Mobile terminal

Abstract

The present disclosure provides a mobile terminal, belonging to the field of mobile terminal. The mobile terminal comprises a flexible circuit board, a side key and a limiting piece. The flexible circuit board has a first part, a second part and a bending part. The first part and the second part are opposite, and the bending part is connected with the first part and the second part. The side key is located on the side of the first part away from the second part and connected with the first part. The limiting piece has a protrusion. The protrusion is located on the side of the first part away from the second part and close to the bending part. In the state that the side key is popped up, the protrusion abuts against the first part. The protrusion can abut against the first part of the flexible circuit board, so that the elastic force generated by the flexible circuit board acts on the protrusion instead of the side key, thereby avoiding the side key from being skewed.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of mobile terminals, and in particular to a mobile terminal. BACKGROUND

[0002] Common fingerprint technologies for mobile terminals include under-screen fingerprint technology, rear fingerprint technology and side fingerprint technology. The under-screen fingerprint technology has limitations in that it requires a specific type of display screen for the mobile terminal. The rear fingerprint technology damages the integrity of the rear cover of the mobile terminal and is inconvenient to use. The side fingerprint technology avoids the defects of the under-screen fingerprint technology and the rear fingerprint technology and has a good application prospect.

[0003] In a mobile terminal using the side fingerprint technology, a side key is connected to a printed circuit board inside the mobile terminal through a flexible circuit board. Since a part of the flexible circuit board is in a bent state, the elasticity of the bent part will push the side key, thus easily causing the side key to be skewed. SUMMARY

[0004] The embodiments of the present disclosure provide a mobile terminal, which can avoid skewing of a side key of the mobile terminal. The technical solutions are as follows:

[0005] The embodiments of the present disclosure provide a mobile terminal, which includes a flexible circuit board, a side key and a limiting piece.

[0006] The flexible circuit board has a first part, a second part and a bent part, the first part and the second part are opposite to each other, and the bent part is connected to the first part and the second part.

[0007] The side key is located on a side of the first part away from the second part and is connected to the first part.

[0008] The limiting piece has a protrusion, the protrusion is located on a side of the first part away from the second part and is close to the bent part, and in a state where the side key is popped up, the protrusion abuts against the first part.

[0009] In a possible implementation manner of the embodiments of the present disclosure, in the state where the side key is popped up, a surface of the protrusion close to the first part is flush with a surface of the side key close to the first part.

[0010] In a possible implementation manner of the embodiments of the present disclosure, the distance from the protrusion to two side edges in the width direction of the first part is equal.

[0011] In a possible implementation of the embodiment of the present disclosure, the first part comprises a flexible body and a reinforcing piece, the reinforcing piece is located on one side of the flexible body and connected with the flexible body, and the reinforcing piece is close to the protrusion and abuts against the protrusion.

[0012] In a possible implementation of the embodiment of the present disclosure, the protrusion is formed by stamping.

[0013] Optionally, the mobile terminal further comprises a middle frame, the middle frame has a receiving groove and a side key mounting hole, the receiving groove has a first side wall and a second side wall, the first side wall is close to the outer side of the middle frame, the second side wall is close to the inner side of the middle frame, and the side key mounting hole is located on the first side wall.

[0014] The first part, the second part and the bending part are located in the receiving groove, the first part has a gap with the first side wall, and the second part abuts against the second side wall.

[0015] The side key is movably inserted into the side key mounting hole and partially located in the receiving groove.

[0016] The limiting piece abuts against the inner side wall of the receiving groove, and the protrusion is located in the gap.

[0017] In a possible implementation of the embodiment of the present disclosure, the side key has a limiting hole, and the limiting hole extends along the depth direction of the receiving groove.

[0018] The limiting piece has a first abutting part, a second abutting part, a limiting part and a connecting part, the first abutting part is connected with one end of the connecting part, the second abutting part is connected with the other end of the connecting part, and the limiting part is located between the first abutting part and the second abutting part and connected with the connecting part.

[0019] The first abutting part and the second abutting part are located on opposite sides of the side key, the connecting part is located on the side of the side key away from the groove bottom of the receiving groove, and the limiting part is inserted into the limiting hole.

