Motor assembly and fixing structure, voice coil motor, photographic device, electronic product

Abstract

The present invention discloses a motor assembly fixing structure, a voice coil motor, a camera device, and an electronic product. The technical solution thereof is as follows: a motor assembly fixing structure, comprising a base, a carrier, an upper spring, a lower spring, a magnet, and a coil. The base is integrally formed with four positioning posts. The upper spring comprises two symmetrically arranged upper spring sections, each of which comprises an inner connecting section, an outer connecting section, and an upper cantilever. The outer connecting section and the upper cantilever are both arranged in two and correspond to the positioning posts. The positioning posts are integrally formed with a hot riveting post, and the outer connecting section is provided with a hot riveting hole corresponding to the hot riveting post. The four positioning posts are connected with a cover plate for covering the outer connecting section, and the cover plate and the positioning posts clamp and fix the outer connecting section. The present invention can effectively fix the upper spring by clamping and fixing the outer connecting section with the cover plate and the positioning posts, and eliminates the step of hot riveting the upper spring to the positioning post, thereby achieving precise positioning and improving product quality.

Description

Technical Field

[0001] The present invention relates to the field of photographic equipment, and particularly to a motor assembly and fixing structure, a voice coil motor, a photographic device, and an electronic product. Background Art

[0002] The existing voice coil motor structure generally includes a base 1, a carrier 2, a bracket, an upper spring 3, a lower spring 4, and a housing 36. A lens 7 is installed on the carrier 2, and the upper spring 3 is thermally riveted and fixed to the bracket. The lower spring 4 is fixed to the base 1. The existing bracket and the base 1 are separately provided or the bracket and the base 1 are integrally formed as a whole. The bracket is provided with a thermal riveting post 13, and the upper spring 3 is provided with a thermal riveting hole 14 sleeved on the thermal riveting post 13. When installing the upper spring 3 on the bracket, the thermal riveting post 13 passes through the thermal riveting hole 14, and then the thermal riveting post 13 is thermally riveted and deformed to achieve the effect of fixing the upper spring 3.

[0003] Due to the small size of the existing voice coil motor structure and the tight fit between multiple components, the thermal riveting space for the upper spring 3 is small, making it difficult to operate during the thermal riveting operation. And when thermally riveting and fixing the spring, the spring wrist (between the spring cantilever and the spring connection end) will rotate and deform relatively, which will affect the performance of the voice coil motor.

[0004] Therefore, it is necessary for us to improve such a structure to overcome the above defects. Summary of the Invention

[0005] The purpose of the present invention is to provide a motor assembly and fixing structure, a voice coil motor, a photographic device, and an electronic product. By clamping and fixing the outer connection part with a cover plate and a positioning post, the upper spring can be effectively fixed, and the step of thermally riveting and fixing the upper spring to the positioning post can be omitted, achieving precise positioning and improving product quality.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: A motor assembly and fixing structure includes a base, a carrier, an upper spring, a lower spring, a magnet, and a coil. The lower spring is arranged between the lower end face of the carrier and the base. Four positioning posts are integrally formed on the base and are evenly distributed. Four magnets are arranged at the corner positions of the base and are attached to the side walls of the positioning posts. The upper spring is arranged between the upper end face of the positioning post and the upper end face of the carrier. The upper spring includes two symmetrically arranged upper spring branches. Each upper spring branch includes an inner connection part connected to the carrier, an outer connection part connected to the positioning post, and an upper cantilever arranged between the inner connection part and the outer connection part. The outer connection part and the upper cantilever are both provided with two and correspond to the positioning posts. The positioning post is integrally formed with a thermal riveting post, and the outer connection part is provided with a thermal riveting hole corresponding to the thermal riveting post. Four positioning posts are connected with a cover plate for covering the outer connection part, and the cover plate and the positioning post clamp and fix the outer connection part.

[0007] A further setting of the present invention is that a convex portion abutting against the outer connection portion is integrally formed at the end of the cover plate facing the positioning post. A positioning groove corresponding to the hot riveting post is provided in the convex portion, and the lower end surface of the cover plate is attached to the upper end surface of the magnet.

[0008] A further setting of the present invention is that the outer connection portion is provided with a dispensing hole for facilitating dispensing and fixing with the positioning post. A power connection hole is provided in one outer connection portion of each upper spring branch. Two of the positioning posts are connected with power connection terminals. The power connection terminals protrude from the upper end surface of the positioning post and are inserted into the corresponding power connection holes. The ones not connected with power connection terminals are provided with dispensing grooves corresponding to the dispensing holes.

