Key sealing structure and electronic device

Abstract

Provided in the embodiments of the present application are a key sealing structure and an electronic device. The key sealing structure comprises: a middle-frame side wall, which extends in a first direction; a first slot and a second slot, which are spaced apart on the middle-frame side wall in the first direction, wherein a connecting hole is provided between the first slot and the second slot; a key hole, which is formed in the middle-frame side wall and is in communication with the first slot; a key, which is arranged in the key hole and includes a biometric identification module; a flexible flat cable, wherein one end of the flexible flat cable is located in the first slot and is connected to the biometric identification module, and the other end of the flexible flat cable sequentially passes through the connecting hole and the second slot and then extends beyond the second slot; a sealing element, which is arranged in the connecting hole; and a sealant, which is filled in the second slot and submerges the connecting hole. In the key sealing structure, the width of the middle-frame side wall can be reduced, thereby increasing the internal space of an electronic device, such that the electronic device can be used for storing a battery with a higher capacity and a larger size. In addition, the key sealing structure has fewer devices, such that an installation process is simpler.

Description

Key sealing structure and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on June 12, 2023, with application number 202310695420.5 and invention name “A key sealing structure and electronic device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of terminal technology, and in particular to a key sealing structure and an electronic device. Background Art

[0003] Fingerprint recognition modules are common components in electronic devices like mobile phones and tablets, and are widely used in authentication scenarios like mobile payments and screen unlocking. Depending on the technology used, fingerprint recognition modules can be categorized as capacitive, ultrasonic, and optical.

[0004] Early fingerprint recognition modules were typically located in the non-display area at the bottom of the display, or on the back of the electronic device. Later, with the emergence of full-screen electronic devices and the increasing integration of internal components, some fingerprint recognition modules were installed on the sidewalls of the electronic device's midframe and integrated into a button on the sidewalls.

[0005] Typically, a fingerprint recognition module includes a flexible printed circuit (FPC) cable that connects to the electronic device's mainboard. Therefore, when the fingerprint recognition module is integrated into a button on the sidewall of the midframe, a routing channel for the FPC cable is required on the side of the midframe, just outside the button hole. The presence of this routing channel makes it difficult to seal the gap between the button and the button hole. Some sealing structures also increase the width of the midframe sidewall, reducing the internal space of the electronic device, making it difficult to accommodate larger batteries.

[0006] Summary of the Invention

[0007] Embodiments of the present application provide a key seal structure and electronic device that, when a biometric identification module is integrated into a key on a sidewall of a midframe, prevents liquids such as water from entering the interior of the electronic device through the key hole. Furthermore, the key seal structure can reduce the width of the sidewall of the midframe, increasing the internal space of the electronic device and allowing it to accommodate a larger battery. Furthermore, the key seal structure requires fewer components and simplifies the assembly process.

[0008] In a first aspect, an embodiment of the present application provides a key sealing structure, including: a middle frame, the middle frame including a middle frame side wall extending along a first direction; a first groove and a second groove, the first groove and the second groove are arranged on the middle frame side wall at intervals along the first direction, and a connecting hole is provided between the first groove and the second groove; a key hole, the key hole is opened on the middle frame side wall and is connected to the first groove; a key, the key is arranged in the key hole, and the key includes a biometric identification module; a flexible cable, one end of the flexible cable is located in the first groove and is connected to the biometric identification module, and the other end passes through the connecting hole and the second groove in sequence and extends to the outside of the second groove; a seal, the seal is arranged in the connecting hole and is used to seal the connecting hole; and a sealant, the sealant is filled in the second groove and submerges the connecting hole.

[0009] The key sealing structure provided in the embodiments of the present application utilizes a first groove, a second groove, and a connecting hole between the first and second grooves to form a routing channel for a flexible cable. This routing channel is sealed using a sealant disposed within the connecting hole and a sealant filled within the second groove. Thus, when the key includes a biometric recognition module, liquid that enters the first groove through the key hole will not enter the second groove, and therefore, will not enter the interior of the electronic device through the second groove, thereby achieving a waterproof seal for the key hole. Furthermore, because the first and second grooves are arranged along a first direction, the flexible cable can be routed along the first direction, thereby reducing the width of the middle frame sidewall, increasing the internal space of the electronic device and enabling the electronic device to accommodate a larger battery. Furthermore, compared to conventional key sealing structures, the key sealing structure provided in the embodiments of the present application only adds a sealant, sealant, and other structures to the existing middle frame sidewall, resulting in fewer components and a simpler installation process.

[0010] In one implementation, the seal comprises a sealing block and a first sealing ring; the sealing block is disposed within the connection hole; the first sealing ring is sleeved on the sealing block and positioned between the sealing block and the inner wall of the connection hole; and the flexible cable is threaded between the first sealing ring and the inner wall of the connection hole. The radial width of the first sealing ring is greater than the distance between the sealing block and the inner wall of the connection hole, so that the first sealing ring forms an interference fit with the connection hole under the pressure of the sealing block and the connection hole. This allows the seal to maintain close contact with the inner wall of the connection hole and the flexible cable passing through the connection hole, preventing liquid from passing through the connection hole.

[0011] In one implementation, the sealing member includes a second sealing ring disposed within the connecting hole and including a threading hole formed along a first direction. The flexible cable is threaded through the threading hole, forming an interference fit therewith. The second sealing ring is larger than the connecting hole, such that, under pressure from the connecting hole, the second sealing ring forms an interference fit therewith. Thus, after the second sealing ring is installed within the connecting hole, the pressure from the connecting hole compresses the threading hole, creating an interference fit between the threading hole and the flexible cable.

[0012] In one implementation, the key sealing structure further includes: a first position-limiting bracket; the first position-limiting bracket includes a bracket body and a sealing block; the bracket body is positioned within the first groove and is used to limit the displacement range of the key when pressed; the bracket body and the sealing block are connected to form an integral structure. In this way, the sealing block and the bracket body are integrated into a single component, reducing the number of components in the key sealing structure, simplifying the installation process, and improving production efficiency. Furthermore, because one end of the bracket body is fixed within the first groove, it can limit the position of the sealing block connected to it, preventing the sealing block from sliding within the connection hole, thereby improving sealing reliability.

[0013] In one implementation, the key sealing structure further includes: a second limiting bracket; the second limiting bracket includes a bracket body; the bracket body is in the first groove and is used to limit the displacement range when the key is pressed.

[0014] In one implementation, one end of the bracket body away from the connecting hole is fixed in the first groove.

[0015] In one implementation, the side wall of the middle frame includes an appearance surface and a first surface for fitting with the back cover of the electronic device; the first groove and the second groove are opened on the first surface; the button hole is opened on the appearance surface and connected to the side wall of the first groove.

[0016] In one implementation, the key sealing structure also includes: a sealing glue line coated on the first surface; the sealing glue line is continuously distributed in the first area, the second area, the third area, the fourth area and the fifth area of ​​the first surface; the first area and the second area are areas of the outer edge of the first groove, wherein the first area is located on the opposite side of the second groove, and the second area is located on the opposite side of the appearance surface; the third area is located between the first groove and the second groove; the fourth area and the fifth area are areas of the outer edge of the second groove, wherein the fourth area is located between the second groove and the appearance surface, and the fifth area is located on the opposite side of the first groove.

