Lens driving device

Abstract

The utility model provides a lens driving device. The lens driving device comprises a lens module with an optical axis; the shell comprises a bottom plate and an upper cover; the first bracket is elastically supported on the bottom plate; the second bracket is elastically supported on the first bracket and is used for mounting a lens module; the first driving assembly is used for driving the second support to move in the optical axis direction of the light through hole relative to the first support; the second driving assembly is used for driving the second support to move relative to the bottom plate in the direction perpendicular to the optical axis. The upper cover comprises a top wall and a side wall, and the periphery of the top wall is provided with an avoiding table sinking towards the bottom plate in the optical axis direction. After the lens driving device is applied to the electronic equipment, the decorative part can completely cover the lens driving device, so that the problem that the thickness of a shell of the electronic equipment is increased in order to enable the decorative part to completely cover the lens driving device is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photographic equipment technical field, especially relate to a lens drive device. BACKGROUND

[0002] With the improvement of living standards, some electronic devices with shooting function such as digital camera, digital video camera, smart phone, tablet computer have all been provided with automatic focusing camera, and the automatic focusing camera needs to be driven by lens drive device to realize automatic focusing and optical anti-shake.

[0003] The lens drive device mainly comprises a shell, a first support, a second support spaced from the first support, a first drive assembly for driving the lens module to move along the optical axis direction, and a second drive assembly for driving the lens module to move along the direction perpendicular to the optical axis.

[0004] In the related art, the shell comprises a bottom plate and an upper cover fixed to the bottom plate, and the side, away from the bottom plate, of the bottom plate and the upper cover is flat, when the lens drive device is applied to the electronic device, due to the design of the electronic device and the flat design of the upper cover, sometimes the decoration piece on the lens cannot completely cover the lens drive device, in this case, if the shell of the electronic device needs to completely cover the lens drive device, the thickness of the shell of the electronic device needs to be increased. SUMMARY

[0005] The utility model embodiment provides a kind of lens drive device, to solve the problem that the decoration piece cannot completely cover the lens drive device when the lens drive device in the related art is applied to electronic device, so the thickness of the shell of the electronic device needs to be increased to make the decoration piece completely cover the lens drive device.

[0006] In the first aspect, the utility model provides a kind of lens drive device, it includes:

[0007] Lens module, with a optical axis;

[0008] Shell, the shell includes bottom plate and upper cover, the upper cover is arranged on the bottom plate and is surrounded with the bottom plate to form the receiving space, the upper cover is provided with the light hole that is opposite to the lens module;

[0009] First support, the first support is annular and is elastically supported on the bottom plate, and the first support frame is located in the receiving space;

[0010] Second support, the lens module is installed, and the second support is elastically supported on the inner side of the first support and is spaced apart from the first support;

[0011] A first driving assembly is configured to drive the second holder to move the lens module relative to the first holder along an optical axis of the lens module; the first driving assembly comprises a first magnetic circuit system fixed to the first holder and a driving coil fixed to the second holder;

[0012] A second driving assembly is configured to drive the first holder to move the second holder and the lens module relative to the bottom plate along a direction perpendicular to the optical axis; the second driving assembly comprises a second magnetic circuit system and an anti-shake coil oppositely spaced from the second magnetic circuit system, the second magnetic circuit system being fixed to one of the bottom plate and the first holder, and the anti-shake coil being fixed to the other one of the bottom plate and the first holder; characterized in that,

[0013] The upper cover comprises a top wall oppositely spaced from the bottom plate along the optical axis, and a peripheral wall bent and extended from a peripheral edge of the top wall towards the bottom plate and fixedly connected with the bottom plate, and the peripheral edge of the top wall is provided with an avoiding platform sunken towards the bottom plate along the optical axis.

[0014] Preferably, the shell and the first holder are both rectangular; the avoiding platform is arranged at at least one corner position of the top wall, and the avoiding platform is oppositely spaced from the first driving assembly along the optical axis.

[0015] Preferably, at least two avoiding platforms are arranged on the top wall, and the lens driving device further comprises a damping assembly arranged between the top wall and the first holder, and the avoiding platforms are correspondingly arranged with the damping assembly along the optical axis.

[0016] Preferably, at least three avoiding platforms are arranged on the top wall, and the lens driving device comprises two first driving assemblies, and the two first driving assemblies are correspondingly arranged at one set of opposite corner positions of the first holder.

