Welding structure of voice coil motor lens carrier and elastic sheet

Abstract

The utility model relates to a welding structure of a voice coil motor lens carrier and an elastic sheet. The welding structure comprises a carrier, a coil wound on the carrier and the elastic sheet arranged on the carrier. The carrier is provided with two winding posts for winding wire ends at two ends of the coil respectively; the middle part of the coil is wound on the carrier; two ends of the coil are respectively wound on the winding post to form coil end winding parts; the elastic sheet is provided with a welding opening corresponding to the winding part of the coil end; the first side face, opposite to the welding opening, of the wrapping post is provided with a protruding part. The protruding part is located on the inner side of the coil end winding part. According to the utility model, the protruding part is arranged, so that the inclined part can be formed on one side or two sides of the protruding part after the winding part at the end of the coil is wound, a gap is formed between the inclined part and the elastic sheet, and the gap forms a visible observation area, so that the welding quality can be directly observed after the welding is completed, and the poor welding is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging, and in particular to a welding structure of a voice coil motor lens carrier and a spring. Background Technology

[0002] Commonly known voice coil motor devices used in the autofocus mechanisms of digital cameras and mobile phones move a lens holder along the optical axis via a moving mechanism consisting of a magnet, a coil, and a yoke. In this voice coil motor device, a coil pre-bundled into a ring is bonded to the outer circumference of the lens holder. The magnetic field of a magnet fixed to the inner wall of the yoke then moves the lens holder along the optical axis. In these voice coil motor devices, to achieve electrical conductivity between the coil and the spring, a common method is to use solder for the connection. In existing structures, a solder joint needs to be pre-drilled on the spring to connect to the start / end of the coil. Solder is applied before the connection is made. This soldering method is not only difficult to control and inconsistent, but also carries the risk of loose connections or breakage. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this utility model provides a welding structure for a voice coil motor lens carrier and a spring sheet.

[0004] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0005] A welding structure for a voice coil motor lens carrier and a spring sheet includes a carrier, a coil wound around the carrier, and a spring sheet disposed on the carrier; the carrier is provided with two winding posts for winding the ends of the coil at both ends; the middle part of the coil is wound on the carrier; the two ends of the coil are respectively wound on the winding posts to form coil end winding portions; the spring sheet has a welding port corresponding to the coil end winding portions; the first side of the winding post opposite the welding port has a protrusion; the protrusion is located inside the coil end winding portions.

[0006] Furthermore, the spring includes two independent springs, each connected to a winding post.

[0007] Furthermore, the winding post includes an extension post connected to the outer circumferential surface of the carrier and a limiting block located at the end of the extension post; the winding portion of the coil end is wound around the extension post and limited by the limiting block.

[0008] Furthermore, there are gaps between the windings at the coil end.

[0009] Furthermore, the protrusion is located in the middle of the first side surface.

[0010] Furthermore, a hollow area is formed between the two sides of the protrusion and the winding part at the end of the coil.

[0011] Furthermore, at least one end of the first side surface is provided with a slope.

[0012] Furthermore, solder is provided between the welding joint and the winding portion at the end of the coil.

[0013] The beneficial effects of this utility model are as follows: By setting the protrusion, the coil end winding part can form an inclined part on one or both sides of the protrusion after winding. There will be a gap between the inclined part and the spring piece. This gap constitutes a visual observation area, which allows direct observation of the welding quality after welding, thereby effectively avoiding the occurrence of welding defects. By setting the limiting block, the coil end winding part can be effectively prevented from detaching from the winding post before welding, improving the stability of the pre-connection. By setting the gap, the solder can flow into the inner side of the coil end winding part after welding melts through the gap, further improving the welding stability. The formation of the hollow area allows the solder to flow into the hollow area through the gap after welding melts. After the solder solidifies, the solder passes through the gap from the hollow area and connects with the welding joint. The solidified solder in the hollow area forms an anchor-like structure, which effectively enhances the welding stability with the coil end winding part and avoids the occurrence of cold solder joints. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural view of the present invention;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This is an enlarged view of part A of this utility model;

[0018] Figure 4 This is a cross-sectional view of the BB section of this utility model;

[0019] Figure 5 This is an enlarged view of part C of this utility model;

[0020] Explanation of reference numerals in the attached figures:

[0021] 100, Carrier; 110, Winding post; 111, Extension post; 1111, First side surface; 1112, Protrusion; 1113, Hollowed-out area; 1114, Inclined surface; 112, Limiting block; 200, Coil; 210, Coil end winding part; 211, Gap; 212, Inclined part; 300, Spring piece; 310, Welding joint; 400, Solder. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example:

