Aperture module and camera module including same

Abstract

Disclosed are an aperture module and a camera module including the aperture module, the aperture module including: a base portion including a guide groove and a protruding pivot pin; a blade unit including a plurality of blades that pivot to form a first diameter aperture and a second diameter aperture; and an aperture driver including a driving pin that moves along the guide groove. The drive hole includes a first end portion contacting the drive pin when the first diameter aperture is formed and a second end portion contacting the drive pin when the second diameter aperture is formed, and a central portion connecting the first end portion and the second end portion. A width of a central portion of the driving hole in a first direction is greater than a maximum width of the first end portion and a maximum width of the second end portion, the first direction being perpendicular to a center line connecting two points at a maximum distance between the first end portion and the second end portion.

Description

Technical Field

[0001] The following description relates to an aperture module and a camera module including the aperture module. Background Art

[0002] The camera may be implemented in a portable electronic device such as, but not limited to, a smartphone, a tablet personal computer (PC), or a laptop computer. As competition for product differentiation of portable electronic devices intensifies, there are more and more examples of applying the operation of a general digital camera to the camera of a portable electronic device. Among them, the demand for adjusting the amount of light by changing the aperture to obtain a bokeh effect or to obtain bright and clear photos is also increasing.

[0003] The variable aperture can control the amount of light by changing the size of the incident hole using a plurality of blades. The blades can be combined with a driving pin formed in the aperture module and can be driven, and when the blades fall and impact occurs, the blades may be deformed by the driving pin. Therefore, it is necessary to develop an aperture with less deformation for impact.

[0004] The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above may be applicable as prior art with respect to the present disclosure. Summary of the invention

[0005] The purpose of providing this summary is to introduce a selection of inventive concepts in a concise form, and these inventive concepts will be further described in the following detailed description. This summary is not intended to identify the key features or essential features of the subject matter claimed, nor is it intended to help determine the scope of the subject matter claimed.

[0006] In a general aspect, an aperture module includes: a base portion including a guide groove and a protruding pivot pin arranged in a corner area of ​​the base portion; a blade unit including a plurality of blades each having a drive hole overlapping at least a portion of the guide groove, and configured to pivot relative to the pivot pin to form an aperture of a first diameter and an aperture of a second diameter; and an aperture driver including a drive pin configured to penetrate the guide groove and the drive hole, and configured to move along the guide groove, wherein the drive hole includes a first end portion contacting the drive pin when forming an aperture of the first diameter, a second end portion facing the first end portion and contacting the drive pin when forming an aperture of the second diameter, and a center portion connecting the first end portion and the second end portion, and wherein a width of the center portion of the drive hole in a first direction is greater than a maximum width of the first end portion and a maximum width of the second end portion, and the first direction is perpendicular to a center line connecting two points with a maximum distance between the first end portion and the second end portion.

[0007] The driving hole may include a width of the driving hole in the first direction that increases as approaching the central portion from at least one of the first end portion and the second end portion.

[0008] The driving hole may include a portion where a width of the driving hole in the first direction increases in a second direction parallel to the center line and then decreases.

[0009] The drive pin may have a diameter that is smaller than a width of the central portion in the first direction.

[0010] A line tangent to the edge of the central portion may be inclined to have an angle with respect to the central line.

[0011] The curvature of the edge of the first end portion and the curvature of the edge of the second end portion may be greater than the curvature of the central portion.

[0012] The aperture driver may further include a moving member configured to move back and forth in a straight line to move the driving pin, and an aperture driving magnet installed in the moving member and disposed to face the aperture driving coil.

[0013] The driving pin may protrude upward from an upper end of the moving member.

[0014] The drive hole may be linearly symmetric about the center line.

[0015] The plurality of blades may be a pair of blades.

[0016] The curvature of the edge of the first end and the curvature of the edge of the second end may be equal to the curvature of the drive pin.

[0017] The central portion may include a portion whose width in the first direction increases toward a corresponding side of the driving hole relative to the center line.

[0018] In a general aspect, a camera module includes a housing, a lens driving module, and an aperture module, the housing having an internal space, the lens driving module being disposed in the internal space of the housing and being configured to be driven in at least one of an optical axis direction and a direction perpendicular to the optical axis direction, the aperture module being disposed at a front end of the lens driving module and being configured to adjust the size of an incident aperture, wherein the aperture module includes: a base portion including a guide groove and a protruding pivot pin disposed in a corner region of the base portion; a blade unit including a plurality of blades each having a driving hole overlapping at least a portion of the guide groove and being configured to pivot relative to the pivot pin to form an aperture of a first diameter and an aperture of a second diameter, and an aperture driver including a driving pin disposed in the guide groove and the driving hole and being configured to move along the guide groove, wherein the driving hole includes a first end portion contacting the driving pin when forming an aperture of the first diameter, a second end portion facing the first end portion and contacting the driving pin when forming an aperture of the second diameter, and a center portion connecting the first end portion and the second end portion, and wherein a width of the center portion of the driving hole in a first direction is greater than a maximum width of the first end portion and a maximum width of the second end portion, and the first direction is perpendicular to a center line connecting two points with a maximum distance between the first end portion and the second end portion.