[0017] In this way, by using the "C"-shaped glue lines of the sealing glue lines in the first area, the second area and the third area, as well as the glue on the side walls of the middle frame and the edges of the back cover, a sealed area can be formed between the first groove and the back cover, thereby preventing liquid in this area from flowing into other areas between the middle frame and the back cover, thereby achieving a waterproof seal.

[0018] The sealant also forms a "C"-shaped line in the third, fourth, and fifth areas, creating a gap on the side of the second groove away from the exterior surface. This allows the flexible cable to pass through this gap, extending from the side of the second groove away from the exterior surface, out of the groove, and continue toward the motherboard.

[0019] In one implementation, the key sealing structure also includes: a guide rod; the guide rod is arranged in the first groove and is located between the bracket body and the bottom surface of the first groove; along the pressing direction of the key, one end of the guide rod abuts against the key, and the other end is used to close the switch device corresponding to the key when the key is pressed.

[0020] In one implementation, the guide rod further includes at least one limiting slot; the bracket body further includes a limiting plate corresponding to the limiting slot, the limiting plate being embedded in the limiting slot; and along the key pressing direction, the width of the limiting slot is greater than the thickness of the limiting plate. Thus, the limiting slot and the limiting plate cooperate to limit the key pressing depth and prevent the key from falling out of the key hole.

[0021] In one implementation, a bracket fixing seat is also provided in the first groove, and the bracket fixing seat is located at the end of the first groove away from the connecting hole; a recessed groove is provided on the top of the bracket fixing seat, and a threaded hole is provided in the recessed groove; the end of the bracket body away from the connecting hole also includes a limiting ring, and the limiting ring is located in the recessed groove; the bracket body is fixed to the bracket fixing seat by screws screwed into the limiting ring and the threaded hole.

[0022] In one implementation, the flexible cable extends from a side of the second groove away from the exterior surface to outside the second groove.

[0023] In one implementation, the biometric recognition module is a fingerprint recognition module.

[0024] In a second aspect, an embodiment of the present application further provides an electronic device, wherein the electronic device includes the key sealing structure provided by the first aspect and its various implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1A is a schematic diagram of an exemplary structure of a non-folding screen electronic device;

[0026] FIG1B is a schematic diagram of an exemplary structure of a foldable screen electronic device;

[0027] FIG2 is a partial cross-sectional view of a key without an integrated fingerprint recognition module;

[0028] FIG3 is a partial cross-sectional view of a key integrated with a fingerprint recognition module;

[0029] FIG4 is a schematic diagram of a sealing structure of a key integrated with a fingerprint recognition module;

[0030] FIG5 is a schematic diagram of another sealing structure of a key integrated with a fingerprint recognition module;

[0031] FIG6 is an exploded view of the key sealing structure provided in an embodiment of the present application;

[0032] FIG7 is a schematic diagram of the cooperation between the key hole and the key in the key sealing structure provided in an embodiment of the present application;

[0033] FIG8 is a schematic diagram of the cooperation between the sealing member and the connecting hole in the key sealing structure provided in an embodiment of the present application;

[0034] FIG9 is a schematic diagram of filling the sealant in the key sealing structure provided in an embodiment of the present application;

[0035] FIG10A is a first structural schematic diagram of a sealing member provided in an embodiment of the present application;

[0036] 10B and 10C are schematic diagrams showing the cooperation between the sealing member, the connection hole, and the flexible cable provided in an embodiment of the present application;

[0037] FIG11A is a second structural schematic diagram of a sealing member provided in an embodiment of the present application;

[0038] FIG11B is a schematic diagram of the cooperation between the sealing member, the connection hole, and the flexible cable provided in an embodiment of the present application;

[0039] FIG12 is a schematic structural diagram of a second position-limiting bracket in a key sealing structure provided in an embodiment of the present application;

[0040] FIG13 is a schematic structural diagram of a guide rod in a key sealing structure provided in an embodiment of the present application;

[0041] 14A and 14B are schematic diagrams of the installation of the first groove and the bracket body provided in an embodiment of the present application;

[0042] 15A and 15B are schematic structural diagrams of the sealing glue line in the key sealing structure provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] Fingerprint recognition modules are common components in electronic devices like mobile phones and tablets, and are widely used in authentication scenarios like mobile payments and screen unlocking. Depending on the technology used, fingerprint recognition modules can be categorized as capacitive, ultrasonic, and optical.

[0044] Early fingerprint recognition modules were typically located in the non-display area at the bottom of the display, or on the back of the electronic device. Later, with the emergence of full-screen electronic devices and the increasing integration of internal components, some fingerprint recognition modules were installed on the sidewalls of the electronic device's midframe and integrated into a button on the sidewalls.

[0045] The following is an illustrative description of the form of an electronic device including a side fingerprint recognition module with reference to the accompanying drawings.

[0046] Electronic devices can be categorized as either non-foldable or foldable. Examples of non-foldable devices include traditional candy-bar phones, tablets, and smartwatches, while foldable devices include foldable phones.

[0047] FIG1A is a schematic diagram of an exemplary structure of a non-folding screen electronic device.

[0048] As shown in FIG. 1A , the electronic device may include a middle frame 10 , a display screen 20 and a back cover 30 .

[0049] For the convenience of description, a three-dimensional rectangular coordinate system may be established for the electronic device.

[0050] For example, a three-dimensional rectangular coordinate system may be established by taking the width direction of the electronic device as the x-axis direction, the length direction of the electronic device as the y-axis direction, and the thickness direction of the electronic device as the z-axis direction.

[0051] The middle frame 10 may include a sidewall 11 extending along the z-axis, with the sidewall 11 having a certain width along the z-axis. The display 20 is fastened to one side of the sidewall 11 along the z-axis, and the back cover 30 is fastened to the other side of the sidewall 11 along the z-axis.

[0052] The middle frame sidewalls 11 can be made of metal, such as aluminum-magnesium alloy, stainless steel, etc., or plastic. The middle frame sidewalls 11 can be bonded to the back cover 30 or the display screen 20 using glue, or can be assembled together using components such as the display screen 20 bracket.

[0053] It is understood that the sidewalls 11 can have various shapes depending on the form factor of the electronic device. For example, if the electronic device is a non-folding screen mobile phone, the sidewalls 11 can be rectangular, with the short side of the sidewalls 11 extending along the x-axis and the long side of the sidewalls 11 extending along the y-axis. If the electronic device is a smartwatch, the sidewalls 11 can be rectangular or circular.

[0054] FIG1B is a schematic diagram of an exemplary structure of a foldable screen electronic device.

[0055] As shown in FIG. 1B , the electronic device may include a first body 40 , a second body 50 , a hinge 60 , and a display screen 20 .

[0056] The first body 40 and the second body 50 are located on both sides of the rotating shaft and are connected by the rotating shaft. The display screen is buckled on the first body 40 and the second body 50. When the first body 40 and the second body 50 rotate around the rotating shaft, the display screen 20 can be folded and unfolded. According to the different folding directions of the display screen 20, folding screen electronic devices can be divided into internal folding screen devices and external folding screen devices. The first body 40 and the second body 50 of the internal folding screen device can be folded toward one side of the display screen 20, and the display screen 20 is hidden in the folded state and presents a straight screen effect in the unfolded state; the first body 40 and the second body 50 of the external folding screen device can be folded toward the opposite side of the display screen 20, and the display screen 20 surrounds the outside of the electronic device in the folded state and presents a straight screen effect in the unfolded state.

