KR102544168B1 - Lens driving device, camera module and optical apparatus - Google Patents

Abstract

The embodiment includes a housing including first to fourth pillars, a bobbin disposed in the housing, a coil disposed between the first and second pillars, a first magnet disposed on the bobbin to face the coil, and third and fourth poles. A support portion disposed between the four pillars and supporting the bobbin, the housing including a first wall disposed between the first portion of the support portion and the bobbin and a second wall disposed between the second portion of the support portion and the bobbin; The bobbin includes a protrusion positioned between the first and second walls, the protrusion contacting the third portion of the support.

Description

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

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

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

As the distribution of various portable terminals is widely generalized and wireless Internet services are commercialized, consumers' demands related to portable terminals are also diversifying, and various types of additional devices are being installed in portable terminals.

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

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

In this embodiment, it is intended to provide a lens driving device having a new structure for guiding a bobbin in an optical axis direction using rollers instead of leaf springs.

A lens driving device according to an embodiment includes a housing including first to fourth pillars; a bobbin disposed within the housing; a coil disposed between the first and second pillars; a first magnet disposed on the bobbin to face the coil; and a support portion disposed between the third and fourth pillars and supporting the bobbin, wherein the housing includes a first wall disposed between the first portion of the support portion and the bobbin, and a second portion of the support portion and the bobbin. and a second wall disposed between the bobbins, the bobbin including a protrusion positioned between the first wall and the second wall, the protrusion contacting a third portion of the support.

The third portion of the support may connect the first portion and the second portion. The first wall and the second wall may be spaced apart from sidewalls of the housing positioned between the third pillar and the fourth pillar.

The first wall may protrude from the third pillar toward the fourth pillar, and the second wall may protrude from the fourth pillar toward the third pillar.

The first wall may protrude from the third pillar, and the second wall may protrude from the fourth pillar.

The support may include at least one roller.

The lens driving device may include a terminal disposed on the housing, and the terminal may include a first terminal electrically connected to one end of the coil and a second terminal electrically connected to the other end of the coil.

The housing includes a first fixing part disposed on the first pillar part and a second fixing part disposed on the second pillar part, and the coil forms a ring shape on the first fixing part and the second fixing part. can be wrapped

The lens driving device includes a second magnet disposed on the bobbin and facing the support part; and a third magnet disposed on a sidewall of the housing positioned between the third and fourth pillars. An attractive force may act between the second magnet and the third magnet.

The housing includes a first contact portion protruding from a sidewall of the housing positioned between the third pillar and the fourth pillar and contacting the first portion of the support part; and a second contact portion protruding from the sidewall of the housing and contacting the second portion of the support portion.

The housing may include a first stopper protruding from a sidewall of the housing positioned between the second pillar and the third pillar, and the bobbin may include a first groove in which the first stopper is disposed. . The housing may include a second stopper protruding from a sidewall of the housing located between the first pillar and the fourth pillar, and the bobbin may include a second groove in which the second stopper is disposed. .

The support part may include a plurality of rollers disposed in an optical axis direction.

The protruding portion may protrude from an outer surface of the bobbin, and the bobbin may include a contact portion protruding from an outer surface of the protruding portion facing the support portion and contacting the third portion of the support portion.

The contact portion of the bobbin may have a columnar shape extending from an upper surface of the protruding portion toward a lower surface of the protruding portion.

The lens driving device may include a blocking member disposed on a sidewall of the housing positioned between the third pillar and the fourth pillar and preventing the support part from escaping out of the housing.

A lens driving device according to another embodiment includes a housing including first to fourth pillars; a bobbin disposed within the housing; a coil disposed between the first and second pillars; a first magnet disposed on the bobbin to face the coil; and a support portion disposed between the third and fourth pillars and supporting the bobbin, wherein the housing includes a sidewall positioned between the third pillar and the fourth pillar; and a first wall and a second wall spaced apart from each other and disposed between the side wall and the bobbin, wherein the bobbin includes a protrusion positioned between the first wall and the second wall, and the support portion includes the first wall and the second wall. A first part contacting the first wall, a second part contacting the second wall, and a third part contacting the protruding portion of the bobbin.

A camera module according to an embodiment includes a lens; a lens driving device according to any one of claims 1 to 19; and an image sensor. An optical device according to an embodiment includes a camera module according to an embodiment.