[0019] The driving hole may include a portion where a width of the driving hole in the first direction increases as approaching the central portion from at least one of the first end portion and the second end portion.

[0020] The driving hole may include a portion where a width of the driving hole in the first direction increases in a second direction parallel to the center line and then decreases.

[0021] The drive pin may have a diameter that is smaller than a width of the central portion in the first direction.

[0022] A line tangent to the edge of the central portion may be inclined to have an angle with respect to the central line.

[0023] The aperture driver may further include a moving member configured to move back and forth in a straight line to move the driving pin, and an aperture driving magnet installed in the moving member and disposed to face the aperture driving coil.

[0024] The drive hole may be linearly symmetric about the center line.

[0025] The lens driving module may include: an autofocus (AF) bearing part, configured to accommodate a lens barrel; an AF driver, disposed outside the AF bearing part and configured to move the lens barrel and the AF bearing part in the optical axis direction; an optical image stabilization (OIS) bearing part, disposed in the AF bearing part; and an OIS driver, disposed outside the OIS bearing part and configured to move the OIS bearing part in a direction perpendicular to the optical axis direction.

[0026] The aperture driver, the AF driver, and the OIS driver may be respectively disposed on different sides of the housing.

[0027] Other features and aspects will be apparent from the following detailed description, the accompanying drawings, and the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A perspective view of the exterior of an exemplary camera module is shown in accordance with one or more embodiments.

[0029] Figure 2 Shows Figure 1 An exploded perspective view of an exemplary camera module is shown in FIG.

[0030] Figure 3 A perspective view of a portion of an exemplary camera module is shown in accordance with one or more embodiments.

[0031] Figure 4 Shows Figure 2 The assembled stereogram of the aperture module shown in FIG. 1 after the aperture cover is removed.

[0032] Figure 5 Shows Figure 4 An exploded perspective view of the disassembled aperture module is shown in FIG.

[0033] Figure 6 Shows Figure 2 FIG. 4 is a top plan view of an arrangement of blade units of an aperture module on a base portion for forming an aperture of a first diameter.

[0034] Figure 7 Shows Figure 2 FIG. 1 is a top plan view of an arrangement of blade units of an aperture module on a base portion for forming an aperture of a second diameter.

[0035] Figure 8 A top plan view of an enlarged portion of a blade is shown.

[0036] Fig. 9 An enlarged view of a drive hole according to a variation is shown.

[0037] Fig.10 The maximum deformation of the driving hole when the camera module is lowered is shown.

[0038] Fig.11 The friction force of the drive hole according to the comparative example and the embodiment is shown.

[0039] Throughout the drawings and detailed description, unless otherwise described, the same reference numerals refer to the same elements. For purposes of clarity, illustration, and convenience, the drawings may not be drawn to scale, and the relative sizes, proportions, and depictions of elements in the drawings may be exaggerated. DETAILED DESCRIPTION

[0040] Hereinafter, although examples of the present disclosure will be described in detail with reference to the accompanying drawings, it should be noted that the examples are not limited thereto.

[0041] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described in this application. However, various changes, modifications and equivalences of the methods, devices and / or systems described in this disclosure will be apparent after understanding the disclosure of this application. For example, the order of operations described in this disclosure is merely an example, and except for operations that must occur in a specific order, it is not limited to the order set forth in this application, but can be changed, which will be apparent after understanding the disclosure of this application. In addition, for greater clarity and brevity, the description of features well known in the art may be omitted.

[0042] The features described in this application can be implemented in different forms and should not be understood as being limited to the examples described in this application. Rather, the examples described in this application are provided only to illustrate some of the many possible ways to implement the methods, devices and / or systems described in this application, which will be apparent after understanding the disclosure of this disclosure.

[0043] Throughout the specification, when an element such as a layer, a region, or a substrate is described as being “on,” “connected to,” or “coupled to” another element, the element may be directly “on,” “connected to,” or “coupled to” the other element, or one or more other elements may be present between the element and the other element. Conversely, when an element is described as being “directly on,” “directly connected to,” or “directly coupled to” another element, there are no other elements between the element and the other element.

[0044] As used in this application, the term "and / or" includes any one of the associated listed items and any combination of any two or more items; similarly, "at least one of..." includes any one of the associated listed items and any combination of any two or more items.

[0045] The phrase “in a plan view” or “on a plane” means observing a target portion from the top, and the phrase “in a sectional view” or “on a section” means observing a section formed by vertically cutting the target portion from the side.

[0046] Although the terms "first", "second" and "third" may be used in this application to describe various members, components, regions, layers or parts, these members, components, regions, layers or parts are not limited by these terms. More specifically, these terms are only used to distinguish one member, component, region, layer or part from another member, component, region, layer or part. Therefore, without departing from the teachings of the examples described in this application, the first member, first component, first region, first layer or first part mentioned in these examples may also be referred to as the second member, second component, second region, second layer or second part.

