Coil assembly and lens module

Abstract

The utility model discloses a kind of coil assembly and lens module, two lead wires are set to the outer side surface of ring body, and the first end surface of ring body is set to the mounting plane of first magnetic conducting plate. Therefore, on the one hand, prevent the connection of lead wire to coil and first magnetic conducting plate from causing interference, avoid opening the avoiding slot for avoiding lead wire on mounting plane. And make the thickness of each area of first magnetic conducting plate as consistent as possible, reduce the processing difficulty and cost of first magnetic conducting plate. On the other hand, each area of the first end surface of ring body can be in abutment with mounting plane, avoid forming gap between ring body and mounting plane. Further, the induced magnetic field generated by coil can form driving magnetic field acting on magnetic assembly together with first magnetic conducting plate, help driving magnetic field have better magnetic line distribution state, improve the driving performance of coil assembly.

Description

Technical Field

[0001] This utility model relates to the field of coil technology, and in particular to a coil assembly and a lens module. Background Technology

[0002] The coil's leads are used to connect to the control circuit, allowing the circuit to power the coil. However, when fixing the coil, the leads must be kept away from the coil, increasing the difficulty of fixing it and affecting the magnetic field generated by the coil. Optimizing the coil fixing method to improve the spatial distribution of the magnetic field generated by the coil becomes a problem that needs to be solved. Utility Model Content

[0003] In view of this, this utility model embodiment provides a coil assembly and a lens module, in which two leads are disposed on the outer surface of the coil body so that the first end face of the coil body can contact the mounting plane. This optimizes the coil fixing method and improves the spatial distribution of the magnetic field generated by the coil.

[0004] According to a first aspect of the present invention, a coil assembly is provided, the coil assembly comprising: A first magnetic plate includes a mounting plane and a central through hole, the mounting plane extending continuously; and A coil includes a coil body and two leads connected to the coil body. The coil body has a first end face, an outer side face, and an inner side face. The first end face is located between the outer side face and the inner side face. The outer side face extends circumferentially along the coil body and is opposite to the inner side face. The central through hole corresponds to the center of the coil body. The coil is connected to the mounting plane through the first end face, and the two leads extend from the outer side.

[0005] Furthermore, the lead wire includes a first connecting end, two first connecting ends are located on both sides of the coil body, and the two first connecting ends are located on the outer side of the coil body near the mounting plane.

[0006] Furthermore, the mounting plane has an outer edge; In the direction of the projection of the first magnetic plate, the outer side of the ring is located inside the outer edge, and the mounting plane is located in the area between the outer edge and the outer side to form a mounting gap; The first connecting end is attached to the outer side and extends along the installation gap.

[0007] Furthermore, the coil assembly also includes: A circuit board is disposed on the surface of the first magnetic plate that is opposite to the mounting plane; The lead also includes a second connection end, which extends toward the circuit board and is electrically connected to the circuit board.

[0008] Secondly, this utility model embodiment also provides a lens module, the lens module comprising: The mounting section includes a movable base and a fixed base; An imaging unit is disposed on the movable base; A first lens is mounted on the fixed base; and The driving unit includes a magnetic component and a coil component according to the first aspect above, wherein one of the magnetic component and the coil component is disposed on the movable base and the other is disposed on the fixed base; The magnetic field generated by the coil assembly acts on the magnetic assembly to move the imaging unit closer to or away from the first lens.

[0009] Furthermore, the first end face is oriented to the side of the first lens; The mounting section also includes two guide structures: The magnetic component is disposed on the movable base and located between the two guide structures, and the movable base moves along the axial direction of the first lens via the two guide structures.

[0010] Furthermore, the movable seat has two first guide grooves; The fixing seat has two second guide grooves respectively arranged opposite to the two first guide grooves; The mounting part includes a plurality of balls, which together form two ball sets corresponding to the two first guide grooves. The ball sets are rotatably disposed between the corresponding first guide groove and the corresponding second guide groove to form the guide structure.

[0011] Furthermore, both the first guide groove and the second guide groove are trapezoidal grooves; The trapezoidal groove of the movable seat is oriented opposite to the trapezoidal groove of the fixed seat, and the trapezoidal groove extends along the axial direction of the first lens.

[0012] Furthermore, a first stop is provided at one end of the first guide groove, and the first stop protrudes into the second guide groove; The second guide groove has a second stop protruding at one end away from the first stop, and the second stop protrudes into the first guide groove; The movable seat moves a predetermined distance toward the first lens, and the balls at both ends of the ball assembly abut against the first stop and the second stop, respectively.

