Waterproof seal and electronic device

Abstract

The application provides a waterproof sealing sleeve and an electronic device. The waterproof sealing sleeve is applied to the electronic device. The electronic device comprises a shell, a circuit board, and a USB interface connected to the circuit board. The shell is provided with a jack, and the USB interface is located at the jack. The waterproof sealing sleeve comprises a first sealing part, a second sealing part, and a third sealing part, which can all absorb water to expand. The first sealing part is arranged at the periphery of the jack and is sealingly connected to the shell. The second sealing part is sealingly connected to the first sealing part, is sealingly connected between the first surface of the circuit board and the shell, and surrounds the USB interface. The third sealing part is sealingly connected to the first sealing part, is sealingly connected to the second surface of the circuit board, and covers the projection of the USB interface on the second surface. The waterproof sealing sleeve improves the sealing effect, the sealing consistency and the waterproof consistency of different waterproof sealing sleeves, and the sealing consistency and the waterproof consistency of different electronic devices.

Description

Technical Field

[0001] This application relates to the field of waterproofing technology for electronic devices, and more particularly to a waterproof sealing sleeve and an electronic device. Background Technology

[0002] Electronic devices, such as mobile phones, typically have a USB port for electrical connection to external devices. The waterproof performance (sealing performance) of the USB port directly affects the overall waterproof performance of the electronic device.

[0003] In electronic devices, a rubber sleeve is usually placed at the USB interface to seal the gap between the USB interface and components such as the mid-frame. However, the sealing at the USB interface varies between different electronic devices.

[0004] Tiny gaps can easily exist between components such as the rubber sleeve and the middle frame. These tiny gaps allow water to easily get in, resulting in poor sealing at the USB interface. Summary of the Invention

[0005] In view of this, this application provides a waterproof sealing sleeve and an electronic device to improve the sealing effect of the electronic device at the USB interface and the sealing consistency of different electronic devices at the USB interface. The disclosed technical solution is as follows:

[0006] In a first aspect, this application provides a waterproof sealing sleeve applied to an electronic device. The electronic device includes: a housing, a circuit board, and a USB interface connected to the circuit board. The housing has a socket, the USB interface is located at the socket, and the circuit board is located inside the housing. The waterproof sealing sleeve includes a first sealing part, a second sealing part, and a third sealing part, all of which are capable of absorbing water and expanding. The first sealing part is disposed around the socket and is sealed to the housing. The second sealing part is sealed to the first sealing part and is sealed between the first surface of the circuit board and the housing, and surrounds the USB interface. The third sealing part is sealed to the first sealing part and is sealed to the second surface of the circuit board, and covers the projection of the USB interface on the second surface. The first and second surfaces are distributed opposite to each other.

[0007] As can be seen from the above, after water enters the electronic device through the socket and USB interface, the first sealing part prevents water from continuing to enter through the gap between the casing and the USB interface. The second sealing part also prevents water from flowing from the USB interface to the first surface of the circuit board and then continuing to enter along the first surface. The third sealing part prevents water from flowing from the USB interface to the second surface of the circuit board and then continuing to enter. Therefore, after water enters the electronic device through the socket and USB interface, the waterproof sealing sleeve prevents water from continuing to enter. Moreover, the waterproof sealing sleeve absorbs water and expands, improving its own sealing effect. Because the waterproof sealing sleeve absorbs water and expands, the expanded waterproof sealing sleeve can fill the tiny gaps between the waterproof sealing sleeve and the components it seals with, improving the sealing effect of the waterproof sealing sleeve. It also improves the sealing consistency of different waterproof sealing sleeves, thereby improving the sealing consistency of different electronic devices. Correspondingly, it improves the waterproof consistency of different waterproof sealing sleeves, and thus improves the waterproof consistency of the electronic devices.

[0008] In one possible implementation, the third sealing part and the second sealing part are arranged side by side and located on the same side of the first sealing part; there is a gap between the third sealing part and the second sealing part so that the waterproof sealing sleeve can be inserted into the circuit board.

[0009] As can be seen from the above, the third sealing part and the second sealing part are arranged side by side and located on the same side of the first sealing part, which facilitates the sealing connection between the third sealing part and the second plate surface, and the sealing connection between the second sealing part and the first plate surface, and also simplifies the structure of the entire waterproof sealing sleeve. There is a gap between the third sealing part and the second sealing part, which allows the waterproof sealing sleeve to be directly inserted into the circuit board, simplifying the assembly of the waterproof sealing sleeve and the circuit board.

[0010] In one possible implementation, the first sealing portion has a first opening that accommodates the USB interface, the first opening being located around the periphery of the socket; the second sealing portion has a second opening that accommodates the USB interface, the second opening communicating with the first opening and forming a circumferentially closed through hole.

[0011] As can be seen from the above, since the circuit board has a USB interface before the waterproof sealing sleeve is installed, the USB interface can enter the circumferentially closed through hole formed by the first and second openings, which facilitates the fitting of the waterproof sealing sleeve onto the circuit board; at the same time, the circumferential closure of the through hole helps to ensure the sealing effect of the waterproof sealing sleeve.

[0012] In one possible implementation, both the first sealing part and the second sealing part are provided with a first sealing rib that can absorb water and expand, and both the first sealing part and the second sealing part are sealed to the shell through the first sealing rib.

[0013] As can be seen from the above, both the first sealing part and the second sealing part are provided with a first sealing rib. The first sealing rib can interfere with the shell, which effectively improves the sealing effect of the first sealing part and the sealing effect of the second sealing part. Since the first sealing rib can interfere with the shell, it can also increase the force between the shell and the waterproof sealing sleeve, further improving the sealing effect and sealing reliability of the waterproof sealing sleeve.

[0014] In one possible implementation, there are at least two first sealing ribs, one of which is located on the periphery of the other in two adjacent first sealing ribs; the housing is provided with a second sealing rib; two adjacent first sealing ribs form a sealing groove, the sealing groove accommodates the second sealing rib, and the sealing groove and the second sealing rib are sealed together.

[0015] As can be seen from the above: the first and second sealing ribs extend the flow path of moisture, which can delay the entry of moisture into the internal space of electronic devices, improve the sealing effect, and reduce the risk of moisture damaging circuit boards and other components; the first and second sealing ribs mutually limit each other, which can reduce the probability of the first and second sealing ribs turning over during the assembly of the waterproof sealing sleeve, thereby improving the sealing reliability of the waterproof sealing sleeve; the interference fit between the first and second sealing ribs effectively improves the sealing effect; the first and second sealing ribs increase the contact area between the waterproof sealing sleeve and the shell, thereby increasing the interaction force between the waterproof sealing sleeve and the shell, and improving the sealing effect and sealing reliability between the waterproof sealing sleeve and the shell.

[0016] In one possible implementation, the USB interface includes a USB interface body and pins, with one end of the pins connected to the USB interface body and the other end of the pins connected to a circuit board; a second sealing portion is disposed around the USB interface body and covers the pins.

[0017] As can be seen from the above, the second sealing part is located on the periphery of the USB interface body and covers the pins. This prevents water from flowing from the pins to the first board surface, improving sealing and waterproofing performance.

[0018] In one possible implementation, the electronic device further includes a clamping component located inside the housing, a circuit board located between the clamping component and the housing, and the clamping component and the housing being fixedly connected; a waterproof sealing sleeve is disposed between the clamping component and the housing, and the waterproof sealing sleeve is pressed against the housing and the circuit board by the clamping component.

[0019] As can be seen from the above, the waterproof sealing sleeve is pressed tightly onto the housing and circuit board by the clamping component. This facilitates the installation of the waterproof sealing sleeve and also helps to ensure the sealing effect of the waterproof sealing sleeve.

[0020] In one possible implementation, the housing includes a middle frame, which includes a fixedly connected frame and a support plate. The socket is located on the frame, and the support plate is provided with a mounting groove for accommodating and limiting the USB interface. A first sealing part is sealed to the frame, and a second sealing part is sealed to the support plate. The first sealing part is pressed against the frame by a pressing member, and the second sealing part is pressed against the support plate and the circuit board by the pressing member.

[0021] As can be seen from the above, the first sealing part is pressed against the frame by the pressing component, and the second sealing part is pressed against the support plate and the circuit board by the pressing component. In this way, the sealing effect of the first sealing part and the second sealing part is improved by the pressing force of the pressing component.

[0022] In one possible implementation, the clamping component is a device support within the housing.

[0023] As can be seen from the above, the clamping component is a device support inside the housing. In this way, the internal components of the electronic device are fully utilized to fix the waterproof sealing sleeve, simplifying the internal structure of the electronic device, improving the structural compactness of the electronic device, and avoiding increasing the cost of the electronic device.

[0024] In one possible implementation, the third sealing part and the clamping part are sealed together.

[0025] As can be seen from the above, the third sealing part can also be sealed to the pressing component. Thus, in the event of a failure in the sealing connection between the third sealing part and the second plate surface, the third sealing part can prevent water from continuing to enter through the gap between the third sealing part and the pressing component, further improving the sealing and waterproofing effects.

[0026] In one possible implementation, the third sealing part is provided with a third sealing rib that can absorb water and expand, and the third sealing part is sealed and connected to the pressing component through the third sealing rib.

[0027] As can be seen from the above, the third sealing rib can interfere with the clamping component, which effectively improves the sealing effect of the third sealing part. Due to the interference between the third sealing rib and the clamping component, the clamping force of the clamping component on the waterproof sealing sleeve can also be increased, further improving the sealing effect and sealing reliability of the waterproof sealing sleeve.

[0028] In one possible implementation, there are at least two third sealing ribs, with one of the two adjacent third sealing ribs located on the periphery of the other.

[0029] As can be seen from the above, at least two third sealing ribs extend the flow path of moisture, which can delay the entry of moisture into the internal space of electronic devices, improve the sealing effect, and reduce the risk of moisture damaging the internal components of electronic devices.

[0030] In one possible implementation, the clamping component includes: a first clamping component portion and a second clamping component portion fixedly connected, wherein the first clamping component portion and the second clamping component portion have different thicknesses, the first clamping component portion is fixedly connected to the housing, and the second clamping component portion contacts the circuit board; a third sealing portion contacts the first clamping component portion; and / or, the clamping component portion is provided with a protrusion, the third sealing portion portion is provided with a recess, the recess is provided to accommodate the protrusion, and the recess and the protrusion abut against each other.

[0031] As can be seen from the above, the clamping component can clamp both the circuit board and the waterproof sealing sleeve; the first part of the clamping component is fixedly connected to the housing, and the first part of the clamping component is in contact with the third sealing part, which improves the reliability of the clamping component clamping the waterproof sealing sleeve; through the cooperation of the protrusion and the recess, the clamping force applied by the clamping component to the waterproof sealing sleeve is increased, which improves the reliability of the clamping component clamping the waterproof sealing sleeve.

[0032] In one possible implementation, the housing includes a metal portion and a plastic portion, with a waterproof sealing sleeve and the plastic portion sealed together.

[0033] As can be seen from the above, the waterproof sealing sleeve and the plastic part of the shell are sealed together, avoiding the impact of the shell's step difference and joint seam (the joint seam between the metal part and the plastic part) on the sealing effect, thus improving the sealing effect of the waterproof sealing sleeve 150.

