WO2020243855A1 - 镜头组件 - Google Patents

镜头组件 Download PDF

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Publication number
WO2020243855A1
WO2020243855A1 PCT/CN2019/089718 CN2019089718W WO2020243855A1 WO 2020243855 A1 WO2020243855 A1 WO 2020243855A1 CN 2019089718 W CN2019089718 W CN 2019089718W WO 2020243855 A1 WO2020243855 A1 WO 2020243855A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
ball
side plate
assembly
guide groove
Prior art date
Application number
PCT/CN2019/089718
Other languages
English (en)
French (fr)
Inventor
朱银龙
黄杰
李刚
Original Assignee
瑞声光学解决方案私人有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声光学解决方案私人有限公司 filed Critical 瑞声光学解决方案私人有限公司
Priority to PCT/CN2019/089718 priority Critical patent/WO2020243855A1/zh
Priority to CN201910488231.4A priority patent/CN110261987B/zh
Publication of WO2020243855A1 publication Critical patent/WO2020243855A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing

Definitions

  • the invention relates to the technical field of lens optical imaging, in particular to a lens assembly.
  • high-performance lens modules have been installed on portable terminals such as smart phones and tablet computers.
  • the high-performance lens module generally has autofocus function (auto focusing).
  • the high-performance lens module needs to move the lens along the optical axis of the lens during autofocus.
  • the ball is placed in the raceway of the high-performance lens module, and the ball is used to realize the rolling friction of the lens.
  • the diameter of the ball cannot meet the width of the raceway when the ball achieves the corresponding length, the lens is difficult to adhere to the ball, and the lens is prone to shaking during autofocus.
  • the object of the present invention is to provide a lens assembly with a simple structure, high stability, and a lens that is not prone to shake during the autofocus function.
  • a lens assembly comprising a base, a lens mounted to the base, a driving device and a first ball assembly, the driving device is connected between the base and the lens, the first A ball assembly is provided between the lens and the base for guiding the lens to slide relative to the base along the optical axis of the lens.
  • the first ball assembly includes a first ball and a second ball in contact with each other. A ball, the diameter of the first ball is greater than the diameter of the second ball, and the driving device can drive the lens to move along the optical axis of the lens.
  • the first ball assembly includes two first balls and a second ball, the second ball is located between the two first balls, and the second ball is in contact with the two first balls .
  • the base includes a bottom plate, and a first side plate and a second side plate respectively extending from two opposite sides of the bottom plate.
  • the bottom plate, the first side plate and the second side plate Enclosed to form an accommodation space; the lens is installed in the accommodation space, the optical axis direction of the lens is perpendicular to the bottom plate, and the optical axis direction of the lens is respectively connected to the first side plate and the second side plate parallel.
  • the first side plate is convexly provided with a first convex portion on the side facing the lens
  • the second side plate is convexly provided with a second convex portion on the side facing the lens.
  • Opposite sides of the lens are provided with a third convex portion opposite to the first convex portion and a fourth convex portion opposite to the second convex portion.
  • the first convex portion, the third convex portion, and the first side A first guide groove is enclosed between the plate and the lens, and a second guide groove is enclosed between the second convex portion, the fourth convex portion, the second side plate and the lens.
  • the first guide groove and the lens The first ball components are respectively arranged in the second guide grooves.
  • the first convex portion, the second convex portion, the third convex portion, the fourth convex portion, the first guide groove and the second guide groove respectively include two
  • the lens assembly further includes a second A ball assembly
  • the second ball assembly includes at least one third ball
  • one of the first guide grooves and one of the second guide grooves are respectively provided with a first ball assembly
  • the other of the second guide grooves are respectively provided with second ball components.
  • the first convex portion is provided with a first abutting surface for abutting the first ball assembly
  • the second convex portion is provided with a second abutting surface for abutting the second ball assembly
  • the lens corresponding to the first abutting surface is provided with a pair of mutually perpendicular third abutting surfaces
  • the lens corresponding to the second abutting surface is provided with a pair of mutually perpendicular fourth abutting surfaces
  • the first abutting surface is opposite to Each third abutting surface is inclinedly arranged
  • the second abutting surface is inclinedly arranged with respect to each fourth abutting surface.
  • the lens assembly further includes a housing and a circuit board, the housing and the circuit board are respectively connected to the base, the lens is located between the housing and the base, and the circuit board Located between the lens and the housing, the circuit board includes a pad, and the housing is provided with a recessed hole for exposing the pad on the circuit board.
  • the driving device includes a shape memory alloy wire.
  • the shape memory alloy wire When the shape memory alloy wire is energized, the shape memory alloy wire deforms to drive the lens to move along the optical axis of the lens.
  • the shape memory alloy wire has a "V" shape, and the shape memory alloy wire includes two ends connected to the base and a V-shaped drive end located between the two ends.
  • a driving protrusion is provided, the driving protrusion includes a V-shaped end, and the V-shaped driving end of the shape memory alloy wire is in mating contact with the V-shaped end of the lens.
  • the lens assembly further includes a first conductive member and a second conductive member, the first conductive member is fixed on the end surface of the first side plate away from the bottom plate, and the first conductive member One end of the shape memory alloy wire is fixedly connected and electrically connected, the second conductive member is fixed on the end surface of the second side plate away from the bottom plate, the second conductive member and the shape memory alloy wire The other end is fixedly connected and electrically connected.
  • the height direction of the first side plate, the second side plate and the lens is parallel to the optical axis direction of the lens, and the height of the connection between the first side plate and the first conductive member is greater than Or equal to one third of the height of the lens, and the height of the connection between the second side plate and the second conductive member is greater than or equal to one third of the height of the lens.
  • the lens assembly further includes a pair of elastic members, the elastic members are located between the lens and the bottom plate, and one end of each elastic member is connected to the bottom plate. The other end of the lens assembly is connected to one end of the lens assembly facing the bottom plate.
  • the lens further includes a plurality of blocking members respectively located at one end of the first guide groove and the second guide groove away from the bottom plate;
  • the lens assembly further includes a plurality of resilient members and a plurality of blocking members respectively located at one end of the first guide groove and the second guide groove away from the bottom plate, and the end of the lens away from the bottom plate is located along the lens
  • a number of accommodating holes are opened in the direction of the optical axis, the resilient member is arranged in the corresponding accommodating hole, one end of the blocking member is connected to the first side plate or the second side plate, and the other end of the blocking member Located at an end of the accommodating hole away from the bottom plate, and an end of the resilient member away from the lens is fixed to the blocking member.
  • the lens assembly drives the lens to move along the optical axis of the lens through the drive assembly to achieve autofocus.
  • the structure of the lens assembly is simple, and the first ball assembly adopted includes the first ball components that contact each other. The ball and the second ball.
  • the diameter of the first ball is greater than the diameter of the second ball, which can prevent the first ball from being unable to reach the proper length of the ball assembly.
  • the second ball can adjust the length of the first ball assembly, and the first ball can be adjusted.
  • the horizontal width of the ball assembly enables the lens to be close to the ball, and the lens is not prone to shaking during auto focus, which increases the stability of the lens assembly during auto focus.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a lens assembly provided by an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an exploded structure of a lens assembly provided by an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a three-dimensional structure of a base provided by an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a three-dimensional structure of a housing provided by an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a three-dimensional structure of a lens provided by an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a three-dimensional structure of the base and the lens provided by an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of an enlarged structure at A in FIG. 6;
  • FIG. 8 is a schematic diagram of a three-dimensional structure of a lens provided by an embodiment of the present invention from another perspective;
  • FIG. 9 is a schematic diagram of a three-dimensional structure of a ball assembly provided by an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a three-dimensional structure of a shape memory alloy wire provided by an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a three-dimensional structure of a shape memory alloy wire, a base, a lens, a first conductive member, and a second conductive member provided by an embodiment of the present invention
  • FIG. 12 is a schematic diagram of the three-dimensional structure of the base and the elastic member provided by an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of an exploded structure of a base, a lens, and an elastic member according to an embodiment of the present invention
  • Figure 14 is a schematic sectional view of the structure along B-B in Figure 6;
  • 15 is a schematic diagram of a three-dimensional structure of an elastic member provided by an embodiment of the present invention.
  • 16 is a schematic diagram of the three-dimensional structure of the base, the lens, and the blocking member in cooperation according to an embodiment of the present invention
  • FIG. 17 is a schematic diagram of a three-dimensional structure of a barrier provided by an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of another exploded structure of a lens assembly provided by an embodiment of the present invention.
