KR102641904B1 - Lens driving unit and camera module including the same - Google Patents

Abstract

The embodiment includes a housing including a seating portion, a bobbin disposed within the housing, a first coil disposed on the bobbin, a magnet disposed within the seating portion of the housing, and an adhesive disposed between the magnet and the seating portion of the housing, and the housing includes It includes an adhesive inlet formed in the lower part of the side of the seating portion, and the adhesive inlet is recessed from the lower surface of the housing in an upward direction parallel to the optical axis and exposes the seating portion to the outer surface of the housing.

Description

Lens driving unit and camera module including the same}

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

The content described in this section simply provides background information on the embodiments and does not constitute prior art.

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

In the case of camera modules mounted on small electronic products such as smartphones, each part that makes up the camera module is manufactured separately and assembled to complete the camera module.

However, when assembling a camera module, the lens driving device constituting the camera module is equipped with a magnet for driving the lens, and the magnet may be coupled to the housing with an adhesive or the like.

In the process of coupling a magnet to a housing, adhesive is first applied to the sides and top of the magnet seating area. However, it is generally difficult to accurately control the amount of adhesive applied and evenly apply it to the magnet seating area. This is because viscosity, etc. may vary depending on the type of adhesive, the influence of temperature during bonding, etc.

Therefore, if the amount of adhesive applied is small or the adhesive may not be spread evenly due to poor viscosity of the adhesive, poor adhesion of the magnet may occur. In this case, when a drop test is conducted to ensure product reliability, the magnet may separate from the housing, resulting in a product defect.

Meanwhile, after the magnet is attached to the housing, there is no way to accurately determine whether the adhesive has been applied evenly in a sufficient amount. Therefore, after first attaching the magnet to the housing, it is necessary to inject additional adhesive into the adhesive area to add sufficient adhesive to the adhesive area to increase the adhesive force between the magnet and the housing.

In addition, when attaching a magnet to a housing, excessive adhesive is applied to the magnet seating area, or even if an appropriate amount of adhesive is applied, the viscosity of the adhesive is lowered depending on the type of adhesive and the effect of temperature during the adhesive operation, causing fluidity. If it increases, the applied adhesive may flow down beyond the magnet seating area.

Adhesive that has left the magnet seating area and hardened to other parts of the lens driving device interferes with the behavior of other parts that make up the lens driving device, which may eventually cause malfunction or damage to the lens driving device. Protrusions that are formed differently from the design due to this hardened adhesive can cause significant defects in the auto-focusing function and camera shake correction function of the lens driving device.

If such hardened adhesive flows out during the magnet adhesion process, it can be scraped off with tweezers, a knife, etc. However, in this case, there is a problem that other foreign substances may appear in the lens driving device during the work process.

Therefore, the purpose of the embodiment is to provide a lens driving device that can increase the coupling force between the magnet and the housing and a camera module including the same.

The technical problems to be achieved by the embodiment are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below.

A lens driving device according to an embodiment includes a housing including a seating portion; a bobbin disposed within the housing; a first coil disposed on the bobbin; A magnet disposed within the seating portion of the housing; and an adhesive disposed between the magnet and the seating portion of the housing, wherein the housing includes an adhesive inlet formed in a lower portion of a side of the seating portion, and the adhesive inlet is parallel to the optical axis from the lower surface of the housing. It is depressed upward and the seating portion is exposed to the outer surface of the housing.

The adhesive inlet may expose the seating portion from the outer surface of the housing in a direction perpendicular to the optical axis. The seating portion may be a groove or a hole.

The seating portion may be located at a corner of the housing, and the adhesive inlet may be located at a lower portion of the corner of the housing.

The seating portion may include a groove, and the groove of the seating portion may include an upper surface facing the upper surface of the magnet; a first side opposite to the first side of the magnet; a second side connected to one side of the first side; a third side connected to the other side of the first side; and an opening disposed between one end of the second side that is not connected to the first side and one end of the third side that is not connected to the first side.

The adhesive inlet may be disposed on the first side of the groove. Alternatively, the adhesive inlet may be disposed on each of the first side and the second side of the groove. Alternatively, the adhesive inlet may be disposed on each of the first to third sides of the groove.

The adhesive may be disposed between the first to third sides of the groove and the magnet. The adhesive may be disposed between the upper surface of the seating portion and the magnet.

A lens driving device according to another embodiment includes a housing including a seating portion; a bobbin disposed within the housing; a first coil disposed on the bobbin; A magnet disposed within the seating portion of the housing; an adhesive disposed between the magnet and the seating portion of the housing; an elastic member coupled to the bobbin and the housing; a second coil disposed below the housing and facing the magnet; a printed circuit board disposed below the second coil; and a support member coupled to the elastic member and electrically connected to the printed circuit board, wherein the housing includes an adhesive inlet formed in a lower portion of a side surface of the seating portion, and the adhesive inlet is connected to the optical axis from the lower surface of the housing. It is depressed in an upward direction parallel to and exposes the seating portion to the outer surface of the housing.

The seating portion may be located at a corner of the housing, and the adhesive inlet may be disposed at a lower portion of the corner of the housing.

The lens driving device includes a cover member accommodating the housing; And it may include a base disposed below the printed circuit board. The printed circuit board may include at least one terminal portion bent to an outer surface of the base.

The seating portion includes a groove, and the groove of the seating portion includes an upper surface facing the upper surface of the magnet; a first side opposite to the first side of the magnet; a second side connected to one side of the first side; a third side connected to the other side of the first side; and an opening disposed between one end of the second side that is not connected to the first side and one end of the third side that is not connected to the first side. The housing may include at least one first flow restricting portion formed on the upper surface of the groove of the seating portion, and the at least one first flow restricting portion may be formed at an internal location spaced apart from the opening of the seating portion. .

The housing includes a bobbin seating portion formed on an upper portion of the seating portion to seat a portion of the bobbin; And it may include a second flow restriction portion formed at a portion where the bobbin seating portion and the inner surface of the housing meet in the first direction.

The seating portion may be located at each of the four corners of the housing, the magnet includes four magnet units, and each of the four magnet units is located at a corresponding one of the four corners of the housing. It may be placed within the seating portion located therein.

The lens driving device may include two Hall sensors disposed on the base and a detection sensor that detects movement of the housing.

In an embodiment, the adhesive inlet is formed so that the outer surface of the housing and the side of the first magnet seating portion communicate with each other, so that the adhesive strength between the first magnet and the housing can be increased by additionally injecting adhesive into the adhesive area through the adhesive inlet. There is.

Additionally, by forming a recessed first flow restriction portion on the upper surface of the first magnet seating portion, the adhesive can be prevented from flowing out of the first magnet seating portion. Accordingly, the generation of adhesive that flows out of the first magnet seating portion and hardens is blocked, which has the effect of preventing defects related to the auto-focusing function, camera shake correction function, and other operations of the lens driving device due to the protruding shape of the hardened adhesive.

In addition, the second flow limiter prevents the adhesive flowing down from the first magnet seating portion from flowing into the bobbin seating portion and hardening or forming a protrusion with hardened adhesive at the end of the lower surface of the bobbin seating portion, thereby preventing the bobbin and, by extension, the entire lens driving device from forming. It is effective in preventing malfunctions.

1 is a perspective view schematically showing a lens driving device according to an embodiment.
Figure 2 is an exploded perspective view showing a lens driving device according to an embodiment.
Figure 3 is a plan view showing an upper elastic member according to one embodiment.
Figure 4 is a plan view showing a lower elastic member according to one embodiment.
Figure 5 is a view with the cover member in Figure 1 removed.
Figure 6 is a perspective view of a bobbin according to one embodiment.
Figure 7 is a front view showing a support member according to one embodiment.
Figure 8 is a front view showing a support member according to another embodiment.
Figure 9 is an exploded perspective view showing the base, printed circuit board, and second coil according to one embodiment.
Figure 10 is a perspective view showing a housing according to one embodiment.
Figure 11 is a rear perspective view showing a housing according to one embodiment.
FIG. 12 is a diagram in which the z-axis direction is rotated by 180° in FIG. 11.
Figures 13 and 14 are enlarged views of part A of Figure 12.
Figures 15 and 16 are diagrams for explaining a second flow restriction unit according to an embodiment.
Figure 17 is a diagram showing an adhesive inlet according to one embodiment.
Figure 18 is a view showing an adhesive inlet according to another embodiment.
Figure 19 is a diagram for explaining a second flow restriction unit according to another embodiment.

