A voice coil motor and camera module

Abstract

The application discloses a voice coil motor and a camera module, which comprise a voice coil motor and a lens, the lens is arranged in the voice coil motor, and the voice coil motor is used for driving the lens to move; the application avoids the problem that the lens is prone to shaking when the traditional voice coil motor is powered off or the magnet disappears.

Description

Technical Field

[0001] This invention relates to the field of electronic control device technology, specifically to a voice coil motor and a camera module. Background Technology

[0002] With the increasing popularity of mobile communication devices and the rapid pace of technological innovation, consumers are becoming increasingly demanding in their requirements for mobile communication devices. Taking the camera installed on a mobile phone as an example, due to consumers' strong pursuit of high-quality photography functions, major mobile phone manufacturers are vying to develop and improve mobile phone cameras. The camera is mainly composed of a driving device, a lens, and an image sensor. As the name suggests, the lens is responsible for taking pictures and videos. The lens and image sensor are not the subject of this application and will not be discussed further here, but will be protected separately in other patents. The driving device (voice coil motor) is mainly responsible for extending and retracting the lens to achieve automatic focusing.

[0003] Currently, the Chinese patent database publishes a patent application with application number 202110252510.8, entitled "Voice Coil Motor, Camera, and Electronic Device." In this application's technical solution, when using a voice coil motor, energizing the coil assembly generates a first electromagnetic force between it and a magnetic component. This first electromagnetic force drives the coil assembly with the lens attached to move axially, achieving autofocus. Energizing the flat coil generates a second electromagnetic force between it and a magnetic component, driving the frame and causing the coil assembly with the lens attached to move along the XOY plane within the voice coil motor to counteract lens shake, thus achieving lens stabilization. This application, when energized, can stabilize the lens through magnetic force.

[0004] However, the problem with the voice coil motor in the aforementioned patent documents is that when the voice coil motor loses power and the magnetic force disappears, the frame will cause the flat coil and lens to return to their original position and experience a brief shaking. During the high-frequency, long-term, brief shaking process, the lens will inevitably be damaged and its service life will be reduced. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a voice coil motor and a camera module that avoids the problem that traditional voice coil motors are prone to lens shaking when power is off or magnetism is lost.

[0006] In a first aspect, the present invention discloses a voice coil motor, including a carrier, one end of which is used to connect to a lens, a coil being sleeved on the carrier, an upper spring and a lower spring being connected to the upper and lower parts of the carrier respectively, the upper spring being connected to a housing, and the lower spring being connected to a base, the housing and the base being detachably connected; at least one magnet is provided between the upper spring and the lower spring, and a terminal for electrical connection with the magnet is provided below the lower spring, the terminal being connected to an external driving chip; at least two limiting grooves are provided on the carrier, and at least two insert plates are formed on the housing, the insert plates corresponding to the limiting grooves one by one and slidingly adapted.

[0007] As the first optimization scheme of this application: two fixed electrodes are connected to one side of the terminal, and the two fixed electrodes are spaced apart along the moving direction of the carrier; the moving electrode is connected to the carrier, and the fixed electrodes are disposed on one side of the moving electrode; the moving electrode, the fixed electrodes and the external driving chip are electrically connected; the relative area of ​​the moving electrode and the fixed electrodes changes continuously as the moving electrode moves, and the driving chip controls the moving distance of the moving electrode in the focusing direction according to the capacitance signal formed by the moving electrode and the two fixed electrodes.

[0008] As a second optimization scheme for this application: First, one end of the lower spring is connected to the opposite surface of the carrier through a semi-open window structure, and an empty space is formed at the connection between the semi-open window structure and the lower spring; Second, the terminal and external driving chip are embedded inside the base.