[0057] The first body 40 and the second body 50 of the electronic device may each include a middle frame.

[0058] Taking the first body 40 as an example, the middle frame of the first body 40 may include a middle frame side wall 11 .

[0059] For example, for ease of description, the width direction of the first body 40 can be used as the x-axis direction, the length direction of the first body 40 as the y-axis direction, and the thickness direction of the first body 40 as the z-axis direction to establish a three-dimensional rectangular coordinate system.

[0060] The middle frame sidewall 11 can be arranged around the z-axis and has a certain width along the z-axis. The display screen 20 is fastened to one side of the middle frame sidewall 11 along the z-axis, and the back cover of the first body 40 is fastened to the other side of the middle frame sidewall 11 along the z-axis.

[0061] In the electronic device shown in Figures 1A and 1B, the sidewall 11 of the midframe may include one or more buttons 12 for performing different functions, such as a power button, a volume button, etc. The fingerprint recognition module of the electronic device can be integrated into any button 12 on the sidewall 11 of the midframe, such as the power button. In this way, when a user needs to perform fingerprint verification, they can place their finger on the button 12, allowing the fingerprint recognition module to capture the user's fingerprint and perform the verification process.

[0062] FIG2 is a partial cross-sectional view of a key without an integrated fingerprint recognition module.

[0063] As shown in Figure 2, in order to set a button 12 on the middle frame side wall 11, a button hole 13 can be provided on the middle frame side wall 11. The shape of the button hole 13 matches the shape of the button 12, and the size is slightly larger than the button 12, so as to form a clearance fit with the button 12, so that the button 12 can be pressed flexibly. It is understandable that due to the existence of the gap, when the electronic device comes into contact with liquids such as water, the liquid may enter the interior of the electronic device through the gap. Therefore, in order to prevent liquid from entering the interior of the electronic device through the gap and to make the electronic device have a certain degree of waterproof performance, some electronic devices may seal the button 12.

[0064] For example, as shown in FIG2 , a guide rod 14 is provided at the bottom of the key 12 along the direction of the key hole 13, for example, the x-axis. The guide rod 14 extends along the x-axis, with one end abutting the bottom of the key 12 and the other end facing the switch contact 15 of the key 12. Thus, when a user presses the key 12, the key 12 pushes the guide rod 14 along the x-axis, pressing the switch contact 15 and triggering the corresponding function of the key 12.

[0065] In the structure of this traditional key 12, the inner wall 16 of the key hole 13 can extend to the side of the guide rod 14. In this way, a sealing ring 17 can be installed on the guide rod 14. The interference fit formed by the sealing ring, the side of the guide rod 14 and the inner wall 16 of the key hole 13 can fill the gap between the side of the guide rod 14 and the inner wall 16 of the key hole 13, thereby preventing liquid from entering the interior of the electronic device.

[0066] FIG3 is a partial cross-sectional view of a key integrated with a fingerprint recognition module.

[0067] As shown in Figure 3, the button 12 is positioned within the button hole 13 of the middle frame sidewall 11. The fingerprint recognition module 18 can be integrated into the button 12, for example, encased within the housing structure of the button 12. In this way, the fingerprint recognition module 18 and the button 12 can be integrated into a single unit. An FPC cable 19 for the fingerprint recognition module 18 is located within the button hole 13. One end of the FPC cable 19 extends from one side of the fingerprint recognition module 18 and is routed along a predetermined path. The other end of the FPC cable 19, away from the fingerprint recognition module 18, can be connected to the motherboard of the electronic device via a connector or the like. Therefore, when a user touches or presses the button 12, the FPC cable 19 transmits the electrical signal generated by the fingerprint recognition module 18 to the motherboard of the electronic device.

[0068] It's understandable that due to the presence of the FPC cable 19, a routing channel for the FPC cable 19 must be provided on the side of the middle frame sidewall 11 on one side of the button hole 13. The presence of this routing channel makes it difficult to seal the gap between the button 12 and the button hole 13 using traditional methods, such as inserting a sealing ring around the guide rod 14 of the button 12.

[0069] Furthermore, since the fingerprint recognition module 18 includes devices for realizing the fingerprint collection function, such as capacitor devices, optical devices, ultrasonic devices, etc., the thickness of the key 12 integrated with the fingerprint recognition module 18 in the x-axis direction will be greater than that of the traditional key 12 without the fingerprint recognition module 18. In addition, in order for the sealing ring to be able to be mounted on the guide rod 14, the guide rod 14 also needs to have a certain length in the x-axis. In this case, even if some method is adopted to achieve the gap between the key 12 and the key hole 13 by mounting a sealing ring on the guide rod 14, it will cause the sum of the dimensions of the key 12 and the guide rod 14 in the x-axis direction to be too large, thereby increasing the width of the middle frame side wall 11 in the x-axis direction, reducing the internal space of the electronic device, and making it difficult for the electronic device to accommodate a battery with a larger capacity and a larger size.

[0070] Furthermore, after exiting the fingerprint sensor module 18, the FPC cable 19 typically bends near the midframe sidewall 11 between the battery and the electronic device's back cover, where it is routed to the electronic device's motherboard. Therefore, applying glue or adhesive between the bend in the cable and the back cover can provide a certain sealing effect. However, this type of sealing method suffers from poor stability, making it difficult to ensure consistent application, and can also make the battery difficult to remove.

[0071] FIG4 is a schematic diagram of a sealing structure of a key integrated with a fingerprint recognition module.

[0072] As shown in Figure 4, to prevent liquids such as water from entering the electronic device through the button holes, the FPC cable 19 can be routed through the sidewall of the middle frame, starting from the side facing the back cover, to form a cable trough 41 with a certain depth along the z-axis. This creates an outer wall 42 on one side of the cable trough 41 and an inner wall 43 on the other side. The bottom of the cable trough 41 has a certain thickness, forming a bottom wall 44. The bottom wall 44 connects to the inner wall 43, forming an L-shaped structure. After exiting the fingerprint recognition module, the FPC cable 19 can be routed along the sidewall of the middle frame into the cable trough 41. It can then be routed along the x-axis from the side closest to the outer wall 42 to the side closest to the inner wall 43. Finally, it can be routed from the opening of the cable trough 41 to the exterior of the cable trough 41 on the side closest to the inner wall 43.

[0073] A plastic bracket 45 is also provided in the wire trough 41. The plastic bracket 45 rests on the intersection of the inner wall 43 and the bottom wall 44 of the wire trough. The width of the plastic bracket 45 in the x-axis direction gradually decreases from the bottom of the wire trough 41 to the opening of the wire trough 41, thereby forming an inclined surface on the side away from the inner wall 43 and the bottom wall 44 of the wire trough. The FPC cable 19 rests on the inclined surface and can be fixed by the adhesive 46. A rubber wedge 47 is also provided in the wire trough 41. The rubber wedge 47 is embedded between the inclined surface and the outer wall 42 to fill the wire trough 41 and cooperates with the plastic bracket 45 to form a clamp for the FPC cable 19. Along the z-axis, the top of the wire trough 41 is a certain depth away from the top of the plastic bracket 45 and the top of the rubber wedge 47. A sealant 48 is further provided in the wire trough 41 . The sealant 48 covers the top of the rubber wedge 47 and the top of the plastic bracket 45 , thereby sealing the opening of the wire trough 41 .

