KR102285248B1 - Lens moving apparatus - Google Patents

Abstract

In this embodiment, by dividing both ends of the coil up and down and electrically connecting to the printed circuit board through the upper elastic member and the lower elastic member, the printed circuit board is used as an intermediate connection means to electrically connect an external power source to the coil as a result. can For this reason, in the present embodiment, the connection points of both ends of the coil of the bobbin can be divided into an upper elastic member and a lower elastic member, and thus a connection working space between the coil and an external power source can be sufficiently secured.

Description

Lens drive device {LENS MOVING APPARATUS}

The present embodiment relates to a lens driving device, and more particularly, to a lens driving device capable of reducing a focus alignment time of a lens by feeding back an amount of displacement in an optical axis direction of a lens while improving spatial efficiency of a bobbin.

In recent years, the development of IT products such as a mobile phone, a smart phone, a tablet PC, and a notebook computer with a built-in micro digital camera is being actively conducted.

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.

However, the conventional miniature digital camera has a problem in that a working space for connection (eg, soldering or soldering) between a coil and an external power source is narrow in order to perform an autofocus function.

Accordingly, an object of the present embodiment is to provide a lens driving device that solves the problems of the prior art.

Specifically, an object of the present embodiment is to provide a lens driving device capable of securing a connection working space between a coil of a bobbin and an external power supply for supplying current to the coil.

Another object of the present embodiment is to provide a lens driving device capable of securing a connection working space between a coil of a bobbin and an external power supply for supplying current to the coil without increasing the manufacturing cost of the upper elastic member and the lower elastic member. .

According to one embodiment of the present embodiment, the present embodiment includes a housing having a hollow column shape for supporting a driving magnet; a bobbin having a coil disposed inside the driving magnet on an outer circumferential surface and moving in a first direction parallel to the optical axis inside the housing by electromagnetic interaction between the driving magnet and the coil; an upper elastic member and a lower elastic member elastically connecting the housing and the bobbin and electrically connected to both ends of the coil; and a printed circuit board provided on one side of the housing and including an input terminal part and an output terminal part electrically connected to an external power source, wherein the upper elastic member is electrically connected to one terminal part of the input terminal part and the output terminal part and the lower elastic member is electrically connected to the other terminal of the input terminal and the output terminal.

In addition, preferably, the upper elastic member and the lower elastic member, an inner frame coupled to one of the upper and lower surfaces of the bobbin, and an outer frame coupled to one of the upper and lower surfaces of the housing; , It characterized in that it comprises a connection portion for elastically connecting the inner frame and the outer frame.

Preferably, the one terminal part and the other terminal part are provided from the bottom of the printed circuit board toward the outside.

Also, preferably, the one terminal part is provided at the same height as the upper elastic member on the inner surface of the printed circuit board and is electrically connected to the upper connection terminal part electrically connected to the upper elastic member, The other terminal part is provided at the same height as the lower elastic member on the inner surface of the printed circuit board and is electrically connected to the lower connection terminal part electrically connected to the lower elastic member.

Also, preferably, the one terminal part and the upper connection terminal part are electrically connected by one printed circuit among a plurality of printed circuits provided on the printed circuit board, and the other terminal part and the lower connection part are connected to each other. The terminal unit for use is characterized in that it is electrically connected by the other one of the plurality of printed circuits provided on the printed circuit board.

Also, preferably, one end line of both end lines of the coil is electrically connected to the inner frame of the lower elastic member, and the other end line of both end lines of the coil is electrically connected to the inner frame of the upper elastic member. characterized in that it is connected to

Also, preferably, the outer frame of the upper elastic member is provided in a horizontal outward direction and includes a first intermediate terminal portion electrically connected to the one terminal portion, and the outer frame of the lower elastic member is provided in a horizontal outward direction. and a second intermediate terminal part electrically connected to the other terminal part.

In addition, preferably, the first intermediate terminal portion and the second intermediate terminal portion is characterized in that it is provided on one side opposite to the inner surface of the printed circuit board in the outer frame.

In addition, preferably, the first intermediate terminal portion is provided at the same height as the upper elastic member on the inner surface of the printed circuit board and is electrically connected to an upper connection terminal portion electrically connected to the one terminal portion, The second intermediate terminal portion is provided at the same height as the lower elastic member on the inner surface of the printed circuit board and is electrically connected to a lower connection terminal portion electrically connected to the other terminal portion.

In addition, preferably, the first intermediate terminal portion and the second intermediate terminal portion is characterized in that it has a flow path limiting cutout formed by cutting some outer portions of the outer frame from both sides.

