KR20160057722A - Lens driving unit and camera module including the same - Google Patents

Abstract

One embodiment of the lens driving device includes: a bobbin having a first coil on an outer circumferential surface thereof; A first magnet facing the first coil; A housing for supporting the first magnet; Upper and lower elastic members coupled to the bobbin and the housing; A base disposed at a predetermined distance from the housing; A second coil disposed opposite to the first magnet; A circuit board on which the second coil is mounted; A plurality of support members movably supporting the housing in the second and third directions with respect to the base and connecting at least one of the upper or lower elastic members to the circuit board; And an energizing member for electrically connecting the upper and lower elastic members.

Description

[0001] The present invention relates to a lens driving apparatus and a camera module including the lens driving unit,

An embodiment relates to a lens driving apparatus and a camera module including the lens driving apparatus.

The contents described in this section merely provide background information on the embodiment and do not constitute the prior art.

It is difficult to apply the technology of a voice coil motor (VCM) used in a conventional camera module to a camera module for ultra small size and low power consumption, and related research has been actively conducted.

In the case of a camera module mounted on a small electronic device such as a smart phone, the camera module may be frequently hit during use, and the camera module may be slightly shaken due to user's hand motion during shooting. In view of this, in recent years, there has been a demand for development of a technique for additionally providing the camera shake correction means to the camera module.

Various shake prevention means have been studied, and it is necessary to reduce the driving force at the time of camera shake correction, and to improve the durability of the lens driving device and the camera module.

Therefore, it is an object of the present invention to provide a lens driving device capable of reducing a driving force at the time of camera-shake correction and having improved durability, and a camera module including the same.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

One embodiment of the lens driving device includes: a bobbin having a first coil on an outer circumferential surface thereof; A first magnet facing the first coil; A housing for supporting the first magnet; Upper and lower elastic members coupled to the bobbin and the housing; A base disposed at a predetermined distance from the housing; A second coil disposed opposite to the first magnet; A circuit board on which the second coil is mounted; A plurality of support members movably supporting the housing in the second and third directions with respect to the base and connecting at least one of the upper or lower elastic members to the circuit board; And an energizing member for electrically connecting the upper and lower elastic members.

The upper elastic member may include at least four first to fourth upper elastic members, and the energizing member may include at least two of the upper elastic members so as to be electrically connected to at least two of the upper elastic members. have.

Each of the first to fourth upper elastic members has a first inner frame coupled with the bobbin; A first outer frame coupled to the housing and connected to the support member; And a first frame connecting portion connecting the first inner frame and the first outer frame.

The lower elastic member may include at least two first and second lower elastic members separated from each other, and the at least two energizing members may be connected to the first and second lower elastic members.

And the first coil may be connected to the plurality of support members via the first and second lower elastic members.

Each of the first and second lower elastic members includes at least one second inner frame coupled with the bobbin; At least one second outer frame coupled with the housing; And a second frame connection portion connecting the at least one second inner frame and the at least one second outer frame.

Wherein the at least one second outer frame includes a plurality of second outer frames and each of the first and second lower elastic members further comprises a second 2-frame connection portion connecting the plurality of second outer frames Lt; / RTI >

Wherein the at least four upper elastic members further comprise fifth and sixth upper elastic members separated from each other, wherein each of the fifth and sixth upper elastic members is formed in a direction orthogonal to the first direction, And a first protruding frame connected to the first protruding frame.

Each of the first and second lower elastic members may be formed at a position opposite to the first projecting frame and include a second projecting frame connected to the energizing member.

The energizing member may be such that an upper end is fixedly coupled to the first projecting frame and a lower end is fixedly coupled to the second projecting frame.

The supporting member may be such that the lower end thereof is fixedly coupled to the circuit board.

The support member may have a lower end fixedly coupled to the second coil.

The first length corresponding to the length of the energizing member measured from the lower surface of the upper elastic member to the upper surface of the lower elastic member is greater than the first length corresponding to the length of the support member measured from the lower surface of the upper elastic member to the upper surface of the circuit board 2 < / RTI > length.

The first length may be 0.3 mm to 0.5 mm.

One embodiment of the lens driving device includes a first sensor for sensing the displacement of the bobbin in the first direction, and the upper elastic member includes at least four first to fourth upper elastic members separated from each other , And the first sensor may be connected to the plurality of support members via the first to fourth upper elastic members.

The lower elastic member may include at least two first and second lower elastic members separated from each other and the first coil may be connected to the plurality of support members via the first and second lower elastic members .

The first sensor may be disposed, coupled, or mounted on the bobbin and moved together.

One embodiment of the lens driving device may include a sensor substrate coupled to the bobbin, and the first sensor may have a shape that is arranged, coupled, or mountable on the sensor substrate.

An embodiment of the lens driving device includes: a first sensor for sensing a displacement of the bobbin in a first direction; And a second magnet disposed to face the first sensor, wherein the first and second magnets may be integral.

The first sensor and the first magnet may be disposed opposite to each other such that an imaginary central horizontal line passing through the center of the first sensor and orthogonal to the optical axis coincides with the top end of the first magnet.

The bobbin may be moved up and down in the optical axis direction with respect to a point where the imaginary center horizontal line coincides with the top end of the first magnet.

An embodiment of the lens driving device includes: a first sensor for sensing a displacement of the bobbin in a first direction; And a second magnet disposed to face the first sensor, wherein the first and second magnets may be separate.

The shape and the number of the plurality of support members may be symmetrical to each other in the second and third directions.

The lower elastic member may include at least four first through fourth lower elastic members separated from each other and the first sensor may be connected to the plurality of support members via the first through fourth lower elastic members .

One embodiment of the camera module includes the lens driving device described above; And an image sensor mounted on the circuit board.

In the embodiment, the lens driving device and the camera module including the lens driving device can accurately detect the displacement of the bobbin by using a sensor for detecting the displacement of the bobbin, and can reduce the weight of the housing to improve the responsiveness.

Further, the lens driving device has the effect of reducing the driving force required when the bobbin is driven in the second direction and the third direction due to the above-described structure. Therefore, the lens driving apparatus has the effect of enabling the correction of the shaking motion with a small driving force.

In addition, since no excessive driving force is applied to the supporting member, the durability of the lens driving apparatus including the supporting member can be enhanced.

1 is a schematic perspective view of a lens driving apparatus according to an embodiment.
2 is an exploded perspective view of the lens driving apparatus illustrated in Fig.
FIG. 3 is a perspective view of a lens driving apparatus according to an embodiment in which the cover member illustrated in FIGS. 1 and 2 is removed.
4 is an exploded perspective view of the bobbin, the first coil, the magnet, the first sensor, and the sensor substrate in the lens driving apparatus according to the embodiment.
FIG. 5A is a plan view of the bobbin and magnet shown in FIG. 4, FIG. 5B is a perspective view of another embodiment of the sensor substrate shown in FIG. 4, FIG. 5C is a perspective view of the first sensor and the sensor substrate Fig.
6 is a planar perspective view of the housing according to the embodiment.
7 is an exploded bottom perspective view of the housing and the magnet according to the embodiment.
8 is a cross-sectional view taken along the line II 'shown in FIG.
9 is a graph showing the accuracy according to the optimum position of the first sensor.
10 is a planar perspective view showing a bobbin, a housing, an upper elastic member, a first sensor, a sensor substrate, and a plurality of support members.
11 shows a bottom perspective view in which a bobbin, a housing, a lower elastic member, and a plurality of support members are combined.
12 shows an assembled perspective view of an upper elastic member, a lower elastic member, a supporting member, an energizing member, and a circuit board according to the embodiment.
13 is a front elevational view of an upper elastic member, a lower elastic member, a supporting member, an energizing member, a circuit board, a bobbin, and a first coil according to the embodiment.
14 shows an exploded perspective view of the base, the second coil and the circuit board.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments are to be considered in all aspects as illustrative and not restrictive, and the invention is not limited thereto. It is to be understood, however, that the embodiments are not intended to be limited to the particular forms disclosed, but are to include all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience.

The terms "first "," second ", and the like can be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. In addition, terms specifically defined in consideration of the constitution and operation of the embodiment are only intended to illustrate the embodiments and do not limit the scope of the embodiments.

In the description of the embodiments, when it is described as being formed on the "upper" or "on or under" of each element, the upper or lower (on or under Quot; includes both that the two elements are in direct contact with each other or that one or more other elements are indirectly formed between the two elements. Also, when expressed as "on" or "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

It is also to be understood that the terms "top / top / top" and "bottom / bottom / bottom", as used below, do not necessarily imply nor imply any physical or logical relationship or order between such entities or elements, But may be used only to distinguish one entity or element from another entity or element.

It is also to be understood that the terms "first" and "second," "upper / upper / upper," and "lower / lower / lower" But may be used only to distinguish one entity or element from another entity or element, without necessarily requiring or implying an order.

