Dustproof motor

Abstract

The utility model discloses a dustproof motor, which comprises a motor body and an electrostatic adsorption mechanism arranged on the motor body and used for adsorbing small particles in the motor body. The electrostatic adsorption mechanism comprises a conductive unit and a dust sticking unit covering the surface of the conductive unit. According to the utility model, through the synergistic effect of active electrostatic adsorption and passive dust-sticking fixation, the limitation of the traditional motor dust-proof technology is broken through, the POG imaging problem caused by the fact that small particles fall on a BG is avoided, and the imaging quality and the reliability of the camera module are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera module technical field, especially relate to a dustproof motor. BACKGROUND

[0002] With the rapid development of mobile terminal image technology, AF (automatic focusing) camera module has become the core component of intelligent equipment. The middle motor is widely used in AF camera module because of high space utilization rate, fast focusing response and other advantages. However, the structure of the existing middle motor does not have a dust ring design, resulting in many external dust particles or carrier debris generated by the impact of the motor and the lens movement moving to the BG (image sensor protection glass), causing POG (glass surface attached particles, forming black spots, light spots or artifacts in imaging) imaging problem. POG problem not only affects the performance and stability of the camera module, but also may reduce user experience.

[0003] Therefore, it is urgent to design a new type of motor to prevent dust and debris from falling on the BG during the working process of the camera module to strictly control the POG risk of the module. UTILITY MODEL CONTENT

[0004] In view of the above technical problems of the prior art, the utility model solves the technical problems: to provide a dustproof motor capable of avoiding POG imaging problem.

[0005] In order to solve the above technical problems, one technical scheme of the utility model is: a dustproof motor is provided, which comprises a motor body and an electrostatic adsorption mechanism arranged on the motor body and used for adsorbing small particles in the motor body. The electrostatic adsorption mechanism comprises a conductive unit and a dust sticking unit covering the surface of the conductive unit.

[0006] Further, the conductive unit comprises a first conductive part and a second conductive part, the first conductive part is connected to the positive electrode of the power supply, and the second conductive part is connected to the negative electrode of the power supply. The dust sticking unit comprises a first dust sticking part covering the surface of the first conductive part and a second dust sticking part covering the surface of the second conductive part.

[0007] Further, the first conductive part and the second conductive part can be made of steel, aluminum or copper material with conductive property.

[0008] The first dust sticking part and the second dust sticking part can be configured as conductive dust sticking glue coated on the surface of the corresponding conductive part.

[0009] Further, the first conductive part is electrically connected to the positive electrode of the power supply through a positive electrode pin, and the second conductive part is electrically connected to the negative electrode of the power supply through a negative electrode pin.

[0010] Further, the motor body comprises a housing assembly and a motor assembly arranged in the housing assembly, and the electrostatic adsorption mechanism is arranged at a position close to the outer edge of the bottom of the housing assembly.

[0011] The motor assembly and the bottom of the housing assembly have an inner space, the first and second conductive parts are arranged in the inner space, the first gap between the motor assembly and the lens assembly is communicated with the inner space, and the first and second conductive parts are used for adsorbing the fine particles reaching the inner space through the first gap.

[0012] Further, the motor assembly and the housing have a second gap, the second gap is communicated with the inner space, and the first and second conductive parts are also used for adsorbing the fine particles reaching the inner space through the second gap.

[0013] Further, the first dust sticking part is arranged on a side of the first conductive part facing the inner space, and the second dust sticking part is arranged on a side of the second conductive part facing the inner space.

[0014] Further, the housing assembly comprises a base and a shell covering the base, the base comprises a bottom wall and side walls erected at edge positions of the bottom wall, the side walls are connected end to end and surround the bottom wall and the bottom of the motor assembly to form the inner space.

[0015] The first and second conductive parts are arranged on sides of two opposite side walls facing the inner space, respectively.

[0016] Further, the shell, the motor assembly and the base are coaxially provided with a first through hole, a second through hole and a third through hole penetrating along the optical axis direction, respectively, the lens assembly is arranged in the first through hole and the second through hole, and the gap between the lens assembly and the hole wall of the first and second through holes constitutes the first gap.