[0009] As a third optimization of this application: a stepped contact portion is formed on the surface of the limiting groove that contacts the insert plate, the number of steps in the contact portion is at least three, and the insert plate contacts the middle step on the adjacent contact portion; the distance between the contact portion and the assembly hole is set to a preset value, and the preset value is based on the fact that the carrier does not break when the insert plate and the limiting groove come into contact.

[0010] As a further optimization of the third set of optimization schemes, a wiping mechanism is also included. The wiping mechanism includes a support body, one end of which is connected to an insert plate. A flip plate is hinged to the other end face of the support body adjacent to the contact part by a pin. The raised part of the flip plate is connected to one end of the support body by an elastic component and forms an acute angle. A dust removal component is connected to the flip plate and contacts the contact part opposite to the insert plate. A material collection trough is formed on the end face of the insert plate and is located below the dust removal component. A gradually narrowing slope is formed on the inlet edge of the material collection trough, and the inside of the material collection trough is provided with serpentine coiled blades.

[0011] As a further optimization of the third set of optimization schemes, a return mechanism is also included. The return mechanism includes a pin structure, a trigger structure, and a reset structure. An insertion space is formed on the hinged side below the flip plate. A pin structure is provided on one side of the insertion space and on the support body. A trigger structure and a reset structure are provided on one side of the pin structure and on the limiting groove, respectively.

[0012] First, the pin structure includes a limiting tube and a locking pin. The limiting tube is set on the slide block and on one side of the flip plate. The locking pin is slidably fitted inside the limiting tube and is directly opposite the insertion space of the flip plate. When the flip plate flips upward and the insertion space is raised to the height that the locking pin can enter, the locking pin is forced to enter the insertion space and lock. The flip plate drives the dust removal component to disengage from the limiting groove.

[0013] Second, the triggering structure includes a top plate and a vertical plate, which together form a pressure groove. The flip plate enters the pressure groove, and the top plate presses the flip plate to flip so that the insertion space meets the insertion conditions of the locking pin. Then the vertical plate pushes the locking pin into the insertion space to lock the flip plate.

[0014] Third, the reset structure includes a rod and a stop. The stop is located at the initial position of the limiting groove. During the process of the flap returning to the initial position, the stop blocks the rod, causing the locking pin to be pulled out of the insertion space.

[0015] Secondly, the present invention discloses a camera module, including the aforementioned voice coil motor, comprising the aforementioned voice coil motor and a lens, wherein the lens is disposed in the aforementioned voice coil motor, and the aforementioned voice coil motor is used to drive the lens to move.

[0016] The beneficial effects of this invention are as follows: First, because the limiting groove and the insert plate are mutually compatible, when the coil is not under the action of magnetic force, the carrier will return to its original position along the axis under the limiting action of the limiting groove and the insert plate. The disappearance of magnetic force on the coil will not cause the carrier to shake, and the lens attached to the carrier will not shake accordingly. Therefore, the lens will not shake for a long time and at high frequency, and the lens life will be greatly improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the carrier.

[0018] Figure 2 This is a bottom view of the carrier.

[0019] Figure 3 This is a three-dimensional structural diagram showing the assembly of the carrier, upper spring sheet, and coil into one unit.

[0020] Figure 4 This is a schematic diagram of the assembly structure of the carrier and the lower spring.

[0021] Figure 5 This is a three-dimensional structural diagram of the outer shell and base.

[0022] Figure 6 This is a schematic diagram of the upper spring, lower spring, and terminal.

[0023] Figure 7This is a schematic diagram of the combined structure of the terminal, external driver chip, and base.

[0024] Figure 8 This is a schematic diagram of the installation structure of the moving electrode.

[0025] Figure 9 This is a schematic diagram of the combination structure of the moving electrode and the fixed electrode.

[0026] Figure 10 for Figure 4 A magnified structural diagram at point A.

[0027] Figure 11 The diagram shown is a schematic of the assembly structure of the limiting groove and the insert plate.

[0028] Figure 12 This is a schematic diagram of the assembly structure of the wiping mechanism.