[0034] In one possible implementation, the volume expansion rate of the waterproof sealing sleeve is greater than or equal to 10% / 5min, and the maximum volume expansion rate of the waterproof sealing sleeve is less than or equal to 50%; the tensile strength of the waterproof sealing sleeve is not less than 3MPa, the elongation at break of the waterproof sealing sleeve is not less than 150%, the compression set of the waterproof sealing sleeve is not greater than 20%, and the tear resistance of the waterproof sealing sleeve is not less than 10KN / m.

[0035] As can be seen from the above, the volume expansion rate of the waterproof sealing sleeve is not less than 10% / 5min, which allows it to expand instantly upon contact with water, preventing further water intrusion into the interior of the electronic device and improving the waterproof effect and waterproof rating. The maximum volume expansion rate of the waterproof sealing sleeve is not greater than 50%, effectively controlling the maximum volume of the waterproof sealing sleeve after water absorption and expansion, so that the internal space of the electronic device can accommodate the waterproof sealing sleeve after water absorption and expansion, which can avoid increasing the volume of the electronic device and avoid the bottom shell of the electronic device from delaminating.

[0036] In one possible implementation, the material of the waterproof sealing sleeve includes: 100 parts by weight of rubber matrix material, 25-35 parts by weight of water-absorbing and swelling resin, 20-35 parts by weight of reinforcing agent, 3-7 parts by weight of vulcanizing agent, 1-3 parts by weight of accelerator, 1-3 parts by weight of activator, and 1-4 parts by weight of anti-aging agent; wherein the rubber matrix material is EPDM rubber, and the particle size of the water-absorbing and swelling resin is 150-300 mesh.

[0037] As can be seen from the above, using EPDM rubber as the rubber matrix material and combining it with water-absorbing and swelling resin, reinforcing agent, vulcanizing agent, accelerator, activator, and anti-aging agent in a certain proportion to prepare water-absorbing and swelling rubber materials can combine the aging resistance of EPDM rubber with the water-absorbing and swelling properties of water-absorbing and swelling resin. Moreover, the particle size of the water-absorbing and swelling resin is 150-300 mesh, which gives the water-absorbing and swelling rubber materials certain volume expansion plasticity, maximum volume expansion rate, and mechanical properties, meeting the requirements of waterproof sealing sleeves.

[0038] In one possible implementation, the material of the waterproof sealing sleeve comprises sodium polyacrylate as the water-absorbing and swelling resin, carbon black as the reinforcing agent, sulfur as the vulcanizing agent, accelerators including TMTD and zinc oxide, and octadecanoic acid as the activator. The material of the waterproof sealing sleeve includes: 100 parts by weight of the main rubber component, 15-25 parts by weight of the water-absorbing and swelling resin, 20-35 parts by weight of the reinforcing agent, 3-5 parts by weight of the vulcanizing agent, 1-4 parts by weight of the accelerator, 2-4 parts by weight of the activator, and 1-4 parts by weight of the anti-aging agent. The main rubber component includes: 70-80 parts by weight of the rubber matrix material and 20-30 parts by weight of the polar rubber. The rubber matrix material is EPDM rubber, and the polar rubber includes polyurethane, nitrile rubber, or acrylate rubber. The particle size of the water-absorbing and swelling resin is 150-300 mesh.

[0039] In one possible implementation, the material of the waterproof sealing sleeve comprises: polar rubber of polyurethane, water-absorbing and swelling resin of sodium polyacrylate, reinforcing agent of carbon black, vulcanizing agent of sulfur, accelerator including accelerator TMTD and zinc oxide, and activator of octadecanoic acid; the material of the waterproof sealing sleeve comprises: 75 parts by weight of EPDM rubber, 25 parts by weight of polyurethane, 20 parts by weight of sodium polyacrylate, 25 parts by weight of carbon black, 4 parts by weight of sulfur, 1 part by weight of accelerator TMTD, 1 part by weight of zinc oxide, 3 parts by weight of octadecanoic acid, and 2 parts by weight of anti-aging agent.

[0040] As can be seen from the above, using EPDM rubber as the rubber matrix material and combining EPDM rubber with polar rubber as the main rubber components improves the hydrophilicity of the main rubber components. Preparing a water-swellable rubber material by combining the main rubber components, water-absorbing and swelling resin, reinforcing agent, vulcanizing agent, accelerator, activator, and anti-aging agent in a certain proportion can combine the aging resistance of EPDM rubber, the hydrophilicity of polar rubber, and the water-absorbing and swelling properties of water-absorbing and swelling resin. Furthermore, the particle size of the water-absorbing and swelling resin is 150-300 mesh, giving the water-absorbing and swelling rubber material a certain volume expansion plasticity, maximum volume expansion rate, and mechanical properties, meeting the requirements of a 150mm waterproof sealing sleeve.

[0041] Secondly, this application provides an electronic device including the waterproof sealing sleeve proposed in the first aspect or any of the possible embodiments.

[0042] As can be seen from the above, the electronic device in this application includes the waterproof sealing sleeve proposed in the first aspect or any possible implementation. Therefore, the electronic device with the waterproof sealing sleeve also has all the above-mentioned technical effects, which will not be repeated here.

[0043] In one possible implementation, there is a clearance between the waterproof sealing sleeve and the electronic components surrounding the waterproof sealing sleeve, and the clearance is not less than 0.6 mm.

[0044] As can be seen from the above, the clearance provides space for the waterproof sealing sleeve to absorb water and expand, thereby avoiding interference between the waterproof sealing sleeve and the electronic components around it. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application;

[0046] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0047] Figure 3 A schematic diagram illustrating the installation of a waterproof sealing sleeve in an electronic device provided in this application embodiment;

[0048] Figure 4 This is a schematic diagram of the structure of a waterproof sealing sleeve in an electronic device provided in an embodiment of this application;

[0049] Figure 5 This is a schematic diagram of the waterproof sealing sleeve in an electronic device provided in an embodiment of this application from another direction;

[0050] Figure 6 A partial structural diagram of the mid-frame of the electronic device provided in an embodiment of this application;

[0051] Figure 7 This is a schematic diagram showing the connection between the USB interface and the circuit board in an electronic device provided in an embodiment of this application;

[0052] Figure 8 This is a schematic diagram of the structure of the bracket in the electronic device provided in the embodiments of this application;

[0053] Figure 9 This is an assembly diagram of the bracket and waterproof sealing sleeve in an electronic device provided in an embodiment of this application;

[0054] Figure 10 for Figure 2 Top view of the structure shown in Figure (2);

[0055] Figure 11 for Figure 10 An enlarged view of the BB-directed sectional view;

[0056] Figure 12 for Figure 2 The front view of the structure shown in Figure (2);

[0057] Figure 13 for Figure 12 Enlarged view of the CC-direction section;

[0058] Figure 14 This is a schematic diagram showing the relative positions of the waterproof sealing sleeve and electronic components in an electronic device provided in an embodiment of this application. Detailed Implementation

[0059] The terms "first," "second," and "third," etc., used in this application specification, claims, and drawings are used to distinguish different objects, not to limit a specific order.

[0060] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0061] The terms "parallel" and "perpendicular" used in this application refer to "basically parallel" and "basically perpendicular" in practical operation. "Basically parallel" can be understood as parallelism with a certain degree of error, and similarly, "basically perpendicular" can be understood as perpendicularity with a certain degree of error.

[0062] The “plane” referred to in this application is a “plane that is substantially parallel to the horizontal plane” in actual operation.

[0063] This application provides an electronic device to improve the sealing effect of the electronic device at the USB (Universal Serial Bus) interface and the sealing consistency of different electronic devices at the USB interface.

[0064] Electronic devices can include mobile phones, tablets, laptops, ultra-mobile personal computers (UMPCs), handheld computers, netbooks, personal digital assistants (PDAs), wearable electronic devices, and smartwatches.

[0065] The electronic device can be a low-to-mid-range electronic device or a high-end electronic device; this application does not limit this.

[0066] The following explanation uses a mobile phone as an example to illustrate electronic devices.

[0067] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 2 for Figure 1 A magnified view of part A in the image. It should be noted that... Figure 2 Removed from the middle Figure 1 The display screen and other components of the electronic device. Figure 2 The middle frame and the circuit board are shown.

[0068] Combination Figure 1 and Figure 2 As shown, the electronic device 100 includes a display screen 110, a middle frame 120, and a bottom shell (not shown in the figure). The display screen 110 is fixedly connected to one side of the middle frame 120, and the bottom shell is fixedly connected to the other side of the middle frame 120, so that the display screen 110, the middle frame 120, and the bottom shell form the internal space of the electronic device 100.

[0069] The internal space of the electronic device 100 contains a circuit board (not shown in the figure), which is electrically connected to a USB interface 170.

[0070] The USB interface 170 can be a flat interface such as a Type-C interface, a Type-A interface, or a Type-B interface. This application embodiment does not limit the type of the USB interface 170.

[0071] The middle frame 124 is provided with a jack 124, and the USB interface 170 is located in the jack 124 so that the USB interface 170 can be electrically connected to external devices such as headphones, charging cables, and storage disks.

[0072] The middle frame 120 is rectangular, and the USB ports 170 are located on the short side of the middle frame 120. In practice, the USB ports 170 can also all be located on the long side of the middle frame 120.

[0073] The middle frame 120 can also be other shapes, not limited to the rectangle described above. The specific positions of the USB interface 170 and the socket 124 on the middle frame 120 are selected according to the actual situation, and this application embodiment does not limit this.

[0074] It should be noted that both the middle frame 120 and the bottom shell can be understood as part of the housing of the electronic device 100.

[0075] There is a gap between the USB interface 170 and the socket 124, which allows water to easily enter the internal space of the electronic device 100, such as the area where the circuit board is located, affecting the performance of the internal components of the electronic device 100. To prevent water from entering the internal space of the electronic device 100 through the aforementioned gap, the USB interface 170 needs to be sealed.

[0076] To improve the sealing effect of the electronic device 100 at the USB interface 170 and to ensure the sealing consistency of different electronic devices 100 at the USB interface 170, the electronic device 100 also includes a waterproof sealing sleeve 150 and a bracket 140. The waterproof sealing sleeve 150 is a water-absorbing and expanding component.

[0077] The bracket 140 is located near the bottom shell of the electronic device 100. The waterproof sealing sleeve 150 is located between the bracket 140 and the middle frame 120. The bracket 140 and the middle frame 120 are fixedly connected so that the waterproof sealing sleeve 150 is pressed against the middle frame 120 and the circuit board 130 by the bracket 140. This facilitates the installation of the waterproof sealing sleeve 150 and also helps to ensure the sealing effect of the waterproof sealing sleeve 150.

[0078] The bracket 140 is a component support inside the electronic device 100, used to support the components inside the electronic device 100. For example, the bracket 140 can be a speaker bracket. In this way, the internal components of the electronic device 100 are fully utilized to fix the waterproof sealing sleeve 150, simplifying the internal structure of the electronic device 100, improving the structural compactness of the electronic device 100, and avoiding increasing the cost of the electronic device 100.

[0079] It should be noted that the bracket 140 can also be an additional component inside the electronic device 100, as long as it can ensure the fixation of the waterproof sealing sleeve 150. The bracket 140 can be understood as a form of clamping component.

[0080] The bracket 140 and the middle frame 120 are detachably fixedly connected to facilitate installation, disassembly, and maintenance. For example, the bracket 140 is detachably fixedly connected to the middle frame 120 via a fastener 160, which can be a screw or bolt, etc. The bracket 140 is provided with a bracket fixing hole 143 for mounting the fastener 160, and the middle frame 120 is provided with a threaded hole 123 that engages with the threaded fastener 160.

