Lens driving device

Abstract

The utility model belongs to the technical field of optical imaging equipment, and particularly relates to a lens driving device, which comprises a base, a prism carrier, a zoom carrier, a prism driving mechanism and a zoom driving mechanism, the prism driving mechanism comprises two groups of prism magnets and two prism coils, each group of prism magnets comprises one prism magnet, the two groups of prism magnets are arranged at the rear end of the prism carrier along the second direction, and the two prism coils are arranged on the base along the second direction; a prism adsorption magnet is arranged at the bottom end of the prism carrier, and two base adsorption magnets are arranged at the inner bottom end of the base and are arranged side by side in the second direction. According to the utility model, through the reasonable design of the prism magnet and the prism coil, the prism carrier realizes stable nodding action and head shaking action. And the prism adsorption magnet and the base adsorption magnet are reasonably matched to generate adsorption force therebetween, so that the structural compactness between the base and the prism carrier can be improved.

Description

Technical Field

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

[0002] With the development of technology, many electronic devices (such as smart phones or digital cameras) now have the function of taking photos or recording videos. These electronic devices are becoming more and more popular and are developing in the direction of convenient and lightweight designs to provide users with more choices.

[0003] Among them, the lens driving device is used in lightweight design because it can greatly reduce the thickness and weight of the entire device. The structure of the lens driving device usually includes two parts, namely the lens part and the prism part, wherein the prism part is arranged at the front end, and the imaging chip is arranged at the rear end of the lens part. The light is reflected by the prism part to convert the light path to the lens part, and then zoomed by the lens part to the imaging chip.

[0004] Specifically, the prism part can usually nod and shake its head on the base to change the angle of light. These actions require the prism magnet and the prism coil that cooperates with it to be realized. How to reasonably arrange the prism magnet and keep the prism part stable during movement is a problem that needs to be solved at present. Utility Model Content

[0005] The utility model aims to provide a lens driving device in view of the above technical problems.

[0006] A lens driving device comprises a base, a prism carrier, a zoom carrier, a prism driving mechanism and a zoom driving mechanism, wherein the zoom carrier and the prism carrier are arranged in the base along a first direction;

[0007] 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;

[0008] The prism driving mechanism includes a prism magnet and a prism coil. The prism magnets are in two groups, each group of the prism magnets has a prism magnet, and the two groups of the prism magnets are arranged at the rear end of the prism carrier along the second direction. The prism coils are in two groups, and the two prism coils are arranged at positions corresponding to the base along the second direction.

[0009] A prism adsorption magnet is arranged at the bottom end of the prism carrier, and two base adsorption magnets are arranged at corresponding positions of the bottom end of the base, and the two base adsorption magnets are arranged side by side along the second direction.

[0010] Optionally, anti-collision protrusions are provided on the periphery of the prism carrier.

[0011] Optionally, the anti-collision protrusions include one or more rear anti-collision protrusions located on the rear side of the prism carrier, one or more front anti-collision protrusions located on the front side of the prism carrier, one or more side anti-collision protrusions located on the left and right sides of the prism carrier, one or more top surface anti-collision protrusions located on the top surface of the prism carrier, and one or more bottom anti-collision protrusions located at the bottom of the prism carrier.

[0012] Optionally, the prism carrier has a prism cavity for accommodating a prism, the bottom surface of the prism cavity is an inclined surface, one or more glue grooves are provided on the inclined surface, and the prism is bonded to the prism after glue is dispensed in the glue groove.

[0013] Optionally, two prism magnet mounting grooves are arranged side by side along the second direction at the rear end of the prism carrier, and the prism magnets are respectively arranged in the two prism magnet mounting grooves.

[0014] Optionally, a prism adsorption magnet installation groove is provided at the bottom end of the prism carrier, and the prism adsorption magnet is provided in the prism adsorption magnet installation groove;

[0015] Two base adsorption magnet installation grooves are arranged side by side along the second direction at the inner bottom end of the base, and the base adsorption magnets are respectively arranged in the two base adsorption magnet installation grooves.

[0016] Optionally, a drag reduction shaft is provided between the prism carrier and the base, the prism carrier is provided with a drag reduction shaft accommodating groove, and the drag reduction shaft is installed in the drag reduction shaft accommodating groove;

[0017] The drag reduction shaft includes a nodding shaft extending along the second direction and a shaking shaft extending along the first direction. Both ends of the nodding shaft are arranged on support platforms on both sides of the base, and the prism adsorption magnet is located below the nodding shaft.

