KR102596539B1 - Lens moving apparatus and camera module including the same - Google Patents

Abstract

One embodiment of the lens driving device includes a bobbin installed to move in a first direction; A first coil provided on the outer peripheral surface of the bobbin; a housing inside which the bobbin is disposed; A first magnet coupled to the housing; an upper elastic member provided on an upper side of the bobbin and supporting the bobbin; a lower elastic member provided below the bobbin and supporting the bobbin; a support member disposed on a side of the housing and supporting movement of the housing in a second direction and/or a third direction; and a cover member partially disposed on an upper side of the support member, wherein the cover member may have an escape groove formed in a portion facing the support member in the first direction.

Description

Lens moving apparatus and camera module including the same}

The embodiment relates to a lens driving device having a structure capable of effectively blocking the occurrence of an electrical short between a cover member and a conductive component, 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 a camera module mounted on a small electronic product such as a smartphone, it may include a lens driving device.

In the case of a lens driving device, it may include at least one lens, an auto-focusing device that focuses the lens in the optical axis direction, and an image stabilization device that prevents deterioration of image quality due to the user's hand shaking.

The lens driving device may be provided with a cover member that accommodates and protects each component. Meanwhile, the cover member may generally be made of a conductive material.

When an electrical short occurs due to contact between a cover member made of a conductive material and a conductive component accommodated therein, to which current is applied, or to which an electric signal is transmitted or received, the operation of the lens driving device, for example, an auto-focusing device. , it may adversely affect the operation of image stabilization devices, etc.

Therefore, a lens driving device and a camera module with a structure that can effectively block the occurrence of electrical shorts between the cover member and the conductive component are needed.
(Patent Document 1) WO 2015-102382 A1

Accordingly, the embodiment relates to a lens driving device having a structure capable of effectively blocking the occurrence of an electrical short between a cover member and a conductive component, 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.

One embodiment of the lens driving device includes a bobbin installed to move in a first direction; A first coil provided on the outer peripheral surface of the bobbin; a housing inside which the bobbin is disposed; A first magnet coupled to the housing; an upper elastic member provided on an upper side of the bobbin and supporting the bobbin; a lower elastic member provided below the bobbin and supporting the bobbin; a support member disposed on a side of the housing and supporting movement of the housing in a second direction and/or a third direction; and a cover member partially disposed on an upper side of the support member, wherein the cover member may have an escape groove formed in a portion facing the support member in the first direction.

One embodiment of the lens driving device includes a second coil disposed to face the first magnet; a base disposed below the bobbin; And it may further include a printed circuit board mounted on the base.

One embodiment of the lens driving device may further include a soldering portion that couples the upper part of the support member and the upper elastic member, and the upper end of the soldering portion may be spaced apart from the cover member in a first direction by the escape groove. there is.

One embodiment of the lens driving device may further include an insulating portion filled in the escape groove and formed of an electrically insulating material.

The escape groove may be formed by a portion of the cover member being depressed in a first direction.

The escape groove may be formed by rolling a portion of the cover member.

The escape groove may be formed so that one side of the cover member is recessed and the other side of the cover member protrudes.

The support members may be provided in the form of wires and may be arranged in plural numbers at corners of the housing.

The escape groove may be provided in plurality on the cover member at positions corresponding to the support member in a first direction.

The upper elastic member is coupled to the upper surface of the housing, and is provided with a soldering joint that is soldered to the upper part of the support member. The housing may be provided with a protrusion formed on the upper surface at a position adjacent to the soldering joint. .

The soldering joints may be provided as a pair spaced apart from each other, and the protrusions may be disposed between the pair of soldering joints.

The protrusion may prevent plastic deformation of the soldering joint.

Another embodiment of the lens driving device includes a bobbin installed to move in a first direction; A first coil installed on the outer peripheral surface of the bobbin; a housing inside which the bobbin is installed; A first magnet coupled to the housing; an upper elastic member provided on an upper side of the bobbin and supporting the bobbin; a lower elastic member provided below the bobbin and supporting the bobbin; a support member disposed on a side of the housing and supporting movement of the housing in a second direction and/or a third direction; and a cover member whose upper surface is disposed above the support member and where an escape groove is formed in a portion opposite to the support member in a first direction, wherein the upper elastic member is coupled to the upper surface of the housing, and the support member A soldering joint is provided that is soldered to the upper part of the member, and the housing may be provided with a protrusion formed on an upper surface at a position adjacent to the soldering joint.

