Camera module and optical device

Abstract

An embodiment of the present invention relates to a camera module comprising: a housing; a lens barrel which is provided in the housing; a first elastic member and a second elastic member, the first elastic member and the second elastic member being coupled to the lens barrel; and a piezoelectric motor including a post disposed between the first elastic member and the second elastic member, in which: the first elastic member and the second elastic member squeeze the post of the piezoelectric motor; the lens barrel comprises a main body part and a coupling part, and the coupling part is connected to the main body part; and a coupling portion coupled to one side of the second elastic member and including a groove coupled to one side of the second elastic member and a protrusion coupled to the other side of the second elastic member.

Description

[0001] Divisional application

[0002] This application is a divisional application of Chinese patent application No. 202180036229.9, filed on May 18, 2021, entitled "Camera Module and Optical Device". Technical Field

[0003] This embodiment relates to a camera module and an optical device. Background Technology

[0004] Portable devices such as tablets or smartphones are equipped with camera modules used to acquire image information from objects. These portable devices increasingly require camera modules with high resolution and high performance, and recently, with advancements in autofocus (AF) functionality and focal length, products capable of optical zoom have been released.

[0005] Typically, the camera module in a portable device moves the lens along the optical axis to adjust autofocus and / or optical zoom. To move the lens, a voice coil motor (VCM) type actuator is widely used. This type of actuator moves the lens by electromagnetic force through coils and magnets placed on the camera module, and uses Hall sensors to detect the position and movement of these lenses.

[0006] However, the problem with traditional VCM actuators is that due to their weak driving force, it is difficult to implement long strokes for high magnification zoom. Therefore, the use of piezoelectric motors has been increasing in recent years.

[0007] However, because piezoelectric motors have the characteristic of using vibrations generated from piezoelectric elements to drive lenses via carbon rods, there is a problem that the piezoelectric motor must be fixed by squeezing it with strong pressure. Summary of the Invention

[0008] Technical topics

[0009] This embodiment aims to provide a lens driving device, which includes an elastic member for using strong pressure to compress and fix the lens driving device using a piezoelectric motor.

[0010] In addition, it is intended to provide a lens driving device in which an elastic member is capable of keeping the pressure applied to the piezoelectric motor constant.

[0011] Furthermore, it is intended to provide a lens driving device in which the structure of the elastic member is simplified to achieve miniaturization and improvement of the assembly structure.

[0012] Technical solution

[0013] The camera module according to this embodiment includes: a housing; a lens barrel disposed inside the housing; a first elastic member and a second elastic member connected to the lens barrel; and a piezoelectric motor including a column disposed between the first elastic member and the second elastic member, wherein the first elastic member and the second elastic member compress the column of the piezoelectric motor, wherein the lens barrel includes a main body unit and a connecting unit connected to the main body unit, and wherein the connecting unit includes a groove and a protrusion, the groove being connected to one side of the second elastic member and the protrusion being connected to the other side of the second elastic member.

[0014] Furthermore, the connecting unit of the lens barrel may include a first groove and a second groove, with one side of the first elastic member inserted into the first groove and the other side of the first elastic member inserted into the second groove.

[0015] Furthermore, the first elastic member may include a first portion, a second portion, and a third portion, wherein the first portion has a first length in the optical axis direction, the second portion and the third portion extend from the first portion, and the second portion and the third portion have a second length in the optical axis direction that is less than the first length.

[0016] Furthermore, the first portion of the first elastic member includes: a first inclined surface disposed between the first portion of the first elastic member and the second portion of the first elastic member; and a second inclined surface disposed between the first portion of the first elastic member and the third portion of the first elastic member, wherein the inclination direction of the first inclined surface of the first elastic member may be different from the inclination direction of the second inclined surface of the first elastic member.

[0017] Furthermore, the first elastic member includes an extension that bends from the first portion at a first angle, wherein the extension of the first elastic member may not contact the column of the piezoelectric motor.

[0018] Furthermore, the second elastic member includes: a first region disposed on one side of the connecting unit of the lens barrel; a second region disposed on the other side of the connecting unit of the lens barrel; and a third region connecting the first region and the second region, wherein the third region of the second elastic member is formed as a flat shape and can at least partially contact the column of the piezoelectric motor.

[0019] Furthermore, the second region of the second elastic member may include a bent portion that bends toward the third region of the second elastic member.

[0020] Furthermore, the other side surface of the connecting unit of the lens barrel includes a groove, wherein the bent portion of the second region of the second elastic member can be configured to be engaged by the groove of the connecting unit of the lens barrel.

[0021] Furthermore, the curved portion of the second elastic member is formed in a hook shape, and the curved portion of the second elastic member and the lens barrel can be hooked together.

[0022] Furthermore, the first elastic member includes: a first portion having a first length in the optical axis direction; a second portion extending from the first portion and having a second length in the optical axis direction less than the first length; and a third portion, wherein the second region of the second elastic member includes two second regions spaced apart from each other in the optical axis direction, and wherein the second portion of the first elastic member can be disposed in the space between the two second regions of the second elastic member.

[0023] Furthermore, the second portion and the third portion of the first elastic member may be parallel to the third region of the second elastic member.

[0024] Furthermore, the connecting unit of the lens barrel includes: a first outer surface; a second outer surface disposed on the opposite side of the first outer surface; and a third outer surface connecting the first outer surface and the second outer surface, wherein the first elastic member is disposed on the second outer surface of the connecting unit of the lens barrel, and wherein the second elastic member may be spaced apart from the first elastic member.

[0025] Furthermore, the connecting unit of the lens barrel includes: a first outer surface; a second outer surface disposed on the opposite side of the first outer surface; and a third outer surface connecting the first outer surface and the second outer surface, wherein the connecting unit of the lens barrel includes a groove formed in the second outer surface, and wherein at least a portion of the second elastic member can be inserted into the groove in the second outer surface of the connecting unit.

[0026] Furthermore, the connecting unit includes a protrusion projecting from the first outer surface of the connecting unit, the second elastic member includes a hole formed at a position corresponding to the protrusion of the connecting unit, and the protrusion of the connecting unit can pass through the hole of the second elastic member.

[0027] In addition, it includes a groove formed in a "V" shape in the connecting unit, and the first portion of the first elastic member can be formed in a shape corresponding to the groove of the connecting unit of the lens barrel.

[0028] Furthermore, the lens barrel includes a protrusion that protrudes from the outer peripheral surface of the main body unit of the lens barrel and is located on the opposite side of the connecting unit, and a pin may be disposed in the protrusion for guiding the movement of the lens barrel in the optical axis direction.

[0029] Furthermore, the housing includes an upper plate unit and a side plate unit, the side plate unit extending from the upper plate unit; the lens barrel includes a first lens barrel and a second lens barrel, the first lens barrel being disposed below the upper plate unit of the housing, and the second lens barrel being disposed below the first lens barrel; the lens barrel includes a first lens, a second lens, and a third lens, the first lens being connected to the upper plate unit of the housing, the second lens being connected to the first lens barrel, and the third lens being connected to the second lens barrel; and the second lens and the third lens are capable of moving independently.

[0030] Furthermore, the second lens and the third lens can move along the optical axis, and the moving distance of the second lens can be different from the moving distance of the third lens.

[0031] The optical device according to the present invention includes: a main body; a camera module disposed on the main body; and a display disposed in the main body and outputting images captured by the camera module.

[0032] The camera module according to this embodiment includes: a housing; a lens barrel disposed in the housing; a first elastic member and a second elastic member connected to the lens barrel; and a piezoelectric motor including a column disposed between the first elastic member and the second elastic member, wherein the first elastic member and the second elastic member compress the column of the piezoelectric motor, wherein the lens barrel includes a main body unit and a connecting unit, the connecting unit being connected to the main body unit, wherein the second elastic member is connected to a groove of the connecting unit by a hook shape on one side of the second elastic member, and is connected to a protrusion of the connecting unit by an opening shape on the other side of the second elastic member.

[0033] Furthermore, the surface connecting one side and the other side of the second elastic member may include a flat surface or a curved surface that is at least partially curved.

[0034] Beneficial effects

[0035] This embodiment provides a lens driving device that includes an elastic member for using strong pressure to compress and fix the lens driving device using a piezoelectric motor.

[0036] In addition, this elastic member can keep the pressure applied to the piezoelectric motor constant.

[0037] Furthermore, the structure of this elastic component can be simplified, thereby improving miniaturization and assemblability. Attached Figure Description

[0038] Figure 1 This is a perspective view of the camera module according to this embodiment.

[0039] Figure 2 This is a front view after the upper plate unit of the camera module according to this embodiment has been removed.

[0040] Figure 3 It is along Figure 2 A sectional view taken along line A-A'.

[0041] Figure 4 This is a perspective view of the camera module after the side panel unit has been removed according to this embodiment.

[0042] Figure 5 This is an exploded perspective view of the camera module according to this embodiment.

[0043] Figure 6 This is a perspective view of the first lens barrel of the camera module according to this embodiment.

[0044] Figure 7yes Figure 6 An exploded 3D diagram.

[0045] Figure 8 This is a side view of the second lens barrel of the camera module according to this embodiment.