[0029] Figure 13 This is a schematic diagram of the cross-sectional structure of the improved insert plate.

[0030] Figure 14 This is a schematic diagram of the assembly structure of the pin structure, trigger structure, and reset structure.

[0031] Figure 15 This is a partial structural diagram of this application.

[0032] Figure 16 This is a schematic diagram showing the state of the flip plate 24 with the cancellation mechanism entering the departure structure.

[0033] Figure 17 This is a schematic diagram of the overall structure of this application.

[0034] In the diagram, the components are: carrier 1, assembly hole 2, channel 3, dispensing groove 4, limiting groove 5, connecting post 6, upper spring 7, lower spring 8, through groove 9, auxiliary hole 10, coil 11, outer shell 12, insert plate 13, base 14, locking post 15, magnet 16, terminal 17, external driving chip 18, fixed electrode plate 19, moving electrode plate 20, semi-open window structure 21, clearance area 22, wiping mechanism 23, support body 2301, dust removal component 2302, flip plate 24, collection trough 25, blade 26, pin structure 27, limiting tube 2701, locking post 2702, insertion space 2703, trigger structure 28, top plate 2801, upright plate 2802, reset structure 29, rod body 2901, stop 2902, and contact part 30. Detailed Implementation

[0035] To clearly understand the technical solution of this application, the following will provide a detailed description of a voice coil motor and camera module provided in this application, in conjunction with specific embodiments and accompanying drawings.

[0036] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” and “one or more” refer to one, two, or more than two.

[0037] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "one embodiment," "some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0038] Example 1 This embodiment provides a voice coil motor, including a carrier 1, reference... Figure 1 The diagram shows a three-dimensional structural schematic of the carrier 1. A mounting hole 2 for connecting to a lens is formed in the center of the carrier 1. An internal thread is formed on the inner wall of the mounting hole 2, which mates with the external thread on the lens. A channel 3 extends from the outer wall of the carrier 1, primarily for housing the coil 11. The channel 3 is composed of intermittent groove segments and the outer wall of the carrier 1. Figure 1 The gap (h) formed between the two dotted lines a and b is channel 3; four glue-dispensing grooves 4 are evenly spaced on the upper surface of the carrier 1. The function of the glue-dispensing grooves 4 is to inject glue into the glue-dispensing grooves 4 and attach the carrier 1 and the upper spring piece 7 together when they are connected; four limiting grooves 5 are evenly spaced on the peripheral sidewall of the carrier 1, mainly used to form a limiting relationship with the surface of the outer shell 12 later. Reference Figure 2 The diagram shows the bottom of the carrier 1. Four connecting posts 6 are formed at equal intervals on the bottom surface of the carrier 1. The connecting posts 6 are mainly used to connect with the lower spring 8.

[0039] Among them, reference Figure 3The diagram shows a three-dimensional structure of the carrier 1, upper spring sheet 7, and coil 11 assembled together. The four inner ends of the upper spring sheet 7 are respectively connected to the four adhesive grooves 4 on the carrier 1 (in this embodiment, adhesive bonding is preferred, or other connection methods such as welding are also used). The upper spring sheet 7 has four outer ends, which are mainly used to connect with the outer shell 12. To further improve the connection strength between the carrier 1 and the upper spring sheet 7, a through groove 9 adapted to the adhesive groove 4 is formed on the inner end. On the other hand, six auxiliary holes 10 are drilled around the through groove 9. During use, glue is sequentially dripped into the adhesive groove 4, through groove 9, and auxiliary holes 10 to ensure the connection between the carrier 1 and the upper spring sheet 7. The through groove 9 and auxiliary holes 10 on the surface of the upper spring sheet 7 can reduce its weight to a certain extent. Figure 3 As can be seen, coil 11 is wound and adhered to within channel 3. (Reference) Figure 4 The diagram shows the assembly structure of the carrier 1 and the lower spring 8. The inner side of the lower spring 8 forms four inner connecting parts, which are respectively connected to the four connecting posts 6 on the carrier 1 (in this embodiment, adhesive is used, and auxiliary holes 10 are provided on the inner connecting surface to make the connection between the lower spring 8 and the carrier 1 more secure). The outer side of the lower spring 8 forms four outer connecting parts, which are mainly used to connect with the base 14.