In addition, preferably, the housing includes a first avoidance cutout formed to a predetermined depth under the first intermediate terminal part on the outer surface opposite to the inner surface of the printed circuit board, and the inside of the printed circuit board It is characterized in that it comprises a second avoidance cutout formed at a predetermined height on the upper portion of the second intermediate terminal portion on the outer surface opposite to the side surface.

In addition, preferably, the coil is characterized in that it is wound in three or six layers on the outer peripheral surface of the bobbin.

In addition, preferably, the bobbin is characterized in that it further comprises a displacement sensor for determining a first displacement value in the first direction.

Also, preferably, the displacement sensing unit corresponds to a sensing magnet provided on the inside of the printed circuit board in the bobbin, and the sensing magnet from an inner surface of the printed circuit board provided on one side of the housing It is provided at a position to be, characterized in that it comprises a position detection sensor for detecting a first displacement value in the first direction of the sensing magnet.

In addition, preferably, the bobbin, characterized in that it further comprises a receiving groove formed in the inner direction of a predetermined depth on the outer peripheral surface of the bobbin to accommodate the sensing magnet.

According to the above-described problem solving means, this embodiment divides both ends of the coil up and down and electrically connects to the printed circuit board through the upper elastic member and the lower elastic member, so that the printed circuit board is used as an intermediate connecting means. An external power supply can be electrically connected to the coil. For this reason, in the present embodiment, the connection points of both ends of the coil of the bobbin can be divided into an upper elastic member and a lower elastic member, and thus a connection working space between the coil and an external power source can be sufficiently secured.

In addition, in this embodiment, the upper elastic member and the lower elastic member are coiled without adding a separate configuration to the upper elastic member and the lower elastic member by simply forming a flow path limiting cutout in the outer frame of the upper elastic member and the lower elastic member. It can be used as an intermediate connecting means of Accordingly, in the present embodiment, it is possible to secure a connection working space between the coil of the bobbin and an external power supply for supplying current to the coil without increasing the manufacturing cost of the upper elastic member and the lower elastic member.

Also, according to the present embodiment, it is possible to prevent the fluid conductive material (for example, soldering liquid when the connection process is soldering) from flowing to components other than the terminal part during the connection process between the coil and the external power supply. For this reason, the present embodiment can prevent melting or damage to the base material such as the housing or the printed circuit board due to the high-temperature fluid conductive material generated during the connection process, thereby significantly reducing the defect rate of the lens driving device. .

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;
9 is a schematic plan view of an upper elastic member according to an embodiment of the present embodiment;
10 is a schematic plan view of a lower elastic member according to an embodiment of the present embodiment;
11 is a schematic perspective view of a printed circuit board according to an embodiment of the present embodiment;
12 is a schematic perspective view of a bobbin according to an 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 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;
19 is a schematic partial longitudinal sectional view of a lens driving device according to an embodiment of the present embodiment;
20 is a schematic partial enlarged perspective view of an upper part of a lens driving device according to an embodiment of the present embodiment;
21 is a schematic partially cutaway perspective view of the upper part of the lens driving device of FIG. 20;
22 is a schematic perspective view of a lower portion of a lens driving device according to an embodiment of the present embodiment;
23 is a schematic partial enlarged perspective view of a lower part of the lens driving device according to an embodiment of the present embodiment.

Hereinafter, a preferred embodiment of the present embodiment will be described so that a person of ordinary skill in the art can easily implement it with reference to the accompanying drawings. In the accompanying drawings, it should be noted that the same reference numbers 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 will be omitted. In addition, certain features presented in the drawings are enlarged, reduced, or simplified for ease of description, and the drawings and components thereof are not necessarily drawn to scale. However, those skilled in the art will readily appreciate these details.

For reference, in FIGS. 1 to 18 , a Cartesian coordinate system (x, y, z) may be used. In the drawings, the x-axis and 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. .

1 is a schematic perspective view of a lens driving device 100 according to an embodiment of the present embodiment, FIG. 2 is a schematic exploded perspective view of a lens driving device 100 according to an embodiment of the present embodiment, and FIG. 3 is 1 is a schematic perspective view of the lens driving device 100 with the cover member 300 removed, FIG. 4 is a schematic plan view of FIG. 3 , and FIG. 5 is a schematic view of the housing 140 according to an embodiment of the present embodiment is a perspective view, FIG. 6 is a schematic perspective view of the housing 140 viewed from an angle different from FIG. 5 , FIG. 7 is a schematic bottom perspective view of the housing 140 according to an embodiment of the present embodiment, and FIG. 8 is this view It is a schematic exploded perspective view of the housing 140 according to an embodiment of the present embodiment, FIG. 9 is a schematic plan view of the upper elastic member 150 according to an embodiment of the present embodiment, and FIG. 10 is an embodiment of the present embodiment. is a schematic plan view of the lower elastic member 160 according to, Figure 11 is a schematic perspective view of the printed circuit board 170 according to an embodiment of the present embodiment,

The lens driving device 100 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 100 is a device that performs an auto-focusing function.