[0009] A further setting of the present invention is that a lens is integrally formed on the carrier.

[0010] A further setting of the present invention is that two wire winding grooves corresponding to the upper spring branches are provided on the upper end surface of the carrier. The two wire winding grooves are respectively for the end wire heads of the coil to pass through and be stuck in. The upper spring branch is integrally formed with a wire winding portion corresponding to the wire winding groove. A fixing groove for facilitating the end wire head of the coil to wind around is provided on the side wall of the wire winding portion. The opening direction of the fixing groove is parallel to the length direction of the wire winding groove, and the fixing groove is located in the direction of the carrier center of the wire winding portion.

[0011] A further setting of the present invention is that the lower spring includes a lower connection ring connected to the lower end surface of the carrier, four lower connection portions provided on the base, and four lower cantilevers respectively provided between the lower connection portions and the lower connection ring. The lower connection portions are located directly below the magnets. The lower connection portions are provided with fixing holes, and the base is integrally formed with fixing posts passing through the fixing holes and fixing the lower connection portions.

[0012] A further setting of the present invention is that four assembly grooves are provided on the lower end surface of the base, and the four assembly grooves respectively extend into the inner cavity of the positioning post.

[0013] A further setting of the present invention is that a voice coil motor has the above-mentioned motor assembly and fixing structure, and further includes a housing, and the cover plate abuts against the bottom surface of the housing.

[0014] A further setting of the present invention is that a photographic device has the above-mentioned motor assembly and fixing structure.

[0015] A further setting of the present invention is that an electronic product has the above-mentioned motor assembly and fixing structure.

[0016] In summary, the present invention has the following beneficial effects:

[0017] When assembling the upper spring, install and fix the inner connection part of the upper spring on the upper end face of the carrier, and install the outer connection part on the corresponding positioning post, so that the hot riveting post passes through the hot riveting hole to position the position of the outer connection part relative to the positioning post. Then cover the cover plate on the outer connection part to realize the clamping and fixing of the outer connection part between the cover plate and the end face of the positioning post, and effectively avoid the step of hot riveting the hot riveting post and the outer connection part, thus effectively avoiding the problem of difficult operation due to insufficient hot riveting space. At the same time, the problem of spring deformation during hot riveting can be avoided. Through the above method, accurate positioning, product quality and yield are improved.

[0018] The cover plate ensures abutting against the outer connection part through the convex part to prevent relative movement of the outer connection part. At the same time, the hot riveting post passes through the positioning groove to position the cover plate and avoid rotational movement adjacent to the cover plate.

[0019] When fixing the inner connection part to the carrier, pass the riveting post through the riveting hole and perform hot riveting fixation, and at the same time perform dotting glue fixation at the position of the glue application hole, so as to fix the inner connection part to the upper end face of the carrier.

[0020] When connecting the two ends of the coil to the corresponding inner upper spring parts respectively, first insert the end wire of the coil into the winding groove. At this time, the coil wire head faces the lens direction. Then, after the coil wire head is folded back, the wire head is reversely wound around the winding part, and the wire head is stuck in the fixing groove position, and the position of the coil wire head relative to the winding part is effectively positioned. Then, the position of the wire head and the winding part is fixed by electric welding, so as to realize the connection between the coil wire head and the winding part, and at the same time effectively determine the electric welding position of the wire head and the winding part. In addition, after the coil wire head is reversely wound around the winding part, reverse pulling can be performed to realize the tensioning of the coil, effectively avoiding the situation of coil relaxation and falling off, thereby further improving the product quality and yield.

[0021] By abutting the bottom surface of the housing against the cover plate, it can be ensured that the cover plate and the positioning post clamp the outer connection part, and effectively limit the relative movement of the cover plate and the outer connection part. Description of the Drawings

[0022] Figure 1 is a schematic structural view of Embodiment 1 with the cover plate removed;

[0023] Figure 2 is a cross-sectional view of Embodiment 1;

[0024] Figure 3 is a schematic structural view of the upper spring and the carrier in Embodiment 1;

[0025] Figure 4 is a schematic structural view of the cover plate;

[0026] Figure 5 is a schematic structural view of the upper spring;

[0027] Figure 6It is a schematic structural diagram of the lower spring;

[0028] Figure 7 It is a schematic structural diagram of the base;

[0029] Figure 8 It is an exploded schematic diagram of Embodiment 2.