[0047] Spatially relative terms such as "above", "higher", "below", "lower", etc. may be used in this application for descriptive convenience to describe the relationship of one element relative to another element as shown in the accompanying drawings. In addition to covering the orientations depicted in the accompanying drawings, these spatially relative terms are intended to also cover different orientations of the device in use or operation. For example, if the device in the accompanying drawings is flipped, an element described as being "above" or "higher" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" covers both orientations of "above" and "below". The device may also be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used in this application should be interpreted accordingly.

[0048] The terms used in this application are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the words "a", "an" and "the" are intended to also include plural forms. The words "comprise", "include" and "have" indicate the presence of the features, numbers, operations, components, elements and / or combinations thereof described, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or combinations thereof.

[0049] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described in the present application are not limited to the specific shapes shown in the drawings, but include variations in shapes that occur during manufacturing.

[0050] It should be noted that in this application, the use of the word “may” with respect to an example, for example, regarding what an example may include or implement, means that there is at least one example in which such feature is included or implemented, and all examples are not limited thereto.

[0051] The features of the examples described in this application can be combined in various ways, which will be apparent after understanding the present disclosure. In addition, although the examples described in this application have multiple configurations, other configurations that will be apparent after understanding the present disclosure are also possible.

[0052] One or more examples may provide an aperture module that reduces deformation of blades caused by impact when falling, and a camera module including the aperture module.

[0053] One or more examples may reduce blade deformation caused by impact in the event of a drop, thereby increasing drop reliability and reducing the risk of bad actuation.

[0054] Figure 1 shows a perspective view of the exterior of an exemplary camera module according to one or more embodiments, Figure 2 Shows Figure 1 An exploded perspective view of an exemplary camera module shown in FIG. Figure 3 A perspective view showing a portion of a camera module according to an embodiment.

[0055] refer to Figures 1 to 3 , an exemplary camera module 100 may include a lens barrel 110, a lens driving module 150 that moves the lens barrel 110, an aperture module 300 that adjusts the size of an incident hole, and an image sensor unit that converts incident light into an electrical signal. The lens barrel 110 and the lens driving module 150 are housed or disposed in a housing 101 together with the aperture module 300. The housing 101 is covered by a cover 103.

[0056] The lens barrel 110 may have a hollow space in a cylindrical shape to accommodate a lens for subject photography in the lens barrel 110, and the lens may be installed along an optical axis in the lens barrel 110. According to an embodiment of the lens barrel 110, a desired number of lenses may be provided, and the respective lenses may have optical characteristics such as the same or different refractive indices.

[0057] The lens driving module 150 may install the lens barrel 110 therein and may move the lens barrel 110, and may include an auto focus (AF) unit 130 that adjusts the focus and an optical image stabilization (OIS) unit 120 that corrects hand shaking or shaking. In an example, the lens driving module 150 may adjust the focus by moving the lens barrel 110 in the optical axis direction (z-axis direction in the figure) using the AF unit 130, or may implement a zoom operation, and may correct hand shaking or shaking at the time of shooting by moving the lens barrel 110 in a direction perpendicular to the optical axis direction (x-axis direction or y-axis direction in the figure) using the OIS unit 120.

[0058] The AF unit 130 includes an AF bearing portion 131 that accommodates the lens barrel 110 and an AF driver that generates a driving force to move the lens barrel 110 and the AF bearing portion 131 in the optical axis direction. The AF driver may be disposed outside the AF bearing portion 131. The AF driver may include an AF driving magnet 133b and an AF driving coil 133a. The AF driving magnet 133b may be mounted on one side of the AF bearing portion 131, and the AF driving coil 133a may be mounted in the housing 101 with the circuit board 105 as a medium. One or more rolling members 135 in a spherical shape may be disposed between the AF bearing portion 131 and the housing 101 to reduce friction between the AF bearing portion 131 and the housing 101 when the AF bearing portion 131 moves.

[0059] The OIS unit 120 may include an OIS carrier 121 that guides the movement of the lens barrel 110 and an OIS driver that generates a driving force to move the OIS carrier 121 in a direction perpendicular to the optical axis direction. The OIS carrier 121 may be housed or disposed in the AF carrier 131, may be arranged in the optical axis direction, and may guide the movement of the lens barrel 110. The OIS carrier 121 may include a central opening into which the lens barrel 110 is inserted, and the lens barrel 110 may be combined and fixed to the OIS carrier 121 through the central opening.

[0060] The OIS driver may be disposed outside the OIS carrier 121. The OIS driver may include a first OIS driver and a second OIS driver, the first OIS driver including a first OIS driving coil 141a and a first OIS driving magnet 141b, and the second OIS driver including a second OIS driving coil 142a and a second OIS driving magnet 142b. The first OIS driving magnet 141b and the second OIS driving magnet 142b may be installed in the OIS carrier 121, and the first OIS driving coil 141a and the second OIS driving coil 142a facing the first OIS driving magnet 141b and the second OIS driving magnet 142b, respectively, may be installed to be fixed to the housing 101 with the circuit board 105 as a medium.

