Patent ID: 12200463

In the drawings:100: loudspeaker;110: housing;120: vibration system;121: diaphragm;1211: central part;1212: bent ring part;1213: fixing part;122: vibrating voice coil;1221: main part;1222: connecting part;123: centering support piece;1231: frame part;1232: mounting part;1233: elastic part;124: coupling voice coil;1241: winding part;130: magnetic circuit system;131: central magnetic circuit part;132: steel magnet;133: magneto-conduct plate;134: magneto-conduct yoke;1341: bottom wall;1342: side wall;135: coupling magnetic circuit part;1351: magnet;1352: gap.

The object realization, functional features and advantages of the present disclosure will be further described in combination with the embodiments and with reference to the accompanying drawings.

DETAILED DESCRIPTION

The following detailed description is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description.

The technical solutions in embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the embodiments as described below are merely part of, rather than all, embodiments of the present disclosure. Based on the embodiments of the present disclosure, any other embodiment obtained by a person of ordinary skill in the art without paying any creative effort shall fall within the protection scope of the present disclosure.

In the present disclosure, unless otherwise expressly specified and defined, the terms “connected”, “fixed” and the like should be understood in a broad sense. For example, it may be fixedly connected, or removably connected, or integrally connected; it may also be mechanically connected or electrically connected; it may also be directly connected or indirectly connected through a middleware; it may also be internally communicated or interacted between two components. For a person of ordinary skill in the art, the specific meaning of these terms in the present disclosure should be understood according to specific situations.

In addition, in the present disclosure, the terms “first”, “second”, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature with “first” or “second” may explicitly or implicitly include at least one such a feature. In addition, the technical solutions in various embodiments of the present disclosure can be combined with each other if their combination is realizable to a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in the present disclosure.

The present disclosure provides a loudspeaker100.

Referring toFIGS.1to3, in an embodiment of the present disclosure, the loudspeaker100comprises: a housing110; and a vibration system120and a magnetic circuit system130that are accommodated in the housing110. The vibration system120comprises a diaphragm121, a vibrating voice coil122and a centering support piece123. The opposite sides of the centering support piece123are respectively connected with the diaphragm121and the vibrating voice coil122, and the centering support piece123is provided thereon with a coupling voice coil124. The magnetic circuit system130comprises: a magneto-conduct yoke134; a central magnetic circuit part131and a side magnetic circuit part that are disposed on the magneto-conduct yoke134; and a coupling magnetic circuit part135disposed above the central magnetic circuit part131. A magnetic gap accommodating the vibrating voice coil122is formed between the central magnetic circuit part131and the side magnetic circuit part. When the coupling voice coil124is energized, upward and downward forces are generated by the magnetic field coupling of the coupling voice coil124and the coupling magnetic circuit part135.

In order to simplify the description, a side of the diaphragm121that is away from the magnetic circuit system130is called an upper side, and a side of the diaphragm121that is facing the magnetic circuit system130is called a lower side.

The housing110is generally made of plastic and defines an outer profile of the whole loudspeaker100. The housing110is in the shape of a horn which is open at both the top and bottom. The vibration system120and the magnetic circuit system130are disposed inside of the housing110, the vibration system120is installed from the top of the housing110, and the magnetic circuit system130is installed from the bottom of the housing110. The housing110is further provided thereon with a pressure relief hole which is communicated with an inner cavity of the housing110. The pressure relief hole is used to reduce the vibration resistance of the diaphragm121when the diaphragm121agitates the air. The magneto-conduct yoke134in the magnetic circuit system130shown in the drawings of the application is in a bowl shape. The magnetic circuit system130further comprises: a central magnetic circuit part131disposed on an inner side of the magneto-conduct yoke134, and a side magnetic circuit part facing the central magnetic circuit part131, and a magnetic gap is formed between the central magnetic circuit part131and the side magnetic circuit part. The central magnetic circuit part131comprises a steel magnet132and a magneto-conduct plate133covering an upper surface of the steel magnet132. The magneto-conduct yoke134is in a bowl shape, and comprises a bottom wall1341and a cylindrical side wall1342connected with the bottom wall1341. The side wall1342is connected with the bottom of the housing110and forms the side magnetic circuit part. It can be understood that, in other embodiments, besides the side wall1342of the magneto-conduct yoke134shown in the drawings, the side magnetic circuit part may also be provided with a side magnet facing the steel magnet132. In the present application, the vibrating voice coil122and the coupling voice coil124are electrically independent of each other, that is, they are controlled by different circuits. When the loudspeaker100works, the vibrating voice coil122is magnetically coupled with the magnetic circuit system130under the action of changing current, and the vibrating voice coil122is then pulled into the magnetic gap and pushed out of the magnetic gap to drive the diaphragm121to vibrate. During the vibration of the diaphragm121, the coupling voice coil124will also be magnetically coupled with the coupling magnetic circuit part135under the action of changing current, and also generate upward and downward forces applied to the diaphragm121to push and pull the diaphragm121upward and downward, so that vibration state of the diaphragm121, such as the vibration frequency and amplitude, can be adjusted during the high-frequency vibration of the diaphragm121.