[0030] The corresponding component names represented by the numbers in the figure: 1. Base; 2. Carrier; 3. Upper spring; 3-1. Upper spring branch; 4. Lower spring; 5. Magnet; 6. Coil; 7. Lens; 8. Positioning post; 9. Assembly groove; 10. Inner connection part; 11. Outer connection part; 12. Upper cantilever; 13. Thermo-riveting post; 14. Thermo-riveting hole; 15. Cover plate; 16. Glue dispensing hole; 17. Protrusion; 18. Positioning groove; 19. Power connection hole; 20. Power connection terminal; 21. Glue dispensing groove; 22. Riveting hole; 23. Upper glue hole; 24. Installation part; 25. Riveting post; 26. Wire winding groove; 27. Wire winding part; 28. Fixed groove; 29. Limit protrusion; 30. Accommodation groove; 31. Lower connection ring; 32. Lower connection part; 33. Lower cantilever; 34. Fixed hole; 35. Fixed post; 36. Outer shell. Detailed implementation manners

[0031] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0032] Embodiment 1: As Figures 1 to 7 shown, a motor assembly and fixing structure proposed by the present invention includes a base 1, a carrier 2, an upper spring 3, a lower spring 4, a magnet 5, and a coil 6. In this embodiment, the carrier 2 is integrally formed with a lens 7, and the lens 7 is integrally formed with the carrier 2 to reduce the number of components. The lower spring 4 is installed between the lower end surface of the carrier 2 and the base 1. The base 1 is integrally formed with four evenly distributed positioning posts 8. The magnet 5 is provided in four and is located at the corner positions of the base 1 and fits against the side walls of the positioning posts 8. And the upper spring 3 is arranged between the upper end surface of the positioning post 8 and the upper end surface of the carrier 2. In addition, four assembly grooves 9 are opened on the lower end surface of the base 1, and the four assembly grooves 9 respectively extend into the inner cavities of the positioning posts 8. The base 1 can be conveniently positioned and fixed through the assembly grooves 9, which is convenient for subsequent assembly and processing.

[0033] The upper spring 3 includes two symmetrically arranged upper spring branches 3-1, and the two upper spring branches 3-1 are arranged at intervals. Each upper spring branch 3-1 includes an inner connection part 10 installed on the carrier 2, an outer connection part 11 installed on the positioning post 8, and an upper cantilever 12 connected between the inner connection part 10 and the outer connection part. Among them, both the outer connection part 11 and the upper cantilever 12 are provided in two and correspond to the positioning post 8. The positioning post 8 is integrally formed with a hot riveting post 13, the hot riveting post 13 is arranged vertically, the outer connection part 11 is provided with a hot riveting hole 14 corresponding to the hot riveting post 13, and four positioning posts 8 are connected with a cover plate 15 for covering the four outer connection parts 11, and the cover plate 15 and the positioning post 8 clamp and fix the outer connection part 11.

[0034] When assembling the upper spring 3, install and fix the inner connection part 10 of the upper spring 3 on the upper end surface of the carrier 2, and install the outer connection part 11 on the corresponding positioning post 8, so that the hot riveting post 13 passes through the hot riveting hole 14 to position the position of the outer connection part 11 relative to the positioning post 8. Then cover the cover plate 15 on the outer connection part 11 to realize the clamping and fixing of the outer connection part 11 between the cover plate 15 and the end surface of the positioning post 8, and the step of hot riveting the hot riveting post 13 and the outer connection part 11 can be effectively avoided, thereby effectively avoiding the problem of difficult operation due to insufficient hot riveting space. At the same time, the problem of spring deformation during hot riveting can be avoided. Through the above method, accurate positioning, improved product quality and yield can be achieved.

[0035] In this embodiment, the end of the cover plate 15 facing the positioning post 8 is integrally formed with a convex part 17 abutting against the outer connection part 11. The convex part 17 is provided with a positioning groove 18 corresponding to the hot riveting post 13, and the lower end surface of the cover plate 15 fits against the upper end surface of the magnet 5. That is, the cover plate 15 ensures abutting against the outer connection part 11 through the convex part 17 to avoid relative movement of the outer connection part 11. At the same time, by passing the hot riveting post 13 through the positioning groove 18, the function of positioning the cover plate 15 is achieved, and the adjacent rotational movement of the cover plate 15 is avoided.

