Middle frame assembly and electronic equipment

Abstract

The invention provides a middle frame assembly and electronic equipment. The middle frame assembly comprises a middle frame, the outer side face of the middle frame is used for buckling a bottom cover of the electronic equipment, and an annular groove is formed in the outer side face of the middle frame; the waterproof sealing ring is arranged in the annular groove; the waterproof elastic body is arranged on the bottom surface of the middle frame, and the bottom surface of the middle frame is the surface, facing the bottom cover, of the middle frame. According to the technical scheme of the invention, the middle frame assembly can give consideration to the waterproof performance of the electronic equipment and the disassembly convenience of the bottom cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment, in particular to a middle frame assembly and an electronic equipment. BACKGROUND

[0002] The middle frame assembly of the electronic equipment, generally refers to a structural assembly inside the electronic product, which provides support, protection and fixation of internal parts for the electronic equipment. The waterproof performance of the middle frame assembly plays a crucial role in the electronic equipment, which is directly related to the durability, safety and reliability of the equipment. In today's fast-paced living environment, although the electronic equipment equipped with detachable bottom cover provides convenience for user maintenance, it often faces various risks of accidental falling, liquid splashing and humid water vapor. At this time, the structural design of the middle frame assembly is particularly critical.

[0003] Therefore, how to balance the waterproof performance of the electronic equipment and the convenience of detaching the bottom cover is an urgent technical problem to be solved. SUMMARY

[0004] The present application provides a middle frame assembly and an electronic equipment, which can balance the waterproof performance of the electronic equipment and the convenience of detaching the bottom cover.

[0005] In a first aspect, a middle frame assembly is provided, comprising: a middle frame, an outer side surface of the middle frame being used to be buckled with a bottom cover of an electronic equipment, and the outer side surface of the middle frame being provided with an annular groove; a waterproof sealing ring, the waterproof sealing ring being arranged in the annular groove; and a waterproof elastic body, the waterproof elastic body being arranged on a bottom surface of the middle frame, the bottom surface of the middle frame being a surface of the middle frame facing the bottom cover.

[0006] In the above technical solution, the waterproof sealing ring is arranged in the annular groove of the middle frame, which can effectively fill the structural gap when the bottom cover is assembled and buckled with the middle frame, forming a first sealing barrier. Further, the waterproof elastic body is arranged on the bottom surface of the middle frame, which builds a second sealing line after the bottom cover is pressed. Through the synergistic effect of the double sealing structure, it is conducive to blocking the penetration of liquid water along the assembly gap into the interior, improving the overall waterproof performance and meeting the IPX4 protection requirement. The annular groove can also provide stable positioning for the sealing ring, reducing displacement during disassembly; the waterproof elastic body can also control the disassembly resistance while effectively sealing, so that the structure balances the convenience of detaching the bottom cover on the basis of maintaining the waterproof ability.

[0007] In combination with the first aspect, in some implementation manners of the first aspect, the width of the annular groove is less than the width of the outer side surface of the middle frame, and the annular groove is arranged close to a top surface of the middle frame, the top surface of the middle frame being a surface of the middle frame away from the bottom cover.

[0008] In the technical solution, the annular groove can balance the structural strength and sealing performance of the middle frame assembly in limited space, thereby improving the anti-leakage capability of the edge area of the electronic device.

[0009] In combination with the first aspect, in some implementations of the first aspect, the middle frame assembly further includes an antenna, the antenna is arranged between the middle frame and the waterproof elastomer, and at least part of the antenna is wrapped around the outer side surface, the bottom surface and the inner side surface of the middle frame.

[0010] In the technical solution, the antenna and the external liquid environment can be further isolated, which not only improves the waterproof reliability of the antenna body area, but also enhances the overall waterproof performance of the middle frame assembly in the electronic device.

[0011] In combination with the first aspect, in some implementations of the first aspect, the middle frame assembly further includes a bracket, the middle frame is arranged at the periphery of the bracket, the bottom surface of the middle frame is coplanar with the bottom surface of the bracket, and the bottom surface of the bracket is a surface of the bracket facing the bottom cover.

[0012] In the technical solution, the bracket does not extend to the side area of the middle frame assembly, but is completely integrated in the interior of the middle frame, that is, the middle frame is arranged at the periphery of the bracket. This design can effectively reduce the assembly holes or joints in the side wall of the middle frame assembly, and fundamentally reduce the risk of liquid intrusion into the interior of the electronic device through the lateral interface. In addition, the coplanar arrangement of the bottom surface of the middle frame and the bottom surface of the bracket is beneficial to the subsequent assembly process of the bottom cover. Therefore, by arranging the middle frame at the periphery of the bracket, the overall waterproof reliability of the middle frame assembly can be improved.

[0013] In combination with the first aspect, in some implementations of the first aspect, the waterproof elastomer is further arranged on the bottom surface of the bracket.

[0014] In the technical solution, the support area of the sealing base can be effectively expanded in the limited space of the middle frame assembly, the load uniformity of the waterproof elastomer is improved, the sealing failure caused by local suspension or uneven stress is reduced, and the sealing stability and durability of the middle frame assembly under complex working conditions are enhanced.

[0015] In combination with the first aspect, in some implementations of the first aspect, the bottom surface of the bracket is provided with a first clamping structure, the first clamping structure is used for clamping the bottom cover, and the first clamping structure is arranged in the middle area of the bottom surface of the bracket.

