Lens drive device

Abstract

The utility model discloses a lens driving device, comprising a base, a prism carrier, a zoom carrier, a prism driving mechanism and a zoom driving mechanism, wherein the base is provided with a prism carrier accommodating cavity and a zoom carrier accommodating cavity in sequence along the length direction, the prism carrier is used to install a prism and is arranged in the prism carrier accommodating cavity, the zoom carrier is used to install a zoom lens and is arranged in the zoom carrier accommodating cavity, the zoom driving mechanism drives the zoom carrier to move along a first direction, the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction, an anti-shake shaft is arranged between the prism carrier and the base, the anti-shake shaft comprises a nodding shaft extending along the second direction and a shaking shaft extending along the first direction, wherein the prism carrier is provided with an anti-shake shaft accommodating groove, the anti-shake shaft is installed in the anti-shake shaft accommodating groove, and two ends of the nodding shaft are arranged in the nodding shaft installation groove of the base.

Description

Technical Field

[0001] The utility model relates to the field of optical driving, in particular to a lens driving device. Background Art

[0002] The periscope lens structure usually includes two parts, namely the lens part and the prism part, wherein the prism part is arranged at the front end of the periscope part, and the imaging chip is arranged at the rear end of the lens part, and the light is reflected by the prism part and enters the lens part. Among them, the prism part realizes the optical image stabilization function, and the zoom part realizes the optical zoom function. However, the lens part and the prism part in the prior art are two independent devices, and the production process is complicated. In addition, the prism part usually bears a large activity resistance during the anti-shake movement, resulting in insufficient response. Utility Model Content

[0003] The purpose of the utility model is to provide a lens driving device to solve at least part of the problems existing in the above-mentioned prior art.

[0004] In order to solve the above problems, according to one aspect of the utility model, a lens driving device is provided, the lens driving device comprising a base, a prism carrier, a zoom carrier, a prism driving mechanism and a zoom driving mechanism, the base is provided with a prism carrier accommodating cavity and a zoom carrier accommodating cavity in sequence along the length direction, the prism carrier is used to install a prism and is arranged in the prism carrier accommodating cavity, the zoom carrier is used to install a zoom lens and is arranged in the zoom carrier accommodating cavity,

[0005] The zoom driving mechanism drives the zoom carrier to move along a first direction, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction.

[0006] An anti-shake axis is arranged between the prism carrier and the base, and the anti-shake axis includes a nodding axis extending along the second direction and a shaking axis extending along the first direction, wherein the prism carrier is provided with an anti-shake axis accommodating groove, the anti-shake axis is installed in the anti-shake axis accommodating groove, and both ends of the nodding axis are arranged in the nodding axis installation grooves of the base.

[0007] In one embodiment, the anti-shake axis accommodating groove is provided at the rear of the prism carrier, and the anti-shake axis accommodating groove includes a nodding axis accommodating groove and an oscillating axis accommodating groove, and the oscillating axis accommodating groove is perpendicular to the nodding axis accommodating groove and is located in the middle of the nodding axis accommodating groove.

[0008] In one embodiment, the prism driving structure includes a prism magnet arranged at the rear end of the prism carrier and two prism coils arranged at positions corresponding to the base. The prism carrier is driven to nod or shake its head by controlling the direction of current in the two prism coils.

[0009] In one embodiment, the nodding axis accommodating groove is arranged below the shaking axis accommodating groove, and a prism adsorption component installation groove is also provided below the nodding axis accommodating groove, and a base adsorption component installation groove is provided at the corresponding position of the base, and adsorption magnets are provided in the prism adsorption component installation groove and the base adsorption component installation groove, or adsorption magnets and adsorption iron sheets are provided in the prism adsorption component installation groove and the base adsorption component installation groove.

[0010] In one embodiment, the base is provided with a light outlet, a plug-in board mounting groove is provided on the inner side of the light outlet, a plug-in board is installed in the plug-in board mounting groove, an avoidance hole is provided on the plug-in board, and the avoidance holes on different plug-in boards have different sizes. The size of the light outlet of the base can be adjusted by replacing the plug-in board.

[0011] In one embodiment, support platforms are provided on both sides of the bottom of the base, and the upper surface of the support platform is provided with the nodding shaft mounting groove, and or

[0012] The cross-section of the nodding shaft installation groove and / or the shaking shaft accommodating groove is configured as a V-shaped groove.

[0013] In one embodiment, damping glue installation grooves are provided on both end surfaces of the zoom carrier, and damping glue is provided in the damping glue installation grooves.

