KR20240068595A - Lens moving apparatus - Google Patents

Abstract

The embodiment includes a housing, a bobbin disposed in the housing, a first magnet disposed in the housing, a coil disposed in the bobbin and which moves the bobbin in the optical axis direction by interacting with the first magnet, an outer frame coupled to the housing, and a bobbin. An upper elastic member including a coupled inner frame and a connecting portion including a first end connected to the outer frame and a second end connected to the inner frame, and a damper disposed on the connecting portion, wherein the connecting portion includes a first bent portion, a second bend and a third bend, wherein, of the first to third bends, the first bend is located closest to the first end, the third bend is located closest to the second end, and the second bend is located closest to the first end. It is located between the first bent portion and the third bent portion, and the damper is located closest to the first bent portion among the first to third bent portions.

Description

Lens moving device {LENS MOVING APPARATUS}

This embodiment relates to a lens driving device.

Recently, the development of IT products such as mobile phones, smartphones, tablet PCs, and laptops with built-in ultra-small digital cameras is actively underway.

In the case of IT products with conventional ultra-small digital cameras, there is a built-in lens driving device that adjusts the distance between the image sensor that converts external light into a digital image or a digital image and the lens to align the focal length of the lens.

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. there is.

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

However, conventional lens driving devices have the following problems.

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

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

A lens driving device according to an embodiment includes a housing; a bobbin disposed within the housing; a first magnet disposed in the housing; a coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the first magnet; An upper elastic member including an outer frame coupled to the housing, an inner frame coupled to the bobbin, and a connection portion including a first end connected to the outer frame and a second end connected to the inner frame; and a damper disposed at the connection portion, wherein the connection portion includes a first bent portion, a second bent portion, and a third bent portion, and among the first to third bent portions, the first bent portion is the first bent portion. located closest to the end, the third bent portion is located closest to the second end, the second bent portion is located between the first bent portion and the third bent portion, and the damper is located between the first to third bent portions. Among them, it is located closest to the first bent portion.

The damper may be in contact with a portion of the housing. The lens driving device includes a second magnet disposed on the bobbin; And it may include a position sensor for detecting displacement of the bobbin. The damper may be disposed closer to the first end of the connection portion than to the second end of the connection portion.

The first magnet includes a first magnet unit disposed on a first side of the housing and a second magnet unit disposed on a second side of the housing, and the second magnet is disposed on the first side and the second side. It may be disposed on the outer surface of the bobbin opposite to the third side of the housing located in between. The position sensor may be a Hall sensor that detects a change in magnetic force emitted from the second magnet. The coil may be electrically connected to the upper elastic member. The bobbin may include a groove in which at least a portion of the second magnet is disposed.

The connection unit may include a first connection unit connecting a first area of the outer frame and a second area of the inner frame; and a second connection part connecting a third area of the outer frame and a fourth area of the inner frame, wherein the damper includes a first damper connected to the first connection part and a second damper connected to the second connection part. may include. The damper may be spaced apart from the inner frame. The damper may be spaced apart from the first end and the second end of the connection part. The damper may be made of silicone material. The damper may be disposed closer to the outer frame than to the inner frame.

A lens driving device according to another embodiment includes a housing; a bobbin disposed within the housing; a first magnet disposed in the housing; a coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the first magnet; an upper elastic member including an outer frame coupled to the housing, an inner frame coupled to the bobbin, and a connection portion connecting the outer frame and the inner frame; and a damper connecting the connection portion and the housing, wherein the connection portion includes a first end connected to a first area of the outer frame, a second end connected to a second area of the inner frame, and the first end and a first connection portion including a first bent portion, a second bent portion, and a third bent portion located between the second end; and a third end connected to the third region of the outer frame, a fourth end connected to the fourth region of the inner frame, and a fourth bent portion located between the third end and the fourth end, a fifth It includes a second connection portion including a bent portion and a sixth bent portion, and the damper includes a first damper in contact with the first connection portion and a second damper in contact with the second connection portion, and the first to first Among the three bends, the first bend is located closest to the first end, the third bend is located closest to the second end, and the second bend is located between the first bend and the third bend. is located, and the first damper is located closest to the first bent part among the first to third bent parts.

Among the fourth to sixth bends, the fourth bend is located closest to the third end, the sixth bend is located closest to the fourth end, and the fifth bend is located closest to the fourth bend and the fourth end. Located between six bent parts, the second damper may be located closest to the fourth bent part among the fourth to sixth bent parts.

The first damper may be spaced apart from the first end and the second end, and the second damper may be spaced apart from the third end and the fourth end. The first damper may be disposed closer to the first end than the second end, and the second damper may be disposed closer to the third end than the fourth end.

