Bottom support and wearable device

Abstract

The application discloses a bottom support, which comprises a plastic base and a metal plate embedded in the plastic base. The middle part of the plastic base is hollowed out, the plastic base has a first surface for bearing a smart host, the metal plate is embedded in the plastic base and surrounds the hollow part of the plastic base, the metal plate comprises a main plate part and a thickened part arranged on the main plate part, and the thickened part protrudes from the main plate part to the first surface. By arranging the thickened part, the local thickness of the main plate part can be increased, so that the local thickness and the bending stiffness of the metal plate in the stress area can be increased. Meanwhile, compared with the way of increasing the overall structural thickness of the metal plate, the way of locally thickening the main plate part uses less material and is more portable, so that the lightweight design of the bottom support can be realized. In addition, the application also discloses a wearable device with the bottom support.

Description

Technical Field

[0001] This utility model relates to the field of intelligent electronic device technology, and in particular to a bottom bracket and wearable device. Background Technology

[0002] With technological advancements, wearable devices (such as smartwatches and smart bracelets) are becoming increasingly integrated, and their structural reliability directly impacts product lifespan and user experience. Taking a flip-up smartwatch as an example, the bottom support is a crucial component that supports the watch's main unit and allows it to flip. It primarily connects the watch to the strap, ensuring stability during daily wear and use. In related technologies, the bottom support typically employs a secondary injection molding process, embedding a metal plate within a plastic frame. However, when users accidentally press or twist the device during daily use, this bottom support is prone to bending backwards, and in severe cases, may even break. Utility Model Content

[0003] This application discloses a bottom bracket and a wearable device. While achieving the goal of making the wearable device thinner and lighter, it can also improve the overall bending stiffness of the bottom bracket, reduce the probability of the bottom bracket being prone to back bending or breakage, and improve the structural reliability and durability of the bottom bracket.

[0004] To achieve the above objectives, in a first aspect, this application discloses a bottom bracket applied to a wearable device, the wearable device including a smart host, and the bottom bracket comprising:

[0005] A plastic substrate having a first surface along its thickness direction, the first surface being configured to support the smart host, and the plastic substrate having a hollowed-out center to form a ring-shaped structure;

[0006] A metal plate, the metal plate being embedded in the plastic substrate and surrounding the hollow portion of the plastic substrate, the metal plate comprising:

[0007] Main body panel;

[0008] The thickened portion is disposed on one side of the main body plate along the thickness direction of the plastic substrate and protrudes in the direction toward the first surface.

[0009] As an optional implementation, a first opening is provided on the first surface, and the thickened portion at least partially fills the first opening;

[0010] The thickened portion has an upper surface that is away from the main body plate portion, the upper surface being exposed to the first opening and flush with the first surface.

[0011] By creating a first opening on the first surface of the plastic substrate and allowing the thickened portion of the metal sheet to partially fill the first opening, the upper surface of the thickened portion is exposed to the first opening and flush with the first surface. That is, the thickened portion protrudes to the first surface on one side of the main body panel, maximizing the thickness of the protruding portion on one side of the main body panel. This allows the thickened portion to strengthen the structure of the main body panel, effectively improving the overall bending resistance of the metal sheet.

[0012] Meanwhile, this application utilizes the first opening on the first surface, allowing the surface of the thickened portion to be directly exposed to the first opening. If the thickened portion protrudes from the plastic matrix close to the first surface, but the first surface does not have a first opening, the thickness of the plastic matrix covering the surface of the thickened portion may be too thin. This is not conducive to processing, and may also lead to deformation or cracking of the plastic matrix corresponding to the thickened portion during use. In other words, by using the first opening, the thickness of the thickened portion can be maximized while avoiding the risk of indentation, deformation, or even cracking of the plastic surface due to excessively thin plastic matrix on the surface of the thickened portion under stress during use.

[0013] Furthermore, since the metal plate is embedded in the plastic matrix, it is usually formed by a two-stage injection molding process. Therefore, the design of the thickened part exposed to the first opening also allows the surface of the thickened part exposed to the first opening to be used for mold clamping and positioning during the injection molding process of the metal plate and the plastic matrix. This eliminates the need to reserve additional positioning holes on the metal plate for positioning and clamping, which simplifies the structural design of the bottom support and reduces the weakening of the metal plate structure caused by the opening.

[0014] As an optional implementation, the plastic substrate has opposing inner and outer ring sides, the first opening is an annular opening surrounding the hollow portion of the plastic substrate, and the first opening is disposed adjacent to the inner ring side.

[0015] Because the bottom support has a hollow center, when applied to wearable devices, the inner ring side of the bottom support often experiences concentrated stress due to its structure and stress distribution. Therefore, this application addresses this by setting the first opening as an annular opening surrounding the hollowed-out portion of the plastic substrate and positioning it close to the inner ring side. Since the thickened portion at least partially fills this first opening, it effectively strengthens the structure near the hollowed-out portion, thus achieving effective structural reinforcement of the bottom support near this area. Compared to a uniformly reinforced design, this design uses less material and lighter weight to more effectively resist destructive external forces from a specific direction, making the overall bottom support structure design more scientific.

[0016] As an optional implementation, the plastic matrix further includes a second surface along the thickness direction, the second surface including a first plane and a first inclined surface, the first inclined surface being connected to the first plane and inclined in the direction from the inner ring side to the outer ring side, so that the thickness of the plastic matrix on the outer ring side is less than the thickness on the inner ring side;

[0017] The main body plate has a second inclined surface on the side away from the thickened portion. The second inclined surface is disposed corresponding to the first inclined surface, and the second inclined surface extends to the portion of the main body plate near the outer ring side, so that the thickness of the main body plate in the portion corresponding to the inner ring side is greater than the thickness of the main body plate in the portion corresponding to the outer ring side.

[0018] By setting corresponding first and second inclined surfaces on the plastic substrate and the main body plate, the overall structure of the bottom bracket exhibits an inclined shape with gradually decreasing thickness from the inner ring side to the outer ring side. This design not only optimizes the product's visual appearance—for example, when viewing the wearable device from the side, the inclined contour creates a thinner visual effect—but also reduces the contact area between the bottom of the plastic substrate and the skin of the human wrist. This facilitates the dissipation of heat from the wearable device's smart host outwards, reducing heat transfer to the human wrist skin. Furthermore, the synchronized inclined design of the main body plate with the plastic substrate reduces the thickness of the main body plate at corresponding locations, achieving a thinner and lighter bottom bracket design.

[0019] As an optional implementation, the main body plate includes a first plate, a second plate, and a third plate connected in sequence. The first plate extends in a direction close to the inner ring side, the thickened portion is disposed on the second plate, and the third plate extends in a direction close to the outer ring side. In the direction from the inner ring side to the outer ring side, the extension dimension of the first plate is smaller than the extension dimension of the third plate, so that the thickened portion is disposed close to the inner ring side.

