KR102669072B1 - Lens driving device and camera apparatus comprising the same - Google Patents

Abstract

This embodiment includes a housing; A holder disposed within the housing; A magnet placed in a holder; A coil disposed in the housing and facing the magnet; and a first elastic member connecting the housing and the holder, wherein the first elastic member includes an inner portion coupled to the holder, an outer portion coupled to the housing, and a connecting portion connecting the inner portion and the outer portion, and the connecting portion is a first connecting portion. and a second connection portion disposed on opposite sides of the first connection portion, and a third connection portion and a fourth connection portion disposed on opposite sides between the first connection portion and the second connection portion, and the spring constant of the first connection portion is equal to that of the second connection portion. It relates to a lens driving device with a different spring constant.

Description

Lens driving device and camera apparatus comprising the same}

This embodiment relates to a lens driving device and a camera device including the same.

The content described below only provides background information for this embodiment and does not describe prior art.

As various types of portable terminals become widespread and wireless Internet services become commercialized, consumer demands related to portable terminals are also diversifying, and various types of additional devices are being installed on portable terminals.

Among them, a representative example is a camera device that takes photos or videos of a subject. Recent camera modules are equipped with an image stabilization function that prevents the image from shaking due to camera shake. However, in accordance with the miniaturization trend of smartphones, miniaturization of camera devices is also required. However, in conventional camera devices, the structure for moving the lens to drive the image stabilization function, the spring, and the part that creates the electromagnetic force are different from the autofocus module. There is a problem because it is needed separately.

This embodiment seeks to provide a lens driving device that changes the path of light by applying tilting in a zoom actuator using an OIS module and a reflector.

In addition, it is intended to provide a camera device including the lens driving device.

The lens driving device according to this embodiment includes a housing; a holder disposed within the housing; A magnet disposed on the holder; a coil disposed in the housing and facing the magnet; and a first elastic member connecting the housing and the holder, wherein the first elastic member includes an inner portion coupled to the holder, an outer portion coupled to the housing, and a connection portion connecting the inner portion and the outer portion. And the connection part includes a first connection part, a second connection part disposed on the opposite side of the first connection part, and a third connection part and a fourth connection part arranged on opposite sides between the first connection part and the second connection part. , the spring constant of the first connection may be different from the spring constant of the second connection.

The spring constant of the first connection part may be the same as the spring constant of the third connection part, and the spring constant of the second connection part may be the same as the spring constant of the fourth connection part.

The housing includes a first side wall, a second side wall disposed on an opposite side of the first side wall, and a third and fourth side wall disposed on opposite sides between the first side wall and the second side wall, The holder includes a first side facing the first side wall, a second side facing the second side wall, a third side facing the third side wall, and a fourth side facing the fourth side wall. And, the magnet includes a first magnet disposed on the first side and a second magnet disposed on the third side, and the coil includes a first coil disposed on the first side wall and the third side wall. It includes a second coil disposed in, wherein the first connection part is disposed between the first side wall of the housing and the first side of the holder, and the second connection part is between the second side wall of the housing and the holder. It is disposed between the second sides, and the spring constant of the first connection portion may be smaller than that of the second connection portion.

The first connection part may be different from the second connection part in one or more of length, thickness, width, and material.

The inner part includes a first part connected to the first connection part and a second part connected to the second connection part, and the first part is the second part relative to the central axis in the vertical direction of the first elastic member. It can be placed in a position that is asymmetrical to the second part.

The outer part includes a third part connected to the first connection part and a fourth part connected to the second connection part, and the third part is the third part relative to the central axis in the vertical direction of the first elastic member. It can be placed in a position that is asymmetrical to the four parts.

The first elastic member connects the upper part of the holder and the upper part of the housing, and the lens driving device further includes a second elastic member that connects the lower part of the holder and the lower part of the housing, and the second elastic member It includes an inner part coupled to the lower part of the holder, an outer part coupled to the lower part of the housing, and a connection part connecting the inner part of the second elastic member and the outer part of the second elastic member, and the second elastic member The connecting portion of the member includes a fifth connecting portion, a sixth connecting portion disposed on opposite sides of the fifth connecting portion, and a seventh connecting portion and an eighth connecting portion disposed on opposite sides between the fifth connecting portion and the sixth connecting portion. , the fifth connection, the sixth connection, the seventh connection, and the eighth connection may have the same spring constant.

The lens driving device further includes a base disposed on one side of the housing, a terminal whose one end is disposed on the housing and the other end is disposed on the base, the housing includes a groove formed on an outer surface, and the coil It is disposed in the groove, and the terminal includes a first terminal connected to one end of the first coil, a second terminal connected to the other end of the first coil, and a second terminal connected to one end of the second coil. It may include three terminals and a fourth terminal connected to the other end of the second coil.