In the lens driving device according to the embodiment, the upper elastic member or the lower elastic member is manufactured from the same material as the FPCB or integrally formed, or a damper and a parasitic area within the connection part of the upper elastic member or lower elastic member are provided, so that when driving a vibration motor, etc. Noise can be 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 invention;
Figure 2 is a schematic exploded perspective view of a lens driving device according to an embodiment of the present embodiment;
Figure 3 is a schematic perspective view of the lens driving device in Figure 1 with the cover member removed;
Figure 4 is a schematic plan view of Figure 3,
5 is a schematic perspective view of a housing according to one embodiment of the present embodiment;
Figure 6 is a schematic perspective view of the housing viewed from a different angle than Figure 5;
7 is a schematic bottom perspective view of a housing according to one embodiment of the present embodiment;
8 is a schematic exploded perspective view of a housing according to one embodiment of the present embodiment;
9A to 9C are schematic plan views of the upper elastic member according to one embodiment of the present embodiment;
10A and 10B are schematic plan views of the lower elastic member according to one embodiment of the present embodiment;
11A to 11C are diagrams schematically showing the arrangement of dampers according to one embodiment 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 one embodiment of the present embodiment;
Figure 14 is a schematic exploded perspective view of a bobbin according to one embodiment of the present embodiment;
Figure 15 is a partially enlarged perspective view of Figure 14;
Figure 16 is a partially enlarged bottom view of Figure 14;
Figure 17 is a schematic partial enlarged perspective view of the receiving groove according to one embodiment of the present embodiment;
18 is a schematic longitudinal cross-sectional view of a bobbin according to one embodiment of the present embodiment;
Figure 19 is a diagram showing the relationship between gain and phase in a lens driving device according to an embodiment;
Figures 20A to 20C are diagrams showing the oscillation phenomenon that occurs when the gain is gradually increased in the lens driving device;
Figure 21 is a diagram showing that oscillation phenomenon is prevented by changing the frequency characteristics in the lens driving device according to the embodiment.

Hereinafter, preferred embodiments of this embodiment will be described with reference to the accompanying drawings so that those skilled in the art can easily implement them. It may be noted that the drawing numbers indicated on the components in the attached drawings are the same as possible when indicating the same composition in other drawings. Additionally, when describing the present embodiment, if it is determined that a detailed description of a related known function or known configuration may unnecessarily obscure the gist of the present embodiment, the detailed description may be omitted.

Additionally, some features presented in the drawings are enlarged, reduced, or simplified for ease of explanation, and the drawings and their components are not necessarily drawn to appropriate scale. However, those skilled in the art will easily understand these details.

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

And, hereinafter, the inner or inner direction or inner portion refers to the direction or portion toward the center of the lens driving device relative to the plan view of the lens driving device, and the outer or outer direction or outer portion refers to the plan view of the lens driving device. It may refer to a direction or part that is relatively distant from the center of the lens driving device.

Figure 1 is a schematic perspective view of a lens driving device according to an embodiment of this embodiment, Figure 2 is a schematic exploded perspective view of a lens driving device according to an embodiment of this embodiment, and Figure 3 is a cover member in Figure 1. It is 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 one embodiment of the present embodiment, and FIG. 6 is a housing viewed from a different angle than that of FIG. 5. is a schematic perspective view, Figure 7 is a schematic bottom perspective view of the housing according to an embodiment of the present embodiment, Figure 8 is a schematic exploded perspective view of the housing according to an embodiment of the present embodiment, and Figures 9A to 9C are Figures 10a and 10b are schematic plan views of the upper elastic member according to one embodiment of the present embodiment, and Figures 11a to 11c are a schematic plan view of the lower elastic member according to one embodiment of the present embodiment. This is a diagram schematically showing the arrangement of a damper according to example embodiments.

The lens driving device according to this 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 located at the focal length of the lens. That is, the lens driving device is a device that performs an auto focusing function.

As shown in FIGS. 1 to 4, the lens driving device 1000 according to this embodiment includes a cover member 300, an upper elastic member 150, a bobbin 110, and a 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 detection unit that determines the amount of displacement in the optical axis direction (i.e., the first direction), and a damping unit 410 that functions as an attenuator.

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

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

The cover member 300 may have an opening on its upper surface that allows the lens coupled to the bobbin 110 to be exposed to external light. Additionally, the opening may be provided with a window made of a light-transmissive material, thereby preventing foreign substances such as dust or moisture from penetrating into the interior of the camera module.

The cover member 300 may include a first groove 310 at the bottom. At this time, as will be described later, when the cover member 300 and the base are combined, the base 210 is formed at a portion that comes into contact with the first groove 310 (i.e., a position corresponding to the first groove 310). 2 A groove portion 211 may be provided. When the cover member 300 and the base are combined, a groove of a certain area may be formed through the combination of the first groove 310 and the second groove 211. An adhesive member having viscosity may be applied to this groove. That is, the adhesive member applied to the groove fills the gap between the opposing surfaces of the cover member 300 and the base 210 through the groove, so that the cover member 300 is connected to the base 210. When combined with, the space between the cover member 300 and the base 210 can be sealed, and also, when the cover member and the base are combined, the side surface can be sealed.

Additionally, a third groove 320 may be formed on a surface of the cover member 300 corresponding to the terminal surface of the printed circuit board 170 to prevent interference with a plurality of terminals formed on the terminal surface. The third groove 320 may be formed concavely on the entire surface facing the terminal surface, and the adhesive member is applied inside the third groove to form the cover member 300, the base 210, and the printed circuit board ( 170) can be sealed, and the sides can be sealed when the cover member and the base are combined.