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

Fig. 1 is a perspective view showing the lens driving device of the first embodiment.
Fig. 2 is an exploded perspective view showing the lens driving device of the first embodiment.
3 is a cross-sectional view of the lens driving device of the first embodiment along the line AA'.
4 is a cross-sectional view of the lens driving device according to the first embodiment, taken along the line BB'.
FIG. 5 is a cross-sectional view showing the camera module of the first embodiment based on the view of FIG. 3 .
Fig. 6 is a perspective view showing 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 showing a bobbin, a first magnet, and a second magnet of the lens driving device according to the first embodiment.
8 is a 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.
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.
Fig. 10 is a plan view showing that the roller contacts the base in the lens driving device of the first embodiment.
Fig. 11 is a perspective view showing the lens driving device of the second embodiment excluding the cover.

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

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

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

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

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

The optical device according to the present embodiment includes a main body (not shown), a display unit (not shown) disposed on one side of the main body to display information, and a display unit (not shown) disposed inside the main body to take images or photos and to electrically connect the display unit to the display unit. 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. 5 is a cross-sectional view showing 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 is possible. The lens module 10 is coupled to the lens driving device 1000 and may 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 with 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, 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 in 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 center 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 flat optical filter such as a cover glass for protecting an imaging surface or a cover glass.

The substrate 30 may be a printed circuit board (PCB). The substrate 30 may support the lens driving device 1000 . An image sensor 20 may be mounted on the substrate 30 . As an example, an image sensor may be located inside the upper surface of the substrate, and a sensor holder (not shown) may be located outside the upper surface of the substrate 30 . A lens driving device 1000 may be positioned above the sensor holder. Alternatively, the lens driving device 1000 may be located outside the upper surface of the substrate 30 and the image sensor 20 may be located inside the upper surface of the substrate 30 . Through this 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 device 1000 . The substrate 30 may be electrically connected to the display unit. Meanwhile, a control unit for controlling the lens driving device 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 such that an optical axis coincides with the lens module 10 . Through this, the image sensor 40 may obtain light passing through the lens module 10 . The image sensor 40 may output 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 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 device 1000 . The control unit may control the direction, strength, and amplitude of the current supplied to each element constituting the lens driving apparatus 1000 . The controller may perform an auto focus function of the camera module 1 by controlling the lens driving device 1000 . 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 device 1000 of 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. 3 is a lens driving device according to the first embodiment taken along the line A-A'. , Fig. 4 is a cross-sectional view of the lens driving device of the first embodiment 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. Fig. 7 is an exploded perspective view showing a bobbin, a first magnet, and a second magnet of the lens driving device according to the first embodiment, and Fig. 8 is an exploded perspective view showing a base, a coil, and a third magnet of the lens driving device according to the first embodiment. FIG. 9 is an exploded perspective view showing the base, coil, third magnet, roller, blocking member, and 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 one embodiment.

In the lens driving device 1000 according to the first embodiment, the lens module 10 may move in a vertical direction (optical axis direction) integrally with the bobbin 700 while being mounted on the bobbin 700 to perform an autofocus function. there is.

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. can 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 discharged from the inside to the outside. Accordingly, the cover 100 may be referred to as a "shielded can". However, the material of the cover 100 is not limited thereto. For example, the cover 100 may include a plastic material.

The cover 100 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 top plate 110 may be in the form of a square plate with rounded corners. A hole 111 aligned with an 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, the number of side plates 120 may be plural. 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 plate 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 top plate 110 .

That is, the cover 100 may have a shape of a rectangular box having a hole formed on an upper surface, an open lower surface, and rounded corners. The lower opening of the cover 100 may be closed by the base 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 (oppose) each other. Then, 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 (placed) 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.

A terminal exposed portion 121 may be formed on a side plate facing the coil 300 among the plurality of side plates 120 of the cover 100 . The terminal exposed portion 121 may be formed upward from a lower end of a 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 below 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 pillar C1, a second pillar C2, a third pillar C3, a fourth pillar C4, a first connection part 210, and a second connection part 220. ), the first side wall 230, the second side wall 240, the third side wall 250, the first fixing part 211, the second fixing part 212, the terminal accommodating part 221, the first stopper ( 231), second stopper 251, first blocking wall 241, second blocking wall 242, support part 243, first step part 244, second step part 245, first contact part 246 and a second contact portion 247.

