CN216216997U - Middle frame assembly and mobile terminal - Google Patents

Abstract

The utility model relates to a center subassembly and mobile terminal, this center subassembly includes the center body, be provided with the card on the center body and hold in the palm installed part, sound transmission channel and first through-hole, the card holds in the palm the inside cavity that is used for holding the card support that is formed with of installed part, sound transmission channel's first end be used for with the play sound mouth intercommunication of speaker, sound transmission channel's second end be used for with the cavity intercommunication, the first end of first through-hole with the cavity intercommunication, the second end of first through-hole be used for with the second through-hole intercommunication on the card support. This center subassembly has reduced and has offered the space that is used for the reinforcing sound alone on the center body, can practice thrift the space that the speaker on the center body took to conveniently lay other electronic components.

Description

Middle frame assembly and mobile terminal

Technical Field

The present disclosure relates to the field of electronic devices, and in particular, to a middle frame assembly and a mobile terminal.

Background

The center is the partly that constitutes mobile terminal, speaker setting on mobile terminal is on the center, the speaker requires in principle that the design has the sound chamber on the center, the sound chamber can occupy great structural space, but it can cause the usage space of terminal mainboard device goods of furniture for display rather than for use to occupy great structural space, influence the realization of other functions in terminal, the application of 5G technique also can cause the device to increase in a large number above the terminal mainboard simultaneously, make structural space and mainboard space all can receive the restriction, consequently, the performance that can only sacrifice the speaker satisfies other functional requirements, it is not good to lead to the speaker to go out the audio effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a center subassembly and mobile terminal, this center subassembly has reduced and has offered the space that is used for strengthening the sound alone on the center body, can practice thrift the space that the speaker on the center body took to conveniently lay other electronic components.

In order to realize the above-mentioned purpose, this disclosure provides a center subassembly, including the center body, be provided with card support installed part, sound transmission channel and first through-hole on the center body, the inside cavity that is used for holding the card support that is formed with of card support installed part, sound transmission channel's first end is used for the sound outlet intercommunication with the speaker, sound transmission channel's second end be used for with the cavity intercommunication, the first end of first through-hole with the cavity intercommunication, the second end of first through-hole be used for with the second through-hole intercommunication on the card support.

Optionally, a bearing platform for installing the loudspeaker is further arranged on the middle frame body, the bearing platform is located on one side of the card support installation part, and the sound transmission channel is formed in the bearing platform.

Optionally, a speaker seal is disposed on the carrier, the speaker seal exposing the first end of the sound transmission channel, the speaker seal being for sealing contact with the speaker.

Optionally, the number of the first through holes is one, and the first through holes are configured to be penetrated by a card taking needle; alternatively, the first and second electrodes may be,

the number of the first through holes is multiple, and at least one first through hole in the multiple first through holes is configured to be penetrated by a card taking needle.

Optionally, a handle groove is further formed in the middle frame body, the handle groove is used for accommodating a handle of the handle, a handle hole communicated with the cavity is formed in the handle groove, and the handle hole is used for inserting the handle into the cavity;

the first through hole through which the card taking needle can pass is positioned in the handle groove; or, the first through holes are all positioned in the handle slot.

Optionally, the center frame assembly further comprises a dust screen, and the dust screen cover is disposed on the second end of the sound transmission channel.

Optionally, a card support sealing element is arranged on the card support mounting element, and the card support sealing element is used for being in sealing contact with a main board mounted on the middle frame body.

Optionally, the card holder sealing member includes a first portion and a second portion, the first portion and the second portion are configured in an "L" shape, the first portion is used for clamping between the card holder mounting member and the main plate, and the second portion is used for clamping between the inner side wall of the middle frame body and the main plate.

Optionally, the card holder mounting piece and the first through hole are both located at the top end of the middle frame body; alternatively, the first and second electrodes may be,

the card holds in the palm the installed part with first through-hole all is located the bottom of center body.

