KR20220088672A - Lens moving unit and camera module including the same - Google Patents

Abstract

The lens driving device of the embodiment includes a bobbin in which at least one lens is installed inside and a first coil is installed on an outer circumferential surface; a first magnet disposed on the periphery of the bobbin to face the first coil; a housing supporting the first magnet; and a first lens driving unit including upper and lower elastic members coupled to the bobbin and the housing, the first lens driving unit moving the bobbin in a first direction parallel to the optical axis by the interaction between the first magnet and the first coil; and a base disposed to be spaced apart from the first lens driving unit by a predetermined interval; a plurality of pairs of support members for movably supporting the housing in second and third directions orthogonal to the first direction with respect to the base; a second coil disposed to face the first magnet; and a second lens driving unit including a circuit board on which the second coil is installed, the second lens driving unit moving the housing in second and third directions by interaction of the first magnet and the second coil, and a plurality of pairs of support members is disposed on a side surface of the housing, each of the plurality of pairs of support members including first and second support members divided from each other and disposed adjacent to each other on the same side of the housing, the first support member being one of the pairs of support members Power is supplied to the first coil through the pair.

Description

Lens moving unit and camera module including the same}

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

Since it is difficult to apply the technology of a voice coil motor (VCM) used in an existing general camera module to a camera module for ultra-small size and low power consumption, research related thereto has been actively conducted.

In the case of a camera module mounted on a small electronic product such as a smartphone, the camera module may frequently be impacted during use, and the camera module may be slightly shaken according to a user's hand shake while shooting. In consideration of such a point, the development of a technology for additionally installing an anti-shake means to a camera module is recently required.

Various methods for preventing hand shake have been studied, and as one of them, there is a technology capable of correcting hand shake by moving an optical module in the x-axis and y-axis corresponding to a plane perpendicular to the optical axis. In the case of this technology, since the optical system is moved and adjusted in a plane perpendicular to the optical axis for image correction, the structure is complicated and not suitable for miniaturization.

In addition, in order to accurately focus the optical module, a separate sensor for sensing the position of the optical module moving along the optical axis is desired, and a method for electrically connecting the sensor to a circuit board is emerging.

The embodiment provides a lens driving device that simplifies the process and allows the focus of the range to be more accurately adjusted with a simple configuration.

A lens driving device according to an embodiment includes: a bobbin having at least one lens installed inside and a first coil installed on an outer circumferential surface; a first magnet disposed on the periphery of the bobbin to face the first coil; a housing supporting the first magnet; and a first lens driving unit comprising upper and lower elastic members coupled to the bobbin and the housing to move the bobbin in a first direction parallel to the optical axis by the interaction between the first magnet and the first coil; and a base disposed to be spaced apart from the first lens driving unit by a predetermined interval. a plurality of pairs of support members for movably supporting the housing in second and third directions orthogonal to the first direction with respect to the base; a second coil disposed to face the first magnet; and a second lens driving unit for moving the housing in the second and third directions by interaction between the first magnet and the second coil, including a circuit board on which the second coil is installed, The plurality of pairs of support members are disposed on a side surface of the housing, and each of the pairs of support members includes first and second support members divided from each other and disposed adjacent to each other on the same side of the housing; Power may be supplied to the first coil through a first pair of support members that is one of the pairs of support members.

The plurality of side surfaces of the housing may include a plurality of first surfaces provided at corners where the plurality of first magnets are installed; and a second surface in which the plurality of first surfaces are connected to each other and formed as a plane having a predetermined depth, on which each of the plurality of pairs of support members is disposed.

The upper elastic member includes first and second upper elastic members divided from each other, and the first and second upper elastic members are connected to the first and second support members of the first pair of support members while facing each other to supply the power to the first coil.

Each of the first and second upper elastic members may include an inner frame coupled to the bobbin; an outer frame coupled to the housing; a frame connection unit connecting the inner frame and the outer frame; and a support member contact portion protruding from the outer frame to face the first or second support member of the first pair of support members.

The first lens driving unit is supported by the housing, the first detection sensor for detecting the position of the bobbin in the first direction; and a second magnet attached to an outer circumferential surface of the bobbin to face the first detection sensor. The second magnet may be disposed between a plurality of the first magnets spaced apart from each other in a circumferential direction of the bobbin. The first detection sensor may be inserted and supported in the housing, or may be supported by being attached to the housing.

The lower elastic member includes first and second lower elastic members divided from each other, and the first pin, which is a part of the plurality of pins of the first detection sensor, includes a second pair of support members that is the other one of the plurality of pairs of support members. A third pair of support members connected to the circuit board through a second pin, which is the other part of the plurality of pins of the first detection sensor, is another one of the first and second lower elastic members and the plurality of pairs of support members may be connected to the circuit board through

Each of the first and second lower elastic members may include an inner frame coupled to the bobbin; an outer frame coupled to the housing; a frame connection unit connecting the inner frame and the outer frame; and at least one sensor contact part protruding from the outer frame to be in contact with the second pin of the first detection sensor and to be in contact with the third pair of support members.

The second pair of support members and the third pair of support members may be disposed to face each other.

The first lens driving unit may further include a magnetic field compensation metal disposed on an outer peripheral surface of the bobbin that is symmetrical to the second magnet with respect to the center of the bobbin.

The first and second support members may have shapes that are symmetrical to each other in a direction perpendicular to the first direction.

Each of the first and second support members includes an upper terminal portion coupled to an upper end of the second surface of the housing; at least one elastically deformable part extending in the longitudinal direction from the upper terminal part and having a shape bent at least once; and a lower terminal part extending from the at least one elastically deformable part and coupled to the base.

In the first pair of supporting members, the upper terminal portion of the first supporting member is electrically connected to the first upper elastic member, and the upper terminal portion of the second supporting member is electrically connected to the second upper elastic member. can

In the second pair of supporting members, the upper terminal portion of the first supporting member is connected to a 1-1 pin that is one of the first pins of the first detection sensor, and the upper terminal portion of the second supporting member is the The first pin may be connected to a second pin, which is another one of the first pins of the first detection sensor.

A 2-1 pin, which is one of the second pins of the first detection sensor, is connected to one side of the first lower elastic member, and a 2-2 pin, which is the other one of the second pins, is the second lower elastic member. It may be connected to one side of the member, and in the third pair of supporting members, the first supporting member may be connected to the other side of the first lower elastic member, and the second supporting member may be connected to the other side of the second lower elastic member.

The circuit board may include a pad part connectable to the lower terminal part of each of the plurality of pairs of support members.

A camera module according to another embodiment includes an image sensor; a printed circuit board on which the image sensor is mounted; and the lens driving device.

Unlike the conventional lens driving device according to the embodiment, since the first and second support members and the first and second upper elastic members that are electrically separated from each other are oppositely connected on the same plane of the housing, the time required for the soldering process is reduced. shortening the manufacturing process time,

By dividing one support member facing each side of the housing into two and dividing the lower elastic member into two, the first detection sensor can be connected to the circuit board using the divided support member and the divided lower elastic member Therefore, since a separate structure for the first detection sensor is not required, the first detection sensor 170 for accurately controlling the position of the bobbin can be added at a low cost,

A value sensed by the added first detection sensor is fed back so that the focus of the lens can be precisely adjusted.

1 is a schematic perspective view of a lens driving device according to an embodiment.
FIG. 2 is an exploded perspective view of the lens driving device illustrated in FIG. 1 .
3 is a perspective view of the lens driving device according to the embodiment in which the cover member illustrated in FIGS. 1 and 2 is removed.
4 is a perspective view showing a bobbin, a first coil, a first magnet, a first detection sensor, and a second magnet are combined in the lens driving device according to the embodiment.
5 is a plan view showing a bobbin, a first magnet, a first detection sensor, a second magnet, and a metal for magnetic field compensation are combined in the lens driving device according to the embodiment.
6 is an exploded perspective view of a housing and a first detection sensor according to an embodiment.
7 is a rear perspective view of a housing according to an embodiment.
8 is a rear perspective view showing a bobbin, a first magnet net, a housing, a lower elastic member, and a plurality of pairs of support members according to an embodiment.
9 is a perspective view of an upper elastic member according to an embodiment.
10 is a perspective view of a lower elastic member according to an embodiment.
11 is a cross-sectional view taken along line II' shown in FIG. 3 .
12 is a partially coupled perspective view of a second coil, a circuit board, and a base according to an embodiment.
13 is an exploded perspective view of a second coil, a circuit board, and a base according to an embodiment.
14 is a front view of each of a plurality of pairs of support members according to an embodiment.
15 is a perspective view of a circuit board according to an embodiment.
FIG. 16 is a perspective view showing only a lower elastic member, a pair of first to fourth support members, and a circuit board according to an embodiment in the lens driving device illustrated in FIG. 3 .