[0017] Further, the gap between the motor assembly and the hole wall of the first through hole constitutes the second gap.

[0018] The dustproof motor has at least the following beneficial effects: the dustproof motor has the innovative integrated electrostatic adsorption and dust-sticking adhesive double dustproof mechanism, completely blocks the path of the migration of the tiny particles to the BG, eliminates the black spots, light spots and artifacts, ensures the imaging purity, solves the POG imaging problem, improves the optical performance, covers the key gap (the first gap / the second gap) in the motor, can not only capture the external dust invading through the gap between the lens assembly and the motor assembly in real time, but also synchronously adsorb the carrier scraps generated by the movement collision, the electrostatic adsorption mechanism is simple in structure and integrated in the inner space of the motor base, maximizes the space utilization, does not increase the additional volume, and meets the compact design requirement of the mobile terminal. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present application, form a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a whole structure schematic view of the embodiment of the dustproof motor of the utility model.

[0021] Figure 2 It is a top view of the embodiment of the dustproof motor of the utility model.

[0022] Figure 3 It is Figure 2 The sectional view of A-A.

[0023] Figure 4 It is a structure schematic view of the base in the embodiment of the dustproof motor of the utility model.

[0024] Figure 5 It is the assembly drawing of the base and the electrostatic adsorption mechanism in the embodiment of the dustproof motor of the utility model.

[0025] Figure 6 It is the sectional view of the assembly of the base and the conductive unit in the embodiment of the dustproof motor of the utility model.

[0026] Figure 7 It is the assembly drawing of the base and the motor assembly in the embodiment of the dustproof motor of the utility model.

[0027] Figure 8 It is a structure schematic view of the motor assembly in the embodiment of the dustproof motor of the utility model.

[0028] Figure 9 It is a structure schematic view of the shell in the embodiment of the dustproof motor of the utility model.

[0029] The meanings of the reference numbers in the drawings are as follows:

[0030] The motor body 1, the shell assembly 11, the base 111, the bottom wall 1111, the third through hole 1111a, the support table 1111b, the first protrusion 1111c, the side wall 1112, the positioning column 1112a, the first recess 1112b, the second recess 1112c, the positive electrode pin 1113, the negative electrode pin 1114, the shell 112, the top plate 1121, the first through hole 1121a, the side plate 1122, the first notch 1122a, the motor assembly 12, the second through hole 121, the first elastic sheet 122, the positioning hole 1221, the second elastic sheet 123, the carrier 124, the coil 125, the magnet 126, the inner empty space 13;

[0031] The electrostatic adsorption mechanism 2, the conductive unit 21, the first conductive part 211, the first dust adsorption part 2111, the first connecting part 2112, the second conductive part 212, the second dust adsorption part 2121, the second connecting part 2122, the dust sticking unit 22, the first dust sticking part 221, the second dust sticking part 222. DETAILED DESCRIPTION

[0032] The utility model will be further described below in combination with the drawings.

[0033] In this paper, the structure shown in the drawings is exemplarily described for the dustproof motor, so as to more clearly show the various components and cooperation relationship of the dustproof motor. Figures 1 to 9 It should be understood that, although the dustproof motor shown in the drawings is described in detail as an example below, this example does not limit the scope of the dustproof motor of the utility model, and the remaining components can be regarded as non-essential technical elements except for the components necessary to solve the technical problems of the utility model.

[0034] Please see Figures 1 to 4 The dustproof motor comprises a motor body 1 and an electrostatic adsorption mechanism 2 arranged on the motor body 1 and used for adsorbing the fine particles in the motor body 1.

