Side fingerprint protection structure and smart phone

Abstract

The utility model discloses a side edge fingerprint protection structure and an intelligent mobile phone, and the structure comprises a housing, and the side edge of the housing is provided with an accommodation groove for placing a fingerprint module; the fingerprint module is sequentially provided with a fingerprint side key, a fingerprint flexible circuit board, an elastic body and a power supply assembly in the direction that the opening of the containing groove faces inwards. The fingerprint flexible circuit board is electrically connected with the fingerprint side key and the power supply assembly. A fingerprint touch surface of the fingerprint side key is higher than or flush with an opening of the accommodating groove; the side face of the fingerprint side key is continuously provided with at least one circle of first elastic protruding blocks in a closed ring shape in the circumferential direction, and the tops of the first elastic protruding blocks are tightly attached to the side walls of the corresponding containing grooves. According to the fingerprint module, at least one circle of first elastic convex block is arranged on the side surface of the fingerprint side key along the circumferential direction, and the first elastic convex block is tightly attached to the side wall of the corresponding accommodating groove to prevent external small molecule impurities or moisture from entering the accommodating groove, so that the protection performance of the fingerprint module is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to telephone communication technical field especially relates to a side edge fingerprint protection structure and intelligent mobile phone. BACKGROUND

[0002] The existing intelligent equipment (such as mobile phone, tablet computer etc.) with fingerprint unlocking, the fingerprint unlocking assembly is generally arranged on the front or side edge of the equipment.When the fingerprint unlocking assembly is arranged on the side edge of the mobile phone, the side edge of the mobile phone is recessed inward to form a containing groove for placing the fingerprint unlocking assembly, and the containing groove is protected at the position corresponding to the connection between the fingerprint unlocking assembly and the mainboard inside the mobile phone to prevent small molecular impurities and water from the outside entering the inside of the mobile phone through the containing groove.

[0003] The fingerprint key of the fingerprint unlocking assembly is higher than or flush with the opening of the containing groove, and the fingerprint unlocking assembly is also integrated with the power key function, that is, pressing the fingerprint key can wake up the screen, and long-pressing the fingerprint key can turn the equipment on / off, but when the user presses the fingerprint key, a gap is formed between the fingerprint key and the containing groove, at this time, small molecular impurities and water from the outside will enter the containing groove through the gap, thereby affecting the normal operation of the electronic components in the fingerprint unlocking assembly.

[0004] To solve this problem, the existing technology generally seals the electronic components in the fingerprint unlocking assembly one by one by using glue to avoid the influence of small molecular impurities or water from the outside on the work of the fingerprint unlocking assembly. However, because the electronic components in the fingerprint unlocking assembly are small, it is time-consuming and laborious to protect them individually, and the production cost is high; and if the glue is exposed to high temperature, high humidity or ultraviolet environment for a long time, the glue may become brittle, shrink or delaminate, resulting in a decrease in protection performance.

[0005] Therefore, how to provide a side edge fingerprint independent protection structure with better protection performance is a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0006] The utility model provides a kind of side edge fingerprint protection structure and intelligent mobile phone, to solve the problem of poor protection performance of fingerprint unlocking assembly in prior art.

[0007] The technical scheme of the utility model is a kind of side edge fingerprint protection structure, comprising:

[0008] Shell, the side edge of the shell is provided with the containing groove for placing fingerprint module group;

[0009] The fingerprint module group is sequentially provided with fingerprint side key, fingerprint flexible circuit board, elastomer and power assembly along the direction of the containing groove opening inward;The fingerprint flexible circuit board is electrically connected with the fingerprint side key and the power assembly respectively;

[0010] The fingerprint touch surface of the fingerprint side key is higher than or flush with the opening of the accommodating groove; and the side surface of the fingerprint side key is continuously provided with at least one circle of first elastic protrusions forming a closed ring in the circumferential direction, and the top of the first elastic protrusion is tightly attached to the side wall of the corresponding accommodating groove.

