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 lens carrier, a prism driving mechanism and a zoom driving mechanism, the zoom driving mechanism drives the lens carrier to move in the first direction through cooperation of a zoom coil and a zoom magnet, and the prism driving mechanism drives the prism carrier to move in the first direction and a second direction perpendicular to the first direction through cooperation of a nodding coil, a nodding magnet, a head shaking coil and a head shaking magnet. A circuit board is arranged on the outer wall of the base and connected with the zoom coil, the nodding coil and the head shaking coil. The circuit board is arranged on the outer wall of the base to replace a base built-in circuit in a traditional design, power is supplied to all components through the circuit board, power supply layout does not need to be carried out on the base and the interior of the base, and the structural design of the base is greatly simplified.

Description

TECHNICAL FIELD

[0001] The utility model belongs to optical image equipment technical field, concretely relates to a lens drive device. BACKGROUND

[0002] With the development of science and technology, nowadays many electronic devices (for example smart mobile phone or digital camera) all have the function of taking photograph or recording video. The use of these electronic devices is more and more common, and it develops towards the direction of convenient and thin design to provide users with more choices.

[0003] Among them, the lens drive device is used in light design because it can greatly reduce the thickness and weight of the whole device. The lens drive device structure usually includes two parts, namely the lens part and the prism part, wherein the prism part is set at the rear end, and the imaging chip is set at the front end of the lens part. The light is converted to the lens part through the reflection of the prism part, and then zoomed through the lens part to the imaging chip.

[0004] The lens part in the lens drive device usually adopts the cooperation between the zoom coil and the corresponding zoom magnet to generate driving force, so that the lens carrier moves. The cooperation between the nod coil and the corresponding nod magnet drives the prism carrier to nod, and the cooperation between the shaking coil and the corresponding shaking magnet drives the prism carrier to shake. Each coil needs to be powered to realize the corresponding action, so the power supply layout is usually carried out on the base where each coil is arranged. Therefore, a complex built-in circuit of the base is generally used to power each coil, so the structural complexity of the base is increased. UTILITY MODEL CONTENTS

[0005] The utility model is aimed at the above technical problems, and aims at providing a lens drive device.

[0006] A lens drive device, comprising a base, a prism carrier, a lens carrier, a prism drive mechanism and a zoom drive mechanism, the lens carrier and the prism carrier are arranged in the base along a first direction, the zoom drive mechanism drives the lens carrier to move along the first direction by cooperating the zoom coil arranged on the base with the zoom magnet arranged on the lens carrier, and the prism drive mechanism drives the prism carrier to move around the first direction and the second direction perpendicular to the first direction by cooperating the nod coil arranged on the base with the nod magnet arranged on the prism carrier and the shaking coil arranged on the base with the shaking magnet arranged on the prism carrier.

[0007] The base outer wall is provided with a circuit board, and the circuit board is connected with the zoom coil, the nod coil and the shaking coil respectively.

[0008] Optionally, the zoom coil is arranged on the inner wall of the side of the base, the zoom magnet is arranged on the side wall of the lens carrier, the nod coil is arranged on the inner wall of the rear end of the base, the nod magnet is arranged in the nod magnet mounting groove of the rear end of the prism carrier, the pan coil is arranged at the bottom end of the inside of the base, and the pan magnet is arranged in the pan magnet mounting groove of the bottom end of the prism carrier.

[0009] The circuit board is arranged in a U-shaped manner on the outside of the base, the circuit board is connected with the zoom coil and the nod coil respectively, the bottom end of the circuit board is provided with a bottom circuit board, the bottom circuit board is mounted on the bottom of the base, and the bottom circuit board is connected with the pan coil.

[0010] Optionally, the circuit board is an FPC board.

[0011] Optionally, a bottom magnet suction sheet is fixedly mounted at the bottom end of the bottom circuit board, and the bottom magnet suction sheet is arranged opposite to the pan magnet and is attracted to each other.

[0012] Optionally, a lens emitting plate and a lens receiving plate are arranged in the side wall of the base, the lens emitting plate and the lens receiving plate are arranged along a third direction perpendicular to the first direction, the lens emitting plate and the lens receiving plate are wrapped and formed by injection molding and arranged in the side wall of the base, the lens emitting plate is connected with a lens carrier capacitor IC arranged on the circuit board, and the lens carrier capacitor IC and the lens receiving plate are connected with the circuit board for power supply.

[0013] The lens carrier is provided with a lens carrier built-in metal, and the side of the lens carrier built-in metal is provided with a lens carrier metal plate, and the lens carrier metal plate is arranged opposite to the lens emitting plate and the lens receiving plate.

[0014] Optionally, the lens receiving plate is two, and the two lens receiving plates are arranged side by side along the first direction and located below the lens emitting plate.

[0015] Optionally, the bottom end of the lens carrier is provided with a lens carrier suction magnet, the base is provided with a base built-in metal plate, and the base built-in metal plate is arranged opposite to the lens carrier suction magnet and is attracted to each other.

[0016] The bottom end of the lens carrier built-in metal is arranged opposite to the lens carrier suction magnet and is attracted to each other.

[0017] Optionally, the base is provided with a metal plate embedded therein, and a metal protruding structure is arranged on one side of the metal plate close to the lens receiving plate, and the metal protruding structure is embedded in the injection molding structure of the lens emitting plate and the lens receiving plate.

[0018] Optionally, the lens carrier is provided with a metal plate embedded therein, and the metal plate is provided with a side surface opposite to the zoom magnet and magnetically attracted to the zoom magnet.

[0019] Optionally, the top end of the lens carrier is detachably provided with a cover plate for fixing the lens.

[0020] Optionally, a zoom ball groove is arranged between the bottom end of the lens carrier and the bottom end of the base, and a zoom ball is rotatably connected in the zoom ball groove.

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

[0022] Optionally, the bottom end of the base is provided with a nodding receiving plate, and a shaking receiving plate is arranged in the side wall of the base, the shaking receiving plate is wrapped and formed by an injection molding structure and arranged in the side wall of the base, and the nodding receiving plate and the shaking receiving plate are connected to be powered by the circuit board or respectively connected to a prism carrier capacitor IC arranged on the circuit board.