[0018] Optionally, the bottom end of the prism carrier is provided with the drag reduction shaft accommodating groove, and the drag reduction shaft accommodating groove includes a nodding shaft accommodating groove and a shaking shaft accommodating groove, and the shaking shaft accommodating groove is perpendicular to the nodding shaft accommodating groove and is located above the middle part of the nodding shaft accommodating groove.

[0019] Optionally, one of the glue grooves on the inclined surface is located in the middle, and the glue groove located in the middle is connected to the shaking head shaft accommodating groove.

[0020] Optionally, the base is provided with a light outlet that is connected inside and outside, a plug-in board slot is provided on the inner side of the light outlet, a plug-in board is plugged into the plug-in board slot, 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 is adjusted by replacing the plug-in board.

[0021] Optionally, a base internal circuit is provided in the base, and the base internal circuit is connected to the prism coil.

[0022] Optionally, built-in metal is provided in the base.

[0023] Beneficial effects: The utility model has at least one or more of the following advantages: The utility model enables the prism carrier to achieve stable nodding and shaking movements through the reasonable design of the prism magnet and the prism coil. The reasonable coordination of the prism adsorption magnet and the base adsorption magnet generates an adsorption force between the two, which does not affect the nodding and shaking movements of the prism carrier, and can improve the structural compactness between the base and the prism carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural schematic diagram of the utility model;

[0025] Figure 2 for Figure 1 Exploded diagram of

[0026] Figure 3 A schematic diagram of the structure of the prism carrier part of the utility model;

[0027] Figure 4 for Figure 3 Exploded diagram of

[0028] Figure 5 for Figure 3 Schematic diagram of the rear side;

[0029] Figure 6 for Figure 3 Schematic diagram of the bottom end;

[0030] Figure 7 for Figure 6 Schematic diagram of some structures;

[0031] Figure 8 for Figure 7 Schematic diagram of part of the structure. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In the following description, the first direction is defined as the direction along the optical axis of the zoom lens, the second direction is defined as the direction perpendicular to the first direction and parallel to the lower surface of the base, and the third direction is defined as 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.

[0037] Reference Figure 1 and Figure 2 The embodiment of the utility model provides a lens driving device, which includes a base 10, a prism carrier 20, a zoom carrier, a prism driving mechanism and a zoom driving mechanism.

[0038] A prism carrier accommodating cavity 11 and a zoom carrier accommodating cavity 12 are arranged in the base 10 along a first direction. The prism carrier 20 is used to install the prism A and is arranged in the prism carrier accommodating cavity 11. The zoom carrier is used to install the zoom lens B and is arranged in the zoom carrier accommodating cavity 12.

[0039] The zoom driving mechanism drives the zoom carrier to move along the first direction to realize the zoom function, and the prism driving mechanism drives the prism carrier 20 to move around the first direction and the second direction perpendicular to the first direction to realize the optical image stabilization function. The prism carrier 20 drives the prism A to nod and shake, and the prism A can turn the direction of the light passing through. The prism carrier can move the prism to change the irradiation direction of the light. Among them, the nodding action refers to the action of the prism carrier 20 rotating around the second direction, and the shaking action refers to the action of rotating around the first direction.

[0040] Reference Figure 2 and Figure 5 The prism driving mechanism includes a prism magnet 41 and a prism coil 42. The prism magnet 41 is divided into two groups. Each group of prism magnets 41 has a prism magnet 41. The two groups of prism magnets 41 are arranged at the rear end of the prism carrier 20 along the second direction. There are two prism coils 42. The two prism coils 42 are arranged at corresponding positions of the base 10 along the second direction.

[0041] By cooperating with the prism magnet 41 and the prism coil 42, the prism carrier 20 can be made to nod or shake its head. Specifically, the prism carrier 20 is driven to nod or shake its head by controlling the current direction 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 20 can be driven to nod. If the current directions of the two prism coils 42 are different, such as one is clockwise and the other is counterclockwise, the prism carrier 20 can be driven to shake its head.

[0042] Reference Figure 2 , Figure 4 and Figure 6 A prism adsorption magnet 21 is disposed at the bottom end of the prism carrier 20, and two base adsorption magnets 13 are disposed at the corresponding position of the bottom end of the base 10, and the two base adsorption magnets 13 are arranged side by side along the second direction.

[0043] The reasonable coordination between the prism adsorption magnet 21 and the base adsorption magnet 13 generates an adsorption force between the two, which can improve the structural compactness between the base 10 and the prism carrier 20 without affecting the nodding and shaking movements of the prism carrier 20.

[0044] Those skilled in the art will appreciate that, in other embodiments, a prism adsorption magnet 21 may be disposed at the bottom end of the prism carrier 20, and an adsorption iron sheet may be disposed at a corresponding position of the bottom end inside the base 10 to generate an adsorption force with the prism adsorption magnet 21, or an adsorption iron sheet may be disposed at the bottom end of the prism carrier 20, and an adsorption magnet may be disposed at a corresponding position of the bottom end inside the base 10.