Optionally, a handle groove is further formed in the middle frame body, the handle groove is used for accommodating a handle of the handle, a handle hole communicated with the cavity is formed in the handle groove, the handle hole is used for inserting the handle into the cavity, and a flexible member for pushing the handle of the handle to move in a direction away from the handle groove is arranged in the handle groove.

Optionally, the elastic member includes a spring, one end of the spring is connected in the first through hole, and the other end of the spring is used for abutting against the handle of the card holder.

Another aspect of the present disclosure further provides a mobile terminal, including a speaker, a card holder and the middle frame assembly as described above, where a sound outlet of the speaker is communicated with a first end of the sound transmission channel of the middle frame assembly, and the first through hole of the middle frame assembly is communicated with a second through hole on the card holder.

Through the technical scheme, the sound outlet of the loudspeaker is communicated with the cavity through the arranged sound transmission channel, so that the cavity can be used as a space for accommodating the card support and can also be used as a sound cavity space for sound enhancement transmission, two functions are ingeniously realized in the space of one cavity, and the problem that the loudspeaker is sound when the card support is not influenced is solved. This center subassembly has reduced and has offered the space that is used for the reinforcing sound alone on the center body, can practice thrift the space that the speaker on the center body took to conveniently lay other electronic components, guaranteed each item function demand of the mobile terminal who constitutes.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a partial perspective view of one orientation of a center frame assembly according to one embodiment of the present disclosure;

FIG. 2 is a partial perspective view of another orientation of the center frame assembly according to one embodiment of the present disclosure;

FIG. 3 is a schematic structural view of a card support seal of one embodiment of the present disclosure;

FIG. 4 is an exploded view of a mobile terminal of one embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a top portion of a mobile terminal of one embodiment of the present disclosure;

FIG. 6 is a partial cross-sectional view in one direction of a mobile terminal according to one embodiment of the present disclosure;

fig. 7 is a partial sectional view of another direction of a mobile terminal according to an embodiment of the present disclosure.

Description of the reference numerals

1. A middle frame body; 2. a bearing table; 3. a speaker seal; 4. a placement groove; 5. a sound transmission channel; 6. a first through hole; 7. a card holder mounting member; 8. clamping a support hole; 9. a cavity; 10. a card holder seal; 11. a handle slot; 12. an elastic member; 13. a dust screen; 14. an adhesive layer; 15. a screen; 16. a screen decoration; 17. clamping and supporting; 18. a main board; 19. a speaker; 20. a battery cover seal; 21. a battery cover; 22. a card holder; 23. a second via.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" are generally defined in the direction of the drawing plane of the drawings, and "inner and outer" refer to the inner and outer of the relevant component parts. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present disclosure, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

As shown in fig. 1 to 7, an aspect of the present disclosure provides a middle frame assembly, which includes a middle frame body 1, wherein a clip mounting member 7, a sound transmission channel 5, and a first through hole 6 are disposed on the middle frame body 1.

The card holds in the palm the inside cavity 9 that is used for holding card support 17 that is formed with of installed part 7, and the first end of sound transmission channel 5 is used for communicating with the sound outlet of speaker 19, and the second end of sound transmission channel 5 is used for communicating with cavity 9, and the first end and the cavity 9 intercommunication of first through-hole 6, the second end of first through-hole 6 is used for communicating with second through-hole 23 on the card support 17.

The card holder 17 can be placed in the cavity 9 to place the communication card. The sound transmission channel 5 is used for communicating the sound outlet of the loudspeaker 19 with the cavity 9, so that sound waves generated by the sound outlet of the loudspeaker 19 can enter the cavity 9 through the sound transmission channel 5, the cavity 9 can play a role of replacing a sound cavity in the existing design, the sound waves are reflected and overlapped in the sound cavity to increase, and the volume is increased. The first through hole 6 on the middle frame body 1 is communicated with the cavity 9, so that the enhanced sound can be transmitted to the outside through the first through hole 6 and the second through hole 23.

