Middle frame blank, wearable equipment and injection mold

Abstract

The utility model relates to the technical field of wearable equipment, in particular to a middle frame blank, wearable equipment and an injection mold. The middle frame blank is applied to the wearable device and comprises a supporting plate; the metal frame body is arranged in the edge area of the supporting plate, and the supporting plate and the metal frame body are integrally formed; reinforcing ribs are arranged on the peripheral face of the metal frame body and arranged at the end, away from the supporting plate, of the metal frame body in the thickness direction of the supporting plate. Due to the fact that the reinforcing ribs are arranged at the end, deviating from the supporting plate, of the metal frame body, the end, deviating from the supporting plate, of the metal frame body can well resist the inward acting force, and the inward deformation degree of the end, deviating from the supporting plate, of the metal frame body under the action of the acting force can be reduced; and the shrinkage amount of the end, deviating from the supporting plate, of the plastic frame in the cooling process is reduced, and installation of components in the wearable equipment is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wearable devices, and in particular to a middle frame blank, a wearable device, and an injection mold. BACKGROUND

[0002] The middle frame of a watch is a core component of the watch structure, which can provide stable support for various components of the watch.

[0003] The middle frame of the current watch is made of a middle frame blank, which includes a metal frame body and a plastic frame body. The plastic frame body is formed in the metal frame body by a nano injection molding process. However, the plastic frame body formed by nano injection molding has a large shrinkage during the cooling process, which is not conducive to the installation of various components in the watch. CONTENT OF THE UTILITY MODEL

[0004] The present application discloses a middle frame blank, a wearable device, and an injection mold, which can reduce the shrinkage of the plastic frame body during the cooling process.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present application discloses a middle frame blank applied to a wearable device, comprising:

[0006] a support plate;

[0007] a metal frame body, which is arranged at the edge region of the support plate, and the support plate and the metal frame body are integrally formed;

[0008] The outer peripheral surface of the metal frame body is provided with a reinforcing rib, which is arranged at one end of the metal frame body away from the support plate in the thickness direction of the support plate.

[0009] In an optional embodiment, the metal frame body is provided with a first through hole, which penetrates the metal frame body in the thickness direction of the metal frame body, and the reinforcing rib is arranged on the side of the first through hole away from the support plate.

[0010] In an optional embodiment, the metal frame body includes a first side wall and a second side wall, which are respectively arranged at opposite sides of the support plate, and the first side wall and the second side wall are arranged apart from each other. At least one of the first side wall and the second side wall is provided with the reinforcing rib.

[0011] In an optional embodiment, the middle frame blank further includes a plastic frame body in the form of a ring, which is injection molded in the metal frame body in the circumferential direction;

[0012] The outer peripheral surface of the first sidewall is provided with the reinforcing rib. Along the length direction of the first sidewall, the reinforcing rib extends from one end of the first sidewall to the other end, and the protrusion height of the middle region of the reinforcing rib is greater than the protrusion height of the two ends of the reinforcing rib.

[0013] In one alternative embodiment, the support plate is provided with a second through hole, which is used to reduce the rigidity of the support plate.

[0014] In one optional embodiment, the support plate is provided with a second through hole in the edge region near the first sidewall, and the support plate is also provided with an antenna mold avoidance hole that is spaced apart from the second through hole.

[0015] In one optional embodiment, along the arrangement direction of the first sidewall and the second sidewall, the minimum distance between the first hole wall of the second through hole near the first sidewall and the first sidewall is less than 2 mm.

[0016] In one optional embodiment, the width of the second through hole is 2 to 5 mm along the arrangement direction of the first sidewall and the second sidewall.

[0017] In one optional embodiment, the second through hole has a first hole wall disposed near the first sidewall and a second hole wall disposed away from the first sidewall, wherein the length of the first hole wall is greater than the length of the second hole wall along the length direction of the first sidewall.

[0018] In an optional embodiment, the support plate is further provided with an antenna mold clearance hole, the second through hole is disposed near the antenna mold clearance hole, the direction from the second through hole to the antenna mold clearance hole is such that one end of the first hole wall near the antenna mold clearance hole extends beyond one end of the second hole wall near the antenna mold clearance hole.