[0020] By dividing the main body into a first plate, a second plate, and a third plate, and limiting the extension dimension of the first plate near the inner ring to be smaller than that of the third plate near the outer ring, that is, by placing the thickened second plate closer to the hollowed-out part of the plastic substrate, more metal material is concentrated in the core area that needs to be strengthened. This allows the structure on the outer ring to further optimize the weight distribution while ensuring overall rigidity and strength. This achieves an asymmetrical optimized layout of the thickened part in the cross-section, thereby making the overall structural strength distribution of the bottom support more reasonable.

[0021] As an optional implementation, the metal plate further includes a reinforcing post, which is disposed on the side of the main plate away from the thickened portion, and the reinforcing post is disposed near the hollow portion of the plastic substrate.

[0022] By adding reinforcing columns to the metal plate and placing them on the side of the main plate facing away from the thickened portion and close to the inner ring, additional support points are provided for the bottom of the metal plate, thereby improving the bottom support's ability to resist impact or complex torsional loads. Furthermore, the reinforcing columns and the thickened portion are respectively positioned on both sides of the main plate along the thickness direction of the plastic substrate, and close to the perforated portion of the plastic substrate. This allows the reinforcing columns and the thickened portion to jointly improve the structural strength of the main plate at the main stress points, further optimizing the structural strength distribution of the bottom support.

[0023] Furthermore, the reinforcing column increases the contact area between the main body plate and the plastic substrate, thereby improving the stability of their fit. Simultaneously, the reinforcing column also plays a positioning role during the injection molding process of the metal plate and the plastic substrate, enabling structural reuse.

[0024] As an alternative implementation, the projection of the reinforcing column onto the surface of the main body plate is at least partially located within the area of ​​the thickened portion on the surface of the main body plate.

[0025] By designing a layout where the projection of the bottom reinforcing column at least partially overlaps with the area of ​​the top thickened section, the top thickened section, the middle main plate, and the bottom reinforcing column form a coaxial load transfer path in the vertical direction. That is, these three elements together constitute a bending section along the thickness direction of the bottom support, thereby using the reinforcing column and the thickened section to jointly improve the structural strength of the main plate at the main stress points, further strengthening the structural strength distribution of the bottom support.

[0026] As an optional implementation, along the thickness direction of the plastic substrate, the sum of the thicknesses of the main body plate and the thickened portion is T1, and the thickness of the plastic substrate is T2, satisfying: 0.5 ≤ T1 / T2 ≤ 1; and / or,

[0027] The total width of the plastic matrix is ​​H1, and the width from the inner ring side to the outer ring side of the plastic matrix is ​​H2, satisfying: 0.1 ≤ H2 / H1 ≤ 0.3; and / or,

[0028] The width of the thickened portion is H3, and the width of the main plate portion is H4, satisfying: 0.2≤H3 / H4≤0.8.

[0029] By limiting the ratio of the sum of the thicknesses of the main body plate and the thickened portion (T1) to the thickness of the plastic substrate (T2), the thickness of the metal plate relative to the plastic substrate can be reasonably controlled. This achieves structural reinforcement of the metal plate while also facilitating the molding process of both the metal plate and the plastic substrate. If the ratio is too small, the thickness of the metal plate will be insufficient, failing to achieve the desired reinforcement effect; if the ratio is too large, the plastic substrate's coating layer on the metal plate will be too thin, potentially leading to injection molding difficulties and incomplete metal plate coverage, making the plastic substrate prone to breakage during use. Therefore, this application, by controlling the ratio of T1 to T2 within the aforementioned range, achieves sufficient structural strength in the metal plate to provide core support while ensuring sufficient thickness in the plastic substrate for reliable coating and a good appearance.

[0030] By limiting the range of the ratio between the ring width H2 and the total width H1 of the plastic substrate, the width of the hollow part of the plastic substrate can be reasonably controlled. This allows the plastic substrate to have a sufficient ring width to provide stable support for the smart host of the wearable device, while also effectively controlling the ring width of the plastic substrate to prevent it from being too wide, thus keeping the overall bottom bracket design thin, light, and miniaturized.

[0031] When the width H3 of the thickened portion and the width H4 of the main plate satisfy the above-mentioned proportional relationship, the thickened portion can provide a strengthening effect without causing stress concentration due to excessive narrowness, while also ensuring that the main plate has sufficient width to distribute the load.

[0032] As an optional implementation, the sum of the thicknesses of the main body plate and the thickened portion, T1, satisfies: 1.4mm ≤ T1 ≤ 2.3mm, and the thickness T2 of the plastic substrate satisfies: 1.95mm ≤ T2 ≤ 2.65mm; and / or,

[0033] The total width H1 of the plastic substrate satisfies: 27.5mm ≤ H1 ≤ 36.5mm, and the width H2 from the inner ring side to the outer ring side of the plastic substrate satisfies: 3.2mm ≤ H2 ≤ 8.5mm; and / or,

[0034] The width H3 of the thickened portion satisfies: 0.3mm≤H3≤0.9mm, and the width H4 of the main plate portion satisfies: 0.8mm≤H4≤1.6mm.

[0035] By limiting the sum of the thicknesses of the main plate and the thickened section, T1, sufficient structural thickness is ensured for the metal plate, thus guaranteeing that it is both lightweight and possesses a certain degree of strength and rigidity. If T1 is too small, the moment of inertia of the metal plate's cross-section will be insufficient, causing it to easily undergo plastic deformation under typical loads such as "figure-eight compression" or "three-point bend," failing to achieve the desired reinforcement effect. If T1 is too large, it will result in excessive metal usage, increasing costs and making the bottom support bulky.

[0036] By limiting the thickness T2 of the plastic substrate, the reliability and appearance integrity of the wearable device can be ensured. If T2 is too small, it may not be able to completely cover the metal plate and will be prone to wear during use. If T2 is too large, the entire bottom support will be too thick and heavy, affecting wearing comfort.

[0037] By limiting the total width H1 of the plastic substrate, the compatibility between the bottom support and the smart host is ensured. The limited range of H1 provides a sufficiently stable support platform for the smart host without exceeding the design limits of the human wrist in conventional wearable devices.

[0038] By limiting the width H2 from the inner ring side to the outer ring side of the plastic substrate, sufficient space is reserved for the functional components of the smart host (such as sensors) while ensuring the ring itself has sufficient strength. If H2 is too small, its cross-sectional area will be insufficient to bear the load, making it prone to breakage during use. If H2 is too large, it will excessively encroach on the hollow area in the middle.

[0039] By limiting the width H3 of the thickened section, the strengthening effect on bending stiffness is ensured. If H3 is too small, the contribution of the thickened section to the moment of inertia of the metal plate section will be too small. If H3 is too large, it will occupy too much of the overall width of the metal plate, making the bottom support bulky.