The thickness and size of each layer in the drawings are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size of each component does not entirely 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 explanation, the lens driving apparatus according to the embodiment is described using the Cartesian coordinate system (x, y, z), but may be described using another coordinate system, and the embodiment is not limited to this. In the drawings, the x-axis and the y-axis indicate directions perpendicular to the z-axis, which is the optical axis direction, the z-axis direction as the optical axis direction is referred to as a first direction, the x-axis direction is referred to as a second direction, The axial direction can be referred to as a 'third direction'.

The "camera-shake correction device" applied to a small-sized camera module of a mobile device such as a smart phone or a tablet PC is to prevent the outline of the captured image from being formed due to the vibration caused by the hand- ≪ / RTI >

The "auto focusing device" is a device that automatically focuses an image of a subject on an image sensor surface. The camera shake correcting device and the auto focusing device may be configured in various manners. In the lens driving device according to the embodiment, the optical module composed of at least one lens is moved in a first direction parallel to the optical axis, It is possible to perform the camera shake correcting operation and / or the auto focusing operation by moving with respect to the surface formed by the second and third directions perpendicular to the optical axis.

Here, the second and third directions may include directions substantially in the x- and y-axis directions as well as the x- and y-axis directions. In other words, as seen from the driving aspect of the embodiment, the housing 140 may move parallel to the x- and y-axes, but may also be slightly inclined to the x- and y-axes when it is supported by the support member 220 have.

Fig. 1 shows a schematic perspective view of a lens driving apparatus according to an embodiment, and Fig. 2 shows an exploded perspective view of the lens driving apparatus illustrated in Fig.

Referring to FIGS. 1 and 2, the lens driving apparatus according to the embodiment may include a first lens driving unit, a second lens driving unit, and a cover member 300.

The first lens driving unit can perform the function of the above-described auto focusing device. That is, the first lens driving unit can perform the function of moving the bobbin 110 in the first direction by the interaction of the magnet 130 and the first coil 120.

The second lens driving unit can perform the function of the above-described shake correction apparatus. That is, the second lens driving unit can perform the function of moving all or a part of the first lens driving unit in the second and / or third directions by the interaction of the magnet 130 and the second coil 230 .

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

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

The first lens driving unit includes a bobbin 110, a first coil 120, a magnet 130, a housing 140, an upper elastic member 150, A second sensor 160, a first sensor 170, and a sensor substrate 180.

4 is a block diagram of a lens driving apparatus according to an embodiment of the present invention. The lens driving apparatus includes a bobbin 110, a first coil 120, a magnet 130 (130-1, 130-2, 130-3, 130-4) And a sensor substrate 180. As shown in Fig.

5A is a plan view of the bobbin 110 and the magnets 130-1, 130-2, 130-3, and 130-4 shown in FIG. 4. FIG. 5B is a plan view of the sensor substrate 180 FIG. 5C is a rear perspective view of the first sensor 170 and the sensor substrate 180 shown in FIG. 4 according to an embodiment of the present invention.

Referring to the drawings, the bobbin 110 may be installed in the inner space of the housing 140 so as to reciprocate in a first direction that is the optical axis direction or a direction that is parallel to the first direction. A 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 magnet 130 can perform electromagnetic interaction. To this end, the magnet 130 may be disposed opposite the first coil 120 at the periphery of the bobbin 110.

When the bobbin 110 is raised and / or lowered in a first direction parallel to the optical axis or in a direction parallel to the first direction to perform the auto focusing function, the upper and lower elastic members 150, Lt; / RTI > For this purpose, the upper and lower elastic members 150 and 160 may be combined with the bobbin 110 and the housing 140 as described later.

Although not shown, the lens driving device may include a lens barrel (not shown) on the inner side (i.e., inside) of the bobbin 110 where at least one lens may be installed. The lens barrel may be installed inside the bobbin 110 in various ways. For example, the lens barrel may be directly fixed to the inside of the bobbin 110, or a single lens may be formed integrally with the bobbin 110 without a lens barrel. The lens coupled to the lens barrel may be composed of a single sheet or two or more lenses may be configured to form an optical system.

According to another embodiment, male threads are formed on the inner circumferential surface of the bobbin 110, male screw threads corresponding to female threads are formed on the outer circumferential surface of the lens barrel, and the lens barrel is connected to the bobbin 110, but the embodiment is not so limited.

The bobbin 110 may include first and second protrusions 111 and 112.

The first protrusion 111 may include a guide portion 111a and a first stopper 111b. The guide portion 111a may serve to guide the installation position of the upper elastic member 150. [ For example, as illustrated in FIG. 3, the guide portion 111a can guide the passage of the upper frame connecting portion 153 of the upper elastic member 150 through. To this end, according to the embodiment, the plurality of guide portions 111a may be protruded in the second and third directions perpendicular to the first direction. Further, as illustrated, the guide portion 111a may be provided symmetrically with respect to the center of the bobbin 110 on a plane formed by the x-axis and the y-axis, and interference with other components may be excluded As shown in FIG.

The second protrusion 112 may protrude in the second and third directions perpendicular to the first direction. The upper surface 112a of the second protrusion 112 may have a shape capable of receiving the first inner frame 151 of the upper elastic member 150 described later.

Fig. 6 is a perspective view of the housing 140 according to the embodiment, and Fig. 7 is an exploded perspective view of the bottom surface of the housing 140 and the magnet 130 according to the embodiment.

Referring to FIG. 6, the housing 140 may include a first seating groove 146 formed at a position corresponding to the first and second protrusions 111 and 112.

The first stopper 111b and the second protrusion 112 of the first protrusion 111 are arranged in a first direction parallel to the optical axis or in a direction parallel to the first direction for the auto focusing function of the bobbin 110 It is possible to prevent the bottom surface of the bobbin 110 from directly colliding with the upper surface of the base 210 and the upper surface of the circuit board 250 even if the bobbin 110 moves over a prescribed range due to an external impact or the like Can play a role. The first stopper 111b may protrude from the outer circumferential surface of the bobbin 110 in the second or third direction in the circumferential direction more than the guide portion 111a, And may protrude laterally from an upper surface 112a on which the second electrode 150 is seated.

6, when the bottom surface of the first and second protrusions 111 and 112 and the bottom surface 146a of the first seating groove 146 are in contact with each other at an initial position, Directional control in a voice coil motor (VCM). That is, when the current is supplied to the first coil 120, the bobbin 110 rises, and when the supply of current is interrupted, the bobbin 120 falls and an auto-focusing function can be realized.

However, if the bottom surface of the first and second protrusions 111 and 112 and the bottom surface 146a of the first seating groove 146 are spaced a predetermined distance apart from each other at an initial position, It can be controlled according to the direction of the current, such as bi-directional control in the motor. That is, the autofocusing function may be realized by moving the bobbin 110 in the upward or downward direction parallel to the optical axis. For example, when the forward current is applied, the bobbin 110 can move upward, and when the reverse current is applied, the bobbin 110 can move downward.

The third protrusion 148 of the housing 140 may be convexly formed at the position of the housing 140 corresponding to the space having the first width W1 between the first and second protrusions 111 and 112 . The surface of the third protrusion 148 facing the bobbin 110 may have the same shape as the side surface of the bobbin 110. At this time, the first width W1 between the first and second protrusions 111 and 112 shown in FIG. 4 and the second width W2 of the third protrusion 148 shown in FIG. 6 have a certain tolerance . As a result, rotation of the third projection 148 between the first and second projections 111 and 112 can be restricted. Then, even if the bobbin 110 is subjected to a force in the direction of rotating about the optical axis other than the optical axis direction, the third protrusion 148 can prevent the bobbin 110 from rotating.

According to the embodiment, the first sensor 170 may be disposed on, bonded to, or mounted on the bobbin 110 to move together with the bobbin 110. The first sensor 170 senses displacement of the bobbin 110 in a first direction parallel to the optical axis or in a direction parallel to the first direction, and outputs the sensed result as a feedback signal. The bobbin 110 is moved in the first direction or in a direction parallel to the first direction by using the result of sensing the displacement of the bobbin 110 in the first direction or in the direction parallel to the first direction, Displacement can be adjusted.

The first sensor 170 may be disposed, bonded, or mounted on the bobbin 110 or the housing 140 in various forms and may be mounted on the first sensor 170 according to the manner in which the first sensor 170 is placed, 170 may be supplied with current in various ways.

According to an embodiment, a separate sensor magnet (not shown) facing the first sensor 170 may be disposed on the bobbin 110 by fastening the first sensor 170 to the housing 140. The first sensor 170 may be disposed on the side surface or edge of the first seating groove 146 of the housing 140 illustrated in Fig. 6 (e.g., the surface of the third projection 148) . In this case, due to the magnetic force exerted by the magnet for the sensor on the magnet 130, tilting occurs in the bobbin 110 moving in the first direction or the direction parallel to the first direction, and the accuracy of the feedback signal Can be degraded. In consideration of this, a separate sensor magnet may be disposed, coupled, or mounted on the bobbin 110 where the mutual action of the magnet for the sensor and the magnet 130 is minimized.

