KR102417940B1 - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

The present embodiment includes a base and a housing disposed at each of the four corners of the base, the housing including first, second, third, and fourth pillars protruding upward from the base; a bobbin positioned within the housing; a coil disposed in the housing, at least a portion of which is exposed to the inside of the housing through between the first pole and the second pole; a magnet disposed on the bobbin and facing the coil exposed through between the first pole and the second pole; It is disposed in the housing, is positioned between the third pillar and the fourth pillar, and includes a roller in contact with the bobbin, wherein the coil and the roller face each other with the bobbin interposed therebetween, the roller being the first It relates to a lens driving device, a camera module, and an optical device including a curved surface arranged to rotate about an axis extending from the third pillar to the fourth pillar.

Description

LENS DRIVING DEVICE, CAMERA MODULE AND OPTICAL APPARATUS

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

The content described below provides background information on the present embodiment and does not describe the prior art.

As various types of portable terminals are widely distributed and wireless Internet services are commercialized, the needs of consumers related to portable terminals are also diversifying. Accordingly, various types of additional devices are being installed in portable terminals.

Among them, there is a camera module that takes a picture or video of a subject as a representative one. Recently, a camera module having an autofocus function, which is a function of automatically adjusting a focus according to a distance of a subject, has appeared. For information related to a general camera module, reference may be made to Patent Publication No. 10-2015-0008662 (January 23, 2015) and US Patent Publication No. US 2011/0141564 (Publication Date: June 16, 2011). .

The VCM (Voice Coil Motor) is a lens driving device, and performs an autofocus function by placing a magnet and a coil on a bobbin and a housing, and moving the bobbin in the optical axis direction by electromagnetic interaction between the magnet and the coil. In this case, in general, the bobbin is elastically supported by the housing by a plate spring, and is guided in the optical axis direction.

The present embodiment intends to provide a lens driving device having a new structure for guiding the bobbin in the optical axis direction by using a roller instead of a leaf spring.

The lens driving device of this embodiment includes: a base, a housing disposed at each of the four corners of the base, the housing including first, second, third, and fourth pillars protruding upward from the base; a bobbin positioned within the housing; a coil disposed in the housing, at least a portion of which is exposed to the inside of the housing through between the first pole and the second pole; a magnet disposed on the bobbin and facing the coil exposed through between the first pole and the second pole; It is disposed in the housing, is positioned between the third pillar and the fourth pillar, and includes a roller in contact with the bobbin, wherein the coil and the roller face each other with the bobbin interposed therebetween, the roller being the first It may include a curved surface arranged to rotate about an axis extending from the third pillar to the fourth pillar.

It is positioned between the housing and the coil and further includes a terminal electrically connected to the coil, and the material of the terminal includes a magnetic material so that an attractive force may act between the terminal and the magnet.

The magnet may include a first magnet disposed on the bobbin and facing the coil, a second magnet disposed on the bobbin and facing the roller, disposed in the housing and positioned between the third pillar and the fourth pillar. and a third magnet, and an attractive force may act between the second magnet and the third magnet.

The roller may be disposed between the second magnet and the third magnet.

The coil may include: a first coil portion extending from the first pillar toward the second pillar; a second coil part located under the first coil part and extending from the second pole toward the first pole; a third coil part connecting one side of the first coil part and one side of the second coil part; and a fourth coil part connecting the other side of the first coil part and the other side of the second coil part, wherein the magnet includes: a first magnet part facing the first coil part; and a second magnet part facing the second coil part, and the polarity arrangement of the first magnet part and the second magnet part may be different from each other.

The housing includes a first connection part connecting the first pillar and the second pillar, a second connection part connecting the first pillar and the second pillar and located below the first connection part, and the second pillar and a first sidewall connecting the third pillar, a second sidewall connecting the third pillar and the fourth pillar, and a third sidewall connecting the fourth pillar and the first pillar, wherein the The coil may be positioned between the first connector and the second connector, and the roller may be positioned inside the second sidewall.

The housing may further include a first contact portion and a second contact portion protruding from the second sidewall in a direction in which the roller is positioned and contacting the roller.

The housing includes a first blocking wall positioned inside the second side wall and protruding from the third pillar in a direction in which the fourth pillar is located, and a first blocking wall located inside the second side wall and the third pillar from the fourth pillar It further comprises a second blocking wall protruding in the direction in which the roller is located, and one side of the roller is located between the first contact part and the first blocking wall and is in contact with one side of the first blocking wall, and the other side of the roller is It may be positioned between the second contact part and the second blocking wall to be in contact with one side of the second blocking wall.

The bobbin may include a third contact portion and a fourth contact portion protruding in a direction in which the roller is positioned from a surface opposite to the second sidewall and contacting the roller.

The camera module of this embodiment includes a base, and a housing including first, second, third, and fourth pillars disposed at each of the four corners of the base and protruding upward from the base; a bobbin positioned inside the housing; a lens module disposed inside the bobbin; a substrate disposed under the base; an image sensor disposed on the substrate and positioned to face the lens module; a coil disposed in the housing, at least a portion of which is exposed to the inside of the housing through between the first pole and the second pole; a magnet disposed on the bobbin and facing the coil exposed through between the first pole and the second pole; It is disposed in the housing, is positioned between the third pillar and the fourth pillar, and includes a roller in contact with the bobbin, wherein the coil and the roller face each other with the bobbin interposed therebetween, the roller being the first It may include a curved surface arranged to rotate about an axis extending from the third pillar to the fourth pillar.

The optical device of this embodiment includes a main body; a display unit located on one side of the body; a housing disposed on the inside of the main body and disposed at a base and four corners of the base, respectively, and including first, second, third, and fourth pillars protruding upward from the base; a bobbin positioned inside the housing; a lens module disposed inside the bobbin; a substrate disposed under the base and electrically connected to the display unit; an image sensor disposed on the substrate and positioned to face the lens module; a coil disposed in the housing, at least a portion of which is exposed to the inside of the housing through between the first pole and the second pole; a magnet disposed on the bobbin and facing the coil; It is disposed in the housing, is positioned between the third pillar and the fourth pillar, and includes a roller in contact with the bobbin, wherein the coil and the roller face each other with the bobbin interposed therebetween, the roller being the first It may include a curved surface arranged to rotate about an axis extending from the third pillar to the fourth pillar.