[0023] The prism carrier is provided with a prism carrier embedded metal, the prism carrier embedded metal is provided with a nodding emitting plate at the bottom, and the prism carrier embedded metal is provided with a shaking emitting plate on one side, the nodding emitting plate is arranged opposite to the nodding receiving plate, and the shaking emitting plate is arranged opposite to the shaking receiving plate.

[0024] The top end of the circuit board is provided with an elastic circuit board, the elastic circuit board is connected to the prism carrier capacitor IC arranged on the circuit board, one end of the elastic circuit board is connected to a power connection plate arranged on one side of the top end of the prism carrier embedded metal, the nodding emitting plate and the shaking emitting plate are connected to the circuit board through the prism carrier embedded metal and the elastic circuit board and powered by the circuit board or connected to the prism carrier capacitor IC.

[0025] The nodding receiving plate and the shaking receiving plate are a group of receiving plates, the nodding emitting plate and the shaking emitting plate are a group of emitting plates, and at least one of the group of receiving plates and the group of emitting plates is connected to the prism carrier capacitor IC.

[0026] Optionally, a metal plate is arranged in the base, the metal plate is embedded in the base, and a metal protruding structure is arranged on one side of the metal plate close to the nodding receiving plate, the metal protruding structure is embedded in the injection molding structure of the nodding receiving plate.

[0027] Optionally, the nodding receiving plate is two, and the two nodding receiving plates are arranged side by side along the first direction.

[0028] Optionally, the nodding receiving plate is two, and the two nodding receiving plates are arranged side by side along the first direction.

[0029] Optionally, the prism carrier includes a first prism carrier and a second prism carrier arranged at the lower end of the first prism carrier, the top end of the second prism carrier is provided with a nodding ball, the nodding ball abuts 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.

[0030] The nodding magnet is arranged in the nodding magnet mounting groove at the rear end of the first prism carrier, and the nodding magnet is arranged in the nodding magnet mounting groove at the bottom end of the second prism carrier.

[0031] Optionally, the prism carrier is embedded in the first prism carrier, and the prism carrier is embedded in the first prism carrier.

[0032] Optionally, a nodding ball groove is arranged between the bottom end of the second prism carrier and the base, and a nodding ball is rotatably connected in the nodding ball groove.

[0033] Optionally, the nodding ball groove is a circular arc structure.

[0034] Optionally, the nodding ball groove at the bottom end of the second prism carrier and the bottom end of the base is four, and the four nodding ball grooves are arranged around the second prism carrier and the base.

[0035] Optionally, the bottom end of the first prism carrier is provided with a mounting groove, the second prism carrier is provided with a mounting protrusion, the top end of the mounting protrusion is provided with the nodding ball, the mounting protrusion is matched with the mounting groove, and the nodding ball abuts the top end groove wall of the mounting groove.

[0036] Optionally, two nodding balls are arranged at the top end of the second prism carrier along the second direction.

[0037] Optionally, the nodding coil is one, the nodding magnet is a group, and the group of nodding magnets has one or a plurality of nodding magnets arranged side by side along the third direction perpendicular to the first direction.

[0038] Optionally, the two head-shaking coils are arranged side by side along a second direction.

[0039] The two groups of head-shaking magnets are arranged side by side along a second direction, and each group of head-shaking magnets has one or a plurality of head-shaking magnets arranged side by side along a first direction.

[0040] Optionally, the first prism carrier is provided with a first prism carrier built-in metal, a magnetic attraction plate is arranged at the middle bottom end of the first prism carrier built-in metal, and the magnetic attraction plate is arranged opposite to the prism magnetic attraction magnet mounted on the second prism carrier and is mutually attracted.

[0041] Optionally, the second prism carrier is provided with a second prism carrier built-in metal, and the top middle of the second prism carrier built-in metal is arranged opposite to the prism magnetic attraction magnet and is mutually attracted.

[0042] Optionally, the second prism carrier is provided with a second prism carrier built-in metal, and the bottom end of the second prism carrier built-in metal is arranged opposite to the head-shaking magnet and is mutually attracted.

[0043] Optionally, the lens driving device further comprises a shell, the shell is detachably connected with the base and constitutes 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.

[0044] Beneficial effects: the utility model has at least one or more advantages as follows:

[0045] 1、 the utility model discloses a circuit board is set up on the base outer wall to replace the built-in circuit of traditional design in the base, and each component is powered by the circuit board, and the utility model discloses need not to carry out power supply layout to the base and its inside, greatly simplifies the base structure design. When carrying out power supply maintenance, other devices outside the circuit board need not to be replaced, and only need to be removed to realize quick maintenance.

[0046] 2、 the utility model discloses that the lens carrier metal plate is arranged opposite to the lens emission plate and the lens receiving plate, and the capacitance value between the lens emission plate and the lens receiving plate can be monitored by the lens carrier capacitor IC, and when the lens carrier metal plate moves along with the lens carrier, the capacitance value between the lens emission plate and the lens receiving plate will change, and the change amount of the capacitance value can realize the monitoring of the moving position of the lens carrier, and the structure plays the effect of a position sensor. Compared with the prior art, the utility model discloses need not to carry out power supply to the lens carrier metal plate on the lens carrier, that is, the lens carrier does not need to be provided with a power supply structure, and the structure design is more simple.

[0047] 3, the utility model discloses a nodding emission board and nodding receiving board are set up oppositely, so that the capacitor structure is formed between the both, and the prism carrier capacitor IC can monitor the capacitor structure, and the position monitoring of nodding direction is realized when the prism carrier and prism are in action, the utility model discloses a shaking emission board and shaking receiving board are set up oppositely, so that the capacitor structure is formed between the both, and the prism carrier capacitor IC can monitor the capacitor structure, and the position monitoring of shaking direction is realized when the prism carrier and prism are in action, the utility model discloses two capacitor structures and play the effect of position sensor.

