CN109246260B

CN109246260B - Mobile terminal and shell assembly thereof

Info

Publication number: CN109246260B
Application number: CN201811058354.6A
Authority: CN
Inventors: 邱康; 杨璟; 范奇文; 陈耀权
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-09-11
Filing date: 2018-09-11
Publication date: 2020-07-03
Anticipated expiration: 2038-09-11
Also published as: CN109246260A

Abstract

The application provides a mobile terminal and a shell assembly thereof, wherein the shell assembly comprises a middle frame and a sound cavity cover plate; the middle frame comprises a main plate body and side plate bodies; the main board body comprises a first surface, a second surface and a plurality of side surfaces, the first surface and the second surface are arranged in a back-to-back mode, the side surfaces are connected with the first surface and the second surface, an annular boss is arranged on the first surface, a sound cavity area is formed by the annular boss in a surrounding mode, and a sound cavity cover plate is abutted to the top surface of the annular boss to form a sound cavity of the loudspeaker together with the middle frame in a surrounding mode; at least one side face of the main plate body on the top face of the annular boss is connected, an included angle between the side face and the top face of the annular boss is an obtuse angle, a dovetail groove is formed in the side face, a dovetail-shaped protruding portion is arranged on the side plate body, and the main plate body and the side plate body are connected through cooperation of the protruding portion and the dovetail groove. The structure of the shell assembly can ensure the flatness of the annular boss top surface of the main board, so that the middle frame can form a sound cavity with good sealing performance by abutting against the sound cavity cover plate, and further ensure that the middle frame is located the sound effect of the mobile terminal loudspeaker in the sound cavity.

Description

Mobile terminal and shell assembly thereof

Technical Field

The invention relates to the technical field of mobile terminal equipment structures, in particular to a mobile terminal and a shell assembly thereof.

Background

Many middle frames of mobile terminal equipment are formed by integrally injection molding a metal plate and a plastic frame (because the middle frame has high material cost, high CNC machining difficulty, complex process and low product yield in an integral metal structure), and the injection molding connection position of the metal plate and the plastic frame is often the sealing position of a sound cavity of a speaker of the mobile terminal formed by the middle frame and other parts (such as a middle frame support or a rear shell).

As is known, in the process of integral injection molding, a step difference generally occurs at a connection position (the step difference refers to a matching deviation caused by a deviation of processing precision between molded surfaces such as two mold inserts or a front mold and a rear mold, and generally, before the mold is processed, a mold manufacturer can negotiate with a product designer in detail which side of the deviation should be higher, and if a formed product is consistent with the negotiated side, the product is called as a smooth difference, and otherwise, the product is a reverse difference).

The hookup location of moulding plastics is located sealed face, no matter be the same direction as bad, still contrary poor unevenness that can all cause sealed face, and the sealed face of unevenness will have serious influence to the sealed of sound chamber, and the sound chamber seals bad and can cause the speaker to leak sound and tone quality distortion scheduling problem, seriously influences the user and experiences to mobile terminal's use.

Disclosure of Invention

An aspect of an embodiment of the present application provides a housing assembly, which includes a middle frame and a sound cavity cover plate; the middle frame comprises a main plate body and side plate bodies; the main board body comprises a first surface, a second surface and a plurality of side faces, the first surface and the second surface are arranged in a back-to-back mode, the side faces are connected with the first surface and the second surface, an annular boss is arranged on the first surface, a sound cavity area is formed by the annular boss in a surrounding mode, and the sound cavity cover plate is abutted to the top face of the annular boss to form a sound cavity of the loudspeaker together with the middle frame in a surrounding mode; the top surface of cyclic annular boss the at least side of mainboard body is connected, this side with contained angle between the top surface of cyclic annular boss is the obtuse angle, is equipped with the dovetail on this side, be equipped with dovetail bellying on the curb plate body, the bellying with the dovetail cooperation is realized the mainboard body with the connection of curb plate body.