[0019] In one optional embodiment, the mid-frame blank further includes a plastic frame body, which is injection molded circumferentially within the metal frame body;

[0020] The inner wall of the metal frame is provided with a notch, which extends into the interior of the reinforcing rib and is separated from the outer peripheral surface of the reinforcing rib. A portion of the plastic frame is embedded in the notch.

[0021] In one optional embodiment, the mid-frame blank further includes an annular plastic frame body, which is circumferentially injection molded into the metal frame body. The plastic frame body contains glass fiber, and the weight of the glass fiber accounts for 40% to 50% of the total weight of the plastic frame body.

[0022] Secondly, embodiments of this application disclose a wearable device, including:

[0023] The middle frame is formed by machining the middle frame blank as described in any of the above embodiments.

[0024] Thirdly, embodiments of this application disclose an injection mold for injection molding to form a mid-frame blank as described in any of the above embodiments. The mid-frame blank further includes an annular plastic frame body, which is injection molded circumferentially within the metal frame body. The injection mold includes:

[0025] A first mold is disposed within the metal frame to cooperate with the metal frame to form a first injection cavity. The first injection cavity is used to injection mold the plastic frame. The area enclosed by the outer contour of the first mold's cross-section parallel to the support plate is a first area. The first area is greater than a preset area of ​​the internal space of the plastic frame parallel to the cross-section of the support plate.

[0026] In one optional embodiment, the injection mold further includes a second mold having a second injection cavity for injection molding the metal frame. The area of ​​the inner wall surface of the second injection cavity parallel to the cross-section of the support plate is a second area, which is greater than a preset area of ​​the internal space of the metal frame parallel to the cross-section of the support plate.

[0027] Compared with related technologies, the beneficial effects of this application are:

[0028] In this application, a metal frame is disposed at the edge region of the support plate and integrally formed with the support plate. Along the thickness direction of the support plate, the outer peripheral surface of the end of the metal frame facing away from the support plate is provided with reinforcing ribs. This increases the rigidity of the end of the metal frame facing away from the support plate, reducing the risk of deformation when subjected to external forces. Therefore, when a plastic frame is injection molded within the metal frame, and the plastic frame applies an inward force to the metal frame during cooling, the reinforcing ribs at the end of the metal frame facing away from the support plate effectively resist this force. This reduces the degree of inward deformation of the end of the metal frame facing away from the support plate under this force, thereby reducing the shrinkage of the end of the plastic frame facing away from the support plate during cooling, which is beneficial for the installation of components within the wearable device. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the structure of the middle frame blank disclosed in the embodiments of this application;

[0031] Figure 2 This is an exploded view of the mid-frame blank disclosed in an embodiment of this application;

[0032] Figure 3 This is an isometric view of the metal frame disclosed in the embodiments of this application;

[0033] Figure 4 This is a top view of the metal frame disclosed in the embodiments of this application;

[0034] Figure 5 For this application Figure 4 Enlarged diagram of point A in the middle.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100. Support plate; 110. Second through hole; 111. First hole wall; 112. Second hole wall; 120. Antenna mold clearance hole;

[0037] 200. Metal frame; 201. First through hole; 202. Reinforcing rib; 203. Notch; 210. First sidewall; 220. Second sidewall;

[0038] 300. Plastic frame. Detailed Implementation

[0039] 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.

[0040] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" 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.

[0041] 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.

[0042] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" 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.

[0043] 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.

[0044] The current watch frame is made from a frame blank, which includes a support plate, a metal frame, and a plastic frame. The plastic frame is formed inside the metal frame using a nano-injection molding process. The metal frame is located on the support plate and is integrally formed with it. The end of the metal frame away from the support plate has an opening, so the end of the metal frame away from the support plate is more prone to deformation than the side of the metal frame closer to the support plate.

[0045] During the cooling process of the plastic frame, the plastic frame tends to shrink inward and exerts an inward force on the metal frame. This force is relatively large, so the end of the metal frame away from the support plate is easily deformed inward under the action of this force. As a result, the end of the plastic frame away from the support plate has a large amount of shrinkage during the cooling process, which is not conducive to the installation of various components.

[0046] This application discloses a mid-frame blank, a wearable device, and an injection mold, which can improve the structural strength of the end of the metal frame away from the support plate to resist the tendency of the plastic frame to shrink and deform inward during cooling, thereby reducing the shrinkage of the plastic frame.