Among the above-mentioned technical scheme, sound transmission channel 5 through setting up communicates with the sound outlet and the cavity 9 of speaker 19 for cavity 9 can be used for holding the space that the card held in the palm 17 also can be used for as the sound chamber space of sound reinforcing transmission, thereby two kinds of functions are realized with the space of a cavity 9 ingenious, have solved the problem that speaker 19 goes out the sound when not influencing the card and hold in the palm 17 and lay. This center subassembly has reduced and has offered the space that is used for strengthening the sound alone on center body 1, can practice thrift the space that speaker 19 on center body 1 took to conveniently lay other electronic components, guaranteed each item function demand of the mobile terminal who constitutes.

Optionally, in an embodiment of the present disclosure, a bearing platform 2 for mounting the speaker 19 is further disposed on the middle frame body 1, the bearing platform 2 is located on one side of the card holder mounting member 7, and the sound transmission channel 5 is formed in the bearing platform 2.

In the present embodiment, the bearing platform 2 and the middle frame body 1 are integrally formed, the speaker 19 is installed on the bearing platform 2, the sound outlet of the speaker 19 faces the bearing platform 2, and the first end of the sound transmission channel 5 faces the speaker 19, so that after the speaker 19 is installed on the bearing platform 2, the first end of the sound transmission channel 5 is directly communicated with the sound outlet of the speaker 19. Wherein, in this embodiment, plummer 2 holds in the palm the adjacent setting of installed part 7 with the card, and plummer 2 holds in the palm installed part 7 integrated into one piece with the card for the second end of sound transmission channel 5 can directly communicate with cavity 9.

Of course, in other embodiments, the bearing platform 2 and the card holder mounting member 7 may be disposed at an interval, a connecting portion is formed on the bearing platform 2, the connecting portion is connected to the card holder mounting member 7, and the second end of the sound transmission channel 5 extends along the connecting portion to communicate with the cavity 9 of the card holder mounting member 7, so that sound transmission can be realized. The position relation between the specific bearing platform 2 and the card support mounting piece 7 can be selected according to the internal layout design of the mobile terminal.

Specifically, in the present embodiment, the bearing platform 2 and the card holder mounting member 7 are located inside the middle frame body 1, and the bearing platform 2 and the card holder mounting member 7 are integrally formed with the inner side wall of the middle frame body 1.

Optionally, in an embodiment of the present disclosure, the first end of the sound transmission channel 5 has a size larger than the sound outlet of the speaker 19, so that the sound waves generated by the sound outlet of the speaker 19 can completely enter the sound transmission channel 5.

Optionally, in another embodiment of the present disclosure, the bearing platform 2 may not be disposed on the middle frame body 1, the speaker 19 may be directly connected to the middle frame body 1, the sound transmission channel 5 is disposed on a side wall of the middle frame body 1, and a sound outlet of the speaker 19 faces the side wall of the middle frame body 1, so that a first end of the sound transmission channel 5 is communicated with the sound outlet of the speaker 19. The second end of the sound transmission channel 5 communicates with the cavity 9 of the card holder mounting member 7.

Optionally, in one embodiment of the present disclosure, a speaker seal 3 is disposed on the carrier 2, the speaker seal 3 exposing a first end of the sound transmission channel 5, the speaker seal 3 being adapted to sealingly contact the speaker 19.

In the present embodiment, the speaker sealing member 3 is located on the side where the bearing platform 2 and the speaker 19 are connected, and after the speaker 19 is installed on the bearing platform 2, the speaker sealing member 3 is clamped between the bearing platform 2 and the speaker 19, so that the gap at the connection position of the speaker 19 and the bearing platform 2 can be sealed, and water, dust, etc. can be prevented from entering the mobile terminal through the gap between the bearing platform 2 and the speaker 19 and contacting with electronic components such as the main board 18, etc. to cause damage. Specifically, the speaker seal 3 has a ring shape, and the ring-shaped speaker seal 3 is disposed along the edge of the first end of the sound transmission passage 5, so that the sound transmission passage 5 can be exposed without affecting the transmission of sound. Specifically, the speaker seal 3 is made of foam, and the speaker seal 3 can be bonded to the mount 2.