According to another embodiment, the first sensor 170 may be disposed, bonded, or mounted directly on the outer circumferential surface of the bobbin 110. In this case, a surface electrode (not shown) is formed on the outer circumferential surface of the bobbin 110, and the first sensor 170 can receive a current through the surface electrode.

According to yet another embodiment, the first sensor 170 may be indirectly disposed, coupled, or mounted to the bobbin 110 as shown. For example, the first sensor 170 may be disposed, coupled, or mounted on the sensor substrate 180, and the sensor substrate 180 may be coupled to the bobbin 110. That is, the first sensor 170 may be indirectly disposed, coupled, or mounted on the bobbin 110 through the sensor substrate 180.

When the first sensor 170 is disposed directly or indirectly to the bobbin 110 as in the above-described other embodiments and another embodiment, the magnet for the sensor may be disposed separately from the magnet 130, 130 may be used as the magnet for the sensor.

Hereinafter, the first sensor 170 is indirectly disposed, coupled, or mounted on the bobbin 110 through the sensor substrate 180, and the magnet 130 is used as the magnet for the sensor, It is not limited.

4 and 5A, a support groove 114 is provided on the side of the bobbin 110, and the sensor substrate 180 may be inserted into the support groove 114 and coupled to the bobbin 110. For example, the sensor substrate 180 may be ring shaped as shown, but embodiments are not limited to the shape of the sensor substrate 180. The support groove 114 may be provided between the outer circumferential surface of the bobbin 110 and the first and second projections 111 and 112. At this time, the first sensor 170 may have a shape that can be arranged, joined, or mounted on the sensor substrate 180. 4 and 5B, the first sensor 170 may be arranged in various forms on the upper side A1, the middle A2 or the lower side A3 of the outer circumferential surface of the sensor substrate 180, for example, Bonded, or mounted. At this time, the first sensor 170 can receive a current from the outside through the circuit of the sensor substrate 180. For example, as illustrated in FIG. 5B, a mounting groove 183 is formed on the outer circumferential surface of the sensor substrate 180, and the first sensor 170 can be disposed, coupled, or mounted in the mounting groove 183 have. A tapered inclined surface (not shown) may be formed on at least one surface of the mounting groove 183 so that epoxy injection or the like for assembling the first sensor 170 can be performed more smoothly. In addition, although epoxy or the like may not be injected into the mounting groove 183, it is also possible to increase the arrangement force, bonding force, or mounting force of the first sensor 170 by injecting epoxy or the like.

Alternatively, as illustrated in FIG. 4, the first sensor 170 may be attached to the front surface of the sensor substrate 180 using an adhesive such as epoxy or double-sided tape. As illustrated in FIG. 4, the first sensor 170 may be disposed, coupled, or mounted in the center of the sensor substrate 180.

The bobbin 110 may include a receiving groove 116 adapted to receive a first sensor 170 disposed, bonded, or mounted on a sensor substrate 180. Further, the receiving groove 116 may be formed in the space between the first and second protrusions 111 and 112.

The sensor substrate 180 may include a body 182, elastic member contacts 184-1, 184-2, 184-3 and 184-4 and circuit patterns L1, L2, L3 and L4.

When the support groove 114 formed between the outer peripheral surface of the bobbin 110 and the first and second projections 111 and 112 has the same shape as the outer peripheral surface of the bobbin 110, 182 may have a shape that can be inserted and fixed in the support groove 114. As illustrated in Figs. 3-5A, the support groove 114 and the body 182 may have a circular planar shape, although embodiments are not limited in this respect. According to another embodiment, the support groove 114 and the body 182 may have a polygonal planar shape.

The body 182 of the sensor substrate 180 may include a first segment 170 disposed on, coupled with, or mounted to the outer surface of the sensor substrate 180, and a second segment extending in contact with the first segment. The sensor substrate 180 may be easily inserted into the support groove 114 by providing an opening 181 at a portion facing the first segment, Lt; / RTI >

The elastic member abutting portions 184-1, 184-2, 184-3, and 184-4 may be disposed in a direction that can contact the first inner frame 151 from the body 182, for example, And may protrude in a direction parallel to the first direction. The elastic member contacts 184-1, 184-2, 184-3, and 184-4 are portions to be connected to the first inner frame 151 of the upper elastic member 150 described later.

The circuit patterns L1, L2, L3 and L4 are formed on the body 182 and electrically connect the first sensor 170 and the elastic member contacts 184-1, 184-2, 184-3 and 184-4 . For example, the first sensor 170 may be a hall sensor, and any sensor capable of detecting a change in magnetic force may be used.

If the first 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. For example, referring to FIG. 5C, the first pin may include a 1-1 pin (P11) and a 1-2 pin (P12) connected to a voltage and a ground, respectively, And a second-1-pin P21 and a second-2-pin P22 for outputting the result. Here, the sensed result, which is the feedback signal output through the 2-1 and 2-2 pins P21 and P22, may be current, but the embodiment is not limited to the form of the feedback signal.

The 1-1, 1-2, 2-1 and 2-2 pins (P11, P12, P21, P22) of the first sensor 170 are connected via the circuit patterns L1, L2, L3 and L4 And may be electrically connected to the elastic member contacts 184-1, 184-2, 184-3, and 184-4, respectively. For example, referring to FIG. 5C, first, second, third, and fourth lines L1, L2, L3, and L4, which are circuit patterns, And the second-two pins P11, P12, P21 and P22 are connected to the fourth, third, second and first elastic member contacts 184-4, 184-3, 184-1 and 184-2, respectively . According to one embodiment, the first through fourth lines L1, L2, L3 and L4 may be formed so as to be seen with the naked eye, and according to another embodiment, these (L1, L2, L3 and L4) Or may be formed on the body 182 so as not to be seen.

8 is a cross-sectional view taken along the line I-I 'shown in FIG.

8, a virtual center horizontal line 172 passing through the center of the first sensor 170 in the optical axis direction and formed in the second direction perpendicular to the optical axis coincides with the top end 131 of the magnet 130, The first sensor 170 may be arranged to face the magnet 130. [

The bobbin 110 can move up and down in a first direction which is the optical axis direction or a direction parallel to the first direction at a point where the imaginary center horizontal line 172 coincides with the top end 131 of the magnet 130 However, the embodiment is not limited to this.

9 is a graph showing the accuracy according to the optimum position of the first sensor 170. The horizontal axis indicates the position of the first sensor 170 and the vertical axis indicates the accuracy of the first sensor 170. [

8 and 9, it can be seen that the sensing efficiency of the first sensor 170 is maximized when the imaginary center horizontal line 172 is located at the top end 131 of the magnet 130.

10 shows a planar perspective view in which the bobbin 110, the housing 140, the upper elastic member 150, the first sensor 170, the sensor substrate 180, and the plurality of support members 220 are coupled.

11 shows a bottom perspective view in which the bobbin 110, the housing 140, the lower elastic member 160, and the plurality of support members 220 are combined.

The first coil 120 is wound on the outer circumferential surface of the bobbin 110 by a worker or a machine and then the lines of sight and the longitudinal lines of both ends of the first coil 120 extend from the bottom surface of the bobbin 110 in the first direction And can be wound and fixed on a pair of protruding winding projections 119. At this time, the position of the end of the first coil 120 wound around the winding projection 119 may vary depending on the operator. As illustrated in Fig. 11, the winding projections 119 may be arranged at a pair of positions symmetrical with respect to the center of the bobbin 110, but the embodiments are not limited thereto.

The first coil 120 may be inserted into the coil groove 118 formed on the outer side of the bobbin 110 as illustrated in FIG. In addition, as illustrated in FIG. 2, the first coil 120 may be provided as an angular ring-shaped coil block, but is not limited thereto. According to another embodiment, the first coil 120 may be directly wound on the outer circumferential surface of the bobbin 110, or may be wound using a coil ring (not shown). Here, the coil ring may be coupled to the bobbin 110 in the same manner that the sensor substrate 180 is fitted and fixed to the support groove 114, and the first coil 120 is wound on the outer side of the bobbin 110 It can be wound on the coil ring instead of being disposed. In any case, the line of sight and the vertical line of the first coil 120 can be wound and fixed on the winding projection 119, and the other structures are the same.

The first coil 120 may be formed in a substantially octagonal shape as shown in FIG. This corresponds to the shape of the outer peripheral surface of the bobbin 110 because the bobbin 110 has an octagonal shape as illustrated in FIG. 5A. In addition, at least four surfaces of the first coil 120 may be formed in a straight line, and corner portions connecting these surfaces may be provided in a straight line, but the present invention is not limited thereto and may be formed in a round shape.

The portion formed linearly in the first coil 120 may be formed to be a surface corresponding to the magnet 130. The surface of the magnet 130 corresponding to the first coil 120 may have the same curvature as the curvature of the first coil 120. That is, if the first coil 120 is a straight line, the surface of the corresponding magnet 130 may be straight, and if the first coil 120 is a curved line, the surface of the corresponding magnet 130 may be curved. Further, even if the first coil 120 is a curved line, the surface of the corresponding magnet 130 may be straight or vice versa.

