Side key structure and mobile terminal

Abstract

The utility model relates to the technical field of electronic equipment, and provides a side key structure and a mobile terminal. The side key structure comprises a side key module and a pushing piece, the side key module comprises a side key flexible plate, a side key body and a silica gel piece, the side key body is arranged on the side key flexible plate, the silica gel piece is connected with the side key flexible plate, and the side key body is sealed between the silica gel piece and the side key flexible plate; the side key module is inserted into a side key groove formed in the terminal middle frame, and the pushing piece is inserted into the side key groove from the side, opposite to the silica gel piece, of the side key module and applies pressing force towards the silica gel piece to the side key module. According to the side key structure provided by the utility model, the side key module is adopted to be matched with the pushing piece, so that the side key module can be freely installed, then the pushing piece is utilized to apply pressing force to the silica gel piece, the problem of poor waterproof sealing consistency caused by deformation of the silica gel piece in the assembling process can be effectively avoided, batch production is facilitated, the process is simple, and the cost is relatively low.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic devices, in particular to a side key structure and a mobile terminal. Background Art

[0002] For existing mobile terminals such as mobile phones, in order to improve the user experience, waterproof design has been carried out, and the waterproof performance of the side keys of the mobile phone will directly determine the waterproof effect of the mobile phone. At present, the waterproof of mobile phone side keys generally adopts the two-color injection molding process of waterproof silica gel and the front shell, with high cost and complex process. Then, an integrated design of a waterproof silica gel sleeve and a side key flexible circuit board module is considered, but there are the following problems in the assembly of this integrated design: when it is inserted into the side key groove 2' on the middle frame of the front shell, as shown in the reference Figure 1 shown, the downward arrow in the figure indicates the assembly direction. Since it is vertically inserted in the Z direction, the sealing bumps on the waterproof silica gel 1' will slide and rub against the groove wall of the side key groove 2' in the Z direction, the waterproof silica gel will deform, and the waterproof sealing consistency is not good, so it cannot be mass-produced. Summary of the Utility Model

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the utility model provides a side key structure and a mobile terminal.

[0004] The first aspect of the utility model provides a side key structure, which includes a side key module and a tightening member;

[0005] The side key module includes a side key flexible board, a side key body and a silica gel member. The side key body is arranged on the side key flexible board. The silica gel member is connected to the side key flexible board and seals the side key body between the silica gel member and the side key flexible board;

[0006] The side key module is inserted into a side key groove formed on the middle frame of the terminal, and the tightening member is inserted into the side key groove from the side of the side key module facing away from the silica gel member, and applies a pressing force towards the silica gel member to the side key module.

[0007] In some embodiments, the silica gel member is bonded to one side plate surface of the side key flexible board where the side key body is arranged through a back glue, and the back glue is arranged around the side key body.

[0008] In some embodiments, a sealing convex portion is formed on the side of the silica gel member facing away from the side key flexible board. A key cap mounting hole for mounting a key cap and communicating with the side key groove is arranged on the middle frame of the terminal, and the sealing convex portion abuts and seals against the groove wall of the side key groove around the key cap mounting hole.

[0009] In some embodiments, the side key module further includes a metal substrate, the flexible side key plate is fixed on the metal substrate, and the side key body is disposed on a side surface of the flexible side key plate facing away from the metal substrate.

[0010] In some embodiments, in a direction perpendicular to the direction in which the side key module is inserted into the side key slot, the thickness of the side key module is less than the width of the side key slot.

[0011] In some embodiments, in a direction perpendicular to the direction in which the side key module is inserted into the side key slot, the sum of the thickness of the pressing member and the side key module is greater than the width of the side key slot.

[0012] In some embodiments, the pressing member is a pressing steel sheet.

[0013] In some embodiments, the pressing steel sheet includes a steel sheet main body and a supporting boss formed by stamping from one side surface of the steel sheet main body toward the other side surface. The supporting boss protrudes from the surface of the steel sheet main body to form a first supporting surface, and the surface of the steel sheet main body facing away from the first supporting surface forms a second supporting surface. One of the first supporting surface and the second supporting surface abuts against the side key module, and the other abuts against the groove wall of the side key slot.

