loudspeaker

Abstract

A loudspeaker (100), comprising: a basket (1), a vibration system (2), a magnetic circuit system (3), and a flexible circuit board (4) embedded from a bottom end of the basket (1), wherein the vibration system (2) and the magnetic circuit system (3) are respectively fixed to two ends of the basket (1) and jointly define a sound generation inner cavity (8); the magnetic circuit system (3) comprises a lower clamping plate (31) and main magnetic steel (32); the lower clamping plate (31) comprises a lower clamping plate body (311), two rectangular through holes (312) and two first flanges (313), and the shape and size of each first flange (313) match those of the rectangular through hole (312) corresponding thereto; the two first flanges (313) are spaced apart from the main magnetic steel (32) and jointly define a magnetic gap (34); a part of the lower clamping plate body (311) located on the side of the rectangular through hole (312) facing away from the main magnetic steel (32) directly faces and is fixed to the basket (1), and abuts against the flexible circuit board (4); and the rectangular through holes (312) and the sound generation inner cavity (8) are in communication with the outside. The loudspeaker (100) further comprises two breathable isolating members (5) which are fixed to the lower clamping plate body (311) in a covering manner and respectively cover the two rectangular through holes (312). In this way, FPC wiring is convenient, the cost is reduced, and a good acoustic performance is provided.

Description

speaker Technical Field

[0001] The utility model relates to the field of electroacoustic conversion, in particular to a loudspeaker used in electronic speaker products. Background Art

[0002] With the advent of the mobile internet era, the number of smart mobile devices continues to rise. Among these devices, mobile phones are undoubtedly the most common and portable. Currently, mobile phones have a wide variety of functions, including high-quality music and vibration functions. Therefore, speakers for playing sound are widely used in today's smart mobile devices.

[0003] The speaker of the related technology includes a basin frame, and a vibration system and a magnetic circuit system respectively fixed to the basin frame; the magnetic circuit system includes a lower splint, a main magnet and a pole core fixed on the lower splint, and the lower splint is torn and bent from the edge of the outer shape to form a vertical flange, and the flange is separated from the main magnet and the pole core to form a magnetic gap. Technical issues

[0004] However, due to reasons such as FPC routing, the speakers in the related technology fix the FPC between the basin frame and the lower plywood, which will inevitably form a large hole after the lower plywood is flanged and the dust cover cannot be affixed, resulting in the rear cavity of the speaker not being able to be sealed and prevented from debris, and cannot be used in an environment where the rear cavity is open. At the same time, speaker leakage can only be corrected by changing the shape of the basin frame and the lower plywood. Remolding of parts is time-consuming and labor-intensive, resulting in excessively high costs.

[0005] Therefore, it is necessary to provide a new loudspeaker to solve the above technical problems. Technical Solutions

[0006] The purpose of the utility model is to provide a loudspeaker with good leakage effect, low cost and excellent acoustic performance.

[0007] To achieve the above-mentioned object, the present invention provides a loudspeaker comprising a frame, a vibration system, a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate and produce sound, and a flexible circuit board embedded in the bottom end of the frame. The vibration system and the magnetic circuit system are respectively fixed to the two ends of the frame and together form a sound-producing cavity.

[0008] The vibration system includes a diaphragm fixed to the basin frame and a voice coil driving the diaphragm to vibrate and produce sound, and the voice coil is inserted in the magnetic gap;

[0009] The magnetic circuit system includes a lower clamping plate and a main magnetic steel stacked and fixed on the lower clamping plate;

[0010] The lower clamping plate includes a lower clamping plate body, two rectangular through holes penetrating the lower clamping plate body and respectively located on opposite sides of the main magnetic steel, and two first flanges formed on a side of the two rectangular through holes close to the main magnetic steel and extending close to the diaphragm, wherein the shape and size of each first flange match the corresponding rectangular through hole; the two first flanges are respectively spaced from the main magnetic steel and together form the magnetic gap; the portion of the lower clamping plate body located on a side of the rectangular through hole away from the main magnetic steel is directly opposite to the basin frame and is fixed to the basin frame, and abuts against the flexible circuit board, and the rectangular through hole is connected to the sound-emitting cavity and the outside world;

[0011] The loudspeaker further comprises two breathable isolation pieces which are fixed to the lower clamping plate body and respectively cover the two rectangular through holes.