Hereinafter, the embodiment will be described in detail with reference to the attached drawings. Since the embodiments can be subject to various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the embodiment to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the embodiment. In this process, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Terms such as “first”, “second”, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. Additionally, terms specifically defined in consideration of the configuration and operation of the embodiment are only for explaining the embodiment and do not limit the scope of the embodiment.

In the description of the embodiment, in the case where each element is described as being formed "on or under", ) includes two elements that are in direct contact with each other or one or more other elements that are formed (indirectly) between the two elements. Additionally, when expressed as “up” or “on or under,” it can include not only the upward direction but also the downward direction based on one element.

In addition, relational terms such as "top/top/top" and "bottom/bottom/bottom" used below do not necessarily require or imply any physical or logical relationship or order between such entities or elements, It may be used only to distinguish one entity or element from another entity or element.

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

1 is a perspective view schematically showing a lens driving device according to an embodiment. Figure 2 is an exploded perspective view showing a lens driving device according to an embodiment. Figure 3 is a plan view showing the upper elastic member 150 according to one embodiment. Figure 4 is a plan view showing the lower elastic member 160 according to one embodiment. FIG. 5 is a view with the cover member 300 removed from FIG. 1.

An image stabilization device applied to small camera modules of mobile devices such as smartphones or tablet PCs is used to prevent the outline of the captured image from being formed clearly due to vibration caused by the user's hand shaking when shooting still images. It means a configured device. Additionally, the auto focusing device is a device that automatically focuses the image of the subject onto the image sensor (not shown). Such hand shake correction devices and auto focusing devices can be configured in various ways. In the embodiment, an optical module composed of a plurality of lenses is moved in a first direction or moved against a plane perpendicular to the first direction to prevent hand shake. Compensation operations and/or auto-focusing operations may be performed.

As shown in Figures 1 and 2, the lens driving device according to the embodiment may include a movable part 100. At this time, the movable part 100 may perform the functions of auto-focusing and camera shake correction of the lens.

As shown in FIG. 2, the movable part 100 includes a bobbin 110, a first coil 120, a first magnet 130, a housing 140, an upper elastic member 150, and a lower elastic member 160. may include.

The bobbin 110 is provided with a first coil 120 disposed inside the first magnet 130 on its outer peripheral surface, and is subject to electromagnetic interaction between the first magnet 130 and the first coil 120. It can be installed in the internal space of the housing 140 to be movable back and forth in the first direction. A first coil 120 may be installed on the outer peripheral surface of the bobbin 110 to enable electromagnetic interaction with the first magnet 130.

In addition, the bobbin 110 is elastically supported by the upper and lower elastic members 150 and 160, and can move in the first direction to perform an auto-focusing function.

The bobbin 110 may include a lens barrel (not shown) in which at least one lens is installed. The lens barrel can be coupled to the inside of the bobbin 110 in various ways.

For example, a female thread may be formed on the inner peripheral surface of the bobbin 110, and a male thread corresponding to the thread may be formed on the outer peripheral surface of the lens barrel, and the lens barrel may be coupled to the bobbin 110 by screwing them together. However, this is not limited, and the lens barrel may be directly fixed to the inside of the bobbin 110 using a method other than screwing, without forming a thread on the inner peripheral surface of the bobbin 110. Alternatively, it is also possible for the one or more lenses to be formed integrally with the bobbin 110 without a lens barrel.

The lens coupled to the lens barrel may be composed of one piece, or two or more lenses may be configured to form an optical system.

The auto-focusing function is controlled according to the direction of the current, and the auto-focusing function may be implemented by moving the bobbin 110 in the first direction. For example, when a forward current is applied, the bobbin 110 may move upward from the initial position, and when a reverse current is applied, the bobbin 110 may move downward from the initial position. Alternatively, the amount of one-way current can be adjusted to increase or decrease the moving distance in one direction from the initial position.

A plurality of upper support protrusions (113, see FIG. 5) and lower support protrusions (not shown) may be formed to protrude from the upper and lower surfaces of the bobbin 110. The upper support protrusion 113 may be provided in a cylindrical or prismatic shape, and may couple and secure the inner frame 151 of the upper elastic member 150 and the bobbin 110.

According to the embodiment, the first through hole 151a may be formed at a position corresponding to the upper support protrusion 113 of the inner frame 151.

At this time, the upper support protrusion 113 and the first through hole 151a may be fixed by heat fusion or may be fixed with an adhesive member such as epoxy. Additionally, a plurality of upper support protrusions 113 may be provided. At this time, the distance between each upper support protrusion 113 can be appropriately arranged within a range that avoids interference with surrounding components.

That is, each of the upper support protrusions 113 may be arranged symmetrically at regular intervals with respect to the center of the bobbin 110, and although their spacing is not constant, with respect to a specific imaginary line passing through the center of the bobbin 110. It may also be formed to be symmetrical.

The lower support protrusion may be provided in a cylindrical or prismatic shape like the above-mentioned upper support protrusion 113, and can couple and fix the inner frame 161 of the lower elastic member 160 and the bobbin 110.

According to the embodiment, the second through hole 161a may be formed at a position corresponding to the lower support protrusion of the inner frame 161. At this time, the lower support protrusion and the second through hole 161a may be fixed by heat fusion or may be fixed with an adhesive member such as epoxy.

At this time, the distance between each lower support protrusion can be appropriately arranged within a range to avoid interference with surrounding components. That is, each lower support protrusion may be arranged symmetrically at regular intervals with respect to the center of the bobbin 110.

As shown in FIGS. 3 and 4, the upper elastic member 150 and the lower elastic member 160 can elastically support the upward and/or downward motion of the bobbin 110 in the first direction. The upper elastic member 150 and the lower elastic member 160 may be provided as leaf springs.

The upper elastic member 150 may be provided on the upper side of the bobbin 110, the inner frame 151 may be coupled to the bobbin 110, and the outer frame 152 may be coupled to the housing 140. The lower elastic member 160 is provided on the lower side of the bobbin 110, the inner frame 161 is coupled to the bobbin 110, and the outer frame 162 is coupled to the housing 140.

The upper elastic member 150 and the lower elastic member 160 are inner frames 151 and 161 coupled to the bobbin 110, and outer frames 152 and 162 and inner frames 151 coupled to the housing 140. ) It may include connecting members 153 and 163 that connect 161 and the outer frames 152 and 162.

The connecting members 153 and 163 may be bent at least once to form a pattern of a certain shape. The bobbin 110 can be elastically supported in its upward and/or downward motion in the first direction through a change in position and slight deformation of the connecting members 153 and 163.

According to the embodiment, as shown in FIG. 3, the upper elastic member 150 has a plurality of first through holes 152a in the outer frame 152 and a plurality of second through holes (152a) in the inner frame 151. 151a) can be provided.

The first through hole 152a is coupled to the upper frame support protrusion 144 (see FIG. 10) provided on the upper surface of the housing 140, and the second through hole 151a or groove is located at the upper part of the bobbin 110. It can be combined with the upper support protrusion (113, see Figure 6) provided on the surface. That is, the outer frame 152 is fixed and coupled to the housing 140 through the first through hole 152a, and the inner frame 151 is fixed to the bobbin 110 through the second through hole 151a or groove. and may be combined.

The connecting member 153 may connect the inner frame 151 and the outer frame 152 so that the inner frame 151 is elastically deformable within a predetermined range in a first direction with respect to the outer frame 152. there is.