Alternatively, in one embodiment of the present disclosure, the number of the first through holes 6 is one, and the first through holes 6 are configured to allow the card-taking pin to pass through.

In this embodiment, when the first through hole 6 is one, the first through hole 6 may be used to transmit the sound in the cavity 9 to the outside through the first through hole 6, and the first through hole 6 may also be used to pass through a card pin to take out the card holder 17 placed in the cavity 9, so that the first through hole 6 may implement two functions. The requirement for the hole on the middle frame body 1 can be reduced, so that the integrity of the middle frame body 1 is higher. At present, partial users prefer the integrated design of the mobile terminal, the integrated design of the mobile terminal is mainly embodied in the ratio of the number of the openings on the middle frame body 1 to the screen of the screen 15, and the smaller the number of the openings on the middle frame body 1 is, the more the mobile terminal looks integrated, the more beautiful the mobile terminal is, and the mobile terminal is more favored by the users. Specifically, the first through hole 6 is located on a side wall of the middle frame body 1.

Optionally, in another embodiment of the present disclosure, the number of the first through holes 6 is plural, and at least one first through hole 6 of the plural first through holes 6 is configured to allow a card-taking needle to pass through.

In the present embodiment, the number of the first through holes 6 is set to be multiple, at least one first through hole 6 can be passed through by the card taking needle, the card holder 17 can be taken out, and the remaining first through holes 6 may be sound emitting holes. Specifically, the number of the first through holes 6 is 2-8, and one of the first through holes 6 can be penetrated by a card taking needle. When the number of the first through holes 6 is two, the two first through holes 6 can be arranged at intervals, so that the first through holes 6 can be distinguished from each other, and the card taking needle can pass through the first through holes 6. When the number of the first through holes 6 is 3-8, the first through holes 6 through which the card-taking needle can pass can be separated from the remaining first through holes 6 used as sound-emitting holes, and can also be arranged at equal intervals. The specific design can be selected according to actual design requirements. It should be noted that, when the number of the first through holes 6 is plural, the number of the second through holes 23 on the card holder 17 is also plural, and the second through holes correspond to the first through holes 6 one by one.

Optionally, in this embodiment, the first through hole 6 for passing the card taking pin may be disposed on the middle frame body 1 far away from the card holder mounting member 7, one end of the card holder mounting member 7 close to the middle frame body 1 may be extended to communicate with the first through hole 6 for passing the card taking pin, and the sound in the cavity 9 may also be transmitted to the outside, and may be specifically set according to design requirements.

Optionally, in an embodiment of the present disclosure, a handle slot 11 is further formed on the middle frame body 1, the handle slot 11 is used for accommodating a handle of the handle 17, a handle hole 8 communicated with the cavity 9 is formed in the handle slot 11, and the handle hole 8 is used for allowing the handle 17 to be inserted into the cavity 9. Wherein, the first through hole 6 for the card taking needle to pass through is located in the handle groove 11.

In this embodiment, after the card holder 17 is placed in the cavity 9 of the card holder mounting member 7, the handle of the card holder 17 can be placed in the handle groove 11, so that the handle of the card holder 17 is connected with the middle frame body 1. Specifically, the handle slot 11 is located on the outer side wall of the middle frame body 1, and the handle hole 8 is located at the slot bottom of the handle slot 11, so that the handle 17 can be placed into the cavity 9 of the handle mounting member 7 through the handle hole 8, and the handle of the handle 17 can be placed in the handle slot 11. Specifically, in the present embodiment, the first through hole 6 through which the card taking needle can pass is located in the handle groove 11, so that the card holder 17 can be conveniently taken out by the card taking needle. When the number of the first through holes 6 is one, the first through holes 6 can be penetrated by the card taking needle, and the first through holes 6 are located in the handle groove 11. When the number of the first through holes 6 is plural, the first through hole 6 for allowing the card taking needle to pass through is located in the card handle slot 11, and the remaining first through holes 6 are located outside the card handle slot 11.