Meanwhile, the first groove 310 to the third groove 320 are formed on the base 210 and the cover member 300, respectively, but this is not limited, and may be formed in a similar shape only on the base 210. , may be configured to be formed only on the cover member 300.

The base 210 may be provided in an overall square shape, and may be combined with the cover member 300 to form an accommodating space for the bobbin 110 and the housing 140.

A stepped portion protruding outward by 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 of the cover member 300 is the upper portion of the stepped portion. Or it may be seated or in contact with or placed or coupled to the side. Due to this, it is possible to guide the cover member 300 coupled to the upper side of the step portion, and also, the end of the cover member 300 can be coupled to surface contact, and the end of the cover member is connected to the bottom or side. It can be included. At this time, the stepped portion and the end of the cover member 300 may be adhesively fixed and sealed using an adhesive or the like.

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

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

Additionally, the base 210 may include four guide members 216 that protrude at right angles at a predetermined height upward from the four corners. The guide member may have a polygonal pillar shape. The guide member 216 may be inserted, fastened, or coupled to the lower guide groove 148 of the housing 140, which will be described later. In this way, when the housing 140 is seated or placed on the upper part of the base 210 due to the guide member 216 and the lower guide groove 148, 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 deviated from the reference position where it should be mounted due to vibration during the operation of the lens driving device 100 or an operator's mistake during the assembly process.

As shown in FIGS. 4 to 8 , the housing 140 may have an overall hollow pillar shape (for example, a hollow square pillar 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 the bobbin 110 inside is movable in a first direction with respect to the housing 140. The bobbin 110 can be accommodated.

In FIG. 2 , the upper elastic member 150 and the printed circuit board 170 are shown separately for ease of understanding. However, as shown in FIGS. 4 and 8, the upper elastic member 150 is separated from the printed circuit board 150. ) can be formed integrally with.

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

As shown in FIG. 8, each of the two opposing sides of the four sides 141 of the housing 140 is provided with a through hole 141a or groove for the magnet where the driving magnet 130 is seated, placed, or fixed. It 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 installed in each of the magnet through-holes 141a.

In addition, among the four sides 141 of the housing 140, one side perpendicular to the two sides or a side other than the two sides has a through hole for a sensor into which a position sensor 180, to be described later, is inserted, placed, fixed, or seated. (141b) may be provided, and in an embodiment described later, when the printed circuit board 170 is disposed to extend to the inner surface of the housing, the position sensor 180 may be disposed on the extended portion. The sensor through-hole 141b preferably has a size and shape corresponding to the position sensor 180, which will be described later. Additionally, on one side, at least one mounting protrusion 149 may be provided to enable the printed circuit board 170 to be mounted, placed, temporarily fixed, or fixed. The mounting protrusion 149 is inserted into the mounting through-hole 173 formed on the printed circuit board 170, which will be described later, and at this time, the mounting through-hole 173 and the mounting protrusion 149 are shape-fit. It can be said that it is desirable to be combined in a way or an interference fit method, but it can also serve only a simple guide function.

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

As an additional embodiment of the housing 140, each of the two opposing sides of the four sides 141 of the housing 140 has through holes for first and second magnets in which the driving magnet 130 is seated, placed, or fixed. (141a, 141a') may be provided. In addition, among the four sides 141 of the housing 140, one side perpendicular to the two sides or a side other than the two sides has a third magnet through hole and a sensor spaced apart from the third magnet through hole by a predetermined distance. A through hole 141b may be provided. In addition, among the four sides 141 of the housing 140, the other side facing the one side may be provided with a through hole for a fourth magnet.

That is, the four sides 141 of the housing 140 may be provided with four through-holes for magnets and one through-hole 141b for a sensor.

At this time, the first magnet through-hole 141a and the second magnet through-hole 141a' have the same size and shape, and are (almost) the same throughout the lateral length of the side of the housing 140. It 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 shape, and are larger than the through hole for the first magnet (141a) and the through hole for the second magnet (141a'). The lateral length may be formed to be small. This is to secure 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 magnets 131 to the fourth driving magnets may be seated, placed, or fixed in each of the through holes for the first magnet to the fourth magnet through hole. At this time, similarly, the first driving magnet 131 and the second driving magnet 132 have the same size and shape, and have almost the same lateral length over the entire lateral length of the side of the housing 140. has In addition, the third driving magnet and the fourth driving magnet have the same size and shape, and have a smaller lateral length 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 arranged in 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 arranged in 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 opposite to 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 the electromagnetic force acts biased toward one side, so there is a possibility that the bobbin 110 may be tilted. In other words, the third driving magnet 130 and the fourth driving magnet 130 are arranged symmetrically in a straight line with respect to the center of the housing 140, so that the bobbin 110 and the coil 120 ), an unbiased electromagnetic force can be applied to guide the bobbin 110 to move in the first direction easily and accurately.

Additionally, as shown in FIGS. 3 to 6 and 8, a plurality of first stoppers 143 may be formed to protrude from the upper surface of the housing 140. The first stopper 143 is to prevent collision between the cover member 300 and the body of the housing 140, and when an external impact occurs, the upper surface of the housing 140 is directly pressed against the upper inner surface of the cover member 300. Collisions can be prevented. 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, etc., the first stopper 143 of the upper elastic member 150 A guide groove 155 of a corresponding shape may be formed at a position corresponding to the stopper 143.