[0040] By limiting the width H4 of the main plate, the force from the thickened part is effectively transmitted and distributed to the entire metal plate, making the metal plate less prone to local buckling. This ensures that the bottom support still has good bending stiffness and strength when bent backward.

[0041] Secondly, this application also discloses a wearable device, including a smart host, wearable components, and a bottom support as described in the first aspect, wherein the smart host is rotatably connected to the bottom support, and the wearable components are connected to the bottom support.

[0042] The wearable device disclosed in this application uses the bottom bracket as described above. Because the bottom bracket possesses the aforementioned characteristics of high rigidity, high strength, and thinness, the wearable device also exhibits the beneficial effects corresponding to the bottom bracket, enabling it to withstand various impacts and pressure issues encountered during daily use, thereby reducing the after-sales repair rate due to structural damage to the bottom bracket.

[0043] Compared with the prior art, the beneficial effects of this application are:

[0044] The bottom bracket and wearable device provided in this application have a metal plate embedded in a ring-shaped plastic substrate, with the metal plate comprising a main body and a thickened portion protruding along the first surface of the plastic substrate. By utilizing the thickened portion, the local thickness of the main body can be increased, thereby increasing the overall structural strength of the metal plate and improving its bending stiffness. Furthermore, compared to increasing the overall thickness of the metal plate, this method of locally thickening the main body uses less material and is lighter, enabling a thinner and lighter design for the bottom bracket. Therefore, the bottom bracket of this application solves the problem of wearable devices being prone to bending and deformation due to external forces while pursuing thinness and lightness, effectively improving the structural reliability and durability of the bottom bracket. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram illustrating the forces acting on a wearable device in a specific scenario within a related technology.

[0047] Figure 2 This is a schematic diagram illustrating the forces acting on wearable devices in related technologies under different conditions;

[0048] Figure 3 This is a schematic diagram of the structural design of the bottom support of a wearable device in related technologies;

[0049] Figure 4 This is a schematic diagram of the wearable device disclosed in this application in one posture;

[0050] Figure 5 This is a structural schematic diagram of the wearable device disclosed in this application in another posture;

[0051] Figure 6 This is a schematic diagram of the bottom support structure disclosed in the embodiments of this application;

[0052] Figure 7 This is an exploded view of the bottom support structure disclosed in the embodiments of this application;

[0053] Figure 8 This is a top view of the bottom bracket disclosed in the embodiments of this application;

[0054] Figure 9 yes Figure 8 A cross-sectional view of the bottom support in the AA direction;

[0055] Figure 10 This is a schematic diagram of the structure of the metal plate disclosed in the embodiments of this application from one view.

[0056] Figure 11 This is a schematic diagram of the metal plate disclosed in the embodiments of this application from another perspective.

[0057] Explanation of reference numerals in the attached figures:

[0058] Wearable devices - 100; Base bracket - 10; Smart host - 20; Wearable components - 30;

[0059] Plastic substrate - 11; First surface - 111; Hollowed-out portion - 112; First opening - 113;

[0060] Inner ring side - 114; Outer ring side - 115; Second surface - 116; First plane - 1161; First inclined surface - 1162;

[0061] Metal plate-12; Main body plate-121; Second inclined surface-1211; First plate-1212; Second plate-1213; Third plate-1214; Thickened part-122; Upper surface-1221; Reinforcing column-123;

[0062] The sum of the thicknesses of the main body plate and the thickened part - T1; the thickness of the plastic substrate - T2; the total width of the plastic substrate - H1; the width from the inner ring side to the outer ring side of the plastic substrate - H2; the width of the thickened part - H3; the width of the main body plate - H4. Detailed Implementation

[0063] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] In this application, the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0065] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0066] Furthermore, the terms "installation," "setting," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0067] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0068] Before explaining the technical solution of this application, the background of the inventive concept of this application will be explained first.

[0069] As described in the background art of the present application, for a wearable device 100, such as a smart watch, the bottom bracket 10 included in the smart watch is a key component for carrying the smart host 20. When the user accidentally presses and twists during daily use, the bottom bracket 10 is prone to back bending, and in severe cases, it may even cause fracture damage. Through market research and user feedback analysis, it is found that the main failure scenarios of the bottom bracket 10 are roughly the following two ways.

[0070] Please refer to Figure 1 , Figure 1 for a schematic diagram showing the damage of the bottom bracket 10 under a certain force condition, as Figure 1 shown. This force application method is roughly in the form of "downward pressure in an eight-character shape". Specifically, the damage method of "downward pressure in an eight-character shape" usually occurs when the user removes the smart watch and the smart host 20 is opened at a certain angle relative to the bottom bracket 10, such that both the bottom bracket 10 and the smart host 20 are in contact with a plane and there are contact points with the plane. In this case, an excessive pressing force is applied to the rotating structure (such as the shaft) connecting the bottom bracket 10 and the smart host 20. Under the action of this pressing force, since the stiffness of the bottom bracket 10 is weaker than that of the smart host 20, the acting force will be concentrated at the connection between the bottom bracket 10 and the rotating structure, causing the bottom bracket 10 to bear complex bending and torsional loads, and then undergoing plastic deformation in a shape similar to the Chinese character "八" (eight). In severe cases, it may even lead to the fracture of the bottom bracket 10.

[0071] Please refer to Figure 2 , Figure 2 for a schematic diagram showing the damage of the bottom bracket 10 under a certain force condition, as Figure 2 shown. This force application method is the damage method of "three-point bending". Specifically, the damage method of "three-point bending" means that when the user wears the smart watch too tightly on the wrist, the middle part of the bottom bracket 10 will be lifted by the wrist bone, and both ends will be tightened by the watch strap, forming a typical three-point force application. This situation is also common when the smart watch falls and the middle part of the bottom bracket 10 happens to hit a raised hard object. In this case, the middle part of the bottom bracket 10 will bear concentrated bending stress and is extremely prone to excessive bending deformation.

[0072] To address the issue of easy deformation and damage to the bottom support 10 caused by the aforementioned two damage methods, the inventors conducted a detailed study. Since the bottom support 10 is typically hollowed out in the middle, it mainly comprises a plastic substrate 11 and a metal plate 12 embedded within the plastic substrate 11. The metal plate 12 is usually a flat shape of uniform thickness, located approximately in the middle of the thickness direction of the plastic substrate 11; that is, the thickness distribution of the plastic substrate 11 on both sides of the metal plate 12 is uniform. The structural strength of the bottom support 10 primarily originates from the internal metal plate 12. Based on this, the inventors attempted to optimize the structure of the metal plate 12.

[0073] For example, such as Figure 3 As shown, Figure 3 Figure (a) shows a schematic diagram of a flat metal plate 12 of uniform thickness horizontally embedded inside a plastic substrate 11. It can be seen that the metal plate 12 is flat with uniform thickness, and both its upper and lower surfaces are parallel to the surface of the plastic substrate 11 (hereinafter referred to as Scheme 1). Scheme 1 is the most commonly used scheme in the prior art. Based on Scheme 1, the inventors conducted stress simulations under "figure-eight downward pressure" and "three-point bend" stress conditions, and found that the bottom support 10 exhibited significant deformation and yield stress.

