KR20230144490A - Lens driving unit, camera module and optical apparatus - Google Patents

Abstract

In this example, a bobbin; A coil located on the bobbin; a housing located outside the bobbin; A magnet located in the housing and facing the coil; and an elastic member coupled to the bobbin and the housing, wherein the housing includes an upper portion supporting the upper surface of the magnet, and a lateral support portion extending downward from the upper portion and supporting a side surface of the magnet. , the elastic member relates to a lens driving unit including at least a portion of an outer portion positioned between the upper portion and the magnet.
Through the present invention, the manufacturing process of the lens driving unit is simplified, so effects such as reduced manufacturing personnel, reduced jig cost, reduced product unit price, and reduced defect rate can be expected.

Description

Lens driving unit, camera module and optical apparatus}

This embodiment relates to a lens drive unit, camera module, and optical equipment.

The content described below only provides background information for this embodiment and does not describe prior art.

As various types of portable terminals become widespread and wireless Internet services become commercialized, consumer demands related to portable terminals are also diversifying, and various types of additional devices are being installed on portable terminals.

Among them, a representative one is a camera module that takes photos or videos of a subject. Meanwhile, recently, camera modules equipped with an autofocus function that automatically adjusts the focal length according to the distance of the subject are being used. As an example, the mentioned autofocus function is realized by moving the lens in the optical axis direction with respect to the image sensor, but conventionally, it is realized by moving the bobbin on which the lens is fixed in the optical axis direction.

However, in the prior art, there is a problem in fixing the magnet and combining the elastic members because foreign substances are generated. In addition, in the prior art, when combining elastic members, there is a problem of increasing manufacturing costs because it goes through a three-step process of assembly, joining, and inspection.

(Patent Document 1) KR 10-1366662 B1

In order to solve the above-mentioned problem, it is intended to provide a lens driving unit in which an elastic member is fixed by the force that couples the magnet to the housing.

In addition, to prevent foreign substances from penetrating into the interior of the housing, a lens driving unit with a foreign matter reinforcement structure is provided.

Furthermore, the object is to provide a camera module and optical device including the lens driving unit.

The lens driving unit according to this embodiment includes a bobbin; A coil located on the bobbin; a housing located outside the bobbin; A magnet located in the housing and facing the coil; and an elastic member coupled to the bobbin and the housing, wherein the housing includes an upper portion supporting the upper surface of the magnet, and a lateral support portion extending downward from the upper portion and supporting a side surface of the magnet. , the elastic member may include at least a portion of an outer portion located between the upper portion and the magnet.

The outer portion may be in surface contact with the housing on one side, and may be in surface contact with the magnet on the other side.

An adhesive may be interposed between the outer portion and the upper portion, or the outer portion and the magnet.

The outer portion may be fixed between the magnet and the upper portion by a force that couples the magnet to the housing.

The upper portion has four corner portions, and the lateral support portion includes first to fourth supports extending downward from each of the four corner portions of the upper portion, and the first support portion includes the fourth support portion and the second support portion. and the third support is adjacent to the second and fourth supports, the magnet is located between the first and second supports and between the third and fourth supports, and the second and fourth supports are adjacent to each other. A side plate may be positioned between the three supports and between the fourth and first supports.

The elastic member may further include an inner portion coupled to the bobbin and a connection portion connecting the outer portion and the inner portion.

The outer portion includes a first outer end located between the first and second supports, a second outer end located between the second and third supports, and a third outer end located between the third and fourth supports. an end, and a fourth outer end located between the fourth and first support portions, wherein the inner portion includes a first inner end facing the first outer end, a second inner end facing the second outer end, and It may include a third inner end facing the third outer end, and a fourth inner end facing the fourth outer end.

The connection part may include a first connection body connecting the second inner end and the third inner end and the first outer end.

The connection part further includes a second connector connecting the third inner end and the fourth inner end and the second outer end, and the second outer end may be fixed to the housing with an adhesive.

The connecting portion may include a first connecting member connecting the first outer end and the second inner end, and a second connecting member connecting the first outer end and the fourth inner end.

The connection portion may not be directly connected to the second outer end.

The upper portion of the housing and the bobbin may overlap at least partially in the optical axis direction.

A stepped portion that is concave downward is formed on the upper surface of the bobbin, and the stepped portion may be positioned around the outer circumference of the upper surface of the bobbin.

At least a portion of the elastic member may have a shape corresponding to the lateral support portion.

It further includes a base supporting the housing from a lower side, wherein the lateral support portion includes a recessed portion that is recessed upward from the bottom of the lateral support portion, and the base includes an extension portion that extends upward to correspond to the lateral support portion, The recessed portion is located outside the lateral support portion and may accommodate the extension portion.

The bobbin may be seated on the base in an initial state in which power is not supplied to the coil.

The elastic member may be an upper elastic member coupled to the upper part of the bobbin and the upper part of the housing.

It further includes a lower elastic member connecting the bobbin and the lower part of the housing, wherein the lower elastic members are provided in pairs and each is connected to the coil, and each of the pair of lower elastic members is bent downward to form a base. It may include a terminal portion accommodated in the terminal receiving portion.

The side plate may include a first plate integrally formed with the second and third support portions, and a second plate integrally formed with the fourth and first support portions.

The lateral support portion may include a support end supporting a portion of the inner surface of the magnet.

A hole may be formed in the inner portion, and a protrusion corresponding to the hole may be formed in the bobbin.

The camera module according to this embodiment includes a bobbin; A coil located on the bobbin; a housing located outside the bobbin; A magnet located in the housing and facing the coil; and an elastic member coupled to the bobbin and the housing, wherein the housing includes an upper portion supporting the upper surface of the magnet, and a lateral support portion extending downward from the upper portion and supporting a side surface of the magnet. , the elastic member may include at least a portion of an outer portion located between the upper portion and the magnet.