One embodiment of the camera module may include the lens driving device.

In an embodiment, the escape groove formed in the cover member prevents an electrical short circuit between the support member and the cover member, preventing malfunction of the lens driving device and deterioration of image quality of captured images due to the short circuit.

In an embodiment, forming the protrusion on the housing can effectively prevent plastic deformation of the soldering joint that may occur when the upper elastic member is coupled to the housing.

Figure 1 is a perspective view 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 cross-sectional view showing an embodiment of part A of Figure 1.
Figure 4 is a partial plan view with the cover member removed from the lens driving device according to one embodiment.
Figure 5 is a bottom view showing a cover member according to one embodiment.
Figure 6 is a cross-sectional view showing another embodiment of part A of Figure 1.
Figure 7 is a cross-sectional view showing another embodiment of portion A of Figure 1.
Figure 8 is an enlarged view showing part B of Figure 4.
Figure 9 is a perspective view of Figure 8.

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. .

Figure 1 is a perspective view 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.

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, an auto-focusing device is a device that automatically focuses an image of a subject onto an image sensor (not shown). Such camera shake correction devices and auto-focusing devices can be configured in various ways. In the embodiment, the optical module composed of a plurality of lenses is moved in a first direction or by moving in a direction perpendicular to the first direction to correct camera shake. Motion and/or auto-focusing operations may be performed.

As shown in FIG. 2, the lens driving device 100 according to the embodiment may include a movable part and a fixed part. At this time, the movable part may perform the auto-focusing function of the lens. The movable part may include a bobbin 110 and a first coil 120, and the fixed part may include a first magnet 130, a housing 140, an upper elastic member 150, and a lower elastic member 160. there is. Hereinafter, the “first magnet 130” may be referred to as a “magnet.”

The bobbin 110 is provided inside the housing 140, and a first coil 120 disposed inside the first magnet 130 is provided on the outer peripheral surface, and the first magnet 130 and the first coil It can be installed to move back and forth in the first direction in the inner space of the housing 140 by electromagnetic interaction between the housings 120 . 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 and/or amount of 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 and lower support protrusions may be formed to protrude on the upper and lower surfaces of the bobbin 110. The upper support protrusion may be provided in a cylindrical or prismatic shape, and may be coupled to and fixed to the upper elastic member 150 by guiding the upper elastic member 150. The lower support protrusion may be provided in a cylindrical or prismatic shape like the above-described upper support protrusion, and may be coupled to and fixed to the lower elastic member 160 by guiding the lower elastic member 160.

At this time, holes and/or grooves corresponding to the upper support protrusions may be formed in the upper elastic member 150, and holes and/or grooves corresponding to the lower support protrusions may be formed in the lower elastic member 160. Each of the supporting protrusions and the holes and/or grooves may be fixedly coupled to each other by an adhesive member such as heat fusion or epoxy.

The housing 140 has the shape of a hollow pillar supporting the first magnet 130 and may be formed in a substantially square shape. The first magnet 130 may be coupled and disposed on the side surface of the housing 140. Additionally, as described above, a bobbin 110 that is guided by elastic members 150 and 160 and moves in the first direction may be disposed inside the housing 140.

The upper elastic member 150 may be provided on the upper side of the bobbin 110, and the lower elastic member 160 may be provided on the lower side of the bobbin 110. The upper elastic member 150 and the lower elastic member 160 are coupled to the housing 140 and the bobbin 110, and the upper elastic member 150 and the lower elastic member 160 are the first elastic members of the bobbin 110. It can flexibly support upward and/or downward motion in either direction. The upper elastic member 150 and the lower elastic member 160 may be provided as leaf springs.

As shown in FIG. 2, the upper elastic member 150 may be provided in plural pieces separated from each other. Through this multi-divided structure, each divided portion of the upper elastic member 150 can receive currents of different polarities or different power sources, or become a current transmission path. Additionally, the lower elastic member 160 may also have a multi-segment structure and be electrically connected to the upper elastic member 150.

Meanwhile, the upper elastic member 150, lower elastic member 160, bobbin 110, and housing 140 may be assembled through heat fusion and/or bonding using an adhesive, etc.