[0011] Further, the edge of the side of the fingerprint side key towards the fingerprint flexible circuit board is outwardly surrounded by a stepped portion, the side of the stepped portion away from the side of the fingerprint flexible circuit board is continuously provided with at least one circle of second elastic protrusions forming a closed ring in the circumferential direction, and the top of the second elastic protrusion is tightly attached to the side wall of the corresponding accommodating groove.

[0012] Further, the side of the stepped portion is continuously provided with at least one circle of third elastic protrusions forming a closed ring in the circumferential direction, and the top of the third elastic protrusion is tightly attached to the side wall of the corresponding accommodating groove.

[0013] Further, the top of the first elastic protrusion, the second elastic protrusion and the third elastic protrusion is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape.

[0014] Further, the edge of the side of the fingerprint side key towards the fingerprint flexible circuit board is outwardly surrounded by a stepped portion, the side of the stepped portion away from the side of the fingerprint flexible circuit board is continuously provided with at least one circle of second elastic protrusions forming a closed ring in the circumferential direction, and the top of the second elastic protrusion is tightly attached to the side wall of the corresponding accommodating groove.

[0015] The side of the fingerprint flexible circuit board towards the fingerprint side key is continuously provided with a clamping block corresponding to the clamping groove, and the clamping block can be matched and embedded into the corresponding clamping groove to form an interference fit.

[0016] Further, the opposite connecting surfaces of the fingerprint side key and the fingerprint flexible circuit board are coated with a protective glue layer through a dispensing process.

[0017] Further, the elastic body is bonded to the fingerprint flexible circuit board through a bonding layer.

[0018] Further, the power supply assembly comprises a tactile switch and a side key flexible circuit board.

[0019] The side of the elastic body away from the fingerprint flexible circuit board is sequentially connected with the tactile switch and the side key flexible circuit board; the side key flexible circuit board is electrically connected with the fingerprint side key, the fingerprint flexible circuit board and the tactile switch respectively; and the side key flexible circuit board is used for connecting the mainboard of the smart phone.

[0020] The utility model also provides a smart phone, the side of the smart phone includes the side edge fingerprint protection structure.

[0021] Compared with the prior art, the utility model has at least the following beneficial effects:

[0022] The utility model discloses a first elastic lug is arranged on the side of the fingerprint side key, and the first elastic lug prevents the small molecule impurity or moisture from entering the containing groove by closely attaching to the corresponding containing groove side wall, thereby improving the protection performance of the fingerprint module. BRIEF DESCRIPTION OF DRAWINGS

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs; the terms used in the specification of the application are only for the purpose of describing the specific embodiments and are not intended to limit the utility model; the terms "include" and "have" and any variation thereof in the specification and claims of the utility model and the above drawing description are intended to cover the non-exclusive inclusion; the terms "first", "second" and the like in the specification and claims of the utility model or the above drawing are used to distinguish different objects and are not used to describe a specific sequence.

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below; obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without paying creative labor.

[0025] Figure 1 It is a sectional view of the first side edge fingerprint protection structure of the utility model;

[0026] Figure 2 It is an enlarged schematic view of reference sign A in Figure 1

[0027] Figure 3 It is another sectional view of the first side edge fingerprint protection structure of the utility model;

[0028] Figure 4 It is an enlarged schematic view of reference sign B in Figure 1

[0029] Figure 5 It is a sectional view of the second side edge fingerprint protection structure of the utility model;

[0030] Figure 6 It is a sectional view of the third side edge fingerprint protection structure of the utility model;

[0031] Figure 7 It is a sectional view of the fourth side edge fingerprint protection structure of the utility model;

[0032] Figure 8 ​​The cross-sectional view of the fifth side edge fingerprint protection structure provided by the utility model;

[0033] Figure 9 The cross-sectional view of the sixth side edge fingerprint protection structure provided by the utility model;

[0034] Figure 10 The cross-sectional view of the seventh side edge fingerprint protection structure provided by the utility model;

[0035] Figure 11 The cross-sectional view of the eighth side edge fingerprint protection structure provided by the utility model;

[0036] Figure 12 The right view of the smart phone provided by the utility model.