[0074] FIG4 shows a key sealing structure that can prevent liquids such as water from entering the interior of the electronic device through the key hole. However, in this structure, the FPC cable 19 is routed in the wire groove 41 along the x-axis direction. A plastic bracket 45, a rubber wedge 47, and other components are also provided in the wire groove 41 along the x-axis direction. Therefore, the wire groove 41 needs to have a larger width in the x-axis direction, which increases the width of the side wall of the middle frame along the x-axis direction, reduces the internal space of the electronic device, and makes it difficult for the electronic device to accommodate a battery with larger capacity and size.

[0075] FIG5 is a schematic diagram of another sealing structure of a key integrated with a fingerprint recognition module.

[0076] As shown in Figure 5, to prevent liquids such as water from entering the electronic device through the keyhole 13, a groove can be cut in the middle frame sidewall 11 in the area of ​​the keyhole 13, starting from the side of the middle frame sidewall 11 facing the back cover, to form a wire groove 51 that connects to the keyhole 13. A cable support 52 is provided within the wire groove 51. A certain gap exists between the cable support 52 and the inner wall of the wire groove 51. This gap can be filled with a rubber ring 53 that is sleeved around the outer periphery of the cable support 52 to achieve a seal between the cable support 52 and the inner wall of the wire groove 51. The cable support 52 includes a through hole 54 extending along the z-axis. After being led out of the fingerprint recognition module, the FPC cable 19 can be routed along the x-axis from the side closest to the outer wall to the bottom of the through hole 54. From the bottom of the through hole 54, it can pass upward through the through hole 54 and be routed out of the wire groove 51 from the top. The cable bracket 52 is also provided with a foam pad 55 surrounding the top of the through-hole 54. After the FPC cable 19 passes through the through-hole 54, it can bend to one side, pass over the foam pad 55, and be routed to the location where it needs to be connected to the PCB board of the electronic device. The key sealing structure also includes a cover plate 57, which can be crimped onto the foam pad 55 to block the through-hole 54. The side of the cover plate 57 facing the foam pad 55 is also provided with adhesive 56. In this way, after the cover plate 57 is crimped onto the foam pad 55, the adhesive 56 can adhere to the foam pad 55, thereby sealing the gap between the foam pad 55 and the cover plate 57. The cover plate 57 can be fixed to the middle frame side wall 11 via screws 58. In this way, the cover plate 57 applies a certain amount of pressure to the foam pad 55, compressing the foam pad 55 and clamping the FPC cable 19 with the cover plate 57, improving the sealing reliability.

[0077] The key seal structure shown in Figure 5 can prevent liquids such as water from entering the interior of the electronic device through the key hole 13. However, in this structure, the FPC cable 19 is routed along the x-axis within the cable trough 51, which also contains a cable support 52. Therefore, similar to the structure shown in Figure 4, the cable trough 51 also needs to be wider in the x-axis direction, increasing the width of the middle frame side wall 11 and reducing the internal space of the electronic device, making it difficult to accommodate a larger battery with a larger capacity. In addition, the key seal structure includes multiple components such as the cable support 52, foam 55, cover 57, adhesive 56, and screws 58, making its installation process more complicated.

[0078] The present invention provides a key sealing structure that prevents liquids such as water from entering the interior of an electronic device through the key hole when a fingerprint recognition module or other biometric recognition module is integrated into the key of the middle frame side wall. Furthermore, the key sealing structure can reduce the width of the middle frame side wall, increasing the internal space of the electronic device and allowing the electronic device to accommodate a larger battery with a larger capacity. Furthermore, the key sealing structure requires fewer components and simplifies the installation process.

[0079] FIG6 is a structural exploded view of the key sealing structure provided in an embodiment of the present application.

[0080] As shown in FIG6 , the key sealing structure may include:

[0081] Middle frame 100 , button 200 , flexible cable 300 , and seal 400 .

[0082] The middle frame 100 includes a middle frame sidewall 110 extending along a first direction.

[0083] It should be noted that, to facilitate description of the extension direction of the middle frame sidewall 110, the embodiment of the present application may define the extension direction of the middle frame sidewall 110 as a first direction. In different electronic devices, the shape of the middle frame sidewall 110 may be different, and therefore, the first direction may also be different.

[0084] For example, when the electronic device is a mobile phone or a tablet computer, the middle frame side wall 110 can be a rectangular side wall formed around the z-axis of the electronic device. Then, the first direction can be the y-axis direction of the electronic device or the x-axis direction.

[0085] For example, when the electronic device is a smart watch, the middle frame side wall 110 may be a circular side wall formed around the z-axis of the electronic device, and the first direction may be a tangential direction of the circular side wall.

[0086] It should be noted that, in FIG6 , the first direction is exemplarily the y-axis direction.

[0087] It is understood that the sidewall 110 serves as a support structure for the display screen and back cover of the electronic device, with one side attached to the display screen and the other to the back cover. After the display screen and back cover are attached to the sidewall 110, the portion of the sidewall 110 between the display screen and back cover is exposed to the electronic device. This portion can be referred to as the exterior surface 111 of the sidewall 110.

[0088] A first groove 112 and a second groove 113 are defined on the middle frame sidewall 110 , wherein the first groove 112 and the second groove 113 are spaced apart along a first direction on the middle frame sidewall 110 .

[0089] In some embodiments, the first groove 112 and the second groove 113 may be formed on the first surface 114 of the middle frame sidewall 110 .

[0090] For example, the first surface 114 may be a surface of the midframe sidewall 110 that is adapted to mate with the back cover of the electronic device. Accordingly, the shape of the first surface 114 may match the shape of the edge of the back cover. For example, if the edge of the back cover is curved, the first surface 114 may be curved; if the edge of the back cover is flat, the first surface 114 may be flat.

[0091] For example, the first surface 114 may also be the surface of the midframe sidewall 110 that is adapted to mate with the screen of the electronic device. Accordingly, the shape of the first surface 114 may match the shape of the edge of the screen. For example, if the edge of the screen is curved, the first surface 114 may be curved; if the edge of the screen is flat, the first surface 114 may be flat.

[0092] The first groove 112 can be a strip-shaped groove, whose length direction can be parallel to the first direction and whose width direction can be perpendicular to the first direction. The first groove 112 can extend to a certain depth inside the middle frame sidewall 110 and does not penetrate the middle frame sidewall 110, thereby forming a closed groove bottom surface 115 at the bottom of the first groove 112. The depth direction of the first groove 112 can be parallel to the z-axis or at a certain angle relative to the z-axis, which is not limited in this embodiment of the application.

[0093] The second groove 113 can be a strip-shaped groove, the length of which can be parallel to the first direction and the width of which can be perpendicular to the first direction. The length of the second groove 113 can be the same as or different from the length of the first groove 112. Preferably, the length of the second groove 113 is less than the length of the first groove 112. The width of the second groove 113 can be the same as the width of the first groove 112. Preferably, the width of the second groove 113 is less than or equal to the width of the first groove 112 so as not to increase the required width of the middle frame sidewall 110 perpendicular to the first direction. The second groove 113 can form a certain depth into the middle frame sidewall 110 and does not penetrate the middle frame sidewall 110. The depth direction of the second groove 113 can be parallel to the z-axis or have a certain angle relative to the z-axis, which is not limited in this embodiment of the present application.

