Patent Application
20240323613
This application claims priority to Chinese Patent Application No. 202110723281.3, filed with the China National Intellectual Property Administration on Jun. 29, 2021 and entitled “CORE, SPEAKER MODULE, AND ELECTRONIC DEVICE”, and claims priority to Chinese Patent Application No. 202110938483.X, filed with the China National Intellectual Property Administration on Aug. 16, 2021 and entitled “CORE, SPEAKER MODULE, AND ELECTRONIC DEVICE”, which are incorporated herein by reference in their entireties.
This application relates to the technical field of electronic devices, and in particular to a core, a speaker module, and an electronic device.
At present, electronic devices such as a personal computer (personal computer, PC), a tablet, and a mobile phone are to be designed increasingly thin to meet consumption requirements. In addition, with a higher consumption requirement, these electronic devices are also to achieve better sound effect experience. For an electronic device in the conventional technology, a thinner speaker module is to be designed to implement lightweight design, but a thicker speaker module is to be designed to achieve a larger vibration amplitude, to achieve better sound effect experience. Therefore, thinness and audio performance cannot be balanced for the electronic devices in the conventional technology.
Embodiments of this application provide a core, a speaker module, and an electronic device, to balance thinning and audio performance of a device.
To achieve the foregoing objective, the following technical solutions are used in the embodiments of this application.
According to a first aspect, some embodiments of this application provide a core. The core includes a diaphragm assembly, a first voice coil set, a second voice coil set, and a magnetic circuit system. The first voice coil set, the second voice coil set, and the magnetic circuit system are located on a same side of the diaphragm assembly, and the first voice coil set and the second voice coil set are fastened to the diaphragm assembly. The magnetic circuit system includes a magnet assembly. The magnet assembly includes a first central magnet, a second central magnet, and a side magnet. The first central magnet is disposed to be spaced apart from the second central magnet. The side magnet is circumferentially disposed around a central magnet set including the first central magnet and the second central magnet. A magnetization direction of the second central magnet is the same as a magnetization direction of the first central magnet. A magnetization direction of the side magnet is opposite to the magnetization direction of the first central magnet. An inner magnetically conductive part is disposed in a gap between the first central magnet and the second central magnet. A first annular magnetic gap is formed between the side magnet, the inner magnetically conductive part, and the first central magnet. A second annular magnetic gap is formed between the side magnet, the inner magnetically conductive part, and the second central magnet. At least a part of the first voice coil set extends into the first annular magnetic gap. At least a part of the second voice coil set extends into the second annular magnetic gap. The first voice coil set and the second voice coil set cooperate with the magnetic circuit system to synchronously drive the diaphragm assembly to vibrate.
For the core provided in this application, designing two voice coils enables the number of turns of voice coils to be far greater than the number of turns of a single voice coil, and a winding length of the voice coils to be longer. As the winding length L of the voice coils is increased, a corresponding power conversion coefficient BL is greater, and a driving force BLi of a speaker module is greater. In addition, on the premise that the driving force remains unchanged, a thickness of a voice coil set and a thickness of the magnetic circuit system may be reduced, to implement a thinning design of the core. Therefore, thinning and audio performance can be balanced to some extent for the core provided in this application. In addition, driven by two voice coils, follow performance of parts of the diaphragm is good. This can not only meet a low frequency requirement, but also meet a high frequency requirement. Therefore, a high-frequency speaker module is not to be disposed in the electronic device. This can simplify a structure of the electronic device. In addition, voice coil mass Mms of the two voice coils is relatively large, and a BL of a multi-path magnetic circuit and the two voice coils are relatively large, to enable the speaker module to have a lower Fo and a larger amplitude. Therefore, better low-frequency performance and low-frequency sensitivity are obtained, a capability of playing sound on speaker is increased by 2 dB to 3 dB, greatly improving effect of playing sound on speaker.
In a possible implementation of the first aspect, the magnet assembly further includes an inner magnet. The inner magnet is disposed in a gap between the first central magnet and the second central magnet. The inner magnet forms an inner magnetically conductive part. The inner magnet is magnetic, and can improve a magnetic field strength of a magnetic loop, to increase a driving force.
In a possible implementation of the first aspect, the side magnet includes a first side magnet, a second side magnet, a third side magnet, and a fourth side magnet. The first side magnet and the second side magnet are respectively disposed on two opposite sides of the central magnet set. An arrangement direction of the first side magnet and the second side magnet is the same as an arrangement direction of the first central magnet and the second central magnet in the central magnet set. The third side magnet and the fourth side magnet are respectively disposed on the other two opposite sides of the central magnet set. An arrangement direction of the third side magnet and the fourth side magnet is perpendicular to an arrangement direction of the first central magnet and the second central magnet in the central magnet set. The side magnets are laid out properly and have a proper quantity, which can reduce structural complexity of the magnetic circuit system while ensuring a magnetic field strength.
In a possible implementation of the first aspect, the inner magnet is located between the third side magnet and the fourth side magnet. The inner magnet includes a first inner magnet segment and a second inner magnet segment. The first inner magnet segment is disposed close to the third side magnet and integrally formed with the third side magnet. The second inner magnet segment is disposed close to the fourth side magnet and integrally formed with the fourth side magnet. In this way, the magnet assembly includes a relatively small quantity of magnets. This helps to reduce structure composition complexity of the magnet assembly.
In a possible implementation of the first aspect, the inner magnet is integrally formed with the third side magnet and the fourth side magnet. In this way, the magnet assembly includes a relatively small quantity of magnets. This helps to reduce structure composition complexity of the magnet assembly.
In a possible implementation of the first aspect, the magnetic circuit system further includes a first magnetically conductive yoke and a second magnetically conductive yoke. The first magnetically conductive yoke is disposed on a surface, close to the diaphragm assembly, of the magnet assembly. The second magnetically conductive yoke is disposed on a surface, away from the diaphragm assembly, of the magnet assembly. The first magnetically conductive yoke is magnetically connected to the second magnetically conductive yoke in a gap between the first central magnet and the second central magnet to form the inner magnetically conductive part. This structure is simple and easy to implement.
In a possible implementation of the first aspect, the first magnetically conductive yoke includes a first central magnetically conductive yoke, a second central magnetically conductive yoke, an edge magnetically conductive yoke, and an inner magnetically conductive yoke. The first central magnetically conductive yoke is disposed on a surface, close to the diaphragm assembly, of the first central magnet. The second central magnetically conductive yoke is disposed on a surface, close to the diaphragm assembly, of the second central magnet. The edge magnetically conductive yoke is disposed on a surface, close to the diaphragm assembly, of the side magnet. The inner magnetically conductive yoke is disposed between the first central magnetically conductive yoke and the second central magnetically conductive yoke. The inner magnetically conductive yoke is magnetically connected to the second magnetically conductive yoke in a gap between the first central magnet and the second central magnet to form the inner magnetically conductive part. This structure is simple and easy to implement.
In a possible implementation of the first aspect, the magnet assembly further includes an intermediate magnetically conductive yoke. The intermediate magnetically conductive yoke is disposed in the gap between the first central magnet and the second central magnet. A surface, close to the diaphragm assembly, of the intermediate magnetically conductive yoke is in magnetic contact with the inner magnetically conductive yoke. A surface, away from the diaphragm assembly, of the intermediate magnetically conductive yoke is in magnetic contact with the second magnetically conductive yoke. The intermediate magnetically conductive yoke forms the inner magnetically conductive part. The inner magnetically conductive yoke is made of a magnetically conductive material such as yoke iron. The yoke iron has good toughness and is easy to process and form. Therefore, the yoke iron can replace the inner magnet for use in a small-sized core.
In a possible implementation of the first aspect, the inner magnetically conductive yoke includes a first protruding part that protrudes in a direction close to the second magnetically conductive yoke. The first protruding part is in magnetic contact with the second magnetically conductive yoke. The first protruding part forms the inner magnetically conductive part. The inner magnetically conductive yoke is made of a magnetically conductive material such as yoke iron. The yoke iron has good toughness and is easy to process and form. Therefore, a protruding part can be formed, to be magnetically connected to the second magnetically conductive yoke. In some embodiments, the first protruding part is molded by stamping. In this way, structure composition complexity of the magnetic circuit system is relatively low, and costs are relatively small.