[0013] Furthermore, the magnetic component includes two magnetic parts, which are arranged along the axial direction of the first lens; The side of the magnetic part facing the first magnetic plate is parallel to the mounting plane, and the magnetic force of the magnetic part acts on the first magnetic plate to drive the first guide groove and the second guide groove to abut against the ball.

[0014] Furthermore, the magnetic component also includes a second magnetic plate; The magnetic part includes a first magnet and a second magnet. The first magnet of one magnetic part is attracted between the second magnet and the second magnetic plate, and the second magnet of the other magnetic part is attracted between the first magnet and the second magnetic plate. The polarities of the two first magnets are opposite.

[0015] Furthermore, the magnetic component also includes a magnetically conductive block, the side of which is away from the coil component abuts against the second magnetically conductive plate, and the magnetically conductive block is attracted between the two magnetic parts.

[0016] Furthermore, the fixed base includes a top shell, a mounting plate, and a bottom shell. The top shell covers the bottom shell and forms a receiving cavity. The top shell has a mounting hole. The movable base and the mounting plate are disposed in the receiving cavity, and the first lens is in the mounting hole. The coil assembly is disposed on the mounting plate, and the magnetic assembly is disposed on the movable base.

[0017] Furthermore, the lens module also includes a flexible circuit board disposed on the bottom shell. The flexible circuit board includes a first connection area, a connecting arm, and a second connection area. The first connection area is located on the side of the imaging unit away from the first lens. The first connection area is electrically connected to the imaging unit and fixed to it. The second connection area is located on the outside of the accommodating cavity. When the movable seat moves upward, the imaging unit moves the first connecting area upward together, and the connecting arm bends and generates a restoring elastic force.

[0018] Furthermore, the mounting base also includes a base frame having a first mounting surface and a second mounting surface that are opposite to each other, the second mounting surface having a clearance area; The edge of the top shell abuts against the first mounting surface, the bottom shell abuts against the second mounting surface, and the clearance area is spaced apart from the bottom shell and forms a clearance gap on opposite sides; The base frame is arranged around the first connecting area, the connecting arm, and at least part of the mounting plate, and the second connecting area extends through the avoidance gap.

[0019] Furthermore, the bottom frame includes at least one pad; In the cross-sectional direction along the first lens axis, the first mounting surface surrounds and is offset from the movable seat, and a pad is located inside the first mounting surface and overlaps with a portion of the movable seat on the side away from the coil assembly.

[0020] The coil assembly and lens module of this utility model embodiment have two leads disposed on the outer side of the coil body, and the first end face of the coil body is disposed on the mounting plane of the first magnetic plate. This prevents the leads from interfering with the connection between the coil and the first magnetic plate, avoiding the need for clearance grooves on the mounting plane. It also ensures that the thickness of each area of ​​the first magnetic plate is as consistent as possible, reducing the processing difficulty and cost of the first magnetic plate. Furthermore, each area of ​​the first end face of the coil body can abut against the mounting plane, preventing gaps between the coil body and the mounting plane. Consequently, the induced magnetic field generated by the coil can, together with the first magnetic plate, form a driving magnetic field acting on the magnetic component, contributing to a better magnetic field line distribution and improving the driving performance of the coil assembly. Attached Figure Description

[0021] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the lens module structure according to an embodiment of the present utility model; Figure 2 This is an exploded view of one side of the lens module according to an embodiment of the present invention; Figure 3 This is an exploded view of the other side of the lens module in this embodiment of the present invention; Figure 4 This is an exploded view of another side of the lens module according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the drive unit according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the coil assembly according to an embodiment of the present invention; Figure 7 This is a cross-sectional view of one side of the lens module according to an embodiment of the present invention; Figure 8 This is a cross-sectional view of the lens module on the other side of an embodiment of the present utility model. Figure 9 This is a schematic diagram of the structure of the first magnetic plate in other embodiments of this utility model.