[0061] The first OIS driver may generate a driving force in an x-axis direction perpendicular to the optical axis direction, and the second OIS driver may generate a driving force in a y-axis direction perpendicular to the optical axis and the x-axis direction. A rolling member 125 having a spherical shape may be provided between the AF bearing portion 131 and the OIS bearing portion 121 to allow the constituent elements of the OIS unit 120 to move smoothly.

[0062] The image sensor unit converts light input through the lens barrel 110 into an electrical signal. In an example, the image sensor unit may include an image sensor (not shown) and a printed circuit board 175 connected to the image sensor, and may further include an infrared filter (not shown). The infrared filter may block light in the infrared region of the light input through the lens barrel 110.

[0063] refer to Figure 2 , the aperture module 300 applied to the camera module 100 may be disposed at the upper end of the lens driving module 150, and may be disposed at the upper end of the lens driving module 150 relative to the light incident direction. The aperture module 300 may be combined to the lens driving module 150, and may be moved in the optical axis direction and in a direction perpendicular to the optical axis direction. The aperture module 300 may selectively change the incident amount of light input to the lens driving module 150.

[0064] The aperture module 300 may include an aperture driver 320 extending from an edge on one side to the bottom side of the housing 101, and the aperture driver 320 is accommodated in the internal space of the housing 101. The aperture driver 320 may include an aperture drive coil 321a installed in the housing 101 with the circuit board 105 as a medium, an aperture drive magnet 321b facing the aperture drive coil 321a, and a moving member 321. The aperture drive magnet 321b may be installed in the moving member 321, and may move back and forth in a straight line.

[0065] The aperture driver 320, the AF driver, and the OIS driver may be disposed on different sides of the housing 101. In an example, the housing 101 may include a first side to a fourth side parallel to the optical axis (z axis). The aperture driver 320 may be disposed on the first side of the housing 101, and the AF driver may be disposed on the second side of the housing 101 close to the first side. The OIS driver may be disposed on a third side of the housing 101 facing the first side and a fourth side facing the second side.

[0066] When a voltage is applied to the aperture driving coil 321a, the moving member 321 in which or on which the aperture driving magnet 321b is mounted can move back and forth in a straight line in a direction perpendicular to the optical axis direction based on the electromagnetic influence between the aperture driving magnet 321b and the aperture driving coil 321a. The moving member 321 can be connected to a base 310 such as Figure 4 The plurality of blades 351 and 352 shown in the figure provide a driving force. The linear back-and-forth motion of the moving member 321 can be converted into the pivoting motion of the blades 351 and 352, and the incident hole size of the aperture module 300 can be adjusted.

[0067] Figure 4 Shows Figure 2A combined stereogram of the exemplary aperture module shown in FIG. 1 with the aperture cover removed, and Figure 5 Shows Figure 4 An exploded perspective view of an exemplary disassembled aperture module is shown in FIG.

[0068] refer to Figure 4 and Figure 5 , the blade unit 350 may be provided on the base part 310 in the aperture module 300. The blade unit 350 may include a plurality of blades 351 and 352. One blade unit 350 is shown. However, this is a non-limiting example, and a plurality of blade units may be sequentially stacked in the optical axis direction to configure the aperture module. In a non-limiting example, the plurality of blades 351 and 352 may be a pair of blades 351 and 352.

[0069] The base 310 may include a pivot pin 311 and may include a central opening 310a. The pivot pin 311 may protrude in the optical axis direction in a corner region of the base 310, and in an example, a plurality of blades 351 and 352 may be combined to the pivot pin 311. Therefore, the plurality of blades 351 and 352 may have pivot pin holes 351a and 352a, respectively.

[0070] The aperture module 300 may include an aperture driver 320 disposed on one edge of the base 310. The aperture driver 320 may include a moving member 321 that moves back and forth in a straight line parallel to one edge of the base 310, and an aperture driving magnet 321b may be installed in or on the moving member 321. A rolling member 325 having a spherical shape may be provided between the base 310 and the moving member 321 to allow the moving member 321 to move smoothly. Figure 3 and Figure 4 , the aperture driving coil 321a may be spaced apart from the aperture driving magnet 321b at a predetermined interval to be opposite to each other.

[0071] The aperture driver 320 may include a driving pin 323 protruding upward from the upper end of the moving member 321. The base 310 may include a base guide groove 310b in a corner region of the base 310 in which the pivot pin 311 is provided, and the driving pin 323 may penetrate the base guide groove 310b and may protrude upward in the optical axis direction. Therefore, the driving pin 323 of the aperture driver 320 may be guided along a path formed by the base guide groove 310b and may then move. The base guide groove 310b may extend parallel to one edge of the base 310.