In a possible implementation of the first aspect, the second magnetically conductive yoke includes a second protruding part that protrudes in a direction close to the inner magnetically conductive yoke. The second protruding part is in magnetic contact with the inner magnetically conductive yoke. The second protruding part forms the inner magnetically conductive part. The second magnetically conductive yoke is made of a magnetically conductive material such as yoke iron. The yoke iron has good toughness and is easy to process and form. Therefore, a protruding part can be formed, to be magnetically connected to the inner magnetically conductive yoke. In some embodiments, the second protruding part is molded by stamping. In this way, structure composition complexity of the magnetic circuit system is relatively low, and costs are relatively small.
In a possible implementation of the first aspect, the inner magnetically conductive yoke includes a first protruding part that protrudes in a direction close to the second magnetically conductive yoke. The second magnetically conductive yoke includes a second protruding part that protrudes in a direction close to the inner magnetically conductive yoke. The first protruding part is in magnetic contact with the second protruding part. The first protruding part and the second protruding part form the inner magnetically conductive part. In this way, a protruding height of the first protruding part and the second protruding part may be reduced. When the first protruding part and the second protruding part are molded by stamping, a yield of molding is relatively high.
In a possible implementation of the first aspect, the first voice coil set includes a first voice coil and a first voice coil former connected between the diaphragm assembly and the first voice coil, and the second voice coil set includes a second voice coil and a second voice coil former connected between the diaphragm assembly and the second voice coil. The first voice coil former and the first voice coil former are respectively configured to adjust a height of the first voice coil and a height of the first voice coil, to adjust the first voice coil and the first voice coil into the magnetic circuit system while ensuring vibration space of the diaphragm assembly. Based on this, a material with a low density and a high structural strength may be selected for the first voice coil former and the second voice coil former, such as aluminum alloy or magnesium-aluminum alloy, to reduce a load of the magnetic circuit system.
In a possible implementation of the first aspect, the first voice coil former includes a first support part and two second support parts. The first support part is disposed between the diaphragm assembly and the first voice coil. The second voice coil former includes a third support part and two fourth support parts. The third support part is disposed between the diaphragm assembly and the second voice coil. The two second support parts are respectively disposed at two corners, away from the third support part, of the first support part. A positive electrode and a negative electrode of the first voice coil are respectively led out from parts, adjacent to the two corners, of the first voice coil. It may also be considered that the two second support parts and the positive electrode and the negative electrode of the first voice coil are respectively located at two corners, away from the second voice coil set, of the first voice coil set. The two fourth support parts are respectively disposed at two corners, away from the first support part, of the third support part. A positive electrode and a negative electrode of the second voice coil are respectively led out from parts, adjacent to the two corners, of the second voice coil. It may also be considered that the two fourth support parts and the positive electrode and the negative electrode of the second voice coil are respectively located at two corners, away from the first voice coil set, of the second voice coil set.
In a possible implementation of the first aspect, the second support part includes a first outward extension unit, a first connection unit, and a second outward extension unit. The first outward extension unit extends from an outer edge of the first support part to a direction away from a central axis of the first support part. The first connection unit extends from an outer end of the first outward extension unit to a side, away from a top surface, of a bottom surface of the first support part. The outer end of the first outward extension unit means an end, away from the central axis of the first support part, of the first outward extension unit. The second outward extension unit extends from one end, away from the first support part, of the first connection unit to a direction away from the central axis of the first support part. In this way, a section of the second support part is of a “right-angled zigzag”-shaped structure. In some other embodiments, the section of the second support part may also be of a “right-angled horizontal U”-shaped structure, an “L”-shaped structure, or an “I”-shaped structure. This structure is simple and easy to implement.
In a possible implementation of the first aspect, the fourth support part includes a third outward extension unit, a second connection unit, and a fourth outward extension unit. The third outward extension unit extends from an outer edge of the third support part to a direction away from a central axis of the third support part. The second connection unit extends from an outer end of the third outward extension unit to a side, away from a top surface, of a bottom surface of the third support part. The outer end of the third outward extension unit means an end, away from the central axis of the third support part, of the third outward extension unit. The fourth outward extension unit extends from one end, away from the third support part, of the second connection unit to a direction away from the central axis of the third support part. In this way, a section of the fourth support part is of a “right-angled zigzag”-shaped structure. In some other embodiments, a section of the fourth support part 2322 may also be of a “right-angled horizontal U”-shaped structure, an “L”-shaped structure, or an “I”-shaped structure. This structure is simple and easy to implement.
In a possible implementation of the first aspect, the core further includes a basket. The first voice coil set and the second voice coil set are located in the basket. The core further includes a second electrical connection structure. The second electrical connection structure includes a first electrical connection unit and a second electrical connection unit. The first electrical connection unit is connected between a positive electrode of the first voice coil set, a negative electrode of the first voice coil set, and the basket. The second electrical connection unit is connected between a positive electrode of the second voice coil, a negative electrode of the second voice coil, and the basket. In this way, electrodes of the first voice coil set and electrodes of the second voice coil set are respectively led out by using the first electrical connection unit and the second electrical connection unit, and a layout is proper.
In a possible implementation of the first aspect, the basket includes a first side and a second side that are opposite to each other. The first voice coil set is located between the first edge and the second voice coil set. The second voice coil set is located between the first voice coil set and the second edge. The first electrical connection unit is connected between the positive electrode of the first voice coil set, the negative electrode of the first voice coil set, and the first side. The second electrical connection unit is connected between the positive electrode of the second voice coil set, the negative electrode of the second voice coil set, and the second side. In this way, a connection path between the first electrical connection unit and the second electrical connection unit is relatively short, and a volume may be manufactured to be relatively small. This helps to reduce costs for the core.
In a possible implementation of the first aspect, the positive electrode and the negative electrode of the first voice coil set are respectively located at two corners, away from the second voice coil set, of the first voice coil set, and the positive electrode and the negative electrode of the second voice coil set are respectively located at two corners, away from the first voice coil set, of the second voice coil set. In this way, the connection path between the first electrical connection unit and the second electrical connection unit is further shortened, and a volume of the second electrical connection structure is reduced.
In a possible implementation of the first aspect, the first electrical connection unit includes two first ends and two second ends. The two first ends of the first electrical connection unit are respectively connected to a positive electrode and negative electrode of the first voice coil set. The two second ends of the first electrical connection unit are fastened to the basket. In the first electrical connection unit, the two first ends of the first electrical connection unit are respectively electrically connected to the two second ends of the first electrical connection unit. The second electrical connection unit includes two first ends. The two first ends of the second electrical connection unit are respectively connected to a positive electrode and negative electrode of the second voice coil set. The two second ends of the second electrical connection unit are fastened to the basket. In the second electrical connection unit, the two first ends of the second electrical connection unit are respectively electrically connected to the two second ends of the second electrical connection unit. In this way, four external terminals of the core are formed.
In a possible implementation of the first aspect, the second electrical connection structure further includes an electrical connection segment. The electrical connection segment electrically connects one second end of the first electrical connection unit to one second end of the second electrical connection unit. In this way, the first voice coil set and second voice coil set are connected in series through the electrical connection segment, to enable the core to be externally connected through two external terminals. This reduces the number of external terminals of the core.
In a possible implementation of the first aspect, the core further includes a basket. The first voice coil set and the second voice coil set are located in the basket. The core further includes a second electrical connection structure. The second electrical connection structure includes a first electrical connection unit and a second electrical connection unit. The first electrical connection unit is connected between one electrode of the first voice coil set, one electrode of the second voice coil set, and the basket. The second electrical connection unit is connected between the other electrode of the first voice coil set, the other electrode of the second voice coil set, and the basket. The electrode of the first voice coil set is one of a positive electrode and a negative electrode, and the other electrode of the first voice coil set is the other of the positive electrode and the negative electrode. The electrode of the second voice coil set is one of a positive electrode and a negative electrode, and the other electrode of the second voice coil set is the other of the positive electrode and the negative electrode.
