Mobile phone and back cover thereof

Abstract

The present application discloses a mobile phone and a back cover thereof. The back cover can be applied to the mobile phone. The mobile phone is provided with an open-type speaker and a speaker housing for mounting the open-type speaker, and the back cover comprises a back cover body and an enclosing structure. The back cover body, as a whole, is plate-shaped and has a predetermined thickness, and the back cover body has a first surface facing the speaker housing and a second surface opposite to the first surface. The enclosing structure is a circumferentially closed structure, and the enclosing structure is arranged on the first surface and matches the outer contour of the speaker housing. The enclosing structure works in conjunction with the back cover body and the speaker housing to form a cavity for mounting an acoustic medium. The present application can solve the resonance problem of back covers, and can also conveniently and effectively provide an acoustic reinforcing material in the cavity formed between the speaker housing and the back cover.

Description

Mobile phone and its back cover

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202422790420.6, filed on November 15, 2024, and incorporates the entire contents of the disclosure of the aforementioned patent application as part of this application. Technical Field

[0003] This application relates to the technical field of electronic products equipped with speakers, and particularly to a mobile phone and its back cover. Background Technology

[0004] As an energy conversion device, the loudspeaker structure is an important acoustic component of electronic devices, used to convert electrical signals into sound signals.

[0005] With the increasing prevalence of open-back speakers on the market, the problems arising from their design are becoming more and more prominent. Especially in portable electronic devices such as mobile phones, in order to save space, semi-open speakers are often used and sealed directly with the back cover. However, the back cover has a large area, and the speaker is prone to resonance during operation. This may not only affect the acoustic effect, but also have a negative impact on the performance of the electronic device.

[0006] Furthermore, such structures are often quite complex, which can hinder the filling and bonding of acoustic reinforcement materials, potentially limiting the space available when improved product performance is required. Therefore, effectively filling or bonding these acoustic reinforcement materials within these loudspeakers presents a challenge.

[0007] Therefore, it is necessary to propose a mobile phone and its back cover to solve at least one of the above problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this application provides a mobile phone and its back cover, which solves the back cover resonance problem and allows for the convenient and effective placement of acoustic reinforcement materials in the cavity formed between the speaker housing and the back cover.

[0009] The specific technical solution of the embodiments of this application is as follows:

[0010] One embodiment of this application provides a back cover applicable to a mobile phone, the mobile phone having an open-back speaker and a speaker housing for mounting the open-back speaker. The back cover includes a back cover body and a retaining structure. The back cover body is generally plate-shaped with a predetermined thickness, and has a first surface facing the speaker housing and a second surface opposite to the first surface. The retaining structure is circumferentially closed, disposed on the first surface and adapted to the outer contour of the speaker housing; the retaining structure, together with the back cover body and the speaker housing, forms a cavity for mounting an acoustic medium.

[0011] In an optional embodiment, a seal is further provided between the enclosure structure and the speaker housing.

[0012] In one alternative implementation, the enclosure structure is divided into multiple independent chambers, the multiple independent chambers including a first chamber for housing an acoustic medium.

[0013] In an alternative embodiment, the first chamber has an open end facing the speaker housing, and the open end is provided with a barrier layer that allows sound to pass through but does not allow acoustic media to pass through.

[0014] In one alternative implementation, the stop layer is a mesh fabric or a non-woven fabric.

[0015] In one alternative embodiment, the acoustic medium has an encapsulation body on its exterior, the encapsulation body being fixed to a first surface of the back cover body.

[0016] In an optional embodiment, an adhesive layer is provided between the package and the first surface, the adhesive layer being made of pressure-sensitive adhesive or adhesive.

[0017] In an optional embodiment, the enclosure structure is further provided with an acoustic enhancement section for improving the acoustic performance of the open loudspeaker.

[0018] In one optional embodiment, the acoustic reinforcement is in the form of a block or sheet with a predetermined size, and an adhesive layer is provided between the acoustic reinforcement and the first surface of the back cover body, the adhesive layer being made of pressure-sensitive adhesive or adhesive.