[0046] Figure 9 yes Figure 8 An exploded 3D diagram.

[0047] Figure 10 This is a perspective view of the first lens barrel of the camera module according to this embodiment, shown from another angle.

[0048] Figure 11 This is a perspective view of the second lens barrel of the camera module according to this embodiment, shown from another angle.

[0049] Figures 12 to 14 This is a view relating to the first piezoelectric motor, the first elastic member, and the second elastic member of the camera module according to this embodiment.

[0050] Figure 15 This is a perspective view of the first and second elastic members of the camera module according to this embodiment.

[0051] Figure 16 yes Figure 15 An exploded 3D diagram.

[0052] Figure 17 This is a view of the first piezoelectric motor, the first elastic member, and the second elastic member of the camera module according to a modified embodiment of this embodiment.

[0053] Figure 18 This is a perspective view of the first and second elastic members of the camera module according to a modified embodiment of this embodiment.

[0054] Figure 19 yes Figure 18 An exploded 3D diagram. Detailed Implementation

[0055] In the following, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0056] However, the technical concept of the present invention is not limited to the embodiments to be described, but can be implemented in various forms, and within the scope of the technical concept of the present invention, one or more constituent elements can be selectively combined or substituted among embodiments.

[0057] Furthermore, unless explicitly defined and described, the terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted in the sense that would be generally understood by those skilled in the art, and common terms (such as terms defined in dictionaries) may be interpreted in the context of the relevant art.

[0058] Furthermore, the terminology used in this specification is for describing embodiments and is not intended to limit the invention.

[0059] In this specification, the singular form may include the plural form unless otherwise specified in the phrase, and when described as “at least one of A, B and C” (or more than one), this may include one or more of all combinations that can be combined with A, B and C.

[0060] Furthermore, when describing components of embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are merely intended to distinguish some components from others, and they do not limit the nature, order, or sequence of these components.

[0061] Furthermore, when a component is described as “connected,” “linked,” or “interconnected” to another component, the component is not only directly connected, linked, or interconnected to the other component, but may also include cases where the component is “connected,” “linked,” or “interconnected” through another component between the component and the other component.

[0062] Furthermore, when described as being formed or arranged "above" or "below" in each component, "above" or "below" means not only that the two components are in direct contact, but also that one or more additional components are formed or arranged between the two components. Additionally, when expressed as "above" or "below," it can include the meaning of an upward or downward direction based on a component.

[0063] As used below, “optical axis direction” is defined as the optical axis direction of the image sensor and / or lens connected to the lens drive device.

[0064] The term "vertical direction" as used below can refer to a direction parallel to the optical axis. The vertical direction can correspond to the "Z-axis direction." The term "horizontal direction" as used below can refer to a direction perpendicular to the vertical direction. That is, the horizontal direction can be perpendicular to the optical axis. Therefore, the horizontal direction can include both the "X-axis direction" and the "Y-axis direction."

[0065] The term "autofocus (AF) function" as used below is defined as follows: It automatically focuses on the image sensor by adjusting the distance to the object by moving the lens along the optical axis based on the object's distance, enabling the image sensor to obtain a sharp image of the object. Furthermore, "closed-loop autofocus (CLAF) control" is defined as providing real-time feedback control of the lens position by sensing the distance between the image sensor and the lens, thereby improving the accuracy of focus adjustment.

[0066] The term "Optical Image Stabilization (OIS)" as used below is defined as the function of moving or tilting the lens in a direction perpendicular to the optical axis to eliminate vibrations (movements) generated in the image sensor by external forces.

[0067] The construction of the camera module according to this embodiment will be described below with reference to the accompanying drawings.

[0068] Figure 1 This is a perspective view of the camera module according to this embodiment; Figure 2 This is a front view after the upper plate unit of the camera module has been removed according to this embodiment; Figure 3 It is along Figure 2 A sectional view taken along line A-A'; Figure 4 This is a perspective view of the camera module with the side panel unit removed according to this embodiment; Figure 5 This is an exploded perspective view of the camera module according to this embodiment; Figure 6 This is a perspective view of the first lens barrel of the camera module according to this embodiment; Figure 7 yes Figure 6 Exploded 3D diagram; Figure 8 This is a side view of the second lens barrel of the camera module according to this embodiment; Figure 9 yes Figure 8 Exploded 3D diagram; Figure 10 This is a perspective view of the first lens barrel of the camera module according to this embodiment, shown from another angle; Figure 11 This is a perspective view of the second lens barrel of the camera module according to this embodiment, shown from another angle; Figures 12 to 14 This is a view relating to the first piezoelectric motor, the first elastic member, and the second elastic member of the camera module according to this embodiment; Figure 15 This is a perspective view of the first and second elastic members of the camera module according to this embodiment; Figure 16 yes Figure 15 Exploded 3D diagram; Figure 17 This is a view of the first piezoelectric motor, the first elastic member, and the second elastic member of the camera module according to a modified embodiment of this embodiment; Figure 18 This is a perspective view of the first and second elastic members of the camera module according to a modified embodiment of this embodiment; and Figure 19 yes Figure 18 An exploded 3D diagram.

[0069] The camera module 10 may include a housing. The housing may be a cover member. The housing may form the appearance of the camera module 10. The housing may have a hexahedral shape. A lens barrel may be disposed inside the housing. Inside the housing, at least one of the following may be accommodated: a first lens barrel 200, a second lens barrel 300, a first piezoelectric motor 400, a second piezoelectric motor 500, a first pin 610, and a second pin 620.

[0070] The housing may include an upper plate unit 110. The upper plate unit 110 may be a lens barrel for receiving a first lens 140. The upper plate unit 110 may have a hexahedral shape with an open lower surface. The upper plate unit 110 may include a hole 111. The upper plate unit 110 may receive the first lens 140. The first lens 140 may be disposed in the hole 111 of the upper plate unit 110. The upper plate unit 110 may include: an upper plate 112; a side plate 113 extending downward from the upper plate 112; and a cylindrical unit 114 projecting upward from the upper plate 112. The cylindrical unit 114 may receive the first lens 140 therein.

[0071] The upper plate unit 110 may include a first protrusion 115 that protrudes upward from the upper plate 112. The first protrusion 115 may secure the first piezoelectric motor 400. The first protrusion 115 may include a hole. A first post 410 of the first piezoelectric motor 400 may be disposed in the hole of the first protrusion 115. In this case, at least a portion of the first post 410 of the first piezoelectric motor 400 may protrude upward further than the first protrusion 115. The upper plate unit 110 may include a second protrusion 116 that protrudes upward from the upper plate 112.

[0072] The upper plate unit may include a second protrusion 116, which protrudes upward from the upper plate 112. The second protrusion 116 may be spaced apart from the first protrusion 115. The cylindrical unit 114 may be disposed between the first protrusion 115 and the second protrusion 116. The second protrusion 116 may secure the second piezoelectric motor 500. The second protrusion 116 may include a hole. A second post of the second piezoelectric motor 500 may be disposed in the hole of the second protrusion 116. In this case, at least a portion of the second post of the second piezoelectric motor 500 may protrude upward further than the second protrusion 116.

[0073] The housing may include a side plate unit 120. The side plate unit 120 may have a hexahedral shape with open upper and lower surfaces. The side plate unit 120 may extend downward from the outer periphery or outer edge of the upper plate unit 110. The side plate unit 120 may be coupled to the upper plate unit 110. The side plate unit 120 may be coupled to a side plate 113 of the upper plate unit 110. The side plate unit 120 may connect the upper plate unit 110 and the lower plate unit 130.

[0074] The housing may include a lower plate unit 130. The lower plate unit 130 may be disposed on the opposite side of the upper plate unit 110. The lower plate unit 130 may be a lens barrel for accommodating a fourth lens. The lower plate unit 130 may include a first hole. The fourth lens may be disposed in the first hole of the lower plate unit 130. The lower plate unit 130 may include a second hole. The second hole may be used to fix the first piezoelectric motor 400. The lower end of the first column 410 of the first piezoelectric motor 400 may be disposed in the second hole. A retaining member 134 may be disposed in the second hole, and the retaining member 134 is used to fix the lower end of the first column 410 of the first piezoelectric motor 400. The lower plate unit 130 may include a third hole. The third hole may be used to fix the second piezoelectric motor 500. The lower end of the second column of the second piezoelectric motor 500 may be disposed in the third hole. The retaining member 134 may be disposed in the third hole, and the retaining member 134 is used to fix the lower end of the second column of the second piezoelectric motor 500. The retaining member 134 may be formed of a rubber material.

[0075] The camera module 10 according to this embodiment may include a first lens 140. The first lens 140 may be a lens group comprising multiple lenses. The first lens 140 may include spacers disposed between the multiple lenses. The first lens 140 may be disposed in the upper plate unit 110 of the housing. The first lens 140 may be disposed in a hole 111 of the upper plate unit 110 of the housing. The first lens 140 may be connected to a cylindrical unit 114 of the upper plate unit 110 of the housing. The position of the first lens 140 may be fixed. The first lens 140 may not move in the optical axis direction. The optical axis direction of the first lens 140 may be consistent with the optical axis direction of the second to fourth lenses.