[0016] In the technical solution, the first clamping structure is arranged in the middle area of the bottom surface of the bracket, which is beneficial to improving the stress uniformity and overall structural stability of the middle frame assembly 1.

[0017] In combination with the first aspect, in some implementations of the first aspect, the waterproof elastomer includes a frame-shaped elastomer matched with the bottom surface of the middle frame, and the width of the frame-shaped elastomer is greater than or equal to 0.8 mm.

[0018] In the technical solution, the width of the frame-shaped elastic body can make the waterproof elastic body maintain sufficient material volume after compression deformation, thereby continuously providing effective contact pressure at the sealing interface.

[0019] With reference to the first aspect, in some implementations of the first aspect, the thickness of the waterproof elastic body is greater than or equal to 0.45 mm and less than or equal to 0.65 mm.

[0020] In the technical solution, the bottom cover can be moderately elastically compressed when being pressed, which can form sufficient contact stress to achieve effective sealing and reduce permanent deformation or excessive disassembly resistance caused by excessive compression.

[0021] With reference to the first aspect, in some implementations of the first aspect, the depth of the annular groove is greater than the diameter of the waterproof sealing ring.

[0022] In the technical solution, by setting the depth of the annular groove and the diameter of the waterproof sealing ring, the waterproof reliability of the electronic device is improved, and the smoothness of disassembly of the bottom cover and the durability of the waterproof sealing ring are also promoted.

[0023] With reference to the first aspect, in some implementations of the first aspect, the depth of the annular groove is greater than or equal to 1.0 mm and less than or equal to 1.1 mm; and / or, the diameter of the waterproof sealing ring is greater than or equal to 0.95 mm and less than or equal to 1.0 mm.

[0024] In the technical solution, the depth range can make the waterproof sealing ring maintain stable elastic recovery force in long-term use, which is beneficial to both the waterproof performance and the convenience of disassembly of the bottom cover and the service life of the component; in addition, the diameter range of the waterproof sealing ring can make the waterproof sealing ring cooperate with the annular groove, so that the waterproof sealing ring can achieve a suitable compression rate after assembly.

[0025] With reference to the first aspect, in some implementations of the first aspect, in the case where the middle frame and the bottom cover are mutually buckled, the deformation amount of the waterproof sealing ring is greater than or equal to 0.05 mm and less than or equal to 0.1 mm.

[0026] In the technical solution, by controlling the deformation amount within the above range, the waterproof sealing ring can be made to produce sufficient compression deformation during assembly to establish effective sealing pressure, and the waterproof sealing ring can also be prevented from being plastically damaged due to excessive interference, thereby improving the reliability and durability of the waterproof sealing ring.

[0027] With reference to the first aspect, in some implementations of the first aspect, the material of the waterproof elastic body includes waterproof foam.

[0028] In the technical solution, the waterproof foam has excellent resilience and closed cell structure, and can fill the gap between structures by elastic deformation when the bottom cover is pressed, and quickly restore to the original state after the pressure is removed.

[0029] With reference to the first aspect, in some implementations of the first aspect, the material of the waterproof sealing ring comprises at least one of a thermoplastic elastomer and silica gel.

[0030] In the technical solution, the material of the waterproof sealing ring can be selected according to the specific requirements of the middle frame assembly.

[0031] The second aspect provides an electronic device, comprising a bottom cover and the middle frame assembly in the first aspect or each implementation of the first aspect, and the bottom cover is buckled to one side of the middle frame assembly.

[0032] With reference to the second aspect, in some implementations of the second aspect, the electronic device further comprises a screen assembly installed on the other side of the middle frame assembly. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is an exploded schematic view of a middle frame assembly provided by an embodiment of the present application.

[0034] Figure 2 is a structural schematic view of a middle frame provided by an embodiment of the present application.

[0035] Figure 3 is a structural schematic view of a middle frame assembly provided by an embodiment of the present application.

[0036] Figure 4 is Figure 3 is a partial enlarged schematic view of a middle B area.

[0037] Figure 5 is an exploded schematic view of another middle frame assembly provided by an embodiment of the present application.

[0038] Figure 6 is Figure 2 is a partial enlarged schematic view of a middle A area.

[0039] Figure 7 is a structural schematic view of another middle frame assembly provided by an embodiment of the present application.

[0040] Figure 8 is a planar structural schematic view of a middle frame assembly and a bottom cover provided by an embodiment of the present application.

[0041] Figure 9 is an exploded schematic view of an electronic device provided by an embodiment of the present application.

[0042] REFERENCE SIGNS: The middle frame assembly 1, the middle frame 11, the annular groove 111, the waterproof sealing ring 12, the waterproof elastic body 13, the antenna 14, the support 15, the first clamping structure 151, the guide groove 152, the bottom cover 2, the second clamping structure 21, and the screen assembly 3. DETAILED DESCRIPTION

[0043] The technical solutions in the present application will be described below with reference to the drawings.

[0044] In the description of the present application, it should be noted that the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features.

[0045] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", and "connecting" should be understood in a broad sense. For example, "connecting" can be detachable connection, or can be non-detachable connection; can be direct connection, or can be indirect connection through intermediate medium.

[0046] The orientation terms mentioned in the embodiments of the present application, such as "up", "down", "left", "right", "in", "out", and the like, are only the direction of the drawings. Therefore, the orientation terms are used to better and more clearly illustrate and understand the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, unless otherwise stated in the present application, "a plurality of" in the present application means two or more. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0047] In the description of the embodiments of the present application, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitations, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0048] In the embodiments of the present application, "and / or" is only used to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally represents an "or" relationship between the front and rear associated objects.

