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 shell, a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism. The prism carrier, the lens carrier, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity; the shell is provided with a downward recess, the top end of the prism carrier is provided with an upward protrusion, and after the shell is detachably connected with the base, the recess is located on the side edge of the protrusion to form a limiting structure between the shell and the base. According to the utility model, through the cooperation of the recess and the projection, the prism carrier can only be limited to shake in a small range, and the collision contact between the prism carrier and the housing can only be limited between the recess and the projection, thereby finally achieving the purpose that the contact surface and the transmission point of the collision force are controllable.

Description

Technical Field

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

[0002] With the development of technology, many current electronic devices (such as smart phones or digital cameras) have the functions of taking pictures or videos. The use of these electronic devices is becoming more and more common, and they are developing towards a convenient, thin and light design direction to provide users with more choices.

[0003] Among them, the lens driving device is used in a light design because it can greatly reduce the overall thickness and weight of the device. The structure of the lens driving device usually includes two parts, namely the lens part and the prism part, both of which are arranged in a hollow cavity formed by a housing and a base. The prism part is arranged at the rear end, and an imaging chip is arranged at the front end of the lens part. Light is reflected by the prism part to convert the light path to the lens part, and after zooming through the lens part, it reaches the imaging chip.

[0004] Specifically, the prism part can usually nod and shake on the base to change the light angle. When the prism part makes these movements, its top usually does not touch the housing. However, in extreme cases, such as when the terminal equipped with the lens driving device falls from a height or other special scenarios, the prism part may have a large amount of movement, and each adsorption part may become detached. At this time, the top of part of it may touch the housing. The collision point between the prism part and the housing is uncontrollable, and the transmission point of the collision force is also uncontrollable, which will cause the prism part to be unable to return to its original position after the collision, resulting in the problem that the anti-shake operation cannot be performed. Summary of the Utility Model

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

[0006] A lens driving device includes a housing, a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism. The housing is detachably connected to the base and forms a hollow cavity. The prism carrier, the lens carrier, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity;

[0007] A downward depression is arranged on the housing, and an upward protrusion is arranged at the top of the prism carrier. After the housing is detachably connected to the base, the depression is located on the side of the protrusion, forming a limiting structure between the housing and the base.

[0008] Optionally, the two sides of the rear end of the housing respectively have the depressions, the depressions straddle the rear side and the side of the housing, the rear side and the two sides of the top end of the prism carrier respectively have the protrusions, and after the housing is detachably connected to the base, the depressions are located between two adjacent protrusions.

[0009] Optionally, the front side of the depression is an inclined surface, the rear sides of the protrusions located on both sides of the prism carrier are inclined surfaces, and the angles of the inclined surfaces of the depressions are the same as the inclined angles of the inclined surfaces of the protrusions.

[0010] Optionally, the lens carrier and the prism carrier are arranged in the base along a first direction, the zoom driving mechanism drives the lens carrier to move along the 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.

[0011] Optionally, the prism driving mechanism includes a nodding coil arranged at the rear side inside the base, a shaking coil arranged at the bottom end inside the base, a nodding magnet arranged at the rear side of the prism carrier, and a shaking magnet arranged at the bottom end of the prism carrier, the nodding coil and the nodding magnet are oppositely arranged, and the shaking coil and the shaking magnet are oppositely arranged.

[0012] Optionally, there are two nodding coils, and the two nodding coils are arranged at the rear side inside the base along the second direction;

[0013] There are two groups of nodding magnets, the two groups of nodding magnets are arranged at the rear side of the prism carrier along the second direction, and each group of nodding magnets has one or a plurality of nodding magnets arranged side by side.

[0014] Optionally, there are two shaking coils, and the two shaking coils are arranged at the bottom end inside the base along the second direction;

[0015] There are two groups of shaking magnets, the two groups of shaking magnets are arranged at the bottom end of the prism carrier along the second direction, and each group of shaking magnets has one or a plurality of shaking magnets arranged side by side.

