KR102438026B1 - Lens moving apparatus - Google Patents

Abstract

In the embodiment, a housing, a bobbin disposed in the housing, a coil disposed on the bobbin, a first magnet disposed to overlap the bobbin in a first direction perpendicular to the optical axis, a second magnet disposed on the bobbin, and a second magnet are detected and an elastic member including a position detecting sensor, an outer frame coupled to the housing, an inner frame coupled to the bobbin, and a connecting portion connecting the outer frame and the inner frame, and a damper at least partially disposed in the connecting portion. a first end engaging with the outer frame and a second end engaging with the inner frame, wherein the inner frame includes a hole disposed adjacent to the second end of the connecting portion, and the damper includes a first end of the connecting portion rather than a hole of the inner frame. Disposed closer to the end, the bobbin includes a groove in which at least a portion of the second magnet is disposed.

Description

LENS MOVING APPARATUS

This embodiment relates to a lens driving device.

In recent years, the development of IT products such as a mobile phone, a smart phone, a tablet PC, and a notebook equipped with a miniature digital camera has been actively carried out.

In the case of a conventional IT product with a built-in miniature digital camera, an image sensor that converts external light into a digital image or digital image and a lens driving device that aligns the focal length of the lens by adjusting the distance between the lens are built-in.

The lens driving device is provided with an upper elastic member and a lower elastic member, the upper elastic member and the lower elastic member may include an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connection portion connecting the inner frame and the outer frame have.

At this time, the connection part may be bent at least once to form a pattern of a certain shape, and the bobbin is elastically supported in the ascending and/or descending operation in the first direction in the optical axis direction through a change in the position of the connection part and fine deformation. can be

However, the conventional lens driving apparatus has the following problems.

As described above, when the connection part is formed in a plurality of constant patterns, the above-described patterns may vibrate at a constant frequency when the connection part vibrates, and thus noise or oscillation may occur.

The embodiment is intended to reduce noise and eliminate oscillation when driving a motor when driving in a lens driving device.

A lens driving device according to an embodiment includes a housing; a bobbin disposed within the housing; a coil disposed on the bobbin; a first magnet disposed to overlap the bobbin in a first direction perpendicular to the optical axis; a second magnet disposed on the bobbin; a position detection sensor for detecting the position of the second magnet; an elastic member including an outer frame coupled to the housing, an inner frame coupled to the bobbin, and a connecting portion connecting the outer frame and the inner frame; and a damper disposed at least in part on the connecting portion, wherein the connecting portion includes a first end coupled to the outer frame and a second end coupled to the inner frame, and the inner frame includes the second end of the connecting portion. a hole disposed adjacent to an end, wherein the damper is disposed closer to the first end of the connecting portion than the hole of the inner frame, and the bobbin includes a groove in which at least a portion of the second magnet is disposed do.

The outer frame of the elastic member may include a hole disposed adjacent to the first end of the connecting portion, and the damper may be disposed closer to the hole of the outer frame than the hole of the inner frame.

The damper may contact the connection part and the housing. The elastic member may include an upper elastic member disposed above the bobbin and an upper side of the housing, and a lower elastic member disposed below the bobbin and below the housing, wherein the lower elastic member includes a first lower elastic member. It may include a member and a second lower elastic member.

The housing includes a first side surface overlapping the second side surface in the first direction, and a third side surface disposed in a second direction perpendicular to the first side surface, and the first magnet is the first side surface of the housing. The first magnet unit may include a second magnet unit disposed on the second side surface of the housing, and the first magnet may not be disposed on the third side surface of the housing.

The damper may be spaced apart from the inner frame.

The third side surface of the housing may include an opening overlapping the second magnet in the second direction.

The damper may be disposed closer to the first end of the connecting portion than the second end of the connecting portion.

At least a portion of the position detection sensor may be disposed in the opening of the third side surface of the housing.

The connecting portion may include a first portion and a second portion having a width greater than a width of the first portion. A portion of the coil may be disposed between the second magnet and the position detection sensor.

The lens driving device may include a circuit board electrically connected to the elastic member, the position detection sensor may be disposed on the circuit board, and the coil may be electrically connected to the elastic member.

A lens driving device according to another embodiment includes a housing; a bobbin disposed within the housing; a coil disposed on the bobbin; a first magnet disposed to overlap the bobbin in a first direction perpendicular to the optical axis; a second magnet disposed on the bobbin; a position detection sensor for detecting the position of the second magnet; an elastic member coupled to the bobbin and the housing, the elastic member including a first frame coupled to the housing, a second frame coupled to the bobbin, and a connecting portion connecting the first frame and the second frame; and a damper disposed on at least a portion of the connection part, wherein the connection part includes a first end connected to the first frame and a second end connected to the second frame, and the housing includes the second end of the connection part. and a first protrusion coupled to a first hole of the first frame disposed adjacent to a first end, wherein the bobbin engages with a second hole of the second frame disposed adjacent to the second end of the connecting portion and a second protrusion, wherein the damper is disposed closer to the first protrusion of the housing than the second protrusion of the bobbin, and the bobbin comprises a groove in which at least a portion of the second magnet is disposed.

The damper may be disposed closer to the first end of the connecting portion than the second end of the connecting portion, and may be spaced apart from the second frame.

The first magnet may not be disposed on one side of the housing disposed in a second direction perpendicular to the first direction.

A lens driving device according to another embodiment includes a housing; a bobbin disposed within the housing; a coil disposed on the bobbin; a first magnet disposed to overlap the bobbin in a first direction perpendicular to the optical axis; a second magnet disposed on the bobbin; a position detection sensor overlapping the second magnet in a second direction perpendicular to the optical axis and the first direction; an elastic member including a first frame coupled to the housing, a second frame coupled to the bobbin, and a connection portion disposed between the first frame and the second frame; and a damper at least partially in contact with the connection portion of the elastic member, wherein the damper is disposed closer to the first frame than the second frame, and the damper does not contact the second frame.

In the lens driving device according to the embodiment, the upper elastic member or the lower elastic member is manufactured from the same material or integrally as that of the FPCB, or a damper and a parasitic region in the connection part in the upper elastic member or the lower elastic member are provided, when driving a vibration motor, etc. Noise is suppressed and oscillation phenomenon can be prevented.