[0081] To prevent the fastener 160 from affecting other components of the electronic device 100, the bracket mounting hole 143 can be a countersunk hole, and the fastener 160 does not protrude from the threaded hole 123.

[0082] In practice, the bracket 140 can also be fixedly connected to the middle frame 120 through a snap-fit ​​structure, welding or other structures, but this application embodiment does not limit this.

[0083] Figure 3 This is an installation diagram for the waterproof sealing sleeve 150. Figure 3 The image shows a portion of the middle frame 120 and a portion of the circuit board 130.

[0084] like Figure 3 As shown, the middle frame 120 includes a frame 121 and a support plate 122, which are fixedly connected. The frame 121 and the support plate 122 can be an integral structure or a separate structure. To simplify installation, the frame 121 and the support plate 122 are an integral structure.

[0085] The frame 121 is located around the support plate 122. The aforementioned socket 124 is located on the frame 121. The support plate 122 supports the USB interface 170 and the waterproof sealing sleeve 150. To facilitate the installation of the USB interface 170, the support plate 122 may be provided with a mounting groove 125 to accommodate and limit the USB interface 170. The limiting direction of the mounting groove 125 for the USB interface 170 is parallel to the surface of the support plate 122. The specific direction of the limiting direction can be selected according to the actual situation, and this embodiment does not limit it.

[0086] As mentioned above, the bracket 140 is detachably fixed to the middle frame 120 via fastener 160, specifically: the bracket 140 is detachably fixed to the support plate 122 via fastener 160. The fastener 160 is located around the waterproof sealing sleeve 150, and the circuit board 130 is disposed in the through hole 134 through which the fastener 160 passes.

[0087] Continue to refer to Figure 3Insert the waterproof sealing sleeve 150 onto the circuit board 130 with the USB interface 170; place the waterproof sealing sleeve 150 with the USB interface 170 and the circuit board 130 onto the middle frame 120; place the bracket 140 onto the circuit board 130 and the waterproof sealing sleeve 150, and fix the bracket 140 and the middle frame 120 to press the waterproof sealing sleeve 150 tight, thus completing the installation of the waterproof sealing sleeve 150.

[0088] After the waterproof sealing sleeve 150 is installed, it is inserted into the circuit board 130 and surrounds the USB interface 170. The waterproof sealing sleeve 150 and the two surfaces (first surface 131 and second surface 132) of the circuit board 130 are sealed together, and the waterproof sealing sleeve 150 and the middle frame 120 are sealed together.

[0089] In this embodiment, the waterproof sealing sleeve 150 includes a first sealing part 151, a second sealing part 152, and a third sealing part 153, all of which are capable of absorbing water and expanding.

[0090] The third sealing part 153 and the second sealing part 152 are arranged side by side and are both sealed to the first sealing part 151. To simplify the structure, the third sealing part 153 and the second sealing part 152 are located on the same side of the first sealing part 151.

[0091] The first sealing part 151 is used to be disposed on the periphery of the socket 124, and the first sealing part 151 is used to seal and connect with the middle frame 120; the second sealing part 152 is used to seal and connect between the first plate surface 131 of the circuit board 130 and the middle frame 120 (support plate 122), and surround the USB interface 170; the third sealing part 153 is used to seal and connect with the second plate surface 132 of the circuit board 130, and the third sealing part 130 is used to cover the projection of the USB interface 170 in the second plate surface 132.

[0092] In the waterproof sealing sleeve 150, both the first sealing part 151 and the second sealing part 152 are sealed to the middle frame 120. Specifically, the first sealing part 151 is sealed to the edge 121 of the middle frame 120, and the second sealing part 152 is sealed to the support plate 122 of the middle frame 120. Before installing the waterproof sealing sleeve 150, the circuit board 130 has a USB interface 170. To facilitate the installation of the waterproof sealing sleeve 150, the first sealing part 151 has a first opening (not shown in the figure) to accommodate the USB interface 170, located around the socket 124; the second sealing part 152 has a second opening (not shown in the figure) to accommodate the USB interface 170. The first and second openings communicate to form a circumferentially closed through hole 154. During the installation of the waterproof sealing sleeve 150, the USB interface 170 enters the through hole 154, facilitating the assembly of the waterproof sealing sleeve 150 onto the circuit board 130; simultaneously, the circumferential closure of the through hole 154 ensures the sealing effect of the waterproof sealing sleeve 150.

[0093] In this embodiment of the application, the waterproof sealing sleeve 150 includes: a first sealing part 151, a second sealing part 152 and a third sealing part 153; wherein, the third sealing part 153 and the second sealing part 152 are arranged side by side and are both connected to the first sealing part 151, and the third sealing part 153 and the second sealing part 152 are located on the same side of the first sealing part 151.

[0094] Both the first sealing part 151 and the second sealing part 152 are sealed to the middle frame 120. The first sealing part 151 is sealed to the edge 121 of the middle frame 120. The first sealing part 151 has a first opening (not shown in the figure) to accommodate the USB interface 170, and the first opening is opposite to and communicates with the socket 124. The second sealing part 152 is sealed to the support plate 122 of the middle frame 120. The second sealing part 152 has a second opening (not shown in the figure) to accommodate the USB interface 170, and the first opening and the second opening communicate. It should be noted that the first opening and the second opening communicate to form a closed annular through hole 154.

[0095] The specific structure for the sealing connection between the waterproof sealing sleeve 150 and the middle frame 120 is selected based on the actual situation. To improve the sealing effect, the waterproof sealing sleeve 150 and the middle frame 120 are sealed together using a labyrinth sealing structure.

[0096] In some embodiments, one of the waterproof sealing sleeve 150 and the middle frame 120 is provided with a first sealing rib 155, and the other is provided with a second sealing rib 126; the waterproof sealing sleeve 150 and the middle frame 120 are sealed together by the first sealing rib 155 and the second sealing rib 126. There are two first sealing ribs 155 and one second sealing rib 126, with the two first sealing ribs 155 forming a sealing groove 156 to accommodate the second sealing rib 126. This improves the sealing effect within the limited internal space of the electronic device 100 and also avoids the waterproof sealing sleeve 150 from becoming too large.

[0097] In practice, there can be three or more first sealing ribs 155 (including three), and two adjacent first sealing ribs 155 form a sealing groove 156 to accommodate the second sealing rib 126; the number of second sealing ribs 126 is less than the number of first sealing ribs 155, and the difference between the number of first sealing ribs 155 and the number of second sealing ribs 126 is one.

[0098] Figure 4 and Figure 5 The structure of the waterproof sealing sleeve 150 is shown. (See diagram.) Figure 4 and Figure 5 As shown, to facilitate the processing of the waterproof sealing sleeve 150 and the middle frame 120, the first sealing rib 155 can be provided on the first sealing part 151 and the second sealing part 152 of the waterproof sealing sleeve 150. It should be noted that the first sealing rib 155 is located on the periphery of the through hole 154.

[0099] Figure 6 The structure of the middle frame 120 is shown. (See diagram.) Figure 6 As shown, the second sealing rib 126 can be disposed on the support plate 122 and the side frame 121 of the middle frame 120. The second sealing rib 126 is located on the periphery of the mounting groove 125; the second sealing rib 126 is an annular structure with an opening. In practice, the second sealing rib 126 can also be a closed annular structure.

[0100] As mentioned above, the bracket 140 is detachably fixed to the middle frame 120 via fasteners 160. The middle frame 120 is provided with a threaded hole 123 that engages with the fasteners 160. The threaded hole 123 is also located on the support plate 122. Since the support plate 122 is relatively thin, a first boss 127 is provided on the support plate 122 to improve stability. The threaded hole 123 passes through the first boss 127 and the support plate 122.

[0101] In the sealing structure of the waterproof sealing sleeve 150 and the middle frame 120, the first sealing rib 155 and the second sealing rib 126 extend the flow path of water, which can delay the entry of water into the internal space of the electronic device 100, improve the sealing effect, and reduce the risk of water damaging components such as the circuit board 130.

[0102] In the above-mentioned sealing structure, the first sealing rib 155 and the second sealing rib 126 limit each other. During the assembly of the waterproof sealing sleeve 150, the probability of the first sealing rib 155 and the second sealing rib 126 turning over can be reduced, thereby improving the sealing reliability of the waterproof sealing sleeve 150.

[0103] In the above sealing structure, the first sealing rib 155 and the second sealing rib 126 interfere with each other. The amount of interference between them is selected according to the actual situation. To effectively improve the sealing effect, the interference between the first sealing rib 155 and the second sealing rib 126 can be 50%-70%. This can be understood as: after the first sealing rib 155 and the second sealing rib 126 interfere with each other, the compression of the first sealing rib 155 is 50%-70%, or the compression of the second sealing rib 126 is 50%-70%. Of course, the interference between the first sealing rib 155 and the second sealing rib 126 can also be other values, and is not limited to the above description.

[0104] It should be noted that the above-mentioned interference amount refers to the interference amount between the first sealing rib 155 and the second sealing rib 126 when the waterproof sealing sleeve 150 is not absorbing water.

[0105] In the above-mentioned sealing structure, the first sealing rib 155 and the second sealing rib 126 increase the contact area between the waterproof sealing sleeve 150 and the middle frame 120, thereby increasing the force between the waterproof sealing sleeve 150 and the middle frame 120 and improving the sealing effect and sealing reliability between the waterproof sealing sleeve 150 and the middle frame 120.

[0106] In some other embodiments, the number of first sealing ribs 155 and second sealing ribs 126 may also be equal.

[0107] In other embodiments, it is also possible to select that one of the waterproof sealing sleeve 150 and the middle frame 120 is provided with a first sealing rib 155 and the other is not provided with a second sealing rib 126, or the other is partially provided with a second sealing rib 126 and partially not provided with a second sealing rib 126.

[0108] In practice, the waterproof sealing sleeve 150 and the middle frame 120 may also adopt other labyrinth sealing structures or other sealing structures besides labyrinth sealing structures. This application embodiment does not limit this.

[0109] The middle frame 120 includes a metal part and a plastic part. In order to improve the sealing connection between the middle frame 120 and the waterproof sealing sleeve 150, the plastic part of the middle frame 120 is sealed to the waterproof sealing sleeve 150. In this way, the step difference and joint seam (the joint seam between the metal part and the plastic part) of the middle frame 120 are avoided from affecting the sealing effect.

[0110] See also Figure 3To facilitate the assembly of the waterproof sealing sleeve 150 and the circuit board 130, a gap is provided between the third sealing part 153 and the second sealing part 152 in the waterproof sealing sleeve 150, so that the waterproof sealing sleeve 150 can be inserted into the circuit board 130. To improve the sealing effect of the waterproof sealing sleeve 150, the gap between the third sealing part 153 and the second sealing part 152 is not greater than the thickness of the circuit board 130 (the distance between the first board surface 131 and the second board surface 132).

[0111] The specific structure for the sealing connection between the waterproof sealing sleeve 150 and the circuit board 130 is selected according to the actual situation. Considering the characteristics of the circuit board 130 itself, the third sealing part 153 and the second sealing part 152 clamp the circuit board 130 to achieve a sealing connection between the third sealing part 153 and the second sealing part 152 and the circuit board 130.

