A wireless charging coil for electronic watches

Abstract

This utility model relates to a wireless charging coil, specifically a wireless charging coil for electronic watches. The wireless charging coil includes a substrate, a coil body disposed on the substrate, and a limiting structure. The coil body is fixed to the limiting structure and includes a single coil wound multiple times on the substrate. The limiting structure includes multiple ring-shaped recessed arc plates. The multiple coil turns are respectively fixed within the multiple recessed arc plates. Multiple inner posts are fixed to the end of each recessed arc plate away from the single coil, and the inner posts are distributed along the circumference of the recessed arc plate. This wireless charging coil for electronic watches not only meets the charging efficiency requirements of electronic watches but also allows for a thinner, more aesthetically pleasing design. It significantly reduces resistance, improves induction capability, reduces energy loss, and increases conversion efficiency, maintaining a relatively fast charging speed even after long-term use.

Description

Technical Field

[0001] This utility model relates to a wireless charging coil, specifically a wireless charging coil for electronic watches. Background Technology

[0002] The wireless charging coil is the core component of the wireless charging system of an electronic watch. It realizes the wireless transmission of electrical energy through the principle of electromagnetic induction. Its function is to convert magnetic field energy into electrical energy to charge the battery of the electronic watch.

[0003] Existing wireless charging coils for electronic watches have complex and poorly designed structures. They are typically mounted on the upper surface of a substrate, with insufficient tightness and no locking mechanisms. Therefore, over time, the coil is prone to loosening or deformation, leading to decreased charging efficiency. Furthermore, both the substrate and the coil have a certain thickness, increasing the overall thickness of the watch and compromising its aesthetics. The cross-sectional diameter of existing wireless charging coils is typically around 20mm, and the spacing between adjacent coil turns is relatively large, limiting the coil's inductive capabilities and exacerbating energy loss, resulting in slower charging speeds over time. To address these issues, the inventors have improved the structure of the wireless charging coil. Utility Model Content

[0004] The purpose of this invention is to provide a wireless charging coil for electronic watches. This wireless charging coil has a simple structure and reasonable design. By fixing the coil body to a limiting structure, the multi-turn individual coil maintains structural stability, which is beneficial for reducing the diameter of the individual coil. Precision winding is used to maximize the number of turns in the individual coil. The flat design of the individual coil makes it suitable for electronic watches with very limited space. This satisfies the charging efficiency requirements of electronic watches while allowing for a thinner and more aesthetically pleasing watch. By limiting the cross-sectional diameter of the individual coil to within 12mm, the resistance is greatly reduced, the induction capability is improved, and the magnetic field energy is received more efficiently, reducing energy loss and improving conversion efficiency. It also maintains a relatively fast charging speed even after long-term use, thus solving the problems mentioned in the above-mentioned technical background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wireless charging coil for an electronic watch, comprising a substrate, a coil body disposed on the substrate, and a limiting structure, wherein the coil body is fixed to the limiting structure, and the coil body includes a single coil wound multiple turns above the substrate, the inner diameter of the multiple turns of the single coil gradually increasing from the inside to the outside; the limiting structure includes multiple ring-shaped sunken arc plates, the multiple turns of the single coil being fixed within the multiple sunken arc plates respectively, and each sunken arc plate having multiple inner edge posts fixed at the end away from the single coil, the multiple inner edge posts being distributed along the circumference of the sunken arc plate. The upper part of the inner edge post extends towards the interior of the substrate and is fixed inside the substrate. The lower arc plate can be used to position the individual coil, so that the bottom of the individual coil is embedded inside the substrate. At the same time, the lower arc plate plays a certain role in fixing the individual coil. In addition, the extension of the inner edge post towards the interior of the substrate further enhances the structural stability of the individual coil, so that the individual coil will not deform after long-term use, ensuring its induction capacity after long-term use. This allows the individual coil to receive magnetic field energy more efficiently, reduce energy loss, improve conversion efficiency, and thus maintain a faster charging speed.

[0006] Preferably, a plurality of annular mounting grooves are provided on the upper end surface of the substrate, and the plurality of mounting grooves are coaxially arranged.

[0007] Preferably, the multi-turn individual coils are embedded in the interior of multiple mounting slots, and the cross-sectional diameter of the individual coils is between 10mm and 12mm.