The first coil 120 moves the bobbin 110 in a first direction parallel to the optical axis or in a direction parallel to the first direction so as to perform an autofocus function. When the current is supplied, the first coil 120 interacts with the magnet 130 And the generated electromagnetic force can move the bobbin 110 in the first direction or in the direction parallel to the first direction.

The first coil 120 may be configured to correspond to the magnet 130. If the magnet 130 is formed as a single body and the entire surface facing the first coil 120 is provided with the same polarity, 1 coil 120 may also be configured such that the surface of magnet 130 and the corresponding surface have the same polarity.

Alternatively, when the magnet 130 is divided into two or more by two or four divisions on a plane perpendicular to the optical axis and two or more faces facing the first coil 120 are divided, the first coil 120 is also divided (130).

The magnet 130 may be installed at a position corresponding to the first coil 120. For example, referring to FIG. 8, the magnet 130 may be disposed to face the first coil 170 while facing the first sensor 170. This is because, as described above, according to one embodiment, the magnet for the first sensor 170 is not disposed separately but the magnet 130 is used as the magnet for the first sensor 170.

In this case, the magnet 130 may be received and supported by the first side 141 of the housing 140 as shown in FIG. The shape of the magnet 130 may correspond to the first side 141 of the housing 140 and may have a substantially rectangular parallelepiped shape and a surface of the magnet 130 facing the first coil 120 may have a shape corresponding to that of the first coil 120 It can be formed so as to correspond to the curvature of the surface.

Referring to FIG. 5A, the magnet 130 may be formed as a single body. In this embodiment, the S pole 132 and the N pole 134 facing the first coil 120 and the N pole 134, respectively, Can be deployed. However, the present invention is not limited to this, and it is also possible to configure the other way around.

At least two magnets 130 may be provided, and four magnets 130 may be provided according to the embodiment. At this time, the magnet 130 may have a substantially rectangular shape as illustrated in FIG. 5A, or alternatively may have a triangular shape or a rhombus shape.

However, the surface of the magnet 130 facing the first coil 120 may be formed in a straight line, but the present invention is not limited thereto. When the corresponding surface of the first coil 120 is a curved surface, As shown in FIG. With this configuration, the distance from the first coil 120 can be kept constant. In the case of the embodiment, one each may be provided on the four first side portions 141 of the housing 140. However, the present invention is not limited thereto, and only one of the magnet 130 and the first coil 120 may be planar and the other may be curved. Or both surfaces of the first coil 120 and the magnet 130 may be curved and the curvatures of the first coil 120 and the magnet 130 facing each other may be the same.

5A, if the plane of the magnet 130 is rectangular, a pair of the plurality of magnets 130 may be arranged in parallel in the second direction, and the other pair may be arranged in parallel in the third direction . According to such an arrangement structure, it is possible to control the movement of the housing 140 for correcting camera shake, which will be described later.

6, the upper side of the outer periphery of the housing 140 may have a rectangular planar shape, but may have a rectangular shape as illustrated in FIGS. 6 and 7, Likewise, the lower side of the inner margin can have an octagonal planar shape. Thus, the housing 140 may include a plurality of sides and may include, for example, four first side portions 141 and four second side portions 142.

The first side 141 corresponds to a portion where the magnet 130 is installed and the second side 142 corresponds to a portion where a support member 220 to be described later is disposed. The first side 141 interconnects the plurality of second sides 142 and may include a plane of constant depth.

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

The magnet 130 may be fixed to the magnet seating part 141a with an adhesive, but 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 mounting hole may be formed in which a part of the magnet 130 can be exposed or fitted.

The first side 141 may be disposed parallel to the side surface of the cover member 300. Also, the first side 141 may be formed to have a larger surface than the second side 142. The second side 142 may form a path through which the support member 220 passes. The upper portion of the second side 142 may include a first through hole 147. The support member 220 may be connected to the upper elastic member 150 through the first through hole 147.

In addition, the housing 140 may further include a second stopper 144. The second stopper 144 can prevent the body-side surface of the housing 140 from directly colliding with the inner surface of the cover member 300 shown in Fig.

In addition, a plurality of first upper support protrusions 143 may protrude from the upper surface of the second side 142 of the housing 140. The plurality of first upper support protrusions 143 may have a hemispherical shape as illustrated, or alternatively may have a cylindrical or prismatic shape. However, the embodiment is not limited to the shape of the first upper support protuberance 143 Do not.

6 and 7, the reason that the first groove 142a is formed in the second side 142 of the housing 140 is not only to form a passage through which the support member 220 passes, So as to secure a space for filling the damping member capable of acting. That is, the groove 142a may be filled with the damping member.

The damping member may be made of a photocurable resin. Suitably, the damping member may be made of UV curable resin, more preferably the damping member may be made of UV-curable silicone, and the damping member may be formed in gel form.

12 shows an assembled perspective view of an upper elastic member 150, a lower elastic member 160, a support member 220, a current carrying member 154 and a circuit board 250 according to the embodiment.

The lower elastic member 160 may be formed in a two-piece structure for applying power to the first coil 120 and the upper elastic member 150 may be formed to output a feedback signal from the first sensor 170 And may be formed in a quadrant structure to apply power to the first sensor 170.

The first coil 120 may be energized with the upper elastic member 150, the lower elastic member 160 and the circuit board 250 to receive power from the circuit board 250. The concrete structure is as follows.

According to the embodiment, the upper elastic member 150 includes at least four first to fourth upper elastic members 150 (150-1, 150-2, 150-3, 150-4) electrically separated from each other . The elastic member contacting portions 184-1, 184-2, 184-3, and 184-4 connected to the first sensor 170 are connected to the first to fourth upper elastic members 150-1, 150-2, 150-3, 150-4 so as to be connected to the plurality of support members 220. [ That is, the first upper elastic member 150-1 connected to the elastic member contact portion 184-4 is connected to the first and second support members 220-1a and 220-1 The second upper elastic member 150-2 connected to the elastic member contact portion 184-3 is connected to the second support member 220-2 and the elastic member contact portion 184-2 The third upper elastic member 150-3 connected to the third supporting member 220-3 is connected to the third and the third supporting members 220-3a and 220-3b, The fourth upper elastic member 150-4 connected to the fourth support member 220-4 may be connected to the fourth support member 220-4.

Each of the first and third upper elastic members 150-1 and 150-3 includes a first inner frame 151, a first outer frame 152a, and a first frame connecting portion 153 And the second and fourth upper elastic members 150-2 and 150-4 each include a first inner frame 151, a first outer frame 152b and a first frame connecting part 153 can do. The first inner frame 151 can engage with the bobbin 110 and the corresponding elastic member contacts 184-1, 184-2, 184-3, and 184-4. As shown in FIG. 4, when the upper surface 112a of the second projection 112 is flat, the first inner frame 151 may be placed on the upper surface 112a and then fixed by the adhesive member. 4, when the support protrusion (not shown) is formed on the upper surface 112a, the second-1 through-hole 151a formed in the first inner frame 151 is supported by the support protrusions And then fixed with an adhesive member such as an epoxy or the like.

The first outer frame 152a may be coupled to the housing 140 and may be connected to the support member 220. The first frame connecting portion 153 may include a first inner frame 151 and a first outer frame 152, The frames 152a and 152b can be connected. The first outer frame 152b has a shape obtained by bisecting the first outer frame 152a, but the embodiment is not limited to this. That is, according to another embodiment, the first outer frame 152a may be divided into the same shape as the first outer frame 152b.

The first frame connector 153 may be bent at least once to form a predetermined pattern. The bobbin 110 can be resiliently supported in the first direction parallel to the optical axis by the position change and the fine deformation of the first frame connection part 153.

The plurality of first upper support protrusions 143 of the housing 140 can couple and fix the first outer frame 152a and 152b of the upper elastic member 150 illustrated in Figure 12 and the housing 140 have. According to the embodiment, a second through hole 157 having a shape corresponding to the position corresponding to the first upper support protrusion 143 in the first outer frame 152a, 152b may be formed. At this time, the first upper support protrusions 143 and the second through holes 157 may be fixed by heat fusion or may be fixed with an adhesive such as epoxy. In order to fix the plurality of first to fourth upper elastic members 150-1, 150-2, 150-3, and 150-4, a sufficient number of the first upper support protrusions 143 can be provided. Therefore, the first to fourth upper elastic members 150-1, 150-2, 150-3, and 150-4 and the housing 140 can be prevented from being incompletely engaged.

In addition, the distance between the plurality of first upper support protrusions 143 can be appropriately arranged within a range in which interference with peripheral components can be avoided. That is, each of the first upper support protrusions 143 may be symmetrically arranged with respect to the center of the bobbin 110 at a certain interval and may be disposed on the side of the edge of the housing 140, May be arranged to be symmetrical with respect to a certain imaginary line passing through the center of the line.