The optical device according to this embodiment includes a main body, a display unit disposed on one side of the main body to display information, and a camera module installed in the main body to capture images or photos, and the camera module is a bobbin ; A coil located on the bobbin; a housing located outside the bobbin; A magnet located in the housing and facing the coil; and an elastic member coupled to the bobbin and the housing, wherein the housing includes an upper portion supporting the upper surface of the magnet, and a lateral support portion extending downward from the upper portion and supporting a side surface of the magnet. , the elastic member may include at least a portion of an outer portion located between the upper portion and the magnet.

Through the present invention, the manufacturing process of the lens driving unit is simplified, so effects such as reduced manufacturing personnel, reduced jig cost, reduced product unit price, and reduced defect rate can be expected.

Additionally, issues regarding foreign matter generation and penetration into the lens driving unit can be minimized.

1 is a perspective view of a lens driving unit according to this embodiment.
Figure 2 is an exploded perspective view of the lens driving unit according to this embodiment.
Figure 3 is a cross-sectional view of a lens driving unit according to this embodiment.
Figure 4 is a plan view showing some components of the lens driving unit according to this embodiment.
Figure 5 is a bottom perspective view showing the housing of the lens driving unit according to this embodiment.
Figure 6 is a bottom view showing some components of the lens driving unit according to this embodiment.
Figure 7 is a plan view showing an upper support member according to a modification.
Figure 8 is a perspective view showing some components of the lens driving unit according to this embodiment.
Figure 9 is a cross-sectional view of Figure 8 viewed from A1-A2.
Figure 10 is a plan view showing some components of the lens driving unit according to this embodiment.
Figure 11 is a bottom view showing some components of the lens driving unit according to this embodiment.
Figure 12 is an exploded perspective view of a lens driving unit according to a modification.
Figure 13 is a bottom perspective view showing the assembly process of the upper support member and the second driving part of the lens driving unit according to a modification.

Hereinafter, some embodiments of the present invention will be described through exemplary drawings. When assigning reference numerals to components in each drawing, identical components are indicated with the same reference numerals as much as possible, even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being "connected," "coupled," or "connected" to another component, that component may be directly connected, coupled, or connected to that other component, but may not be connected to that component or that other component. It should be understood that another component may be “connected,” “coupled,” or “connected” between elements.

The “optical axis direction” used below is defined as the optical axis direction of the lens module in the state of being coupled to the lens drive unit. Meanwhile, “optical axis direction” can be used interchangeably with vertical direction, z-axis direction, etc.

The "autofocus function" used below focuses on the subject by adjusting the distance to the image sensor by moving the lens module in the optical axis direction according to the distance to the subject so that a clear image of the subject can be obtained on the image sensor. Defined as a function. Meanwhile, “auto focus” can be used interchangeably with “AF (Auto Focus).”

The “image shake correction function” used below is defined as a function that moves or tilts the lens module in a direction perpendicular to the optical axis to offset vibration (movement) generated in the image sensor by external force. Meanwhile, “image stabilization” can be used interchangeably with “OIS (Optical Image Stabilization).”

Below, the configuration of the optical device according to this embodiment will be described.

Optical devices according to this embodiment include mobile phones, mobile phones, smart phones, portable smart devices, digital cameras, laptop computers, digital broadcasting terminals, PDAs (Personal Digital Assistants), and PMPs (Portable Multimedia Players). ), navigation, etc., but is not limited to this and any device for taking videos or photos is possible.

The optical device according to this embodiment includes a main body (not shown), a display unit (not shown) disposed on one side of the main body to display information, and a camera module (not shown) installed in the main body to capture images or photos. It may include a camera (not shown) having a camera (not shown).

Below, the configuration of the camera module according to this embodiment will be described.

The camera module further includes a lens driving unit (not shown), a lens module (not shown), an infrared cut-off filter (not shown), a printed circuit board (not shown), an image sensor (not shown), and a control unit (not shown). can do.

The lens module may include one or more lenses (not shown) and a lens barrel that accommodates one or more lenses. However, the configuration of the lens module is not limited to the lens barrel, and any holder structure that can support one or more lenses is possible. The lens module is coupled to the lens driving unit and can move together with the lens driving unit. The lens module may be coupled to the inside of the lens drive unit, as an example. The lens module may be screwed together with a lens drive unit, as an example. As an example, the lens module may be coupled to the lens driving unit using an adhesive (not shown). Meanwhile, light passing through the lens module may be irradiated to the image sensor.

An infrared cut-off filter can block light in the infrared region from entering the image sensor. As an example, an infrared cut-off filter may be located between the lens module and the image sensor. The infrared cut-off filter may be located on a holder member (not shown) that is provided separately from the base 600. However, the infrared filter may be mounted in the through hole 611 formed in the center of the base 600. The infrared filter may be formed of, for example, a film material or a glass material. Meanwhile, an infrared filter may be formed by coating an infrared blocking coating material on a flat optical filter, such as a cover glass for protecting an imaging surface, as an example.

The printed circuit board may support the lens drive unit. An image sensor may be mounted on a printed circuit board. As an example, an image sensor may be located inside the upper surface of the printed circuit board, and a sensor holder (not shown) may be located outside the upper surface of the printed circuit board. A lens driving unit is located on the upper side of the sensor holder. Alternatively, the lens driving unit may be located outside the upper surface of the printed circuit board, and the image sensor may be located inside the upper surface of the printed circuit board. Through this structure, light passing through the lens module accommodated inside the lens driving unit can be irradiated to an image sensor mounted on a printed circuit board. A printed circuit board can supply power to the lens drive unit. Meanwhile, a control unit for controlling the lens driving unit may be located on the printed circuit board.