[0072] In a non-limiting example, the base portion 310 may have a square or rectangular shape in a plan view. The base portion 310 may be recessed downward in the entire region except for the border along the upper edge in the optical axis direction, and the aperture cover 309 may be combined to the upper end of the base portion 310 and may cover the upper end of the base portion 310, thereby protecting the constituent elements of the aperture module 300. The recessed depth of the base portion 310 may be equal to or at least greater than the entire thickness of the blade unit 350.

[0073] Regarding the aperture cover 309, the cover pivot pin hole 309a may be provided in an area corresponding to the pivot pin 311 so that the pivot pin 311 can be inserted into the cover pivot pin hole 309a. Regarding the aperture cover 309, the cover guide groove 309b may be provided in an area corresponding to the base guide groove 310b so that the drive pin 323 can be inserted into the cover guide groove 309b.

[0074] Figure 6 Shows Figure 2 A top plan view of an arrangement of blade units of the aperture module on a base portion for forming an aperture of a first diameter, and Figure 7 Shows Figure 2 FIG. 4 is a top plan view of an arrangement of blade units of an aperture module on a base portion for forming an aperture of a second diameter.

[0075] refer to Figure 6 and Figure 7 , a plurality of blades 351 and 352 may be provided on the base 310 when the pivot pin 311 is inserted into the pivot pin holes 351a and 352a. The plurality of blades 351 and 352 include a lower blade 351 and an upper blade 352, and in an example, the upper blade 352 may be provided on the lower blade 351.

[0076] The plurality of blades 351 and 352 may include a pair of driving portions 3511 and 3521 and a pair of shielding portions 3512 and 3522 extending semi-circularly from the driving portions 3511 and 3521, the pair of driving portions 3511 and 3521 overlap each other and their overlapping area changes with the movement of the driving pin 323. The pair of shielding portions 3512 and 3522 may rotate relative to the pivot pin 311 with the movement of the driving pin 323, and may at least partially shield the central opening 310a from the edge to form an aperture 350a having a first diameter (also referred to as a “first diameter aperture”) and an aperture 350b having a second diameter different from the first diameter (also referred to as a “second diameter aperture”).

[0077] A pair of driving parts 3511 and 3521 may include pivot pin holes 351a and 352a and driving holes 351b and 352b, respectively. With respect to a pair of driving parts 3511 and 3521, the pivot pin holes 351a and 352a may overlap each other, and the driving holes 351b and 352b may be formed to be linearly symmetrical with the base guide groove 310b, and the driving holes 351b and 352b may overlap at least a portion of the base guide groove 310b. With respect to a pair of shielding parts 3512 and 3522, the concave edges forming the first diameter aperture 350a may face each other.

[0078] The driving pin 323 may move along the base guide groove 310 b , the driving holes 351 b and 352 b , and the cover guide groove 309 b as the moving member 321 of the iris driver 320 moves.

[0079] refer to Figure 6 , when the incident hole of the aperture module 300 is at least partially blocked, a pair of driving parts 3511 and 3521 and a pair of blocking parts 3512 and 3522 of the plurality of blades 351 and 352 may overlap with each other to form a first diameter aperture 350a. The driving pin 323 may be disposed at one end of the driving holes 351b and 352b of the plurality of blades 351 and 352. Therefore, the aperture module 300 may form a first diameter aperture 350a having a diameter smaller than that of the central opening 310a.

[0080] refer to Figure 7 , when the incident hole of the aperture module 300 is opened, the plurality of blades 351 and 352 may be expanded to the corresponding sides compared to the example of forming the first diameter aperture 350a. The driving pin 323 may be provided at the other end of the driving holes 351b and 352b of the plurality of blades 351 and 352. Therefore, the aperture module 300 may form a second diameter aperture 350b having an incident hole having a larger diameter than the first diameter aperture 350a.

[0081] refer to Figure 8 and Fig. 9 , the driving holes 351b and 352b will now be described in detail. Figure 8 A top plan view showing an enlarged portion of a blade, and Fig. 9 An enlarged view of a drive hole according to a variation is shown. Figure 8 The arrangement of the drive pins 323 for forming a first diameter aperture and a second diameter aperture is shown.

[0082] The driving holes 351b and 352b may include first end portions 351b1 and 352b1 and second end portions 351b2 and 352b2 facing each other and central portions 351b3 and 352b3 connecting the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2.

[0083] The drive pin 323 may be disposed in a first state (or in a first position) to form a first diameter aperture 350a (see Figure 6 The drive pin 323 may be set in a second state (or in a second position) to form a second diameter aperture 350b (see Figure 7 ). For better understanding and ease of description, the driving pin 323 in the first state (or first position) will be referred to as the first driving pin 3231, and the driving pin 323 in the second state (or second position) will be referred to as the second driving pin 3232.