At least one of the inner frame 151 and the outer frame 152 of the upper elastic member 150 has a terminal electrically connected to at least one of the coil 120 of the bobbin 110 and the printed circuit board 250. It may be provided at least one.

As shown in FIG. 4, the lower elastic member 160 has a plurality of insertion grooves 162a or holes in the outer frame 162 and a plurality of third through holes 161a or holes in the inner frame 161. A groove can be provided.

The insertion groove 162a or hole is coupled to the lower frame support protrusion 147 provided on the lower surface of the housing 140, and the third through hole 161a or groove is provided on the lower surface of the bobbin 110. It can be combined with the lower support protrusion.

That is, the outer frame 162 is fixed and coupled to the housing 140 through the insertion groove 162a or a hole, and the inner frame 161 is connected to the bobbin 110 through the third through hole 161a or groove. Can be fixed and combined.

*The connecting member 163 connects the inner frame 161 and the outer frame 162 so that the inner frame 161 is elastically deformable within a predetermined range in a first direction with respect to the outer frame 162. You can.

As shown in FIG. 3, the upper elastic member 150 may include a first upper elastic member 150a and a second upper elastic member 150b that are separated from each other. Through this two-part structure, the upper elastic member 150 can receive currents of different polarities or different power sources to the first upper elastic member 150a and the second upper elastic member 150b.

That is, after the inner frame 151 and the outer frame 152 are coupled to the bobbin 110 and the housing 140, respectively, the inner frame corresponds to both end lines of the coil 120 disposed on the bobbin 110. By providing a solder portion at the position of (151), currents of different polarities or different power sources can be applied by performing a conductive connection such as soldering at the solder portion.

In addition, the first upper elastic member 150a is electrically connected to one of the two end lines of the coil 120, and the other one of the two end lines of the coil 120 and the second upper elastic member 150b are electrically connected to each other. It is connected and can receive current and/or voltage from the outside.

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

As a modified example, the lower elastic member 160 may be configured as a two-part structure, and the upper elastic member 150 may be configured as an integrated structure.

At least one of the inner frame 161 and the outer frame 162 of the lower elastic member 160 may be electrically connected to at least one of the coil 120 of the bobbin 110 and the printed circuit board 250. . Additionally, the printed circuit board 250 may be provided with at least one first terminal portion 251 that can be electrically connected to the elastic members 150 and 160.

The printed circuit board 250 is coupled to the upper surface of the base 210, and as shown in FIGS. 2 and 5, a hole is formed at a corresponding position so that the seating groove 214 of the support member 220 is exposed. can be formed.

A surface on which the bent first terminal portion 251 is installed may be formed on the printed circuit board 250. In the embodiment, the printed circuit board 250 may form a surface on which one bent first terminal portion 251 is installed. A plurality of terminals are disposed on the surface where the first terminal portion 251 is installed, so that current can be supplied to the coil 120 by receiving an external power source. The number of terminals formed in the first terminal portion 251 may increase or decrease depending on the types of components that require control. Additionally, the printed circuit board 250 may have one more bent surface and may further include a terminal portion.

The base 210 is disposed below the bobbin 110 and, as shown in FIGS. 2 and 5, may be provided in a substantially square shape, and the support member 220 may be fixed to a straight surface. When fixing the cover member 300 by adhesive, a step 211 may be formed on the base 210 so that adhesive can be applied. At this time, the bottom surface of the step 211 may be in contact with the end of the cover member 300.

A support groove of a corresponding size may be formed on the surface of the base 210 facing the portion of the printed circuit board 250 where the first terminal portion 251 is formed. This support groove is formed to be concave inward at a certain depth from the outer peripheral surface of the base 210, so that the portion where the first terminal portion 251 is formed can be prevented from protruding outward or the amount of protrusion can be adjusted.

Meanwhile, the step 211 can guide the cover member 300 coupled to the upper side, and can also be coupled so that the end of the cover member 300 makes surface contact. At this time, the ends of the step 211 and the cover member 300 may be adhesively fixed and sealed using an adhesive or the like.

On the upper surface of the base 210, a support member 220 seating groove 214 into which the support member 220 can be inserted may be formed concavely at a corner. Adhesive may be applied to the seating groove 214 of the support member 220 to fix the support member 220 so that it does not move.

The end of the support member 220 may be inserted or placed into the seating groove 214 of the support member 220 and fixed through an adhesive or the like. A plurality of or at least one seating groove 214 may be formed on each straight surface on which the support member 220 is installed, and the shape of the seating groove 214 may be an approximately square groove.

In addition, as shown in FIGS. 2 and 5, two seating grooves 214 may be provided on each straight side in the embodiment. This may be increased or decreased depending on the shape of the support member 220, or one may be formed. and two or more may be formed.

The cover member 300 may be provided in a substantially box shape and may cover the movable part 100, the printed circuit board 250, and the base 210. At this time, as shown in FIG. 1, etc., the cover member 300 is formed with an escape portion or groove at a position corresponding to the step 211 of the base 210, and adhesives, etc. can be injected through this escape portion or groove. there is.

At this time, the viscosity of the injected adhesive is set to be low, so that the adhesive injected through the escape portion or groove may penetrate into the contact position between the step 211 and the end of the cover member 300. In this way, the adhesive member applied to the escape portion or groove portion fills the gap between the opposing surfaces of the cover member 300 and the base 210 through the escape portion or groove portion, thereby allowing the cover member 300 to adhere to the base. It can be configured to seal while being combined with (210).

Figure 6 is a perspective view of the bobbin 110 according to one embodiment. The bobbin 110 may include a first stopper 111 and/or a second stopper 112.

The first stopper 111 is such that when the bobbin 110 moves in the first direction for the auto focusing function, even if it moves beyond the specified range due to external shock, etc., the upper side of the body of the bobbin 110 is shown in FIG. 1. Direct collision with the inner surface of the cover member 300 can be prevented. Additionally, the first stopper 111 may also serve to guide the installation position of the upper elastic member 150.

According to the embodiment, as shown in FIG. 6, a plurality of first stoppers 111 may be formed to protrude upward to a first height h1, and at least four may be formed to protrude in the form of a polygonal pillar. there is. Additionally, the first stopper 111 may be provided in a symmetrical structure with respect to the center of the bobbin 110, or may be provided in an asymmetrical structure to exclude interference with other components as shown.

When the bobbin 110 moves in the first direction for the auto-focusing function, the second stopper 112 ensures that the bottom surface of the body of the bobbin 110 is shown in FIG. 2 even if it moves beyond the specified range due to external shock, etc. Direct collision with the upper surface of the base 210 and the circuit board 250 can be prevented.

According to an embodiment, the second stopper 112 may be formed to protrude in the circumferential direction on the upper side of the corner portion of the bobbin 110, and is located in the housing 140 at a position corresponding to the second stopper 112. A bobbin seating portion 146 (see FIG. 10) may be formed.

When the second stopper 112 and the lower surface (146a, see FIG. 10) of the bobbin seating portion 146 are in contact with each other in the initial position, one-way control is performed, that is, for example, current is supplied to the first coil 120. The auto-focusing function can be implemented through the operation of the bobbin 110 rising when the current is turned off and the bobbin 120 falling when the current is turned off.

If the initial position is configured so that the second stopper 112 and the lower surface 146a of the bobbin seating portion 146 are spaced apart by a certain distance, bidirectional control, that is, moves the bobbin 110 in the first direction according to the direction of the current. The auto-focusing function may be implemented through movement in the upper or lower direction. For example, when a forward current is applied, the bobbin 110 may move upward, and when a reverse current is applied, the bobbin 110 may move downward.

Meanwhile, the bobbin seating portion 146 of the housing 140 corresponding to the second stopper 112 is formed concavely, and as shown in FIG. 10, the first width (w1) of the second stopper 112 ), the second width w2 is formed to have a certain tolerance, so that the second stopper 112 can be prevented from rotating inside the bobbin seating portion 146. Accordingly, even if the bobbin 110 receives force in a direction that rotates about the z-axis rather than the first direction, the second stopper 112 can prevent the bobbin 110 from rotating.