After the first inner frame 151 is engaged with the bobbin 110 and the first 1-1 outer frames 152a and 152b are coupled to the housing 140, the elastic member contacts 184-1 CP12, CP13, and CP14 such as soldering are performed on the first inner frame 151 and the first inner frame 151 as shown in FIG. 10, The power of different polarities is applied to the two pins P11 and P12 out of the four pins P11, P12, P21 and P22 of the first sensor 170 and the other two pins (P21, P22). The upper elastic member 150 is connected to the first to fourth upper elastic members 150-1, 150-2, 150-3, and 150-3 so as to be able to receive the power of different polarity and output the feedback signals of different polarities, 150-4).

The first to fourth upper elastic members 150-1, 150-2, 150-3 and 150-4 are connected to the circuit board 250 through the supporting member 220. [ That is, the first upper elastic member 150-1 is connected to the circuit board 250 through at least one of the 1-1 or 1-2 support members 220-1a and 220-1b, The elastic member 150-2 is connected to the circuit board 250 through the second support member 220-2 and the third upper elastic member 150-3 is connected to the third- The fourth upper elastic member 150-4 is connected to the circuit board 250 through the fourth supporting member 220-4 and the second upper elastic member 150-4 is connected to the circuit board 250 through at least one of the first and second supporting members 220-3a and 220-3b. Lt; / RTI > The first sensor 170 receives power supplied from the circuit board 250 through the support member 220 and the upper elastic member 150 or provides a feedback signal output from the first sensor 170 to the circuit board 250 It is possible.

Meanwhile, the lower elastic member 160 may include first and second lower elastic members 160-1 and 160-2 electrically separated from each other. The first coil 120 may be connected to the plurality of support members 220 through the first and second lower elastic members 160-1 and 160-2.

Each of the first and second lower elastic members 160-1 and 160-2 includes at least one second inner frame 161-1 and 161-2 and at least one second outer frame 162-1 and 162- 2 and at least one second frame connector 163-1, 163-2.

The second inner frames 161-1 and 161-2 may be coupled to the bobbin 110 and the second outer frames 162-2 and 162-2 may be coupled to the housing 140. [ The second-1 frame connecting portion 163-1 connects the second inner frame 161-1 and the second outer frame 162-1, and the second-second frame connecting portion 163-2 connects the second inner frame 161-1 and the second outer frame 162-1. Two outer frames 162-1 and 162-2 can be connected and the second and third frame connection portions 163-3 can connect the second inner frame 161-2 and the second outer frame 162-2 .

The first lower elastic member 160-1 further includes a first coil frame 164-1 and the second lower elastic member 160-2 further includes a second coil frame 164-2. can do. 11, the first and second coil frames 164-1 and 164-2 are disposed on the upper surface at a position close to a pair of the winding projections 119 on which the both ends of the first coil 120 are wound The ends of the first coil 120 are electrically connected by a conductive connecting member such as solder and the first and second lower elastic members 160-1 and 160-2 are supplied with power of different polarities, Lt; / RTI > coil 120, as shown in FIG. The lower elastic member 160 is divided into two parts by the first and second lower elastic members 160-1 and 160-2 so as to be supplied with the power of different polarity and to be transmitted to the first coil 120. [ .

Further, each of the first and second lower elastic members 160-1 and 160-2 may further include a second-fourth frame connection portion 163-4. The second 2-4 frame connection portion 163-4 can connect the coil frame 164 and the second inner frame 161-2.

At least one of the above-mentioned second to fourth through fourth frame connection portions 163-1, 163-2, 163-3, and 163-4 is formed by bending at least once to form a pattern of a predetermined shape . Particularly, the bobbin 110 moves upward and / or downward in the first direction parallel to the optical axis through the positional change and fine deformation of the second- and second-frame connection portions 163-1 and 163-3 Can be elastically supported.

According to an embodiment, each of the first and second lower elastic members 160-1 and 160-2 may further include a second protruding frame 165 as illustrated. The second protruding frame 165 protrudes from the second-second frame connecting portion 163-2 and is a portion where the energizing member 154 can be fixedly coupled. The upper elastic member 160 may further include fifth and sixth upper elastic members 150-5 and 150-6 electrically separated from each other.

Each of the fifth and sixth upper elastic members 150-5 and 150-6 may include a first protruding frame 155 to which the energizing member 154 is fixedly coupled. Meanwhile, the energizing member 154 may be connected to the second protruding frame 165, and the longitudinal direction thereof may be disposed in the first direction.

The first and second protruding frames 155 and 165 are disposed at positions corresponding to each other in the first direction so that both ends of the energizing member 154 are coupled and their longitudinal directions are arranged in the first direction .

Meanwhile, the fifth and sixth upper elastic members 150-5 and 150-6 may be connected to the support member 220, respectively. That is, the fifth upper elastic member 150-5 may be connected to the fifth support member 220-5 and the sixth upper elastic member 150-6 may be connected to the sixth support member 220-6 .

At this time, the first and second lower elastic members 160-1 and 160-2 may be integrally formed with the respective second protruding frames 165, and similarly, the fifth and sixth elastic members 150-5 , 150-6 may be integrally formed with the first protruding frame 155. [ The upper end of the energizing member 154 is fixedly coupled to the first protruding frame 155 and the lower end of the energizing member 154 is fixedly coupled to the second protruding frame 165. [

At this time, the first and second protruding frames 155 and 165 and the conductive member 154 may be fixedly coupled to each other using soldering, an electrically conductive adhesive, or the like. At this time, the first and second protruding frames 155 and 165 are respectively provided with the energizing member 154 and the second energizing member 154 in order to facilitate the rigid coupling and coupling operation of the first and second protruding frames 155 and 165 and the energizing member 154, A hole or a groove through which the light emitting diode can be inserted can be provided.

 As described above, the first and second lower elastic members 160-1 and 160-2 and the fifth and sixth upper elastic members 150-5 and 150-6 are arranged in the longitudinal direction in the first direction The conductive member 154 can be mechanically and electrically connected.

The conductive member 154 may be formed of a flexible material or an elastic material capable of bending in a direction perpendicular to the longitudinal direction of the bobbin 110 as the bobbin 110 moves in the second and third directions.

At this time, the lower ends of the plurality of support members 220 may be fixedly coupled to the circuit board 250. Alternatively, the lower ends of the plurality of support members 220 may be fixedly coupled to the second coil. Accordingly, even when the bobbin moves in the second direction or the third direction, the lower end may be fixed to the circuit board 250 or the second coil 230 so as not to move.

According to another embodiment, unlike the case shown in FIG. 12, a metal piece (not shown) to be inserted or attached to the housing 140 may be further provided. In this case, for example, the first and second outer frames 158 and 163-2 may be connected to each other by a metal piece. In this case, the first and second protruding frames 155 and 165 and the energizing member 154 shown in Fig. 12 may be omitted.

The first and second outer frames 158 may include a second through hole 157 like the first outer frame 152b.

According to an embodiment, the first to sixth outer side frames 152a and 152b of the first to sixth upper elastic members 150-1, 150-2, 150-3, 150-4, 150-5, May be arranged to face each other in a diagonal direction, and the first and second outer frames 158 may be disposed to face each other in a diagonal direction. That is, the first outer frame 152a of the first upper elastic member 150-1 and the first outer frame 152a of the third upper elastic member 150-3 are opposed to each other in the diagonal direction . The first 1-1 outer frame 152b of the second upper elastic member 150-2 and the 1-1 second outer frame 152b of the fourth upper elastic member 150-4 face each other diagonally . The first 1-2 outer frame 158 of the fifth upper elastic member 150-5 and the 1-2 second outer frame 158 of the sixth upper elastic member 150-6 face each other in a diagonal direction .

The first and second lower elastic members 160-1 and 160-2 may include fifth and sixth upper elastic members 150-5 and 150-6 connected to the plurality of support members 220, Power is supplied from the circuit board 250 through the energizing member 154 connecting the second lower elastic members 160-1 and 160-2 and the fifth and sixth upper elastic members 150-5 and 150-6 And provides it to the first coil 120. That is, the first lower elastic member 160-1 is connected to the circuit board 250 via the energizing member 154, the sixth upper elastic member 160-6, and the sixth supporting member 220, The lower elastic member 160-2 may be connected to the circuit board 250 through the energizing member 154, the fifth upper elastic member 160-5, and the fifth supporting member 220-5.

11, a plurality of first lower support protrusions 117 are formed on the lower surface of the bobbin 110 so as to protrude from the second inner frames 161-1 and 161-2 of the lower elastic member 160, (110). A plurality of second lower support protrusions 145 protrude from the lower surface of the housing 140 to couple the second outer frames 162-1 and 162-2 of the lower elastic member 160 to the housing 140, Can be fixed.

At this time, the number of the second lower support protrusions 145 may be larger than the number of the first lower support protrusions 117. This is because the length of the second frame connecting portion 163-2 of the lower elastic member 160 is longer than the length of the first frame connecting portion 163-1.

As described above, since the lower elastic member 160 has a structure divided into two, the number of the first and second lower support protrusions 117 and 145 is sufficient as well as the number of the first upper support protrusions 143 It is possible to prevent the lifting phenomenon that may occur when the lower elastic member 160 is separated.