[0020] In a possible implementation of the embodiment of the present disclosure, one end of the limiting part away from the connecting part protrudes out of the limiting hole, and the part of the limiting part protruding out of the limiting hole is bent away from the first side wall.

[0021] Optionally, the limiting piece further has a supporting part, the supporting part is connected with the connecting part and extends towards the second side wall.

[0022] Optionally, the second side wall has a protrusion, the protrusion is located at one side of the support part close to the bottom of the accommodating groove, and the protrusion is in contact with the side of the support part close to the bottom of the accommodating groove.

[0023] Optionally, the protrusion has two protrusions, the two protrusions are spaced apart, and each is in contact with the support part.

[0024] The support part has a gap, and the gap is located between the two protrusions.

[0025] The technical scheme provided by the embodiments of the present disclosure has at least the following beneficial effects:

[0026] Since the limiting piece has a protrusion, the protrusion is located at one side of the first part of the flexible circuit board away from the second part and close to the bent part of the flexible circuit board, and the first part of the flexible circuit board is resisted, so that the elastic force generated by the flexible circuit board acts on the protrusion and not on the side key, thereby avoiding the side key from being skewed. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 is a structural schematic diagram of a middle frame of a mobile terminal in the related art;

[0029] Figure 2 is an exploded structural schematic diagram of a mobile terminal in the related art;

[0030] Figure 3 is a partial structural schematic diagram of a mobile terminal in the related art;

[0031] Figure 4 is a structural schematic diagram of a mobile terminal provided by an embodiment of the present disclosure;

[0032] Figure 5 is an exploded structural schematic diagram of a mobile terminal provided by an embodiment of the present disclosure;

[0033] Figure 6 is an assembly process schematic diagram of a mobile terminal provided by an embodiment of the present disclosure;

[0034] Figure 7 is an assembly process schematic diagram of a mobile terminal provided by an embodiment of the present disclosure;

[0035] Figure 8is an assembly schematic diagram of a side key and a flexible circuit board provided by the embodiment of the present disclosure;

[0036] Figure 9 is an assembly process schematic diagram of a limiting piece, a side key and a flexible circuit board;

[0037] Figure 10 is a partial structure schematic diagram of a mobile terminal provided by the embodiment of the present disclosure;

[0038] Figure 11 is a cooperation schematic diagram of a limiting piece and a flexible circuit board provided by the embodiment of the present disclosure;

[0039] Figure 12 is a structure schematic diagram of a limiting piece provided by the embodiment of the present disclosure;

[0040] Figure 13 is a cooperation schematic diagram of a limiting piece and a side key provided by the embodiment of the present disclosure;

[0041] Figure 14 is Figure 10 is a sectional view of I-I in FIG. 8;

[0042] Figure 15 is a partial structure schematic diagram of a mobile terminal provided by the embodiment of the present disclosure;

[0043] Figure 16 is a partial structure schematic diagram of a mobile terminal provided by the embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in combination with the drawings.

[0045] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", "third", and the like, as used in the description and the claims of this disclosure do not have any specific meaning, and are used only to distinguish a particular element from another. Similarly, the terms "one", "another", and the like, do not limit the quantity of the mentioned objects to one. The terms "comprising", "including", and the like, mean that the elements listed after the term encompass the elements recited and not exclude other elements. The terms "connected" and "coupled" do not limit the manner in which the elements are connected or coupled together, and can include the connection or coupling of the elements directly or indirectly, and can include electrical connections or couplings. The terms "upper", "lower", "left", "right", and the like, are used only to indicate relative positions, and can change when the absolute positions of the described objects change.

[0046] The middle frame 10 is a part of a housing of a mobile terminal. Taking a mobile phone as an example, the middle frame 10 constitutes a side wall of the mobile phone, and the middle frame 10 has some through holes for mounting corresponding structures, such as a volume key, a power key, a charging interface, and the like. Figure 1 is a structural schematic diagram of a middle frame of a mobile terminal in the related art. As shown in Figure 1 , the middle frame 10 has a receiving groove 101 and a side key mounting hole 102, the receiving groove 101 has a first side wall 101a and a second side wall 101b, and the side key mounting hole 102 is located at the first side wall 101a.