[0014] In some embodiments, the silica gel member is an integrally injection-molded structure;

[0015] Alternatively, the silica gel member is a two-color injection-molded structure. The silica gel member includes a silica gel main body and a secondary injection-molded body connected to the silica gel main body. The hardness of the secondary injection-molded body is greater than that of the silica gel main body, and the secondary injection-molded body is disposed close to the side key body.

[0016] A second aspect of the present invention provides a mobile terminal, including the side key structure as described in any of the above embodiments.

[0017] The technical solution provided by the present invention has the following advantages compared with the prior art:

[0018] The side key structure and mobile terminal provided by the present utility model include a side key module and a pressing member. Among them, the side key module includes a side key flexible board, a side key body, and a silica gel member. The silica gel member is connected to the side key flexible board and seals the side key body between the silica gel member and the side key flexible board, thereby achieving the sealing and waterproofing of the side key body. The side key module is inserted into a side key slot formed on the middle frame of the terminal. The pressing member is inserted into the side key slot from the side of the side key module facing away from the silica gel member and applies a pressing force towards the silica gel member to the side key module, so that the silica gel member can abut against the groove wall of the side key slot to form interference, achieving the sealing and waterproofing effect. In this way, before inserting the pressing member into the side key slot, the side key module can be freely assembled into the side key slot first, so that the silica gel member does not form interference with the groove wall of the side key slot and the silica gel member will not deform. Then, the pressing member is inserted into the side key slot from the side of the side key module facing away from the silica gel member and applies a pressing force towards the silica gel member to the side key module, so that the silica gel member abuts against the groove wall of the side key slot to form interference, thereby achieving the sealing and waterproofing effect. With such a setting, it can effectively avoid the problem of poor waterproof sealing consistency caused by the deformation of the silica gel member during the assembly process, which is beneficial to mass production, and the process is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present utility model and used together with the specification to explain the principles of the present utility model.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is an assembly schematic diagram of the side key structure in the prior art;

[0022] Figure 2 It is a structural schematic diagram of the side key structure according to an embodiment of the present utility model;

[0023] Figure 3 It is a state schematic diagram of the side key module of the side key structure according to an embodiment of the present utility model before and after assembly;

[0024] Figure 4 It is a state schematic diagram of the pressing member of the side key structure according to an embodiment of the present utility model before and after assembly;

[0025] Figure 5 It is a structural schematic diagram of the side key structure according to an embodiment of the present utility model after assembly is completed;

[0026] Figure 6Schematic structural diagram of the side key structure according to another embodiment of the present utility model;

[0027] Figure 7 Schematic structural diagram of the side key structure after assembly according to another embodiment of the present utility model.

[0028] Wherein, 1' is waterproof silica gel; 2' is the side key groove;

[0029] 1 is the side key module; 11 is the side key flexible board; 12 is the side key body; 13 is the silica gel part; 131 is the sealing convex part; 132 is the silica gel main body; 133 is the secondary injection molded body; 14 is the back glue; 15 is the metal substrate; 2 is the pushing and tightening steel sheet; 21 is the steel sheet main body; 211 is the second supporting surface; 22 is the supporting boss; 221 is the first supporting surface; 3 is the terminal middle frame; 31 is the front shell metal; 32 is the front shell plastic; 33 is the keycap; 301 is the side key groove; 302 is the keycap mounting hole; 4 is the display screen. Specific embodiments

[0030] In order to more clearly understand the above objects, features and advantages of the present utility model, the solutions of the present utility model will be further described below. It should be noted that, without conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0031] Many specific details are set forth in the following description in order to fully understand the present utility model, but the present utility model can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present utility model, rather than all embodiments.

[0032] Referring to Figures 2 to 7 As shown, some embodiments of the present utility model provide a side key structure, including a side key module 1 and a pushing and tightening member.

[0033] Wherein, the side key module 1 includes a side key flexible board 11, a side key body 12 and a silica gel part 13. The side key body 12 is arranged on the side key flexible board 11. The silica gel part 13 is connected to the side key flexible board 11 and seals the side key body 12 between the silica gel part 13 and the side key flexible board 11, thereby realizing the sealing and waterproofing of the side key body 12.