[0036] The outer connection part 11 is provided with a dispensing hole 16 for facilitating dispensing and fixing with the positioning post 8. One outer connection part 11 of each upper spring branch 3-1 is provided with a power connection hole 19. Among them, two positioning posts 8 are connected with power connection terminals 20, and the two power connection terminals 20 are respectively connected to the two upper spring branches 3-1. The power connection terminals 20 protrude from the upper end surface of the positioning post 8 and pass through the corresponding power connection holes 19. The positioning posts 8 not connected with the power connection terminals 20 are provided with dispensing grooves 21 corresponding to the dispensing holes 16. Through the dispensing holes 16 and the dispensing grooves 21, the position of the outer connection part 11 can be further fixed, and the fixing strength of the outer connection part 11 is also improved through the connection of the power connection holes 19 and the power connection terminals 20.

[0037] To fix the inner connection part 10, an installation part 24 is integrally formed between the inner connection part 10 and the upper cantilever 12. The installation part 24 is provided with a riveting hole 22 and an upper glue hole 23, and the carrier 2 is integrally formed with a riveting post 25 for the riveting post 25 to be sleeved. When fixing the inner connection part 10 to the carrier 2, the riveting post 25 is passed through the riveting hole 22 and thermally riveted and fixed, and at the same time, glue is applied and fixed at the position of the upper glue hole 23, so as to fix the inner connection part 10 to the upper end face of the carrier 2.

[0038] To facilitate the connection between the end wire heads of the coil 6 and the upper spring branch 3-1, two wire winding grooves 26 corresponding to the two inner connection parts 10 are provided on the upper end face of the carrier 2, and the two ends of the coil 6 are respectively passed through the two wire winding grooves 26; each inner connection part 10 is integrally formed with a wire winding part 27, the wire winding part 27 is located directly above the wire winding groove 26, the wire winding part 27 is located at the end position of the inner connection part 10, and the wire winding parts 27 of the two inner connection parts 10 are arranged oppositely. And a fixing groove 28 around which the wire head of the coil 6 is wound is provided on the side wall of the wire winding part 27, the fixing groove 28 is arranged in a U shape, the opening of the fixing groove 28 is parallel to the length direction of the wire winding groove 26, and the fixing groove 28 is located in the direction of the carrier 2 center of the wire winding part 27. When connecting the two ends of the coil 6 to the corresponding inner upper spring branch 3-1 respectively, the end wire heads of the coil 6 are first clamped into the wire winding groove 26, at this time the wire heads of the coil 6 face the lens 7 direction, then after the wire heads of the coil 6 are turned back, the wire heads are reversely wound around the wire winding part 27, and the wire heads are clamped into the position of the fixing groove 28, and the position of the wire heads of the coil 6 relative to the wire winding part 27 is effectively positioned, and then the wire heads and the position of the wire winding part 27 are welded and fixed, so as to realize the connection between the wire heads of the coil 6 and the wire winding part 27, and at the same time effectively determine the welding position of the wire heads and the wire winding part 27; in addition, after the wire heads of the coil 6 are reversely wound around the wire winding part 27, reverse wire pulling can be carried out to realize the tensioning effect on the coil 6, effectively avoiding the situation of the coil 6 loosening and falling off, thereby further improving the product quality and the yield rate.

[0039] A limiting protrusion 29 for limiting the position of the inner connection part 10 is integrally formed on the upper end face of the carrier 2. A chamber for the inner connection part 10 to be clamped is formed between the limiting protrusion 29 and the side wall of the lens 7, and the inner connection part 10 is clamped, effectively limiting and positioning the position of the inner connection part 10. The carrier 2 is also provided with a receiving groove 30 for the upper cantilever 12 to move up and down.

[0040] The lower spring 4 includes a lower connection ring 31 connected to the lower end face of the carrier 2, four lower connection parts 32 arranged on the base 1, and four lower cantilevers 33 respectively arranged between the lower connection parts 32 and the lower connection ring 31. The lower connection parts 32 are located directly below the magnet 5, the lower connection parts 32 are provided with fixing holes 34, and the base 1 is integrally formed with fixing posts 35 passing through the fixing holes 34 and fixing the lower connection parts 32.

[0041] Embodiment 2: A voice coil motor, as Figure 8As shown, it has the motor assembly and fixing structure of Embodiment 1, and further includes a housing 36. The end of the housing 36 abuts against the base 1, and the cover plate 15 abuts against the bottom surface of the housing 36. The side wall of the cover plate 15 fits against the inner side wall of the housing 36. By the bottom surface of the housing 36 abutting against the cover plate 15, it can ensure that the cover plate 15 and the positioning post 8 clamp the outer connection part 11, and effectively limit the relative movement of the cover plate 15 and the outer connection part 11.

[0042] Embodiment 3: A photographic device having the motor assembly and fixing structure of Embodiment 1.