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings to help the understanding of the present invention by giving examples and to explain the present invention in detail. However, embodiments according to the present invention may be modified in various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided in order to more completely explain the present invention to those of ordinary skill in the art.

In the description of the embodiment according to the present invention, in the case where it is described as being formed on "up (above)" or "below (on or under)" of each element, upper (upper) or lower (lower) (on or under) includes both elements in which two elements are in direct contact with each other or one or more other elements are disposed between the two elements indirectly. In addition, when expressed as “up (up)” or “down (on or under)”, the meaning of not only the upward direction but also the downward direction based on one element may be included.

Also, as used hereinafter, relational terms such as “first” and “second,” “top/top/top” and “bottom/bottom/bottom” refer to any physical or logical relationship between such entities or elements or It may be used only to distinguish one entity or element from another, without requiring or implying an order.

In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not fully reflect the actual size.

Hereinafter, a lens driving apparatus according to an embodiment will be described with reference to the accompanying drawings. For convenience of description, the lens driving apparatus according to the embodiment is described using a Cartesian coordinate system (x, y, z), but may be described using other coordinate systems, and the embodiment is not limited thereto. In each figure, the x-axis and y-axis refer to directions perpendicular to the z-axis, which is the optical axis direction, the z-axis direction, which is the optical axis direction, is called a 'first direction', and the x-axis direction is called a 'second direction', and y The axial direction may be referred to as a 'third direction'.

A 'shake correction device' applied to a small camera module of a mobile device such as a smartphone or tablet PC is a device that prevents the outline of the captured image from being clearly formed due to the vibration caused by the user's hand shake when shooting a still image. It may mean a device configured to be able to

In addition, the 'auto-focusing device' is a device for automatically focusing an image of a subject on an image sensor surface. Such an image stabilization device and auto-focusing device can be configured in various ways. The lens driving device according to the embodiment moves the optical module composed of at least one lens in a first direction parallel to the optical axis, or in the first direction A handshake correction operation and/or an auto-focusing operation may be performed by moving the surface formed by the second and third directions perpendicular to the .

1 is a schematic perspective view of a lens driving device according to an embodiment, and FIG. 2 is an exploded perspective view of the lens driving device illustrated in FIG. 1 .

1 and 2 , the lens driving apparatus according to the embodiment may include a first lens driving unit 100 , a second lens driving unit 200 , and a cover member 300 . Here, the first lens driving unit 100 may serve as the above-described auto-focusing device, and the second lens driving unit 200 may function as the above-described hand-shake correction device.

The cover member 300 may be provided in a substantially box shape, and may surround the first and second lens driving units 100 and 200 .

3 is a perspective view of a lens driving device according to an embodiment in which the cover member 300 illustrated in FIGS. 1 and 2 is removed.

The first lens driving unit 100 includes a bobbin 110 , a first coil 120 , a first magnet 130 , a housing 140 , an upper elastic member 150 , and a lower elastic member 160 . may include In addition, the first lens driving unit 100 may further include a first detection sensor 170 and a second magnet 180 , and may further include a metal 182 for magnetic field compensation in addition thereto.

In FIG. 2 , the plurality of pairs of support members 220 are shown as belonging to the first lens driving unit 100 , but the plurality of pairs of support members 220 functionally view the second lens driving unit ( 200) may also belong to The support member pair 220 will be described later in detail when the second lens driving unit 100 is described.

4 is a perspective view in which the bobbin 110, the first coil 120, the first magnet 130, the first detection sensor 170, and the second magnet 180 are combined in the lens driving device according to the embodiment. indicates

5 is a view in which the bobbin 110, the first magnet 130, the first detection sensor 170, the second magnet 180, and the metal 182 for magnetic field compensation are combined in the lens driving device according to the embodiment. Shows a plan view.

Referring to the above drawings, the bobbin 110 may be installed in the inner space of the housing 140 to be reciprocally movable in a direction parallel to the first direction, which is the optical axis direction. The first coil 120 is installed on the outer circumferential surface of the bobbin 110 as illustrated in FIG. 4 , so that the first coil 120 and the first magnet 130 may electromagnetically interact. To this end, the first magnet 130 may be disposed on the periphery of the bobbin 110 to face the first coil 120 .

Also, when the bobbin 110 performs an auto-focusing function by ascending and/or descending in a first direction parallel to the optical axis, it may be elastically supported by the upper and lower elastic members 150 and 160 .

Although not shown, the bobbin 110 may include a lens barrel (not shown) in which at least one lens may be installed on the inner side (ie, inner side) of the bobbin 110 . The lens barrel may be installed inside the bobbin 110 in various ways. For example, a female thread is formed on the inner peripheral surface of the bobbin 110, and a male thread corresponding to the female thread is formed on the outer peripheral surface of the lens barrel. Examples are not limited thereto.

According to another embodiment, the lens barrel may be directly fixed to the inside of the bobbin 110 by a method other than screw coupling, or one or more lenses may be integrally formed with the bobbin 110 without the 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.

6 is an exploded perspective view of the housing 140 and the first detection sensor 170 according to the embodiment, and FIG. 7 is a rear perspective view of the housing 140 according to the embodiment.

The bobbin 110 may include a first stopper 111 and a second stopper (or winding protrusion) 112 .

When the bobbin 110 moves in the first direction parallel to the optical axis in order to perform the auto-focusing function, the first stopper 111 moves beyond a range specified by an external shock, etc., the body of the bobbin 110 It is possible to prevent the upper surface from directly colliding with the inner surface of the cover member 300 shown in FIG. 1 .

Also, referring to FIG. 3 , the first stopper 111 may also serve to guide the installation position of the upper elastic member 150 . According to an embodiment, as shown in FIG. 4 , a plurality of first stoppers 111 may protrude upward to a first height h1, and at least four may protrude in the form of a polygonal pole. .

In addition, as illustrated, the first stopper 111 may be provided in a symmetrical structure with respect to the center of the bobbin 110 , or may be provided in an asymmetrical structure in which interference with other components is excluded as illustrated. In this case, as illustrated in FIG. 6 , the housing 140 may include a first seating groove 146 - 1 formed at a position corresponding to the first stopper 111 .

When the second stopper (or winding protrusion) 112 moves in the first direction, which is a direction parallel to the optical axis, for the auto-focusing function, the bobbin 110 exceeds the specified range due to an external impact. Even if it moves, it is possible to prevent the bottom surface of the body of the bobbin 110 from directly colliding with the top surface of the base 210 and the circuit board 250 . In the case of FIG. 4 , the second stopper 112 is illustrated as including two stoppers 112a and 112b, but the embodiment is not limited to the number of the second stoppers 112 .

According to an embodiment, the second stopper 112 may be formed to protrude from the outer circumferential surface of the bobbin 110 in the circumferential direction. In this case, the housing 140 illustrated in FIG. 6 may include a second seating groove 146 - 2 formed at a position corresponding to the second stopper 112 .

Referring to FIG. 6 , when the contact state between the first stopper 111 and the first bottom surface 146a-1 of the first seating groove 146-1 is configured as an initial position, the auto-focusing function operates in the existing voice It can be controlled like unidirectional control in a VCM (Voice Coil Motor). Alternatively, when the state in which the second stopper 112 and the second bottom surface 146a-2 of the second seating groove 146-2 are in contact with the initial position is configured as the initial position, the auto-focusing function is performed in the existing voice coil motor. It can also be controlled like a one-way control. That is, the auto-focusing function may be implemented through an operation in which the bobbin 110 rises when current is supplied to the first coil 120 and the bobbin 120 falls when the current is turned off.

However, when the position where the first stopper 111 and the first bottom surface 146a-1 of the first seating groove 146-1 are spaced apart by a predetermined distance is configured as the initial position, the auto-focusing function is performed in the conventional voice coil motor. It can be controlled according to the direction of the current like the bidirectional control in . Alternatively, when the position where the second stopper 112 and the second bottom surface 146a-2 of the second seating groove 146-2 are spaced apart by a predetermined distance is configured as the initial position, the auto-focusing function is performed in the conventional voice coil motor. It can also be controlled according to the direction of the current, such as bidirectional control in . That is, the auto-focusing function may be implemented by moving the bobbin 110 in an upward or downward direction parallel to the optical axis. For example, when a forward current is applied, the bobbin 110 may move upward, and when a reverse current is applied, the bobbin 110 may move downward.

The first seating groove 146 - 1 of the housing 140 corresponding to the first stopper 111 may be concave. At this time, the second width w2 of the first seating groove 146-1 shown in FIG. 6 may be formed to have a certain tolerance than the first width w1 of the first stopper 111 shown in FIG. 4 . can For this reason, rotation of the first stopper 111 inside the first seating groove 146 - 1 may be restricted. Then, even if the bobbin 110 receives a force in a rotational direction about the optical axis rather than the optical axis direction, the first stopper 111 may prevent the bobbin 110 from rotating. It goes without saying that the second stopper 112 may perform the role of the first stopper 111 .