Optionally, in another embodiment of the present disclosure, the first through holes 6 are located in the handle slot 11.

In this embodiment, when there are a plurality of first through holes 6, all the first through holes 6 are located in the handle slot 11.

Optionally, in an embodiment of the present disclosure, the middle frame assembly further includes a dust screen 13, and the dust screen 13 is disposed on the second end of the sound transmission channel 5.

In the present embodiment, the dust screen 13 is used to prevent particles such as dust from entering the sound transmission channel 5 and the sound outlet of the speaker 19 through the cavity 9, so as to avoid affecting the sound output effect. In the present embodiment, a placing groove 4 is opened at a second end of the card holder mounting member 7 close to the sound transmission channel 5, and the dust screen 13 is disposed in the placing groove 4 and bonded to the bottom of the placing groove 4 through an adhesive layer.

Optionally, in an embodiment of the present disclosure, a card holder sealing member 10 is provided on the card holder mounting member 7, and the card holder sealing member 10 is configured to be in sealing contact with a main board 18 mounted on the middle frame body 1.

In the present embodiment, the card-receiving seal 10 is used to seal the position where the card-receiving attachment 7 contacts the main plate 18 of the center frame body 1. It should be noted that, an opening for the communication card placed on the card holder 17 to be electrically connected to the main board 18 is provided on the card holder mounting member 7, so that the position where the card holder mounting member 7 contacts the main board 18 needs to be sealed to prevent water or dust from entering the inside of the mobile terminal through the gap between the contact positions of the card holder mounting member 7 and the main board 18, and causing damage to the main board 18, the electronic components on the main board 18, and other electronic components in the mobile terminal. Specifically, the card holder seal 10 is a foam material. The problem that the gap at the joint of the battery cover 21 and the middle frame body 1 is too large due to the fact that the battery cover 21 is jacked up when the card support 17 is pushed by the existing sealing rubber sleeve arranged on the card support 17 and the sealing rubber sleeve in interference fit can be avoided through the arranged card support sealing element 10.

Alternatively, in one embodiment of the present disclosure, the card-holder sealing member 10 includes a first portion and a second portion, the first portion and the second portion being configured in an "L" shape, the first portion being for being sandwiched between the card-holder mounting member 7 and the main plate 18, and the second portion being for being sandwiched between the inner side wall of the middle frame body 1 and the main plate 18.

In the present embodiment, the first portion is laid along the edge of the opening of the card holder mounting member 7, so that the first portion can be exposed out of the opening, so that the communication card on the card holder 17 can be electrically connected to the motherboard 18, and the connection between the card holder mounting member 7 and the motherboard 18 can be sealed. Because the card holds in the palm installed part 7 and is connected with the inside wall of center body 1, consequently there is the soil opening and center body 1's inside wall, can be close to the center body 1 through the second part and seal up the connecting seam line between open-ended inside wall and the mainboard 18 to improve sealed effect. Through first part and second part formula design as an organic whole, can improve holistic sealed effect.

Optionally, in an embodiment of the present disclosure, the card holder mounting member 7 and the first through hole 6 are both located at the top end of the middle frame body 1.

Wherein, in this embodiment, the card holds in the palm installed part 7 and first through-hole 6 and is located the top of center body 1 for the top of center subassembly is used for putting into the communication card, and the top of center subassembly is used for going out the sound simultaneously.

Optionally, in another embodiment of the present disclosure, the card holder mounting member 7 and the first through hole 6 are both located at the bottom end of the middle frame body 1.

Wherein, in this embodiment, the card holds in the palm installed part 7 and first through-hole 6 and is located the bottom of center body 1 for the bottom of center subassembly is used for putting into the communication card, and the bottom of center subassembly is used for going out the sound simultaneously.