In a possible implementation of the first aspect, the basket includes a first side and a second side that are opposite to each other. An arrangement direction of the first voice coil set and the second voice coil set is the same as an extension direction of the first side or the second side. Two corners, away from the second voice coil set, of the first voice coil set are respectively a first corner and a second corner. The first corner is located between the first side and the second corner. The second corner is located between the first corner and the second side. The electrode of the first voice coil set is located at the first corner, and the other electrode of the first voice coil set is located at the second corner. Two corners, away from the first voice coil set, of the second voice coil set are respectively a third corner and a fourth corner. The third corner is located between the first side and the fourth corner. The fourth corner is located between the third corner and the second side. The electrode of the second voice coil set is located at the third corner, and the other electrode of the second voice coil set is located at the fourth corner. In this way, a distance between the first corner or the third corner and the first side is relatively short, and a distance between the second corner or the fourth corner and the second short side is relatively short. This shortens a connection path between the first electrical connection unit and the second electrical connection unit and reduces a volume of the second electrical connection structure.
In a possible implementation of the first aspect, the first electrical connection unit includes two first ends and two second ends. The two first ends of the first electrical connection unit are respectively connected to the electrode of the first voice coil set and the electrode of the second voice coil set. The two second ends of the first electrical connection unit are connected to the basket. In the first electrical connection unit, the two first ends of the first electrical connection unit are respectively electrically connected to the two second ends of the first electrical connection unit. The second electrical connection unit includes two first ends. The two first ends of the second electrical connection unit are respectively connected to the other electrode of the first voice coil set and the other electrode of the second voice coil set. In addition, the second electrical connection unit electrically connects the two first ends of the second electrical connection unit. In this way, the first voice coil set and the second voice coil set are connected in series through the second electrical connection unit, and two external terminals of the core may be formed only by using the two second ends of the first electrical connection unit. This enables a quantity of external terminals of the core to be small and facilitates external connection.
In a possible implementation of the first aspect, the basket is rectangularly frame-shaped. The basket includes a first short side and a second short side that are opposite to each other. The first short side forms a first side. The second short side forms a second side. In this way, a volume of the first electrical connection unit and a volume of the second electrical connection unit may be further reduced.
In a possible implementation of the first aspect, the basket further includes a first long side and a second long side that are opposite to each other. The first long side and the second long side respectively form the first side and the second side.
In a possible implementation of the first aspect, the diaphragm assembly includes a dome. The dome is rectangularly plate-shaped. The first voice coil set and the second voice coil set are fastened to the dome, and the first voice coil set and the second voice coil set are arranged in a length direction of the dome. This structure is simple, and layout space of an inner magnetically conductive part is large. The inner magnetically conductive part may be formed by using an inner magnet, to increase a magnetic field strength of the magnetic circuit system.
In a possible implementation of the first aspect, the diaphragm assembly includes a dome. The dome is rectangularly plate-shaped. The first voice coil set and the second voice coil set are fastened to the dome, and the first voice coil set and the second voice coil set are arranged in a width direction of the dome. In this way, a sectional width of the dome in a symmetrical plane between the first voice coil set and the second voice coil set is relatively large, and a strength is relatively high. When the first voice coil set and the second voice coil set are in a process of driving the diaphragm assembly, the dome is hardly broken when the first voice coil set and the second voice coil set cannot move synchronously due to an error.
In a possible implementation of the first aspect, each of the first electrical connection unit and the second electrical connection unit includes a body, a first branch, and a second branch. The body includes a central part and two second ends located on two opposite sides of the central part. The first branch includes a head end, one first end, and a connection segment connected between the head end and the first end. The second branch includes a head end, the other first end, and a connection segment connected between the head end and the other first end. Both the head end of the first branch and the head end of the second branch are connected to the central part of the body. For example, both the head end of the first branch is connected to the head end of the second branch, and the head end of the first branch and the head end of the second branch are spliced, and then connected to the central part of the body. In some other embodiments, the head end of the first branch and the head end of the second branch are respectively connected to different positions at the central part of the body, and a gap is formed between the head end of the first branch and the head end of the second branch. The two first ends are spaced apart, and are spaced apart from the body. The two first ends are movable ends, and may move relative to the body. When a force is applied to the two first ends, to enable the two first ends to move relative to the body, the connection segment of the first branch may be driven to move relative to the body and the connection segment of the second branch. This may prevent the first electrical connection unit from hindering movement of the first voice coil set.
In a possible implementation of the first aspect, the core further includes four auxiliary diaphragms. Each auxiliary diaphragm includes a first fastening part, a bent annular part, and a second fastening part that are sequentially connected. The first fastening part is located on an inner side of the bent annular part. The second fastening part is located on an outer side of the bent annular part. A sectional shape of the bent annular part is arc-shaped or approximately arc-shaped, and an extension track of the bent annular part is arc-shaped. The bent annular part is concave. When an external force is applied to the bent annular part, deformation can occur. This enables the first fastening part and the second fastening part to vibrate relative to each other. First fastening parts of the two auxiliary diaphragms are fastened to ends, away from the diaphragm assembly, of the first voice coil set, and first fastening parts of the other two auxiliary diaphragms are fastened to ends, away from the diaphragm assembly, of the second voice coil set. The second fastening parts of the four auxiliary diaphragms are all fastened to the basket. In this way, ends, away from the diaphragm assembly, of the voice coil sets (including the first voice coil set and the second voice coil set) are supported on the basket by using the four auxiliary diaphragms. This can enable the voice coil sets to be back in position, prevent the voice coil sets from vibrating during operation, and prevent generation of rolling vibration.
In a possible implementation of the first aspect, both the bent annular part of the auxiliary diaphragm and a bent annular part of a diaphragm in the diaphragm assembly are concave. In this way, during vibration of the voice coil set, a deformation direction of the bent annular part of the diaphragm in the diaphragm assembly is the same as a deformation direction of the bent annular part of the auxiliary diaphragm. This may better suppress swinging of the voice coil set. In some other parallel embodiments that produce same effect, both the bent annular part of the diaphragm in the diaphragm assembly and the bent annular part of the auxiliary diaphragm are convex.
In a possible implementation of the first aspect, central axes of the bent annular parts of the four auxiliary diaphragms are respectively collinear with central axes of four rounded corners of the bent annular parts in the diaphragm. In this way, a resistance force of the diaphragm and the auxiliary diaphragm to the voice coil set may be reduced, to ensure smooth vibration of the voice coil set.
In a possible implementation of the first aspect, radii of the bent annular parts of the four auxiliary diaphragms may be respectively equal to or different from radii of the four rounded corners of the bent annular parts in the diaphragm.
According to a second aspect, some embodiments of this application provide a speaker module. The speaker module includes a housing and the core described in any one of the foregoing technical solutions. The core is disposed in the housing, and the housing is separated by a diaphragm assembly of the core into a front cavity and a rear cavity. A first voice coil set, a second voice coil set, and a magnetic circuit system of the core are located in the rear cavity. A sound output channel is disposed at the housing, and the front cavity is connected to the sound output channel.
Because the speaker module provided in the embodiments of this application includes the core described in any one of the foregoing technical solutions, by using the speaker module or the core, a same technical problem can be resolved, and same effect can be achieved.
According to a third aspect, some embodiments of this application provide an electronic device. The electronic device includes an external housing, a main board, and the speaker module described in the foregoing technical solution. The main board and the speaker module are disposed in the external housing, the speaker module is electrically connected to the main board, a sound output hole is provided at the external housing, and a sound output channel is connected to the sound output hole.
Because the electronic device provided in some embodiments of this application includes the speaker module described in the foregoing technical solutions, audio performance of the electronic device can be improved while a thinning design of the electronic device is met.
In embodiments of this application, terms “first”, “second”, “third”, and “fourth” are used merely for the purpose of description, and shall not be construed as indicating or implying relative importance or implying a quantity of indicated technical features. Therefore, a feature limited by “first”, “second”, “third”, and “fourth” may explicitly or implicitly include one or more features.
In the embodiments of this application, the term “include”, “have”, or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, a method, an article, or an apparatus that includes a series of elements includes not only those elements but also other elements that are not explicitly listed, or includes elements inherent to such process, method, article, or apparatus. In absence of more constraints, an element preceded by “includes a . . . ” does not preclude the existence of other identical elements in the process, method, article, or apparatus that includes the element.