[0022] Explanation of reference numerals in the attached figures: 1-Coil; 11-Circle body; 111-First end face; 112-Outer side face; 113-Inner side face; 12-Lead; 121-First connection terminal; 122-Second connection terminal; 2-First magnetic plate; 21-Mounting plane; 211-Outer edge; 212-Mounting gap; 22 - Center through hole; 231 - First plate; 232 - Second plate; 23-Avoidance groove; 3-Circuit board; 4-Installation section; 41-Modible seat; 411-First guide groove; 412-First stop; 42-Fixed base; 421-Second guide groove; 422-Second stop; 43-Guide structure; 44 - Ball bearing; 45 - Ball bearing assembly; 461-Top shell; 462-Mounting plate; 463-Bottom shell; 464-Bottom frame; 4641-Padded block; 465-First mounting surface; 466-Second mounting surface; 467-Avoidance area; 468-Avoidance gap; 469-Disconnection opening; 5-Imaging unit; 6-First shot; 7-Drive unit; 71-Magnetic assembly; 711-Magnetic part; 712-Second magnetic plate; 7131-First magnet; 7132-Second magnet; 713-Magnetic block; 8-Flexible circuit board; 81-First connection area; 82-Connecting arm; 83-Second connection area. Detailed Implementation

[0023] The present invention will now be described based on embodiments, but it is not limited to these embodiments. In the following detailed description of the present invention, certain specific details are described in detail. Those skilled in the art will fully understand the present invention even without these details. To avoid obscuring the essence of the present invention, well-known methods, processes, flows, elements, and circuits are not described in detail.

[0024] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0025] Unless the context explicitly requires it, words such as "including" or "contains" throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to".

[0026] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] For ease of explanation, spatially related terms such as “inside,” “outside,” “below,” “below,” “lower,” “above,” “upper,” etc., are used herein to describe the relationship between one element or feature illustrated in the figure and another. It will be understood that spatially related terms may be intended to encompass different orientations of the device in use or operation besides those depicted in the figure. For example, if the device in the figure is flipped, an element described as “below” or “below” another element or feature would then be positioned “above” that other element or feature. Thus, the exemplified term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially related descriptive terms used herein should be interpreted accordingly.

[0029] Figure 1 This is a schematic diagram of the lens module in this embodiment. Figure 2 , Figure 3 and Figure 4 This is an exploded view of the lens module in this embodiment.

[0030] In some implementations, such as Figures 1-4As shown, the lens module in this embodiment includes a mounting part 4, a first lens 6, a driving part 7, and an imaging part 5. The mounting part 4 includes a movable base 41, a fixed base 42, and a guide structure 43. The movable base 41 is used to mount the imaging part 5, and the fixed base 42 is used to mount the first lens 6. The driving part 7 can drive the movable base 41 to move relative to the fixed base 42 to change the distance between the imaging part 5 and the first lens 6, thereby achieving optical adjustment (e.g., zoom). Under the guidance of the guide structure 43, it is ensured that light entering from the first lens 6 can enter the imaging part 5. The imaging part 5 can be an image sensor (e.g., a CMOS image sensor or a CCD image sensor). The photosensitive surface of the image sensor faces the first lens 6. The movable base 41 can also mount a second lens corresponding to the first lens 6, which can be located between the first lens 6 and the imaging part 5.

[0031] Figure 5 This is a schematic diagram of the drive unit 7 in this embodiment. Figure 6 This is a schematic diagram of the coil assembly in this embodiment.

[0032] In some implementations, such as Figure 5 As shown, the driving unit 7 in this embodiment includes a magnetic component 71 and a coil component. The magnetic field generated by the coil component acts on the magnetic component 71, thereby causing the magnetic component 71 to move relative to the coil component. Further referring to... Figure 4 and Figure 6 As shown, the coil assembly includes a coil 1 and a first magnetic plate 2. The first magnetic plate 2 includes a mounting plane 21 that extends continuously along a plane, such that the thickness of the mounting plane 21 remains consistent at various locations within the region of the first magnetic plate 2.

[0033] Further reference Figure 3 and Figure 6 As shown, coil 1 includes a coil body 11 and two leads 12 connected to the coil body 11. The coil body 11 has a first end face 111, an outer side face 112, and an inner side face 113. The first end face 111 is located between the outer side face 112 and the inner side face 113. Both the outer side face 112 and the inner side face 113 extend circumferentially along the coil body 11, and the outer side face 112 is opposite to the inner side face 113. The outer side face 112 faces outward from the coil body 11, and the inner side face 113 faces the center of the coil body 11. The direction of movement of the aforementioned movable seat 41 is perpendicular to the axial direction of the coil body 11.

[0034] Simultaneously, coil 1 can be connected to mounting plane 21 through first end face 111. This avoids interference from lead wire 12 in the connection between first end face 111 and mounting plane 21, and also makes the connection between coil 11 and first magnetic plate 2 more stable. The distance from coil 11 to first magnetic plate 2 remains consistent across all circumferential regions. When the magnetic field generated by coil 11 acts on first magnetic plate 2, the magnetic field distribution of the coil assembly is more uniform and symmetrical. Coil 11 can be fixedly connected to mounting plane 21 by adhesive bonding.

