Mobile phone and back cover thereof

Abstract

The utility model 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 loudspeaker and a loudspeaker housing used for installing the open-type loudspeaker, the back cover comprises a back cover body, the whole back cover body is in a plate shape with a predetermined thickness, and the back cover body is provided with a plurality of through holes. The back cover body is provided with a first surface facing the loudspeaker shell and a second surface opposite to the first surface; the enclosure structure is of a circumferentially closed structure, and the enclosure structure is arranged on the first surface and is matched with the outer contour of the loudspeaker shell; and the enclosure structure is matched with the back cover body and the loudspeaker shell to form a cavity for mounting an acoustic medium. According to the loudspeaker, the acoustic reinforcing material can be conveniently and effectively arranged in the cavity formed between the loudspeaker shell and the back cover while the resonance problem of the back cover is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic products provided with loudspeakers, in particular to a mobile phone and a back cover thereof. Background Art

[0002] As an energy conversion device, the speaker structure is an important acoustic component of electronic equipment and is used to complete the conversion between electrical signals and sound signals.

[0003] As open-back speakers become increasingly common in the market, the challenges associated with their design are becoming increasingly prominent. This is particularly true in portable electronic devices such as mobile phones, where, to save space, semi-open speakers are often used, sealed directly to the back cover. However, the large back cover area makes the speakers prone to resonance during operation, which can not only affect the acoustics but also negatively impact the performance of the electronic device.

[0004] Furthermore, such structures are often complex, which can hinder the filling and fitting of acoustic enhancement materials, potentially preventing them from providing the necessary space when product performance needs to be improved. Therefore, effectively filling or fitting these acoustic enhancement materials into these speakers becomes a challenge.

[0005] Therefore, it is necessary to provide a mobile phone and a back cover thereof to solve at least one of the above problems. Utility Model Content

[0006] In response to the defects of the prior art, the present invention provides a mobile phone and a back cover thereof, which can solve the resonance problem of the back cover while conveniently and effectively setting acoustic enhancement materials in the cavity formed between the speaker housing and the back cover.

[0007] The specific technical solution of the embodiment of the utility model is:

[0008] A back cover can be used in a mobile phone having an open speaker and a speaker housing for mounting the open speaker, the back cover comprising:

[0009] a back cover body, the back cover body being in the shape of a plate with a predetermined thickness as a whole, the back cover body having a first surface facing the speaker housing and a second surface opposite to the first surface;

[0010] The enclosure structure is a circumferentially closed structure, which is arranged on the first surface and adapted to the outer contour of the speaker housing; the enclosure structure cooperates with the back cover body and the speaker housing to form a cavity that can be used to install an acoustic medium.

[0011] In a preferred embodiment, a sealing member is further provided between the enclosure structure and the speaker housing.

[0012] In a preferred embodiment, a plurality of independent chambers are separated in the enclosure structure, and the plurality of independent chambers include a first chamber for arranging an acoustic medium.

[0013] In a preferred embodiment, the first chamber has an open end facing the speaker housing, and a stopper layer is provided on the open end for allowing sound to pass through but not allowing acoustic medium to pass through.

[0014] In a preferred embodiment, the stopping layer is a mesh cloth or a non-woven fabric.

[0015] In a preferred embodiment, the acoustic medium has a packaging body on the outside, and the packaging body is fixed to the first surface of the back cover body.

[0016] In a preferred embodiment, an adhesive layer is provided between the package body and the first surface, and the material of the adhesive layer includes pressure-sensitive adhesive or adhesive glue.

[0017] In a preferred embodiment, an acoustic reinforcement portion for improving the acoustic performance of the open speaker is further provided in the enclosure structure.

[0018] In a preferred embodiment, the acoustic enhancement part is in the shape 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, and the material of the adhesive layer includes pressure-sensitive adhesive or adhesive glue.

[0019] In a preferred embodiment, the enclosure structure is provided in a predetermined area of ​​the first surface of the back cover body by an integral molding method, or the enclosure structure is a sealing strip provided in a predetermined area of ​​the first surface of the back cover body.

[0020] In a preferred embodiment, 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 arranged 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] A mobile phone comprises any of the above-mentioned back covers, and further comprises: a mobile phone body, an open speaker and a speaker housing, wherein the open speaker is also installed in a cavity formed by the back cover, the enclosure structure and the speaker housing.

[0022] The technical solution of the utility model has the following significant beneficial effects:

[0023] In an embodiment of the present application, an enclosure structure is provided on the first surface of the back cover body facing the speaker housing, so that the back cover has a semi-cavity structure with one end open, and the semi-cavity structure is combined with an open speaker. Specifically, the enclosure structure is sealed and docked with the edge of the speaker housing, thereby forming a relatively sealed cavity. The vibration of the cavity does not directly act on the back cover, thereby 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 increasing materials) for the complex structure of the speaker back cavity.