[0112] Considering the characteristics of the circuit board 130 itself, the surfaces of the third sealing part 153 and the second sealing part 152 that are sealed to the circuit board 130 can both be flat. Of course, while ensuring a sealed connection between the waterproof sealing sleeve 150 and the circuit board 130, the surface of the waterproof sealing sleeve 150 that is sealed to the circuit board 130 can also be curved.

[0113] The following section describes the connection structure between the USB interface 170 and the circuit board 130 to illustrate the sealing structure between the waterproof sealing sleeve 150 and the circuit board 130.

[0114] Figure 7 A connection diagram of the USB interface and the circuit board is shown. Figure 7 As shown, the USB interface 170 includes a USB interface body 171 and pins 172. One end of pin 172 is electrically connected to the USB interface body 171, and the other end of pin 172 is electrically connected to the circuit board 130. The USB interface body 171 and the USB connector are plugged in. The circuit board 130 is provided with mounting holes 133, and the pins 172 of the USB interface 170 are fixed in the mounting holes 133.

[0115] See also Figure 3 The third sealing part 153 covers the entire USB interface 170. This can be understood as the third sealing part 153 covering the USB interface body 171 and pins 172. Correspondingly, the third sealing part 153 also covers the mounting hole 133, so that the periphery of the third sealing part 153 surrounds the mounting hole 133. To improve sealing performance, the second sealing part 152 is located around the USB interface body 171, and the second sealing part 152 covers the pins 172 of the USB interface 170. This can be understood as the periphery of the second sealing part 152 surrounding the pins 172 of the USB interface 170. This prevents water from flowing from the pins 172 to the first board surface 131, improving both sealing and waterproofing performance.

[0116] In this embodiment, the third sealing part 153 can also be sealed to the bracket 140. Thus, in the event of a failure in the sealing connection between the third sealing part 153 and the second plate surface 132, the third sealing part 153 can prevent water from continuing to enter through the gap between the third sealing part 153 and the bracket 140, further improving the sealing and waterproofing effects.

[0117] The specific structure for the sealing connection between the third sealing part 153 and the bracket 140 should be selected based on the actual situation. To improve the sealing effect, the third sealing part 153 and the bracket 140 can be connected by a labyrinth seal structure.

[0118] In some embodiments, the third sealing portion 153 is provided with a third sealing rib 158, and the third sealing portion 153 is sealed to the bracket 140 through the third sealing rib 158. There are two third sealing ribs 158, with one third sealing rib 158 located around the periphery of the other. In practice, there may also be one or more (including three) third sealing ribs 158. When there are three or more third sealing ribs 158, one of two adjacent third sealing ribs 158 is located around the periphery of the other. Due to the limited internal space of the electronic device 100, it is preferable to have two third sealing ribs 158.

[0119] It should be noted that, Figure 4 The third sealing rib 158 shown is an open annular structure, such as a U-shape. In practice, the third sealing rib 158 can also be a closed annular structure.

[0120] In the above-mentioned sealing structure, the third sealing rib 158 extends the flow path of water, which can delay the entry of water into the internal space of the electronic device 100, improve the sealing effect, and reduce the risk of water damaging the internal components of the electronic device 100.

[0121] In the above sealing structure, the third sealing rib 158 and the bracket 140 interfere with each other. The amount of interference between them is selected according to the actual situation. To effectively improve the sealing effect, the interference between the third sealing rib 158 and the bracket 140 can be 50%-70%. This can be understood as: after the interference between the third sealing rib 158 and the bracket 140, the compression of the third sealing rib 158 is 50%-70%. Of course, the interference between the third sealing rib 158 and the bracket 140 can also be other values, and is not limited to the above description.

[0122] It should be noted that the above-mentioned interference amount refers to the interference amount between the first sealing rib 155 and the second sealing rib 126 when the waterproof sealing sleeve 150 is not absorbing water.

[0123] In the above-mentioned sealing structure, due to the interference fit between the third sealing rib 158 and the bracket 140, the clamping force of the bracket 140 on the waterproof sealing sleeve 150 can be increased, which further improves the sealing effect and sealing reliability of the waterproof sealing sleeve 150.

[0124] In some other embodiments, a fourth sealing rib (not shown in the figure) may be provided on the bracket 140. The fourth sealing rib is located between the two third sealing ribs 158, and the fourth sealing rib and the third sealing ribs 158 are sealed together.

[0125] In practice, the waterproof sealing sleeve 150 and the bracket 140 may also adopt other labyrinth sealing structures or other sealing structures besides labyrinth sealing structures. This application embodiment does not limit this.

[0126] In this embodiment, the third sealing portion 153 of the waterproof sealing sleeve 150 covers a portion of the circuit board 130. To facilitate the bracket 140 pressing the waterproof sealing sleeve 150, the bracket 140 may include a first bracket portion 141 and a second bracket portion 142. The first bracket portion 141 and the second bracket portion 142 are fixedly connected, and they can be an integral structure or a separate structure. The first bracket portion 141 can be understood as a manifestation of the first part of the pressing component, and the second bracket portion 142 can be understood as a manifestation of the second part of the pressing component.

[0127] The first part 141 and the second part 142 of the bracket have different thicknesses so that the first part 141 contacts the third sealing part 153 and the second part 142 contacts the circuit board 130. In this way, the bracket 140 can both press the circuit board 130 and the waterproof sealing sleeve 150, and also improve the reliability of the bracket 140 pressing the waterproof sealing sleeve 150.

[0128] The fasteners 160 are distributed on the first part 141 of the bracket, so that the bracket 140 can apply a large clamping force to the waterproof sealing sleeve 150, thereby improving the reliability of the bracket 140 clamping the waterproof sealing sleeve 150.

[0129] Figure 8 The structure of the bracket 140 is shown. (See diagram.) Figure 8 As shown, the first part 141 of the bracket is provided with a second boss 144, which contacts the circuit board 130, and the bracket fixing hole 143 passes through the first part 141 and the second boss 144 of the bracket.

[0130] To increase the clamping force applied by the bracket 140 to the waterproof sealing sleeve 150 and further improve the reliability of the bracket 140 clamping the waterproof sealing sleeve 150, the first part 141 of the bracket 140 is provided with a protrusion 145. (Continue to see...) Figure 3The third sealing part 153 is provided with a recess 157, which accommodates the protrusion 145, and the recess 157 and the protrusion 145 abut against each other.

[0131] As mentioned above, the first sealing part 151 is sealed to the frame 121, and the second sealing part 152 is sealed to the support plate 122. In order to improve the sealing effect of the waterproof sealing sleeve 150 and the middle frame 120, the first sealing part 151 is pressed against the frame 121 by the bracket 140, and the second sealing part 152 is pressed against the support plate 122 by the bracket 140.

[0132] Figure 9 A schematic diagram of the assembly of bracket 140 and waterproof sealing sleeve 150 is shown. In some embodiments, the first sealing portion 151 has a first connecting surface 159 and a second connecting surface 1510 on the side near bracket 140, and the second connecting surface 1510 is closer to the third sealing portion 153 than the first connecting surface 159; bracket 140 has a first pressing surface 146 and a second pressing surface 147, and the second pressing surface 147 is closer to the third sealing portion 153 than the first pressing surface 146; the first pressing surface 146 and the first connecting surface 159 contact and abut each other, and the second pressing surface 147 and the second connecting surface 1510 contact and abut each other. The first pressing surface 146 and the first connecting surface 159 are both parallel to the axial direction of fastener 160, and the second pressing surface 147 and the second connecting surface 1510 are both inclined relative to the axial direction of fastener. The end where the second connecting surface 1510 connects to the first connecting surface 159 and the end where the second connecting surface 1510 connects to the third sealing portion 153 are closer to the frame 121. Thus, through the action of the second pressing surface 147 and the second connecting surface 1510, the bracket 140 can press the first sealing part 151 against the frame 121.

[0133] The second pressing surface 147 and the second connecting surface 1510 can both be curved surfaces. The first pressing surface 147 is recessed away from the first sealing part 151, and the second connecting surface 1510 protrudes towards the bracket 140. In this way, the bracket 140 can press the first sealing part 151 tightly against the frame 121.

[0134] In the above structure, the first pressing surface 146 and the first connecting surface 159 contact and abut against each other, thereby achieving mutual positioning of the bracket 140 and the waterproof sealing sleeve 150, which facilitates the assembly of the entire structure. In actual practice, the first pressing surface 146 and the first connecting surface 159 may not be provided, and the structure is not limited to the above embodiment.

[0135] In this embodiment, the waterproof sealing sleeve 150 may also be fixed to the middle frame 120 without the bracket 140. For example, the waterproof sealing sleeve 150 may be fixed to the middle frame 120 by means of adhesive bonding or the same method may be used to fix the waterproof sealing sleeve 150 to the circuit board 130.

[0136] The following is combined with Figures 10-13 A detailed explanation of the sealing principle of the waterproof sealing sleeve 150.

[0137] Figure 10 for Figure 2 Top view of the structure shown in Figure (2); Figure 11 for Figure 10 An enlarged view of the BB-directed sectional view; Figure 12 for Figure 2 The front view of the structure shown in Figure (2); Figure 13 for Figure 12 An enlarged view of the CC-direction sectional view. It should be noted that... Figures 10-13 Part of the middle frame 120 and part of the circuit board 130 are shown.

[0138] Figure 11 The cross-section shown is the first cross-section, which is parallel to the insertion direction of the USB connector and USB interface 170. (Combined with...) Figure 10 and Figure 11 Explain the seal in the first section.

[0139] like Figure 10 and Figure 11 As shown, water enters the gap between the upper part of the USB interface 170 and the middle frame 120 through the gap between the middle frame 120 and the waterproof sealing sleeve 150, reaching region a. At region a, the first sealing rib 155 of the waterproof sealing sleeve 150 and the middle frame 120 are sealed together, thus preventing water from further entering the electronic device. The water flows from left to right, with some reaching region b and the rest reaching region d. At region b, the third sealing part 153 of the waterproof sealing sleeve 150 and the second surface 132 of the circuit board 130 are sealed together, thus preventing further water from entering the electronic device. Water continues to enter the electronic device; assuming the seal at region b fails, the water continues to flow from left to right, then upwards to the gap between the waterproof sealing sleeve 150 and the bracket 140, and then from right to left to region c. At region c, the third sealing rib 158 of the waterproof sealing sleeve 150 and the bracket 140 are sealed together, thereby preventing the water from continuing to flow; at region d, the second sealing part 152 of the waterproof sealing sleeve 150 and the first plate surface 131 of the circuit board 130 are sealed together, thereby preventing the water from continuing to enter the electronic device.

[0140] Water enters the gap between the lower part of the USB interface 170 and the middle frame 120 through the gap between the middle frame 120 and the waterproof sealing sleeve 150, and reaches area e. The first sealing rib 155 of the waterproof sealing sleeve 150 and the middle frame 120 are sealed together, thereby preventing the water from continuing to flow.

[0141] Figure 13The cross-section shown is the second cross-section, which is perpendicular to the insertion direction of the USB connector and USB interface 170. (Combined) Figure 12 and Figure 13 Explain the seal in the second section.