1 to 4 , the lens driving device 100 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 . and a displacement sensing unit that determines an amount of displacement in the optical axis direction (ie, the first direction).

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 are accommodated.

The cover member 300 has 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 (that is, 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 concave portion. That is, the adhesive member applied to the concave portion fills a gap between the opposing surfaces 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) may be sealed, and the side surface may 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 is 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. Due to this, 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 has a bottom 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 stepped 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 has an opening near the center. The opening may be formed at a position corresponding to the position of the image sensor disposed in the camera module.

In addition, the base 210 includes 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 part 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 9 , 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 or more 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 is accommodated.

The housing 140 has 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. 9 , 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, 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 is a through hole for a sensor into which a position detection sensor 180, which will be described later, is inserted, disposed, fixed, or seated. (141b) may be provided. 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-fitting. 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 , each of the four side surfaces 141 of the housing 140 has through-holes for the first and second magnets in which the driving magnet 130 is seated, disposed or fixed. (141a) (141a') may be provided. And, among the four side surfaces 141 of the housing 140, on one side orthogonal to the both sides, or on a side other than the both sides, a third through-hole for a magnet and a through-hole for the third magnet are spaced apart by a predetermined distance for a sensor. 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 should 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 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 guides the bobbin 110 to move in the first direction easily and accurately.

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. 9, the first 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 is 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 the outer surface may be an S pole. there is. 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 predetermined 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. In addition, 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 detection 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 method. 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.

As shown in FIGS. 8 and 11 , 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 has a plurality of terminals 171 disposed therein, 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 this embodiment, the printed circuit board 170 may be provided as an FPCB.

A plurality of terminals 171 provided on the printed circuit board 170 are arranged in a line below the printed circuit board 170 in a state where the printed circuit board 170 is mounted on one side of the housing 140 . can be placed.

In addition, the plurality of terminals 171 are electrically connected to an external power source provided in an electronic device to which the lens driving device is mounted, and an input terminal unit 174 to which a current of the external power is input, and the external power source. and an output terminal unit 175 that returns to the external power source after the current of the external power passes through the coil of the bobbin, the upper connection terminal 176 electrically connected to the upper elastic member, and the lower elastic member It includes a terminal portion 177 for the lower connection to be.

At this time, it is preferable that the input terminal unit 174 and the output terminal unit 175 are provided from the bottom of the printed circuit board 170 toward the outside. This is to secure a connection working space from the outside of the lens driving device when the lens driving device is mounted on an electronic device.

For example, as shown in FIGS. 8 and 11 , the input terminal unit 174 is for the lower connection by one printed circuit 174a among a plurality of printed circuits provided on the printed circuit board 170 . It is electrically connected to the terminal unit 177, and the output terminal unit 175 is the upper connection terminal unit 176 by the other printed circuit 175a among a plurality of printed circuits provided on the printed circuit board 170. can be electrically connected to.

Of course, on the contrary, the input terminal unit 174 is electrically connected to the upper connection terminal unit 176 by the other printed circuit 175a among a plurality of printed circuits provided on the printed circuit board 170, The output terminal unit 175 may be configured to be electrically connected to the lower connection terminal unit 177 by one printed circuit 174a among a plurality of printed circuits provided on the printed circuit board 170 .

Here, the upper connection terminal part 176 and the lower connection terminal part 177 may be provided on the inner surface of the printed circuit board 170 . This is to electrically connect the upper and lower elastic members and the upper connection terminal 176 and the lower connection terminal 177, as will be described later.

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 sensing unit, that is, the control unit is the printed circuit board It is mounted on 170. Further, in another embodiment, the control unit may be mounted on a separate board instead of being mounted on the printed circuit board 170, which may be a board on which the image sensor of the camera module is mounted, or may be a separate board. .

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 the movement of the bobbin 110 in the first axial direction.

The bobbin 110 will 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.

2 to 4, 9 and 10, the upper elastic member 150 and the lower elastic member 160 are the inner frames 151 and 161 coupled to the bobbin 110 and the housing 140. ) may include outer frames 152 and 162 coupled to the inner frames 151 and 161 and connecting portions 153 and 163 connecting the outer frames 152 and 162 to each other.

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 the 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 the minute deformation.

According to the present embodiment, as shown in FIG. 9 , the upper elastic member 150 elastically connects the upper portion of the housing 140 and the upper portion of the bobbin 110 . In addition, 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 151a in the inner frame 151 .

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 to be described later. It is coupled 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 connects the inner frame 151 and the outer frame 152 so that the inner frame 151 is elastically deformable in a predetermined range with respect to the outer frame 152 in the first direction.