In the embodiments of this application, “and/or” indicates merely an association relationship for describing associated objects and represents the presence of three relationships. For example, A and/or B may represent the presence of three cases: only A, both A and B, and only B. In addition, the character “/” in this specification generally indicates an “or” relationship between the associated objects.
This application provides an electronic device. T the electronic device is an electronic device that has a sound play function. Specifically, the electronic device includes but is not limited to a mobile phone, a tablet personal computer (tablet personal computer), a laptop computer (laptop computer), a personal digital assistant (personal digital assistant, PDA), a personal computer, a notebook computer, an in-vehicle device, a wearable device, a personal stereo, a radio, or the like. The wearable device includes but is not limited to a smart band, a smart watch, a smart head-mounted display, smart glasses, or the like.
It may be understood that
In the embodiments shown in
The screen 10 is used to display an image, a video, and the like. The screen 10 includes a transparent cover plate and a display screen (a panel, also referred to as a display panel). The transparent cover plate is laminated with the display screen, and is fastened by adhesive or the like. The transparent cover plate is mainly used to protect the display screen and prevent dust. A material of the transparent cover plate includes but is not limited to glass. The display screen may be a flexible display screen, or may be a rigid display screen. For example, the flexible display screen may be an organic light-emitting diode (organic light-emitting diode, OLED) display screen, an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED) display screen, a mini light-emitting diode (mini organic light-emitting diode) display screen, a micro light-emitting diode (micro organic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a quantum dot light-emitting diode (quantum dot light-emitting diodes, QLED) display screen, a liquid crystal display (liquid crystal display, LCD) screen, or the like.
The back housing 20 forms an external housing of the electronic device 100. The back housing 20 is configured to protect an inner electronic component of the electronic device 100. A material of the back housing 20 includes but is not limited to metal, ceramic, plastic, and glass. To implement lightness and thinning of the electronic device 100 and ensure structural strength of the back housing 20, a material of the back housing 20 may be metal. The back housing 20 includes a back cover 201 and a frame 202. The back cover 201 is located on a side, away from the transparent cover plate, of the display screen and is laminated with the transparent cover plate and the display screen. The frame 202 is located between the back cover 201 and the transparent cover plate, and the frame 202 is fastened to the back cover 201. For example, the frame 202 may be fastened to the back cover 201 by adhesive. The frame 202 and the back cover 201 may also be integrated to form a structure. In other words, the frame 202 and the back cover 201 are an integral structure. The transparent cover plate is fastened to the frame 202. In some embodiments, the transparent cover plate may be fastened to the frame 202 by adhesive. The transparent cover plate, the back cover 201, and the frame 202 enclose inner accommodating space of the electronic device 100. The inner accommodating space accommodates the display screen, the main control board 30, the interface main board 40, the battery 50, and the speaker module 60.
In an inner accommodating cavity of the electronic device 100, the main control board 30, the interface main board 40, the battery 50, and the speaker module 60 may be fastened to an inner surface of the back cover 201, or may be fastened to a surface, close to the back cover 201, of the screen 10.
The main control board 30 is configured to integrate a main control chip. The main control chip may be, for example, an application processor (application processor, AP), a double data rate (double data rate, DDR), a universal flash storage (universal flash storage, UFS), and the like. In some embodiments, the main control board 30 is electrically connected to the screen 10, and the main control board 30 is configured to control the screen 10 to display an image or a video.
The main control board 30 may be a rigid circuit board, a flexible circuit board, or a rigid-flexible combined circuit board. The main control board 30 may be an FR-4 dielectric board, a Rogers (Rogers) dielectric board, an FR-4-Rogers mixed dielectric board, or the like. Herein, FR-4 is a grade designation for a flame-retardant material, and the Rogers dielectric plate is a high frequency plate.
The interface main board 40 is integrated with a universal serial bus (universal serial bus, USB) component. The USB component may be a USB Type-C interface component, a USB Type-A interface component, a USB Type Micro-B interface component, or a USB Type-B interface component. A socket 70 is disposed at a position, corresponding to the USB component, on the frame 202, and accessories such as a charger, earphones, and a data cable may be electrically connected to the USB component by using the socket 70, to implement power supply transmission, signal transmission, and data transmission.
The interface main board 40 may be a rigid circuit board, a flexible circuit board, or a rigid-flexible combined circuit board. The interface main board 40 may be an FR-4 dielectric board, a Rogers (Rogers) dielectric board, an FR-4-Rogers mixed dielectric board, or the like.
In addition to the main control board 30 and the interface main board 40, the electronic device 100 may further include an antenna main board (not shown in the figure). The antenna main board is integrated with components such as an antenna and a transceiver. The antenna is configured to transmit and receive an electromagnetic wave signal. The antenna includes but is not limited to a wireless local area network (wireless local area networks, WLAN) (such as a wireless fidelity (wireless fidelity, Wi-Fi) network) antenna, a Bluetooth (Bluetooth, BT) antenna, a global navigation satellite system (global navigation satellite system, GNSS) antenna, or a near field communication (near field communication, NFC) antenna. The transceiver is configured to transmit and receive an antenna signal. In some other embodiments, the antenna may be independent of the antenna main board. For example, when the frame 202 or the back cover 201 of the tablet computer is a conductive structure, the antenna may further be formed of a part of a frame or a part of the back cover. In this way, the antenna is formed on the frame 202 or the back cover 201.
The main control board 30 is electrically connected to the interface main board 40, and the main control board 30 is electrically connected to the antenna main board, to implement signal transmission and data transmission between the main control board 30 and the interface main board 40 and between the main control board 30 and the antenna main board. In some embodiments, the main control board 30 is electrically connected to the interface main board 40 by using a flexible printed circuit board (flexible printed circuit board, FPC), and the main control board 30 is electrically connected to the antenna main board by using a flexible printed circuit board. In addition, a conducting wire or a varnished wire may alternatively be used for electric connection between the main control board 30 and the interface main board 40 and between the main control board 30 and the antenna main board. In some other embodiments, the three main boards may be integrated into one. In other words, the three main boards are a same main board.
The battery 50 is located in a middle region of inner accommodating space of the electronic device 100. The battery 50 is configured to supply power to electronic components such as the display screen, the main control board 30, the interface main board 40, and the antenna main board in the electronic device 100.
The speaker module 60 is electrically connected to at least one of the main control board 30, the interface main board 40, and the antenna main board, to obtain an audio electrical signal such as music or a voice. The speaker module 60 is configured to restore the audio electrical signal to a voice, and can support a function of playing sound on speaker. There may be one or more speaker modules 60. As there are more speaker modules 60, better performance of sound playing on speaker and better sound effect are achieved. In the embodiment shown in
In this embodiment, the speaker module 60 may be used as a low-frequency speaker, an intermediate-frequency speaker, or a high-frequency speaker, or may be alternatively used as the low-frequency speaker, the intermediate-frequency speaker, and the high-frequency speaker simultaneously.
Refer to
It should be noted that
A fastening part is disposed on the housing 601. The fastening part includes but is not limited to a through hole, a threaded hole, a buckle, a slot, a limiting step, and the like. In the embodiment shown in
A material of the housing 601 includes but is not limited to metal and plastic. In some embodiments, the material of the housing 601 is plastic. The plastic has low costs and is easy to mold, helping to reduce processing costs for the speaker module 60.
The housing 601 may be an integrated structure, or may be formed by assembling a plurality of parts. In some embodiments, the housing 601 includes a front housing 6011 and a rear housing 6012. The housing 601 is formed by assembling the front housing 6011 and the rear housing 6012, helping to reduce a forming difficulty and an assembling difficulty of the housing 601.
Specifically, refer to
In some other embodiments, the front cavity and the sound output channel of the speaker module 60 may alternatively be formed on an inner side of the front cover plate 6011a. “The inner side of the front cover plate 6011a” means a side, away from the outer surface M1, of the inner surface M2 of the front cover plate 6011a. In this embodiment, the first opening C1 does not need to be disposed on the front cover plate 6011a, and the sealing structure 602 does not need to be disposed on the outer surface M1 of the front cover plate 6011a. This may reduce structural complexity of the speaker module 60.
Still refer to
The core 603 is disposed in the front housing 6011.