[0040] Among them, such as Figure 5 As shown, a three-dimensional structural schematic diagram of the outer shell 12 and the base 14 is presented. A first through hole is formed in the center of the outer shell 12. Four insert plates 13 are formed in a circular array along the edge of the first through hole. The four insert plates 13 correspond to and fit into four limiting grooves 5 respectively. The inner corners of the outer shell 12 are connected to the outer ends of the corresponding upper spring pieces 7 (see reference). Figure 5 (The structure is shown above). The bottom of the outer casing 12 is connected to a base 14. The base 14 mainly supports and fixes the components in the outer casing 12. A second through hole is formed in the center of the base 14, and a pair of locking pins 15 are formed on each of the four corners of the base 14. Each pair of locking pins 15 is connected to the outer part of the lower spring piece 8 (see reference). Figure 5 The structure shown below is in the image.

[0041] in, Figure 6 The diagram shown is a structural schematic of the upper spring 7, the lower spring 8, and the terminal 17. Figure 6 As shown in Figure A, four magnets 16 are respectively provided at the four corners between the upper spring 7 and the lower spring 8, and a terminal 17 is provided below the lower spring 8. Figure 6As shown in Figure B, the lower corner of the upper spring piece 7 is bonded to the upper surface of its corresponding magnet 16, and the upper corner of the lower spring piece 8 is bonded to the lower surface of its corresponding magnet 16. An external drive chip 18 is electrically connected to the upper part of the terminal 17, and the external drive chip 18 is electrically connected to the four magnets 16. The magnets 16, the terminal 17, and the external drive chip 18 together constitute the lifting module. In use, under the action of the external drive chip 18, the magnets 16 and the coil 11 are energized and generate electromagnetic force. The electromagnetic force drives the coil 11 to move axially (axial direction is...). Figure 6 As shown in the z direction, the carrier 1 with the lens attached is indirectly moved along the z direction, thereby enabling the lens to focus; after the magnetic force disappears, the upper spring 7 and the lower spring 8 can still drive the carrier 1 with the lens attached to return to its original position.

[0042] Since the limiting groove 5 and the insert plate 13 are mutually adapted, when the coil 11 is not under the action of magnetic force, the carrier 1 will return to its original position along the axis under the limiting action of the limiting groove 5 and the insert plate 13. The disappearance of magnetic force on the coil 11 will not cause the carrier 1 to shake, and the lens attached to the carrier 1 will not shake accordingly. Therefore, the lens will not shake for a long time and at high frequency, and the service life of the lens will be greatly improved.

[0043] Example 2 As a further optimized implementation scheme of Example 1, refer to Figure 7 The diagram shows a combination structure of terminal 17, external driver chip 18, and base 14. By embedding terminal 17 and external driver chip 18 inside base 14, the installation space inside housing 12 is saved to a certain extent, thereby enabling the overall structure of voice coil motor to be miniaturized, so that voice coil motor can be installed in a small space, making it more practical.