[0024] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many variations, modifications, and equivalents. Features described and / or illustrated 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportional dimensions of the components in the drawings are for illustrative purposes only and are intended to facilitate understanding of the present invention. They are not intended to limit the shapes and proportional dimensions of the components of the present invention. Those skilled in the art, guided by the present invention, may select various possible shapes and proportional dimensions to implement the present invention, depending on the specific circumstances.

[0026] Figure 1 A schematic structural diagram of a mobile phone provided in an embodiment of the present application;

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

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

[0029] Figure 4 for Figure 2 AA section view in;

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

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

[0032] Figure 7 for Figure 5 BB cross-sectional view in;

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

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

[0035] Figure 10 for Figure 8 CC section view in.

[0036] Reference numerals of this application:

[0037] 1. Mobile phone body;

[0038] 2. Speaker housing;

[0039] 3. Open speakers;

[0040] 4. Back cover body; 40. First surface; 41. First end; 42. Second end;

[0041] 5. Enclosure structure; 51. First chamber; 52. Second chamber;

[0042] 61. Acoustic medium;

[0043] 62. Acoustic enhancement department;

[0044] 71. Seals;

[0045] 72. Stop layer;

[0046] 81. Encapsulation. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0048] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0050] The utility model provides a mobile phone and a back cover thereof, which can solve the resonance problem of the back cover and conveniently and effectively arrange acoustic enhancement material in a cavity formed between a loudspeaker housing and the back cover.

[0051] Please refer to the comprehensive Figures 1 to 10 The embodiments of this application provide a mobile phone back cover. The back cover can be used in mobile phones. Of course, the back cover can also be used in other portable electronic devices with speakers with complex structures similar to mobile phones, such as tablet computers. In the embodiments and drawings of this application, the back cover is mainly used in the scenario of mobile phone application as an example for explanation. Other application scenarios can be referred to in this application by analogy.

[0052] For a mobile phone, it has a speaker and a speaker housing 2 for mounting the speaker, etc. Specifically, the speaker of the mobile phone can be an open speaker 3, so that the sound can be diffused to the surrounding space more naturally.

[0053] The back cover may include: a back cover body 4, which is in the shape of a plate with a predetermined thickness as a whole, and has a first surface 40 facing the speaker housing 2 and a second surface opposite to the first surface 40; an enclosure structure 5, which is a circumferentially closed structure, and is arranged on the first surface 40 and is adapted to the outer contour of the speaker housing 2; the enclosure structure 5 cooperates with the back cover body 4 and the speaker housing 2 to form a cavity that can be used to install an acoustic medium 61.

[0054] In an embodiment of the present application, a retaining structure 5 is provided on the first surface 40 of the back cover body 4 facing the speaker housing 2, so that the back cover has a semi-cavity structure with one end open, and the semi-cavity structure is combined with an open speaker. Specifically, the retaining structure 5 is sealed and docked with the edge of the speaker housing 2, so as to form a relatively sealed cavity. The vibration of the cavity does not directly act on the back cover, thereby solving the problem of back cover resonance; in addition, the cavity can be used to install the acoustic medium 61, thereby achieving the purpose of providing an independent space for the complex structure of the speaker back cavity to fill and utilize the acoustic medium 61 (acoustic increasing material).

[0055] During operation, the speaker module uses electrical signals to drive the diaphragm to vibrate and transmit sound. However, the vibration of the diaphragm also causes the speaker module itself to vibrate (vibration is conducted on a solid body). 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 is also driven to vibrate by the module. However, in the embodiment of the present application, the vibration of the cavity does not directly act on the back cover, thereby solving the problem of back cover resonance.

[0056] In this embodiment, the back cover body 4 has a relative length direction, and along the length direction, the back cover body 4 has a first end 41 and a second end 42 relative to each other. The enclosure structure 5 is provided at the first end 41 of the back cover body 4, and the outline of the enclosure structure 5 matches the outer outline of the back cover body 4 near the first end 41. Specifically, the enclosure structure 5 can be a rectangular structure with two rounded corners formed at the first end 41. Of course, the enclosure structure 5 can also be other regular or irregular shapes. Overall, when the enclosure structure 5 is the above-mentioned structure that matches the outer outline of the back cover body 4 near the first end 41, it is conducive to maximizing the use of the limited space in the mobile phone.

[0057] In order to improve the acoustic performance of the mobile phone, the speaker rear cavity formed by the mobile phone speaker housing and the semi-cavity structure formed by the mobile phone back cover can be combined to form an integrated closed cavity. The following will describe this application in detail with reference to different embodiments and drawings.