Additionally, a plurality of upper frame support protrusions 144 to which the outer frame 152 of the upper elastic member 150 is coupled may be protrudingly formed on the upper side of the housing 140. Meanwhile, as will be described later, a first through hole 152a or a groove of a corresponding shape may be formed in the outer frame 152 of the upper elastic member 150 corresponding to the upper frame support protrusion 144, where It may be fixed by adhesive or fusion, and fusion may include heat 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 be formed to protrude on the lower side of the housing 140. Meanwhile, an insertion groove 162a or a hole of 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 used. It can be fixed, and fusion may include thermal fusion or ultrasonic fusion.

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

The driving magnet 130 may be installed in a position corresponding to the coil 120 provided in the bobbin 110. In addition, the driving magnet 130 may be composed of one body, and in this embodiment, the surface facing the coil 120 of the bobbin 110 can be arranged so that the N pole and the outer surface can be arranged so that the S pole. there is. However, this is not limited, and it is also possible to configure it in the opposite way. Additionally, the driving magnet 130 may be divided into two by a plane perpendicular to the optical axis.

The driving magnet 130 is configured in a rectangular parallelepiped shape with a certain width, and is seated in the magnet through-hole 141a or groove, so that the wide surface of the driving magnet 130 is part of the side of the housing 140. can be formed. At this time, the driving magnets 130 facing each other may be installed parallel to each other. Additionally, the driving magnet 130 may be arranged to face the coil 120 of the bobbin 110. At this time, the surfaces of the driving magnet 130 and the coil 120 of the bobbin 110 facing each other may be arranged in a plane plane so that they are parallel to each other. However, this is not limited, and depending on the design, one of the driving magnet 130 and the coil 120 of the bobbin 110 may be flat, and the other may be curved. Alternatively, the facing surfaces of the coil 120 of the bobbin 110 and the driving magnet 130 may all be curved surfaces. In this case, the facing surfaces of the coil 120 of the bobbin 110 and the driving magnet 130 may be curved. The curvature of the surface can 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 a sensor, and the position sensor 180 is inserted, placed, 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 of the four sides 141 of the housing where the sensor through hole 141b or groove is provided.

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

The position sensor 180 may be a sensor that detects changes in magnetic force emitted from the sensing magnet 190 of the bobbin 110. Additionally, the position sensor 180 may be a Hall sensor. However, this is an example, and this embodiment is not limited to the Hall sensor. Any sensor that can detect changes in magnetic force can be used, and any sensor that can detect position in addition to magnetic force is possible, for example For example, a method using a photo reflector, etc. is also possible.

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

In addition, the printed circuit board 170 has a plurality of terminals 171 arranged so that external power can be applied to supply current to the coil 120 and the position sensor 180 of the bobbin 110. The number of terminals 171 formed on the printed circuit board 170 may increase or decrease depending on the types of components that require control. Meanwhile, according to this embodiment, the printed circuit board 170 may be prepared as an FPCB.

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

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 detected by the displacement detection unit. That is, the control unit may be configured to control the printed circuit board. It is mounted on (170). In addition, in another embodiment, the control unit may not be mounted on the printed circuit board 170 but on a separate board. This may be a board on which the image sensor of the camera module is mounted, or it may be a separate board. .

The actuator driving distance can be additionally calibrated based on the Hall voltage difference for the change in magnet flux (i.e., magnetic flux density) detected by the Hall sensor.

The bobbin 110 may be configured to reciprocate in the first axis direction with respect to the housing 140 fixed in the first axis direction. An auto-focusing function may be executed due to movement of the bobbin 110 in the first axis 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 can elastically support the upward and/or downward motion of the bobbin 110 in the optical axis direction. The upper elastic member 150 and the lower elastic member 160 may be provided as leaf springs.

As shown in FIGS. 2 to 4 and 9A to 11C, the upper elastic member 150 and the lower elastic member 160 are inner frames 151 and 161 and housing 140 coupled to the bobbin 110. It may include outer frames 152 and 162 coupled to each other and connection 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 of a certain shape. The bobbin 110 can be elastically (or elastically) supported in its upward and/or downward motion in the first direction of the optical axis through the change in position and slight deformation of the connecting portions 153 and 163.

In the lens driving device according to this 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 in particular, as shown in FIGS. 4 and 8. Likewise, it can 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.

At this time, 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 the upper elastic member ( At least one of 150) and the lower elastic member 160 includes the polyimide or polyamide described above, and may include a conductive material in a pattern to be described later.

According to this 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 152a 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 on the upper surface of the bobbin 110, which will be described later. It can be combined with the upper support protrusion provided. 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 connecting portion 153 may connect the inner frame 151 and the outer frame 152 so that the inner frame 151 is elastically deformable within a predetermined range in a first direction with respect to the outer frame 152. . That is, the connection portion 153 elastically connects the inner frame 151, which is fixed or coupled to the upper surface of the bobbin 110, and the outer frame 152, which is fixed or coupled to the upper surface of the housing 140. The bobbin 110 and the housing 140, which are separated into separate parts, can be elastically connected at the top by the upper elastic member 150.