The image sensor may be mounted on a printed circuit board. The image sensor may be positioned so that its optical axis coincides with the lens module. Through this, the image sensor can acquire light that has passed through the lens module. An image sensor can output irradiated light as an image. The image sensor may be, for example, a charge coupled device (CCD), a metal oxide semiconductor (MOS), a CPD, and a CID. However, the type of image sensor is not limited to this.

The control unit may be mounted on a printed circuit board. The control unit may be located outside the lens driving unit. However, the control unit may be located inside the lens driving unit. The control unit can control the direction, intensity, and amplitude of the current supplied to each component of the lens driving unit. The control unit may control the lens driving unit to perform one or more of the autofocus function and the image stabilization function of the camera module. That is, the control unit controls the lens driving unit to move the lens module in the optical axis direction, or to move or tilt the lens module in a direction perpendicular to the optical axis direction. Furthermore, the control unit can perform feedback control of the autofocus function and image stabilization function.

Hereinafter, the configuration of the lens driving unit according to this embodiment will be described with reference to the drawings.

FIG. 1 is a perspective view of a lens driving unit according to this embodiment, FIG. 2 is an exploded perspective view of a lens driving unit according to this embodiment, FIG. 3 is a cross-sectional view of a lens driving unit according to this embodiment, and FIG. 4 is a cross-sectional view of a lens driving unit according to this embodiment. It is a top view showing some components of the lens driving unit according to the embodiment, FIG. 5 is a bottom perspective view showing the housing of the lens driving unit according to the present embodiment, and FIG. 6 is a portion of the lens driving unit according to the present embodiment. FIG. 7 is a bottom view showing components, FIG. 7 is a plan view showing an upper support member according to a modification, FIG. 8 is a perspective view showing some components of a lens driving unit according to this embodiment, and FIG. 9 is a 8 is a cross-sectional view viewed from A1-A2, FIG. 10 is a plan view showing some components of the lens driving unit according to this embodiment, and FIG. 11 is a bottom view showing some components of the lens driving unit according to this embodiment. 12 is an exploded perspective view of a lens driving unit according to a modified example, and FIG. 13 is a bottom perspective view showing the assembly process of the upper support member and the second driving unit of the lens driving unit according to a modified example.

Referring to the drawings, the lens driving unit according to this embodiment includes a cover member 100, a bobbin 200, a first driving part 300, a housing 400, a second driving part 500, a base 600, and It may include support members 700 and 800. However, in this embodiment, any of the cover member 100, the bobbin 200, the first driving part 300, the housing 400, the second driving part 500, the base 600, and the support members 700 and 800. One or more may be omitted.

The cover member 100 may form the exterior of the lens driving unit. The cover member 100 may have a hexahedral shape with an open bottom. However, the shape of the cover member 100 is not limited to this. The bobbin 200, the first driving part 300, the housing 400, the second driving part 500, and the support members 700 and 800 are located in the internal space formed by the cover member 100 and the base 600. can do. Through this structure, the cover member 100 can protect internal components from external impact and simultaneously prevent penetration of external contaminants.

As an example, at least a portion of the cover member 100 may be formed of a metal material. In more detail, the cover member 100 may be made of a metal plate. In this case, the cover member 100 can block electromagnetic interference (EMI). That is, the cover member 100 can block radio waves generated outside the cover member 100 from flowing into the inside of the cover member 100. Additionally, the cover member 100 may block radio waves generated inside the cover member 100 from being emitted outside the cover member 100 . However, the material of the cover member 100 is not limited to this.

The cover member 100 may include an upper plate 101, an outer plate 102, and an inner plate 103. The cover member 100 may include an upper plate 101 forming the upper surface, an outer plate 102 forming an outer surface, and an inner plate 103 located inside and facing the outer plate 102. there is. The cover member 100 may include an upper plate 101 and an outer plate 102 extending downward from the outside of the upper plate 101. The lower end of the outer plate 102 may be coupled to the base 600. The inner plate 103 may be formed to extend downward from the inner side of the upper plate 101. The inner plate 103 is accommodated in the inner plate receiving groove 260 of the bobbin 200 and can prevent the bobbin 200 from rotating. That is, the bobbin 200 and the inner plate 103 forming the inner plate receiving groove 260 are formed to be caught when the bobbin 200 rotates, thereby preventing the bobbin 200 from rotating. The inner plate 103 may be formed at each of the four corners, but is not limited thereto. The width of the inner plate 103 may correspond to or be smaller than the width of the inner plate receiving groove 260.

The cover member 100 may include an opening. The cover member 100 may include an opening formed in the upper plate 101 to expose the lens module. The opening may be provided in a shape corresponding to the lens module. The size of the opening may be larger than the diameter of the lens module so that the lens module can be assembled through the opening. Additionally, light introduced through the opening may pass through the lens module. Meanwhile, light passing through the lens module may be transmitted to the image sensor.

The bobbin 200 may be movably supported in the housing 400 . The bobbin 200 can perform an autofocus function by moving in the optical axis direction with respect to the housing 400. The bobbin 200 may be seated on the base 600 in an initial state in which power is not supplied to the coil of the first driving unit 300. That is, the bobbin 200 can be driven in one direction. More specifically, in the initial state, the bobbin 200 moves upward according to the supply of power and performs an autofocus function. At this time, the upper support member 700 and/or the lower support member 800 may be designed to press the bobbin 200 toward the base 600 in the initial state. This can be explained by providing an offset to the distance between the inner portions 720 and 820 of the upper support member 700 and/or the lower support member 800 compared to the outer portions 710 and 810.