[0048] 4, the utility model discloses the prism carrier capacitor IC is powered by the built-in metal of prism carrier as nodding emission board and shaking emission board by the ingenious adoption of elastic circuit board, that is, the power supply purpose can be realized through simple structure and layout, and the elastic circuit board design can also realize the certain activity allowance when the prism carrier nods and shakes.

[0049] 5, the utility model discloses the prism carrier is the split structure, is first prism carrier and second prism carrier respectively, and is additionally provided with nodding ball and shaking ball, so that when the nodding action of prism carrier, first prism carrier does the nodding action relative to second prism carrier with nodding ball as fulcrum, provides the rolling support effect through nodding ball, causes the nodding action to be light and smooth, reduces the activity resistance of prism carrier, makes the prism carrier realize the stable nodding action, when the shaking action of second prism carrier, the shaking ball is rolled in the ball groove, and the shaking action friction of second prism carrier is reduced. DRAWINGS

[0050] Figure 1 It is a structural schematic drawing of the utility model;

[0051] Figure 2 It is Figure 1 the explosion map;

[0052] Figure 3 It is Figure 2 the further explosion map;

[0053] Figure 4 It is Figure 3 the partial structure schematic drawing of another angle;

[0054] Figure 5 It is a structural schematic drawing of the base of the utility model;

[0055] Figure 6 It is Figure 5 the partial structure schematic drawing of another angle;

[0056] Figure 7 It is Figure 6 the internal structure schematic drawing;

[0057] Figure 8 is another angle view of the embodiment of the application; Figure 7

[0058] Figure 9 is a structural schematic view of a circuit board of the application;

[0059] Figure 10 is another angle view of the embodiment of the application; Figure 9

[0060] Figure 11 is a structural schematic view of a lens carrier built-in metal of the application;

[0061] Figure 12 is a structural exploded view of a prism carrier of the application;

[0062] Figure 13 is another angle view of the embodiment of the application; Figure 12

[0063] Figure 14 is an internal structural schematic view of 13. DETAILED DESCRIPTION

[0064] The preferred embodiments of the application will be described in detail with reference to the drawings, so that the purpose, characteristics and advantages of the application can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the application, but only to illustrate the essential spirit of the technical scheme of the application.

[0065] In the following description, for the purpose of explaining various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. However, one skilled in the relevant art will recognize that embodiments can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring aspects of the description.

[0066] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. In addition, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0067] ​​​In the following description, in order to clearly show the structure and working mode of the utility model, many directional words will be used for description, but "front", "back", "left", "right", "outer", "inner", "outward", "inward", "up", "down" and the like should be understood as convenient words, and should not be understood as limiting words.

[0068] 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 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, the 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.

[0069] Referring to Figures 1 to 14 , the utility model embodiment provides a lens driving device, the lens driving device includes base 10, prism carrier 20, lens carrier 30, prism driving mechanism and zoom driving mechanism.

[0070] Prism carrier 20 and lens carrier 30 are arranged in base 10 along the first direction, specifically, base 10 can be provided with prism carrier accommodating cavity and lens carrier 30 accommodating cavity along the first direction, prism carrier 20 is used to install prism and is arranged in prism carrier accommodating cavity, and lens carrier 30 is used to install lens and is arranged in lens carrier 30 accommodating cavity.

[0071] Zoom driving mechanism drives lens carrier 30 to move along the first direction by cooperating with zoom magnet 42 arranged on lens carrier 30 through zoom coil 41 arranged on base 10 to realize zoom function, prism driving mechanism drives prism carrier 20 to move around the second direction through nodding magnet 44 arranged on prism carrier 20 through nodding coil 43 arranged on base 10, and drives prism carrier 20 to move around the first direction through nodding magnet 46 arranged on prism carrier 20 through nodding coil 43 arranged on base 10 to realize optical anti-shake function. Prism carrier 20 drives prism to nod and shake, and the prism can turn the direction of passing light, and prism carrier 20 can move the prism to change the illumination direction of light. Wherein, the nodding action refers to the action of prism carrier 20 rotating around the second direction, and the shaking action refers to the action of rotating around the first direction.

[0072] The outer wall of base 10 is provided with circuit board 50, and the circuit board 50 is connected with zoom coil 41, nodding coil 43 and shaking coil 45 respectively.

[0073] In an embodiment, referring to Figure 5 and Figure 8 , zoom coil 41 is arranged on the inner wall of one side of base 10. Referring to Figure 3 andFigure 4 The zoom magnet 42 is arranged on the side wall of the lens carrier 30. The zoom coil 41 and the zoom magnet 42 are arranged oppositely and cooperate to generate driving force to drive the lens carrier 30 to perform zooming movement.

[0074] Referring to Figures 5 to 8 The nodding coil 43 is arranged on the inner wall of the rear end of the base 10. Referring to Figure 12 The nodding magnet 44 is arranged in the nodding magnet mounting groove of the rear end of the prism carrier 20. The nodding coil 43 and the nodding magnet 44 are arranged oppositely and cooperate to drive the prism carrier 20 to perform nodding movement.

[0075] Referring to Figures 5 to 8 The nodding coil 43 is arranged on the inner wall of the rear end of the base 10. Referring to Figure 4 The nodding magnet 44 is arranged in the nodding magnet mounting groove of the rear end of the prism carrier 20. The nodding coil 43 and the nodding magnet 44 are arranged oppositely and cooperate to drive the prism carrier 20 to perform nodding movement.

[0076] Referring to Figure 9 and Figure 10 The circuit board 50 is arranged in a U-shaped form on the outer side of the base 10, and the U-shaped form is in a horizontal state to match the outer wall of the base 10. The circuit board 50 is connected with the zoom coil 41 and the nodding coil 43 respectively, and the bottom circuit board 51 is arranged at the bottom end of the circuit board 50 and connected with the nodding coil 45. The bottom circuit board 51 can be integrally formed with the circuit board 50 or connected with the circuit board 50 by plug-in connection.