[0008] Preferably, the cross-section of the sunken arc plate is C-shaped, and multiple sunken arc plates are fixed in multiple mounting grooves respectively, and each fits into the inner wall of the multiple mounting grooves.

[0009] Preferably, the multi-turn individual coils are all made of silver alloy, and the spacing between two adjacent individual coils is between 0.4mm and 0.6mm, so as to minimize the spacing between two adjacent individual coils, thereby reducing space occupation and making it easier to set more individual coils, so as to make the overall induction capability of the multi-turn individual coils stronger.

[0010] Preferably, each end of a single coil has a wire end, and both wire ends extend to the outside of the substrate.

[0011] Preferably, a positioning head is fixed at the end of each inner edge post away from the recessed arc plate. The width of the positioning head is greater than the width of the inner edge post. The positioning head can keep the inner edge post inside the substrate, ensuring that the inner edge post will not fall off, thereby ensuring the structural stability of the single coil.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a wireless charging coil for electronic watches. The wireless charging coil for electronic watches includes a substrate, a coil body disposed on the substrate, and a limiting structure. The overall structure is simple and reasonably designed. The coil body is fixed on the limiting structure. The coil body includes a single coil wound multiple times on the substrate. The limiting structure includes multiple ring-shaped sunken arc plates. The multiple single coils are fixed in the multiple sunken arc plates. Each sunken arc plate has multiple inner edge pillars fixed at the end away from the single coil. The multiple inner edge pillars are distributed in the circumferential direction of the sunken arc plate, and the ends of the multiple inner edge pillars away from the single coil all extend towards the interior of the substrate. The limiting structure firmly fixes the single coil to the substrate, making the multi-turn single coil structurally stable. This is beneficial for reducing the diameter of the single coil. Precision winding is used to maximize the number of turns of the single coil. The flat design of the single coil makes it suitable for electronic watches with very limited space. It not only meets the charging efficiency requirements of electronic watches, but also makes the thickness of electronic watches thinner, making electronic watches more beautiful and more practical.

[0013] 2. The single coil in this utility model is made of silver alloy material. By limiting the cross-sectional diameter of the single coil to within 12mm, the resistance is greatly reduced, the induction capability is improved, and it can receive magnetic field energy more efficiently, reduce energy loss, and improve conversion efficiency, so that it can still maintain a fast charging speed after long-term use. Attached Figure Description

[0014] Figure 1 This is the front view of the present utility model; Figure 2 This is a structural diagram of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This utility model Figure 3 A magnified view of A in the middle.

[0015] The reference numerals and names in the figure are as follows: 1. Base plate; 2. Coil body; 21. Single coil; 22. Wire end; 3. Limiting structure; 31. Recessed arc plate; 32. Inner edge post; 33. Positioning head. Detailed Implementation The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of the embodiments of this utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0017] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0018] Please see Figure 1 One embodiment of this utility model is a wireless charging coil for an electronic watch, which includes a substrate 1 and a coil body 2 disposed on the substrate 1.

[0019] Please see Figure 2 The coil body 2 includes a single coil 21 wound on the substrate 1 with multiple turns. The single coil 21 is precision wound and the inner diameter of the single coil 21 gradually increases from the inside to the outside. Both ends of the single coil 21 are provided with wire ends 22, and both wire ends 22 extend to the outside of the substrate 1.