[0019] In one optional embodiment, the enclosure structure is integrally formed and disposed in a predetermined area on the first surface of the back cover body, or the enclosure structure is a sealing strip disposed in a predetermined area on the first surface of the back cover body.

[0020] In one alternative embodiment, the back cover body has opposing length directions, and along the length direction, the back cover body has opposing first and second ends, the enclosure structure is disposed near the first end of the back cover body, and the outline of the enclosure structure matches the outer outline of the back cover body near the first end.

[0021] Another embodiment of this application provides a mobile phone, the mobile phone including any of the back covers described above, the mobile phone further including: a mobile phone body, an open speaker and a speaker housing, the open speaker also being installed in the cavity formed by the back cover, the enclosure structure and the speaker housing.

[0022] The technical solution of this application embodiment has the following significant beneficial effects:

[0023] In this embodiment, by providing a baffle structure on the first surface of the back cover body facing the speaker housing, the back cover has a semi-cavity structure with one end open. This semi-cavity structure is combined with an open speaker. Specifically, the baffle structure is sealed to the edge of the speaker housing, thereby forming a relatively sealed cavity. The vibration of this cavity does not directly act on the back cover, thus solving the problem of back cover resonance. In addition, the cavity can be used to install acoustic media, thereby achieving the purpose of providing an independent space for filling and utilizing acoustic media (acoustic enhancement material) in the complex rear cavity of the speaker.

[0024] Specific embodiments of this application are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of this application can be adopted. It should be understood that the embodiments of this application are not limited in scope. Within the spirit and scope of the appended claims, embodiments of this application include many changes, modifications, and equivalents. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0025] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this application in any way. Furthermore, the shapes and scales of the components in the drawings are merely illustrative to aid in understanding this application and do not specifically limit the shapes and scales of the components. Those skilled in the art, guided by the teachings of this application, can select various possible shapes and scales to implement this application according to specific circumstances.

[0026] Figure 1 is a structural schematic diagram of a mobile phone provided in an embodiment of this application;

[0027] Figure 2 is a front view of a mobile phone provided in the first and second embodiments of this application;

[0028] Figure 3 is an exploded view of a mobile phone provided in the first and second embodiments of this application;

[0029] Figure 4 is a cross-sectional view of AA in Figure 2;

[0030] Figure 5 is a front view of a mobile phone provided in the third embodiment of this application;

[0031] Figure 6 is an exploded view of a mobile phone provided in the third embodiment of this application;

[0032] Figure 7 is a cross-sectional view of BB in Figure 5;

[0033] Figure 8 is a front view of a mobile phone provided in the third embodiment of this application;

[0034] Figure 9 is an exploded view of a mobile phone provided in the third embodiment of this application;

[0035] Figure 10 is a CC sectional view of Figure 8.

[0036] The reference numerals in this application are as follows: 1. Mobile phone body; 2. Speaker housing; 3. Open-type speaker; 4. Back cover body; 40. First surface; 41. First end; 42. Second end; 5. Enclosure structure; 51. First chamber; 52. Second chamber; 61. Acoustic medium; 62. Acoustic reinforcement; 71. Seal; 72. Stop layer; 81. Encapsulation body. Detailed Implementation

[0037] The technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this application and are not intended to limit the scope of this application. After reading this application, any modifications of this application in various equivalent forms by those skilled in the art fall within the scope defined by the appended claims.

[0038] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] This application provides a mobile phone and its back cover, which solves the back cover resonance problem and allows for convenient and effective placement of acoustic reinforcement material in the cavity formed between the speaker housing and the back cover.

[0041] Please refer to Figures 1 to 10. This application provides a back cover for a mobile phone. This back cover can be applied to mobile phones, and it can also be applied to other portable electronic devices with complex speaker structures, such as tablet computers. In the embodiments and accompanying drawings of this application, the application of this back cover in a mobile phone is mainly used as an example for explanation. Other application scenarios can be referred to by analogy.

[0042] The mobile phone includes a speaker and a speaker housing 2 for mounting the speaker. Specifically, the speaker of the mobile phone can be an open-back speaker 3, which allows sound to diffuse more naturally into the surrounding space.