[0077] In an embodiment, the circuit board 50 is an FPC board.

[0078] In an embodiment, the bottom magnet suction sheet 52 is fixedly arranged at the bottom end of the bottom circuit board 51, and the bottom magnet suction sheet 52 is arranged oppositely to the nodding magnet 46 and is attracted to each other to improve the connection stability between the prism carrier 20 and the base 10.

[0079] In an embodiment, referring to Figure 7 The lens emission plate 61 and the lens receiving plate 62 are arranged in the third direction perpendicular to the first direction. Referring to Figure 6 The lens emission plate 61 and the lens receiving plate 62 are wrapped and formed by the injection molding structure 63 and arranged in the side wall of the base 10.

[0080] Referring to Figure 9 The lens emission plate 61 is connected with the lens carrier capacitor IC 64 arranged on the circuit board 50, and the lens carrier capacitor IC 64 and the lens receiving plate 62 are connected with power supply by the circuit board 50.

[0081] Referring to Figure 11The lens carrier 30 is provided with a lens carrier built-in metal 31, and the lens carrier metal plate 311 is arranged on the side of the lens carrier built-in metal 31. The lens carrier metal plate 311 is arranged opposite to the lens emission plate 61 and the lens receiving plate 62.

[0082] The lens carrier capacitor IC 64 can monitor the capacitance between the lens emission plate 61 and the lens receiving plate 62. The lens carrier metal plate 311 moves along with the movement of the lens carrier 30 in the first direction. The projection area of the lens carrier metal plate 311 directly with the lens emission plate 61 and the projection area of the lens carrier metal plate 311 directly with the lens receiving plate 62 are changed along with the movement of the lens carrier metal plate 311.

[0083] The capacitance between the projection area of the lens emission plate 61 and the projection area of the lens receiving plate 62 is changed due to the jumping bridge characteristics of the lens carrier metal plate 311. When a positive voltage signal is applied to the lens emission plate 61, a large amount of positive charges will be gathered on the surface of the lens emission plate 61, and then the lens carrier metal plate 311 corresponding to the lens emission plate 61 will gather negative charges. Since the lens carrier metal plate 311 has no external circuit, the charges will not be transferred. Since the lens carrier metal plate 311 itself is charge conservation, positive charges will be gathered on the other side, that is, the side close to the lens receiving plate 62. Then the lens receiving plate 62 will be affected by the positive charges of the lens carrier metal plate 311, and negative charges will be gathered on the surface. In this way, the capacitance effect between the two plates is completed.

[0084] Therefore, due to the existence of the lens carrier metal plate 311, the dielectric of the space between the lens emission plate 61 and the lens receiving plate 62 occupied by the lens carrier metal plate 311 is equivalent to disappearing, which equivalently shortens the distance between the lens emission plate 61 and the lens receiving plate 62. Therefore, according to the formula C=εS / 4πkd, where C is the capacitance, ε is the dielectric constant of the medium, k is the electrostatic force constant, S is the overlapping area of the two plates, and d is the vertical distance between the two plates, it can be known that due to the existence of the lens carrier metal plate 311, the distance d between the lens emission plate 61 and the lens receiving plate 62 is equivalently shortened, so that the capacitance of the part of the lens emission plate 61 and the part of the lens receiving plate 62 which has the projection area of the lens carrier metal plate 311 is larger. Therefore, during the movement of the lens carrier metal plate 311 along with the movement of the lens carrier 30, the capacitance between the lens emission plate 61 and the lens receiving plate 62 will show a linear change trend, so that the lens carrier capacitor IC 64 can more easily determine the position of the lens carrier 30 according to the linearly changed capacitance between the lens emission plate 61 and the lens receiving plate 62, and control the movement of the lens carrier 30 in the focusing direction, so that the lens carrier 30 can be moved to the target position, and the precision of the focusing closed-loop control is improved.

[0085] The utility model discloses a lens emission plate 61, the capacitance value between the lens receiving plate 62 can produce change when the lens carrier metal sheet 311 moves along with the lens carrier 30, and the monitoring of the moving position of the lens carrier 30 can be realized according to the capacitance value change, and the effect of position sensor is played by the structure.

[0086] In an embodiment, the lens receiving plate 62 is two, and the two lens receiving plates 62 are arranged side by side along the first direction and below the lens emission plate 61.

[0087] At this time, the length of the lens emission plate 61 can be greater than or equal to the length of the two lens receiving plates 62. In the case that there is a gap between the two lens receiving plates 62, the length of the lens emission plate 61 is greater than or equal to the sum of the length of the two lens receiving plates 62 and the gap. The length of the lens emission plate 61 and the length of the lens receiving plate 62 are both the length along the first direction, the width of the lens emission plate 61 and the width of the lens receiving plate 62 are the same, and the two lens receiving plates 62 are the same in shape and size.

[0088] At this time, the area of the projection region between the lens carrier metal sheet 311 and one lens receiving plate 62 gradually decreases, and the area of the projection region between the lens carrier metal sheet 311 and the other lens receiving plate 62 gradually increases during the movement of the lens carrier metal sheet 311 along with the lens carrier 30 along the first direction, and the area of the projection region between the lens carrier metal sheet 311 and the lens emission plate 61 remains unchanged during the movement. Therefore, during the movement of the lens carrier metal sheet 311 along with the lens carrier 30 along the first direction, the reference capacitance between the lens emission plate 61 and one lens receiving plate 62 gradually increases, and the reference capacitance between the lens emission plate 61 and the other lens receiving plate 62 gradually decreases. By arranging two lens receiving plates 62 in the embodiment, the robustness of the capacitance signal is strengthened by the linearly changed capacitance between the lens emission plate 61 and the two lens receiving plates 62, and the accuracy of the focus closed-loop control is further improved. At the same time, the lens carrier 30 is controlled to move to the target position by the two reference capacitances formed in the embodiment, which is more convenient to offset the influence of environmental factors on the obtained capacitance signal, makes the position of the lens carrier 30 controlled to move more accurate, and thus improves the accuracy of the focus closed-loop control.