[0076] The camera module 10 according to this embodiment may include a fourth lens 150. The fourth lens 150 may be a lens group comprising multiple lenses. The fourth lens 150 may include spacers disposed between the multiple lenses. The fourth lens 150 may be disposed in the lower plate unit 130 of the housing. The fourth lens 150 may be disposed in a first hole in the lower plate unit 130 of the housing. The fourth lens 150 may have a fixed position. The fourth lens 150 may not move in the optical axis direction. The optical axis direction of the fourth lens 150 may be consistent with the optical axis directions of the first lens 140, the second lens 240, and the third lens 340.

[0077] The camera module 10 according to this embodiment may include a first lens barrel 200. The first lens barrel 200 may be disposed inside the housing. The first lens barrel 200 may be disposed below the upper plate unit 110 of the housing. The first lens barrel 200 may be disposed inside the side plate unit 120 of the housing. The second lens 240 may be disposed in the first lens barrel 200. The first lens barrel 200 may be movable in the optical axis direction. The first lens barrel 200 may be movable in the optical axis direction to perform autofocus. Alternatively, the first lens barrel 200 may be movable in the optical axis direction to perform zoom. The first lens barrel 200 may be coupled to the first piezoelectric motor 400. The first lens barrel 200 may be coupled to the first piezoelectric motor 400 via a first elastic member and a second elastic member.

[0078] The first lens barrel 200 may include a main body unit 210. Hereinafter, the main body unit 210 of the first lens barrel 200 may refer to a first main body unit 210. The first main body unit 210 may have a cylindrical shape with open upper and lower surfaces. The first main body unit 210 may include a hole 211. The second lens 240 may be disposed in the hole 211 of the first main body unit 210. The second lens 240 may be coupled inside the main body unit 210. The first main body unit 210 may be connected to a first coupling unit 220. The first main body unit 210 may be integrally formed with the first coupling unit 220. However, the invention is not limited thereto, and the first main body unit 210 may be formed separately from the first coupling unit 220.

[0079] The first lens barrel 200 may include a coupling unit 220. Hereinafter, the coupling unit 220 of the first lens barrel 200 may refer to the first coupling unit 220. The first coupling unit 220 may protrude from the outer peripheral surface of the first body unit 210. The first coupling unit 220 may be connected to the first body unit 210.

[0080] The first connecting unit 220 may include: a first outer surface 221; a second outer surface 222 disposed on the opposite side of the first outer surface 221; and a third outer surface 223 connecting the first outer surface 221 and the second outer surface 222.

[0081] The first connecting unit 220 may include a first groove 224 into which one side of the first elastic member 710 is inserted. The first groove 224 may be formed in the third outer surface 223 of the first connecting unit 220. The first groove 224 may be connected to a third groove 226, described later. The first groove 224 may open toward the third groove 226 of the first connecting unit 220. The first groove 224 may be formed in a region protruding from the third outer surface 223 of the first connecting unit 220. The bottom surface of the first groove 224 may form the same plane as the third outer surface 223 of the first connecting unit 220. A third portion 713 of the first elastic member 710 may be disposed in the first groove 224. The length of the first groove 224 in the optical axis direction may be the same as the length of the third portion 713 of the first elastic member 710 in the corresponding direction. Thus, the first elastic member 710 and the first connecting unit 220 can be assembled. Thus, the first elastic member 710 can be securely fixed to the first connecting unit 220. The length of the first groove 224 in the optical axis direction can be the same as the length of the protrusion 229 of the first connecting unit 220 in the optical axis direction.

[0082] The first connecting unit 220 may include a second groove 225 into which the other side of the first elastic member 710 is inserted. The second groove 225 may be formed in a third outer surface 223 of the first connecting unit 220. The second groove 225 may be connected to a third groove 226 of the first connecting unit 220. The second groove 225 may open toward the third groove 226 of the first connecting unit 220. The second groove 225 may be connected to a fourth groove 227 of the first connecting unit 220. The second groove 225 may open toward the fourth groove 227 of the first connecting unit 220. The second groove 225 may be connected to the inner surface of the fourth groove 227 of the first connecting unit 220. At least a portion of the second groove 225 may overlap with a fifth groove 228 of the first connecting unit 220 in a direction perpendicular to the optical axis. At least a portion of the second groove 225 may overlap with two fifth grooves 228 in a direction perpendicular to the optical axis. The second groove 225 can be formed in the region protruding from the third outer surface 223 of the first connecting unit 220. The bottom surface of the second groove 225 can form the same plane as the third outer surface 223 of the first connecting unit 220. The length of the second groove 225 in the optical axis direction can be the same as the length of the second portion 712 of the first elastic member 710 in the corresponding direction. Thus, the first elastic member 710 and the first connecting unit 220 can be assembled. Thus, the first elastic member 710 can be securely fixed to the first connecting unit 220.

[0083] The first connecting unit 220 may include a groove 226. Hereinafter, the groove 226 of the first connecting unit 220 may be a third groove 226. The third groove 226 may be formed in the third outer surface 223. The third groove 226 may be formed by recessing from the third outer surface 223. The third groove 226 may be formed in a "V" shape. The third groove 226 may include an inclined surface formed at an angle relative to the third outer surface 223. The inclined surface of the third groove 226 may include two inclined surfaces. These two inclined surfaces may have different inclination directions. The first elastic member 710 may be disposed in the third groove 226. The first column 410 of the first piezoelectric motor 400 may be disposed in the third groove 226.

[0084] The first connecting unit 220 may include a groove 227. Hereinafter, the groove 227 of the first connecting unit 220 may refer to a fourth groove 227. The fourth groove 227 may be formed in the third outer surface 223 of the first connecting unit 220. The fourth groove 227 may be formed by recessing into the third outer surface 223 of the connecting unit 220. The fourth groove 227 may be spaced apart from the third groove 226. One side of the second elastic member 720 may be disposed in the fourth groove 227. The fourth groove 227 may be connected to one side of the second elastic member 720.

[0085] The fourth groove 227 may include a groove 228. Hereinafter, groove 228 may refer to a fifth groove 228. The fifth groove 228 may be formed on the inner surface of the fourth groove 227. The inner surface of the fourth groove 227 may be disposed on the opposite side of the first outer surface 221 of the first connecting unit 220. The inner surface of the fourth groove 227 may be disposed between the first outer surface 221 and the second outer surface 222 of the first connecting unit 220. At least a portion of one side of the second elastic member 720 may be disposed in the fifth groove 228. At least a portion of one side of the second elastic member 720 and at least a portion of one side of the fifth groove 228 may be hooked together. The fifth groove 228 may be configured such that at least a portion of one side of the second elastic member 720 is engaged. The fifth groove 228 may include two fifth grooves 228-1 and 228-2, which are spaced apart from each other in the optical axis direction. At least a portion of one side of the second elastic member 720 may be disposed in each of the two fifth grooves 228-1 and 228-2.

[0086] The first connecting unit 220 may include a protrusion 229. The protrusion 229 may protrude from a first outer surface 221 of the first connecting unit 220. The protrusion 229 may be connected to the other side of the second elastic member 720. The protrusion 229 may pass through a hole 721-1 formed on the other side of the second elastic member 720. The protrusion 229 may be connected to the other side of the second elastic member 720 in a snap-fit ​​manner. The protrusion 229 may protrude outward from the other side of the second elastic member 720. This prevents the second elastic member 720 from separating.

[0087] The first lens barrel 200 may include a first protrusion 230. The first protrusion 230 may protrude from the outer peripheral surface of the first main body unit 210. The first protrusion 230 may be spaced apart from the first connecting unit 220. The first protrusion 230 may be spaced apart from the first connecting unit 220 in the circumferential direction of the first main body unit 210. The first protrusion 230 may be disposed on the opposite side of the first connecting unit 220 relative to the optical axis direction. A first pin 600 may be disposed in the first protrusion 230. Thus, the first lens barrel 200 may move along the first pin 610 in the optical axis direction. The first lens barrel 200 may move along the first pin 610 and the second pin 620 in the optical axis direction.

[0088] The first lens barrel 200 may include a second lens 240. The second lens 240 may be a lens group comprising multiple lenses. The second lens 240 may include spacers disposed between the multiple lenses. The second lens 240 is movable in the optical axis direction. The second lens 240 may be movable independently relative to the third lens 340. When the second lens 240 is an autofocus lens, the third lens 340 may be a zoom lens. Conversely, when the second lens 240 is a zoom lens, the third lens 340 may be an autofocus lens. The movable distance of the second lens 240 may differ from the movable distance of the third lens 340.

[0089] The first lens barrel 200 may include a groove 260. The groove 260 may be formed in the first connecting unit 220. The groove 260 may be formed in the second outer surface 222 of the first connecting unit 220. The groove 260 may be recessed from the second outer surface 222 of the first connecting unit 220. At least a portion of the groove 260 may communicate with a fourth groove 227 of the first connecting unit 220. A first sensor assembly 250, described later, may be disposed in the groove 260. A first magnetic scale 251 of the first sensor assembly 250, described later, may be disposed in the groove 260. The length of the groove 260 in the optical axis direction may correspond to the length of the first magnetic scale 251 in the optical axis direction. The width of the groove 260 in a first direction perpendicular to the optical axis direction may include a region formed to correspond to the width of the first magnetic scale 251 in the first direction and a region formed to be longer than the width of the first magnetic scale 251 in the first direction. Thus, the assembly of the first magnetic scale 251 can be facilitated.