Optionally, in an embodiment of the present disclosure, a resilient member 12 for pushing the handle of the handle 17 to move away from the handle slot 11 is disposed in the handle slot 11.

In the embodiment, the elastic member 12 is connected in the handle slot 11, and when the handle 17 is placed in the cavity 9 through the handle hole 8, the handle on the handle 17 presses the elastic member 12, so that the elastic member 12 is pressed and deformed. When the card holder 17 is taken out by passing the card taking needle through the first through hole 6, the elastic member 12 rebounds to push the card handle to move towards the direction far away from the handle slot 11. It should be noted that, the card support mounting member 7 is provided with a fastening structure which is matched with the card support 17 to fix the card support 17, and when the card support 17 is placed in the cavity 9 of the card support mounting member 7 through the card support hole 8, the fastening structure is connected with the card support 17 to lock the card support 17. When the card taking needle penetrates through the first through hole 6 and extends into the cavity 9, the card taking needle can be in contact with the buckle structure, so that the card holder 17 is unlocked, and the elastic piece 12 can rebound to push the card handle to move towards the direction far away from the handle slot 11. The snap structure on the card holder mounting member 7 is prior art, and the matching relationship with the card holder 17 is also prior art, and will not be described in detail herein. Elastic component 12 through setting up can do benefit to and hold in the palm 17 with the card and take out, alleviates to get card and holds in the palm 17 needs dynamics, can improve user's experience and feel.

Optionally, in an embodiment of the present disclosure, the elastic member 12 includes a spring, one end of the spring is connected in the first through hole 6, and the other end of the spring is used for abutting against the handle of the card holder 17.

In this embodiment, one end of the spring is connected to the first through hole 6, so that the spring can be fixed, when the handle enters the handle slot 11, the handle abuts against the other end of the spring to compress the spring, and when the handle 17 needs to be taken out, the spring rebounds to push the handle to move away from the handle slot 11. Through the spring that sets up, can conveniently get card needle and pass the spring, pass first through-hole 6 again. Specifically, the number of springs may coincide with the number of first through holes 6.

Another aspect of the present disclosure also provides a mobile terminal, which includes a speaker 19, a card holder 17 and the middle frame assembly as described above, wherein the sound outlet of the speaker 19 is communicated with the first end of the sound transmission channel 5 of the middle frame assembly, and the first through hole 6 of the middle frame assembly is communicated with the second through hole 23 of the card holder 17.

Optionally, in an embodiment of the present disclosure, the mobile terminal further includes: the screen 15, the mainboard 18 and the battery cover 21, the mainboard 18 is connected on the center body 1, the screen 15 is attached to one side of the center body 1, and the battery cover 21 is attached to the other side of the center body 1.

Specifically, in the present embodiment, the main board 18 is provided with a card socket 22 corresponding to the card holder 17, and the card socket 22 is used for electrically connecting with a communication card placed on the card holder 17. Specifically, speaker 19 is mounted on platform 2, and card holder 17 can be snapped into cavity 9 of card holder mounting member 7 through card holder hole 8.

Specifically, in this embodiment, the speaker 19 includes a housing and a speaker body, an opening is formed at one end of the housing, the speaker body is disposed in the housing, a sound outlet of the speaker body faces the opening, a space constituting a rear sound cavity is left between an inner wall of the housing and a back surface of the speaker body, and correspondingly, the cavity 9 of the card holder mounting member 7 forms a front sound cavity.