Specifically, refer to
Refer to
Based on this, optionally, refer to
The core 603 is a core electronic component of the speaker module 60. To introduce an audio electrical signal into the core 603 by using the main board (specifically, the main control board 30, the interface main board 40, or the antenna main board) of the electronic device 100 shown in
A first terminal b1 and a second terminal b2 are disposed on the terminal support part 6013. One of the first terminal b1 and the second terminal b2 is a positive terminal, and the other is a negative terminal. The speaker module 60 is configured to be electrically connected to the main board of the electronic device 100 shown in
Based on this, further, the first electrical connection structure 604 includes a first end n1, a second end n2, and a third end n3. The first end n1 of the first electrical connection structure 604 is located outside the front housing 6011, and is electrically connected to the first terminal b1 and the second terminal b2 on the terminal support part 6013. The second end n2 and the third end n3 of the first electrical connection structure 604 extend inside the front housing 6011, passing through the front housing 6011. In some embodiments, a second opening h1 is disposed on the side frame 6011b of the front housing 6011, and the second end n2 and the third end n3 of the first electrical connection structure 604 extend into the front housing 6011 through the second opening h1, and are respectively electrically connected to a positive electrode and negative electrode of the core 603. The first electrical connection structure 604 is configured to transmit an audio electrical signal from the first terminal b1 to the second terminal n2 for output, and transmit an audio electrical signal from the second terminal b2 to the third terminal n3 for output. Therefore, the audio electrical signal is further introduced into the core 603 from a position of the housing 601 by using the first electrical connection structure 604.
The first electrical connection structure 604 includes but is not limited to a flexible circuit board (flexible printed circuit, FPC), a conducting wire, a varnished wire, and a structure formed by connecting a plurality of conducting wires through a flexible structure. In the embodiment shown in
Refer to
Refer to
The rear housing 6012 and the front housing 6011 enclose a rear cavity C2 of the speaker module 60. The core 603 is disposed in the rear cavity C2, and the rear cavity C2 is separated from a front cavity.
To reduce a height of the speaker module 60 in the Z-axis direction, in some embodiments, refer to
Based on the foregoing embodiment, a part, located in the third opening 606, of the core 603 is further configured to block the third opening 606, to enable the rear cavity C2 to become a closed cavity. Based on this, to ensure blocking effect of the core 603 on the third opening 606, in one aspect, a part, located in the third opening 606, of the core 603 is a closed structure. To be specific, a ventilation structure such as a through hole or a through groove that connects an inside and an outside of the rear cavity C2 does not exist in the part. In another aspect, an inner edge of the third opening 606 is connected to the core 603 in a sealing manner, to block a gap between the inner edge of the third opening 606 and the core 603.
To implement a sealed connection between the inner edge of the third opening 606 and the core 603, in some embodiments, refer to
In some other embodiments, an end, away from the front cover plate 6011a, of the core 603 may alternatively be located on an inner side of the rear housing 6012. “The inner side of the rear housing 6012” means a side, away from the outer surface M4, of the inner surface M3 of the rear housing 6012. In this way, the core 603 is entirely located in the rear cavity C2, and a third opening 606 does not need to be formed at the rear housing 6012, and a sealing structure does not need to be disposed. This may reduce structural complexity of the speaker module 60.
To improve low-frequency performance of the speaker module 60, in some embodiments, refer to
The sealing cover 605 is disposed at the filling opening 607. Specifically, the sealing cover 605 may be disposed at the filling opening 607 in a manner of thread connection, clamping, soldering, or the like.
Based on descriptions of various structures in the foregoing speaker module 60, when the core 603 is powered on and is operating, air in the front cavity may be pushed to vibrate, to form a sound, converting an audio electrical signal into a sound signal. The core 603 is a core component that generates sound in the speaker module 60. A thickness and audio performance of the core directly affect a thickness and audio performance of the speaker module. Therefore, a structure of the core 603 is mainly described as follows.
Specifically, refer to
It should be noted that
It may be understood that “top” used for components in the core 603 in the following description means a part, close to the front cavity, of a described component when the core 603 is used in the speaker module 60, “bottom” means a part, away from the front cavity, of a described component when the core 603 is used in the speaker module 60, “inside” means a part, close to a central axis of the core 603, of a described component, and “outside” means a part, away from the central axis of the core 603, of a described component. “Top”, “bottom”, “inside”, or “outside” does not indicate or imply that a specified apparatus or component is to have a specific orientation or is constructed or operated in a specific orientation. Therefore, this is not understood as a limitation to this application. In addition, in the following description, “rectangular” or “square” used for describing a shape of each component in the core 603 indicates an approximate shape, an angle may be disposed between adjacent sides, or an angle is not disposed. In addition, in the following description, azimuth definitions such as “parallel”, “vertical”, “consistent in direction”, “same in direction”, or “opposite in direction” that are used for components in the core 603 all indicate approximate azimuths with an error allowed.
The basket 1 is used as a “support skeleton” of the core 603, to support the vibrating system 2 and fasten the magnetic circuit system 3. A material of the basket 1 includes but is not limited to metal and plastic.
The basket 1 may be an integral structural member, or may be formed by assembling a plurality of parts in a manner of bonding, clamping, thread connection, or the like.
It may be understood that the basket 1 is configured to support the vibrating system 2 and fasten the magnetic circuit system 3. When this requirement is met, the basket 1 may also be designed in another shape, and is not limited to a shape in this embodiment.
Refer to
The diaphragm assembly 21 is a body that pushes air in the front cavity of the speaker module 60 to move. When the core 603 shown in
Refer to
The dome 211 is rectangularly plate-shaped. A length direction of the dome 211 is parallel to an X-axis, a width direction of the dome 211 is parallel to a Y-axis, and a thickness direction of the dome 211 is parallel to a Z-axis. The dome 211 includes a top surface 211a and a bottom surface 211b that are disposed opposite to each other. A limiting groove 211c is disposed in an edge region of the bottom surface 211b of the dome 211.
The diaphragm 212 is rectangularly annular. An extension direction of a long side of the diaphragm 212 is parallel to the X-axis, and an extension direction of a short side of the diaphragm 212 is parallel to the Y-axis. The diaphragm 212 includes a first fastening part 212a, a suspension ring 212b, and a second fastening part 212c that are sequentially connected. The first fastening part 212a is located on an inner of the bent annular part 212b, and the second fastening part 212c is located on an outer side of the bent annular part 212b.
The first fastening part 212a is partially accommodated in the limiting groove 211c of the dome 211, and is fastened to the dome 211. Based on this, the first fastening part 212a of the diaphragm 21 includes a top surface 212al and a bottom surface 212a2. The top surface 212al of the first fastening part 212a contacts a bottom wall of the limiting groove 211c. The bottom surface 212a2 of the first fastening part 212a is flush with a bottom surface 211b of the dome 211. A surface formed by splicing the bottom surface 212a2 of the first fastening part 212a and the bottom surface 211b of the dome 211 is used to fasten the first voice coil set 22 and the second voice coil set 23, to help to fasten the first voice coil set 22 and the second voice coil set 23.
The second fastening part 212c includes a top surface 212cl and a bottom surface 212c2 that are opposite to each other. The top surface 212cl of the second fastening part 212c forms the fastening surface M5 of the core 603 shown in
A sectional shape of the bent annular part 212b of the diaphragm 212 is arc-shaped or approximately arc-shaped, and an extension track of the bent annular part 212b is rounded rectangular. A long side extension direction of the extension track of the bent annular part 212b is parallel to the X-axis, and a short side extension direction of the extension track of the bent annular part 212b is parallel to the Y-axis. The bent annular part 212b of the diaphragm 212 is concave. To be specific, the bent annular part 212b is concave toward a side, away from the top surface 212al of the first fastening part 212a, of the bottom surface 212a2 of the first fastening part 212a. When an external force is applied to the bent annular part 212b of the diaphragm 212, deformation can occur. This enables the dome 211 to vibrate up and down relative to the second fastening part 212c in the Z-axis direction.
In this embodiment of this application, because the bent annular part 212b of the diaphragm 212 is disposed to be concave, space of an upper part of the core 603 can be reduced. This can reduce space of the front cavity.
