Lens driving apparatus

Abstract

A lens driving apparatus, comprising: a lens module, the lens module having an optical axis; a housing, the housing comprising a bottom plate and an upper cover; a first mount, the first mount being elastically supported on the bottom plate; a second mount, the second mount being elastically supported on the first mount and used for mounting the lens module; a first driving assembly, the first driving assembly being used for driving the second mount to move relative to the first mount in the direction of an optical axis of a light through hole; and a second driving assembly, the second driving assembly being used for driving the second mount to move relative to the bottom plate in a direction perpendicular to the direction of the optical axis. The upper cover comprises a top wall and a side wall. The periphery of the top wall is provided with a clearance platform sinking towards the bottom plate in the direction of the optical axis. When the lens driving apparatus is applied to an electronic device, a decorative member can completely cover the lens driving apparatus, thereby avoiding an increase in the thickness of a housing of the electronic device caused by enabling the decorative member to completely cover the lens driving apparatus.

Description

Lens drive device Technical Field

[0001] This utility model belongs to the field of shooting equipment technology, and in particular relates to a lens driving device. Background Technology

[0002] With the improvement of living standards, digital cameras, digital camcorders, smartphones, tablets and other electronic devices with shooting functions have all been equipped with autofocus cameras. Autofocus cameras require a lens drive device to drive them in order to achieve automatic focusing and optical image stabilization.

[0003] The lens driving device mainly includes a housing, a first bracket, a second bracket spaced apart from the first bracket, a first driving component for driving the lens module to move along its optical axis, and a second driving component for driving the lens module to move in a direction perpendicular to the optical axis.

[0004] In related technologies, the housing includes a base plate and a top cover fixed to the base plate. The side of the base plate and the top cover away from the base plate are both flat. When the lens driving device is applied to an electronic device, due to the design of the electronic device and the limitations of the flat design of the top cover, the decorative parts on the lens may not be able to completely cover the lens driving device. In this case, if the housing of the electronic device needs to completely cover the lens driving device, the thickness of the housing of the electronic device needs to be increased. Technical issues

[0005] This utility model provides a lens driving device, which aims to solve the problem in the related art that when the lens driving device is applied to an electronic device, the decorative part cannot completely cover the lens driving device, thus requiring an increase in the thickness of the electronic device's housing to ensure that the decorative part completely covers the lens driving device. Technical solutions

[0006] In a first aspect, this utility model provides a lens driving device, which includes:

[0007] The lens module has one optical axis;

[0008] The housing includes a base plate and an upper cover that covers the base plate and surrounds the base plate to form a receiving space. The upper cover has a light-transmitting hole that is directly opposite the lens module.

[0009] A first support frame is ring-shaped and elastically supported on the base plate, and the first support frame is located within the receiving space;

[0010] The second bracket is equipped with the lens module and is elastically supported on the inner side of the first bracket and spaced apart from the first bracket.

[0011] A first driving component is used to drive the second bracket to move the lens module relative to the first bracket along the optical axis of the lens module; the first driving component includes a first magnetic circuit system fixed to the first bracket and a driving coil fixed to the second bracket.

[0012] A second driving assembly is used to drive the first bracket to move the second bracket and the lens module relative to the base plate in a direction perpendicular to the optical axis; the second driving assembly includes a second magnetic circuit system and an image stabilization coil spaced apart from the second magnetic circuit system, the second magnetic circuit system being fixed to one of the base plate and the first bracket, and the image stabilization coil being fixed to the other of the base plate and the first bracket; characterized in that,

[0013] The top cover includes a top wall that is directly opposite and spaced from the bottom plate along the optical axis, and a peripheral wall that bends and extends from the periphery of the top wall toward the bottom plate and is fixedly connected to the bottom plate. The periphery of the top wall is provided with a relief platform that sinks toward the bottom plate along the optical axis.

[0014] Preferably, both the housing and the first bracket are rectangular; the clearance platform is located at at least one corner of the top wall, and the clearance platform and the first drive assembly are spaced apart relative to each other along the optical axis.