Base (B) may be disposed under the cover (100). Base (B) may be combined with the cover (100). 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 be approximately in the shape of a rectangular plate.

The first pillar (C1), the second pillar (C2), the third pillar (C3), and the fourth pillar (C4) may be disposed at each of the four corners of the base (B). 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 located in one-to-one correspondence with the four corners (corners) of the base (B).

A first fixing part 211 protruding outward may be formed on the first pillar C1. A second fixing part 212 protruding outward 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 located 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 above 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 pillar C1 and the upper end of the second pillar C2. The second connection part 220 may connect the lower end of the first pillar C1 and the lower end of the second pillar 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 connection part 210 and the second connection part 220 . The lower surface of the first connection part 210 may contact the upper surface of the first coil part 310 of the coil 300 . An adhesive may be disposed at a contact portion between the first connection portion 210 and the coil 300 .

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

A terminal accommodating portion 221 may be formed at the center of the second connection portion 220 . The terminal accommodating portion 221 may be formed inward from an outer surface of the second connection portion 220 . The terminal accommodating portion 221 may be positioned directly facing the terminal exposed portion 121 of the cover 100 . The terminal accommodating portion 221 may extend from the second connection portion 220 to the lower end of the base B. A 1-2 terminal unit 612 and a 2-1 terminal unit 622 may be disposed in the terminal accommodating unit 221 . In this case, inner surfaces of the 1-2 terminal portion 612 and the 2-1 terminal portion 622 face the terminal accommodating portion 221 and may contact each other. In addition, outer surfaces of the 1-2 terminal portion 612 and the 2-1 terminal portion 622 may be exposed to the outside of the cover 100 through the terminal exposed portion 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 at 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 the 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 the bobbin 700 from tilting.

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 connection part 210 and the second connection part 220 with the bobbin 700 interposed therebetween. A roller 400 may be disposed on an inner surface of the second side wall 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 in the third pillar C3. The first blocking wall 241 may be located inside the second side wall 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 . An outer surface of the first blocking wall 241 may contact 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 can make line contact at the same height (on the vertical 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 can make point contact at the same height (on the vertical 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 on the second side wall 240. The second blocking wall 242 may be spaced apart from the second side wall 240. The other end of the roller 400 is between the second blocking wall 242 and the second side wall 240. The outer surface of the second blocking wall 242 may contact the roller 400. In this case, as shown in (1) of FIG. 9, the second blocking wall 242 As a result, the outer surface of the second blocking wall 242 and the roller 400 can make line contact at the same height (on the vertical section). As shown in, the outer surface of the second blocking 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 blocking wall 242 and the roller ( 400) can make point contact at the same height (on a vertical cross-section).

A support portion 243 protruding upward may be formed on the base B. The support part 243 may be located inside the second side wall 240 . The support part 243 may be located below the roller 400 . The upper surface of the support part 243 may contact the roller 400 to support the roller 400 . The upper surface of the support part 243 may contact the first roller 410 to support the first roller 410 .

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

A first contact portion 247 protruding from an inner surface of the second side wall 240 in a direction where one end of the roller 400 is located may be formed on the second side wall 240 . The first contact portion 247 may contact the roller 400 . The first contact portion 246 may extend in a vertical direction. In this case, as shown in (1) of FIG. 9, the outer surface of the first contact portion 247 may be flat. As a result, the outer surface of the first contact portion 247 and the roller 400 can make line contact at the same height (on the vertical section). Alternatively, as shown in (2) of FIG. 9, the outer surface of the first contact portion 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 semicircular pillar shape. As a result, the outer surface of the first contact portion 247 and the roller 400 can make point contact at the same height (on the vertical cross section).

A second contact portion 248 protruding from the inner surface of the second side wall 240 toward the direction where the other end of the roller 400 is located may be formed on the second side wall 240 . The second contact portion 248 may contact the roller 400 . The second contact portion 248 may extend in a vertical direction. In this case, as shown in (1) of FIG. 9, the outer surface of the second contact portion 248 may be flat. As a result, the outer surface of the second contact portion 248 and the roller 400 can make line contact at the same height (on the vertical section). Alternatively, as shown in (2) of FIG. 9, the outer surface of the second contact portion 248 may be convexly curved in a direction in which the other end of the roller 400 is located. That is, the second contact portion 248 may have a semicircular pillar shape. As a result, the outer surface of the second contact portion 248 and the roller 400 can make point contact at the same height (on the 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 at the center of the third side wall 250 .