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

The connection portion 153 may have an irregular width. In FIG. 9A, the connection portion 153 may include a second region 153a whose width is wider than other regions. The remaining area of the connection portion 153 excluding the second area 153a may be referred to as the first area, and the above-described second area 153a and the second area 163a described below may be referred to as parasitic areas. there is.

In FIG. 9A, the width (W ₁ ) of the first region of the connection portion 153 may be 30 micrometers to 60 micrometers, and the width (W ₂ ) of the second region (153a) may be the width (W _{1 )} of the first region. ) may be 1.2 times or more, but may be less than 2 times.

A plurality of connection parts 153 may be provided. In Figure 9a, there are four connection parts 153 connecting the inner frame 151 and the outer frame 152, and the shapes of the four connection parts 153 are the same. It may be symmetrical about the center of the inner frame 151 or the outer frame 152.

In the illustrated embodiments, the connection portions 153 are each formed in a pattern bent three times. In FIG. 9A, one pattern forms the second region 153a and is wider than the other region, and in FIG. 9B, two patterns are formed. This second area 153a is wider than other areas, and in Figure 9c, three patterns form the second area 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 or holes in the inner frame 161. A groove can be provided.

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

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

The lower elastic member 160 may include a first lower elastic member 160a and a second lower elastic member 160b that are separated from each other as shown in FIG. 10A. Through this two-part structure, the lower elastic member 160 can receive power supplies of different polarities or different power supplies 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 corresponds to both end lines of the coil 120 disposed on the bobbin 110. By providing a solder portion at the position of , power of different polarity or different power sources can be applied by performing a conductive connection such as soldering at the solder portion. In addition, the first lower elastic member is electrically connected to one of the two end wires of the coil, and the second lower elastic member is electrically connected to the other one of the two end wires of the coil to apply a current and/or voltage from the outside. You can receive it.

Meanwhile, the upper elastic member 150 and lower elastic member 160, the bobbin 110, and the housing 140 may be assembled through heat fusion and/or bonding using an adhesive, etc. At this time, the fixing work can be completed by heat fusion fixation according to the assembly sequence and then bonding using adhesive.

As a modified example, the upper elastic member 150 may be configured as a two-part structure, and the lower elastic member 160 may be configured as 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 portion electrically connected to at least one of the coil 120 of the bobbin 110 and the printed circuit board 170. At least one may be provided.

The damping unit 410 may function as an attenuator to absorb vibration in the direction of the optical axis that occurs when the lens driving device 100 operates a lens or autofocusing operation. The damping unit 410 is formed between a fixed body that does not move and is fixed in its original position when the auto-focusing operation of the lens driving device 100 is performed and/or a moving object that moves in the direction of the optical axis when the auto-focusing operation of the lens driving device 100 is performed. It can be provided in . The fixed body may be, for example, the cover member 300, or the housing 140, or the base 210, or the outer frame of the upper elastic member 150 and/or the lower elastic member 160, and the movable body. may be the 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, etc.

In FIG. 10A, the width (d ₁ ) of the first region of the connection portion 163 may be 30 micrometers to 60 micrometers, and the width (d ₂ ) of the second region (163a) may be the width (d _{1 )} of the first region. ) may be 1.2 times or more, but may be less than 2 times.

A plurality of connection parts 163 may be provided. In Figure 10a, there are four connection parts 163 connecting the inner frame 161 and the outer frame 162, and the shapes of the four connection parts 163 are the same. It may be symmetrical about the center of the inner frame 161 or the outer frame 162.

In the illustrated embodiments, each of the connection portions 163 is formed in a pattern bent twice. In FIG. 10A, one pattern forms the second region 163a and is wider than the other region, and in FIG. 10B, two patterns are formed. This constitutes the second area 163a.

11A to 11C are diagrams schematically showing the arrangement of dampers according to one embodiment of the present invention.

In FIGS. 11A and 11B, a damper 158 is disposed connecting the housing and the connection portion 153. The damper 158 is made of silicon and is disposed in contact with one pattern forming the connection portion 153, or FIG. 11C. It may be placed in contact with all three patterns forming the connection portion 153, as shown.

And, in FIGS. 11A to 11C, the dampers 158 are disposed at each connection portion 153, and may be disposed symmetrically with respect to the center of the inner frame 151 or the outer frame 152.

Figure 12 is a schematic perspective view of a bobbin according to an embodiment of this embodiment, Figure 13 is a schematic bottom perspective view of a bobbin according to an embodiment of this embodiment, and Figure 14 is a schematic perspective view of a bobbin according to an embodiment of this 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 the receiving groove according to one embodiment of the present embodiment, Figure 18 is a schematic longitudinal cross-sectional view of a bobbin according to one embodiment of the present embodiment.