On the other hand of this application embodiment still provides a mobile terminal, mobile terminal includes speaker and any one of the above-mentioned embodiment the casing subassembly, the speaker is located sound chamber apron with the sound chamber that the center encloses and establishes the formation is intracavity.

The embodiment of the application provides a mobile terminal and casing assembly thereof, through the mainboard body with the center and the position setting of curb plate body injection moulding connection on the side inclined plane position of mainboard body, guarantee the level and smooth of mainboard ring form boss top surface, make mainboard ring form boss can form sealed good sound chamber with sound chamber apron butt, and then guarantee to be located the sound effect of removal terminal speaker in the sound chamber, the improvement of very big degree the user is experienced to mobile terminal's use.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic, partial block diagram illustration of one embodiment of a housing assembly for a mobile terminal according to the present application;

FIG. 2 is a schematic diagram of a disassembled structure of the housing assembly in the embodiment of FIG. 1;

FIG. 3 is a schematic diagram of the structure of a middle frame in the embodiment of FIG. 3;

FIG. 4 is a schematic diagram of the split of the middle box in FIG. 3;

FIG. 5 is an enlarged partial schematic view at position A of FIG. 4;

FIG. 6 is a schematic, partial block diagram illustration of another embodiment of a housing assembly for a mobile terminal according to the present application;

FIG. 7 is a schematic diagram of a disassembled structure of the housing assembly in the embodiment of FIG. 6;

FIG. 8 is a schematic structural view of a rear housing in the embodiment of FIG. 6;

fig. 9 is a schematic front view of the overall structure of an embodiment of the mobile terminal according to the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Likewise, the following examples are only some but not all examples of the present invention, and all other examples obtained by those skilled in the art without any inventive step are within the scope of the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As used herein, a "communication terminal" (or simply "terminal") includes, but is not limited to, a device that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. The mobile phone is a mobile terminal equipped with a cellular communication module.

Referring to fig. 1 and fig. 2 together, fig. 1 is a partial schematic structural diagram of an embodiment of a housing assembly for a mobile terminal according to the present application, and fig. 2 is a schematic structural diagram of a detached portion of the housing assembly in the embodiment of fig. 1; it should be noted that, the mobile terminal in the present application may include electronic devices such as a mobile phone, a tablet computer, a notebook computer, and a wearable device. The case assembly 10 for a mobile terminal in this embodiment includes a middle frame 100 and an acoustic cavity cover plate 200. The term "comprising" in the present invention is intended to cover a non-exclusive inclusion.

Specifically, referring to fig. 3 and fig. 4 together, fig. 3 is a schematic structural diagram of a middle frame in the embodiment of the present invention, fig. 4 is a schematic exploded diagram of the middle frame in fig. 3, and the middle frame 100 includes a main board body 110 and a side board body 120; the side plate 120 is disposed at a side position of the main plate 110. The main board body 110 includes a first surface 111, a second surface (not shown) and a plurality of side surfaces 112 connecting the first surface 111 and the second surface, which are opposite to each other.