The base 210 is disposed below the bobbin 110 and may be provided in a substantially square shape, and the printed circuit board 250 may be disposed or seated thereon.

A support groove of a corresponding size may be formed on the surface of the base 210 facing the portion where the terminal surface 253 of the printed circuit board 250 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 terminal surface 253 is formed can be prevented from protruding outward or the amount of protrusion can be adjusted.

The support member 220 is disposed on the side of the housing 140 and spaced apart from the housing 140, the upper side is coupled to the upper elastic member 150, and the lower side is connected to the base 210, printed circuit board 250, or circuit. It can be coupled to the member 231 and support the bobbin 110 and the housing 140 so that they can move in a second and/or third direction perpendicular to the first direction, and the first coil It can be electrically connected to (120).

Since one pair of support members 220 according to the embodiment are each disposed on the outer surface of the corner of the housing 140, a total of eight support members 220 can be installed. In another embodiment, a total of four support members 220 may be installed, one each on the outer surface of the corners of the housing 140.

Or, in another embodiment, two may be placed at two corners and one may be placed at the other two corners, for a total of six. Or, in some cases, a total of 7 or 9 or more may be placed.

Additionally, the support member 220 may be electrically connected to the upper elastic member 150. That is, for example, the support member 220 may be electrically connected to a portion of the upper elastic member 150 where a through hole is formed.

In addition, since the support member 220 is formed as a separate member from the upper elastic member 150, the support member 220 and the upper elastic member 150 may be electrically connected through a conductive adhesive, soldering, or welding. You can. Accordingly, the upper elastic member 150 can apply current to the first coil 120 through the electrically connected support member 220.

The support member 220 may be connected to the printed circuit board 250 through a hole formed in the circuit member 231 and/or the printed circuit board 250. Alternatively, no through hole may be formed in the circuit member 231 and/or the printed circuit board 250, and the support member 220 may be electrically soldered to a corresponding portion of the circuit member 231.

Meanwhile, in FIG. 2, the linear support member 220 is shown as an example, but the present invention is not limited thereto. That is, the support member 220 may be provided in the form of a plate-shaped member, etc.

The second coil 230 may perform hand shake correction by moving the housing 140 in the second and/or third directions through electromagnetic interaction with the first magnet 130.

Here, the second and third directions may include directions substantially close to the x-axis and y-axis as well as the x-axis (or first direction) and y-axis (or second direction) directions. That is, from the driving aspect of the embodiment, the housing 140 may move parallel to the x-axis and y-axis, but may also move slightly inclined to the x-axis and y-axis when moved while supported by the support member 220. there is.

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. In one embodiment, 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 on the four sides of the circuit member 231, but this is not limited, and one for the second direction and one for the third direction. It is possible for only two, etc., to be installed, or four or more can be installed.

Or, 1 on the first side for the second direction, 2 on the 2nd side for the 2nd direction, 1 on the 3rd side for the 3rd direction, and 2 on the 4th side for the 3rd direction, for a total of 6. It could be. Or, in this case, the first side and the fourth side may be adjacent to each other, and the second side and the third side may be adjacent to each other.

In the case of the embodiment, a circuit pattern may be formed in the shape of the second coil 230 on the circuit member 231, or a separate second coil may be disposed on the circuit member 231, but the present invention is not limited to this, and the circuit A circuit pattern may be formed in the shape of the second coil 230 directly on the member 231.

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 or disposed 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 printed circuit board 250 is electrically connected to at least one of the upper elastic member 150 and the lower elastic member 160 and is coupled to the upper surface of the base 210, as shown in FIG. 2. A through hole into which the support member 220 is inserted may be formed at a position corresponding to an end of the support member 220. Alternatively, the through hole may not be formed and may be electrically connected and/or bonded to the support member.

A terminal 251 may be disposed or formed on the printed circuit board 250, and the terminal 251 may be disposed on the bent terminal surface 253. A plurality of terminals 251 are disposed on the terminal surface 253 to receive external power and supply current to the first coil 120 and/or the second coil 230. The number of terminals formed on the terminal surface 253 may increase or decrease depending on the types of components that require control. Additionally, the printed circuit board 250 may be provided with one or two or more terminal surfaces 253.