[0014] In one embodiment, the zoom drive mechanism includes a zoom magnet arranged on at least one side surface of the zoom carrier and a zoom coil arranged on the base, and the zoom magnet and the zoom coil cooperate to drive the zoom carrier to move along the optical axis direction of the zoom lens.

[0015] In one embodiment, the bottom end of the zoom carrier is provided with a groove and a second adsorption magnet is installed, and an iron sheet or a magnet is provided at the bottom end of the base to generate adsorption force with the second adsorption magnet; or

[0016] The bottom end of the zoom carrier is provided with a groove and an iron sheet is installed thereon, and the bottom end of the base is provided with a second adsorption magnet to generate adsorption force with the iron sheet.

[0017] In one embodiment, ball grooves are respectively provided on both sides of the bottom end of the zoom carrier and the bottom inner wall of the base, and balls are installed in the ball grooves, so that rolling support is provided to the zoom carrier through the balls.

[0018] An anti-shake shaft is arranged between the prism carrier and the rear end of the base of the utility model, and the prism carrier performs nodding and shaking movements with the anti-shake shaft as a fulcrum, so that the movement of the prism carrier is lighter and the activity resistance of the prism carrier is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional exploded view of a lens driving device according to an embodiment of the utility model.

[0020] Figure 2 It is a three-dimensional diagram of a lens driving device according to an embodiment of the utility model.

[0021] Figure 3 It is a three-dimensional diagram of some components of a lens driving device according to an embodiment of the utility model.

[0022] Figure 4 It is a stereoscopic diagram of a zoom carrier according to an embodiment of the utility model.

[0023] Figure 5 It is a three-dimensional diagram of a prism carrier according to an embodiment of the utility model.

[0024] Figure 6 It is a three-dimensional diagram of a prism carrier according to an embodiment of the utility model.

[0025] Figure 7 It is a stereoscopic diagram of an anti-shake shaft according to an embodiment of the utility model.

[0026] Figure 8 It is another stereoscopic diagram of a prism carrier according to an embodiment of the utility model.

[0027] Fig. 9 This is a front view of a prism carrier according to an embodiment of the utility model.

[0028] Fig.10 It is a three-dimensional exploded view of a zoom carrier and a cover plate of an embodiment of the utility model.

[0029] Fig.11 It is a stereoscopic diagram of a zoom carrier according to an embodiment of the utility model.

[0030] Fig.12 yes Fig.11 A cross-sectional view of a lens driving device. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings to describe the preferred embodiments of the present invention in detail, so as to more clearly understand the purpose, characteristics and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0032] In the following description, certain specific details are set forth for the purpose of illustrating the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0033] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0034] In the following description, in order to clearly demonstrate the structure and working mode of the utility model, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0035] The present application generally relates to a lens driving device, which can be used in terminal products such as mobile phones and tablet computers to cooperate with lenses to realize functions such as taking pictures and recording videos. For the convenience of description, the present application introduces the concept of "optical axis" to indicate the propagation direction of light in an optical element. It is an abstract concept and does not refer to the existence of an axis in a physical sense.

[0036] It should be noted that the features shown in the drawings of the present application may belong to one embodiment or to different embodiments, as long as there is no conflict between these features. In order to save space, the present application may use the same drawing to illustrate different embodiments, that is, the same drawing of the present application may be used to reflect the features in different embodiments.

[0037] Reference Figure 1-Figure 12One embodiment of the present application relates to a lens driving device 100, comprising a base 10, a prism carrier 20, a zoom carrier 30, a prism driving mechanism 40 and a lens driving mechanism 50. The base 10 is provided with a prism carrier accommodating cavity 11 and a zoom carrier accommodating cavity 12 in sequence along the length direction. The prism carrier 20 is used to install a prism A and is arranged in the prism carrier accommodating cavity 11. The zoom carrier 30 is used to install a zoom lens B and is arranged in the zoom carrier accommodating cavity 12. The lens driving mechanism 50 drives the zoom carrier 30 to move along a first direction to realize a zoom function, and the prism driving mechanism 40 drives the prism carrier to move around a second direction and a third direction to realize an optical image stabilization function. The prism can turn the direction of the light passing through, and the prism carrier can move the prism, thereby changing the irradiation direction of the light.

[0038] The first direction is defined here as the direction along the optical axis of the zoom lens, the second direction is the direction perpendicular to the first direction and parallel to the lower surface of the base, and the third direction is the direction perpendicular to the first direction and the second direction, that is, the third direction is the direction of the plumb line when the base is normally placed, that is, a coordinate system is established with the third direction as the Z axis and the first direction as the X axis, and the second direction is the Y axis.