[0089] In an embodiment, the lens carrier 30 is provided with a bottom magnetic magnet mounting groove 32 at the bottom end to mount a lens carrier adsorbing magnet. The bottom end of the built-in metal 31 in the lens carrier is arranged opposite to the lens carrier adsorbing magnet and is adsorbed with each other.

[0090] Referring to Figures 6 to 8 , the base 10 is provided with a base built-in metal plate 11, and the base built-in metal plate 11 is arranged opposite to the lens carrier adsorbing magnet and is adsorbed with each other.

[0091] The lens carrier adsorbs the magnet and the built-in metal plate 11 in the base to generate adsorption force, so that the structure between the lens carrier 30 and the base 10 is more stable.

[0092] In an embodiment, referring to Figure 7 , the built-in metal plate 11 is embedded in the base 10, and the built-in metal plate 11 is provided with a metal protruding structure 111 on the side close to the lens receiving plate 62, and the metal protruding structure 111 is embedded in the injection molding structure 63 of the lens emitting plate 61 and the lens receiving plate 62.

[0093] When the lens emitting plate 61 and the lens receiving plate 62 are injection molded into the injection molding structure 63, the metal protruding structure 111 is also injection molded at the same time, so that the injection molding structure 63 contains the lens emitting plate 61, the lens receiving plate 62 and the metal protruding structure 111. The design of the metal protruding structure 111 can effectively enhance the strength of the injection molding structure 63 and the overall structural strength of the base 10.

[0094] Specifically, the metal protruding structure 111 is located on the side of the base 10 and on the same side as the lens emitting plate 61 and the lens receiving plate 62. The metal protruding structure 111 can be in the form of an inverted U-shaped structure surrounding the outside of the lens emitting plate 61 and the lens receiving plate 62.

[0095] In an embodiment, the lens carrier built-in metal 31 has a side away from the lens carrier metal plate 311, and the side of the lens carrier built-in metal 31 is arranged opposite to the zoom magnet 42 and is adsorbed to each other to improve the connection stability of the zoom magnet 42.

[0096] In an embodiment, referring to Figure 2 and Figure 3 , the lens carrier 30 is detachably provided with a cover plate 33 for fixing the lens at the top end.

[0097] In an embodiment, referring to Figure 3 and Figure 5 , the lens carrier 30 is provided with a zoom ball groove between the bottom end and the inner bottom end of the base 10, and the zoom ball 34 is connected by rolling in the zoom ball groove.

[0098] In an embodiment, referring to Figure 3 and Figure 4 , the lens carrier 30 is provided with an anti-collision part 35 at the front and rear ends respectively.

[0099] In an embodiment, referring to Figures 6 to 8, the bottom end of the base 10 is provided with a nodding receiving plate 65, and the sidewall of the base 10 is provided with a shaking receiving plate 66, which is wrapped and formed by an injection molding structure 67 and arranged in the sidewall of the base 10. The nodding receiving plate 65 and the shaking receiving plate 66 are connected to the power supply by the circuit board 50, or the nodding receiving plate 65 and the shaking receiving plate 66 are connected to the prism carrier capacitor IC 60 arranged on the circuit board 50.

[0100] Referring to Figure 14 , the prism carrier 20 is provided with a prism carrier built-in metal 21, and the top end of the prism carrier built-in metal 21 is provided with a power connection plate 211. The bottom of the prism carrier built-in metal 21 is provided with a nodding emission plate 68, and one side of the prism carrier built-in metal 21 is provided with a shaking emission plate 69. The nodding emission plate 68 is arranged opposite to the nodding receiving plate 65 to form a capacitor structure. When the prism carrier 20 performs a nodding action, the capacitance value of the capacitor structure will change, thereby realizing the position monitoring of the nodding direction of the prism. The shaking emission plate 69 is arranged opposite to the shaking receiving plate 66 to form a capacitor structure. When the prism carrier 20 performs a shaking action, the capacitance value of the capacitor structure will change, thereby realizing the position monitoring of the shaking direction of the prism.

[0101] Referring to Figure 9 and Figure 10 , the top end of the circuit board 50 is provided with an elastic circuit board 53, the elastic circuit board 53 is connected to the prism carrier capacitor IC 60 arranged on the circuit board 50, and the prism carrier capacitor IC 60 is powered by the circuit board 50. One end of the elastic circuit board 53 is connected to the power connection plate 211 arranged at the top end of the prism carrier built-in metal 21. The nodding emission plate 68 and the shaking emission plate 69 are connected to the circuit board 50 in sequence through the prism carrier built-in metal 21 and the elastic circuit board 53 and are powered by the circuit board 50, or the nodding emission plate 68 and the shaking emission plate 69 are connected to the prism carrier capacitor IC 60 in sequence through the prism carrier built-in metal 21 and the elastic circuit board 53.

[0102] The nodding receiving plate 65 and the shaking receiving plate 66 are a group of receiving plates, and the nodding emission plate 68 and the shaking emission plate 69 are a group of emission plates. At least one of the group of receiving plates and the group of emission plates is connected to the prism carrier capacitor IC 60.

[0103] The elastic circuit board 53 can be a sheet structure connected in multiple sections to achieve a certain elasticity. The elastic circuit board 53 can be integrally made with the circuit board 50 or connected by plugging as part of the circuit board 50.

[0104] In specific implementation, the elastic circuit board connection point 211a can be arranged on the power connection plate 211, the elastic circuit board connection point 211a is exposed on the prism carrier 20, and one end of the elastic circuit board 53 is connected to the elastic circuit board connection point 211a.

[0105] The utility model discloses a pair of metal plates (namely a pair of transmission plate and receiving plate) are arranged oppositely and are electrified to form a capacitor structure, when one of the metal plates moves (namely the transmission plate moves), the capacitance between the two changes, and the prism carrier capacitor IC 60 can monitor the capacitance, thus two groups of relatively independent capacitor structures are designed to realize the position monitoring of the prism carrier in the nodding direction and the shaking direction.