[0049] The present application relates to a middle frame of an electronic device. The electronic device can be a mobile terminal such as a mobile phone, a tablet computer, a tablet computer accessory, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a notebook computer, an ultra mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), or a professional shooting device such as a digital camera, a single-lens reflex camera / micro-single camera, a sports video camera, a gimbal camera, or a drone. The embodiments of the present application do not specially limit the specific form of the electronic device, and for the convenience of understanding, the electronic device is taken as a mobile phone in the following description.

[0050] In the electronic device, the middle frame assembly, as the core support structure, can form an external housing of the electronic device together with the bottom cover of the battery. The detachable bottom cover design can provide convenience for the user to open the bottom cover at any time and replace the battery or SIM card, and can improve the maintainability of the electronic device. However, since there is an assembly gap between the detachable bottom cover and the middle frame assembly, the joint is prone to become a channel for liquid to enter the internal device, resulting in poor waterproof performance of the electronic device.

[0051] Among them, the splash-proof waterproof level 4 (ingress protection rating 4, IPX4) is an international protection level for splash-proof water certification level. It requires that the device can withstand water flow splashing from any direction, and the nozzle is used to spray at multiple angles for 10 minutes at a flow rate of 10 liters per minute. The device that passes this certification can cope with scenarios such as rain splashing, sports sweat, and accidental liquid splashing in daily life. For electronic devices, the middle frame assembly, as the structural framework of the electronic device, its sealing performance directly determines the waterproof performance of the whole machine. Therefore, obtaining IPX4 certification means that the middle frame assembly can effectively resist daily liquid splashing, such as rain, sweat, and accidentally spilled drinks. This can improve the reliability of the electronic device in a variable environment and reduce problems such as main board short circuit, camera module failure, or battery abnormality caused by liquid intrusion.

[0052] ​In order to improve the waterproof performance of the electronic device, the prior art usually adopts a double-color injection molding waterproof ring or a screw press sealing scheme in the middle frame assembly. However, the double-color injection molding process is complex, and the mold cost is high; and the screw press sealing method causes inconvenience in disassembly, affecting the user experience. In addition, in order to achieve effective sealing and waterproof effect, the above method often needs to occupy a large structural space, affecting the thinness of the whole electronic device.

[0053] Reference Figure 1 , Figure 1 is an explosion schematic diagram of a middle frame assembly provided by an embodiment of the present application. In the embodiment of the present application, the middle frame assembly 1 of the electronic device can include a middle frame 11, a waterproof sealing ring 12, and a waterproof elastic body 13.

[0054] The outer side surface of the middle frame 11 is used to be buckled with the bottom cover of the electronic device, and the outer side surface of the middle frame 11 is provided with an annular groove 111; the waterproof sealing ring 12 is arranged in the annular groove 111; and the waterproof elastic body 13 is arranged on the bottom surface of the middle frame 11, which is the surface of the middle frame 11 facing the bottom cover.

[0055] Specifically, by arranging the waterproof sealing ring 12 in the annular groove 111 of the middle frame 11, the structural gap between the bottom cover of the electronic device and the middle frame assembly 1 can be effectively filled when they are assembled and buckled, forming a first reliable sealing barrier and improving the waterproof performance of the whole electronic device. Further, by arranging the waterproof elastic body 13 on the bottom surface of the middle frame 11, a second sealing line can be constructed at the contact interface after the bottom cover is buckled. Through the synergistic effect of this double sealing structure, liquid water can be effectively blocked from penetrating into the internal channel of the middle frame assembly 1 along the assembly gap, thereby improving the waterproof performance of the middle frame assembly and being conducive to achieving the waterproof level requirement of IPX4.

[0056] At the same time, the annular groove 111 can provide a stable positioning and accommodating space for the waterproof sealing ring 12, effectively reducing the displacement or falling of the waterproof sealing ring 12 during the disassembly of the bottom cover. At the same time, the waterproof elastic body 13 can provide moderate compression when the bottom cover is closed, which not only ensures the sealing effect, but also reduces the disassembly resistance caused by excessive compression. Therefore, the structural design of the middle frame assembly 1 can also consider the convenience of disassembling the bottom cover.

[0057] In addition, by adopting the above-mentioned structural design of the middle frame assembly 1, not only the cost is low, but also the external appearance and overall size of the electronic device do not need to be changed, which can maintain the same appearance design as the conventional electronic device. Therefore, the middle frame assembly 1 is conducive to considering the waterproof performance, cost demand and overall appearance of the electronic device.

[0058] Figure 2 is a structural schematic diagram of a middle frame provided by an embodiment of the present application. As Figure 2As shown, the annular groove 111 is arranged on the outer side of the middle frame 11, the width of the annular groove 111 is less than the width of the outer side of the middle frame 11, and the annular groove 111 is arranged close to the top surface of the middle frame 11. The top surface of the middle frame 11 is the surface of the middle frame 11 far away from the bottom cover. By arranging the annular groove 111 close to the top surface of the middle frame 11 and the width of the annular groove 111 being less than the width of the outer side of the middle frame 11, it is beneficial for the subsequent assembly and clamping of the middle frame 11 and the bottom cover. This makes the waterproof sealing ring 12 close to the top side gap of the electronic device which is most prone to water, forming an interception barrier. At the same time, the width constraint of the annular groove 111 not only reserves the complete support structure for the peripheral area, but also effectively concentrates the contact stress by limiting the deformation direction of the sealing ring. Therefore, the design of the above-mentioned annular groove 111 can balance the structural strength and sealing performance of the middle frame assembly in a limited space, thereby improving the anti-leakage capability of the edge area of the electronic device.