[0142] like Figure 12 and Figure 13 As shown, water enters the USB interface 170 and circuit board 130 through the gap between the upper part of the USB interface 170 and the middle frame 120. Part of the water reaches the second surface 132 of the circuit board 130, where the third sealing part 153 of the waterproof sealing sleeve 150 seals against the second surface 132 of the circuit board 130, thus preventing further water flow. Another part of the water flows to the left and right sides along the first surface 131 of the circuit board 130 and flows to regions h and j respectively. At regions h and j, the second sealing part of the waterproof sealing sleeve 150... The first surface 131 of the circuit board 130 is sealed to the pin 172, thereby preventing water from continuing to flow; water reaches the second surface 132 of the circuit board 130 through the pin 172, and the third sealing part 153 of the waterproof sealing sleeve 150 is sealed to the second surface 132 of the circuit board 130, thereby preventing water from continuing to flow; water reaches the first surface 131 of the circuit board 130 through the pin 172, and the second sealing part 152 of the waterproof sealing sleeve 150 is sealed to the first surface 131 of the circuit board 130, thereby preventing water from continuing to flow.

[0143] In the event of a failure in the sealing connection between the third sealing part 153 of the waterproof sealing sleeve 150 and the second plate surface 132 of the circuit board 130, water will flow to areas f and g. At areas f and g, the third sealing rib 158 of the waterproof sealing sleeve 150 and the bracket 140 are sealed together, thereby preventing the water from continuing to flow.

[0144] Water enters the USB interface 170 through the gap between the lower part of the USB interface 170 and the middle frame 120, and then flows to the left and right, reaching areas k and m. At areas k and m, the first sealing rib 155 of the waterproof sealing sleeve 150 and the middle frame 120 are sealed together, thereby preventing the water from continuing to flow.

[0145] Since the waterproof sealing sleeve 150 is a water-absorbing and expanding component, water flowing to the waterproof sealing sleeve 150 is absorbed by the waterproof sealing sleeve 150. After absorbing water, the waterproof sealing sleeve 150 expands, further improving the sealing effect at areas a, b, c, d, e, f, g, h, j, k, and m, thereby improving the waterproof effect.

[0146] As can be seen from the above sealing principle, after water enters the electronic device 100 through the USB interface 170, the waterproof sealing sleeve 150 prevents the water from entering further. Moreover, the waterproof sealing sleeve 150 absorbs water and expands, improving its sealing effect. Because the waterproof sealing sleeve 150 absorbs water and expands, the expanded waterproof sealing sleeve 150 can fill the tiny gaps between the waterproof sealing sleeve and the components sealed to it, improving the sealing effect of the waterproof sealing sleeve 150. It also improves the sealing consistency of different waterproof sealing sleeves 150, thereby improving the sealing consistency of different electronic devices 100. Correspondingly, it improves the waterproof consistency of different waterproof sealing sleeves 150 and the waterproof consistency of different electronic devices 100.

[0147] As can be seen from the above sealing principle, the waterproof sealing sleeve 150 absorbs water and expands, which improves the sealing effect, waterproof effect and waterproof rating of the waterproof sealing sleeve 150. For example, the waterproof rating of the waterproof sealing sleeve 150 can reach IPX4 and above.

[0148] The waterproof sealing sleeve 150 can be an injection molded or molded part. By changing the material and adding sealing ribs, there is no increase in cost compared to existing rubber sleeves, or the increase in cost is so small as to be negligible. It can achieve a low-cost and high waterproof rating seal.

[0149] Figure 14 A schematic diagram showing the connection of the mid-frame 120, waterproof sealing sleeve 150, and circuit board 130 of the electronic device provided in the embodiments of this application.

[0150] like Figure 14 As shown, the waterproof sealing sleeve 150 expands and increases in volume after absorbing water, making it more prone to interference with the electronic components 135 surrounding it. To solve this problem, a clearance gap δ is provided between the waterproof sealing sleeve 150 and the electronic components 135 surrounding it, and this clearance gap δ is not less than 0.6 mm. This clearance gap δ provides space for the waterproof sealing sleeve 150 to expand due to water absorption, thereby preventing interference between the waterproof sealing sleeve 150 and the surrounding electronic components 135.

[0151] The following details the material of the waterproof sealing sleeve 150.

[0152] The waterproof sealing sleeve 150 is made of water-absorbing and swellable rubber.

[0153] In this embodiment, the water-absorbing and swelling rubber material is made from raw materials comprising the following components in parts by weight:

[0154] 100 parts rubber matrix material, 25-35 parts water-absorbing and swelling resin, 20-35 parts reinforcing agent, 3-7 parts vulcanizing agent, 1-3 parts accelerator, 1-3 parts activator, and 1-4 parts anti-aging agent.

[0155] The rubber matrix material is EPDM rubber, and the particle size of the water-absorbing and swelling resin is 150-300 mesh.

[0156] In this embodiment, EPDM rubber is used as the rubber matrix material. EPDM rubber is combined with water-absorbing and swelling resin, reinforcing agent, vulcanizing agent, accelerator, activator, and anti-aging agent in a certain proportion to prepare a water-absorbing and swelling rubber material. This material combines the aging resistance of EPDM rubber with the water-absorbing and swelling properties of the water-absorbing and swelling resin. Moreover, the particle size of the water-absorbing and swelling resin is 150-300 mesh, giving the water-absorbing and swelling rubber material a certain volume expansion plasticity, maximum volume expansion rate, and mechanical properties, meeting the requirements of the waterproof sealing sleeve 150.

[0157] In the raw materials of water-absorbing and swelling rubber materials, based on 100 parts of rubber matrix material, the preferred amount of water-absorbing and swelling resin is 30-35 parts. Specifically, the amount of water-absorbing and swelling resin can be 30 parts, 31 parts, 32 parts, or 35 parts.

[0158] In the raw materials of water-absorbing and swelling rubber materials, the particle size of the water-absorbing and swelling resin is preferably 150-250 mesh. Specifically, the particle size of the water-absorbing and swelling resin can be 150 mesh, 200 mesh, or 250 mesh.

[0159] The raw materials for water-absorbing and swelling rubber materials include acrylate resins, polyvinyl alcohols, or polyacrylamides. Specifically, acrylate resins can be sodium polyacrylate, as sodium polyacrylate has strong water absorption properties.

[0160] In some embodiments, the water-absorbing and swelling resin is sodium polyacrylate, the amount of water-absorbing and swelling resin is preferably 30-35 parts, and the particle size of the water-absorbing and swelling resin is preferably 150-250; wherein, the amount of water-absorbing and swelling resin can be 30 parts, and the particle size of the water-absorbing and swelling resin can be 200 mesh.

[0161] In the raw materials of water-absorbing and swelling rubber materials, based on 100 parts of rubber matrix material, the amount of reinforcing agent is preferably 20-30 parts. Specifically, the amount of rubber matrix material can be 20 parts, 25 parts, or 30 parts.

[0162] In the raw materials of water-absorbing and swelling rubber materials, reinforcing agents may include non-conductive reinforcing agents, which improve the insulation of the waterproof sealing sleeve material, increase the impedance of the waterproof sealing sleeve material, and reduce the impact on the antenna performance of electronic device 100. The type of non-conductive reinforcing agent is selected according to the actual situation, and this application embodiment does not limit this. Of course, reinforcing agents may also include conductive reinforcing agents. For example, conductive reinforcing agents may include at least one of carbon black, silica, carbon nanotubes, and zinc oxide.

[0163] In some embodiments, the reinforcing agent is carbon black, and the amount of reinforcing agent used is preferably 20-25 parts. Specifically, the amount of reinforcing agent used can be 20 parts.

[0164] In some other embodiments, the reinforcing agent is a non-conductive reinforcing agent, and the amount of the reinforcing agent is preferably 25-30 parts. Specifically, the amount of the reinforcing agent can be 25 parts.

[0165] In the raw materials of water-absorbing and swelling rubber materials, based on 100 parts of rubber matrix material, the amount of vulcanizing agent is preferably 3-5 parts. Specifically, the amount of vulcanizing agent can be 4 parts.

[0166] In the raw materials of water-absorbing and swelling rubber materials, the vulcanizing agent includes sulfur or sulfur monochloride. In some embodiments, the vulcanizing agent is sulfur, and the amount of vulcanizing agent is preferably 3-5 parts. Specifically, the amount of vulcanizing agent can be 4 parts.

[0167] In the raw materials of water-absorbing and swelling rubber materials, the amount of accelerator is preferably 1 part, based on 100 parts of rubber matrix material.

[0168] The raw materials of water-absorbing and swelling rubber materials may include at least one of accelerator TMTD and zinc oxide, wherein the molecular formula of accelerator TMTD is C6H12N2S4.

[0169] In some embodiments, the accelerator includes accelerator TMTD and zinc oxide, wherein the amount of accelerator TMTD is preferably 0.5-1 part, and the amount of zinc oxide is preferably 0.5-1 part. Specifically, the amount of accelerator TMTD can be 0.5 parts, and the amount of zinc oxide can be 0.5 parts.

[0170] In the raw materials of water-absorbing and swelling rubber materials, based on 100 parts of rubber matrix material, the amount of activator is preferably 1.5-2.5 parts. Specifically, the amount of activator can be 2 parts.

[0171] In the raw materials of water-absorbing and swelling rubber materials, the activator includes at least one of octadecanoic acid and zinc oxide. Octadecanoic acid can also be called SA (stearic acid).

[0172] In some embodiments, the activator is octadecanoic acid and zinc oxide, wherein the amount of octadecanoic acid can be 1 part and the amount of zinc oxide can be 1 part.

[0173] In the raw materials of water-absorbing and swelling rubber materials, the amount of anti-aging agent can be 1 part, 2 parts, or 4 parts, based on 100 parts of rubber matrix material.

[0174] In the raw materials of water-absorbing and swelling rubber materials, anti-aging agents may include at least one of anti-aging agent 4020 and anti-aging agent 4010. Anti-aging agent 4020, also known as anti-aging agent DMBPPD, belongs to the p-phenylenediamine class of rubber anti-aging agents; anti-aging agent 4010, also known as anti-aging agent CPPD, belongs to the p-phenylenediamine class of rubber anti-aging agents. Anti-aging agent 4010 can be understood as a type of antioxidant, and antioxidants can be understood as a type of anti-aging agent.

[0175] In some embodiments, the anti-aging agent includes anti-aging agent 4020 and anti-aging agent 4010, wherein the amount of anti-aging agent 4020 is 1 part and the amount of anti-aging agent 4010 is 1 part.

[0176] In this embodiment, the method for preparing the waterproof sealing sleeve 150 using the aforementioned water-absorbing and swelling rubber material includes:

[0177] S1. Plasticize the rubber matrix material and reinforcing agent to obtain plasticized rubber;

[0178] S2. Mix the plasticized rubber, water-absorbing and swelling resin, vulcanizing agent, accelerator, activator and anti-aging agent to obtain the compounded rubber;

[0179] S3. Calender the rubber compound and extrude it to obtain a semi-finished product;

[0180] S4. The semi-finished product is molded and vulcanized to obtain the finished product, which is a waterproof sealing sleeve 150.

[0181] In step S1 above, plasticizing can be carried out on a two-roll mill. The process parameters for plasticizing are selected according to the actual situation. For example, the preferred plasticizing temperature is 45-55℃, specifically 50℃. The preferred plasticizing time is 15-20 minutes, specifically 20 minutes.