[0074] Therefore, the inventors attempted to optimize the originally flat metal plate 12 in the thickness direction of the plastic substrate 11. Please refer to [link to relevant documentation]. Figure 3 In (b), Figure 3 In (b), the portion of the metal plate 12 corresponding to the middle position of the plastic substrate 11 is slightly arched towards the upper surface of the plastic substrate 11 (the side used to support the smart host 20), so that the plastic thickness covering the upper part of the metal plate 12 (mainly the middle position of the metal plate 12) is thinner than the plastic thickness covering the lower part of the metal plate 12 (mainly the middle position of the metal plate 12) in the thickness direction of the plastic substrate 11 (hereinafter referred to as Scheme 2). However, after stress simulation, it was found that Scheme 2 still exhibits significant deformation and yield stress under the aforementioned "figure-eight compression" and "three-point bend" stress conditions.

[0075] Based on this, the inventors continued to attempt to slightly arch the portion of the metal plate 12 at the middle position of the corresponding substrate 11 towards the lower surface of the plastic substrate 11 (the side for contacting the skin of the human wrist). Figure 3As shown in (c), the plastic thickness covering the upper part (mainly the middle part of the metal plate 12) is greater than the plastic thickness covering the lower part (mainly the middle part of the metal plate 12) in the thickness direction of the plastic substrate 11 (hereinafter referred to as Scheme 3). However, after stress simulation, it was found that Scheme 3 still exhibits significant deformation and yield stress under the aforementioned "figure-eight compression" and "three-point bend" stress conditions, and the load-bearing effect of Scheme 3 is even worse than that of Scheme 2.

[0076] Since the arched design at the center of the metal plate 12 resulted in unsatisfactory stress distribution, the inventors continued their efforts, attempting improvements from both ends of the metal plate 12. For example, as... Figure 3 As shown in (d), by placing one end of the metal plate 12 at the pivot of the bottom support 10 close to the lower surface of the plastic substrate 11 (the side that contacts the skin of the human wrist), the metal plate 12 is tilted in the plastic substrate 11 (hereinafter referred to as scheme 4). However, after stress simulation, it was found that even with the improvement of the positions of the two ends of the metal plate 12, there is still obvious deformation and yield stress.

[0077] In view of this, this application discloses a bottom support 10, which no longer regards the metal plate 12 as a simple two-dimensional planar reinforcement. Instead, the metal plate 12 is redesigned into a composite structure including a main plate portion 121 and a thickened portion 122. By using the thickened portion 122, the local thickness of the main plate portion 121 is increased, thereby increasing the overall structural strength of the metal plate 12. This solves the problem that the bottom support 10 is prone to deformation and damage under the damage modes of "figure-eight downward pressure" and "three-point bend", effectively improving the structural reliability and durability of the bottom support 10.

[0078] Please see Figure 4 and Figure 5 Before introducing the structure of the bottom support 10, let's first introduce the basic structure of the wearable device 100.

[0079] like Figure 4 As shown, the wearable device 100 includes a smart host 20, a wearable component 30, and a bottom bracket 10. The smart host 20 and the wearable component 30 are both connected to the bottom bracket 10.

[0080] The wearable device 100 may include, but is not limited to, smartwatches and smart bracelets. Taking a smartwatch as an example, the smart host 20 is the watch face, and the bottom bracket 10 is the support plate that supports the watch face. The wearable component 30 may be a watch strap, rotatably connected to both ends of the bottom bracket 10 to enable wearing the smartwatch. Of course, the wearable component 30 may also be a neckband, allowing the smartwatch to be worn around the neck.

[0081] In some embodiments, the smart host 20 is rotatably connected to one end of the bottom support 10. For example, it can be rotatably connected to one end of the bottom support 10 via a pivot, allowing the smart host 20 to rotate relative to the bottom support 10. Typically, the smart host 20 can have two postures relative to the bottom support 10. One posture is that the smart host 20 is stacked on the bottom support 10, in which case the bottom support 10 completely supports the smart host 20 (e.g., ...). Figure 4 (As shown). Another orientation is that the smart host 20 can rotate and open relative to the bottom bracket 10, at which point the smart host 20 and the bottom bracket 10 form a certain angle (e.g., Figure 5 (As shown).

[0082] The structure of the bottom support 10 will be described in detail below.

[0083] Please see Figures 6 to 9 ,in, Figure 6 This is a schematic diagram of the structure of the bottom support 10 disclosed in the embodiments of this application. Figure 7 This is an exploded view of the bottom support 10 disclosed in the embodiments of this application. Figure 8 This is a top view of the bottom support 10 disclosed in the embodiments of this application. Figure 9 yes Figure 8 The bottom support 10 is shown in a cross-sectional view along the AA direction. The bottom support 10 includes a plastic substrate 11 and a metal plate 12. The plastic substrate 11 has a first surface 111 along its thickness direction, configured to support the smart host 20. The plastic substrate 11 has a hollowed-out portion in the middle, forming a ring structure. The metal plate 12 is embedded in the plastic substrate 11 and surrounds the hollowed-out portion 112 of the plastic substrate 11. The metal plate 12 also includes a main plate portion 121 and a thickened portion 122. The thickened portion 122 is disposed on the main plate portion 121 along the thickness direction of the plastic substrate 11 (e.g., ...). Figure 6 It protrudes from one side in the Z direction and in the direction toward the first surface 111.

[0084] In this embodiment, the bottom support 10 includes a plastic substrate 11 and a metal plate 12. The plastic substrate 11 has a ring-shaped hollow structure in the middle. The presence of the hollow structure provides space for components such as sensors and charging contacts at the bottom of the smart host 20, avoiding interference between structures, and also reduces the amount of plastic material used, thus initially achieving weight reduction. At the same time, the metal plate 12 is embedded in the plastic substrate 11 and surrounds the hollow portion 112, so that the metal plate 12 can provide structural support for the plastic substrate 11, thereby constraining the deformation of the plastic substrate 11.

[0085] It is understandable that the main body plate 121 of the metal plate 12 serves as the basic load-bearing part, mainly used to distribute the load transmitted by the host. The thickened part 122 is provided on the side of the main body plate 121 facing the first surface 111 along the thickness direction and protrudes. This design is to increase the local thickness of the main body plate 121 by using the thickened part 122, thereby increasing the overall structural strength of the metal plate 12. This helps to improve the bending stiffness of the overall structure of the metal plate 12, and thus solves the structural stability problem under the damage modes of "figure-eight downward pressure" and "three-point bend".