[0084] The width of the drive holes 351b and 352b in the first direction may be different according to the second direction, the first direction is perpendicular to the center line generated by connecting the two points with the maximum distance between the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2, and the second direction is parallel to the center line. The center line may coincide with a line connecting the center of the first drive pin 3231 and the center of the second drive pin 3232.

[0085] The drive holes 351b and 352b may have first ends 351b1 and 352b1 that contact the first drive pin 3231. In other words, in the first state where the drive pin 323 is set to form the first diameter aperture 350a, the drive pin 323 may contact the first ends 351b1 and 352b1. The first ends 351b1 and 352b1 may include one end (i.e., the first end) of the drive holes 351b and 352b in the second direction. The edges of the first ends 351b1 and 352b1 may be curved so that the first drive pin 3231 can be well set. The curvature of the edges of the first ends 351b1 and 352b1 may be equal to the curvature of the drive pin 323.

[0086] The drive holes 351b and 352b may have second ends 351b2 and 352b2 that contact the second drive pin 3232. In other words, in the second state where the drive pin 323 is arranged to form the second diameter aperture 350b, the drive pin 323 may contact the second ends 351b2 and 352b2. The second ends 351b2 and 352b2 may include the other end (i.e., the second end) of the drive holes 351b and 352b in the second direction. The edges of the second ends 351b2 and 352b2 may be curved so that the second drive pin 3232 may be appropriately disposed therein. The curvature of the edges of the second ends 351b2 and 352b2 may be equal to the curvature of the drive pin 323.

[0087] The driving holes 351b and 352b may have central portions 351b3 and 352b3 connecting the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2. The central portions 351b3 and 352b3 may include other portions except the first end and the second end of the driving holes 351b and 352b in the second direction. In the example, the edges of the central portions 351b3 and 352b3 may be curved. However, this is merely an example, and the example is not limited thereto. The curvature of the edges of the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2 may be greater than the curvature of the edges of the central portions 351b3 and 352b3.

[0088] When the edges of the center portions 351b3 and 352b3 are curved, they may have various curvature values. Figure 8 As shown in FIG, the edges of the center portions 351b3 and 352b3 may have relatively small curvatures. Fig. 9 ,and Figure 8 In contrast, the edges of the center portions 351b3 and 352b3 may have a relatively large curvature. Figure 8 In contrast, the maximum width of the center portions 351b3 and 352b3 in the first direction may have a larger value. The lengths of the edges of the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2 may be within a half of the circumferential length of the driving pin 323 .

[0089] Regarding the width in the first direction, the central portions 351b3 and 352b3 may have a portion having a width greater than the maximum width of the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2. In addition, regarding the width in the first direction, the maximum width of the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2 may be smaller than the width of the central portions 351b3 and 352b3. The central portions 351b3 and 352b3 may extend to obtain an additional space in addition to the moving path of the driving pin 323. Since the above-mentioned width of the center parts 351b3 and 352b3 is greater than the above-mentioned width of the first ends 351b1 and 352b1 and the second ends 351b2 and 352b2, sufficient space can be obtained to drive the driving pin 323, and the driving pin 323 can move along the edges of the center parts 351b3 and 352b3 when falling, thereby reducing the impact applied to the driving holes 351b and 352b.

[0090] The drive holes 351b and 352b may include a portion whose width in the first direction increases when approaching the center portions 351b3 and 352b3 from at least one of the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2. In addition, the drive holes 351b and 352b may include a portion whose width in the first direction increases in the second direction and then decreases. The center portions 351b3 and 352b3 may have a portion whose width in the first direction gradually decreases when approaching the first end portions 351b1 and 352b1. The center portions 351b3 and 352b3 may have a portion whose width in the first direction gradually decreases when approaching the second end portions 351b2 and 352b2. The center portions 351b3 and 352b3 may include a portion whose width in the first direction increases toward the corresponding side relative to the center line. The center portions 351b3 and 352b3 may include a portion whose width in the first direction decreases from the corresponding side relative to the center line. The central portions 351 b 3 and 352 b 3 may include portions whose widths in the first direction increase on respective sides with respect to the center line and then decrease.

[0091] The diameter of the driving pin 323 may be smaller than the width of the central portions 351b3 and 352b3 in the first direction. The driving holes 351b and 352b may be linearly symmetrical with respect to the center line. The driving pin 323 may move back and forth between the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2.

[0092] Fig.10 shows the maximum deformation of the driving hole when the camera module falls, and Fig.11 The friction force of the drive hole according to the comparative example and the embodiment is shown.

[0093] Fig.10 The simulation results of the deformation of the drive holes 351b and 352b caused by the impact applied to the drive holes 351b and 352b by the drive pin 323 when the camera module 100 falls in the direction perpendicular to the optical axis direction (x-axis direction or y-axis direction) are shown. In detail, when the aperture module 300 according to the embodiment or the camera module 100 including the aperture module 300 falls in the falling direction of the x-axis direction or the y-axis direction, the moving member 321 and the blade unit 350 may fall together in the falling direction. When the base 310 collides with the ground, the blade unit 350 connected to the base 310 moves in the direction opposite to the falling direction (i.e., changes its moving direction), but the moving member 321 not connected to the base 310 may move in the falling direction due to inertia. Therefore, when the drive pin 323 connected to the moving member 321 moves along the falling direction, the blade unit 350 does not rotate, and the drive holes 351b and 352b may be deformed.