  • an embodiment of the present invention provides a lens assembly 10, the lens assembly 10 includes a housing 11, a base 12, a lens 13 mounted to the base 12, a shape memory alloy wire 14 , Ball assembly 15 and two elastic members 16.
  • the housing 11 is sleeved on the base 12 and connected to the base 12, the shape memory alloy wire 14 is connected between the base 12 and the lens 13, and the two elastic members 16 are connected to the lens 13
  • the ball assembly 15 is arranged between the lens 13 and the base 12
  • the two elastic members 16 are used to prevent the lens 13 from deflection relative to the optical axis direction of the lens 13 when the lens 13 moves along the optical axis direction of the lens 13.
  • the shape memory alloy wire 14 may also adopt other driving devices, such as an electromagnetic driving structure, so that the driving device can drive the lens to move along the optical axis of the lens.
  • the base 12 includes a bottom plate 121 and a plurality of side plates extending from the bottom plate 121.
  • the bottom plate 121 and the side plates together form a receiving space for accommodating the lens.
  • the side plates include a first side plate 122 and a second side plate.
  • the side plate 123 and the third side plate 124, the first side plate 122 and the second side plate 123 respectively extend from the opposite sides of the bottom plate 121 toward the housing 11, and the third side plate 124 faces from the other side of the bottom plate 121
  • the housing 11 extends in the direction and is connected to the first side plate 122 and the second side plate 123 respectively.
  • the bottom plate 121, the first side plate 122, the second side plate 123 and the third side plate 124 enclose the accommodation space to accommodate the lens 13.
  • the bottom plate 121, the first side plate 122, the second side plate 123 and the third side plate 124 are integrally formed.
  • the material of the base 12 may be plastic.
  • the height direction of the first side plate 122 is parallel to the optical axis direction of the lens 13.
  • a first convex portion 1221 is convexly provided on the side of the first side plate 122 facing the lens 13.
  • the side of the first side plate 122 facing the lens 13 further defines a first clamping hole 1222.
  • the first convex portion 1221 is used to enclose the outer peripheral surface of the lens 13 to form a guide groove to accommodate the ball assembly 15.
  • the shape of the first convex portion 1221 is not limited.
  • the at least one first protrusion 1221 includes a first abutting surface 1223 enclosing and forming a guide groove.
  • the first abutting surface 1223 is used to abut the ball assembly 15, and the first abutting surface 1223 is opposite to the first abutting surface 1223.
  • the side plate 122 is inclined.
  • the first protrusion 1221 includes at least one.
  • first protrusions 1221 there are two first protrusions 1221, one first protrusion 1221 is located at the end of the first side plate 122 away from the third side plate 124, and the other first protrusion 1221 is located near the first side plate 122.
  • One end of the third side plate 124 One end of the third side plate 124.
  • the first locking hole 1222 is used to cooperate with the positioning structure of the lens 13 to prevent the lens 13 from rotating with the optical axis of the lens 13 as the center of the circle.
  • the first locking hole 1222 penetrates the first side plate 122, and the first locking hole 1222 divides the first side plate 122 into two sections. It can be understood that the first side plate 122 can be divided into multiple sections as required.
  • the height direction of the second side plate 123 is parallel to the optical axis direction of the lens 13.
  • a second convex portion 1231 protrudes from the side of the second side plate 123 facing the lens 13.
  • the side of the second side plate 123 facing the lens 13 also defines a second locking hole 1232.
  • the second convex portion 1231 is used for enclosing the outer peripheral surface of the lens 13 to form a guide groove for accommodating the ball assembly 15.
  • the shape of the second convex portion 1231 is not limited.
  • the at least one second protrusion 1231 includes a second abutting surface 1233 enclosing and forming a guide groove.
  • the second abutting surface 1233 is used for abutting the ball assembly 15, and the second abutting surface 1233 is opposite to the second abutting surface 1233.
  • the side plate 123 is inclined.
  • the second protrusion 1231 includes at least one.
  • the second convex portion 1231 includes two, one second convex portion 1231 is located at the end of the second side plate 123 away from the third side plate 124, and the other second convex portion 1231 is located near the second side plate 123 One end of the third side plate 124.
  • the second locking hole 1232 is used to cooperate with the positioning structure of the lens 13 to prevent the lens 13 from rotating with the optical axis of the lens 13 as the center of the circle.
  • the second locking hole 1232 penetrates the second side plate 123, and the second locking hole 1232 divides the second side plate 123 into two sections. It can be understood that the second side plate 123 can be divided into multiple sections as required.
  • the third side plate 124 makes the structure of the base 12 more stable.
  • the third side plate 124 can also be equipped with other components. It can be understood that when other components are not installed on the third side plate 124, the third side plate 124 may be omitted.
  • the bottom plate 121 is used to connect the first side plate 122, the second side plate 123 and the third side plate 124, the bottom plate 121 is also used to carry the lens 13, and a through hole is provided in the center of the bottom plate 121 for light to pass through.
  • a protrusion 1211 may be provided on the bottom plate 121 to pass through and fix the elastic member 16. It can be understood that the structure of the bottom plate 121 to fix the elastic member 16 is not limited, for example, the elastic member 16 can be fixed by screw connection.
  • the shape of the housing 11 is not limited.
  • the housing 11 is used to provide protection and dustproof for the entire lens assembly 10, prevent dust from entering the lens assembly 10, and avoid damaging the internal parts of the housing 11.
  • the material of the housing 11 is not limited. For example, it can be plastic or metal. When the material of the housing 11 is metal, the material of the housing 11 can be metal such as stainless steel or copper.
  • the housing 11 is provided with a recessed hole 111, and the recessed hole 111 is used to expose the components in the housing 11 that need to be connected to the outside.
  • the shape and position of the recessed hole 111 are not limited.
  • the lens 13 is located between the housing 11 and the base 12.
  • the optical axis direction of the lens 13 is perpendicular to the bottom plate 121, and the optical axis direction of the lens 13 is parallel to the first side plate 122 and the second side plate 123, respectively.
  • the height direction of the lens 13 is parallel to the optical axis direction of the lens 13.
  • the opposite sides of the lens 13 are provided with a third convex portion 131 opposite to the first convex portion 1221 and a fourth convex portion 132 opposite to the second convex portion 1231.
  • the opposite sides of the lens 13 are also convex oppositely.
  • first positioning portion 133 opposite to the first locking hole 1222 and a second positioning portion 134 opposite to the second locking hole 1232.
  • the first abutting surface 1223 of the first convex portion 1221, the third convex portion 131, the first side plate 122 and the lens 13 enclose a first guide groove 135, and the second abutting surface 1233 of the second convex portion 1231 ,
  • the fourth protrusion 132, the second side plate 123 and the lens 13 are enclosed to form a second guide groove 136, and a ball assembly 15 is respectively provided in the first guide groove 135 and the second guide groove 136.
  • the first abutting surface 1223 is inclined to the first side plate 122.
  • the first abutting surface 1223 gives the ball assembly 15 a force perpendicular to the first abutting surface 1223.
  • the second abutting surface 1233 is inclined to the second side plate 123.
  • the second abutting surface 1233 gives the ball assembly 15 a force perpendicular to the second abutting surface 1233.
  • the first positioning portion 133 is disposed in the first clamping hole 1222, and the second positioning portion 134 is disposed in the second clamping hole 1232.
  • the lens 13 is also provided with a driving protrusion 137, and the driving protrusion 137 is used to contact and connect with the shape memory alloy wire 14.
  • the shape of the third protrusion 131 is not limited.
  • the lens 13 forms a pair of third abutting surfaces 1311 perpendicular to each other on the third convex portion 131 corresponding to the first abutting surface 1223.
  • the first abutting surface 1223 is inclined with respect to each third abutting surface 1311.
  • the number of the third protrusions 131 is equal to the number of the first protrusions 1221, so at least one first guide groove 135 is included.
  • the number of third convex portions 131 includes two.
  • the position of each third convex portion 131 corresponds to the position of one first convex portion 1221 respectively.
  • Each third convex portion 131 and the corresponding first convex portion 1221 jointly form a first guiding groove 135, thereby forming a total of two first guiding grooves 135.
  • a first guide groove 135 is located at an end of the first side plate 122 close to the third side plate 124, and another first guide groove 135 is located at an end of the first side plate 122 away from the third side plate 124.
  • the shape of the fourth protrusion 132 is not limited.
