surface of the 3-3 side wall 443 of the third protrusion 440 . The 3-3 surface 533 may be coupled (contacted) with the inner surface of the 3-3 side wall 443 of the third protrusion 440 . When the third protrusion 440 and the third magnet 530 are coupled, an adhesive may be applied to the third groove 442 of the third protrusion 440 . The third and fourth surfaces 534 may face the outer surface of the coil 300 . A lower portion of the third-fourth side 534 may face the inner side of the third step 447 . The lower part of the third-fourth surface 534 may be coupled (contacted) with the inner surface of the third step 447 .

The fourth magnet 540 may include a 4-1 surface 541 , a 4-2 surface 542 , a 4-3 surface 543 , and a 4-4 surface 544 . The 4-1 surface 541 may face the inner surface of the 4-1 side wall 451 of the fourth protrusion 450 . The 4-1 surface 541 may be combined with (contact with) the inner surface of the 4-1 side wall 451 . The 4-2 surface 542 may face the inner surface of the 4-2 side wall 452 of the fourth protrusion 450 . The 4-2 surface 542 may engage (contact) with the inner surface of the 4-2 side wall 452 of the fourth protrusion 450 . The 4-3 surface 543 may face the inner surface of the 4-3 side wall 453 of the fourth protrusion 450 . The 4-3 surface 543 may engage (contact) with the inner surface of the 4-3 side wall 453 of the fourth protrusion 450 . When the fourth protrusion 450 and the fourth magnet 540 are coupled, an adhesive may be applied to the fourth groove 452 of the fourth protrusion 450 . The 4-4th surface 544 may face the outer surface of the coil 300 . The lower part of the 4-4th surface 544 may face the inner surface of the fourth step 457 . The lower part of the 4-4th surface 544 may be coupled (contacted) with the inner surface of the fourth step 457 .

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 300 .

The upper elastic member 600 may be disposed above the base 400 . The upper elastic member 600 may be disposed above the bobbin 200 . The upper elastic member 600 may be coupled to the base 400 and the bobbin 200 . The upper elastic member 600 may elastically connect between the base 400 and the bobbin 200 . The upper elastic member 600 may elastically support the bobbin 200 .

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, the eighth upper elastic member 680, and the ninth upper elastic member 690 may be included.

The fifth upper elastic member 650 may be disposed inside the first upper elastic member 610, the second upper elastic member 620, the third upper elastic member 630, and the fourth upper elastic member 640. there is. The first upper elastic member 610, the second upper elastic member 620, the third upper elastic member 630, and the fourth upper elastic member 640 may be disposed outside the fifth upper elastic member 650. there is.

The sixth upper elastic member 660 may connect the first upper elastic member 610 and the fifth upper elastic member 650 . The seventh upper elastic member 670 may connect the second upper elastic member 620 and the fifth upper elastic member 650 . The eighth upper elastic member 680 may connect the third upper elastic member 630 and the fifth upper elastic member 650 . The ninth upper elastic member 690 may connect the fourth upper elastic member 640 and the fifth upper elastic member 650 .

The first upper elastic member 610 may be disposed above the first protrusion 420 . The lower surface of the first upper elastic member 610 and the upper surface of the first protrusion 420 may be coupled (contacted). The second upper elastic member 620 may be disposed above the second protrusion 430 . The lower surface of the second upper elastic member 620 and the upper surface of the second protrusion 430 may be coupled (contacted). The third upper elastic member 630 may be disposed above the third protrusion 440 . The lower surface of the third upper elastic member 630 and the upper surface of the third protrusion 440 may be coupled (contacted). The fourth upper elastic member 640 may be disposed above the fourth protrusion 450 . The lower surface of the fourth upper elastic member 640 and the upper surface of the fourth protrusion 450 may be coupled (contacted). The fifth upper elastic member 650 may be disposed below the bobbin 200 . The upper surface of the fifth upper elastic member 650 may be coupled (contacted) with the lower surface 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 300 . The lower elastic member 700 may be electrically connected to the coil 300 . The lower elastic member 700 may be electrically connected to the substrate of the camera module. The lower elastic member 700 may electrically connect the coil 300 and the substrate. Accordingly, current may be supplied from the substrate to the coil 300 through the lower elastic member 700 . In this case, the direction, wavelength, intensity, etc. of the current supplied to the coil 300 can be controlled.

The lower elastic member 700 may be disposed on the body 410 of the base 400. The lower elastic member 700 may be disposed below the bobbin 200 . The lower elastic member 700 may be coupled to the base 400 and the bobbin 200 . The lower elastic member 700 may elastically connect between the base 400 and the bobbin 200 . The lower elastic member 700 may elastically support the bobbin 200 .