[0086] Furthermore, compared to the overall thickening of the metal plate 12, this application adopts a localized thickening design, using less metal and making it lighter, thereby achieving a thinner and lighter design for the bottom bracket 10 and avoiding the situation where the overall weight of the device is increased due to increased strength. In addition, the interlocking of the metal plate 12 and the plastic substrate 11 can also prevent the plastic substrate 11 from developing indentations or cracks under long-term stress, which not only improves the structural reliability and durability of the bottom bracket 10, but also extends the overall service life of the wearable device 100.

[0087] It is understood that the ring structure of the plastic substrate 11 can be determined according to the overall appearance and internal component layout of the wearable device 100. For example, the ring can be a circular ring, a square ring, etc. This embodiment does not make specific limitations on this.

[0088] In some embodiments, such as Figures 6 to 10 As shown, a first opening 113 is provided on the first surface 111, and the thickened portion 122 at least partially fills the first opening 113. The thickened portion 122 has an upper surface 1221 that is away from the main body plate portion 121, and the upper surface 1221 is exposed to the first opening 113 and is flush with the first surface 111.

[0089] Specifically, by providing a first opening 113 on the first surface 111 of the plastic substrate 11 and at least partially filling it with the thickened portion 122 of the metal plate 12, the structural performance of the bottom support 10 is further optimized. The opening 113 provides space for the thickened portion 122, allowing it to extend along the thickness direction of the plastic substrate 11 towards the first surface 111. Since the upper surface 1221 of the thickened portion 122 is exposed to the first opening 113 and flush with the first surface 111, the thickness of the thickened portion 122 protruding on one side of the main plate portion 121 is maximized without increasing the overall thickness of the bottom support 10, thereby enhancing the bending moment of inertia of the metal plate 12.

[0090] Meanwhile, by utilizing the first opening 113 on the first surface 111, this application allows the surface of the thickened portion 122 to be directly exposed to the first opening 113. If the thickened portion 122 protrudes from the plastic substrate 11 close to the first surface 111, but the first surface 111 does not have the first opening 113, the thickness of the plastic substrate 11 covering the surface of the thickened portion 122 may be too thin. This would be detrimental to processing and could lead to deformation or cracking of the plastic substrate 11 corresponding to the thickened portion 122 during use. In other words, by utilizing the first opening 113, the thickness of the thickened portion 122 can be maximized while avoiding the risk of indentation, deformation, or even cracking of the plastic surface due to excessively thin plastic substrate 11 on the surface of the thickened portion 122 under stress during use.

[0091] Furthermore, since the metal plate 12 is embedded in the plastic substrate 11, it is usually formed by a two-stage injection molding process. Therefore, the design of the thickened portion 122 being exposed to the first opening 113 also allows the surface of the thickened portion 122 exposed to the first opening 113 to be used for mold clamping and positioning during the injection molding process of the metal plate 12 and the plastic substrate 11. This eliminates the need to reserve additional positioning holes on the metal plate 12 for positioning and clamping, simplifying the structural design of the bottom support 10 and reducing the weakening of the metal plate 12 structure caused by the opening.

[0092] Understandably, the extent to which the thickened portion 122 fills the first opening 113 can be adjusted according to the strength requirements of the bottom support 10. It can be partially filled to retain local support for the plastic substrate 11, or it can be completely filled to maximize the continuity of the metal structure.

[0093] In some embodiments, such as Figure 6 and Figure 7 As shown, the plastic substrate 11 has an inner ring side 114 and an outer ring side 115, and the first opening 113 is an annular opening surrounding the hollow portion 112 of the plastic substrate 11, and the first opening 113 is disposed adjacent to the inner ring side 114.

[0094] Specifically, the plastic substrate 11 has an inner ring side 114 (the side closer to the central hollow portion 112) and an outer ring side 115 (the side farther from the hollow portion 112). Since the bottom support 10 has a hollow portion in the middle, the pressing load that the wearable device 100 bears daily will make the inner ring side 114 a stress concentration area. This is because the inner ring side 114 area has a small support area and a short lever arm, making it prone to local deformation or breakage. Based on this, in this embodiment, the first opening 113 is set as an annular opening surrounding the hollow portion 112 of the plastic substrate 11, and it is set close to the inner ring side 114. In this way, the thickened portion 122 filling the first opening 113 can work in tandem with the annular opening to surround the hollow portion 112 and be close to the stress concentration area, thereby directly strengthening the most vulnerable inner ring side 114 and avoiding bending or breakage of the bottom support 10 caused by stress concentration.

[0095] Compared to the uniform reinforcement design where the first opening 113 is evenly distributed from the inner ring side 114 to the outer ring side 115, this application positions the main body plate 121 and the thickened portion 122 close to the inner ring side 114, thereby effectively strengthening the bottom support 10 near the hollow portion 112. This allows the bottom support 10 to achieve efficient deformation resistance with less metal usage and a lighter overall weight. Simultaneously, the annular opening ensures the thickened portion 122 continuously surrounds the hollow portion 112, avoiding localized weak points caused by discontinuous reinforcement, and making the structural design of the bottom support 10 more aligned with actual stress requirements.

[0096] In some embodiments, such as Figures 6 to 9 As shown, the plastic substrate 11 further includes a second surface 116 along the thickness direction. The second surface 116 includes a first plane 1161 and a first inclined surface 1162. The first inclined surface 1162 is connected to the first plane 1161 and is inclined in the direction from the inner ring side 114 to the outer ring side 115, so that the thickness of the plastic substrate 11 on the outer ring side 115 is less than the thickness of the inner ring side 114. The main body plate portion 121 has a second inclined surface 1211 on the side away from the thickened portion 122. The second inclined surface 1211 is provided corresponding to the first inclined surface 1162, and the second inclined surface 1211 extends to the portion of the main body plate portion 121 near the outer ring side 115, so that the thickness of the main body plate portion 121 in the portion corresponding to the inner ring side 114 is greater than the thickness of the main body plate portion 121 in the portion corresponding to the outer ring side 115.

[0097] Specifically, the plastic substrate 11 has a second surface 116 along its thickness direction that is opposite to the first surface 111. The second surface 116 includes a first plane 1161 and a first inclined surface 1162. The first plane 1161 is located in the region near the inner ring side 114, providing stable support for the main body plate portion 121. The first inclined surface 1162 connects to the first plane 1161 and is inclined along the direction from the inner ring side 114 to the outer ring side 115. This design makes the thickness of the plastic substrate 11 gradually decrease from the inner ring side 114 to the outer ring side 115, thereby avoiding the bottom support 10 from becoming too heavy due to the excessive thickness of the outer ring side 115.

[0098] In addition, the main body plate 121 has a second inclined surface 1211 on the side opposite to the thickened part 122, which corresponds to the first inclined surface 1162. The second inclined surface 1211 extends to the part of the main body plate 121 near the outer ring side 115, so that the thickness of the main body plate 121 also presents the same distribution as the plastic substrate 11. Since the inner ring side 114 is a stress concentration area, the inner ring side 114 of the main body plate 121 is thicker to ensure sufficient strength, while the outer ring side 115 is thinner to reduce the amount of metal used.