[0017] Preferably, the lens driving device comprises two damping assemblies, and the two damping assemblies are correspondingly arranged at another set of opposite corner positions of the first holder.

[0018] Preferably, the damping assembly comprises a damping rubber fixed to the first holder and a damping member fixed to a side of the avoiding platform facing the first holder, and the damping member is inserted into the damping rubber.

[0019] Preferably, the first holder is provided with a groove formed by inwardly recessing at a corner position corresponding to the damping assembly; and the damping rubber is accommodated in the groove.

[0020] Preferably, the lens driving device further comprises a first elastic member elastically supporting the second support in the first support; the first elastic member comprises a first fixed arm fixed to the second support, a second fixed arm fixed to the first support, and an elastic arm extending from the first fixed arm to the second fixed arm and forming a fixed connection, and the first elastic member is arranged in a staggered manner along the optical axis direction with the avoiding platform.

[0021] Preferably, the second magnetic circuit system is fixed to the bottom plate, the anti-shake coil is fixed to the first support and arranged in a spaced manner along the optical axis direction away from the top wall and opposite to the second magnetic circuit system, and the anti-shake coil and the damping assembly are arranged in a corresponding manner along the optical axis direction.

[0022] Preferably, the second driving assembly comprises an anti-collision pad arranged on a side of the anti-shake coil facing the second magnetic circuit system, and the anti-collision pad and the second magnetic circuit system are arranged in a spaced manner along the optical axis direction.

[0023] Compared with the related art, in the lens driving device, the avoiding platform sinking in the direction facing the bottom plate is arranged on the periphery of the top wall opposite to and spaced from the bottom plate, and the sinking direction of the avoiding platform is parallel to the optical axis direction, so that when the lens driving device is applied to the electronic device, the avoiding platform can be aligned with the position that cannot be covered by the decoration piece, so that the effect that the decoration piece can completely cover the lens driving device is achieved, thereby avoiding the problem that the shell thickness of the electronic device is increased in order to make the decoration piece completely cover the lens driving device. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 is a perspective structural schematic view of the lens driving device provided by Embodiment One of the present application;

[0026] Figure 2 is a partial structure exploded view of the lens driving device provided by Embodiment One of the present application;

[0027] Figure 3 is a sectional view along the A-A line of Figure 1 ;

[0028] Figure 4 is a sectional view along the B-B line of Figure 1 ;

[0029] Figure 5 is a perspective structure schematic diagram of a lens driving device provided by the embodiment two of the utility model;

[0030] Figure 6 is a perspective structure schematic diagram of a lens driving device provided by the embodiment three of the utility model;

[0031] Figure 7 is a perspective structure schematic diagram of a lens driving device provided by the embodiment four of the utility model;

[0032] Figure 8 is a perspective structure schematic diagram of an electronic equipment provided by the embodiment five of the utility model;

[0033] Figure 9 is a partial structure exploded view of the electronic equipment provided by the embodiment five of the utility model.

[0034] 100, lens driving device; 101, lens module; 1, shell; 10, containing space; 11, bottom plate; 12, upper cover; 121, top wall; 1211, avoiding table; 122, peripheral wall; 13, light hole; 2, first support; 21, groove; 3, second support; 31, clamping arm; 4, first driving assembly; 41, first magnetic circuit system; 411, magnetic bowl; 4111, bowl bottom; 4112, side wall; 412, magnetic steel assembly; 4121, first driving magnetic steel; 4122, pole core; 4123, second driving magnetic steel; 413, upper clamping plate; 42, driving coil; 5, second driving assembly; 51, second magnetic circuit system; 511, lower clamping plate; 512, first anti-shake magnetic steel; 513, second anti-shake magnetic steel; 514, third anti-shake magnetic steel; 52, anti-collision gasket; 53, anti-shake coil; 6, damping assembly; 61, damping glue; 62, damping piece; 7, first elastic piece; 71, first fixed arm; 72, second fixed arm; 73, elastic arm; 8, second elastic piece; 9, third elastic piece; 10, flexible circuit board.