[0043] Embodiment 4: An electronic product having the motor assembly and fixing structure of Embodiment 1.

[0044] In this article, the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the sake of clear expression of the technical solution and convenient description. Therefore, it cannot be understood as a limitation to the present invention.

[0045] In this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the listed elements, it may also include other elements not expressly listed.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor assembly and fixing structure, comprising a base (1), a carrier (2), an upper spring (3), a lower spring (4), a magnet (5), and a coil (6), characterized in that: The lower spring (4) is arranged between the lower end face of the carrier (2) and the base (1). Four uniformly distributed positioning columns (8) are integrally formed on the base (1). Four magnets (5) are arranged at the corner positions of the base (1) and are attached to the side walls of the positioning columns (8). The upper spring (3) is arranged between the upper end face of the positioning column (8) and the upper end face of the carrier (2). The upper spring (3) includes two symmetrically arranged upper spring branches (3-1). Each upper spring branch (3-1) includes an inner connecting portion (10) connected to the carrier (2), an outer connecting portion (11) connected to the positioning column (8), and an upper cantilever (12) arranged between the inner connecting portion (10) and the outer connecting portion (11). The outer connecting portion (11) and the upper cantilever (12) are both arranged in two and correspond to the positioning column (8). A hot riveting column (13) is integrally formed on the positioning column (8). A hot riveting hole (14) corresponding to the hot riveting column (13) is formed in the outer connecting portion (11). Four positioning columns (8) are connected with a cover plate (15) for covering the outer connecting portion (11), and the cover plate (15) and the positioning column (8) clamp and fix the outer connecting portion (11).

2. The motor assembly and fixing structure according to claim 1, characterized in that: A convex portion (17) abutting against the outer connecting portion (11) is integrally formed at the end of the cover plate (15) facing the positioning column (8). A positioning groove (18) corresponding to the hot riveting column (13) is formed in the convex portion (17). The lower end face of the cover plate (15) is attached to the upper end face of the magnet (5).

3. The motor assembly and fixing structure according to claim 1, characterized in that: A glue dispensing hole (16) convenient for glue dispensing and fixing with the positioning column (8) is formed in the outer connecting portion (11). A power connection hole (19) is formed in one of the outer connecting portions (11) of each upper spring branch (3-1). Two of the positioning columns (8) are connected with power connection terminals (20). The power connection terminals (20) protrude from the upper end face of the positioning column (8) and are inserted into the corresponding power connection holes (19). A glue dispensing groove (21) corresponding to the glue dispensing hole (16) is formed in the positioning column (8) not connected with the power connection terminal (20).

4. A motor assembly and fixing structure according to claim 1, characterized in that: A lens (7) is integrally formed on the carrier (2).

5. A motor assembly and fixing structure according to claim 1, characterized in that: Two wire winding grooves (26) corresponding to the upper spring branches (3-1) are formed on the upper end face of the carrier (2). The end wire heads of the coil (6) are respectively inserted and clamped into the two wire winding grooves (26). A wire winding portion (27) corresponding to the wire winding groove (26) is integrally formed on the upper spring branch (3-1). A fixing groove (28) convenient for winding the end wire head of the coil (6) is formed on the side wall of the wire winding portion (27). The opening direction of the fixing groove (28) is parallel to the length direction of the wire winding groove (26), and the fixing groove (28) is located in the direction of the wire winding portion (27) towards the center of the carrier (2).

6. The motor assembly and fixing structure according to claim 1, characterized in that: The lower spring (4) includes a lower connecting ring (31) connected to the lower end face of the carrier (2), four lower connecting parts (32) provided on the base (1), and four lower cantilevers (33) respectively provided between the lower connecting parts (32) and the lower connecting ring (31). The lower connecting parts (32) are located directly below the magnet (5). The lower connecting parts (32) are provided with fixing holes (34), and the base (1) is integrally formed with fixing columns (35) that pass through the fixing holes (34) and fix the lower connecting parts (32).

7. A motor assembly and fixing structure according to claim 1, characterized in that: Four assembly grooves (9) are provided on the lower end face of the base (1), and the four assembly grooves (9) respectively extend into the inner cavity of the positioning column (8).

8. A voice coil motor, characterized in that: The motor assembly and fixing structure according to any one of claims 1 to 6 further includes a housing (36), and the cover plate (15) abuts against the bottom surface of the housing (36).

9. A photographic device, characterized in that: The motor assembly and fixing structure according to any one of claims 1 to 6.

10. An electronic product, characterized in that: The motor assembly and fixing structure according to any one of claims 1 to 6.

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