[0016] Optionally, a prism carrier built-in metal is arranged inside the prism carrier, the prism carrier built-in metal has a rear side, and the rear side of the prism carrier built-in metal is oppositely arranged and adsorbed to the nodding magnet.

[0017] Optionally, a prism carrier built-in metal is arranged inside the prism carrier, and the bottom end of the prism carrier built-in metal is oppositely arranged and adsorbed to the shaking magnet.

[0018] Optionally, a bottom adsorption iron sheet is arranged inside the base, the bottom adsorption iron sheet is located below the shaking coil, and the bottom adsorption iron sheet and the shaking magnet are arranged opposite to each other and adsorb each other.

[0019] Optionally, the zoom driving mechanism includes a zoom coil arranged on the inner side wall of the base and a zoom magnet arranged on the side wall of the lens carrier, and the zoom coil and the zoom magnet are arranged opposite to each other.

[0020] Optionally, a cover plate for fixing the lens is detachably arranged at the top end of the lens carrier.

[0021] Optionally, anti-collision parts are respectively arranged at the front and rear ends of the lens carrier.

[0022] Optionally, a lens ball groove is arranged between the bottom end of the lens carrier and the inner bottom end of the base, and a lens ball is connected in the lens ball groove in a rolling manner.

[0023] Optionally, a lens carrier adsorption magnet is arranged at the bottom end of the lens carrier, a base built-in metal is arranged inside the base, and the base built-in metal and the lens carrier adsorption magnet are arranged opposite to each other and adsorb each other;

[0024] A lens carrier built-in metal is arranged inside the lens carrier, and the bottom end of the lens carrier built-in metal and the lens carrier adsorption magnet are arranged opposite to each other and adsorb each other.

[0025] Optionally, a lens carrier built-in metal is arranged inside the lens carrier, the lens carrier built-in metal has a side surface, and the side surface of the lens carrier built-in metal and the zoom magnet are arranged opposite to each other and adsorb each other.

[0026] Optionally, the prism carrier includes a first prism carrier and a second prism carrier arranged at the lower end of the first prism carrier. A shaking ball is arranged at the bottom end of the second prism carrier, the shaking ball abuts against the inner bottom end of the base, the second prism carrier moves around the first direction with the shaking ball as a fulcrum, a nodding ball is arranged at the top end of the second prism carrier, the nodding ball abuts against the bottom end of the first prism carrier, and the first prism carrier moves around the second direction with the nodding ball as a fulcrum.

[0027] Optionally, a shaking ball groove is arranged between the bottom end of the second prism carrier and the base, and a movable ball is connected in the shaking ball groove in a rolling manner.

[0028] Optionally, three shaking ball grooves are arranged between the bottom end of the second prism carrier and the base, the three shaking ball grooves are distributed in a triangular shape along the first direction, the shaking ball is fixed in the shaking ball groove in the middle, and the movable balls are connected in the shaking ball grooves on both sides in a rolling manner.

[0029] Optionally, a support groove is provided at the bottom end of the first prism carrier, a support protrusion is provided on the second prism carrier, a nodding ball is provided at the top end of the support protrusion, the support protrusion is matched with the support groove, and the nodding ball abuts against the top wall of the support groove.

[0030] Optionally, two nodding balls are provided along the second direction at the top end of the second prism carrier.

[0031] Optionally, a built-in metal in the first prism carrier is provided in the first prism carrier, and a first prism carrier adsorption metal is provided at the bottom end of the middle part of the built-in metal in the first prism carrier;

[0032] A built-in metal in the second prism carrier is provided in the second prism carrier, and an adsorption magnet mounting part is provided at the top end of the middle part of the built-in metal in the second prism carrier;

[0033] A first prism carrier adsorption magnet is provided on the second prism carrier, and the first prism carrier adsorption magnet is respectively arranged opposite to and adsorbed with the first prism carrier adsorption metal, and is arranged opposite to and adsorbed with the adsorption magnet mounting part.