[0012] Preferably, the lower splint also includes two avoidance positions and two second flanges formed by tearing and bending the other two opposite sides of the lower splint body toward the direction of the vibration system, and the basin frame is inserted into the avoidance positions, and the two second flanges are respectively spaced from the main magnet and together form the magnetic gap.

[0013] Preferably, the lower clamping plate further includes a limiting portion formed by extending from the other two opposite sides of the lower clamping plate body toward the vibration system;

[0014] The basin frame includes a basin frame body, a first extension portion formed by extending from two opposite sides of the basin frame body toward a side close to the magnetic circuit system, a second extension portion formed by extending from the other two opposite sides of the basin frame body toward a side close to the magnetic circuit system, and a limiting groove formed by the second extension portion being recessed in a direction away from the magnetic circuit system; the first extension portion is arranged on a side of the rectangular through hole away from the magnetic circuit system, the second extension portion is arranged in the avoidance position, and the limiting portion is arranged in the limiting groove.

[0015] Preferably, the lower clamping plate further comprises an inner surface proximate to the vibration system and an outer surface disposed opposite the inner surface, the lower clamping plate being provided with a groove formed by recessing from the outer surface toward the inner surface, the rectangular through-hole being disposed within the groove, and the breathable spacer being received within the groove and covering the rectangular through-hole. 5. The loudspeaker according to claim 1, characterized in that the lower clamping plate further comprises two bosses formed by the outer peripheries of opposite sides of the lower clamping plate body extending in the vibration direction; the two bosses are respectively located on the side of the two rectangular through-holes away from the main magnet; and the two bosses are secured to the basin frame.

[0016] Preferably, the flexible circuit board includes an elastic conductive member fixed to the basin frame and a connecting portion formed by extending from a side of the elastic conductive member away from the main magnetic steel, and the elastic conductive member is electrically connected to the voice coil.

[0017] Preferably, the diaphragm includes an annular fold and an annular vibration part fixed to the inner periphery of the fold, the outer periphery of the fold is fixed to the basin frame, and the voice coil is fixed to the side of the vibration part close to the magnetic circuit system.

[0018] Preferably, the vibration system further comprises an auxiliary dome fixed to a side of the vibration part close to the magnetic circuit system, and the voice coil is fixed to a side of the auxiliary dome close to the magnetic circuit system.

[0019] Preferably, the magnetic circuit system further includes a pole core stacked and fixed to the main magnetic steel.

[0020] Preferably, the speaker further comprises a cover plate fixed to the basin frame, a sound outlet hole penetrating the cover plate, and a dust cover fixed to the cover plate and covering the sound outlet hole. Beneficial effects

[0021] Compared with the prior art, the loudspeaker of the present invention includes a basin, a vibration system and a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate and produce sound, and a flexible circuit board embedded in the bottom end of the basin, the vibration system and the magnetic circuit system are respectively fixed to the two ends of the basin and together form a sound-generating inner cavity; the lower splint of the magnetic circuit system includes a lower splint body, two rectangular through holes penetrating the lower splint body and respectively located on opposite sides of the main magnet, and two first flanges formed on the side of the two rectangular through holes close to the main magnet and extending toward the diaphragm, the shape and size of each first flange matching the corresponding rectangular through hole; the two first flanges are respectively spaced from the main magnet and together form a magnetic gap; the part of the lower splint body located on the side of the rectangular through hole away from the main magnet is opposite to the basin and fixed to the basin, and abuts against the flexible circuit board, the rectangular through hole and the sound-generating inner cavity are connected to the outside world; the loudspeaker also includes two breathable isolation members fixed to the lower splint body and covering the two rectangular through holes respectively. The rectangular through-holes are provided to facilitate the FPC routing position of the flexible circuit board to be covered on the lower clamping plate, which makes the FPC routing installation convenient and saves costs. At the same time, two breathable isolation members are fixed to the lower clamping plate body and cover the two rectangular through-holes, which effectively changes the damping of the breathable isolation members and accurately adjusts the control, so that the acoustic performance of the speaker can be adjusted more conveniently and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0023] FIG1 is a schematic diagram of the three-dimensional structure of the loudspeaker of the present invention;