[0047] The following description, in conjunction with the accompanying drawings, details the mid-frame blank, wearable device, and injection mold provided in this application through specific embodiments and application scenarios.

[0048] like Figure 3As shown in the illustration, this application discloses a mid-frame blank for use in wearable devices, such as smartwatches and smart bracelets. The mid-frame blank includes a support plate 100 and a metal frame 200. The metal frame 200 is disposed on the edge region of the support plate 100, and the support plate 100 and the metal frame 200 are integrally formed. For example, the support plate 100 and the metal frame 200 can be integrally formed by forging or by metal powder injection molding.

[0049] The outer peripheral surface of the metal frame 200 is provided with a reinforcing rib 202, which is located at one end of the metal frame 200 facing away from the support plate 100 along the thickness direction of the support plate 100. For example, along the thickness direction of the support plate 100, the surface of the reinforcing rib 202 facing away from the support plate 100 is flush with the surface of the metal frame 200 facing away from the support plate 100.

[0050] It should be noted that a first internal space is formed within the metal frame 200, at least a portion of the plastic frame 300 is located within the first internal space, and the outer peripheral surface of the metal frame 200 is the surface of the metal frame 200 that faces away from the first internal space. The internal space formed within the plastic frame 300 is a second internal space, which is used to install components such as circuit boards, batteries, and sensors of the wearable device.

[0051] In this application, the metal frame 200 is disposed in the edge region of the support plate 100 and is integrally formed with the support plate 100. Along the thickness direction of the support plate 100, the outer peripheral surface of the end of the metal frame 200 away from the support plate 100 is provided with reinforcing ribs 202. This can increase the rigidity of the end of the metal frame 200 away from the support plate 100 and reduce the risk of deformation of the end of the metal frame 200 away from the support plate 100 when subjected to external force. Therefore, when a plastic frame 300 is injection molded inside a metal frame 200, and the plastic frame 300 applies an inward force to the metal frame 200 during cooling, the reinforcing rib 202 provided at the end of the metal frame 200 away from the support plate 100 can effectively resist the force. This reduces the degree of inward deformation of the end of the metal frame 200 away from the support plate 100 under the force, thereby reducing the shrinkage of the end of the plastic frame 300 away from the support plate 100 during cooling, which is beneficial for the installation of components inside the wearable device.

[0052] Because metals can provide electromagnetic shielding for antennas, in one alternative embodiment, please refer to... Figure 3The metal frame 200 is provided with a first through hole 201, which extends through the metal frame 200 along its thickness direction. A reinforcing rib 202 is provided corresponding to the first through hole 201 and located on the side of the first through hole 201 away from the support plate 100. It should be noted that "the reinforcing rib 202 corresponding to the first through hole 201" means that the area of ​​the metal frame 200 where the first through hole 201 is provided is positioned opposite the area of ​​the metal frame 200 where the reinforcing rib 202 is provided along the thickness direction of the support plate 100.

[0053] In this embodiment, a first through hole 201 is provided on the metal frame 200. The first through hole 201 can serve as a window for antenna signals to radiate out, providing a better signal transmission path for the antenna and improving antenna performance. In addition, since the reinforcing rib 202 is provided corresponding to the first through hole 201, even though providing the first through hole 201 on the metal frame 200 will reduce the strength of the metal frame 200, the design of the reinforcing rib 202 can still ensure that the metal frame 200 has a certain strength, reducing the amount of shrinkage of the end of the plastic frame 300 away from the support plate 100 during the cooling process.

[0054] In one alternative embodiment, please refer to Figure 3 The metal frame 200 includes a first sidewall 210 and a second sidewall 220. The first sidewall 210 and the second sidewall 220 are respectively disposed on opposite sides of the support plate 100. The first sidewall 210 and the second sidewall 220 are spaced apart. At least one of the first sidewall 210 and the second sidewall 220 is provided with a reinforcing rib 202.

[0055] In this embodiment, the metal frame 200 includes a first sidewall 210 and a second sidewall 220 disposed opposite to each other. The first sidewall 210 and the second sidewall 220 are spaced apart, so that an opening can be formed between the first end of the first sidewall 210 and the first end of the second sidewall 220, and an opening can also be formed between the second end of the first sidewall 210 and the second end of the second sidewall 220. Both of these openings can serve as windows for antenna signals to radiate out, providing a better signal transmission path for the antenna and improving antenna performance. Of course, the metal frame 200 can also be an annular frame, and this application does not limit it to this.