1 is a schematic perspective view of a lens driving device according to an embodiment of the present embodiment;
2 is a schematic exploded perspective view of a lens driving device according to an embodiment of the present embodiment;
3 is a schematic perspective view of the lens driving device with the cover member removed in FIG. 1;
Figure 4 is a schematic plan view of Figure 3,
5 is a schematic perspective view of a housing according to an embodiment of the present embodiment;
6 is a schematic perspective view of the housing viewed from an angle different from FIG. 5;
7 is a schematic bottom perspective view of a housing according to an embodiment of the present embodiment;
8 is a schematic exploded perspective view of a housing according to an embodiment of the present embodiment;
9A to 9C are schematic plan views of an upper elastic member according to embodiments of the present embodiment;
10A and 10B are schematic plan views of a lower elastic member according to embodiments of the present embodiment;
11A to 11C are diagrams schematically illustrating the arrangement of a damper according to embodiments of the present embodiment;
12 is a schematic perspective view of a bobbin according to one embodiment of the present embodiment;
13 is a schematic bottom perspective view of a bobbin according to an embodiment of the present embodiment;
14 is a schematic exploded perspective view of a bobbin according to an embodiment of the present embodiment;
15 is a partially enlarged perspective view of FIG. 14;
16 is a partially enlarged bottom view of FIG. 14;
17 is a schematic partial enlarged perspective view of a receiving groove according to an embodiment of the present embodiment;
18 is a schematic longitudinal cross-sectional view of a bobbin according to an embodiment of the present embodiment;
19 is a view showing a relationship between a gain and a phase in the lens driving device according to the embodiment;
20A to 20C are diagrams illustrating an oscillation phenomenon that occurs when a gain is gradually increased in a lens driving device;
21 is a view showing that the oscillation phenomenon is prevented because the frequency characteristic is changed in the lens driving device according to the embodiment.

Hereinafter, a preferred embodiment of the present embodiment will be described so that a person skilled in the art can easily implement it with reference to the accompanying drawings. In the accompanying drawings, it may be noted that the reference numbers indicated for the configuration are used as much as possible when indicating the same configuration in other drawings. In addition, in the description of the present embodiment, if it is determined that a detailed description of a related known function or a known configuration may unnecessarily obscure the gist of the present embodiment, the detailed description thereof may be omitted.

In addition, certain features presented in the drawings are enlarged, reduced, or simplified for ease of description, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily appreciate these details.

For reference, a Cartesian coordinate system (x, y, z) may be used in FIGS. 1 to 26 . In the drawings, the x-axis and the y-axis mean a plane perpendicular to the optical axis. For convenience, the optical axis direction (z-axis direction) may be referred to as a first direction, the x-axis direction as a second direction, and the y-axis direction as a third direction. .

And, hereinafter, the inner or inner direction or the inner part means a direction or part relatively toward the center of the lens driving device based on the plan view of the lens driving device, and the outward or outward direction or the outer part means a plan view of the lens driving device may refer to a direction or a portion relatively far away from the center of the lens driving device based on .

1 is a schematic perspective view of a lens driving device according to an embodiment of the present embodiment, FIG. 2 is a schematic exploded perspective view of a lens driving device according to an embodiment of the present embodiment, and FIG. 3 is a cover member in FIG. A schematic perspective view of the removed lens driving device, FIG. 4 is a schematic plan view of FIG. 3 , FIG. 5 is a schematic perspective view of a housing according to an embodiment of the present embodiment, and FIG. 6 is a housing viewed from an angle different from FIG. 5 . is a schematic perspective view of a, FIG. 7 is a schematic bottom perspective view of a housing according to an embodiment of the present embodiment, FIG. 8 is a schematic exploded perspective view of a housing according to an embodiment of the present embodiment, and FIGS. 9A to 9C are It is a schematic plan view of an upper elastic member according to embodiments of the present embodiment, FIGS. 10A and 10B are schematic plan views of a lower elastic member according to embodiments of the present embodiment, and FIGS. 11A to 11C are this embodiment A diagram schematically illustrating an arrangement of a damper according to example embodiments.

The lens driving device according to the present embodiment is a device that adjusts the distance between the lens and the image sensor in the camera module so that the image sensor is positioned at the focal length of the lens. That is, the lens driving device is a device that performs an auto-focusing function.

1 to 4 , the lens driving device 1000 according to the present embodiment includes a cover member 300 , an upper elastic member 150 , a bobbin 110 , and provided in the bobbin 110 . The coil 120 , the housing 140 , the driving magnet 130 and the printed circuit board 170 provided in the housing 140 , the lower elastic member 160 , the base 210 and the bobbin 110 . It may include a displacement sensing unit that determines the amount of displacement in the optical axis direction (ie, the first direction), and a damping unit 410 serving as an attenuator.

The cover member 300 may have a box shape as a whole, and may be configured to be coupled to the upper portion of the base 210 . The cover member 300 includes an upper elastic member 150 , a bobbin 110 , a coil 120 provided in the bobbin 110 , a housing 140 , and the housing in an accommodation space formed together with the base 210 . The driving magnet 130 and the printed circuit board 170 provided in the 140 can be accommodated.

The above-described driving magnet 130 may be referred to as a first magnet, and a sensing magnet 190 to be described later may be referred to as a second magnet.

The cover member 300 may have an opening on its upper surface through which a lens coupled to the bobbin 110 can be exposed to external light. In addition, a window made of a light-transmitting material may be provided in the opening, thereby preventing foreign substances such as dust or moisture from penetrating into the camera module.

The cover member 300 may include a first groove portion 310 in the lower portion. At this time, as will be described later, when the cover member 300 and the base are coupled, the base 210 is placed in contact with the first groove portion 310 (ie, a position corresponding to the first groove portion 310 ). Two grooves 211 may be provided. When the cover member 300 and the base are coupled, a concave portion having a predetermined area may be formed through the coupling of the first groove portion 310 and the second groove portion 211 . An adhesive member having a viscosity may be applied to the recess. That is, the adhesive member applied to the concave portion fills a gap between the surfaces facing each other of the cover member 300 and the base 210 through the concave portion, so that the cover member 300 is the base 210 . It is possible to seal between the cover member 300 and the base 210 while being coupled to, and also, as the cover member and the base are coupled, the side surface may be sealed.

In addition, a third groove portion 320 may be formed on a surface of the cover member 300 corresponding to the terminal surface of the printed circuit board 170 so as not to interfere with the plurality of terminals formed on the terminal surface. The third groove portion 320 may be concavely formed on the entire surface facing the terminal surface, and the adhesive member is applied to the inside of the third groove portion to form the cover member 300, the base 210, and the printed circuit board ( 170) can be sealed, and the side surface can be sealed while the cover member and the base are coupled.

On the other hand, the first groove portion 310 to the third groove portion 320 are formed in the base 210 and the cover member 300, respectively, but are not limited thereto, and are formed only in the base 210 in a similar shape or , may be configured to be formed only on the cover member 300 .

The base 210 may be provided in a rectangular shape as a whole, and may be combined with the cover member 300 to form an accommodation space for the bobbin 110 and the housing 140 .

A stepped portion protruding outward with a predetermined thickness may be provided to surround the lower edge of the base 210 . The predetermined thickness of the stepped portion is the same as the side thickness of the cover member 300 , and when the cover member 300 is coupled to the base 210 , the side surface of the cover member 300 is the upper portion of the stepped portion. Or it may be seated or contacted or placed or coupled to the side. For this reason, it is possible to guide the cover member 300 coupled to the upper side of the stepped portion, and further, the end of the cover member 300 may be coupled to be in surface contact, and the end of the cover member may have a bottom surface or a side surface. may include In this case, the step portion and the end of the cover member 300 may be adhesively fixed and sealed by an adhesive or the like.