  • the lens 13 and the fourth protrusion 132 form a pair of fourth abutting surfaces 1321 that are perpendicular to each other and corresponding to the fourth abutting surface 1321.
  • the second abutting surface 1333 is inclinedly arranged with respect to each fourth abutting surface 1321.
  • the number of the fourth protrusions 132 is equal to the number of the second protrusions 1231, so at least one second guide groove 136 is included.
  • the number of the fourth convex portion 132 includes two.
  • the position of each fourth protrusion 132 corresponds to the position of a second protrusion 1231 respectively.
  • Each fourth protrusion 132 and the corresponding second protrusion 1231 jointly form a second guide groove 136, and a total of two second guide grooves 136 are formed.
  • a second guide groove 136 is located at an end of the second side plate 123 close to the third side plate 124, and another second guide groove 136 is located at an end of the second side plate 123 away from the third side plate 124.
  • the first positioning portion 133 and the third convex portion 131 are located on the same side of the lens 13.
  • the first positioning portion 133 is offset from the center of the lens 13.
  • the shape of the first positioning portion 133 is not limited.
  • the shape of the side wall of the first positioning portion 133 may be consistent with the shape of the side wall of the first locking hole 1222, so that the first positioning portion 133 and the side wall of the first locking hole 1222 fit together.
  • the side wall of the first positioning portion 133 away from the third side plate 124 is attached to the side wall of the first locking hole 1222. Since the first positioning portion 133 deviates from the center of the lens 13, when the lens 13 is installed, it can play a role in preventing fools.
  • the first positioning portion 133 is close to the side wall of the third side plate 124 and the side wall of the first locking hole 1222 fits, or the first The two side walls of the positioning portion 133 are respectively attached to the side walls of the first locking hole 1222, and the first positioning portion 133 is offset from the center of the lens 13, which can also play a role in preventing fools.
  • the second positioning portion 134 and the fourth convex portion 132 are located on the same side of the lens 13.
  • the second positioning portion 134 is offset from the center of the lens 13.
  • the shape of the second positioning portion 134 is not limited.
  • the shape of the side wall of the second positioning portion 134 may be the same as the shape of the side wall of the second locking hole 1232 so that the second positioning portion 134 and the side wall of the second locking hole 1232 fit together.
  • the side wall of the second positioning portion 134 away from the third side plate 124 is attached to the side wall of the first locking hole 1222. Since the second positioning portion 134 deviates from the center of the lens 13, when the lens 13 is installed, it can play a role in preventing fools.
  • the second positioning portion 134 is close to the side wall of the third side plate 124 and the side wall of the first locking hole 1222 fits, or the second The two side walls of the positioning portion 134 are respectively attached to the side walls of the second locking hole 1232, and the second positioning portion 134 is offset from the center of the lens 13, which can also play a role in preventing fools.
  • the driving protrusion 137 is located on the side of the lens 13 away from the third side plate 124.
  • the driving protrusion 137 includes a V-shaped end 1371, and the shape memory alloy wire 14 is in mating contact with the V-shaped end 1371 of the lens 13.
  • the ball assembly 15 includes a first ball assembly 151 and a second ball assembly 152.
  • the sum of the number of the first ball assembly 151 and the number of the second ball assembly 152 is equal to the number of the first guide groove 135 and the second guide The sum of the number of slots 136.
  • the first ball assembly 151 includes at least one ball assembly, and the number of the second ball assembly 152 may be zero, that is, no second ball assembly 152 is provided.
  • the first ball assembly 151 is located in the first guide groove 135 and/or the second guide groove 136, and the second ball assembly 152 is located in the first guide groove 135 and/or the second guide groove 136.
  • the first ball assembly 151 includes two
  • the second ball assembly 152 includes two.
  • first guide grooves 135 and one of the second guide grooves 136 are respectively provided with a first ball assembly 151
  • the other first guide groove 135 and the other of the second guide grooves 136 are respectively provided with a second ball assembly 152.
  • a first ball assembly 151 is provided in the first guide groove 135 at the end of the first side plate 122 that is far away from the third side plate 124, and is located at the first ball assembly 151 of the end of the second side plate 123 away from the third side plate 124.
  • Another first ball assembly 151 is arranged in the second guide groove 136; a second ball assembly 152 is arranged in the first guide groove 135 at one end of the first side plate 122 close to the third side plate 124, which is located close to the second side plate 123
  • Another second ball assembly 152 is provided in the second guide groove 136 at one end of the third side plate 124.
  • the first ball assembly 151 includes a first ball 1511 and a second ball 1512 in contact with each other.
  • the first ball 1511 includes at least two
  • the second ball 1512 includes at least one.
  • Each second ball 1512 is arranged between two adjacent first balls 1511, and the diameter of the first ball 1511 is larger than The diameter of the second ball 1512.
  • the diameter ratio of the second ball 1512 and the first ball 1511 is not limited. In one embodiment, the diameter of the second ball 1512 may be 0.05-0.8 times the diameter of the first ball 1511.
  • the first ball assembly 151 includes two first balls 1511 and a second ball 1512, a second ball 1512 is sandwiched between the two first balls 1511, the second ball 1512 and the two second balls 1511 A ball 1511 touches. Since the diameter of the second ball 1512 is smaller than the diameter of the first ball 1511, the mixed arrangement of large and small balls can prevent the use of only the first ball 1511 from being unable to reach the proper length of the ball assembly 15. If two first balls 1511 are used, the two balls will occupy The total length of the first ball assembly 151 cannot meet the requirements, but the length of the first guide groove 135 is not enough to accommodate three first balls 1511 at the same time.
  • the use of the second ball 1512 can adjust the total length of the first ball assembly 151, and can also adjust the first ball The horizontal width of the component 151. Understandably, according to needs, a plurality of second rolling balls 1512 may also be arranged between the two first rolling balls 1511.
  • the second ball assembly 152 includes at least one third ball 1521, and the diameter of the third ball 1521 is not limited.
  • the second ball assembly 152 includes a third ball 1521, and the diameter of the third ball 1521 may be equal to the diameter of the first ball 1511. If necessary, the second ball assembly 152 can be omitted. Only two first ball assemblies 151 are provided, which does not affect the first ball assembly 151 to guide the lens 13 to slide relative to the base 12 along the optical axis direction of the lens 13.
  • the shape memory alloy wire 14 preferably has a "V" shape.
  • the shape memory alloy wire 14 includes two ends 141 connected to the base 12 and a V-shaped drive end 142 located between the two ends 141.
  • the shape memory alloy wire The V-shaped drive end 142 of 14 is in mating contact with the V-shaped end 1371 of the lens 13.
  • the plane of the shape memory alloy wire 14 is parallel to the optical axis direction of the lens 13.
  • the shape memory alloy wire 14 Since the two ends 141 of the shape memory alloy wire 14 are fixedly connected to the base 12, the shape memory alloy wire 14 generates The deforming force is applied to the driving protrusion 137 of the lens 13 through the V-shaped driving end 142, and the lens 13 is guided along the optical axis of the lens 13 under the guidance of the first ball assembly 151 (or the first ball assembly 151 and the second ball assembly 152). The direction moves relative to the base 12 to adjust the focal length of the lens 13. By adjusting the magnitude of the current passing through the shape memory alloy wire 14, the amount of deformation of the shape memory alloy wire 14 can be adjusted, thereby adjusting the moving distance of the lens 13.
  • the material of the shape memory alloy wire 14 is not limited.
  • the material of the shape memory alloy wire 14 may include Nitinol, and the diameter of the shape memory alloy wire 14 is preferably 10 ⁇ m-50 ⁇ m. It can be understood that the two ends 141 of the shape memory alloy wire 14 can also be fixed on the lens, and the V-shaped drive end 142 of the shape memory alloy wire 14 and the base 12 are in contact with each other to drive the lens to move along the optical axis of the lens.
  • the lens assembly 10 further includes a first conductive member 17 and a second conductive member 18.
  • the first conductive member 17 is fixed on the end surface of the first side plate 122 away from the bottom plate 121, and the first conductive member 17 and One end 141 of the shape memory alloy wire 14 is fixedly connected and electrically connected, the second conductive member 18 is fixed on the end surface of the second side plate 123 away from the bottom plate 121, the second conductive member 18 and the shape memory alloy wire
  • the other end 141 of the 14 is fixedly connected and electrically connected, the height h1 of the connection between the first side plate 122 and the first conductive member 17 is greater than or equal to one third of the height of the lens 13, and the second side plate 123 is connected to the second conductive member 17
  • the height h2 of the joint of the piece 18 is greater than or equal to one third of the height of the lens 13.