Additionally, two winding protrusions 115 may be formed on the upper outer peripheral surface of the bobbin 110. Lines of sight and longitudinal lines, which are both ends of the first coil 120, may be wound around the winding protrusion 115, respectively. The end of the first coil 120 may be connected to the upper surface of the upper elastic member 150 on the upper surface of the bobbin 110 adjacent to the winding protrusion 115 by an electrically conductive connecting member such as solder. there is.

Additionally, a pair of the winding protrusions 115 may be arranged in left and right symmetrical positions with respect to the center of the bobbin 110, or two winding protrusions 115 may be arranged adjacent to each other, facing each other.

In addition, a locking protrusion 115a is formed at the end of the winding protrusion 115 to prevent the first coil 120 from being separated when the first coil 120 is wound, or the first coil 120 can guide the location of . As shown, the locking protrusion 115a may be formed so that the width of the winding protrusion 115 protruding from the outer peripheral surface of the bobbin 110 gradually increases, and may be formed in a stepped structure with steps at its ends.

Additionally, as shown in FIG. 6, at least one groove 116 may be formed next to the winding protrusion 115. The groove 116 may include a first groove 116a and/or a second groove 116b. The first groove 116a and/or the second groove 116b have a depth and width greater than the diameter of the first coil 120 so that the line of sight or longitudinal line of the first coil 120 can pass through. It can be formed as follows.

Therefore, the line of sight or longitudinal line of the first coil 120 passing through the first and/or second grooves 116a and 116b can be easily seated in the first and/or second grooves 116a and 116b. Also, the first coil 120 can pass through the groove 116 without interfering with the upper elastic member disposed above the groove 116.

Figure 7 is a front view showing the support member 220 according to one embodiment. Figure 8 is a front view showing a support member 220 according to another embodiment. Meanwhile, Figure 5 shows the arrangement of the support member 220 according to one embodiment.

The support member 220 is disposed on the side of the housing 140, the upper side is coupled to the housing 140, the lower side is coupled to the base 210, and the bobbin 110 and the housing 140 are connected to the housing 140. It can be supported to move in a second and third direction perpendicular to the first direction, and can also be electrically connected to the first coil 120.

As shown in FIG. 5, the support member 220 is individually disposed on the second surface 142 of the housing 140 and can support the housing 140 at a certain distance from the base 210. One end of the support member 220 may be inserted or placed in the seating groove 214 of the support member 220 and fixed with an adhesive member such as epoxy, and the other end may be fixed to the top of the side wall of the housing 140. .

Since the support members 220 according to the embodiment are disposed on the second surface 142 of the housing 140, a total of four support members 220 can be installed symmetrically. However, this is not limited, and it is possible to consist of 8 pieces, 2 for each straight side. Additionally, the support member 220 may be electrically connected to the upper elastic member 150, or may be electrically connected to the straight surface of the upper elastic member 150.

Specifically, the support member 220 may include a first coupling portion 221, a second coupling portion 224, a first elastic deformation portion 222, a second elastic deformation portion 223, and a connection portion 225. You can.

The first coupling portion 221 is connected to the upper part of the second surface 142 of the housing 140, and a concave groove is formed at a position corresponding to the coupling protrusion protruding from the second surface 142 to fit them. It can be fixed.

In addition, since the support member 220 is formed as a separate member from the upper elastic member 150, the first coupling portion 221 is formed by electrically connecting the support member 220 and the upper elastic member 150 through conductive adhesive, soldering, etc. It can be connected to . Accordingly, the upper elastic member 150 can apply current to the coil 120 through the electrically connected support member 220.

The second coupling portion 224 is a portion coupled to the base 210 and may be provided at the end of the support member 220. Additionally, the width of the first and second elastic deformation portions 222 and 223 It may be provided in a wider plate shape, but is not limited to this, and may also have a narrow or corresponding width.

According to the embodiment, the second coupling portion 224 is divided into two as shown in FIGS. 8 and 9, and each can be inserted or placed in the seating groove 214 of the support member 220 of the base 210. . The second coupling portion 224 may be fixedly coupled to the seating groove 214 of the support member 220 using an adhesive such as epoxy.

However, this is not limited, and the seating groove 214 of the support member 220 may be aligned with the second coupling portion 224 to fit and couple them. Alternatively, one or two or more second coupling portions 224 may be formed, and correspondingly, a seating groove 214 for the support member 220 may be formed in the base 210.

The elastic deformation parts 222 and 223 may be bent at least once to form a pattern of a certain shape. According to the embodiment, the elastic deformation part may include a first and/or second elastic deformation part 222 and 223, and the first elastic deformation part 222 is It extends from the first coupling portion 221 and is connected to the connecting portion 225. The second elastic deformation portion 223 extends from the first coupling portion 221 and is connected to the connecting portion 225.

Additionally, it may be formed with the connection portion 225 interposed in the middle, and may also be provided in shapes that correspond to each other. For example, as shown in FIGS. 7 and 8, when the first elastic deformation portion 222 is provided in a zigzag shape through two or more bends, the second elastic deformation portion 223 may also be formed to correspond to this. It is not limited, and only the first elastic deformation part 222 may be provided, or the second elastic deformation part 223 may be provided in a different shape.

The above is only an example, and it is also possible to configure it to have various patterns such as zigzag shapes. At this time, the first and second elastic deformation parts 222 and 223 may be configured as one piece without distinguishing between them, and it is also possible to configure them only in the form of a suspension wire without such a pattern.

According to an embodiment, the straight portions of the first and second elastic deformation parts 222 and 223 may be formed to be approximately parallel to a plane perpendicular to the first direction.

The elastic deformation parts 222 and 223 are formed in the direction in which the housing 140 moves or in the longitudinal direction of the support member 220 when the housing 140 moves in the second and/or third directions perpendicular to the first direction. It can be slightly elastically deformed.

Then, the housing 140 can move substantially in the second and third directions with almost no change in position with respect to the first direction, thereby improving the accuracy of hand shake correction. This takes advantage of the property that the elastic deformation parts 222 and 223 can be stretched in the longitudinal direction. Here, the longitudinal direction may be a direction connecting the first and second coupling portions 221 and 224.

The connection portion 225 connects the first elastic deformation portion 222 and the second elastic deformation portion 223 to each other and may be provided as a pair arranged to be symmetrical to each other. The connection portion 225 may be disposed in the middle of the elastic deformation portions 222 and 223 as described above, but is not limited thereto, and may be disposed connected to one elastic deformation portion.

In the case of the embodiment, the first and second elastic deformation parts 222 and 223 are each provided as a pair, but the first and second coupling parts 221 and 224 are formed as one body, and each pair of first and second elastic deformation parts 222 and 223 are provided as a pair. And the second elastic deformation parts 222 and 223 can be fixed to the housing 140 and the base 210 at the same time.

Figure 9 is an exploded perspective view showing the base 210, the printed circuit board 250, and the second coil 230 according to one embodiment. The lens driving device may further include a second coil 230 and a position detection sensor 240.

The second coil 230 may move the housing 140 in the second and/or third directions through electromagnetic interaction with the first magnet 130 to perform hand shake correction. Therefore, the first magnet 130 needs to be installed at a location corresponding to the second coil 230.

The second coil 230 may be arranged to face the first magnet 130 fixed to the housing 140. As an example, the second coil 230 may be disposed outside the first magnet 130. Alternatively, the second coil 230 may be installed below the first magnet 130 at a certain distance apart.

According to the embodiment, a total of four second coils 230 may be installed at the four corners of the printed circuit board 250, but this is not limited, one for the second direction and one for the third direction. It is possible for only 2, etc. to be installed, or 4 or more can be installed.

In the case of the embodiment, a circuit pattern is formed in the shape of a second coil 230 on the printed circuit board 250, and additionally, a separate second coil 230 may be placed on the printed circuit board 250, but it is limited to this. This does not happen, and only a separate second coil 230 may be disposed on the printed circuit board 250 without forming a circuit pattern in the shape of the second coil 230 on the printed circuit board 250.