[0043] The back cover may include: a back cover body 4, which is generally plate-shaped with a predetermined thickness, having a first surface 40 facing the speaker housing 2 and a second surface opposite to the first surface 40; a enclosure structure 5, which is circumferentially closed, disposed on the first surface 40 and adapted to the outer contour of the speaker housing 2; the enclosure structure 5, together with the back cover body 4 and the speaker housing 2, forms a cavity for mounting an acoustic medium 61.

[0044] In this embodiment, by providing a baffle structure 5 on the first surface 40 of the back cover body 4 facing the speaker housing 2, the back cover has a semi-cavity structure with one end open. This semi-cavity structure is combined with an open speaker. Specifically, the baffle structure 5 is sealed to the edge of the speaker housing 2, thereby forming a relatively sealed cavity. The vibration of this cavity does not directly act on the back cover, thus solving the problem of back cover resonance. In addition, the acoustic medium 61 can be installed in this cavity, thereby achieving the purpose of providing an independent space for filling and utilizing the acoustic medium 61 (acoustic enhancement material) in the complex speaker rear cavity.

[0045] In this application, the speaker module transmits sound by driving the diaphragm to vibrate via an electrical signal during operation. However, the vibration of the diaphragm also causes the speaker module itself to vibrate (vibration is transmitted through a solid). If a complete module with a rear cavity housing is assembled in a mobile phone, the rear cavity housing is in direct contact with the back cover of the phone, and the back cover will also vibrate due to the module. In the embodiment of this application, the vibration of the cavity does not directly act on the back cover, thereby solving the problem of back cover resonance.

[0046] In this embodiment, the back cover body 4 has opposing length directions, and along these length directions, the back cover body 4 has opposing first ends 41 and second ends 42. The bezel structure 5 is disposed at the first end 41 of the back cover body 4, and the outline of the bezel structure 5 matches the outer outline of the back cover body 4 near the first end 41. Specifically, the bezel structure 5 can be a rectangular structure with two rounded corners at the first end 41. Of course, the bezel structure 5 can also be other regular or irregular shapes. Overall, when the bezel structure 5 is constructed in the manner described above, matching the outer outline of the back cover body 4 near the first end 41, it is beneficial to maximize the use of the limited space in the mobile phone.

[0047] To improve the acoustic performance of mobile phones, the speaker rear cavity formed by the speaker housing and the semi-cavity structure formed by the back cover can be combined to form an integrated closed cavity. This application will be described in detail below with reference to different embodiments and accompanying drawings.

[0048] Referring to Figures 1, 2, 3, and 4, in the first embodiment, the back cover may include a back cover body 4 and a retaining structure 5. The retaining structure 5 cooperates with the back cover body 4 to form a semi-cavity structure for the mobile phone back cover, thereby achieving the connection with the speaker housing.

[0049] This structure can be combined with an open-type loudspeaker 3. A seal 71 is provided between the enclosure structure 5 and the loudspeaker housing 2 to ensure sound transmission and isolate external noise. Furthermore, the structure's stability can be ensured by fixing it with screws. The seal 71 can be made of materials such as foam or silicone; alternatively, it can be made of other adhesive materials, thus eliminating the need for screw fixing.

[0050] The first embodiment described above has the following advantages: it has a simple structure, is easy to implement, and can effectively combine the speaker housing with the back cover of the mobile phone.

[0051] Referring to Figures 1, 2, 3, and 4, in the second embodiment, in order to further enhance the acoustic performance based on the first embodiment, an acoustic medium 61 can be inserted into the cavity to more effectively improve the sound quality of the mobile phone.

[0052] The enclosure structure 5 is divided into multiple independent chambers, including a first chamber 51 for housing the acoustic medium 61 and a second chamber 52 directly opposite the open-back speaker 3. A certain gap is formed between the open-back speaker 3 and the back cover.