[0182] In step S2 above, mixing can be performed on a two-roll mill. In some embodiments, plasticizing and mixing are performed on the same two-roll mill. After step S1 is completed, the plasticized rubber, water-absorbing and swelling resin, vulcanizing agent, accelerator, activator, and anti-aging agent are added in proportion in the two-roll mill for mixing. The mixing temperature is preferably 45-55°C, and specifically, it can be 450°C. The mixing time is preferably 15-25 minutes, and specifically, it can be 15 minutes or 20 minutes. The process parameters in the mixing are selected according to the actual situation, as long as the mixing is uniform.

[0183] In S3 above, calendering can be performed in a calender. In some embodiments, the compound is added to the calender for calendering. The thickness of the semi-finished product is 1.3-1.5 times the thickness of the finished product (waterproof sealing sleeve 150), wherein the thickness of the semi-finished product is the maximum thickness of the finished product, and the thickness of the finished product is the maximum thickness of the finished product.

[0184] In step S4 above, compression molding vulcanization can be performed in a vulcanizing machine. In some embodiments, the semi-finished product is added to the vulcanizing machine for compression molding vulcanization. The compression molding vulcanization temperature is preferably 170-185°C, and specifically 180°C. The compression molding vulcanization time is preferably 4-5 minutes, and specifically 4.5 minutes. After the above compression molding vulcanization, a waterproof sealing sleeve 150 is obtained.

[0185] In this embodiment, the rubber matrix material and reinforcing agent are plasticized to obtain a plasticized rubber; the plasticized rubber is then mixed with a water-absorbing and swelling resin, a vulcanizing agent, an accelerator, an activator, and an anti-aging agent in a certain proportion to obtain a compound; the compound is calendered and extruded to obtain a semi-finished product; the semi-finished product is then molded and vulcanized to obtain a waterproof sealing sleeve 150. This allows the waterproof sealing sleeve 150 to possess both the aging resistance of EPDM rubber and the water-absorbing and swelling properties of the water-absorbing and swelling resin, giving the waterproof sealing sleeve 150 a certain volume expansion rate, maximum volume expansion rate, and mechanical properties to meet usage requirements.

[0186] The performance of the waterproof sealing sleeve 150 prepared by the above method was tested, and the results are shown in Table 1.

[0187] Table 1 Performance of Waterproof Sealing Gloves

[0188]

[0189] It should be noted that sample 1 refers to the sample taken from the prepared waterproof sealing sleeve 150.

[0190] The existing silicone rubber was subjected to performance testing. The hardness of the existing silicone rubber is 65A. The results are shown in Table 2.

[0191] Table 2 Properties of Existing Silicone Rubber (Hardness 65A)

[0192]

[0193] It should be noted that sample 2 refers to a sample made using existing silicone rubber.

[0194] By comparing the data in Tables 1 and 2, it can be seen that in this embodiment, the mechanical properties of the waterproof sealing sleeve 150 are not much different from those of existing silicone rubber, which can meet the usage requirements. At the same time, the waterproof sealing sleeve 150 has good water absorption, the volume expansion rate of the waterproof sealing sleeve 150 is not less than 10% / 5min, and the maximum volume expansion rate of the waterproof sealing sleeve 150 is not greater than 50%. It can absorb water quickly, and also ensure that the maximum volume of the waterproof sealing sleeve 150 after absorbing water is not too large.

[0195] The above-mentioned volume expansion rate can be tested according to GB / T 18173.3-2014; the above-mentioned maximum volume expansion rate can be tested according to GB / T 18173.3-2014; the above-mentioned tensile strength can be tested according to ISO 37; the above-mentioned elongation at break can be tested according to ISO 37; the above-mentioned compressive settling can be tested according to ISO 815, with an ambient temperature of 25℃ and a compression time of 72h; the above-mentioned tear resistance can be tested according to ISO 34-1, and a right-angled specimen can be used for testing.

[0196] It should be noted that 10% / 5min can be understood as: during the water absorption process, the volume expansion of the waterproof sealing sleeve material is 10% of the initial volume of the waterproof sealing sleeve 150 every 5 minutes. The initial volume of the waterproof sealing sleeve 150 refers to the volume of the waterproof sealing sleeve 150 in its unabsorbed state.

[0197] In this embodiment, the waterproof sealing sleeve 150 must meet basic mechanical performance requirements to prevent risks such as tearing and folding during assembly, which could lead to poor protection. It also needs good resistance to permanent compression deformation to ensure the material maintains good waterproof performance during long-term use. The volume expansion rate of the waterproof sealing sleeve 150 is not less than 10% / 5min, allowing it to expand instantly upon contact with water, preventing further water intrusion into the interior of the electronic device 100 and improving the waterproof effect and waterproof rating. The maximum volume expansion rate of the waterproof sealing sleeve 150 is not greater than 50%, effectively controlling the maximum volume of the waterproof sealing sleeve 150 after water absorption and expansion. This ensures that the internal space of the electronic device 100 can accommodate the expanded waterproof sealing sleeve 150, avoiding increasing the volume of the electronic device 100 and preventing the bottom shell of the electronic device 100 from detaching.

[0198] To further understand this application, preferred embodiments of this application are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this application, and not for limiting this application.

[0199] Example 1

[0200] 1. Raw materials:

[0201] Rubber matrix material: 100 parts of EPDM rubber;

[0202] Other raw materials: based on 100 parts by weight of EPDM rubber, sodium polyacrylate 30 parts, carbon black 25 parts, sulfur 4 parts, accelerator TT 0.5 parts, zinc oxide 0.5 parts, octadecanoic acid 2 parts, anti-aging agent 4020 1 part, and anti-aging agent 4010 1 part.

[0203] 2. Preparation:

[0204] S1. Add EPDM rubber and carbon black to a two-roll mill for plasticizing. The plasticizing temperature is 50℃ and the plasticizing time is 20min to obtain plasticized rubber.

[0205] S2. Add the plasticized rubber, sodium polyacrylate, sulfur, accelerator TT, zinc oxide, octadecanoic acid, anti-aging agent 4020, and anti-aging agent 4010 to a two-roll mill in proportion and mix them. The mixing temperature is 60℃ and the mixing time is 20min to obtain the mixed rubber.

[0206] S3. Calender the rubber compound in a calender and extrude it to obtain a semi-finished product;

[0207] S4. The semi-finished product is subjected to compression vulcanization in a vulcanizing machine at a temperature of 180°C for 4.5 minutes to obtain a waterproof sealing sleeve 150. The structure of the waterproof sealing sleeve 150 is as described above.

[0208] 3. Performance Testing:

[0209] Sample 3 was removed from the waterproof sealing sleeve 150 and its performance was tested. The results are shown in Table 3.

[0210] Table 3 Performance of Waterproof Sealing Sleeves

[0211]

[0212] Example 2

[0213] 1. Raw materials:

[0214] Rubber matrix material: 100 parts of EPDM rubber;

[0215] Other raw materials: based on 100 parts by weight of EPDM rubber, sodium polyacrylate 25 parts, carbon black 20 parts, sulfur 3 parts, accelerator TT 1 part, zinc oxide 1 part, octadecanoic acid 1 part, anti-aging agent 4020 0.5 parts, and anti-aging agent 4010 0.5 parts.

[0216] 2. Preparation:

[0217] S1. Add EPDM rubber and carbon black to a two-roll mill for plasticizing. The plasticizing temperature is 50℃ and the plasticizing time is 20min to obtain plasticized rubber.

[0218] S2. Add the plasticized rubber, sodium polyacrylate, sulfur, accelerator TT, zinc oxide, octadecanoic acid, anti-aging agent 4020, and anti-aging agent 4010 to a two-roll mill in proportion and mix them. The mixing temperature is 60℃ and the mixing time is 20min to obtain the mixed rubber.

[0219] S3. Calender the rubber compound in a calender and extrude it to obtain a semi-finished product;

[0220] S4. The semi-finished product is subjected to compression vulcanization in a vulcanizing machine at a temperature of 175°C for 4 minutes to obtain a waterproof sealing sleeve 150. The structure of the waterproof sealing sleeve 150 is as described above.

[0221] 3. Performance Testing:

[0222] Sample 4 was removed from the waterproof sealing sleeve 150 and its performance was tested. The results are shown in Table 4.

[0223] Table 4 Performance of Waterproof Sealing Sleeves

[0224]

[0225] Example 3

[0226] 1. Raw materials:

[0227] Rubber matrix material: 100 parts of EPDM rubber;

[0228] Other raw materials: Based on 100 parts by weight of EPDM rubber, sodium polyacrylate 35 parts, carbon black 35 parts, sulfur 7 parts, accelerator TT 2 parts, zinc oxide 1 part, octadecanoic acid 3 parts, anti-aging agent 4020 2 parts, and anti-aging agent 4010 2 parts.

[0229] 2. Preparation:

[0230] S1. Add EPDM rubber and carbon black to a two-roll mill for plasticizing. The plasticizing temperature is 50℃ and the plasticizing time is 20min to obtain plasticized rubber.

[0231] S2. Add the plasticized rubber, sodium polyacrylate, sulfur, accelerator TT, zinc oxide, octadecanoic acid, anti-aging agent 4020, and anti-aging agent 4010 to a two-roll mill in proportion and mix them. The mixing temperature is 60℃ and the mixing time is 20min to obtain the mixed rubber.

[0232] S3. Calender the rubber compound in a calender and extrude it to obtain a semi-finished product;

[0233] S4. The semi-finished product is subjected to compression vulcanization in a vulcanizing machine at a temperature of 185°C for 5 minutes to obtain a waterproof sealing sleeve 150. The structure of the waterproof sealing sleeve 150 is as described above.

[0234] 3. Performance Testing:

[0235] Sample 5 was removed from the waterproof sealing sleeve 150 and its performance was tested. The results are shown in Table 5.

[0236] Table 5 Performance of Waterproof Sealing Sleeves

[0237]

[0238] In this embodiment of the application, the water-absorbing and swelling rubber material is also prepared from raw materials comprising the following components in parts by weight:

[0239] The main adhesive component is 100 parts, water-absorbing and swelling resin is 15-25 parts, reinforcing agent is 20-35 parts, vulcanizing agent is 3-5 parts, accelerator is 1-4 parts, activator is 2-4 parts, and anti-aging agent is 1-4 parts.

[0240] The main adhesive component is prepared from raw materials comprising the following components in parts by weight:

[0241] 70-80 parts of rubber matrix material, 20-30 parts of polar rubber;

[0242] The rubber matrix material is EPDM rubber, and the polar rubber includes polyurethane, nitrile rubber, or acrylate rubber.

[0243] In the raw materials of water-absorbing and swelling rubber materials, the particle size of the water-absorbing and swelling resin is 150-300 mesh.

[0244] In this embodiment, EPDM rubber is used as the rubber matrix material, and EPDM rubber and polar rubber are used as the main rubber components, which improves the hydrophilicity of the main rubber components. The main rubber components, water-absorbing and swelling resin, reinforcing agent, vulcanizing agent, accelerator, activator and anti-aging agent are combined in a certain proportion to prepare water-absorbing and swelling rubber material, which can combine the aging resistance of EPDM rubber, the hydrophilicity of polar rubber and the water absorption and swelling performance of water-absorbing and swelling resin. Moreover, the particle size of water-absorbing and swelling resin is 150 mesh-300 mesh, so that the water-absorbing and swelling rubber material has a certain volume expansion plasticity, maximum volume expansion rate and mechanical properties, which meets the requirements of waterproof sealing sleeve 150.