Optionally, an annular boss 1111 is arranged on the first surface 111, the annular boss 1111 surrounds to form a sound cavity region 101, and the sound cavity cover plate 200 abuts against the top surface of the annular boss 1111 to surround together with the middle frame 100 to form a sound cavity of the speaker; the top surface of the annular protrusion 1111 is connected to at least one side surface of the main plate body 110, in this embodiment, the top surface of the annular protrusion 1111 is connected to one side surface 112 of the main plate body 110, and in other embodiments, the top surface of the annular protrusion 1111 may be connected to a plurality of side surfaces, which is within the understanding of those skilled in the art and will not be described in detail herein. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Referring to fig. 5, fig. 5 is a partially enlarged schematic view of a position a in fig. 4, an included angle between the side surface 112 and the top surface 1110 of the annular boss 1111 is an obtuse angle, and the side surface 112 is provided with a dovetail groove 1121, wherein the number of the dovetail grooves 1121 may be one or more; the side plate body 120 is provided with dovetail-shaped protrusions 121, and the protrusions 121 correspond to the dovetail grooves 1121 in number and position, so as to realize the connection between the main plate body 110 and the side plate body 120 in a matching manner. The dovetail-shaped protrusion 121 is embedded in the dovetail groove 1121, and the dovetail-shaped protrusion 121 is prevented from exceeding the top surface 1110 of the annular boss 1111, so that interference of the dovetail-shaped protrusion 121 on the top surface 1110 of the annular boss 1111 can be avoided, and smoothness of the top surface 1110 of the annular boss 1111 is ensured. All directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Alternatively, the main plate body 110 and the side plate body 120 of the middle frame 100 may be formed by integral injection molding; the main plate 110 may be made of an alloy, such as an aluminum alloy, a magnesium alloy, a titanium alloy, etc.; the material of the side plate 120 may be plastic, such as PC, PVC, TPU, etc. The materials of the main plate body 110 and the side plate body 120 are not listed here within the understanding scope of those skilled in the art.

Referring to fig. 2, the sound cavity cover plate 200 includes a middle plate 210 and a supporting protrusion 220, the supporting protrusion 220 is disposed to abut against the top surface 1110 of the ring-shaped protrusion 1111, and the middle plate 210 covers the sound cavity region 101 of the middle frame 100. The sound cavity cover plate 200 may be made of plastic or alloy, and may be made of a material with certain strength and toughness, such as PC, aluminum alloy, magnesium alloy, PVC, TPU, and the like.

Optionally, a sealing gasket 300 is interposed between the supporting protrusion 220 and the top surface 1110 of the annular boss 1111, and the sealing gasket 300 is annularly disposed between the supporting protrusion 220 and the top surface 1110 of the annular boss 1111 and is used for forming a seal between the supporting protrusion 220 and the top surface 1110 of the annular boss 1111 to form a sealed sound cavity.

With reference to fig. 2 and fig. 4, the supporting protrusion 220 of the sound cavity cover plate 200 is provided with a first sound outlet groove 221, the bottom of the first sound outlet groove 221 is provided with a positioning rib 222, and the positioning rib 222 is positioned in cooperation with the dovetail-groove-formed side surface 112 of the main plate body 110 of the middle frame 100. The side plate body 120 of the middle frame 100 is provided with a second sound outlet groove 122, and the second sound outlet groove 122 is arranged opposite to the first sound outlet groove 221 to form a sound outlet channel. It should be noted that the terms "first", "second" and "third" in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature.

Optionally, a dust screen 400 is further disposed between the first sound outlet groove 221 of the supporting protrusion 220 of the sound cavity cover plate 200 and the second sound outlet groove 122 of the side plate body 120, and the dust screen 400 is used for preventing dust between the first sound outlet groove 221 of the supporting protrusion 220 and the second sound outlet groove 122 of the side plate body 120.

Further, with reference to fig. 4 and fig. 5, a connecting table 114 is further disposed on a side surface of the main plate 110, the connecting table 114 is connected to the side surface 112 of the main plate 110 having the dovetail groove 1121, the dovetail groove 1121 penetrates through the connecting table 114 and the side surface 112, and the connecting table 114 is used for leaving a certain thick bottom position on a tail portion of the dovetail-shaped protrusion 121 of the side plate 120, so as to prevent the tail portion of the dovetail-shaped protrusion 121 from being broken due to being too narrow (thin), and further prevent the connection between the side plate 120 and the main plate 110 from being not firm.

The casing subassembly that this embodiment provided, through the mainboard body with the center and the position setting of curb plate body injection molding connection on the side inclined plane position of mainboard body, guarantee the level and smooth of mainboard ring form boss top surface, make mainboard ring form boss can form sealed good sound chamber with sound chamber apron butt, and then guarantee to be located the sound effect of sound intracavity mobile terminal speaker.