[0015] Preferably, at least two clearance platforms are provided on the top wall, and the lens driving device further includes a damping component disposed between the top wall and the first bracket, with the clearance platforms corresponding to the damping component along the optical axis direction.

[0016] Preferably, the top wall is provided with at least three clearance platforms, and the lens driving device includes two first driving components, which are respectively disposed at one of a set of diagonal positions of the first bracket.

[0017] Preferably, the lens driving device includes two damping components, which are respectively disposed at another set of diagonal positions of the first bracket.

[0018] Preferably, the damping assembly includes a damping adhesive fixed to the first bracket and a damping member fixed to the side of the clearance platform facing the first bracket, wherein the damping member is inserted into the damping adhesive.

[0019] Preferably, the first bracket has an inwardly recessed groove at the corner position corresponding to the damping component; the damping adhesive is accommodated in the groove.

[0020] Preferably, the lens driving device further includes a first elastic member that elastically supports the second bracket within the first bracket; the first elastic member includes a first fixed arm fixed to the second bracket, a second fixed arm fixed to the first bracket, and a spring arm extending from the first fixed arm to the second fixed arm and forming a fixed connection, the first elastic member being offset from the clearance platform along the optical axis direction.

[0021] Preferably, the second magnetic circuit system is fixed to the base plate, the anti-shake coil is fixed to the side of the first bracket away from the top wall along the optical axis and is spaced apart from the second magnetic circuit system, and the anti-shake coil and the damping component are arranged correspondingly along the optical axis.

[0022] Preferably, the second driving component includes an anti-collision pad disposed on the side of the anti-shake coil facing the second magnetic circuit system, and the anti-collision pad and the second magnetic circuit system are disposed at a distance from each other along the optical axis. Beneficial effects

[0023] Compared with related technologies, the lens driving device of this utility model has a recessed clearance platform set on the periphery of the top wall that is directly opposite and spaced from the base plate, and the recessed direction of the clearance platform is parallel to the optical axis. In this way, when the lens driving device is applied to electronic devices, the clearance platform can be aligned with the position that the decorative part cannot cover, so that the decorative part can completely cover the lens driving device. This avoids the problem of increasing the thickness of the electronic device's casing in order to make the decorative part completely cover the lens driving device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a three-dimensional structural schematic diagram of the lens driving device provided in Embodiment 1 of this utility model;

[0026] Figure 2 is a partial exploded view of the lens driving device provided in Embodiment 1 of this utility model;

[0027] Figure 3 is a cross-sectional view along line AA in Figure 1;

[0028] Figure 4 is a cross-sectional view along line BB in Figure 1;

[0029] Figure 5 is a three-dimensional structural schematic diagram of the lens driving device provided in Embodiment 2 of this utility model;

[0030] Figure 6 is a three-dimensional structural schematic diagram of the lens driving device provided in Embodiment 3 of this utility model;

[0031] Figure 7 is a three-dimensional structural schematic diagram of the lens driving device provided in Embodiment 4 of this utility model;

[0032] Figure 8 is a three-dimensional structural schematic diagram of the electronic device provided in Embodiment 5 of this utility model;

[0033] Figure 9 is a partial exploded view of the electronic device provided in Embodiment 5 of this utility model.

[0034] Among them, 100, lens driving device; 101, lens module; 1, housing; 10, receiving space; 11, base plate; 12, top cover; 121, top wall; 1211, clearance platform; 122, peripheral wall; 13, light-transmitting hole; 2, first bracket; 21, groove; 3, second bracket; 31, clamping arm; 4, first driving assembly; 41, first magnetic circuit system; 411, magnetic bowl; 4111, bowl bottom; 4112, side wall; 412, magnet assembly; 4121, first driving magnet; 4122, pole core; 412 3. Second driving magnet; 413. Upper clamping plate; 42. Driving coil; 5. Second driving assembly; 51. Second magnetic circuit system; 511. Lower clamping plate; 512. First anti-shake magnet; 513. Second anti-shake magnet; 514. Third anti-shake magnet; 52. Anti-collision pad; 53. Anti-shake coil; 6. Damping assembly; 61. Damping adhesive; 62. Damping component; 7. First elastic component; 71. First fixed arm; 72. Second fixed arm; 73. Elastic arm; 8. Second elastic component; 9. Third elastic component; 10. Flexible circuit board.