If the lower elastic member 160 is formed as a body rather than a divided structure, it is not necessary to form as many first and second lower support protrusions 117 and 145 as the first upper support protrusions 143. This is because the lower elastic member 160 can be stably coupled to the housing 140 with only a small number of the first and second lower support protrusions 117 and 145. [

However, as in the embodiment, when the lower elastic members 160 are separated into the first and second lower elastic members 160-1 and 160-2 so as not to be electrically connected to each other, In order to fix the lower elastic members 160-1 and 160-2, a sufficient number of the first and second lower support protrusions 117 and 145 may be provided. Therefore, it is possible to prevent the first and second lower elastic members 160-1 and 160-2 and the housing 140 from being incompletely engaged.

12, according to the embodiment, the first and second lower supporting projections (first and second lower supporting protrusions) 161-1 and 161-2 of the first and second lower elastic members 160-1 and 160-1, respectively, 117 may be formed in a shape corresponding to the position corresponding to the second through hole 117. At this time, the first lower support protrusions 117 and the third through holes 161a may be fixed by heat fusion, and they may be fixed by an adhesive member such as an epoxy or the like.

At the positions corresponding to the second lower support protrusions 145 in the second outer frames 162-1 and 162-2 of the first and second lower elastic members 160-1 and 160-2, A through hole 162a can be formed. At this time, the second lower support protrusions 145 and the fourth through holes 162a may be fixed by heat fusion or may be fixed with an adhesive such as epoxy.

Further, the distance between the plurality of first and second lower support protrusions 117, 145 can be appropriately arranged within a range in which interference with peripheral components can be avoided. That is, the first and second lower support protrusions 117 and 145 may be symmetrically arranged with respect to the center of the bobbin 110 at regular intervals.

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

Meanwhile, the bobbin 110, the housing 140, and the upper and lower elastic members 150 and 160 may be assembled through heat bonding and / or bonding using an adhesive or the like. At this time, it is possible to finish the fixing work by bonding using the adhesive after fixing by thermal fusion according to the assembling order.

For example, first, the bobbin 110 and the second inner frames 161-1 and 161-2 of the lower elastic member 160 are assembled, and the second inner frame 161-1 and 161-2 of the lower elastic member 160 are assembled. When assembling the two outer frames 162-1 and 162-2, the first lower support protrusion 117 of the bobbin 110 and the third through hole 161a coupled to the bobbin 110 and the housing 140 2 lower support protrusion 145 and the fourth through hole 162a coupled with the lower support protrusion 145 can be fixed by heat fusion. Third, when the first inner frame 151 of the upper elastic member 150 is first assembled, the elastic member contacts 184-1, 184-2, 184-3, and 184-4 of the sensor substrate 180 The first inner frame 151 of each of the first to fourth upper elastic members 150-1, 150-2, 150-3, and 150-4 may be fixed by heat fusion. The first and second outer frames 152a, 152b and 158 of the housing 140 and the upper elastic member 150 are fixed to the first upper side support 152 of the housing 140, The second through hole 157 coupled with the projection 143 can be bonded and bonded by applying an adhesive such as epoxy. However, this assembling sequence can be changed, that is, the assembly process from the first to the third is thermal fusion, and the final fourth bonding is performed. This can be accompanied by deformation such as twisting at the time of heat fusion, so that bonding can be supplemented in the last step.

In the case of the above-described embodiment, power is supplied to the first sensor 170 by using two electrically-upper elastic members 160, and the feedback signal output from the first sensor 170 is supplied to the other It is possible to supply power to the first coil 120 by using two upper elastic members 150 to be transmitted to the circuit board 250 and using two lower elastic members 160 electrically separated from each other. However, the embodiment is not limited to this.

That is, according to another embodiment, the roles of the plurality of upper elastic members 150 and the plurality of lower elastic members 160 may be changed. That is, electric power is supplied to the first coil 120 by using the two upper elastic members 150 electrically separated and the first sensor 170 is electrically connected to the lower elastic member 160 by using the two lower elastic members 160, And the feedback signal output from the first sensor 170 may be transmitted to the circuit board 250 using the other two lower elastic members 160 electrically separated from each other. Although not shown, this is apparent through the above-described drawings.

3, 6, 7, 10, and 11, a plurality of third stoppers 149 may protrude from the side surface of the housing 140. Referring to FIGS. The third stopper 149 is provided to prevent collision between the cover member 300 and the body of the housing 140 when the first lens driving unit is moved in the second and third directions. It is possible to prevent the side surface from directly colliding with the inner surface of the cover member 300. 3, the third stopper 149 is spaced apart from the outer surface of the housing 140 by two, but the embodiment is not limited to the position and number of the third stopper 149.

Although not shown, a fourth stopper may be additionally disposed on the lower side of the housing 140. The fourth stopper may protrude from the lower surface of the housing 140. The fourth stopper can prevent the bottom surface of the housing 140 from colliding with the base 210 and / or the circuit board 250, which will be described later. In addition, the fourth stopper may maintain a predetermined distance from the base 210 and / or the circuit board 250 during an initial state and a normal operation. With this configuration, the housing 140 can be spaced apart from the base 210 downward, and spaced apart from the cover member 300 at the upper side, so that the height in the optical axis direction can be maintained without vertical interference. Thus, the housing 140 may perform a shifting operation in the second and third directions.

The first lens driving unit according to the embodiment senses the position in the first direction which is the optical axis direction of the bobbin 110 or in the direction parallel to the first direction by using the first sensor 170, The movement can be precisely controlled. This may be possible by feeding the sensed position of the first sensor 170 to the outside through the circuit board 250.

According to one embodiment, in order to move the bobbin 110 in a first direction that is the optical axis direction or in a direction parallel to the first direction, a magnet 130 (hereinafter referred to as' A magnet (hereinafter referred to as 'sensing magnet') (not shown) facing the first sensor 170 may be additionally disposed. At this time, the interaction between the AF magnet 130 and the first coil 120 may be interrupted by the sensing magnet. This is because a magnetic field can be caused by the sensing magnet. Therefore, it is possible to prevent the bobbin 110 from being tilted by causing the sensing magnet, which is disposed separately, not to interact with the AF magnet 130 or with the AF magnet 130, 170 may be arranged to face a separate sensing magnet. In this case, the first sensor 170 may be disposed, coupled, or mounted on the bobbin 110, and the sensing magnet may be disposed, coupled, or mounted on the housing 140. Alternatively, the first sensor 170 may be disposed, coupled, or mounted on the housing 140, and the sensing magnet may be disposed, coupled, or mounted on the bobbin 110.

According to another embodiment, instead of disposing the sensing magnet separately, the AF magnet may be used as the sensing magnet to move the bobbin 110 in the first direction which is the optical axis direction or in the direction parallel to the first direction . For example, the first sensor 170 may be disposed on, coupled with, or mounted on the bobbin 110 without being disposed on the housing 140 so that the AF magnet 130 may also serve as a sensing magnet. (Not shown). Therefore, when the AF magnet and the sensing magnet coexist, the problem caused by the interaction between the two magnets can be solved at the source. For example, the need for a magnetic field compensating metal (not shown) to minimize the interaction between the magnet for AF and the sensing magnet can be eliminated.

The first lens driving unit may further include various devices for improving the auto focusing function of the first lens driving unit in addition to the first sensor 170. [ In this case, the method or the process of receiving the power via the circuit board 250 and supplying the feedback signal to the circuit board 250 may be the same as the first sensor 170.

2, the second lens driving unit includes a first lens driving unit, a base 210, a plurality of supporting members 220, a second coil 230 , A second sensor 240, and a circuit board 250. [

The first lens driving unit may have the configuration as described above, but may be replaced with an optical system that implements another type of auto focusing function in addition to the configuration described above. That is, instead of using the voice coil motor type auto focusing actuator, a single lens moving actuator or an optical module using a refractive index variable actuator may be used. That is, the first lens driving unit may be any optical actuator capable of performing the auto focusing function. However, the magnet 130 needs to be provided at a position corresponding to the second coil 230, which will be described later.

13 is a perspective view of the upper side elastic member 150, the lower side elastic member 160, the supporting member 220, the energizing member 154, the circuit board 250, the bobbin 110 and the first coil 120 according to the embodiment, Fig.

The length of the conducting member 154 may be shorter than that of the supporting member 220. [ That is, the first length L1 corresponding to the length of the energizing member 154, which is measured from the lower surface of the upper elastic member 150 to the upper surface of the lower elastic member 160, May be shorter than a second length corresponding to the length of the support member 220 measured to the upper surface of the circuit board 250.

This is because the lower end of the energizing member 154 is fixedly coupled to the lower elastic member 160 and the lower end of the support member 220 is inserted or coupled to the circuit board, This is because there is a separation distance.

Meanwhile, the first length L1 may be appropriately selected in consideration of the ease of assembling the lens driving device, the size of the bobbin 110, and the like. Accordingly, the first length L1 may be 0.1 mm to 1 mm, and more preferably 0.3 mm to 0.5 mm.