As shown in FIGS. 12 to 18, the bobbin 110 may be installed in the inner space of the housing 140 to be reciprocatable in the direction of the optical axis. A coil 120, which will be described later, is installed on the outer peripheral surface of the bobbin 110 to enable electromagnetic interaction with the driving magnet 130 of the housing 140, so that the coil 120 and the driving magnet 130 are electromagnetic. Due to the miraculous interaction, the bobbin 110 may be reciprocated in the first direction. In addition, the bobbin 110 is elastically (or elastically) supported by the upper elastic member 150 and the lower elastic member 160, and can move 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 can be coupled to the inside of the bobbin 110 in various ways. For example, a female thread may be formed on the inner peripheral surface of the bobbin 110, and a male thread corresponding to the thread may be formed on the outer peripheral surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screwing them together. However, this is not limited, and the lens barrel may be directly fixed to the inside of the bobbin 110 using a method other than screwing, without forming a thread on the inner peripheral surface of the bobbin 110. Alternatively, it is also possible for the one or more lenses to be formed integrally with the bobbin 110 without a lens barrel. The lens coupled to the lens barrel may be composed of one piece, or two or more lenses may be configured to form an optical system.

Additionally, a plurality of upper support protrusions 113 and a plurality of lower support protrusions 114 may be formed to 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 secure the inner frame 151 of the upper elastic member 150 and the bobbin 110. According to this embodiment, a second through hole 151a or a groove may be formed at 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 groove may be fixed by heat fusion or may be fixed with an adhesive member such as epoxy. Additionally, a plurality of upper support protrusions may be provided. At this time, the distance between each upper support protrusion can be appropriately arranged within a range to 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 although their spacing is not constant, they may be symmetrical with respect to a specific imaginary 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 above-mentioned upper support protrusion, and connects the inner frame 161 and the bobbin 110 of the lower elastic member 160. Can be combined and fixed. According to this 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 groove may be fixed by heat fusion or may be fixed with an adhesive member such as epoxy. Additionally, a plurality of lower support protrusions 114 may be provided as shown in FIG. 13 . At this time, the distance between each lower support protrusion 114 can be appropriately arranged within a range to avoid interference with surrounding components. That is, each lower support protrusion 114 may be arranged symmetrically at regular intervals with respect to the center of the bobbin 110.

And, on the upper and lower surfaces of the bobbin 110, an upper escape groove 112 and a A lower escape groove 118 is formed.

By providing the upper escape groove 112 and the lower escape groove 118, when the bobbin 110 moves in the first direction with respect to the housing 140, the spatial space between the connection portions 153 and 163 and the bobbin 110 By eliminating interference, elastic deformation of the connection portions 153 and 163 can be made easier. Additionally, the location of the upper escape groove may be located at a corner of the housing as in the embodiment, but may also be located on the side depending on the shape and/or location of the connection part of the elastic member.

Additionally, a coil seating groove 116 in which the coil 120 is installed may be provided on the outer peripheral 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 peripheral surface of the bobbin 110 or the coil seating groove 116 or seating portion, but this is not limited and the coil 120 The winding may be done directly on the outer peripheral surface of the bobbin 110 or in the coil seating groove 116 or seating portion.

According to this embodiment, the coil 120 may be formed into 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. Additionally, at least four sides of the coil 120 may be straight, and the corners connecting these sides may be round or straight. At this time, the straight portion may be formed to be a surface corresponding to the driving magnet 130. Additionally, the surface of the driving magnet 130 corresponding to the coil 120 may have the same curvature as that of the coil 120. That is, if the coil 120 is straight, the surface of the corresponding driving magnet 130 may be straight, and if the coil 120 is curved, the surface of the corresponding driving magnet 130 may be curved. and may also have the same curvature. Additionally, even if the coil 120 is curved, the surface of the corresponding driving magnet 130 may be straight, or vice versa.

The coil 120 is intended to perform an autofocus function by moving the bobbin 110 in the direction of the optical axis. When current is supplied, electromagnetic force can be formed through electromagnetic interaction with the driving magnet 130. Electromagnetic force can move the bobbin 110.

Meanwhile, the coil 120 may be configured to correspond to the driving magnet 130. As shown, the driving magnet 130 is composed of a single body, so that the entire surface facing the coil 120 has the same polarity. When provided to have, the coil 120 may also be configured so that a surface corresponding to the driving magnet 130 has the same polarity. Meanwhile, although not shown, if the driving magnet 130 is divided into two on a side perpendicular to the optical axis and the side facing the coil 120 is divided into two or more, the coil 120 is also divided into two or more sides. It is also possible to divide the driving magnets 130 into corresponding numbers.

In addition, the bobbin 110 may be provided with a sensing magnet 190 included in the displacement detection unit along with the position detection sensor 180 of the housing 140 described above. The sensing magnet 190 may be fixed, placed, or coupled to the bobbin 110. Because of this, 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. Additionally, the sensing magnet 190 may be composed of one body, and may be arranged so that the upper direction of the bobbin 110 is the N pole and the lower direction of the bobbin 110 is the S pole. However, this is not limited, and it is also possible to configure it in the opposite way. Additionally, the sensing magnet 190 may be divided into two by a plane perpendicular to the optical axis.

Here, as shown in FIGS. 14 to 18, the bobbin 110 may be provided with a receiving groove 117 for receiving the sensing magnet 190 on the outer peripheral surface of the bobbin 110.