The cover member 300 may be provided in a substantially box shape, may accommodate part or all of the movable part, the second coil 230, and the printed circuit board 250, and may be coupled to the base 210. Additionally, a portion of the cover member 300 may be disposed on the upper side of the support member 220.

The cover member 300 can protect the movable part, the second coil 230, the printed circuit board 250, etc. accommodated therein from damage, and additionally, the first magnet 130 accommodated therein. ), the electromagnetic field generated by the first coil 120, the second coil 230, etc., can be restricted from leaking to the outside and the electromagnetic field can be focused.

Figure 3 is a cross-sectional view showing an embodiment of part A of Figure 1. As shown in FIG. 3, an escape groove 3100 may be formed in the cover member 300. The escape groove 3100 may be formed by recessing the cover member 300 in a first direction at a portion of the cover member 300, that is, a portion facing the support member 220 in the first direction.

The escape groove 3100 can prevent an electrical short from occurring due to contact between the support member 220 and the cover member 300.

The upper part of the support member 220 may be electrically connected to the upper elastic member 150. In order to strengthen this electrical connection, the lens driving device of the embodiment may further include a soldering portion 4000 that couples the upper part of the support member 220 and the upper elastic member 150.

The top of the soldering part 4000, which is close to the lower surface of the cover member 300 in the first direction, is in direct contact with the cover member 300, so that the support member 220 and the cover member 300 are electrically connected. may be connected, an electrical short may occur. The short circuit may cause the following problems:

The short may result in malfunction of the auto-focusing and/or image stabilization functions of the lens driving device. For example, due to the short circuit, unwanted oscillation may occur in the bobbin 110 that receives current through the support member 220.

In addition, for example, mechanical hysteresis may increase in the support member 220, the bobbin 110, the upper elastic member 150, and the lower elastic member due to the short circuit and oscillation of the bobbin 110. .

The above-mentioned increase in oscillation and hysteresis may ultimately significantly deteriorate the auto-focusing and/or camera shake correction functions of the lens driving device. As a result, the focus control and hand shake control functions of the camera module including the lens driving device may be significantly deteriorated, ultimately leading to a significant deterioration in the quality of the captured image.

In the embodiment, the above-described problem can be solved by forming the escape groove 3100 to prevent an electrical short between the cover member 300 and the support member 220.

In the embodiment, the depth of the escape groove 3100 is appropriately determined by considering the overall size and structure of the lens driving device. The upper end of the soldering portion 4000 may be located above the upper elastic member 150. In addition, for example, the first direction separation distance (H) between the upper surface of the upper elastic member 150 and the lower surface of the cover member 300 may be approximately 0.5 mm, but is not limited to this and may be smaller or larger. there is.

However, as the production of ultra-small camera modules and lens driving devices increases, the separation distance (H) tends to decrease, so the possibility of contact between the top of the soldering portion 4000 and the bottom of the cover member 300 may increase. .

Therefore, in consideration of this, it is necessary to design the separation distance (H) as large as possible, while determining the depth of the escape groove 3100 so that the top of the soldering portion 4000 does not contact the bottom of the cover member 300. There is. In addition, it is appropriate to determine the depth of the escape groove 3100 by considering the thickness of the portion of the cover member 300 facing the support member 220.

The escape groove 3100 can be formed in various ways. In one embodiment, the escape groove 3100 may be formed by etching the cover member 300. In another embodiment, the escape groove 3100 may be formed together when manufacturing the cover member 300 through injection molding or the like. In another embodiment, the escape groove 3100 may be formed by rolling a portion of the cover member 300.

For example, the cover member 300 may be made of non-magnetic SUS (stainless steel) or nickel silver material. The cover member 300 may be formed to have a thickness of approximately 0.2 mm to 0.3 mm to protect internal components from external impact. At this time, it is appropriate that the depth of the escape groove 3100 is formed to be about 0.05 mm or more. However, this is only an example, and the thickness of the cover member 300 and the thickness of the escape groove 3100 may be formed differently from those described above.

In an embodiment, the escape groove 3100 formed in the cover member 300 prevents an electrical short between the support member 220 and the cover member 300, causing malfunction of the lens driving device due to the short, and Deterioration of image quality can be prevented.