In the step portion, a second groove portion 211 may be formed at a position corresponding to the first groove portion 310 of the cover member 300 . As described above, the second groove portion 211 may be combined with the first groove portion 310 of the cover member 300 to form a groove portion, and may form a space in which the adhesive member is filled.

The base 210 may have an opening near the center. The opening may be formed at a position corresponding to a position of an image sensor disposed in the camera module.

In addition, the base 210 may include four guide members 216 protruding at right angles to a predetermined height in the upper direction from the four corners. The guide member may have a polygonal prism shape. The guide member 216 may be inserted, fastened, or coupled to a lower guide groove 148 of the housing 140 to be described later. In this way, due to the guide member 216 and the lower guide groove 148 , when the housing 140 is seated or disposed on the upper portion of the base 210 , the housing 140 on the base 210 is coupled. It is possible to guide the position, and at the same time, it is possible to prevent the housing 140 from being separated from the reference position to be mounted due to vibration or the like during the operation process of the lens driving device 100 or due to an operator's mistake during the coupling process.

As shown in FIGS. 4 to 8 , the housing 140 may have an overall hollow column shape (eg, a hollow square column shape as shown in the drawings). The housing 140 is configured to support at least two driving magnets 130 and a printed circuit board 170 , and a bobbin 110 therein is movable in a first direction with respect to the housing 140 . The bobbin 110 may be accommodated.

2 , the upper elastic member 150 and the printed circuit board 170 are separated and illustrated for convenience of understanding, but as shown in FIGS. 4 and 8 , the upper elastic member 150 is the printed circuit board 150 . ) and may be integrally formed.

The housing 140 may have four flat sides. The side surface of the housing 140 may be formed to have an area corresponding to or larger than that of the driving magnet 130 .

As shown in FIG. 8 , a through hole 141a or a groove for a magnet in which the driving magnet 130 is seated, disposed or fixed is provided on each of the opposite side surfaces of the four side surfaces 141 of the housing 140 . can be The through-hole 141a or groove for the magnet may have a size and shape corresponding to the driving magnet 130 , and may also have a shape capable of guiding. A first driving magnet 131 and a second driving magnet 132, that is, a total of two driving magnets 130 may be mounted in each of the through-holes 141a for the magnets.

And, a through hole for a sensor into which a position detection sensor 180, which will be described later, is inserted, disposed, fixed, or seated on one side or other surfaces other than the both sides at right angles to the both sides among the four side surfaces 141 of the housing 140 A 141b may be provided, and when the printed circuit board 170 is disposed to extend to the inner surface of the housing in an embodiment to be described later, the position detection sensor 180 may be disposed in the extended portion. The sensor through hole 141b preferably has a size and shape corresponding to a position detection sensor 180 to be described later. In addition, at least one mounting protrusion 149 for allowing the printed circuit board 170 to be mounted or disposed or temporarily fixed or fixed may be provided on the one side. The mounting protrusion 149 is inserted into a mounting through-hole 173 formed in a printed circuit board 170 to be described later, wherein the mounting through-hole 173 and the mounting protrusion 149 are shape-fitted. It can be said that it is preferable to be coupled by a method or an interference fit method, but only a simple guide function may be performed.

Here, the other side opposite to the one side among the four side surfaces 141 of the housing 140 may be configured as a flat plane, but is not limited thereto.

As a further embodiment of the housing 140 , on each of the opposite side surfaces of the four side surfaces 141 of the housing 140 , the driving magnet 130 is seated, disposed, or fixed through holes for the first and second magnets. (141a, 141a') may be provided. And, among the four side surfaces 141 of the housing 140, one side perpendicular to the both sides or a side other than the both sides has a third through-hole for a magnet and a through-hole for the third magnet, which is formed to be spaced apart by a predetermined distance. A through hole 141b may be provided. In addition, a through hole for a fourth magnet may be provided on the other side facing the one side among the four side surfaces 141 of the housing 140 .

That is, four through-holes for magnets and one through-hole 141b for sensors may be provided on the four side surfaces 141 of the housing 140 .

At this time, the first through-hole 141a for the magnet and the second through-hole 141a' for the magnet have the same size and the same shape, and (almost) the same over the entire lateral length of the side surface of the housing 140 has a lateral length. On the other hand, the through-hole for the third magnet and the through-hole for the fourth magnet have the same size and the same shape, than the first through-hole 141a for the magnet and the through-hole 141a' for the second magnet. The lateral length may be formed to be small. This is to secure a space for the sensor through-hole 141b since the sensor through-hole 141b must be formed on one side where the third magnet through-hole is formed.

Of course, each of the first driving magnet 131 to the fourth driving magnet may be seated, disposed, or fixed in each of the first through hole for the fourth magnet to the through hole for the fourth magnet. At this time, similarly, the first driving magnet 131 and the second driving magnet 132 have the same size and shape as each other, and have substantially the same lateral length over the entire lateral length of the side surface of the housing 140 . have In addition, the third driving magnet and the fourth driving magnet have the same size and the same shape, and have smaller lateral lengths than the first driving magnet 131 and the second driving magnet 132 . can be formed.

Here, preferably, the third magnet through-hole and the fourth magnet through-hole may be symmetrically disposed on a straight line with respect to the center of the housing 140 . That is, the third driving magnet 130 and the fourth driving magnet 130 may be symmetrically disposed on a straight line with respect to the center of the housing 140 . If the third driving magnet 130 and the fourth driving magnet 130 are disposed to face each other while being biased to one side regardless of the center of the housing 140, the coil 120 of the bobbin 110 This is because there is a possibility that the bobbin 110 is tilted because the electromagnetic force acts to be biased on the one side. In other words, the third driving magnet 130 and the fourth driving magnet 130 are symmetrically disposed on a straight line with respect to the center of the housing 140 , so that the bobbin 110 and the coil 120 are symmetrical. ) can be applied to an electromagnetic force that is not biased, and can be guided to easily and accurately move the bobbin 110 in the first direction.

Also, as shown in FIGS. 3 to 6 and 8 , a plurality of first stoppers 143 may protrude from the upper surface of the housing 140 . The first stopper 143 is to prevent collision between the cover member 300 and the housing 140 body, and when an external shock occurs, the upper surface of the housing 140 is directly on the upper inner surface of the cover member 300 . collision can be avoided. In addition, the first stopper 143 may also serve to guide the installation position of the upper elastic member 150 . For this purpose, as shown in FIG. 9A , the first stopper of the upper elastic member 150 . A guide groove 155 having a corresponding shape may be formed at a position corresponding to the stopper 143 .

