CN116366753A

CN116366753A - Mobile phone shell grounding structure

Info

Publication number: CN116366753A
Application number: CN202310432467.2A
Authority: CN
Inventors: 邓克福; 李志超; 李明辉
Original assignee: Nanchang Qinsheng Electronic Technology Co ltd
Current assignee: Nanchang Qinsheng Electronic Technology Co ltd
Priority date: 2023-04-21
Filing date: 2023-04-21
Publication date: 2023-06-30

Abstract

The invention provides a mobile phone shell grounding structure, which comprises a front shell, an LCD module, a main board and a small board, wherein the LCD module is arranged on one surface of the front shell; the front shell is an injection molded plastic part, an iron frame part is sleeved on the surface of the LCD module, which is matched with the front shell, a first elastic sheet and a second elastic sheet are arranged on the iron frame part, the first elastic sheet passes through the front shell to be abutted against the main board, and the second elastic sheet passes through the front shell to be abutted against the small board; the first elastic sheet is used for forming a first grounding loop between the iron frame piece and the main board, and the second elastic sheet is used for forming a second grounding loop between the iron frame piece and the small board. The mobile phone shell grounding structure is simple in structure, more convenient to mold, more beneficial to the light and thin development of mobile phones, good in grounding effect and suitable for wide popularization and use, and the cost is greatly reduced.

Description

Mobile phone shell grounding structure

Technical Field

The invention relates to the technical field of electronic equipment, in particular to a mobile phone shell grounding structure.

Background

The main board and the small board are two core components inside the mobile phone. The main board is responsible for controlling the operation of the whole mobile phone, including a processor, storage, battery management and the like. The small plate generally comprises a camera, a USB interface, a sound processing and vibrator and other components of the mobile phone. The main board and the small board are connected by a flat cable so that the two boards can perform data transmission, communication, control and the like. In order to prevent the person from being shocked, prevent static damage and ensure the normal operation of the equipment, good metal connection is needed between the metal part of the electrical equipment which is not electrified under normal conditions and the grounding electrode to realize the functions of grounding and ground wire reflux. The conventional main board grounding scheme is to connect the main board and the small board with the housing to realize the grounding function, so the housing is generally made of conductive metal material or is formed by in-mold injection molding through a metal piece, so that the metal part of the housing can realize the grounding and ground wire reflow functions with the main board and the small board.

The metal shell is required to be molded through forging, extrusion, CNC, sand blasting, coating and other processes, and has high molding cost and troublesome manufacturing process. In order to save cost, some brands can be subjected to in-mold injection molding through metal sheets, so that the functions of grounding and ground wire reflux can be realized, and the cost is greatly reduced. However, the in-mold injection of aluminum alloy or other metal sheets made of other materials is not mature and cannot be widely used, and on the other hand, the in-mold alloy injection has the problems of complex process and high molding cost.

Therefore, it is necessary to provide a grounding structure of a mobile phone housing, which can reduce the cost and realize the grounding function of a motherboard and a small board.

Disclosure of Invention

The invention aims to provide a mobile phone shell grounding structure which can reduce cost and realize the grounding function of a main board and a small board.

In order to achieve the above-mentioned purpose, the invention provides a mobile phone shell grounding structure, including front shell, LCD module, motherboard and small plate, the LCD module is installed on one side of front shell, the motherboard and small plate are installed on another side of front shell; the front shell is an injection molded plastic part, an iron frame part is sleeved on the surface of the LCD module, which is matched with the front shell, a first elastic sheet and a second elastic sheet are arranged on the iron frame part, the first elastic sheet passes through the front shell to be abutted against the main board, and the second elastic sheet passes through the front shell to be abutted against the small board; the first elastic sheet is used for forming a first grounding loop between the iron frame piece and the main board, and the second elastic sheet is used for forming a second grounding loop between the iron frame piece and the small board.

Preferably, a first through groove is formed in the front shell in a penetrating manner, the first through groove is used for allowing the first elastic sheet to pass through, and the first elastic sheet passes through the first through groove to be capable of connecting the iron frame piece and the main board so as to form a first grounding loop.