[0047] A mobile terminal using a side fingerprint technology in the related art includes Figure 1 the middle frame 10 shown in . Figure 2 is an exploded structural schematic diagram of a mobile terminal in the related art. Figure 2 The structure near the receiving groove 101 of the middle frame 10 is shown in . Figure 2 As shown in , the mobile terminal further includes a side key 20, a flexible circuit board 30, and a limiting piece 40. Figure 3 is a partial structural schematic diagram of a mobile terminal in the related art. Figure 3 The left diagram in is a state before the limiting piece 40 is mounted to the receiving groove 101, Figure 3 The right diagram in is a state after the limiting piece 40 is mounted to the receiving groove 101.

[0048] The side button 20 is inserted into the side button mounting hole 102, and a portion of it extends into the receiving groove 101. The flexible circuit board 30 is located partly in the receiving groove 101 and partly outside the receiving groove 101. The part located in the receiving groove 101 is connected to the side button 20, and the part located outside the receiving groove 101 is used to connect with the printed circuit board and other structures inside the mobile terminal.

[0049] The side button 20 integrates a fingerprint module. When the side button 20 is pressed, it triggers a switch 50 located in the receiving groove 101. This switch 50 controls the fingerprint module; when triggered, the fingerprint module operates, and when the side button 20 is released, the fingerprint module stops operating. A limiting member 40 engages with the portion of the side button 20 that extends into the receiving groove 101 to limit the displacement range of the side button 20 and prevent it from falling out of the side button mounting hole 102.

[0050] like Figure 3 As shown in the dashed box, in the receiving groove 101, the flexible circuit board 30 is bent into a U-shape, having a first part 31, a second part 32 and a bent part 33. This results in the flexible circuit board 30 exerting a force on the side button 20, which pushes the part of the side button 20 near the bent area of ​​the flexible circuit board 30 out in the direction of the arrow, causing the side button 20 to tilt.

[0051] Figure 4 This is a schematic diagram of the structure of a mobile terminal provided in an embodiment of this disclosure. The mobile terminal may be, but is not limited to, a mobile phone or a tablet computer. This embodiment of the disclosure uses a mobile phone as an example. Figure 4 As shown, the mobile terminal includes a side button 20, a flexible circuit board 30, and a limiting member 40.

[0052] Figure 5 This is an exploded structural diagram of a mobile terminal provided in an embodiment of this disclosure. The side button 20, the flexible circuit board 30, and the limiting member 40 are all located in the middle frame 10 of the mobile terminal. Figure 5 The middle frame 10 is shown in the diagram. Figure 4 The portion within the rectangular frame. For example... Figure 5 As shown, the middle frame 10 has a receiving groove 101 and a side key mounting hole 102. The receiving groove 101 has a first side wall 101a and a second side wall 101b. The first side wall 101a is close to the outer side of the middle frame 10, and the second side wall 101b is close to the inner side of the middle frame 10. The side key mounting hole 102 is located on the first side wall 101a. Figure 6 and Figure 7 This is a schematic diagram of the assembly process of a mobile terminal provided in an embodiment of this disclosure. Figure 6 The image shows the state after the flexible circuit board 30 is installed into the middle frame 10. Figure 7The middle frame 10, the side key 20, the flexible circuit board 30 and the limiting member 40 are assembled as shown in the middle. As shown in the middle Figure 7 The side key 20 is movably inserted into the side key mounting hole 102, and the limiting member 40 is located in the accommodating groove 101 and attached to the inner wall of the accommodating groove 101. The limiting member 40 is used to cooperate with the side key 20 to limit the displacement range of the side key 20 in the pressing direction. Figure 8 The middle frame 10, the side key 20, the flexible circuit board 30 and the limiting member 40 are assembled as shown in the middle. As shown in the middle Figure 8 In order to show the relationship between the side key 20 and the accommodating groove 101, and the relationship between the flexible circuit board 30 and the accommodating groove 101, the first side wall 101a and the second side wall 101b of the accommodating groove 101 are shown in dashed lines in the middle. Figure 8 As shown in the middle, the flexible circuit board 30 has a first part 31, a second part 32 and a bending part 33, and the first part 31, the second part 32 and the bending part 33 are located in the accommodating groove 101. The first part 31 of the flexible circuit board 30 has a gap A with the first side wall 101a, and the second part 32 is attached to the second side wall 101b. The flexible circuit board 30 also has a third part 34 connected to the second part 32, and the third part 34 is located outside the accommodating groove 101, and the third part 34 is used to connect with other devices in the mobile terminal, such as the printed circuit board.