8 is a rear perspective view showing the bobbin 110 , the first magnet net 130 , the housing 140 , the lower elastic member 160 , and the plurality of support member pairs 220 are combined.

A plurality of upper support protrusions 113 illustrated in FIGS. 3 and 4 are protruded from the upper surface of the bobbin 110 , and a plurality of lower support protrusions 114 illustrated in FIG. 8 are protruded from the lower surface of the bobbin 110 . may be formed to protrude.

The plurality of upper support protrusions 113 may have a hemispherical shape as illustrated, or may have a cylindrical or prismatic shape, but the embodiment is not limited to the shape of the upper support protrusion 113 .

9 is a perspective view of the upper elastic member 150 according to the embodiment.

Referring to FIG. 9 , according to an embodiment, the upper elastic member 150 may include a first upper elastic member 150a and a second upper elastic member 150b that are electrically divided from each other.

Each of the first and second upper elastic members 150a and 150b includes an inner frame 151 that can be coupled to the bobbin 110 , and an outer frame 152 and an inner frame 151 that can be coupled with the housing 140 . and a frame connection unit 153 connecting the outer frame 152 to each other. The frame connection part 153 may be bent at least once to form a pattern having a predetermined shape. The bobbin 110 may be elastically supported by rising and/or lowering motions in the first direction parallel to the optical axis through a change in the position of the frame connection part 153 and micro-deformation.

After the inner frame 151 and the outer frame 152 are coupled to the bobbin 110 and the housing 140, respectively, as will be described later, a pair of winding protrusions 112 on which both ends of the first coil 120 are wound. ) and a conductive connection such as soldering is performed on the upper surface of the adjacent position, so that the first and second upper elastic members 150a and 150b may receive power having different polarities. In this way, the upper elastic member 150 may be divided into first and second upper elastic members 150a and 150a to receive power of different polarities.

In addition, the first upper elastic member 150a may further include a first support member contact part 150a-1, and the second upper elastic member 150b may further include a second support member contact part 150b-1. have. Each of the first and second support member contact portions 150a - 1 and 150b - 1 may protrude from the outer frame 52 . As illustrated in FIG. 9 , these 150a - 1 and 150b - 1 may protrude in the first direction, which is the optical axis direction, but the embodiment is not limited to the protrusion direction.

On the other hand, referring again to FIGS. 3 and 4 , the plurality of upper support protrusions 113 may couple and fix the inner frame 151 and the bobbin 110 of the upper elastic member 150 illustrated in FIG. 9 . . According to an embodiment, a first through hole 151a may be formed at a position corresponding to the upper support protrusion 113 of the inner frame 151 .

In this case, the upper support protrusion 113 and the first through hole 151a may be fixed by thermal fusion, or may be fixed with an adhesive member such as epoxy.

In addition, the distance between the plurality of upper support protrusions 113 may be appropriately arranged within a range capable of avoiding interference with neighboring components. That is, each of the upper support protrusions 113 may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110 , and their intervals are not constant, but with respect to a specific virtual line passing through the center of the bobbin 110 . It may be arranged to be symmetrical.

The upper elastic member 150 illustrated in FIG. 9 serves as a terminal for applying a current to the first coil 120, so that the first and second upper sides divided as described above are not electrically connected to each other. It may include elastic members 150a and 150b. In order to fix the divided first and second upper elastic members 150a and 150b as described above, a sufficient number of upper support protrusions 113 may be provided. Accordingly, it is possible to prevent incomplete coupling between the first and second upper elastic members 150a and 150b and the bobbin 110 .

10 is a perspective view of the lower elastic member 160 according to the embodiment.

Referring to FIG. 10 , the lower elastic member 160 according to the embodiment may include first and second lower elastic members 160a and 160b.

Each of the first and second lower elastic members 160a and 160b includes an inner frame 161 that can be coupled to the bobbin 110 , an outer frame 162 that can be coupled with the housing 140 , and an inner frame 161 . ) and a frame connecting portion 163 connecting the outer frame 162 may be included. The frame connection part 163 may be bent at least once to form a pattern having a predetermined shape. The bobbin 110 may be elastically supported by a rising and/or lowering operation in a first direction parallel to the optical axis through a change in the position of the frame connection part 163 and a minute deformation.

In addition, the first lower elastic member 160a includes at least one first sensor contact portion 160a-1, 160a-2, and the second lower elastic member 160b includes at least one second sensor contact portion 160b- 1, 160b-2) may be included. In the case of FIG. 10 , two first sensor contact parts 160a-1 and 160a-2 and two second sensor contact parts 160b-1 and 160b-2 are shown, but the embodiment is limited to the number of sensor contact parts. doesn't happen

Each of the first sensor contact portions 160a-1 and 160a-2 and the second sensor contact portions 160b-1 and 160b-2 may have a shape protruding from the outer frame 162 . In the case of FIG. 10 , it is illustrated as protruding from the outer frame 162 in the first direction, but in the embodiment, the first sensor contact parts 160a-1 and 160a-2 and the second sensor contact parts 160b-1 and 160b-2 ) is not limited to each shape.

As described above, since the lower elastic member 160 has a structure divided into two, similarly to the number of the upper support protrusions 113 , the number of the lower support protrusions 114 is sufficiently large to form the lower elastic member 160 . It is possible to prevent the lifting phenomenon that may occur when the is separated.

If the lower elastic member 160 is configured as a single body rather than a divided structure, it is not necessary to form as many lower support protrusions 114 as the upper support protrusions 113 . This is because, with only a small number of lower support protrusions 114 , the lower elastic member 160 can be stably coupled to the bobbin 110 .

However, as in the embodiment, when the lower elastic member 160 is divided into first and second lower elastic members 160a and 160b spaced apart so as not to be electrically connected to each other, the divided first and second lower elastic members In order to fix the members 160a and 160b, a sufficient number of lower support protrusions 114 may be provided. Accordingly, it is possible to prevent incomplete coupling between the first and second lower elastic members 160a and 160b and the bobbin 110 .

Again, referring to FIG. 8 , the lower support protrusion 114 may have a hemispherical shape like the upper support protrusion 113 , but may have a cylindrical shape or a prismatic shape otherwise. However, the embodiment is not limited to the shape of the lower support protrusion 114 . The lower support protrusion 114 may couple and fix the inner frame 161 of the lower elastic member 160 and the bobbin 110 .

In addition, instead of the first and second upper elastic members (150a, 150b), the first and second lower elastic members (160a, 160b) separated from each other insulated from each other for applying a current to the first coil (120) It may also serve as a terminal.

In addition, the reason for dividing the lower elastic member 160 as described above will be described in detail when the supporting member pair 220 is described.

According to an embodiment, a second through hole 161a may be formed at a position corresponding to the lower support protrusion 114 in the inner frame 161 of each of the first and second lower elastic members 160a and 160b. In this case, the lower support protrusion 114 and the second through hole 161a may be fixed by thermal fusion, or may be fixed with an adhesive member such as epoxy.

In addition, a distance between the plurality of lower support protrusions 114 may be appropriately arranged within a range capable of avoiding interference with surrounding components. That is, the lower support protrusions 114 may be arranged at regular intervals symmetrically with respect to the center of the bobbin 110 .

Each of the above-described upper elastic member 150 and lower elastic member 160 may be provided as a leaf spring, but the embodiment is not limited to the material of the upper and lower elastic members 150 and 160 .

Meanwhile, again referring to FIGS. 4 and 5 , the winding protrusion (or the second stopper) 112 may be provided to protrude from the upper outer peripheral surface of the bobbin 110 . Both ends of the first coil 120 may be wound on the winding protrusion 112 , respectively, with a gaze line and a vertical line. The end of the first coil 120 to the upper surface of the upper elastic member 150 from the upper surface of the bobbin 110 adjacent to the winding protrusion 112 may be energized by a conductive connection member such as solder (S). have.

In addition, as illustrated in FIG. 4 , two winding protrusions 112 may be disposed adjacent to each other on one side of the bobbin 110 , and as illustrated in FIG. Pairs may be placed.

In addition, a stopping protrusion 112a-1 is formed at the end of the winding protrusion 112 to prevent the wound first coil 120 from being separated, or to guide the position of the first coil 120 . make it possible As illustrated, the locking protrusion 112a-1 may be formed to have a stepped structure at its end while the width of the winding protrusion 112 protruding from the outer circumferential surface of the bobbin 110 is gradually increased.