[0090] The camera module 10 may include a first sensor assembly 250. The first sensor assembly 250 may include a magnetoresistive sensor (MR sensor). The first sensor assembly 250 may include a giant magnetoresistive sensor (GMR sensor). The first sensor assembly 250 can detect the position and movement of the second lens 240.

[0091] The first sensor assembly 250 may include a first magnetic scale 251. The first magnetic scale 251 may be disposed within the first lens barrel 200. The first magnetic scale 251 may be disposed within the first connection unit 220. The first magnetic scale 251 may include a magnet. The first magnetic scale 251 may include multiple magnets. In the first magnetic scale 251, the N pole and S pole may be arranged to cross each other. In the first magnetic scale 251, the N pole and S pole may be arranged alternately. The first magnetic scale 251 may move along the optical axis together with the first lens barrel 200.

[0092] The first sensor assembly 250 may include a first sensor 252. The first sensor 252 may be disposed within the housing. The first sensor 252 may be disposed in a side panel unit 120 of the housing. The first sensor 252 may face the first magnetic scale 251. The first sensor 252 may be positioned spaced apart from the first magnetic scale 251 in a direction perpendicular to the optical axis. The first sensor 252 can identify the position of the first magnetic scale 251. Thus, the position of the first lens barrel 200, which moves together with the first magnetic scale 251, can be identified.

[0093] The camera module 10 according to this embodiment may include a second lens barrel 300. The second lens barrel 300 may be disposed inside the housing. The second lens barrel 300 may be disposed below the first lens barrel 200 of the housing. The second lens barrel 300 may be disposed inside the side plate unit 120 of the housing. A third lens 340 may be disposed inside the second lens barrel 300. The second lens barrel 300 may be movable in the optical axis direction. The second lens barrel 300 may be movable in the optical axis direction to perform autofocus. Alternatively, the second lens barrel 300 may be movable in the optical axis direction to perform zoom. The second lens barrel 300 may be coupled to the second piezoelectric motor 500. The second lens barrel 300 may be coupled to the second piezoelectric motor 500 via a third elastic member 810 and a fourth elastic member 820.

[0094] The second lens barrel 300 may include a second main body unit 310. The second main body unit 310 may be a cylindrical shape with open upper and lower surfaces. The second main body unit 310 may include a hole 311. The third lens 340 may be disposed in the hole 311 of the second main body unit 310. The third lens 340 may be connected inside the second main body unit 310.

[0095] The second lens barrel 300 may include a coupling unit 320. Hereinafter, the coupling unit 320 of the second lens barrel 300 may refer to a second coupling unit 320. The second coupling unit 320 may protrude from the outer peripheral surface of the second body unit 310. The second coupling unit 320 may be connected to the second body unit 310.

[0096] The second connecting unit 320 may include: a first outer surface 321; a second outer surface 322 disposed on the opposite side of the first outer surface 321; and a third outer surface 323 connecting the first outer surface 321 and the second outer surface 322.

[0097] The second connecting unit 320 may include a first groove 324 into which one side of the third elastic member 810 is inserted. The first groove 324 may be formed in the third outer surface 323 of the second connecting unit 320. The first groove 324 may be connected to a third groove 326, described later. The first groove 324 may open toward the third groove 326 of the second connecting unit 320. The first groove 324 may be formed in a region protruding from the third outer surface 323 of the second connecting unit 320. The bottom surface of the first groove 324 may form the same plane as the third outer surface 323 of the second connecting unit 320. A third portion 813 of the third elastic member 810 may be disposed in the first groove 324. The length of the first groove 324 in the optical axis direction may be the same as the length of the third portion 813 of the third elastic member 810 in the corresponding direction. Thus, the third elastic member 810 and the second connecting unit 320 can be assembled and connected. Thus, the third elastic member 810 can be securely fixed to the second connecting unit 320. The length of the first groove 324 in the optical axis direction can be the same as the length of the protrusion 329 of the second connecting unit 320 in the optical axis direction.

[0098] The second connecting unit 320 may include a second groove 325 into which the other side of the third elastic member 810 is inserted. The second groove 325 may be formed in the third outer surface 323 of the second connecting unit 320. The second groove 325 may be connected to the third groove 326 of the second connecting unit 320. The second groove 325 may open toward the third groove 326 of the second connecting unit 320. The second groove 325 may be connected to the fourth groove 327 of the second connecting unit 320. The second groove 325 may open toward the fourth groove 327 of the second connecting unit 320. The second groove 325 may be connected to the inner surface of the fourth groove 327 of the second connecting unit 320. At least a portion of the second groove 325 may overlap with a fifth groove 328 of the second connecting unit 320 in a direction perpendicular to the optical axis. At least a portion of the second groove 325 may overlap with two fifth grooves 328 in a direction perpendicular to the optical axis. The second groove 325 can be formed in the region protruding from the third outer surface 323 of the second connecting unit 320. The bottom surface of the second groove 325 can form the same plane as the third outer surface 323 of the second connecting unit 320. The length of the second groove 325 in the optical axis direction can be the same as the length of the second portion 812 of the third elastic member 810 in the corresponding direction. Thus, the third elastic member 810 and the second connecting unit 320 can be assembled and connected. Thus, the third elastic member 810 can be firmly fixed to the second connecting unit 320.

[0099] The second connecting unit 320 may include a groove 326. Hereinafter, the groove 326 of the second connecting unit 320 may refer to a third groove 326. The third groove 326 may be formed in the third outer surface 323. The third groove 326 may be formed by recessing from the third outer surface 323. The third groove 326 may be formed in a "V" shape. The third groove 326 may include an inclined surface formed at an angle relative to the third outer surface 323. The inclined surface of the third groove 326 may include two inclined surfaces. These two inclined surfaces may have different inclination directions. The third elastic member 810 may be disposed in the third groove 326. The second column of the second piezoelectric motor 500 may be disposed in the third groove 326.

[0100] The second connecting unit 320 may include a groove 327. Hereinafter, the groove 327 of the second connecting unit 320 may refer to a fourth groove 327. The fourth groove 327 may be formed in the third outer surface 323 of the second connecting unit 320. The fourth groove 327 may be formed by recessing into the third outer surface 323 of the second connecting unit 320.

[0101] The fourth groove 327 may include a plurality of grooves 328. Hereinafter, the groove 328 may refer to a fifth groove 328. The fifth groove 328 may be formed in the inner surface of the fourth groove 327. The inner surface of the fourth groove 327 may be disposed on the opposite side of the first outer surface 321 of the second connecting unit 320. The inner surface of the fourth groove 327 may be disposed between the first outer surface 321 and the second outer surface 322 of the second connecting unit 320. At least a portion of one side of the fourth elastic member 820 may be disposed in the fifth groove 328. At least a portion of one side of the fifth groove 328 and the fourth elastic member 820 may be hook-engaged. The fifth groove 328 may be configured such that at least a portion of one side of the fourth elastic member 820 is engaged. The fifth groove 328 may include two fifth grooves 328-1 and 328-2, which are spaced apart from each other in the optical axis direction. At least a portion of one side of the fourth elastic member 820 may be disposed in each of the two fifth grooves 328-1 and 328-2.

[0102] The second connecting unit 320 may include a protrusion 329. The second connecting unit 320 may protrude from the first outer surface 321 through the protrusion 329. The protrusion 329 may be connected to the other side of the fourth elastic member 820. The protrusion 329 may pass through a hole 821-1 formed on the other side of the fourth elastic member 820. The protrusion 329 may be connected to the other side of the fourth elastic member 820 in a snap-fit ​​manner. The protrusion 329 may protrude further outward than the other side of the fourth elastic member 820. This prevents separation of the fourth elastic member 820.

[0103] The second connecting unit 320 may include a groove 326 formed in the third outer surface 323. The groove 326 may be V-shaped. The groove 326 may include an inclined surface formed at an angle relative to the third outer surface 323. The inclined surface of the groove 326 may include two inclined surfaces. These two inclined surfaces may have different inclination directions. The third elastic member 810 may be disposed in the groove 326. The second column of the second piezoelectric motor 500 may be disposed in the groove 326.

[0104] The second lens barrel 300 may include a second protrusion 330. The second protrusion 330 may protrude from the outer peripheral surface of the second main body unit 310. The second protrusion 330 may be spaced apart from the second connecting unit 320. The second protrusion 330 may be spaced apart from the second connecting unit 320 in the circumferential direction of the second main body unit 310. The second protrusion 330 may be disposed on the opposite side of the second connecting unit 320 relative to the optical axis direction. A first pin 610 may be disposed in the second protrusion 330. Thus, the second lens barrel 300 may move along the first pin 610 in the optical axis direction. The second lens barrel 300 may move along the first pin 610 and the second pin 620 in the optical axis direction.