The second stopper 252 may face the first stopper 251 and the bobbin 700 interposed therebetween. The second stopper 252 may have a semi-cylindrical shape extending in the 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 730 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 at a predetermined interval. When tilting of the bobbin 700 occurs, the second stopper 252 may contact the bobbin 700 to block the bobbin 700 from tilting.

Coil 300 may be disposed in 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. A portion of the coil 300 exposed to the inside of the housing 200 may be disposed directly facing 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, the lead wire on one side of the coil 300 may be electrically connected to the 1-1 terminal portion 611 of the first terminal 610, and the lead wire on the other side of the coil 300 may be electrically connected to the terminal 1-1 of the first terminal 610. It may be electrically connected to the 2-1 terminal unit 621 . When current is applied to the coil 300 , the coil 300 electromagnetically interacts with the first magnet 810 of the magnet 800 to provide AF driving force to the bobbin 700 . In this case, current may be supplied to the coil 300 through the terminal 600 in the substrate 30 of the camera module. The intensity, wavelength, direction, etc. of the current applied to the coil 300 may be controlled.

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

The roller 400 may be disposed in the housing 200 . The roller 400 may be located inside the second side wall 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 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 located 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.

One end of the roller 400 may contact and be supported with the first contact portion 246 of the second side wall 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 contact and be supported by the second contact portion 247 of the second side wall 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. An 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 around an axis extending from the third pillar C3 to the fourth pillar C4. Therefore, when the bobbin 700 moves in the vertical direction (up and down direction), the roller 400 guides the bobbin 700 in the vertical direction and supports the bobbin 700 in the horizontal direction.

The support part 243 of the housing 200 may be positioned below the roller 400 . A blocking member 530 may be positioned above the roller 400 .

The number of rollers 400 may be plural. For 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 contact and be supported by the support 243 of the housing 200 . A blocking member 500 may be positioned on the third roller 430 . Accordingly, the blocking member 500 may block the roller 400 from moving upward along 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 above 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 portion 510 , a second blocking portion 520 , and a third blocking portion 530 .

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

The second blocking part 520 may be disposed above the fourth pillar C4. The second blocking portion 520 may be disposed above the second stepped portion 245 . A lower surface of the second blocking portion 520 may contact an upper surface of the second stepped 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 portion 530 may contact 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 can prevent the bobbin 700 from tilting. For example, when a driving force is generated in the vertical direction to the bobbin 700 by electromagnetic interaction between the coil 300 and the first magnet 810, the first magnet 810 is on one side of the bobbin 700. Since the arrangement is biased, a moment may be generated in the bobbin 700 . In this case, by erecting the bobbin 700 by an attractive force acting between the terminal 600 and the first magnet 810, it is possible to prevent 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 from each other. In this case, the first terminal 610 may be biased toward the first pillar C1, and the second terminal 620 may be disposed biased toward the second pillar C2. The first terminal 610 may include a 1-1 terminal unit 611 and a 1-2 terminal unit 612 . The 1-1 terminal unit 611 has a plate shape and may be positioned between the coil 300 and the second connection unit 220 . The 1-2 terminal part 612 may extend downward from the 1-1 terminal part 611 and be disposed in the terminal accommodating part 221 . The 1-1 terminal unit 611 may be electrically connected to the lead wire on one side of the coil 300 . The first-second terminal unit 612 may be electrically connected to the substrate 30 of the camera module 1 . The second terminal 620 may include a 2-1 terminal unit 621 and a 2-2 terminal unit 622 . The 2-1 terminal unit 621 has a plate shape and may be positioned between the coil 300 and the second connection unit 220 . The 2-2 terminal part 622 may extend downward from the 2-1 terminal part 621 and be disposed in the terminal accommodating part 221 . The 2-1 terminal unit 621 may be electrically connected to the lead wire on the other side of the coil 300 . The 2-2 terminal unit 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 have a block shape 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.

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

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

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

A second groove 730 may be formed on a surface of the bobbin 700 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 in a direction positioned between the center and one end of the roller 400 on the outer surface of the bobbin 700 . The third contact portion 740 may contact the roller 400 . The third contact portion 740 may be formed to extend in a vertical direction. An outer surface of the third contact portion 740 may be convexly curved in a direction in which the roller 400 is positioned. That is, the third contact portion 740 may have a semicircular pillar shape. As a result, the outer surface of the third contact portion 740 and the roller 400 can make point contact at the same height (on the vertical cross section).