[0039] An anti-shake axis 70 is arranged between the prism carrier 20 and the base 10. The anti-shake axis 70 includes a nodding axis 71 extending along the second direction and a shaking axis 72 extending along the first direction perpendicular to the second direction. The prism carrier 20 is provided with an anti-shake axis accommodating groove 21. The anti-shake axis 70 is installed in the anti-shake axis accommodating groove 21, wherein both ends of the nodding axis 71 are arranged in the nodding axis installation groove 13 of the base.

[0040] Optionally, support platforms 131 are provided at both ends of the bottom of the base, and the nodding shaft mounting groove 13 is provided on the upper surface of the support platform 131 .

[0041] During operation, the prism carrier 20 performs a nodding action with the nodding axis 70 as a fulcrum, and performs a shaking action with the shaking axis 72 as a fulcrum, wherein the nodding action refers to the action of the prism carrier rotating around the second direction, and the shaking action refers to the action of rotating around the first direction. The setting of the anti-shake axis makes the movement of the prism carrier 20 easier, and reduces the movement resistance of the prism carrier.

[0042] In one embodiment, the base 10 is provided with a light outlet 16, a plug-in board mounting groove 161 is provided on the inner side of the light outlet 16, a plug-in board 17 is installed in the plug-in board mounting groove 161, and an avoidance hole 171 is provided on the plug-in board 17. The avoidance holes on different plug-ins have different sizes, so that the size of the light outlet of the base can be adjusted by replacing the plug-in board.

[0043] Reference Figure 8The anti-shake axis accommodating groove 21 includes a nodding axis accommodating groove 211 and an oscillating axis accommodating groove 212 . The oscillating axis accommodating groove 212 is perpendicular to the nodding axis accommodating groove 211 and is located in the middle of the nodding axis accommodating groove 211 .

[0044] In one embodiment, the nodding axis 71 is fixedly connected to the shaking axis 72, and the prism driving structure 40 includes a prism magnet 41 arranged at the rear end of the prism carrier and two prism coils 42 arranged at positions corresponding to the base. The prism carrier is driven to nod or shake its head by controlling the current directions in the two prism coils 42. For example, if the current directions of the two prism coils 42 are the same, such as both are clockwise or both are counterclockwise, the prism carrier can be driven to achieve a nodding action. If the current directions of the two prism coils are different, such as one is clockwise and the other is counterclockwise, the prism carrier can be driven to achieve a shaking action.

[0045] Optionally, in order to reduce the movement friction of the prism carrier, the cross-section of the nodding shaft installation groove 13 can be designed as a V-groove structure, thereby reducing the contact area between the nodding shaft and the inner wall of the nodding shaft installation groove, thereby reducing the friction during its rotation.

[0046] In one embodiment, the nodding axis accommodating groove 212 is arranged below the shaking axis accommodating groove 211, and a prism adsorption component mounting groove 213 is also provided below the nodding axis accommodating groove 211, and a base adsorption component mounting groove 15 is provided at the corresponding position of the base, and adsorption magnets 214 can be provided in both the prism adsorption component mounting groove 213 and the base adsorption component mounting groove 15, or adsorption magnets and adsorption iron sheets can be provided in the prism adsorption component mounting groove 213 and the base adsorption component mounting groove 15 respectively.

[0047] In one embodiment, the first driving mechanism 40 includes a zoom magnet 41 disposed on at least one side surface of the zoom carrier 30 and a zoom coil 42 disposed on the base. The zoom magnet 41 and the zoom coil 42 cooperate to drive the zoom carrier 30 to move along the optical axis direction of the zoom lens.

[0048] Reference Fig.11In one embodiment, ball grooves 31 are respectively provided on both sides of the bottom end of the zoom carrier 30 and the bottom inner wall of the base, and balls 311 are installed in the ball grooves 31, and rolling support is provided to the zoom carrier 30 through the balls 311. Optionally, a lens adsorption magnet installation groove 32 is also provided on the inner side of the zoom carrier 30, and a lens adsorption magnet 321 is provided in the lens adsorption magnet installation groove 32. An adsorption force is generated between the lens adsorption magnet 321 and the built-in metal provided on the base 10, so that the structure between the lens carrier and the base is more compact, and the ball is prevented from falling out of the groove. It can be understood by those skilled in the art that in other embodiments, the bottom end of the zoom carrier may be provided with a groove and an iron sheet is installed, and an adsorption magnet is provided at a corresponding position of the bottom end of the base to generate an adsorption force with the iron sheet, and the adsorption force makes the structure between the zoom carrier and the base more compact, and the ball is prevented from falling out of the groove.