[0094] In the embodiment of the present application, a connecting hole 117 is further provided between the first groove 112 and the second groove 113. The connecting hole 117 can connect the first groove 112 and the second groove 113, so that some devices can be arranged between the first groove 112 and the second groove 113.

[0095] In a specific implementation, because the first groove 112 and the second groove 113 are spaced apart along the first direction, the middle frame sidewall 110 can form a retaining wall 118 between the first groove 112 and the second groove 113. A connecting hole 117 can be provided on the retaining wall 118, thereby connecting the first groove 112 with the second groove 113. A certain distance is maintained between the inner wall of the connecting hole 117 and the first surface 114. In other words, the connecting hole 117 does not damage the first surface 114. Thus, the first surface 114 remains continuous between the first groove 112 and the second groove 113.

[0096] The middle frame sidewall 110 is also provided with a button hole 116. The button hole 116 can be provided on the exterior surface 111 of the middle frame sidewall 110, extending from the exterior surface 111 of the middle frame sidewall 110 to the first groove 112. In this way, the button hole 116 can communicate with the first groove 112. To facilitate description of the direction in which the button hole 116 is provided, the embodiment of the present application may define the direction in which the button hole 116 is provided as a second direction. Generally speaking, the second direction may be perpendicular to the first direction. In other words, if the first direction is the y-axis direction of the electronic device, then the second direction may be the x-axis direction of the electronic device. If the first direction is the x-axis direction of the electronic device, then the second direction may be the y-axis direction of the electronic device.

[0097] It should be noted that, generally speaking, the back cover (or display screen) of the electronic device and the first surface 114 can be bonded together by adhesive. Then, in the embodiment of the present application, the adhesive between the back cover (or display screen) of the electronic device and the first surface 114 can also be distributed on the outer edge of the first groove 112. In this way, after the back cover (or display screen) of the electronic device is bonded to the first surface 114, the adhesive can block the gap between the back cover (or display screen) of the electronic device and the first surface 114 in the outer edge area of ​​the first groove 112, so that the liquid entering the first groove 112 from the button hole 116 will not enter the interior of the electronic device from between the back cover (or display screen) of the electronic device and the first surface 114.

[0098] In FIG. 6 , the second direction is exemplarily the x-axis direction.

[0099] FIG7 is a schematic diagram of the cooperation between the button hole and the button in the button sealing structure provided in an embodiment of the present application.

[0100] As shown in Figures 6 and 7 , the key 200 is disposed within the key hole 116. Along the second direction, the end surface of the key 200 facing the first groove 112 is referred to as the key bottom surface 220, and the end surface of the key 200 facing away from the first groove 112 is referred to as the key top surface 230. When the key 200 is not pressed, the key top surface 230 may protrude a certain distance outward from the exterior surface 111, and the key bottom surface 220 may be coplanar with the first sidewall 119 of the first groove 112, or located within the first groove 112. The first sidewall 119 is the sidewall of the first groove 112 that is closest to the exterior surface 111.

[0101] The shape of the key 200 matches the shape of the key hole 116 , and the size of the key 200 is smaller than the size of the key hole 116 so that the key hole 116 and the key 200 can form a clearance fit, allowing the key 200 to be pressed flexibly.

[0102] For example, the button 200 may be a bar-shaped button, and accordingly, the button hole 116 may be a bar-shaped hole; or the button 200 may be a round button, and accordingly, the button hole 116 may be a round hole. This embodiment of the present application does not limit this.

[0103] In addition, based on the function of the button 200, the button 200 can be a power button, a volume button, a mute mode switch button, or other buttons 200 configured to implement certain functions. This embodiment of the present application does not limit this.

[0104] In the embodiment of the present application, the button 200 may include a biometric recognition module 210 .

[0105] The biometric identification module 210 can be a part of the button 200 and integrated into one device. Alternatively, the button 200 can also serve as a shell of the biometric identification module 210, enclosing the biometric identification module 210 in the shell.

[0106] The biometric recognition module 210 in the embodiment of the present application includes, but is not limited to, a fingerprint recognition module, a blood oxygen detection module, a blood glucose detection module, a heart rate detection module, etc. The fingerprint recognition module may be, for example, a capacitive fingerprint recognition module, an optical fingerprint recognition module, an ultrasonic fingerprint recognition module, etc. This embodiment of the present application does not limit this.

[0107] It is understood that the biometric recognition module 210, such as a fingerprint recognition module, typically includes a flexible cable 300 for transmitting signals and powering other components in the electronic device (e.g., a system-on-chip (SoC)). The flexible cable 300 can be, for example, an FPC cable, also known as a soft cable.

[0108] In the embodiment of the present application, one end of the flexible cable 300 is located in the first groove 112 and connected to the biometric identification module 210. The other end is routed along the first direction, sequentially passing through the connection hole 117 and the second groove 113, and extending outside the second groove 113. Within the first groove 112, the flexible cable 300 can be close to the first sidewall 119 so as not to occupy space in the second direction.

[0109] It is understandable that since the flexible cable 300 is routed along the first direction, the first groove 112 and the second groove 113 do not need to provide routing space for the flexible cable 300 in the second direction, thereby reducing the width of the middle frame sidewall 110 in the second direction.

[0110] FIG8 is a schematic diagram of the cooperation between the sealing member and the connecting hole in the key sealing structure provided in an embodiment of the present application.

[0111] As shown in FIG8 , a sealing member 400 is disposed within the connection hole 117. The sealing member 400 is used to seal the connection hole 117 to prevent liquid, etc., that has entered the first groove 112 from entering the second groove 113 through the connection hole 117. Accordingly, the sealing member 400 may have a shape that matches the connection hole 117. For example, if the connection hole 117 is rectangular, the cross-section of the sealing member 400 may be rectangular; if the connection hole 117 is circular, the cross-section of the sealing member 400 may be circular. The overall dimensions of the sealing member 400 may be slightly larger than the dimensions of the connection hole 117. This allows the sealing member 400 to form an interference fit with the connection hole 117, closely contacting the inner wall of the connection hole 117 and the flexible flat cable 300 passing through the connection hole 117, thereby preventing liquid from passing through the connection hole 117.

[0112] FIG9 is a schematic diagram of filling the sealant 500 in the key sealing structure provided in an embodiment of the present application.

[0113] As shown in Figure 9, to enhance the sealing effect, the second groove 113 is also filled with sealant 500. After the sealing member 400 is inserted into the connection hole 117, the sealant 500 can be filled into the second groove 113. The amount of sealant 500 filled should be sufficient to completely submerge the connection hole 117. This way, the sealant 500 completely blocks the connection hole 117. Even if liquid passes through the connection hole 117, it will not flow into the second groove 113, nor will it flow from the second groove 113 into the interior of the electronic device. Furthermore, the sealant 500 secures and guides the flexible cable 300 within the second groove 113, allowing it to be routed in a designated direction out of the second groove 113.