The lens driving device according to this embodiment includes a cover including an upper plate including a hole and a side plate extending from the upper plate; A holder disposed within the cover; A magnet disposed on the holder; a coil disposed between the holder and the side plate of the cover and facing the magnet; and a first elastic member connected to the holder, wherein the side plate of the cover includes a first side plate, a second side plate disposed on an opposite side of the first side plate, and a space between the first side plate and the second side plate. It includes a third side plate and a fourth side plate disposed on opposite sides of each other, and the holder has a first side facing the first side plate, a second side facing the second side plate, and a third side plate facing the third side plate. It includes a third side and a fourth side facing the fourth side plate, wherein the magnet includes a first magnet disposed on the first side, a second magnet disposed on the second side, and the third side plate. It includes a third magnet disposed on and a fourth magnet disposed on the fourth side, wherein the coil includes a first coil disposed between the first magnet and the first side plate, the second magnet and the first coil. A second coil disposed between the two side plates, a third coil disposed between the third magnet and the third side plate, and a fourth coil disposed between the fourth magnet and the fourth side plate, The size of the first coil may be different from the size of the second coil, or the size of the first magnet may be different from the size of the second magnet.

The camera device according to this embodiment includes first to third lens driving devices arranged in order on an optical path formed between a subject and an image sensor; a reflector coupled to the first lens driving device; a first lens coupled to the second lens driving device; and a second lens coupled to the third lens driving device, wherein the first lens driving device includes a housing; a holder disposed within the housing; a reflector coupled to the holder; A magnet disposed on the holder; a coil disposed in the housing and facing the magnet; and a first elastic member connecting the housing and the holder, wherein the first elastic member includes an inner portion coupled to the holder, an outer portion coupled to the housing, and a connection portion connecting the inner portion and the outer portion. And the connection part includes a first connection part, a second connection part disposed on the opposite side of the first connection part, and a third connection part and a fourth connection part arranged on opposite sides between the first connection part and the second connection part. , the spring constant of the first connection part is different from the spring constant of the second connection part, the second lens driving device includes a first driving part that moves the first lens, and the third lens driving device includes the first driving device. 2 It may include a second driving unit that moves the lens.

Through this embodiment, it is possible to provide a change in the movement path of light in an OIS function or a zoom actuator through a relatively simple structure.

Through this embodiment, the size and manufacturing cost of the camera device can be reduced.

1 is a perspective view of a lens driving device according to this embodiment.
Figure 2 is an exploded perspective view of the lens driving device according to this embodiment.
Figure 3 is a cross-sectional view viewed from XX in Figure 1.
Figure 4 is a perspective view of the elastic member of the lens driving device according to this embodiment.
Figure 5 is a side view showing an exploded state of some components of the lens driving device according to this embodiment.
Figure 6 is a bottom view of the lens driving device according to this embodiment.
Figure 7 is a conceptual diagram showing a holder and an elastic member of the lens driving device according to this embodiment.
Figure 8 is a conceptual diagram comparing the initial state and the tilting state of the holder in Figure 7.
Figure 9 is a perspective view of a camera device according to this embodiment.

Hereinafter, for convenience of explanation, some embodiments of the present invention will be described through exemplary drawings. However, the technical idea of the present invention is not limited to some of the described embodiments.

Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term.

When a component is described as being 'connected' or 'coupled' to another component, that component can be directly connected or coupled to that other component, but there is another component between that component and that other component. It should be understood that elements may be 'connected' or 'combined'.

The 'optical axis direction' used below is defined as the optical axis direction of the lens of the camera device. At this time, the optical axis of the lens may correspond to the optical axis of the image sensor.

The 'autofocus function' used below automatically focuses on the subject by adjusting the distance to the image sensor by moving the lens in the direction of the optical axis according to the distance to the subject so that a clear image of the subject can be obtained on the image sensor. Defined as a function. Meanwhile, 'Auto Focus' can be used interchangeably with 'AF (Auto Focus)'.

The 'image stabilization function' used below is defined as a function that moves or tilts the lens in a direction perpendicular to the optical axis to offset vibration (movement) generated in the image sensor by external force. Meanwhile, 'image stabilization' can be used interchangeably with 'OIS (Optical Image Stabilization)'.

Below, the configuration of the optical device according to this embodiment will be described.

Optical devices include any of mobile phones, mobile phones, smart phones, portable smart devices, digital cameras, laptop computers, digital broadcasting terminals, PDAs (Personal Digital Assistants), PMPs (Portable Multimedia Players), and navigation devices. It can be. However, the type of optical device is not limited to this, and any device for taking videos or photos may be included in the optical device.

The optical device may include a body. The body can form the appearance of the optical device. The main body can accommodate a camera device. A display unit may be disposed on one side of the main body. For example, a display unit and a camera device may be placed on one side of the main body, and a camera device may be additionally placed on the other side of the main body (a side located opposite to the one side).

The optical device may include a display unit. The display unit may be placed on one side of the main body. The display unit can output images captured by the camera device.

Optical devices may include camera devices. The camera device may be placed in the main body. At least a portion of the camera device may be accommodated inside the main body. A plurality of camera devices may be provided. The camera device may be disposed on one side of the main body and the other side of the main body, respectively. A camera device can capture images of a subject.

Below, the configuration of the camera device according to this embodiment will be described.

Figure 9 is a perspective view of a camera device according to this embodiment.

The camera device may be a ‘camera module’. The camera device may include a lens driving device. The camera device may include a plurality of lens driving devices. The camera device may include three lens driving devices. The camera device may include first to third lens driving devices 10, 20, and 30. The camera device may include first to third lens driving devices 10, 20, and 30 arranged in order on the optical path formed between the subject and the image sensor 40.