[0035] The motor body 1 can be any known motor body structure, which includes a housing assembly 11 and a motor assembly 12 disposed in the housing assembly 11. The housing assembly 11 can be configured to include a base 111 and a cover 112 covering the base 111. To facilitate the installation of the electrostatic suction mechanism 2, the base 111 can be configured to include a bottom wall 1111 and side walls 1112 erected at each edge position of the bottom wall 1111. The side walls 1112 are connected end to end and enclose the bottom wall 1111 and the bottom of the motor assembly 12 to form an inner space 13. The bottom wall 1111 is provided with a third through hole 1111a penetrating in the optical axis direction. The outer side of the bottom wall 1111 of the base 111 is outwardly protruding to form a support table 1111b. The support table 1111b is provided with a plurality of first protrusions 1111c. The corners of the base 111 are provided with a plurality of positioning columns 1112a, which are formed by the side wall 1112 near the motor assembly 12 and protrude towards the motor assembly 12. It should be understood that the structure of the base 111 is not limited to the above specific embodiment. In different embodiments, the base 111 can also be directly configured as a plate structure or be adapted to different embodiments.

[0036] Two power supply pins are respectively provided at any two corners of the base 111, which are a positive pin 1113 and a negative pin 1114. The corner provided with the positive pin 1113 is recessed to form a first recess 1112b towards the positive pin 1113. The corner provided with the negative pin 1114 is recessed to form a second recess 1112c towards the negative pin 1114. The inner end of the positive pin 1113 is embedded in the base 111, and the outer end is connected to the positive pole of the power supply. The inner end of the negative pin 1114 is embedded in the base 111, and the outer end is connected to the negative pole of the power supply. In this embodiment, the power supply connected by the positive pin 1113 and the negative pin 1114 is the main power supply of the camera.

[0037] Please refer to Figures 4 to 6The electrostatic adsorption mechanism 2 is arranged in the inner space 13, and includes a conductive unit 21 and a dust sticking unit 22 covering the surface of the conductive unit 21. The conductive unit 21 includes a first conductive part 211 and a second conductive part 212, which are respectively arranged on one side of two opposite side walls 1112 facing the inner space 13. The first conductive part 211 is electrically connected to the positive pole of the power supply through the positive pole pin 1113, and the second conductive part 212 is electrically connected to the negative pole of the power supply through the negative pole pin 1114. The first conductive part 211 and the second conductive part 212 are fixedly connected to the side wall 1112 on one side close to the side wall 1112, and are embedded in the bottom wall 1111 on one end close to the bottom wall 1111 to be more firmly combined with the base 111. The first conductive part 211 includes a first dust adsorption part 2111 and a first connecting part 2112 electrically connected to the positive pole pin 1113, which is protruded from one end of the first dust adsorption part 2111 close to the corner where the positive pole pin 1113 is located to the direction of the positive pole pin 1113, and is matched with the first recess 1112b. The second conductive part 212 includes a second dust adsorption part 2121 and a second connecting part 2122 electrically connected to the negative pole pin 1114, which is protruded from one end of the second dust adsorption part 2121 close to the corner where the negative pole pin 1114 is located to the direction of the negative pole pin 1114, and is matched with the second recess 1112c. In this embodiment, the first connecting part 2112 and the positive pole pin 1113, and the second connecting part 2122 and the negative pole pin 1114 are all welded together by laser.

[0038] It should be understood that the first conductive part 211 and the second conductive part 212 are both made of materials with good electrical conductivity, such as steel, aluminum, copper, alloy and the like with electrical conductivity, and in this embodiment, the first conductive part 211 and the second conductive part 212 are both configured as steel sheets.

[0039] The dust sticking unit 22 includes a first dust sticking part 221 covering the surface of the first conductive part 211 and a second dust sticking part 222 covering the surface of the second conductive part 212. The first dust sticking part 221 is arranged on one side of the first conductive part 211 facing the inner space 13, and the second dust sticking part 222 is arranged on one side of the second conductive part 212 facing the inner space 13. The first dust sticking part 221 and the second dust sticking part 222 can be configured as insulating dust sticking glue or conductive dust sticking glue coated on the surface of the corresponding conductive part, and in this embodiment, the first dust sticking part 221 and the second dust sticking part 222 are configured as conductive dust sticking glue to optimize the adsorption effect of the fine particles.