[0058] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In the first embodiment, the back cover may include a back cover body 4 and an enclosure structure 5, and the enclosure structure 5 cooperates with the back cover body 4 to form a mobile phone back cover with a semi-cavity structure, thereby realizing combination with the speaker shell.

[0059] This structure can be combined with an open speaker 3. A seal 71 is provided between the enclosure structure 5 and the speaker housing 2 to ensure sound transmission and isolate external noise. Furthermore, screws can be used to ensure structural stability. The seal 71 can be made of materials such as foam or silicone. Alternatively, other adhesive materials can be used, eliminating the need for screws.

[0060] The first embodiment has the following advantages: simple structure, easy implementation, and the ability to effectively combine the speaker housing with the back cover of the mobile phone.

[0061] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In the second embodiment, in order to further enhance the acoustic performance based on the first embodiment, an acoustic medium 61 may be placed in the cavity, thereby more effectively improving the sound quality of the mobile phone.

[0062] The enclosure structure 5 is divided into a plurality of independent chambers, including a first chamber 51 for arranging an acoustic medium 61 and a second chamber 52 facing the open speaker 3. A certain gap is formed between the open speaker 3 and the back cover.

[0063] Specifically, the first chamber 51 has an open end facing the speaker housing 2, and the open end is provided with a stop layer 72 that allows sound to pass through but does not allow the acoustic medium 61 to pass through. Specifically, the material of the stop layer 72 can be a mesh cloth 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 stop layer 72. Of course, the specific type of the acoustic medium 61 is not limited to the above examples. Technicians in the relevant field may make other changes based on the technical essence of this application, but as long as the functions and effects achieved are the same or similar to those of this application, they should be covered within the scope of protection of this application.

[0064] In this embodiment, by attaching a stop layer 72 (such as mesh) to the first cavity 51 of the semi-cavity structure formed by the back cover body 4 and the enclosure structure 5 and injecting an acoustic medium 61 (such as zeolite particles), the sound quality of the mobile phone can be more effectively improved.

[0065] In addition to the advantages of the first embodiment, the above-mentioned second embodiment also has the following advantages: Advantages of the above-mentioned method 2: It can enhance the low-frequency effect and provide a better sound quality experience.

[0066] Please refer to Figure 5 、 Figure 6 and Figure 7 In the third embodiment, a package 81 (eg, a nanopowder bag, etc.) filled with an acoustic medium 61 may be attached to the back cover with the semi-cavity structure.

[0067] The main difference between the third embodiment and the second embodiment mentioned above is that the stop layer 72 can be eliminated, and the acoustic medium 61 can be first encapsulated in the encapsulation body 81, and then the encapsulation body 81 is fixed on the back cover of the mobile phone with a semi-cavity structure. The advantage of doing so is that it is easier to control the distribution and quantity of the acoustic medium 61, while reducing the space occupied by the internal space of the mobile phone. Specifically, the material of the encapsulation body 81 can be made of a flexible material to form a bag (capsule) structure. The acoustic medium 61 can be zeolite particles or other materials. In the embodiment of the present application, zeolite particles are used as an example for illustration. When the acoustic medium 61 is zeolite particles, the zeolite particles can be first encapsulated in a bag (capsule) and then fixed to the first surface 40 of the back cover body 4. Among them, the fixing method can specifically be in the form of bonding. For example, an adhesive layer is provided between the encapsulation body 81 and the first surface 40, wherein the material of the adhesive layer can include a pressure-sensitive adhesive or an adhesive glue.

[0068] The third embodiment described above offers unique advantages: It facilitates control and adjustment of the distribution of acoustic medium 61, further conserving space. Furthermore, by enclosing acoustic medium 61 in a breathable powder bag, it functions as a single component. If the acoustic medium 61 (e.g., zeolite particles) fails, degrading the speaker's acoustic performance, the powder bag can be removed by simply removing the back cover and replaced, making maintenance extremely convenient and quick.

[0069] Please refer to Figure 8 、 Figure 9 and Figure 10 In the fourth embodiment, an acoustic enhancement portion 62 may be provided on the back cover with the semi-cavity mechanism to improve the sound quality of the mobile phone.

[0070] In this embodiment, an acoustic reinforcement portion 62 for improving the acoustic performance of the open speaker 3 may be further provided in the enclosure structure 5. The acoustic reinforcement portion 62 may be made of a sound-absorbing material for enhancing a specific frequency range or a reflective material for improving sound directionality.

[0071] The acoustic enhancement portion 62 may be in the form of a block or sheet of predetermined size, or other regular or irregular shapes. An adhesive layer may be provided between the acoustic enhancement portion 62 and the first surface 40 of the back cover body 4. The adhesive layer may be made of a pressure-sensitive adhesive or adhesive. The acoustic enhancement portion 62 may be secured to the first surface 40 via the adhesive layer.