[0059] Referring to Figure 2 In some embodiments, the outer side of the middle frame 11 can include a key assembly. The key assembly is used to provide a user with a physical control interface to directly trigger basic functions such as turning on the machine and adjusting the volume. For example, the outer side of the middle frame 11 can include a plurality of key assemblies.

[0060] Continuing to refer to Figure 2 In some embodiments, the outer side of the middle frame 11 includes a stepped structure arranged close to the top surface of the middle frame 11, and the annular groove 111 is arranged on the side of the stepped structure away from the top surface of the middle frame 11. The stepped structure can provide an assembly interface for the bottom cover of the electronic device on the one hand, and by accommodating the thickness of the bottom cover, the two form a flat outer surface after assembly, improving the integrity and aesthetics of the appearance of the electronic device. On the other hand, the stepped structure can be arranged adjacent to the annular groove 111, which is beneficial to the positioning accuracy of the waterproof sealing ring, so that it forms a more concentrated sealing pressure belt in a limited space, enhancing the interface anti-leakage capability.

[0061] Figure 3 is a structural schematic diagram of a middle frame assembly provided by an embodiment of the present application. As Figure 3 shown, the waterproof sealing ring 12 is arranged in the annular groove 111, and the waterproof elastic body 13 is arranged on the bottom surface of the middle frame 11.

[0062] Figure 4 is Figure 3 a local enlarged schematic diagram of the middle B area. As Figure 4 shown, the waterproof sealing ring 12 is embedded in the annular groove 111, and the waterproof elastic body 13 is arranged on the bottom surface of the middle frame 11.

[0063] Figure 5 is another exploded schematic diagram of a middle frame assembly provided by an embodiment of the present application. As Figure 5As shown, the middle frame assembly 1 can further include an antenna 14, which is disposed between the middle frame 11 and the waterproof elastic body 13, and at least part of the antenna 14 is wrapped on the outer side surface, the bottom surface and the inner side surface of the middle frame 11. In the embodiment of the present application, at least part of the antenna 14 is disposed on the outer side surface, the bottom surface and the inner side surface of the middle frame 11, so that all exposed parts of the antenna 14 on the bottom surface of the middle frame 11 can be completely wrapped by the waterproof elastic body. In this way, the antenna 14 can be further isolated from the external liquid environment, which not only helps to improve the waterproof reliability of the antenna 14 body area, but also enhances the overall waterproof performance of the middle frame assembly 1 in the electronic device.

[0064] Figure 6 is Figure 2 A local enlarged view of the middle A area. As Figure 5 shown, in some embodiments, the antenna 14 has a size on the surface of the bottom surface of the middle frame 11 substantially consistent with the middle frame width of the bottom surface, and the remaining part is disposed on the outer side surface and the inner side surface of the middle frame 11, so that the antenna 14 can be bent to the non-exposed area of the middle frame assembly 1, and the exposed area of the antenna 14 on the surface of the middle frame assembly 1 can be reduced. This helps to reduce the risk of liquid entering the internal part of the electronic device along the antenna path through capillary action or surface tension, thereby reducing the potential liquid penetration channel from the physical structure.

[0065] In some embodiments, the surface of the middle frame 11 is provided with a stepped structure at a predetermined position corresponding to the antenna 14 layout area. Due to the physical thickness of the antenna 14 itself, a positioning accommodation area of the antenna 14 can be formed through the local height difference of the stepped structure, so that the surface of the antenna 14 remains smooth transition with the outer peripheral surface of the middle frame 11 after assembly. This not only helps to maintain a certain dielectric distance between the antenna radiator and the metal shell, but also reduces the surface protrusion caused by the antenna assembly, so as to balance the antenna performance, structural reliability and appearance flatness in limited space.

[0066] In the embodiment of the present application, the middle frame 11 is an integral molding structure. By using the integral molding process to manufacture the middle frame 11, it is helpful to reduce the assembly gap at the joint of the traditional spliced middle frame. Therefore, this seamless structure can effectively reduce the path of liquid entering the internal part of the electronic device through the gap between the components, improve the basic protection ability of the middle frame 11 body, and thus help to promote the overall waterproof reliability of the electronic device.

[0067] Exemplarily, the middle frame assembly 1 can further include a spring plate arranged on the surface of the antenna 14 for realizing electrical connection and signal transmission between the antenna 14 and the internal circuit of the electronic device. In the embodiment of the present application, since at least part of the antenna 14 is wrapped on the outer side surface, the bottom surface and the inner side surface of the middle frame 11, the spring plate can be correspondingly arranged on the surface of the antenna 14 on the inner side surface of the middle frame 11. This can make full use of the three-dimensional space of the antenna 14 in the vertical direction, so that the spring plate and the corresponding contact points of the mainboard form stable and reliable vertical contact.

[0068] In some embodiments, the middle frame 11 can further include at least one of a charging interface and an earphone interface, and a waterproof sealing ring 12 is arranged at the assembly interface of the corresponding interface. The waterproof sealing ring 12 forms a ring-shaped sealing barrier in the interface by interference fit, and when the external plug is connected, the elastic body structure can adaptively fill the micro gap between the plug and the inner wall of the interface, thereby effectively blocking the liquid penetration path, improving the anti-splashing and moisture-proof capability of the area while maintaining the normal function of the interface.