[0099] This tilted design, on the one hand, gives the bottom bracket 10 a gradient contour on the side, achieving a visually slimmer effect and meeting the aesthetic requirements of the wearable device 100. On the other hand, the tilted structure of the second surface 116 also reduces the contact area between the bottom of the plastic substrate 11 and the skin of the human wrist, thereby facilitating the dissipation of heat from the smart host 20 of the wearable device 100 and reducing heat transfer to the skin of the human wrist. At the same time, the tilted design of the main body plate 121 reduces the amount of metal used while ensuring strength, further achieving a slimmer bottom bracket 10 and avoiding an increase in overall weight due to structural reinforcement.

[0100] In some embodiments, such as Figure 8 As shown, the main body plate 121 includes a first plate 1212, a second plate 1213, and a third plate 1214 connected in sequence. The first plate 1212 extends in a direction close to the inner ring side 114. A thickened portion 122 is disposed on the second plate 1213. The third plate 1214 extends in a direction close to the outer ring side 115. In the direction from the inner ring side 114 to the outer ring side 115, the extension dimension of the first plate 1212 is smaller than the extension dimension of the third plate 1214, so that the thickened portion 122 is disposed close to the inner ring side 114.

[0101] Specifically, the main body plate 121 is sequentially connected into a first plate 1212, a second plate 1213, and a third plate 1214. The first plate 1212 extends along the direction close to the inner ring side 114, and the third plate 1214 extends along the direction close to the outer ring side 115. A thickened portion 122 is disposed in the middle of the second plate 1213. This arrangement allows the second plate 1213 with the thickened portion 122 to be positioned closer to the hollow portion 112 of the plastic substrate 11, thereby concentrating more metal material in the core area that needs reinforcement. Furthermore, the extension dimension of the first plate 1212 is limited to be smaller than that of the third plate 1214 along the direction from the inner ring side 114 to the outer ring side 115. Since the inner ring side 114 is a stress concentration area, the smaller size of the first plate 1212 shortens the load transfer path, allowing the thickened portion 122 to be closer to the stress concentration area, thereby enhancing the structural reinforcement effect.

[0102] Furthermore, the outer ring side 115 experiences lower stress, while the larger extension dimension of the third plate 1214 expands the load distribution range, preventing load concentration at the connection between the plastic substrate 11 and the metal plate 12, thus reducing the risk of localized cracking. This asymmetrical design concentrates metal material near the inner ring side 114, which requires reinforcement, while the outer ring side 115 distributes the load through a longer plate rather than adding material. This ensures the overall rigidity of the bottom support 10 while avoiding waste of metal material, further optimizing weight distribution and meeting the requirements for a thinner and lighter wearable device 100.

[0103] In some embodiments, such as Figure 10 As shown, the metal plate 12 also includes a reinforcing post 123, which is disposed on the side of the main plate portion 121 away from the thickened portion 122, and the main reinforcing post 123 is disposed near the hollow portion 112 of the plastic substrate 11.

[0104] Specifically, by setting a reinforcing post 123 and placing the reinforcing post 123 on the side of the main body plate 121 away from the thickened part 122 and close to the hollow part 112 of the plastic substrate 11, this position can accurately correspond to the stress concentration area of ​​the inner ring side 114, providing an additional support point for the bottom of the main body plate 121. For example, when the bottom bracket 10 is subjected to impact load (such as the wearable device 100 falling) or torsional load (such as wrist twisting when wearing), the reinforcing post 123 can disperse the local pressure of the main body plate 121, thereby improving the ability of the bottom bracket 10 to resist such complex loads and preventing the main body plate 121 from bending and deforming due to excessive force on one side.

[0105] Meanwhile, the reinforcing column 123 and the thickened part 122 are respectively arranged on both sides of the main plate 121 along the thickness direction of the plastic substrate 11, and are also arranged close to the hollow part 112 of the plastic substrate 11. This allows the reinforcing column 123 and the thickened part 122 to jointly improve the structural strength of the main plate 121 in the main stress parts, and further optimize the structural strength distribution of the bottom support 10.

[0106] In addition, the setting of the reinforcing post 123 can increase the contact area between the main body plate 121 and the plastic substrate 11, thereby improving the fitting stability of the main body plate 121 and the plastic substrate 11.

[0107] It is understandable that during the injection molding process of the metal plate 12 and the plastic substrate 11, the reinforcing column 123 can cooperate with the positioning groove of the mold to help fix the position of the metal plate 12 and prevent the metal plate 12 from shifting due to injection pressure. Thus, the metal plate 12 can be stabilized without relying on other positioning structures.

[0108] Understandably, the number of reinforcing columns 123 can be adjusted according to the size and load requirements of the plastic substrate 11. They can be evenly distributed around the hollow part 112 or concentrated in areas where stress is more concentrated.

[0109] In some embodiments, the projection of the reinforcing post 123 onto the surface of the main body plate portion 121 is at least partially located within the area of ​​the thickened portion 122 on the surface of the main body plate portion 121.

[0110] Specifically, by designing a layout in which the projection of the bottom reinforcing column 123 at least partially overlaps with the area of ​​the top thickened portion 122, the top thickened portion 122, the middle main plate portion 121, and the bottom reinforcing column 123 form a coaxial load transfer path in the vertical direction. That is, these three together constitute a bending section that runs through the thickness direction of the bottom support 10, allowing the reinforcing column 123 and the thickened portion 122 to jointly improve the structural strength of the main plate portion 121 at the main stress points, further strengthening the structural strength distribution of the bottom support 10.

[0111] In some embodiments, such as Figure 8 and Figure 9 As shown, along the thickness direction of the plastic substrate 11, the sum of the thicknesses of the main body plate portion 121 and the thickened portion 122 is T1, and the thickness of the plastic substrate 11 is T2, satisfying 0.5≤T1 / T2≤1.

[0112] T1 is the effective total thickness of the metal plate 12 at the thickened portion 122, which directly determines the supporting strength of the metal plate 12. T2 is the overall thickness of the plastic substrate 11, which affects the reliability and appearance of the plastic covering the metal plate 12. By limiting the ratio of T1 to T2, the thickness of the metal plate 12 relative to the plastic substrate 11 can be reasonably controlled, thereby strengthening the structure of the metal plate 12 while also making the molding process of the metal plate 12 and the plastic substrate 11 easier to implement. For example, if T1 / T2 < 0.5, it means that the total thickness of the metal plate 12 is too thin relative to the plastic substrate 11, and the moment of inertia of the metal plate 12 is insufficient, failing to provide sufficient bending support for the bottom support 10. Under loads such as "figure-eight" or "three-point bend," it is prone to bending and deformation, failing to achieve the expected reinforcement effect. If T1 / T2 > 1, the total thickness of the metal plate 12 exceeds the thickness of the plastic substrate 11, resulting in the plastic substrate 11 covering the metal plate 12 too thinly. This can easily lead to defects such as material shortages and air bubbles during injection molding, and the thin plastic layer is easily damaged by friction during use, affecting the durability and appearance of the bottom support 10. Therefore, controlling the ratio between 0.5 and 1 ensures that the metal plate 12 has sufficient thickness to provide core support, effectively improving bending stiffness, while also ensuring that the plastic substrate 11 has sufficient thickness to reliably cover the metal plate 12, avoiding process defects and breakage during use.