[0044] Example 3 As a further optimized implementation scheme of Example 1, see [link to example]. Figure 6 and Figure 7 Two fixed electrode plates 19 are connected to one side of terminal 17, and the two fixed electrode plates 19 are spaced apart along the moving direction of carrier 1; Reference Figure 8 The diagram shows the installation structure of the moving electrode 20. The moving electrode 20 has a positioning hole, and the carrier 1 has a positioning post. The positioning hole and the positioning post are connected in a sleeve connection (in actual installation, adhesive is applied between the positioning hole and the positioning post). (Reference) Figure 9The diagram shows a schematic of the working structure of the moving electrode 20 and the fixed electrode 19. The fixed electrode 19 is disposed on one side of the moving electrode 20. The moving electrode 20, the fixed electrode 19 and the external driving chip 18 are electrically connected. In use, when the carrier 1 moves, it will drive the moving electrode 20 to move along the axial direction. The relative area of ​​the moving electrode 20 and the fixed electrode 19 changes continuously with the movement of the moving electrode 20. The driving chip controls the moving distance of the moving electrode 20 in the focusing direction (i.e., the axial direction) according to the capacitance signal formed by the moving electrode 20 and the two fixed electrodes 19, thereby avoiding the situation where the moving electrode 20 drives the carrier 1 with the lens attached to collide with the outer shell 12. This application avoids damage to components such as the lens, the moving electrode 20 and the carrier 1 to the greatest extent and reduces the cost of enterprises.

[0045] Example 4 As a further optimized implementation scheme of Example 1, refer to Figure 10 This indicates Figure 4 The enlarged structural diagram at point A shows that a semi-open window structure 21 is formed on one side of the outer part of the lower spring 8. The semi-open window structure 21 is bonded to the opposite surface of the carrier 1. An air-avoiding interval 22 is formed at the connection between the semi-open window structure 21 and the lower spring 8. By combining the lower spring 8 and the semi-open window structure 21, space can be saved. On the other hand, when the lower spring 8 is soldered to the carrier 1 with solder paste, the solder paste is prone to climb towards the inside of the carrier 1 due to its rheological properties, which may cause the solder paste to damage components such as the lens. This application can effectively prevent the solder paste from flowing towards the inside of the carrier 1 by using the design of the semi-open window structure 21.

[0046] Example 5 During the process of limiting the carrier 1 by the limiting groove 5 and the insert plate 13, friction will occur between the insert plate 13 and the limiting groove 5 on the carrier 1, which will cause particles such as fine dust or small objects to be generated on the limiting groove 5. These particles will accumulate on the lens, thereby degrading the image or video display quality generated by the lens. Therefore, this embodiment has made a completely new design based on the limiting groove 5 and the insert plate 13, and the specific solution is as follows.

[0047] refer to Figure 11The diagram shows the assembly structure of the limiting groove 5 and the insert plate 13. Stepped contact portions 30 are formed on both sides of the limiting groove 5. In this embodiment, the number of steps in the contact portions 30 is three. After the insert plate 13 is placed in the limiting groove 5, the two side surfaces of the insert plate 13 contact the middle step on the adjacent contact portion 30, minimizing the contact area between the surface of the limiting groove 5 and the insert plate 13, thereby reducing the amount of particles generated at the source. On the other hand, considering that the carrier 1 is mostly injection molded, the distance (L) between the contact portion 30 and the first through hole is set to a preset value. This preset value is based on the premise that the carrier 1 does not break when the insert plate 13 and the limiting groove 5 are in contact (the specific preset value is not disclosed here but will be protected in other patents). In use, when the external driving chip 18 de-energizes the magnet 16, the magnetic force exerted by the magnet 16 on the coil 11 disappears, and the carrier 1 returns to its original position under the action of the upper spring 7 and the lower spring 8. During this return, the carrier 1 moves axially to its original position due to the limiting effect of the limiting groove 5 and the insert plate 13, without any shaking. Simultaneously, due to the special stepped design (at least three steps) of the contact portion 30 on the limiting groove 5, the contact area between the insert plate 13 and the limiting groove 5 is reduced, thus reducing the amount of particles generated after the insert plate 13 contacts the limiting groove 5. Therefore, based on Embodiment 1, this embodiment can ensure that the carrier 1, which is not limited by magnetic force, returns axially without shaking, while simultaneously minimizing or suppressing the generation of fine dust and other particles during the movement of the carrier 1.