In addition, a plurality of upper frame support protrusions 144 to which the outer frame 152 of the upper elastic member 150 is coupled may protrude from the upper side of the housing 140 . On the other hand, as will be described later, the outer frame 152 of the upper elastic member 150 corresponding to the upper frame support protrusion 144 may have a first through hole 152a or a groove having a corresponding shape formed therein. It may be fixed with an adhesive or fusion bonding, and the fusion bonding may include thermal fusion or ultrasonic fusion.

In addition, as shown in FIG. 7 , a plurality of lower frame support protrusions 147 to which the outer frame 162 of the lower elastic member 160 is coupled may protrude from the lower side of the housing 140 . On the other hand, an insertion groove 162a or a hole having a corresponding shape may be formed in the outer frame 162 of the lower elastic member 160 corresponding to the lower frame support protrusion 147, where adhesive or fusion is applied. It may be fixed, and the fusion may include thermal fusion or ultrasonic fusion.

The driving magnet 130 may be fixed to the magnet through-hole 141a with an adhesive, but is not limited thereto, and an adhesive member such as a double-sided tape may be used. Alternatively, as a modified embodiment, a concave-shaped magnet seating portion may be formed on the inner surface of the housing 140 instead of the through-hole 141a for the magnet, and the magnet seating portion may correspond to the size and shape of the driving magnet 130 . It may have a corresponding size and shape.

The driving magnet 130 may be installed at a position corresponding to the coil 120 provided in the bobbin 110 . In addition, the driving magnet 130 may be configured as a single body, and in the present embodiment, the surface facing the coil 120 of the bobbin 110 may be an N pole, and an outer surface of the bobbin 110 may be an S pole. have. However, the present invention is not limited thereto, and the reverse configuration is also possible. In addition, the driving magnet 130 may be configured to be divided into two planes perpendicular to the optical axis.

The driving magnet 130 is configured in a rectangular parallelepiped shape having a certain width, and is seated in the through hole 141a or groove for the magnet so that the wide surface of the driving magnet 130 is part of the side surface of the housing 140 . can form. In this case, the driving magnets 130 facing each other may be installed parallel to each other. Also, the driving magnet 130 may be disposed to face the coil 120 of the bobbin 110 . In this case, the opposite surfaces of the driving magnet 130 and the coil 120 of the bobbin 110 may be flatly disposed to be parallel to each other. However, the present invention is not limited thereto, and either one of the driving magnet 130 and the coil 120 of the bobbin 110 may be flat, and the other may be configured as a curved surface, depending on the design. Alternatively, all of the facing surfaces of the coil 120 of the bobbin 110 and the driving magnet 130 may be curved surfaces, and in this case, the coil 120 of the bobbin 110 and the driving magnet 130 face each other. The curvature of the surface may be formed to be the same.

As described above, one side of the housing 140 is provided with a through-hole 141b or a groove for the sensor, and the position sensor 180 is inserted or disposed or seated in the through-hole 141b for the sensor, The position sensor 180 is electrically coupled to one surface of the printed circuit board 170 by soldering or soldering. In other words, the printed circuit board 170 may be fixed, supported, or disposed on the outer surface of one side provided with the sensor through hole 141b or groove among the four side surfaces 141 of the housing.

The position sensor 180 may be a displacement sensor that determines a first displacement value of the bobbin 110 in the first direction together with a sensing magnet 190 of the bobbin 110 to be described later. To this end, the position detection sensor 180 and the sensor through hole 141b or groove may be disposed at a position corresponding to the position of the sensing magnet 190 .

The position sensor 180 may be a sensor that detects a change in magnetic force emitted from the sensing magnet 190 of the bobbin 110 . Also, the position sensor 180 may be a Hall sensor. However, as an example, this embodiment is not limited to the Hall sensor, and any sensor capable of detecting a change in magnetic force can be used, and any sensor capable of detecting a position other than magnetic force is possible, for example For example, a method using a photoreflector or the like is also possible.

The printed circuit board 170 is coupled or disposed on one side of the housing 140, and may include a through hole 173 or a groove for mounting as described above. For this reason, the installation position of the printed circuit board 170 may be guided by the mounting protrusion 149 provided on one side of the housing 140 .

In addition, the printed circuit board 170 is provided with a plurality of terminals 171 , and may supply current to the coil 120 and the position detection sensor 180 of the bobbin 110 by receiving external power. The number of terminals 171 formed on the printed circuit board 170 may increase or decrease according to the types of components that need to be controlled. Meanwhile, according to the present embodiment, the printed circuit board 170 may be provided as an FPCB.

Among the above-described terminals 171 , a terminal 171 connected to a test pin may be included, and four or six terminals 171 may be disposed.

The printed circuit board 170 may include a control unit that readjusts the amount of current applied to the coil 120 based on the first displacement value sensed by the displacement sensing unit, that is, the control unit is the printed circuit board It is mounted on 170. In addition, in another embodiment, the control unit may be mounted on a separate substrate rather than on the printed circuit board 170, which may be a substrate on which the image sensor of the camera module is mounted, or may be a separate substrate. .

The actuator driving distance may be further calibrated based on the Hall voltage difference with respect to the change in the magnet flux (ie, magnetic flux density) detected by the Hall sensor.

The bobbin 110 may be configured to be reciprocally movable in the first axial direction with respect to the housing 140 fixed in the first axial direction. An auto-focusing function may be executed due to movement of the bobbin 110 in the first axial direction.

The bobbin 110 may be described in more detail below with reference to the drawings.

Meanwhile, the upper elastic member 150 and the lower elastic member 160 may elastically support the ascending and/or descending operation of the bobbin 110 in the optical axis direction. The upper elastic member 150 and the lower elastic member 160 may be provided as a leaf spring.

As shown in FIGS. 2 to 4 and 9A to 11C , the upper elastic member 150 and the lower elastic member 160 are coupled to the bobbin 110 and the inner frames 151 and 161 and the housing 140 . It may include outer frames 152 and 162 coupled to and connecting portions 153 and 163 connecting the inner frames 151 and 161 and the outer frames 152 and 162 .

The connecting portions 153 and 163 may be bent at least once to form a pattern having a predetermined shape. The bobbin 110 may be elastically (or elastically) supported by a rising and/or lowering operation in the first direction in the optical axis direction through a change in the position of the connection parts 153 and 163 and a minute deformation.

In the lens driving device according to the present embodiment, the printed circuit board 170 is made of the same material as at least one of the upper elastic member 150 and the lower elastic member 160, or as shown in FIGS. 4 and 8 in particular. As such, it may be formed integrally with the upper elastic member 150, and only the upper elastic member 150 or the lower elastic member 160 is shown in FIGS. 9A to 11C for convenience of understanding.