[0035] Specifically, coil 1 includes a conductor, which comprises a wound section and an extended section along its length. The wound section is wound in a predetermined manner to form the aforementioned coil body 11, and two extended sections extend from the coil body 11 to form two leads 12 respectively. The winding method of the aforementioned wound section allows the two leads 12 to extend from the outer side 112 respectively. Coil 1 can be wound using an alpha winding method, for example, using the prior art disclosed in publication number CN119852068A to wind the conductor.

[0036] In summary, in this embodiment, the coil assembly has two leads 12 disposed on the outer surface 112 of the coil body 11, and the first end face 111 of the coil body 11 disposed on the mounting plane 21 of the first magnetic plate 2. This prevents the leads 12 from interfering with the connection between the coil 1 and the first magnetic plate 2, avoiding the need for clearance grooves 23 on the mounting plane 21 to accommodate the leads 12. It also ensures that the thickness of each region of the first magnetic plate 2 is as consistent as possible, reducing the processing difficulty and cost of the first magnetic plate 2. Furthermore, each region of the first end face 111 of the coil body 11 can abut against the mounting plane 21, preventing gaps from forming between the coil body 11 and the mounting plane 21. Consequently, the induced magnetic field generated by the coil 1, together with the first magnetic plate 2, forms a driving magnetic field acting on the magnetic component 71, which helps the driving magnetic field to have a better magnetic field line distribution and improves the driving performance of the coil assembly.

[0037] In some implementations, such as Figure 6 As shown, both leads 12 include a first connecting end 121. The two first connecting ends 121 are located on both sides of the coil 11, and on the outer side 112 near the mounting plane 21. In this embodiment, the two leads 12 are separated to facilitate connection to the lead 12 control circuit. The position of the lead 12 on the outer side 112 near the first magnetic plate 2 reduces the suspended area of ​​the lead 12.

[0038] In some implementations, such as Figure 6As shown, the mounting plane 21 has an outer edge 211 (as indicated by the dashed line in the figure). In the direction of the projection of the first magnetic plate 2, the outer side surface 112 of the ring body 11 is located inside the outer edge 211, and the mounting plane 21 forms a mounting gap 212 in the area between the outer edge 211 and the outer side surface 112. This mounting gap 212 can be an annular surface. The first connecting end 121 is attached to the outer side surface 112 and extends along the mounting gap 212.

[0039] In this embodiment, the first magnetic plate 2 is slightly larger than the diameter of the coil 11, ensuring that the first end face 111 can be completely attached to the mounting plane 21. The lead wire 12 can be partially placed using the mounting gap 212, so that the end of the lead wire 12 can extend along the mounting gap 212 to the circuit board 3.

[0040] In some implementations, such as Figure 6 As shown, the coil assembly also includes a circuit board 3. The circuit board 3 is disposed on the surface of the first magnetic plate 2 facing away from the mounting plane 21. The lead 12 also includes a second connecting end 122, which extends toward the circuit board 3 and is electrically connected to the circuit board 3.

[0041] Specifically, the circuit board 3 has two pads located on the same side of the coil 1, and two leads 12 located on both sides of the coil body 11 and extending in a straight line to the two pads. This allows the lengths of the two leads 12 to be kept as consistent as possible, optimizing the connection between the leads 12 and the pads.

[0042] In an alternative implementation, the coil assembly in the above embodiments can be applied to a lens module. The lens module further includes a mounting part 4, an imaging part 5, a first lens 6, and a driving part 7. The mounting part 4 includes a movable base 41 and a fixed base 42. The imaging part 5 is disposed on the movable base 41. The first lens 6 is disposed on the fixed base 42.

[0043] The drive unit 7 includes a magnetic component 71 and the aforementioned coil component. One of the magnetic component 71 and the coil component is disposed on the movable base 41, and the other is disposed on the fixed base 42. The drive unit 7 is configured to use the magnetic field generated by the coil component to act on the magnetic component 71, thereby driving the imaging unit 5 to move closer to or away from the first lens 6.