[0069] In some embodiments, the middle frame assembly 1 can further include a support 15, the middle frame 11 is arranged on the periphery of the support 15, the bottom surface of the middle frame 11 is coplanar with the bottom surface of the support 15, and the bottom surface of the support 15 is the surface of the support 15 facing the bottom cover. The support 15 can improve the rigid support of the camera, interface and other areas by local reinforcement, so that the structure remains intact when subjected to impact or continuous pressure; at the same time, the support 15 provides a flat and uniform pressure bearing base for the waterproof elastic body 13, reduces the uneven sealing interface pressure caused by assembly tolerance or material deformation, thereby maintaining long-term waterproof performance. Compared with the traditional scheme of arranging the support on the side of the middle frame assembly, the support 15 in the embodiment of the present application does not extend to the side area of the middle frame assembly 1, but is completely integrated in the interior of the middle frame 11, that is, the middle frame 11 is arranged on the periphery of the support 15. This design can effectively reduce the assembly holes or seams on the side wall of the middle frame assembly 1, and fundamentally reduce the risk of liquid intrusion into the interior of the electronic device through the lateral interface. In addition, the coplanar arrangement of the bottom surface of the middle frame 11 and the bottom surface of the support 15 is beneficial to the subsequent assembly process of the bottom cover. Therefore, by arranging the middle frame 11 on the periphery of the support 15, the overall waterproof reliability of the middle frame assembly 1 can be improved.

[0070] In some embodiments, the waterproof elastic body 13 is further arranged on the bottom surface of the support 15. This can effectively expand the support area of the sealing base in the limited space of the middle frame assembly 1, improve the load uniformity of the waterproof elastic body 13, reduce the sealing failure caused by local suspension or uneven stress, thereby enhancing the sealing stability and durability of the middle frame assembly 1 under complex working conditions.

[0071] Exemplarily, the middle frame assembly 1 can include a plurality of supports 15. By adopting a distributed layout of the plurality of supports 15, the number and position distribution of the supports 15 can be adjusted according to the sealing requirements and structural features of different regions of the middle frame assembly 1. This can not only enhance the adaptability of the structure to different sizes of electronic devices, but also achieve local reinforcement support in the main stress area, thereby maintaining the uniformity of the compression of the waterproof elastomer 13 in the structure of the middle frame assembly 1.

[0072] It should be noted that in the embodiments of the present application, when the middle frame assembly 1 includes a plurality of supports 15, the positions of the plurality of supports 15 are not limited and can be arranged at any position of the middle frame assembly 1.

[0073] Figure 7 is another structural schematic view of a middle frame assembly provided by the embodiments of the present application. As shown in Figure 7 , the middle frame assembly 1 includes two supports 15 arranged at the two ends in the length direction of the middle frame assembly 1. This structural layout forms stable sealing support regions at the two ends, while reserving a complete and continuous space in the middle of the middle frame assembly 1, thereby reserving a sufficient and undisturbed accommodation area for the installation of a battery in the electronic device.

[0074] Optionally, the bottom surface of the support 15 is provided with a first clamping structure 151, the first clamping structure 151 is used for clamping a bottom cover, and the first clamping structure 151 is arranged at the middle region of the bottom surface of the support 15. The middle region of the bottom surface of the support 15 refers to the region of the bottom surface of the support 15 away from the edge of the middle frame 11. In the embodiments of the present application, a plurality of first clamping structures 151 can be arranged. Referring to Figure 7 , the first clamping structure 151 is arranged at the bottom surface of the support 15, which does not affect the waterproof effect of the waterproof elastomer 13. At the same time, arranging the first clamping structure 151 at the middle region of the bottom surface of the support 15 is beneficial to improving the uniformity of the force and the overall structural stability of the middle frame assembly 1. For example, the first clamping structure 151 can be arranged at the region of the surface of the support 15 close to the central axis of the middle frame assembly 1.

[0075] Exemplarily, the first clamping structure 151 can be in the form of a buckle, a hook, a slot, a block, a tongue, a protrusion or a platform. These mechanical interlocking components can form elastic engagement or rigid limiting with corresponding mating parts to achieve quick assembly and reliable connection between components, while maintaining structural compactness and process adaptability.

[0076] In some embodiments, the middle frame assembly 1 comprises a camera module, and the first clamping structure 151 can be arranged in the area close to the camera module in the support 15. This structure design can form a locally enhanced compression force around the camera module when the middle frame assembly 1 is assembled with the bottom cover of the electronic device, thereby strengthening the sealing and mechanical fixing effect of the key area, providing targeted protection for the camera module sensitive to vibration and displacement, and improving the working reliability and service life of the camera module.

[0077] Continuing to refer to Figure 7 , the middle frame assembly 1 can further comprise a guide groove 152 arranged on the bottom surface of the support 15 for installing a subscriber identity module (SIM) card or a memory card. Specifically, the guide groove 152 guides and limits the insertion path of the SIM card holder, so that the user can quickly and accurately complete the card holder filling. In addition, in terms of sealing, the cooperation of the guide groove 152 and the card holder is conducive to promoting the uniform compression of the waterproof sealing ring around the card holder, reducing the sealing failure caused by skewed assembly. Therefore, the design of the guide groove 152 not only improves the user operation convenience, but also enhances the waterproof reliability of the SIM card interface area.