  • the height of the connection between the first conductive member 17 and the second conductive member 18 and the shape memory alloy wire 14 is substantially equal to the height of the first side plate 122, and the height of the connection between the first side plate 122 and the first conductive member 17 is increased.
  • the height of the connection between the two side plates 123 and the second conductive member 18 can reduce the height of the first conductive member 17 and the second conductive member 18, thereby increasing the strength of the first conductive member 17 and the second conductive member 18, so that the first The conductive member 17 and the second conductive member 18 are not easily deformed after being stressed.
  • the first conductive member 17 and the second conductive member 18 may be conductive terminals or wire binding clips.
  • the materials of the first conductive member 17 and the second conductive member 18 are both conductive metal.
  • each elastic member 16 includes opposite ends, one end of each elastic member 16 is connected to the bottom plate 121 of the base 12, and the other end is connected to the end of the lens 13 close to the bottom plate 121 .
  • the two elastic members 16 are symmetrically arranged about the geometric center of the lens 13.
  • One end of the elastic member 16 connected to the bottom plate 121 of the base 12 is farther away from the shape memory alloy wire 14 than the other end.
  • the seat 12 is pressed tightly to generate pre-pressure on the three surfaces of the ball assembly 15 so that the ball assembly will not shake. Since the shape memory alloy wire 14 is located on the side of the lens 13, when the shape memory alloy wire 14 is deformed and the lens 13 moves along the optical axis direction of the lens 13, an upward force F1 is given to the lens 13 and a counterclockwise direction is generated.
  • the two elastic members 16 are driven by the lens 13 to deform.
  • the two elastic members 16 will give the bottom of the lens 13 a force F3 toward the bottom plate 121 and a force F4 toward the center of the lens 13.
  • the two elastic members 16 give the lens 13 The force and the counterclockwise torque balance F2.
  • the two elastic members 16 will drive the bottom of the lens 13, the first ball assembly 151, and the side plate of the base 12 in close contact, thereby preventing the lens 13 from deflection during movement and ensuring The stability of the lens 13 is improved.
  • the structures of the two elastic members 16 are the same, and this embodiment only describes the structure of one elastic member 16.
  • the elastic member 16 includes an arc-shaped body 161 and a first fixed end 162 and a second fixed end 163 respectively connected to both ends of the arc-shaped body 161.
  • the first fixed end 161 is connected to the bottom plate 121, and the second fixed end 162 Connected to the end of the lens 13 close to the bottom plate 121, the second fixed end 163 is close to the edge of the lens, and the distance from the second fixed end 163 to the edge of the lens 13 is less than a quarter of the length of the lens 13 perpendicular to the length direction.
  • each elastic member 16 and the arc-shaped body 161 further include a bending portion 164 extending from the arc-shaped body 161 in a direction away from the other elastic member 16.
  • the bent portion 164 has a "U" shape.
  • the arc-shaped body 161 is curved toward the lens 13.
  • the width and thickness of the arc-shaped body are not limited, and the width and thickness of the arc-shaped body can be set reasonably according to the force required to provide when the elastic member 16 is deformed.
  • the arc-shaped body 161 has an arc shape, so that the arc-shaped body 161 can balance the counterclockwise torque of the shape memory alloy wire 14 to the lens 13 with a small force.
  • a first mounting hole 1621 is defined on the first fixing end 162, and the first mounting hole 1621 is used to fix the first fixing end 162 on the bottom plate 121.
  • the first mounting hole 1621 may be a through hole.
  • the first mounting hole 1621 cooperates with the protrusion 1211 on the bottom plate 121 to fix the first fixing end 162.
  • a second mounting hole 1631 is defined on the second fixing end 163, and the second mounting hole 1631 is used to fix the second fixing end 163 on the lens 13.
  • the second mounting hole 1631 may be a through hole.
  • the lens assembly 10 further includes a plurality of blocking members 19 respectively located at one end of the first guide groove 135 and the second guide groove 136 away from the bottom plate 121.
  • one end of the blocking member 19 is connected to the first side plate 122 or the second side plate 123, and the other end of the blocking member 19 is located at an end of the first guide groove 135 or the second guide groove 136 away from the bottom plate 121.
  • the blocking member 19 can prevent the ball assembly 15 in the first guide groove 135 or the second guide groove 136 from rolling out.
  • the position where the blocking member 19 is fixed on the first side plate 122 or the second side plate 123 is not limited, as long as it can block the ball assembly 15.
  • the lens assembly 10 further includes a plurality of resilient members (not shown).
  • a plurality of accommodating holes 20 are defined on the end of the lens 13 away from the bottom plate 121 along the optical axis direction of the lens 13, and the accommodating holes 20 are blind holes.
  • the resilient member is arranged in the corresponding accommodating hole 20.
  • Each accommodating hole 20 is provided with a resilient member.
  • one end of the stopper 19 when one end of the stopper 19 is located at the end of the first guide groove 135 or the second guide groove 136 away from the bottom plate 121, one end of the stopper 19 is also located at an accommodating hole 20 away from the bottom plate 121.
  • One end of the resilient member is fixed to the blocking member 19 at one end away from the lens 13. The blocking member 19 can simultaneously prevent the resilient member from falling out of the receiving hole 20 and prevent the ball assembly 15 from rolling out of the ball assembly 15 in the first guide groove 135 or the second guide groove 136.
  • the accommodating hole 20 includes two, the resilient member includes two, and an accommodating hole 20 is provided under the blocking member 19 provided at one end of the first guide groove 135 away from the third side plate 124, Another accommodating hole 20 is provided under the blocking member 19 provided at one end of the second guide groove 136 of the third side plate 124.
  • the two resilient members are preferably coil springs and are respectively located in one accommodating hole 20.
  • the resilient member is pre-compressed when installed in the receiving hole 20.
  • the resilient member can also restore force to the lens 13 and press the lens 13 on the bottom plate 121 of the base 12.
  • the resilient member also provides a restoring force to the lens when the lens 13 moves.
  • a convex hull is provided on one side of the blocking member 19 close to the accommodating hole 20, and the convex hull is used to provide the resilient member for contact connection.
  • the resilient member includes a spring, and one end of the spring close to the convex hull is clamped on the convex hull.
  • the lens assembly 10 further includes a magnet 21 and a sensor (not shown).
  • the magnet is arranged on the side of the lens 13 near the third side plate 124, the sensor is arranged on the base 12, and the sensor is used for The position of the magnet is sensed to sense the position of the lens 13.
  • a slot can be formed on the lens 13 to accommodate the magnet.
  • the sensor is preferably a Hall sensor.
  • the lens assembly 10 also includes a circuit board 22, which is connected to the third side plate 124 of the base 12.
  • the circuit board 22 is located on the side of the third side plate 124 away from the lens 13, and the circuit board 22 is also located between the lens 13 and the housing 11. between.
  • the circuit board 22 is electrically connected to the sensor.
  • the circuit board 22 includes a pad 221.