[0245] In the main rubber component, the amount of rubber matrix material is preferably 73-76 parts. Specifically, the amount of rubber matrix material can be 70 parts, 73 parts, or 76 parts. In the main rubber component, the amount of polar rubber is preferably 24-27 parts. Specifically, the amount of polar rubber can be 24 parts, 25 parts, or 27 parts.

[0246] In some embodiments, the polar rubber includes polyurethane, and the amount of polar rubber may be 25 parts, in which case the amount of rubber matrix material is 75 parts.

[0247] In the raw materials of water-absorbing and swelling rubber materials, based on a main rubber component dosage of 100 parts, the preferred dosage of water-absorbing and swelling resin is 20-25 parts. Specifically, the dosage of water-absorbing and swelling resin can be 20 parts, 22 parts, or 25 parts.

[0248] In the raw materials of water-absorbing and swelling rubber materials, the particle size of the water-absorbing and swelling resin is preferably 150-250 mesh. Specifically, the particle size of the water-absorbing and swelling resin can be 150 mesh, 200 mesh, or 250 mesh.

[0249] The raw materials for water-absorbing and swelling rubber materials include acrylate resins, polyvinyl alcohols, or polyacrylamides. Specifically, acrylate resins can be sodium polyacrylate, as sodium polyacrylate has strong water absorption properties.

[0250] In some embodiments, the water-absorbing and swelling resin is sodium polyacrylate, the amount of water-absorbing and swelling resin is preferably 30-35 parts, and the particle size of the water-absorbing and swelling resin is preferably 150-250; wherein, the amount of water-absorbing and swelling resin can be 30 parts, and the particle size of the water-absorbing and swelling resin can be 200 mesh.

[0251] In the raw materials of water-absorbing and swelling rubber materials, based on a main rubber component dosage of 100 parts, the preferred dosage of reinforcing agent is 20-30 parts. Specifically, the dosage of reinforcing agent can be 20 parts, 25 parts, or 30 parts.

[0252] In the raw materials of water-absorbing and swelling rubber materials, reinforcing agents may include non-conductive reinforcing agents, which improve the insulation of the waterproof sealing sleeve material, increase the impedance of the waterproof sealing sleeve material, and reduce the impact on the antenna performance of electronic device 100. The type of non-conductive reinforcing agent is selected according to the actual situation, and this application embodiment does not limit this. Of course, reinforcing agents may also include conductive reinforcing agents. For example, conductive reinforcing agents may include at least one of carbon black, silica, carbon nanotubes, and zinc oxide.

[0253] In some embodiments, the reinforcing agent is carbon black, and the amount of reinforcing agent used is preferably 20-25 parts. Specifically, the amount of reinforcing agent used can be 20 parts.

[0254] In some other embodiments, the reinforcing agent is a non-conductive reinforcing agent, and the amount of the reinforcing agent is preferably 25-30 parts. Specifically, the amount of the reinforcing agent can be 25 parts.

[0255] In the raw materials of water-absorbing and swelling rubber materials, based on a main rubber component dosage of 100 parts, the specific dosage of vulcanizing agent can be 4 parts.

[0256] In the raw materials of water-absorbing and swelling rubber materials, the vulcanizing agent includes sulfur or sulfur monochloride. In some embodiments, the vulcanizing agent is sulfur, and the amount of vulcanizing agent used can be 4 parts.

[0257] In the raw materials of water-absorbing and swelling rubber materials, based on a main rubber component dosage of 100 parts, the preferred dosage of accelerator is 2 parts.

[0258] The raw materials of water-absorbing and swelling rubber materials may include at least one of accelerator TMTD and zinc oxide, wherein the molecular formula of accelerator TMTD is C6H12N2S4.

[0259] In some embodiments, the accelerator includes accelerator TMTD and zinc oxide, wherein the amount of accelerator TMTD is preferably 0.5-2 parts, and the amount of zinc oxide is preferably 0.5-2 parts. However, the specific amount of accelerator TMTD can be 1 part, and the specific amount of zinc oxide can be 1 part.

[0260] In the raw materials of water-absorbing and swelling rubber materials, based on a main rubber component dosage of 100 parts, the activator dosage can specifically be 3 parts.

[0261] The activator in the raw materials of water-absorbing and swelling rubber materials includes at least one of octadecanoic acid and zinc oxide.

[0262] In some embodiments, the activator includes octadecanoic acid and zinc oxide, wherein the amount of octadecanoic acid is 1.5 parts and the amount of zinc oxide is 1.5 parts.

[0263] In the raw materials of water-absorbing and swelling rubber materials, the amount of the main rubber component is 100 parts, and the amount of the anti-aging agent can be 1 part, 2 parts, or 4 parts.

[0264] In the raw materials of water-absorbing and swelling rubber materials, anti-aging agents may include at least one of anti-aging agent 4020 and anti-aging agent 4010. Anti-aging agent 4020, also known as anti-aging agent DMBPPD, belongs to the p-phenylenediamine class of rubber anti-aging agents; anti-aging agent 4010, also known as anti-aging agent CPPD, belongs to the p-phenylenediamine class of rubber anti-aging agents. Anti-aging agent 4010 can be understood as a type of antioxidant, and antioxidants can be understood as a type of anti-aging agent.

[0265] In some embodiments, the anti-aging agent includes anti-aging agent 4020 and anti-aging agent 4010, wherein the amount of anti-aging agent 4020 is 1 part and the amount of anti-aging agent 4010 is 1 part.

[0266] In this embodiment, the method for preparing the waterproof sealing sleeve 150 using the aforementioned water-absorbing and swelling rubber material includes:

[0267] S1. Plasticize the rubber matrix material, polar rubber and reinforcing agent to obtain plasticized rubber;

[0268] S2. Mix the plasticized rubber, water-absorbing and swelling resin, vulcanizing agent, accelerator, activator and anti-aging agent to obtain the compounded rubber;

[0269] S3. Calender the rubber compound and extrude it to obtain a semi-finished product;

[0270] S4. The semi-finished product is molded and vulcanized to obtain the finished product, which is a waterproof sealing sleeve 150.

[0271] In step S1 above, plasticizing can be carried out on a two-roll mill. The process parameters for plasticizing are selected according to the actual situation. For example, the preferred plasticizing temperature is 45-55℃, specifically 50℃. The preferred plasticizing time is 15-20 minutes, specifically 20 minutes.

[0272] In step S2 above, mixing can be performed on a two-roll mill. In some embodiments, plasticizing and mixing are performed on the same two-roll mill. After step S1 is completed, the plasticized rubber, water-absorbing and swelling resin, vulcanizing agent, accelerator, activator, and anti-aging agent are added in proportion in the two-roll mill for mixing. The mixing temperature is preferably 45-55°C, and specifically, it can be 450°C. The mixing time is preferably 15-25 minutes, and specifically, it can be 15 minutes or 20 minutes. The process parameters in the mixing are selected according to the actual situation, as long as the mixing is uniform.

[0273] In S3 above, calendering can be performed in a calender. In some embodiments, the compound is added to the calender for calendering. The thickness of the semi-finished product is 1.3-1.5 times the thickness of the finished product (waterproof sealing sleeve 150), wherein the thickness of the semi-finished product is the maximum thickness of the finished product, and the thickness of the finished product is the maximum thickness of the finished product.

[0274] In step S4 above, compression molding vulcanization can be performed in a vulcanizing machine. In some embodiments, the semi-finished product is added to the vulcanizing machine for compression molding vulcanization. The compression molding vulcanization temperature is preferably 165-180°C, and specifically 170°C. The compression molding vulcanization time is preferably 5-10 minutes, and specifically 8 minutes. After the above compression molding vulcanization, a waterproof sealing sleeve 150 is obtained.

[0275] In this embodiment, a rubber matrix material, polar rubber, and reinforcing agent are plasticized to obtain a plasticized rubber. The plasticized rubber is then mixed with a water-absorbing and swelling resin, a vulcanizing agent, an accelerator, an activator, and an anti-aging agent in a certain proportion to obtain a compound. The compound is calendered and extruded to obtain a semi-finished product. The semi-finished product is then molded and vulcanized to obtain a waterproof sealing sleeve 150. This allows the waterproof sealing sleeve 150 to possess the aging resistance of EPDM rubber, the hydrophilicity of polar rubber, and the water-absorbing and swelling properties of the water-absorbing and swelling resin. Consequently, the waterproof sealing sleeve 150 exhibits a certain volume expansion rate, maximum volume expansion rate, and mechanical properties, meeting the application requirements.

[0276] The performance of the waterproof sealing sleeve 150 prepared by the above method was tested, and the results are shown in Table 6.

[0277] Table 6 Performance of Waterproof Sealing Sleeves

[0278]

[0279] It should be noted that sample 6 refers to the sample taken from the prepared waterproof sealing sleeve 150.

[0280] The testing standards for each parameter are detailed above and will not be repeated here.

[0281] In this embodiment, the waterproof sealing sleeve 150 must meet basic mechanical performance requirements to prevent risks such as tearing and folding during assembly, which could lead to poor protection. It also needs good resistance to permanent compression deformation to ensure the material maintains good waterproof performance during long-term use. The volume expansion rate of the waterproof sealing sleeve 150 is not less than 10% / 5min, allowing it to expand instantly upon contact with water, preventing further water intrusion into the interior of the electronic device 100 and improving the waterproof effect and waterproof rating. The maximum volume expansion rate of the waterproof sealing sleeve 150 is not greater than 50%, effectively controlling the maximum volume of the waterproof sealing sleeve 150 after water absorption and expansion. This ensures that the internal space of the electronic device 100 can accommodate the expanded waterproof sealing sleeve 150, avoiding increasing the volume of the electronic device 100 and preventing the bottom shell of the electronic device 100 from detaching.

[0282] To further understand this application, preferred embodiments of this application are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this application, and not for limiting this application.

[0283] Example 4

[0284] 1. Raw materials:

[0285] Main rubber components: 75 parts EPDM rubber, 25 parts polyurethane;

[0286] Other raw materials: Based on 100 parts by weight of the main rubber component, sodium polyacrylate 20 parts, carbon black 25 parts, sulfur 4 parts, accelerator TT 1 part, zinc oxide 1 part, octadecanoic acid 3 parts, anti-aging agent 4020 1 part, anti-aging agent 4010 1 part.

[0287] 2. Preparation:

[0288] S1. Add EPDM rubber, polyurethane and carbon black to a two-roll mill for plasticizing. The plasticizing temperature is 55℃ and the plasticizing time is 30min to obtain plasticized rubber.

[0289] S2. Add the plasticized rubber, sodium polyacrylate, sulfur, accelerator TT, zinc oxide, octadecanoic acid, anti-aging agent 4020, and anti-aging agent 4010 to a two-roll mill in proportion and mix them. The mixing temperature is 60℃ and the mixing time is 20min to obtain the mixed rubber.

[0290] S3. Calender the rubber compound in a calender and extrude it to obtain a semi-finished product;

[0291] S4. The semi-finished product is subjected to compression vulcanization in a vulcanizing machine at a temperature of 170°C for 8 minutes to obtain a waterproof sealing sleeve 150. The structure of the waterproof sealing sleeve 150 is as described above.

[0292] 3. Performance Testing

[0293] Sample 7 was removed from the waterproof sealing sleeve 150 and its performance was tested. The results are shown in Table 7.