Alternatively, it is also possible to configure the second coil 230 by winding a wire in a donut shape, or by forming the second coil 230 in the form of an FP coil and electrically connecting it to the printed circuit board 250.

The circuit member 231 including the second coil 230 may be installed on the upper surface of the printed circuit board 250 disposed on the upper side of the base 210. However, this is not limited, and the second coil 230 may be placed in close contact with the base 210, or may be placed at a certain distance apart, and may be formed on a separate board and attached to the printed circuit board 250. Laminated connections are also possible.

The detection sensor 240 is disposed at the center of the second coil 230 and can detect the movement of the housing 140. At this time, the detection sensor 240 can basically detect movement of the housing 140 in the first direction, and in some cases, may be provided to detect movement of the housing 140 in the second and third directions.

The detection sensor 240 may be provided as a Hall sensor, or any other sensor that can detect changes in magnetic force may be used. As shown in FIG. 9, a total of two detection sensors 240 can be installed at the corners of the base 210 disposed on the lower side of the printed circuit board 250, and the mounted detection sensors 240 are It can be inserted into the detection sensor seating groove 215 formed in the base 210. The lower surface of the printed circuit board 240 may be opposite to the surface on which the second coil 230 is disposed.

Meanwhile, the detection sensor 240 may be arranged at a certain distance apart from the lower side of the second coil 230 with the printed circuit board 250 in between. That is, the detection sensor 240 is not directly connected to the second coil 230, and the second coil 230 is located on the upper surface and the detection sensor 240 is located on the lower surface based on the printed circuit board 250. can be installed.

Figure 10 is a perspective view showing the housing 140 according to one embodiment. Figure 11 is a rear perspective view showing the housing 140 according to one embodiment.

The housing 140 has the shape of a hollow pillar supporting the first magnet 130 and may be formed in an approximately square shape. According to the embodiment, it may be formed in an approximately octagonal shape as shown in FIGS. 10 and 11. You can. At this time, the housing 140 may include a first surface 141 and a second surface 142. The first surface 141 may be a surface on which the first magnet 130 is installed, and the second surface 142 may be a surface on which the support member 220 is disposed.

The first surface 141 may be formed at a corner, and according to the embodiment, it may be formed in an area corresponding to the first magnet 130 or larger than that. At this time, the first magnet 130 may be fixed to the first magnet 130 seating portion 141a formed on the inner surface of the first surface 141.

The seating portion 141a of the first magnet 130 may be formed with a groove corresponding to the size of the first magnet 130, and faces the first magnet 130 on at least three sides, that is, both sides and the top surface. It can be placed to see.

Meanwhile, the first magnet 130 may be fixed to the first magnet 130 seating portion 141a with adhesive, but this is not limited, and an adhesive member such as double-sided tape may be used. Alternatively, instead of forming the first magnet 130 seating portion 141a as a concave groove as shown in FIG. 4, it is also possible to form it as a mounting hole into which a part of the first magnet 130 can be exposed or inserted.

A plurality of third stoppers 143 may be protruding from the upper surface of the housing 140. The third stopper 143 may restrict upward movement of the housing 140.

In addition, the third stopper 143 may also serve to guide the installation position of the upper elastic member 150. For this purpose, as shown in FIG. 3, the third stopper 143 of the upper elastic member 150 A guide groove 155 of a corresponding shape may be formed at a position corresponding to the stopper 143.

Meanwhile, the first surface 141 may be arranged parallel to the side of the cover member 300, but is not limited thereto. In addition, the first surface 141 has a surface larger than the second surface 142. It can be formed to have.

Additionally, as shown in FIGS. 10 and 11 , an escape groove 142a having a certain depth may be formed concavely on the second surface 142 . In an embodiment, the lower surface of the escape groove 142a may form an open opening. However, it is not limited to this, and the upper surface of the escape groove 142a may form an open opening, or both the upper and lower surfaces may form an open opening.

By providing the escape groove 142a, when the bobbin 110 moves in the first direction with respect to the housing 140, spatial interference between the connecting members 153 and 163 and the bobbin 110 is eliminated, and the connecting member 153 )(163) can be more easily elastically deformed.

Additionally, the lower part of the escape groove 142a can prevent the second coupling portion 224 of the lower part of the support member 220 from interfering with the housing 140. Additionally, the upper side of the escape groove 142a may form a step portion 142b as shown in FIG. 11 to support a portion of the upper portion of the support member 220.

In addition, the location of the escape groove 142a may be placed on the side of the housing 140 as in the embodiment, but the location of the connection members 153 and 163 of the elastic members 150 and 160 and the support member 220 Depending on the shape and/or location, it may be placed at a corner of the housing 140.

Additionally, a plurality of upper frame support protrusions 144 to which the outer frame 152 of the upper elastic member 150 is coupled may be protrudingly formed on the upper side of the housing 140. At this time, the number of upper frame support protrusions 144 may be greater than the number of upper support protrusions 113 described above. This is because the length of the outer frame 152 is longer than the length of the inner frame 151.

Meanwhile, a third through hole 152a of a corresponding shape may be formed in the outer frame 152 corresponding to the upper frame support protrusion 144, and may be fixed there with adhesive or heat fusion.

Additionally, as shown in FIG. 11 , a plurality of lower frame support protrusions 145 to which the outer frame 162 of the lower elastic member 160 is coupled may be formed to protrude on the lower side of the housing 140. At this time, the number of lower frame support protrusions 145 may be greater than the number of lower support protrusions described above. This is because the length of the outer frame 162 of the lower elastic member 160 is longer than the length of the inner frame 161.

Meanwhile, a fourth through hole 162a of a corresponding shape may be formed in the outer frame 162 corresponding to the lower frame support protrusion 145, and may be fixed there with adhesive or heat fusion.

Additionally, a fourth stopper 147 may be protruding from the lower side of the housing 140. The fourth stopper 147 may limit the downward movement distance of the housing 140. In this case, the fourth stopper 147 can prevent the bottom surface of the housing 140 from colliding with the base 210 and/or the printed circuit board 250.

Additionally, the fourth stopper 147 may maintain a certain distance from the base 210 and/or the printed circuit board 250 during the initial state and normal operation. Through this configuration, the housing 140 is spaced apart from the base 210 at the bottom and the cover member 300 at the top, so that the height in the first direction can be maintained by the support member 220 without vertical interference. . Accordingly, the housing 140 may perform a shifting operation in the second and third directions perpendicular to the first direction.

FIG. 12 is a diagram in which the z-axis direction is rotated by 180° in FIG. 11. When the first magnet 130 is coupled to the first magnet 130 seating portion 141a using adhesive (g), unlike shown in FIGS. 1 and 2, the z-axis direction, that is, the first direction, is downward. The housing 140 can be installed on a workbench and joined. Since the purpose of the embodiment is to solve the case where the adhesive (g) is insufficient or excessively applied to the seating portion 141a of the first magnet 130 during this coupling operation, to clearly explain this, the following is shown in FIG. 12. The drawing is shown with the first direction facing downward.

As shown in FIG. 12, the housing 140 has an outer surface of the housing 140 of the first magnet 130 seating portion 141a and a side surface (p1) of the first magnet 130 seating portion 141a. ) may be formed with an adhesive (g) inlet (141b) that communicates with each other.

At this time, as shown in FIG. 12, the adhesive (g) inlet 141b may have a groove formed at a corner of the lower part of the housing 140 by recessing a portion of the lower surface of the housing 140. However, this is only an example, and the adhesive (g) inlet 141b has a hole shape in which the outer surface of the housing 140 and the side surface (p1) of the seating portion 141a of the first magnet 130 communicate with each other. It may be formed as In this case, as shown in FIG. 12, the hole may have a shape in which a portion of the side surface of the hole is open.