The bobbin 200 includes a lens coupling portion 210, a first driving portion coupling portion 220, an upper coupling portion 230, a lower coupling portion 240, a step portion 250, and an inner plate receiving groove 260. It can be included.

The bobbin 200 may include a lens coupling portion 210 to which a lens module is coupled. A lens module may be coupled to the lens coupling unit 210. A screw thread having a shape corresponding to a screw thread formed on the outer circumferential surface of the lens module may be formed on the inner peripheral surface of the lens coupling portion 210. That is, the outer peripheral surface of the lens module may be screwed to the inner peripheral surface of the lens coupling unit 210. Meanwhile, adhesive may be injected between the lens module and the bobbin 200. At this time, the adhesive may be an epoxy that is cured by ultraviolet rays (UV) or heat.

The bobbin 200 may include a first drive unit coupling portion 220 to which the first drive unit 300 is coupled. The first driving part 300 can be accommodated in the first driving part coupling part 220. The first drive unit coupling portion 220 may be formed integrally with the outer surface of the bobbin 200. Additionally, the first drive unit coupling portion 220 may be formed continuously along the outer surface of the bobbin 200 or may be formed spaced apart at predetermined intervals. The first drive unit coupling portion 220 may be formed by recessing a portion of the outer surface of the bobbin 200.

The bobbin 200 may include an upper coupling portion 230 coupled to the upper support member 700. The upper coupling portion 230 may be coupled to the inner portion 720 of the upper support member 700. As an example, a protrusion (not shown) of the upper coupling part 230 may be inserted into and coupled to a groove or hole (not shown) of the inner part 720. With the protrusion of the upper coupling part 230 inserted into the groove or hole of the inner part 720, the upper support member 700 can be coupled to the bobbin 200 by fusing the protrusion or bonding an adhesive member.

The bobbin 200 may include a lower coupling portion 240 coupled to the lower support member 800. The lower coupling portion 240 may be coupled to the inner portion 820 of the lower support member 800. As an example, a protrusion (not shown) of the lower coupling part 240 may be inserted into and coupled to a groove or hole (not shown) of the inner part 820. With the protrusion of the lower coupling part 240 inserted into the groove or hole of the inner part 820, the lower support member 800 can be coupled to the bobbin 200 by fusing the protrusion or bonding an adhesive member.

A stepped portion 250 that is concave downward may be formed on the upper surface of the bobbin 200. The step portion 250 may be located around the outer circumference of the upper surface of the bobbin 200. The step portion 250 may be formed so as not to interfere with the upper portion 410 of the housing 400 while the bobbin 200 moves in the optical axis direction (up and down direction). That is, the step portion 250 can secure movement space above the bobbin 200. The step portion 250 is formed on the upper surface of the bobbin 200 and may be located at a portion where the bobbin 200 and the upper portion 410 of the housing 400 overlap in the optical axis direction. However, it is not limited to this, and the step portion 250 may be located even in a portion where the bobbin 200 and the upper portion 410 of the housing 400 do not overlap in the optical axis direction.

In this embodiment, the upper portion 410 of the housing 400 and the bobbin 200 may be formed to overlap as much of the area as possible in the optical axis direction. In this case, the phenomenon of foreign matter flowing into the space between the housing 400 and the bobbin 200 and entering the image sensor can be minimized. As an example, as shown in FIG. 10, the upper portion 410 of the housing 400 and the bobbin 200 may overlap so that the space between the housing 400 and the upper portion 410 is not visible when viewed from the top. .

In this embodiment, the upper support member 700 may be located in the step portion 250. Therefore, in this embodiment, the upper support member 700 can be positioned over a wider area compared to the embodiment in which the step portion 250 is not provided. This means that the connection portion 730 of the upper support member 700 can be formed to be wider and longer.

In general, elastic members can be manufactured through etching, with an etching tolerance of approximately ±0.007 mm, for example. Additionally, in the case of a glass photo mask, it is approximately ±0.003 mm. Meanwhile, the wider the width of the elastic member, the more advantageous the stiffness of the elastic member is less affected by tolerances. To help understanding, for example, when the elastic member is manufactured with a width of 1 mm, the width of the elastic member considering the error is 1 ± 0.007 mm, but when the elastic member is manufactured with a width of 0.1 mm, the elastic member considering the error is 1 ± 0.007 mm. The width is 0.1 ± 0.007 mm. In other words, as the width of the elastic member is manufactured, the distribution of stiffness decreases, and in this case, it becomes advantageous to manage the distribution of start current and sensitivity of the unidirectional drive lens drive unit.

However, when the width of the elastic member is wide, the length needs to be increased compared to when the width is narrow to obtain the same rigidity as when the width is narrow. In this embodiment, the step portion 250 is located around the outer periphery of the upper surface of the bobbin 200 to expand the acceptable area of the upper support member 700, and as a result, the upper support member 700 has a wider width. It is possible to form it long. That is, in this embodiment, the rigidity of the upper support member 700 is less affected by the tolerance. This means that the distribution of stiffness of the upper support member 700 is reduced, so in this embodiment, management of the distribution of operation start current and sensitivity becomes advantageous according to the results observed.

The bobbin 200 may include an inner plate receiving groove 260 in which at least a portion of the inner plate 103 of the cover member 100 is accommodated. The inner plate receiving groove 260 may be formed on the upper surface of the bobbin 200. The inner plate receiving groove 260 may be formed by a portion of the upper surface of the bobbin 200 being depressed downward. The recessed depth of the inner plate receiving groove 260 may be deeper than the recessed depth of the step portion 250. At this time, the depth is defined as the length from the top to the bottom of the bobbin 200. In addition, the upper surface of the bobbin 200 forming the inner plate receiving groove 260 is lower than the upper surface of the bobbin 200 forming the step portion 250 when the bobbin 200 is coupled to the housing 400. It can be located in . That is, the inner plate receiving groove 260 may be recessed lower than the step portion 250. The inner plate 103 of the cover member 100 can be accommodated in the inner plate receiving groove 260, and the received inner plate 103 is caught on the bobbin 200 forming the inner plate receiving groove 260 and rotates. This can be prevented. As an example, one inner plate receiving groove 260 may be provided on each of the four corner sides. However, it is not limited to this.

