Loudspeaker

Abstract

A loudspeaker (100), comprising a basket (1), a vibration system (2), a magnetic circuit system (3), and a flexible circuit board (4). The vibration system (2) comprises a diaphragm (21) and a voice coil (22). The magnetic circuit system (3) comprises a lower clamping plate (31) and main magnetic steel (32), and is rectangular in shape. The lower clamping plate (31) comprises a lower clamping plate body (311), four rectangular through holes (312) penetrating four peripheral sides of the lower clamping plate (31), and four first flanges (313) respectively formed on the sides of the four rectangular through holes (312) close to the main magnetic steel (32). The parts of the lower clamping plate body (311) located on the sides of the rectangular through holes (312) away from the main magnetic steel (32) directly face the basket (1), are fixed to the basket (1) and abut against the flexible circuit board (4). The loudspeaker (100) further comprises four air-permeable isolation members (5) fixed to the lower clamping plate body (311) and respectively covering the four rectangular through holes (312). The loudspeaker (100) not only can be used in environments in which a sound production inner cavity (10) is open, but also can meet greater leakage requirements, thereby reducing costs while improving the acoustic performance of the loudspeaker (100).

Description

speaker Technical Field

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

[0002] With the advent of the mobile Internet era, the types of smart mobile devices are constantly being updated. Among the many types of smart mobile devices, speakers have become their most basic accessories.

[0003] The loudspeaker mainly includes a basin frame, a vibration system fixed to the basin frame, a magnetic circuit system that drives the vibration system to vibrate, and a flexible circuit board fixed to the basin frame; wherein, the vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate, and the magnetic circuit system mainly includes a lower splint and a main magnet fixed to the lower splint. The lower splint is torn and bent from its outer edge to form a vertical flange. The flange is separated from the main magnet to form a magnetic gap, and the voice coil is inserted and suspended in the magnetic gap. Technical issues

[0004] However, due to the routing of the flexible circuit board, the speaker of the related technology will fix the flexible circuit board between the basin frame and the lower plywood, which will inevitably form a large hole after the lower plywood is flanged and the dustproof parts cannot be affixed, resulting in the speaker's sound cavity not being sealed and protected from debris, that is, it cannot be used in an environment where the sound cavity is open. At the same time, the leakage of the speaker can only be changed by changing the shape of the basin frame and the lower plywood, which ultimately leads to time-consuming and labor-intensive part remolding, making the cost too high.

[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 which can be used in an environment where a sound-generating inner cavity is open and has 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 a flexible circuit board embedded in the bottom end of the frame; the vibration system and the magnetic circuit system are respectively fixed to both ends of the frame and together enclose a sound-generating cavity;

[0008] The vibration system includes a diaphragm fixed to the basin frame and a voice coil driving the diaphragm to vibrate; the voice coil is inserted and suspended 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 magnetic circuit system is rectangular; the lower clamping plate includes a lower clamping plate body, four rectangular through holes penetrating the lower clamping plate body and respectively located on the four sides of the main magnetic steel, and four first flanges respectively formed on the side of the four rectangular through holes close to the main magnetic steel and extending in the direction close to the diaphragm; the shape and size of each first flange respectively match the corresponding rectangular through hole, and the four 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 the side of the rectangular through hole away from the main magnetic steel is opposite to the basin and is fixed to the basin, and abuts against the flexible circuit board, and the rectangular through hole connects the sound-emitting cavity with the outside world;

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

[0012] Preferably, the four first flanges are respectively arranged in the middle area of ​​the four sides of the lower clamping plate body.

[0013] Preferably, four grooves that are recessed inward and spaced apart from each other are provided on the side of the lower splint away from the vibration system; the four rectangular through holes are respectively provided in the areas of the four grooves, and the four breathable isolation members are respectively fixed in the four grooves.