[0056] In one alternative embodiment, please refer to Figures 1 to 3 The mid-frame blank also includes a ring-shaped plastic frame 300, which is injection molded circumferentially within the metal frame 200. In other words, the plastic frame is injection molded circumferentially within the metal frame 200 along the support plate 100. The plastic frame 300 is made of plastic material, such as polyphenylene sulfide. Plastic materials have good sealing properties, thus the plastic frame 300 can achieve good waterproof and dustproof effects, preventing moisture and dust from entering the plastic frame 300.

[0057] A reinforcing rib 202 is provided on the outer peripheral surface of the first sidewall 210. Along the length of the first sidewall 210, the reinforcing rib 202 extends from one end of the first sidewall 210 to the other end, and the protrusion height of the middle region of the reinforcing rib 202 is greater than the protrusion height of the two ends of the reinforcing rib 202. It should be noted that the protrusion height of the reinforcing rib 202 refers to the height by which the reinforcing rib 202 protrudes from the outer peripheral surface of the metal frame 200.

[0058] Please see Figure 1 Since the plastic frame 300 is annular, it has a first portion supported between the first end of the first sidewall 210 and the first end of the second sidewall 220. That is, one end of the first portion of the plastic frame 300 abuts against the first end of the first sidewall 210, and the other end of the first portion of the plastic frame 300 abuts against the first end of the second sidewall 220. The plastic frame 300 also has a second portion supported between the second end of the first sidewall 210 and the second end of the second sidewall 220.

[0059] Since the first and second parts of the plastic frame 300 can support the two ends of the first sidewall 210 respectively, while the middle frame of the first sidewall 210 is not supported by the plastic frame 300, the two ends of the first sidewall 210 are less likely to deform under external force than the middle part of the first sidewall 210. Therefore, even if the protrusion height of the two ends of the reinforcing rib 202 is less than the protrusion height of the middle region of the reinforcing rib 202 in this embodiment, the degree of deformation of the two ends of the first sidewall 210 when the plastic frame 300 shrinks is not significant.

[0060] Furthermore, the protrusion height at both ends of the reinforcing rib 202 is less than the protrusion height in the middle region of the reinforcing rib 202. This saves material used in molding the reinforcing rib 202, thereby reducing the manufacturing cost of the metal frame 200. Moreover, the protrusion height in the middle region of the reinforcing rib 202 is greater than that at both ends, which better matches the characteristic of the first sidewall 210 being easily deformable in the middle and less deformable at both ends. This makes the deformation degree of each part of the first sidewall 210 containing the reinforcing rib 202 tend to be consistent along its length, thus facilitating the enlarged design of the first mold described below.

[0061] In some embodiments, the protrusion height of the reinforcing rib 202 gradually increases from both ends toward the middle, which prevents stress concentration caused by abrupt changes in the protrusion height of the reinforcing rib 202. Furthermore, along the length direction of the first sidewall 210, the protrusion height of the middle region of the reinforcing rib 202 remains constant, thus enabling the reinforcing rib 202 to have a better reinforcing effect on the middle part of the first sidewall 210.

[0062] In one alternative embodiment, please refer toFigure 3 and Figure 4 The support plate 100 is provided with a second through hole 110, which extends from one surface of the support plate 100 to the other surface. The second through hole 110 is used to reduce the rigidity of the support plate 100.

[0063] In this embodiment, the support plate 100 is provided with a second through hole 110. The second through hole 110 can reduce the stiffness of the support plate 100, thereby reducing the support stiffness of the support plate 100 on the end of the first sidewall 210 near the support plate 100. This can make the deformation degree of the two ends of the first sidewall 210 along the thickness direction of the support plate 100 tend to be consistent when subjected to external force, thereby facilitating the enlarged design of the first mold described below.