The first driving unit 300 may be located in the bobbin 200. The first driving part 300 may be inserted into and fixed to the first driving part coupling part 220 of the bobbin 200. As an example, the first driving unit coupling portion 220 may be formed with protruding portions located on the upper and lower sides of the recessed portion, and in this case, the coil of the first driving unit 300 is wound directly on the first driving coupling portion 220. It can be good. Or, as another example, the first driving part coupling part 220 may be formed in a form in which the upper or lower side of the recessed part is open and a locking part is provided on the other side. In this case, the coil of the first driving part 300 is preliminarily formed. It can be inserted and coupled through the open part in the wound state.

The first driving unit 300 may include a coil. The coil of the first driving unit 300 may be guided by the first driving unit coupling part 220 and wound on the outer surface of the bobbin 200. In addition, in another embodiment, four coils may be independently provided and disposed on the outer surface of the bobbin 200 so that two neighboring coils are at an angle of 90° to each other. The first driving unit 300 may be located opposite to the second driving unit 500. The first driving unit 300 can move the bobbin 200 with respect to the housing 400 in the optical axis direction through electromagnetic interaction with the second driving unit 500. The coil of the first driving unit 300 may include a pair of lead wires 301 and 302. A pair of lead wires 301 and 302 may be electrically connected to a pair of lower support members 801 and 802 to receive current. When current is supplied to the coil of the first driving part 300, the first driving part 300 moves due to electromagnetic interaction with the magnets 501 and 502 of the second driving part 500, and the first driving part 300 moves. The combined bobbin 200 also moves.

The housing 400 may be located outside the bobbin 200. The upper and lower sides of the housing 400 are open and can movably accommodate the bobbin 200. The inner peripheral surface of the housing 400 may be positioned spaced apart from the outer peripheral surface of the bobbin 200. The housing 400 may be fixed to the base 600, as an example. However, as a modified example, the housing 400 is movably coupled to the base 600 through a lateral elastic member and can be moved to perform the hand shake correction function. The housing 400 is made of an insulating material and can be manufactured as an injection molded product considering productivity.

The housing 400 may include an upper portion 410, a side support portion 420, and a side plate 430.

The housing 400 may include an upper part 410 that supports the upper surface of the second driving part 500. The upper part 410 forms the upper surface of the housing 400 and can support the upper surface of the second driving unit 500. The upper part 410 may have a through hole 411 on the inside. Light incident through the through hole 411 may be incident on the lens module. The upper portion 410 may overlap the bobbin 200 at least partially in the optical axis direction. The upper portion 410 may be formed so that the separation space between the inner surface of the housing 400 and the outer surface of the bobbin 200 is not visible when viewed from the top of the housing 400. In this case, the phenomenon of foreign substances flowing into the space between the housing 400 and the bobbin 200 can be minimized.

The upper portion 410 may function as a mechanical stopper for the bobbin 200. That is, the upper part 410 does not contact the bobbin 200 while moving by the autofocus function of the bobbin 200, but moves in the upper direction of the bobbin 200 when the bobbin 200 moves due to an external impact. The upper limit of movement can be restricted. Alternatively, the upper part 410 may function as a stopper that contacts the bobbin 200 while the bobbin 200 is moving by the autofocus function. However, when the upper part 410 acts as a stopper for the bobbin 200, there is a possibility that foreign matter may be generated due to grinding during reliability testing, so if necessary, the inner plate 103 of the cover member 100 and the bobbin ( 200) A stopper portion may be formed between them. That is, a stopper function may be implemented by a portion of the inner plate receiving groove 260 of the bobbin 200 contacting the end of the inner plate 103 of the cover member 100.

The upper portion 410 may include four corner portions, as an example. That is, the shape of the upper portion 410 may be square. A lateral support member 420 extending downward may be provided at each of the four corner portions of the upper portion 410.

The housing 400 may include a side support part 420 that extends downward from the upper part 410 and supports the side of the second driving part 500. The lateral support portion 420 may include first to fourth support portions 421, 422, 423, and 424 extending downward from each of the four corner portions of the upper portion 410. At this time, the first support part 421 may be adjacent to the fourth support part 424 and the second support part 422, and the third support part 423 may be adjacent to the second support part 422 and the fourth support part 424. there is. That is, the first to fourth support parts 421 to 424 may be arranged continuously in a clockwise or counterclockwise direction.

A second driving unit 500 may be located between the first support part 421 and the second support part 422 and between the third support part 423 and the fourth support part 424. Meanwhile, a side plate 430 may be positioned between the second support part 422 and the third support part 423 and between the fourth support part 424 and the first support part 421. That is, the two second driving units 500 and the two lateral plates 430 may be coupled to the lateral support unit 420. At this time, the two second driving units 500 may face each other. Additionally, the two side plates 430 may also face each other.

The lateral support portion 420 may include a depression 426 that is depressed upward from the bottom of the lateral support portion 420. An extension portion 620 of the base 600 may be located in the recessed portion 426. The recessed portion 426 may be formed in a shape corresponding to the extended portion 620. That is, the lateral support portion 420 may have a shape corresponding to the extension portion 620 of the base 600 at least in part. The side support portion 420 can be more firmly coupled by combining the recessed portion 426 and the extension portion 620. In particular, when the depression 426 is located on the outside of the lateral support 420, when the extension 620 is received in the depression 426, the extension 620 supports the outside of the lateral support 420. As a result, the phenomenon of the housing 400 being separated in an outward direction despite external impact can be minimized. As shown in FIGS. 5 and 6, when the housing 400 is viewed from below, a lateral support portion 420 of the housing 400 is located between the recessed portion 426 of the housing 400 and the first magnet 501. Part of may be placed. The depression 426 may be a 'groove'.