[0037] Reference signs:

[0038] 1, shell;

[0039] 2, accommodating groove;

[0040] 3, fingerprint module; 31, fingerprint side key; 311, fingerprint touch surface; 312, step part; 313, clamping groove; 32, fingerprint flexible circuit board; 321, clamping block; 33, elastic body; 34, power supply assembly; 341, touch switch; 342, side key flexible circuit board; 35, first elastic lug; 36, second elastic lug; 37, third elastic lug; 38, adhesive layer. Specific implementation

[0041] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and apparent, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model. Therefore, the feature indicated in the specification is used to explain one feature of one embodiment of the utility model, and is not meant to imply that each embodiment of the utility model must have the explained feature. In addition, it should be noted that the specification describes many features. Although certain features can be combined together to show possible system designs, these features can also be used in other combinations that are not explicitly explained. Therefore, unless otherwise specified, the explained combination is not intended to be limited.

[0042] The principle and structure of the utility model will be described in detail below by combining with the drawings and examples.

[0043] Example 1

[0044] As shown in Figure 1 and Figure 3 , the utility model provides a side edge fingerprint protection structure, which comprises:

[0045] The shell 1 is provided with a containing groove 2 for placing a fingerprint module 3 at the side thereof;

[0046] The fingerprint module 3 is provided with a fingerprint side key 31, a fingerprint flexible circuit board 32, an elastic body 33 and a power supply assembly 34 in sequence along the direction in which the containing groove 2 opens inwardly; the fingerprint flexible circuit board 32 is electrically connected with the fingerprint side key 31 and the power supply assembly 34 respectively;

[0047] The fingerprint touch surface 311 of the fingerprint side key 31 is higher than or flush with the opening of the containing groove 2; the side surface of the fingerprint side key 31 is continuously provided with at least one circle of first elastic bumps 35 forming a closed annular shape, and the top of the first elastic bumps 35 is in close contact with the side wall of the corresponding containing groove 2.

[0048] It can be understood that the side fingerprint protection structure according to the embodiment is applied to a smart phone, and the shell 1 is the outer shell of the smart phone, and the power supply assembly 34 is used for connecting the main board of the smart phone. The side of the fingerprint side key 31 opposite to the containing groove 2 is the fingerprint touch surface 311, and the surface of the fingerprint side key 31 is provided with a fingerprint sensor for sensing the fingerprint of a human body, and the fingerprint sensor is electrically connected with the fingerprint flexible circuit board 32 and the power supply assembly 34 respectively.

[0049] In this way, when the fingerprint module 3 is matched and installed in the containing groove 2 of the shell 1, in order to ensure that the screen of the smart phone can be awakened or turned on / off by pressing the fingerprint side key 31, a gap exists between the fingerprint side key 31 and the side wall of the containing groove 2, so that the fingerprint side key 31 moves downward by pressing, and then causes the elastic body 33 to elastically deform, and then presses the power supply assembly 34, and the power supply assembly 34 transmits the number and time of being pressed and other information to the main board of the smart phone, and then controls the screen of the smart phone to be awakened or turned on / off through the main board; and when the fingerprint side key 31 is no longer pressed, the elastic body 33 resets according to the elastic deformation thereof, and then resets the fingerprint side key 31 (i.e. the fingerprint touch surface 311 of the fingerprint side key 31 is higher than or flush with the opening of the containing groove 2).

[0050] Thus, the utility model discloses a first elastic lug 35 is arranged on the side of the fingerprint side key 31, and when the fingerprint side key 31 is not pressed, the top of the first elastic lug 35 is in close contact with the side wall of the accommodating groove 2 after slight elastic deformation, thereby preventing small molecular impurities or moisture from the outside from entering the accommodating groove 2 through the gap between the fingerprint side key 31 and the accommodating groove 2.

[0051] Of course, in other embodiments, to further improve the protection performance of the fingerprint module 3, as shown in Figure 5 The side of the fingerprint side key 31 can be continuously provided with two or more than two first elastic lugs 35 forming closed annular in the circumferential direction, which is not limited here.