  • the recessed hole 111 provided on the housing 11 is used to expose the pad 221 on the circuit board, which can prevent the circuit board from being short-circuited.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Studio Devices (AREA)
  • Lens Barrels (AREA)
  • Adjustment Of Camera Lenses (AREA)

Abstract

一种镜头组件（10），包括基座（12）、安装至基座（12）的镜头（13）、驱动装置和第一滚珠组件（151），驱动装置连接于基座（12）和镜头（13）之间，第一滚珠组件（151）设置在镜头（13）和基座（12）之间用于引导镜头（13）沿镜头（13）的光轴方向相对基座（12）滑动，第一滚珠组件（151）包括相互接触的第一滚珠（1511）和第二滚珠（1512），第一滚珠（1511）的直径大于第二滚珠（1512）的直径，驱动装置能带动镜头（13）沿镜头（13）的光轴方向移动，大小滚珠的使用能防止仅使用第一滚珠（1511）不能达到适合的滚珠组件长度，第二滚珠（1512）能调节第一滚珠组件（151）的长度，且能调整第一滚珠组件（151）的横向宽度，使镜头（13）能够和滚珠贴紧，镜头（13）在自动对焦时不易发生晃动，增加了镜头组件（10）的稳定性。

Description

镜头组件 技术领域
本发明涉及镜头光学成像技术领域，尤其涉及一种镜头组件。
 背景技术
近年来，在如智能手机、平板电脑一样的便携式终端机上都装载有高性能镜头模组。该高性能镜头模组一般具有自动对焦功能(auto focusing)。高性能镜头模组在自动对焦时，需要使镜头沿镜头的光轴方向移动。现有技术中，在镜头移动时，把滚珠放置在高性能镜头模组的滚道中，利用滚珠实现镜头的滚动摩擦。而利用滚珠实现滚动摩擦时，滚珠在实现相应的长度时，滚珠的直径难以满足滚道的宽度，镜头难以和滚珠贴紧，镜头在自动对焦时易发生晃动。
因此，有必要提供一种新的照相机镜头模组以解决上述问题。
 技术问题
本发明的目的提供一种结构简单、稳定性高、镜头在自动对焦功能时不易发生晃动的镜头组件。
 技术解决方案
本发明的目的采用如下技术方案实现：
一种镜头组件，所述镜头组件包括基座、安装至所述基座的镜头、驱动装置和第一滚珠组件，所述驱动装置连接于所述基座和所述镜头之间，所述第一滚珠组件设置在所述镜头和所述基座之间用于引导所述镜头沿镜头的光轴方向相对所述基座滑动，所述第一滚珠组件包括相互接触的第一滚珠和第二滚珠，所述第一滚珠的直径大于所述第二滚珠的直径，所述驱动装置能带动所述镜头沿镜头的光轴方向移动。
作为一种改进方式，所述第一滚珠组件包括两个第一滚珠和一个第二滚珠，所述第二滚珠位于两个第一滚珠之间，所述第二滚珠和两个第一滚珠接触。
作为一种改进方式，所述基座包括底板、和从底板相对的两侧分别延伸的第一侧板、第二侧板，所述底板、所述第一侧板以及所述第二侧板围合形成收容空间；所述镜头安装在所述收容空间内，所述镜头的光轴方向与所述底板垂直，所述镜头的光轴方向分别和所述第一侧板、第二侧板平行。
作为一种改进方式，所述第一侧板朝向所述镜头的一侧上凸设有第一凸部，所述第二侧板朝向所述镜头的一侧凸设有第二凸部，所述镜头相对的两侧反向凸设有与第一凸部相对的第三凸部和与第二凸部相对的第四凸部，所述第一凸部、第三凸部、第一侧板和镜头之间围合形成第一导槽，所述第二凸部、第四凸部、第二侧板和镜头之间围合形成第二导槽，所述第一导槽和所述第二导槽中分别设置第一滚珠组件。
作为一种改进方式，所述第一凸部、第二凸部、第三凸部、第四凸部、第一导槽和第二导槽分别包括两个，所述镜头组件还包括第二滚珠组件，所述第二滚珠组件包括至少一个第三滚珠，其中一个所述第一导槽和其中一个所述第二导槽中分别设置第一滚珠组件，其中另一个所述第一导槽和其中另一个所述第二导槽中分别设置第二滚珠组件。
作为一种改进方式，所述第一凸部设有用于抵顶第一滚珠组件的第一抵顶面，所述第二凸部设有用于抵顶第二滚珠组件的第二抵顶面，所述镜头对应第一抵顶面设置一对相互垂直的第三抵顶面，所述镜头对应第二抵顶面设置一对相互垂直的第四抵顶面，所述第一抵顶面相对于每一个第三抵顶面倾斜设置，所述第二抵顶面相对于每一个第四抵顶面倾斜设置。
作为一种改进方式，所述镜头组件还包括外壳和电路板，所述外壳、电路板分别和所述基座连接，所述镜头位于所述外壳和所述基座之间，所述电路板位于所述镜头和所述外壳之间，所述电路板包括焊盘，所述外壳上开设凹孔，所述凹孔用于露出所述电路板上的焊盘。
作为一种改进方式，所述驱动装置包括形状记忆合金线，当所述记忆合金线通电时，所述记忆合金线发生变形以带动所述镜头沿镜头的光轴方向移动。
作为一种改进方式，所述形状记忆合金线呈“V”字形，所述形状记忆合金线包括连接至所述基座的两末端和位于两末端之间的V型驱动端，所述镜头上设置有驱动凸部，所述驱动凸部包括V型端部，所述形状记忆合金线的V型驱动端与所述镜头的V型端部配合接触。
作为一种改进方式，所述镜头组件还包括第一导电件和第二导电件，所述第一导电件固定在所述第一侧板的远离所述底板的端面上，所述第一导电件和形状记忆合金线的一末端固定连接且电性连接，所述第二导电件固定在所述第二侧板的远离所述底板的端面上，所述第二导电件和形状记忆合金线的另一末端固定连接且电性连接。
作为一种改进方式，所述第一侧板、第二侧板和镜头的高度方向平行于所述镜头的光轴方向，所述第一侧板与所述第一导电件连接处的高度大于或等于所述镜头高度的三分之一，所述第二侧板与所述第二导电件连接处的高度大于或等于所述镜头高度的三分之一。
作为一种改进方式，所述镜头组件还包括一对弹性件，所述弹性件位于所述镜头和所述底板之间，每一个所述弹性件的一端和所述底板连接，所述弹性件的另一端和所述镜头组件朝向所述底板的一端连接。
作为一种改进方式，所述镜头还包括多个分别位于所述第一导槽和第二导槽的远离所述底板的一端的阻挡件；
或所述镜头组件还包括若干个回弹件和多个分别位于所述第一导槽和第二导槽的远离所述底板的一端的阻挡件，所述镜头远离底板的一端上沿镜头的光轴方向开设若干容置孔，所述回弹件设置在相应的容置孔内，所述阻挡件的一端和所述第一侧板或第二侧板连接，所述阻挡件的另一端位于所述容置孔远离底板的一端，所述回弹件远离镜头的一端固定至所述阻挡件。
 有益效果
本发明实施方式相对于现有技术而言，镜头组件通过驱动组件带动所述镜头沿镜头的光轴方向移动以实现自动对焦，镜头组件结构简单，采用的第一滚珠组件包括相互接触的第一滚珠和第二滚珠，第一滚珠的直径大于第二滚珠的直径，能防止仅适用第一滚珠不能达到适合的滚珠组件长度，第二滚珠能调节第一滚珠组件的长度，且能调整第一滚珠组件的横向宽度，使镜头能够和滚珠贴紧，镜头在自动对焦时不易发生晃动，增加了镜头组件在自动对焦时的稳定性。
 附图说明
图1为本发明实施例提供的镜头组件的立体结构示意图；
图2为本发明实施例提供的镜头组件的爆炸结构示意图；
图3为本发明实施例提供的基座的立体结构示意图；
图4为本发明实施例提供的外壳的立体结构示意图；
图5为本发明实施例提供的镜头的立体结构示意图；
图6为本发明实施例提供的基座与镜头配合的立体结构示意图；
图7为图6中A处的放大结构示意图；
图8为本发明实施例提供的镜头的另一视角的立体结构示意图；
图9为本发明实施例提供的滚珠组件的立体结构示意图；
图10为本发明实施例提供的形状记忆合金线的立体结构示意图；
图11为本发明实施例提供的形状记忆合金线、基座、镜头、第一导电件和第二导电件配合的立体结构示意图；
图12为本发明实施例提供的基座与弹性件配合的立体结构示意图；
图13为本发明实施例提供的基座、镜头和弹性件的爆炸结构示意图；
图14为图6中沿B-B的剖视结构示意图；
图15为本发明实施例提供的弹性件的立体结构示意图；
图16为本发明实施例提供的基座、镜头和阻挡件配合的立体结构示意图；
图17为本发明实施例提供的阻挡件的立体结构示意图；