[0105] The second lens barrel 300 may include a third lens 340. The third lens 340 may be disposed within the second main body unit 310 of the second lens barrel 300. The third lens 340 may be a lens group comprising multiple lenses. The third lens 340 may include spacers disposed between the multiple lenses. The third lens 340 may be movable in the optical axis direction. The third lens 340 may be movable independently relative to the second lens 240. When the third lens 340 is an autofocus lens, the second lens 240 may be a zoom lens. Conversely, when the third lens 340 is a zoom lens, the second lens 240 may be an autofocus lens. The movable distance of the third lens 340 may be different from the movable distance of the second lens 240.

[0106] The second lens barrel 300 may include a groove 360. The groove 360 ​​may be formed in the second connecting unit 320. The groove 360 ​​may be formed in the second outer surface 322 of the second connecting unit 320. The groove 360 ​​may be recessed from the second outer surface 322 of the second connecting unit 320. At least a portion of the groove 360 ​​may communicate with a fourth groove 327 of the second connecting unit 320. The second sensor assembly 350, described later, may be disposed in the groove 360. The second magnetic scale 351 of the second sensor assembly 350, described later, may be disposed in the groove 360. The length of the groove 360 ​​in the optical axis direction may correspond to the length of the second magnetic scale 351 in the optical axis direction. The width of the groove 360 ​​in a first direction perpendicular to the optical axis direction may include a region formed to correspond to the width of the second magnetic scale 351 in the first direction and a region formed to be longer than the width of the second magnetic scale 351 in the first direction. Thus, the assembly of the second magnetic scale 351 can be facilitated.

[0107] The camera module 10 may include a second sensor assembly 350. The second sensor assembly 350 may include a magnetoresistive sensor (MR sensor). The second sensor assembly 350 may include a giant magnetoresistive sensor (GMR sensor). The second sensor assembly 350 can detect the position and movement of the third lens 340.

[0108] The second sensor assembly 350 may include a second magnetic scale 351. The second magnetic scale 351 may be disposed within the second lens barrel 300. The second magnetic scale 351 may be disposed within the second coupling unit 320. The second magnetic scale 351 may include magnets. The second magnetic scale 351 may include multiple magnets. In the second magnetic scale 351, the N pole and S pole may be arranged to cross each other. In the second magnetic scale 351, the N pole and S pole are arranged alternately. The second magnetic scale 351 may move along the optical axis together with the second lens barrel 300.

[0109] The second sensor assembly 350 may include a second sensor 352. The second sensor 352 may be disposed within the housing. The second sensor 352 may be disposed in a side panel unit 120 of the housing. The second sensor 352 may face the second magnetic scale 351. The second sensor 352 may be positioned spaced apart from the second magnetic scale 351 in a direction perpendicular to the optical axis. The second sensor 352 can detect the position of the second magnetic scale 351. Thus, the position of the second lens barrel 300, which moves together with the second magnetic scale 351, can be detected.

[0110] The camera module 10 according to this embodiment may include a first piezoelectric motor 400. The first piezoelectric motor 400 may be disposed in a housing. The first piezoelectric motor 400 may be coupled to a first lens barrel 200. The first piezoelectric motor 400 may cause the first lens barrel 200 to move in the optical axis direction. The first piezoelectric motor 400 may be an ultrasonic motor.

[0111] The first piezoelectric motor 400 may include a first post 410. The first post 410 may be connected to the first lens barrel 200. The first post 410 may be fixed to the first lens barrel 200 by a first elastic member and a second elastic member. When the first lens barrel 200 moves in the optical axis direction, the first post 410 may remain stationary. The upper end of the first post 410 may be disposed in the upper plate unit 110 of the housing. The upper end of the first post 410 may be disposed in the hole 111 of the upper plate unit 110 of the housing. The upper end of the first post 410 may be fixed by the retaining member 134. The other end of the first post 410 may be disposed in the lower plate unit 130 of the housing. The other end of the first post 410 may be disposed in the second hole of the lower plate unit 130 of the housing. The other end of the first post 410 may pass through the second hole of the lower plate unit 130 of the housing to protrude outside the lower plate unit 130. The lower end of the first post 410 may be connected to the first piezoelectric element 420. The lower end of the first post 410 can be fixed to the first piezoelectric element 420 using an adhesive. The adhesive may include an epoxy resin-based adhesive. The first post 410 may include a carbon rod. The first post 410 can receive vibrations generated from the first piezoelectric element 420 to move the first lens barrel 200 in the optical axis direction. The first post 410 may extend parallel to the optical axis direction. The first post 410 may be disposed in the first connecting unit 220 of the first lens barrel 200. The first post 410 may be disposed between the first elastic member and the second elastic member.

[0112] The first post 410 can transmit the vibration generated from the first piezoelectric element 420 to the first lens barrel 200. At this time, the first lens barrel 200 can move upward or downward depending on the direction of movement of the first post 410. Consequently, the second lens 240 in the first lens barrel 200 is moved together, and a zoom function (magnification or reduction) or an autofocus function can be performed. The first post 410 can contract or extend by the vibration generated from the first piezoelectric element 420. The first post 410 can transmit vibration in an upward or downward direction depending on the direction of the applied voltage.

[0113] The first piezoelectric motor 400 may include a first piezoelectric element 420. The first piezoelectric element 420 may be disposed in the lower plate unit 130 of the housing. The first piezoelectric element 420 may be disposed in a second hole in the lower plate unit 130 of the housing. The first piezoelectric element 420 may contract or extend by a voltage applied from the first substrate 430. The first piezoelectric element 420 may receive voltage from the first substrate 430. The first piezoelectric element 420 may contract or extend along the optical axis. The first piezoelectric element 420 may contract or extend in its longitudinal direction depending on the direction of the applied voltage. The first piezoelectric element 420 may generate vibration by contraction or extension.

[0114] The first piezoelectric motor 400 may include a first substrate 430. The first substrate 430 may include a flexible printed circuit board. The first substrate 430 may be electrically connected to the first piezoelectric element 420. The first substrate 430 may apply power to the first piezoelectric element 420. The first substrate 430 may include a first portion 431 disposed within the first piezoelectric element 420 and a second portion 432 disposed below the first piezoelectric element 420. The first substrate 430 may protrude outwards from the housing.

[0115] The first piezoelectric motor 400 may include a first buffer member 440. The first buffer member 440 may be disposed within the first post 410. The first buffer member 440 may surround the lower end of the first post 410. The first buffer member 440 may be disposed in the second hole of the lower plate unit 130. The first buffer member 440 can prevent noise caused by vibration of the first post 410. The first buffer member 440 and the retaining member 134 together can prevent the first post 410 from deforming or being damaged due to external impact.

[0116] The camera module 10 according to this embodiment may include a second piezoelectric motor 500. The second piezoelectric motor 500 may be disposed within the housing. The second piezoelectric motor 500 may be coupled to the second lens barrel 300. The second piezoelectric motor 500 may move the second lens barrel 300 in the optical axis direction. The second piezoelectric motor 500 may be an ultrasonic motor.

[0117] The second piezoelectric motor 500 may include a second column. The second column can be coupled to the second lens barrel 300. The second column can be fixed to the second lens barrel 300 by a third elastic member 810 and a fourth elastic member 820. When the second lens barrel 300 moves in the optical axis direction, the second column may remain stationary. The upper end of the second column can be disposed in the upper plate unit 110 of the housing. The upper end of the second column can be disposed in the hole 111 of the upper plate unit 110 of the housing. The upper end of the second column can be fixed by the retaining member 134. The other end of the second column can be disposed in the lower plate unit 130 of the housing. The other end of the second column can be disposed in the third hole of the lower plate unit 130 of the housing. The other end of the second column can pass through the third hole of the lower plate unit 130 of the housing to protrude beyond the lower plate unit 130. The lower end of the second column can be coupled to the second piezoelectric element 520. The lower end of the second column can be fixed to the second piezoelectric element 520 by adhesive. At this time, the adhesive may include an epoxy resin adhesive. The second post may include a carbon rod. The second post may receive vibrations generated from the second piezoelectric element 520 to move the second lens barrel 300 in the optical axis direction. The second post may extend parallel to the optical axis direction. The second post may be disposed in the first connecting unit 220 of the second lens barrel 300. The second post may be disposed between the third elastic member 810 and the fourth elastic member 820.

[0118] The second column can transmit the vibration generated from the first piezoelectric element 420 to the second lens barrel 300. At this time, the second lens barrel 300 can move upwards or downwards depending on the direction of movement of the second column. Consequently, the second lens 240 in the second lens barrel 300 is moved together, and a zoom function (magnification or reduction) or an autofocus function can be performed. The second column can contract or extend by the vibration generated from the first piezoelectric element 420. The second column can transmit vibrations in an upward or downward direction depending on the direction of the applied voltage.

[0119] The second piezoelectric motor 500 may include a second piezoelectric element 520. The second piezoelectric element 520 may be disposed in the lower plate unit 130 of the housing. The second piezoelectric element 520 may be disposed in a third hole in the lower plate unit 130 of the housing. The first piezoelectric element 420 may contract or extend by a voltage applied from the second substrate 530. The first piezoelectric element 420 may receive voltage from the second substrate 530. The first piezoelectric element 420 may contract or extend along the optical axis. The first piezoelectric element 420 may contract or extend in its longitudinal direction depending on the direction of the applied voltage. The first piezoelectric element 420 may generate vibration by contraction or extension.