The first lens driving device 10 may be an actuator for OIS. The first lens driving device 10 can provide an OIS function to the camera device. A reflector 11 may be coupled to the first lens driving device 10. The first lens driving device 10 can move or tilt the reflector 11. The first lens driving device 10 can adjust the tilt of the reflector 11.

The second lens driving device 20 may be an actuator for zoom driving. The second lens driving device 20 can provide a zoom function to the camera device. The second lens 21 may be coupled to the second lens driving device 20. The second lens driving device 20 may include a first driving unit 22 that moves the second lens 21. The second lens driving device 20 includes a housing, a bobbin disposed in the housing and coupled to the second lens 21, a coil disposed in the bobbin, a magnet disposed in the housing, and a bobbin disposed between the housing and the bobbin. It may include balls or rollers. At this time, the coil and magnet may be referred to as the first driving unit 22. Meanwhile, as a modified example, a coil may be placed in the housing and a magnet may be placed in the bobbin.

The third lens driving device 30 may be an actuator for zoom AF. The third lens driving device 30 may provide an AF function. A third lens 31 may be coupled to the third lens driving device 30. The third lens driving device 30 may include a second driving unit 32 that moves the third lens 31. The third lens driving device 30 includes a housing, a bobbin disposed in the housing and coupled to the third lens 31, a coil disposed in the bobbin, a magnet disposed in the housing, and a bobbin disposed between the housing and the bobbin. It may include balls or rollers. At this time, the coil and magnet may be referred to as the second driving unit 32. Meanwhile, as a modified example, a coil may be placed in the housing and a magnet may be placed in the bobbin.

The camera device may include a reflector (11). The reflector 11 may be coupled to the first lens driving device 10. The reflector 11 may be a “prism”. The reflector 11 can reflect light. The reflector 11 may change the path of light incident on the reflector 11 so that the light reaches the image sensor 40. The reflector 11 may be coupled to the holder 200 of the first lens driving device 10. The reflector 11 coupled to the holder 200 may be tilted by driving the first lens driving device 10. That is, the tilt of the reflector 11 can be adjusted by driving the first lens driving device 10.

The camera device may include a lens. The lens may include a plurality of lenses. A plurality of lenses may be coupled to the barrel. A lens module in which a plurality of lenses are coupled to a barrel may be coupled to a lens driving device. A plurality of lenses may form a plurality of groups. In one example, a plurality of lenses may form three groups. Lenses may include group 1 lenses, group 2 lenses, and group 3 lenses. The lens may include first to third lenses 51, 21, and 31. The first to third lenses 51, 21, and 31 may be disposed on the optical path. The first lens 51 may be disposed between the reflector 11 and the second lens 21. The second lens 21 may be coupled to the second lens driving device 20. The third lens 31 may be coupled to the third lens driving device 30. In this embodiment, the second lens 21 and the third lens 31 are movable and the first lens 51 is fixed. A zoom function may be provided by moving the second lens 21 and an AF function may be provided by moving the third lens 31.

The camera device may include an image sensor 40. The image sensor 40 may be arranged to be aligned with the lens. The image sensor 40 may be arranged so that its optical axis coincides with that of the lens. The image sensor 40 may be placed on the optical axis of the lens. The image sensor 40 may be placed on a printed circuit board. The image sensor 40 may be coupled to a printed circuit board using surface mounting technology (SMT). As another example, the image sensor 40 may be coupled to a printed circuit board using flip chip technology. The image sensor 40 may convert light irradiated to an effective image area of the image sensor 40 into an electrical signal. The image sensor 40 may be one of a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, and a CID.

The camera device may include a filter (52). Filter 52 may include an infrared filter. The infrared filter may block light in the infrared region from being incident on the image sensor 40. An infrared filter may be placed between the lens and the image sensor 40.

The camera device may include a printed circuit board. The printed circuit board may be electrically connected to the coil and/or Hall sensor. An image sensor 40 may be placed on the printed circuit board. The printed circuit board may be electrically connected to the image sensor 40.

The camera device may include a control unit. The control unit can control the direction, intensity, and amplitude of the current applied to the coil. The control unit can control the hall sensor. The control unit may perform AF driving, OIS driving, AF feedback control, OIS feedback control, zoom driving, and/or zoom feedback control of the camera device.

Hereinafter, the configuration of the lens driving device according to this embodiment and modified examples will be described with reference to the drawings.

Figure 1 is a perspective view of a lens driving device according to this embodiment, Figure 2 is an exploded perspective view of a lens driving device according to this embodiment, Figure 3 is a cross-sectional view viewed from line X-X of Figure 1, and Figure 4 is a view of the lens driving device according to this embodiment. It is a perspective view of the elastic member of the lens driving device according to the present embodiment, Figure 5 is a side view showing an exploded state of some components of the lens driving device according to the present embodiment, and Figure 6 is a bottom view of the lens driving device according to the present embodiment, FIG. 7 is a conceptual diagram showing the holder and the elastic member of the lens driving device according to this embodiment, and FIG. 8 is a conceptual diagram comparing the initial state and the tilting state of the holder of FIG. 7.