In this case, the printed circuit board may be a flexible printed circuit board (FPCB), and a conductive layer such as copper (Cu) may be included in an insulating layer made of polyimide or polyamide, and an upper elastic member ( 150) and at least one of the lower elastic member 160 may include the above-described polyimide or polyamide, and may include a conductive material in a pattern to be described later.

According to the present embodiment, as shown in FIG. 9A , the upper elastic member 150 has a plurality of first through-holes 152a in the outer frame 152 , and a plurality of second through-holes in the inner frame 151 . (151a) may be provided.

The first through-hole 152a is coupled to the upper frame support protrusion 144 provided on the upper surface of the housing 140, and the second through-hole 151a or groove is located on the upper surface of the bobbin 110 to be described later. It may be combined with the provided upper support protrusion. That is, the outer frame 152 is fixed and coupled to the housing 140 through the first through hole 152a, and the inner frame 151 is fixed to the bobbin 110 through the second through hole 151a or groove. and may be combined.

The connection part 153 may connect the inner frame 151 and the outer frame 152 such that the inner frame 151 is elastically deformable with respect to the outer frame 152 in a first direction in a predetermined range. . That is, the connection part 153 elastically connects the inner frame 151 fixed or coupled to the upper surface of the bobbin 110 and the outer frame 152 fixed or coupled to the upper surface of the housing 140 . The bobbin 110 and the housing 140, which are connected to each other and thus separated as separate parts, may be elastically connected by the upper elastic member 150 at the upper part.

At least one of the inner frame 151 and the outer frame 152 of the upper elastic member 150 has a terminal part electrically connected to at least one of the coil 120 and the printed circuit board 170 of the bobbin 110 . may be provided with at least one or more.

The connecting portion 153 may not have a constant width and may be irregular. In FIG. 9A , the connecting portion 153 may include a second region 153a having a wider width than other regions. In the connection part 153 , the remaining area excluding the second area 153a may be referred to as a first area, and the above-described second area 153a and the second area 163a to be described later may be referred to as a parasitic area. have.

In FIG. 9A , the width W ₁ of the first area of the connection part 153 may be 30 micrometers to 60 micrometers, and the width W ₂ of the second area 153a is the width W ₁ of the first area. ) may be 1.2 times or more, but may be less than 2 times.

A plurality of connection parts 153 may be provided. In FIG. 9A , four connection parts 153 connecting the inner frame 151 and the outer frame 152 are provided, and the shapes of the four connection parts 153 are the same. It may be symmetrical with respect to the center of the inner frame 151 or the outer frame 152 .

In the illustrated embodiments, each of the connecting portions 153 has a pattern bent three times. In FIG. 9A , one pattern forms the second region 153a and is wider than the other regions, and in FIG. 9B , two patterns are formed. The second region 153a is formed to have a wider width than other regions, and in FIG. 9C , three patterns form the second region 153a.

As shown in FIG. 10A , the lower elastic member 160 has a plurality of insertion grooves 162a or holes in the outer frame 162 , and a plurality of third through holes 161a in the inner frame 161 or A groove may be provided.

The insertion groove 162a or hole is coupled to a lower frame support protrusion 147 provided on the lower surface of the housing 140, and the third through hole 161a or groove is a lower surface of the bobbin 110 to be described later. It may be combined with the lower support protrusion 114 provided on the . That is, the outer frame 162 is fixed and coupled to the housing 140 through the insertion groove 162a or hole, and the inner frame 161 is attached to the bobbin 110 through the third through hole 161a or groove. It can be fixed and joined.

The connection part 163 may connect the inner frame 161 and the outer frame 162 so that the inner frame 161 is elastically deformable in a predetermined range with respect to the outer frame 162 in the first direction. . That is, the connection part 163 elastically connects the inner frame 161 fixed or coupled to the lower surface of the bobbin 110 and the outer frame 162 fixed or coupled to the lower surface of the housing 140 . The bobbin 110 and the housing 140, which are connected to each other and thus separated as separate parts, can be elastically connected by the lower elastic member 160 at the bottom.

The lower elastic member 160 may include a first lower elastic member 160a and a second lower elastic member 160b separated from each other as shown in FIG. 10A and the like. Through this two-part structure, the lower elastic member 160 may receive power of different polarities or different power to the first lower elastic member 160a and the second lower elastic member 160b. That is, after the inner frame 161 and the outer frame 162 are coupled to the bobbin 110 and the housing 140 , respectively, the inner frame corresponding to both ends of the coil 120 disposed on the bobbin 110 . By providing a solder part at a position of , power of different polarity or power of different polarity may be applied by performing conductive connection such as soldering in the solder part. In addition, the first lower elastic member is electrically connected to one of both ends of the coil, and the other one of the both ends of the coil and the second lower elastic member are electrically connected to each other to apply current and/or voltage from the outside. can receive

Meanwhile, the upper elastic member 150 and the lower elastic member 160 , the bobbin 110 and the housing 140 may be assembled through thermal fusion and/or bonding using an adhesive or the like. At this time, according to the assembly sequence, the fixing operation can be finished by bonding using an adhesive after fixing by heat fusion.

As a modified embodiment, the upper elastic member 150 may have a two-part structure, and the lower elastic member 160 may have an integrated structure.

At least one of the inner frame 161 and the outer frame 162 of the lower elastic member 160 has a terminal part electrically connected to at least one of the coil 120 and the printed circuit board 170 of the bobbin 110 . At least one may be provided.

The damping unit 410 may serve as an attenuator for absorbing vibrations in the optical axis direction generated when the lens driving device 100 drives a lens or an auto-focusing operation. The damping unit 410 does not move during the auto-focusing operation of the lens driving device 100 but between a fixed body fixed to its original position and/or a movable body moving in the optical axis direction during the auto-focusing operation of the lens driving device 100 . can be provided in The fixed body may be, for example, an outer frame of the cover member 300 , the housing 140 , or the base 210 , or the upper elastic member 150 and/or the lower elastic member 160 , and the movable body. may be a bobbin 110 , or a lens, or a coil, or an inner frame of the upper elastic member 150 and/or the lower elastic member 160 .

In FIG. 10A , the width d ₁ of the first area of the connection part 163 may be 30 micrometers to 60 micrometers, and the width d ₂ of the second area 163a is the width d ₁ of the first area. ) may be 1.2 times or more, but may be less than 2 times.

A plurality of connection parts 163 may be provided. In FIG. 10A , four connection parts 163 connecting the inner frame 161 and the outer frame 162 are provided, and the shapes of the four connection parts 163 are the same. It may be symmetrical with respect to the center of the inner frame 161 or the outer frame 162 .

In the illustrated embodiments, the connection part 163 has a pattern bent twice, respectively. In FIG. 10A , one pattern forms the second region 163a and is wider than the other regions, and in FIG. 10B , two patterns are formed. This second region 163a is formed.

11A to 11C are diagrams schematically illustrating an arrangement of a damper according to example embodiments.