According to the present embodiment, there is provided a lens driving device having a novel structure in which a bobbin is guided in an optical axis direction by a roller. Furthermore, it provides a camera module and an optical device including the lens driving device.

1 is a perspective view showing a lens driving device according to a first embodiment of the present invention.
2 is an exploded perspective view showing the lens driving device according to the first embodiment.
3 is a cross-sectional view illustrating the lens driving device according to the first exemplary embodiment taken along line AA′.
4 is a cross-sectional view illustrating the lens driving device according to the first embodiment of the present invention taken along line BB'.
5 is a cross-sectional view showing the camera module of the first embodiment based on the view of FIG. 3 .
6 is a perspective view illustrating a bobbin, a first magnet, and a second magnet of the lens driving device according to the first embodiment.
7 is an exploded perspective view illustrating a bobbin, a first magnet, and a second magnet of the lens driving device according to the first embodiment.
8 is a perspective view illustrating a base, a coil, a third magnet, a roller, a blocking member, and a terminal member of the lens driving device according to the first embodiment.
9 is an exploded perspective view showing a base, a coil, a third magnet, a roller, a blocking member, and a terminal member of the lens driving device according to the first embodiment.
10 is a plan view showing that the roller is in contact with the base in the lens driving device of the first embodiment.
11 is a perspective view showing the lens driving device of the second embodiment except for the cover.

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

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When a component is described as being “connected”, “coupled” or “connected” to another component, the component may be directly connected, coupled, or connected to the other component, but the component and the other component It should be understood that another element may be “connected”, “coupled” or “connected” between elements.

The “optical axis direction” used below is defined as the optical axis direction of the lens module coupled to the lens driving device. Meanwhile, “optical axis direction” may be used interchangeably with “vertical direction” and “vertical direction”.

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

Hereinafter, the configuration of the optical device according to the present embodiment will be described. The optical device according to this embodiment is a mobile phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) ), navigation, etc., but is not limited thereto, and any device for taking an image or photo is possible.

The optical device according to this embodiment includes a main body (not shown), a display unit (not shown) disposed on one surface of the main body to display information, and a display unit and electrical It may include a camera module (not shown) connected to.

Hereinafter, the configuration of the camera module 1 according to the present embodiment will be described with reference to the drawings. FIG. 5 is a cross-sectional view illustrating the camera module of the present embodiment based on the view of FIG. 3 . The camera module 1 of this embodiment may include a lens driving device 1000 , a lens module 10 , an infrared cut filter 20 , a substrate 30 , an image sensor 40 , and a controller (not shown). .

The lens module 10 may include a lens and a lens barrel. The lens module 10 may include one or more lenses (not shown) and a lens barrel accommodating the one or more lenses. However, one configuration of the lens module 10 is not limited to the lens barrel, and any holder structure capable of supporting one or more lenses may be used. The lens module 10 may be coupled to the lens driving device 1000 to move together with the lens driving device 1000 . The lens module 10 may be coupled to the inside of the lens driving device 1000 as an example. The lens module 10 may be screw-coupled to the lens driving device 1000 as an example. As an example, the lens module 10 may be coupled to the lens driving device 1000 by an adhesive (not shown). Meanwhile, the light passing through the lens module 10 may be irradiated to the image sensor 40 .

The infrared cut filter 20 may block light in the infrared region from being incident on the image sensor 40 . The infrared cut filter 20 may be positioned between the lens module 10 and the image sensor 40 as an example. The infrared cut filter 20 may be located on a holder member (not shown) provided separately from the housing 200 . However, the infrared filter 20 may be mounted in the hole B-1 formed in the central portion of the base B. The infrared filter 20 may be formed of, for example, a film material or a glass material. As an example, the infrared filter 20 may be formed by coating an infrared blocking coating material on a plate-shaped optical filter such as a cover glass for protecting an imaging surface or a cover glass.

The board 30 may be a printed circuit board (PCB). The substrate 30 may support the lens driving device 1000 . The image sensor 20 may be mounted on the substrate 30 . As an example, an image sensor may be positioned inside the upper surface of the substrate, and a sensor holder (not shown) may be positioned outside the upper surface of the substrate 30 . The lens driving device 1000 may be positioned above the sensor holder. Alternatively, the lens driving device 1000 may be positioned outside the upper surface of the substrate 30 , and the image sensor 20 may be positioned inside the upper surface of the substrate 30 . Through such a structure, light passing through the lens module 10 accommodated inside the lens driving device 1000 may be irradiated to the image sensor 40 mounted on the substrate 30 . The substrate 30 may supply power to the lens driving apparatus 1000 . The substrate 30 may be electrically connected to the display unit. Meanwhile, a control unit for controlling the lens driving apparatus 1000 may be located on the substrate 30 .

The image sensor 40 may be mounted on the substrate 20 . The image sensor 40 may be positioned so that the lens module 10 and the optical axis coincide. Through this, the image sensor 40 may acquire the light passing through the lens module 10 . The image sensor 40 may output the irradiated light as an image. The image sensor 40 may be, for example, a charge coupled device (CCD), a metal oxide semi-conductor (MOS), a CPD, and a CID. However, the type of the image sensor 40 is not limited thereto.

The control unit may be mounted on the substrate 30 . The control unit may be located outside the lens driving device 1000 . However, the control unit may be located inside the lens driving apparatus 1000 . The controller may control the direction, intensity, and amplitude of current supplied to each of the components constituting the lens driving apparatus 1000 . The controller may control the lens driving apparatus 1000 to perform an autofocus function of the camera module 1 . That is, the controller may control the lens driving device 1000 to move the lens module 10 in the optical axis direction.