Preferably, the number of the first elastic pieces is at least one, and the number of the first through grooves is consistent with the number of the first elastic pieces.

Preferably, the front shell is further provided with a second through groove in a penetrating manner, the second through groove is used for allowing the second elastic sheet to pass through, and the second elastic sheet passes through the second through groove to be capable of connecting the iron frame piece and the small plate so as to form a second grounding loop.

Preferably, the number of the second through slots is at least one, and the number of the second through slots is consistent with the number of the second elastic sheets.

Preferably, the front case includes a first accommodating cavity for accommodating the iron frame and the LCD module.

Preferably, the LCD module is provided with a step-shaped convex part in a protruding mode, the iron frame piece is sleeved on the convex part, the iron frame piece is provided with a containing space for containing the convex part, and the iron frame piece is sleeved on the convex part through the containing space.

Preferably, the first accommodating cavity comprises a first mounting part and a second mounting part, the LCD module is mounted on the first mounting part in a clamping way, and the iron frame piece and the convex part are mounted in the second mounting part.

Preferably, the first elastic sheet comprises a first mounting part and a first abutting part, the first mounting part is mounted and fixed on the iron frame, and the first abutting part abuts against the main board; the second elastic sheet comprises a second mounting part and a second abutting part, the second mounting part is mounted and fixed on the iron frame piece, and the second abutting part abuts against the small plate.

Preferably, the other surface of the front shell is also provided with a second accommodating cavity and a third accommodating cavity, the second accommodating cavity is used for installing the main board, and the third accommodating cavity is used for installing the small board.

Compared with the prior art, the mobile phone shell grounding structure comprises a front shell, an LCD module, a main board and a small board. The front shell of the previous mobile phone is generally made of metal materials, or a metal piece is arranged in the front shell, the front shell made of metal materials or the front shell with the metal piece arranged therein can be connected with a main board and/or a small board through the metal piece to realize a contact and form a grounding loop through injection molding of the metal piece in a mold. But the front shell made of metal or the front shell with metal parts has complex molding process and higher molding cost. On the other hand, the front shell with the metal piece for in-mold injection molding is complex in molding and high in cost, and the thickness of the whole front shell can be increased, so that the thickness is unfavorable for the light and thin mobile phone. Specifically, the LCD module is mounted on one side of the front case. The main board and the small board are arranged on the other surface of the front shell and are opposite to the LCD module. Illustratively, the LCD module is mounted on the top surface of the front case, and then the main board and the small board are mounted on the bottom surface of the front case, and the LCD module is separated from the main board and the small board by the front case. Wherein, the front shell is an injection molding plastic part. The whole front shell is made of plastic materials, so that the plastic injection molding is facilitated, the front shell is lighter, and the cost is greatly reduced; compared with an injection molding front shell with a metal piece, the front shell is thinner, and is favorable for the development of light and thin mobile phones. On the other hand, the surface of the LCD module matched with the front shell is sleeved with an iron frame piece, and the iron frame piece is used for supporting the LCD module and can improve the structural strength of the LCD module. Meanwhile, the iron frame piece can protect the whole LCD module, so that the ultrathin design of the LCD module can be realized, and the corresponding reliability requirement can be met. The iron frame is provided with a shield, and the shield can also function to discharge GND at the time of grounding. GND is the ground terminal, representing the ground or 0 line, i.e., the iron frame can be grounded in place of the metal shell. In the invention, a first elastic sheet and a second elastic sheet are arranged on the iron frame piece. One end of the first elastic sheet is attached to the iron frame piece, and the other end of the first elastic sheet passes through the front shell and is abutted to the main board. One end of the second elastic sheet is attached to the iron frame piece, and the other end of the second elastic sheet passes through the front shell and is abutted to the small plate. The first elastic sheet is used for forming a first grounding loop between the iron frame piece and the main board, and the second elastic sheet is used for forming a second grounding loop between the iron frame piece and the small board. The first elastic sheet and the second elastic sheet are attached to the iron frame piece, connection is stable, the LCD module is prevented from being damaged when the first elastic sheet and/or the second elastic sheet are elastically abutted against the LCD module, and meanwhile, the contact points of the first elastic sheet and the second elastic sheet with the iron frame piece can be increased, so that the grounding effect is better. The mobile phone shell grounding structure is simple in structure, greatly reduces cost, is more beneficial to the light and thin development of mobile phones, and is good in grounding effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic cross-sectional view of a grounding structure of a mobile phone housing according to an embodiment of the present invention.