[0048] Furthermore, although the contact method between the contact portion 30 of the limiting groove 5 and the insert plate 13 can minimize the reduction of particles, a small amount of particles will still be generated. In order to prevent these small particles from drifting onto the lens, as an optimization solution of this embodiment, a wiping mechanism 23 is further designed, and the specific solution is as follows.

[0049] refer to Figure 12The figure shows a schematic diagram of the assembly structure of the wiping mechanism 23. As shown, the wiping mechanism 23 is connected to one side of the insert plate 13. The wiping mechanism 23 includes a support body 2301. One end of the support body 2301 is connected to the insert plate 13. A flip plate 24 is hinged to the other end face of the support body 2301 adjacent to the contact part 30 by a pin. The raised part of the flip plate 24 is connected to the top of the support body 2301 by an elastic member at an acute angle (α). Here, the elastic member is a spring. A dust removal component 2302 is connected to the top of the flip plate 24. The dust removal component 2302 is L-shaped. The two arms of the dust removal component 2302 respectively contact and adapt to the two sides of the contact part 30 opposite to the insert plate 13 (Note: The material of the dust removal component 2302 is a flexible material, such as cloth). In use, the movement of the insert plate 13 correspondingly drives the wiping mechanism 23 to move. The moving wiping mechanism 23 uses its dust-removing component 2302 to wipe and remove dust from the contact portion 30. The elastic component on the wiping mechanism 23 provides a certain degree of cushioning for the dust-removing component 2302. On the other hand, during the wiping process, particles on the contact portion 30 are removed. At this point, the problem of particle collection becomes a pressing issue; therefore, see [link to relevant documentation]. Figure 12 , 13 ,in, Figure 13 The diagram shows the cross-sectional structure of the improved insert plate 13. A collection trough 25 is formed on both sides of the insert plate 13. The collection trough 25 is located below the dust removal component 2302. In order to ensure that the particles fall smoothly into the collection trough 25, the inlet edge of the collection trough 25 has a gradually narrowing slope. The inside of the collection trough 25 is provided with a serpentine coiled blade 26. Particles can enter the inside of the collection trough 25 along the surface of the blade 26. The serpentine coiled blade 26 can prevent the particles entering the collection trough 25 from flowing out in the opposite direction.

[0050] When the wiping mechanism 23 moves upward along the contact portion 30, a slight amount of dust is emitted upward. Therefore, a return mechanism for the wiping mechanism 23 is further designed. The return mechanism includes a pin structure 27 on the support body 2301, a trigger structure 28 on the limiting groove 5, and a reset structure 29 on the limiting groove 5. (See reference...) Figure 14 The diagram shows the assembly structure of the pin structure 27, the trigger structure 28, and the reset structure 29. An insertion space 2703 is formed on the hinge side below the flip plate 24. The pin structure 27 is provided below the insertion space 2703 and on the support body 2301. The trigger structure 28 and the reset structure 29 are provided below the pin structure and on the limiting groove 5, respectively. The specific design scheme is as follows.

[0051] Figure 15The diagram shown is a partial structural schematic of this application. As can be seen from the diagram, the pin structure includes a limiting tube 2701 and a locking pin 2702. The limiting tube 2701 is disposed on the surface of the support 2301 and below the flip plate 24. A cylindrical locking pin 2702 is slidably fitted inside the limiting tube 2701. The locking pin 2702 is directly opposite the insertion space 2703 below the flip plate 24. When the flip plate 24 flips upward and the insertion space 2703 is raised to a sufficient height, the locking pin 2702 is forced into the insertion space 2703 and locked. (Continue to refer to...) Figure 15 The trigger structure 28 is L-shaped and includes a top plate 2801 and a vertical plate 2802, which together form a pressure groove.