11A and 11B, a damper 158 is disposed to connect the housing and the connection part 153, and the damper 158 is made of a silicon material and is disposed in contact with one pattern constituting the connection part 153, or FIG. 11c It may be disposed in contact with all three patterns constituting the connection part 153 as shown in FIG.

In addition, in FIGS. 11A to 11C , the dampers 158 are all disposed on the respective connection portions 153 , and may be disposed symmetrically with respect to the center of the inner frame 151 or the outer frame 152 .

12 is a schematic perspective view of a bobbin according to an embodiment of the present embodiment, FIG. 13 is a schematic bottom perspective view of a bobbin according to an embodiment of the present embodiment, and FIG. 14 is a bobbin according to an embodiment of the present embodiment It is a schematic exploded perspective view, Fig. 15 is a partially enlarged perspective view of Fig. 14, Fig. 16 is a partially enlarged bottom view of Fig. 14, and Fig. 17 is a schematic partially enlarged perspective view of a receiving groove according to an embodiment of the present embodiment, 18 is a schematic longitudinal cross-sectional view of a bobbin according to an embodiment of the present embodiment.

12 to 18 , the bobbin 110 may be installed in the inner space of the housing 140 to be reciprocally movable in the optical axis direction. A coil 120 to be described later is installed on the outer circumferential surface of the bobbin 110 so that electromagnetic interaction with the driving magnet 130 of the housing 140 is possible. It is possible to reciprocate the bobbin 110 in the first direction due to the miracle interaction. In addition, the bobbin 110 is elastically (or elastically) supported by the upper elastic member 150 and the lower elastic member 160, and moves in the first direction, which is the optical axis direction, to perform an auto-focusing function. .

Although not shown, the bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed, but the lens barrel is a component of a camera module to be described later and is an essential component of the lens driving device. It may not be an element. The lens barrel may be coupled to the inside of the bobbin 110 in various ways. For example, a female thread may be formed on the inner circumferential surface of the bobbin 110 , and a male thread corresponding to the screw thread may be formed on an outer circumferential surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screw coupling thereof. However, the present invention is not limited thereto, and the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screw coupling without forming a screw thread on the inner circumferential surface of the bobbin 110 . Alternatively, the one or more lenses may be integrally formed with the bobbin 110 without a lens barrel. The lens coupled to the lens barrel may be configured as one sheet, or two or more lenses may be configured to form an optical system.

In addition, a plurality of upper support protrusions 113 and a plurality of lower support protrusions 114 may protrude from the upper and lower surfaces of the bobbin 110 .

As shown in FIG. 12 , the upper support protrusion may be provided in a cylindrical or prismatic shape, and may couple and fix the inner frame 151 and the bobbin 110 of the upper elastic member 150 . According to the present embodiment, a second through hole 151a or a groove may be formed in a position corresponding to the upper support protrusion of the inner frame 151 of the upper elastic member 150 . At this time, the upper support protrusion and the second through hole 151a or the groove may be fixed by thermal fusion, or may be fixed with an adhesive member such as epoxy. In addition, a plurality of upper support protrusions may be provided. In this case, the distance between the respective upper support protrusions may be appropriately arranged within a range that can avoid interference with surrounding components. That is, each of the upper support protrusions may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110 , and their intervals are not constant, but are symmetrical with respect to a specific virtual line passing through the center of the bobbin 110 . may be formed.

As shown in FIG. 13 , the lower support protrusion 114 may be provided in a cylindrical or prismatic shape like the upper support protrusion, and the inner frame 161 of the lower elastic member 160 and the bobbin 110 are provided. Can be combined and fixed. According to the present embodiment, a third through hole 161a or a groove may be formed at a position corresponding to the lower support protrusion 114 of the inner frame 161 of the lower elastic member 160 . At this time, the lower support protrusion 114 and the third through hole 161a or the groove may be fixed by thermal fusion, or may be fixed with an adhesive member such as epoxy. In addition, a plurality of lower support protrusions 114 as shown in FIG. 13 may be provided. In this case, the distance between each of the lower support protrusions 114 may be appropriately arranged within a range that can avoid interference with surrounding components. That is, each of the lower support protrusions 114 may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110 .

In addition, on the upper and lower surfaces of the bobbin 110 , upper escape grooves 112 and A lower escape groove 118 is formed.

Since the upper escape groove 112 and the lower escape groove 118 are provided, when the bobbin 110 moves in the first direction with respect to the housing 140 , the space between the connection parts 153 and 163 and the bobbin 110 is By removing the interference, elastic deformation of the connecting portions 153 and 163 may be more easily performed. In addition, the position of the upper escape groove may be arranged at the corner of the housing as in the embodiment, but may be arranged on the side according to the shape and/or position of the connection part of the elastic member.

In addition, a seating groove 116 for a coil in which the coil 120 is installed may be provided on the outer circumferential surface of the bobbin 110 , but only a seating portion may be provided.

The coil 120 may be provided as a ring-shaped coil block inserted and coupled to the outer circumferential surface of the bobbin 110 or the coil seating groove 116 or the seating portion, but is not limited thereto. It may be directly wound on the outer circumferential surface of the bobbin 110 or the seating groove 116 for the coil or the seating part.

According to this embodiment, the coil 120 may be formed in an approximately octagonal shape as shown in FIG. 14 . This corresponds to the shape of the outer peripheral surface of the bobbin 110, and the bobbin 110 may also be provided in an octagonal shape. In addition, at least four surfaces of the coil 120 may be provided in a straight line, and a corner portion connecting these surfaces may be formed in a round or straight line. In this case, the portion formed in a straight line may be formed to be a surface corresponding to the driving magnet 130 . Also, the surface of the driving magnet 130 corresponding to the coil 120 may have the same curvature as the curvature of the coil 120 . That is, if the coil 120 is a straight line, the surface of the corresponding driving magnet 130 may be a straight line, and if the coil 120 is curved, the corresponding driving magnet 130 may have a curved surface. and may also have the same curvature. In addition, even if the coil 120 is curved, the corresponding driving magnet 130 may have a straight surface or vice versa.

The coil 120 is for performing an autofocus function by moving the bobbin 110 in the optical axis direction. When a current is supplied, an electromagnetic force can be formed through electromagnetic interaction with the driving magnet 130 , and formed Electromagnetic force may move the bobbin 110 .

On the other hand, the coil 120 may be configured to correspond to the driving magnet 130 . As shown, the driving magnet 130 is configured as a single body so that the entire surface facing the coil 120 has the same polarity. When provided to have a , the coil 120 may also be configured such that a surface corresponding to the driving magnet 130 has the same polarity. On the other hand, although not shown, if the driving magnet 130 is divided into two planes perpendicular to the optical axis and the plane facing the coil 120 is divided into two or more, the coil 120 is also divided It is also possible to be divided into a number corresponding to the driving magnet 130 .