[0078] Exemplarily, the guide groove 152 can install multiple SIM cards or memory cards, which is not limited in the present application.

[0079] In some embodiments, the waterproof elastic body 13 comprises a frame-shaped elastic body matching the bottom surface of the middle frame 11, and the width of the frame-shaped elastic body is greater than or equal to the width of the middle frame 11. Wherein, in the case that the width of the frame-shaped elastic body is greater than the width of the middle frame 11, the part of the waterproof elastic body 13 exceeding the middle frame 11 can extend to the inside of the middle frame 11. This size design can make the waterproof elastic body 13 cover the bottom surface area of the middle frame 11 completely, not only can expand the effective sealing area, but also can enhance the reliability of the sealing system through the redundant design of extending inward, thereby improving the waterproof performance of the middle frame assembly 1.

[0080] In some embodiments, the waterproof elastic body 13 can comprise an irregular frame-shaped elastic body. For the waterproof elastic body 13, the specific structure of the frame-shaped elastic body can be designed according to the specific structure of the middle frame assembly 1. For example, continuing to refer to Figure 5 , in the case that the middle frame assembly 1 comprises a camera module, the frame-shaped elastic body can comprise a frame-shaped elastic body arranged around the camera module.

[0081] In embodiments of the present application, the width of the frame-shaped elastic body is greater than or equal to 0.8 mm. For example, the width of the frame-shaped elastic body can be 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.8 mm, 2.0 mm, or any value within the above range. See Figure 7 , the width of the frame-shaped elastic body can be d in Figure 7 . The width of the frame-shaped elastic body described above can enable the waterproof elastic body 13 to maintain sufficient material volume after compression deformation, thereby continuously providing effective contact pressure at the sealing interface. In this way, the problem of sealing pressure drop caused by insufficient local width can be effectively reduced, thereby improving the sealing stability and reliability of the waterproof elastic body 13 under long-term use conditions, thereby facilitating the enhancement of the overall waterproof performance of the middle frame assembly 1.

[0082] Optionally, the width of the frame-shaped elastic body is greater than or equal to 1.2 mm. For example, the width of the frame-shaped elastic body can be 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, or any value within the above range. In this way, the frame-shaped elastic body has a more suitable width, which facilitates further improvement of the overall waterproof performance of the middle frame assembly 1.

[0083] In some embodiments, the thickness of the waterproof elastic body 13 is greater than or equal to 0.45 mm and less than or equal to 0.65 mm. For example, the thickness of the waterproof elastic body can be 0.45 mm, 0.48 mm, 0.50 mm, 0.53 mm, 0.56 mm, 0.58 mm, 0.60 mm, 0.62 mm, 0.65 mm, or any value within the above range. Setting the thickness of the waterproof elastic body 13 within the above range facilitates the generation of moderate elastic compression deformation of the bottom cover when it is compressed, which can form sufficient contact stress to achieve effective sealing, and can also reduce permanent deformation or excessive disassembly resistance caused by excessive compression. Therefore, the above thickness range enables the waterproof elastic body 13 to maintain good elastic recovery capability in the assembled state, thereby maintaining a stable sealing interface during long-term use, thereby facilitating improvement of the waterproof durability of the middle frame assembly 1.

[0084] Optionally, the thickness of the waterproof elastic body 13 is 0.45 mm. In this way, the waterproof elastic body 13 has a more suitable thickness, which can further improve the overall waterproof performance of the middle frame assembly 1.

[0085] For example, the working height of the waterproof elastic body 13 is 0.25 mm. In this way, the waterproof elastic body 13 can provide moderate compression and resilience for the sealing interface after the bottom cover is assembled, effectively filling the structural gap to form reliable sealing, and reducing excessive disassembly resistance or plastic deformation of the material caused by excessive compression.

[0086] In some embodiments, the depth of the annular groove 111 is greater than the diameter of the waterproof sealing ring 12. This facilitates the provision of necessary deformation redundancy for the waterproof sealing ring 12 during the compression of the bottom cover. Specifically, during the assembly of the electronic device bottom cover, the reserved gap allows the waterproof sealing ring 12 to be sufficiently compressed and deformed within the annular groove 111, which not only forms sufficient contact stress to achieve effective sealing, but also reduces excessive assembly resistance or permanent damage to the waterproof sealing ring 12 caused by complete filling of the groove cavity. Therefore, by setting the depth of the annular groove 111 and the diameter of the waterproof sealing ring 12, the waterproof reliability of the electronic device is improved, and the smoothness of the bottom cover disassembly and the durability of the waterproof sealing ring 12 are also facilitated.

[0087] In some embodiments, the depth of the annular groove 111 is greater than or equal to 1.0 mm and less than or equal to 1.1 mm. For example, the depth of the annular groove can be 1.0 mm, 1.02 mm, 1.04 mm, 1.06 mm, 1.08 mm, 1.1 mm, or any value within the above range. The depth of the annular groove 111 meets the above range, which not only facilitates the generation of sufficient contact stress by the waterproof sealing ring 12 during the compression of the bottom cover to achieve effective sealing, but also reduces permanent deformation of the material or excessive disassembly resistance caused by excessive compression. Therefore, this depth range can maintain the stable elastic recovery force of the waterproof sealing ring 12 during long-term use, which is beneficial to both the long-term waterproof performance and the convenience of bottom cover disassembly and the service life of the component.