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

For example, when assembling the inner frame 161 of the bobbin 110 and the lower elastic member 160 first, and secondly assembling the housing 140 and the outer frame 162 of the lower elastic member 160, The lower support protrusion 114 of the bobbin 110 and the second through-hole 161a coupled thereto and the third through-hole 162a coupled to the lower frame supporting protrusion 145 of the housing 140 may be heat-sealed and fixed. . Third, when the bobbin 110 and the inner frame 151 of the upper elastic member 150 are assembled first, the upper support protrusion 113 of the bobbin 110 and the first through hole 151a coupled thereto are thermally fused. can be fixed. After that, when the outer frame 152 of the housing 140 and the upper elastic member 150 is fixed fourthly, the fourth through hole 152a coupled to the upper frame support protrusion 144 of the housing 140 to be described later. ) can be bonded through the application of an adhesive such as epoxy. However, this assembly sequence may be changed, that is, the first to third assembly processes are thermal fusion, and bonding may be performed during the fourth and final fixing steps. This can be accompanied by deformation such as warping during thermal fusion, and this can be supplemented by bonding in the final stage.

On the other hand, after the first coil 120 is wound on the outer circumferential surface of the bobbin 110 by an operator or a machine, the line of sight and the vertical wire may be wound and fixed around the winding protrusion 112 , respectively. In this case, the position of the end of the first coil 120 wound around the winding protrusion 112 may be changed according to the operator.

The first coil 120 may be provided as a ring-shaped or angled coil block inserted and coupled to the outer circumferential surface of the bobbin 110 , but is not limited thereto. It can also be wound directly. In either case, the gaze and the vertical wire of the first coil 120 may be wound and fixed around the winding protrusion 112 , and other configurations are the same.

The first coil 120 may be formed in an approximately octagonal shape as shown in FIG. 2 . 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 first coil 120 may be provided in a straight line, and a corner portion connecting these surfaces may also be provided in a straight line, but the present invention is not limited thereto and may be formed in a round shape.

In this case, a portion formed in a straight line in the first coil 120 may be formed to be a surface corresponding to the first magnet 130 . Also, a surface of the first magnet 130 corresponding to the first coil 120 may have the same curvature as that of the first coil 120 . That is, if the first coil 120 is a straight line, the corresponding surface of the first magnet 130 may be a straight line. If the first coil 120 is curved, the corresponding surface of the first magnet 130 is curved. can be Also, even if the first coil 120 is curved, the corresponding surface of the first magnet 130 may be a straight line or vice versa.

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

The first coil 120 may be configured to correspond to the first magnet 130 , such that the first magnet 130 is configured as a single body so that the entire surface facing the first coil 120 has the same polarity. When provided, the first coil 120 may also be configured such that a surface corresponding to the first magnet 130 has the same polarity.

Alternatively, when the first magnet 130 is divided into two or four by a plane perpendicular to the optical axis, and the surface facing the first coil 120 is divided into two or more, the first coil 120 is also divided It is also possible to be divided into a number corresponding to the first magnet 130 .

The first magnet 130 may be installed at a position corresponding to the first coil 120 . According to an embodiment, the first magnet 130 may be installed at a corner portion of the housing 140 as shown in FIG. 8 . The shape of the first magnet 130 may be a substantially trapezoidal shape corresponding to the corner portion, and the surface facing the first coil 120 is formed to correspond to the curvature of the corresponding surface of the first coil 120 . can be

The first magnet 130 may be configured as a single body, and in the case of an embodiment, the surface facing the first coil 120 may be arranged such that the N pole 134 and the outer surface become the S pole 132 . . However, the present invention is not limited thereto, and the reverse configuration is also possible.

At least two or more first magnets 130 may be installed, and according to an embodiment, four may be installed. At this time, as illustrated in FIG. 5 , the first magnet 130 may be provided in a substantially trapezoidal shape, or alternatively, may be provided in a triangular shape.

However, the surface facing the first coil 120 may be formed as a straight line, but the present invention is not limited thereto. When the corresponding surface of the first coil 120 is curved, it may be provided as a curved line having a corresponding curvature. . With this configuration, it is possible to maintain a constant distance from the first coil 120 . In the case of an embodiment, one may be installed in each of the four corners of the housing 140 . However, the present invention is not limited thereto, and either one of the first magnet 130 and the first coil 120 may be flat, and the other may be configured as a curved surface, depending on the design. Alternatively, both of the first coil 120 and the first magnet 130 may have curved surfaces, and in this case, the first coil 120 and the first magnet 130 have the same curvature. can be

As illustrated in FIG. 5 , if the plane of the first magnet 130 has a trapezoidal shape, one pair of the plurality of first magnets 130 is disposed parallel to the second direction, and the other pair is parallel to the third direction. can be arranged. According to such an arrangement structure, it may be possible to control the movement of the housing 140 for handshake correction, which will be described later.

The housing 140 may have a polygonal planar shape, and according to an embodiment, may have an octagonal planar shape as illustrated in FIGS. 6 and 7 . Accordingly, the housing 140 may include a plurality of side surfaces. For example, if the planar shape is octagonal, it may include eight sides. The plurality of side surfaces may be divided into a first surface 141 and a second surface 142 .

The first surface 141 may include a surface on which the first magnet 130 is installed, and the second surface 142 may include a surface on which a pair of support members 220 to be described later is disposed. To this end, the second surface 142 may be formed as a plane having a predetermined depth in which a plurality of first surfaces 141 are interconnected.

The first surface 141 may be formed in a corner portion, and according to an embodiment, an area corresponding to the first magnet 130 or larger than that may be formed. Referring to FIG. 7 , the first magnet 130 may be fixed to the magnet seating portion 141a formed on the inner surface of the first surface 141 . The magnet seating portion 141a may be formed in a groove corresponding to the size of the first magnet 130 , and may be disposed to face the first magnet 130 and at least three surfaces, that is, both side surfaces and an upper surface. An opening is formed in the bottom surface of the magnet seating part 141a, that is, the surface facing the second coil 230 to be described later so that the bottom surface of the first magnet 130 directly faces the second coil 230. can

The first magnet 130 may be fixed to the magnet seating portion 141a with an adhesive, but is not limited thereto, and an adhesive member such as a double-sided tape may be used. Alternatively, instead of forming the magnet seating portion 141a as a concave groove as shown in FIG. 7 , a portion of the first magnet 130 may be exposed or formed as a mounting hole into which it can be fitted.

The first surface 141 may be disposed parallel to the side surface of the cover member 300 . Also, the first surface 141 may be formed to have a larger surface than the second surface 142 .

In addition, as shown in FIGS. 6 and 7 , an escape groove 142a having a predetermined depth may be concavely formed on the second surface 142 . The escape groove 142a will be described later in detail when the support member pair 220 is described.

In addition, a plurality of third stoppers 143 may protrude from the upper surface of the housing 140 . The third 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 directly collides with the inner surface of the cover member 300 . it can be prevented In addition, as illustrated in FIG. 3 , the third stopper 143 may also serve as a guide to space the first and second upper elastic members 150a and 150b apart from each other.

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 . The number of the upper frame support protrusions 144 may be greater than the number of the upper support protrusions 113 . This is because the length of the outer frame 152 is longer than the length of the inner frame 151 . At this time, a fourth through hole 152a having a corresponding shape may be formed in the outer frame 152 of the upper elastic member 150 corresponding to the upper frame supporting protrusion 144, and the upper frame supporting protrusion 144 may be formed in the second It may be fixed by adhesive or heat sealing in the 4 through-hole (152a).

In addition, as shown in FIG. 7 , a plurality of lower frame support protrusions 145 to which the outer frame 162 of the lower elastic member 160 is coupled may protrude from the lower side of the housing 140 . In this case, the lower frame support protrusion 145 may be formed in a number greater than the number of the lower support protrusion 114 described above. This is because the length of the outer frame 162 of the lower elastic member 160 is longer than the length of the inner frame 161 .

In the outer frame 162 of the lower elastic member 160 illustrated in FIG. 10 corresponding to the lower frame supporting protrusion 145, a third through hole 162a having a shape corresponding to the lower frame supporting protrusion 145 may be formed. and may be fixed by adhesive or thermal fusion in the third through hole 162a.

Although not shown, a fourth stopper may be additionally disposed below the housing 140 . The fourth stopper may be formed to protrude from the lower surface of the housing 140 . The fourth stopper may prevent the bottom surface of the housing 140 from colliding with the base 210 and/or the circuit board 250 to be described later. In addition, the fourth stopper may maintain a state spaced apart from the base 210 and/or the circuit board 250 by a predetermined distance during an initial state and a normal operation. Through this configuration, the housing 140 is spaced apart from the base 210 at the bottom and the cover member 300 at the top so that the height in the optical axis direction is maintained by a pair of support members 220 to be described later without up-and-down interference. can do. Accordingly, the housing 140 may perform a shifting operation in the second and third directions, which are front, rear, left, and rear directions on a plane perpendicular to the optical axis. These operations will be described again later.