In addition, the bobbin 110 may include a sensing magnet 190 included in the displacement sensing unit together with the position sensing sensor 180 of the housing 140 described above. The sensing magnet 190 may be fixed, disposed, or coupled to the bobbin 110 . For this reason, the sensing magnet 190 may move in the first direction by the same amount of displacement as the bobbin 110 when the bobbin 110 moves in the first direction. In addition, the sensing magnet 190 may be configured as a single body, and the upper direction of the bobbin 110 may be an N pole and a lower direction of the bobbin 110 may be an S pole. However, the present invention is not limited thereto, and the reverse configuration is also possible. Also, the sensing magnet 190 may be divided into two planes perpendicular to the optical axis.

Here, as shown in FIGS. 14 to 18 , the bobbin 110 may include a receiving groove 117 for accommodating the sensing magnet 190 on an outer circumferential surface of the bobbin 110 .

The accommodating groove 117 may be formed in an inner direction of the bobbin 110 to a predetermined depth from the outer surface of the bobbin 110 .

Specifically, the receiving groove 117 may be formed on one side of the bobbin 110 so that at least a portion of the receiving groove 117 is located inside the coil 120 . In addition, at least a portion of the receiving groove 117 may be concave to a predetermined depth in the inner direction of the bobbin 110 more than the coil seating groove 116 . In this way, by forming the accommodating groove 117 in the inner direction of the bobbin 110, the sensing magnet 190 can be accommodated in the bobbin 110, whereby a separate sensor for the sensing magnet 190 is formed. Since there is no need to secure an installation space, the space efficiency of the bobbin 110 can be improved.

In particular, the receiving groove 117 may be disposed at a position corresponding to the position of the position detection sensor 180 of the housing 140 (or a position opposite to the position detection sensor 180 ). For this reason, the distance between the sensing magnet 190 and the position detection sensor 180 is the thickness of the coil 120 and the separation distance between the coil 120 and the position detection sensor 180 or the coil and the position detection sensor Since the distance can be minimized by further including the distance between them, the magnetic force detection accuracy of the position sensor 180 can be improved.

The receiving groove 117 may have an opening 119 communicating with the receiving groove 117 on one of a lower surface and an upper surface of the bobbin 110 . For example, as shown in FIG. 18 , in the receiving groove 117 , a part of the lower surface of the bobbin 110 is opened to form an opening 119 , and the opening 119 is the receiving groove 117 . can form an entrance to The sensing magnet 190 may be inserted, disposed, or fixed through the opening 119, and may be separated therethrough.

More specifically, as shown in FIGS. 16 to 18 , the receiving groove 117 has an inner surface on which one surface of the sensing magnet 190 is supported, and a predetermined smaller than the inner surface so that an adhesive can be injected. It may include an adhesive groove 117b concave further inwardly.

The inner surface is a surface positioned inward toward the center of the bobbin 110, and when the sensing magnet 190 has a rectangular parallelepiped shape, the wide surface of the sensing magnet 190 is in contact or is seated. to be.

The bonding groove 117b may be a groove formed so that a portion of the inner surface is deeply concave inward toward the center of the bobbin 110 . The bonding groove 117b may be formed from the opening 119 to the inner surface of the bobbin 110 on which one surface of the sensing magnet 190 is contacted, seated, or disposed.

18, the bonding groove 117b further includes a first additional groove 117c formed longer than the length of the sensing magnet 190 in the vertical thickness direction of the bobbin 110. can That is, the first additional groove 117c is an extension of the bonding groove 117b formed to be deeper than the inner surface of the bobbin 110 on which the back surface of the sensing magnet 190 is in contact with, seated or disposed. to be. By having the first additional groove 117c, when the adhesive is injected into the bonding groove 117b through the opening 119, the adhesive is filled from the first additional groove 117c to seal the inside of the bonding groove 117b. Since it is filled, it is possible to prevent the adhesive from overflowing from the adhesive groove 117b and flowing to the coil 120 along the gap between the sensing magnet 190 and the receiving groove 117, so the sensing magnet 190 ) can reduce the failure rate of the lens driving device 100 during the coupling process.

The bonding groove 117b may further include a second additional groove 117a formed to a predetermined depth inward from the opening 119 toward the center of the bobbin 110 . That is, the second additional groove 117a may be formed deeper in the inner direction toward the center of the bobbin 110 than the inner surface in the vicinity of the opening 119 . The second additional groove 117a communicates with the bonding groove 117b. In other words, the second additional groove 117a is an extension of the bonding groove 117b. In this way, by providing the second additional groove 117a, the adhesive can be injected into the adhesive groove 117b through the second additional groove 117a, so that the adhesive overflows near the opening 119 and the coil ( 120), etc., can be prevented from being adhered to other components of the bobbin 110, thereby reducing the occurrence rate of defects in the lens driving device 100 during the coupling process of the sensing magnet 190.

As a modified embodiment, the second additional groove 117a may be provided on the bobbin 110 alone without the adhesive groove 117b. In this case, an adhesive may be injected into the second additional groove 117a to couple and fix the bobbin 110 and the sensing magnet 190 .

In addition, the bonding groove 117b may include at least one of the first additional groove 117c and the second additional groove 117a. That is, the bonding groove 117b may include only the first additional groove 117c or only the second additional groove 117a.

As a modified embodiment, in the receiving groove, the depth between the inner surface on which one surface (ie, wide surface) of the sensing magnet is supported and the outer peripheral surface (ie, the surface of the coil seating groove surface) on which the coil is provided is the sensing It may be less than or equal to the thickness of the magnet. For this reason, the sensing magnet may be fixed in the receiving groove by the inner pressing force of the coil due to the winding of the coil. In this case, there is no need to use an adhesive.

As a further embodiment, although not shown in the drawings, the bobbin 110 is symmetrical with the receiving groove 117 with respect to the center of the bobbin 110 on the outer peripheral surface facing the outer peripheral surface where the receiving groove 117 is formed. It may further include an additional accommodating groove 117 formed on the outer peripheral surface of the bobbin 110 and a weight balancing member accommodated in the additional accommodating groove 117 at the fixed position.

That is, the additional receiving groove 117 is a bobbin of a predetermined depth at a position symmetrical with the receiving groove 117 in a straight line with respect to the center of the bobbin 110 on the outer peripheral surface facing the outer peripheral surface where the receiving groove 117 is formed. It may be formed in the inner direction of (110). And, the weight balancing member is fixed and coupled in the additional receiving groove 117, and has the same weight as the magnetic force sensing member.

In this way, by providing the additional accommodating groove 117 and the weight balancing member, the horizontal weight imbalance of the bobbin 110 caused by the accommodating groove 117 and the sensing magnet 190 is reduced by the mounting of the weight balancing member. can be compensated

In addition, the additional receiving groove 117 may include at least one of the adhesive groove 117b, the first additional groove 117c, and the second additional groove 117a.