[0052] Therefore, the utility model discloses a first elastic lug 35 is arranged on the side of the fingerprint side key 31 in the circumferential direction, and the first elastic lug 35 prevents small molecular impurities or moisture from the outside from entering the accommodating groove 2 by being in close contact with the side wall of the corresponding accommodating groove 2, thereby improving the protection performance of the fingerprint module 3.

[0053] Of course, in other embodiments, to further improve the protection performance of the fingerprint module 3, as shown in Figure 1 And Figure 4 The edge of the side of the fingerprint side key 31 towards the fingerprint flexible circuit board 32 is provided with a step portion 312, and the step portion 312 is continuously provided with at least one second elastic lug 36 forming closed annular in the circumferential direction on the side away from the fingerprint flexible circuit board 32, and the top of the second elastic lug 36 is in close contact with the side wall of the corresponding accommodating groove 2.

[0054] In this way, when the fingerprint side button 31 is not pressed, the top of the second elastic bump 36 will undergo a slight elastic deformation and then stick tightly to the side wall of the corresponding receiving groove 2. In this way, even if some small molecule impurities or moisture from the outside pass through the first elastic bump 35, they will be blocked by the second elastic bump 36, thereby preventing small molecule impurities or moisture from entering the receiving groove 2 through the gap between the fingerprint side button 31 and the receiving groove 2. When the fingerprint side button 31 is pressed, the fingerprint side button 31 will move slightly downward. The second elastic bump 36 will extend a small section due to its elastic deformation and reset (the length of the second elastic bump 36 after reset is equal to the distance the fingerprint side button 31 moves downward), so that the second elastic bump 36 still sticks tightly to the side wall of the corresponding receiving groove 2, preventing small molecule impurities or moisture from entering the receiving groove 2 through the gap between the fingerprint side button 31 and the receiving groove 2. Thus, the fingerprint module 3 can further improve its protective performance through the cooperation of the first elastic bump 35 and the second elastic bump 36.

[0055] Of course, in other embodiments, to further improve the protective performance of the fingerprint module 3, such as... Figure 5 As shown, the side of the stepped portion 312 facing away from the fingerprint flexible circuit board 32 may be provided with two or more first elastic bumps 35 forming a closed ring in the circumferential direction, which is not limited here.

[0056] Among them, to further improve the protection performance of fingerprint module 3, such as Figure 1 and Figure 4 As shown, the side of the stepped portion 312 is provided with at least one ring of third elastic protrusions 37 forming a closed loop, and the top of the third elastic protrusions 37 is in close contact with the side wall of the corresponding receiving groove 2.

[0057] In this way, when the fingerprint side button 31 is not pressed, the top of the third elastic bump 37 will undergo a slight elastic deformation and then stick tightly to the side wall of the corresponding receiving groove 2. In this way, even if some small molecule impurities or moisture from the outside pass through the first elastic bump 35 and the second elastic bump 36, they will be blocked by the third elastic bump 37, thereby preventing small molecule impurities or moisture from entering the receiving groove 2 through the gap between the fingerprint side button 31 and the receiving groove 2. When the fingerprint side button 31 is pressed, the fingerprint side button 31 will move slightly downward, and the third elastic bump 37 will move slightly downward with the fingerprint side button 31. During the movement, the first elastic bump 35 deforms and still sticks tightly to the side wall of the corresponding receiving groove 2, preventing small molecule impurities or moisture from entering the receiving groove 2 through the gap between the fingerprint side button 31 and the receiving groove 2. Thus, the fingerprint module 3 can further improve its protective performance through the cooperation of the first elastic bump 35, the second elastic bump 36 and the third elastic bump 37. Furthermore, when the fingerprint side button 31 is pressed and the elastic body 33 is reset, the third elastic protrusion 37 is also reset.

[0058] Of course, in other embodiments, to further improve the protection performance of the fingerprint module 3, as shown in FIG. 6, the side surface of the stepped portion 312 can be continuously provided with two or more than two circles of third elastic protrusions 37 to form a closed annular shape, which is not limited here. Figure 5

[0059] The top of the first elastic protrusion 35, the second elastic protrusion 36, and the third elastic protrusion 37 can be arc-shaped, square-shaped, spherical, cylindrical, elliptical, or other suitable shapes that can closely fit the accommodation groove 2, which is not limited here.