[0053] The first part 31 and the second part 32 of the flexible circuit board 30 are opposite, and the bending part 33 is connected to the first part 31 and the second part 32. The side key 20 is located on the side of the first part 31 away from the second part 32, and is connected to the first part 31, and part of the side key 20 is located in the accommodating groove 101.

[0054] Figure 9 The middle frame 10, the side key 20, the flexible circuit board 30 and the limiting member 40 are assembled as shown in the middle. As shown in the middle Figure 9 As shown in the middle, the limiting member 40 has a protrusion 401, and the protrusion 401 is located on the side of the first part 31 away from the second part 32, and is close to the bending part 33. Figure 10 The middle frame 10, the side key 20, the flexible circuit board 30 and the limiting member 40 are assembled as shown in the middle. As shown in the middle Figure 10 In the middle, the protrusion 401 of the limiting member 40 is shown in dashed lines. As shown in the middle Figure 10 As shown in the middle, in the state that the side key 20 is popped up, the protrusion 401 abuts against the first part 31 of the flexible circuit board 30.

[0055] The protrusion of the limiting member is located on the side of the first part of the flexible circuit board away from the second part and close to the bending part of the flexible circuit board, and can abut against the first part of the flexible circuit board, so that the elastic force generated by the flexible circuit board acts on the protrusion instead of the side key, thereby avoiding the side key from being skewed.

[0056] The first part 31 of the flexible circuit board 30 is attached to the side of the side key 20 close to the second side wall 101b of the accommodating groove 101, and the bending part 33 of the flexible circuit board 30 is bent towards the second side wall 101b of the accommodating groove 101, so that the first part 31, the second part 32 and the bending part 33 form a U-shaped structure. The protrusion 401 of the limiting member 40 abuts against the first part 31 close to the bending part 33, and the elastic force generated by the bending part 33 of the flexible circuit board 30 directly acts on the protrusion 401 without affecting the side key 20.

[0057] The side of the side key 20 close to the second side wall 101b of the accommodating groove 101 is provided with a protruding nail 201, and the first part 31 of the flexible circuit board 30 is provided with a positioning hole 30a, the protruding nail 201 is inserted into the positioning hole 30a to limit the flexible circuit board 30 and prevent the flexible circuit board 30 from loosening.

[0058] As shown in Figure 10 , the surface of the first part 31 of the flexible circuit board 30 away from the side key 20 is connected with an elastic pad 60, which can provide elastic force for the reset of the side key 20. When the side key 20 is pressed, the elastic pad 60 contacts the second side wall 101b of the accommodating groove 101 and is deformed by extrusion, and when the side key 20 is released, the elastic pad 60 returns to push the side key 20 to pop up.

[0059] Exemplarily, the material of the elastic pad 60 is at least one of rubber, foam and aerogel.

[0060] As shown in Figure 10 , the first part 31 of the flexible circuit board 30 includes a flexible body 301 and a reinforcing member 302. The reinforcing member 302 is located on one side of the flexible body 301 and connected with the flexible body 301. The reinforcing member 302 is close to the protrusion 401, and the protrusion 401 abuts against the reinforcing member 302.

[0061] The flexible body 301 is relatively soft, and the reinforcing member 302 is used to increase the strength of the local part of the flexible circuit board 30. The protrusion 401 abuts against the reinforcing member 302, which can prevent the protrusion 401 from causing local deformation of the flexible circuit board 30, such as a pit on the surface of the flexible circuit board 30.

[0062] As shown in Figure 10As shown, when the side button 20 is in the pop-up state, the surface of the protrusion 401 near the first part 31 is flush with the surface 20a of the side button 20 near the first part 31.