[0064] In one alternative embodiment, please refer to Figure 4 The support plate 100 has a second through hole 110 near the edge of the first sidewall 210, and the support plate 100 also has an antenna mold clearance hole 120 that is spaced apart from the second through hole 110. For example, when the metal frame 200 is formed by metal powder injection molding, an antenna mold needs to be inserted in order to form the antenna structure. After the metal frame 200 is injection molded, the antenna mold needs to be pulled out. The antenna mold clearance hole 120 is the hole formed when the antenna mold is pulled out.

[0065] In this embodiment, the second through hole 110 is provided in the edge region of the support plate 100 near the first side wall 210. This can further reduce the stiffness of the support plate 100, thereby further reducing the support stiffness of the support plate 100 on the end of the first side wall 210 near the support plate 100. This makes the deformation of the two ends of the first side wall 210 along the thickness direction of the support plate 100 more consistent when subjected to external force, which is more conducive to the enlarged design of the first mold described below.

[0066] In one alternative embodiment, please refer to Figure 5 Along the arrangement direction of the first sidewall 210 and the second sidewall 220, the second through hole 110 is close to the minimum distance between the first hole wall 111 and the first sidewall 210 (by...). Figure 5 The dimension L shown in the figure is less than 2 mm. For example, L can be equal to 0.3 mm, 0.6 mm, 0.8 mm, 1.2 mm, 1.5 mm, 1.7 mm, 1.9 mm, etc., and this application does not limit the specific value of L.

[0067] If L is greater than 2mm, the second through hole 110 is too far away from the first side wall 210. The width of the solid part of the support plate 100 located between the second through hole 110 and the first side wall 210 is large. Therefore, the second through hole 110 reduces the support stiffness of the support plate 100 on the end of the first side wall 210 near the support plate 100 to a limited extent. Correspondingly, the degree to which the deformation of the two ends of the first side wall 210 along the thickness direction of the support plate 100 tends to be consistent when subjected to external force is also limited.

[0068] Therefore, in this embodiment, L is less than 2mm, the second through hole 110 is closer to the first side wall 210, and the width of the solid portion of the support plate 100 between the second through hole 110 and the first side wall 210 is within a suitable range. This makes the deformation of the two ends of the first side wall 210 along the thickness direction of the support plate 100 more consistent when subjected to external force, which is more conducive to the enlarged design of the first mold described below.

[0069] In one alternative embodiment, please refer to Figure 5 Along the arrangement direction of the first sidewall 210 and the second sidewall 220, the width of the second through hole 110 (by...) Figure 5 The dimension d shown in the figure is 2 to 5 mm. For example, d can be 2.2 mm, 2.5 mm, 2.6 mm, 2.8 mm, 3.1 mm, 3.4 mm, 3.8 mm, 4.3 mm, 4.5 mm, 4.8 mm, etc.

[0070] If the width of the second through hole 110 is less than 2 mm, the reduction in stiffness of the support plate 100 is limited, and the reduction in the supporting stiffness of the support plate 100 on the end of the first side wall 210 near the support plate 100 is also limited. Correspondingly, the degree to which the deformation of the two ends of the first side wall 210 along the thickness direction of the support plate 100 tends to be consistent under external force is also limited. If the width of the second through hole 110 is greater than 5 mm, the reduction in stiffness of the support plate 100 is too large, which may cause the end of the first side wall 210 near the support plate 100 to deform more easily than the end with the reinforcing rib 202.

[0071] Therefore, in this embodiment, the width of the second through hole 110 is controlled to be 2 to 5 mm, which can keep the reduction in stiffness of the support plate 100 within a suitable range and ensure that the deformation of the two ends of the first side wall 210 along the thickness direction of the support plate 100 tends to be consistent when subjected to external force.

[0072] In one alternative embodiment, please refer to Figure 4 and Figure 5The second through hole 110 has a first hole wall 111 disposed near the first side wall 210 and a second hole wall 112 disposed away from the first side wall 210. Along the length direction of the first side wall 210, the length of the first hole wall 111 is greater than the length of the second hole wall 112.