Refer to
Refer to
Refer to
Refer to
The first voice coil 221 includes a top surface 221a and a bottom surface 221b that are opposite to each other. The second voice coil 231 includes a top surface 231a and a bottom surface 231b that are opposite to each other. An end at which the top surface 221a of the first voice coil 221 is located and an end at which the top surface 231a of the second voice coil 231 is located are configured to be fastened to a dome 211 of the diaphragm assembly 21. An end at which the bottom surface 221b of the first voice coil 221 is located and an end at which the bottom surface 231b of the second voice coil 231 is located are configured to extend into the magnetic circuit system 3, to match the magnetic circuit system 3.
The first voice coil former 222 and the second voice coil former 232 are respectively configured to adjust a height of the first voice coil 221 and a height of the first voice coil 221 in a Z-axis direction, to adjust the first voice coil 221 and the first voice coil 221 into the magnetic circuit system 3 while ensuring vibration space of the diaphragm assembly 21. Based on this, a material with a low density and a high structural strength may be selected for the first voice coil former 222 and the second voice coil former 232, such as aluminum alloy or magnesium aluminum alloy, to reduce a load of the magnetic circuit system 3.
In some embodiments, the first voice coil former 222 includes a first support part 2221 and two second support parts 2222. The first support part 2221 includes a top surface 2221a and a bottom surface 2221b that are opposite to each other. The bottom surface 2221b of the first support part 2221 is fastened to the top surface 221a of the first voice coil 221. The top surface 2221a of the first support part 2221 is used to be fastened to the dome 211.
The second voice coil former 232 includes a third support part 2321 and two fourth support parts 2322. The third support part 2321 includes a top surface 2321a and a bottom surface 2321b that are opposite to each other. The bottom surface 2321b of the third support part 2321 is fastened to the top surface 231a of the second voice coil 231. The top surface 2321a of the third support part 2321 is fastened to the dome 211.
The two second support parts 2222 are respectively disposed at two corners, away from the third support part 2321, of the first support part 2221. A positive electrode and a negative electrode (not shown in the figure) of the first voice coil 221 are respectively led out from parts, adjacent to the two corners, of the first voice coil 221. It may also be considered that the two second support parts 2222 and the positive electrode and the negative electrode of the first voice coil 221 are respectively located at two corners, away from the second voice coil set 23, of the first voice coil set 22.
The two fourth support parts 2322 are respectively disposed at two corners, away from the first support part 2221, of the third support part 2321. A positive electrode and a negative electrode (not shown in the figure) of the second voice coil 231 are respectively led out from parts, adjacent to the two corners, of the second voice coil 231. It may also be considered that the two fourth support parts 2322 and the positive electrode and the negative electrode of the second voice coil 231 are respectively located at two corners, away from the first voice coil set 22, of the second voice coil set 23.
The two second support parts 2222 and the two fourth support parts 2322 are all configured to fasten and support ends of the second electrical connection structure 24 in
Specifically, refer to
Similarly, still refer to
The first voice coil former 222 may be an integrated structure, or may be formed by assembling a plurality of parts. This is not specifically limited in this application. Similarly, the second voice coil former 232 may be an integrated structure, or may be formed by assembling a plurality of parts. This is not specifically limited in this application.
In some other embodiments, the first voice coil former 222 and the second voice coil former 232 may not be disposed in the core 603, and the first voice coil 221 and the second voice coil 231 may be directly fastened to the diaphragm assembly 21.
Refer to
Based on this,
Specifically, still refer to
The two first ends D1 of the first electrical connection unit 241 are respectively connected to the two corners of the first voice coil set 22 in a same manner. A connection structure at an upper left corner of the first voice coil set 22 in
Similarly, refer to
In this way, the connection path between the first electrical connection unit 241 and the second electrical connection unit 242 is further shortened, and a volume of the second electrical connection structure 24 is reduced.
Based on the foregoing embodiment, still refer to
In this way, an electrical input end of the first voice coil 221 is led out to two ends of the first short side 1a, and two second ends D2 of the first electrical connection unit 241 form two external terminals of the core 603. The two external terminals are configured to be respectively electrically connected to the second end n2 and the third end n3 of the first electrical connection structure 604 in
Similarly, the second electrical connection unit 242 further includes two second ends D2. The two second ends D2 of the second electrical connection unit 242 are respectively disposed at two ends of the second short side 1b of the basket 1. Specifically, the two second ends D2 of the second electrical connection unit 242 are respectively disposed at two ends of a region on the second short side 1b of the bottom surface m2 of the basket 1. In the second electrical connection unit 242, the two first ends D1 of the second electrical connection unit 242 are respectively electrically connected to the two second ends D2 of the second electrical connection unit 242.
In this way, an electrical input end of the second voice coil 231 is led out to two ends of the second short side 1b, and two second ends D2 of the second electrical connection unit 242 form two other external terminals of the core 603. The two external terminals are configured to be respectively electrically connected to the second end n2 and the third end n3 of the first electrical connection structure 604 in
In some other embodiments, the two second ends D2 of the first electrical connection unit 241 may alternatively be disposed at two ends of a first long side 1c, and the two second ends D2 of the second electrical connection unit 242 may alternatively be disposed on two ends of a second long side 1d. This is not specifically limited herein.
In the foregoing embodiment, because the two second ends D2 of the first electrical connection unit 241 are respectively disposed at the two ends of the first short side 1a, the two second ends D2 of the second electrical connection unit 242 are respectively disposed at the two ends of the second short side 1b, and the basket 1 is enclosed and formed by sequentially connecting the first short side 1a, the first long side 1c, the second short side 1b, and the second long side 1d, from another perspective, one second end D2 of the first electrical connection unit 241 and one second end D2 of the second electrical connection unit 242 are respectively located at the two ends of the first long side 1c of the basket 1, and the other second end D2 of the first electrical connection unit 241 and the other second end D2 of the second electrical connection unit 242 are respectively located at the two ends of the second long side Id of the basket 1.
Based on this, to reduce a quantity of external terminals of the core 603 for being electrically connected to the first electrical connection structure 604 in
In some other embodiments, the electrical connection segment 243 is fastened to the second long side 1d and electrically connects the two second ends D2 located at the two ends of the second long side 1d. In this way, the first voice coil set 22 and the second voice coil set 23 are connected in series through the electrical connection segment 243, and two second ends D2 located at two ends of the first long side 1c form two external terminals of the core 603. This reduces a quantity of external terminals of the core 603, to help to be electrically connected to the first electrical connection structure 604 in
With reference to the first electrical connection unit 241 described in any one of the foregoing embodiments, to prevent the first electrical connection unit 241 from hindering movement of the first voice coil set, in some embodiments, refer to
Both the head end 2412a of the first branch 2412 and the head end 2413a of the second branch 2413 are connected to the central part 2411a of the body 2411. For example, the head end 2412a of the first branch 2412 is connected to the head end 2413a of the second branch 2413, and the head end 2412a and the head end 2413a are spliced, and then connected to the central part 2411a of the body 2411. In some other embodiments, the head end 2412a of the first branch 2412 and the head end 2413a of the second branch 2413 are respectively connected to different positions at the central part 2411a of the body 2411, and a gap is formed between the head end 2412a and the head end 2413a.
The two first ends D1 are spaced apart, and are spaced apart from the body 2411. The two first ends D1 are movable ends, and may move relative to the body 2411. When a force is applied to the two first ends D1, to enable two first ends D1 to move relative to the body 2411, the connection segment 2412b of the first branch 2412 may be driven to move relative to the body 2411 and the connection segment 2413b of the second branch 2413. This may prevent the first electrical connection unit 241 from hindering movement of the first voice coil set 22.
The second electrical connection unit 242 is also a flexible electrical connection structure. Specifically, a structure of the second electrical connection unit 242 may be the same as and symmetric to the structure of the first electrical connection unit 241, to prevent the second electrical connection unit 242 from hindering movement of the second voice coil set 23. The structure of the second electrical connection unit 242 is not described in this application.
In some other embodiments,
A difference between the foregoing embodiment and the embodiment shown in
In this way, a distance between the first corner B1 or the third corner B3, and the first short side 1a is relatively short, and a distance between the second corner B2 or the fourth corner B4, and the second short side 1b is relatively short, to help to dispose the second electrical connection structure 24.