[0035] 200, electronic equipment; 201, shell; 202, light-transmitting decoration piece. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0037] Embodiment one

[0038] The embodiment of the utility model provides a lens driving device 100, combines Figures 1 to 4As shown, it includes a housing 1, a first bracket 2, a second bracket 3, a first drive assembly 4, a second drive assembly 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] like Figure 1 As shown, 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 assembly 4 includes two, two first driving assemblies 4 are respectively arranged at one group of diagonal positions of the first support 2, and the two first driving assemblies 4 are used to jointly drive the second support 3 to drive the lens module 101 to move relative to the first support 2 along the optical axis direction of the lens module 101. Of course, according to actual needs, the first driving assembly 4 can also be designed as one.

[0048] The first driving assembly 4 includes a first magnetic circuit system 41 fixed to the first support 2 and a driving coil 42 fixed to the second support 3; the first magnetic circuit system 41 includes a magnetic bowl 411 fixed to the first support 2, a magnetic steel assembly 412 stacked and fixed in the magnetic bowl 411, and an upper clamping plate 413 stacked and fixed to the opening end of the magnetic bowl 411, the opposite sides of the magnetic bowl 411 are provided with two notches extending along the optical axis direction of the lens module 101, the driving coil 42 is located in the magnetic bowl 411 and is arranged around the magnetic steel assembly 412 and is spaced from the magnetic steel assembly 412, and the second support 3 is provided with two clamping arms 31 respectively extending into the magnetic bowl 411 from the two notches, and the two clamping arms 31 are respectively in fixed connection with the driving coil 42.

[0049] The magnetic bowl 411 includes a bowl bottom 4111 and a side wall 4112 bent and extended from the circumferential side of the bowl bottom 4111, and the two notches are both formed in the side wall 4112; the magnetic steel assembly 412 includes a first driving magnetic steel 4121 stacked and fixed to the bowl bottom 4111, a pole core 4122 stacked and fixed to the side of the first driving magnetic steel 4121 away from the bowl bottom 4111, and a second driving magnetic steel 4123 stacked and fixed to the side of the pole core 4122 away from the first driving magnetic steel 4121, and the upper clamping plate 413 is stacked and fixed to the side of the second driving magnetic steel 4123 away from the pole core 4122.

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

[0051] The second driving assembly 5 includes two groups, two groups of second driving assemblies 5 are respectively located at the other group of diagonal positions of the first support 2, and each group of second driving assemblies 5 includes two second driving assemblies 5 respectively located at the adjacent two sides of the first support 2.

[0052] The second driving assembly 5 includes a second magnetic circuit system 51, an anti-shake coil 53 opposite to and spaced from the second magnetic circuit system 51, and an anti-collision pad 52 provided on the side of the anti-shake coil 53 facing the second magnetic circuit system 51, and the second magnetic circuit system 51 is fixed to one of the bottom plate 11 and the first support 2, and the anti-shake coil 53 is fixed to the other one of the bottom plate 11 and the first support 2. The anti-collision pad 52 is used to prevent the anti-shake coil 53 from colliding with the second magnetic circuit system 51 when falling.

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

[0054] The second magnetic circuit system 51 comprises a lower clamping plate 511 fixed to the bottom plate 11, a first anti-shake magnetic steel 512, a second anti-shake magnetic steel 513 and a third anti-shake magnetic steel 514 sequentially arranged along the optical axis direction perpendicular to the lens module 101 and fixed to the lower clamping plate 511, and the first anti-shake magnetic steel 512, the second anti-shake magnetic steel 513 and the third anti-shake magnetic steel 514 are fixedly connected with each other.

[0055] The lens driving device 100 further comprises a damping assembly 6 arranged between the top wall 121 and the first support 2, the damping assembly 6 is arranged at a corner position adjacent to the first driving assembly 4 of the first support 2, and the damping assembly 6 is located at a side of the first support 2 away from the bottom plate 11. The damping assembly 6 can be designed as one or two, which is set according to the area position and number of the electronic device to which the lens driving device 100 is applied and needs to be avoided. If the avoidance platform 1211 corresponds to one corner position adjacent to the first driving assembly 4 of the first support 2, one damping assembly 6 is designed. If the avoidance platform 1211 corresponds to two corner positions adjacent to the first driving assembly 4 of the first support 2, two damping assemblies 6 are designed. Two first driving assemblies 4 are respectively arranged at one set of opposite corner positions of the first support 2, and two damping assemblies 6 are respectively arranged at another set of opposite corner positions of the first support 2. Specifically, the damping assembly 6 comprises a damping rubber 61 fixed to the first support 2 and a damping piece 62 fixed to the avoidance platform 1211 on the side facing the first support 1, and the damping piece 62 is inserted into the damping rubber 61. When the lens module 101 moves along the direction perpendicular to the optical axis, the damping assembly 6 can absorb the additional vibration, so as to ensure that the lens driving device 100 has good anti-shake effect and improve the imaging quality.