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 of the bobbin 110 and the printed circuit board 170 . may be provided with at least one or more.

For example, the upper elastic member 150 includes a first intermediate terminal part 156 electrically connected to the upper connection terminal part 176 of the printed circuit board 170 in the outer frame 152 . In addition, the other end wire 120b of both ends of the coil 120 may be electrically connected to the inner frame 151 of the upper elastic member 150 through a conductive means such as soldering or a soldering part. This will be described in more detail below with reference to the drawings.

10 , the lower elastic member 160 elastically connects the lower portion of the housing 140 and the lower portion of the bobbin 110 . In addition, the lower elastic member 160 may have a plurality of insertion grooves 162a or holes in the outer frame 162 , and a plurality of third through holes 161a or grooves in the inner frame 161 . .

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 is coupled with the lower support protrusion 114 provided in the . That is, the outer frame 162 is fixed and coupled to the housing 140 through an insertion groove 162a or a hole, and the inner frame 161 is attached to the bobbin 110 through a third through hole 161a or a groove. It can be fixed and joined.

The connection part 163 connects 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.

The lower elastic member 160 may be configured the same as or substantially the same as the upper elastic member 150 as shown in FIG. 10 . After the inner frame 161 and the outer frame 162 are coupled to the bobbin 110 and the housing 140, respectively, the position of the inner frame corresponding to both ends of the coil 120 disposed on the bobbin 110 By providing a solder portion to the solder portion, the power or current may be applied by performing a conductive connection such as soldering in the solder portion.

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 thermal fusion.

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 and the printed circuit board 170 of the bobbin 110 . At least one may be provided.

For example, the lower elastic member 160 includes a second intermediate terminal portion 166 electrically connected to the lower connection terminal portion 177 of the printed circuit board 170 in the outer frame 152 . In addition, one end wire 120a of both ends of the coil 120 may be electrically connected to the inner frame 161 of the lower elastic member 160 through a conductive means such as soldering or a soldering part. This will be described in more detail below with reference to the drawings.

12 is a schematic perspective view of the bobbin 110 according to an embodiment of the present embodiment, FIG. 13 is a schematic bottom perspective view of the bobbin 110 according to an embodiment of the present embodiment, and FIG. A schematic exploded perspective view of the bobbin 110 according to the embodiment, 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 receiving according to an embodiment of the present embodiment It is a schematic partial enlarged perspective view of the groove 117, and FIG. 18 is a schematic longitudinal cross-sectional view of the bobbin 110 according to an embodiment of the present embodiment.

11 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 peripheral surface of the bobbin 110 , and a male thread corresponding to the thread may be formed on an outer peripheral surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screwing these threads. However, the present invention is not limited thereto, and the lens barrel may be directly fixed to the inside of the bobbin 110 by methods 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 each of the 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 . In this case, 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 connection parts 153 , 163 and the bobbin 110 are connected to each other. It is possible to more easily elastically deform the connection parts 153 and 163 by removing the spatial interference. In addition, the position of the upper escape groove may be arranged at the edge 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 peripheral 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 peripheral 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 an edge 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 . In addition, 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 corresponding driving magnet 130 may have a straight surface, and if the coil 120 is curved, the corresponding driving magnet 130 may have a curved surface. and may also have the same curvature. Also, even if the coil 120 is curved, the corresponding driving magnet 130 may have a straight surface, or vice versa.

Also, in this embodiment, the coil 120 may be wound on the outer peripheral surface of the bobbin 110 in three layers as shown in FIG. 19 . Of course, the coil 120 may be wound on the outer peripheral surface of the bobbin 110 in six layers. In this way, by winding the coil in three or six layers on the bobbin, one end wire 120a of both ends of the coil is positioned under the bobbin to correspond to the position of the lower elastic member, and among the both ends of the coil The other end line 120b may be positioned above the bobbin to correspond to the position of the upper elastic member. For this reason, in the present embodiment, the connection points of both ends of the coil of the bobbin can be divided into an upper elastic member and a lower elastic member, and thus a connection working space between the coil and an external power source can be sufficiently secured.

The coil 120 is for performing an autofocus function by moving the bobbin 110 in the optical axis direction. When 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 .

Meanwhile, 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 includes a sensing magnet 190 included in the displacement detecting unit together with the position detecting sensor 180 of the above-described housing 140 . 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 one 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 part 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 receiving groove 117 in the inner direction of the bobbin 110, the sensing magnet 190 can be accommodated in the bobbin 110, and thus a separate sensing magnet 190 for the sensing magnet 190 can be accommodated. 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 has an opening 119 communicating with the receiving groove 117 on one of the lower surface and the 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 one 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. am.