The first lens driving unit 100 according to the embodiment senses the position of the bobbin 110 in the z-axis direction, which is the optical axis direction, and uses the sensed position as a circuit to precisely control the movement of the bobbin 110 . An operation of feeding back to the outside through the substrate 250 may be performed. To this end, the first lens driving unit 100 may further include a first detection sensor 170 and a second magnet 180 .

The first detection sensor 170 may be supported by the housing 140 . To this end, a first detection sensor seating groove 172 may be provided on a side surface of the housing 140 . The first detection sensor 170 may be disposed in the first detection sensor seating groove 172 to detect the degree to which the bobbin 110 moves in the first direction. To this end, the first detection sensor 170 may include a plurality of pins.

A tapered inclined surface (not shown) may be formed on at least one surface of the first detection sensor seating groove 172 so that epoxy injection for assembling the first detection sensor 170 may be performed more smoothly. . In addition, a separate epoxy may not be injected into the first detection sensor seating groove 172 , but the first detection sensor 170 may be fixed by injecting epoxy or the like. 5 and 6 , the position of the first detection sensor seating groove 172 may be disposed on the same line as the second magnet 180 . Accordingly, the center of the second magnet 180 and the center of the first detection sensor 170 may coincide with each other.

For example, the first detection sensor 170 may be inserted and supported in the housing 140 as illustrated in FIG. 6 , and an adhesive member such as epoxy or double-sided tape is used for the housing 140 as illustrated in FIG. 6 , as illustrated. It may be attached and supported.

The first detection sensor 170 may be provided as a Hall sensor, and any sensor capable of detecting a change in magnetic force may be used.

4 and 5 , the second magnet 180 may be attached to the outer peripheral surface of the bobbin 110 to face the first detection sensor 170 . According to an embodiment, the second magnet 180 may be disposed between a plurality of first magnets 130 spaced apart from each other in the circumferential direction of the bobbin. This is to minimize interference between the first magnet 130 and the second magnet 180 . Also, the second magnet 180 may be disposed on the first coil 120 wound around the bobbin 110 , but the embodiment is not limited thereto.

11 is a cross-sectional view taken along the line II' shown in FIG. 3 . For convenience of description, illustration of the housing 140 is omitted.

When the second magnet 180 is disposed, the interaction between the first magnet 130 and the first coil 120 may be hindered by the second magnet 180 . This is because a magnetic field may be induced by the second magnet 180 . Therefore, according to the embodiment, in order to minimize the interference of the interaction between the first magnet 130 and the first coil 120, the first lens driving unit 100 may further include a metal 182 for magnetic field compensation. can

5 and 11 , the magnetic field compensation metal 182 may be disposed at a position symmetrical to the second magnet 180 on the outer peripheral surface of the bobbin 110 . That is, when the metal 182 for magnetic field compensation and the second magnet 180 are located on the same line HL in the y-axis direction, which is the third direction, the interference of the interaction can be minimized.

According to an embodiment, the material of the metal 182 for magnetic field compensation may be a metal. The magnetic field compensation metal 182 may be made of a magnetic material, for example, a magnetic material or a magnet.

In some cases, the first lens driving unit 100 may not include the first detection sensor 170 , the second magnet 180 , and the metal 182 for magnetic field compensation. Alternatively, the first lens driving unit 100 may further include various devices for improving the auto-focusing function of the first lens driving unit 100 in addition to the first detection sensor 170 . In this case, a method or process of receiving power through the arrangement position of the device or the circuit board 250 and supplying a necessary signal to the circuit board 250 may be the same as that of the first detection sensor 170 .

Meanwhile, referring back to FIG. 2 , the second lens driving unit 200 is a lens driving unit for image stabilization as described above, and includes the first lens driving unit 100 , the base 210 , and a pair of support members. ) 220 , a second coil 230 , a second detection sensor 240 , and a circuit board 250 may be included.

The first lens driving unit 100 may have the configuration as described above, but may be replaced with an optical system that implements an auto-focusing function other than the aforementioned configuration. That is, instead of using the voice coil motor type auto-focusing actuator, it may be configured as an optical module using a single lens moving actuator or a refractive index variable actuator. That is, the first lens driving unit 100 may be any optical actuator capable of performing an auto-focusing function. However, the first magnet 130 needs to be installed at a position corresponding to the second coil 230 to be described later.

12 is a partially coupled perspective view of the second coil 230 , the circuit board 250 and the base 210 , and FIG. 13 is an exploded perspective view of the second coil 230 , the circuit board 250 and the base 210 . indicates

First, as illustrated in FIG. 2 , the base 210 of the second lens driving unit 200 may have a substantially rectangular planar shape, and a plurality of pairs of support members 220 may be fixed to a straight surface. When the cover member 300 is adhesively fixed to the base 210 , a step 211 may be formed so that an adhesive may be applied thereto as illustrated in FIGS. 12 and 13 . In this case, the bottom surface of the step 211 may be in surface contact with the end of the cover member 300 .

The base 210 may be disposed to be spaced apart from the first lens driving unit 100 by a predetermined interval. A support groove having a corresponding size may be formed on a surface of the base 210 facing the portion where the terminal 251 is formed of the circuit board 250 . The support groove is formed to be concave inward by a predetermined depth from the outer circumferential surface of the base 210 , so that the terminal surface 253 on which the terminal 251 is formed does not protrude to the outside or the amount of protrusion can be adjusted.

The step 211 may guide the cover member 300 coupled to the upper side, and may be coupled so that an end of the cover member 300 is in surface contact. The step 211 and the end of the cover member 300 may be adhesively fixed and sealed by an adhesive or the like.

A support member seating groove 214 into which a plurality of pairs of support members 220 can be inserted may be concavely formed in an upper surface of the base 210 . An adhesive may be applied to the support member seating groove 214 to fix the plurality of pairs of support members 220 so that they do not move. The ends of the plurality of support member pairs 220 may be inserted or disposed in the support member seating groove 214 to be fixed through an adhesive or the like. A plurality or at least one of the support member seating grooves 214 may be respectively formed on a straight surface on which a plurality of pairs of support members 220 are installed, and the shape of the support member seating groove 214 is approximately square. It can be provided as a home.

In addition, as shown in FIG. 13 , two support member seating grooves 214 may be provided for each straight surface in the embodiment, which may increase or decrease depending on the shape of the plurality of support member pairs 220 , and one may be formed, or three or more may be formed. In the embodiment, two support member seating grooves 214 for each straight surface so that the ends of each of the first and second support members of the plurality of pairs of support members 220 can be inserted or disposed in the support member seating groove 214 . is formed.

In addition, a second detection sensor seating groove 215 in which the second detection sensor 240 can be disposed may be provided on the upper surface of the base 210 . According to the embodiment, a total of two second detection sensor seating grooves 215 are provided, so that the second detection sensor 240 is disposed in the second detection sensor seating groove 215 so that the housing 140 is provided with the above-described second detection sensor seating groove 215 . direction and the degree of movement in the third direction may be detected. To this end, two second detection sensor seating grooves 215 may be disposed such that an angle formed by virtual lines connecting the second detection sensor seating groove 215 and the center of the base 210 is 90 degrees.

A tapered inclined surface (not shown) may be formed on at least one surface of the second sensor seating groove 215 . Epoxy injection for assembling the second detection sensor 240 may be configured to be performed more smoothly. In addition, a separate epoxy may not be injected into the second detection sensor seating groove 215 , but epoxy may be injected to fix the second detection sensor 240 . The location of the second detection sensor seating groove 215 may be disposed at or near the center of the second coil 230 . Alternatively, the center of the second coil 230 may coincide with the center of the second detection sensor 240 . According to an embodiment, it is preferable that the second detection sensor seating groove 215 is installed at a corner portion of the base 210 . This is to minimize interference with the plurality of pairs of support members 220 .

The second detection sensor 240 may be disposed on the center side of the second coil 230 with the circuit board 250 interposed therebetween. That is, the second detection sensor 240 is not directly connected to the second coil 230 , and the second coil 230 is on the upper surface of the circuit board 250 , and the second detection sensor ( ) is on the lower surface of the circuit board 250 . 240) may be installed. According to an embodiment, the second detection sensor 240 , the second coil 230 , and the first magnet 130 may be disposed on the same axis.

According to this configuration, the second coil 230 moves the housing 140 in the second and/or third direction through interaction with the first magnet 130 to perform handshake correction.

A groove portion is formed at a position corresponding to the step 211 of the cover member 300 , and an adhesive or the like may be injected through the groove portion. At this time, the injected adhesive is set to have a low viscosity, so that the adhesive injected through the groove may permeate into the surface contact position of the step 211 and the end of the cover member 300 . As described above, the adhesive member applied to the groove fills a gap between the opposing surfaces of the cover member 300 and the base 210 through the groove, so that the cover member 300 is coupled to the base 210 while It may be configured to be sealed.