Based on this, the core 603 further includes a second electrical connection structure 24. The second electrical connection structure 24 has a same shape as the second electrical connection structure 24 shown in
Specifically, still refer to
Specifically, a connection structure of each corner may be the same as a connection structure of the corner shown in
Similarly, the second electrical connection unit 242 includes two first ends D1. The two first ends D1 of the second electrical connection unit 242 are respectively connected to the second corner B2 of the first voice coil set 22 and the fourth corner B4 of the second voice coil set 23. Specifically, the first end D1 at the second corner B2 is fastened to the second outward extension unit 2222c at the second corner B2, and is electrically connected to the negative electrode or positive electrode of the first voice coil 221 at the second corner B2. The first end D1 at the fourth corner B4 is fastened to the fourth outward extension unit 2322c at the fourth corner B4, and is electrically connected to the negative electrode or positive electrode of the second voice coil 231 at the fourth corner B4.
In this way, the connection path between the first electrical connection unit 241 and the second electrical connection unit 242 is further shortened, and a volume of the second electrical connection structure 24 is reduced.
Based on the foregoing embodiment, still refer to
In this way, an electrical input end of the first voice coil 221 is led out to two ends of the first short side 1a, and two second ends D2 of the first electrical connection unit 241 form two external terminals of the core 603. The two external terminals are configured to be respectively electrically connected to the second end n2 and the third end n3 of the first electrical connection structure 604 in
Based on the foregoing embodiment, optionally, the second electrical connection unit 242 electrically connects the two first ends D1 of the second electrical connection unit 242. For example, an electrical connection path between the two first ends D1 of the second electrical connection unit 242 may be L3. In this way, the first voice coil set 22 and the second voice coil set 23 are connected in series through the second electrical connection unit 242. Two external terminals of the core 603 may be formed by using only the two second ends D2 of the first electrical connection unit 241. This reduces a quantity of external terminals of the core 603, to help to be electrically connected to the first electrical connection structure 604 in
It should be noted that, in addition to the X-axis direction or the Y-axis direction, an arrangement direction of the first voice coil set 22 and the second voice coil set 23 may be another direction in an XY plane. This is not specifically limited in this application.
Specifically, the four auxiliary diaphragms 25 have a same structure. The auxiliary diaphragm 25 is approximately sector-shaped. The auxiliary diaphragm 25 includes a first fastening part 251, a bent annular part 252, and a second fastening part 253 that are connected sequentially. The first fastening part 251 is located on an inner side of the bent annular part 252. The first fastening part 251 includes a top surface 251a and a bottom surface 251b. The second fastening part 253 is located on an outer side of the bent annular part 252. The second fastening part 253 includes a top surface 253a and a bottom surface 253b. A sectional shape of the bent annular part 252 of the auxiliary diaphragm 25 is arc-shaped or approximately arc-shaped, and an extension track of the bent annular part 252 is arc-shaped. The bent annular part 252 of the auxiliary diaphragm 25 is concave. To be specific, the bent annular part 252 is concave toward a side, away from the top surface 251a of the first fastening part 251, of the bottom surface 251b of the first fastening part 251. When an external force is applied to the bent annular part 252 of the auxiliary diaphragm 25, the first fastening part 251 and the second fastening part 253 vibrate relative to each other in a Z-axis direction. A notch 254 is formed on a side, away from the first fastening part 251, of the second fastening part 253 of the auxiliary diaphragm 25. The notch 254 is configured to expose the second end D2 of the second electrical connection structure 24 in
The four auxiliary diaphragms 25 are connected to the voice coil set in a same manner, and the four auxiliary diaphragms 25 are connected to the basket 1 in a same manner. The following uses an example in which one of the auxiliary diaphragms 25 is connected to the voice coil set and the basket 1 for description.
Specifically, refer to
Based on the foregoing embodiment, still refer to
In some embodiments, central axes of the bent annular parts 252 of the four auxiliary diaphragms 25 are respectively collinear with central axes of four rounded corners of the bent annular parts 212b in the diaphragm 212. In this way, a resistance force of the diaphragm 212 and the auxiliary diaphragm 25 to the voice coil set may be reduced, to ensure smooth vibration of the voice coil set.
Based on this, radii of the bent annular parts 252 of the four auxiliary diaphragms 25 may be respectively equal to or different from radii of the four rounded corners of the bent annular parts 212b in the diaphragm 212. This is not specifically limited herein.
Refer to
The magnet assembly 31 includes a first central magnet 311, a second central magnet 312, a side magnet 313, and an inner magnet 314. The first central magnet 311 is spaced apart from the second central magnet 312. The side magnet 313 is circumferentially disposed around a central magnet set including the first central magnet 311 and the second central magnet 312. The inner magnet 314 is disposed in a gap between the first central magnet 311 and the second central magnet 312. In addition, the inner magnet 314 and the first central magnet 311 are spaced apart, and the inner magnet 314 and the second central magnet 312 are spaced apart.
The magnet assembly 31 includes a top surface and a bottom face that are opposite to each other. Specifically, the first central magnet 311 includes a top surface 311a and a bottom surface 311b that are opposite to each other. The second central magnet 312 includes a top surface 312a and a bottom surface 312b that are away from each other. The side magnet 313 includes a top surface and a bottom face that are opposite to each other. The inner magnet 314 includes a top surface 314a and a bottom surface 314b that are opposite to each other. The top surface 311a of the first central magnet 311, the top surface 312a of the second central magnet 312, the top surface of the side magnet 313, and the top surface 314a of the inner magnet 314 form a top surface of the magnet assembly 31. The bottom surface 311b of the first central magnet 311, the bottom surface 312b of the second central magnet 312, the bottom surface of the side magnet 313, and the bottom surface 314b of the inner magnet 314 form a bottom surface of the magnet assembly 31.
In some embodiments, the side magnet 313 includes a first side magnet 3131, a second side magnet 3132, a third side magnet 3133, and a fourth side magnet 3134. The first side magnet 3131 and the second side magnet 3132 are respectively disposed on two opposite sides of the central magnet set (including the first central magnet 311 and the second central magnet 312). An arrangement direction of the first side magnet 3131 and the second side magnet 3132 is the same as an arrangement direction of the first central magnet 311 and the second central magnet 312 in the central magnet set. The third side magnet 3133 and the fourth side magnet 3134 are respectively disposed on two other opposite sides of the central magnet set. In addition, an arrangement direction of the third side magnet 3133 and the fourth side magnet 3134 is perpendicular to an arrangement direction of the first central magnet 311 and the second central magnet 312 in the central magnet set.
The inner magnet 314 is located between the third side magnet 3133 and the fourth side magnet 3134, and the inner magnet 314 includes a first inner magnet segment 3141 and a second inner magnet segment 3142. The first inner magnet segment 3141 is disposed close to the third side magnet 3133 and integrally formed with the third side magnet 3133. The second inner magnet segment 3142 is disposed close to the fourth side magnet 3134 and integrally formed with the fourth side magnet 3134. In this way, two T-shaped magnets are formed. In some other embodiments, the inner magnet 314 may be separated or spaced apart from the third side magnet 3133 and the fourth side magnet 3134, or integrally formed with the third side magnet 3133 and the fourth side magnet 3134 to form an H-shaped magnet, or integrally formed with one of the third side magnet 3133 and the fourth side magnet 3134 to form one T-shaped magnet and one strip-shaped magnet. This is not specifically limited herein.
The first side magnet 3131, the second side magnet 3132, the third side magnet 3133, and the fourth side magnet 3134 respectively have a top surface 3131a, a top surface 3132a, a top surface 3133a, and a top surface 3134a. The four top surfaces form the top surface of the side magnet 313. The first side magnet 3131, the second side magnet 3132, the third side magnet 3133, and the fourth side magnet 3134 further respectively have a bottom surface 3131b, a bottom surface 3132b, a bottom surface 3133b, and a bottom surface 3134b. The four bottom surfaces form the bottom surface of the side magnet 313.
In some other embodiments, the side magnet 313 may alternatively include more than four magnets, and may alternatively include an annular magnet circumferentially disposed around the central magnet set. This is not specifically limited herein.