[0113] In some embodiments, the total width of the plastic substrate 11 is H1, and the width from the inner ring side 114 to the outer ring side 115 of the plastic substrate 11 is H2, satisfying: 0.1≤H2 / H1≤0.3.

[0114] The total width H1 of the plastic substrate 11 is the overall span from the inner ring side 114 to the outer ring side 115, and the width H2 from the inner ring side 114 to the outer ring side 115 is the actual support width of the ring structure. Limiting the width to 0.1≤H2 / H1≤0.3 allows for reasonable control of the width of the hollow portion 112 of the plastic substrate 11. This ensures that the plastic substrate 11 has sufficient ring width to provide stable support for the smart host 20 of the wearable device 100, while also effectively controlling the ring width of the plastic substrate 11 to prevent it from becoming too wide, thus maintaining the overall thin and compact design of the bottom bracket 10. For example, if the H2 / H1 ratio is less than 0.1, an excessively narrow H2 will result in insufficient support area for the ring structure of the plastic substrate 11, making it unable to stably support the weight of the smart host 20 and prone to ring structure breakage. If the H2 / H1 ratio is greater than 0.3, the excessive width of H2 will encroach on the internal space of the plastic substrate 11, resulting in no installation position for components such as the bottom sensor and charging module of the smart host 20, thus disrupting functional coordination.

[0115] In some embodiments, the width of the thickened portion 122 is H3, and the width of the main body plate portion 121 is H4, satisfying: 0.2≤H3 / H4≤0.8.

[0116] The width H3 of the thickened portion 122 and the width H4 of the main plate portion 121 are limited to 0.2 ≤ H3 / H4 ≤ 0.8. This ensures that the thickened portion 122 provides reinforcement without causing stress concentration due to excessive narrowness, while also ensuring that the main plate portion 121 has sufficient width to distribute the load. For example, if the ratio is less than 0.2, an excessively narrow H3 will cause stress concentration in the thickened portion 122, making it prone to cracking during bending; if the ratio is greater than 0.8, an excessively narrow H4 will result in insufficient load distribution capacity of the main plate portion 121, making it unable to effectively transfer the force to the outer ring side 115.

[0117] In some embodiments, the sum of the thicknesses of the main body plate portion 121 and the thickened portion 122, T1, satisfies the following condition: 1.4mm ≤ T1 ≤ 2.3mm.

[0118] By limiting the sum of the thicknesses T1 of the main plate 121 and the thickened portion 122, the metal plate 12 is ensured to have sufficient structural thickness, thereby ensuring that the metal plate 12 is both lightweight and thin while maintaining a certain strength and rigidity. If T1 is too small, the moment of inertia of the metal plate 12 section will be insufficient, causing it to easily undergo plastic deformation when subjected to loads such as "figure-eight compression" or "three-point bend," failing to achieve the expected reinforcement effect. If T1 is too large, it will result in excessive metal usage, not only increasing costs but also making the bottom support 10 bulky.

[0119] In some embodiments, the thickness T2 of the plastic substrate 11 satisfies 1.95mm ≤ T2 ≤ 2.65mm. By limiting the thickness T2 of the plastic substrate 11, the reliability and appearance integrity of the wearable device 100 can be ensured. If T2 is too small, it may not be able to completely cover the metal plate 12, and it will also be prone to wear during use. If T2 is too large, it will make the entire bottom support 10 too thick and heavy, affecting wearing comfort.

[0120] In some embodiments, the total width H1 of the plastic substrate 11 satisfies: 27.5mm ≤ H1 ≤ 36.5mm. By limiting the total width H1 of the plastic substrate 11, the compatibility between the bottom support 10 and the smart host 20 is ensured. The limited range of H1 provides a sufficiently stable support platform for the smart host 20 without exceeding the design range of a conventional human wrist.

[0121] In some embodiments, the width H2 of the plastic substrate 11 from the inner ring side 114 to the outer ring side 115 satisfies: 3.2mm ≤ H2 ≤ 8.5mm. By limiting the width H2 of the plastic substrate 11 from the inner ring side 114 to the outer ring side 115, sufficient space is reserved for functional components while ensuring sufficient strength of the ring itself. If H2 is too small, its cross-sectional area will be insufficient to bear the load, making it prone to breakage during use. If H2 is too large, it will excessively encroach on the hollow area in the middle.

[0122] In some embodiments, the width H3 of the thickened portion 122 satisfies: 0.3mm ≤ H3 ≤ 0.9mm. By limiting the width H3 of the thickened portion 122, the strengthening effect of bending stiffness is ensured. If H3 is too small, the contribution of the thickened portion 122 to the moment of inertia of the lifting metal plate 12 section is too small. If H3 is too large, it will occupy too much of the overall width of the metal plate 12, making the bottom support 10 bulky.

[0123] In some embodiments, the width H4 of the main plate portion 121 satisfies: 0.8mm ≤ H4 ≤ 1.6mm. By limiting the width H4 of the main plate portion 121, it is ensured that the force from the thickened portion 122 can be effectively transmitted and distributed throughout the entire metal plate 12, thereby making the metal plate 12 less prone to local buckling, and thus ensuring that the bottom support 10 still has good bending stiffness and strength when bent backward.

[0124] The following will describe the stress conditions of the bottom support 10 using this application and the use of... Figure 3 The stress conditions of methods 1 to 4 are compared and explained.

[0125] Specifically, under the same stress conditions, the performance parameters (deformation and yielding of the bottom support) of the "figure-eight downward compression" stress mode are compared, as shown in the table below:

[0126] Table 1: Comparison of Figure-Eight Compression Results for Each Scheme (Deformation and Yielding of the Bottom Support)

[0127]

[0128] In the "figure-eight downward pressure" working condition (Table 1), the bottom support 10 of this application, under the same stress conditions, has significantly better resistance to deformation and yielding than Scheme 1 to Scheme 4.

[0129] Specifically, when the load is 8 kgf, the deformation of the bottom support 10 of Schemes 1 to 4 is 6° to 7°, while the deformation of the embodiment of this application (Scheme 5) is only 3°, which is less than half of that of Schemes 1 to 4. This means that in daily use, Schemes 1 to 4 are more likely to experience problems such as host displacement and appearance deformation due to slight downward pressure.