The lower elastic member 700 may include a first lower elastic member 710 and a second lower elastic member 720 . The first lower elastic member 710 and the second lower elastic member 720 may be spaced apart from each other. The first lower elastic member 710 may be disposed below the bobbin 200 and may be disposed above the body 410 of the base 400 . The upper surface of the first lower elastic member 710 may contact (couple with) the lower surface of the bobbin 200 and the upper surface of the body 410 of the base 400 . The second lower elastic member 720 may be disposed below the bobbin 200 . The upper surface of the second lower elastic member 720 may contact (couple with) the lower surface of the bobbin 200 and the upper surface of the body 410 of the base 400 .

The first lower elastic member 710 may be electrically connected to one lead wire of the coil 300 . The second lower elastic member 720 may be electrically connected to the lead wire on the other side of the coil 300 . The first lower elastic member 710 may include a first terminal 711 . The first terminal 711 may extend downward from the first lower elastic member 710 . The first terminal 711 may be electrically connected to the substrate of the camera module. The second lower elastic member 720 may include a second terminal 712 . The second terminal 712 may extend downward from the second lower elastic member 720 . The second terminal 712 may be electrically connected to the substrate of the camera module. The substrate, the first lower elastic member 710 , the coil 300 and the second lower elastic member 720 may form one circuit. As a result, current may flow through the coil 300 .

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 being 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 (20)

A base including a protrusion protruding from the upper surface;
a bobbin disposed spaced apart from the base;
a magnet disposed on the protrusion; and
A coil disposed on the bobbin and moving the bobbin in an optical axis direction by interaction with the magnet,
The protrusion includes a first side wall and a second side wall,
The base includes a step protruding from the upper surface of the base and connecting a lower portion of the first sidewall and a lower portion of the second sidewall,
The magnet drives a lens including a first surface coupled to the first sidewall, a second surface coupled to the second sidewall, and a third surface positioned between the first and second surfaces and coupled to the step. Device. According to claim 1,
The lens driving device wherein the protrusion is disposed at a corner portion of the base. According to claim 1,
An upper surface of the step is positioned lower than an upper surface of the first sidewall and an upper surface of the second sidewall. According to claim 1,
The lens driving device of claim 1 , wherein the protruding portion includes a third sidewall positioned between the first sidewall and the second sidewall. According to claim 4,
The lens driving device of claim 1 , wherein the magnet includes a fourth surface coupled to the third sidewall. According to claim 1,
The base includes a first groove formed on at least one of an inner surface of the first sidewall facing the first surface of the magnet and an inner surface of the second sidewall facing the second surface of the magnet; ,
A lens driving device in which an adhesive is disposed in the first groove. According to claim 5,
The base includes a second groove formed on an inner surface of the third sidewall facing the fourth surface of the magnet,
A lens driving device in which an adhesive is disposed in the second groove. According to claim 6,
The first groove extends in the optical axis direction, and a length of the first groove in the optical axis direction is longer than a length of the magnet in the optical axis direction. According to claim 1,
The upper surface of the magnet is positioned lower than the upper surface of the protruding part. According to claim 1,
A lens driving device comprising a cover accommodating the bobbin and including an upper plate and a side plate extending downward from the upper plate. According to claim 10,
and an upper elastic member disposed on the bobbin and coupled to upper surfaces of the bobbin and the protruding portion. According to claim 11,
The base includes a stroke protrusion protruding from the upper surface of the protrusion and facing the lower surface of the upper plate,
The stroke protrusion protrudes upward from the upper elastic member. According to claim 1,
The protrusion includes four protrusions spaced apart from each other,
Each of the four protrusions is disposed at a corresponding one of the four corner portions of the base,
The magnet includes first to fourth magnets,
Each of the first to fourth magnets is disposed on a corresponding one of the first to fourth protrusions. According to claim 1,
The magnet is disposed between the protruding portion and the outer surface of the bobbin. According to claim 10,
The protrusion of the base includes a portion disposed between the side plate of the cover and the magnet,
The magnet is spaced apart from the side plate of the cover lens driving device. According to claim 11,
A lens driving device comprising a lower elastic member coupled to a lower portion of the bobbin and the upper surface of the base. A base including a protrusion protruding from the upper surface;
a bobbin disposed spaced apart from the base;
a magnet disposed on the protrusion;
a coil disposed on the bobbin and moving the bobbin in an optical axis direction by interaction with the magnet;
an upper elastic member coupled to the upper part of the bobbin and the protruding part; and
And a lower elastic member coupled to the lower part of the bobbin and the upper surface of the base,
The protruding part includes a first sidewall coupled to the first surface of the magnet and a second sidewall coupled to the second surface of the magnet,
The base includes a stepped protruding from the upper surface of the base and in contact with a third surface of the magnet positioned between the first surface and the second surface of the magnet. According to claim 17,
The lens driving device of claim 1 , wherein the protrusion part includes a third sidewall positioned between the first sidewall and the second sidewall, and the magnet includes a fourth surface coupled to the third sidewall. lens;
a lens driving device according to any one of claims 1 to 18; and
A camera module including an image sensor. An optical device comprising the camera module according to claim 19.

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