[0034] Beneficial effects: The present utility model has at least one or more of the following advantages: Through the cooperation of the recess and the protrusion, the prism carrier can only be restricted to shake within a small range, and the collision contact between the prism carrier and the outer shell can only be restricted between the recess and the protrusion, finally achieving the purpose of controlling the contact surface and the transmission point of the collision force. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic structural diagram of the present utility model;

[0036] Figure 2 is Figure 1 the A-A cross-sectional view of

[0037] Figure 3 is Figure 1 the exploded view of

[0038] Figure 4 is Figure 3 the further exploded view of

[0039] Figure 5 is a schematic structural diagram of the base of the present utility model;

[0040] Figure 6 is a schematic structural diagram of the prism carrier of the present utility model;

[0041] Figure 7 is Figure 6 the exploded view of

[0042] Figure 8 Another perspective schematic diagram of Figure 7 ;

[0043] Figure 9 A schematic structural diagram of the lens carrier of the present utility model;

[0044] Figure 10 An exploded view of the positional relationship among the coils, magnets, built-in metals, adsorption magnets, and adsorption iron sheets of the present utility model;

[0045] Figure 11 Another perspective schematic diagram of Figure 10 ; Specific embodiments

[0046] The following will describe in detail the preferred embodiments of the present utility model with reference to the accompanying drawings to more clearly understand the purpose, features, and advantages of the present utility model. It should be understood that the embodiments shown in the drawings are not limitations on the scope of the present utility model, but only illustrate the essential spirit of the technical solution of the present utility model.

[0047] In the following description, for the purpose of illustrating various disclosed embodiments, certain specific details are set forth to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments can be practiced without one or more of these specific details. In other instances, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail so as not to unnecessarily obscure the description of the embodiments.

[0048] References to "one embodiment" or "an embodiment" throughout the specification mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of "in one embodiment" or "in an embodiment" throughout the specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0049] In the following description, in order to clearly show the structure and working mode of the present utility model, many directional terms will be used for description. However, words such as "front", "rear", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as limiting terms.

[0050] In the following description, the first direction is defined as the direction along the optical axis of the 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 and second directions, that is, the third direction is the direction of the plumb line when the base is placed normally. That is to say, a coordinate system is established with the third direction as the Z-axis and the first direction as the X-axis, then the second direction is the Y-axis.

[0051] Referring to Figures 1 to 4 , this embodiment provides a lens driving device, which includes a base 10, a prism carrier, a lens carrier 60, a prism driving mechanism and a zoom driving mechanism.

[0052] The lens driving device further includes a housing 70, which is detachably connected to the base 10 and forms a hollow cavity. The prism carrier, the lens carrier 60, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity.

[0053] Referring to Figure 1 and Figure 3 , a downward depression 71 is provided on the housing 70, and this depression 71 is equivalent to an upward protrusion relative to the top surface inside the housing 70.

[0054] Referring to Figure 3 and Figure 7 , an upward protrusion 24 is provided at the top end of the first prism carrier 20.

[0055] After the housing 70 is detachably connected to the base 10, the depression 71 is located at the side of the protrusion 24, and there is a preset small gap between the two, and the two cooperate with each other to form a limiting structure between the housing 70 and the base 10. Among them, the gap between the two can be determined according to the actual anti-shake floating requirements of the prism carrier, so as not to interfere with the normal nodding and shaking actions of the prism carrier.

[0056] Generally, when the prism carrier performs nodding and shaking actions, the top end of the first prism carrier 20 will not touch the housing 70. However, in extreme cases, such as when the terminal equipped with the lens driving device falls from a height and other special scenarios, the prism carrier may have a large amount of movement, and each adsorption part may become detached. At this time, the top end of the first prism carrier 20 may touch the housing 70.