Fig. 2 is a structural diagram of a grounding structure of a mobile phone housing according to an embodiment of the present invention.

Fig. 3 is a view of the structure of fig. 2 at another angle.

Fig. 4 is an exploded view of the structure of fig. 2.

Fig. 5 is a cross-sectional view of the front housing of fig. 4.

Fig. 6 is a structural view of the front case of fig. 5.

Fig. 7 is a partial structural view of fig. 6.

Fig. 8 is a partial block diagram of the alternative position of fig. 6.

Fig. 9 is a view of the structure of fig. 6 at another angle.

Fig. 10 is an exploded view of the LCD module and the iron frame member at an angle in fig. 4.

Fig. 11 is a structural view of the first spring in fig. 4.

Fig. 12 is a structural view of the second spring in fig. 4.

Reference numerals illustrate:

100. a mobile phone shell grounding structure;

10. a front shell; 11. a first accommodation chamber; 111. a first mounting portion; 112. a second mounting portion; 12. a second accommodation chamber; 13. a third accommodation chamber; 14. a fourth accommodation chamber; 15. a first through groove; 16. a second through slot;

20. an LCD module; 21. a convex portion;

30. an iron frame member; 31. an accommodating space;

40. a main board;

50. a small plate;

60. a first elastic sheet; 61. a first mounting portion; 62. a first abutting portion;

70. a second spring plate; 71. a second mounting part; 72. and a second abutting portion.

Detailed Description

In order to describe the technical content and constructional features of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.

Referring to fig. 1 to 4, the grounding structure 100 of a mobile phone housing of the present invention includes a front case 10, an LCD module 20, a motherboard 40 and a small board 50. The LCD module 20 is mounted on one side of the front case 10, and the main board 40 and the small board 50 are mounted on the other side of the front case 10. Illustratively, the LCD module 20 is mounted on the top surface of the front case 10, and the main board 40 and the small board 50 are mounted on the bottom surface of the front case 10, so that the LCD module 20 and the main board 40 and the small board 50 may be separated by the front case 10. The front case 10 of the mobile phone is generally a metal structure made of metal. Or a metal piece is provided in the front case 10, and is injection-molded in a mold by the metal piece. The front case 10 made of metal or the front case 10 with the metal member built therein can be connected to the motherboard 40 and/or the small board 50 by the metal member to realize a contact and form a ground circuit. However, the front case 10 made of metal or the front case 10 with metal piece has complicated molding process and high molding cost. On the other hand, the front case 10 with the metal piece for in-mold injection molding is complex in molding and high in cost, and the thickness of the whole front case 10 is increased, which is not beneficial to the light and thin of the mobile phone. Compared with the front case 10 of the mobile phone, the front case 10 in the embodiment is an injection molded plastic part. The whole front shell 10 is made of plastic materials, is more convenient for injection molding, is lighter and has greatly reduced cost. Compared with the injection molding front shell 10 with metal parts, the front shell 10 of the invention has thinner thickness, which is beneficial to the development of light and thin mobile phones. Wherein, the surface of the LCD module 20 matched with the front shell 10 is sleeved with a frame member 30, and the frame member 30 is used for supporting the LCD module 20, so that the structural strength of the LCD module 20 can be improved. Meanwhile, the iron frame 30 can protect the whole LCD module 20, so that the ultrathin design of the LCD module 20 can be realized, and the corresponding structural reliability requirement can be met. The iron frame 30 is provided with a shield, and can also function as GND discharge at the time of grounding. GND is the ground terminal, representing the ground or 0 line, i.e., the iron frame can be grounded in place of the metal shell. Specifically, the iron frame 30 is provided with a first elastic piece 60 and a second elastic piece 70. One end of the first elastic piece 60 is attached to the iron frame 30, and the other end of the first elastic piece 60 passes through the front shell 10 and abuts against the main board 40. One end of the second elastic piece 70 is attached to the iron frame 30, and the other end of the second elastic piece 70 passes through the front shell 10 and abuts against the small plate 50. The first spring plate 60 forms a first ground circuit between the frame member 30 and the main board 40, and the second spring plate 70 forms a second ground circuit between the frame member 30 and the small board 50. The first elastic sheet 60 and the second elastic sheet 70 are mounted on the iron frame 30, so that the connection is stable, the LCD module 20 is prevented from being damaged when the first elastic sheet 60 and/or the second elastic sheet 70 are elastically abutted against the LCD module 20, and meanwhile, the contact points between the first elastic sheet 60 and the second elastic sheet 70 and the iron frame 30 can be increased, so that the grounding effect is better. The grounding structure 100 of the mobile phone shell has a simple structure, greatly reduces the cost, is more beneficial to the development of light weight and thin weight of the mobile phone, and has good grounding effect.