[0024] FIG2 is an exploded view of the three-dimensional structure of the speaker of the present invention;

[0025] FIG3 is a cross-sectional view along line AA in FIG1 ;

[0026] FIG4 is a cross-sectional view along line BB in FIG1 ;

[0027] FIG5 is a schematic structural diagram of the speaker frame of the present invention;

[0028] FIG6 is a schematic structural diagram of the lower plate of the loudspeaker of the present invention;

[0029] FIG7 is a perspective exploded view of the bottom surface of the loudspeaker of the present invention. Modes for Carrying Out the Invention

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Please refer to Figures 1 to 7 at the same time. The present invention provides a loudspeaker 100, which includes a basin frame 1, a vibration system 2 fixed to the basin frame 1, a magnetic circuit system 3 having a magnetic gap 34 and driving the vibration system 2 to vibrate and produce sound, and a flexible circuit board 4 embedded in the bottom end of the basin frame 1. The vibration system 2 and the magnetic circuit system 3 are respectively fixed to the two ends of the basin frame 1 and together form a sound-producing cavity 8.

[0032] The vibration system 2 includes a diaphragm 21 fixed to the basin frame 1 and a voice coil 22 driving the diaphragm 21 to vibrate and produce sound. The voice coil 22 is inserted into the magnetic gap 34 .

[0033] The magnetic circuit system 3 includes a lower clamping plate 31 and a main magnetic steel 32 stacked and fixed on the lower clamping plate 31 .

[0034] In this embodiment, the magnetic circuit system 3 further includes a pole core 33 stacked and fixed to the main magnetic steel 32. The lower clamping plate 31 is used to support and fix the main magnetic steel 32. The pole core 33 is stacked and fixed on the main magnetic steel 32 to increase the magnetic force of the main magnetic steel 32.

[0035] The lower clamping plate 31 includes a lower clamping plate body 311, two rectangular through holes 312 that pass through the lower clamping plate body 311 and are respectively located on opposite sides of the main magnet 32, and two first flanges 313 formed on the side of the two rectangular through holes 312 close to the main magnet 32 ​​and extending close to the diaphragm 21, and the shape and size of each first flange 313 match the corresponding rectangular through hole 312; the two first flanges 313 are respectively spaced from the main magnet 32 ​​and together form the magnetic gap 34; the part of the lower clamping plate body 311 located on the side of the rectangular through hole 312 away from the main magnet 32 ​​is opposite to the basin frame 1 and is fixed to the basin frame 1, and abuts against the flexible circuit board 4, and the rectangular through hole 312 is connected to the sound cavity 8 and the outside world.

[0036] More preferably, the two rectangular through-holes 312 and the two first flanges 313 are formed by tearing and bending opposite sides of the lower clamping plate body 311 toward the vibration system 2. The first flanges 313 are formed by bending the portion of the lower clamping plate body 311 corresponding to the rectangular through-holes 312, so that the first flanges 313 completely fill the rectangular through-holes 312. The flexible circuit board 4 is located on the side of the rectangular through-hole 312 that is closest to the vibration system 2. By tearing and bending opposite sides (on both sides of the short axis) of the lower clamping plate body 311, the first flanges 313 are formed by bending the lower clamping plate body 311 toward the vibration system 2. Of course, since the first flanges 313 are formed by tearing a portion of the lower clamping plate body 311, thus forming the rectangular through-holes 312 in the lower clamping plate body 311, manufacturing is simplified and cost-effective. The provision of the rectangular through-holes 312 facilitates the FPC routing of the flexible circuit board 4 to be covered on the lower clamping plate 31, making the FPC routing installation easier.