[0053] Specifically, the first chamber 51 has an open end facing the speaker housing 2, and a barrier layer 72 is provided on the open end that allows sound to pass through but does not allow the acoustic medium 61 to pass through. Specifically, the material of the barrier layer 72 can be a mesh fabric or a non-woven fabric. For example, the acoustic medium 61 can specifically be zeolite particles (an acoustic material commonly used to enhance low-frequency effects), and the particle size of the zeolite particles is larger than the pore size of the barrier layer 72. Of course, the specific type of acoustic medium 61 is not limited to the examples above. Those skilled in the art may make other modifications based on the technical essence of this application, but as long as the function and effect achieved are the same as or similar to those of this application, they should be covered within the scope of protection of this application.

[0054] In this embodiment, by attaching a stop layer 72 (e.g., mesh fabric) to the first chamber 51 of the semi-cavity structure formed by the back cover body 4 and the enclosure structure 5 and filling it with an acoustic medium 61 (e.g., zeolite particles), the sound quality of the mobile phone can be improved more effectively.

[0055] In addition to the advantages of the first embodiment, the second embodiment described above also has the following advantages: The second embodiment can improve the low-frequency effect and provide a better sound quality experience.

[0056] Referring to Figures 5, 6 and 7, in the third embodiment, an encapsulation body 81 filled with an acoustic medium 61 (such as a nano powder pack) can be attached to the back cover with the semi-cavity structure.

[0057] The main difference between the third embodiment and the second embodiment is that the stop layer 72 can be omitted. The acoustic medium 61 is first encapsulated in the encapsulation body 81, and then the encapsulation body 81 is fixed to the mobile phone back cover with the semi-cavity structure. This approach makes it easier to control the distribution and quantity of the acoustic medium 61, while reducing the space occupied inside the mobile phone. Specifically, the encapsulation body 81 can be made of a flexible material, forming a package structure. The acoustic medium 61 can be zeolite particles or other materials. In this embodiment, zeolite particles are used as an example. When the acoustic medium 61 is zeolite particles, the zeolite particles can be first encapsulated in a package and then fixed to the first surface 40 of the back cover body 4. This fixing method can specifically be adhesive bonding. For example, an adhesive layer is provided between the encapsulation body 81 and the first surface 40, and the material of the adhesive layer can include pressure-sensitive adhesive or adhesive glue.

[0058] The unique advantages of the third embodiment described above include: easier control and adjustment of the distribution of the acoustic medium 61, resulting in greater space savings. Furthermore, by housing the acoustic medium 61 within a breathable powder pack, it functions as a separate component. If the speaker's acoustic performance is reduced due to the failure of the acoustic medium 61 (e.g., zeolite particles), the powder pack can be easily removed by simply disassembling the back cover and replaced, making maintenance very convenient and quick.

[0059] Referring to Figures 8, 9, and 10, in the fourth embodiment, an acoustic enhancement part 62 can be provided on the back cover with the semi-cavity mechanism to improve the sound quality of the mobile phone.

[0060] In this embodiment, the enclosure structure 5 may also be provided with an acoustic enhancement section 62 for improving the acoustic performance of the open-type loudspeaker 3. The material of the acoustic enhancement section 62 may be a sound-absorbing material for enhancing a specific frequency range, or a reflective material for improving sound directionality, etc.

[0061] The acoustic enhancement portion 62 can be in the form of a block or sheet of a predetermined size, or other regular or irregular shapes. An adhesive layer can be provided between the acoustic enhancement portion 62 and the first surface 40 of the back cover body 4. The adhesive layer material includes pressure-sensitive adhesive or bonding adhesive. This adhesive layer can fix the acoustic enhancement portion 62 to the first surface 40.

[0062] The unique advantage of the fourth implementation described above is that it provides greater flexibility in selecting the most suitable acoustic enhancement material to meet different sound quality requirements.

[0063] In some embodiments, the enclosure structure 5 is integrally formed and disposed in a predetermined area of ​​the first surface 40 of the back cover body 4, or the enclosure structure 5 is a sealing strip disposed in a predetermined area of ​​the first surface 40 of the back cover body 4.