图18为本发明实施例提供的镜头组件的另一种爆炸结构示意图。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产 品或设备固有的其它步骤或单元。
需要说明的是，在本发明中涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
请一并参阅图1和图2，本发明的实施例提供一种镜头组件10，该镜头组件10包括外壳11、基座12、安装至所述基座12的镜头13、形状记忆合金线14、滚珠组件15和两个弹性件16。外壳11套设在基座12上并和基座12连接，所述形状记忆合金线14连接于所述基座12和所述镜头13之间，所述两弹性件16连接于所述镜头13和所述基座12之间，两弹性件16的一端分别和基座12连接，两弹性件16的另一端分别和镜头13连接，滚珠组件15设置在所述镜头13和基座12之间用于引导镜头13沿镜头13的光轴方向相对基座12滑动，弹性件16能使镜头13和基座12夹紧滚珠组件15，以使当形状记忆合金线14通电时，形状记忆合金线14发生变形带动所述镜头13沿镜头13的光轴方向移动，两弹性件16用于在镜头13沿镜头13的光轴方向移动时，防止镜头13相对镜头13的光轴方向发生偏转。可以理解，形状记忆合金线14也可以采用其他驱动装置，比如采用电磁驱动结构，使驱动装置能带动所述镜头沿镜头的光轴方向移动。
请参阅图3，基座12包括底板121和若干从底板121延伸的侧板，底板121和侧板共同形成用于收容镜头的收容空间，具体的，侧板包括第一侧板122、第二侧板123和第三侧板124，第一侧板122和第二侧板123分别从所述底板121相对的两侧朝外壳11方向延伸，第三侧板124从底板121的另一侧朝外壳11方向延伸并分别和第一侧板122与第二侧板123连接。底板121、第一侧板122、第二侧板123和第三侧板124围合形成所述收容空间，以容置镜头13。在本实施例中，底板121、第一侧板122、第二侧板123和第三侧板124一体成型。基座12的材质可以为塑料。
第一侧板122的高度方向平行于镜头13的光轴方向。第一侧板122朝向镜头13的一侧上凸设有第一凸部1221。第一侧板122上朝向镜头13的一侧还开设第一卡设孔1222。
第一凸部1221用于和镜头13的外周面围合形成导槽，以容置滚珠组件15。第一凸部1221的形状不做限定。在本实施例中，至少一个第一凸部1221包括围合形成导槽的第一抵顶面1223，第一抵顶面1223用于抵顶滚珠组件15，第一抵顶面1223相对第一侧板122倾斜。第一凸部1221至少包括一个。在本实施例中，第一凸部1221包括两个，一个第一凸部1221位于第一侧板122远离第三侧板124的一端，另一个第一凸部1221位于第一侧板122靠近第三侧板124的一端。
第一卡设孔1222用于与镜头13的定位结构配合，防止镜头13以镜头13的光轴为圆心转动。在本实施例中，第一卡设孔1222贯穿第一侧板122，第一卡设孔1222把第一侧板122分隔成两段。可以理解，可以根据需要，把第一侧板122分隔成多段。
第二侧板123的高度方向平行于镜头13的光轴方向。第二侧板123朝向镜头13的一侧上凸设有第二凸部1231。第二侧板123朝向镜头13的一侧还开设第二卡设孔1232。
第二凸部1231用于与镜头13的外周面围合形成导槽，以容置滚珠组件15。第二凸部1231的形状不做限定。在本实施例中，至少一个第二凸部1231包括围合形成导槽的第二抵顶面1233，第二抵顶面1233用于抵顶滚珠组件15，第二抵顶面1233相对第二侧板123倾斜。第二凸部1231至少包括一个。在本实施例中，第二凸部1231包括两个，一个第二凸部1231位于第二侧板123远离第三侧板124的一端，另一个第二凸部1231位于第二侧板123靠近第三侧板124的一端。
第二卡设孔1232用于与镜头13的定位结构配合，防止镜头13以镜头13的光轴为圆心转动。在本实施例中，第二卡设孔1232贯穿第二侧板123，第二卡设孔1232把第二侧板123分隔成两段。可以理解，可以根据需要，把第二侧板123分隔成多段。
第三侧板124使基座12的结构更加稳固，在有需要时，第三侧板124还可以安装其他元件。可以理解，在第三侧板124上不安装其他元件时，第三侧板124可以省略设置。
底板121用于连接第一侧板122、第二侧板123和第三侧板124，底板121还用于承载镜头13，底板121中央设通孔以供光线穿过。底板121上可以设置凸起1211，以穿过并固定弹性件16。可以理解，底板121固定弹性件16的结构不做限定，如可以通过螺纹连接以固定弹性件16。
请参阅图4，外壳11的形状不做限定，外壳11用于给整个镜头组件10提供保护和防尘，避免灰尘进入镜头组件10，和避免损伤外壳11内部的零部件。外壳11的材质不做限定，如可以为塑料或金属，在外壳11的材质为金属时，外壳11的材质可以为不锈钢、铜等金属。外壳11上开设有凹孔111，凹孔111用于露出外壳11内需要与外界连接的元件。凹孔111的形状和位置不做限定。
请一并参阅图5、图6和图7，镜头13位于外壳11和基座12之间。镜头13的光轴方向和底板121垂直，所述镜头13的光轴方向分别和所述第一侧板122、第二侧板123平行。镜头13的高度方向平行于镜头13的光轴方向。镜头13相对的两侧反向凸设有与第一凸部1221相对的第三凸部131和与第二凸部1231相对的第四凸部132，镜头13相对的两侧还反向凸设有与第一卡设孔1222相对的第一定位部133和与第二卡设孔1232相对的第二定位部134。第一凸部1221的第一抵顶面1223、第三凸部131、第一侧板122和镜头13之间围合形成第一导槽135，第二凸部1231的第二抵顶面1233、第四凸部132、第二侧板123和镜头13之间围合形成第二导槽136，第一导槽135和第二导槽136中分别设置一个滚珠组件15。第一抵顶面1223倾斜于第一侧板122，第一抵顶面1223给滚珠组件15一个垂直与第一抵顶面1223的力，在滚珠组件15被预压紧时，能使三个面给滚珠压力，滚珠组件15不会晃动，镜头13在沿镜头13的光轴方向移动时不易晃动。第二抵顶面1233倾斜于第二侧板123，第二抵顶面1233给滚珠组件15一个垂直与第二抵顶面1233的力，在滚珠组件15被预压紧时，能使三个面给滚珠压力，滚珠组件15不会晃动，镜头13在沿镜头13的光轴方向移动时不易晃动。第一定位部133设置在第一卡设孔1222内，第二定位部134设置在第二卡设孔1232内。镜头13上还设置有驱动凸部137，驱动凸部137用于和形状记忆合金线14接触连接。
第三凸部131的形状不做限定。在本实施例中，镜头13于第三凸部131形成对应第一抵顶面1223的设置一对相互垂直的第三抵顶面1311。第一抵顶面1223相对于每一个第三抵顶面1311倾斜设置。第三凸部131的数量和第一凸部1221的数量相等，故至少包括一个第一导槽135。在本实施例中，第三凸部131的数量包括两个。每个第三凸部131的位置分别和一个第一凸部1221的位置相对应。每个第三凸部131与对应的第一凸部1221共同形成一个第一导槽135，从而共形成两个第一导槽135。一个第一导槽135位于第一侧板122靠近第三侧板124的一端，另一个第一导槽135位于第一侧板122远离第三侧板124的一端。
第四凸部132的形状不做限定。在本实施例中，镜头13与第四凸部132形成对应第四抵顶面1321的设置一对相互垂直的第四抵顶面1321。第二抵顶面1333相对于每一个第四抵顶面1321倾斜设置。第四凸部132的数量和第二凸部1231的数量相等，故至少包括一个第二导槽136。在本实施例中，第四凸部132的数量包括两个。每个第四凸部132的位置分别和一个第二凸部1231的位置相对应。每个第四凸部132与对应的第二凸部1231共同形成一个第二导槽136，共形成两个第二导槽136。一个第二导槽136位于第二侧板123靠近第三侧板124的一端，另一个第二导槽136位于第二侧板123远离第三侧板124的一端。