[0052] refer to Figure 16 ( Figure 16 (This is a schematic diagram of the state of the flip plate 24 with the cancellation mechanism entering the launching structure). When the flip plate 24 gradually enters the pressing groove from top to bottom, the pin side of the flip plate 24 enters the pressing groove first. During the entry process, the top plate 2801 of the pressing groove gradually contacts the flip plate 24 and flips it upward (pressing along the b direction). During the flipping process, the raised part of the flip plate 24 flips until the dust removal component 2302 connected to the flip plate 24 disengages from the limiting groove 5, and the height of the insertion space 2703 below the flip plate 24 meets the requirements for the locking pin 2702 to enter. After that, the locking pin 2702 gradually contacts the upright plate 2802 of the pressing groove (pressing along the c direction). The upright plate 2802 pushes the locking pin 2702 into the insertion space 2703 of the flip plate 24, locking the flip plate 24 in this state.

[0053] Among them, see Figure 16 The reset structure 29 includes a rod 2901, which is disposed on the side end of the locking pin 2702; see also Figure 15 The insertion plate 13 has a stop 2902 on one side of the limiting groove 5 for abutting against the rod 2901. When the flip plate 24 returns to the upper part of the limiting groove 5 (initial position), it passes the stop 2902, which blocks the rod 2901. The flip plate 24 continues to move forward until the locking pin 2702 is completely disengaged from the insertion space 2703 of the flip plate 24. The flip plate 24 returns to the initial state, and the dust removal component 2302 is correspondingly attached to the limiting groove 5 again.

[0054] This application combines the pin structure 27, trigger structure 28, and reset structure 29. When the insert plate 13 drives the wiping mechanism 23 to move downward, the pin structure 27, trigger structure 28, and reset structure 29 do not interact until the insert plate 13 drives the wiping mechanism 23 to move below the limiting groove 5. At this point, the trigger structure 28 acts on the pin structure 27 to disengage the wiping mechanism 23 from the limiting groove 5. When the insert plate 13 drives the wiping mechanism 23 to move upward, since the wiping mechanism 23 is disengaged from the limiting groove 5, it will not sweep the particles upward, thus suppressing the upward dispersion of particulate dust. This prevents the particles from affecting the lens even when only a small amount of particulate dust is generated.

[0055] Furthermore, the bottom of the collection tank 25 is provided with a viscous synthetic resin for collecting particles; preferably, the viscous synthetic resin and selective viscous epoxy resin (existing products, which will not be described here and are not shown in the figure).

[0056] Example 6 This embodiment provides a camera module, which includes the aforementioned voice coil motor and a lens (not shown in the figure). The lens is disposed in the aforementioned voice coil motor, and the voice coil motor is used to drive the lens to move.