In addition, a seating portion (not shown) in which a filter is installed may be formed on the lower surface of the base 210 . Such a filter may be an infrared cut filter. However, the present invention is not limited thereto, and a filter may be disposed in a separate sensor holder under the base 210 . In addition, as will be described later, a sensor board on which an image sensor is mounted may be coupled to a lower surface of the base 210 to constitute a camera module.

The plurality of pairs of support members 220 may be respectively disposed on a plurality of side surfaces of the housing 140 . In the embodiment, each of the plurality of pairs of support members 220 is described as including two first and second support members, but each of the pairs of support members 220 may include three or more support members.

For example, as described above, when the housing 140 has a polygonal planar shape, the number of side surfaces of the housing 140 is plural. If the housing 140 has an octagonal planar shape as illustrated in FIGS. 6 and 7 , the plurality of support member pairs 220 may be disposed on a corresponding side of the octagonal side surfaces. Alternatively, when the housing 140 has a quadrangular planar shape, the plurality of pairs of support members 220 may be respectively disposed on four side surfaces.

Hereinafter, it is assumed that the number of the plurality of pairs of support members 220 is four as illustrated in FIGS. 2, 3, and 8 , but the number of pairs of support members 220 may be three. That is, it will be described that the first to fourth pairs of support members 220 - 1 , 220 - 2 , 220 - 3 and 220 - 4 are respectively disposed on the four second surfaces 142 of the housing 140 .

14 is a front view of each of the plurality of support member pairs 220 according to the embodiment.

The first to fourth pairs of support members 220 : 220 - 1 , 220 - 2 , 220 - 3 and 220 - 4 are respectively disposed on four second surfaces 142 of the eight sides of the housing 140 . Thus, the housing 140 can be supported by being spaced apart from the base 210 by a predetermined distance. Since each of the first to fourth support member pairs 220:220-1, 220-2, 220-3, 220-4 according to the embodiment is disposed on the second surface 142 of the housing, a total of four supports A pair of members may be installed symmetrically to each other. However, the present invention is not limited thereto, and may be composed of eight pairs of two for each straight surface.

Each of the first to fourth pairs of support members 220 : 220 - 1 , 220 - 2 , 220 - 3 and 220 - 4 may include first and second support members 220a and 220b divided from each other. That is, the first pair of support members 220 - 1 includes a first support member 220a - 1 and a second support member 220b - 1 , and the second pair of support members 220 - 2 includes the first support member 220a - 1 a member 220a-2 and a second support member 220b-2, wherein the third pair of support members 220-3 is a first support member 220a-3 and a second support member 220b-3 and the fourth support member pair 220 - 4 may include a first support member 220a - 4 and a second support member 220b - 4 . Here, the first support member and the second support member may be installed adjacent to each other on the same side of the housing 140 .

Each of the first support members 220a-1, 220a-2, 220a-3, 220a-4 and the second support members 220b-1, 220b-2, 220b-3, and 220b-4 has an upper terminal part 221 . , at least one elastically deformable part 222 , 223 , 225 and a lower terminal part 224 may be included. In addition, the first and second support members illustrated in FIG. 14 may have shapes that are symmetrical to each other in a direction perpendicular to the first direction, ie, the z-axis direction (eg, in the x-axis or y-axis direction. If, in FIG. 14 , When the illustrated support member pair 220 corresponds to the first or fourth support member pair 220-1, 220-4 illustrated in FIGS. 3 and 8 , the first and second support member pairs in the z-axis direction may be symmetrical in the y-axis direction perpendicular to the and the second support member may be symmetrical in an x-axis direction perpendicular to the z-axis direction.

The bottom surface of the escape groove 142a of the housing 140 illustrated in FIGS. 6 and 7 forms an open opening, so that the lower terminal portion 224 of the support member pair 220 interferes with the housing 140 it can be prevented In addition, the upper side of the escape groove 142a may form a stepped portion 142b as illustrated in FIG. 7 to support the inside of the upper terminal portion 221 of the support member pair 220 .

3 and 14 , the upper terminal part 221 is coupled to the upper end of the second surface 142 of the housing 140 , and corresponds to the coupling protrusion 147 protruding from the second surface 142 . A concave groove portion 147a may be formed at a position to be fixed and fixed by fitting them. The upper terminal part 221 is a part that can be electrically connected to the upper elastic member 150 .

According to an embodiment, the first and second support member contact portions 150a-1 and 150b-1 of the first and second upper elastic members 150a and 150b illustrated in FIG. 9 are the first support member pair 220- The first and second support members 220a-1 and 220b-1 of 1) may be disposed to face each other so as to be electrically connected to the upper terminal parts 221 of each. Here, the first pair of support members is a support member assigned a role to supply power to the first coil 120 among the first to fourth pairs of support members 220-1, 220-2, 220-3, and 2204. means a pair. Accordingly, as the first and second support members 220a-1 and 220b-1 are disposed adjacent to each other on the same side of the housing 140, the first and second upper elastic members 150a and 150b The second support member contact portions 150a - 1 and 150b - 1 may also be disposed adjacent to each other.

Referring to FIG. 3 , in the first pair of supporting members 220 - 1 , the upper terminal portion 221 of the first supporting member 220a - 1 and the first supporting member contacting portion 150a - 1 are connected to a first contact point CP1 . may be electrically connected to each other through soldering or the like. In the first supporting member pair 220-1, the upper terminal portion 221 of the second supporting member 220b-1 and the second supporting member contacting part 150b-1 are connected to each other through soldering or the like at the second contact point CP2. may be electrically connected. That is, in the first pair of supporting members 220-1, the upper terminal portion 221 of the first supporting member 220a-1 is electrically connected to the first upper elastic member 150a, and the second supporting member 220b The upper terminal part 221 of -1) may be electrically connected to the second upper elastic member 150b. By this configuration, the first and second upper elastic members 150a and 150b divided into two are the first and second support members 220a-1 and 220b-1 of the first pair of support members 220-1. ) and may be electrically connected to each other to apply power (or current) received from the circuit board 250 to the first coil 120 .

In addition, the upper terminal portion 221 of the first and second support members illustrated in FIG. 14 may include a first contact terminal portion 221a for supplying power to the first and second upper elastic members 150a and 150b. have. Here, the first contact terminal part 221a may be disposed at an upper edge of the upper terminal part 221 . However, the first contact terminal part 221a may be provided separately from the upper terminal part 221 . The first contact terminal portion 221a of each of the first and second support members may receive positive (+) pole or negative (−) pole power.

In addition, the upper terminal portion 221 of the first and second support members may further include a second contact terminal portion 221b for connecting the first detection sensor 170 and the circuit board 250 . Here, the second contact terminal part 221b may be disposed at the lower edge of the upper terminal part 221 . However, the second contact terminal part 221a may be provided separately from the upper terminal part 221 .

The at least one elastically deformable part 222 , 223 , and 225 may extend in the longitudinal direction from the upper terminal part 221 and may be bent at least once to form a predetermined pattern. Here, the longitudinal direction may be a direction in which the upper terminal part 221 and the lower terminal part 224 are connected to each other.

According to an embodiment, the at least one elastically deformable part may include the first and/or second elastically deformable parts 222 and 223 .

When the first elastically deformable part 222 is provided in a zigzag shape through bending twice or more, the second elastically deformable part 223 may also be formed to correspond thereto, but is not limited thereto. According to another embodiment, the second elastically deformable part 223 may be omitted or provided in a shape different from that of the first elastically deformable part 222 . 14 is only one embodiment, and in addition, it is possible to configure it to have various patterns such as a zigzag shape. In this case, the first and second elastically deformable parts 222 and 223 may be configured as one without distinguishing, or it may be configured only in the form of a suspension wire without such a pattern. According to an embodiment, the linear portions of the first and second elastic deformation parts 222 and 223 may be formed to be substantially parallel to a plane perpendicular to the optical axis.

The first and second elastically deformable portions 222 and 223 are formed in the direction in which the housing 140 moves or the length of the pair of support members when the housing 140 moves in the second and/or third directions, which are planes perpendicular to the optical axis. It can be elastically deformed slightly in the direction. Then, the housing 140 can move in the second and third directions that are substantially perpendicular to the optical axis without a change in position with respect to the first direction, which is a direction parallel to the optical axis, thereby increasing the accuracy of handshake correction. This utilizes the characteristic that the elastically deformable parts 222 and 223 can be stretched in the longitudinal direction.

In addition, the at least one elastically deformable part may further include a connection part 225 . The connection part 225 may be disposed in the middle of the first and second elastically deformable parts 222 and 223 , but is not limited thereto, and may be disposed in connection with one elastically deformable part. The first and second elastically deformable portions 222 and 223 may be formed with the connecting portion 225 interposed therebetween, or may be provided in a shape corresponding to each other.