The lateral support portion 420 may include a coupling protrusion 427 that protrudes downward from the bottom of the lateral support portion 420. The coupling protrusion 427 may protrude downward from the bottom of the lateral support portion 420. The coupling protrusion 427 may be accommodated in the coupling groove 630 of the base 600. A groove formed on the outer portion 810 of the lower support member 800 may be fastened to the coupling protrusion 427.

The lateral support part 420 may include a support end 425 that supports a portion of the inner surface of the second driving part 500. The support end 425 supports a portion of the inner surface of the second driving unit 500, thereby preventing the second driving unit 500 from being separated inward. In addition, the support end 425 supports at least a portion of the inner surface of the second driving part 500 to be open inward so that the electromagnetic interaction between the second driving part 500 and the first driving part 300 is minimized. can be formed.

The side plate 430 is formed integrally with the first plate 431, which is integrally formed with the second support portion 422 and the third support portion 423, and the fourth support portion 424 and the first support portion 421. It may include a second plate 432. The side plate 430 is formed integrally with the side support portion 420, thereby minimizing the phenomenon of foreign substances flowing in from the side of the housing 400. Meanwhile, as a modified example, when four second driving units 500 are provided, the side plate 430 may be omitted.

The second driving unit 500 may be located opposite to the first driving unit 300. The second driving unit 500 can move the first driving unit 300 through electromagnetic interaction with the first driving unit 300. The second driving unit 500 may include a magnet. The second driving unit 500 may include two magnets, as an example. As an example, the second driving unit 500 may include a first magnet 501 and a second magnet 502 as shown in FIG. 6 . At this time, the first magnet 501 and the second magnet 502 may be positioned to face each other. In this way, when two magnets are provided, the side plate 430 is placed on two of the four sides of the housing 400 to minimize the phenomenon of foreign substances penetrating into the side of the housing 400.

As a modified example, the second driving unit 500 may include four magnets as shown in FIG. 12 . At this time, the four magnets can be provided independently and arranged in the housing 400 so that the two neighboring magnets form an angle of 90° to each other. That is, the four magnets can be placed on each of the four sides of the housing 400 to promote efficient use of the internal volume.

The second driving unit 500 may be located in the housing 200. The second driving unit 500 may be inserted into and fixed to the housing 400. In more detail, the upper surface of the second driving unit 500 may be supported by the upper part 410 of the housing 400, and the side surface may be supported by the lateral support part 420 of the housing 400. Additionally, the lower surface of the second driving unit 500 may be supported by the base 600. An upper support member 700 may be interposed between the second driving part 500 and the upper part 410. An adhesive may be interposed between the second driving unit 500 and the housing 400 and/or base 600.

Meanwhile, as a modified example, the first driving unit 300 may include a magnet, and the second driving unit 500 may include a coil.

The base 600 can support the housing 400 from the lower side. Base 600 may be combined with housing 400. The base 600 may be combined with the cover member 100. The base 600 may be coupled to the outer plate 102 of the cover member 100. At least a portion of the outer surface of the base 600 may contact the inner surface of the outer plate 102 of the cover member 100. A protrusion protruding outward is provided at the bottom of the base 600 to support the bottom of the outer plate 102 of the cover member 100.

The base 600 may include a lower part 610, an extension part 620, and a coupling groove 630.

The base 600 may include a lower portion 610 that supports the housing 400. The lower portion 610 may support the lower end of the lateral support portion 420 of the housing 400. The lower part 610 may include a through hole 611 on the inside. Through the through hole 611, light passing through the lens module can reach the image sensor located on the lower side of the base 600. The lower portion 610 may include a coupling groove 630 in a portion that supports the lower end of the lateral support portion 420 of the housing 400. Meanwhile, a coupling protrusion 427 inserted into the coupling groove 630 may be formed at the bottom of the lateral support portion 420. The hole formed in the outer portion 810 of the lower support member 800 may be coupled to the coupling protrusion 427. That is, the lower support member 800 may be interposed between the lower part 610 of the base 600 and the lateral support part 420 of the housing 400. Meanwhile, the lower support member 800 may be fixed by being coupled to the coupling protrusion 427 of the length-length support part 420 inserted into the coupling groove 630 of the lower part 610. The lower portion 610 may include a terminal receiving portion 612 that is formed by being recessed inward on the side. The terminal receiving portion 612 can accommodate the terminal portion 811 of the lower support member 800.

The base 600 may include an extension portion 620 extending upward to correspond to the lateral support portion 420. The extension part 620 may extend upward from the lower part 610. The extension portion 620 may be formed at each of the four corner portions of the lower portion 610. The extension portion 620 may be inserted into the recessed portion 426 of the lateral support portion 420. As an example, the depression 426 is formed on the outside of the lateral support 420, and in this case, the extension 620 is inserted into the depression 426 to support the outside of the lateral support 420, thereby forming the housing 400. It is possible to prevent the base 600 from deviating to the outside.

The base 600 may include a coupling groove 630 in which the coupling protrusion 427 of the lateral support portion 420 is accommodated. The coupling groove 630 may be formed in a shape corresponding to the coupling protrusion 427. As an example, the coupling protrusion 427 may have a cylindrical shape, and the coupling groove 630 may also have a corresponding shape. However, it is not limited to this. The coupling groove 630 may be formed in a portion of the area where the lower part 610 of the base 600 and the floor support part 420 of the housing 400 contact. Meanwhile, a coupling protrusion may be provided on the base 600 and a coupling groove may be provided at the bottom of the lateral support portion 420.