Through in this embodiment, regard first through-hole 6 as out the sound hole, can avoid setting up out the sound hole between screen 15 and middle frame body 1 to avoid opening the problem of breach on screen 15, screen 15 black border need not receive the influence of the play sound channel width of a sound hole simultaneously, has improved the screen of screen 15 greatly and has accounted for the ratio, the effectual problem of solving out the sound hole and restricting screen 15 black border. In addition, on the dispensing path between the screen 15 and the middle frame body 1, the glue does not overflow into the sound outlet channel of the loudspeaker 19, and the sound quality of the loudspeaker 19 is not affected.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (12)

1. The utility model provides a center subassembly, its characterized in that, includes center body (1), be provided with card support installed part (7), sound transmission channel (5) and first through-hole (6) on center body (1), the inside cavity (9) that is used for holding card support (17) that is formed with of card support installed part (7), the first end of sound transmission channel (5) is used for the sound outlet intercommunication with speaker (19), the second end of sound transmission channel (5) be used for with cavity (9) intercommunication, the first end of first through-hole (6) with cavity (9) intercommunication, the second end of first through-hole (6) be used for with second through-hole (23) intercommunication on card support (17).

2. The center frame assembly according to claim 1, wherein a bearing platform (2) for mounting the loudspeaker (19) is further arranged on the center frame body (1), the bearing platform (2) is located on one side of the clamping and supporting mounting piece (7), and the sound transmission channel (5) is formed in the bearing platform (2).

3. Center assembly according to claim 2, characterized in that a speaker seal (3) is arranged on the carrier table (2), the speaker seal (3) exposing a first end of the sound transmission channel (5), the speaker seal (3) being adapted for sealing contact with the speaker (19).

4. The middle frame assembly according to claim 1, wherein the number of the first through holes (6) is one, the first through holes (6) being configured to allow a card-taking pin to pass through; alternatively, the first and second electrodes may be,

the number of the first through holes (6) is multiple, and at least one first through hole (6) in the multiple first through holes (6) is configured to be penetrated by a card taking needle.

5. The middle frame assembly according to claim 4, wherein the middle frame body (1) further has an handle slot (11), the handle slot (11) is used for accommodating a handle of the handle (17), the handle slot (11) has a handle hole (8) communicating with the cavity (9), and the handle hole (8) is used for allowing the handle (17) to be inserted into the cavity (9);

wherein, the first through hole (6) through which the card taking needle can pass is positioned in the card handle groove (11); or, the first through holes (6) are all positioned in the handle slot (11).

6. The center frame assembly according to claim 1, further comprising a dust screen (13), the dust screen (13) being provided over the second end of the sound transmission channel (5).

7. The center frame assembly according to claim 1, characterized in that a card holder seal (10) is provided on the card holder mounting member (7), the card holder seal (10) being adapted to be in sealing contact with a main board (18) mounted on the center frame body (1).

8. The middle frame assembly according to claim 7, wherein the card-holder sealing member (10) includes a first portion and a second portion, the first portion and the second portion being configured in an "L" shape, the first portion being for being clamped between the card-holder mounting member (7) and the main plate (18), the second portion being for being clamped between an inner side wall of the middle frame body (1) and the main plate (18).

9. The middle frame assembly according to any one of claims 1 to 8, wherein the card holder mounting member (7) and the first through hole (6) are located at a top end of the middle frame body (1); alternatively, the first and second electrodes may be,

the card holds in the palm installed part (7) with first through-hole (6) all are located the bottom of center body (1).

10. The middle frame assembly according to claim 1, wherein the middle frame body (1) further has a handle slot (11), the handle slot (11) is used for accommodating a handle of the handle (17), the handle slot (11) has a handle hole (8) communicating with the cavity (9), the handle hole (8) is used for allowing the handle (17) to be inserted into the cavity (9), and the handle slot (11) has a resilient member (12) disposed therein for urging the handle of the handle (17) to move in a direction away from the handle slot (11).

11. The middle frame assembly according to claim 10, wherein the resilient member (12) comprises a spring, one end of the spring is connected to the first through hole (6), and the other end of the spring is used for abutting against the handle of the card holder (17).

12. A mobile terminal, characterized in that it comprises a speaker (19), a card holder (17) and a middle frame assembly according to any of claims 1-11, the sound outlet of the speaker (19) is in communication with a first end of the sound transmission channel (5) of the middle frame assembly, and the first through hole (6) of the middle frame assembly is in communication with a second through hole (23) on the card holder (17).

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