In this modification (not shown), the outer surface of the third contact portion 740 may be flat. As a result, the outer surface of the third contact portion 740 and the roller 400 may make 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 positioned between the center and the other end of the roller 400 . The fourth contact portion 750 may contact the roller 400 . The fourth contact portion 750 may be formed to extend in a vertical direction. An outer surface of the fourth contact portion 750 may be convexly curved in a direction in which the roller 400 is positioned. That is, the fourth contact portion 750 may have a semicircular pillar shape. As a result, the outer surface of the fourth contact portion 750 and the roller 400 can make point contact at the same height (on the vertical cross section).

In this modification (not shown), the outer surface of the fourth contact portion 750 may be flat. As a result, the outer surface of the fourth contact portion 750 and the roller 400 may make 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 part 740 may be positioned close to one end of the roller 400 and the fourth contact part 750 may be positioned close to the other end of the roller 400 .

A magnet accommodating portion 760 may be formed on a surface of the bobbin 700 facing the coil 300 . The magnet accommodating portion 760 may be formed inward from an 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 . The upper stopper 770 may block the upward movement of the bobbin 700 by contacting the upper plate 110 of the cover 100 when the bobbin 700 moves upward. The number of upper stoppers 770 may be plural. 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 a 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 facing 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 provide driving force to the bobbin 700 by electromagnetically interacting with the coil 300 . 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 spaced apart from the second magnet part 812 in a vertical direction. The third magnet part 813 may be located 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 . Polarity arrangement (N pole and S pole arrangement) of the first magnet part 811 and the second magnet part 812 may be different from each other (opposite). This is because the directions of the currents flowing through the first coil unit 310 and the second coil unit 320 are different. As a result, even if the directions of currents flowing through the first coil unit 310 and the second coil unit 320 are different, driving force in the same direction may be generated.

Polarities of the first magnet unit 811 and the second magnet unit 812 may be disposed outside and inside. For example, the inside of the first magnet part 811 is the N pole, the outside of the first magnet part 811 is the S pole, the inside of the second magnet part 812 is the S pole, and the second magnet part 812 The outer side may be the 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 polar 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 facing the second sidewall 240 of the housing 200 . The second magnet 700 may face the roller 400 directly. 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 (distanced 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 lines of magnetic force pass therethrough. As a result, the second magnet 820 can prevent the bobbin 700 from tilting. Accordingly, the second magnet 820 may be referred to as a "first tilting magnet". At the same time, the second magnet 820 may bring the bobbin 700 and the roller 400 into contact. 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 caused by the second magnet 820 and the third magnet It can be maintained by the attractive force acting between (830).

The third magnet 830 may be disposed on 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 can prevent the bobbin 700 from tilting. Accordingly, the third magnet 830 may be referred to as a "second tilting magnet". At the same time, the third magnet 830 may bring the bobbin 700 and the roller 400 into contact. That is, the contact between the third contact part 740 of the bobbin 700 and the roller 400 and the contact between the fourth contact part 750 and the roller 400 of the bobbin 700 are caused by the third magnet 830 and the second magnet It can be maintained 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 metal material having magnetism. In addition, since an attractive force is generated between the second magnet 820 and the magnetic member, the functions performed by the second magnet 820 and the third magnet 830 of the first embodiment can be performed identically.

In the 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 metal material having magnetism. In addition, since attractive force is generated between the third magnet 830 and the magnetic member, the functions performed by the second magnet 820 and the third magnet 830 of the first embodiment can be performed identically. Meanwhile, in the second modified example, the third magnet 830 may be referred to as a "second magnet".

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

Like the lens driving device 1000 of the first embodiment, the lens driving device 2000 of the second embodiment includes a cover (not shown), a housing 1200, a coil 1300, a roller (not shown), and a blocking member. 1500, a bobbin 1700, and a magnet (not shown). The lens driving device 1000 of the first embodiment may be analogically 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 can be performed by measuring the position of the bobbin 1700 by the hall sensor 1900 and performing the AF function by feeding back measurement information.