[0045] In one embodiment, anti-collision protrusions are disposed on the periphery of the prism carrier 20 to prevent the prism carrier 20 from colliding with other components when moving.

[0046] In one embodiment, referring to Figures 3 to 5 The anti-collision protrusions include one or more rear anti-collision protrusions 51 located on the rear side of the prism carrier 20, one or more front anti-collision protrusions 52 located on the front side of the prism carrier 20, one or more side anti-collision protrusions 53 located on the left and right sides of the prism carrier 20, one or more top surface anti-collision protrusions 54 located on the top surface of the prism carrier 20, and one or more bottom anti-collision protrusions 55 located on the bottom of the prism carrier 20.

[0047] In one embodiment, referring to Figure 3 The prism carrier 20 has a prism cavity for accommodating the prism. The bottom surface of the prism cavity is an inclined surface 22. One or more glue grooves 23 are provided on the inclined surface 22. The prism is bonded to the prism by dispensing glue in the glue groove 23.

[0048] In one embodiment, referring to Figure 7 and Figure 8 Two prism magnet mounting grooves 24 are arranged side by side along the second direction at the rear end of the prism carrier 20 , and prism magnets 41 are respectively arranged in the two prism magnet mounting grooves 24 .

[0049] In one embodiment, referring to Figure 7 and Figure 8 A prism adsorption magnet mounting groove 25 is provided at the bottom end of the prism carrier 20, and a prism adsorption magnet 21 is provided in the prism adsorption magnet mounting groove 25.

[0050] Reference Figure 2 Two base adsorption magnet installation grooves are arranged side by side at the bottom end of the base 10 along the second direction, and base adsorption magnets 13 are respectively arranged in the two base adsorption magnet installation grooves.

[0051] In one embodiment, referring to Figures 3 to 7 A drag reduction shaft 60 is arranged between the prism carrier 20 and the base 10. The prism carrier 20 is provided with a drag reduction shaft accommodating groove, and the drag reduction shaft 60 is installed in the drag reduction shaft accommodating groove.

[0052] The drag reduction shaft 60 includes a nodding shaft 61 extending along the second direction and a shaking shaft 62 extending along the first direction. Both ends of the nodding shaft 61 are arranged on the support platforms 14 on both sides of the base 10 , and the prism adsorption magnet 21 is located below the nodding shaft 61 .

[0053] The prism carrier 20 performs nodding and shaking movements with the drag reduction shaft 60 as a fulcrum, making the movement of the prism carrier 20 easier and reducing the activity resistance of the prism carrier 20. Specifically, when performing the nodding movement, the prism carrier 20 drives the shaking shaft 62 to perform the nodding movement with the nodding shaft 61 as a fulcrum. When performing the shaking movement, the prism carrier 20 performs the shaking movement with the shaking shaft 62 as a fulcrum.

[0054] Furthermore, due to the reasonable coordination between the prism adsorption magnet 21 and the base adsorption magnet 13, an adsorption force is generated between the two, which improves the structural compactness between the base 10, the drag reduction shaft 60 and the prism carrier 20, so that the nodding shaft 61 and the shaking shaft 62 in the drag reduction shaft 60 can abut against the support platform 14 and the prism carrier 20, achieving the nodding and shaking fulcrum effects.

[0055] In one embodiment, a support groove is provided on the support platform 14, and the end of the nodding shaft 61 abuts against the support groove. Preferably, the top end of the support groove is a V-shaped groove with an open structure.

[0056] In one embodiment, the nodding shaft 61 and the shaking shaft 62 are fixedly connected.

[0057] In one embodiment, referring to Figure 8 A drag reduction shaft accommodating groove is provided at the bottom end of the prism carrier 20, and the drag reduction shaft accommodating groove includes a nodding shaft accommodating groove 26 and a shaking shaft accommodating groove 27. The shaking shaft accommodating groove 27 is perpendicular to the nodding shaft accommodating groove 26, and the shaking shaft accommodating groove 27 is located above the middle part of the nodding shaft accommodating groove 26.

[0058] In one embodiment, a glue groove 23 is located in the middle of the inclined surface 22. The glue groove 23 in the middle is connected to the shaking head shaft receiving groove 27. The connecting opening 28 of the two is as shown in FIG. Figure 3 and Figure 8 shown.