[0057] If the above-mentioned depression 71 and protrusion 24 are not designed, the first prism carrier 20 may collide with the housing 70 at the front end, the rear end, or the side. This kind of collision is uncontrollable, and the transmission point of the collision force is also uncontrollable, which will cause the prism carrier to not return to its original position after the collision, resulting in the problem that the anti-shake operation cannot be performed.

[0058] Through the cooperation of the above-mentioned recess 71 and protrusion 24, the first prism carrier 20 can only be restricted from shaking within a small range, and the collision contact between the prism carrier and the housing 70 can only be restricted between the recess 71 and the protrusion 24, ultimately achieving the purpose of controllable contact surfaces and collision force transfer points.

[0059] In one embodiment, referring to Figure 1 and Figure 3 , both sides of the rear end of the housing 70 are respectively provided with recesses 71, and the recesses 71 straddle the rear side and the side of the housing 70. The rear side and both sides of the top end of the prism carrier are respectively provided with protrusions 24. After the housing 70 is detachably connected to the base 10, each recess 71 is respectively located between two adjacent protrusions 24.

[0060] In one embodiment, referring to Figure 3 , the front side surface of the recess 71 is an inclined surface 71a. Referring to Figure 7 , the rear side surfaces of the protrusions 24 located on both sides of the prism carrier are inclined surfaces 24a, and the angle of the inclined surface 71a of the recess 71 is the same as the inclination angle of the inclined surface 24a of the protrusion 24.

[0061] In one embodiment, the prism carrier and the lens carrier 60 are arranged in the base 10 along a first direction. Specifically, a prism carrier accommodation cavity and a lens carrier accommodation cavity can be arranged in the base 10 along the first direction. The prism carrier is used to mount the prism 91 and is arranged in the prism carrier accommodation cavity, and the lens carrier 60 is used to mount the lens 92 and is arranged in the lens carrier accommodation cavity. Among them, the prism 91 is mounted on the first prism carrier 20.

[0062] The zoom driving mechanism drives the lens carrier 60 to move along the first direction to achieve the zoom function, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction to achieve the optical image stabilization function. The prism carrier drives the prism to nod and shake its head. The prism can deflect the direction of the passing light, and the prism carrier can move the prism, thereby changing the irradiation direction of the light. Among them, the nodding action refers to the action of the prism carrier rotating around the second direction, and the shaking head action refers to the action of rotating around the first direction.

[0063] In one embodiment, the prism carrier includes a first prism carrier 20 and a second prism carrier 30, and the second prism carrier 30 is arranged at the lower end of the first prism carrier 20.

[0064] Referring to Figure 6 and Figure 8 , a shaking head ball 41 is arranged at the bottom end of the second prism carrier 30, and the shaking head ball 41 abuts against the inner bottom end of the base 10. The second prism carrier 30 rotates around the first direction with the shaking head ball 41 as a fulcrum. Referring to Figure 7, a nodding ball 42 is provided at the top end of the second prism carrier 30, and the nodding ball 42 abuts against the bottom end of the first prism carrier 20. The first prism carrier 20 moves around the second direction with the nodding ball 42 as a fulcrum.

[0065] In this embodiment, the shaking ball 41 and the nodding ball 42 provide a rolling support function, making the nodding and shaking actions light and smooth, reducing the movement resistance of the prism carrier, and enabling the prism carrier to achieve stable nodding and shaking actions.

[0066] In one embodiment, referring to Figure 5 and Figure 6 , shaking ball grooves are respectively provided at the bottom end of the second prism carrier 30 and the inner bottom end of the base 10, and movable balls 43 are rollingly connected in the shaking ball grooves.

[0067] The movable balls 43 are not fixedly connected to the base 10 or the second prism carrier 30 and can move and roll in the shaking ball grooves. When the second prism carrier 30 performs a shaking action, the movable balls 43 roll in the shaking ball grooves.

[0068] In one embodiment, referring to Figure 5 and Figure 6 , three shaking ball grooves are respectively provided at the bottom end of the second prism carrier 30 and the inner bottom end of the base 10. The three shaking ball grooves are distributed in a triangular pattern along the first direction. A shaking ball 41 is fixed in the shaking ball groove at the front end of the middle, and movable balls 43 are rollingly connected in the shaking ball grooves at both sides of the rear end.