[0063] The first portion 31 of the flexible circuit board 30 is connected to the side button 20. When the side button 20 is in the pop-up state, it abuts against the protrusion 401. The first portion 31 of the flexible circuit board 30 is parallel to the first side wall 101a of the receiving groove 101, and is perpendicular to the pressing direction of the side button 20, keeping the side button 20 stable. If the protrusion 401 protrudes too much, it will cause the first portion 31 of the flexible circuit board 30 to tilt, pulling the side button 20 towards the second side wall 101b of the receiving groove 101. Figure 10 The upper end of the button 20 is pulled towards the second side wall 101b of the receiving groove 101, causing the side button 20 to tilt to a certain extent. Therefore, the surface of the protrusion 401 near the second side wall 101b of the receiving groove 101 is flush with the surface of the side button 20 near the second side wall 101b when the side button 20 is popped up, which can further improve the stability of the side button 20.

[0064] Figure 11 This is a schematic diagram of the interaction between the limiting member and the flexible circuit board provided in the embodiments of this disclosure. Figure 11 correspond Figure 10 The left-hand perspective in the image. For example... Figure 11 As shown, the distances from the protrusion 401 to the two sides of the first part 31 in the width direction are equal. That is, the distance d1 from the protrusion 401 to the side of the first part 31 near the bottom of the receiving groove 101 is equal to the distance d2 from the protrusion 401 to the side of the first part 31 away from the bottom of the receiving groove 101. This ensures that the force exerted by the protrusion 401 on the flexible circuit board 30 is applied at the middle position of the flexible circuit board 30, which refers to the middle position in the depth direction of the receiving groove 101, thus preventing the flexible circuit board 30 from undergoing torsional deformation. For example, if the protrusion 401 is closer to the side of the first part 31 away from the bottom of the receiving groove 101, making the distance d2 less than the distance d1, then after the protrusion 401 abuts against the first part 31 of the flexible circuit board 30, under the elastic action of the flexible circuit board 30, the first part 31 of the flexible circuit board 30 will undergo torsional deformation, and the side of the first part 31 near the bottom of the receiving groove 101 will be closer to the first sidewall 101a of the receiving groove 101.

[0065] Reference Figure 10The side key 20 has a limiting hole 20b extending along the depth direction of the accommodating groove 101. The limiting hole 20b is partially located in the accommodating groove 101 and partially located in the side key mounting hole 102. With the side key 20 being pressed, the part of the limiting hole 20b located in the side key mounting hole 102 also gradually enters the accommodating groove 101. The limiting hole 20b is used to form a cooperation with the limiting piece 40, limit the displacement range of the side key 20, and prevent the side key 20 from falling out of the side key mounting hole 102.

[0066] As an example, in the embodiment of the present disclosure, the side key 20 has two limiting holes 20b, and the two limiting holes 20b respectively form a cooperation with the limiting piece 40.

[0067] Figure 12 is a structural schematic diagram of a limiting piece provided by the embodiment of the present disclosure. As shown in Figure 12 , the limiting piece 40 has a first abutting part 41, a second abutting part 42, a limiting part 43, and a connecting part 44. The first abutting part 41 is connected with one end of the connecting part 44, and the second abutting part 42 is connected with the other end of the connecting part 44. The limiting part 43 is located between the first abutting part 41 and the second abutting part 42 and is connected with the connecting part 44.

[0068] The first abutting part 41 of the limiting piece 40 is in a U shape, one part of which is abutted with the first side wall 101a of the accommodating groove 101, and the other part of which is abutted with the second side wall 101b of the accommodating groove 101. The first abutting part 41 is close to the bending part 33 of the flexible circuit board 30, and the protrusion 401 is located in the first abutting part 41. The second abutting part 42 of the limiting piece 40 is also in a U shape, one part of which is abutted with the first side wall 101a of the accommodating groove 101, and the other part of which is abutted with the second side wall 101b of the accommodating groove 101. Both the two abutting parts are bent in a U shape and have a certain elasticity, which can be tightly abutted with the first side wall 101a and the second side wall 101b of the accommodating groove 101, so that the limiting piece 40 remains stable.