[0120] The second piezoelectric motor 500 may include a second substrate 530. The second substrate 530 may include a flexible printed circuit board. The second substrate 530 may be electrically connected to the first piezoelectric element 420. The second substrate 530 may apply power to the first piezoelectric element 420. The first substrate 430 may include a first portion 531 disposed above the first piezoelectric element 420 and a second portion 532 disposed below the first piezoelectric element 420. The first substrate 430 may protrude toward the exterior of the housing.

[0121] The second piezoelectric motor 500 may include a first buffer member 540. The first buffer member 540 may be disposed within the second column. The first buffer member 540 may surround the lower end of the second column. The first buffer member 540 may be disposed in the second hole of the lower plate unit 130. The first buffer member 540 can prevent noise caused by vibration of the second column. The first buffer member 540 and the retaining member 134 together can prevent the second column from deforming or being damaged due to external impact.

[0122] The camera module 10 according to this embodiment may include a first pin 610. The first pin 610 may be disposed inside the housing. The first pin 610 may be disposed in the housing parallel to a second pin 620, described later. The first pin 610 may be positioned closer to the first piezoelectric motor 400 than the second pin 620. The first pin 610 may be connected to the upper plate unit 110 of the housing. The upper end of the first pin 610 may be connected to the upper plate unit 110 of the housing. The first pin 610 may be disposed in the first connecting unit 220. The first pin 610 may pass through a hole 270 in the first connecting unit 220. Thus, the first pin 610 may guide the movement of the first lens barrel 200 in the optical axis direction. Thus, the second lens 240 disposed in the first lens barrel 200 may perform a zoom function or an autofocus function. The first pin 610 may be connected to the second lens barrel 300. The first pin 610 may be disposed in the second protrusion 330 of the second lens barrel 300. Therefore, the first pin 610 can guide the movement of the second lens barrel 300 in the optical axis direction. That is, the first pin 610 is disposed in the hole of the first connecting unit 220 of the first lens barrel 200 and the second protrusion 330 of the second lens barrel 300, thereby enabling the first lens barrel 200 and the second protrusion 330 to move in the optical axis direction.

[0123] The camera module 10 according to this embodiment may include a second pin 620. The second pin 620 may be disposed inside the housing. The second pin 620 may be disposed inside the housing parallel to the first post. The second pin 620 may be positioned closer to the second piezoelectric motor 500 than the first pin 610. The second pin 620 may be connected to the upper plate unit 110 of the housing. The upper end of the second pin 620 may be connected to the upper plate unit 110 of the housing. The second pin 620 may be disposed in the second connecting unit 320. The second pin 620 may pass through the hole 370 of the second connecting unit 320. Thus, the second pin 620 may guide the movement of the second lens barrel 300 in the optical axis direction. Thus, the third lens 340 disposed in the second lens barrel 300 may perform a zoom function or an autofocus function. The second pin 620 may be connected to the first lens barrel 200. The second pin 620 may be disposed on the first protrusion 230 of the first lens barrel 200. Therefore, the second pin 620 can guide the movement of the first lens barrel 200 in the optical axis direction. That is, the second pin 620 is disposed on the second connecting unit 320 of the second lens barrel 300 and the first protrusion 230 of the first lens barrel 200, thereby enabling the first lens barrel 200 and the second lens barrel 300 to move in the optical axis direction.

[0124] The camera module 10 according to this embodiment may include a first elastic member 710. The first elastic member 710 can fix the first piezoelectric motor 400 to the first lens barrel 200. The first elastic member 710 may be disposed on the second outer surface 222 of the first connecting unit 220. The first elastic member 710 may be spaced apart from the second elastic member 720. The first elastic member 710 may be spaced apart from the second elastic member 720 in a direction perpendicular to the optical axis.

[0125] The first elastic member 710 may include a first portion 711. The first portion 711 may be formed in a shape corresponding to the groove 224 of the second outer surface 222 of the first connecting unit 220. The first portion 711 may be formed in a "V" shape cross-section. The first portion 711 may include a first inclined surface inclined relative to the second portion 712 and a second inclined surface inclined relative to the third portion 713. The first and second inclined surfaces may be integrally formed. The inclination direction of the first inclined surface may be different from the inclination direction of the second inclined surface. The inclination direction of the first inclined surface may be opposite to the inclination direction of the second inclined surface. The first inclined surface may be disposed between the first portion 711 and the second portion 712. The second inclined surface may be disposed between the first portion 711 and the third portion 713. The first portion 711 may have a first length in the optical axis direction.

[0126] The first elastic member 710 may include a second portion 712. The second portion 712 may extend from one end of the first portion 711 in a direction perpendicular to the optical axis. The second portion 712 may extend from the outer surface of the first portion 711 in a direction perpendicular to the optical axis. The length of the second portion 712 in the optical axis direction may be less than the length of the first portion 711 in the optical axis direction. The second portion 712 may be disposed between two second regions of the second elastic member 720. The second portion 712 may have a second length in the optical axis direction. The second length of the second portion 712 may be less than the second length of the first portion 711. The second portion 712 may extend from the first portion 711. The second portion 712 may have the same length in the optical axis direction as the third portion 713 of the first elastic member 710, which will be described later. The second portion 712 and the third portion 713 may be formed symmetrically with respect to the first portion 711. The second portion 712 may be parallel to the third region 724 of the second elastic member 720.

[0127] The first elastic member 710 may include a third portion 713. The third portion 713 may extend from the other end of the first portion 711 in a direction perpendicular to the optical axis. The third portion 713 may extend from the outer surface of the first portion 711 in a direction perpendicular to the optical axis. The third portion 713 may have a second length in the optical axis direction. The second length of the third portion 713 in the optical axis direction may be less than the first length of the first portion 711 in the optical axis direction. The second length of the third portion 713 in the optical axis direction may be the same as the length of the second portion 712 in the optical axis direction. The third portion 713 may overlap with the second portion 712 in a direction perpendicular to the optical axis direction. The third portion 713 may be disposed in a hole in the first region of the second elastic member 720. The second portion 712 and the third portion 713 may not contact the first post 410 of the first piezoelectric motor 400. The third portion 713 may be parallel to the third region 724 of the second elastic member 720.

[0128] In a modified embodiment, the first elastic member 710 may further include an extension 714. The extension 714 extends from the first portion 711 of the first elastic member 710. The extension 714 may be bent at a first angle relative to the first portion 711 of the first elastic member 710. The surface of the extension 714 facing the first connecting unit 220 may form an acute angle with the first portion 711 of the first elastic member 710. The surface of the extension 714 facing the second elastic member 720 may form an obtuse angle with the first portion 711. The extension 714 may not contact the first post 410 of the first piezoelectric motor 400. Thus, insertion of the first post 410 becomes easier. Furthermore, the first post 410 can be easily press-fitted between the first elastic member 710 and the second elastic member 720, which have high elastic strength. The extension 714 may include a first extension 714-1 extending from a first inclined surface of the first portion 711 and a second extension 714-2 extending from a second inclined surface of the first portion 711. The first extension 714-1 may be at least partially spaced apart from the second extension 714-2. The separation distance between the first extension 714-1 and the second extension 714-2 may increase as they extend upwards. The first extension 714-1 and the second extension 714-2 may not contact the first post 410. The first extension 714-1 and the second extension 714-2 may guide the first post 410 during assembly.

[0129] The camera module 10 according to this embodiment may include a second elastic member 720. The second elastic member 720 may be formed of an elastic material. The second elastic member 720 may be configured to be engaged in a groove 224 on the second outer surface 222 of the first connecting unit 220. The second elastic member 720 may compress the first piezoelectric motor 400 in a direction toward the first lens barrel 200. Thus, the second elastic member 720 may secure the first piezoelectric motor 400 to the first lens barrel 200. The second elastic member 720 is connected to the fifth groove 228 of the first connecting unit 220 via a hook shape on one side, and the second elastic member may be connected to the protrusion 229 of the first connecting unit 220 via an opening shape 721-1 on the other side.

[0130] The second elastic member 720 may include a first region 721 disposed on one side surface of the first connecting unit 220, a second region 722 disposed on the other side surface of the first connecting unit 220, and a third region 724 connecting the first region 721 and the second region 722.

[0131] A first region 721 of the second elastic member 720 may be disposed on a first outer surface 221 of the first connecting unit 220. The first region may be parallel to the first outer surface 221 of the first connecting unit 220. The first region 721 may include a hole 721-1. A protrusion 229 of the first connecting unit 220 may be disposed in the hole 721-1 in the first region 721. The hole 721-1 may be formed at a position corresponding to the protrusion 229 of the first connecting unit 220 in the first region 721. The first connecting unit 220 and the protrusion 229 may pass through the hole 721-1 in the first region 721. The hole 721-1 of the first region 721 may be connected to the protrusion 229 of the first connecting unit 220 using a one-click snap-fit ​​method. The first region 721 may be disposed inside the protrusion 229 of the first connecting unit 220. That is, the protrusion 229 protrudes from the first region 721 to prevent the second elastic member 720 from separating.