[0020] Please see Figures 3 to 4The substrate 1 is also provided with a limiting structure 3, in which the coil body 2 is fixed to the limiting structure 3. The limiting structure 3 includes multiple ring-shaped sunken arc plates 31. The multi-turn single coil 21 is fixed in the multiple sunken arc plates 31. Each sunken arc plate 31 has multiple inner edge posts 32 fixed at the end away from the single coil 21. The multiple inner edge posts 32 are distributed in the circumferential direction of the sunken arc plate 31, and the ends of the multiple inner edge posts 32 away from the single coil 21 extend towards the interior of the substrate 1 and are fixed inside the substrate 1. The sunken arc plates 31 can position the single coil 21 so that the bottom of the single coil 21 is embedded in the interior of the substrate 1. At the same time, the sunken arc plates 31 play a certain role in fixing the single coil 21. In addition, the extension of the inner edge posts 32 towards the interior of the substrate 1 further enhances the structural stability of the single coil 21, so that the single coil 21 will not deform after long-term use, thus ensuring its induction capability after long-term use. This design allows the individual coil 21 to receive magnetic field energy more efficiently, reducing energy loss and improving conversion efficiency, thereby maintaining a faster charging speed. A positioning head 33 is fixed at the end of each inner edge post 32 away from the recessed arc plate 31. The width of the positioning head 33 is greater than the width of the inner edge post 32. The positioning head 33 ensures that the inner edge post 32 remains inside the substrate 1, preventing it from falling off and thus ensuring the structural stability of the individual coil 21. The limiting structure 3 firmly fixes the individual coil 21 to the substrate 1, maintaining the structural stability of the multi-turn individual coil 21. This helps to reduce the diameter of the individual coil 21 and allows for precision winding, maximizing the number of turns. The flattened design of the individual coil 21 adapts to the limited space of electronic watches, satisfying the charging efficiency requirements of electronic watches while also making the watches thinner and more aesthetically pleasing.

[0021] Please refer to it again. Figures 3 to 4 The upper surface of the substrate 1 is provided with multiple annular mounting slots, all of which are coaxially arranged. Multi-turn individual coils 21 are embedded in the interior of the multiple mounting slots, and the cross-sectional diameter of the individual coils 21 is between 10mm and 12mm. The cross-section of the recessed arc plate 31 is C-shaped, and the multiple recessed arc plates 31 are fixed in the multiple mounting slots and fit with the inner wall of the multiple mounting slots. In addition, the material of the multi-turn individual coils 21 is silver alloy, and the spacing between two adjacent individual coils 21 is between 0.4mm and 0.6mm. The spacing between two adjacent individual coils 21 is minimized as much as possible to reduce space occupation, so as to set more individual coils 21, which greatly reduces resistance and makes the overall induction capability of the multi-turn individual coils 21 stronger, enabling it to receive magnetic field energy more efficiently, reduce energy loss, improve conversion efficiency, and thus maintain a fast charging speed even after long-term use.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A wireless charging coil for an electronic watch, characterized by: The system includes a substrate (1), a coil body (2) disposed on the substrate (1), and a limiting structure (3). The coil body (2) is fixed on the limiting structure (3), and the coil body (2) includes a single coil (21) wound multiple turns above the substrate (1). The inner diameter of the single coil (21) gradually increases from the inside to the outside. The limiting structure (3) includes multiple ring-shaped sunken arc plates (31). The single coil (21) is fixed in the multiple sunken arc plates (31). Each sunken arc plate (31) has multiple inner edge pillars (32) fixed at one end away from the single coil (21). The multiple inner edge pillars (32) are distributed in the circumferential direction of the sunken arc plate (31), and the ends of the multiple inner edge pillars (32) away from the single coil (21) extend toward the inside of the substrate (1) and are fixed inside the substrate (1).

2. The wireless charging coil for an electronic watch according to claim 1, wherein: The upper surface of the substrate (1) is provided with a plurality of annular mounting grooves, all of which are coaxially arranged.

3. The wireless charging coil for an electronic watch according to claim 2, wherein: The multi-turn single coil (21) is embedded in the interior of multiple mounting slots, and the cross-sectional diameter of the single coil (21) is between 10mm and 12mm.

4. The wireless charging coil for an electronic watch of claim 2, wherein: The cross-section of the sunken arc plate (31) is C-shaped, and multiple sunken arc plates (31) are fixed in multiple mounting slots and respectively match the inner wall of the multiple mounting slots.

5. The wireless charging coil for an electronic watch of claim 1, wherein: The material of the multi-turn single coil (21) is silver alloy, and the spacing between two adjacent single coils (21) is between 0.4mm and 0.6mm.

6. The wireless charging coil for an electronic watch of claim 1, wherein: Both ends of the single coil (21) are provided with wire ends (22), and both wire ends (22) extend to the outside of the substrate (1).

7. The wireless charging coil for an electronic watch according to claim 1, characterized in that: Each inner edge post (32) is fixed with a positioning head (33) at the end away from the sunken arc plate (31), and the width of the positioning head (33) is greater than the width of the inner edge post (32).

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