[0049] In one embodiment, a cover plate 70 is detachably connected to the top of the zoom carrier 30 to fix the zoom lens, thereby improving the structural stability between the zoom lens and the zoom carrier.

[0050] In one embodiment, damping glue installation grooves 33 are provided at both end surfaces of the zoom carrier 30 , and damping glue 331 is provided in the damping glue installation grooves 33 to buffer the collision between the zoom carrier 30 and the inner wall of the base.

[0051] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A lens driving device, characterized in that: The lens driving device comprises a base, a prism carrier, a zoom carrier, a prism driving mechanism and a zoom driving mechanism. The base is provided with a prism carrier accommodating cavity and a zoom carrier accommodating cavity in sequence along the length direction. The prism carrier is used to install a prism and is arranged in the prism carrier accommodating cavity. The zoom carrier is used to install a zoom lens and is arranged in the zoom carrier accommodating cavity. The zoom driving mechanism drives the zoom carrier to move along a first direction, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction. An anti-shake axis is arranged between the prism carrier and the base, and the anti-shake axis includes a nodding axis extending along the second direction and a shaking axis extending along the first direction, wherein the prism carrier is provided with an anti-shake axis accommodating groove, the anti-shake axis is installed in the anti-shake axis accommodating groove, and both ends of the nodding axis are arranged in the nodding axis installation grooves of the base.

2. The lens driving device according to claim 1, characterized in that: The anti-shake axis accommodating groove is provided at the rear of the prism carrier, and the anti-shake axis accommodating groove includes a nodding axis accommodating groove and an oscillating axis accommodating groove, and the oscillating axis accommodating groove is perpendicular to the nodding axis accommodating groove and is located in the middle of the nodding axis accommodating groove.

3. The lens driving device according to claim 1, characterized in that: The prism driving structure includes a prism magnet arranged at the rear end of the prism carrier and two prism coils arranged at positions corresponding to the base. The prism carrier is driven to nod or shake its head by controlling the direction of current in the two prism coils.

4. The lens driving device according to claim 2, characterized in that: The nodding axis accommodating groove is arranged below the shaking axis accommodating groove, and a prism adsorption component installation groove is also provided below the nodding axis accommodating groove, and a base adsorption component installation groove is provided at the corresponding position of the base, and adsorption magnets are provided in the prism adsorption component installation groove and the base adsorption component installation groove, or adsorption magnets and adsorption iron sheets are provided in the prism adsorption component installation groove and the base adsorption component installation groove.

5. The lens driving device according to claim 1, characterized in that: The base is provided with a light outlet, a plugboard installation groove is provided inside the light outlet, a plugboard is installed in the plugboard installation groove, an avoidance hole is provided on the plugboard, and the avoidance holes on different plugboards have different sizes. The size of the light outlet of the base can be adjusted by replacing the plugboard.

6. The lens driving device according to claim 2, characterized in that: Support platforms are provided on both sides of the bottom of the base, and the upper surface of the support platform is provided with the nodding shaft installation groove, and or The cross-section of the nodding shaft installation groove and / or the shaking shaft accommodating groove is configured as a V-shaped groove.

7. The lens driving device according to claim 1, characterized in that: Damping glue installation grooves are arranged on both end surfaces of the zoom carrier, and damping glue is arranged in the damping glue installation grooves.

8. The lens driving device according to claim 1, characterized in that: The zoom driving mechanism includes a zoom magnet disposed on at least one side surface of the zoom carrier and a zoom coil disposed on the base. The zoom magnet cooperates with the zoom coil to drive the zoom carrier to move along the optical axis direction of the zoom lens.

9. The lens driving device according to claim 1, characterized in that: The bottom end of the zoom carrier is provided with a groove and a second adsorption magnet is installed thereon, and an iron sheet or a magnet is provided at the bottom end of the base to generate adsorption force with the second adsorption magnet; or The bottom end of the zoom carrier is provided with a groove and an iron sheet is installed thereon, and the bottom end of the base is provided with a second adsorption magnet to generate adsorption force with the iron sheet.

10. The lens driving device according to claim 1, characterized in that: Ball grooves are respectively arranged on both sides of the bottom end of the zoom carrier and the inner wall of the bottom of the base. Balls are installed in the ball grooves, and rolling support is provided to the zoom carrier through the balls.

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