[0069] Among them, the shaking ball 41 is fixed in the shaking ball groove at the bottom end of the second prism carrier 30, and the bottom end of the shaking ball 41 abuts against (contacts) the shaking ball groove at the inner bottom end of the base 10.

[0070] In one embodiment, referring to Figure 7 and Figure 8 , a support groove 21 is provided at the bottom end of the first prism carrier 20, a support protrusion 31 is provided on the second prism carrier 30, a nodding ball 42 is provided at the top end of the support protrusion 31, the support protrusion 31 is inserted into the support groove 21, and the nodding ball 42 abuts against the top groove wall of the support groove 21.

[0071] In one embodiment, referring to Figure 7 , two nodding balls 42 are provided along the second direction at the top end of the second prism carrier 30.

[0072] Specifically, the two nodding balls 42 are preferably located on the left and right sides at the top end of the second prism carrier 30.

[0073] In one embodiment, referring to Figure 5 、 Figure 6 and Figure 8, the prism driving mechanism includes a nodding coil 51 disposed at the rear side inside the base 10, a shaking coil 52 disposed at the bottom end inside the base 10, a nodding magnet 53 disposed in a nodding magnet mounting groove 25 at the rear side of the first prism carrier 20, and a shaking magnet 54 disposed at the bottom end of the second prism carrier 30. The nodding coil 51 and the nodding magnet 53 are oppositely disposed and drive the first prism carrier 20 to perform a nodding action under the cooperation of the two. The shaking coil 52 and the shaking magnet 54 are oppositely disposed and drive the second prism carrier 30 and the first prism carrier 20 to perform a shaking action under the cooperation of the two.

[0074] Among them, both the nodding coil 51 and the shaking coil 52 are powered by an in-base built-in circuit inside the base 10.

[0075] In one embodiment, referring to Figure 5 , there are two nodding coils 51, and the two nodding coils 51 are disposed along the second direction at the rear side inside the base 10.

[0076] Referring to Figure 6 , there are two sets of nodding magnets 53, and the two sets of nodding magnets 53 are disposed along the second direction at the rear side of the first prism carrier 20. Each set of nodding magnets 53 has one or several nodding magnets 53 arranged side by side.

[0077] When each set has several nodding magnets 53, the several nodding magnets 53 can be arranged side by side along the second direction, or can be arranged side by side along the third direction as shown in Figure 6 .

[0078] In one embodiment, referring to Figure 5 , there are two shaking coils 52, and the two shaking coils 52 are disposed along the second direction at the bottom end inside the base 10.

[0079] Referring to Figure 6 and Figure 8 , there are two sets of shaking magnets 54, and the two sets of shaking magnets 54 are disposed along the second direction at the bottom end of the second prism carrier 30. Each set of shaking magnets 54 has one or several shaking magnets 54 arranged side by side.

[0080] When each set has several shaking magnets 54, the several shaking magnets 54 can be arranged side by side along the second direction, or can be arranged side by side along the first direction as shown in Figure 6 .

[0081] In one embodiment, referring to Figure 10 and Figure 11 , a first prism carrier built-in metal 22 is disposed inside the first prism carrier 20. The first prism carrier built-in metal 22 has a rear side surface, and the rear side surface of the first prism carrier built-in metal 22 is oppositely disposed and adsorbed to the nodding magnet 53 to improve the connection stability of the nodding magnet 53.

[0082] In one embodiment, referring to Figure 10 and Figure 11 , a first prism carrier 20 is provided with a built-in metal 22 inside the first prism carrier. At the bottom end of the middle part of the built-in metal 22 in the first prism carrier, a first prism carrier adsorption metal 23 is provided.

[0083] A second prism carrier 30 is provided with a built-in metal 32 inside the second prism carrier. At the top end of the middle part of the built-in metal 32 in the second prism carrier, an adsorption magnet mounting part 33 is provided.