第一定位部133和第三凸部131位于镜头13的同一侧。第一定位部133偏离镜头13的中心。第一定位部133的形状不做限定。第一定位部133的侧壁的形状可以和第一卡设孔1222的侧壁的形状一致，以使第一定位部133和第一卡设孔1222的侧壁贴合。在本实施例中，第一定位部133远离第三侧板124的侧壁和第一卡设孔1222的侧壁贴合。由于第一定位部133偏离镜头13的中心，在安装镜头13时，能起到防呆作用。可以理解，也可以通过调整第一卡设孔1222的形状或大小，使第一定位部133靠近第三侧板124的侧壁和第一卡设孔1222的侧壁贴合，或使第一定位部133的两个侧壁分别和第一卡设孔1222的侧壁贴合，第一定位部133偏离镜头13的中心，同样能起到防呆作用。
第二定位部134和第四凸部132位于镜头13的同一侧。第二定位部134偏离镜头13的中心。第二定位部134的形状不做限定。第二定位部134的侧壁的形状可以和第二卡设孔1232的侧壁的形状一致，以使第二定位部134和第二卡设孔1232的侧壁贴合。在本实施例中，第二定位部134远离第三侧板124的侧壁和第一卡设孔1222的侧壁贴合。由于第二定位部134偏离镜头13的中心，在安装镜头13时，能起到防呆作用。可以理解，也可以通过调整第二卡设孔1232的形状或大小，使第二定位部134靠近第三侧板124的侧壁和第一卡设孔1222的侧壁贴合，或使第二定位部134的两个侧壁分别和第二卡设孔1232的侧壁贴合，第二定位部134偏离镜头13的中心，同样能起到防呆作用。
请参阅图8，驱动凸部137位于镜头13远离第三侧板124的一侧。驱动凸部137包括V型端部1371，形状记忆合金线14与所述镜头13的V型端部1371配合接触。
请参阅图9，滚珠组件15包括第一滚珠组件151和第二滚珠组件152，第一滚珠组件151的数量和第二滚珠组件152的数量之和等于第一导槽135的数量和第二导槽136的数量之和。第一滚珠组件151至少包括一个，第二滚珠组件152可以为零个，即不设置第二滚珠组件152。第一滚珠组件151位于第一导槽135内和/或第二导槽136内，第二滚珠组件152位于第一导槽135内和/或第二导槽136内。在本实施例中，第一滚珠组件151包括两个，第二滚珠组件152包括两个。其中一个第一导槽135和其中一个第二导槽136中分别设置一个第一滚珠组件151，其中另一个第一导槽135和其中另一个第二导槽136中分别设置一个第二滚珠组件152。具体的，位于第一侧板122的远离第三侧板124的一端的第一导槽135内设置一个第一滚珠组件151，位于第二侧板123的远离第三侧板124的一端的第二导槽136内设置另一个第一滚珠组件151；位于第一侧板122靠近第三侧板124的一端的第一导槽135内设置一个第二滚珠组件152，位于第二侧板123靠近第三侧板124的一端的第二导槽136内设置另一个第二滚珠组件152。
第一滚珠组件151包括相互接触的第一滚珠1511和至第二滚珠1512。本实施例中，第一滚珠1511至少包括两个，第二滚珠1512至少包括一个，每一个第二滚珠1512设置在相邻两个第一滚珠1511之间，第一滚珠1511的直径大于所述第二滚珠1512的直径。第二滚珠1512和第一滚珠1511的直径比不做限定，在一个实施方式中，第二滚珠1512的直径可以为第一滚珠1511直径的0.05-0.8倍。在本实施例中，第一滚珠组件151包括两个第一滚珠1511和一个第二滚珠1512，一个第二滚珠1512夹设于两个第一滚珠1511之间，第二滚珠1512和两个第一滚珠1511接触。由于第二滚珠1512的直径小于第一滚珠1511的直径，大小滚珠混合设置能防止仅使用第一滚珠1511不能达到适合的滚珠组件15长度，如使用两个第一滚珠1511，两个滚珠所占的总长度尚不能达到要求，但第一导槽135的长度不够同时容纳三个第一滚珠1511，第二滚珠1512的使用能调节第一滚珠组件151的总长度，且也能调整第一滚珠组件151的横向宽度。可以理解地，根据需要，两个第一滚珠1511之间也可以设置多个第二滚珠1512。
第二滚珠组件152包括至少一个第三滚珠1521，第三滚珠1521的直径不做限定。在本实施例中，第二滚珠组件152包括一个第三滚珠1521，第三滚珠1521的直径可以等于第一滚珠1511的直径。根据需要，第二滚珠组件152可以省略。仅设置两个第一滚珠组件151，不影响第一滚珠组件151引导镜头13沿镜头13的光轴方向相对基座12滑动。
请参阅图10，形状记忆合金线14优选呈“V”字形，形状记忆合金线14包括连接至基座12的两末端141和位于两末端141之间的V型驱动端142，形状记忆合金线14的V型驱动端142与镜头13的V型端部1371配合接触。形状记忆合金线14所在的平面平行于镜头13的光轴方向。当形状记忆合金线14被通过的电流加热时，形状记忆合金线14发生收缩变形从而产生变形力，由于形状记忆合金线14的两末端141固定连接至基座12，形状记忆合金线14产生的变形力通过V型驱动端142施加到镜头13的驱动凸部137上，镜头13在第一滚珠组件151（或第一滚珠组件151和第二滚珠组件152）的引导下沿镜头13的光轴方向相对基座12移动，从而调节镜头13的焦距。通过调整形状记忆合金线14通过的电流大小，可调整形状记忆合金线14的变形量，从而调整镜头13的移动距离。形状记忆合金线14的材质不做限定。本实施例中，形状记忆合金线14的材质可以包括镍钛合金，形状记忆合金线14的直径优选为10μm~50μm。可以理解，形状记忆合金线14的两末端141也可以固定在镜头上，形状记忆合金线14的V型驱动端142和基座12配合接触，一样能驱动镜头沿镜头的光轴方向移动。
请参阅图11，镜头组件10还包括第一导电件17和第二导电件18，第一导电件17固定在第一侧板122的远离所述底板121的端面上，第一导电件17和形状记忆合金线14的一末端141固定连接且电性连接，第二导电件18固定在所述第二侧板123的远离所述底板121的端面上，第二导电件18和形状记忆合金线14的另一末端141固定连接且电性连接，第一侧板122与第一导电件17连接处的高度h1大于或等于镜头13高度的三分之一，第二侧板123与第二导电件18连接处的高度h2大于或等于镜头13高度的三分之一。第一导电件17和第二导电件18与形状记忆合金线14的连接处的高度基本等于第一侧板122的高度，增加第一侧板122与第一导电件17连接处的高度、第二侧板123与第二导电件18连接处的高度，可以降低第一导电件17和第二导电件18的高度，从而增加第一导电件17和第二导电件18的强度，使得第一导电件17和第二导电件18受力后不易变形。在本实施例中，第一导电件17和第二导电件18可以为导电端子或绑线夹子。第一导电件17和第二导电件18的材质都为导电金属。
请参阅图12、图13和图14，每一个弹性件16包括相对的两端，每一个弹性件16的一端和基座12的底板121连接，另一端和镜头13的靠近底板121的一端连接。在本实施例中，两个弹性件16关于镜头13的几何中心对称设置。弹性件16和基座12的底板121连接的一端比另一端更加远离形状记忆合金线14。安装好弹性件16时，弹性件16在和底板121、镜头13连接，形状记忆合金线14没有通电时，弹性件16预变形变形，弹性件16提供侧压力将镜头13、滚珠组件15和基座12压紧，从而给滚珠组件15的三个面产生预压力，滚珠组件不会晃动。由于形状记忆合金线14位于镜头13的一侧，在形状记忆合金线14发生变形，使镜头13沿镜头13的光轴方向移动时，会给镜头13一个向上的力F1，并产生一个逆时针方向的扭矩F2，而两弹性件16被镜头13带动发生变形，两弹性件16会给镜头13的底部一个朝向底板121的力F3向镜头13中心的力F4，两弹性件16给镜头13的力能和逆时针方向的扭矩平衡F2，同时，两弹性件16会驱使镜头13底部、第一滚珠组件151、基座12的侧板紧密接触，从而防止镜头13在移动过程中发生偏转，保证了镜头13的稳定性。
在本实施例中，两弹性件16的结构一致，本实施例仅对一个弹性件16的结构进行说明。
请参阅图15，弹性件16包括弧形本体161和分别连接至弧形本体161两端的第一固定端162和第二固定端163，第一固定端161和底板121连接，第二固定端162和镜头13靠近底板121的一端连接，第二固定端163靠近所述镜头的边沿，第二固定端163即距镜头13的边沿的距离小于镜头13垂直该长度方向长度的四分之一。每一个弹性件16的第二固定端163与弧形本体161之间还包括弯折部164，弯折部164从弧形本体161沿远离另一弹性件16的方向延伸。弯折部164呈“U”形。