[0114] As can be seen from the above technical solutions, the key sealing structure provided in the embodiment of the present application utilizes the first groove 112, the second groove 113, and the connecting hole 117 between the first groove 112 and the second groove 113 to form a routing channel for the flexible cable 300. The routing channel for the flexible cable 300 is sealed by the sealing member 400 disposed in the connecting hole 117 and the sealant 500 filled in the second groove 113. Thus, when the key 200 includes the biometric recognition module 210, even if liquids such as water enter the first groove 112 through the key hole 116, they will not further enter the second groove 113, nor will they enter the interior of the electronic device from the second groove 113, thereby achieving a waterproof seal for the key hole 116.

[0115] Furthermore, because the first and second grooves 112, 113 are arranged along the first direction, the flexible cable 300 can be routed along the first direction, passing through the connection hole 117, and into the second groove 113. Therefore, the first and second grooves 112, 113 do not need to provide routing space for the flexible cable 300 in the second direction. This allows the width of the first and second grooves 112, 113 in the second direction to be smaller, thereby reducing the width of the middle frame sidewall 110 in the second direction. This increases the internal space of the electronic device and allows the electronic device to accommodate a larger battery with a larger capacity.

[0116] In addition, compared with the traditional key sealing structure, the key sealing structure provided in the embodiment of the present application only adds structures such as a seal 400 and a sealant 500 on the basis of the original middle frame side wall 110. Therefore, the number of components is smaller and the structure is simpler, which greatly simplifies the installation process, improves production efficiency, reduces failure points caused by component failure, and improves sealing reliability.

[0117] FIG10A is a first structural schematic diagram of a seal provided in an embodiment of the present application.

[0118] 10B and 10C are schematic diagrams showing the cooperation between the sealing member, the connection hole, and the flexible cable provided in an embodiment of the present application.

[0119] As shown in FIG10A , FIG10B and FIG10C , in some embodiments, the sealing member 400 may include a sealing block 410 and a first sealing ring 420 .

[0120] Sealing block 410 can be made of a hard material such as plastic or metal, or a soft material such as rubber, without specific limitations herein. The shape of sealing block 410 can match that of connection hole 117. For example, if connection hole 117 is rectangular, then the cross-section of sealing block 410 can be rectangular; if connection hole 117 is circular, then the cross-section of sealing block 410 can be circular. The size of sealing block 410 can be slightly smaller than that of connection hole 117. When sealing block 410 is independently positioned within connection hole 117, a certain distance exists between sealing block 410 and the inner wall of connection hole 117.

[0121] The first sealing ring 420 may be an annular sealing ring that matches the cross-sectional shape of the sealing block 410 and may be made of a material having a certain elasticity, such as rubber or resin. The first sealing ring 420 may be sleeved on the sealing block 410 to form a combined body.

[0122] The combined assembly of the sealing block 410 and the first sealing ring 420 can then be inserted into the connection hole 117. Specifically, the flexible cable 300 can be placed against the inner wall of the connection hole 117, and then the combined assembly of the sealing block 410 and the first sealing ring 420 can be inserted into the connection hole 117, with the flexible cable 300 passing between the first sealing ring 420 and the inner wall of the connection hole 117.

[0123] For example, when the flexible cable 300 passes through the connection hole 117, it can be attached to the side wall of the connection hole 117 close to the appearance surface 111. In this way, after the combination formed by the sealing block 410 and the first sealing ring 420 is inserted into the connection hole 117, the flexible cable 300 will not be twisted or significantly bent, and is not easily damaged.

[0124] It should be noted that, when the first sealing ring 420 is not deformed by force, its radial width is greater than the distance between the sealing block 410 and the inner wall of the connecting hole 117. Thus, when the assembly formed by the sealing block 410 and the first sealing ring 420 is inserted into the connecting hole 117, the first sealing ring 420 can form an interference fit with the connecting hole 117 under the pressure of the sealing block 410 and the connecting hole 117.

[0125] The seal 400 provided in the embodiment of the present application utilizes the interference fit formed by the sealing block 410 and the first sealing ring 420 with the connecting hole 117 to seal the connecting hole 117 and prevent the liquid in the first groove 112 from entering the second groove 113 through the connecting hole 117, thereby achieving a sealing effect.

[0126] 10A and 10B , in some embodiments, the key sealing structure may include a first position-limiting bracket 600 . Part of the structure of the sealing member 400 may be integrated on the first position-limiting bracket 600 .

[0127] For example, the first limiting bracket 600 may include a bracket body 610 and a sealing block 410, wherein the bracket body 610 and the sealing block 410 are integrally formed. The bracket body 610 is located in the first groove 112 to limit the displacement range of the button 200 when pressed and to prevent the button 200 from falling out of the button hole 116.

[0128] The bracket body 610 may be a strip-shaped structure, wherein one end of the bracket body 610 is away from the connection hole 117 and fixed in the first groove 112 ; the other end of the bracket body 610 extends along the first direction to the vicinity of the connection hole 117 and is connected to the sealing block 410 to form an integral structure.

[0129] In this way, the sealing block 410 and the bracket body 610 can be integrated into a single component, reducing the number of components in the key sealing structure, simplifying the installation process, and improving production efficiency. In addition, because one end of the bracket body 610 is fixed in the first groove 112, it can limit the position of the sealing block 410 connected to it, preventing the sealing block 410 from sliding in the connection hole 117, thereby improving sealing reliability.

[0130] FIG11A is a second structural schematic diagram of the sealing member provided in an embodiment of the present application.

[0131] FIG11B is a schematic diagram of the cooperation between the sealing member, the connecting hole, and the flexible cable provided in an embodiment of the present application.

[0132] As shown in FIG. 11A and FIG. 11B , in some embodiments, the seal 400 may include a second sealing ring 430 .

[0133] The second sealing ring 430 can be an annular sealing ring that matches the cross-sectional shape of the connecting hole 117 and can be made of a material with a certain degree of elasticity, such as rubber or resin. The second sealing ring 430 is a solid structure and is disposed within the connecting hole 117. The second sealing ring 430 is larger than the connecting hole 117. Thus, under the pressure of the connecting hole 117, the second sealing ring 430 can form an interference fit with the connecting hole 117.

[0134] The second sealing ring 430 can have a threading hole 431 formed along the first direction. The flexible cable 300 is inserted into the threading hole 431, forming an interference fit therewith. It is understood that to ensure an interference fit between the threading hole 431 and the flexible cable 300, the shape of the threading hole 431 should match the shape of the flexible cable 300. Generally, the flexible cable 300 is a flat cable with a certain width, so the threading hole 431 can be a flat hole with a certain width. The width of the threading hole 431 can be equal to or slightly larger than the width of the flexible cable 300 to ensure that the flexible cable 300 does not curl or deform within the threading hole 431. Thus, after the second sealing ring 430 is installed in the connection hole 117, the pressure from the connection hole 117 compresses the threading hole 431, creating an interference fit between the threading hole 431 and the flexible cable 300.

[0135] The seal 400 provided in the embodiment of the present application utilizes the interference fit formed between the second sealing ring 430 and the connection hole 117, as well as the interference fit formed between the second sealing ring 430 and the flexible flat cable 300, to block the connection hole 117 and prevent the liquid in the first groove 112 from entering the second groove 113 through the connection hole 117, thereby achieving a sealing effect.

[0136] FIG12 is a schematic structural diagram of the second limiting bracket in the key sealing structure provided in an embodiment of the present application.