[0084] A first prism carrier adsorption magnet 34 is provided on the second prism carrier 30. The first prism carrier adsorption magnet 34 is arranged opposite to the first prism carrier adsorption metal 23 and adsorbs each other. The first prism carrier adsorption magnet 34 is arranged opposite to the adsorption magnet mounting part 33 and adsorbs each other to improve the connection stability between the first prism carrier 20 and the second prism carrier 30.

[0085] In one embodiment, referring to Figure 10 and Figure 11 , a second prism carrier 30 is provided with a built-in metal 32 inside the second prism carrier. The bottom end of the built-in metal 32 in the second prism carrier is arranged opposite to the shaking magnet 54 and adsorbs each other to improve the connection stability of the shaking magnet 54.

[0086] In one embodiment, a bottom adsorption iron sheet is provided inside the base 10. The bottom adsorption iron sheet is located below the shaking coil 52. The bottom adsorption iron sheet is arranged opposite to the shaking magnet 54 and adsorbs each other to improve the connection stability between the second prism carrier 30 and the base 10.

[0087] In one embodiment, referring to Figure 4 and Figure 10 , the zoom driving mechanism includes a zoom coil 55 provided on the inner side wall of the base 10 and a zoom magnet 56 provided on the side wall of the lens carrier 60. The zoom coil 55 is arranged opposite to the zoom magnet 56, and the two cooperate to generate a driving force to make the lens carrier 60 perform a zoom movement action.

[0088] Among them, the zoom coil 55 is powered by a built-in circuit in the base 10.

[0089] In one embodiment, referring to Figure 3 , Figure 4 and Figure 9 , a cover plate 61 is detachably provided at the top end of the lens carrier 60. The cover plate 61 is used to fix the lens 92.

[0090] In one embodiment, referring to Figure 4 and Figure 9, anti-collision parts 62 are respectively arranged at the front and rear ends of the lens carrier 60 to avoid collision between the lens carrier 60 and the base 10 or the rear side of the lens carrier 60.

[0091] The anti-collision part 62 is made of an elastic material, such as a buffer material like rubber, plastic or silica gel. Preferably, the anti-collision part 62 is an anti-collision soft rubber made of soft rubber.

[0092] In one embodiment, referring to Figure 5 and Figure 9 , a lens ball groove is arranged between the bottom end of the lens carrier 60 and the inner bottom end of the base 10, and a lens ball 44 is rollingly connected in the lens ball groove to reduce the friction force when the lens carrier 60 moves.

[0093] Specifically, longer lens ball grooves 66 can be respectively arranged on the left and right sides of the bottom end of the lens carrier 60, a shorter lens ball groove is arranged on one side of the inner bottom end of the base 10 and a lens ball 44 is arranged, and two shorter lens ball grooves are arranged on the other side of the inner bottom end of the base 10 and lens balls 44 are respectively arranged. The length direction of the lens ball grooves is the first direction, and each lens ball 44 can freely roll in the upper and lower two lens ball grooves.

[0094] In one embodiment, referring to Figure 10 and Figure 11 , a lens carrier adsorption magnet 63 is arranged at the bottom end of the lens carrier 60, a base built-in metal is arranged in the base 10, and the base built-in metal and the lens carrier adsorption magnet 63 are arranged opposite to each other and adsorb each other. A lens carrier built-in metal 64 is arranged in the lens carrier 60, and the bottom end of the lens carrier built-in metal 64 is arranged opposite to the lens carrier adsorption magnet 63 and adsorb each other, making the structure between the lens carrier 60 and the base 10 more stable.

[0095] Specifically, referring to Figure 9 , an adsorption magnet installation groove 65 can be arranged at the bottom end of the lens carrier 60, and the lens carrier adsorption magnet 63 is installed in the adsorption magnet installation groove 65.