The receiving groove 117 may be formed from the outer surface of the bobbin 110 to the inside of the bobbin 110 at a predetermined depth.

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. Additionally, at least a portion of the receiving groove 117 may be formed to be concave at a predetermined depth further inside the bobbin 110 than the coil seating groove 116. In this way, by forming the receiving groove 117 in the inner direction of the bobbin 110, the sensing magnet 190 can be accommodated inside the bobbin 110, and as a result, a separate device for the sensing magnet 190 is required. Since there is no need to secure 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 sensor 180 of the housing 140 (or a position opposite to the position sensor 180). Due to this, 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 here. Since the distance between them can be further included and minimized to that distance, the magnetic force detection accuracy of the position detection sensor 180 can be improved.

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

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 distance from the inner surface so that adhesive can be injected. It may include an adhesive groove 117b that is concavely formed deeper inward.

The inner surface is a surface located in the inner direction 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 contacted or seated. am.

The adhesive groove 117b may be a groove in which a portion of the inner surface is formed to be more deeply concave in an inward direction toward the center of the bobbin 110. The adhesive groove 117b may preferably be formed from the opening 119 to one inner surface of the bobbin 110 where one surface of the sensing magnet 190 is contacted, seated, or disposed.

As shown in FIG. 18, the adhesive groove 117b may further include a first additional groove 117c formed longer than the length of the sensing magnet 190 in the vertical thickness direction of the bobbin 110. You can. That is, the first additional groove 117c is an extension of the adhesive groove 117b that is concave deeper than the inner surface of the bobbin 110 on which the back surface of the sensing magnet 190 is contacted, seated, or disposed. am. By providing the first additional groove (117c), when the adhesive is injected into the adhesive groove (117b) through the opening 119, the adhesive is filled from the first additional groove (117c) to fill the inside of the adhesive groove (117b). Since the filling prevents the adhesive from overflowing in the adhesive groove (117b) and flowing to the coil 120 along the gap between the sensing magnet 190 and the receiving groove 117, the sensing magnet 190 ) can reduce the incidence of defects in the lens driving device 100 during the coupling process.

The adhesive groove 117b may further include a second additional groove 117a formed at a predetermined depth in an inward direction 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 near the opening 119. The second additional groove 117a is in communication with the adhesive groove 117b. In other words, the second additional groove 117a is an extension of the adhesive 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 forms a coil ( 120), etc., adhesion to other components of the bobbin 110 can be prevented, thereby reducing the incidence of defects in the lens driving device 100 during the coupling process of the sensing magnet 190.

As a modified example, the second additional groove 117a may be provided alone in the bobbin 110 without the adhesive groove 117b. In this case, the bobbin 110 and the sensing magnet 190 can be coupled and fixed by injecting adhesive into the second additional groove 117a.

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

As a modified embodiment, the receiving groove has a depth between the inner surface on which one surface (i.e., the wide surface) of the sensing magnet is supported and the outer circumferential surface on which the coil is provided (i.e., the surface of the seating groove for the coil). It may be less than the thickness of the magnet. Because of this, the sensing magnet can be fixed in the receiving groove by the inner pressing force of the coil due to winding of the coil. In this case, there is no need to use adhesive.

As an additional 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 receiving groove 117 formed on the outer peripheral surface of the bobbin 110 at the position provided, and a weight balance member accommodated in the additional receiving groove 117.

That is, the additional receiving groove 117 is a bobbin with a predetermined depth at a position symmetrical to 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). In addition, the weight balance member is fixed and coupled within the additional receiving groove 117 and has the same weight as the magnetic force sensing member.

In this way, by providing the additional receiving groove 117 and the weight balancing member, the horizontal weight imbalance of the bobbin 110 due to the provision of the receiving groove 117 and the sensing magnet 190 is reduced by the installation of the weight balancing member. Compensation is possible.

Additionally, 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.

Figure 19 is a diagram showing the relationship between gain and phase in the lens driving device according to the embodiment. In the embodiment, when the upper elastic member is made of a material such as polyimide and is integrated with the printed circuit board, ' As shown in the graph shown in 'B', the peak value may be lowered and the frequency may change, and when a parasitic area is provided within the connection between the damper and the upper elastic member or the lower elastic member, the peak value shown in 'A' and 'C' may occur. By lowering the peak value and changing the frequency in this area, noise can be suppressed and oscillation phenomenon prevented when driving a vibration motor, etc.

Figures 20a to 20c show the oscillation phenomenon that occurs when the gain is gradually increased in the lens driving device, and in Figure 21, as in the above-described embodiment, the upper or lower elastic members are manufactured from the same material as the FPCB, or the damper and the upper elastic member are manufactured. It shows that a parasitic area is provided in the elastic member or the connection part of the lower elastic member, so that the frequency characteristics are changed and the oscillation phenomenon is prevented.

Additionally, it may include a lens driving device configured as described above, a lens barrel coupled to a bobbin, an image sensor, and a printed circuit board. At this time, the printed circuit board has an image sensor mounted on it and can form the bottom surface of the camera module.

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

The lens may be composed of one sheet, or two or more lenses may be configured to form an optical system. The base may additionally have an infrared cut-off filter installed at a position corresponding to the image sensor, and may be combined with the housing.