The lens driving device may be a voice coil motor (VCM). The lens driving device may be a ‘lens driving motor’. The lens driving device can replace the first lens driving device 10 of the camera device described above. Alternatively, the lens driving device may replace the second lens driving device 20 or the third lens driving device 30. The lens driving device may be an “OIS module (Optical Image Stabilization module).” The lens driving device may be provided in a zoom camera device and may perform an AF function and/or an OIS function. The lens driving device may be an actuator that moves the lens.

The lens driving device may include a housing 100. The housing 100 may accommodate at least a portion of the holder 200. The housing 100 may be placed outside the holder 200. The housing 100 may be spaced apart from the holder 200 at least in part. The housing 100 may be formed through injection. The housing 100 may include a hole penetrating the center in the optical axis direction. The holder 200 may be movably placed in the hole of the housing 100.

Housing 100 may include a plurality of side walls. The housing 100 may include first to fourth side walls 101, 102, 103, and 104. The housing 100 has a first side wall 101, a second side wall 102 disposed on an opposite side of the first side wall 101, and a second side wall 102 disposed on opposite sides between the first side wall 101 and the second side wall 102. It may include a third side wall 103 and a fourth side wall 104.

Housing 100 may include grooves 110 . Groove 110 may be formed on the outer surface of housing 100. The groove 110 may be a 'coil groove' in which the coil 400 is disposed. The groove 110 may include a shape corresponding to the coil 400 at least in part. A coil 400 may be accommodated in the groove 110.

Housing 100 may include protrusions 120 . The protrusion 120 may protrude from the upper surface of the housing 100. The protrusion 120 may be coupled to the outer portion 520 of the first elastic member 500. The outer portion 520 of the first elastic member 500 may include a hole having a shape corresponding to the protrusion 120. The protrusion 120 may be inserted into the hole of the outer portion 520 of the first elastic member 500. The protrusion 120 may separate the upper surface of the housing 100 from the upper plate 910 of the cover 900. Through this, it is possible to secure a space in which the connection portion 530 of the first elastic member 500 can be moved between the upper surface of the housing 100 and the upper plate 910 of the cover 900.

The lens driving device may include a holder 200. The holder 200 may be a 'bobbin'. Holder 200 may be placed within housing 100. The holder 200 can move relative to the housing 100 . In this embodiment, the holder 200 may be tilted with respect to the housing 100. A reflector 11 may be coupled to the holder 200. Alternatively, a lens may be coupled to the holder 200.

Holder 200 may include multiple sides. The holder 200 has a first side facing the first side wall 101 of the housing 100, a second side facing the second side wall 102, and a third side facing the third side wall 103. and a fourth side facing the fourth side wall 104. The holder 200 has a first side facing the first side plate 921 of the cover 900, a second side facing the second side plate 922, and a third side facing the third side plate 923. and a fourth side facing the fourth side plate 924.

The lens driving device may include a magnet 300. The magnet 300 may be a ‘permanent magnet’. The magnet 300 may be placed in the holder 200. The magnet 300 may face the coil 400. When current is applied to the coil 400, an attractive or repulsive force may act between the magnet 300 and the coil 400 due to electromagnetic interaction. Through this, the holder 200 and the reflector or lens, which move integrally with the magnet 300, can move. That is, the magnet 300 can provide driving force to the holder 200 through electromagnetic interaction with the coil 400. The magnet 300 may be a 'flat magnet' in the shape of a plate.

The magnet 300 may include a plurality of magnets. The magnet 300 may include a first magnet 310 and a second magnet 320. The magnet 300 includes a first magnet 310 disposed on the first side of the holder 200, and a second magnet disposed on the third side of the holder 200 (a side disposed at an angle of 90 degrees to the first side). It may include a magnet 320. In this embodiment, the size of the first magnet 310 and the size of the second magnet 320 may be the same. However, in the modified example, the size of the first magnet 310 and the size of the second magnet 320 may be different.

The lens driving device may include a coil 400. Coil 400 may be disposed in housing 100. The coil 400 may be placed in the groove 110 of the housing 100. The coil 400 may face the magnet 300. The coil 400 may include two lead lines. A terminal 800 may be coupled to each of the two lead wires of the coil 400. The coil 400 can receive current from the printed circuit board through the terminal 800.

Coil 400 may include a plurality of coils. The coil 400 may include a first coil 410 and a second coil 420. The coil 400 may include a first coil 410 disposed on the first side wall 101 of the housing 100 and a second coil 420 disposed on the third side wall 103 of the housing 100. You can. In this embodiment, the size or number of turns of the first coil 410 may be the same as the size or number of turns of the second coil 420. However, in the modified example, the size or number of turns of the first coil 410 may be different from the size or number of turns of the second coil 420. Additionally, in this embodiment, the same current may be supplied to the first coil 410 and the second coil 420. In this embodiment, even in this case, tilting may occur in the holder 200 due to a difference in spring constants between the first connection portion 531 and the second connection portion 532 of the first elastic member 500. The first coil 410 and the second coil 420 may be controlled separately by a controller.

In this embodiment, one or more coils 400 and magnets 300 may be disposed on each axis. When one is placed for each axis, the coil 400 and magnet 300 may be placed in a direction with a low spring constant to maximize the tilting angle. That is, the coil 400 and the magnet 300 may be disposed in the first connection part 531 and the third connection part 533 (see FIG. 7).