[0035] 200. Electronic equipment; 201. Housing; 202. Translucent decorative parts. Embodiments of the present invention

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0037] Example 1

[0038] This utility model embodiment provides a lens driving device 100, as shown in Figures 1 to 4, which includes a housing 1, a first bracket 2, a second bracket 3, a first driving component 4, a second driving component 5, and a lens module 101 with an optical axis.

[0039] The housing 1 includes a base plate 11 and an upper cover 12 that covers the base plate 11 and forms a receiving space 10 with the base plate 11. The upper cover 12 is provided with a light-transmitting hole 13 that connects the receiving space 10 to the outside. The light-transmitting hole 13 and the lens module 101 are arranged directly opposite each other along the optical axis of the lens module 101. The first bracket 2, the second bracket 3, the first drive assembly 4, and the second drive assembly 5 are all housed in the receiving space 10. The lens module 101 is at least partially housed in the receiving space 10.

[0040] The top cover 12 includes a top wall 121 that is directly opposite and spaced from the bottom plate 11 along the optical axis, and a peripheral wall 122 that bends and extends from the periphery of the top wall 121 toward the bottom plate 11 and is fixedly connected to the bottom plate 11. The periphery of the top wall 121 is provided with a clearance platform 1211 that sinks toward the bottom plate 11 along the optical axis. The clearance platform 1211 and the first drive assembly 4 are spaced apart from each other along the optical axis.

[0041] In this embodiment, both the housing 1 and the first support 2 are rectangular. Of course, the housing 1 and the first support 2 can also be designed in other shapes, such as circular, trapezoidal, etc.

[0042] The clearance platform 1211 is located at at least one corner of the top wall 121.

[0043] As shown in Figure 1, in this embodiment, there is one obstacle 1211, which is located at any corner of the top wall 121. The number of obstacle 1211 is set according to the number of areas that need to be avoided after the lens driving device 100 applies electronic equipment. There can be two, three or four obstacle 1211.

[0044] In this embodiment, the clearance platform 1211 is triangular. Of course, depending on actual needs, the clearance platform 1211 can also be designed according to the shape of the area to be cleared, such as a rectangle or a semicircle.

[0045] The first support 2 is ring-shaped and elastically supported on the base plate 11.

[0046] The second bracket 3 is elastically supported on the inner side of the first bracket 2 and is spaced apart from the first bracket 2; the second bracket 3 is directly opposite the light-transmitting hole 13 and is used to install the lens module 101.

[0047] In this embodiment, the first driving component 4 includes two components, which are respectively disposed at one of a set of diagonal positions of the first bracket 2. The two first driving components 4 are used to jointly drive the second bracket 3 to move the lens module 101 relative to the first bracket 2 along the optical axis of the lens module 101. Of course, depending on actual needs, the first driving component 4 can also be designed as a single component.

[0048] The first driving assembly 4 includes a first magnetic circuit system 41 fixed to the first bracket 2 and a driving coil 42 fixed to the second bracket 3. The first magnetic circuit system 41 includes a magnetic bowl 411 fixed to the first bracket 2, a magnet assembly 412 stacked and fixed inside the magnetic bowl 411, and an upper clamping plate 413 stacked and fixed to the open end of the magnetic bowl 411. The magnetic bowl 411 has two notches extending along the optical axis of the lens module 101 on opposite sides. The driving coil 42 is located inside the magnetic bowl 411 and is arranged around the magnet assembly 412 and spaced apart from the magnet assembly 412. The second bracket 3 has two clamping arms 31 extending from the two notches into the magnetic bowl 411. The two clamping arms 31 are fixedly connected to the driving coil 42.