[0037] More specifically, the portion of the lower clamping plate body 311 located on the side of the rectangular through hole 312 away from the main magnet 32 ​​is directly opposite to the basin frame 1 and is fixed to the basin frame 1; the portion of the opening on the basin frame 1 for installing the FPC is covered, so that the FPC wiring is given way, saving installation space.

[0038] The speaker 100 further includes two breathable spacers 5 fixed to the lower clamping plate body 311 and covering the two rectangular through holes 312. The damping of the breathable spacers 5 can be effectively changed and precisely adjusted to control the acoustic performance of the speaker 100 more conveniently and quickly.

[0039] In this embodiment, the lower splint 31 also includes two avoidance positions 315 and two second flanges 314 formed by tearing and bending the other opposite sides of the lower splint body 311 toward the direction of the vibration system 2. The basin frame 1 is inserted into the avoidance position 315. The two second flanges 314 are respectively spaced apart from the main magnet 32 ​​and together form the magnetic gap 34. The two second flanges 314 are formed on both sides of the long axis of the lower splint body 311, and the two second flanges 314 and the two first flanges 313 are respectively spaced apart from the main magnet 32 ​​to form a magnetic gap 34. At the same time, the first flange 313 and the second flange 314 can also limit the side of the main magnet 32, and the fixing effect is better. The avoidance position 315 facilitates the installation of the basin frame 1, saves space for the overall speaker 100, and saves costs.

[0040] In this embodiment, the lower clamping plate 31 further includes limiting portions 317 formed by extending from two opposite sides of the lower clamping plate body 311 toward the vibration system 2 .

[0041] The basin frame 1 includes a basin frame body 11, first extensions 12 extending from opposite sides of the basin frame body 11 toward a side closer to the magnetic circuit system 3, second extensions 13 extending from other opposite sides of the basin frame body 11 toward a side closer to the magnetic circuit system 3, and a retaining groove 14 formed by the second extension 13 recessed away from the magnetic circuit system 3. The first extension 12 is disposed on a side of the rectangular through hole 312 away from the magnetic circuit system 3, the second extension 13 is disposed within the avoidance position 315, and the retaining portion 317 is disposed within the retaining groove 14. This facilitates assembly between the basin frame 1 and the lower clamping plate 31, ensuring good fixation.

[0042] In this embodiment, the lower clamping plate 31 further includes an inner surface 31a adjacent to the vibration system 2 and an outer surface 31b opposite to the inner surface 31a. The lower clamping plate 31 is provided with a groove 31c formed from the outer surface 31b toward the inner surface 31a. The rectangular through hole 312 is disposed within the groove 31c. The breathable spacer 5 is received within the groove 31c and covers the rectangular through hole 312. This allows the breathable spacer 5 to be attached to the groove 31c, with the lower surface of the breathable spacer 5 parallel to the outer surface 31b of the lower clamping plate 31, preventing the breathable spacer 5 from protruding from the outer surface 31b of the lower clamping plate 31, resulting in a good fixing effect and aesthetically pleasing appearance.

[0043] In this embodiment, the lower clamping plate 31 further includes two bosses 316 extending from the outer edges of opposite sides of the lower clamping plate body 311 in the vibration direction. The bosses 316 are located on the sides of the two rectangular through-holes 312 away from the main magnet 32. The bosses 316 are secured to the frame 1. The bosses 316 and the first flange 313 engage with the first extension 12 of the frame 1, positioning the first extension 12 between the bosses 316 and the first flange 313. Furthermore, a breathable spacer 5 is attached to the rectangular through-hole 312, sealing the speaker 100 and preventing foreign matter. This allows the speaker 100 to be used in an environment with an open rear cavity.