The bonding groove 117b may be a groove formed so that a portion of the inner surface is concave deeper 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 to be longer than the length of the sensing magnet 190 in the vertical thickness direction of the bobbin 110 . . 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. am. 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 bonding 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.

In addition, the bonding groove 117b further includes a second additional groove 117a formed to 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 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.

Also, 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 .

Preferably, 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, in the receiving groove, the depth between the inner surface on which one surface (ie, the wide surface) of the sensing magnet is supported and the outer peripheral surface on which the coil is provided (ie, the surface of the coil seating groove surface) 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 on which 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 with 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 due to the provision of the accommodating groove 117 and the sensing magnet 190 is reduced by the mounting of the weight balancing member. can be compensated

Preferably, 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 schematic partial longitudinal cross-sectional view of the lens driving device 100 according to an embodiment of the present embodiment, and FIG. 20 is a schematic partial view of an upper portion of the lens driving device 100 according to an embodiment of the present embodiment. It is an enlarged perspective view, FIG. 21 is a schematic partially cutaway perspective view of an upper part of the lens driving device 100 of FIG. 20, and FIG. 22 is a lower part of the lens driving device 100 according to an embodiment of the present embodiment. It is a schematic perspective view, and FIG. 23 is a schematic partial enlarged perspective view of a lower part of the lens driving device 100 according to an embodiment of the present embodiment.

9, 10 and 19 to 23 , the upper elastic member 150 includes an inner frame 151 coupled to the upper surface of the bobbin 110 , and the housing 140 . It includes an outer frame 152 coupled to the upper surface, and a connection portion 153 elastically connecting the inner frame 151 and the outer frame 152 . The lower elastic member 160 includes an inner frame 161 coupled to the lower surface of the bobbin 110 , an outer frame 162 coupled to the lower surface of the housing 140 , and the inner frame and a connection part 163 elastically connecting the 161 and the outer frame 162 .

One end line 120a of both end lines of the coil 120 is electrically connected to the inner frame 161 of the lower elastic member 160, and the other end line among both end lines of the coil 120 ( 120b) may be electrically connected to the inner frame 151 of the upper elastic member 150 . At this time, each of the one end line 120a and the other end line 120b is connected to the lower elastic member 160 through connection portions 168 and 158 (eg, a soldering portion or a soldering portion, etc.). may be electrically connected to the inner frame 161 of the , and the inner frame 151 of the upper elastic member 150, respectively.

And, as shown in FIGS. 19 to 23, the upper elastic member 150 is electrically connected to one of the input terminal 174 and the output terminal 175 of the printed circuit board 170, and , the lower elastic member 160 may be electrically connected to the other terminal of the input terminal 174 and the output terminal 175 of the printed circuit board 170 . Hereinafter, for clarity of explanation, the lower elastic member 160 is electrically connected to the input terminal unit 174, and the upper elastic member 150 is electrically connected to the output member. do it with

In this case, the input terminal unit 174 may be electrically connected to the lower connection terminal unit 177 by a single printed circuit 174a in the printed circuit board 170 .

The input terminal unit 174 may be provided to face outward from the bottom of the printed circuit board 170 when the printed circuit board 170 is coupled, fixed, or disposed on one side of the housing 140 . .

In addition, the lower connection terminal unit 177 is provided at the same height or different heights from the lower elastic member 160 on the inner surface of the printed circuit board 170 to be electrically connected to the lower elastic member 160 . can be Here, the lower connection terminal part 177 and the lower elastic member 160 may be connected to each other by a conductive connection means S (eg, a soldering part or a soldering part, etc.).

In addition, the output terminal unit 175 may be electrically connected to the upper connection terminal unit 176 by another printed circuit 175a in the printed circuit board 170 .

The output terminal unit 175 may be provided to face outward from the bottom of the printed circuit board 170 when the printed circuit board 170 is coupled, fixed, or disposed on one side of the housing 140 . . That is, the output terminal unit 175 may be arranged side by side in a line at the same height as the input terminal unit 174 .

In addition, the upper connection terminal portion 176 is provided at the same height or a different height from the upper elastic member 150 on the inner surface of the printed circuit board 170 to be electrically connected to the upper elastic member 150 . can be Here, the upper connection terminal 176 and the upper elastic member 150 may be connected to each other by a conductive connection means S (eg, a soldering part or a soldering part, etc.).

In the outer frame 152 of the upper elastic member 150, a first intermediate terminal portion ( 156) may be provided.

The first intermediate terminal part 156 may be provided in a horizontal outward direction from the outer frame 152 of the upper elastic member 150 .