This lens driving device has a first embodiment and a second embodiment. First, the lens driving apparatus 1000 according to the first embodiment will be described with reference to the drawings. 1 is a perspective view showing a lens driving device according to the first embodiment, FIG. 2 is an exploded perspective view showing the lens driving device according to the first embodiment, and FIG. 4 is a cross-sectional view of the lens driving device of the first embodiment taken along the line B-B′, and FIG. 6 is a bobbin, first magnet, and second magnet of the lens driving device of the first embodiment. 7 is an exploded perspective view showing a bobbin, a first magnet, and a second magnet of the lens driving device of the first embodiment, and FIG. 8 is a base, a coil, and a third magnet of the lens driving device of the first embodiment A perspective view showing a roller, a blocking member, and a terminal member, FIG. 9 is an exploded perspective view showing the base, a coil, a third magnet, a roller, a blocking member, and a terminal member of the lens driving device of the first embodiment, and FIG. It is a plan view showing that the roller is in contact with the base in the lens driving device of the first embodiment.

In the lens driving device 1000 of the first embodiment, the lens module 10 is mounted on the bobbin 700 and integrally moves in the vertical direction (optical axis direction) with the bobbin 700 to perform the autofocus function. have.

The lens driving device 1000 of this embodiment includes a cover 100 , a housing 200 , a coil 300 , a roller 400 , a blocking member 500 , a terminal 600 , a bobbin 700 , and a magnet 800 . may include

The cover 100 may be an exterior member of the lens driving device 1000 . The cover 100 may include a metal material. The cover 100 may block electromagnetic waves from being introduced from the outside to the inside or from being emitted from the inside to the outside. Accordingly, the cover 100 may be referred to as a “shield can”. However, the material of the cover 100 is not limited thereto. For example, the cover 100 may include a plastic material.

The cover 100 may include a top plate 110 and a side plate 120 . The top plate 110 and the side plate 120 may be integrally formed. The upper plate 110 may be in the form of a square plate with rounded corners. A hole 111 aligned with the optical axis may be formed in the center of the upper plate 110 . The side plate 120 may extend downward from the edge of the top plate 110 . That is, there may be a plurality of side plates 120 . The side plate 120 includes a first side plate extending downward from the first side of the top plate 110 , a second side plate extending downward from the second side of the top plate 110 , and a third side of the top plate 110 . It may include a third side plate extending downward, and a fourth side plate extending downward from the fourth side of the upper plate 110 .

That is, the cover 100 may have a rectangular shape in which a hole is formed in the upper surface, the lower surface is opened, and the corner is rounded. The lower opening of the cover 100 may be closed by the base B of the housing 200 . When the cover 100 and the housing 200 are coupled, the lower surface of the side plate 120 of the cover 100 and the upper surface of the base B of the housing 200 may contact (opposite) each other. After that, the contact portion between the lower surface of the side plate 120 of the cover 100 and the upper surface of the base B of the housing 200 or the lower surface of the side plate 120 of the cover 100 and the base of the housing 200 ( An adhesive may be applied (disposed) between the upper surfaces of B).

In the inner space formed by the cover 100 and the base B of the housing 200, the remaining part of the housing 200, the coil 300, the roller 400, the blocking member 500, the terminal 600, The bobbin 700 and the magnet 800 may be accommodated.

Among the plurality of side plates 120 of the cover 100 , a terminal exposed portion 121 may be formed on a side plate facing the coil 300 . The terminal exposed portion 121 may be formed upward from the lower end of the side plate facing the coil 300 among the plurality of side plates 120 of the cover 100 . The first-second terminal portion 612 and the second-second terminal portion 622 of the terminal 600 may be exposed to the outside of the cover 100 through the terminal exposed portion 121 .

The housing 200 may be disposed inside the cover 100 . The housing 200 may be disposed under the cover 100 . A bobbin 700 may be disposed inside the housing 200 . A coil 300 , a roller 400 , a blocking member 500 , and a terminal 600 may be disposed in the housing 200 . The material of the housing 200 may include a plastic material. The housing 200 may be a plastic injection molding.

The housing 200 includes a base (B), a first column (C1), a second column (C2), a third column (C3), a fourth column (C4), a first connection part 210, a second connection part 220 ), a first sidewall 230 , a second sidewall 240 , a third sidewall 250 , a first fixing part 211 , a second fixing part 212 , a terminal receiving part 221 , a first stopper ( 231), second stopper 251, first blocking wall 241, second blocking wall 242, support 243, first step 244, second step 245, first contact portion 246 and a second contact portion 247 may be included.

The base B may be disposed under the cover 100 . The base (B) may be coupled to the cover (100). The base B may support the cover 100 . In this case, the lower surfaces of the plurality of side plates 120 of the cover 100 may contact the upper surface of the base (B). The base (B) may have an approximately square plate shape.

The first pillar C1 , the second pillar C2 , the third pillar C3 , and the fourth pillar C4 may be disposed at four corners of the base B, respectively. The first pillar C1, the second pillar C2, the third pillar C3, and the fourth pillar C4 may protrude upward from the base B. The first pillar C1, the second pillar C2, the third pillar C3, and the fourth pillar C4 may be spaced apart from each other. The first pillar C1 , the second pillar C2 , the third pillar C3 , and the fourth pillar C4 may be positioned to correspond to the four corners (corners) of the base B in a one-to-one correspondence.

A first fixing part 211 protruding outward may be formed on the first pillar C1. A second fixing part 212 protruding to the outside may be formed on the second pillar C2. The first fixing part 211 and the second fixing part 212 are the first coil part 310 , the second coil part 320 , the third coil part 330 , and the fourth coil part ( ) of the coil 300 . 340), the coil 300 may be fixed.

The first connection part 210 and the second connection part 220 may be positioned between the first pillar C1 and the second pillar C2 . The first connection part 210 and the second connection part 220 may connect the first pillar C1 and the second pillar C2. The first connection part 210 may be located on the second connection part 220 . The second connection part 220 may be located below the first connection part 210 . The first connection part 210 may connect the upper end of the first column C1 and the upper end of the second column C2. The second connection part 220 may connect the lower end of the first column C1 and the lower end of the second column C2. The first connection part 210 and the second connection part 220 may be located outside the first pillar C1 and the second pillar C2 . That is, the first connection part 210 and the second connection part 220 may connect the outer surfaces of the first pillar C1 and the second pillar C2 .