[0294] Table 7 Performance of Waterproof Sealing Sleeves

[0295]

[0296] Example 5

[0297] 1. Raw materials:

[0298] Main rubber components: 80 parts EPDM rubber, 20 parts polyurethane;

[0299] Other raw materials: Based on 100 parts by weight of the main rubber component, sodium polyacrylate 25 parts, carbon black 20 parts, sulfur 3 parts, accelerator TT 0.5 parts, zinc oxide 0.5 parts, octadecanoic acid 2 parts, anti-aging agent 4020 0.5 parts, and anti-aging agent 4010 0.5 parts.

[0300] 2. Preparation:

[0301] S1. Add EPDM rubber, polyurethane and carbon black to a two-roll mill for plasticizing. The plasticizing temperature is 55℃ and the plasticizing time is 30min to obtain plasticized rubber.

[0302] S2. Add the plasticized rubber, sodium polyacrylate, sulfur, accelerator TT, zinc oxide, octadecanoic acid, anti-aging agent 4020, and anti-aging agent 4010 to a two-roll mill in proportion and mix them. The mixing temperature is 60℃ and the mixing time is 20min to obtain the mixed rubber.

[0303] S3. Calender the rubber compound in a calender and extrude it to obtain a semi-finished product;

[0304] S4. The semi-finished product is subjected to compression vulcanization in a vulcanizing machine at a temperature of 175°C for 8 minutes to obtain a waterproof sealing sleeve 150. The structure of the waterproof sealing sleeve 150 is as described above.

[0305] 3. Performance Testing

[0306] Sample 8 was removed from the waterproof sealing sleeve 150 and its performance was tested. The results are shown in Table 8.

[0307] Table 8 Performance of Waterproof Sealing Sleeves

[0308]

[0309] Example 6

[0310] 1. Raw materials:

[0311] Main rubber components: 70 parts EPDM rubber, 30 parts polyurethane;

[0312] Other raw materials: Based on 100 parts by weight of the main rubber component, sodium polyacrylate 15 parts, carbon black 30 parts, sulfur 5 parts, accelerator TT 2 parts, zinc oxide 2 parts, octadecanoic acid 4 parts, anti-aging agent 4020 2 parts, and anti-aging agent 4010 2 parts.

[0313] 2. Preparation:

[0314] S1. Add EPDM rubber, polyurethane and carbon black to a two-roll mill for plasticizing. The plasticizing temperature is 55℃ and the plasticizing time is 30min to obtain plasticized rubber.

[0315] S2. Add the plasticized rubber, sodium polyacrylate, sulfur, accelerator TT, zinc oxide, octadecanoic acid, anti-aging agent 4020, and anti-aging agent 4010 to a two-roll mill in proportion and mix them. The mixing temperature is 60℃ and the mixing time is 20min to obtain the mixed rubber.

[0316] S3. Calender the rubber compound in a calender and extrude it to obtain a semi-finished product;

[0317] S4. The semi-finished product is subjected to compression vulcanization in a vulcanizing machine at a temperature of 175°C for 15 minutes to obtain a waterproof sealing sleeve 150. The structure of the waterproof sealing sleeve 150 is as described above.

[0318] 3. Performance Testing

[0319] Sample 9 was removed from the waterproof sealing sleeve 150 and its performance was tested. The results are shown in Table 5.

[0320] Table 9 Performance of Waterproof Sealing Sleeves

[0321]

[0322] The water-absorbing and expanding rubber material provided in this application embodiment can be used not only to make waterproof sealing sleeves, but also to make other water-absorbing sealing components for static sealing scenarios where there are interface differences.

Claims

1. A waterproof sealing sleeve, characterized in that, The invention relates to an electronic device, which includes: a housing, a circuit board, and a USB interface connected to the circuit board. The housing has a socket, the USB interface is located at the socket, and the circuit board is located inside the housing. The waterproof sealing sleeve includes a first sealing part, a second sealing part, and a third sealing part, all of which are capable of absorbing water and expanding. The first sealing part is disposed around the insertion hole and is sealed to the housing; The second sealing part is sealed to the first sealing part, and the second sealing part is sealed between the first plate surface of the circuit board and the housing, and surrounds the USB interface; The third sealing part is sealed to the first sealing part, and the third sealing part is sealed to the second board surface of the circuit board and covers the projection of the USB interface in the second board surface. The first board surface and the second board surface are distributed opposite to each other. The volume expansion rate of the waterproof sealing sleeve is greater than or equal to 10% / 5min.

2. The waterproof sealing sleeve according to claim 1, characterized in that, The third sealing part and the second sealing part are arranged side by side and located on the same side of the first sealing part; there is a gap between the third sealing part and the second sealing part so that the waterproof sealing sleeve can be inserted into the circuit board.

3. The waterproof sealing sleeve according to claim 1, characterized in that, The first sealing part has a first opening to accommodate the USB interface, the first opening being located around the socket; the second sealing part has a second opening to accommodate the USB interface, the second opening communicating with the first opening and forming a circumferentially closed through hole.

4. The waterproof sealing sleeve according to claim 1, characterized in that, Both the first sealing part and the second sealing part are provided with a first sealing rib that can absorb water and expand. Both the first sealing part and the second sealing part are sealed to the shell through the first sealing rib.

5. The waterproof sealing sleeve according to claim 4, characterized in that, There are at least two first sealing ribs, and one of two adjacent first sealing ribs is located on the periphery of the other. The housing is provided with a second sealing rib; two adjacent first sealing ribs form a sealing groove, the sealing groove accommodates the second sealing rib, and the sealing groove and the second sealing rib are sealed together.

6. The waterproof sealing sleeve according to claim 1, characterized in that, The USB interface includes a USB interface body and pins. One end of the pins is connected to the USB interface body, and the other end of the pins is connected to the circuit board. The second sealing part is disposed on the periphery of the USB interface body and covers the pins.

7. The waterproof sealing sleeve according to claim 1, characterized in that, The electronic device further includes a clamping component located inside the housing, the circuit board located between the clamping component and the housing, and the clamping component and the housing being fixedly connected. The waterproof sealing sleeve is disposed between the clamping component and the housing, and the waterproof sealing sleeve is pressed by the clamping component onto the housing and the circuit board.

8. The waterproof sealing sleeve according to claim 7, characterized in that, The housing includes a middle frame, the middle frame includes a fixedly connected side frame and a support plate, the socket is located on the side frame, and the support plate is provided with a mounting groove to accommodate and limit the USB interface; The first sealing part is sealed to the frame, and the second sealing part is sealed to the support plate; The first sealing part is pressed against the frame by the pressing member, and the second sealing part is pressed against the support plate and the circuit board by the pressing member.

9. The waterproof sealing sleeve according to claim 7, characterized in that, The clamping component is a device support inside the housing.

10. The waterproof sealing sleeve according to claim 7, characterized in that, The third sealing part and the pressing component are connected in a sealed manner.

11. The waterproof sealing sleeve according to claim 10, characterized in that, The third sealing part is provided with a third sealing rib that can absorb water and expand, and the third sealing part is sealed and connected to the pressing component through the third sealing rib.

12. The waterproof sealing sleeve according to claim 11, characterized in that, There are at least two third sealing ribs, and one of the two adjacent third sealing ribs is located on the periphery of the other.

13. The waterproof sealing sleeve according to claim 7, characterized in that, The clamping component includes: a first clamping component portion and a second clamping component portion fixedly connected, wherein the first clamping component portion and the second clamping component portion have different thicknesses, the first clamping component portion is fixedly connected to the housing, and the second clamping component portion contacts the circuit board; the third sealing portion contacts the first clamping component portion; And / or, the pressing member is provided with a protrusion, the third sealing part is provided with a recess, the recess accommodates the protrusion, and the recess and the protrusion abut against each other.

14. The waterproof sealing sleeve according to claim 1, characterized in that, The housing includes a metal part and a plastic part, and the waterproof sealing sleeve is sealed to the plastic part.

15. The waterproof sealing sleeve according to claim 1, characterized in that, The maximum volume expansion rate of the waterproof sealing sleeve is less than or equal to 50%; The waterproof sealing sleeve has a tensile strength of not less than 3 MPa, an elongation at break of not less than 150%, a compression set of not more than 20%, and a tear resistance of not less than 10 KN / m.

16. The waterproof sealing sleeve according to any one of claims 1-15, characterized in that, The materials of the waterproof sealing sleeve include: 100 parts by weight of rubber matrix material, 25-35 parts by weight of water-absorbing and swelling resin, 20-35 parts by weight of reinforcing agent, 3-7 parts by weight of vulcanizing agent, 1-3 parts by weight of accelerator, 1-3 parts by weight of activator, and 1-4 parts by weight of anti-aging agent. The rubber matrix material is EPDM rubber, and the particle size of the water-absorbing and swelling resin is 150-300 mesh.

17. The waterproof sealing sleeve according to claim 16, characterized in that, In the material of the waterproof sealing sleeve, the water-absorbing and swelling resin is sodium polyacrylate, the reinforcing agent is carbon black, the vulcanizing agent is sulfur, the accelerator includes accelerator TMTD and zinc oxide, and the activator is octadecanoic acid; The materials of the waterproof sealing sleeve include: 100 parts by weight of rubber matrix material, 30 parts by weight of sodium polyacrylate, 25 parts by weight of carbon black, 4 parts by weight of sulfur, 0.5 parts by weight of accelerator TMTD, 0.5 parts by weight of zinc oxide, 2 parts by weight of octadecanoic acid, and 2 parts by weight of anti-aging agent.

18. The waterproof sealing sleeve according to any one of claims 1-15, characterized in that, The materials of the waterproof sealing sleeve include: 100 parts by weight of the main adhesive component, 15-25 parts by weight of water-absorbing and swelling resin, 20-35 parts by weight of reinforcing agent, 3-5 parts by weight of vulcanizing agent, 1-4 parts by weight of accelerator, 2-4 parts by weight of activator, and 1-4 parts by weight of anti-aging agent. The main rubber component includes: 70-80 parts by weight of rubber matrix material and 20-30 parts by weight of polar rubber; The rubber matrix material is EPDM rubber, and the polar rubber includes polyurethane, nitrile rubber or acrylate rubber; the particle size of the water-absorbing and swelling resin is 150-300 mesh.

19. The waterproof sealing sleeve according to claim 18, characterized in that, In the material of the waterproof sealing sleeve, the polar rubber is polyurethane, the water-absorbing and swelling resin is sodium polyacrylate, the reinforcing agent is carbon black, the vulcanizing agent is sulfur, the accelerator includes accelerator TMTD and zinc oxide, and the activator is octadecanoic acid; The materials of the waterproof sealing sleeve include: 75 parts by weight of EPDM rubber, 25 parts by weight of polyurethane, 20 parts by weight of sodium polyacrylate, 25 parts by weight of carbon black, 4 parts by weight of sulfur, 1 part by weight of accelerator TMTD, 1 part by weight of zinc oxide, 3 parts by weight of octadecanoic acid, and 2 parts by weight of anti-aging agent.

20. An electronic device, characterized in that, Includes the waterproof sealing sleeve as described in any one of claims 1-19.

21. The electronic device according to claim 20, characterized in that, There is a clearance between the waterproof sealing sleeve and the electronic components surrounding the waterproof sealing sleeve, and the clearance is not less than 0.6 mm.

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