[0069] Figure 13 is a cooperation schematic diagram of the limiting piece and the side key provided by the embodiment of the present disclosure. As shown in Figure 13 , the first abutting part 41 and the second abutting part 42 are located on the opposite sides of the side key 20. The connecting part 44 is located on the side of the side key 20 away from the groove bottom of the accommodating groove 101, and the limiting part 43 is inserted in the limiting hole 20b.

[0070] When the side key 20 is in the pop-up state, the inner wall of the limiting hole 20b is abutted with the side of the limiting part 43 close to the second side wall 101b of the accommodating groove 101. Under the cooperation of the limiting hole 20b and the limiting part 43, the maximum displacement of the side key 20 pop-up out of the side key mounting hole 102 is limited, and the side key 20 is prevented from falling out of the side key mounting hole 102.

[0071] For example, in this embodiment of the present disclosure, the limiting member 40 has two limiting parts 43, which correspond one-to-one with two limiting holes 20b. The two limiting parts 43 and the two limiting holes 20b respectively form a cooperation, which can make the side button 20 more stable.

[0072] Figure 14 yes Figure 10 Cross-sectional view at point I-I. Figure 14 The image also shows a limiting element 40. (For example...) Figure 14 As shown, the limiting part 43 of the limiting member 40 extends out of the limiting insertion hole 20b at one end away from the connecting part 44, and the portion of the limiting part 43 extending out of the limiting insertion hole 20b bends away from the first side wall 101a of the receiving groove 101.

[0073] When installing the limiting member 40, the limiting member 40 is placed into the receiving groove 101 along the depth direction of the receiving groove 101. The limiting part 43 of the limiting member 40 first slides against the first side wall 101a of the receiving groove 101 towards the bottom of the receiving groove 101. After the limiting part 43 passes through the limiting insertion hole 20b of the side button 20, it continues to slide along the first side wall 101a of the receiving groove 101 towards the bottom of the receiving groove 101. During the installation process, if the limiting member 40 is slightly tilted, the limiting part 43, after passing through the side button 20, may extend into the side button mounting hole 102, causing the limiting part 43 to hit the inner side wall of the side button mounting hole 102 and deform, affecting the normal installation of the limiting member 40. By making the part of the limiting part 43 extending out of the limiting insertion hole 20b into a bent form, the possibility of the limiting part 43 extending into the side button mounting hole 102 can be reduced, making the installation of the limiting member 40 easier.

[0074] like Figure 14 As shown, the end of the limiting part 43 away from the connecting part 44 abuts against the bottom of the receiving groove 101, thereby limiting the limiting member 40 in the depth direction of the receiving groove 101 by the limiting part 43, so that the limiting member 40 is installed more stably in the receiving groove 101.

[0075] Optionally, the limiting member 40 is a stamped part, formed integrally by stamping, suitable for mass production, and has low cost and high production efficiency. The protrusion 401 is formed by stamping. When stamping the limiting member 40, a recess is stamped in the part where the first mating part 41 is connected to the connecting part 44, thereby forming the protrusion 401 on the other side.

[0076] For example, a steel sheet is stamped to produce the limiting member 40. The steel sheet has high strength and toughness, and the first fitting part 41 and the second fitting part 42 can generate a large elastic force to adhere tightly to the inner wall of the receiving groove 101, preventing the limiting member 40 from loosening.

[0077] As shown in Figure 14 The limiting member 40 also has a supporting part 45. The supporting part 45 is connected with the connecting part 44 and extends towards the second side wall 101b.

[0078] Figure 15 is a schematic diagram of a partial structure of a mobile terminal provided by an embodiment of the present disclosure. As shown in Figure 15 When assembling the mobile terminal, a sealing gasket 70 is usually used to seal the accommodating groove 101. After sealing, the surface of the sealing gasket 70 is flush with the outer surface of the middle frame 10. In the related art, because the accommodating groove 101 lacks support for the sealing gasket 70, the sealing gasket 70 is prone to sinking into the accommodating groove 101 under the pressing of external force. If the sealing gasket 70 sunk into the accommodating groove 101 is stuck between the side key 20 and the second side wall 101b of the accommodating groove 101, the normal pressing of the side key 20 will be affected. In the embodiment of the present disclosure, the supporting part 45 of the limiting member 40 can provide support for the subsequently installed sealing gasket 70, thereby preventing the sealing gasket 70 from sinking into the accommodating groove 101 and avoiding the sealing gasket 70 from being stuck between the side key 20 and the second side wall 101b of the accommodating groove 101.