Additionally, the lower side of the housing can 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 form the terminal integrally using surface electrodes, etc.

Meanwhile, the base may function as a sensor holder that protects the image sensor, and in this case, a protrusion may be formed in the downward direction along the side of the base. However, this is not an essential configuration, and although not shown, a separate sensor holder may be placed at the bottom of the base to perform that role.

In the above, a specific embodiment has been shown and described to illustrate the technical idea of the present embodiment, but the present embodiment is not limited to the same configuration and operation as the specific embodiment as described above, and various modifications may be made without departing from the scope of the present embodiment. It can be carried out within. Therefore, such modifications should also be considered as belonging to the scope of this embodiment, and the scope of this embodiment may be determined by the claims described later.

100: Lens driving device 110: Bobbin
120: Coil 130: Driving magnet
140: Housing 150: Upper elastic member
153, 163: Connection 160: Lower elastic member
170: printed circuit board 180: position detection sensor
190: Magnet for sensing 210: Base
300: Cover member 410: Damping part

Claims (18)

housing;
a bobbin disposed within the housing;
a first magnet disposed in the housing;
a coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the first magnet;
An upper elastic member including an outer frame coupled to the housing, an inner frame coupled to the bobbin, and a connection portion including a first end connected to the outer frame and a second end connected to the inner frame; and
Including a damper disposed at the connection portion,
The connection portion includes a first bent portion, a second bent portion, and a third bent portion,
Among the first to third bent portions, the first bent portion is located closest to the first end, the third bent portion is located closest to the second end, and the second bent portion is located closest to the first bent portion and the second bent portion. 3 Located between the bends,
The damper is located closest to the first bent part among the first to third bent parts. According to paragraph 1,
A lens driving device wherein the damper is in contact with a portion of the housing. According to paragraph 1,
a second magnet disposed on the bobbin; and
A lens driving device including a position sensor for detecting displacement of the bobbin. According to paragraph 1,
A lens driving device wherein the damper is disposed closer to the first end of the connection portion than to the second end of the connection portion. According to paragraph 3,
The first magnet includes a first magnet unit disposed on a first side of the housing and a second magnet unit disposed on a second side of the housing,
The second magnet is a lens driving device disposed on an outer surface of the bobbin opposite to a third side of the housing located between the first side and the second side. According to paragraph 3,
A lens driving device in which the position sensor is a Hall sensor that detects a change in magnetic force emitted from the second magnet. According to paragraph 1,
A lens driving device wherein the coil is electrically connected to the upper elastic member. According to paragraph 3,
The bobbin is a lens driving device including a groove in which at least a portion of the second magnet is disposed. According to paragraph 1,
The connection part is,
a first connection portion connecting a first area of the outer frame and a second area of the inner frame; and
It includes a second connection portion connecting a third region of the outer frame and a fourth region of the inner frame,
The damper is a lens driving device including a first damper connected to the first connection part and a second damper connected to the second connection part. According to paragraph 1,
The damper is a lens driving device spaced apart from the inner frame. According to paragraph 1,
The damper is a lens driving device spaced apart from the first end and the second end of the connection part. According to paragraph 1,
A lens driving device in which the damper is formed of a silicon material. According to paragraph 1,
A lens driving device wherein the damper is disposed closer to the outer frame than to the inner frame. housing;
a bobbin disposed within the housing;
a first magnet disposed in the housing;
a coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the first magnet;
an upper elastic member including an outer frame coupled to the housing, an inner frame coupled to the bobbin, and a connection portion connecting the outer frame and the inner frame; and
Includes a damper connecting the connection portion and the housing,
The connection part is,
A first end connected to the first area of the outer frame, a second end connected to the second area of the inner frame, a first bent part located between the first end and the second end, and a second bend a first connection portion including a portion and a third bent portion; and
A third end connected to the third region of the outer frame, a fourth end connected to the fourth region of the inner frame, a fourth bent portion, and a fifth bend located between the third end and the fourth end. It includes a second connection portion including a portion and a sixth bent portion,
The damper includes a first damper in contact with the first connection portion and a second damper in contact with the second connection portion,
Among the first to third bent portions, the first bent portion is located closest to the first end, the third bent portion is located closest to the second end, and the second bent portion is located closest to the first bent portion and the second bent portion. 3 Located between the bends,
The first damper is a lens driving device located closest to the first bent part among the first to third bent parts. According to clause 14,
Among the fourth to sixth bends, the fourth bend is located closest to the third end, the sixth bend is located closest to the fourth end, and the fifth bend is located closest to the fourth bend and the fourth end. 6 Located between the bends,
The second damper is located closest to the fourth bent part among the fourth to sixth bent parts. According to clause 14,
The first damper is spaced apart from the first end and the second end,
The second damper is spaced apart from the third end and the fourth end. According to clause 14,
The first damper is disposed closer to the first end than the second end,
The second damper is disposed closer to the third end than the fourth end. housing;
a bobbin disposed within the housing;
a first magnet disposed in the housing; and
A lens driving device including a coil disposed on the bobbin and moving the bobbin in the optical axis direction by interacting with the first magnet.