The connection part 225 may be provided in a plate shape to perform a damping role, and a plurality of holes (not shown) or grooves (not shown) are formed in the connection part 225 to connect the connection part 225 through the holes or grooves. and the housing 140 may be configured as a damping unit using a UV damper or the like.

In the embodiment, the first and second elastically deformable parts 222 and 223 are illustrated as being disposed between the upper terminal part 221 and the lower terminal part 224, but the embodiment is not limited thereto. According to another embodiment, unlike illustrated in FIG. 14 , one or more elastically deformable parts may be included at both ends of each of the first and second support members.

The lower terminal part 224 may be provided at an end of each of the first and second support members illustrated in FIG. 14 , and may extend from at least one elastically deformable part 222 , 223 , and 225 to be coupled to the base 210 . . One end 224a of the lower terminal part 224 may be inserted or disposed in the support member seating groove 214 formed in the base 210 to be fixedly coupled by an adhesive member such as epoxy. However, the present invention is not limited thereto, and the support member seating groove 214 may correspond to the lower terminal part 224 to fit and couple them. Alternatively, one end 224a of the lower terminal part 224 may be formed to be branched into two or more shapes. Correspondingly, the base 210 has two or more support member seating grooves 214 per one support member. may be formed.

In addition, the other end 224b of the lower terminal part 224 may be seated and connected to the top of each pad of the pad parts 252-1, 252-2, 252-3, and 252-4 of the circuit board 250 .

The lower terminal part 224 may be provided in a plate shape wider than the width of the first and second elastically deformable parts 222 and 223, but is not limited thereto, and may have a narrow or corresponding width.

Meanwhile, the second coil 230 may be disposed to face the first magnet 130 fixed to the housing 140 . For example, the second coil 230 may be disposed outside the first magnet 130 . Alternatively, the second coil 230 may be installed to be spaced apart from the lower side of the first magnet 130 by a predetermined distance.

According to an embodiment, as illustrated in FIGS. 12 and 13 , a total of four second coils 230 may be installed at the four corners of the circuit board 250 , but the present invention is not limited thereto. It is also possible that only two, such as one, and one for the third direction, are installed, or four or more may be installed. In the case of an embodiment, a circuit pattern is formed in the shape of a second coil 230 on the circuit board 250, and an additionally separate second coil 230 may be disposed on the circuit board 250, but is not limited thereto. Only a separate second coil 230 may be disposed on the circuit board 250 without forming a circuit pattern in the shape of the second coil 230 on the circuit board 250 . Alternatively, the second coil 230 may be configured by winding a wire in a donut shape, or the second coil 230 may be formed in an FP coil shape and electrically connected to the circuit board 250 .

The circuit member 231 including the second coil 230 may be installed on the upper surface of the circuit board 250 disposed above the base 210 . However, the present invention is not limited thereto, and the second coil 230 may be disposed in close contact with the base 210 , may be disposed spaced apart from the base 210 , may be formed on a separate substrate, and may be laminated and connected to the circuit board 250 . have.

The housing 140 may be moved in the second and third directions by the interaction between the first magnet 130 and the second coil 230 implemented as described above. To this end, the above-described first to fourth pairs of support members 220 - 1 , 220 - 2 , 220 - 3 , and 220 - 4 include a second orthogonal to the housing 140 in the first direction with respect to the base 210 . and movably supported in a third direction.

Meanwhile, the second detection sensor 240 is disposed at the center of the second coil 230 to detect the movement of the housing 140 . The second detection sensor 240 may be provided as a Hall sensor, and any sensor capable of detecting a change in magnetic force may be used. As shown in FIG. 13 , a total of two second detection sensors 240 may be installed at the corners of the base 210 disposed on the lower side of the circuit board 250 , and the mounted second detection sensors 240 . ) may be inserted into the second detection sensor seating groove 215 formed in the base 210 . The lower surface of the circuit board 240 may be opposite to the surface on which the second coil 230 is disposed.

15 is a perspective view of a circuit board 250 according to an embodiment.

13 and 15 , the circuit board 250 may include a plurality of pad parts 252-1, 252-2, 252-3, and 252-4. The plurality of pad parts 252-1, 252-2, 252-3, and 252-4 have the lower terminal part 224 of each of the plurality of support member pairs 220-1, 220-2, 220-3, and 220-4. ) may have a form connectable to the other end (224b). That is, the other end 224b of the lower terminal part 224 of the first and second support members 220a-1 and 220b-1 of the first support member pair 220-1 is the first pad part 252-1. ) respectively connected to the pads, and the other end 224b of the lower terminal part 224 of the first and second support members 220a-2 and 220b-2 of the second support member pair 220-2 is 2 of the lower terminal part 224 of the first and second support members 220a-3 and 220b-3 of the third pair of support members 220-3, respectively connected to the pads of the pad part 252-2. The other end 224b is respectively connected to the pads of the third pad part 252 - 3 , and the first and second support members 220a - 4 and 220b - 4 of the fourth pair of support members 220 - 4 . The other end 224b of the lower terminal part 224 may be connected to the pads of the fourth pad part 252-4, respectively. Each of the first to fourth pad parts 252-1, 252-2, 252-3, and 252-4 includes two pads, and may be respectively connected to the first and second support members of the corresponding pair of support members.

The circuit board 250 may further include a plurality of terminals 251 electrically connected to the pad parts 252-1, 252-2, 252-3, and 252-4 described above.

The circuit board 250 is coupled to the upper surface of the base 210 , and a fifth through hole 255 may be formed at a position corresponding to the support member seating groove 214 to be exposed. A bent terminal surface 233 may be formed on the circuit board 250 . According to an embodiment, at least one terminal 251 may be installed on one bent terminal surface 253 of the circuit board 250 .

According to an embodiment, external power may be applied through a plurality of terminals 251 installed on the terminal surface 253 to supply power to the first and second coils 120 and 230 and the first detection sensor 170 , , a signal from the first detection sensor 170 may be output to the outside as a feedback signal necessary to control the position of the bobbin 110 .

The number of terminals formed on the terminal surface 253 on which the terminals 251 are installed may be increased or decreased according to the types of components that need to be controlled.

According to an embodiment, the circuit board 250 may be provided as an FPCB, but is not limited thereto, and the terminal configuration of the circuit board 250 is directly formed on the surface of the base 210 using a surface electrode method, etc. It is also possible

Hereinafter, in the lens driving device having the above-described configuration, power is supplied to the first detection sensor 170 using a plurality of pairs of support members 220 and a sensing signal output from the first detection sensor 170 is circuited. The process of transferring to the substrate 250 will be exemplarily described as follows with reference to the accompanying drawings.

When the first detection sensor 170 is implemented as a Hall sensor, the Hall sensor 170 may have a plurality of pins. For example, the plurality of pins may include first and second pins. The first pin may include pins 1-1 and 1-2 respectively connected to voltage and ground, and the second pin may include pins 2-1 and 2-2 outputting the sensed result. can Here, the sensed result output through the 2-1 and 2-2 pins may be in the form of a current, but the embodiment is not limited to the form of a signal.

According to an embodiment, power may be supplied from the circuit board 250 to the 1-1 and 1-2 pins of the first detection sensor 170 using the second pair of supporting substrates 220 - 2 , The sensed result may be transmitted from the 2-1 and 2-2 pins of the first detection sensor 170 to the circuit board 250 using the three supporting substrate pairs 220 - 3 . Here, the second support substrate pair refers to any support other than the first support substrate pair 220-1 among the first to fourth support substrate pairs 220-1, 220-2, 220-3, and 220-4. means a pair of substrates. In addition, the third supporting substrate pair refers to any supporting substrate other than the first and second supporting substrate pairs among the first to fourth supporting substrate pairs 220-1, 220-2, 220-3, and 220-4. means a pair.

16 is a view showing the lower elastic member 160, the first to fourth supporting member pairs 220-1, 220-2, 220-3, 220-4, and the circuit board 250 in the lens driving device illustrated in FIG. 3 . A perspective view of the bay is shown.

Pins 1-1 and 1-2 of the first detection sensor 170 may be connected to the circuit board 250 through a second pair of support members 220 - 2 .

To this end, the second contact terminal portion 221b of the upper terminal portion 221 of each of the first and second support members illustrated in FIG. 14 may be used. However, the embodiment is not limited thereto, and the upper terminal part 221 may be connected to the 1-1 and 1-2 pins in a different form from the second contact terminal part 221b.

In other words, as illustrated in FIG. 3 , the second contact terminal portion 221b of the upper terminal portion 221 of the first support substrate 220a - 2 of the second support member pair 220 - 2 is 1-1 The second contact terminal portion 221b of the upper terminal portion 221 of the second support member 220b-2 of the second support member pair 220-2 is electrically connected to the pin at the third contact point CP3. It may be electrically connected to the 1-2 pin and the fourth contact CP4. In addition, the lower terminal portion 224 of the first and second support substrates 220a - 2 and 220b - 2 of the second support member pair 220 - 2 is the second pad portion 252 - 2 of the circuit board 250 . ) and the seventh and eighth contact points CP7 and CP8, respectively.