The coil 300 may be positioned between the first connector 210 and the second connector 220 . A lower surface of the first connection part 210 may contact an upper surface of the first coil part 310 of the coil 300 . An adhesive may be disposed at a contact portion between the first connector 210 and the coil 300 .

A terminal 600 may be disposed between the second connector 220 and the coil 300 . A 1-1 terminal part 611 and a 2-1 terminal part 621 may be disposed between the upper surface of the second connection part 220 and the lower surface of the second coil part 320 of the coil 300 .

A terminal accommodating part 221 may be formed in the center of the second connection part 220 . The terminal accommodating part 221 may be formed inward from the outer surface of the second connection part 220 . The terminal receiving part 221 may be positioned to directly face the terminal exposed part 121 of the cover 100 . The terminal accommodating part 221 may extend from the second connection part 220 to the lower end of the base B. A 1-2 th terminal part 612 and a 2-1 th terminal part 622 may be disposed in the terminal accommodating part 221 . In this case, inner surfaces of the 1-2-th terminal part 612 and the 2-1-th terminal part 622 may face and contact the terminal accommodating part 221 . In addition, outer surfaces of the first-2 terminal part 612 and the second terminal part 622 may be exposed to the outside of the cover 100 through the terminal exposure part 121 .

The first sidewall 230 may be positioned between the second pillar C2 and the third pillar C3 . The first sidewall 230 may connect the second pillar C2 and the third pillar C3. The first sidewall 230 may face the third sidewall 270 with the bobbin 700 interposed therebetween. A first stopper 231 protruding inward may be formed in the center of the first sidewall 230 .

The first stopper 251 may face the second stopper 252 with the bobbin 700 interposed therebetween. The first stopper 251 may have a semi-cylindrical shape extending in a vertical direction. That is, a curvature may be formed on the inner surface of the first stopper 251 . In addition, the horizontal cross-section of the first stopper 251 may have a semicircular shape.

The first stopper 251 may be accommodated in the first groove 720 of the bobbin 700 . The first stopper 251 may have a shape corresponding to the first groove 720 of the bobbin 700 . The first stopper 251 may be spaced apart from the bobbin 700 by a predetermined interval. When tilting of the bobbin 700 occurs, the first stopper 251 may contact the bobbin 700 to block tilting of the bobbin 700 .

The second sidewall 240 may be positioned between the third pillar C3 and the fourth pillar C4 . The second sidewall 240 may connect the third pillar C3 and the fourth pillar C4. The second sidewall 240 may face the first connector 210 and the second connector 220 with the bobbin 700 interposed therebetween. A roller 400 may be disposed on the inner surface of the second sidewall 240 . A blocking member 500 may be disposed on the second sidewall 240 . A third magnet 830 may be disposed on an outer surface of the second sidewall 240 .

A first blocking wall 241 protruding from the third pillar C3 to the fourth pillar C4 may be formed on the third pillar C3. The first blocking wall 241 may be located inside the second sidewall 240 . The first blocking wall 241 may be spaced apart from the second sidewall 240 . One end of the roller 400 may be positioned between the first blocking wall 241 and the second side wall 240 . The outer surface of the first blocking wall 241 may be in contact with the roller 400 . In this case, as shown in 1 of FIG. 9 , the outer surface of the first blocking wall 241 may be flat. As a result, the outer surface of the first blocking wall 241 and the roller 400 may be in line contact at the same height (on a vertical cross-section). Alternatively, as shown in (2) of FIG. 9 , the outer surface of the first blocking wall 241 may be convexly curved in the direction in which the roller 400 is located. As a result, the outer surface of the first blocking wall 241 and the roller 400 may be in point contact at the same height (on a vertical cross-section).

A second blocking wall 242 protruding from the fourth pillar C4 to the third pillar C30 may be formed on the fourth pillar C4 . The second blocking wall 242 is formed of the second sidewall 240 . The second blocking wall 242 may be spaced apart from the second sidewall 240. The other end of the roller 400 is between the second blocking wall 242 and the second sidewall 240. The outer surface of the second barrier wall 242 may be in contact with the roller 400. In this case, as shown in FIG. The outer surface may be flat. As a result, the outer surface of the second barrier wall 242 and the roller 400 may be in line contact at the same height (on a vertical cross-section). As shown in, the outer surface of the second barrier wall 242 may be convexly curved in the direction in which the roller 400 is located. As a result, the outer surface of the second barrier wall 242 and the roller ( 400) may be in point contact at the same height (on a vertical cross-section).

A support part 243 protruding upward may be formed on the base (B). The support part 243 may be located inside the second sidewall 240 . The support 243 may be located under the roller 400 . The upper surface of the support 243 may be in contact with the roller 400 to support the roller 400 . The upper surface of the support part 243 may be in contact with the first roller 410 to support the first roller 410 .

A first stepped portion 244 that is lowered may be formed on the upper surface of the third pillar C3. The first step portion 244 may be positioned between the second sidewall 240 and the first blocking wall 241 . A second stepped portion 245 that is lowered may be formed on the upper surface of the fourth pillar C4. The second step portion 245 may be positioned between the second sidewall 240 and the second blocking wall 242 . A blocking member 500 may be disposed on the first stepped portion 244 and the second stepped portion 245 . In this case, the first blocking part 510 of the blocking member 500 may be disposed on the first step part 244 . In addition, the second blocking part 520 of the blocking member 500 may be disposed on the second step part 245 .