In this embodiment, the magnet 300 is placed in the holder 200 and the coil 400 is described as being placed in the housing 100. However, as a modified example, the magnet 300 is placed in the housing 100 and the coil 400 is placed in the housing 100. ) may be placed on the holder 200.

The lens driving device may include a first elastic member 500. The first elastic member 500 may connect the housing 100 and the holder 200. The first elastic member 500 may connect the upper part of the holder 200 and the upper part of the housing 100. The first elastic member 500 may be an ‘upper elastic member’. The first elastic member 500 may be coupled to the upper surface of the holder 200 and the upper surface of the housing 100. The first elastic member 500 may be a leaf spring. The first elastic member 500 may include elasticity at least in part. The first elastic member 500 may be formed of metal.

The first elastic member 500 may include an inner portion 510, an outer portion 520, and a connection portion 530. The first elastic member 500 includes an inner part 510 coupled to the holder 200, an outer part 520 coupled to the housing 100, and a connection part 530 connecting the inner part 510 and the outer part 520. may include. The first elastic member 500 connects the inner part 510 coupled to the upper part of the holder 200, the outer part 520 coupled to the upper part of the housing 100, and the inner part 510 and the outer part 520. It may include a connection portion 530.

The inner portion 510 may include a first portion 511 and a second portion 512. The inner part 510 may include a first part 511 connected to the first connection part 531 and a second part 512 connected to the second connection part 532. At this time, the first part 511 may be disposed in an asymmetric position with the second part 512 with respect to the central axis of the first elastic member 500 (see C in FIG. 4). The virtual straight line connecting the centers of the first part 511 and the first elastic member 500 is an obtuse angle with the virtual straight line connecting the centers of the second part 512 and the first elastic member 500 (FIG. 4 (see a) can be formed.

The outer portion 520 may include a third portion 521 and a fourth portion 522. The outer portion 520 may include a third portion 521 connected to the first connection portion 531 and a fourth portion 522 connected to the second connection portion 532. At this time, the third part 521 may be disposed in an asymmetric position with the fourth part 522 with respect to the central axis C of the first elastic member 500. At this time, the central axis C of the first elastic member 500 may coincide with the optical axis. The virtual straight line connecting the centers of the third part 521 and the first elastic member 500 forms an obtuse angle with the virtual straight line connecting the centers of the fourth part 522 and the first elastic member 500. You can.

The connection part 530 may include a plurality of connection parts. The connection part 530 may include a total of four connection parts. The connection part 530 may include first to fourth connection parts 531, 532, 533, and 534. The connection portion 530 includes a first connection portion 531, a second connection portion 532 disposed on the opposite side of the first connection portion 531, and a second connection portion 532 disposed on opposite sides between the first connection portion 531 and the second connection portion 532. It may include a third connection part 533 and a fourth connection part 534.

In this embodiment, the spring constant (K1 in FIG. 7) of the first connection part 531 may be different from the spring constant (K2) of the second connection part 532. At this time, the spring constant may include any one or more of an x-axis direction spring constant, a y-axis direction spring constant, and a z-axis direction spring constant. That is, for example, the first connection part 531 and the second connection part 532 may differ only in the x-axis direction spring constant, or in another example, the x-axis direction spring constant, y-axis direction spring constant, and z-axis direction spring constant may all be different. You may. The first connection part 531 may be different from the second connection part 532 in one or more of length, thickness, width, and material. At this time, the length may be the length in the extension direction of the connection part. The width may be the length in a direction perpendicular to the extension direction of the connection part. The thickness may be the length of the connection part in the vertical direction (Z-axis direction). The spring constant (K1) of the first connection portion (531) may be equal to the spring constant (K3) of the third connection portion (533). The spring constant K2 of the second connection part 532 may be equal to the spring constant K4 of the fourth connection part 534. The spring constant K3 of the third connection part 533 may be different from the spring constant K4 of the fourth connection part 534.

In this embodiment, the length of the first connection part 531 connecting the first part 511 and the third part 521 is the second connection part 532 connecting the second part 512 and the fourth part 522. ) can be longer than That is, the spring constant K1 of the first connection part 531 may be smaller than the spring constant K2 of the second connection part 532. In a modified example, the thickness of the first connection part 531 may be thinner than the thickness of the second connection part 532. In another modification, the width of the first connection part 531 may be narrower than the width of the second connection part 532. In another variation, the first connection portion 531 and the second connection portion 532 may be manufactured from different materials. As an example, the first connection part 531 may be made of copper and the second connection part 532 may be made of sus. In modified examples, the first connection portion 531 and the second connection portion 532 may be formed to have the same length. However, this embodiment and two or more of the modified examples may be mixed. For reference, the spring constant may be inversely proportional to the length, proportional to the cube of the thickness, and proportional to the width.

In this embodiment, the length of the third connection part 533 may be longer than the fourth connection part 534. That is, the spring constant K3 of the third connection part 533 may be smaller than the spring constant K4 of the fourth connection part 534. In a modified example, the thickness of the third connection part 533 may be thinner than the thickness of the fourth connection part 534. In another modification, the width of the third connection part 533 may be narrower than the width of the fourth connection part 534. In another variation, the third connection portion 533 and the fourth connection portion 534 may be manufactured from different materials. As an example, the third connection part 533 may be made of copper and the fourth connection part 534 may be made of sus. In modified examples, the third connection portion 533 and the fourth connection portion 534 may be formed to have the same length. However, this embodiment and two or more of the modified examples may be mixed.