Figure 4 is a partial plan view of the lens driving device according to one embodiment with the cover member 300 removed. Figure 5 is a bottom view showing the cover member 300 according to one embodiment.

As shown in FIG. 4, the support members 220 are provided in the form of a wire and may be arranged in plural numbers at the corners of the housing 140. That is, in the lens driving device of the embodiment, a pair of wire-shaped support members 220 are disposed at each corner of the housing 140, and a total of eight support members 220 may be disposed.

The support member 220 may be coupled to the upper elastic member 150 by a soldering portion 4000 for electrical connection. Accordingly, the escape groove 3100 may be formed in a portion of the cover member 300 that faces the portion where the support member 220 and the soldering portion 4000 are disposed in the first direction.

That is, a plurality of escape grooves 3100 may be provided on the cover member 300 at positions corresponding to the support member 220 in the first direction.

Therefore, as shown in FIG. 5, the escape grooves 3100 may be formed at each corner of the support member 220, and a total of four may be formed. Meanwhile, in Figure 5, the escape groove 3100 is formed in a curved shape, but it is not limited thereto, and may be shaped, for example, in a circular, semicircular, or polygonal shape, if it can prevent short circuiting between the cover member 300 and the support member 220. It may be provided in various other shapes.

Figure 6 is a cross-sectional view showing another embodiment of part A of Figure 1. As shown in FIG. 6, the lens driving device of the embodiment may further include an insulating portion 500. The insulating portion 500 fills the escape groove 3100 and may be formed of an electrically insulating material.

The insulating part 500 is filled in the escape groove 3100, so that even when the upper surface of the soldering part 4000 contacts the lower surface of the insulating part 500, the support member 220 and the cover member 300 ) can be electrically insulated to prevent short circuit between the support member 220 and the cover member 300.

At this time, the insulating portion 500 may be formed of, for example, a polymer material such as polyethylene or polyvinyl chloride, or an electrically insulating epoxy adhesive.

Meanwhile, in another embodiment, although not shown, only the insulating portion 500 is formed without forming the escape groove at a portion of the lower surface of the cover member 300 that contacts the upper surface of the soldering portion 4000. , Even when the upper surface of the soldering part 4000 is in contact with the lower surface of the insulating part 500, the support member 220 and the cover member 300 are electrically insulated, so that the support member 220 and the cover member ( 300) can prevent the occurrence of a short circuit.

Figure 7 is a cross-sectional view showing another embodiment of portion A of Figure 1. As shown in FIG. 7, the escape groove 3100 may be formed so that one surface, i.e., the lower surface, of the cover member 300 is recessed, and the other surface, i.e., the upper surface, of the cover member 300 protrudes.

Due to this structure, the depth of the escape groove 3100 can be increased, and thus an electrical short between the cover member 300 and the support member 220 can be more effectively prevented. This escape groove 3100 may be formed by, for example, injection molding or rolling.

Additionally, as shown in FIG. 7, the escape groove 3100 may be filled with an insulating portion 500 to prevent the short circuit more effectively.

Figure 8 is an enlarged view showing part B of Figure 4. Figure 9 is a perspective view of Figure 8. In FIGS. 8 and 9 , the soldering portion 4000 is omitted for clarity. As shown in FIGS. 8 and 9, the lens driving device of the embodiment may include a protrusion 1410.

The upper elastic member 150 is coupled to the upper surface of the housing 140, and may be provided with a soldering coupling portion 1510 that is soldered to the upper part of the support member 220. Additionally, the housing 140 may be provided with a protrusion 1410 protruding from the upper surface at a position adjacent to the soldering joint 1510.

In addition, as shown in FIGS. 8 and 9, in the embodiment, the soldering joints 1510 are provided as a pair spaced apart from each other, and the protrusion 1410 is a pair of soldering joints ( 1510).

The protrusion 1410 can prevent plastic deformation of the soldering joint 1510. Plastic deformation may occur in the soldering joint 1510 when an external force is applied in the process of coupling the upper elastic member 150 to the upper surface of the housing 140 and electrically connecting it to the support member 220.

The soldering joint 1510 is vulnerable to plastic deformation due to its structure being disposed at the edge of the upper elastic member 150, and a lot of manual labor, including soldering, may be performed on the soldering joint 1510.