Referring to fig. 6 and 7 together, fig. 6 is a partial schematic structural diagram of another embodiment of a housing assembly for a mobile terminal according to the present application, and fig. 7 is a schematic structural diagram of a detached portion of the housing assembly in the embodiment of fig. 6. The housing assembly 10 in this embodiment includes a center frame 100, a sound cavity cover plate 200, and a rear case 500. For detailed technical features of the middle frame 100 and the sound cavity cover 200, reference is made to the related description of the foregoing embodiments, and the present embodiment only provides a detailed description of the structure different from the foregoing embodiments.

The rear housing 500 in this embodiment includes a cover plate 510 and a bending plate 520, which are integrally formed, the cover plate 510 is disposed on the sound cavity cover plate 200, and the middle plate 210 of the sound cavity cover plate 200 is disposed between the cover plate 510 and the middle frame 100; the bending plate 520 surrounds a side of the side plate 120 of the middle frame 100 away from the supporting protrusion 220 of the sound cavity cover plate 200, and a plurality of sound outlet holes 521 corresponding to the second sound outlet grooves 122 of the side plate 120 are formed in the bending plate 520.

Referring to fig. 8, fig. 8 is a schematic structural diagram of the rear housing in the embodiment of fig. 6, a positioning table 522 is disposed on one side of the bending plate 520 of the rear housing 500 close to the middle frame side plate 120, the sound outlet holes 521 extend through the positioning table 522, and the positioning table 522 is inserted into the second sound outlet groove 122 to realize positioning communication between the sound outlet holes 521 and the second sound outlet groove 122. Through the structure of providing the positioning table 522 on the bending plate 520, on one hand, the positioning of the rear case 500 and the middle frame 100 can be realized through the positioning table, and on the other hand, the accurate alignment between the sound outlet 521 and the second sound outlet groove 122 can be ensured.

Further, referring to fig. 8, the sound holes 521 are all stepped holes, and the aperture of the stepped hole near the side plate 120 is larger than the aperture of the stepped hole far from the side plate 120, so that the sound holes 521 of this structure can form a sound gathering structure on one hand, so that sound is transmitted into the sound holes 521 as much as possible; on the other hand, one end of the sound outlet hole 521 communicated with the outside has a smaller aperture, so that a certain dustproof effect can be achieved, and the situation that sundries are more easily introduced into the sound outlet hole 521 due to the fact that the opening is too large and the sound outlet hole 521 is blocked is avoided.

According to the shell assembly provided by the embodiment, the position of injection molding connection between the main plate body and the side plate body of the middle frame is arranged on the side slope position of the main plate body, so that the top surface of the annular boss of the main plate body is ensured to be smooth, the annular boss of the main plate body can be abutted against the sound cavity cover plate to form a sound cavity with good sealing, the sound effect of the mobile terminal loudspeaker in the sound cavity is further ensured, and the use experience of a user on mobile terminal equipment is greatly improved; in addition, through setting up the rear shell structure, can improve shell body assembly's bulk strength, form the play sound passageway of counterpointing the accuracy.

Referring to fig. 9, fig. 9 is a schematic front view of an overall structure of a mobile terminal according to an embodiment of the present disclosure, where the mobile terminal in the embodiment may include electronic devices such as a mobile phone, a tablet computer, a notebook computer, and a wearable device. The present embodiment is described by taking a mobile phone as an example. The mobile terminal may include a speaker (not shown), a display 20 and a housing assembly 10, wherein the speaker is disposed in a sound cavity formed by the sound cavity cover 200 of the housing assembly 10 and the middle frame 100. For the detailed structural features of the housing assembly 10, reference is made to the related description of the foregoing embodiments, and the detailed features of the structure of other parts of the mobile terminal are within the understanding of those skilled in the art and will not be described herein.

The mobile terminal that this embodiment provided, its casing subassembly is through the mainboard body with the center and the position setting of curb plate body injection molding connection on the side inclined plane position of mainboard body, guarantees the level and smooth of mainboard ring form boss top surface, makes mainboard ring form boss can form sealed good sound chamber with sound chamber apron butt, and then guarantees to be located the sound effect of mobile terminal speaker in the sound chamber, the improvement of very big degree the user is experienced to mobile terminal's use.