[0060] To ensure that the fingerprint side key 31 can be better attached to the fingerprint flexible circuit board 32, as shown in FIG. 7, at least one clamping groove 313 is provided on the edge of the side of the fingerprint side key 31 facing the fingerprint flexible circuit board 32. Figure 2

[0061] The fingerprint flexible circuit board 32 is provided with a clamping block 321 on the side facing the fingerprint side key 31, which can be matched and inserted into the corresponding clamping groove 313 to form an interference fit.

[0062] Specifically, the outer diameter of the clamping block 321 is 0.02-0.05mm larger than the inner diameter of the clamping groove 313, and then the clamping block 321 is pressed into the clamping groove 313 through the axial pressure of the corresponding hydraulic device or pressing device to form an interference fit.

[0063] To further ensure the protection performance of the fingerprint flexible circuit board 32 and the fingerprint side key 31, prevent small molecular impurities and moisture in the accommodation groove 2 from entering the connecting surface of the fingerprint side key 31 and the fingerprint flexible circuit board 32, the connecting surface of the fingerprint side key 31 and the fingerprint flexible circuit board 32 is coated with an insulating protective (waterproof and dustproof) glue layer through a dispensing process.

[0064] To ensure that the elastic body 33 can more stably drive the fingerprint side key 31 to reset, as shown in FIG. 8, the elastic body 33 is bonded to the fingerprint flexible circuit board 32 through a bonding layer 38. Figure 1

[0065] As shown in FIG. 9, the power supply assembly 34 includes a tactile switch 341 and a side key flexible circuit board 342. Figure 1

[0066] ​​​​The side of the elastic body 33 away from the fingerprint flexible circuit board 32 is connected with the tactile switch 341 and the side key flexible circuit board 342 in sequence; the side key flexible circuit board 342 is electrically connected with the fingerprint sensor, the fingerprint flexible circuit board 32 and the tactile switch 341 respectively; and the side key flexible circuit board 342 is used for connecting the mainboard of the smart phone.

[0067] In this way, when the fingerprint side key 31 is pressed, the fingerprint side key 31 will move slightly downward, so that the elastic body 33 is elastically deformed, and then the tactile switch 341 is pressed, the tactile switch 341 sends an electric signal to the side key flexible circuit board 342, and the side key flexible circuit board 342 transmits the electric signal to the mainboard of the smart phone.

[0068] In other embodiments, in order to further improve the protection performance (waterproof and dustproof) of the fingerprint module 3, the electronic devices (fingerprint flexible circuit board 32, tactile switch 341, side key flexible circuit board 342) in the fingerprint module 3 are separately coated with protective glue, which is preferably three-proofing glue, which plays a role in waterproof, dustproof and shockproof.

[0069] Embodiment 2

[0070] The connection or installation of the shell 1, the accommodating groove 2, the fingerprint side key 31, the fingerprint flexible circuit board 32, the elastic body 33 and the power supply assembly 34 of this embodiment is the same as that of embodiment 1.

[0071] As shown in Figure 6 , this embodiment is only provided with at least one circle of first elastic protrusions 35 forming a closed annular shape on the side of the fingerprint side key 31 in the circumferential direction, and the top of the first elastic protrusion 35 is tightly attached to the side wall of the corresponding accommodating groove 2.

[0072] Embodiment 3

[0073] The connection or installation of the shell 1, the accommodating groove 2, the fingerprint side key 31, the fingerprint flexible circuit board 32, the elastic body 33 and the power supply assembly 34 of this embodiment is the same as that of embodiment 1.

[0074] As shown in Figure 7 , this embodiment is only provided with at least one circle of second elastic protrusions 36 forming a closed annular shape on the side of the step portion 312 away from the fingerprint flexible circuit board 32 in the circumferential direction, and the top of the second elastic protrusion 36 is tightly attached to the side wall of the corresponding accommodating groove 2.

[0075] Embodiment 4

[0076] The connection or installation of the shell 1, the accommodating groove 2, the fingerprint side key 31, the fingerprint flexible circuit board 32, the elastic body 33 and the power supply assembly 34 of this embodiment is the same as that of embodiment 1.