[0044] In summary, in this embodiment, the lens module has two leads 12 disposed on the outer surface 112 of the coil body 11, and the first end face 111 of the coil body 11 disposed on the mounting plane 21 of the first magnetic plate 2. This prevents the leads 12 from interfering with the connection between the coil 1 and the first magnetic plate 2, avoiding the need for clearance grooves 23 on the mounting plane 21 to accommodate the leads 12. It also ensures that the thickness of each region of the first magnetic plate 2 is as consistent as possible, reducing the processing difficulty and cost of the first magnetic plate 2. Furthermore, each region of the first end face 111 of the coil body 11 can abut against the mounting plane 21, preventing gaps from forming between the coil body 11 and the mounting plane 21. Consequently, the induced magnetic field generated by the coil 1, together with the first magnetic plate 2, forms a driving magnetic field acting on the magnetic component 71, which helps the driving magnetic field to have a better magnetic field line distribution and improves the driving performance of the coil component.

[0045] Figure 7 This is a cross-sectional view of one side of the lens module in this embodiment. Figure 8 and Figure 9 This is a cross-sectional schematic diagram of the lens module in this embodiment.

[0046] In some implementations, such as Figures 8-9 As shown, the first end face 111 faces the side of the first lens 6. That is, the driving part 7 is disposed on the side of the fixed base 42, and the first end face 111 is perpendicular to the axis of the first lens 6. The mounting part 4 also includes two guide structures 43. The magnetic assembly 71 is disposed on the movable base 41 and located between the two guide structures 43. The movable base 41 moves along the axis of the first lens 6 via the two guide structures 43 (e.g., ...). Figure 8 (As indicated by the middle arrow a1).

[0047] Optionally, the guide structure 43 may include a guide rod and a guide hole. The guide rod is disposed on the fixed base 42, and the guide hole is disposed on the movable base 41, with the guide hole sleeved on the guide rod and sliding along the guide rod. This ensures that the imaging unit 5 can move along the optical path.

[0048] In some implementations, such as Figures 3-4 As shown, the movable base 41 has two first guide grooves 411. The fixed base 42 has two second guide grooves 421 respectively disposed opposite to the two first guide grooves 411. The mounting part 4 includes a plurality of balls 44, which form two ball sets 45 corresponding to the two first guide grooves 411 respectively. The ball sets 45 are rotatably disposed between the corresponding first guide groove 411 and the corresponding second guide groove 421, and the ball sets 45, the corresponding first guide groove 411 and the corresponding second guide groove 421 form a guide structure 43. This reduces the wear of the guide structure 43 during use, and ensures the relative positional accuracy of the first lens 6 and the imaging part 5 during long-term use of the lens module.

[0049] Optionally, both the first guide groove 411 and the second guide groove 421 are trapezoidal grooves, and the ball 44 contacts both trapezoidal grooves at the same time, which improves the guiding accuracy of the guide structure 43 for the moving seat 41.

[0050] Preferably, such as Figure 3 As shown, a first stop block 412 protrudes from one end of the first guide groove 411, and the first stop block 412 protrudes into the second guide groove 421. Figure 4 As shown, a second stop 422 protrudes from the end of the second guide groove 421 away from the first stop 412, and the second stop 422 protrudes towards the first guide groove 411. The first stop 412 and the second stop 422 can restrict the movement of the ball assembly 45 and prevent the ball 44 from sliding out between the first guide groove 411 and the second guide groove 421. At the same time, when the moving seat 41 moves a predetermined distance toward the first lens 6, the balls 44 at both ends of the ball assembly 45 will abut against the first stop 412 and the second stop 422 respectively, thereby limiting the movement stroke of the moving seat 41.

[0051] In some implementations, such as Figure 5 As shown, the magnetic assembly 71 includes two magnetic parts 711 arranged along the axial direction of the first lens 6. The side of the magnetic part 711 facing the first magnetic plate 2 is parallel to the mounting plane 21. The magnetic force of the magnetic part 711 acts on the first magnetic plate 2, causing the first guide groove 411 and the second guide groove 421 to abut against the ball 44. That is, the two magnetic parts 711 attract each other to the first magnetic plate 2, causing the movable seat 41 to move towards the coil assembly (e.g., ...). Figure 8 As indicated by the middle arrow a2, the center lines of the imaging unit 5 and the first lens 6 are aligned during the up-and-down movement of the movable seat 41. Furthermore, the magnetic force between the magnetic unit 711 and the first magnetic plate 2 reduces wear on the guide structure 43.