However, it is appropriate that the adhesive (g) inlet (141b) is formed at the lower part of the side (p1) of the seating portion (141a) of the first magnet (130). When combining the first magnet 130, the housing 140 is placed upside down as shown in FIG. 12, unlike in FIGS. 1 and 2, so that the adhesive (g) flows in through the inlet 141b. This is because the adhesive (g) flows from the lower side to the upper side of the seating portion 141a of the first magnet 130 under the influence of gravity.

Specifically, for example, the first magnet 130 is provided in a trapezoidal shape, and the seating portion 141a of the first magnet 130 is located at a corner of the housing 140. 130), and the side surface (p1) of the seating portion (141a) of the first magnet (130) is a first side (p1-1) corresponding to the upper side of the trapezoid, and the first It may be provided with a second side (p1-2) connected to both ends of the side (p1-1).

At this time, the adhesive (g) inlet 141b may be formed on the first side (p1-1) and/or the second side (p1-2). Specific examples of the adhesive (g) inlet 141b will be described later.

In the operation of coupling the first magnet 130 to the housing 140, adhesive (g) is first applied to the side (p1) and top surface (p2) of the seating portion (141a) of the first magnet (130). It is generally difficult to accurately control the application amount and evenly apply it to the seating portion 141a of the first magnet 130. This is because viscosity, etc. may vary depending on the type of adhesive (g), the influence of temperature during bonding work, etc.

Therefore, if the amount of adhesive (g) applied is small or the adhesive (g) may not be spread evenly due to poor viscosity of the adhesive (g), adhesion failure of the first magnet 130 may occur. In this case, when a drop test is performed to ensure product reliability, the first magnet 130 may separate from the housing 140, resulting in a product defect.

Meanwhile, after the first magnet 130 is attached to the housing 140, there is no way to accurately determine whether the adhesive (g) has been applied evenly in a sufficient amount. Therefore, after first attaching the first magnet 130 to the housing 140, additional adhesive (g) is injected into the adhesive area so that sufficient adhesive (g) is added to the adhesive area to attach the first magnet 130 and the housing 140. ) It is necessary to increase the adhesion between the two.

To this end, after first attaching the first magnet 130 to the housing 140, the adhesive (g) inlet 141b can be formed to additionally supply the adhesive (g) to the adhesive area.

At this time, when the adhesive (g) is injected with the syringe (n) through the adhesive (g) inlet (141b), the adhesive (g) coming out from the tip of the injection needle is attached to the adhesive area, that is, the first magnet 130 and the first magnet ( 130) At the time of initial adhesion between the seating portions 141a, the adhesive (g) may penetrate into the unapplied area to strengthen the adhesive force between the first magnet 130 and the housing 140.

In the embodiment, the adhesive (g) inlet 141b is formed so that the outer surface of the housing 140 and the side (p1) of the seating portion 141a of the first magnet 130 communicate with each other, and the adhesive (g) inlet ( There is an effect of increasing the adhesive strength between the first magnet 130 and the housing 140 by additionally injecting adhesive (g) into the adhesive area through 141b).

Meanwhile, at least one first flow restriction portion 141a-1 that restricts the flow of the adhesive g may be formed on the upper surface p2 of the seating portion 141a of the first magnet 130. At this time, the first flow limiting part 141a-1 will be provided in a recessed shape whose longitudinal direction is arranged parallel to the lower side of the trapezoid of the trapezoid-shaped first magnet 130 seating part 141a. You can.

When attaching the first magnet 130 to the housing 140, excessive adhesive (g) is applied to the seating portion 141a of the first magnet 130, or an appropriate amount of adhesive (g) is applied. Also, if the viscosity of the adhesive (g) is lowered and fluidity increases depending on the type of adhesive (g), the influence of temperature during bonding work, etc., the applied adhesive (g) moves beyond the seating portion (141a) of the first magnet (130). It can flow down.

The adhesive (g) that has left the seating portion (141a) of the first magnet (130) and hardened in other parts of the lens driving device interferes with the movement of other parts constituting the lens driving device, resulting in malfunction or damage to the lens driving device. can occur.

Protrusions formed differently from the design due to the hardened adhesive (g) may cause significant defects in the auto-focusing function and camera shake correction function of the lens driving device.

In order to prevent the adhesive (g) from flowing down, the first flow restriction portion (141a-1) may be formed on the upper surface (p2) of the seating portion (141a) of the first magnet (130). Additionally, a second flow restriction portion 146a-1, which will be described later, may be formed.

Figures 13 and 14 are enlarged views of part A of Figure 12. Although the second flow restriction unit 146a-1 is shown in FIG. 13, the first flow restriction unit 141a-1 is explained with reference to FIGS. 13 and 14, and the second flow restriction unit 146a-1 is shown in FIG. 15 and 16 will be described later. Meanwhile, in the embodiment, the first flow restriction unit 141a-1 and the second flow restriction unit 146a-1 may be provided selectively. That is, both the first flow restriction unit 141a-1 and the second flow restriction unit 146a-1 may be provided, or only one of them may be provided.

As shown in FIGS. 13 and 14, the first flow restriction portion 141a-1 is attached to the first magnet 130 seating portion 141a on the upper surface (p2) of the first magnet 130 seating portion 141a. ) The adhesive (g) flowing from the top surface (p2) or the side (p1) of the first magnet 130 seating portion 141a is placed near the open inner portion of the first magnet 130 seating portion 141a. It may be provided in a structure that prevents it from flowing out.

Specifically, as described above, the first flow restriction portion 141a-1 is a recessed portion whose longitudinal direction is arranged parallel to the lower side of the trapezoid of the trapezoid-shaped first magnet 130 seating portion 141a. It can be provided in any shape.

In the cross-sectional view of FIG. 13, the recessed cross-section of the first flow restriction portion 141a-1 is provided in a semicircular or U-shaped shape. However, as long as it can accommodate the adhesive (g) flowing in the recessed shape, the recessed shape can be varied without limitation. It can be formed into a shape.

In addition, as shown in FIG. 13, in one embodiment, the first flow restriction portion 141a-1 is provided as two parallel to each other in the longitudinal direction, but is not limited thereto. That is, the number of first flow restriction units 141a-1 may be one, or three or more may be provided.

The number of first flow restriction parts 141a-1 can be appropriately selected in consideration of the surface area of the upper surface (p2) of the first magnet 130 seating part 141a, the general amount of adhesive (g) to be applied, etc. In other words, as the surface area of the upper surface (p2) of the seating portion (141a) of the first magnet (130) and the amount of adhesive (g) increase, the number of first flow restriction portions (141a-1) can be selected to increase.

Meanwhile, in order to limit the flow of the adhesive (g), as shown in the cross-sectional view (b) of FIG. 13, a plurality of steps (s) are formed on the upper surface (p2) of the seating portion (141a) of the first magnet (130). You may. At this time, the plurality of steps (s) increase the length of the path through which the adhesive (g) flows on the upper surface (p2), so that the adhesive (g) does not flow out of the seating portion 141a of the first magnet 130 and settles in the seating portion 141a. It may play a role in keeping you in section 141a.

As shown in FIG. 13, in one embodiment, there are two steps (s), but the step is not limited thereto. That is, the number of steps s may be one, or three or more may be provided. In addition, the step (s) may be formed on the upper surface (p2) together with the first flow restricting portion (141a-1), and the step (s) may be formed without forming the first flow restricting portion (141a-1). ) may be formed on the upper surface (p2). At this time, in order to further increase the length of the flow path of the adhesive g, chamfering or other work may be performed on the step s to form an inclined surface similar to the second flow restriction portion 146a-1.

As shown in the cross-sectional view (a) of FIG. 14, the adhesive (g) flowing from the side (p1) or top surface (p2) of the first magnet 130 seating portion 141a is connected to the first magnet 130 seating portion 141a. It flows toward the open part of (141a), and is accommodated in the first first flow limiting part (141a-1) located on the far side from the open part, so that it cannot advance any further and eventually the first magnet (130) seating part. (141a) It does not flow out.