[0044] In this embodiment, the flexible circuit board 4 includes an elastic conductive member 41 fixed to the frame 1 and a connecting portion 42 extending from the side of the elastic conductive member 41 away from the main magnet 32. The elastic conductive member 41 is electrically connected to the voice coil 22. An external power source is connected via the connecting portion 42 and transmitted to the voice coil 22 through the elastic conductive member 41, thereby powering the voice coil 22 and causing the voice coil 22 to vibrate and produce sound.

[0045] More preferably, the elastic conductive member 41 is made of FPC (flexible printed circuit board), which has good elasticity and is convenient for conducting electricity to the voice coil 22 .

[0046] In this embodiment, the diaphragm 21 includes an annular fold 211 and an annular vibration portion 212 fixed to the inner periphery of the fold 211. The outer periphery of the fold 211 is fixed to the basin frame 1, and the voice coil 22 is fixed to the side of the vibration portion 212 close to the magnetic circuit system 3.

[0047] In this embodiment, the vibration system 2 further includes an auxiliary dome 23 fixed to the side of the vibrating portion 212 near the magnetic circuit system 3, and the voice coil 22 is fixed to the side of the auxiliary dome 23 near the magnetic circuit system 3. The voice coil 22 is fixed to the side of the auxiliary dome 23 near the magnetic circuit system 3. The provision of the auxiliary dome 23 allows the voice coil 22 to be further inserted into the magnetic gap 34, thereby improving the vibration performance of the diaphragm 21.

[0048] In this embodiment, the speaker 100 further includes a cover plate 6 fixed to the frame 1, a sound outlet 61 extending through the cover plate 6, and a dust cover 7 fixed to the cover plate 6 and covering the sound outlet 61. The sound generated by the diaphragm 21 driven by the voice coil 22 is transmitted through the sound outlet 61, thereby improving the acoustic performance of the speaker 100. The dust cover 7 protects the diaphragm 21 from dust.

[0049] Optionally, there are four sound holes 61 , which are evenly distributed on the cover plate 6 .

[0050] More preferably, the sound outlet 61 is a rectangular structure, which is easy to manufacture and saves costs.

[0051] Compared with the related art, the loudspeaker of the present invention includes a basin, a vibration system and a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate and produce sound, and a flexible circuit board embedded in the bottom end of the basin, the vibration system and the magnetic circuit system are respectively fixed to the two ends of the basin and together form a sound-generating inner cavity; the lower splint of the magnetic circuit system includes a lower splint body, two rectangular through holes that pass through the lower splint body and are respectively located on opposite sides of the main magnet, and two first flanges formed on the side of the two rectangular through holes close to the main magnet and extending toward the diaphragm, the shape and size of each first flange matching the corresponding rectangular through hole; the two first flanges are respectively spaced from the main magnet and together form a magnetic gap; the part of the lower splint body located on the side of the rectangular through hole away from the main magnet is opposite to the basin and fixed to the basin, and abuts against the flexible circuit board, the rectangular through hole and the sound-generating inner cavity are connected to the outside world; the loudspeaker also includes two breathable isolation parts that are fixed to the lower splint body and cover the two rectangular through holes respectively. The rectangular through-holes are provided to facilitate the FPC routing position of the flexible circuit board to be covered on the lower clamping plate, which makes the FPC routing installation convenient and saves costs. At the same time, two breathable isolation members are fixed to the lower clamping plate body and cover the two rectangular through-holes, which effectively changes the damping of the breathable isolation members and accurately adjusts the control, so that the acoustic performance of the speaker can be adjusted more conveniently and quickly.

[0052] The above is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the scope of protection of the present invention.