[0059] In one embodiment, referring to Figure 2 The base 10 is provided with a light outlet 15 which is connected inside and outside. A plug-in board slot 16 is provided inside the light outlet 15. The plug-in board slot 16 is plugged into a plug-in board 70. The plug-in board 70 is provided with an avoidance hole 71. The avoidance holes 71 on different plug-in boards 70 have different sizes. The size of the light outlet 15 of the base 10 can be adjusted by replacing the plug-in board 70.

[0060] In one embodiment, a base internal circuit is disposed in the base 10 , and the base internal circuit is connected to the prism coil 42 .

[0061] In one embodiment, the base 10 is provided with built-in metal.

[0062] In one embodiment, referring to Figure 2The zoom driving mechanism includes a zoom magnet arranged on at least one side of the zoom carrier and a zoom coil 31 arranged on the base. The zoom magnet cooperates with the zoom wire 31 to drive the zoom carrier to move along the optical axis direction of the zoom lens.

[0063] 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, comprising a base, a prism carrier, a zoom carrier, a prism driving mechanism and a zoom driving mechanism, characterized in that: The zoom carrier and the prism carrier are arranged in the base along a first direction; 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; The prism driving mechanism includes a prism magnet and a prism coil. The prism magnets are in two groups, each group of the prism magnets has a prism magnet, and the two groups of the prism magnets are arranged at the rear end of the prism carrier along the second direction. The prism coils are in two groups, and the two prism coils are arranged at positions corresponding to the base along the second direction. A prism adsorption magnet is arranged at the bottom end of the prism carrier, and two base adsorption magnets are arranged at corresponding positions of the bottom end of the base, and the two base adsorption magnets are arranged side by side along the second direction.

2. The lens driving device according to claim 1, wherein: The outer periphery of the prism carrier is provided with anti-collision protrusions; The anti-collision protrusions include one or more rear anti-collision protrusions located on the rear side of the prism carrier, one or more front anti-collision protrusions located on the front side of the prism carrier, one or more side anti-collision protrusions located on the left and right sides of the prism carrier, one or more top surface anti-collision protrusions located on the top surface of the prism carrier, and one or more bottom anti-collision protrusions located at the bottom of the prism carrier.

3. The lens driving device according to claim 1, wherein: The prism carrier has a prism cavity for accommodating a prism. The bottom surface of the prism cavity is an inclined surface. One or more glue grooves are arranged on the inclined surface. The prism carrier is bonded to the prism after glue is dispensed in the glue groove.

4. The lens driving device according to claim 1, wherein: The rear end of the prism carrier is provided with two prism magnet installation grooves arranged side by side along the second direction, and the prism magnets are respectively arranged in the two prism magnet installation grooves.

5. The lens driving device according to claim 1, wherein: A prism adsorption magnet installation groove is provided at the bottom end of the prism carrier, and the prism adsorption magnet is provided in the prism adsorption magnet installation groove; Two base adsorption magnet installation grooves are arranged side by side along the second direction at the inner bottom end of the base, and the base adsorption magnets are respectively arranged in the two base adsorption magnet installation grooves.

6. The lens driving device according to claim 1, wherein: The base is provided with a light outlet that is connected inside and outside, a plug-in board slot is provided inside the light outlet, the plug-in board slot is plugged into the plug-in board, and the plug-in board is provided with an avoidance hole. The avoidance holes on different plug-ins have different sizes, and the size of the light outlet of the base can be adjusted by replacing the plug-in board.

7. The lens driving device according to claim 1, wherein: The base is provided with a base built-in circuit, and the base built-in circuit is connected to the prism coil; The base is provided with built-in metal.

8. The lens driving device according to any one of claims 1 to 7, characterized in that: A drag reduction shaft is arranged between the prism carrier and the base, the prism carrier is provided with a drag reduction shaft accommodating groove, and the drag reduction shaft is installed in the drag reduction shaft accommodating groove; The drag reduction shaft includes a nodding shaft extending along the second direction and a shaking shaft extending along the first direction. Both ends of the nodding shaft are arranged on support platforms on both sides of the base, and the prism adsorption magnet is located below the nodding shaft.

9. The lens driving device according to claim 8, wherein: The bottom end of the prism carrier is provided with the drag reduction shaft accommodating groove, and the drag reduction shaft accommodating groove includes a nodding shaft accommodating groove and a shaking shaft accommodating groove. The shaking shaft accommodating groove is perpendicular to the nodding shaft accommodating groove and is located above the middle part of the nodding shaft accommodating groove.

10. The lens driving device according to claim 9, wherein: When the prism carrier has a prism cavity for accommodating a prism, the bottom surface of the prism cavity is an inclined surface, and one or more glue grooves are provided on the inclined surface, One of the glue grooves on the inclined surface is located in the middle, and the glue groove located in the middle is connected to the shaking head shaft accommodating groove.

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