[0056] The first support 2 is provided with a recess 21 formed by inwardly recessing at the corner position corresponding to the damping assembly 6; and the damping rubber 61 is accommodated in the recess 21. The anti-shake coil 53 and the damping assembly 6 are arranged corresponding to each other along the optical axis direction.

[0057] The first driving assembly 4 is arranged at one set of opposite corners of the first support 2, and the damping assembly 6 is arranged at the other set of opposite corners. Therefore, when the corner position of the top wall 121 of the upper cover 12 needs to be sunken to form the avoidance platform 1211, only the corresponding area of the first driving assembly 4 and / or the damping assembly 6 needs to be sunken to avoid, and the performance of the lens driving device 100 will not be affected.

[0058] The lens driving device 100 further comprises a first elastic member 7 elastically supporting the second support 3 in the first support 2, the first elastic member 7 being arranged at a side of the second support 3 away from the bottom plate 11; the first elastic member 7 comprises a first fixed arm 71 fixed to the second support 3, a second fixed arm 72 fixed to the first support 2, and an elastic arm 73 extending from the first fixed arm 71 to the second fixed arm 72 and fixedly connected, the second fixed arm 72 being fixed to a side edge of the first support 2, and the first elastic member 7 being arranged in a staggered manner with the avoiding table 1211 along the optical axis direction.

[0059] In the embodiment, the first elastic member 7 comprises three; a first first elastic member 7a comprises a first fixed arm 71 fixed to the second support 3, two second fixed arms 72 fixed to the first support 2, and elastic arms 73 extending from both ends of the first fixed arm 71 to the two second fixed arms 72 and fixedly connected; a second first elastic member 7b comprises a first fixed arm 71 fixed to the second support 3, a second fixed arm 72 fixed to the first support 2, and an elastic arm 73 extending from a middle region of the first fixed arm 71 to the second fixed arm 72 and fixedly connected; and a third first elastic member 7c comprises a first fixed arm 71 fixed to the second support 3, a second fixed arm 72 fixed to the first support 2, and an elastic arm 73 extending directly from the first fixed arm 71 to the second fixed arm 72 and fixedly connected.

[0060] The lens driving device 100 further comprises four second elastic members 8, the four second elastic members 8 being arranged at a side of the first support 2 close to the bottom plate 11 in a spaced manner, and both ends of each second elastic member 8 being connected to the first support 2 and the second support 3 respectively; the structure of the second elastic member 8 is the same as that of the third first elastic member 7.

[0061] The lens driving device 100 further comprises two third elastic members 9, each third elastic member being elastically connected to the bottom plate 11 and the first support 2 respectively.

[0062] The lens driving device 100 further comprises a flexible circuit board 10, the flexible circuit board 10 being fixed to the first support 2 and one end of the flexible circuit board 10 extending out of the housing 1, the flexible circuit board 10 being electrically connected to all the driving coils 42 and all the anti-shake coils 53.

[0063] Compared with the related art, the lens driving device 100 in the embodiment can make the avoiding platform 1211 align with the position that the decoration member cannot cover, so as to achieve the effect that the decoration member can completely cover the lens driving device 100, thereby avoiding the problem that the shell thickness of the electronic device is increased in order to make the decoration member completely cover the lens driving device 100.

[0064] Embodiment two

[0065] Different from the above-mentioned embodiment one, as shown in the figure, the two adjacent corner positions of the top wall 121 in the embodiment are provided with the avoiding platform 1211. Figure 5

[0066] Embodiment three

[0067] Different from the above-mentioned embodiment one, as shown in the figure, the three corner positions of the top wall 121 in the embodiment are provided with the avoiding platform 1211. Figure 6

[0068] Embodiment four

[0069] Different from the above-mentioned embodiment one, as shown in the figure, the four corner positions of the top wall 121 in the embodiment are provided with the avoiding platform 1211. Figure 7

[0070] Embodiment five

[0071] The utility model provides a kind of electronic equipment 200, as shown in the figure, it includes shell 201, fixed in shell 201 like the lens driving device 100 of any one embodiment of the above-mentioned embodiment one to embodiment four and cover and be fixed in shell 201 and cover lens driving device 100 The light-transmitting decoration member 202 of the transparent decoration member 202, the transparent decoration member 202 is partially covered and fixed in avoiding platform 1211. Figures 8 to 9

[0072] Electronic equipment 200 is the device with shooting function such as mobile phone, tablet computer and game machine.