Due to the above connection, the 1-1 and 1-2 pins of the first detection sensor 170 are connected to the first and second support substrates 220a-2 and 220b- of the second support member pair 220-2. It can be seen that through 2) it can be connected to the circuit board 250 . Referring to FIG. 16 , conduction paths from pins 1-1 and 1-2 of the first detection sensor 170 to the second pad part 252-2 of the circuit board 250 are P1 and P2, respectively. is shown.

In addition, the 2-1 and 2-2 pins of the first detection sensor 170 are circuits through the third support member pair 220-3 via the first and second lower elastic members 160a and 160b. It may be connected to the substrate 250 .

To this end, referring to FIG. 3 , the 2-1 pin is electrically connected to the end of the 1-1 sensor contact part 160a-1 which is one side of the first lower elastic member 160a at the fifth contact point CP5. and the second pin 2-2 may be electrically connected to an end of the second sensor contact unit 160b-1, which is one side of the second lower elastic member 160b, at the sixth contact point CP6.

In addition, referring to FIGS. 3, 8, and 16 , the 1-1 sensor contact part 160a-1, which is one side of the first lower elastic member 160a, includes the outer frame 162 and the first lower elastic member 160a. ) of the second contact terminal portion 221b of the first support member 220a-3 of the third support member pair 220-3 and the ninth contact point ( CP9) can be connected. In addition, the second-first sensor contact portion 160b-1, which is one side of the second lower elastic member 160b, has the outer frame 162 and the second second contact terminal portion 160b, which is the other side of the second lower elastic member 160b. The second contact terminal portion 221b of the second support member 220b - 3 of the third pair of support members 220 - 3 may be connected at the tenth contact point CP10 through -2).

The lower terminal portion 224 extending from the second contact terminal portion 221b of the first and second support members 220a-3 and 220b-3 of the third support member pair 220-3 is the It is connected to the pads of the third pad unit 252 - 3 . Accordingly, the 2-1 and 2-2 pins of the first detection sensor 170 may be connected to the circuit board 250 through the third support member pair 220-3 via the lower elastic member 160 . It can be seen that there is Referring to FIG. 16 , conduction paths from pins 2-1 and 2-2 of the first detection sensor 170 to the third pad unit 252-3 of the circuit board 250 are P3 and P4, respectively. is shown.

According to the embodiment, the second support member pair 220-2 and the 2-1 and second pins connecting the 1-1 and 1-2 pins of the first detection sensor 170 to the circuit board 250 are connected. The third pair of support members 220 - 3 connecting the −2 pin to the circuit board 250 may be symmetrical to each other in the y-axis direction. To this end, the second pair of support members 220 - 2 and the third pair of support members 220 - 3 may be respectively disposed on opposite sides of the housing 140 .

If the number of support substrates in the lens driving device is 4 in total, and power is supplied to the first coil 120 using two of them, the number of pads required for the circuit board 250 is two. it's just However, according to the embodiment, the total number of support substrates is eight, two support substrates among them are used to supply power to the first coil 120 , and four support substrates among the remaining six support substrates are the first Since it is used to connect the four pins of the detection sensor 170 and the circuit board 250 , the number of pads required on the circuit board 250 may be six. As described above, according to the embodiment, since the number of support substrates is increased, the number of pads required for the circuit board 250 may also increase, and the number of terminals 251 may also increase.

If the number of support substrates is 4 and the number of terminals 251 in the circuit board 250 is 14, the number of terminals 251 in the circuit board 250 according to the embodiment is 18 to 20. However, the embodiment is not limited to the number of terminals 251 .

In the lens driving device according to the embodiment, each of the first to fourth support member pairs 220-1, 220-2, 220-3, 220-4 may include first and second support members electrically divided from each other. can In this case, power may be supplied to the first coil 120 using the first pair of support members 220 - 1 , and the first and second support members 220a - 1 of the pair of first support members 220 - 1 . , 220b-1), the upper terminal portions 221 are disposed adjacent to each other on the same side of the housing 140 . And, the upper terminal portion 221 of the first support member 220a-1 is disposed to face the first support member contact portion 150a-1 of the first upper elastic member 150a, and the second support member 220b- The upper terminal part 221 of 1) is disposed to face the second support member contact part 150b - 1 of the second upper elastic member 150b. Accordingly, the first pair of support members 220 - 1 and the upper contact member 150 may be electrically connected to each other by soldering on one side of the housing 140 , so that the first and second support member contact portions 150a - 1 , 150b-1) can be made much simpler than when the bobbin 110 is symmetrically positioned to face each other by 180°.

In addition, in order to accurately control the position of the bobbin 110 , when the lens driving device additionally includes the first detection sensor 170 , a separate member for the added first detection sensor 170 is not required. Because, the first detection sensor 170 usually has four pins, using the supporting member pair 220 and the lower elastic member 160 used for handshake correction without using a separate member or line, four This is because the pins and the circuit board 250 can be connected. Accordingly, the manufacturing cost of the lens driving device according to the embodiment may be low and the structure may be simple. This may also be applied to a case where other devices for assisting the operation of the lens driving apparatus are additionally disposed in addition to the first detection sensor 170 .

Meanwhile, the lens driving apparatus according to the above-described embodiment may be used in various fields, for example, a camera module. For example, the camera module may be applied to a mobile device such as a mobile phone.

The camera module according to the embodiment may include a lens barrel coupled to the bobbin 110 , an image sensor (not shown), a circuit board 250 , and an optical system.

The lens barrel is the same as described above, and the circuit board 250 may form the bottom surface of the camera module from the portion where the image sensor is mounted.

In addition, the optical system may include at least one or more lenses that transmit an image to the image sensor. In this case, an actuator module capable of performing an auto-focusing function and a hand-shake correction function may be installed in the optical system. The actuator module performing the auto-focusing function may be configured in various ways, and a voice coil unit motor is generally used. The lens driving apparatus according to the above-described embodiment may serve as an actuator module that performs both an auto-focusing function and a hand-shake correction function.

In addition, the camera module may further include an infrared cut filter (not shown). The infrared cut filter serves to block light in the infrared region from being incident on the image sensor. In this case, in the base 210 illustrated in FIG. 2 , an infrared cut filter may be installed at a position corresponding to the image sensor, and may be coupled to a holder member (not shown). In addition, the base 210 may support the lower side of the holder member.

A separate terminal member may be installed on the base 210 to conduct electricity with the circuit board 250 , and it is also possible to integrally form the terminal using a surface electrode or the like. Meanwhile, the base 210 may function as a sensor holder to protect the image sensor, and in this case, a protrusion may be formed in a downward direction along the side surface of the base 210 . However, this is not an essential configuration, and although not shown, a separate sensor holder may be disposed under the base 210 to perform its role.

According to the above configuration, since the auto-focusing operation and the hand-shake correction operation of the first and second lens driving units 100 and 200 can be implemented by sharing the first magnet 130, the number of parts can be reduced, Responsiveness may be improved by reducing the weight of the housing 140 . Of course, the first magnet for auto-focusing and the first magnet for image stabilization may be separately configured.

In the above, the embodiment has been mainly described, but this is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are not exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

100: first lens driving unit 200: second lens driving unit
110: bobbin (bobbin) 112a-1: jamming jaw
120: first coil 130: first magnet
140: housing 141a: magnet seating portion
142a: escape groove 142b: step part
144: upper frame supporting protrusion 145: lower frame supporting protrusion
147: coupling protrusion 150: upper elastic member
150a-1: first support member contact portion 150b-1: second support member contact portion
151a: first through hole 152a: fourth through hole
160: lower elastic member 160a-1, 160a-2: first sensor contact portion
160b-1, 160b-2: second sensor contact portion 161a: second through hole
162a: third through hole 170: first detection sensor
172: first detection sensor seating groove 180: second magnet
182: metal for magnetic field compensation 210: base
211: step 214: support member seating groove
215: second detection sensor seating groove 220: a plurality of support member pairs
220a-1, 220a-2, 220a-3, 220a-4: first support member
220b-1, 220b-2, 220b-3, 220b-4: second support member
221: upper terminal portion 221a: first contact terminal portion
221b: second contact terminal part 222, 223, 225: elastically deformable part
224: lower terminal portion 230: second coil
240: second detection sensor 250: circuit board
251: terminal 253: terminal plane
255: fifth through hole 300: cover member

Claims (1)

a first lens driving unit for moving the bobbin in a first direction parallel to the optical axis by the interaction between the first magnet and the first coil; and
and a second lens driving unit configured to move the housing in second and third directions by interaction between the first magnet and the second coil.

Images