Claims

1. A speaker, comprising a basin frame, a vibration system, and a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate and generate sound, and a flexible circuit board embedded in the bottom end of the basin frame, wherein the vibration system and the magnetic circuit system are respectively fixed to both ends of the basin frame and together form a sound-generating inner cavity; The vibration system includes a diaphragm fixed to the basin frame and a voice coil driving the diaphragm to vibrate and produce sound, and the voice coil is inserted in the magnetic gap; The magnetic circuit system comprises a lower clamping plate and a main magnetic steel stacked and fixed on the lower clamping plate; characterized in that: The lower clamping plate comprises a lower clamping plate body, two rectangular through holes penetrating the lower clamping plate body and respectively located at opposite sides of the main magnetic steel, and two first flanges formed on one side of the two rectangular through holes close to the main magnetic steel and extending close to the diaphragm, wherein the shape and size of each first flange match the corresponding rectangular through hole; the two first flanges are respectively spaced from the main magnetic steel and jointly form the magnetic gap; the portion of the lower clamping plate body located on the side of the rectangular through hole away from the main magnetic steel is directly opposite to the basin frame and fixed to the basin frame, and abuts against the flexible circuit board, and the rectangular through hole is connected to the sound-emitting inner cavity and the outside world; The speaker also includes two air-permeable isolation pieces which are fixed to the lower clamping plate body and cover the two rectangular through holes respectively.

2. The loudspeaker according to claim 1, characterized in that The lower clamping plate also includes two avoidance positions and two second flanges formed by tearing and bending the other two opposite sides of the lower clamping plate body toward the direction of the vibration system. The basin frame is inserted into the avoidance positions, and the two second flanges are respectively spaced from the main magnetic steel and together form the magnetic gap.

3. The loudspeaker according to claim 2, characterized in that The lower clamping plate further comprises a limiting portion formed by the other two opposite sides of the lower clamping plate body extending in the direction of the vibration system; The basin frame includes a basin frame body, a first extension portion formed by extending from two opposite sides of the basin frame body toward a side close to the magnetic circuit system, a second extension portion formed by extending from the other two opposite sides of the basin frame body toward a side close to the magnetic circuit system, and a limiting groove formed by the second extension portion being recessed in a direction away from the magnetic circuit system; the first extension portion is arranged on a side of the rectangular through hole away from the magnetic circuit system, the second extension portion is arranged in the avoidance position, and the limiting portion is arranged in the limiting groove.

4. The loudspeaker according to claim 1, characterized in that The lower clamping plate also includes an inner surface close to the vibration system and an outer surface arranged opposite to the inner surface. The lower clamping plate is provided with a groove formed by being sunken from the outer surface to the inner surface. The rectangular through hole is arranged in the groove. The breathable isolation piece is accommodated in the groove and covers the rectangular through hole.

5. The loudspeaker according to claim 1, characterized in that The lower clamping plate also includes two bosses formed by the outer peripheral edges of the opposite sides of the lower clamping plate body extending toward the vibration direction; the two bosses are respectively located on the side of the two rectangular through holes away from the main magnetic steel; and the two bosses are fixed to the basin frame.

6. The loudspeaker according to claim 1, characterized in that The flexible circuit board includes an elastic conductive member fixed to the basin frame and a connecting portion formed by extending from a side of the elastic conductive member away from the main magnetic steel, and the elastic conductive member is electrically connected to the voice coil.

7. The loudspeaker according to claim 1, characterized in that The diaphragm includes an annular folding ring and an annular vibration part fixed to the inner periphery of the folding ring. The outer periphery of the folding ring is fixed to the basin frame, and the voice coil is fixed to a side of the vibration part close to the magnetic circuit system.

8. The loudspeaker according to claim 7, characterized in that The vibration system further includes an auxiliary dome fixed to a side of the vibration part close to the magnetic circuit system, and the voice coil is fixed to a side of the auxiliary dome close to the magnetic circuit system.

9. The loudspeaker according to claim 1, characterized in that The magnetic circuit system also includes a pole core stacked and fixed on the main magnetic steel.

10. The loudspeaker according to claim 1, characterized in that The speaker also includes a cover plate fixed to the basin frame, a sound outlet hole penetrating the cover plate, and a dust cover fixed to the cover plate and covering the sound outlet hole.

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