The upper elastic member 150 and the lower elastic member 160 are mechanically and electrically connected to each other by the energizing member 154 so that the lower elastic member 160 is structured such that the current is applied from the circuit board 250 .

When the lower elastic member 160 is directly connected to the support member 220, the lower elastic member 160 is disposed adjacent to the lower end of the support member 220, which is a portion fixed to the circuit board 250 or the second coil 230, When the bobbin 110 is driven in the second direction and the third direction, the support member 220, to which the upper elastic member 150 and the lower elastic member 160 are coupled, moves in the second direction, A strong driving force is required.

However, in the embodiment, the supporting member 220 is coupled to the upper elastic member 150, and the coupling portion thereof is also connected to the circuit board 250 or the second coil 230 from the lower end of the supporting member 220 Since the support member 220 is located at a relatively long distance, a driving force significantly smaller than that in the case where the lower elastic member 160 is directly connected to the support member 220 is sufficient for bending the support member 220 in the second direction and the third direction Do.

Therefore, in the embodiment, the driving force required when the bobbin 110 is driven in the second direction and the third direction is reduced due to the above-described structure.

Therefore, in the embodiment, the lens driving apparatus has the effect of performing the camera shake correction with a small driving force. In addition, since an excessive driving force is not applied to the supporting member 220, the durability of the lens driving device including the supporting member 220 can be enhanced.

14 shows an exploded perspective view of the base 210, the second coil 230, and the circuit board 250. Fig.

First, the base 210 of the second lens driving unit may have a substantially rectangular planar shape, as illustrated in Figs. 2 and 14. When the cover member 300 is adhered and fixed to the base 210, the step 211 may be formed as illustrated in FIG. 14 so that the adhesive can be applied. At this time, the step 211 can guide the cover member 300 coupled to the upper side, and the end of the cover member 300 can be coupled so as to be in surface contact. The end portions of the step 211 and the cover member 300 can be adhesively fixed and sealed with an adhesive or the like.

The base 210 may be disposed at a predetermined distance from the first lens driving unit. A receiving portion 255 having a size corresponding to the surface of the base 210 facing the portion of the circuit board 250 on which the terminal 251 is formed may be formed. The support portion 255 may be formed to have a constant cross-section from the outer surface of the base 210 without the step 211 so that the terminal surface 253 formed with the terminal 251 is supported.

The edge of the base 210 has a second groove 212. When the edge of the cover member 300 has a protruding shape, the protrusion of the cover member 300 can be fastened to the base 210 in the second groove 212.

In addition, second seating recesses 215-1 and 215-2, on which the second 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 seating recesses 215-1 and 215-2 are provided, and the second sensor 240 is disposed in each of the second seating recesses 215-1 and 215-2, It is possible to detect the degree of the movement of the movable member 140 in the second direction and the third direction. To this end, the second seating recesses 215-1 and 215-2 and the second seating recesses 215-1 and 215-2 are formed such that the angle formed by imaginary lines connecting the centers of the base 210 and the second seating recesses 215-1 and 215-2 is 90 °. ) Can be disposed.

At least one surface of the second seating grooves 215-1 and 215-2 may be formed with a tapered inclined surface (not shown). Epoxy injection for assembling the second sensor 240 can be performed more smoothly. Further, although no epoxy or the like may be injected into the second seating grooves 215-1 and 215-2, the second sensor 240 may be fixed by injecting epoxy or the like. The positions of the second seating grooves 215-1 and 215-2 may be disposed near the center or the center of the second coil 230. [ Alternatively, the center of the second coil 230 may be aligned with the center of the second sensor 240. According to the embodiment, the second seating recesses 215-1 and 215-2 may be provided at the side portions of the base 210. [

A groove portion is formed at a position corresponding to the step 211 of the cover member 300, and an adhesive or the like can be injected through the groove portion. At this time, the adhesive to be injected is set to have a low viscosity, so that the adhesive injected through the groove can penetrate the surface contact position of the step 211 and the end portion of the cover member 300. The adhesive member applied to the groove portion hits the gap between the facing surfaces of the cover member 300 and the base 210 through the groove portion so that the cover member 300 is coupled with the base 210 It can be configured to be sealed.

In addition, a seating part (not shown) on which a filter is installed may be formed on a 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. Also, as will be described later, a sensor substrate on which an image sensor is mounted may be coupled to a lower surface of the base 210 to form a camera module.

A plurality of support members 220 may be disposed on the second side 142 of the housing 140, respectively. For example, as described above, when the housing 140 has a polygonal plan shape, the number of the second side portions 142 of the housing 140 may be plural. If the inner bottom of the housing 140 has an octagonal bottom face, the plurality of support members 220 may be disposed on the second side 142 of the eight sides. For example, two support members 220 may be disposed on each of the four second side portions 142 so that a total of eight support members 220 may be provided.

Alternatively, only one support member 220 is disposed on each of the two second side portions 142 of the four second side portions 142 in the housing 140, and two support members 220 are provided on each of the remaining two second side portions 142 A supporting member 220 may be disposed, and a total of six supporting members 220 may be provided.

The support member 220 forms a path for transmitting power required by the first sensor 170 and the first coil 120 as described above and outputs a feedback signal output from the first sensor 170 to the circuit board 250, respectively.

In addition, since the support member 220 restores the original position after the housing 140 moves in the second and third directions in the first lens driving unit, the same number of support members 220 The elastic modulus K can be balanced. That is, when the housing 140 is moved in the second and / or third direction, which is a plane perpendicular to the optical axis, the support member 220 is moved in the direction in which the housing 140 moves, or in the longitudinal direction of the support member 220 It can be elastically deformed. Here, the longitudinal direction may be a direction connecting the upper end and the lower end of each wire of the support member 220. In this case, the housing 140 can move in the second and third directions, which are planes substantially perpendicular to the optical axis, with almost no change in position in the first direction parallel to the optical axis, thereby improving the accuracy of the camera shake correction. This utilizes the characteristic that the support member 220 can extend in the longitudinal direction.

For example, as illustrated in FIG. 12, the four first through fourth supporting members 220-1, 220-2, 220-3, and 220-4 may be formed of four sides of the housing 140 Two housings 140 can be supported at a distance from the base 210 by a predetermined distance.

Each of the first to fourth support members 220-1, 220-2, 220-3, and 220-4 according to the embodiment is disposed on the second side portion 142 of the housing 140, . However, it is not limited thereto. That is, the shapes and the numbers of the plurality of support members 220 may be determined to be symmetrical with respect to each other in a direction perpendicular to the first direction, for example, in the second and third directions. In consideration of the aforementioned elastic modulus, the number of the support members 220 may be eight, as described above.

In the above example, the support member 220 is implemented in the form of a suspension wire without a certain pattern, but the embodiment is not limited thereto. That is, according to another embodiment, the support member 200 may be formed in a plate shape having an elastic deformation portion (not shown).

Referring to FIG. 14, the second coil 230 may include a fifth through hole 230a passing through a corner of the circuit member 231. FIG. The support member 220 may be connected to the circuit board 250 through the fifth through hole 230a.

At this time, the support member 220 may be inserted into the fifth through hole 230a and fixedly coupled to the second coil 230 by soldering, a conductive adhesive, or the like. Meanwhile, as described above, the support member 220 may be fixedly coupled to the circuit board 250.

The second coil 230 may be disposed to face the magnet 130 fixed to the housing 140. For example, the second coil 230 may be disposed outside the magnet 130. Alternatively, the second coil 230 may be installed on the lower side of the magnet 130 with a predetermined distance therebetween.

According to the embodiment, as illustrated in FIG. 14, four second coils 230 may be provided on all four sides of the circuit board 250, but the present invention is not limited thereto. Only one for three directions, or two or more, may be installed. A circuit pattern may be formed on the circuit board 250 in the form of a second coil 230 and a separate second coil 230 may be disposed on the circuit board 250. However, Only a separate second coil 230 may be disposed on the circuit board 250 without forming a circuit pattern on the circuit board 250 in the form of the second coil 230. [ Alternatively, the second coil 230 may be formed by winding the wire in a donut shape, or may be electrically connected to the circuit board 250 by forming the second coil 230 in the form of an FP coil.

The circuit member 231 including the second coil 230 may be installed on the upper surface of the circuit board 250 disposed on the upper side of the base 210. However, the second coil 230 may be disposed in close contact with the base 210, may be spaced apart from the base 210, may be formed on a separate substrate, may be stacked on the circuit board 250 have.

The camera shake correction can be performed by moving the housing 140 in the second and / or third directions by the interaction of the magnet 130 and the second coil 230 arranged to face each other as described above. To this end, the first to fourth support members 220 described above can movably support the housing 140 in the second and third directions perpendicular to the first direction with respect to the base 210.

On the other hand, the second sensor 240 can sense the displacement of the first lens driving unit with respect to the base 210 in the second and third directions orthogonal to the optical axis. To this end, the second sensor 240 may be disposed on the center side of the second coil 230 with the circuit board 250 interposed therebetween to sense movement of the housing 140. That is, the second sensor 240 is not directly connected to the second coil 230. The second coil 240 is connected to the upper surface of the circuit board 250, the second sensor 240 is connected to the lower surface of the circuit board 250, Can be installed. According to the embodiment, the second sensor 240, the second coil 230, and the magnet 130 may be disposed on the same axis.