[0049] The magnetic bowl 411 includes a bowl bottom 4111 and a side wall 4112 extending from the circumference of the bowl bottom 4111, with two notches formed in the side wall 4112; the magnet assembly 412 includes a first driving magnet 4121 stacked and fixed to the bowl bottom 4111, a pole core 4122 stacked and fixed to the side of the first driving magnet 4121 away from the bowl bottom 4111, and a second driving magnet 4123 stacked and fixed to the side of the pole core 4122 away from the first driving magnet 4121, with an upper clamping plate 413 stacked and fixed to the side of the second driving magnet 4123 away from the pole core 4122.

[0050] The second drive assembly 5 is used to drive the second bracket 3 to move the first bracket 2 and the lens module 101 relative to the base plate 11 along the optical axis perpendicular to the lens module 101.

[0051] The second drive assembly 5 includes two sets, which are located at opposite corners of the other set of the first bracket 2. Each set of the second drive assembly 5 includes two second drive assemblies 5 located on adjacent sides of the first bracket 2.

[0052] The second drive assembly 5 includes a second magnetic circuit system 51, a stabilization coil 53 facing and spaced apart from the second magnetic circuit system 51, and an anti-collision pad 52 disposed on the side of the stabilization coil 53 facing the second magnetic circuit system 51. The second magnetic circuit system 51 is fixed to one of the base plate 11 and the first bracket 2, and the stabilization coil 53 is fixed to the other of the base plate 11 and the first bracket 2. The anti-collision pad 52 is used to prevent the stabilization coil 53 from colliding with the second magnetic circuit system 51 in the event of a fall.

[0053] In this embodiment, the second magnetic circuit system 51 is fixed to the base plate 11, and the anti-shake coil 53 is fixed to the side of the first bracket 2 away from the top wall 121 along the optical axis.

[0054] The second magnetic circuit system 51 includes a lower clamping plate 511 fixed to the base plate 11, and a first anti-shake magnet 512, a second anti-shake magnet 513, and a third anti-shake magnet 514 stacked and fixed to the lower clamping plate 511 and arranged in sequence along the optical axis direction perpendicular to the lens module 101. The first anti-shake magnet 512, the second anti-shake magnet 513, and the third anti-shake magnet 514 are fixedly connected to each other.

[0055] The lens driving device 100 also includes a damping component 6 disposed between the top wall 121 and the first support 2. The damping component 6 is located at the corner position adjacent to the first drive component 4 on the first support 2, and is located on the side of the first support 2 away from the base plate 11. One or two damping components 6 can be designed, depending on the location and number of areas that the lens driving device 100 needs to avoid after applying electronic equipment. If the clearance platform 1211 corresponds to a corner position on the first support 2 adjacent to the first drive component 4, then one damping component 6 is designed; if the clearance platform 1211 corresponds to two corner positions on the first support 2 adjacent to the first drive component 4, then two damping components 6 are designed. The two first drive components 4 are respectively disposed at one set of diagonal positions on the first support 2, and the two damping components 6 are respectively disposed at the other set of diagonal positions on the first support 2. Specifically, the damping assembly 6 includes a damping adhesive 61 fixed to the first bracket 2 and a damping element 62 fixed to the side of the clearance platform 1211 facing the first bracket 1. The damping element 62 is inserted into the damping adhesive 61. When the lens module 101 moves along the direction perpendicular to the optical axis, the damping assembly 6 can absorb additional vibrations, ensuring that the lens drive device 100 has a good image stabilization effect and improving image quality.

[0056] The first bracket 2 has an inwardly recessed groove 21 at the corner position corresponding to the damping component 6; the damping adhesive 61 is housed in the groove 21. The anti-shake coil 53 is arranged correspondingly to the damping component 6 along the optical axis.