[0106] Of course, in the above design, the nodding transmission plate and the nodding receiving plate, and the shaking transmission plate and the shaking receiving plate form capacitor structures after being electrified, and the transmission and reception relationship still has the capacitor structure effect, that is, the relationship between the transmission plate and the receiving plate can be adjusted, which does not affect the position monitoring effect of the prism. The following various capacitor structures can be realized:

[0107] One is that the nodding receiving plate 65 and the shaking receiving plate 66 are connected and powered by the circuit board 50, the nodding transmission plate 68 and the shaking transmission plate 69 are connected to the prism carrier capacitor IC 60 through the prism carrier built-in metal 21 and the elastic circuit board 53 in turn, and the capacitor structure is formed between the nodding transmission plate 68 and the nodding receiving plate 65, and another capacitor structure is formed between the shaking transmission plate 69 and the shaking receiving plate 66.

[0108] Another is that the nodding receiving plate 65 and the shaking receiving plate 66 are connected to the prism carrier capacitor IC 60, the nodding transmission plate 68 and the shaking transmission plate 69 are connected to the prism carrier capacitor IC 60 through the prism carrier built-in metal 21 and the elastic circuit board 53 in turn, the capacitor structure is formed between the nodding transmission plate 68 and the nodding receiving plate 65, and another capacitor structure is formed between the shaking transmission plate 69 and the shaking receiving plate 66.

[0109] Still another is that the nodding receiving plate 65 and the shaking receiving plate 66 are connected to the prism carrier capacitor IC 60, the nodding transmission plate 68 and the shaking transmission plate 69 are connected to the circuit board 50 through the prism carrier built-in metal 21 and the elastic circuit board 53 in turn and are powered by the circuit board 50, the capacitor structure is formed between the nodding transmission plate 68 and the nodding receiving plate 65, and another capacitor structure is formed between the shaking transmission plate 69 and the shaking receiving plate 66.

[0110] From the above different capacitor structures, at least one group of receiving plates and one group of transmission plates need to be connected to the prism carrier capacitor IC 60, and one group of receiving plates and one group of transmission plates can be connected to the prism carrier capacitor IC 60 at the same time, and the receiving plate or the transmission plate not connected to the prism carrier capacitor IC 60 needs to be powered by the circuit board 50.

[0111] In an embodiment, refer to Figures 6 to 8The base 10 is provided with a base built-in metal plate 11 embedded in the base 10. The base built-in metal plate 11 is provided with a metal protruding structure 112 on a side close to the nodding receiving plate 65. The metal protruding structure 112 is embedded in the injection molding structure 67 of the nodding receiving plate 65.

[0112] The design of the metal protruding structure 112 can effectively enhance the strength of the injection molding structure 67 and the overall structural strength of the base 10.

[0113] In an embodiment, referring to Figures 6 to 8 The nodding receiving plate 65 is two, and the two nodding receiving plates 65 are arranged side by side along the first direction.

[0114] In an embodiment, referring to Figure 7 The nodding receiving plate 66 is two, and the two nodding receiving plates 66 are arranged side by side along the first direction.

[0115] In an embodiment, the lens carrier capacitor IC 64 and the prism carrier capacitor IC 60 are both existing capacitor IC chips.

[0116] For example, the existing camera motor driving chip is used. The capacitor IC chip can use CH9914N / 9914P / 9914A series chips, and the capacitor IC chip preferably uses CHM9500 type chip.

[0117] In an embodiment, referring to Figure 12 and Figure 13 The prism carrier 20 includes a first prism carrier 20a and a second prism carrier 20b arranged at the lower end of the first prism carrier 20a. The prism is mounted on the first prism carrier 20a.

[0118] The second prism carrier 20b is provided with a nodding ball 22 at the top end, the nodding ball 22 abuts against the bottom end of the first prism carrier 20a, and the first prism carrier 20a moves around the second direction with the nodding ball 22 as the fulcrum.

[0119] The nodding magnet 44 is arranged in the nodding magnet mounting groove at the rear end of the first prism carrier 20a, and the nodding magnet 46 is arranged in the nodding magnet mounting groove at the bottom end of the second prism carrier 20b.

[0120] When the prism carrier 20 is provided with a prism carrier built-in metal 21, the prism carrier built-in metal 21 is arranged in the first prism carrier 20a, and the prism carrier built-in metal 21 is a first prism carrier built-in metal 26.

[0121] In an embodiment, referring to Figure 4 The bottom end of the second prism carrier 20b and the base 10 are provided with a nodding ball groove, and the nodding ball groove is rotatably connected with a nodding ball 23.

[0122] In an embodiment, the head-tilting ball groove is in an arc structure.

[0123] In an embodiment, the bottom end of the second prism carrier 20b and the inner bottom end of the base 10 are respectively provided with four head-tilting ball grooves, which are arranged around the bottom end of the second prism carrier 20b and the base 10.

[0124] In an embodiment, referring to Figure 13 , the bottom end of the first prism carrier 20a is provided with a mounting groove 24, and the second prism carrier 20b is provided with a mounting protrusion 25, the top end of which is provided with a nodding ball 22, the mounting protrusion 25 is matched with the mounting groove 24, and the nodding ball 22 abuts against the top end groove wall of the mounting groove 24.

[0125] In an embodiment, referring to Figure 12 and Figure 13 , the top end of the second prism carrier 20b is provided with two nodding balls 22 along the second direction.

[0126] In an embodiment, the nodding coil 43 is one, the nodding magnet 44 is a group, and the group of head-tilting magnets 46 has one or a plurality of head-tilting magnets 46 arranged side by side along the third direction.

[0127] In an embodiment, the head-tilting coil 45 is two, and the two head-tilting coils 45 are arranged side by side along the second direction. The head-tilting magnet 46 is two groups, and the two groups of head-tilting magnets 46 are arranged side by side along the second direction, and each group of head-tilting magnets 46 has one or a plurality of head-tilting magnets 46 arranged side by side along the first direction.