[0052] In some implementations, such as Figure 8 As shown, the magnetic component 71 also includes a second magnetic plate 712. The magnetic part 711 includes a first magnet 7131 and a second magnet 7132. The first magnet 7131 of one magnetic part 711 is attracted between the second magnet 7132 and the second magnetic plate 712, and the second magnet 7132 of the other magnetic part 711 is attracted between the first magnet 7131 and the second magnetic plate 712, and the polarities of the two first magnets 7131 are opposite.

[0053] Specifically, the south pole of the first magnet 7131 near the coil assembly faces the coil assembly, and the north pole of the second magnet 7132 near the coil assembly faces the coil assembly. The magnetic assembly 71 also includes a magnetically conductive block 713. The side of the magnetically conductive block 713 away from the coil assembly abuts against the second magnetically conductive plate 712, and the magnetically conductive block 713 is attracted between the two magnetic parts 711. In this embodiment, the two magnetic parts 711 can generate opposite magnetic fields, and the circuit board 3 can drive the movable base 41 to move up and down by controlling the coil body 11 to sense the magnetic field.

[0054] In some implementations, such as Figure 4 As shown, the first magnetic plate 2 has a central through hole 22, and its mounting plane 21 faces the magnetic assembly 71. Further referencing... Figure 3 As shown, in the circumferential direction of the central through hole 22, the first magnetic plate 2 includes two first plate bodies 231 and two second plate bodies 232. The two second plate bodies 232 are connected between the two first plate bodies 231, and the two first plate bodies 231 are arranged at intervals along the axial direction of the first lens 6. Further referring to... Figure 8 As shown, in the initial state, the two magnetic parts 711 of the drive unit 7 are respectively positioned opposite to the two first plates 231.

[0055] Specifically, the second plate 232 extends along the axial direction of the first lens 6. The first plate 231 and the second plate 232 are alternately arranged circumferentially around the central through hole 22, and the first plate 231 and the second plate 232 are perpendicularly connected. The central through hole 22 is a rounded rectangle. When the driving unit 7 is not driven, the two magnetic units 711 attract each other to the two first plates 231 respectively, allowing the movable base 41 and the imaging unit 5 to be stably suspended within the fixed base 42.

[0056] In some implementations, such as Figure 7 As shown, the mounting base 42 includes a top shell 461, a mounting plate 462, and a bottom shell 463. The top shell 461 covers the bottom shell 463, forming a receiving cavity between them. The movable base 41 and the mounting plate 462 are disposed in the receiving cavity. The first lens 6 is disposed in the mounting hole of the top shell 461. The coil assembly is fixedly connected to the mounting plate 462 via the circuit board 3.

[0057] The lens module also includes a flexible circuit board 8. The flexible circuit board 8 is disposed on the bottom shell 463 and includes a first connection area 81, a connecting arm 82, and a second connection area 83. The first connection area 81 is located on the side of the imaging unit 5 opposite to the first lens 6, and is electrically connected to and fixed together with the imaging unit 5. The second connection area 83 is located outside the accommodating cavity, and the imaging unit 5 is electrically connected to the control device outside the lens module through the second connection area 83 of the flexible circuit board 8. Simultaneously, when the moving base 41 moves upward, the imaging unit 5 moves the first connection area 81 upward along with it. In this configuration, the connecting arm 82 bends upward, generating a restoring elastic force to assist the moving base 41 in quickly resetting.

[0058] In some implementations, such as Figure 3 , Figure 4 and Figure 7 As shown, the mounting base 42 also includes a base frame 464, which has a first mounting surface 465 and a second mounting surface 466 facing away from each other. The second mounting surface 466 has a clearance area 467. The edge of the top shell 461 abuts against the first mounting surface 465, and the bottom shell 463 abuts against the second mounting surface 466. The clearance area 467 and the bottom shell 463 are spaced apart and form a clearance gap 468 on opposite sides. The base frame 464 is arranged around the first connecting area 81, the connecting arm 82, and at least part of the mounting plate 462, and the second connecting area 83 protrudes through the clearance gap 468. Thus, in this embodiment, the top shell 461 and the bottom shell 463 are connected by the base frame 464, and the second connecting area 83 is avoided by the clearance gap 468, so that the sealing effect of the receiving cavity is better and the light from the outside is prevented from entering the receiving cavity from the gap of the mounting base 42.

[0059] Specifically, such as Figure 7 As shown, the bottom frame 464 has a breakout 469, which avoids the communication interface on the second connection area 83, preventing interference between the bottom frame 464 and the communication interface. There are two connecting arms 82, which are curved and symmetrically arranged, and both connecting arms 82 connect to both the first connection area 81 and the second connection area 83 simultaneously. This increases the reset force generated by the connecting arms 82 and makes the direction of the reset force as consistent as possible with the axis of the first lens 6.