[0079] Exemplarily, the sealing gasket 70 is a silica gel sealing gasket.

[0080] Figure 16 is a schematic diagram of a partial structure of a mobile terminal provided by an embodiment of the present disclosure, Figure 16 The limiting member 40 is omitted in the embodiment. As shown in Figure 16 The second side wall 101b of the accommodating groove 101 has a boss 1011. In combination with Figure 13 The boss 1011 is located on the side of the supporting part 45 close to the groove bottom of the accommodating groove 101, and the boss 1011 contacts the side of the supporting part 45 close to the groove bottom of the accommodating groove 101.

[0081] The boss 1011 of the second side wall 101b of the accommodating groove 101 provides support for the end of the supporting part 45 away from the connecting part 44, which can make the installation of the limiting member 40 more stable and avoid the limiting member 40 from being skewed when the sealing gasket 70 is pressed by external force.

[0082] In addition, the boss 1011 is also used to contact the elastic pad 60. The elastic pad 60 on the flexible circuit board 30 is directly opposite the boss 1011, and the elastic pad 60 deforms after contacting the boss 1011 when the side key 20 is pressed. The boss 1011 can also limit the maximum displacement of the side key 20 when pressed. When the side key 20 is pressed, even if the thickness of the deformed elastic pad 60 is ignored, the side key 20 can only be pressed to the point where the first part 31 of the flexible circuit board 30 contacts the boss 1011.

[0083] As shown in Figure 16As shown, the boss 1011 has two, two boss 1011 interval distribution, and are in contact with the support part 45. By the two boss 1011 interval distribution to provide support, make the support part 45 more stable.

[0084] Correspondingly, the flexible circuit board 30 corresponding to the connection has two elastic pads 60, two elastic pads 60 and two boss 1011 one to one.

[0085] As shown Figure 15 The support part 45 has a notch 45a between the two bosses 1011. In the assembly of the mobile terminal, it is usually installed in the accommodation groove 101 other components are installed, and then install the limit piece 40, and finally install the sealing pad 70. When installing the limit piece 40, it is usually necessary to press the side key 20, so that the limiting part 43 of the limit piece 40 is inserted into the limiting hole 20b of the side key 20, and the side key 20 is released after the limit piece 40 is installed in place. The gap 45a can be used to observe the components between the side key 20 and the second side wall 101b of the accommodation groove 101, to ensure that the assembly relationship between the components meets the design requirements.

[0086] As shown Figure 16 The accommodation groove 101 also accommodates a switch device 50, which is located on the surface of the first part 31 of the flexible circuit board 30 close to the second side wall 101b. During the pressing of the side key 20, the switch device 50 gradually approaches the second side wall 101b of the accommodation groove 101 under the action of the side key 20, and after contacting the second side wall 101b of the accommodation groove 101, the switch device 50 is triggered by pressing. When the side key 20 is released, the side key 20 rebounds, the switch device 50 separates from the second side wall 101b of the accommodation groove 101, and the switch device 50 is closed. In order to accurately trigger the switch device 50 when pressing the side key 20, without damaging the switch device 50 due to excessive pressure, the gap between the switch device 50 and the second side wall 101b of the accommodation groove 101 needs to meet certain design requirements when the side key 20 is in the rebound state. The gap between the switch device 50 and the second side wall 101b of the accommodation groove 101 in the rebound state of the side key 20 can be easily observed by the notch 45a on the support part 45.

[0087] Optionally, the second side wall 101b of the accommodating groove 101 is connected with a flexible gasket 80. When the switch device 50 directly contacts the second side wall 101b of the accommodating groove 101, the switch device 50 can be damaged due to the hard material of the middle frame 10. By arranging the flexible gasket 80, when the side key 20 is pressed, the switch device 50 indirectly contacts the second side wall 101b of the accommodating groove 101 through the flexible gasket 80 without direct contact, and the flexible gasket 80 plays a buffering role, thereby reducing the possibility of damage to the switch device 50 and prolonging the service life of the switch device 50. After arranging the flexible gasket 80, the gap between the switch device 50 and the flexible gasket 80 in the side key 20 in the pop-up state can be conveniently observed through the gap 45a on the support portion 45.