[0073] In this embodiment, the first hole wall 111 of the second through hole 110 near the first sidewall 210 is longer than the second hole wall 112 of the second through hole 110 away from the first sidewall 210. This allows more of the solid portion of the support plate 100 near the first hole wall 111 to be removed, thereby more effectively reducing the support stiffness of the support plate 100 on the end of the first sidewall 210 near the support plate 100. This satisfies the requirement for inward deformation of the end of the first sidewall 210 near the support plate 100, ensuring that the deformation degree of the two ends of the first sidewall 210 along the thickness direction of the support plate 100 tends to be consistent when subjected to external force. Furthermore, the length of the second hole wall 112 is smaller, meaning that less of the solid portion of the support plate 100 is removed on the side near the second hole wall 112. This allows for a larger plate surface on the support plate 100, facilitating the installation of other structures on the support plate 100, such as the antenna mold clearance hole 120 or the injection point when injecting the metal frame 200.

[0074] As can be seen, this embodiment can satisfy the requirement of inward deformation of the end of the first sidewall 210 near the support plate 100 while reserving a larger plate surface for the support plate 100, which is beneficial for the layout of other structures on the support plate 100. Of course, the length of the first hole wall 111 can also be less than or equal to the length of the second hole wall 112, and this application does not limit this.

[0075] In an optional embodiment, the support plate 100 is further provided with an antenna mold clearance hole 120, and a second through hole 110 is provided near the antenna mold clearance hole 120. The direction from the second through hole 110 to the antenna mold clearance hole 120 is such that one end of the first hole wall 111 near the antenna mold clearance hole 120 extends beyond the other end of the second hole wall 112 near the antenna mold clearance hole 120.

[0076] In this embodiment, the end of the first hole wall 111 that is near the antenna mold clearance hole 120 extends beyond the end of the second hole wall 112 that is near the antenna mold clearance hole 120. In other words, the second hole wall 112 is relatively far away from the antenna mold clearance hole 120, which can provide more layout space for the antenna mold clearance hole 120 and facilitate the layout of the antenna mold hole.

[0077] In one alternative embodiment, please refer to Figure 1 and Figure 3The mid-frame blank also includes a plastic frame 300, which is injection molded circumferentially within the metal frame 200. The inner wall of the metal frame 200 is provided with a notch 203, which extends into the interior of the reinforcing rib 202 and is separated from the outer peripheral surface of the reinforcing rib 202. A portion of the plastic frame 300 is embedded in the notch 203.

[0078] In this embodiment, the inner wall of the metal frame 200 is provided with a notch 203, and a portion of the plastic frame 300 is embedded in the notch 203. This increases the contact area between the plastic frame 300 and the metal frame 200, enhances the bonding force between them, makes the connection more stable, and prevents the plastic frame 300 from detaching from the metal frame 200 when shrinking. Furthermore, in this embodiment, the notch 203 extends into the interior of the reinforcing rib 202. Therefore, providing the notch 203 does not significantly reduce the structural strength of the metal frame 200. The end of the metal frame 200 away from the support plate 100 still has considerable structural strength and can still effectively resist the force exerted by the plastic frame 300 when shrinking. Moreover, the notch 203 extends into the interior of the reinforcing rib 202, which increases the extension length of the notch 203, thereby further increasing the contact area between the plastic frame 300 and the metal frame 200 and enhancing the bonding force between them.

[0079] In one optional embodiment, the mid-frame blank further includes an annular plastic frame 300, which is circumferentially injection molded within the metal frame 200. The plastic frame 300 contains glass fiber, and the weight of the glass fiber accounts for 40% to 50% of the total weight of the plastic frame 300. For example, the weight of the glass fiber may account for 42%, 45%, 46%, 48%, 49%, etc., of the total weight of the plastic frame 300.

[0080] Specifically, the higher the glass fiber content, the greater the structural strength of the plastic frame 300; the lower the glass fiber content, the better the sealing performance of the plastic frame 300.

[0081] If the weight of fiberglass accounts for less than 40% of the total weight of the plastic frame 300, the structural strength of the plastic frame 300 will be relatively low, and the plastic frame 300 will be more prone to shrinkage and deformation. This will reduce the ability of the reinforcing rib 202 to resist the inward shrinkage and deformation of the plastic frame 300. If the weight of fiberglass accounts for more than 50% of the total weight of the plastic frame 300, the waterproof performance of the plastic frame 300 will become too weak, which is not conducive to the protection of the components inside the plastic frame 300. Therefore, in this embodiment, the weight of fiberglass accounts for 40% to 50% of the total weight of the plastic frame 300. This not only gives the plastic frame 300 greater structural strength and enhances the ability of the reinforcing rib 202 to resist the inward shrinkage and deformation of the plastic frame 300, but also gives the plastic frame 300 excellent waterproof performance.