[0057] The present invention sets the first driving component 4 at one of the diagonal corners of the first bracket 2 and sets the damping component 6 at the other corner. In this way, when the corner of the top wall 121 of the upper cover 12 needs to be lowered to form a clearance platform 1211, it is only necessary to lower the corresponding area of ​​the first driving component 4 and / or the damping component 6 to make clearance, and it will not affect the performance of the lens driving device 100.

[0058] The lens driving device 100 also includes a first elastic element 7 that elastically supports the second bracket 3 within the first bracket 2. The first elastic elements 7 are spaced apart on the side of the second bracket 3 away from the base plate 11. The first elastic element 7 includes a first fixing arm 71 fixed to the second bracket 3, a second fixing arm 72 fixed to the first bracket 2, and a spring arm 73 extending from the first fixing arm 71 to the second fixing arm 72 and forming a fixed connection. The second fixing arm 72 is fixed to the side of the first bracket 2. The first elastic element 7 is offset from the clearance platform 1211 along the optical axis direction.

[0059] In this embodiment, the first elastic element 7 includes three: the first first elastic element 7a includes a first fixed arm 71 fixed to the second bracket 3, two second fixed arms 72 fixed to the first bracket 2, and a spring arm 73 extending from both ends of the first fixed arm 71 to the two second fixed arms 72 and forming a fixed connection; the second first elastic element 7b includes a first fixed arm 71 fixed to the second bracket 3, a second fixed arm 72 fixed to the first bracket 2, and a spring arm 73 extending from the middle region of the first fixed arm 71 to the second fixed arm 72 and forming a fixed connection; the third first elastic element 7c includes a first fixed arm 71 fixed to the second bracket 3, a second fixed arm 72 fixed to the first bracket 2, and a spring arm 73 extending directly from the first fixed arm 71 to the second fixed arm 72 and forming a fixed connection.

[0060] The lens driving device 100 also includes four second elastic elements 8, which are respectively spaced apart on the side of the first bracket 2 near the base plate 11. The two ends of each second elastic element 8 are respectively connected to the first bracket 2 and the second bracket 3. The structure of the second elastic element 8 is the same as that of the third first elastic element 7.

[0061] The lens drive device 100 also includes two third elastic elements 9, each of which is elastically connected to the base plate 11 and the first bracket 2 respectively.

[0062] The lens drive device 100 also includes a flexible circuit board 10, which is fixed to the first bracket 2 and has one end extending outside the housing 1. The flexible circuit board 10 is electrically connected to all the drive coils 42 and all the image stabilization coils 53.

[0063] Compared with related technologies, the lens driving device 100 in this embodiment provides a relief platform 1211 that is recessed toward the base plate 11 at one or more corner positions of the top wall 121 that is directly opposite to and spaced apart from the base plate 11. The recessed direction of the relief platform 1211 is parallel to the optical axis of the lens module 101. In this way, when the lens driving device 100 is applied to an electronic device, the relief platform 1211 can be aligned with the position that the decorative part cannot cover, so that the decorative part can completely cover the lens driving device 100. This avoids the problem of increasing the thickness of the electronic device's casing in order to make the decorative part completely cover the lens driving device 100.

[0064] Example 2

[0065] The difference between this embodiment and the first embodiment is that, as shown in Figure 5, the top wall 121 in this embodiment has a clearance platform 1211 at each of the two adjacent corners.

[0066] Example 3

[0067] The difference between this embodiment and the first embodiment is that, as shown in Figure 6, the top wall 121 in this embodiment is provided with a clearance platform 1211 at each of the three corners.

[0068] Example 4

[0069] The difference between this embodiment and the first embodiment is that, as shown in Figure 7, the top wall 121 in this embodiment is provided with a clearance platform 1211 at each of the four corners.

[0070] Example 5

[0071] This utility model provides an electronic device 200, as shown in Figures 8 and 9, which includes a housing 201, a lens driving device 100 fixed inside the housing 201 as described in any one of the embodiments 1 to 4 above, and a light-transmitting decorative component 202 that covers and is fixed to the housing 201 and covers the lens driving device 100. The light-transmitting decorative component 202 partially covers and is fixed to the clearance platform 1211.