[0137] As shown in Figure 12, when the sealing member 400 includes the second sealing ring 430, the key sealing structure includes a second position-limiting bracket 700. Unlike the first position-limiting bracket 600 and the device for sealing the connection hole 117 (e.g., the sealing block 410), which are integrated into one structure, the second position-limiting bracket 700 and the second sealing ring 430 for sealing the connection hole 117 are independent structures.

[0138] Exemplarily, the second limiting bracket 700 may include a bracket body 610. The bracket body 610 may be a strip-shaped structure. One end of the bracket body 610 is away from the connection hole 117 and is fixed within the first groove 112. The other end of the bracket body 610 extends along the first direction to the vicinity of the connection hole 117 and may not be fixed or may be fixed within the first groove 112.

[0139] In this way, although the second sealing ring 430 and the second limiting bracket 700 are independent structures, compared with the number of components in the seal 400 shown in Figure 10A, the seal 400 shown in Figure 11A only includes one component, the second sealing ring 430, which is smaller in number. Therefore, the number of components in the key sealing structure is also reduced, which is conducive to simplifying the installation process and improving production efficiency.

[0140] FIG13 is a schematic structural diagram of a guide rod in a key sealing structure provided in an embodiment of the present application.

[0141] It is understood that when a user presses the button 200, the pressed state of the button 200 is transmitted to the mainboard of the electronic device in the form of an electrical signal. Therefore, a switch device corresponding to the button 200 may also be provided in the first groove 112 (not shown in FIG13 ). The switch device may be disposed opposite the button 200 along the pressing direction of the button 200, for example, on the side wall of the first groove 112 opposite the button 200. When the user presses the button 200, the switch device is closed, thereby generating an electrical signal.

[0142] To achieve this purpose, as shown in Figure 13, a guide rod 800 can also be provided in the first groove 112. The guide rod 800 is located between the bracket body 610 and the groove bottom surface 115 of the first groove 112. In this way, the bracket body 610 can limit the displacement of the guide rod 800 along the second direction, preventing the guide rod 800 from deviating from the designed position. Along the second direction, the guide rod 800 can include a first end 810 facing the button 200, and a second end 820 facing the switch device. The first end 810 of the guide rod 800 abuts the button 200. When the button 200 is pressed, the guide rod 800 is displaced along the second direction with the button 200, so that the second end 820 of the guide rod 800 abuts the switch device and closes the switch device.

[0143] In some implementations, the guide rod 800 may include at least one limiting groove 830, which may be opened along the z-axis direction. Accordingly, the bracket body 610 may include a limiting plate 620 corresponding to the limiting groove 830, and the limiting plate 620 may be embedded in the limiting groove 830. In the second direction, i.e., the pressing direction of the key 200, the width of the limiting groove 830 is greater than the thickness of the limiting plate 620. In this way, the guide rod 800 can be displaced relative to the bracket body 610 along the second direction, and when the inner wall of the limiting groove 830 abuts the limiting plate 620, the guide rod 800 will not continue to displace. Therefore, the limiting groove 830 cooperates with the limiting plate 620 to limit the pressing depth of the key 200 and prevent the key 200 from falling out of the key hole 116.

[0144] For example, the guide rod 800 may include two limiting grooves 830, which may be disposed along the first direction at both ends of the guide rod 800. Accordingly, the bracket body 610 may include two limiting plates 620, which are positioned in a one-to-one correspondence with the two limiting grooves 830 and are respectively embedded in their corresponding limiting grooves 830. Thus, the limiting grooves 830 cooperate with the limiting plates 620 to not only limit the displacement of the guide rod 800 along the first direction, but also limit the displacement of the guide rod 800 along the second direction, thereby preventing the guide rod 800 from deviating from its designed position.

[0145] 14A and 14B are schematic diagrams of the installation of the first groove and the bracket body provided in an embodiment of the present application.

[0146] In some embodiments, as shown in FIG. 14A and FIG. 14B , the first groove 112 further includes a bracket fixing seat 120 .

[0147] The bracket fixing seat 120 can be positioned at the end of the first groove 112 away from the connecting hole 117, and is positioned at a certain height along the z-axis from the groove bottom surface 115 of the first groove 112. A recessed groove 121 is provided at the top of the bracket fixing seat 120, and a threaded hole 122 is provided within the recessed groove 121. The end of the bracket body 610 away from the connecting hole 117 also includes a retaining ring 630, which is located within the recessed groove 121.

[0148] The shape of the recess 121 matches that of the retaining ring 630. The dimensions of the recess 121 can be equal to or larger than those of the retaining ring 630, allowing the retaining ring 630 to fit within the recess 121. For example, the retaining ring 630 can be a circular ring, and the recess 121 can be a circular groove. The inner ring diameter of the retaining ring 630 can be greater than or equal to the nominal diameter of the threaded hole 122. Once the retaining ring 630 is placed within the recess 121, the inner ring of the retaining ring 630 can be coaxial with the threaded hole 122 of the recess 121.

[0149] In this way, the bracket body 610 can be fixed to the bracket fixing seat 120 by screwing the screws into the limiting ring 630 and the threaded hole 122 to limit the displacement of the guide rod 800.

[0150] 15A and 15B are schematic structural diagrams of the sealing glue line in the key sealing structure provided in an embodiment of the present application.

[0151] As shown in FIG. 15A and FIG. 15B , in some embodiments, the key sealing structure further includes: a sealing glue line 900 coated on the first surface 114 .

[0152] The sealing glue line 900 can be distributed at least on the outer edge of the first groove 112. In this way, after the back cover of the electronic device is fastened to the first surface 114, the sealing glue line 900 can seal the gap between the outer edge of the first groove 112 and the back cover, thereby preventing the liquid entering the first groove 112 from entering the interior of the electronic device through the gap between the outer edge of the first groove 112 and the back cover.

[0153] To facilitate description of the distribution of the sealant line 900, the various regions on the first surface 114 located outside the first groove 112 can be described separately, for example, as at least a first region 1141 and a second region 1142. The first region 1141 is located on the opposite side of the second groove 113, and the second region 1142 is located on the opposite side of the exterior surface 111 of the middle frame 100.

[0154] In addition, the area between the first groove 112 and the second groove 113 can also be described as a third area 1143 .

[0155] In addition, each region on the first surface 114 located on the outer edge of the second groove 113 can be described separately, for example, at least as a fourth region 1144 and a fifth region 1145. The fourth region 1144 is located between the second groove 113 and the exterior surface 111 of the middle frame 100, and the fifth region 1145 is located on the opposite side of the first groove 112.

[0156] In some implementations, the sealant line 900 can be continuously routed in the first area 1141, the second area 1142, the third area 1143, the fourth area 1144 and the fifth epitaxial area on the first surface 114, achieving continuous distribution in the above-mentioned areas and forming a "2"-shaped routing layout.

[0157] Generally speaking, the edges of the middle frame sidewall 110 and the back cover 30 can be bonded together using adhesive. In the embodiment of the present application, the sealant lines at the outer edge of the first groove 112, the first area 1141, the second area 1142, and the third area 1143, as well as the adhesive between the middle frame sidewall 110 and the edge of the back cover 30, can block the gap between the back cover 30 and the first surface 114, thereby forming a sealed area between the first groove 112 and the back cover 30. In this way, liquid that enters the first groove 112 through the button hole 116 will not flow into other areas between the back cover 30 and the first surface 114, thus achieving a waterproof seal.