In this embodiment, the first connection portion 531 may be disposed between the first side wall 101 of the housing 100 and the first side of the holder 200. The first connection portion 531 may be disposed corresponding to the space between the first side wall 101 of the housing 100 and the first side of the holder 200. The second connection portion 532 may be disposed between the second side wall 102 of the housing 100 and the second side of the holder 200 (a side disposed opposite to the first side). The second connection portion 532 may be disposed corresponding to the space between the second side wall 102 of the housing 100 and the second side of the holder 200. At this time, the spring constant K1 of the first connection part 531 may be smaller than the spring constant K2 of the second connection part 532.

In this embodiment, the first part 511 of the inner part 510 fixed to the holder 200 is within the first stroke (see stroke1 in FIG. 7) corresponding to the spring constant K1 of the first connection part 531. You can move. Meanwhile, the second portion 512 may move within a second stroke (stroke2) corresponding to the spring constant (K2) of the second connection portion (532). At this time, the first stroke may be larger than the second stroke. Through this, when both the first part 511 and the second part 512 move to the maximum, the holder 200 can have a predetermined tilting angle (see b in FIG. 8) compared to the initial state. In this embodiment, the OIS function may be performed according to the tilting movement of the holder 200. In this embodiment, the spring constant K1 of the first connection part 531 and the spring constant K2 of the second connection part 532 are different, so the same current is applied to the first coil 410 and the second coil 420. Even so, tilting may be caused in the holder 200. Additionally, the tilting amount of the holder 200 may be controlled by applying different currents to the first coil 410 and the second coil 420. Meanwhile, as a modified example, the spring constants of the first connection part 531 and the second connection part 532 are made the same, and different currents are applied to the first coil 410 and the second coil 420 to tilt the holder 200. It can be induced.

The lens driving device may include a second elastic member 600. The second elastic member 600 may connect the housing 100 and the holder 200. The second elastic member 600 may connect the lower part of the holder 200 and the lower part of the housing 100. The second elastic member 600 may be a ‘lower elastic member’. The second elastic member 600 may be coupled to the lower surface of the holder 200 and the lower surface of the housing 100. The second elastic member 600 may be a leaf spring. The second elastic member 600 may include elasticity at least in part. The second elastic member 600 may be formed of metal.

The second elastic member 600 may include an inner part 610, an outer part 620, and a connection part 630. The second elastic member 600 connects the inner part 610 coupled to the lower part of the holder 200, the outer part 620 coupled to the lower part of the housing 100, and the inner part 610 and the outer part 620. It may include a connection portion 630.

The connection part 630 may include a plurality of connection parts. The connection part 630 may include a total of four connection parts. The connection part 630 may include fifth to eighth connection parts 631, 632, 633, and 634. The connection portion 630 includes a fifth connection portion 631, a sixth connection portion 632 disposed on the opposite side of the fifth connection portion 631, and a fifth connection portion 631 and a sixth connection portion 632 located on opposite sides between the fifth connection portion 631 and the sixth connection portion 632. It may include a seventh connection part 633 and an eighth connection part 634.

In this embodiment, the fifth connection part 631, the sixth connection part 632, the seventh connection part 633, and the eighth connection part 634 may have the same spring constant. However, in the modified example, the spring constant of the fifth connection part 631 may be different from the spring constant of the sixth connection part 632. The fifth connection part 631 may be different from the sixth connection part 632 in one or more of length, thickness, width, and material. The spring constant of the fifth connection part 631 may be the same as the spring constant of the seventh connection part 633. The spring constant of the sixth connection part 632 may be the same as the spring constant of the eighth connection part 634. Additionally, the spring constant of the seventh connection part 633 may be different from the spring constant of the eighth connection part 634.

The lens driving device may include a base 700. Base 700 may be placed on one side of housing 100. Base 700 may be placed below housing 100. Base 700 may be placed below holder 200. The base 700 may be spaced apart from the holder 200 at least in part. Base 700 may be coupled to housing 100. At least a portion of the base 700 may be formed in a shape that corresponds to the corresponding portion of the housing 100. The base 700 may be formed through injection.

The base 700 may include a step portion 710. The step portion 710 may be formed at or below the side of the base 700. The lower end of the side plate 920 of the cover 900 may be placed in the step portion 710. The step portion 710 may overlap the side plate of the cover 900 in the horizontal direction.

The base 700 may include a pillar portion 720. The pillar portion 720 may extend from the upper surface of the base 700. The pillar portion 720 may be disposed outside the holder 200. The pillar portion 720 may be formed integrally with the body portion of the base 700. The pillar portion 720 may be disposed at each of the four corner portions of the body portion of the base 700. The pillar part 720 may include a plurality of pillar parts. The plurality of pillar parts may include four pillar parts. The plurality of pillar parts may include first to fourth pillar parts.

Base 700 may include a hole 730. The hole 730 may penetrate the base 700 in the vertical direction (optical axis direction). The hole 730 may be a ‘terminal hole’ where the terminal 800 is placed. A terminal 800 may be placed in the hole 730. The terminal 800 may be inserted into the hole 730. The hole 730 may be replaced with a groove.