[0034] The side key module 1 is inserted into the side key slot 301 formed on the middle frame 3 of the terminal. The pressing member is inserted into the side key slot 301 from the side of the side key module 1 facing away from the silica gel member 13, and applies a pressing force towards the silica gel member 13 to the side key module 1. That is to say, the pressing member is inserted into the side key slot 301 along the assembly direction of the side key module 1 from the side of the side key module 1 facing away from the silica gel member 13. After being assembled in place, the pressing member will apply a pressing force to the side key module 1 on the side of the side key module 1 facing away from the silica gel member 13, and the pressing force is transmitted from the side of the side key module 1 facing away from the silica gel member 13 towards the silica gel member 13. Specifically, the pressing force is transmitted along a direction perpendicular to the insertion direction and transmitted to the silica gel member 13, so as to apply a pressing force to the silica gel member 13.

[0035] With such a setting, before inserting the pressing member into the side key slot 301, the side key module 1 can be freely assembled into the side key slot 301 first (such as Figure 3 the assembly direction shown by the arrow a in the figure), so that the silica gel member 13 does not interfere with the groove wall of the side key slot 301 and the silica gel member 13 will not be deformed. Then, the pressing member is inserted into the side key slot 301 from the side of the side key module 1 facing away from the silica gel member 13 (such as Figure 4 the assembly direction shown by the arrow a in the figure), and a pressing force towards the silica gel member 13 is applied to the side key module 1 (such as Figure 4 the direction horizontally to the right in the figure), so that the silica gel member 13 abuts against the groove wall of the side key slot 301 to form interference, thereby achieving the sealing and waterproof effect.

[0036] In a specific implementation, the pressing member can be selected to have a sheet-like or plate-like structure with a certain thickness, and the pressing member needs to have a certain structural strength so that it can be inserted into the side key slot 301 from the side of the side key module 1 facing away from the silica gel member 13 and can apply a pressing force towards the silica gel member 13 to the side key module 1. Specifically, the pressing member can be selected as a steel sheet, an aluminum sheet or a plastic sheet, etc. Of course, other suitable materials can also be selected according to needs. In addition, the shape of the pressing member is not limited to being sheet-like or plate-like, and can also be other suitable shapes.

[0037] The side key structure provided by the embodiment of the present invention uses a separate silica gel member 13 connected to the side key flexible board 11 to seal and waterproof the side key body 12, solving the problems of high cost and complex process existing in the existing two-color injection molding solution of waterproof silica gel and the front shell; adopting the solution of the side key module 1 cooperating with the pressing member enables the side key module 1 to be freely installed, solving the problem of unstable assembly caused by the interference between the waterproof silica gel and the side key slot in the existing integrated design solution of waterproof silica gel and the side key flexible circuit board module, resulting in the deformation of the waterproof silica gel in the Z direction (i.e., Figure 3 and Figure 4 the assembly direction shown by the arrow a in the figure), thereby solving the mass production problem.

[0038] In some embodiments, referring to Figure 2 and Figure 6 as shown, the silica gel part 13 is bonded to one side plate surface of the side key flexible plate 11 provided with the side key body 12 through the back glue 14, and the back glue 14 is arranged around the side key body 12. That is to say, the silica gel part 13 is bonded to the side key flexible plate 11 through the back glue 14 to form the side key module 1, and the back glue 14 is arranged around the side key body 12, so that the silica gel part 13 completely covers the side key body 12 arranged on the side key flexible plate 11, realizing sealing the side key body 12 in the sealed space formed between the silica gel part 13 and the side key flexible plate 11, and blocking the entry of external water into the inside of the side key body 12.

[0039] In some embodiments, referring to Figures 3 to 5 、 Figure 7 as shown, a sealing convex part 131 is formed on the side of the silica gel part 13 facing away from the side key flexible plate 11, and a keycap mounting hole 302 for mounting the keycap 33 and communicating with the side key groove 301 is arranged on the terminal middle frame 3. The sealing convex part 131 is in sealing contact with the groove wall of the side key groove 301 around the keycap mounting hole 302. With such a setting, after the side key module 1 and the pressing part are both inserted into the side key groove 301, the pressing part will apply a pressing force towards the silica gel part 13 to the side key module 1, and the sealing convex part 131 on the silica gel part 13 is in interference contact with the groove wall of the side key groove 301 around the keycap mounting hole 302, so as to achieve the sealing and waterproof effect and prevent external water from entering the side key groove 301 through the gap between the keycap 33 and the keycap mounting hole 302.