[0088] For example, the diameter of the waterproof sealing ring can be 0.95 mm, 0.96 mm, 0.97 mm, 0.98 mm, 0.99 mm, 1.0 mm, or any value within the above range. By setting the diameter of the waterproof sealing ring 12 within the above range, the diameter of the waterproof sealing ring 12 can be matched with the depth of the annular groove 111, so that the waterproof sealing ring 12 can achieve a suitable compression rate after assembly. This not only allows the waterproof sealing ring 12 to generate sufficient contact stress to block the liquid penetration path in the compressed state, but also maintains an appropriate deformation allowance to avoid excessive extrusion, thereby balancing its sealing reliability and long-term stability.

[0089] In some embodiments, the deformation of the waterproof sealing ring 12 is greater than or equal to 0.05 mm and less than or equal to 0.1 mm when the middle frame 11 is mutually buckled with the bottom cover. The deformation of the waterproof sealing ring can be 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm or any value within the above range. The deformation refers to the difference between the cross-sectional diameter of the waterproof sealing ring 12 in a free state and the height after being compressed and installed in the annular groove 111. By controlling the deformation within the above range, the waterproof sealing ring 12 can generate sufficient compression deformation during assembly to establish an effective sealing pressure, and it is also beneficial to reduce the excessive interference that causes assembly difficulties or plastic damage to the waterproof sealing ring 12, thereby improving the reliability and durability of the waterproof sealing ring 12.

[0090] Optionally, the deformation of the waterproof sealing ring 12 is 0.07 mm. In this way, the waterproof sealing ring 12 has a more appropriate deformation, which is beneficial to further improve the reliability and durability of the waterproof sealing ring 12.

[0091] Optionally, the depth of the annular groove 111 is 1.1 mm, and the diameter of the waterproof sealing ring 12 is 1.0 mm. This size cooperation forms a sealing structure with a predetermined interference amount, which can make the waterproof sealing ring 12 produce a controllable elastic deformation in the annular groove 111 during the pressing process of the bottom cover. It can form sufficient contact stress on the sealing interface to block the liquid penetration path, and also reserve the necessary deformation allowance for the disassembly process.

[0092] In some embodiments, the material of the waterproof elastic body 13 includes waterproof foam. Specifically, the waterproof foam has excellent resilience and closed cell structure, which can fully fill the structural gap by elastic deformation during the pressing of the bottom cover, and quickly recover to its original state after the pressure is removed. Therefore, the compression deformation resistance of the waterproof foam is beneficial to provide a long-lasting and effective sealing pressure. At the same time, the waterproof foam is also resistant to moisture and temperature changes, and can provide stable and reliable splash protection for electronic devices.

[0093] Optionally, the waterproof foam includes closed-cell polyurethane foam. The closed-cell polyurethane foam is composed of a large number of independently closed cells, and the cell structures are not connected to each other, which is beneficial to fundamentally block the liquid capillary penetration path. Specifically, the urethane groups in the molecular chain of the material endow it with excellent mechanical toughness and compression deformation resistance, and the gas sealed in the closed cell structure can provide additional elastic recovery force. At the same time, the unique cross-linked network structure also endows the material with good hydrolysis resistance and temperature resistance, so that it can maintain stable physical properties and sealing effect under long-term compression and humid heat environment.

[0094] In some embodiments, the material of the waterproof sealing ring 12 includes at least one of a thermoplastic elastomer and silica gel. Among them, the thermoplastic elastomer has both the processing performance of plastic and the elasticity of rubber, which can realize efficient production of complex structures through injection molding, and has good fatigue resistance and repeatable disassembly performance; silica gel has good biocompatibility, high and low temperature resistance, and stable chemical inertness, and can maintain elasticity in a wide temperature range and long-term exposure to harsh environments without aging or performance degradation. In the application scenario of the middle frame assembly 1, the appropriate material of the waterproof sealing ring 12 can be selected according to the specific needs.

[0095] Optionally, the thermoplastic elastomer includes thermoplastic polyurethane. The molecular chain of thermoplastic polyurethane can form a physical cross-linking network through the micro-phase separation of rigid segments and flexible segments, and this structure makes it have high strength and high elasticity mechanical characteristics at the same time, and has good wear resistance and tear resistance. The material can maintain stable mechanical performance in a wide temperature range, and has excellent oil resistance and chemical medium resistance. The adjustable hardness characteristics combined with the injection molding process make it suitable for application scenarios with high requirements for structural strength and sealing durability.

[0096] The electronic device provided by the embodiment of the present application includes a bottom cover 2 and the middle frame assembly 1 in any of the above embodiments, and the bottom cover 2 is buckled on one side of the middle frame assembly 1.

[0097] Optionally, the electronic device can further include a screen assembly (not shown in the figure), and the screen assembly is installed on the other side of the middle frame assembly 1.

[0098] Figure 8 is a planar structure schematic diagram of a middle frame assembly and a bottom cover provided by the embodiment of the present application. As shown in Figure 8 The surface of the bottom cover 2 close to the middle frame assembly 1 is provided with a second clamping structure 21, and the second clamping structure 21 is correspondingly arranged with the first clamping structure 151. Among them, the second clamping structure 21 can be a buckle, a hook, a slot, a block, a tongue, a convex or a table. These mechanical interlocking components can form elastic engagement or rigid limiting with the corresponding mating parts to realize quick assembly and reliable connection with the first clamping structure 151, while maintaining compact structure and process adaptability. For example, the first clamping structure 151 can be a buckle, and the second clamping structure 21 can be a slot, and the buckle and the slot are matched with each other to form a mechanical connection.