The upper support member 700 may be located between the upper part 410 of the housing 400 and the second driving part 500. The upper support member 700 may be partially fixed by the coupling force of the second driving unit 500 coupled to the housing 400. Additionally, a portion of the upper support member 700 may be fixed to the housing 400 and/or the second driving unit 500 by being adhered to the housing 400 and/or the second driving unit 500.

The upper support member 700 may include an elastic member. That is, at least a portion of the upper support member 700 may have elasticity. In this case, the upper support member 700 may be referred to as an upper elastic member. The upper support member 700 may be a leaf spring, as an example. However, it is not limited to this. At least a portion of the upper support member 700 may have a shape corresponding to the lateral support portion 420. Through this, the upper support part 700 can accommodate at least a portion of the side support part 420. Meanwhile, in this case, when an external force is applied to the upper support part 700, the upper support part 700 may be caught by the lateral support part 420 and be prevented from rotating.

The upper support member 700 may include an outer portion 710, an inner portion 720, and a connection portion 730. The upper support member 700 includes an outer portion 710 supported by the housing 400, an inner portion 720 coupled to the bobbin 200, and a connection portion 730 connecting the outer portion 710 and the inner portion 720. may include. At this time, the connection portion 730 of the upper support member 700 may have elasticity. Of course, the entire upper support member 700 may have elasticity.

The upper support member 700 may include at least a portion of an outer portion 710 located between the upper portion 410 and the second driving portion 500. At least a portion of the outer portion 710 may be located between the upper portion 410 and the second driving portion 500. The outer part 710 may be in surface contact with the housing 400 on one side, and may be in surface contact with the second driving part 500 on the other side. The outer part 710 may be fixed between the second driving part 500 and the upper part 410 by the force by which the second driving part 500 is coupled to the housing 400.

The outer portion 710 includes a first outer end 711 located between the first support portion 421 and the second support portion 422, and a second support portion 422 and the third support portion 423. Located between the 2nd outer end 712, the 3rd outer end 713 located between the 3rd support portion 423 and the 4th support portion 424, and the 4th support portion 424 and the first support portion 421. It may include a fourth outer end 714.

The upper support member 700 may include an inner portion 720 coupled to the upper part of the bobbin 200. The inner portion 720 may be coupled to the top of the bobbin 200. A hole may be formed in the inner portion 720, and a protrusion corresponding to the hole may be formed in the bobbin 200. With the protrusion of the bobbin 200 inserted into the hole of the inner portion 720, the inner portion 720 may be coupled to the bobbin 200 by fusing with heat. The inner part 720 may be connected to the outer part 710 through a connection part 730.

The inner part 720 includes a first inner end 721 facing the first outer end 711, a second inner end 722 facing the second outer end 712, and a third outer end 713. ) may include a third inner end 723 facing the fourth inner end 723 and a fourth inner end 724 facing the fourth outer end 714. That is, the inner portion 720 corresponds to the first inner end 721 between the first support portion 421 and the second support portion 422, and the second support portion 422 and the third support portion 423. Between the corresponding third inner end 723, the fourth support part 424, and the first support part 421, between the second inner end 722 and the third support part 423 and the fourth support part 424. It may include a fourth medial end 724 corresponding to.

As an example, the connecting portion 730 includes a first connecting body 731a connecting the second inner end 722 and the third inner end 723 and the first outer end 711, as shown in FIG. 10. It can be included. Additionally, the connecting portion 730 may further include a second connecting body 732a connecting the third inner end 723 and the fourth inner end 724 and the second outer end 712. In this case, the second outer end 712 may be fixed to the housing 400 with an adhesive. Meanwhile, it can be seen that the first connector 731a and the second connector 732a of FIG. 10 are longer than the first connector 731b and the second connector 732b of FIG. 11, which is a modified example. You can. That is, the first connector 731a and the second connector 732a of FIG. 10 are modified to produce the same rigidity as the first connector 731b and the second connector 732b of FIG. 11, which is a modified example. It can be used more broadly than in the example. That is, the embodiment of FIG. 10 has the advantage of being less affected by manufacturing errors.

As a modified example, the connecting portion 730 includes a first connecting member 731b connecting the first outer end 711 and the second inner end 722, and the first outer end 711, as shown in FIG. 11. It may include a second connector 732b connecting the fourth inner end 724. In this case, the connection portion 730 may not be directly connected to the second outer end 722. On the other hand, compared to the example of FIG. 10, the modified example has the advantage that there is no need to fix the second outer end 712 and the fourth outer end 714 to the housing 400 with adhesive.

Adhesive (not shown) may be interposed between the outer portion 710 and the upper portion 410. Alternatively, the adhesive may be interposed between the outer portion 710 and the second driving portion 500. That is, an adhesive may be interposed between the outer part 710 and the upper part 410, or the outer part 710 and the second driving part 500.

A portion of the lower support member 800 may be coupled to the housing 400 or the base 500, and another portion may be coupled to the lower portion of the bobbin 200. A portion of the lower support member 800 may be fixed by a coupling protrusion 427 provided at the lower end of the lateral support portion 420 of the housing 400. A portion of the lower support member 800 may be located between the lateral support portion 420 and the base 600 of the housing 400. The lower support member 800 may movably support the bobbin 200 with respect to the housing 400 and/or the base 500. The lower support member 800 may be formed to press the bobbin 200 downward in an initial state in which no current is applied to the first driving unit 300. Additionally, the upper support member 700 may be formed to press the bobbin 200 downward in an initial state in which no current is applied to the first driving unit 300. Through this, the bobbin 200 can be maintained in contact with the base 600 in its initial state. That is, this embodiment can perform the autofocus function through unidirectional driving. The lower support member 800 may be provided as a pair of lower support members 801 and 802. The lower support members 800 may be provided as a pair and each may be connected to the coil of the first driving unit 300.