[0064] In this embodiment, the enclosure structure 5 can be integrally formed in a predetermined area near the first end 41 of the first surface 40 of the back cover body 4. Furthermore, the enclosure structure 5 can also be formed by a sealing strip. Specifically, the sealing strip can be a circumferentially closed structure surrounding the first surface 40 of the back cover body 4. The embodiment where the enclosure structure 5 is formed by a sealing strip is mainly applicable when there is sufficient space between the open-back speaker 3 and the phone back cover exceeding the diameter of the powder particles. In this case, the enclosure structure 5 used to form the semi-cavity structure can be omitted from the phone back cover, and a sealing strip (e.g., foam) can be attached to the corresponding position and combined with the speaker housing 2 for sealing.

[0065] This application also provides a mobile phone, which includes the back cover described above. By setting the back cover, the mobile phone can achieve the technical effects achieved by the back cover implementation method. For details, please refer to the specific description of the above implementation method. This application will not repeat it here.

[0066] In addition to the back cover described in any of the above embodiments, the mobile phone may also include: a mobile phone body 1, an open-back speaker 3, and a speaker housing 2, etc. The open-back speaker 3 is installed in the cavity formed by the back cover, the enclosure structure 5, and the speaker housing 2. Overall, the mobile phone provided in this application embodiment can provide a complete sealed rear cavity for the open-back speaker 3, which facilitates the filling and utilization of acoustic enhancement materials.

[0067] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0068] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0069] The above are merely a few embodiments of this application. Although the embodiments disclosed in this application are as described above, the content is only for the purpose of facilitating understanding of this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this application, but the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A back cover, wherein, The back cover can be used in a mobile phone, the mobile phone having an open-back speaker and a speaker housing for mounting the open-back speaker, the back cover comprising: The back cover body is generally in the shape of a plate with a predetermined thickness, and the back cover body has a first surface facing the speaker housing and a second surface opposite to the first surface; The enclosure structure is circumferentially closed and is disposed on the first surface and adapted to the outer contour of the speaker housing; the enclosure structure, together with the back cover body and the speaker housing, forms a cavity for mounting acoustic media.

2. The back cover of claim 1, wherein, A sealing element is also provided between the enclosure structure and the speaker housing.

3. The back cover of claim 1, wherein, The enclosure structure is divided into multiple independent chambers, including a first chamber for housing an acoustic medium.

4. The back cover of claim 3, wherein, The first chamber has an open end facing the speaker housing, and the open end is provided with a barrier layer that allows sound to pass through but does not allow acoustic media to pass through.

5. The back cover of claim 4, wherein, The stop layer is made of mesh fabric or non-woven fabric.

6. The back cover of claim 1, wherein, The acoustic medium has an encapsulation body on its exterior, and the encapsulation body is fixed to the first surface of the back cover body.

7. The back cover of claim 6, wherein, An adhesive layer is provided between the package and the first surface, and the material of the adhesive layer includes pressure-sensitive adhesive or adhesive.

8. The back cover of claim 1, wherein, The enclosure structure also includes an acoustic enhancement section for improving the acoustic performance of the open loudspeaker.

9. The back cover of claim 8, wherein, The acoustic enhancement part is in the form of a block or sheet with a predetermined size, and an adhesive layer is provided between the acoustic enhancement part and the first surface of the back cover body. The material of the adhesive layer includes pressure-sensitive adhesive or adhesive.

10. The back cover of claim 1, wherein, The enclosure structure is integrally formed and disposed in a predetermined area on the first surface of the back cover body, or the enclosure structure is a sealing strip disposed in a predetermined area on the first surface of the back cover body.

11. The back cover of claim 1, wherein, The back cover body has a relative length direction, and along the length direction, the back cover body has a relative first end and a second end. The enclosure structure is disposed near the first end of the back cover body, and the outline of the enclosure structure matches the outer outline of the back cover body near the first end.

12. A handset, wherein, The mobile phone includes the back cover as described in any one of claims 1 to 11, and the mobile phone further includes: a mobile phone body, an open speaker and a speaker housing, wherein the open speaker is also installed in the cavity formed by the back cover, the enclosure structure and the speaker housing.

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