19 is a view showing the relationship between gain and phase in the lens driving device according to the embodiment. As shown in the graph shown by B', the peak value may be lowered and the frequency may be changed, and when the damper and the parasitic region in the connection part in the upper elastic member or the lower elastic member are provided, 'A' and 'C' Since the peak value can be lowered and the frequency can be changed in the region, noise can be suppressed and the oscillation phenomenon can be prevented when the vibration motor is driven.

20A to 20C show the oscillation phenomenon that occurs when the gain is gradually increased in the lens driving device, and in FIG. 21, as in the above-described embodiment, the upper elastic member or the lower elastic member is made of the same material as the FPCB, or the damper and the upper side are made of the same material. It shows that the parasitic region is provided in the connection part in the elastic member or the lower elastic member, so that the frequency characteristic is changed to prevent the oscillation phenomenon.

In addition, it may include a lens driving device configured as described above, a lens barrel coupled to the bobbin, an image sensor, and a printed circuit board. In this case, the printed circuit board may have an image sensor mounted thereon and form a bottom surface of the camera module.

The bobbin may include a lens barrel in which at least one lens is installed, and the lens barrel may be formed to be screw-coupled to the inside of the bobbin. However, the present invention is not limited thereto, and although not shown, the lens barrel may be directly fixed to the inside of the bobbin by methods other than screwing, or the one or more lenses may be integrally formed with the bobbin without the lens barrel.

The lens may be configured as one sheet, or two or more lenses may be configured to form an optical system. In the base, an infrared cut filter may be additionally installed at a position corresponding to the image sensor, and may be coupled to the housing.

In addition, the lower side of the housing may be supported. A separate terminal member may be installed on the base to conduct electricity with the printed circuit board, and it is also possible to integrally form the terminal using a surface electrode or the like.

Meanwhile, the base may function as a sensor holder to protect the image sensor, and in this case, a protrusion may be formed in a downward direction along a side surface of the base. However, this is not an essential configuration, and although not shown, a separate sensor holder may be disposed under the base to perform its role.

In the above, it has been illustrated and described as a specific embodiment to illustrate the technical idea of this embodiment, but this embodiment is not limited to the same configuration and operation as the specific embodiment as described above, and various modifications do not depart from the scope of the present embodiment. can be carried out within Accordingly, such modifications should be regarded as belonging to the scope of the present embodiment, and the scope of the present embodiment may be determined by the claims to be described later.

100: lens driving device 110: bobbin
120: coil 130: magnet for driving
140: housing 150: upper elastic member
153, 163: connecting portion 160: lower elastic member
170: printed circuit board 180: position detection sensor
190: sensing magnet 210: base
300: cover member 410: damping part

Claims (16)

housing;
a bobbin disposed within the housing;
a coil disposed on the bobbin;
a first magnet disposed to overlap the bobbin in a first direction perpendicular to the optical axis;
a second magnet disposed on the bobbin;
a position detection sensor for detecting the position of the second magnet;
an elastic member including an outer frame coupled to the housing, an inner frame coupled to the bobbin, and a connecting portion connecting the outer frame and the inner frame; and
and a damper at least partially disposed in the connection part;
The connecting portion includes a first end coupled to the outer frame and a second end coupled to the inner frame,
The inner frame includes a hole disposed adjacent to the second end of the connecting portion,
the damper is disposed closer to the first end of the connecting portion than the hole of the inner frame,
The bobbin includes a groove in which at least a portion of the second magnet is disposed. According to claim 1,
The outer frame of the elastic member includes a hole disposed adjacent to the first end of the connecting portion,
The damper is disposed closer to the hole of the outer frame than the hole of the inner frame. 3. The method of claim 2,
The damper is a lens driving device in contact with the connection portion and the housing. According to claim 1,
The elastic member includes an upper elastic member disposed on an upper side of the bobbin and an upper side of the housing, and a lower elastic member disposed on a lower side of the bobbin and a lower side of the housing,
The lower elastic member includes a first lower elastic member and a second lower elastic member. According to claim 1,
The housing includes a second side surface overlapping the first side surface in the first direction, and a third side surface disposed in a second direction perpendicular to the first side surface,
The first magnet includes a first magnet unit disposed on the first side surface of the housing and a second magnet unit disposed on the second side surface of the housing,
The first magnet is not disposed on the third side surface of the housing. According to claim 1,
The damper is a lens driving device spaced apart from the inner frame. 6. The method of claim 5,
The third side surface of the housing includes an opening overlapping the second magnet in the second direction. According to claim 1,
The damper is disposed closer to the first end of the connecting portion than the second end of the connecting portion. 8. The method of claim 7,
The position detection sensor is at least partially disposed in the opening of the third side of the housing. According to claim 1,
The connecting portion includes a first portion and a second portion having a width greater than a width of the first portion. According to claim 1,
A lens driving device in which a portion of the coil is disposed between the second magnet and the position detection sensor. The method of claim 1,
A circuit board electrically connected to the elastic member,
The position detection sensor is disposed on the circuit board,
wherein the coil is electrically connected to the elastic member. housing;
a bobbin disposed within the housing;
a coil disposed on the bobbin;
a first magnet disposed to overlap the bobbin in a first direction perpendicular to the optical axis;
a second magnet disposed on the bobbin;
a position detection sensor for detecting the position of the second magnet;
an elastic member coupled to the bobbin and the housing, the elastic member including a first frame coupled to the housing, a second frame coupled to the bobbin, and a connecting portion connecting the first frame and the second frame; and
a damper disposed on at least a part of the connection part;
The connecting portion includes a first end connected to the first frame and a second end connected to the second frame,
The housing includes a first protrusion coupled to the first hole of the first frame disposed adjacent to the first end of the connection portion,
The bobbin includes a second protrusion coupled to the second hole of the second frame disposed adjacent to the second end of the connection portion,
the damper is disposed closer to the first protrusion of the housing than the second protrusion of the bobbin;
The bobbin includes a groove in which at least a portion of the second magnet is disposed. 14. The method of claim 13,
The damper is disposed closer to the first end of the connecting portion than the second end of the connecting portion, and is spaced apart from the second frame. 14. The method of claim 13,
The first magnet is not disposed on one side of the housing disposed in a second direction perpendicular to the first direction. housing;
a bobbin disposed within the housing;
a coil disposed on the bobbin
a first magnet disposed to overlap the bobbin in a first direction perpendicular to the optical axis;
a second magnet disposed on the bobbin;
a position detection sensor overlapping the second magnet in a second direction perpendicular to the optical axis and the first direction;
an elastic member including a first frame coupled to the housing, a second frame coupled to the bobbin, and a connection portion disposed between the first frame and the second frame; and
and a damper in contact with at least a part of the connection part of the elastic member,
the damper is disposed closer to the first frame than to the second frame,
wherein the damper does not come into contact with the second frame.

Images