Referring to fig. 5 to 7, in some alternative embodiments, a first through slot 15 is formed on the front shell 10, and the first through slot 15 is used for the first elastic sheet 60 to pass through. The first elastic piece 60 passes through the first through slot 15 to connect the iron frame 30 and the main board 40, so as to form a first grounding loop. One end of the first elastic sheet 60 is fixed on the iron frame 30, and the connection is stable. If one end of the first elastic sheet 60 is attached to the main board 40 and the other end is abutted to the iron frame 30, the elastic force of the first elastic sheet 60 may damage the LCD module 20 and damage the LCD structure. On the other hand, the first elastic sheet 60 is attached to the iron frame 30, so that the contact point between the first elastic sheet 60 and the iron frame 30 can be increased, and the grounding effect is better.

Referring to fig. 4, in some alternative embodiments, the number of the first elastic pieces 60 is at least one, and the number of the first through slots 15 is identical to the number of the first elastic pieces 60. The first through slot 15 is used for allowing the first elastic sheet 60 to pass through so as to connect the iron frame member 30 and the main board 40 at two sides of the front shell 10. In the embodiment, the number of the first elastic pieces 60 is two, the number of the first through slots 15 is also two, one end of each of the two first elastic pieces 60 is attached to the iron frame 30, and the other end passes through one of the first through slots 15 and abuts against the grounding point of the main board 40. The first grounding loops of more than two groups are arranged, so that the grounding of the main board 40 can be better ensured. The number of the first elastic pieces 60 and the first through slots 15 can be more according to actual needs.

Referring to fig. 4 and 11, in some alternative embodiments, the first elastic piece 60 includes a first mounting portion 61 and a first abutting portion 62. The first attaching portion 61 is attached to the iron frame 30, and the first abutting portion 62 abuts against the main board 40. The first attaching portion 61 has a flat structure so as to be attached and welded to the frame member 30 more preferably. The first abutting portion 62 is in a hook-shaped structure that is bent upwards, and the arc surface of the first abutting portion 62 acts on the main board 40, so that the contact area between the first elastic sheet 60 and the main board 40 can be increased, and the main board 40 can be prevented from being damaged. Meanwhile, the first abutting portion 62 of the hook-shaped structure has a certain elasticity, so that contact between the first elastic sheet 60 and the main board 40 can be ensured.