The lower support member 800 may include an elastic member as an example. That is, at least a portion of the lower support member 800 may have elasticity. In this case, the lower support member 800 may be referred to as a lower elastic member. The lower support member 800 may be a leaf spring, as an example. However, it is not limited to this.

The lower support member 800 may include an outer portion 810, an inner portion 820, and a connection portion 830.

The lower support member 800 may include an outer portion 810 coupled to one or more of the housing 400 and the base 600. The outer portion 810 may be coupled to one or more of the housing 400 and the base 600. The outer portion 810 may be fixed by the engaging protrusion 427 of the lateral support portion 420. The outer portion 810 may include a hole inserted into the coupling protrusion 427 of the lateral support portion 420.

Each of the pair of lower support members 801 and 802 may include a terminal portion 811 that is bent downward and accommodated in the terminal receiving portion 612 of the base 600. The terminal portion 811 may be bent and extended from the outer portion 810. At least a portion of the terminal portion 811 may be accommodated in the terminal receiving portion 612 of the base 600. The terminal portion 811 may be a banding spring terminal manufactured by a bending method.

The lower support member 800 may include an inner portion 820 coupled to the bobbin 200. The inner portion 820 may be coupled to the bobbin 200. The inner portion 820 may include a hole, and the bobbin 200 may include a protrusion. In this case, the protrusion of the bobbin 200 may be inserted and coupled to the hole of the inner portion 820. The inner part 820 may be coupled to the bobbin 200 by being fused by heat while the protrusion of the bobbin 200 is inserted into the hole of the inner part 820.

The lower support member 800 may include a connection portion 830 connecting the outer portion 810 and the inner portion 820. The connection part 830 may include an outer part 810 and an inner part 820. The connection portion 830 may have elasticity. Of course, the outer portion 810, the inner portion 820, and the connecting portion 830 may all have elasticity.

In this embodiment and the modified example, after seating the cover member 100 as shown in (a) of FIG. 13 and positioning the housing 400 inside the cover member 100, the housing 400 is placed as shown in (b). After seating the upper support member 700, the housing assembly can be assembled by fastening the magnet of the second driving unit 500 as shown in (c).

Compared to the prior art, this embodiment has the advantage that fixing work such as a fusion process for fixing the upper support member 700 to the housing 400 is unnecessary. Additionally, in this embodiment, since the magnet is assembled in the vertical direction of the housing 400, it has the advantage of being easier to assemble compared to the case where the magnet is assembled from the side of the housing 400.

In this embodiment, as an example, the magnet is placed on only two of the four sides of the housing 400 and the side plate 430 is placed on the remaining two sides, thereby reducing the risk of foreign matter flowing into the side of the housing 400. (risk) is reduced.

Meanwhile, as an example, when using the upper support member 700 as shown in FIG. 10, the length of the upper support member 700 can be extended and the width can be wide, thereby minimizing the impact of rigidity due to manufacturing tolerances. In addition, when using the upper support member 700 as shown in FIG. 11 as a modified example, the advantage is that there is no need to separately bond the outer portion 810, which is not directly connected to the connecting portion 830, to the housing 400. there is.

In this embodiment, by making the inner diameter of the housing 400 smaller than the outer diameter of the bobbin 200, the phenomenon of foreign substances penetrating from the upper side can be minimized.

In this embodiment, the number of people manufacturing the housing assembly can be reduced to 6 people. 1 person for seating the cover member 100, 1 person for seating the housing 400, 1 person for seating the upper support member 700, 1 person for bond application, 1 person for magnet assembly, and 1 person for additional bond application. A housing assembly can be manufactured with only 6 people. In addition, in this embodiment, compared to the prior art, the effects of reducing jig costs, reducing unit costs of housing 400 and magnet products, and reducing sub-assembly defect loss can be expected.

In the above, just because all the components constituting the embodiment of the present invention have been described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, as long as it is within the scope of the purpose of the present invention, all of the components may be operated by selectively combining one or more of them. In addition, terms such as “include,” “comprise,” or “have” described above mean that the corresponding component may be present, unless specifically stated to the contrary, and therefore do not exclude other components. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

100: cover member 200: bobbin
300: first driving unit 400: housing
500: second driving unit 600: base
700: upper support member 800: lower support member

Claims (1)

Base;
a cover member including an upper plate and an outer plate extending from the upper plate and disposed on the base;
a bobbin disposed within the cover member;
a housing disposed between the cover member and the bobbin;
a coil disposed on the bobbin;
a magnet disposed between the coil and the outer plate of the cover member and facing the coil; and
Includes an upper elastic member connecting the bobbin and the housing,
The housing includes an upper portion disposed between the upper plate of the cover member and the magnet, and a lateral support portion extending downward from the upper portion,
The lateral supports of the housing include four lateral supports disposed at four corner areas of the cover member,
The base protrudes upward and includes an extension at least a portion disposed between the outer plate of the cover member and the lateral support portion of the housing,
The four lateral supports of the housing include first and third supports arranged diagonally from each other, and second and fourth supports arranged diagonally from each other,
The magnet includes a first magnet disposed between the first support portion and the second support portion, and a second magnet disposed between the third support portion and the fourth support portion,
A magnet is not disposed between the second support part and the third support part of the housing,
The housing is a lens driving unit including a first plate that is formed integrally with the second support portion and the third support portion and connects the second support portion and the third support portion.