[0099] In some embodiments, the bottom cover 2 has a clamping amount of 0.3 mm and a guide slope of 10°. Through the combination of the clamping amount and the guide slope, the clamping amount can be achieved by the guide slope during the clamping of the bottom cover 2, so that a predetermined interference amount is generated when clamped in place. This is beneficial to make the bottom cover 2 continuously apply uniform compression force to the waterproof elastomer 13 in the closed state, so that it reaches a compression state and forms an effective waterproof barrier. At the same time, the controllable interference amount can also reduce the difficulty of disassembly or component damage caused by excessive compression, thereby balancing the sealing performance and maintainability of the middle frame assembly 1.

[0100] Figure 9 is an explosion schematic diagram of an electronic device provided by an embodiment of the present application. As shown in Figure 9 the electronic device can include a middle frame 11, a screen assembly 3, a support 15, a waterproof sealing ring 12, a waterproof elastomer 13, and a bottom cover 2. Among them, the middle frame 11 serves as a structural main body to carry various functional components; the screen assembly 3 is fixed inside the middle frame 11, and the support 15 is embedded in the surface of the middle frame 11 close to the bottom cover 2, used to enhance local support; the waterproof sealing ring 12 and the waterproof elastomer 13 are respectively arranged at both ends of the middle frame 11 along the thickness direction, and are engaged with the bottom cover to form a double-sealing barrier; the bottom cover 2 is press-fitted with the middle frame 11 through mechanical connection, so as to balance the waterproof performance of the electronic device and the disassembly convenience of the bottom cover 2.

[0101] In an embodiment of the present application, the electronic device can also include other components such as a battery, etc., which are not limited by the present application.

[0102] In actual application, the materials of the screen assembly and the bottom cover 2 of the electronic device can be selected according to requirements. For example, the material of the screen assembly can be an organic light-emitting diode display screen or a liquid crystal display screen, etc., which can be a rigid screen or a flexible screen; the material of the bottom cover 2 can be a metal material, a plastic material, a ceramic material, etc., which are not limited by the present application.

[0103] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A mid-frame component, characterized in that, Applied to electronic devices, including: The middle frame has an outer side surface for fastening the bottom cover of the electronic device, and the outer side surface of the middle frame is provided with an annular groove. A waterproof sealing ring is disposed within the annular groove; A waterproof elastomer is disposed on the bottom surface of the middle frame, the bottom surface of the middle frame being the surface of the middle frame facing the bottom cover.

2. The mid-frame assembly according to claim 1, characterized in that, The width of the annular groove is less than the width of the outer side of the middle frame, and the annular groove is located close to the top surface of the middle frame, which is the surface of the middle frame away from the bottom cover.

3. The mid-frame assembly according to claim 2, characterized in that, The mid-frame component also includes: An antenna is disposed between the middle frame and the waterproof elastomer, and at least a portion of the antenna covers the outer side, bottom surface and inner side of the middle frame.

4. The mid-frame assembly according to claim 3, characterized in that, The mid-frame component also includes: The bracket has a middle frame disposed around its periphery, the bottom surface of the middle frame being coplanar with the bottom surface of the bracket, and the bottom surface of the bracket being the surface of the bracket facing the bottom cover.

5. The mid-frame assembly according to claim 4, characterized in that, The waterproof elastomer is also disposed on the bottom surface of the bracket.

6. The mid-frame assembly according to claim 5, characterized in that, The bottom surface of the bracket is provided with a first snap-fit ​​structure, which is used to snap the bottom cover. The first snap-fit ​​structure is located in the middle area of ​​the bottom surface of the bracket.

7. The mid-frame assembly according to any one of claims 1 to 6, characterized in that, The waterproof elastomer includes a frame-shaped elastomer that matches the bottom surface of the middle frame, and the width of the frame-shaped elastomer is greater than or equal to 0.8 mm.

8. The mid-frame assembly according to any one of claims 1 to 6, characterized in that, The thickness of the waterproof elastomer is greater than or equal to 0.45 mm and less than or equal to 0.65 mm.

9. The mid-frame assembly according to any one of claims 1 to 6, characterized in that, The depth of the annular groove is greater than the diameter of the waterproof sealing ring.

10. The mid-frame assembly according to claim 9, characterized in that, The depth of the annular groove is greater than or equal to 1.0 mm and less than or equal to 1.1 mm; and / or, The diameter of the waterproof sealing ring is greater than or equal to 0.95 mm and less than or equal to 1.0 mm.

11. The mid-frame assembly according to any one of claims 1 to 6, characterized in that, When the middle frame and the bottom cover are fastened together, the deformation of the waterproof sealing ring is greater than or equal to 0.05 mm and less than or equal to 0.1 mm.

12. The mid-frame assembly according to any one of claims 1 to 6, characterized in that, The material of the waterproof elastomer includes waterproof foam.

13. The mid-frame assembly according to any one of claims 1 to 6, characterized in that, The waterproof sealing ring is made of at least one of thermoplastic elastomer and silicone.

14. An electronic device, characterized in that, Includes: a bottom cover, and a mid-frame assembly as claimed in any one of claims 1 to 13, wherein the bottom cover is fastened to one side of the mid-frame assembly.

15. The electronic device according to claim 14, characterized in that, The electronic device further includes a screen assembly mounted on the other side of the mid-frame assembly.

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