[0094] refer to Fig.10 , in a large aperture state such as the second diameter aperture 350b, the angle between one edge of the driving holes 1351b and 1352b according to the comparative example and the reference line parallel to the falling direction is 59.5°, and the relative value of the maximum deformation amount of the driving holes 1351b and 1352b provided on the blade unit according to the comparative example is 1, which will be compared with other examples. The maximum deformation amount may mean the square root of the value added after each of the deformation amounts of the driving holes 1351b, 1352b, 351b, and 352b in the x-axis direction, the y-axis direction, and the z-axis direction is squared.

[0095] In a large aperture state such as the second diameter aperture 350b, the angle between one edge of the driving holes 351b and 352b according to the embodiment and the reference line may be smaller than the angle between one edge of the driving holes 1351b and 1352b according to the comparative example and the reference line, for example, it may be 39°. In detail, the angle between one edge of the central portion 351b3 and 352b3 according to the embodiment and the reference line may be smaller than the angle between one edge of the central portion of the driving holes 1351b and 1352b according to the comparative example and the reference line. In other words, unlike the comparative example, the driving holes 351b and 352b according to the embodiment may be tilted so that a line tangent to the edge of the central portion 351b3 and 352b3 may form an angle with the center line.

[0096] The maximum deformation amount of the driving holes 351b and 352b according to the embodiment may be 0.64 in the case of the upper blade 352, and may be 0.58 in the case of the lower blade 351. That is, according to the driving holes 351b and 352b according to the embodiment, deformation of the blade unit 350 and the driving holes 351b and 352b caused by impact when the aperture module 300 falls is reduced compared to the comparative example, thereby increasing the falling reliability and reducing the risk of generating a driving defect.

[0097] In addition, reference Fig.10 , in a small aperture state such as the first diameter aperture 350a, the angle between one edge of the driving holes 1351b and 1352b according to the comparative example and the reference line parallel to the falling direction is 33.9°, and the maximum deformation amount of the driving holes 351b and 352b according to the comparative example can be 0.86 in the case of the upper blade and can be 0.76 in the case of the lower blade.

[0098] In a small aperture state such as the first diameter aperture 350a, the angle between one edge of the driving holes 351b and 352b according to the embodiment and the reference line may be smaller than the angle between one edge of the driving holes 1351b and 1352b according to the comparative example and the reference line, for example, it may be 13.9°. In detail, the angle between one edge of the central portion 351b3 and 352b3 according to the embodiment and the reference line may be smaller than the angle between one edge of the central portion of the driving holes 1351b and 1352b according to the comparative example and the reference line. In other words, unlike the comparative example, the driving holes 351b and 352b according to the embodiment may be tilted so that a line tangent to the edge of the central portion 351b3 and 352b3 may form an angle with the center line.

[0099] The maximum deformation amount of the driving holes 351b and 352b according to the embodiment may be 0.69 in the case of the upper blade 352, and may be 0.47 in the case of the lower blade 351. That is, according to the driving holes 351b and 352b according to the embodiment, deformation of the blade unit 350 and the driving holes 351b and 352b caused by impact when the aperture module 300 falls is reduced compared to the comparative example, thereby increasing the falling reliability and reducing the risk of generating a driving defect.

[0100] refer to Fig.11When the drive holes 351b and 352b according to the embodiment are applied in which the maximum width of the first end portions 351b1 and 352b1 and the second end portions 351b2 and 352b2 are smaller than the width of the center portions 351b3 and 352b3, the normal force applied to the drive pin is reduced compared to the comparative example, the maximum static friction force can be reduced, the drive pin can be easily moved, and the impact applied to the drive hole and the deformation caused by the impact can be reduced.

[0101] Although specific examples have been shown and described above, it will be apparent after understanding the present disclosure that various changes in form and detail may be made in these examples without departing from the spirit and scope of the claims and their equivalents. The examples described in this application should be considered to be merely descriptive in nature and not for limiting purposes. The description of the features or aspects in each example should be considered to be applicable to similar features or aspects in other examples. If the described techniques are performed in a different order, and / or if the components in the described systems, architectures, devices, or circuits are combined in different ways, and / or replaced or supplemented by other components or their equivalents, suitable results may be obtained. Therefore, the scope of the present disclosure is not limited by specific embodiments, but by the claims and their equivalents, and all changes within the scope of the claims and their equivalents should be interpreted as included in the present disclosure.