[0082] This application also discloses a wearable device, including:

[0083] The middle frame is formed by machining the middle frame blank as described in any of the above embodiments.

[0084] This application also discloses an injection mold for injection molding the middle frame blank as described in any of the above embodiments. The middle frame blank further includes an annular plastic frame 300, which is circumferentially injection molded within the metal frame 200. The injection mold includes:

[0085] The first mold is set inside the metal frame 200 to cooperate with the metal frame 200 to form a first injection cavity. The first injection cavity is used to injection mold a plastic frame 300. The area enclosed by the outer contour of the first mold's cross-section parallel to the support plate 100 is a first area. The first area is larger than a preset area of ​​the internal space of the plastic frame 300 parallel to the cross-section of the support plate 100, that is, the first area is larger than a preset area of ​​the inner wall of the plastic frame 300 parallel to the cross-section of the support plate 100. It should be noted that the preset area of ​​the internal space of the plastic frame 300 parallel to the cross-section of the support plate 100 can be the designed area of ​​the internal space of the plastic frame 300 parallel to the cross-section of the support plate 100 during the design stage.

[0086] In this embodiment, the area enclosed by the outer contour of the first mold's cross-section parallel to the support plate 100 is the first area. The first area is larger than the preset area of ​​the internal space of the plastic frame 300 parallel to the support plate 100. During injection molding, the inner wall of the plastic frame 300 will fit against the outer peripheral surface of the first mold. Therefore, through the above-mentioned size design, the area of ​​the internal space of the plastic frame 300 parallel to the support plate 100 during injection molding can be increased. In this way, after the plastic frame 300 cools and shrinks inward, the area of ​​the internal space of the plastic frame 300 parallel to the support plate 100 during injection molding can be made equal to the preset area, thereby improving the assembly accuracy of the various components of the wearable device.

[0087] In one optional embodiment, the injection mold further includes a second mold having a second injection cavity for injection molding the metal frame 200. The area of ​​the cross-section of the inner wall of the second injection cavity parallel to the support plate 100 is a second area, which is larger than a preset area of ​​the internal space of the metal frame 200 parallel to the cross-section of the support plate 100. It should be noted that the preset area of ​​the internal space of the metal frame 200 parallel to the cross-section of the support plate 100 can be the designed area of ​​the internal space of the metal frame 200 parallel to the cross-section of the support plate 100 during the design phase.

[0088] In this embodiment, the area of ​​the cross-section of the inner wall surface of the second injection cavity parallel to the support plate 100 is the second area. The second area is larger than the preset area of ​​the cross-section of the internal space of the metal frame 200 parallel to the support plate 100. Therefore, the area of ​​the cross-section of the inner peripheral surface of the injection-molded metal frame 200 parallel to the support plate 100 is larger than the preset area. During the injection molding process of the plastic frame 300, the outer peripheral surface of the plastic frame 300 will fit against the inner peripheral surface of the metal frame 200. Therefore, by setting the area of ​​the cross-section of the inner peripheral surface of the metal frame 200 parallel to the support plate 100 to be larger, the wall thickness of the plastic frame 300 can be consistent with the design dimensions.

[0089] Furthermore, as the plastic frame 300 shrinks inward during the cooling process, it causes the metal frame 200 to deform inward. This will restore the larger metal frame 200 to the preset area. That is, after the plastic frame 300 has cooled down, the internal space of the metal frame 200 will be equal to the preset area of ​​the cross-section of the support plate 100.

[0090] The foregoing embodiments of this application focus on describing the differences between various embodiments. As long as the different optimization features between embodiments are not contradictory, they can be combined to form better embodiments. For the sake of brevity, these differences will not be elaborated upon here. The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many modifications without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. A mid-frame blank for use in wearable devices, characterized in that, include: Support plate (100); A metal frame (200) is provided in the edge region of the support plate (100), and the support plate (100) and the metal frame (200) are integrally formed. The outer periphery of the metal frame (200) is provided with reinforcing ribs (202), which are located at one end of the metal frame (200) away from the support plate (100) along the thickness direction of the support plate (100).