A first contact portion 247 that protrudes from the inner surface of the second sidewall 240 in a direction in which one end of the roller 400 is located may be formed on the second sidewall 240 . The first contact portion 247 may contact the roller 400 . The first contact portion 246 may be formed to extend in a vertical direction. In this case, as shown in FIG. 9 ( 1 ), the outer surface of the first contact part 247 may be flat. As a result, the outer surface of the first contact portion 247 and the roller 400 may be in line contact at the same height (on a vertical cross-section). Alternatively, as shown in (2) of FIG. 9 , the outer surface of the first contact part 247 may be convexly curved in a direction in which one end of the roller 400 is located. That is, the first contact portion 247 may have a semi-circular column shape. As a result, the outer surface of the first contact portion 247 and the roller 400 may be in point contact at the same height (on a vertical cross-section).

A second contact portion 248 protruding from the inner surface of the second sidewall 240 in a direction in which the other end of the roller 400 is located may be formed on the second sidewall 240 . The second contact portion 248 may contact the roller 400 . The second contact portion 248 may be formed to extend in a vertical direction. In this case, as shown in FIG. 9 ( 1 ), the outer surface of the second contact part 248 may be flat. As a result, the outer surface of the second contact portion 248 and the roller 400 may be in line contact at the same height (on a vertical cross-section). Alternatively, as shown in (2) of FIG. 9 , the outer surface of the second contact part 248 may be convexly curved in the direction in which the other end of the roller 400 is located. That is, the second contact portion 248 may have a semi-circular column shape. As a result, the outer surface of the second contact portion 248 and the roller 400 may be in point contact at the same height (on a vertical cross-section).

The third sidewall 250 may be positioned between the fourth pillar C4 and the first pillar C1 . The third sidewall 250 may connect the fourth pillar C4 and the first pillar C1. The third sidewall 250 may face the first sidewall 230 with the bobbin 700 interposed therebetween. A second stopper 252 protruding inward may be formed in the center of the third sidewall 250 .

The second stopper 252 may face the first stopper 251 with the bobbin 700 interposed therebetween. The second stopper 252 may have a semi-cylindrical shape extending in a vertical direction. That is, a curvature may be formed on the inner surface of the second stopper 252 . In addition, the horizontal cross-section of the second stopper 252 may have a semicircular shape.

The second stopper 252 may be accommodated in the second groove 740 of the bobbin 700 . The second stopper 252 may have a shape corresponding to the second groove 730 of the bobbin 700 . The second stopper 252 may be spaced apart from the bobbin 700 by a predetermined interval. When tilting of the bobbin 700 occurs, the second stopper 252 may contact the bobbin 700 to block tilting of the bobbin 700 .

The coil 300 may be disposed in the housing 200 . The coil 300 may be disposed outside the first pillar C1 and the second pillar C2 . At least a portion of the coil 300 may be exposed to the inside of the housing 200 through a gap between the first pillar C1 and the second pillar C2 . The coil 300 may be disposed so that the portion exposed to the inside of the housing 200 directly faces the magnet 800 . The coil 300 may be positioned to face the roller 400 with the bobbin 700 interposed therebetween. The coil 300 may be positioned between the first connection part 210 and the second connection part 220 . The coil 300 may be fixed by the first fixing part 211 and the second fixing part 212 .

The coil 300 may be electrically connected to the terminal 600 . In this case, one lead wire of the coil 300 may be electrically connected to the 1-1 terminal part 611 of the first terminal 610 , and the lead wire on the other side of the coil 300 is connected to the second terminal 620 . It may be electrically connected to the second-first terminal part 621 . When a current is applied to the coil 300 , the coil 300 may electromagnetically interact with the first magnet 810 of the magnet 800 to provide AF driving force to the bobbin 700 . In this case, the current may be supplied to the coil 300 from the substrate 30 of the camera module through the terminal 600 . The intensity, wavelength, direction, etc. of the current applied to the coil 300 may be controlled.

The coil 300 may include a first coil part 310 , a second coil part 320 , a third coil part 330 , and a fourth coil part 340 . The first coil part 310 may be positioned on the second coil part 320 . The first coil part 310 may extend from the outer surface of the first column C1 toward the outer surface of the second column C2 . The second coil unit 320 may be positioned below the first coil unit 310 . The second coil part 320 may extend from the outer surface of the second column C2 toward the outer surface of the first column C1. The third coil unit 330 may connect one end of the first coil unit 310 to one end of the second coil unit 320 . The fourth coil unit 340 may connect the other end of the first coil unit 310 to the other end of the second coil unit 320 . Accordingly, the coil 300 may have a ring shape.

The roller 400 may be disposed on the housing 200 . The roller 400 may be located inside the second sidewall 240 . The roller 400 may be positioned between the third pillar C3 and the fourth pillar C4 . The roller 400 may face the coil 300 with the bobbin 700 interposed therebetween. The roller 400 may face the third magnet 820 with the second sidewall 240 interposed therebetween. The roller 400 may be disposed between the second magnet 820 and the third magnet 830 . One end of the roller 400 may be positioned between the second side wall 240 and the first blocking wall 241 . The other end of the roller 400 may be positioned between the second side wall 240 and the second blocking wall 242 .

The material of the roller 400 may include a plastic material. The roller 400 may be a plastic injection molding product.

One end of the roller 400 may be supported in contact with the first contact portion 246 of the second sidewall 240 . One end of the roller 400 may be supported in contact with the outer surface of the first blocking wall 241 . The other end of the roller 400 may be supported in contact with the second contact portion 247 of the second sidewall 240 . The other end of the roller 400 may be supported in contact with the outer surface of the second blocking wall 242 . The middle portion of the roller 400 may contact the third contact portion 740 and the fourth contact portion 750 of the bobbin 700 . In this case, the roller 400 may support the bobbin 700 .

The roller 400 may have a cylindrical shape. The axis of the roller 400 may extend from the third pillar C3 to the fourth pillar C4 . The roller 400 may include a curved surface arranged to rotate about an axis extending from the third pillar C3 to the fourth pillar C4 . The roller 400 may include a curved surface disposed in a circumferential direction about an axis extending from the third pillar C3 to the fourth pillar C4 . Accordingly, when the bobbin 700 moves in the vertical direction (up and down direction), the roller 400 may guide the bobbin 700 in the vertical direction and support the bobbin 700 in the horizontal direction.