In this case, the first intermediate terminal part 156 may be provided on one side opposite to the inner surface of the printed circuit board 170 in the outer frame 152 of the upper elastic member 150 . Specifically, the first intermediate terminal part 156 may be provided to face or contact the upper connection terminal part 176 at a position corresponding to the position of the upper connection terminal part 176 of the printed circuit board 170 . can

The first intermediate terminal part 156 may be electrically connected to the upper connection terminal part 176 of the printed circuit board 170 by a conductive connection means S (eg, a soldering part or a soldering part, etc.).

At this time, preferably, in the first intermediate terminal part 156, the end of the first intermediate terminal part 156 is on the same line as the outer surface of the outer frame 152 of the upper elastic member 150 or the outer frame ( 152) may be configured to be located more outside than the outer surface.

The first intermediate terminal portion 156 has a flow path limiting cutout 157 formed by cutting some outer portions of the outer frame 152 from both sides. That is, the outer frame 152 may include two passage limiting cutouts 157 spaced apart from each other by a predetermined interval in the lateral direction, and the first intermediate terminal portion 156 defined by the predetermined interval.

In this way, by forming the flow path limiting cutout 157 , the present embodiment provides a conductive connection between the first intermediate terminal portion 156 of the upper elastic member 150 and the upper connection terminal portion 176 of the printed circuit board 170 . As a means, the flow path of the fluid conductive material may be limited so that the fluid conductive material (eg, soldering liquid when the connection process is soldering) flows only in the first intermediate terminal part 156 during the connection process, and thus the terminal part It is possible to prevent the high-temperature fluid conductive material from flowing to other parts.

In addition, the housing 140 has a first avoidance cutout 142 formed at a predetermined depth in the lower portion of the first intermediate terminal portion 156 on the outer surface opposite to the inner surface of the printed circuit board 170 . to provide That is, the first avoidance cutout 142 may be formed to have a predetermined depth and a predetermined width in a downward direction from the lower portion of the first intermediate terminal portion 156 on the upper surface of the housing 140 . In addition, the first avoiding cutout 142 may be formed over the outer surface of the housing 140 .

Preferably, the width of the first avoidance cutout 142 may be greater than the width of the first intermediate terminal part 156 .

In this way, by providing the first avoidance cutout 142 , the present embodiment is between the first intermediate terminal portion 156 of the upper elastic member 150 and the upper connection terminal portion 176 of the printed circuit board 170 . The conductive connection means may prevent the outer surface of the housing 140 from melting due to heat emitted from the fluid conductive material (eg, soldering liquid when the connection process is soldering) during the connection process. That is, while spatially isolating a portion of the outer surface of the housing 140 and the first intermediate terminal portion 156 that receives high-temperature heat from the fluid conductive material, fluid conduction is performed at the lower portion of the first intermediate terminal portion 156 at the same time. It is possible to form an air-cooling space of the material, which occurs during the connection process between the first intermediate terminal portion 156 of the upper elastic member 150 and the upper connection terminal portion 176 of the printed circuit board 170 . It is possible to significantly reduce the defective rate of the housing 140 .

In the outer frame 162 of the lower elastic member 160, a second intermediate terminal portion ( 166) may be provided.

The second intermediate terminal part 166 may be provided in a horizontal outward direction from the outer frame 162 of the lower elastic member 160 .

In this case, the second intermediate terminal part 166 may be provided on one side of the outer frame 162 of the lower elastic member 160 opposite to the inner surface of the printed circuit board 170 . Specifically, the second intermediate terminal part 166 may be provided to face or contact the lower connection terminal part 177 at a position corresponding to the position of the lower connection terminal part 177 of the printed circuit board 170 . can

The second intermediate terminal part 166 may be electrically connected to the lower connection terminal part 177 of the printed circuit board 170 by a conductive connection means S (eg, a soldering part or a soldering part, etc.).

At this time, preferably, the second intermediate terminal portion 166 has the end of the second intermediate terminal portion 166 on the same line as the outer surface of the outer frame 162 of the lower elastic member 160 or the outer frame ( 162) may be configured to be located more outside than the outer surface.

The second intermediate terminal portion 166 has a flow path limiting cutout 167 formed by cutting some outer portions of the outer frame 162 from both sides. That is, the outer frame 162 may be provided with two flow path limiting cutouts 167 spaced apart from each other by a predetermined interval in the lateral direction, and the second intermediate terminal portion 166 defined by the predetermined interval.

In this way, by forming the flow path limiting cutout 167, the present embodiment provides a conductive connection between the second intermediate terminal portion 166 of the lower elastic member 160 and the lower connection terminal portion 177 of the printed circuit board 170 . As a means, the flow path of the fluid conductive material may be limited so that the fluid conductive material (eg, soldering liquid when the connection process is soldering) flows only in the second intermediate terminal part 166 during the connection process, and thus the terminal part It is possible to prevent the high-temperature fluid conductive material from flowing to other parts.