[0026] like Figure 1-5As shown, a welding structure for a voice coil motor lens carrier and a spring sheet includes a carrier 100, a coil 200, and a spring sheet 300. The carrier 100 is a lens carrier used to mount the lens and can drive the lens to move along the optical axis under the action of a drive mechanism. The carrier 100 is provided with two winding posts 110 for winding the ends of the coil 200. In one embodiment, the winding posts 110 are disposed on the outer peripheral surface of the carrier 100. The middle part of the coil 200 is wound on the carrier 100, that is, wound on the outer peripheral surface of the carrier 100, such as... Figure 1 As shown in the figure; the two ends of the coil 200 are respectively wound around the winding post 110 to form the coil end winding portion 210; the spring piece 300 has a welding port 310 corresponding to the coil end winding portion 210; in one embodiment, the spring piece 300 includes two independent spring pieces, each connected to a winding post 110; the first side 1111 of the winding post 110 opposite to the welding port 310 has a protrusion 1112; the protrusion 1112 is located inside the coil end winding portion 210; by setting the protrusion 1112, the coil end winding portion 210 can form an inclined portion 212 on one or both sides of the protrusion 1112 after winding, and there will be a gap between the inclined portion 212 and the spring piece 300. This gap constitutes a visual observation area, which allows the welding quality to be directly observed after welding, thereby effectively avoiding the occurrence of welding defects;

[0027] In one embodiment, the winding post 110 includes an extension post 111 connected to the outer peripheral surface of the carrier 100 and a limiting block 112 disposed at the end of the extension post 111; the coil end winding portion 210 is wound around the extension post 111 and limited by the limiting block 112; by setting the limiting block 112, the coil end winding portion 210 can be effectively prevented from detaching from the winding post 110 before welding, thereby improving the stability of the pre-connection;

[0028] In one embodiment, there is a gap 211 between each winding of the coil end winding portion 210; by setting the gap 211, the solder 400 can flow into the inside of the coil end winding portion 210 through the gap 211 after the solder melts, which further improves the stability of the soldering.

[0029] In one embodiment, the protrusion 1112 is located in the middle of the first side surface 1111. By setting the protrusion 1112 in the middle of the first side surface 1111, the coil end winding portion 210 can form inclined portions 212 on both sides of the protrusion 1112 after winding. There will be a gap between the inclined portions 212 and the spring piece 300. This gap constitutes a visual observation area. The inclined portions 212 on both sides expand the range of the visual observation area, making it easier to observe the welding quality during welding, thereby effectively avoiding the occurrence of welding defects.

[0030] In one embodiment, a hollow area 1113 is formed between the two sides of the protrusion 1112 and the coil end winding portion 210. The hollow area 1113 is usually formed naturally when the ends of the coil 200 are wound around the winding post 110. That is, after the protrusion 1112 is set, when the coil is wound in a normal winding manner, the hollow area 1113 will be formed on both sides of the protrusion 1112. Solder 400 is provided between the welding port 310 and the coil end winding portion 210. The formation of the hollow area 1113 allows the solder 400 to flow into the hollow area 1113 through the gap 211 after the solder melts. After the solder 400 solidifies, it passes through the gap 211 from the hollow area 1113 and connects with the welding port 310. The solidified solder 400 in the hollow area 1113 forms an anchor-like structure, which effectively enhances the welding stability with the coil end winding portion 210 and avoids the occurrence of poor soldering.

[0031] In one embodiment, at least one end of the first side surface 1111 is provided with a bevel 1114; by providing the bevel 1114, the space of the cutout area 1113 can be reduced, the accommodating space of the cutout area 1113 can be reduced, and the amount of solder 400 used can be saved; on the other hand, after providing the bevel 1114, the range of the visible observation area can be increased, making it convenient to observe the welding quality.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A welding structure for a voice coil motor lens carrier and a spring, characterized in that: The device includes a carrier (100), a coil (200) wound around the carrier (100), and a spring piece (300) disposed on the carrier (100). The carrier (100) is provided with two winding posts (110) for winding the ends of the coil (200) to be wound. The middle part of the coil (200) is wound on the carrier (100). The two ends of the coil (200) are respectively wound on the winding posts (110) to form coil end winding portions (210). The spring piece (300) has a welding port (310) corresponding to the coil end winding portion (210). The first side (1111) of the winding post (110) opposite to the welding port (310) has a protrusion (1112). The protrusion (1112) is located inside the coil end winding portion (210).

2. The welding structure of a voice coil motor lens carrier and a spring sheet according to claim 1, characterized in that: The spring (300) includes two independent springs, each connected to a winding post (110).

3. The welding structure of the voice coil motor lens carrier and the spring sheet according to claim 1, characterized in that: The winding post (110) includes an extension post (111) connected to the outer peripheral surface of the carrier (100) and a limiting block (112) located at the end of the extension post (111); the coil end winding portion (210) is wound around the extension post (111) and limited by the limiting block (112).

4. The welding structure of a voice coil motor lens carrier and a spring sheet according to claim 1, characterized in that: The coil end winding portion (210) has gaps (211) between each winding wire.

5. The welding structure of a voice coil motor lens carrier and a spring sheet according to claim 1, characterized in that: The protrusion (1112) is located in the middle of the first side surface (1111).

6. The welding structure of a voice coil motor lens carrier and a spring sheet according to claim 5, characterized in that: A hollow area (1113) is formed between the two sides of the protrusion (1112) and the winding part (210) at the end of the coil.

7. The welding structure of a voice coil motor lens carrier and a spring sheet according to claim 1 or 5, characterized in that: At least one end of the first side surface (1111) is provided with a slope (1114).

8. The welding structure of a voice coil motor lens carrier and a spring sheet according to claim 1, characterized in that: Solder (400) is provided between the welding joint (310) and the winding portion (210) at the end of the coil.

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