[0158] In addition, the sealant line 900 forms a gap on the side of the second groove 113 away from the exterior surface 111. This gap is interconnected with other areas between the middle frame 100 and the back cover 30. The flexible cable 300 can then pass through this gap, extending from the side of the second groove 113 away from the exterior surface 111 to the outside of the second groove 113 and continuing toward the motherboard. This shows that the key sealing structure provided in this embodiment of the application also avoids the need for dispensing glue or setting adhesive backing between the flexible cable 300 and the back cover 30, eliminating the problems of poor stability and consistency of dispensing glue and adhesive backing, as well as the difficulty in removing the battery caused by dispensing glue and adhesive backing.

[0159] An embodiment of the present application provides an electronic device. The electronic device may be, for example, a non-folding screen device, such as a non-folding screen mobile phone, a tablet computer, a large-screen display device, a personal computer, etc. The electronic device may be a folding screen device, such as a folding screen mobile phone, a scroll screen mobile phone, etc. The electronic device may also be any other form of electronic device with a biometric recognition module integrated on the button. The electronic device may include one or more key sealing structures provided by the embodiments of the present application and its various implementation methods to prevent liquids such as water from entering the interior of the electronic device from the key hole, and can accommodate batteries with larger capacity and larger size.

[0160] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0161] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of this application in detail. It should be understood that the above are only specific implementation methods of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of this application should be included in the scope of protection of this application.

Claims

1. A key sealing structure, It is characterized in that include: A middle frame (100), the middle frame (100) comprising a middle frame side wall (110) extending along a first direction; A first groove (112) and a second groove (113), wherein the first groove (112) and the second groove (113) are arranged on the middle frame side wall (110) at intervals along the first direction, and a connecting hole (117) is arranged between the first groove (112) and the second groove (113); A button hole (116), the button hole (116) being provided on the middle frame side wall (110) and being in communication with the first groove (112); A button (200), the button (200) being arranged in the button hole (116), and the button (200) comprising a biometric feature recognition module (210); a flexible flat cable (300), one end of the flexible flat cable (300) being located in the first groove (112) and connected to the biometric feature recognition module (210), and the other end of the flexible flat cable (300) passing through the connection hole (117) and the second groove (113) in sequence and extending to the outside of the second groove (113); a sealing member (400), the sealing member (400) being arranged in the connecting hole (117) and used for sealing the connecting hole (117); The sealant (500) is filled in the second groove (113) and submerges the connection hole (117).

2. The key sealing structure according to claim 1, It is characterized in that The sealing member (400) comprises a sealing block (410) and a first sealing ring (420); The sealing block (410) is arranged in the connecting hole (117); The first sealing ring (420) is sleeved on the sealing block (410) and is located between the sealing block (410) and the inner wall of the connecting hole (117); The flexible cable (300) is inserted between the first sealing ring (420) and the inner wall of the connecting hole (117); The radial width of the first sealing ring (420) is greater than the distance between the sealing block (410) and the inner wall of the connecting hole (117), so that the first sealing ring (420) forms an interference fit with the connecting hole (117) under the pressure of the sealing block (410) and the connecting hole (117).

3. The key sealing structure according to claim 1, It is characterized in that The sealing member (400) comprises a second sealing ring (430); The second sealing ring (430) is disposed in the connecting hole (117) and comprises a threading hole (431) formed along the first direction; The flexible flat cable (300) is inserted into the threading hole (431) to form an interference fit with the threading hole (431); The size of the second sealing ring (430) is larger than the size of the connecting hole (117), so that the second sealing ring (430) forms an interference fit with the connecting hole (117) under the pressure of the connecting hole (117).

4. The key sealing structure according to claim 2, It is characterized in that Also includes: A first limiting bracket (600); The first limiting bracket (600) comprises a bracket body (610) and the sealing block (410); The support body (610) is in the first groove (112) and is used to limit the displacement range of the button (200) when it is pressed; The support body (610) and the sealing block (410) are connected to form an integrated structure.

5. The key sealing structure according to claim 3, It is characterized in that Also includes: A second limiting bracket (700); The second position-limiting bracket (700) comprises a bracket body (610); The support body (610) is in the first groove (112) and is used to limit the displacement range of the button (200) when it is pressed.

6. The key sealing structure according to claim 4 or 5, It is characterized in that One end of the bracket body (610) away from the connecting hole (117) is fixed in the first groove (112).

7. The key sealing structure according to any one of claims 1 to 6, It is characterized in that The middle frame side wall (110) comprises an appearance surface (111) and a first surface (114) for bonding with a back cover of an electronic device; The first groove (112) and the second groove (113) are opened on the first surface (114); The button hole (116) is opened on the exterior surface (111) and is connected to the side wall of the first groove (112).

8. The key sealing structure according to claim 7, It is characterized in that Also includes: A sealant line (900) coated on the first surface (114); The sealant lines (900) are continuously distributed in a first area (1141), a second area (1142), a third area (1143), a fourth area (1144) and a fifth area (1145) of the first surface (114); The first region (1141) and the second region (1142) are regions on the outer edge of the first groove (112), wherein the first region (1141) is located on the opposite side of the second groove (113), and the second region (1142) is located on the opposite side of the appearance surface (111); The third area (1143) is located between the first groove (112) and the second groove (113); The fourth region (1144) and the fifth region (1145) are regions on the outer edge of the second groove (113), wherein the fourth region (1144) is located between the second groove (113) and the appearance surface (111), and the fifth region (1145) is located on the opposite side of the first groove (112).

9. The key sealing structure according to claim 4 or 5, It is characterized in that Also includes: Guide rod (800); The guide rod (800) is disposed in the first groove (112) and is located between the bracket body (610) and the bottom surface of the first groove (112); Along the pressing direction of the button (200), one end of the guide rod (800) abuts against the button (200), and the other end is used to close the switch device corresponding to the button (200) when the button (200) is pressed.

10. The key sealing structure according to claim 9, It is characterized in that The guide rod (800) further comprises at least one limiting groove (830); The support body (610) further comprises a limiting piece (620) arranged corresponding to the limiting groove (830). The sheet (620) is embedded in the limiting groove (830); Along the pressing direction of the button (200), the width of the limiting groove (830) is greater than the thickness of the limiting plate (620).

11. The key sealing structure according to claim 4 or 5, It is characterized in that A bracket fixing seat (120) is also provided in the first groove (112), and the bracket fixing seat (120) is located at an end of the first groove (112) away from the connecting hole (117); A sink groove (121) is provided at the top of the bracket fixing seat (120), and a threaded hole (122) is provided in the sink groove (121); The end of the bracket body (610) away from the connecting hole (117) further comprises a limiting ring (630), and the limiting ring (630) is located in the sink (121); The support body (610) is fixed to the support fixing seat (120) by screws screwed into the limiting ring (630) and the threaded hole (122).

12. The key sealing structure according to claim 8, It is characterized in that The flexible cable (300) extends from a side of the second groove (113) away from the exterior surface (111) to the outside of the second groove (113).

13. The key sealing structure according to any one of claims 1 to 12, It is characterized in that The biometric feature recognition module (210) is a fingerprint recognition module.

14. An electronic device, It is characterized in that include: The key sealing structure according to any one of claims 1 to 13.

Images