[0130] When the load increases to 10 kgf, all three schemes (1 to 4) show slight yielding, while scheme 5 shows no yielding. This indicates that the yield threshold of the embodiments of this application is higher and can withstand greater instantaneous pressure.

[0131] When the load reaches 12 kgf, schemes 1 to 4 enter a clear yielding state, and irreversible deformation is very likely to occur subsequently, while scheme 5 only yields slightly, and the structural integrity is still guaranteed.

[0132] When the load increases to 15 kgf, the bottom support 10 of schemes 1 to 4 will break directly and lose its function completely, while the bottom support 10 of this application will only "have a certain yield" and can still maintain the foundation support capacity.

[0133] It is evident that this difference directly reflects that when dealing with scenarios such as excessive pressure and accidental impacts, the resistance to damage of Schemes 1 to 4 is far inferior to that of the bottom bracket 10 of this application, which may easily lead to the wearable device 100 being returned for repair.

[0134] Furthermore, under the same stress conditions, the performance parameters (bottom support stiffness and fracture force) of the "three-point bend" under the stress mode are compared, as shown in Table 2 below:

[0135] Table 2: Comparison of Three-Point Bending Results for Each Scheme (Bottom Support Stiffness and Fracture Strength)

[0136]

[0137]

[0138] In the "three-point bend" condition (Table 2), both Schemes 1 to 4 have shortcomings in stiffness and fracture resistance. Specifically, regarding the stiffness of the bottom support 10, the stiffness values ​​of Schemes 1 to 4 are only 5.08Kgf / mm-5.47Kgf / mm, while the embodiment of this application has a stiffness of 10.02Kgf / mm, which is 1.8-1.97 times that of Schemes 1 to 4. The higher stiffness means that the embodiment of this application can more effectively resist bending deformation during daily wear (such as the three-point bend caused by wrist bending), and avoid creep caused by long-term stress on the bottom support 10.

[0139] Regarding the breaking force, the breaking force of Schemes 1 to 4 is only 24.0 kgf-25.1 kgf, while the embodiment of this application reaches 45.5 kgf, which is close to 1.8-1.9 times that of Schemes 1 to 4. This indicates that the embodiment of this application can withstand greater bending external forces (such as excessive wearing or impact when the wearable device 100 is dropped), thereby helping to reduce the risk of breakage and extend the service life of the wearable device 100.

[0140] Therefore, compared to optimizing the metal plate 12 along the thickness direction of the plastic substrate 11 and increasing the overall thickness of the metal plate 12, the solution proposed in this application uses less material and is lighter, thus achieving a thinner and lighter design for the bottom support 10. It is evident that the wearable device 100 using the bottom support 10 of this application can solve the problem that while pursuing a thinner and lighter design, the bottom support 10 is also prone to bending and deformation due to external forces, and is easily damaged, effectively improving the structural reliability and durability of the bottom support 10.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A bottom support, characterized in that, The bottom support is used in a wearable device, the wearable device including a smart host, and the bottom support includes: A plastic substrate having a first surface along its thickness direction, the first surface being configured to support the smart host, and the plastic substrate having a hollowed-out center to form a ring-shaped structure; A metal plate, the metal plate being embedded in the plastic substrate and surrounding the hollow portion of the plastic substrate, the metal plate comprising: Main body panel; The thickened portion is disposed on one side of the main body plate along the thickness direction of the plastic substrate and protrudes in the direction toward the first surface.

2. The bottom bracket according to claim 1, characterized in that, The first surface has a first opening, and the thickened portion at least partially fills the first opening; The thickened portion has an upper surface that is away from the main body plate portion, the upper surface being exposed to the first opening and flush with the first surface.

3. The bottom bracket according to claim 2, characterized in that, The plastic substrate has an inner ring side and an outer ring side, and the first opening is an annular opening surrounding the hollow part of the plastic substrate, and the first opening is located near the inner ring side.

4. The bottom bracket according to claim 3, characterized in that, The plastic matrix further includes a second surface along the thickness direction. The second surface includes a first plane and a first inclined surface. The first inclined surface is connected to the first plane and is inclined in the direction from the inner ring side to the outer ring side, so that the thickness of the plastic matrix on the outer ring side is less than the thickness on the inner ring side. The main body plate has a second inclined surface on the side away from the thickened portion. The second inclined surface is disposed corresponding to the first inclined surface, and the second inclined surface extends to the portion of the main body plate near the outer ring side, so that the thickness of the main body plate in the portion corresponding to the inner ring side is greater than the thickness of the main body plate in the portion corresponding to the outer ring side.

5. The bottom bracket according to claim 3, characterized in that, The main body plate includes a first plate, a second plate, and a third plate connected in sequence. The first plate extends in a direction close to the inner ring side. The thickened portion is disposed on the second plate. The third plate extends in a direction close to the outer ring side. In the direction from the inner ring side to the outer ring side, the extension dimension of the first plate is smaller than the extension dimension of the third plate, so that the thickened portion is disposed close to the inner ring side.

6. The bottom support according to any one of claims 1-5, characterized in that, The metal plate also includes reinforcing columns, which are disposed on the side of the main plate away from the thickened portion, and are disposed near the hollow portion of the plastic substrate.

7. The bottom bracket according to claim 6, characterized in that, The projection of the reinforcing column onto the surface of the main body plate is at least partially located within the area of ​​the thickened portion on the surface of the main body plate.

8. The bottom support according to any one of claims 1-5, characterized in that, Along the thickness direction of the plastic substrate, the sum of the thicknesses of the main body plate and the thickened portion is T1, and the thickness of the plastic substrate is T2, satisfying: 0.5 ≤ T1 / T2 ≤ 1; and / or, The total width of the plastic matrix is ​​H1, and the width from the inner ring side to the outer ring side of the plastic matrix is ​​H2, satisfying: 0.1 ≤ H2 / H1 ≤ 0.3; and / or, The width of the thickened portion is H3, and the width of the main plate portion is H4, satisfying: 0.2≤H3 / H4≤0.

8.

9. The bottom bracket according to claim 8, characterized in that, The sum of the thicknesses of the main body plate and the thickened portion, T1, satisfies: 1.4mm ≤ T1 ≤ 2.3mm; the thickness T2 of the plastic substrate satisfies: 1.95mm ≤ T2 ≤ 2.65mm; and / or, The total width H1 of the plastic substrate satisfies: 27.5mm ≤ H1 ≤ 36.5mm, and the width H2 from the inner ring side to the outer ring side of the plastic substrate satisfies: 3.2mm ≤ H2 ≤ 8.5mm; and / or, The width H3 of the thickened portion satisfies: 0.3mm≤H3≤0.9mm, and the width H4 of the main plate portion satisfies: 0.8mm≤H4≤1.6mm.

10. A wearable device, characterized in that, It includes a smart host, a wearable component, and a base bracket as described in any one of claims 1-9, wherein the smart host is rotatably connected to the base bracket, and the wearable component is connected to the base bracket.

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