The support 243 of the housing 200 may be positioned under the roller 400 . A blocking member 530 may be positioned on the roller 400 .

There may be a plurality of rollers 400 . As an example, the number of rollers 400 may be three. The roller 400 may include a first roller 410 , a second roller 420 , and a third roller 430 stacked in a vertical direction.

The first roller 410 may be supported in contact with the support 243 of the housing 200 . The blocking member 500 may be positioned on the third roller 430 . Accordingly, the blocking member 500 may block the roller 400 from moving upward together with the bobbin 700 and leaving the housing 200 .

The blocking member 500 may be disposed in the housing 200 . The blocking member 500 may be disposed on the roller 400 . The blocking member 500 may be disposed on the third roller 430 . A lower surface of the blocking member 500 may face the roller 400 . The blocking member 500 may have a plate shape. The blocking member 500 may include a first blocking part 510 , a second blocking part 520 , and a third blocking part 530 .

The first blocking part 510 may be disposed on the third pillar C3. The first blocking portion 510 may be disposed on the first stepping portion 244 . A lower surface of the first blocking portion 510 may contact an upper surface of the first stepping portion 244 .

The second blocking part 520 may be disposed on the fourth pillar C4. The second blocking portion 520 may be disposed on the second stepping portion 245 . A lower surface of the second blocking portion 520 may be in contact with an upper surface of the second blocking portion 245 .

The third blocking part 530 may connect the first blocking part 510 and the second blocking part 520 . The third blocking part 530 may be disposed on the second sidewall 240 of the housing 200 . A lower surface of the third blocking part 530 may be in contact with an upper surface of the second sidewall 240 .

The terminal 600 may be disposed on the housing 200 . The terminal 600 may be disposed between the second connection part 220 of the housing 200 and the coil 300 . The terminal 600 may be electrically connected to the coil 300 . The terminal 600 may be electrically connected to the substrate 30 of the camera module. The material of the terminal 600 may include an electrically conductive material. The material of the terminal 600 may include a magnetic material. The material of the terminal 600 may include a metal material.

The terminal 600 may perform a function of supplying current to the coil 300 . Since the terminal 600 is magnetic, an attractive force may act between the terminal 600 and the first magnet 810 of the magnet 800 . As a result, the terminal 600 may prevent the bobbin 700 from being tilted. For example, when a driving force is generated in a direction perpendicular to the bobbin 700 by electromagnetic interaction between the coil 300 and the first magnet 810 , the first magnet 810 is disposed on one side of the bobbin 700 . Since it is deflected, a moment may be generated in the bobbin 700 . In this case, an attractive force acts between the terminal 600 and the first magnet 810 to establish the bobbin 700 , thereby preventing tilting (tilting).

The terminal 600 may include a first terminal 610 and a second terminal 620 . The first terminal 610 and the second terminal 620 may be spaced apart. In this case, the first terminal 610 may be disposed to be biased toward the first pillar C1 , and the second terminal 620 may be disposed to be biased to the second pillar C2 . The first terminal 610 may include a 1-1 terminal part 611 and a 1-2 terminal part 612 . The first-first terminal part 611 may have a plate shape and may be positioned between the coil 300 and the second connection part 220 . The 1-2-th terminal part 612 may extend downward from the 1-1-th terminal part 611 and may be disposed in the terminal receiving part 221 . The 1-1 terminal part 611 may be electrically connected to one side lead wire of the coil 300 . The 1-2 first terminal part 612 may be electrically connected to the substrate 30 of the camera module 1 . The second terminal 620 may include a 2-1 terminal part 621 and a 2-2 terminal part 622 . The second-first terminal part 621 may have a plate shape and may be positioned between the coil 300 and the second connection part 220 . The 2-2nd terminal part 622 may extend downward from the 2-1th terminal part 621 and may be disposed in the terminal receiving part 221 . The 2-1-th terminal part 621 may be electrically connected to the lead wire on the other side of the coil 300 . The second-second terminal part 622 may be electrically connected to the substrate 30 of the camera module 1 .

The bobbin 700 may be located inside the housing 200 . The bobbin 700 may be in the form of a block in which a hole 710 is formed in a vertical direction in the center. The lens module 10 of the camera module 1 may be mounted inside the bobbin 700 . A magnet 800 may be disposed on the bobbin 700 . The material of the bobbin 700 may include a plastic material. The bobbin 700 may be a plastic injection molding product.

The bobbin 700 may move in a vertical direction (up and down direction) by electromagnetic interaction between the coil 300 and the first magnet 810 to perform an AF function. In this case, the bobbin 700 may be supported by the roller 400 and guided in the vertical direction.

The bobbin 700 has a hole 710 , a first groove 720 , a second groove 730 , a first contact part 740 , a second contact part 750 , a magnet receiving part 760 and an upper stopper 770 . may include

In the bobbin 700 , a first groove 720 may be formed on a surface corresponding to the first sidewall 230 of the housing 200 . The first groove 720 may be formed inward from the outer surface of the bobbin 700 . The first stopper 231 of the housing 200 may be accommodated in the first groove 720 .

In the bobbin 700 , a second groove 730 may be formed on a surface corresponding to the third sidewall 250 of the housing 200 . The second groove 730 may be formed inward from the outer surface of the bobbin 700 . The second stopper 232 of the housing 200 may be accommodated in the second groove 730 .

A third contact portion 740 and a fourth contact portion 750 may be formed on a surface of the bobbin 700 corresponding to the second sidewall 250 of the housing 200 .

The third contact portion 740 may protrude from the outer surface of the bobbin 700 in a direction between the center and one end of the roller 400 . The third contact portion 740 may contact the roller 400 . The third contact portion 740 may be formed to extend in a vertical direction. The outer surface of the third contact part 740 may be convexly curved in the direction in which the roller 400 is located. That is, the third contact portion 740 may have a semi-circular column shape. As a result, the outer surface of the third contact portion 740 and the roller 400 may be in point contact at the same height (on a vertical cross-section).