[0132] The second region 722 may be disposed on the second outer surface 222 of the first connecting unit 220. The second region 722 of the second elastic member 720 may include two second regions 722-1 and 722-2 spaced apart from each other in the optical axis direction. The second portion 712 of the first elastic member 710 may be disposed between the two second regions 722-1 and 722-2. Each of the two second regions 722-1 and 722-2 may be disposed in the two fifth grooves 228-1 and 228-2 of the first connecting unit 220. The second region 722 may include: a portion parallel to the second outer surface 222 of the first connecting unit 220; and a bent portion 723, which bends from the parallel portion and is disposed in the fifth groove 228 of the second outer surface 222 of the first connecting unit 220. The bent portion 723 may include a hook shape. The bent portion 723 may bend toward the third region 724. The bent portion 723 may at least partially have curvature. The bent portion 723 can be configured to be engaged in the fifth groove 228 of the first connecting unit 220. In the bent portion 723, the first connecting unit 220 can be hooked and engaged with the fifth groove 228. The bent portion 723 can be formed at a position corresponding to the fifth groove 228 of the first connecting unit 220. The bent portion 723 may include a hook shape.

[0133] A third region 724 of the second elastic member 720 may be disposed between the first region 721 and the second region 722. The third region 724 may face the first elastic member 710. The third region 724 may be spaced apart from the first elastic member 710. The third region 724 may contact the first post 410 of the first piezoelectric motor 400. The third region 724 may compress the first post 410 of the first piezoelectric motor 400. The third region 724 may be formed as a flat shape. The third region 724 may at least partially contact the first post 410 of the first piezoelectric motor 400. The inner surface of the third region 724 facing the first connecting unit 220 may include a curved shape at the portion contacting the first post 410. The inner surface of the third region 724 may at least partially have curvature. The inner surface of the third region 724 may include a curved surface formed by at least partially recessing from the inner surface. The outer surface disposed on the opposite side of the inner surface of the third region 724 may include a flat surface. The camera module 10 according to this embodiment may include a third elastic member 810.

[0134] The third elastic member 810 can fix the second piezoelectric motor 500 to the second lens barrel 300. The third elastic member 810 can be disposed on the second outer surface 322 of the second connecting unit 320. The third elastic member 810 can be spaced apart from the fourth elastic member 820. The third elastic member 810 can be spaced apart from the fourth elastic member 820 in a direction perpendicular to the optical axis.

[0135] The third elastic member 810 may include a first portion 811. The first portion 811 may be formed in a shape corresponding to the groove 324 of the second outer surface 322 of the second connecting unit 320. The first portion 811 may be formed in a "V" shape cross-section. The first portion 811 may include: a first inclined surface formed at an angle relative to the second portion 812; and a second inclined surface formed at an angle relative to the second portion 813. The first and second inclined surfaces may be integrally formed. The inclination direction of the first inclined surface may be different from the inclination direction of the second inclined surface. The inclination direction of the first inclined surface may be opposite to the inclination direction of the second inclined surface. The first inclined surface may be disposed between the first portion 811 and the second portion 812. The second inclined surface may be disposed between the first portion 811 and the third portion 813. The first portion 811 may have a first length in the optical axis direction.

[0136] The third elastic member 810 may include a second portion 812. The second portion 812 may extend from one end of the first portion 811 in a direction perpendicular to the optical axis. The second portion 812 may extend from the outer surface of the first portion 811 in a direction perpendicular to the optical axis. The length of the second portion 812 in the optical axis direction may be less than the length of the first portion 811 in the optical axis direction. The second portion 812 may be disposed between the two second regions 822-1 and 822-2 of the fourth elastic member 820. The second portion 812 may have a second length in the optical axis direction. The second length of the second portion 812 may be less than the second length of the first portion 811. The second portion 812 may extend from the first portion 811. The second portion 812 may have the same length in the optical axis direction as the third portion 813 of the third elastic member 810, which will be described later. The second portion 812 and the third portion 813 may be formed symmetrically with respect to the first portion 811. The second portion 812 may be parallel to the third region 824 of the fourth elastic member 820.

[0137] The third elastic member 810 may include a third portion 813. The third portion 813 may extend from the other end of the first portion 811 in a direction perpendicular to the optical axis. The third portion 813 may extend from the outer surface of the first portion 811 in a direction perpendicular to the optical axis. The third portion 813 may have a second length in the optical axis direction. The second length of the third portion 813 in the optical axis direction may be less than the first length of the first portion 811 in the optical axis direction. The second length of the third portion 813 in the optical axis direction may be the same as the length of the second portion 812 in the optical axis direction. The third portion 813 may overlap with the second portion 812 in a direction perpendicular to the optical axis direction. The third portion 813 may be disposed in a hole 821-1 in the first region 821 of the fourth elastic member 820. The second portion 812 and the third portion 813 may not contact the first post 410 of the second piezoelectric motor 500. The third portion 813 may be parallel to the third region 824 of the fourth elastic member 820.

[0138] In a modified embodiment, the third elastic member 810 may further include an extension. The extension extends from the first portion 811 of the third elastic member 810. The extension 811 may be bent at a first angle relative to the first portion 811 of the third elastic member 810. The surface of the extension facing the second connecting unit 320 may form an acute angle with the first portion 811 of the third elastic member 810. The surface of the extension facing the third elastic member 810 may form an obtuse angle with the first portion 811. The extension may not contact the second post of the second piezoelectric motor 500. This facilitates the insertion of the second post. Furthermore, the second post can be easily press-fitted between the third elastic member 810 and the fourth elastic member 820, which have high elastic strength. The extension may include: a first extension extending from a first inclined surface of the first portion 811; and a second extension extending from a second inclined surface of the first portion 811. The first extension may be at least partially spaced apart from the second extension. The separation distance between the first and second extensions may increase as they extend upwards. The first and second extensions may not contact the second post. The first and second extensions may guide the second post during assembly. The third elastic member 810 may be formed in a shape corresponding to the first elastic member 710.

[0139] The camera module 10 according to this embodiment may include a fourth elastic member 820. The fourth elastic member 820 may be formed of an elastic material. The fourth elastic member 820 may be configured to be engaged in a groove 324 on the second outer surface 322 of the second connecting unit 320. The fourth elastic member 820 may compress the second piezoelectric motor 500 in a direction toward the second lens barrel 300. Thus, the fourth elastic member 820 may fix the second piezoelectric motor 500 to the second lens barrel 300. The fourth elastic member 820 is connected to the fifth groove 328 of the second connecting unit 320 via a hook shape on one side, and can be connected to the protrusion 329 of the second connecting unit 320 via an opening shape 821-1 on the other side.

[0140] The fourth elastic member 820 may include: a first region 821 disposed on one side of the second connecting unit 320; a second region 822 disposed on the other side of the second connecting unit 320; and a third region 824 connecting the first region 821 and the second region 822.

[0141] The first region 821 of the fourth elastic member 820 can be disposed on the first outer surface 321 of the second connecting unit 320. The first region 821 of the fourth elastic member 820 can be parallel to the first outer surface 221 of the second connecting unit 320. The first region 821 can include a hole 821-1. In the first region 821, the protrusion 329 of the second connecting unit 320 can be disposed in the hole 821-1. In the first region 821, the hole 821-1 can be formed at a position corresponding to the protrusion 329 of the second connecting unit 320. In the first region 821, the second connecting unit 320 and the protrusion 329 can pass through the hole 821-1. The hole 821-1 of the first region 821 can be connected to the protrusion 329 of the second connecting unit 320 by a one-click snap-fit ​​method. The first region 821 can be disposed further inward than the protrusion 329 of the second connecting unit 320. In other words, the protrusion 329 protrudes more than the first region 821 to prevent the fourth elastic member 820 from separating.

[0142] The second region 822 may be disposed on the second outer surface 322 of the second connecting unit 320. The second region 822 of the fourth elastic member 820 may include two second regions 822-1 and 822-2 spaced apart from each other in the optical axis direction. The second portion 812 of the third elastic member 810 may be disposed between the two second regions 822-1 and 822-2. Each of the two second regions 822-1 and 822-2 may be disposed in the two fifth grooves 328-1 and 328-2 of the second connecting unit 320. The second region 822 may include: a portion parallel to the second outer surface 322 of the second connecting unit 320; and a bent portion 823, which bends from the parallel portion and is disposed in the fifth groove 328 of the second outer surface 322 of the second connecting unit 320. The bent portion 823 may include a hook shape. The bent portion 823 may be configured to be engaged in the fifth groove 328 of the second connecting unit 320. In the bent portion 823, the second connecting unit 320 can be hooked and engaged with the fifth groove 328. The bent portion 823 can be bent toward the third region 824. The bent portion 823 can have at least a partial curvature. The bent portion 823 can be formed at a position corresponding to the fifth groove 328 of the second connecting unit 320. The bent portion 823 can include a hook shape.