In the technical solution of the present disclosure, the centering support piece123is provided in the loudspeaker100, the opposite sides of the centering support piece123are respectively connected with the diaphragm121and the vibrating voice coil122, the coupling voice coil124is provided on the centering support piece123, and the coupling magnetic circuit part135corresponding to the coupling voice coil124is provided above the central magnetic circuit part131. Thus, when the loudspeaker100works, the coupling voice coil124is energized to generate magnetism and can be magnetically coupled with the coupling magnetic circuit part135, so that when the vibrating voice coil122drives the diaphragm121to vibrate and make a sound, the coupling voice coil124and the coupling magnetic circuit part135are magnetically coupled to push and pull and expand the diaphragm121, thereby changing the vibration state of the high-frequency zone of the diaphragm121(suppressing the high-frequency split vibration), and finally improving the high-frequency performance of the loudspeaker100.

In the present application, the diaphragm121comprises: a fixing part1213at the outermost part, a central part1211at the center part, and a bent ring part1212connecting the fixing part1213and the central part1211. The coupling voice coil124is of a flat shape and fixedly connected with the central part1211, that is, the diaphragm121is connected with the upper side of the centering support piece123. In this way, the vibration state of the diaphragm121can be adjusted more sensitively and effectively; moreover, the space inside the loudspeaker100can be effectively utilized. In other embodiments, the coupling voice coil124may also be a three-dimensional structure rather than a flat shape.

Referring toFIG.2,FIG.3andFIG.5, in some embodiments, the centering support piece123comprises: a frame part1231provided at the edges, a mounting part1232provided at the center, and an elastic part1233connected with the frame part1231and the mounting part1232at two sides respectively. The frame part1231is fixed on the housing110. The frame part1231and the elastic part1233are provided with a first conductive wiring electrically connected with the coupling voice coil124and a second conductive wiring electrically connected with the vibrating voice coil122. By providing integrated first and second conductive wirings on the frame part1231and the elastic part1233, the conductive structure is simplified, and the structure of the centering support piece123is fully utilized, which is conducive to reducing the cost. The first conductive wiring, the second conductive wiring, and the coupling voice coil124may be formed by, for example, copper foil etching, conductive material printing, conductive material plating, etc. In the present application, the coupling voice coil124is formed by arranging and winding wirings along a plane where the mounting part1232is located. In some embodiments, the coupling voice coil124may be embedded inside the centering support piece123, so that the structure is stronger. In other embodiments, the coupling voice coil124may be located on the surface of the centering support piece123facing the diaphragm121, that is, on the upper surface of the centering support piece123, so that the manufacturing process is easy and convenient.

The coupling design of the coupling magnetic circuit part135and the coupling voice coil124is as follows.

In some embodiments, referring toFIG.4, the coupling magnetic circuit part135comprises magnets1351provided at intervals. A plurality of magnets1351are provided at intervals, and a gap1352is formed between adjacent magnets1351. The coupling voice coil124comprises a winding part1241corresponding to the gap1352. The magnetic poles of the two adjacent magnets1351towards the diaphragm121are different. The winding part1241on the coupling voice coil124corresponding to the gap1352has the same current direction when it is energized. Thus, when the coupling voice coil124is energized, according to the left-hand rule, the coupling voice coil124, as an energized conductor, may be subject to upward or downward ampere forces in the magnetic field formed by two adjacent magnets1351, so as to push the diaphragm121upward or pull the diaphragm121downward, thereby changing the vibration state of the high-frequency zone of the diaphragm121, and finally improving the high-frequency performance of the loudspeaker100.

In the above design, the magnets1351in the coupling magnetic circuit part135are ring-shaped and provided at intervals, and the plurality of magnets1351may be concentric rings spaced from each other, while the winding part1241of the coupling voice coil124is ring-shaped so as to match the magnetic circuit formed by the plurality of magnets1351(in the actual winding process, the coupling voice coil124forms a ring structure by spiral winding, as shown inFIG.6). Alternatively, the coupling magnetic circuit part135may comprise long strip-shaped magnets1351provided at intervals, and the winding part1241may be, for example, straight line-shaped as shown inFIG.7. The two winding methods stated above can make the coupling voice coil124occupy the whole mounting part1232of the centering support piece123; moreover, the conductive design of the coupling voice coil124is simple, and the adjustment in the vibration process of the vibrating voice coil122is more sensitive.

The present disclosure also provides an earphone. The earphone comprises a casing and a loudspeaker100. An accommodating cavity is provided inside the casing. For the specific structure of the loudspeaker100, please refer to the above embodiments. Since the loudspeaker100adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The loudspeaker100is installed in the accommodating cavity. The casing is provided with an acoustic hole corresponding to the diaphragm121. The earphone may be a portable earphone for mobile phones, tablet computers, etc.

The above only describes optional embodiments of the present disclosure, and does not limit the scope of the present disclosure. All equivalent structural substitutions made based on the contents of the description and drawings of the present disclosure and under the inventive concept of the present disclosure, or directly/indirectly applications in other relevant technical fields shall be included in the scope of patent protection of the present disclosure.

While at least one exemplary embodiment has been presented in the foregoing detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the invention as set forth in the appended claims and their legal equivalents.