[0040] Please refer to Figure 7 With Figure 8 , the motor assembly 12 has a second through hole 121 coaxially arranged with the first through hole 1121a and the third through hole 1111a. The motor assembly 12 includes a first elastic sheet 122, a second elastic sheet 123, a carrier 124 arranged between the first elastic sheet 122 and the second elastic sheet 123, a coil 125 arranged outside the carrier 124, and a plurality of magnets 126 arranged around the carrier 124, which are sequentially arranged in the optical axis direction from the upper surface of the base 111 upwards. The motor assembly 12 is arranged directly above the base 111, and a positioning hole 1221 is arranged at a position corresponding to the positioning column 1112a on the base 111 on the first elastic sheet 122, which is sleeved on the positioning column 1112a.

[0041] Please refer to Figure 1 , Figure 4 and Figure 9 , the shell 112 includes a top plate 1121 and a side plate 1122 extending from the periphery of the top plate 1121 towards the base 111. The top plate 1121 is provided with a first through hole 1121a coaxial with the third through hole 1111a. The bottom of the side plate 1122 is provided with a first notch 1122a corresponding to the position of the first protrusion 1111c. When the shell 112 is closed on the base 111, the side plate 1122 is placed on the support table 1111b, and the first protrusion 1111c is located in the first notch 1122a. The first protrusion 1111c and the first notch 1122a are arranged to increase the contact area between the base 111 and the shell 112, making the connection more secure. In this embodiment, the first notch 1122a is slightly larger than the first protrusion 1111c to facilitate glue fixing.

[0042] The lens assembly (not shown in the figure) is arranged through the first through hole 1121a and the second through hole 121. The gap between the lens assembly and the hole wall of the first through hole 1121a and the second through hole 121 constitutes a first gap, which communicates with the inner space 13. The first conductive part 211 and the second conductive part 212 are used to adsorb the fine particles reaching the inner space 13 through the first gap. The second gap is formed between the motor assembly 12 and the hole wall of the first through hole 1121a, and the second gap also communicates with the inner space 13. The first conductive part 211 and the second conductive part 212 are also used to adsorb the fine particles reaching the inner space 13 through the second gap. The fine particles include dust particles from the outside and carrier debris generated by the collision of the motor assembly and the lens assembly during movement.

[0043] The assembling mode of the dustproof motor of the embodiment is as follows: (1) assembling the conductive unit 21: the first conductive part 211 and the second conductive part 212 are welded together close to one end of the bottom wall 1111 by laser welding, then the first conductive part 211 and the second conductive part 212 are respectively bonded to the side wall 1112 of the base 111 towards the inner space 13 by pre-coating quick curing UV glue on the side of the first conductive part 211 and the second conductive part 212 close to the side wall 1112, and finally the first connecting part 2112 and the positive electrode pin 1113 and the second connecting part 2122 and the negative electrode pin 1114 are welded together by laser welding; (2) assembling the dust sticking unit 22: the conductive dust sticking glue is respectively coated on the side of the first conductive part 211 and the second conductive part 212 towards the inner space 13; (3) assembling the motor assembly 12: the positioning hole 1221 of the first elastic sheet 122 is aligned with the positioning column 1112a on the base 111, the first elastic sheet 122 is pressed to make the positioning column 1112a inserted into the positioning hole 1221, further reinforcing to prevent the first elastic sheet 122 from slipping off, and then the carrier 124, the coil 125, the magnet 126 and the second elastic sheet 123 are installed; (4) assembling the shell 112: the shell 112 is covered on the base 111 by the cooperation of the first protrusion 1111c and the first gap 1122a, and the shell 112 and the base 111 are bonded together by glue.

[0044] The working principle of the utility model is as follows: when the motor works, the positive electrode pin 1113 and the negative electrode pin 1114 are electrified, the first conductive part 211 and the second conductive part 212 conduct electricity to generate an electrostatic field, the first conductive part 211 carries positive charge, and the second conductive part 212 carries negative charge. According to Coulomb's law, the tiny particles with negative charge are adsorbed to the first conductive part 211, and the tiny particles with positive charge are adsorbed to the second conductive part 212. When the motor stops working, the positive electrode pin 1113 and the negative electrode pin 1114 are de-energized, the electrostatic field disappears, the adsorbed tiny particles lose the electric field force and may fall off under the influence of gravity, but at this time, the tiny particles are firmly adhered by the first dust sticking part 221 and the second dust sticking part 222, thereby preventing the tiny particles from falling onto the BG to cause the POG imaging problem.