For this reason, plastic deformation may occur in the soldering joint 1510 during the assembly process of the upper elastic member 150. When plastic deformation occurs in the soldering joint 1510, the upper elastic member 150 has a deformed shape different from the design, and this deformed upper elastic member 150 has adverse effects such as malfunction and poor performance of the lens driving device. can affect

Therefore, a protrusion 1410 may be formed on the housing 140 to prevent plastic deformation of the soldering joint 1510 during the assembly process of the upper elastic member 150.

As shown in FIG. 9, the protrusion 1410 protrudes in a first direction. Therefore, when the worker performs the task of combining the upper elastic member 150 with the housing 140 and the soldering joint 1510 and the support member 220 by soldering, the worker attaches the protrusion 1410 to the housing 140. As a result, actions such as touching the soldering joint 1510 with hands may be restricted.

There is a high possibility that the soldering joint 1510 will be plastically deformed due to the operator touching the soldering joint 1510. Due to the structure described above, the protrusion 1410 is attached to the soldering joint 1510 by the worker. Plastic deformation of the soldering joint 1510 can be prevented by restricting the contact with hands.

In an embodiment, by forming the protrusion 1410 on the housing 140, plastic deformation of the soldering joint 1510 that may occur when the upper elastic member 150 is coupled to the housing 140 can be effectively prevented. You can.

Meanwhile, the lens driving device according to the above-described embodiment can be used in various fields, such as 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 and an image sensor (not shown) combined with the bobbin 110. At this time, the lens barrel may include at least one lens that transmits an image to the image sensor.

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 holder member may support the lower side of the base 210.

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. Additionally, if the lens driving device includes a separate board, there may be no separate terminal member.

Meanwhile, the base 210 may function as a sensor holder that protects the image sensor. In this case, a portion protruding downward may be formed 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
140: housing
150: Upper elastic member
220: Support member
300: Cover member
1410: protrusion
1510: Soldering joint
3100: Getaway Home
4000: Soldering part
5000: insulation part

Claims (14)

Base;
a cover member disposed on the base;
A bobbin disposed within the cover member;
a housing disposed between the cover member and the bobbin;
a first coil disposed on the bobbin;
A magnet disposed in the housing;
a second coil disposed on the base;
an upper elastic member coupled to the bobbin and the housing; and
It includes a support member electrically connected to the upper elastic member,
The cover member includes an escape groove formed at a position opposite the support member in the optical axis direction,
The upper elastic member includes a soldering joint that is soldered to the support member,
The soldering joint portion includes a pair of soldering joint portions at least partially spaced apart from each other in one corner area of the housing,
The housing includes a protrusion formed on an upper surface of the housing and disposed between the pair of soldering joints,
The protrusion includes a first part formed at a corner edge of the housing, a second part extending from the first part in a first direction perpendicular to the optical axis direction, and a third part formed at an end of the second part. Including,
In a second direction perpendicular to both the optical axis direction and the first direction, the width of the image surface of the second portion is smaller than the width of the image surface of the first portion and the width of the image surface of the third portion, respectively. According to paragraph 1,
A lens driving device wherein the upper surface of the first portion of the protrusion, the upper surface of the second portion, and the upper surface of the third portion are disposed on the same plane. According to paragraph 1,
Includes a printed circuit board disposed on the base,
The second coil is a lens driving device disposed on the printed circuit board. According to paragraph 3,
A circuit member including the second coil and disposed on the printed circuit board,
A lens driving device wherein the support member is coupled to the printed circuit board or the circuit member. According to paragraph 1,
It includes a soldering part that couples the support member and the upper elastic member,
A lens driving device in which the upper end of the soldering portion is spaced apart from the cover member in the optical axis direction by the escape groove. According to paragraph 1,
A lens driving device including an insulating portion disposed in the escape groove and made of an electrically insulating material. According to paragraph 1,
The cover member includes a top plate and a side plate extending from the top plate and disposed on the base,
The escape groove is a lens driving device formed by a portion of the upper plate of the cover member being depressed in the optical axis direction. According to paragraph 1,
A lens driving device wherein the escape groove is formed by rolling a portion of the cover member. image sensor;
The lens driving device of any one of claims 1 to 8; and
A camera module including a lens disposed on the lens driving device. A mobile device including the camera module of claim 9. delete delete delete delete

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