In this modified example (not shown), the outer surface of the third contact part 740 may be flat. As a result, the outer surface of the third contact portion 740 and the roller 400 may be in line contact at the same height (on a vertical cross-section).

The fourth contact portion 750 may protrude from the outer surface of the bobbin 700 in a direction between the center of the roller 400 and the other end. The fourth contact portion 750 may contact the roller 400 . The fourth contact portion 750 may be formed to extend in a vertical direction. The outer surface of the fourth contact part 750 may be convexly curved in the direction in which the roller 400 is located. That is, the fourth contact portion 750 may have a semi-circular column shape. As a result, the outer surface of the fourth contact portion 750 and the roller 400 may be in point contact at the same height (on a vertical cross-section).

In this modified example (not shown), the outer surface of the fourth contact part 750 may be flat. As a result, the outer surface of the fourth contact portion 750 and the roller 400 may be in line contact at the same height (on a vertical cross-section).

The third contact portion 740 and the fourth contact portion 750 may be spaced apart from each other and positioned between the first blocking wall 241 and the second blocking wall 242 . The third contact portion 740 may be located close to one end of the roller 400 , and the fourth contact portion 750 may be located close to the other end of the roller 400 .

A magnet accommodating part 760 may be formed on a surface of the bobbin 700 opposite to the coil 300 . The magnet accommodating part 760 may be formed inward from the outer surface of the bobbin 700 . A first magnet 810 may be disposed in the magnet accommodating part 760 .

An upper stopper 770 protruding upward may be formed on the upper surface of the bobbin 700 . When the bobbin 700 moves upward, the upper stopper 770 may contact the upper plate 110 of the cover 100 to block upward movement of the bobbin 700 . There may be a plurality of upper stoppers 770 . For example, the number of upper stoppers 770 may be four, and the four upper stoppers 770 may be spaced apart from each other in the circumferential direction along the hole 710 of the bobbin.

The magnet 800 may be disposed on the bobbin 700 and the housing 200 . The magnet 800 provides a driving force to the bobbin 700 , prevents the bobbin 700 from tilting, and maintains contact between the bobbin 700 and the roller 400 .

The magnet 800 may include a first magnet 810 , a second magnet 820 , and a third magnet 830 .

The first magnet 810 may be disposed on the bobbin 700 . The first magnet 810 may be disposed on a surface of the bobbin 700 opposite to the first connection part 210 and the second connection part 220 of the housing 200 . The first magnet 810 may be accommodated in the magnet accommodating part 860 . The first magnet 810 may directly face the coil 300 .

The first magnet 810 may electromagnetically interact with the coil 300 to provide a driving force to the bobbin 700 . Accordingly, the first magnet 810 may be referred to as a “driving magnet”. In addition, an attractive force acts between the first magnet 810 and the terminal 600 to prevent the bobbin 700 from being tilted.

The first magnet 810 may include a first magnet part 811 , a second magnet part 812 , and a third magnet part 813 . The first magnet part 811 may be vertically spaced apart from the second magnet part 812 . The third magnet part 813 may be positioned between the first magnet part 811 and the second magnet part 812 .

The first magnet part 811 may directly face the first coil part 310 . The second magnet part 812 may directly face the second coil part 320 . The polarity arrangement (the arrangement of the N pole and the S pole) of the first magnet part 811 and the second magnet part 812 may be different from each other (opposite). This is because the direction of the current flowing through the first coil unit 310 and the second coil unit 320 is different. As a result, even if the direction of the current flowing through the first coil unit 310 and the second coil unit 320 is different, the driving force in the same direction may be generated.

Polarity arrangement of the first magnet unit 811 and the second magnet unit 812 may be arranged outside and inside. For example, the inner side of the first magnet part 811 is an N pole, the outer side of the first magnet part 811 is an S pole, the inner side of the second magnet part 812 is an S pole, and the second magnet part 812 has an S pole. The outer side may be an N pole.

The third magnet part 813 may be disposed between the first magnet part 811 and the second magnet part 812 . The third magnet part 813 may not have a polarity arrangement. That is, the polarity of the third magnet part 813 may be neutral.

The second magnet 820 may be disposed on the bobbin 700 . The second magnet 820 may be disposed on a surface of the bobbin 700 opposite to the second sidewall 240 of the housing 200 . The second magnet 700 may directly face the roller 400 . The second magnet 820 may be disposed between the third contact portion 740 and the fourth contact portion 750 of the bobbin 700 . The second magnet 820 may not contact the roller 400 by the third contact portion 740 and the fourth contact portion 750 (spaced arrangement).

The second magnet 820 may face the third magnet 830 with the roller 400 and the second sidewall 240 of the housing 200 interposed therebetween. An attractive force may act between the second magnet 820 and the third magnet 830 . This is because the roller 400 and the housing 200 are plastic injection moldings, and the magnetic force line passes through. As a result, the second magnet 820 may prevent the bobbin 700 from being tilted. Accordingly, the second magnet 820 may be referred to as a “first tilting magnet”. At the same time, the second magnet 820 may contact the bobbin 700 and the roller 400 . That is, the contact between the third contact portion 740 of the bobbin 700 and the roller 400 and the contact between the fourth contact portion 750 and the roller 400 of the bobbin 700 are the second magnet 820 and the third magnet. It can be held by the attractive force acting between 830 .

The third magnet 830 may be disposed in the housing 200 . The third magnet 830 may be disposed outside the second sidewall 240 of the housing 200 . The third magnet 830 may face the second magnet 820 with the roller 400 and the second sidewall 240 of the housing 200 interposed therebetween. An attractive force may act between the third magnet 830 and the second magnet 820 . As a result, the third magnet 830 may prevent the bobbin 700 from being tilted. Accordingly, the third magnet 830 may be referred to as a “second tilting magnet”. At the same time, the third magnet 830 may contact the bobbin 700 and the roller 400 . That is, the contact between the third contact portion 740 of the bobbin 700 and the roller 400 and the contact between the fourth contact portion 750 and the roller 400 of the bobbin 700 are the third magnet 830 and the second magnet It can be held by the attractive force acting between 820 .