[0045] The utility model integrates the electrostatic adsorption and dust sticking double dustproof mechanism, completely blocks the path of tiny particles migrating to the BG, eliminates the black spots, light spots and artifacts, ensures the imaging purity, solves the POG imaging problem and improves the optical performance; covers the key gap (first gap / second gap) in the motor, can not only capture the external dust invading through the gap between the lens assembly and the motor assembly in real time, but also can synchronously adsorb the carrier debris generated by the movement collision; the electrostatic adsorption mechanism is simple in structure and integrated in the inner space of the motor base, maximizes the space utilization, does not increase the additional volume and meets the compact design requirement of the mobile terminal.

[0046] The above embodiments only express the preferred embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A dust-proof motor comprising a motor body, characterized by: An electrostatic adsorption mechanism is arranged on the motor body and used for adsorbing fine particles in the motor body; the electrostatic adsorption mechanism comprises a conductive unit and a dust sticking unit covering the surface of the conductive unit.

2. The dust-proof motor according to claim 1, characterized by: The conductive unit comprises a first conductive part and a second conductive part, the first conductive part is connected to the positive pole of the power supply, and the second conductive part is connected to the negative pole of the power supply; the dust sticking unit comprises a first dust sticking part covering the surface of the first conductive part and a second dust sticking part covering the surface of the second conductive part.

3. The dust-proof motor according to claim 2, wherein: The first conductive part and the second conductive part can be made of steel, aluminum or copper materials with conductive properties. The first dust sticking part and the second dust sticking part can be configured as conductive dust sticking glue coated on the surface of the corresponding conductive part.

4. The dust-proof motor according to claim 2, wherein: The first conductive part is electrically connected to the positive pole of the power supply through a positive pole pin, and the second conductive part is electrically connected to the negative pole of the power supply through a negative pole pin.

5. The dust-proof motor according to claim 2, wherein: The motor body comprises a shell assembly and a motor assembly arranged in the shell assembly, and the electrostatic adsorption mechanism is arranged at the bottom of the shell assembly near the outer edge; There is an inner space between the motor assembly and the bottom of the shell assembly, the first conductive part and the second conductive part are arranged in the inner space, the first gap between the motor assembly and the lens assembly is in communication with the inner space, and the first conductive part and the second conductive part are used for adsorbing fine particles reaching the inner space through the first gap.

6. The dust-proof motor according to claim 5, wherein: There is a second gap between the motor assembly and the shell, the second gap is in communication with the inner space, and the first conductive part and the second conductive part are also used for adsorbing fine particles reaching the inner space through the second gap.

7. The dust-proof motor according to claim 5, wherein: The first dust sticking part is arranged on the side of the first conductive part facing the inner space, and the second dust sticking part is arranged on the side of the second conductive part facing the inner space.

8. The dust-proof motor according to claim 6, wherein: The shell assembly comprises a base and a shell covering the base, the base comprises a bottom wall and side walls erected at each edge position of the bottom wall, the side walls are connected end to end and surround the bottom wall and the bottom of the motor assembly to form the inner space; The first conductive part and the second conductive part are arranged on the side of two opposite side walls facing the inner space, respectively.

9. The dust-proof motor according to claim 8, wherein: The shell, the motor assembly and the base are coaxially provided with a first through hole, a second through hole and a third through hole penetrating along the optical axis direction, respectively, the lens assembly is arranged in the first through hole and the second through hole, and the gap between the lens assembly and the hole wall of the first through hole and the second through hole constitutes the first gap.

10. The dust-proof motor according to claim 9, wherein: The gap between the motor assembly and the hole wall of the first through hole constitutes the second gap.

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