[0040] In a specific implementation, the sealing convex part 131 can be an annular sealing convex part 131, and the shape of the sealing convex part 131 is adapted to the shape of the keycap mounting hole 302 and is arranged around the keycap mounting hole 302. In this way, the sealing convex part 131 is in sealing contact with the groove wall of the side key groove 301 around the keycap mounting hole 302, so as to form a circumferential seal and prevent external water from entering the side key groove 301 through the gap between the keycap 33 and the keycap mounting hole 302. Referring to Figure 5 as shown, there is a gap between the keycap 33 and the keycap mounting hole 302, and external water can enter the gap formed between the keycap 33 and the keycap mounting hole 302 along the Figure 5 direction shown by the arrow b in

[0041] In a specific implementation, referring to Figure 3 and Figure 4As shown, the middle frame 3 in the terminal may include a front shell metal 31 and a front shell plastic 32. The front shell plastic 32 may be injection molded with the front shell metal 31 by an in-mold injection process to form an integral body. The front shell metal 31 and the front shell plastic 32 together form a side key groove 301 with one end open. Specifically, referring to Figure 5 and Figure 7 As shown, the opening of the side key groove 301 may face the display screen 4 of the mobile terminal. The side key module 1 and the pressing member are inserted into the side key groove 301 from the opening of the side key groove 301.

[0042] Furthermore, referring to Figures 3 to 5 、 Figure 7 As shown, a keycap mounting hole 302 for mounting a keycap 33 is provided on the front shell plastic 32. The keycap mounting hole 302 is communicated with the groove wall of the side key groove 301. A keycap 33 is installed in the keycap mounting hole 302. The keycap 33 is movably installed in the keycap mounting hole 302. The keycap 33 is correspondingly arranged with the side key body 12 of the side key module 1. By pressing the keycap 33, a pressing force can be applied to the silicone member 13 of the side key module 1. The pressing force is transmitted to the side key body 12 of the side key module 1 through the silicone member 13, so as to apply a pressing force to the side key body 12 and trigger the side key body 12 to work.

[0043] In some embodiments, referring to Figure 2 and Figure 6 As shown, the side key module 1 further includes a metal substrate 15. The side key flexible board 11 is fixed on the metal substrate 15. The side key body 12 is arranged on the side surface of the side key flexible board 11 facing away from the metal substrate 15. Such a setting is to enhance the structural strength of the side key module 1 and ensure the stability of the structure of the side key module 1. Specifically, the metal substrate 15 may be made of a stainless steel metal plate. Of course, other metal plates of other materials may also be used. The side key flexible board 11 may be bonded to the metal substrate 15 with conductive adhesive. The metal substrate 15, the side key flexible board 11, the side key body 12 and the silicone member 13 may be connected as a whole to form the side key module 1.

[0044] In some embodiments, referring to Figure 3 As shown, along the direction perpendicular to the direction in which the side key module 1 is inserted into the side key groove 301, such as the horizontal direction shown in Figure 3 As shown, the thickness of the side key module 1 is less than the width of the side key groove 301. Such a setting allows the side key module 1 to be freely assembled into the side key groove 301 before the pressing member is inserted into the side key groove 301 (such as the assembly direction indicated by the arrow a in Figure 3 ), so that the silicone member 13 does not interfere with the groove wall of the side key groove 301 and the silicone member 13 will not be deformed.

[0045] In some embodiments, referring to Figure 4 As shown, along the direction perpendicular to the direction in which the side key module 1 is inserted into the side key groove 301, such asFigure 4 In the horizontal direction shown, the sum of the thicknesses of the pressing member and the side key module 1 is greater than the width of the side key groove 301. With such a setting, after freely assembling the side key module 1 into the side key groove 301, the pressing member is inserted into the side key groove 301 from the side of the side key module 1 facing away from the silica gel member 13 (as shown by the assembly direction of the arrow a in Figure 4 ), and a pressing force towards the silica gel member 13 is applied to the side key module 1 (as shown by the direction horizontally to the right in Figure 4 ), so that the silica gel member 13 abuts against the groove wall of the side key groove 301 to form an interference, thereby achieving a sealing and waterproof effect.

[0046] In a specific implementation, the interference amount between the silica gel member 13 and the groove wall of the side key groove 301 can be set to 0.1 mm, 0.2 mm, 0.3 mm, etc. That is, the sum of the thicknesses of the pressing member and the side key module 1 is greater than the width of the side key groove 301, and the difference between the two can be 0.1 mm, 0.2 mm, 0.3 mm, etc. It should be noted that the sum of the thicknesses of the pressing member and the side key module 1 refers to the sum of the thicknesses of the pressing member and the side key module 1 when the pressing member is attached to the side of the side key module 1 facing away from the silica gel member 13 and the silica gel member 13 is not deformed.