The above description is only a part of the embodiments of the present invention, and not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes performed by the present invention through the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A housing assembly, comprising a center frame and a sound cavity cover plate; the middle frame comprises a main plate body and side plate bodies; the main board body comprises a first surface, a second surface and a plurality of side faces, the first surface and the second surface are arranged in a back-to-back mode, the side faces are connected with the first surface and the second surface, an annular boss is arranged on the first surface, a sound cavity area is formed by the annular boss in a surrounding mode, and the sound cavity cover plate is abutted to the top face of the annular boss to form a sound cavity of the loudspeaker together with the middle frame in a surrounding mode; the top surface of the annular boss is connected with at least one side surface of the main plate body, an included angle between the side surface and the top surface of the annular boss is an obtuse angle, the top surface of the annular boss is a plane, and the side surface is an inclined surface; the side surface is provided with a dovetail groove, the side plate body is provided with a dovetail-shaped convex part, and the convex part is matched with the dovetail groove to realize the connection of the main plate body and the side plate body; the bulge is embedded in the dovetail groove and does not exceed the top surface of the annular boss.

2. The housing assembly of claim 1, wherein the main plate body and the side plate body of the middle frame are formed by integral injection molding; the main plate body is made of alloy, and the side plate body is made of plastic.

3. The housing assembly of claim 1, wherein the sound cavity cover plate comprises a middle plate and a supporting protrusion, the middle plate and the supporting protrusion are integrally formed, the supporting protrusion is arranged in an abutting mode with the top surface of the annular boss, and the middle plate covers the sound cavity area of the middle frame.

4. The housing assembly of claim 3, wherein a sealing gasket is sandwiched between the support protrusion and the top surface of the annular boss.

5. The housing assembly of claim 4, wherein the supporting protrusion of the sound cavity cover plate is provided with a first sound outlet groove, the bottom of the sound outlet groove is provided with a positioning rib, and the positioning rib is matched and positioned with the side surface of the main plate body of the middle frame, which is provided with the dovetail groove; and a second sound outlet groove is formed in the side plate body of the middle frame, and the second sound outlet groove is opposite to the first sound outlet groove.

6. The housing assembly of claim 5, wherein a dust screen is disposed between the first sound outlet groove of the support protrusion and the second sound outlet groove of the side plate.

7. The housing assembly of claim 1, wherein the side of the main plate body is further provided with a connecting platform, the connecting platform is connected with the side of the main plate body provided with a dovetail groove, and the dovetail groove penetrates through the connecting platform and the side.

8. The housing assembly of claim 6, further comprising a rear housing, wherein the rear housing comprises a cover plate and a bending plate, the cover plate is integrally formed, the cover plate is covered on the sound cavity cover plate, and the middle plate of the sound cavity cover plate is arranged between the cover plate and the middle frame; the bending plate surrounds one side of the middle frame side plate body, which is far away from the supporting bulge of the sound cavity cover plate, and a plurality of sound outlet holes corresponding to the second sound outlet grooves of the side plate body are formed in the bending plate.

9. The casing assembly of claim 8, wherein a positioning platform is disposed on a side of the bending plate close to the side plate of the middle frame, the plurality of sound outlet holes are disposed through the positioning platform, and the positioning platform is inserted into the second sound outlet groove to achieve positioning communication between the plurality of sound outlet holes and the second sound outlet groove.

10. The housing assembly of claim 9, wherein the sound holes are stepped holes, and the diameter of the stepped holes is larger at a side close to the side plate than at a side far from the side plate.

11. A mobile terminal, characterized in that the mobile terminal comprises a speaker and the housing assembly of any one of claims 1 to 10, wherein the speaker is disposed in a sound cavity formed by the sound cavity cover plate and the middle frame.