[0072] Electronic device 200 refers to devices with shooting functions such as mobile phones, tablets, and game consoles.

[0073] Since the electronic device 200 in this embodiment includes the lens driving device 100 of any one of the embodiments 1 to 4 above, it can also achieve the technical effects achieved by the lens driving device 100 in any one of the embodiments 1 to 4 above, which will not be described in detail here.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lens driving device, comprising: The lens module has one optical axis; The housing includes a base plate and an upper cover that covers the base plate and surrounds the base plate to form a receiving space. The upper cover has a light-transmitting hole that is directly opposite the lens module. A first support frame is ring-shaped and elastically supported on the base plate, and the first support frame is located within the receiving space; The second bracket is equipped with the lens module and is elastically supported on the inner side of the first bracket and spaced apart from the first bracket. A first driving component is used to drive the second bracket to move the lens module relative to the first bracket along the optical axis of the lens module; the first driving component includes a first magnetic circuit system fixed to the first bracket and a driving coil fixed to the second bracket. A second driving assembly is used to drive the first bracket to move the second bracket and the lens module relative to the base plate in a direction perpendicular to the optical axis; the second driving assembly includes a second magnetic circuit system and an image stabilization coil spaced apart from the second magnetic circuit system, the second magnetic circuit system being fixed to one of the base plate and the first bracket, and the image stabilization coil being fixed to the other of the base plate and the first bracket; characterized in that, The top cover includes a top wall that is directly opposite and spaced from the bottom plate along the optical axis, and a peripheral wall that bends and extends from the periphery of the top wall toward the bottom plate and is fixedly connected to the bottom plate. The periphery of the top wall is provided with a relief platform that sinks toward the bottom plate along the optical axis.

2. The lens driving device as described in claim 1, characterized in that, Both the housing and the first bracket are rectangular; the clearance platform is located at at least one corner of the top wall, and the clearance platform and the first drive assembly are spaced apart from each other along the optical axis.

3. The lens driving device as described in claim 2, characterized in that, At least two clearance platforms are provided on the top wall, and the lens driving device further includes a damping component disposed between the top wall and the first bracket. The clearance platforms are disposed corresponding to the damping component along the optical axis.

4. The lens driving device as described in claim 3, characterized in that, The top wall is provided with at least three clearance platforms, and the lens driving device includes two first driving components, which are respectively arranged at one of the diagonal positions of the first bracket.

5. The lens driving device as described in claim 4, characterized in that, The lens driving device includes two damping components, which are respectively disposed at another set of diagonal positions of the first bracket.

6. The lens driving device as described in claim 3, characterized in that, The damping assembly includes damping adhesive fixed to the first bracket and a damping member fixed to the side of the clearance platform facing the first bracket, with the damping member inserted into the damping adhesive.

7. The lens driving device as described in claim 6, characterized in that, The first bracket has an inwardly recessed groove at the corner position corresponding to the damping component; the damping adhesive is accommodated in the groove.

8. The lens driving device as described in claim 2, characterized in that, The lens driving device further includes a first elastic member that elastically supports the second bracket within the first bracket; the first elastic member includes a first fixed arm fixed to the second bracket, a second fixed arm fixed to the first bracket, and a spring arm extending from the first fixed arm to the second fixed arm and forming a fixed connection, and the first elastic member is offset from the clearance platform along the optical axis direction.

9. The lens driving device as described in claim 2, characterized in that, The second magnetic circuit system is fixed to the base plate, and the anti-shake coil is fixed to the side of the first bracket away from the top wall along the optical axis and is spaced apart from the second magnetic circuit system. The anti-shake coil and the damping component are arranged correspondingly along the optical axis.

10. The lens driving device as claimed in claim 9, characterized in that, The second drive assembly includes an anti-collision pad disposed on the side of the anti-shake coil facing the second magnetic circuit system, the anti-collision pad and the second magnetic circuit system being spaced apart relative to each other along the optical axis.

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