On the other hand, as shown in the cross-sectional view (b) of FIG. 14, when the amount of adhesive (g) applied is large or the viscosity of the adhesive (g) is low, the first flow restriction portion 141a-1 is exceeded. 1The magnet 130 can continue to move forward to the open portion of the seating portion 141a.

In this case, the adhesive (g) is accommodated in the second first flow restricting part (141a-1) located near the open area, so that it cannot advance any further and eventually does not flow out of the seating part (141a) of the first magnet (130). It won't happen.

As described above, considering the surface area of the upper surface (p2) of the first magnet 130 seating portion 141a, the general amount of adhesive (g) applied, etc., the number of first flow restriction portions 141a-1 is appropriately determined. If selected, the adhesive (g) can be effectively prevented from flowing out of the seating portion 141a of the first magnet 130.

In the embodiment, the adhesive (g) is formed on the upper surface (p2) of the first magnet 130 seating portion 141a by forming a recessed first flow restriction portion 141a-1 so that the adhesive g is attached to the first magnet 130 seating portion ( 141a) It can prevent it from flowing out.

Accordingly, the generation of adhesive (g) that flows out of the seating portion (141a) of the first magnet (130) and hardens is blocked, and the auto-focusing function of the lens driving device due to the protruding shape of the hardened adhesive (g), camera shake correction function, etc. It has the effect of preventing operational defects.

FIGS. 15 and 16 are diagrams for explaining the second flow restriction unit 146a-1 according to an embodiment. A bobbin 110 seating portion 146 on which a portion of the bobbin 110 is seated is formed on the upper side of the first magnet 130 seating portion 141a in the housing 140, and the bobbin 110 seating portion is formed in the housing 140. A second flow restriction portion 146a-1 that restricts the flow of the adhesive g may be formed at a portion where 146 and the inner surface of the housing 140 meet in the first direction.

Specifically, for example, the second flow restriction portion 146a-1 may be formed at a location where the lower surface 146a of the seating portion 146 of the bobbin 110 and the inner surface of the housing 140 meet. .

The second flow restriction unit 146a-1 may be provided to form an inclined surface when viewed in the first direction. At this time, in one embodiment, the second flow restriction portion 146a-1 may form the inclined surface through a chamfering operation.

A part of the bobbin 110, for example, the second stopper 112, as described above, may be seated on the bobbin 110 seating portion 146. At this time, the bobbin 110 seating portion 146 may serve to limit the movement range of the second stopper 112.

The second stopper 112 is not fixed to the bobbin 110 seating portion 146 and can move within the range of the volume formed by the bobbin 110 seating portion 146. Therefore, when the adhesive (g) flows from the seating portion 141a of the first magnet 130 and flows into the seating portion 146 of the bobbin 110 and hardens, the hardened protruding portion cannot move the second stopper 112. This may further limit the spatial range and cause malfunction of the lens driving device.

In addition, when the protruding portion where the adhesive (g) has hardened repeatedly collides with the second stopper (112), it may temporarily adhere to the adhesive (g) and the second stopper (112) due to the adhesive force of the adhesive (g). As a result, the protruding portion where the adhesive (g) is hardened can temporarily stop the movement of the second stopper 112, so the bobbin 110 including the second stopper 112, and further the entire lens driving device. It may cause malfunction.

As shown in FIG. 16, the second flow restriction portion 146a-1 is formed as an inclined surface to restrict the flow of the adhesive g. That is, in the case of a sharp edge where the second flow limiting portion 146a-1 is not formed, the adhesive (g) flows from the seating portion 141a of the first magnet 130 to the lower surface of the seating portion 146 of the bobbin 110. When it reaches the end of (146a), a portion of the adhesive (g) flowing down due to gravity may fall and penetrate into the inside of the bobbin 110 seating portion 146, and the housing 140 during the lens driving device assembly operation. When first combining the and bobbin 110, some of the flowing adhesive (g) may fall and harden on the second stopper 112 of the bobbin 110.

In addition, even if the adhesive (g) does not fall, a protruding portion can be formed in the first direction at the end of the lower surface (146a) of the bobbin 110 seating portion 146, and this protruding portion is also connected to the second stopper 112. It may cause malfunction.

However, when the second flow limiting part 146a-1 formed as an inclined surface is provided, when the flowing adhesive g reaches the upper end of the second flow limiting part 146a-1, the flow direction is changed to the above. It flows toward an inclined surface, and the adhesive (g) adheres to the inclined surface and does not flow down and does not form a protruding portion in the first direction.

As the width w3 of the second flow restriction portion 146a-1, that is, the width of the inclined surface in the cross-sectional views of FIGS. 15 and 16, becomes longer, the flow restriction effect of the adhesive g may increase. Therefore, it is appropriate that the width w3 of the second flow restriction portion 146a-1 be made as large as possible to allow space in the housing 140 and as long as it does not affect the operation of the entire lens driving device.

Figure 17 is a diagram showing an adhesive (g) inlet (141b) according to an embodiment. Figure 18 is a diagram showing an adhesive (g) inlet (141b) according to another embodiment.

As shown in FIG. 17, the adhesive (g) inlet 141b may be formed on the first side (p1-1). In this case, when additionally injecting the adhesive (g) into the adhesive area through the syringe (n), the adhesive (g) coming out of the tip of the injection needle is first applied to the first side (p1) of the seating portion (141a) of the first magnet (130). It penetrates into the adhesive portion located at -1), and then into the second side (p1-2) and top surface (p2) of the seating portion (141a) of the first magnet (130).

Meanwhile, as shown in FIG. 18, adhesive (g) inlets 141b may be formed on each of the second sides (p1-2). In this case, the adhesive (g) inlet (141b) may be formed on one of the two second sides (p1-2), but the adhesive (g) is evenly applied to the two second sides (p1-2). In order to achieve this, it is more appropriate to form an adhesive (g) inlet (141b) on each of the two second sides (p1-2).

In this case, when additionally injecting the adhesive (g) into the adhesive area through the syringe (n), the adhesive (g) coming out of the tip of the injection needle is first applied to the second side (p1) of the seating portion (141a) of the first magnet (130). It penetrates into the adhesive portion located at -2), and then into the first side (p1-1) and top surface (p2) of the seating portion (141a) of the first magnet (130).

Meanwhile, the embodiments shown in FIGS. 17 and 18 can also be combined. That is, the adhesive (g) inlet 141b can be formed on both the first side (p1-1) and the second side (p1-2). In this case, as above, an adhesive (g) inlet (141b) is provided on each of the two second sides (p1-2) to ensure that the adhesive (g) is evenly applied to the two second sides (p1-2). It is more appropriate to form Accordingly, in this embodiment, a total of three adhesive (g) inlets 141b can be formed.

Figure 19 is a diagram for explaining the second flow restriction unit 146a-1 according to another embodiment. As shown in FIG. 19, a plurality of steps (s) are formed at the area where the bobbin 110 seating portion 146 and the inner surface of the housing 140 meet in the first direction, and each step (s) s), the second flow restriction portions 146a-1 may be formed, respectively.

That is, a plurality of second flow restriction portions 146a-1 may be formed. Compared to the case of having one second flow limiting part 146a-1, the flow limiting effect of the adhesive (g) by the second flow limiting part 146a-1 can be increased when formed in plural. .

These plurality of second flow restriction parts 146a-1 are, for example, the upper surface (p2) of the first magnet 130 seating part 141a of the inner surface of the housing 140, the bobbin 110 seating part ( It can be formed by forming a plurality of steps (s) at the area where it meets the lower surface (146a) of 146) and performing a chamfering operation on each of the steps (s).

At this time, the number of second flow restriction units 146a-1 is disclosed as two in the embodiment, but it is not limited thereto. The number of second flow restrictors 146a-1 can be appropriately selected considering the space allowed in the housing 140 and the effect on the operation of the entire lens driving device.