2. The middle frame blank according to claim 1, characterized in that, The metal frame (200) is provided with a first through hole (201), the first through hole (201) penetrates the metal frame (200) along the thickness direction of the metal frame (200), and the reinforcing rib (202) is provided corresponding to the first through hole (201) and located on the side of the first through hole (201) away from the support plate (100).

3. The middle frame blank according to claim 1, characterized in that, The metal frame (200) includes a first sidewall (210) and a second sidewall (220), the first sidewall (210) and the second sidewall (220) are respectively disposed on opposite sides of the support plate (100), the first sidewall (210) and the second sidewall (220) are spaced apart, and at least one of the first sidewall (210) and the second sidewall (220) is provided with the reinforcing rib (202).

4. The middle frame blank according to claim 3, characterized in that, The mid-frame blank also includes a ring-shaped plastic frame (300), which is injection molded circumferentially within the metal frame (200); The outer peripheral surface of the first sidewall (210) is provided with the reinforcing rib (202). Along the length direction of the first sidewall (210), the reinforcing rib (202) extends from one end of the first sidewall (210) to the other end, and the protrusion height of the middle region of the reinforcing rib (202) is greater than the protrusion height of the two ends of the reinforcing rib (202).

5. The middle frame blank according to claim 3, characterized in that, The support plate (100) is provided with a second through hole (110), which is used to reduce the rigidity of the support plate (100).

6. The middle frame blank according to claim 5, characterized in that, The support plate (100) has a second through hole (110) near the edge of the first side wall (210), and the support plate (100) also has an antenna mold clearance hole (120) that is separated from the second through hole (110).

7. The middle frame blank according to claim 5, characterized in that, Along the arrangement direction of the first sidewall (210) and the second sidewall (220), the minimum distance between the first hole wall (111) of the second through hole (110) near the first sidewall (210) and the first sidewall (210) is less than 2 mm.

8. The middle frame blank according to claim 5, characterized in that, Along the arrangement direction of the first sidewall (210) and the second sidewall (220), the width of the second through hole (110) is 2~5mm.

9. The middle frame blank according to claim 5, characterized in that, The second through hole (110) has a first hole wall (111) disposed near the first side wall (210) and a second hole wall (112) disposed away from the first side wall (210). Along the length direction of the first side wall (210), the length of the first hole wall (111) is greater than the length of the second hole wall (112).

10. The middle frame blank according to claim 9, characterized in that, The support plate (100) is also provided with an antenna mold clearance hole (120). The second through hole (110) is located near the antenna mold clearance hole (120). The direction from the second through hole (110) to the antenna mold clearance hole (120) is such that one end of the first hole wall (111) near the antenna mold clearance hole (120) extends beyond one end of the second hole wall (112) near the antenna mold clearance hole (120).

11. The middle frame blank according to claim 1, characterized in that, The mid-frame blank also includes a plastic frame (300), which is injection molded circumferentially within the metal frame (200); The inner wall of the metal frame (200) is provided with a notch (203), the notch (203) extends into the interior of the reinforcing rib (202), and the notch (203) is separated from the outer peripheral surface of the reinforcing rib (202). A part of the plastic frame (300) is embedded in the notch (203).

12. A wearable device, characterized in that, include: The middle frame is formed by machining the middle frame blank according to any one of claims 1 to 11.

13. An injection mold, characterized in that, For injection molding to form a mid-frame blank as described in any one of claims 1 to 11, the mid-frame blank further comprising an annular plastic frame (300), the plastic frame (300) being injection molded circumferentially within the metal frame (200), the injection mold comprising: A first mold is used to be disposed within the metal frame (200) to cooperate with the metal frame (200) to form a first injection cavity. The first injection cavity is used to injection mold the plastic frame (300). The area enclosed by the outer contour of the first mold parallel to the cross section of the support plate (100) is a first area. The first area is greater than a preset area of ​​the internal space of the plastic frame (300) parallel to the cross section of the support plate (100).

14. The injection mold according to claim 13, characterized in that, The injection mold further includes a second mold, which has a second injection cavity for injection molding to form the metal frame (200). The area of ​​the inner wall surface of the second injection cavity parallel to the cross section of the support plate (100) is a second area, which is greater than a preset area of ​​the internal space of the metal frame (200) parallel to the cross section of the support plate (100).

Images