The Hall sensor 1900 may be disposed between the first coil unit 1310, the second coil unit 1320, the third coil unit 1330, and the fourth coil unit 1340 of the coil 1300. there is. 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 measure the position of the bobbin 1700 by sensing the magnetic force of the first magnet. The Hall sensor 1900 may be mounted on the Hall sensor board 1910 .

The hall sensor substrate 1910 may be disposed between the housing 200 and the cover 100 . The hall sensor substrate 1910 may 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 . In addition, the measurement value of the position of the bobbin 1700 may be transferred 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 measurement value of the position 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 body 1600 may be added. The magnetic material 1600 has a plate shape and may be disposed between the second coil unit 1320 and the second connection unit. Tilting of the bobbin 1700 may be prevented by an attractive force acting between the magnetic body 1600 and the first magnet.

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

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

Claims (20)

A housing including first to fourth pillars;
a bobbin disposed within the housing;
a coil disposed between the first pillar and the second pillar;
a first magnet disposed on the bobbin to face the coil; and
A support portion disposed between the third pillar and the fourth pillar and supporting the bobbin;
the housing includes a first wall disposed between the first portion of the support and the bobbin and a second wall disposed between the second portion of the support and the bobbin;
The bobbin includes a protrusion positioned between the first wall and the second wall,
The lens driving device of claim 1 , wherein the protruding portion contacts a third portion of the support portion. According to claim 1,
The third part of the support unit connects the first part and the second part to the lens driving device. According to claim 1,
The first wall and the second wall are spaced apart from the sidewall of the housing positioned between the third pillar and the fourth pillar. According to claim 1,
The first wall protrudes from the third pillar toward the fourth pillar,
The second wall protrudes from the fourth pillar toward the third pillar. According to claim 4,
The first wall protrudes from the third pillar, and the second wall protrudes from the fourth pillar. According to claim 1,
The lens driving device of claim 1 , wherein the support portion includes at least one roller. According to claim 1,
A lens driving device comprising a terminal disposed on the housing, wherein the terminal includes a first terminal electrically connected to one end of the coil and a second terminal electrically connected to the other end of the coil. According to claim 1,
The housing includes a first fixing part disposed on the first post and a second fixing part disposed on the second post, and the coil is wound around the first fixing part and the second fixing part in a ring shape. lens drive unit. According to claim 1,
a second magnet disposed on the bobbin and facing the support part; and
A lens driving device comprising a third magnet disposed on a sidewall of the housing positioned between the third and fourth pillars. According to claim 9,
A lens driving device in which an attractive force acts between the second magnet and the third magnet. According to claim 1,
the housing,
a first contact portion protruding from a sidewall of the housing positioned between the third and fourth columns and contacting the first portion of the support portion; and
and a second contact portion protruding from the sidewall of the housing and contacting the second portion of the support portion. According to claim 1,
The housing includes a first stopper protruding from a sidewall of the housing positioned between the second pillar and the third pillar and a second stopper protruding from a sidewall of the housing positioned between the first pillar and the fourth pillar. including,
The bobbin includes a first groove in which the first stopper is disposed and a second groove in which the second stopper is disposed. According to claim 1,
The support unit includes a plurality of rollers disposed in an optical axis direction. According to claim 1,
The protrusion protrudes from the outer surface of the bobbin,
The bobbin includes a contact portion protruding from an outer surface of the protruding portion facing the support portion and contacting the third portion of the support portion. According to claim 14,
The lens driving device of claim 1 , wherein the contact portion of the bobbin has a columnar shape extending from an upper surface of the protruding portion toward a lower surface of the protruding portion. According to claim 1,
and a blocking member disposed on a sidewall of the housing positioned between the third and fourth pillars and blocking the support member from escaping out of the housing. A housing including first to fourth pillars;
a bobbin disposed within the housing;
a coil disposed between the first and second pillars;
a first magnet disposed on the bobbin to face the coil; and
A support portion disposed between the third and fourth pillars and supporting the bobbin;
the housing,
a side wall positioned between the third pillar and the fourth pillar; and
A first wall and a second wall spaced apart from each other and disposed between the side wall and the bobbin,
The bobbin includes a protrusion positioned between the first wall and the second wall,
The lens driving device of claim 1 , wherein the support portion includes a first portion contacting the first wall, a second portion contacting the second wall, and a third portion contacting the protruding portion of the bobbin. delete lens;
a lens driving device according to any one of claims 1 to 17; and
A camera module including an image sensor. An optical device comprising the camera module according to claim 19.

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