In addition, the housing 140 has a second avoidance cutout 145 formed at a predetermined height above the second intermediate terminal portion 166 on the outer surface opposite to the inner surface of the printed circuit board 170 . to provide That is, the second avoidance cutout 145 may be formed with a predetermined height and a predetermined width from the upper portion of the second intermediate terminal portion 166 to the upper portion of the lower surface of the housing 140 . In addition, the second avoidance cutout 145 may be formed over the outer surface of the housing 140 .

Preferably, the width of the second avoidance cutout 145 may be greater than the width of the second intermediate terminal portion 166 .

In this way, by providing the second avoidance cutout 145 , the present embodiment is between the second intermediate terminal portion 166 of the lower elastic member 160 and the lower connection terminal portion 177 of the printed circuit board 170 . The conductive connection means may prevent the outer surface of the housing 140 from melting due to heat emitted from the fluid conductive material (eg, soldering liquid when the connection process is soldering) during the connection process. That is, while spatially isolating a portion of the outer surface of the second intermediate terminal portion 166 and the housing 140, which receives high-temperature heat from the fluid conductive material, fluid conduction is performed on the upper portion of the second intermediate terminal portion 166 at the same time. It is possible to form an air cooling space of the material, which occurs during the connection process between the second intermediate terminal portion 166 of the lower elastic member 160 and the lower connection terminal portion 177 of the printed circuit board 170 . It is possible to significantly reduce the defective rate of the housing 140 .

According to this embodiment, the input and output process of the external power to the coil 120 is as follows.

First, the supply current of the external power passes through the input terminal unit 174 of the printed circuit board 170, and then through one printed circuit 174a and the lower connection terminal 177 of the printed circuit board 170. It may be supplied to the second intermediate terminal portion 166 of the outer frame 162 of the lower elastic member 160 . Thereafter, the supply current passes through the outer frame 162 , the connecting portion 163 and the inner frame 161 of the lower elastic member 160 from the second intermediate terminal portion 166 to one end line of both ends of the coil 120 . (120a) can be supplied. Thereafter, the supply current passes through the coil 120 and then flows to the inner frame of the upper elastic member 150 through the other end line 120b among both end wires of the coil 120 . Thereafter, the supply current flows to the inner frame 151 of the upper elastic member 150 , the connecting portion 153 , and the first intermediate terminal portion 156 of the outer frame 152 . Thereafter, the supply current passing through the first intermediate terminal portion 156 passes through the upper connection terminal portion 176 of the printed circuit board 170 and the other printed circuit 175a to the output terminal portion of the printed circuit board 170 ( 175) to return to the external power supply.

According to the above-described problem solving means, this embodiment divides both ends of the coil up and down and electrically connects to the printed circuit board through the upper elastic member and the lower elastic member, so that the printed circuit board is used as an intermediate connecting means. An external power supply can be electrically connected to the coil. For this reason, in the present embodiment, the connection points of both ends of the coil of the bobbin can be divided into an upper elastic member and a lower elastic member, and thus a connection working space between the coil and an external power source can be sufficiently secured.

In addition, in this embodiment, the upper elastic member and the lower elastic member are coiled without adding a separate configuration to the upper elastic member and the lower elastic member by simply forming a flow path limiting cutout in the outer frame of the upper elastic member and the lower elastic member. It can be used as an intermediate connecting means of Accordingly, in the present embodiment, it is possible to secure a connection working space between the coil of the bobbin and an external power supply for supplying current to the coil without increasing the manufacturing cost of the upper elastic member and the lower elastic member.

Also, according to the present embodiment, it is possible to prevent the fluid conductive material (for example, soldering liquid when the connection process is soldering) from flowing to components other than the terminal part during the connection process between the coil and the external power supply. For this reason, the present embodiment can prevent melting or damage to the base material such as the housing or the printed circuit board due to the high-temperature fluid conductive material generated during the connection process, thereby significantly reducing the defect rate of the lens driving device. .

In addition, the present embodiment may further include a camera module control unit in the camera module, and the first displacement value calculated based on the current change value detected by the displacement detection unit and the lens according to the distance between the subject and the lens Compare the focal lengths. Thereafter, the camera module control unit readjusts the amount of current applied to the coil 120 of the bobbin 110 when the first displacement value or the current position of the lens and the focal length of the lens do not correspond to the bobbin 110 . may be moved by a second displacement amount in the first direction. In addition, the displacement detection unit, the position detection sensor 180 fixedly coupled to the housing 140, which is a fixed body, is fixedly coupled to the bobbin 110, which is a moving body, for sensing according to the movement of the sensing magnet 190 in a first direction. The current position or the first displacement amount of the bobbin 110 in a separate driver IC or the camera module controller based on the current change output by sensing the change in the magnetic force emitted from the magnet 190, and output based on the detected change in the magnetic force can be calculated or judged. The current position or the first displacement amount of the bobbin 110 calculated or determined by the displacement sensing unit in this way is transmitted to the control unit of the printed circuit board 170, and the control unit recrystallizes the position of the bobbin 110 for auto-focusing, so that the coil ( 120) to adjust the amount of applied current.