[0047] In some embodiments, the pressing member is a pressing steel sheet 2. The pressing steel sheet 2 has a low cost and high structural strength, and can meet the requirement of being inserted into the side key groove 301 and applying a pressing force to the silica gel member 13. Of course, the pressing member can also be selected from other metal materials, plastic materials, etc. according to needs.

[0048] In some embodiments, referring to Figure 4 shown, the pressing steel sheet 2 includes a steel sheet main body 21 and a support boss 22 formed by stamping from one side surface of the steel sheet main body 21 towards the other side surface. The support boss 22 protrudes from the surface of the steel sheet main body 21 to form a first support surface 221, and the surface of the steel sheet main body 21 facing away from the first support surface 221 forms a second support surface 211. One of the first support surface 221 and the second support surface 211 abuts against the side key module 1, and the other abuts against the groove wall of the side key groove 301.

[0049] With such a setting, the overall thickness of the pressing steel sheet 2 can be increased, that is, the overall thickness of the pressing steel sheet 2 in the direction perpendicular to the insertion direction can be increased, so that after the pressing steel sheet 2 is inserted into the side key groove 301, a horizontal pressing force towards the silica gel member 13 can be applied to the side key module 1; and the thickness of the peripheral edge of the pressing steel sheet 2 is less than its overall thickness in the direction perpendicular to the insertion direction, that is, the thickness of the peripheral edge of the pressing steel sheet 2 is relatively thin, so as to facilitate the smooth insertion of the pressing steel sheet 2 from the side of the side key module 1 facing away from the silica gel member 13 into the side key groove 301; and the pressing steel sheet 2 set in this way has a light weight, which is beneficial to the lightweight of the side key structure.

[0050] It should be noted that in specific implementation, it can be that the first support surface 221 abuts against the groove wall of the side key groove 301, and the second support surface 211 abuts against the side key module 1; or it can be that the first support surface 221 abuts against the side key module 1, and the second support surface 211 abuts against the groove wall of the side key groove 301.

[0051] Of course, the specific structure of the pressing steel sheet 2 is not limited to the above definition. The pressing steel sheet 2 can also adopt a relatively thick steel sheet structure. For the convenience of assembly, a guiding inclined surface or other structures can be provided at the insertion end of the pressing steel sheet 2 to guide the pressing steel sheet 2 to be smoothly inserted into the side key groove 301.

[0052] In some embodiments, referring to Figures 2 to 5 as shown, the silicone part 13 is an integrally injection-molded structure. The silicone part 13 arranged in this way has a simple structure and is convenient for processing.

[0053] In other embodiments, referring to Figure 6 and Figure 7 as shown, the silicone part 13 is a two-color injection-molded structure. The silicone part 13 includes a silicone main body 132 and a secondary injection-molded body 133 connected to the silicone main body 132. The hardness of the secondary injection-molded body 133 is greater than that of the silicone main body 132, and the secondary injection-molded body 133 is arranged close to the side key body 12. The silicone part 13 arranged in this way has a better pressing feel and is beneficial to improving the user experience effect. In specific implementation, the silicone main body 132 can adopt a common plastic material, and the secondary injection-molded body 133 can adopt a material with relatively high hardness such as TPU (i.e., thermoplastic polyurethane elastomer).

[0054] For the side key structure provided by some embodiments of the present invention, during specific assembly, referring to Figure 3 as shown, the side key module 1 is first freely assembled into the side key groove 301 formed on the terminal middle frame 3. At this time, the silicone part 13 does not interfere with the front shell plastic 32 of the terminal middle frame 3, and the silicone part 13 will not deform. Then, referring to Figure 4 as shown, the pressing steel sheet 2 is inserted into the side key groove 301 from the back of the side key module 1. The pressing steel sheet 2 applies a force perpendicular to the insertion direction to the side key module 1, so that the sealing convex part 131 on the silicone part 13 is interference-fitted with the front shell plastic 32. The interference amount can be specifically 0.2 mm, forming a circumferential seal and blocking the water inlet path, thereby achieving the sealing and waterproof effect.