[0073] Since the electronic equipment 200 in the embodiment includes the lens driving device 100 of any one embodiment of the above-mentioned embodiment one to embodiment four, it can also achieve the technical effects achieved by the lens driving device 100 in any one embodiment of the above-mentioned embodiment one to embodiment four, which will not be repeated here.

[0074] ​​​​The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lens driving device, comprising: a lens module having an optical axis; a housing including a bottom plate and an upper cover arranged on the bottom plate and surrounding the bottom plate to form a receiving space, the upper cover being provided with a light passing hole opposite to the lens module; a first support ring elastically supported on the bottom plate in a ring shape, the first support ring being located in the receiving space; a second support ring on which the lens module is mounted, the second support ring being elastically supported on the inner side of the first support ring and being arranged in a spaced manner with the first support ring; a first driving assembly for driving the second support ring to drive the lens module to move relative to the first support ring along the optical axis of the lens module, the first driving assembly including a first magnetic circuit system fixed to the first support ring and a driving coil fixed to the second support ring; a second driving assembly for driving the first support ring to drive the second support ring and the lens module to move relative to the bottom plate along a direction perpendicular to the optical axis, the second driving assembly including a second magnetic circuit system and an anti-shake coil opposite to the second magnetic circuit system, the second magnetic circuit system being fixed to one of the bottom plate and the first support ring, and the anti-shake coil being fixed to the other one of the bottom plate and the first support ring; characterized in that the upper cover includes a top wall opposite to the bottom plate and spaced from the bottom plate along the optical axis, and a peripheral wall bent and extended from the peripheral edge of the top wall towards the bottom plate and fixedly connected with the bottom plate, the peripheral edge of the top wall being provided with an avoidance platform sunken towards the bottom plate along the optical axis.

2. The lens driving device according to claim 1, wherein The housing and the first support ring are both rectangular, the avoidance platform is arranged at at least one corner position of the top wall, and the avoidance platform and the first driving assembly are opposite and spaced along the optical axis.

3. The lens driving apparatus according to claim 2, wherein The top wall is provided with at least two avoidance platforms, and the lens driving device further includes a damping assembly arranged between the top wall and the first support ring, the avoidance platforms being arranged corresponding to the damping assembly along the optical axis.

4. The lens driving apparatus according to claim 3, wherein The top wall is provided with at least three avoidance platforms, and the lens driving device includes two first driving assemblies, the two first driving assemblies being arranged corresponding to each other at one set of diagonal positions of the first support ring.

5. The lens driving apparatus according to claim 4, wherein The lens driving device includes two damping assemblies, the two damping assemblies being arranged corresponding to each other at another set of diagonal positions of the first support ring.

6. The lens driving apparatus according to claim 3, wherein The damping assembly includes a damping rubber fixed to the first support ring and a damping member fixed to the side of the avoidance platform facing the first support ring, the damping member being inserted into the damping rubber.

7. The lens driving apparatus according to claim 6, wherein The corner position of the first support ring corresponding to the damping assembly is provided with a groove formed by inwardly recessing, and the damping rubber is accommodated in the groove.

8. The lens driving apparatus according to claim 2, wherein The lens driving device further comprises a first elastic member elastically supporting the second support in the first support; the first elastic member comprises a first fixed arm fixed to the second support, a second fixed arm fixed to the first support, and an elastic arm extending from the first fixed arm to the second fixed arm and forming a fixed connection, and the first elastic member is disposed in a staggered manner along the optical axis direction with the avoiding platform.

9. The lens driving apparatus according to claim 3, wherein The second magnetic circuit system is fixed to the bottom plate, the anti-shake coil is fixed to the first support and is disposed in a spaced manner along the optical axis direction away from the side of the top wall and opposite to the second magnetic circuit system, and the anti-shake coil and the damping assembly are disposed in a corresponding manner along the optical axis direction.

10. The lens driving apparatus according to claim 9, wherein The second driving assembly comprises an anti-collision pad provided 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 in a spaced manner along the optical axis direction.

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