Referring to fig. 5, 6 and 8, in some alternative embodiments, a second through slot 16 is further formed on the front shell 10, and the second through slot 16 is used for passing through the second elastic sheet 70. Since the main board 40 and the small board 50 are different in size, the first through groove 15 and the second through groove 16 may be opened at different positions and sizes. The second spring plate 70 passes through the second through slot 16 to connect the iron frame 30 and the small plate 50, so as to form a second ground circuit. Specifically, one end of the second elastic sheet 70 is fixed on the iron frame 30, and the connection is stable. If one end of the second elastic sheet 70 is attached to the small plate 50 and the other end is abutted against the iron frame 30, the elastic force of the second elastic sheet 70 may damage the LCD module 20 and damage the LCD structure. On the other hand, the second elastic sheet 70 is attached to the iron frame 30, so that the contact point between the second elastic sheet 70 and the iron frame 30 can be increased, and the grounding effect is better.

Referring to fig. 4, in some alternative embodiments, the number of second through slots 16 is at least one, and the number of second through slots 16 is identical to the number of second spring plates 70. The second through slot 16 is used for allowing the second elastic sheet 70 to pass through so as to connect the iron frame 30 and the small plate 50 at two sides of the front shell 10. In the present embodiment, the number of the second elastic pieces 70 is two, the number of the second through slots 16 is two, one end of each of the two second elastic pieces 70 is attached to the iron frame 30, and the other end passes through one of the second through slots 16 and abuts against the grounding point of the small plate 50. The provision of two or more sets of second ground loops can better ensure the grounding of the small plate 50. The number of the second spring plates 70 and the second through slots 16 may be greater according to actual needs.

Referring to fig. 4 and 11, in some alternative embodiments, the second spring 70 may have the same structure as the first spring 60. The second elastic piece 70 includes a second attaching portion 71 and a second abutting portion 72, the second attaching portion 71 is attached and fixed to the iron frame 30, and the second abutting portion 72 abuts against the small plate 50. The second attaching portion 71 is attached to the iron frame 30, and the second abutting portion 72 abuts against the small plate 50. The second attaching portion 71 has a straight structure so as to be attached and welded to the iron frame 30 better. The second abutting portion 72 has a hook-shaped structure that is bent upwards, and the arc surface of the second abutting portion 72 acts on the small plate 50, so that the contact area between the second elastic sheet 70 and the main board 40 can be increased, and the small plate 50 can be prevented from being damaged. Meanwhile, the second abutting portion 72 of the hook-shaped structure has a certain elasticity, so that contact between the second elastic sheet 70 and the small plate 50 can be ensured. It will be appreciated that the motherboard 40 and the small board 50 are two core components inside the handset. It will be appreciated that the motherboard 40 is responsible for controlling the operation of the overall handset, including processor, storage, battery management, etc. The tablet 50 typically includes components such as a camera, USB interface, sound processing, vibrator, etc. of the cell phone. The motherboard 40 and the small board 50 are connected by a flat cable to allow data transmission, communication, control, etc. between the two boards. In order to prevent the person from being shocked, prevent static damage and ensure the normal operation of the equipment, good metal connection is needed between the metal part of the electrical equipment which is not electrified under normal conditions and the grounding electrode to realize the functions of grounding and ground wire reflux. Therefore, both the motherboard 40 and the small board 50 need to be connected with the iron frame 30 through metal spring plates to realize the functions of grounding and ground wire reflow.

Referring to fig. 5 to 8, in some alternative embodiments, the front case 10 includes a first accommodating cavity 11, and the first accommodating cavity 11 is used for accommodating the iron frame 30 and the LCD module 20. It will be appreciated that the LCD module 20 and the iron frame 30 are both mounted within the first housing cavity 11. The LCD module 20 is flush with the upper end of the first accommodating cavity 11, or the upper surface of the LCD module 20 is also located in the first accommodating cavity 11. Wherein, the LCD module 20 is provided with a stepped protrusion 21 protruding thereon, and the iron frame 30 is sleeved on the protrusion 21. Specifically, the iron frame 30 is provided with a receiving space 31 for receiving the protrusion 21, and the iron frame 30 is sleeved on the protrusion 21 by the receiving space 31. The iron frame 30 is used for supporting the LCD module 20, and can improve the structural strength of the LCD module 20. Meanwhile, the iron frame 30 can protect the whole LCD module 20, so that the ultrathin design of the LCD module 20 can be realized, and the corresponding structural reliability requirement can be met. The iron frame 30 is provided with a shield, and can also function as GND discharge at the time of grounding. GND is the ground terminal, representing the ground or 0 line, i.e., the iron frame can be grounded in place of the metal shell. That is, the iron frame 30 can replace the original metal front shell 10 to be grounded, so that the whole front shell 10 has lower manufacturing cost and the whole grounding effect is not affected. The mobile phone shell grounding structure 100 is more convenient to mold, greatly reduces the cost and is suitable for wide popularization and use.