The second sensor 240 may be a hall sensor or any sensor capable of detecting a change in magnetic force. As shown in FIG. 14, the second sensor 240 may be provided at two sides of the base 210 disposed on the lower side of the circuit board 250, 215-2 formed in the base 210, as shown in FIG.

The circuit board 250 may include sixth through holes 250a1 and 250a2 through which the supporting member 220 can pass. The support member 220 may be electrically connected to a corresponding circuit pattern that may be disposed on the bottom surface of the circuit board 250 through the sixth through holes 250a1 and 250a2 of the circuit board 250 through soldering or the like.

The circuit board 250 may further include a seventh aperture 250b. The second upper support protrusions 217 and the seventh holes 250b of the base 210 may be coupled to each other as shown in FIG. 14 and may be fixed by thermal fusion or by an adhesive such as epoxy.

The circuit board 250 may further include a plurality of terminals 251. The circuit board 250 may have a bent terminal surface 253 formed thereon. According to the embodiment, at least one terminal 251 may be provided on one bent terminal surface 253 of the circuit board 250.

Power is supplied to the first and second coils 120 and 230 and the first and second sensors 170 and 240 by receiving external power through a plurality of terminals 251 provided on the terminal surface 253, Or may output the feedback signal output from the first sensor 170 to the outside. The number of terminals formed on the terminal surface 253 on which the terminal 251 is provided may be increased or decreased depending on the type of components to be controlled.

According to the embodiment, the circuit board 250 may be formed of FPCB, but the present invention is not limited thereto, and the terminal structure of the circuit board 250 may be formed directly on the surface of the base 210 using a surface electrode method or the like It is also possible.

As described above, the circuit board 250 supplies the necessary power (or current) at the first coil 120 and the first sensor 170, receives the feedback signal from the first sensor 170, So that the displacement of the rotor 110 can be adjusted.

Meanwhile, the lens driving apparatus according to the above-described embodiments can be used in various fields, for example, a camera module. For example, the camera module can 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 as described above, and the circuit board 250 can form the bottom surface of the camera module from the portion where the image sensor is mounted.

Further, the optical system may include at least one lens for transmitting an image to the image sensor. At this time, the optical system may be provided with an actuator module capable of performing autofocusing function and camera-shake correction function. Actuator modules that perform autofocusing can be configured in various ways, and a voice coil unit motor is generally used. The lens driving apparatus according to the above-described embodiment can perform the role of an actuator module that performs both the auto focusing function and the camera shake correction function.

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

A separate terminal member may be provided on the base 210 for electric connection with the circuit board 250, or a terminal may be integrally formed using a surface electrode or the like. Meanwhile, the base 210 may function as a sensor holder for protecting the image sensor. In this case, a protrusion may be formed downward along the side surface of the base 210. However, this is not essential, and although not shown, a separate sensor holder may be disposed below the base 210 to perform its role.

According to the above configuration, the magnet 130 can be commonly used to implement the auto focusing operation and the camera shake correction operation of the first and second lens driving units.

In the case of the lens driving apparatus and the camera module including the lens driving apparatus according to the embodiment described above, the first sensor 170 is disposed, coupled, or mounted on the housing 140 or the bobbin 110, It can be used as a magnet for a sensor or a separate magnet for a sensor. If the AF magnet 130 is shared by the sensor magnet or the sensor magnet is disposed so as not to interact with the AF magnet 130, the magnet for the sensor does not affect the AF magnet 130 The bobbin 110 is not tilted, the accuracy of the feedback signal is improved, the number of parts is not increased, and the weight of the housing 140 can be reduced to improve the response. Of course, the magnet for auto focusing and the magnet for correction of shake can be configured separately.

While only a few have been described above with respect to the embodiments, various other forms of implementation are possible. The technical contents of the embodiments described above may be combined in various forms other than mutually incompatible technologies, and may be implemented in a new embodiment through the same.

110: Bobbin
120: first coil
130: Magnet
140: housing
150: upper elastic member
154:
155: first protruding frame
160: Lower elastic member
165: second protruding frame
170: first sensor
180: sensor substrate
210: Base
220: Support member
230: second coil
240: second sensor
250: circuit board
300: cover member

Claims (25)

A bobbin having a first coil disposed on an outer circumferential surface thereof;
A first magnet facing the first coil;
A housing for supporting the first magnet;
Upper and lower elastic members coupled to the bobbin and the housing;
A base disposed at a predetermined distance from the housing;
A second coil disposed opposite to the first magnet;
A circuit board on which the second coil is mounted;
A plurality of support members movably supporting the housing in the second and third directions with respect to the base and connecting at least one of the upper or lower elastic members to the circuit board; And
And an energizing member for electrically connecting the upper and lower elastic members
And the lens driving device. The method according to claim 1,
The upper elastic member includes at least four first to fourth upper elastic members separated from each other,
Wherein at least two of the energizing members are electrically connected to at least two of the upper elastic members. 3. The method of claim 2,
Each of the first to fourth upper elastic members
A first inner frame coupled to the bobbin;
A first outer frame coupled to the housing and connected to the support member; And
And a first frame connecting portion connecting the first inner frame and the first outer frame. 3. The method of claim 2,
Wherein the lower elastic member includes at least two first and second lower elastic members separated from each other,
Wherein the at least two energizing members are connected to the first and second lower elastic members, respectively. 5. The method of claim 4,
And the first coil is connected to the plurality of support members via the first and second lower elastic members. 6. The method of claim 5,
Each of the first and second lower elastic members
At least one second inner frame coupled with the bobbin;
At least one second outer frame coupled with the housing; And
And a second frame connection portion connecting the at least one second inner frame and the at least one second outer frame. The method according to claim 6,
Wherein the at least one second outer frame comprises a plurality of second outer frames,
Each of the first and second lower elastic members
And a second 2-frame connection unit connecting the plurality of second outer frames. 8. The method of claim 7,
Wherein the at least four upper elastic members further comprise fifth and sixth upper elastic members separated from each other,
Each of the fifth and sixth upper elastic members
And a first protruding frame formed in a direction orthogonal to the first direction and connected to the energizing member. 9. The method of claim 8,
Each of the first and second lower elastic members
And a second protruding frame formed at a position opposite to the first protruding frame and connected to the energizing member. 10. The method of claim 9,
Wherein the current-
Wherein the upper end is fixedly engaged with the first projecting frame and the lower end is fixedly engaged with the second projecting frame. The method according to claim 1,
Wherein the support member comprises:
And the lower end is fixedly coupled to the circuit board. The method according to claim 1,
Wherein the support member comprises:
And a lower end fixedly coupled to the second coil. The method according to claim 1,
The first length corresponding to the length of the energizing member measured from the lower surface of the upper elastic member to the upper surface of the lower elastic member is smaller than the first length corresponding to the length of the support member measured from the lower surface of the upper elastic member to the upper surface of the circuit board 2 < / RTI > length. 14. The method of claim 13,
Wherein the first length is 0.3 mm to 0.5 mm. The method according to claim 1,
And a first sensor for sensing a displacement of the bobbin in a first direction,
The upper elastic member includes at least four first to fourth upper elastic members separated from each other,
Wherein the first sensor is connected to the plurality of support members via the first to fourth upper elastic members. 16. The method of claim 15,
Wherein the lower elastic member includes at least two first and second lower elastic members separated from each other,
And the first coil is connected to the plurality of support members via the first and second lower elastic members. 16. The method of claim 15,
Wherein the first sensor is disposed, coupled, or mounted on the bobbin and moves together. 18. The method of claim 17,
And a sensor substrate coupled to the bobbin, wherein the first sensor has a shape that can be arranged, combined, or mountable on the sensor substrate. The method according to claim 1,
A first sensor for sensing a displacement of the bobbin in a first direction; And
Further comprising a second magnet disposed to face the first sensor,
Wherein the first and second magnets are integral with each other. 20. The method of claim 19,
Wherein the first sensor and the first magnet are opposed to each other such that an imaginary central horizontal line passing through the center of the first sensor and perpendicular to the optical axis coincides with the top end of the first magnet. 21. The method of claim 20,
Wherein the bobbin moves up and down in the optical axis direction with respect to a point where the virtual center horizontal line coincides with the top end of the first magnet. The method according to claim 1,
A first sensor for sensing a displacement of the bobbin in a first direction; And
Further comprising a second magnet disposed to face the first sensor,
Wherein the first and second magnets are different. The method according to claim 1,
Wherein the shape and number of the plurality of support members are symmetrical to each other in the second and third directions. 24. The method of claim 23,
The lower elastic member includes at least four first through fourth lower elastic members separated from each other,
Wherein the first sensor is connected to the plurality of support members via the first through fourth lower elastic members. A lens driving device according to any one of claims 1 to 24. And
And an image sensor mounted on the circuit board.

Images