The top surface 3131a of the first side magnet 3131 includes a first accommodating groove 3131c. The top surface 3131a of the first side magnet 3131 is separated by the first accommodating groove 3131c into an inner side region and an outer side region. The inner side region is located on an inner side of the first accommodating groove 3131c. The outer side region is located on an outer side of the first accommodating groove 3131c.
The top surface 3132a of the second side magnet 3132 includes a second accommodating groove 3132c. The top surface 3132a of the second side magnet 3132 is separated by the second accommodating groove 3132c into an inner side region and an outer side region. The inner side region is located on an inner side of the first accommodating groove 3131c. The outer side region is located on an outer side of the first accommodating groove 3131c.
Refer to
The top surface 3131a of the first side magnet 3131 is fastened to a surface, away from the basket 1, of the first electrical connection unit 241 in the second electrical connection structure 24. Specifically, the first side magnet 3131 is fastened, by using an outer side region of the top surface 3131a, to a surface, away from the basket 1, of a body 2411 in the first electrical connection unit 214. A first branch 2412 and a second branch 2413 of the first electrical connection unit 241 are partially located at openings of the first accommodating groove 3131c.
Similarly, the top surface 3132a of the second side magnet 3132 is fastened to a surface, away from the basket 1, of the second electrical connection unit 242 in the second electrical connection structure 24. Specifically, the second side magnet 3132 is fastened, by using an outer side region of the top surface 3132a, to a surface, away from the basket 1, of a body in the second electrical connection unit 242. A first branch and a second branch of the second electrical connection unit 242 are partially located at openings of the second accommodating groove 3132c.
In this way, the first side magnet 3131 and the second side magnet 3132 are indirectly fastened to the basket 1 by using the second electrical connection structure 24, and the first accommodating groove 3131c and the second accommodating groove 3132c allow the second electrical connection structure 24 to move in a direction close to the magnet assembly 31.
The four auxiliary diaphragms 25 are respectively located in a gap between two adjacent side magnets.
Based on this, if the second electrical connection structure 24 further includes the electrical connection segment 243 (refer to
Refer to
The second magnetically conductive yoke 33 is rectangularly plate-shaped. Avoidance grooves 33c are disposed in four corner regions of edges of the top surface 33a of the second magnetically conductive yoke 33. Notches 33d are disposed in four corners of edges of the second magnetically conductive yoke 33. The bottom surface 33b of the second magnetically conductive yoke 33 forms a bottom surface of the core 603.
Still refer to
Refer to
The first central magnetically conductive yoke 321 is disposed on a top surface 311a of the first central magnet 311. The second central magnetically conductive yoke 322 is disposed on a top surface 311a of the second central magnet 312. In some embodiments, a shape size of the first central magnetically conductive yoke 321 may be the same as a shape size of the first central magnet 311, and a shape size of the second central magnetically conductive yoke 322 may be the same as a shape size of the second central magnet 312.
The edge magnetically conductive yoke 323 is disposed on the top surface of the side magnet 313.
Still refer to
The connecting frame part 3230 is rectangularly frame-shaped. The two first magnetically conductive parts 3231 are symmetrically connected to two sides of the connecting frame part 3230. The two second magnetically conductive parts 3232 are symmetrically connected to the other two sides of the connecting frame part 3230.
The first magnetically conductive part 3231 is approximately of a T-shape, and the first magnetically conductive part 3231 includes a first part 3231a and a second part 3231b. The second part 3231b is connected to the first part 3231a and the connecting frame part 3230. An avoidance gap 3231c is formed on both sides of the second part 3231b of the first magnetically conductive part 3231. The avoidance gap 3231c is located between the first part 3231a of the first magnetically conductive part 3231 and the connecting frame part 3230.
Refer to
Still refer to
Refer to
In this way, a first annular magnetic gap 3a surrounding the first central magnet 311 is formed between the side magnet 313, the inner magnetically conductive part, and the first central magnet 311, and a second annular magnetic gap 3b surrounding the second central magnet 312 is formed between the side magnet 313, the inner magnetically conductive part, and the second central magnet 312.
Based on this, still refer to
A magnetization direction of the side magnet 313 is opposite to the magnetization direction of the first central magnet 311. For example, still refer to
A magnetization direction of the inner magnet 314 is the same as a magnetization direction of the side magnet 313. For example, still refer to
In this way, two magnetic loops I1 and I2 are formed in the magnetic circuit system 3.
A path of the magnetic loop I1 is as follows: the first central magnet 311—the first central magnetically conductive yoke 321—the first magnetic gap 3a—the edge magnetically conductive yoke 323 and the inner magnetically conductive yoke 324—the side magnet 313 and the inner magnet 314—the second magnetically conductive yoke 33—the first central magnet 311.
A path of the magnetic loop I2 is as follows: the second central magnet 312—the second central magnetically conductive yoke 322—the second magnetic gap 3b—the edge magnetically conductive yoke 323 and the inner magnetically conductive yoke 324—the side magnet 313 and the inner magnet 314—the second magnetically conductive yoke 33—the second central magnet 312.
In this way,
It should be noted that when a size of the core 603 in an XY plane is relatively small, a distance between the first voice coil set 22 and the second voice coil set 23 is relatively short, and a width of the inner magnet 314 is relatively small. Because a material of the magnet is usually relatively brittle, a small-sized inner magnet 314 cannot be processed in a current process. In this scenario, the inner magnet 314 may be replaced with another structure.
For example,
For another example,
For another example,
For another example,
For the core 603 provided in this application, designing two voice coils enables the number of turns of voice coils to be far greater than the number of turns of a single voice coil, and a winding length of the voice coils to be longer. As the winding length L of the voice coils is increased, a corresponding power conversion coefficient BL is greater, and a driving force BLi of a speaker module is greater. In addition, on the premise that the driving force remains unchanged, a thickness of a voice coil set and a thickness of the magnetic circuit system may be reduced, to implement a thinning design of the core 603. Therefore, thinning and audio performance can be balanced to some extent for the core 603 provided in this application. In addition, driven by two voice coils, follow performance of parts of the diaphragm is good. This can not only meet a low frequency requirement, but also meet a high frequency requirement. Therefore, a high-frequency speaker module is not to be disposed in the electronic device. This can simplify a structure of the electronic device. In addition, voice coil mass Mms of the two voice coils is relatively large, and a BL of a multi-path magnetic circuit and the two voice coils are relatively large, to enable the speaker module to have a lower Fo and a larger amplitude. Therefore, better low-frequency performance and low-frequency sensitivity are obtained, a capability of playing sound on speaker is increased by 2 dB to 3 dB, greatly improving effect of playing sound on speaker.
It should be noted that, to further optimize a thickness and audio performance of the core 603, a quantity of voice coil sets in the core 603 may be further increased. For example, the quantity may be set to three, four, five, or the like. In addition, in the magnetic circuit system, inner magnetically conductive parts are formed between two adjacent voice coil sets, to form magnetic loops of a corresponding quantity. However, this may increase structural complexity of the core 603. In different application scenarios, cores 603 having voice coil sets with different quantities and magnetic loops with different quantities may be designed in different application scenarios, in consideration of thicknesses, audio performance, and structural complexity of the cores 603.
Because the speaker module 60 provided in the embodiments of this application includes the core 603 in any one of the foregoing embodiments, by using the speaker module 60 or the core 603, a same technical problem can be resolved, and same effect can be achieved.
Because the electronic device 100 provided in some embodiments of this application includes the foregoing speaker module 60, audio performance of the electronic device 100 can be improved while a thinning design of the electronic device 100 is met.
In the descriptions of this specification, specific features, structures, materials, or characteristics may be combined in a proper manner in any one or more of embodiments or examples.
Finally, it should be noted that the foregoing embodiments are merely intended to describe the technical solutions of this application, but not to limit this application. Although this application is described in detail with reference to the foregoing embodiments, persons of ordinary skill in the art should understand that they may still make modifications to the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features thereof, without departing from the spirit and scope of the technical solutions of the embodiments of this application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110723281.3 | Jun 2021 | CN | national |
| 202110938483.X | Aug 2021 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/072624 | 1/18/2022 | WO |