Referring to fig. 5 to 8, in some alternative embodiments, the first accommodating cavity 11 includes a first mounting portion 111 and a second mounting portion 112, the lcd module 20 is mounted on the first mounting portion 111 in a snap fit manner, and the iron frame 30 and the protruding portion 21 are mounted in the second mounting portion 112. It is understood that the structure of the first accommodating cavity 11 is matched with that of the LCD module 20. The protrusion 21 cooperates with the first and second mounting

portions

111 and 112 so that the entire LCD module 20 and the iron frame 30 are more stably mounted in the first receiving cavity 11 of the front case 10. The structure is compact and reasonable.

Referring to fig. 5 and 9, in some alternative embodiments, the other side of the front case 10 is further provided with a second accommodating chamber 12, a third accommodating chamber 13, and a fourth accommodating chamber 14. The second accommodating chamber 12 is used for installing the motherboard 40, the third accommodating chamber 13 is used for installing the small board 50, and the fourth accommodating chamber 14 can be used for installing other electronic components such as a battery. It will be appreciated that the second accommodating cavity 12, the third accommodating cavity 13 and the fourth accommodating cavity 14 are separated, so that the main board 40, the small board 50 and other electronic components can be more firmly installed in the front shell 10 without displacement, and can be better connected with other components.

As shown in fig. 1 to 12, the mobile phone case grounding structure 100 of the present invention includes a front case 10, an LCD module 20, a main board 40 and a small board 50. The LCD module 20 is mounted on one side of the front case 10, and the main board 40 and the small board 50 are mounted on the other side of the front case 10. Illustratively, the LCD module 20 is mounted on the top surface of the front case 10, and the main board 40 and the small board 50 are mounted on the bottom surface of the front case 10, so that the LCD module 20 and the main board 40 and the small board 50 may be separated by the front case 10. The front case 10 of the mobile phone is generally a metal structure made of metal. Or a metal piece is provided in the front case 10, and is injection-molded in a mold by the metal piece. The front case 10 made of metal or the front case 10 with the metal member built therein can be connected to the motherboard 40 and/or the small board 50 by the metal member to realize a contact and form a ground circuit. However, the front case 10 made of metal or the front case 10 with metal piece has complicated molding process and high molding cost. On the other hand, the front case 10 with the metal piece for in-mold injection molding is complex in molding and high in cost, and the thickness of the whole front case 10 is increased, which is not beneficial to the light and thin of the mobile phone. Compared with the front case 10 of the mobile phone, the front case 10 in the embodiment is an injection molded plastic part. The whole front shell 10 is made of plastic materials, is more convenient for injection molding, is lighter and has greatly reduced cost. Compared with the injection molding front shell 10 with metal parts, the front shell 10 of the invention has thinner thickness, which is beneficial to the development of light and thin mobile phones. Wherein, the surface of the LCD module 20 matched with the front shell 10 is sleeved with a frame member 30, and the frame member 30 is used for supporting the LCD module 20, so that the structural strength of the LCD module 20 can be improved. Meanwhile, the iron frame 30 can protect the whole LCD module 20, so that the ultrathin design of the LCD module 20 can be realized, and the corresponding reliability requirement can be met. The iron frame 30 is provided with a shield, and can also function as GND discharge at the time of grounding. GND is the ground terminal, representing the ground or 0 line, i.e., the iron frame can be grounded in place of the metal shell. Specifically, the iron frame 30 is provided with a first elastic piece 60 and a second elastic piece 70. One end of the first elastic piece 60 is attached to the iron frame 30, and the other end of the first elastic piece 60 passes through the front shell 10 and abuts against the main board 40. One end of the second elastic piece 70 is attached to the iron frame 30, and the other end of the second elastic piece 70 passes through the front shell 10 and abuts against the small plate 50. The first spring plate 60 forms a first ground circuit between the frame member 30 and the main board 40, and the second spring plate 70 forms a second ground circuit between the frame member 30 and the small board 50. The first elastic sheet 60 and the second elastic sheet 70 are mounted on the iron frame 30, so that the connection is stable, the LCD module 20 is prevented from being damaged when the first elastic sheet 60 and/or the second elastic sheet 70 are elastically abutted against the LCD module 20, and meanwhile, the contact points between the first elastic sheet 60 and the second elastic sheet 70 and the iron frame 30 can be increased, so that the grounding effect is better. The grounding structure 100 of the mobile phone shell has a simple structure, greatly reduces the cost, is more beneficial to the development of light weight and thin weight of the mobile phone, and has good grounding effect.