[0072] The fourth embodiment has the following advantages: it provides greater flexibility in selecting the most suitable acoustic enhancement material to meet different sound quality requirements.

[0073] In some embodiments, the enclosure structure 5 is provided in a predetermined area of ​​the first surface 40 of the back cover body 4 by an integral molding manner, or the enclosure structure 5 is a sealing strip provided in a predetermined area of ​​the first surface 40 of the back cover body 4 .

[0074] In this embodiment, the enclosure structure 5 can be arranged in a predetermined area near the first end 41 of the first surface 40 of the back cover body 4 in an integrally formed manner. In addition, the enclosure structure 5 can also be formed by surrounding it with a sealing strip. Specifically, the sealing strip can be a circumferentially closed structure surrounded by the first surface 40 of the back cover body 4. The above-mentioned embodiment in which the enclosure structure 5 is formed by surrounding it with a sealing strip can be mainly used in: when there is enough space between the open speaker 3 and the back cover of the mobile phone that exceeds the diameter of the powder particles, at this time, the back cover of the mobile phone can cancel the enclosure structure 5 used to form a semi-cavity structure, and a sealing strip (such as foam) can be affixed at the corresponding position to seal it in combination with the speaker housing 2.

[0075] A mobile phone is also provided in an embodiment of the present application, and the mobile phone includes the above-mentioned back cover. The mobile phone can achieve the technical effect achieved by the back cover embodiment by setting the back cover. For details, please refer to the specific description of the above-mentioned embodiment, and this application will not repeat it here.

[0076] In addition to the back cover described in any of the above embodiments, the mobile phone may further include: a mobile phone body 1, an open speaker 3, and a speaker housing 2. The open speaker 3 is installed in a cavity formed by the back cover, the enclosure structure 5, and the speaker housing 2. Overall, the mobile phone provided in the embodiments of the present application can provide a complete and sealed rear cavity for the open speaker 3, facilitating the filling and utilization of acoustic enhancement materials.

[0077] It should be noted that, in the description of this application, the terms "first," "second," etc., are used solely for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, nor should they be understood to indicate or imply relative importance. Furthermore, in the description of this application, unless otherwise specified, "plurality" means two or more.

[0078] The above-mentioned various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0079] The above are only a few embodiments of the present invention. Although the embodiments disclosed in the present invention are as above, the contents are only for the purpose of facilitating the understanding of the present invention and are not intended to limit the present invention. Any person skilled in the art of the present invention may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in the present invention. However, the scope of patent protection of the present invention shall still be based on the scope defined by the appended claims.

Claims

1. A back cover, characterized in that: The back cover can be applied to a mobile phone having an open speaker and a speaker housing for mounting the open speaker, and the back cover comprises: a back cover body, the back cover body being in the shape of a plate with a predetermined thickness as a whole, the back cover body having a first surface facing the speaker housing and a second surface opposite to the first surface; The enclosure structure is a circumferentially closed structure, which is arranged on the first surface and adapted to the outer contour of the speaker housing; the enclosure structure cooperates with the back cover body and the speaker housing to form a cavity that can be used to install an acoustic medium.

2. The back cover according to claim 1, wherein: A sealing member is further provided between the enclosure structure and the speaker housing.

3. The back cover according to claim 1, wherein: A plurality of independent chambers are separated in the enclosure structure, and the plurality of independent chambers include a first chamber for arranging an acoustic medium.

4. The back cover according to claim 3, wherein: The first chamber has an open end facing the speaker housing, and a stopper layer is provided on the open end for allowing sound to pass through but not allowing acoustic medium to pass through.

5. The back cover according to claim 4, wherein: The stopping layer is mesh cloth or non-woven fabric.

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

7. The back cover according to claim 6, wherein: An adhesive layer is provided between the packaging body and the first surface, and the material of the adhesive layer includes pressure-sensitive adhesive or adhesive glue.

8. The back cover according to claim 1, wherein: An acoustic enhancement portion for improving the acoustic performance of the open speaker is also provided in the enclosure structure.

9. The back cover according to claim 8, wherein: The acoustic enhancement part is in the shape of a block or sheet with a predetermined size. 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 glue.

10. The back cover according to claim 1, wherein: The enclosure structure is provided in a predetermined area of ​​the first surface of the back cover body by an integral molding method, or the enclosure structure is a sealing strip provided in a predetermined area of ​​the first surface of the back cover body.

11. The back cover according to 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 arranged 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 mobile phone, characterized in that: The mobile phone includes the back cover according to any one of claims 1 to 11, and further includes: a mobile phone body, an open speaker and a speaker housing, and the open speaker is also installed in a cavity formed by the back cover, the enclosure structure and the speaker housing.

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