[0096] In one embodiment, referring to Figure 10 and Figure 11 , a lens carrier built-in metal 64 is arranged in the lens carrier 60. The lens carrier built-in metal 64 has a side surface, and the side surface of the lens carrier built-in metal 64 is arranged opposite to the zoom magnet 56 and adsorb each other to improve the connection stability of the zoom magnet 56.

[0097] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that after reading the above teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A lens driving device, comprising a housing, a base, a prism carrier, a lens carrier, a prism driving mechanism and a zoom driving mechanism, wherein the housing and the base are detachably connected and form a hollow cavity, and the prism carrier, the lens carrier, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity; It is characterized in that The shell is provided with a downward depression, and the top of the prism carrier is provided with an upward protrusion. After the shell and the base are detachably connected, the depression is located on the side of the protrusion to form a limiting structure between the shell and the base.

2. The lens driving device according to claim 1, wherein: The shell has recesses on both sides of the rear end, and the recesses are arranged across the rear side and the side of the shell. The top rear side and both sides of the prism carrier have protrusions. After the shell is detachably connected to the base, the recess is located between two adjacent protrusions.

3. The lens driving device according to claim 2, wherein: The front side surface of the depression is an inclined surface, and the rear side surfaces of the protrusions located on both sides of the prism carrier are inclined surfaces, and the angle of the inclined surface of the depression is consistent with the inclination angle of the inclined surface of the protrusion.

4. The lens driving device according to claim 1, wherein: The lens carrier and the prism carrier are arranged in the base along a first direction, the zoom driving mechanism drives the lens carrier to move along the 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.

5. The lens driving device according to claim 4, characterized in that: The prism driving mechanism includes a nodding coil arranged on the rear side of the base, a shaking head coil arranged on the bottom end of the base, a nodding magnet arranged on the rear side of the prism carrier, and a shaking head magnet arranged on the bottom end of the prism carrier. The nodding coil is arranged opposite to the nodding magnet, and the shaking head coil is arranged opposite to the shaking head magnet.

6. The lens driving device according to claim 5, characterized in that: The prism carrier is provided with a prism carrier built-in metal, the prism carrier built-in metal has a rear side surface, and the rear side surface of the prism carrier built-in metal is arranged opposite to the nodding magnet and is mutually attracted; And / or, a prism carrier built-in metal is arranged in the prism carrier, and the bottom end of the prism carrier built-in metal is arranged opposite to the shaking head magnet and is attracted to each other; And / or, a bottom adsorption iron sheet is arranged in the base, the bottom adsorption iron sheet is located below the shaking head coil, and the bottom adsorption iron sheet and the shaking head magnet are arranged opposite to each other and adsorbed to each other.

7. The lens driving device according to claim 4, characterized in that: The zoom driving mechanism comprises a zoom coil arranged on the inner side wall of the base and a zoom magnet arranged on the side wall of the lens carrier, and the zoom coil and the zoom magnet are arranged opposite to each other.

8. The lens driving device according to claim 1, wherein: A cover plate for fixing the lens is detachably provided on the top of the lens carrier; And / or, anti-collision parts are respectively provided at the front and rear ends of the lens carrier.

9. The lens driving device according to claim 4, characterized in that: A lens ball groove is provided between the bottom end of the lens carrier and the inner bottom end of the base, and a lens ball is routable connected in the lens ball groove; And / or, a lens carrier adsorption magnet is arranged at the bottom end of the lens carrier, a base built-in metal is arranged in the base, the base built-in metal and the lens carrier adsorption magnet are arranged opposite to each other and adsorbed to each other; a lens carrier built-in metal is arranged in the lens carrier, and the bottom end of the lens carrier built-in metal and the lens carrier adsorption magnet are arranged opposite to each other and adsorbed to each other.

10. The lens driving device according to claim 7, wherein: A lens carrier built-in metal is arranged in the lens carrier, and the lens carrier built-in metal has a side surface. The side surface of the lens carrier built-in metal is arranged opposite to the zoom magnet and is attracted to each other.

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