[0055] Referring to Figure 5 and Figure 7 as shown, some other embodiments of the present invention provide a mobile terminal, including the side key structure as described in any of the above embodiments.

[0056] The mobile terminal provided by the embodiment of the present utility model includes the side key structure described in any one of the above embodiments, and thus has the beneficial effects of the side key structure described in any one of the above embodiments, which will not be elaborated herein. Specifically, the mobile terminal can be a mobile phone, a tablet computer, a learning machine, or any other electronic device that can adopt the above side key structure.

[0057] In some embodiments, referring to Figure 5 and Figure 7 as shown, the mobile terminal includes a terminal middle frame 3. A side key slot 301 and a keycap mounting hole 302 for mounting a keycap 33 and communicating with the side key slot 301 are provided on the terminal middle frame 3. The side key slot 301 has an opening facing the display screen 4. The side key module 1 is first freely assembled into the side key slot 301, and the silicone member 13 of the side key module 1 does not interfere with the slot wall of the side key slot 301, and the silicone member 13 will not deform. Then, the pushing steel sheet 2 is inserted into the side key slot 301 from the side of the side key module 1 facing away from the silicone member 13. The pushing steel sheet 2 applies a pressing force to the side key module 1 towards the silicone member 13, so that the sealing convex portion 131 on the silicone member 13 abuts against the slot wall of the side key slot 301 around the keycap mounting hole 302 to form interference, preventing external water from entering the side key slot 301 through the gap between the keycap 33 and the keycap mounting hole 302, thereby achieving the sealing and waterproof effect.

[0058] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0059] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A side key structure, characterized in that, It includes a side key module and a pressing member; The side key module includes a side key flexible board, a side key body, and a silica gel member. The side key body is disposed on the side key flexible board. The silica gel member is connected to the side key flexible board and seals the side key body between the silica gel member and the side key flexible board; The side key module is inserted into a side key slot formed on a terminal middle frame. The pressing member is inserted into the side key slot from a side of the side key module facing away from the silica gel member, and applies a pressing force towards the silica gel member to the side key module.

2. The side key structure according to claim 1, characterized in that, The silica gel member is bonded to a side surface of the side key flexible board where the side key body is disposed through an adhesive tape, and the adhesive tape is disposed around the side key body in a surrounding manner.

3. The side key structure according to claim 1, wherein A sealing convex portion is formed on a side of the silica gel member facing away from the side key flexible board. A keycap mounting hole for mounting a keycap and communicating with the side key slot is disposed on the terminal middle frame, and the sealing convex portion abuts and seals against a groove wall of the side key slot around the keycap mounting hole.

4. The side key structure according to claim 1, wherein The side key module further includes a metal substrate. The side key flexible board is fixed on the metal substrate, and the side key body is disposed on a side surface of the side key flexible board facing away from the metal substrate.

5. The side key structure according to any one of claims 1 to 4, characterized in that, In a direction perpendicular to the direction in which the side key module is inserted into the side key slot, the thickness of the side key module is less than the width of the side key slot.

6. The side key structure according to claim 5, wherein In a direction perpendicular to the direction in which the side key module is inserted into the side key slot, the sum of the thicknesses of the pressing member and the side key module is greater than the width of the side key slot.

7. The side key structure according to any one of claims 1 to 4, characterized in that, The pressing member is a pressing steel sheet.

8. The side key structure according to claim 7, wherein, The pressing steel sheet includes a steel sheet main body and a supporting convex platform formed by stamping from one side surface of the steel sheet main body towards the other side surface. The supporting convex platform protrudes from the surface of the steel sheet main body to form a first supporting surface. A second supporting surface is formed on a surface of the steel sheet main body facing away from the first supporting surface. One of the first supporting surface and the second supporting surface abuts against the side key module, and the other abuts against a groove wall of the side key slot.

9. The side key structure according to any one of claims 1 to 4, characterized in that, The silica gel member is an integrally injection-molded structure; Alternatively, the silica gel member is a two-color injection-molded structure. The silica gel member includes a silica gel main body and a secondary injection-molded body connected to the silica gel main body. The hardness of the secondary injection-molded body is greater than that of the silica gel main body, and the secondary injection-molded body is disposed close to the side key body.

10. A mobile terminal, characterized in that, It includes the side key structure according to any one of claims 1 to 9.

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