The lens driving device may include a terminal 800. The terminal 800 may have one end disposed on the housing 100 and the other end may be disposed on the base 700. One end of the terminal 800 may be coupled to the coil 400 and the other end of the terminal 800 may be coupled to a printed circuit board. That is, the terminal 800 can electrically connect the coil 400 and the printed circuit board. The terminal 800 may be formed of a conductive material. The terminal 800 may be formed of metal. The terminal 800 may be arranged in a vertical direction (optical axis direction) along the side of the housing 100.

Terminal 800 may include a plurality of terminals. The terminal 800 may include a total of four terminals. The terminal 800 may include first to fourth terminals 810, 820, 830, and 840. The terminal 800 includes a first terminal 810 connected to one end of the first coil 410, a second terminal 820 connected to the other end of the first coil 410, and a second coil 420. ) may include a third terminal 830 connected to one end of the coil, and a fourth terminal 840 connected to the other end of the second coil 420.

The lens driving device may include a cover 900. The cover 900 may cover at least a portion of the base 700. Cover 900 may be combined with base 700. The cover 900 can accommodate the holder 200 therein. The cover 900 may form the exterior of the lens driving device. The cover 900 may have a hexahedral shape with an open lower surface. The cover 900 may be formed of a metal plate. The cover 900 may be connected to the ground portion of the printed circuit board. Through this, the cover 900 can be grounded. The cover 900 can block electromagnetic interference (EMI). At this time, the cover 900 may be referred to as an 'EMI shield can'.

The cover 900 may include a top plate 910 and a side plate 920. The cover 900 may include a top plate 910 including a hole, and a side plate 920 extending downward from the outer periphery or edge of the top plate 910.

The side plate 920 may include a plurality of side plates. The side plate 920 may include a total of four side plates. The side plate 920 may include first to fourth side plates 921, 922, 923, and 924. The side plate 920 includes a first side plate 921, a second side plate 922 disposed on the opposite side of the first side plate 921, and a second side plate 922 disposed on opposite sides between the first side plate 921 and the second side plate 922. It may include a third side plate 923 and a fourth side plate 924.

In the lens driving device according to the first modification, the magnet 300 includes a first magnet disposed on the first side of the holder 200, a second magnet disposed on the second side, and a third magnet disposed on the third side. It may include a magnet and a fourth magnet disposed on the fourth side. The coil 400 includes a first coil disposed between the first magnet and the first side plate 921 of the cover 900, a second coil disposed between the second magnet and the second side plate 922, and a third coil. It may include a third coil disposed between the magnet and the third side plate, and a fourth coil disposed between the fourth magnet and the fourth side plate 924. At this time, the size of the first coil may be different from the size of the second coil. In this case, even if the same current is applied to the first coil and the second coil, tilting may be induced in the holder 200. In the first modification, the first to fourth connection parts 531, 532, 533, and 534 of the first elastic member 500 may have the same spring constant. Alternatively, the spring constant K1 of the first connection part 531 may be different from the spring constant K2 of the second connection part 532.

In the lens driving device according to the second modification, like the first modification, the magnet 300 may include first to fourth magnets and the coil 400 may include first to fourth coils. However, the size of the first magnet may be different from the size of the second magnet. In this case, even if the same current is applied to the first coil and the second coil, tilting may be induced in the holder 200. In other words, it can effectively correspond to the first modification. Meanwhile, the first variant and the second variant may be mixed. That is, the size of the first coil and the size of the second coil may be different, and the size of the first magnet and the size of the second magnet may be different. Furthermore, the first to fourth connection parts 531, 532, 533, and 534 of the first elastic member 500 may have the same spring constant. Alternatively, the spring constant K1 of the first connection part 531 may be different from the spring constant K2 of the second connection part 532.

In the lens driving device according to the third modification, the coil 400 may include first to fourth coils that are individually controlled. At this time, the control unit may induce tilting of the holder 200 by varying the amount of current applied to the first coil and the amount of current applied to the second coil.

In the above, even though all the components constituting the embodiment of the present invention have been described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, as long as it is within the scope of the purpose of the present invention, all of the components may be operated by selectively combining one or more of them. In addition, terms such as 'include', 'comprise', or 'have' described above mean that the corresponding component may be present, unless specifically stated to the contrary, and therefore do not exclude other components. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology and, unless explicitly defined in the present invention, should not be interpreted in an idealized or overly formal sense.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: Housing 200: Holder
300: Magnet 400: Coil
500: first elastic member 600: second elastic member
700: Base 800: Terminal
900: Cover