弧形本体161朝向镜头13弯曲。弧形本体的宽度和厚度不做限定，可以根据弹性件16变形时需要提供力的大小合理设置弧形本体的宽度和厚度。弧形本体161位弧形，使弧形本体161能以较小的力平衡形状记忆合金线14给镜头13的逆时针扭矩。
第一固定端162上开设第一安装孔1621，第一安装孔1621用于把第一固定端162固定在底板121上。第一安装孔1621可以为通孔。第一安装孔1621和底板121上的凸起1211配合以固定第一固定端162。
第二固定端163上开设第二安装孔1631，第二安装孔1631用于把第二固定端163固定在镜头13上。第二安装孔1631可以为通孔。
请参阅图16，镜头组件10还包括多个分别位于第一导槽135和第二导槽136的远离底板121的一端的阻挡件19。具体的，阻挡件19一端和第一侧板122或第二侧板123连接，阻挡件19的另一端位于第一导槽135或第二导槽136远离底板121的一端。阻挡件19可防止第一导槽135或第二导槽136内的滚珠组件15滚出来。阻挡件19固定在第一侧板122或第二侧板123的位置不做限定，能阻挡滚珠组件15即可。
镜头组件10还包括若干个回弹件（图未示），镜头13远离底板121的一端上沿镜头13的光轴方向开设若干容置孔20，容置孔20为盲孔。回弹件设置在相应的容置孔20内，每一个容置孔20内设置一回弹件，一阻挡件19的一端和第一侧板122或第二侧板123连接时，该阻挡件19的另一端延伸至与容置孔20相对的位置。具体的，在本实施例中，一阻挡件19的一端位于第一导槽135或第二导槽136远离底板121的一端时，该阻挡件19的一端还位于一容置孔20远离底板121的一端，回弹件远离镜头13的一端固定至阻挡件19。阻挡件19能同时防止回弹件从容置孔20内掉出、防止滚珠组件15从第一导槽135或第二导槽136内的滚珠组件15滚出。在本实施例中，容置孔20包括两个，回弹件包括两个，位于远离第三侧板124的第一导槽135一端设置的阻挡件19下设置一容置孔20，位于远离第三侧板124的第二导槽136一端设置的阻挡件19下设置另一容置孔20，两回弹件优选为螺旋弹簧，分别位于一个容置孔20内。回弹件安装在容置孔20内时被预压缩，在形状记忆合金线14没有通电时，回弹件也能给镜头13回复力，使镜头13压在基座12的底板121上。回弹件在形状记忆合金线14通电时，在镜头13运动时也给镜头提供回复力。
请参阅图17，阻挡件19靠近容置孔20的一侧设置凸包，凸包用于设回弹件接触连接。回弹件包括弹簧，弹簧靠近凸包的一端卡设在凸包上。
请参阅图18，镜头组件10还包括磁铁21和传感器（图未示），磁铁设置于所述镜头13上的靠近第三侧板124的一侧，传感器设置于基座12上，传感器用于感测磁铁的位置以感测镜头13的位置。磁铁和镜头13连接时，可在镜头13上开槽，以容置磁铁。传感器优选为霍尔传感器。
镜头组件10还包括电路板22，电路板和基座12的第三侧板124连接，电路板22位于第三侧板124远离镜头13的一侧，电路板22还位于镜头13和外壳11之间。电路板22和传感器电性连接，电路板22包括焊盘221，外壳11上开设的凹孔111用于露出电路板上的焊盘221，能避免电路板发生短路。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (13)

  1. 一种镜头组件，其特征在于：所述镜头组件包括基座、安装至所述基座的镜头、驱动装置和第一滚珠组件，所述驱动装置连接于所述基座和所述镜头之间，所述第一滚珠组件设置在所述镜头和所述基座之间用于引导所述镜头沿镜头的光轴方向相对所述基座滑动，所述第一滚珠组件包括相互接触的第一滚珠和第二滚珠，所述第一滚珠的直径大于所述第二滚珠的直径，所述驱动装置能带动所述镜头沿镜头的光轴方向移动。
  2. 根据权利要求1所述的镜头组件，其特征在于：所述第一滚珠组件包括两个第一滚珠和一个第二滚珠，所述第二滚珠位于两个第一滚珠之间，所述第二滚珠和两个第一滚珠接触。
  3. 根据权利要求1所述的镜头组件，其特征在于：所述基座包括底板、和从底板相对的两侧分别延伸的第一侧板、第二侧板，所述底板、所述第一侧板以及所述第二侧板围合形成收容空间；所述镜头安装在所述收容空间内，所述镜头的光轴方向与所述底板垂直，所述镜头的光轴方向分别和所述第一侧板、第二侧板平行。
  4. 根据权利要求3所述的镜头组件，其特征在于：所述第一侧板朝向所述镜头的一侧上凸设有第一凸部，所述第二侧板朝向所述镜头的一侧凸设有第二凸部，所述镜头相对的两侧反向凸设有与第一凸部相对的第三凸部和与第二凸部相对的第四凸部，所述第一凸部、第三凸部、第一侧板和镜头之间围合形成第一导槽，所述第二凸部、第四凸部、第二侧板和镜头之间围合形成第二导槽，所述第一导槽和所述第二导槽中分别设置第一滚珠组件。
  5. 根据权利要求4所述的镜头组件，其特征在于：所述第一凸部、第二凸部、第三凸部、第四凸部、第一导槽和第二导槽分别包括两个，所述镜头组件还包括第二滚珠组件，所述第二滚珠组件包括至少一个第三滚珠，其中一个所述第一导槽和其中一个所述第二导槽中分别设置第一滚珠组件，其中另一个所述第一导槽和其中另一个所述第二导槽中分别设置第二滚珠组件。
  6. 根据权利要求5所述的镜头组件，其特征在于：所述第一凸部设有用于抵顶第一滚珠组件的第一抵顶面，所述第二凸部设有用于抵顶第二滚珠组件的第二抵顶面，所述镜头对应第一抵顶面设置一对相互垂直的第三抵顶面，所述镜头对应第二抵顶面设置一对相互垂直的第四抵顶面，所述第一抵顶面相对于每一个第三抵顶面倾斜设置，所述第二抵顶面相对于每一个第四抵顶面倾斜设置。
  7. 根据权利要求1所述的镜头组件，其特征在于：所述镜头组件还包括外壳和电路板，所述外壳、电路板分别和所述基座连接，所述镜头位于所述外壳和所述基座之间，所述电路板位于所述镜头和所述外壳之间，所述电路板包括焊盘，所述外壳上开设凹孔，所述凹孔用于露出所述电路板上的焊盘。
  8. 根据权利要求3所述的镜头组件，其特征在于：所述驱动装置包括形状记忆合金线，当所述记忆合金线通电时，所述记忆合金线发生变形以带动所述镜头沿镜头的光轴方向移动。
  9. 根据权利要求8所述的镜头组件，其特征在于：所述形状记忆合金线呈“V”字形，所述形状记忆合金线包括连接至所述基座的两末端和位于两末端之间的V型驱动端，所述镜头上设置有驱动凸部，所述驱动凸部包括V型端部，所述形状记忆合金线的V型驱动端与所述镜头的V型端部配合接触。
  10. 根据权利要求9所述的镜头组件，其特征在于：所述镜头组件还包括第一导电件和第二导电件，所述第一导电件固定在所述第一侧板的远离所述底板的端面上，所述第一导电件和形状记忆合金线的一末端固定连接且电性连接，所述第二导电件固定在所述第二侧板的远离所述底板的端面上，所述第二导电件和形状记忆合金线的另一末端固定连接且电性连接。
  11. 根据权利要求10所述的镜头组件，其特征在于：所述第一侧板、第二侧板和镜头的高度方向平行于所述镜头的光轴方向，所述第一侧板与所述第一导电件连接处的高度大于或等于所述镜头高度的三分之一，所述第二侧板与所述第二导电件连接处的高度大于或等于所述镜头高度的三分之一。
  12. 根据权利要求3所述的镜头组件，其特征在于：所述镜头组件还包括一对弹性件，所述弹性件位于所述镜头和所述底板之间，每一个所述弹性件的一端和所述底板连接，所述弹性件的另一端和所述镜头组件朝向所述底板的一端连接。
  13. 根据权利要求4所述的镜头组件，其特征在于：
    所述镜头还包括多个分别位于所述第一导槽和第二导槽的远离所述底板的一端的阻挡件；
    或所述镜头组件还包括若干个回弹件和多个分别位于所述第一导槽和第二导槽的远离所述底板的一端的阻挡件，所述镜头远离底板的一端上沿镜头的光轴方向开设若干容置孔，所述回弹件设置在相应的容置孔内，所述阻挡件的一端和所述第一侧板或第二侧板连接，所述阻挡件的另一端位于所述容置孔远离底板的一端，所述回弹件远离镜头的一端固定至所述阻挡件。
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