[0143] The third region 824 of the fourth elastic member 820 may be disposed between the first region 821 and the second region 822. The third region 824 may face the third elastic member 810. The third region 824 may be spaced apart from the third elastic member 810. The third region 824 may contact the second post of the second piezoelectric motor 500. The third region 824 may compress the second post of the second piezoelectric motor 500. The third region 824 may be formed as a flat shape. The third region 824 may at least partially contact the second post of the second piezoelectric motor 500. The inner surface of the third region 824 facing the second connecting unit 320 may include a curved shape at the portion contacting the second post. The inner surface of the third region 824 may at least partially have curvature. The inner surface of the third region 824 may include a curved surface formed by being at least partially recessed from the inner surface. The outer surface disposed opposite to the inner surface of the third region 824 may include a flat surface.

[0144] The camera module 10 according to this embodiment may include a printed circuit board 900. The printed circuit board 900 may be disposed below the housing. The printed circuit board 900 may be disposed below the lower plate unit 130 of the housing. The printed circuit board 900 may supply power or current to components disposed inside the housing. The printed circuit board 900 may include a flexible substrate. The printed circuit board 900 may include a flexible printed circuit board (FPCB). An image sensor 910 may be disposed on the upper surface of the printed circuit board 900. The image sensor 910 may be disposed on the printed circuit board 900. The image sensor 910 may be disposed at positions corresponding to the first to fourth lenses 140, 240, 340, and 150.

[0145] An optical device according to this embodiment will be described below.

[0146] The optical device can be any of the following: a handheld phone, a portable phone, a smartphone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), and a navigation device. However, the type of optical device is not limited to these, and any device used to capture video or pictures can be included in the optical device.

[0147] Although embodiments of the invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the invention can be practiced in other specific forms without altering its technical spirit or essential characteristics. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims

1. A camera module, comprising: case; A lens barrel, which is disposed within the housing; A lens, which is connected to the lens barrel; A first elastic member and a second elastic member are connected to the lens barrel; as well as A piezoelectric motor, comprising a column disposed between a first elastic member and a second elastic member. The first elastic member and the second elastic member are configured to compress the column of the piezoelectric motor. The lens barrel includes a main body unit and a connecting unit, wherein the connecting unit is connected to the main body unit. The connecting unit includes a groove and a protrusion. The groove is connected to one side of the second elastic member, and the protrusion is connected to the other side of the second elastic member. The housing includes an upper plate unit and side plate units extending from the upper plate unit. The lens barrel includes a second lens barrel and a first lens barrel, wherein the first lens barrel is disposed between the upper plate of the housing and the second lens barrel. The lens includes a first lens, a second lens, and a third lens. The first lens is connected to the upper plate unit of the housing, the second lens is connected to the first lens barrel, and the third lens is connected to the second lens barrel. The second lens and the third lens can move independently.

2. The camera module according to claim 1, wherein, Each of the first and second lens barrels includes the main body unit and the connecting unit, and Wherein, the upper end of the main body unit of the first lens barrel is configured to be higher than the upper end of the connecting unit of the first lens barrel.

3. The camera module according to claim 1, wherein, Each of the first and second lens barrels includes the main body unit and the connecting unit, and Wherein, the lower end of the main body unit of the second lens barrel is configured to be lower than the lower end of the connecting unit of the second lens barrel.

4. The camera module according to claim 1, comprising: A first magnetic scale is set on the first lens tube; as well as The first sensor is configured to sense the first magnetic scale. Each of the first lens barrel and the second lens barrel includes the main body unit and the connecting unit, and In the optical axis direction, the length of the first magnetic scale is greater than the length of the main body unit of the first lens barrel.

5. The camera module according to claim 1, comprising: The second magnetic scale is set on the second lens tube; as well as The second sensor is configured to sense the second magnetic scale. Each of the first lens barrel and the second lens barrel includes the main body unit and the connecting unit, and In the optical axis direction, the length of the second magnetic scale is greater than the length of the main body unit of the second lens tube.

6. The camera module according to claim 1, wherein, The second lens and the third lens are configured to move in the optical axis direction, and The movable distance of the second lens is different from that of the third lens.

7. The camera module according to claim 1, wherein, The lens includes a fourth lens that is fixed to the housing. The second lens and the third lens are disposed between the first lens and the fourth lens.

8. The camera module according to claim 1, wherein, The first elastic member includes: a first portion having a first length in the optical axis direction; and a second portion and a third portion extending from the first portion and having a second length less than the first length in the optical axis direction.

9. The camera module according to claim 8, wherein, The first elastic member includes a first inclined surface and a second inclined surface. The first inclined surface is disposed between the first portion and the second portion of the first elastic member, and the second inclined surface is disposed between the first portion and the third portion of the first elastic member. Wherein, the tilting direction of the first inclined surface of the first elastic member is different from the tilting direction of the second inclined surface of the first elastic member.

10. The camera module according to claim 8, wherein, The first elastic member includes an extension that bends from the first portion at a first angle, and The extension of the first elastic member does not contact the column of the piezoelectric motor.

11. The camera module according to claim 1, wherein, The connecting unit of the lens barrel includes a first groove and a second groove, one side of the first elastic member is inserted into the first groove, and the other side of the first elastic member is inserted into the second groove.

12. The camera module according to claim 8, wherein, The second elastic member includes a first region, a second region, and a third region. The first region is disposed on one side surface of the connecting unit of the lens barrel, the second region is disposed on the other side surface of the connecting unit of the lens barrel, and the third region connects the first region and the second region. The third region of the second elastic member is formed as a flat shape, and at least a portion of the third region is in contact with the column of the piezoelectric motor.

13. The camera module according to claim 12, wherein, The second region of the second elastic member includes a bent portion that bends toward the third region of the second elastic member. Wherein, the other side surface of the connecting unit of the lens barrel includes a groove, and Wherein, the curved portion of the second region of the second elastic member is configured to be engaged by the groove of the connecting unit of the lens barrel.

14. The camera module according to claim 12, wherein, The first region of the second elastic member includes a hole, and The hole in the second elastic member is connected to the protrusion of the connecting unit of the lens barrel.

15. The camera module according to claim 12, wherein, The second region of the second elastic member includes two second regions spaced apart from each other in the direction of the optical axis, and The second portion of the first elastic member is disposed between the two second regions of the second elastic member.

16. The camera module according to claim 12, wherein, The second portion and the third portion of the first elastic member are parallel to the third region of the second elastic member.

17. The camera module according to claim 1, wherein, The second elastic member includes a curved inner surface facing the column. Wherein, the second elastic member is configured to compress the column toward the first elastic member at the inner curved surface, and The outer surface of the second elastic member, opposite to the curved inner surface, is flat.

18. A camera module, comprising: case; A lens barrel, which is disposed within the housing; A lens, which is connected to the lens barrel; A first elastic member and a second elastic member are connected to the lens barrel; as well as A piezoelectric motor, comprising a column disposed between a first elastic member and a second elastic member. The first elastic member and the second elastic member are configured to compress the column of the piezoelectric motor. The housing includes an upper plate unit and side plate units extending from the upper plate unit. The lens barrel includes a second lens barrel and a first lens barrel, wherein the first lens barrel is disposed between the upper plate of the housing and the second lens barrel. The lens includes a first lens, a second lens, and a third lens. The first lens is connected to the upper plate unit of the housing, the second lens is connected to the first lens barrel, and the third lens is connected to the second lens barrel. The second lens and the third lens can move independently.

19. The camera module according to claim 18, wherein, Each of the first and second lens barrels includes the main body unit and the connecting unit, and Wherein, the upper end of the main body unit of the first lens barrel is configured to be higher than the upper end of the connecting unit of the first lens barrel.

20. An optical device, comprising: main body; A camera module according to any one of claims 1 to 19, disposed on the main body; as well as A display is mounted on the main body and outputs images captured by the camera module.

21. A camera module, comprising: case; A lens barrel, which is disposed within the housing; A lens, which is connected to the lens barrel; A first elastic member and a second elastic member are connected to the lens barrel; as well as A piezoelectric motor, the piezoelectric motor including a column disposed between a first elastic member and a second elastic member.

22. A camera module, comprising: case; A lens barrel, which is disposed within the housing; A lens, which is connected to the lens barrel; A first elastic member and a second elastic member are connected to the lens barrel; as well as A piezoelectric motor, comprising a column disposed between a first elastic member and a second elastic member. The first elastic member and the second elastic member are configured to compress the column of the piezoelectric motor. The lens barrel includes a main body unit and a connecting unit, wherein the connecting unit is connected to the main body unit. The connecting unit includes a groove and a protrusion. The groove is connected to one side of the second elastic member, and the protrusion is connected to the other side of the second elastic member. The second elastic member includes a first region, a second region, and a third region. The first region is disposed on one side surface of the connecting unit of the lens barrel, the second region is disposed on the other side surface of the connecting unit of the lens barrel, and the third region connects the first region and the second region. The third region of the second elastic member is formed as a flat shape, and at least a portion of the third region is in contact with the column of the piezoelectric motor. The first elastic member includes a first portion and an extension, the first portion being disposed on the connecting unit, and the extension bending from the first portion at a first angle. The extension of the first elastic member does not contact the column of the piezoelectric motor.

Images