In the first modification (not shown) of the first embodiment, the third magnet 830 may be a magnetic member. In this case, the material of the magnetic member may include a magnetic metal material. In addition, an attractive force is generated between the second magnet 820 and the magnetic member, so that the functions performed by the second magnet 820 and the third magnet 830 of the first embodiment can be performed identically.

In a second modification (not shown) of the first embodiment, the second magnet 820 may be a magnetic member. In this case, the material of the magnetic member may include a magnetic metal material. In addition, an attractive force is generated between the third magnet 830 and the magnetic member, so that the functions performed by the second magnet 820 and the third magnet 830 of the first embodiment can be performed in the same manner. Meanwhile, in the second modified example, the third magnet 830 may be referred to as a “second magnet”.

Hereinafter, the lens driving device 2000 of the second embodiment will be described with reference to the drawings. 10 is a perspective view showing the lens driving device of the second embodiment with the cover removed.

The lens driving device 2000 of the second embodiment has a cover (not shown), a housing 1200, a coil 1300, a roller (not shown), and a blocking member, similarly to the lens driving device 1000 of the first embodiment. 1500 , a bobbin 1700 , and a magnet (not shown) may be included. The lens driving device 1000 of the first embodiment may be analogously applied to the lens driving device 2000 of the second embodiment.

The lens driving device 2000 of the second embodiment is characterized in that a Hall sensor 1900 is disposed. A more precise AF function may be performed by measuring the position of the bobbin 1700 by the Hall sensor 1900 and feeding back the measurement information to perform the AF function.

The Hall sensor 1900 may be disposed between the first coil part 1310 , the second coil part 1320 , the third coil part 1330 , and the fourth coil part 1340 of the coil 1300 . have. The Hall sensor 1900 may be disposed between the first fixing part and the second fixing part of the housing 1200 . That is, the Hall sensor 1900 may be disposed at the center of the coil 1300 . The Hall sensor 1900 may sense the magnetic force of the first magnet to measure the position of the bobbin 1700 . The Hall sensor 1900 may be mounted on the Hall sensor substrate 1910 .

The Hall sensor substrate 1910 may be disposed between the housing 200 and the cover 100 . The Hall sensor substrate 1910 may be disposed to face the coil 1300 . The Hall sensor substrate 1910 may be electrically connected to the coil 1300 . The hall sensor substrate 1910 may be electrically connected to the substrate 30 of the camera module 1 . Accordingly, the coil 1300 may receive current from the substrate 30 of the camera module 1 through the hall sensor substrate 1910 . Also, the position measurement value of the bobbin 1700 may be transmitted to the substrate 30 of the camera module 1 through the hall sensor substrate 1910 . The controller of the camera module 1 may control the current applied to the coil 1700 according to the position measurement value of the bobbin 1700 .

In the lens driving device 2000 of the second embodiment, the terminal 600 of the lens driving device 1000 of the first embodiment may be omitted. Instead, a magnetic material 1600 may be added. The magnetic body 1600 may have a plate shape and may be disposed between the second coil unit 1320 and the second connection unit. An attractive force acts between the magnetic body 1600 and the first magnet, so that tilting of the bobbin 1700 may be prevented.

In the above, even though it has been described that all the components constituting the embodiment of the present invention operate by being combined or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise specified, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (11)

a housing including a base and first to fourth pillars protruding from the four corners of the base;
a bobbin disposed within the housing;
a coil disposed in the housing and disposed between the first pillar and the second pillar;
a first magnet disposed on the bobbin and facing the coil; and
and a roller disposed between the third pillar and the fourth pillar and facing the coil with the bobbin interposed therebetween,
The housing includes a third sidewall positioned between the third pillar and the fourth pillar, a first blocking wall protruding from the third pillar in a direction from the third pillar to the fourth pillar, and the fourth pillar and a second blocking wall protruding from the fourth pillar in the direction of the third pillar,
The first blocking wall and the second blocking wall are spaced apart from the second side wall and located inside the second side wall,
One end of the roller is located between the first blocking wall and the second side wall, and the other end of the roller is located between the second blocking wall and the second side wall,
The bobbin includes a protrusion protruding from the outer circumferential surface,
An outer peripheral surface of the protrusion of the bobbin is in contact with a portion of the roller opened between the first blocking wall and the second blocking wall. According to claim 1,
The housing is
a first connection part and a second connection part connecting the first pillar and the second pillar;
a first side wall connecting the second pillar and the third pillar;
and a third side wall connecting the fourth pillar and the first pillar,
The coil is positioned between the first connection part and the second connection part. According to claim 1,
a second magnet disposed on the bobbin and facing the roller; and
and a third magnet disposed on the second sidewall of the housing,
The roller is disposed between the second magnet and the third magnet,
A lens driving device in which an attractive force acts between the second magnet and the third magnet. According to claim 1,
and a terminal disposed on the housing and electrically connected to the coil. The method of claim 1,
The housing is
a first contact portion protruding from the second sidewall toward the one end of the roller and contacting the one end of the roller; and
and a second contact portion protruding from the second sidewall toward the other end of the roller and contacting the other end of the roller. 3. The method of claim 2,
The housing includes a stopper protruding from an inner surface of each of the first sidewall and the third sidewall,
A lens driving device in which a groove for accommodating a stopper of the housing is formed in an outer surface of the bobbin. According to claim 1,
The roller is a lens driving device that rotates about an axis extending from the third pillar to the fourth pillar. According to claim 1,
The housing includes a first step down from the top surface of the third pillar and a second step down from the top surface of the fourth pillar,
and a blocking member positioned on the roller and disposed on the first step portion and the second step portion. According to claim 1,
The protrusion of the bobbin is a lens driving device in the form of a pillar extending from an upper surface of the bobbin to a lower surface of the bobbin. lens;
The lens driving device according to any one of claims 1 to 9; and
A camera module containing an image sensor. main body;
a display unit located on one side of the body; and
An optical device comprising the camera module according to claim 10.

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