[0088] Exemplarily, the flexible gasket 80 is made of thermoplastic polyurethane elastomer rubber.

[0089] The above description is only optional embodiments of the present disclosure and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A mobile terminal, characterized in that, It includes a flexible circuit board (30), a side button (20), a middle frame (10), and a limiting member (40); The flexible circuit board (30) has a first part (31), a second part (32) and a bent part (33), the first part (31) and the second part (32) are opposite to each other, and the bent part (33) is connected to the first part (31) and the second part (32); The side button (20) is located on the side of the first part (31) away from the second part (32) and is connected to the first part (31); The limiting member (40) has a protrusion (401) located on the side of the first part (31) away from the second part (32) and close to the bent part (33). When the side button (20) is popped up, the protrusion (401) abuts against the first part (31). The middle frame (10) has a receiving groove (101) and a side key mounting hole (102). The receiving groove (101) has a first side wall (101a) and a second side wall (101b). The first side wall (101a) is close to the outer side of the middle frame (10), and the second side wall (101b) is close to the inner side of the middle frame (10). The side key mounting hole (102) is located on the first side wall (101a). The first part (31), the second part (32) and the bent part (33) are located in the receiving groove (101), the first part (31) has a gap (A) with the first sidewall (101a), and the second part (32) is in contact with the second sidewall (101b); The side button (20) is movably inserted into the side button mounting hole (102) and partially located in the receiving groove (101); The limiting member (40) is in contact with the inner wall of the receiving groove (101), and the protrusion (401) is located in the gap (A).

2. The mobile terminal according to claim 1, characterized in that, When the side button (20) is in the popped-up state, the surface of the protrusion (401) near the first part (31) is flush with the surface of the side button (20) near the first part (31).

3. The mobile terminal according to claim 1, characterized in that, The distance from the protrusion (401) to the two sides of the first part (31) in the width direction is equal.

4. The mobile terminal according to claim 1, characterized in that, The first part (31) includes a flexible body (301) and a reinforcing member (302). The reinforcing member (302) is located on one side of the flexible body (301) and connected to the flexible body (301). The reinforcing member (302) is close to the protrusion (401), and the protrusion (401) abuts against the reinforcing member (302).

5. The mobile terminal according to any one of claims 1 to 4, characterized in that, The protrusion (401) is formed by stamping.

6. The mobile terminal according to claim 1, characterized in that, The side button (20) has a limiting socket (20b) that extends along the depth direction of the receiving groove (101); The limiting member (40) has a first fitting part (41), a second fitting part (42), a limiting part (43), and a connecting part (44). The first fitting part (41) is connected to one end of the connecting part (44), the second fitting part (42) is connected to the other end of the connecting part (44), and the limiting part (43) is located between the first fitting part (41) and the second fitting part (42) and is connected to the connecting part (44). The first fitting part (41) and the second fitting part (42) are located on opposite sides of the side button (20), the connecting part (44) is located on the side of the side button (20) away from the bottom of the receiving groove (101), and the limiting part (43) is inserted into the limiting hole (20b).

7. The mobile terminal according to claim 6, characterized in that, The end of the limiting part (43) away from the connecting part (44) extends out of the limiting hole (20b), and the portion of the limiting part (43) extending out of the limiting hole (20b) bends away from the first sidewall (101a).

8. The mobile terminal according to claim 6, characterized in that, The limiting member (40) also has a support portion (45) connected to the connecting portion (44) and extending toward the second sidewall (101b).

9. The mobile terminal according to claim 8, characterized in that, The second sidewall (101b) has a boss (1011) located on the side of the support (45) near the bottom of the receiving groove (101), and the boss (1011) contacts the side of the support (45) near the bottom of the receiving groove (101).

10. The mobile terminal according to claim 9, characterized in that, There are two bosses (1011), which are spaced apart and both are in contact with the support (45); The support (45) has a notch (45a) located between the two bosses (1011).

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