[0060] In some implementations, such as Figure 4 and Figure 7As shown, the base frame 464 includes at least one pad 4641. In the cross-sectional direction along the axis of the first lens 6, the first mounting surface 465 surrounds and is offset from the movable seat 41, and the pad 4641 is located inside the first mounting surface 465 and coincides with a portion of the movable seat 41 on the side away from the coil assembly. The configuration of the first mounting surface 465 in this embodiment can prevent it from colliding with the movable seat 41 when it moves downward. At the same time, using a pad 4641 away from the coil assembly to support the movable seat 41 prevents the movable seat 41 from tilting excessively when it moves downward.

[0061] Optionally, such as Figure 4 As shown, there are three pads 4641, with the other two pads 4641 located on both sides of the coil assembly to ensure that the imaging unit 5 moves along the axis of the first lens and prevents tilting.

[0062] Figure 9 This is a schematic diagram of the structure of the first magnetic plate 2 in other embodiments of this embodiment.

[0063] In other implementations, such as Figure 9 As shown, two clearance grooves 23 are formed on one surface of the first magnetic plate 2. The lead wire 12 extends from the first end face 111 near the inner side surface 113. In this configuration, the lead wire 12 is led out through the gap between the first end face 111 and the mounting plane 21, thus requiring the clearance groove 23 to be formed on one side of the plate. This allows one or both leads 12 to extend through the clearance groove 23 to the outer side of the coil body 11 (as shown by the dotted line in the figure).

[0064] It is easy to understand that Tables 1, 2, and 3 are simulation data of the magnetic force experienced by the first magnetic plate 2 under different conditions A. Condition A represents the first magnetic plate 2 without the clearance groove 23 (i.e., connected to the ring body 11 via the mounting plane 21). Condition B is... Figure 9 The first magnetic plate 2 is set with two clearance slots 23.

[0065] Table 1

[0066] Table 1 shows the values ​​(mN, millinewtons) of the driving force when the movable seat 41 is in different positions. This driving force is used to drive the imaging unit 5 closer to the first lens 6. As can be seen from the table, the driving force in form A is greater than that in form B.

[0067] Table 2

[0068] Table 2 shows the numerical values ​​(mN, millinewtons) of the attraction force when the movable seat 41 is in different positions. This attraction force is used to drive the first guide groove 411 and the second guide groove 421 to abut against the ball 44, ensuring that the imaging part 5 is always aligned with the center of the first lens 6 during the movement of the fixed seat 42. As can be seen from the table, form A increases the thickness of the first magnetic plate 2, making the attraction force of form A greater than that of form B, and the attraction force of form A is on average 7mN greater than that of form B.

[0069] Table 3

[0070] Table 3 shows the values ​​(mN, millinewtons) of the reset force when the movable seat 41 is in different positions. This reset force is used to drive the imaging unit 5 to move to the initial position. As can be seen from the table, the reset force of type A is smaller than that of type B. At the same time, the change in the reset force of type A is smaller during the movement stroke of the movable seat 41. Therefore, the movable seat 41 of type A is easier to drive and its movement is more stable.

[0071] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principle of this utility model should be included within the protection scope of this utility model.

Claims

1. A coil assembly, characterized in that, The coil assembly includes: A first magnetic plate includes a mounting plane and a central through hole, the mounting plane extending continuously; and A coil includes a coil body and two leads connected to the coil body. The coil body has a first end face, an outer side face, and an inner side face. The first end face is located between the outer side face and the inner side face. The outer side face extends circumferentially along the coil body and is opposite to the inner side face. The central through hole corresponds to the center of the coil body. The coil is connected to the mounting plane through the first end face, and the two leads extend from the outer side.

2. The coil assembly according to claim 1, characterized in that, The lead wire includes a first connecting end, two first connecting ends are located on both sides of the coil body, and the two first connecting ends are located on the outer side of the coil body near the mounting plane.

3. The coil assembly according to claim 2, characterized in that, The mounting plane has an outer edge; In the direction of the projection of the first magnetic plate, the outer side of the ring is located inside the outer edge, and the mounting plane is located in the area between the outer edge and the outer side to form a mounting gap; The first connecting end is attached to the outer side and extends along the installation gap.

4. The coil assembly according to claim 1, characterized in that, The coil assembly also includes: A circuit board is disposed on the surface of the first magnetic plate that is opposite to the mounting plane; The lead also includes a second connection end, which extends toward the circuit board and is electrically connected to the circuit board.