[0077] As shown in Figure 8As shown, in this embodiment, at least one ring of third elastic protrusions 37 forming a closed loop is provided continuously along the circumferential direction on the side of the step portion 312, and the top of the third elastic protrusions 37 is in close contact with the side wall of the corresponding receiving groove 2.

[0078] Example 5

[0079] The connection or installation of the housing 1, receiving groove 2, fingerprint side key 31, fingerprint flexible circuit board 32, elastomer 33 and power assembly 34 in this embodiment is the same as in embodiment 1.

[0080] like Figure 9 As shown, in this embodiment, at least one ring of first elastic protrusion 35 is continuously provided in the circumferential direction on the side of the fingerprint side key 31 to form a closed ring, and at least one ring of second elastic protrusion 36 is continuously provided in the circumferential direction on the side of the step portion 312 facing away from the fingerprint flexible circuit board 32. The tops of the first elastic protrusion 35 and the second elastic protrusion 36 are in close contact with the sidewall of the corresponding receiving groove 2.

[0081] Example 6

[0082] The connection or installation of the housing 1, receiving groove 2, fingerprint side key 31, fingerprint flexible circuit board 32, elastomer 33 and power assembly 34 in this embodiment is the same as in embodiment 1.

[0083] like Figure 10 As shown, in this embodiment, at least one ring of first elastic protrusion 35 is continuously provided in the circumferential direction on the side of the fingerprint side key 31 to form a closed ring, and at least one ring of third elastic protrusion 37 is continuously provided in the circumferential direction on the side of the step portion 312 to form a closed ring. The tops of the first elastic protrusion 35 and the third elastic protrusion 37 are in close contact with the side wall of the corresponding receiving groove 2.

[0084] Example 7

[0085] The connection or installation of the housing 1, receiving groove 2, fingerprint side key 31, fingerprint flexible circuit board 32, elastomer 33 and power assembly 34 in this embodiment is the same as in embodiment 1.

[0086] like Figure 11 As shown, in this embodiment, at least one ring of second elastic protrusion 36 forming a closed loop is continuously provided circumferentially on the side of the step portion 312 facing away from the fingerprint flexible circuit board 32, and at least one ring of third elastic protrusion 37 forming a closed loop is continuously provided circumferentially on the side of the step portion 312. The tops of the second elastic protrusion 36 and the third elastic protrusion 37 are in close contact with the sidewall of the corresponding receiving groove 2.

[0087] Example 8

[0088] like Figure 12The utility model discloses still propose a kind of smart phone, the side of the smart phone includes the side fingerprint protection structure described above.

[0089] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments, the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments or equivalently replace some technical features. Any equivalent structure made by using the contents of the present application specification and drawings, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present application.

Claims

1. A side edge fingerprint prevention structure, characterized in that, The application relates to a side fingerprint protection structure of a smart phone. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2).

2. The side edge fingerprint prevention structure according to claim 1, wherein, The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape.

3. The side edge fingerprint prevention structure according to claim 2, wherein, The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2).

4. The side edge fingerprint prevention structure according to claim 3, wherein, The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape.

5. The side edge fingerprint prevention structure according to claim 1, wherein The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape.

6. The side edge fingerprint prevention structure according to claim 1, wherein The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2).

7. The side edge fingerprint prevention structure according to claim 1, wherein The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape.

8. The side edge fingerprint prevention structure according to claim 1, wherein, The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape.

9. A smartphone, characterized by The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape, spherical shape, cylindrical shape or elliptical shape. The side edge of the fingerprint side key (31) on the side facing the fingerprint flexible circuit board (32) is outwardly surrounded by a stepped portion (312), and at least one circle of second elastic protrusions (36) forming a closed ring is continuously arranged on the side of the stepped portion (312) in the circumferential direction, the top of the second elastic protrusions (36) being tightly attached to the side wall of the corresponding accommodating groove (2). The top of the first elastic protrusions (35), the second elastic protrusions (36) and the third elastic protrusions (37) is in any one of arc shape, square shape,

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