Claims

1. A voice coil motor, characterized in that: Includes a carrier (1), one end of which is used to connect to a lens. A coil (11) is fitted on the carrier (1). An upper spring (7) and a lower spring (8) are connected to the upper and lower parts of the carrier (1), respectively. The upper spring (7) is connected to the outer shell (12), and the lower spring (8) is connected to the base (14). The outer shell (12) and the base (14) are detachably connected. At least one magnet (16) is provided between the upper spring (7) and the lower spring (8). A terminal (17) for electrical connection with the coil (11) is provided below the lower spring (8). The terminal (17) is connected to an external driving chip (18). At least two limiting grooves (5) are provided on the carrier (1), and at least two insert plates (13) are formed on the outer shell (12). The ) corresponds one-to-one with the limiting groove (5) and slides to fit; it also includes a wiping mechanism (23), wherein the wiping mechanism (23) includes a support body (2301), one end of the support body (2301) is connected to the insert plate (13), and the other end face of the support body (2301) adjacent to the contact part (1301) on the limiting groove (5) is hinged to a flip plate (24) by a pin shaft, and the raised part of the flip plate (24) is connected to one end of the support body (2301) by an elastic component and forms an acute angle; a dust removal component (2302) is connected to the flip plate (24), and the dust removal component (2302) contacts the contact part (1301) opposite to the insert plate (13); it also includes a return mechanism, wherein the return mechanism includes a pin structure (27), a contact The flip plate (24) has a trigger structure (28) and a reset structure (29). An insertion space (2703) is formed on the hinged side below the flip plate (24). A pin structure is provided on one side of the insertion space (2703) and on the support body (2301). A trigger structure (28) and a reset structure (29) are provided on one side of the pin structure and on the limiting groove (5). The pin structure includes a limiting tube (2701) and a locking pin (2702). The limiting tube (2701) is set on one side of the support body (2301) and the flip plate (24). The locking pin (2702) is slidably adapted in the limiting tube (2701). The locking pin (2702) is directly opposite the insertion space (2703) of the flip plate (24). When the flip plate (24) flips upward and the insertion space (2703) is inserted into the pin, the pin structure is triggered. When the height is raised to the height that the locking pin (2702) can enter, the locking pin (2702) is forced to enter the insertion space (2703) and lock. The flip plate (24) drives the dust removal component (2302) to disengage from the limiting groove (5). The trigger structure (28) includes a top plate (2801) and a vertical plate (2802). The top plate (2801) and the vertical plate (2802) together form a pressing groove. The flip plate (24) enters the pressing groove. The top plate (2801) presses the flip plate (24) to flip so that the insertion space (2703) meets the insertion conditions of the locking pin (2702). Then the vertical plate (2802) pushes the locking pin (2702) into the insertion space (2703) and locks the flip plate (24).The reset structure (29) includes a rod (2901) and a stop (2902). The stop (2902) is located in the initial position of the limiting groove (5). During the process of the flip plate (24) returning to the initial position, the stop (2902) blocks the rod (2901), causing the locking pin (2702) to be pulled out from the insertion space (2703).

2. The voice coil motor according to claim 1, characterized in that: Two fixed electrodes (19) are connected to one side of the terminal (17). The two fixed electrodes (19) are spaced apart along the moving direction of the carrier (1). The moving electrode (20) is connected to the carrier (1). The fixed electrodes (19) are located on one side of the moving electrode (20). The moving electrode (20) and the fixed electrodes (19) are electrically connected to the external driving chip (18). The relative area of ​​the moving electrode (20) and the fixed electrodes (19) changes continuously as the moving electrode (20) moves. The driving chip controls the carrier (1) to move the moving electrode (20) in the focusing direction according to the capacitance signal formed by the moving electrode (20) and the two fixed electrodes (19).

3. The voice coil motor according to claim 1, characterized in that: One end of the lower spring (8) is connected to the opposite side of the carrier (1) through a semi-open window structure (21), and a clearance interval (22) is formed at the connection between the semi-open window structure (21) and the lower spring (8); the terminal (17) is embedded in the interior of the base (14), and the external driving chip (18) is set outside the base (14) and electrically connected to the terminal (17).

4. The voice coil motor according to claim 1, characterized in that: The limiting groove (5) that contacts the insert plate (13) has a stepped contact portion (1301) formed on its surface. The number of steps in the contact portion (1301) is at least three. The insert plate (13) contacts the middle step on the adjacent contact portion (1301). The distance between the contact portion (1301) and the assembly hole (2) is set to a preset value, and the preset value is based on the fact that the carrier (1) does not break when the insert plate (13) and the limiting groove (5) make contact.

5. The voice coil motor according to claim 4, characterized in that: A material collection trough (25) is formed on the end face of the insert plate (13), and the material collection trough (25) is located below the dust removal component (2302); a gradually narrowing slope is formed on the inlet edge of the material collection trough (25), and a serpentine coiled blade (26) is provided inside the material collection trough (25).

6. A camera module, characterized in that: The system includes a voice coil motor as described in any one of claims 1 to 5, wherein a lens is disposed within the voice coil motor, and the voice coil motor is used to drive the lens to move.

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