5. A lens module, characterized in that, The lens module includes: The mounting section includes a movable base and a fixed base; An imaging unit is disposed on the movable base; A first lens is mounted on the fixed base; and The driving unit includes a magnetic component and a coil assembly according to any one of claims 1-4, wherein one of the magnetic component and the coil assembly is disposed on the movable base and the other is disposed on the fixed base; The magnetic field generated by the coil assembly acts on the magnetic assembly to move the imaging unit closer to or away from the first lens.

6. The lens module according to claim 5, characterized in that, The first end face faces the side of the first lens; The mounting section also includes two guide structures: The magnetic component is disposed on the movable base and located between the two guide structures, and the movable base moves along the axial direction of the first lens via the two guide structures.

7. The lens module according to claim 6, characterized in that, The movable seat has two first guide grooves; The fixing seat has two second guide grooves respectively arranged opposite to the two first guide grooves; The mounting part includes a plurality of balls, which together form two ball sets corresponding to the two first guide grooves. The ball sets are rotatably disposed between the corresponding first guide groove and the corresponding second guide groove to form the guide structure.

8. The lens module according to claim 7, characterized in that, Both the first guide groove and the second guide groove are trapezoidal grooves; The trapezoidal groove of the movable seat is oriented opposite to the trapezoidal groove of the fixed seat, and the trapezoidal groove extends along the axial direction of the first lens.

9. The lens module according to claim 7, characterized in that, A first stop is provided at one end of the first guide groove, and the first stop protrudes into the second guide groove; The second guide groove has a second stop protruding at one end away from the first stop, and the second stop protrudes into the first guide groove; The movable seat moves a predetermined distance toward the first lens, and the balls at both ends of the ball assembly abut against the first stop and the second stop, respectively.

10. The lens module according to claim 7, characterized in that, The magnetic component includes two magnetic parts, which are arranged along the axial direction of the first lens; The side of the magnetic part facing the first magnetic plate is parallel to the mounting plane, and the magnetic force of the magnetic part acts on the first magnetic plate to drive the first guide groove and the second guide groove to abut against the ball.

11. The lens module according to claim 10, characterized in that, The magnetic component also includes a second magnetic plate; The magnetic part includes a first magnet and a second magnet. The first magnet of one magnetic part is attracted between the second magnet and the second magnetic plate, and the second magnet of the other magnetic part is attracted between the first magnet and the second magnetic plate. The polarities of the two first magnets are opposite.

12. The lens module according to claim 11, characterized in that, The magnetic component further includes a magnetically conductive block, the side of which is away from the coil component abuts against the second magnetically conductive plate, and the magnetically conductive block is attracted between the two magnetic parts.

13. The lens module according to claim 5, characterized in that, The fixed base includes a top shell, a mounting plate, and a bottom shell. The top shell covers the bottom shell and forms a receiving cavity. The top shell has a mounting hole. The movable base and the mounting plate are disposed in the receiving cavity, and the first lens is disposed in the mounting hole. The coil assembly is disposed on the mounting plate, and the magnetic assembly is disposed on the movable base.

14. The lens module according to claim 13, characterized in that, The lens module also includes a flexible circuit board disposed on the bottom shell. The flexible circuit board includes a first connection area, a connecting arm, and a second connection area. The first connection area is located on the side of the imaging unit away from the first lens. The first connection area is electrically connected to the imaging unit and fixed to it. The second connection area is located on the outside of the accommodating cavity. When the movable seat moves upward, the imaging unit moves the first connecting area upward together, and the connecting arm bends and generates a restoring elastic force.

15. The lens module according to claim 14, characterized in that, The mounting base also includes a base frame, the base frame having a first mounting surface and a second mounting surface that are opposite to each other, the second mounting surface having a clearance area; The edge of the top shell abuts against the first mounting surface, the bottom shell abuts against the second mounting surface, and the clearance area is spaced apart from the bottom shell and forms a clearance gap on opposite sides; The base frame is arranged around the first connecting area, the connecting arm, and at least part of the mounting plate, and the second connecting area extends through the avoidance gap.

16. The lens module according to claim 15, characterized in that, The bottom frame includes at least one pad block; In the cross-sectional direction along the first lens axis, the first mounting surface surrounds and is offset from the movable seat, and a pad is located inside the first mounting surface and overlaps with a portion of the movable seat on the side away from the coil assembly.

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