Meanwhile, the second flow restriction portion 146a-1 may be formed on all or only a portion of the plurality of steps s. When the second flow restriction portion 146a-1 is formed only on some of the plurality of steps s, the adhesive g flows from the upper surface p2 and initially flows into the bobbin 110 seating portion 146. It is appropriate to form the second flow restriction portion 146a-1 at the portion of the step s directly connected to the inner surface of the housing 140.

In addition, only the plurality of steps s may be formed and no separate chamfering work, etc. may be performed on the steps s. In this case, the plurality of steps s may serve as second flow restrictions.

In the embodiment, the second flow limiting part 146a-1 is formed by allowing the adhesive (g) flowing down from the seating part 141a of the first magnet 130 to flow into the seating part 146 of the bobbin 110 and hardening it or the bobbin ( 110) By preventing the formation of a protrusion where the adhesive (g) has been hardened at the end of the lower surface (146a) of the seating portion (146), there is an effect of preventing malfunction of the bobbin (110) and, by extension, the entire lens driving device.

Meanwhile, the lens driving device according to the above-described embodiment can be used in various fields, for example, camera modules. For example, camera modules can be applied to mobile devices such as mobile phones.

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

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

Additionally, the optical system may include at least one lens that transmits an image to the image sensor. At this time, an actuator module capable of performing an auto-focusing function and an image stabilization function may be installed in the optical system. The actuator module that performs the auto-focusing function can be configured in various ways, and voice coil unit motors are commonly used. The lens driving device according to the above-described embodiment may function as an actuator module that performs both an auto-focusing function and an image stabilization function.

Additionally, the camera module may further include an infrared blocking filter (not shown). The infrared cut-off filter serves to block light in the infrared range from entering the image sensor. In this case, in the base 210 illustrated in FIG. 2, an infrared cut-off filter may be installed at a position corresponding to the image sensor and may be combined with a holder member (not shown). Additionally, the base 210 may support the lower side of the holder member.

A separate terminal member may be installed on the base 210 to conduct electricity with the printed circuit board 250, and it is also possible to form the terminal integrally using surface electrodes, etc. Meanwhile, the base 210 may function as a sensor holder that protects the image sensor. In this case, a protrusion may be formed in the downward direction along the side of the base 210. However, this is not an essential configuration, and although not shown, a separate sensor holder may be placed at the bottom of the base 210 to perform its role.

Although only a few examples have been described as described above in relation to the embodiments, various other forms of implementation are possible. The technical contents of the above-described embodiments can be combined in various forms unless they are incompatible technologies, and through this, can be implemented as a new embodiment.

110: bobbin 120: first coil
130: first magnet 140: housing
141a: First magnet seating portion 141a-1: First flow restriction portion
141b: Adhesive inlet 146: Bobbin seating portion
210: base 220: support member
230: second coil 300: cover member
g: glue n: syringe
p1: Side of the first magnet seating portion p1-1: First side
p1-2: Second side.

Claims (20)

A housing including a seating portion;
a bobbin disposed within the housing;
a first coil disposed on the bobbin;
A magnet disposed within the seating portion of the housing; and
Includes an adhesive disposed between the magnet and the seating portion of the housing,
The magnet has a first side facing the outer peripheral surface of the bobbin, a second side located opposite to the first side, a third side connecting one side of the first side and one side of the second side, and the first side. It includes a fourth side connecting the other side of the side and the other side of the second side,
The seating portion includes a first side facing the second side of the magnet, a second side facing the third side of the magnet, and a third side facing the fourth side of the magnet,
The housing includes an adhesive inlet formed in the seating portion,
The adhesive inlet includes a first adhesive inlet formed on the second side of the seating portion and a second adhesive inlet formed on the third side of the seating portion. According to paragraph 1,
The first adhesive inlet exposes a portion of the third side of the magnet, and the second adhesive inlet exposes a portion of the fourth side of the magnet. According to paragraph 1,
A lens driving device wherein the seating portion is a groove. According to paragraph 1,
The seating portion is located at a corner of the housing,
Each of the first and second adhesive inlets is disposed at a lower portion of the corner of the housing. According to paragraph 1,
A lens driving device wherein the seating portion includes an opening exposing the first side of the magnet. According to paragraph 1,
The housing includes a third adhesive inlet formed on the first side of the seating portion. According to paragraph 1,
The magnet includes an upper surface disposed on upper portions of the first to fourth side surfaces of the magnet and a lower surface disposed below the first to fourth side surfaces of the magnet. In clause 7,
The first and second adhesive inlets are disposed closer to the lower surface of the magnet than to the upper surface of the magnet. In clause 7,
The seating portion includes an upper surface facing the upper surface of the magnet,
The adhesive is disposed between the upper surface of the seating portion and the upper surface of the magnet,
A lens driving device wherein the upper surface of the magnet has a trapezoidal shape. According to paragraph 1,
The adhesive is disposed between the second side of the seating portion and the third side of the magnet and between the third side of the seating portion and the fourth side of the magnet. A housing including a seating portion;
a bobbin disposed within the housing;
a first coil disposed on the bobbin;
A magnet disposed within the seating portion of the housing;
an adhesive disposed between the magnet and the seating portion of the housing;
an elastic member coupled to the bobbin and the housing;
a second coil disposed below the housing and facing the magnet;
a printed circuit board disposed below the second coil; and
A support member coupled to the elastic member and electrically connected to the printed circuit board,
The magnet has a first side facing the outer peripheral surface of the bobbin, a second side located opposite to the first side, a third side connecting one side of the first side and one side of the second side, and the first side. It includes a fourth side connecting the other side of the side and the other side of the second side,
The seating portion includes a first side facing the second side of the magnet, a second side facing the third side of the magnet, and a third side facing the fourth side of the magnet,
The housing includes an adhesive inlet formed in the seating portion,
The adhesive inlet includes a first adhesive inlet formed on the second side of the seating portion and a second adhesive inlet formed on the third side of the seating portion. According to clause 11,
The seating portion is located at a corner of the housing,
The first adhesive inlet is formed at a lower portion of the second side of the seating portion,
The second adhesive inlet is a lens driving device formed in a lower portion of the third side of the seating portion. According to clause 11,
a cover member accommodating the housing; and
A lens driving device including a base disposed below the printed circuit board. According to clause 13,
A lens driving device wherein the printed circuit board includes at least one terminal portion bent to an outer surface of the base. According to clause 11,
A lens driving device wherein the seating portion includes an opening exposing the first side of the magnet. According to clause 15,
The magnet includes an upper surface disposed on upper portions of the first to fourth side surfaces of the magnet and a lower surface disposed below the first to fourth side surfaces of the magnet,
The seating portion includes an upper surface facing the upper surface of the magnet,
The housing includes at least one first flow restriction portion formed on the upper surface of the seating portion,
A lens driving device wherein the at least one first flow restriction portion is formed at an internal location spaced apart from the opening of the seating portion. According to clause 11,
The seating portion is located at each of the four corners of the housing,
The magnet is a lens driving device disposed in the seating portion located at each of the four corners of the housing. According to clause 13,
A lens driving device including two hall sensors disposed on the base and a detection sensor that detects movement of the housing. A housing including a seating portion;
a bobbin disposed within the housing;
a first coil disposed on the bobbin;
A magnet disposed within the seating portion of the housing;
an adhesive disposed between the magnet and the seating portion of the housing;
an elastic member coupled to the bobbin and the housing;
a second coil disposed below the housing and facing the magnet;
a printed circuit board disposed below the second coil; and
A support member coupled to the elastic member and electrically connected to the printed circuit board,
The housing includes an adhesive inlet formed in a lower portion of a side surface of the seating portion, and the adhesive inlet is recessed from a lower surface of the housing in an upward direction parallel to the optical axis and exposes the seating portion to an outer surface of the housing,
The housing is,
a bobbin seating portion formed on an upper portion of the seating portion to seat a portion of the bobbin; and
A lens driving device including a flow restriction portion formed at a portion where the bobbin seating portion and the inner surface of the housing meet in a first direction. lens;
A lens driving device according to any one of claims 1 to 19;
A camera module containing an image sensor.