The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. The mobile phone shell grounding structure is characterized by comprising a front shell, an LCD module, a main board and a small board, wherein the LCD module is arranged on one surface of the front shell, and the main board and the small board are arranged on the other surface of the front shell; the front shell is an injection molded plastic part, an iron frame part is sleeved on the surface of the LCD module, which is matched with the front shell, a first elastic sheet and a second elastic sheet are arranged on the iron frame part, the first elastic sheet passes through the front shell to be abutted to the main board, and the second elastic sheet passes through the front shell to be abutted to the small board; the first elastic sheet is used for forming a first grounding loop between the iron frame piece and the main board, and the second elastic sheet is used for forming a second grounding loop between the iron frame piece and the small board.

2. The mobile phone shell grounding structure according to claim 1, wherein a first through groove is formed in the front shell in a penetrating manner, the first through groove is used for allowing the first elastic sheet to pass through, and the first elastic sheet passes through the first through groove to be capable of connecting the iron frame piece and the main board so as to form the first grounding loop.

3. The grounding structure of claim 2, wherein the number of the first elastic pieces is at least one, and the number of the first through grooves is identical to the number of the first elastic pieces.

4. The mobile phone shell grounding structure according to claim 1, wherein a second through slot is further formed in the front shell in a penetrating manner, the second through slot is used for allowing the second elastic sheet to pass through, and the second elastic sheet passes through the second through slot to be capable of connecting the iron frame piece and the small plate so as to form the second grounding loop.

5. The grounding structure of claim 4, wherein the number of second through slots is at least one, and the number of second through slots is identical to the number of second spring pieces.

6. The mobile phone housing grounding structure of claim 1, wherein the front case comprises a first receiving cavity for receiving the iron frame member and the LCD module.

7. The grounding structure of claim 6, wherein the LCD module has a stepped protrusion protruding therefrom, the iron frame is sleeved on the protrusion, and the iron frame is provided with a receiving space for receiving the protrusion, so that the iron frame is sleeved on the protrusion through the receiving space.

8. The mobile phone housing grounding structure according to claim 7, wherein the first accommodating cavity comprises a first mounting portion and a second mounting portion, the LCD module is mounted on the first mounting portion in a snap fit manner, and the iron frame and the protruding portion are mounted in the second mounting portion.

9. The mobile phone case grounding structure according to claim 1, wherein the first elastic sheet includes a first attaching portion attached to the iron frame member and a first abutting portion abutting against the main board; the second elastic sheet comprises a second mounting part and a second abutting part, the second mounting part is fixedly mounted on the iron frame piece in a mounting mode, and the second abutting part abuts against the small plate.

10. The mobile phone shell grounding structure according to claim 1, wherein a second accommodating cavity and a third accommodating cavity are further formed in the other surface of the front shell, the second accommodating cavity is used for installing the main board, and the third accommodating cavity is used for installing the small board.