Claims

1. An aperture module, comprising: a base portion including a guide slot and a protruding pivot pin disposed in a corner region of the base portion; a blade unit including a plurality of blades each having a drive hole overlapping at least a portion of the guide slot and configured to pivot relative to the pivot pin to form an aperture of a first diameter and an aperture of a second diameter; an aperture driver including a drive pin disposed in the guide slot and the drive hole and configured to move along the guide slot; and An aperture cover is assembled to the upper end of the base portion. wherein the drive hole includes a first end portion contacting the drive pin when forming the aperture of the first diameter, a second end portion facing the first end portion and contacting the drive pin when forming the aperture of the second diameter, and a central portion connecting the first end portion and the second end portion, and The width of the central portion of the driving hole in a first direction is greater than the maximum width of the first end and the maximum width of the second end, and the first direction is perpendicular to a center line connecting two points with a maximum distance between the first end and the second end.

2. The aperture module according to claim 1, wherein: The driving hole includes a portion where a width of the driving hole in the first direction increases as approaching the center portion from at least one of the first end portion and the second end portion.

3. The aperture module according to claim 1, wherein: The driving hole includes a portion where a width of the driving hole in the first direction increases in a second direction parallel to the center line and then decreases.

4. The aperture module according to claim 1, wherein: The drive pin has a diameter that is smaller than the width of the central portion in the first direction.

5. The aperture module according to claim 1, wherein: A line tangent to an edge of the central portion is inclined to have an angle with respect to the center line.

6. The aperture module according to claim 1, wherein: A curvature of an edge of the first end portion and a curvature of an edge of the second end portion are greater than a curvature of the central portion.

7. The aperture module according to claim 1, wherein: The aperture driver further comprises: a moving member configured to move back and forth in a straight line to move the driving pin, and The aperture drive magnet is installed in the moving member and is disposed to face the aperture drive coil.

8. The aperture module according to claim 7, wherein: The driving pin protrudes upward from an upper end of the moving member.

9. The aperture module according to claim 1, wherein: The driving hole is linearly symmetrical with respect to the center line.

10. The aperture module according to claim 1, wherein: The plurality of blades is a pair of blades.

11. The aperture module according to claim 1, wherein: The curvature of the edge of the first end and the curvature of the edge of the second end are equal to the curvature of the drive pin.

12. The aperture module according to claim 1, wherein: The central portion includes a portion whose width in the first direction increases toward a corresponding side of the driving hole relative to the center line.

13. A camera module, comprising: A housing having an internal space; a lens driving module disposed in the internal space of the housing and configured to be driven in at least one of an optical axis direction and a direction perpendicular to the optical axis direction; as well as an aperture module, disposed at the front end of the lens driving module and configured to adjust the size of the incident hole, Wherein, the aperture module comprises: a base part, comprising a guide slot and a protruding pivot pin arranged in a corner region of the base part, a blade unit including a plurality of blades each having a drive hole overlapping at least a portion of the guide groove and configured to pivot relative to the pivot pin to form an aperture of a first diameter and an aperture of a second diameter, an aperture driver including a drive pin configured to penetrate the guide groove and the drive hole and configured to move along the guide groove, and An aperture cover is assembled to the upper end of the base portion. wherein the drive hole includes a first end portion contacting the drive pin when forming the aperture of the first diameter, a second end portion facing the first end portion and contacting the drive pin when forming the aperture of the second diameter, and a central portion connecting the first end portion and the second end portion, and The width of the central portion of the driving hole in a first direction is greater than the maximum width of the first end and the maximum width of the second end, and the first direction is perpendicular to a center line connecting two points with a maximum distance between the first end and the second end.

14. The camera module of claim 13, wherein: The driving hole includes a portion where a width of the driving hole in the first direction increases as approaching the center portion from at least one of the first end portion and the second end portion.

15. The camera module of claim 14, wherein: The driving hole includes a portion where a width of the driving hole in the first direction increases in a second direction parallel to the center line and then decreases.

16. The camera module of claim 13, wherein: The drive pin has a diameter that is smaller than the width of the central portion in the first direction.

17. The camera module of claim 13, wherein: A line tangent to an edge of the central portion is inclined to have an angle with respect to the center line.

18. The camera module of claim 13, wherein: The aperture driver further comprises: a moving member configured to move back and forth in a straight line to move the driving pin, and The aperture drive magnet is installed in the moving member and is disposed to face the aperture drive coil.

19. The camera module according to claim 13, wherein: The driving hole is linearly symmetrical with respect to the center line.

20. The camera module of claim 13, wherein: The lens driving module comprises: The auto focus AF bearing portion is configured to accommodate the lens barrel, an AF driver provided outside the AF bearing portion and configured to move the lens barrel and the AF bearing portion in the optical axis direction, an optical image stabilization (OIS) bearing portion, disposed in the AF bearing portion, and The OIS driver is disposed outside the OIS carrier and is configured to move the OIS carrier in a direction perpendicular to the optical axis direction.

21. The camera module according to claim 20, wherein: The iris driver, the AF driver, and the OIS driver are respectively disposed on different sides of the housing.

Images