[0128] In an embodiment, referring to Figure 14 , the first prism carrier 20a is provided with a first prism carrier built-in metal 26, the middle bottom end of the first prism carrier built-in metal 26 is provided with a magnetic attraction plate 261, and the magnetic attraction plate 261 is arranged opposite to and attracted to the prism magnetic attraction magnet 27 mounted on the second prism carrier 20b, so as to improve the connection stability between the first prism carrier 20a and the second prism carrier 20b.

[0129] In an embodiment, referring to Figure 14 , the second prism carrier 20b is provided with a second prism carrier built-in metal 28, and the top end of the second prism carrier built-in metal 28 is arranged opposite to and attracted to the prism magnetic attraction magnet 27.

[0130] In an embodiment, referring to Figure 14 , the second prism carrier 20b is provided with a second prism carrier built-in metal 28, and the bottom end of the second prism carrier built-in metal 28 is arranged opposite to and attracted to the head-tilting magnet 46, so as to improve the connection stability of the head-tilting magnet 46.

[0131] In an embodiment, referring to Figures 1 to 3 , the lens driving device further comprises a housing 70, which is detachably connected with the base 10 and forms a hollow cavity, and the prism carrier 20, the lens carrier 30, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity.

[0132] In an embodiment, referring to Figures 1 to 3 , the housing 70 is provided with a downward recess 71, which is equivalent to a downward protrusion relative to the top surface in the housing 70.

[0133] The top end of the prism carrier 20 is provided with an upward protrusion 29.

[0134] After the housing 70 is detachably connected with the base 10, the recess 71 is located at the side of the protrusion 29, and there is a predetermined small gap between them, and they cooperate 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 to not hinder the normal nodding and shaking actions of the prism carrier.

[0135] Generally, when the prism carrier 20 performs nodding and shaking actions, the top end of the prism carrier 20 will not touch the housing 70, but in extreme cases, such as special scenes where the terminal equipped with the lens driving device falls from a high place, the prism carrier may have a large amount of movement, and each adsorption part may be separated, at this time The top end of the prism carrier 20 may touch the housing 70.

[0136] If the above recess 71 and protrusion 29 are not designed, the first prism carrier 20 may collide with the housing 70 at the front end, the rear end, or the side, which is uncontrollable, and the transmission of the collision force at which point is also uncontrollable, which will cause the prism carrier to be unable to reset after collision, resulting in the problem of being unable to perform anti-shake operation.

[0137] In this embodiment, through the cooperation of the above-mentioned recess 71 and protrusion 29, the prism carrier 20 can only be limited to a small range of shaking, and the collision contact between the prism carrier and the housing 70 can only be limited between the recess 71 and the protrusion 29, and finally the purpose of controllable contact surface and collision force transmission point is achieved.

[0138] In an embodiment, referring to Figures 1 to 3 , the housing 70 is provided with recesses 71 on both sides of the rear end, and the recesses 71 are arranged across the rear side and the side of the housing 70, and the top end of the prism carrier 20 is provided with protrusions 29 on both sides and the rear side, and after the housing 70 is detachably connected with the base 10, each recess 71 is located between each adjacent two protrusions 29.

[0139] In an embodiment, referring to Figure 2The front side of the recess 71 is a first inclined surface 71a.

[0140] The above has described the preferred embodiments of the present application in detail, but it should be understood that, after reading the above teaching of the present application, those skilled in the art can make various changes or modifications to the present application. These equivalent forms also fall within the scope defined by the claims of the present application.

Claims

1. A lens driving apparatus comprising a base, a prism carrier, a lens carrier, a prism driving mechanism, and a zoom driving mechanism, the lens carrier and the prism carrier being disposed in the base in a first direction, characterized by, The zoom driving mechanism drives the lens carrier to move along a first direction by cooperating the zoom coil arranged on the base with the zoom magnet arranged on the lens carrier, and the prism driving mechanism drives the prism carrier to move around the first direction and a second direction perpendicular to the first direction by cooperating the nod coil arranged on the base with the nod magnet arranged on the prism carrier and the pan coil arranged on the base with the pan magnet arranged on the prism carrier; The base outer wall is provided with a circuit board, and the circuit board is connected with the zoom coil, the nod coil and the pan coil respectively; The lens emission plate and the lens receiving plate are arranged along a third direction perpendicular to the first direction, and are wrapped and formed by injection molding structure and arranged in the base side wall, the lens emission plate is connected with the lens carrier capacitor IC arranged on the circuit board, and the lens carrier capacitor IC and the lens receiving plate are connected with the circuit board for power supply; The lens carrier is provided with a lens carrier built-in metal, and the side of the lens carrier built-in metal is provided with a lens carrier metal plate, and the lens carrier metal plate is arranged opposite to the lens emission plate and the lens receiving plate.

2. The lens driving device according to claim 1, wherein The zoom coil is arranged on the inner wall of one side of the base, the zoom magnet is arranged on the side wall of the lens carrier, the nod coil is arranged on the inner wall of the rear end of the base, the nod magnet is arranged in the nod magnet mounting groove of the rear end of the prism carrier, and the pan coil is arranged at the bottom end of the interior of the base, and the pan magnet is arranged in the pan magnet mounting groove of the bottom end of the prism carrier; The circuit board is arranged in a U-shaped shape and arranged on the outside of the base, the circuit board is connected with the zoom coil and the nod coil respectively, the bottom end of the circuit board is provided with a bottom circuit board, the bottom circuit board is arranged on the bottom of the base, and the bottom circuit board is connected with the pan coil; And / or, the circuit board is an FPC board; And / or, the lens driving device further comprises a shell, the shell is detachably connected with the base and constitutes a hollow cavity, the prism carrier, the lens carrier, the prism driving mechanism and the zoom driving mechanism are arranged in the hollow cavity.

3. The lens driving apparatus according to claim 2, wherein The bottom end of the bottom circuit board is fixedly provided with a bottom magnet suction sheet, and the bottom magnet suction sheet is arranged opposite to the pan magnet and is mutually adsorbed.