In the above, it has been shown 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 deviate 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 should be determined by the following claims.

100: lens driving device
110: bobbin
120: coil
130: magnet for driving
140: housing
150: upper elastic member
160: lower elastic member
170: printed circuit board
180: position sensor
190: magnet for sensing
210: base
300: cover member

Claims (15)

a housing supporting the driving magnet;
a bobbin having a coil disposed inside the driving magnet on an outer circumferential surface and moving in a first direction parallel to the optical axis inside the housing;
an upper elastic member and a lower elastic member connecting the housing and the bobbin and electrically connected to both ends of the coil;
a printed circuit board provided on one side of the housing and including an input terminal part and an output terminal part electrically connected to an external power source; and
and a displacement detecting unit that determines a first displacement value of the bobbin in the first direction, and includes a sensing magnet provided inside the printed circuit board in the bobbin,
The upper elastic member is electrically connected to one terminal part of the input terminal part and the output terminal part, and the lower elastic member is electrically connected to the other terminal part of the input terminal part and the output terminal part. According to claim 1,
The bobbin includes a receiving groove formed in an inner direction to a predetermined depth on an outer circumferential surface of the bobbin to receive the sensing magnet. According to claim 1,
The upper elastic member and the lower elastic member,
an inner frame coupled to one of the upper and lower surfaces of the bobbin;
an outer frame coupled to one of the upper and lower surfaces of the housing;
A lens driving device including a connection part elastically connecting the inner frame and the outer frame. 4. The method of claim 3,
The one terminal part and the other terminal part are provided from the bottom of the printed circuit board toward the outside. 5. The method of claim 4,
The one terminal part is provided at the same height as the upper elastic member on the inner surface of the printed circuit board and is electrically connected to the upper connection terminal part electrically connected to the upper elastic member,
The other terminal part is provided at the same height as the lower elastic member on the inner surface of the printed circuit board and is electrically connected to the lower connection terminal part electrically connected to the lower elastic member. 6. The method of claim 5,
The one terminal part and the upper connection terminal part are electrically connected by one printed circuit among a plurality of printed circuits provided on the printed circuit board,
The other terminal part and the lower connection terminal part are electrically connected to each other by another printed circuit among a plurality of printed circuits provided on the printed circuit board. 4. The method of claim 3,
One end of the both ends of the coil is electrically connected to the inner frame of the lower elastic member,
The other end of both ends of the coil is electrically connected to the inner frame of the upper elastic member. 4. The method of claim 3,
The outer frame of the upper elastic member has a first intermediate terminal portion provided in a horizontal outward direction and electrically connected to the one terminal portion,
The outer frame of the lower elastic member is provided in a horizontal outward direction, the lens driving device having a second intermediate terminal portion electrically connected to the other terminal portion. 9. The method of claim 8,
The first intermediate terminal portion and the second intermediate terminal portion are provided on one side of the outer frame opposite to the inner surface of the printed circuit board. 9. The method of claim 8,
The first intermediate terminal portion is provided at the same height as the upper elastic member on the inner surface of the printed circuit board and is electrically connected to an upper connection terminal portion electrically connected to the one terminal portion,
The second intermediate terminal portion is provided at the same height as the lower elastic member on the inner surface of the printed circuit board and is electrically connected to a lower connection terminal portion electrically connected to the other terminal portion. 9. The method of claim 8,
The first intermediate terminal portion and the second intermediate terminal portion, the lens driving device having a flow path limiting cutout formed by cutting some outer portions of the outer frame from both sides. 9. The method of claim 8,
The housing includes a first avoidance cutout formed to a predetermined depth under the first intermediate terminal on an outer surface opposite to the inner surface of the printed circuit board, and an outer surface opposite to the inner surface of the printed circuit board A lens driving device having a second avoidance cutout formed in an upper portion of the second intermediate terminal portion at a predetermined height. According to claim 1,
The coil is a lens driving device wound in three or six layers on the outer peripheral surface of the bobbin. 3. The method of claim 2,
The displacement sensing unit,
A position detection sensor provided at a position corresponding to the sensing magnet on the inner surface of the printed circuit board provided on one side of the housing and detecting a first displacement value of the sensing magnet in the first direction; A lens drive comprising: 15. The method of claim 14,
A part of the receiving groove is located inside the coil.

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