Claims (10)

housing;
a holder disposed within the housing;
A magnet disposed on the holder;
a coil disposed in the housing and facing the magnet; and
Includes a first elastic member connecting the housing and the holder,
The first elastic member includes an inner part coupled to the holder, an outer part coupled to the housing, and a connection part connecting the inner part and the outer part,
The connection portion includes a first connection portion, a second connection portion disposed on opposite sides of the first connection portion, and a third connection portion and a fourth connection portion disposed on opposite sides between the first connection portion and the second connection portion,
The spring constant of the first connection is different from the spring constant of the second connection,
The inner part includes a first part connected to the first connection part and a second part connected to the second connection part,
A lens driving device wherein the first part is disposed in an asymmetrical position with respect to the second part with respect to the central axis in the vertical direction of the first elastic member. According to paragraph 1,
The spring constant of the first connection is the same as the spring constant of the third connection,
A lens driving device wherein the spring constant of the second connection part is the same as the spring constant of the fourth connection part. According to paragraph 1,
The housing includes a first side wall, a second side wall disposed on opposite sides of the first side wall, and a third and fourth side walls disposed on opposite sides between the first side wall and the second side wall,
The holder has a first side facing the first side wall, a second side facing the second side wall, a third side facing the third side wall, and a fourth side facing the fourth side wall. Contains,
The magnet includes a first magnet disposed on the first side and a second magnet disposed on the third side,
The coil includes a first coil disposed on the first side wall and a second coil disposed on the third side wall,
The first connection portion is disposed between the first side wall of the housing and the first side of the holder, and the second connection portion is disposed between the second side wall of the housing and the second side of the holder,
A lens driving device wherein the spring constant of the first connection portion is smaller than that of the second connection portion. According to paragraph 1,
A lens driving device wherein the first connection part is different from the second connection part in one or more of length, thickness, width, and material. According to paragraph 1,
A lens driving device wherein an imaginary straight line connecting the first part and the center of the first elastic member forms an obtuse angle with an imaginary straight line connecting the second part and the center of the first elastic member. According to paragraph 1,
The outer portion includes a third part connected to the first connection part and a fourth part connected to the second connection part,
A lens driving device wherein the third part is disposed in an asymmetrical position with respect to the fourth part with respect to the vertical central axis of the first elastic member. According to paragraph 1,
The first elastic member connects the upper part of the holder and the upper part of the housing,
The lens driving device further includes a second elastic member connecting the lower part of the holder and the lower part of the housing,
The second elastic member includes an inner part coupled to the lower part of the holder, an outer part coupled to the lower part of the housing, and a connection part connecting the inner part of the second elastic member and the outer part of the second elastic member. ,
The connection portion of the second elastic member includes a fifth connection portion, a sixth connection portion disposed on opposite sides of the fifth connection portion, and a seventh connection portion and an eighth connection portion disposed on opposite sides between the fifth connection portion and the sixth connection portion. Includes a connection part,
The fifth connection part, the sixth connection part, the seventh connection part, and the eighth connection part have the same spring constant. According to paragraph 3,
The lens driving device further includes a base disposed on one side of the housing, a terminal having one end disposed on the housing and the other end disposed on the base,
The housing includes a groove formed on the outer surface,
The coil is disposed in the groove,
The terminal includes a first terminal connected to one end of the first coil, a second terminal connected to the other end of the first coil, a third terminal connected to one end of the second coil, and the first terminal. A lens driving device including a fourth terminal connected to the other end of the second coil. A cover including a top plate including a hole and a side plate extending from the top plate;
a housing disposed within the cover;
a holder disposed within the housing;
A magnet disposed on the holder;
a coil disposed between the holder and the side plate of the cover and facing the magnet; and
It includes a first elastic member connected to the holder,
The side plate of the cover includes a first side plate, a second side plate disposed on opposite sides of the first side plate, and a third and fourth side plates disposed on opposite sides between the first side plate and the second side plate. do,
The holder has a first side facing the first side plate, a second side facing the second side plate, a third side facing the third side plate, and a fourth side facing the fourth side plate. Contains,
The magnet includes a first magnet disposed on the first side, a second magnet disposed on the second side, a third magnet disposed on the third side, and a fourth magnet disposed on the fourth side. Contains,
The coil includes a first coil disposed between the first magnet and the first side plate, a second coil disposed between the second magnet and the second side plate, and a third coil disposed between the third magnet and the third side plate. It includes a third coil disposed, and a fourth coil disposed between the fourth magnet and the fourth side plate,
The size of the first coil is different from the size of the second coil, or the size of the first magnet is different from the size of the second magnet,
The first elastic member includes an inner part coupled to the holder, an outer part coupled to the housing, and a connection part connecting the inner part and the outer part,
The connection portion includes a first connection portion and a second connection portion disposed opposite to the first connection portion,
The inner part includes a first part connected to the first connection part and a second part connected to the second connection part,
A lens driving device wherein an imaginary straight line connecting the first part and the center of the first elastic member forms an obtuse angle with an imaginary straight line connecting the second part and the center of the first elastic member. first to third lens driving devices arranged in order on the optical path formed between the subject and the image sensor;
a reflector coupled to the first lens driving device;
a first lens coupled to the second lens driving device; and
Includes a second lens coupled to the third lens driving device,
The first lens driving device is
housing;
a holder disposed within the housing;
a reflector coupled to the holder;
A magnet disposed on the holder;
a coil disposed in the housing and facing the magnet; and
Includes a first elastic member connecting the housing and the holder,
The first elastic member includes an inner part coupled to the holder, an outer part coupled to the housing, and a connection part connecting the inner part and the outer part,
The connection portion includes a first connection portion, a second connection portion disposed on opposite sides of the first connection portion, and a third connection portion and a fourth connection portion disposed on opposite sides between the first connection portion and the second connection portion,
The spring constant of the first connection is different from the spring constant of the second connection,
The second lens driving device includes a first driving part that moves the first lens,
The third lens driving device is a camera device including a second driving unit that moves the second lens.

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