4. The lens driving apparatus according to claim 1, wherein The lens receiving plate is two, and the two lens receiving plates are arranged side by side along the first direction and located below the lens emission plate; And / or, the bottom end of the lens carrier is provided with a lens carrier adsorption magnet, the base is provided with a base built-in metal plate, the base built-in metal plate is arranged opposite to the lens carrier adsorption magnet and is mutually adsorbed; the bottom end of the lens carrier built-in metal is arranged opposite to the lens carrier adsorption magnet and is mutually adsorbed; And / or, the bottom end of the lens carrier is provided with a lens carrier adsorption magnet, the base is provided with a base built-in metal plate, the base built-in metal plate is arranged opposite to the lens carrier adsorption magnet and is mutually adsorbed; the bottom end of the lens carrier built-in metal is arranged opposite to the lens carrier adsorption magnet and is mutually adsorbed; And / or, the base is provided with a base built-in metal plate, the base built-in metal plate is embedded in the base, a metal protruding structure is arranged on one side of the base built-in metal plate close to the lens receiving plate, and the metal protruding structure is embedded in the injection molding structure of the lens emitting plate and the lens receiving plate; And / or, the side of the lens carrier built-in metal plate away from the lens carrier metal plate has a side surface, the side surface of the lens carrier built-in metal plate is arranged opposite to the zoom magnet and is mutually adsorbed; And / or, the top end of the lens carrier is detachably provided with a cover plate for fixing the lens; And / or, the bottom end of the lens carrier and the bottom end of the base are provided with a zoom ball groove, and the zoom ball groove is rotatably connected with a zoom ball; And / or, the front and rear ends of the lens carrier are respectively provided with anti-collision parts.

5. The lens driving apparatus according to claim 1, 2 or 3, wherein The bottom end of the base is provided with a nodding receiving plate, the side wall of the base is provided with a shaking receiving plate, the shaking receiving plate is wrapped and formed by an injection molding structure and arranged in the side wall of the base, and the nodding receiving plate and the shaking receiving plate are connected to be powered by the circuit board or connected to the prism carrier capacitor IC arranged on the circuit board respectively; The prism carrier is provided with a prism carrier built-in metal plate, the bottom of the prism carrier built-in metal plate is provided with a nodding emitting plate, one side of the prism carrier built-in metal plate is provided with a shaking emitting plate, the nodding emitting plate is arranged opposite to the nodding receiving plate, and the shaking emitting plate is arranged opposite to the shaking receiving plate; The top end of the circuit board is provided with an elastic circuit board, the elastic circuit board is connected to the prism carrier capacitor IC arranged on the circuit board, one end of the elastic circuit board is connected to a power connection plate arranged on one side of the top end of the prism carrier built-in metal plate, the nodding emitting plate and the shaking emitting plate are connected to the circuit board in sequence through the prism carrier built-in metal plate and the elastic circuit board and are powered by the circuit board or connected to the prism carrier capacitor IC; The nodding receiving plate and the shaking receiving plate are a group of receiving plates, the nodding emitting plate and the shaking emitting plate are a group of emitting plates, and at least one of the group of receiving plates and the group of emitting plates is connected to the prism carrier capacitor IC.

6. The lens driving apparatus according to claim 5, wherein The base is provided with a base built-in metal plate, the base built-in metal plate is embedded in the base, a metal protruding structure is arranged on one side of the base built-in metal plate close to the shaking receiving plate, and the metal protruding structure is embedded in the injection molding structure of the shaking receiving plate; And / or, the two nodding receiving plates are arranged side by side along the first direction; And / or, the two shaking receiving plates are arranged side by side along the first direction.

7. The lens driving apparatus according to claim 1, 2, or 3, wherein The prism carrier includes a first prism carrier and a second prism carrier arranged at the bottom end of the first prism carrier, the top end of the second prism carrier is provided with a nodding ball, 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. The nodding magnet is arranged in a nodding magnet mounting groove at the rear end of the first prism carrier, and the shaking magnet is arranged in a shaking magnet mounting groove at the bottom end of the second prism carrier.

8. The lens driving apparatus according to claim 7, wherein A shaking ball groove is arranged between the bottom end of the second prism carrier and the base, and a shaking ball is arranged in the shaking ball groove in rolling connection; And / or, the bottom end of the first prism carrier is provided with a mounting groove, the second prism carrier is provided with a mounting protrusion, the top end of the mounting protrusion is provided with the nodding ball, the mounting protrusion is matched with the mounting groove, and the nodding ball abuts against the top end groove wall of the mounting groove; And / or, the top end of the second prism carrier is provided with two nodding balls in the second direction; And / or, the nodding coil is one, the nodding magnet is a group, and one or a plurality of shaking magnets are arranged side by side in the third direction perpendicular to the first direction; And / or, the shaking coil is two, the two shaking coils are arranged side by side in the second direction, the shaking magnet is two groups, the two groups of shaking magnets are arranged side by side in the second direction, and each group of shaking magnets has one or a plurality of shaking magnets arranged side by side in the first direction; And / or, the first prism carrier is provided with a first prism carrier built-in metal, the middle bottom end of the first prism carrier built-in metal is provided with a magnetic attraction plate, the magnetic attraction plate is arranged opposite to the prism magnetic attraction magnet mounted on the second prism carrier and is mutually attracted; And / or, the second prism carrier is provided with a second prism carrier built-in metal, the bottom end of the second prism carrier built-in metal is arranged opposite to the shaking magnet and is mutually attracted.

9. The lens driving apparatus according to claim 8, wherein The shaking ball groove is a circular arc structure; And / or, the shaking ball grooves at the bottom end of the second prism carrier and the inner bottom end of the base are four respectively, and the four shaking ball grooves are arranged around the second prism carrier and the base respectively; And / or, the second prism carrier is provided with a second prism carrier built-in metal, and the top end of the second prism carrier built-in metal is arranged opposite to the prism magnetic attraction magnet and is mutually attracted.

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