[0014] Preferably, the lower clamping plate also includes four second flanges formed by the four edges of the lower clamping plate body being bent and extended in the direction of the diaphragm; the four second flanges respectively extend to the side of the flexible circuit board away from the basin frame and abut against the flexible circuit board, and the four second flanges are respectively spaced relative to the four first flanges to form four locking positions; the positions of the basin frame corresponding to the four locking positions are respectively provided with four limiting parts protruding and extending in the direction close to the lower clamping plate; the four limiting parts respectively extend to the four locking positions and are locked in the four locking positions.

[0015] Preferably, the lower splint also includes four avoidance positions formed respectively through the four corners thereof; the basin rack is respectively provided with four support parts protruding and extending in the direction close to the lower splint at the positions corresponding to the four avoidance positions; the four support parts respectively extend to the four avoidance positions and are fixedly connected to the lower splint body.

[0016] Preferably, the magnetic circuit system further includes a pole core stacked and fixed on a side of the main magnetic steel close to the vibration system.

[0017] Preferably, the diaphragm includes an annular fold and an annular vibration part formed by extending from 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 the inner periphery of the vibration part; and the voice coil is fixed to a side of the auxiliary dome close to the magnetic circuit system.

[0019] Preferably, the speaker further comprises a cover plate fixed on the basin frame and surrounding the vibration system to form a front cavity; a sound outlet hole is provided on the cover plate; the speaker further comprises a dust cover fixed on the cover plate and covering the sound outlet hole.

[0020] Preferably, the speaker also includes two elastic members; the elastic member includes a first fixed arm fixed to the basin frame, two second fixed arms respectively supported and fixed on the side of the voice coil away from the diaphragm, and two elastic arms extending from the first fixed arm to the two second fixed arms respectively and forming a fixed connection; one of the elastic members serves as the flexible circuit board, and the first fixed arm of the elastic member serving as the flexible circuit board is provided with a connecting portion extending in a direction away from the second fixed arm. Beneficial effects

[0021] Compared with the related art, the speaker of the present invention embeds the flexible circuit board into the bottom end of the basin frame, and arranges four rectangular through holes on the four sides of the lower plywood body respectively, and arranges four first flanges extending toward the diaphragm on the side of the four rectangular through holes close to the main magnet, and makes the part of the lower plywood body located on the side of the rectangular through holes away from the main magnet abut against the flexible circuit board, so that the larger leakage requirements of the speaker can be met by the arrangement of the four rectangular through holes, and the routing position of the flexible circuit board can be covered to the side of the lower plywood close to the basin frame, so that the parts of the speaker do not need to be re-molded, thereby saving time and manpower to reduce costs; at the same time, the four breathable isolation members are respectively fixed to the lower plywood body and cover the four rectangular through holes, so that not only can the sound unit be used in an environment where the sound cavity is open, but also the leakage of the speaker can be accurately adjusted and controlled by changing the damping of the breathable isolation member, so that the acoustic performance of the speaker can be adjusted more conveniently and quickly to make its acoustic performance better. 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 overall structure of the speaker of the present invention;

[0025] FIG3 is an exploded view of a portion of the structure of the speaker of the present invention;

[0026] FIG4 is a cross-sectional view taken along line AA in FIG1 .

[0027] Among them, 100, speaker; 1, basin frame; 11, limit part; 12, support part; 2, vibration system; 21, diaphragm; 211, folding ring; 212, vibration part; 22, voice coil; 23, auxiliary dome; 3, magnetic circuit system; 31, lower splint; 311, lower splint body; 312, rectangular through hole; 313, first flange; 314, second flange; 32, main magnet; 33, pole core; 4, flexible circuit board; 41, first fixed arm; 42, elastic arm; 43, second fixed arm; 44, connecting part; 5, breathable isolation part; 6, cover; 7, dust cover; 8, elastic part; 10, sound cavity; 20, magnetic gap; 30, groove; 40, clamping position; 50, avoidance position; 60, front cavity; 70, sound hole. Modes for Carrying Out the Invention

[0028] 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.

[0029] As shown in Figures 1 to 4, an embodiment of the present invention provides a speaker 100, which includes a basin frame 1, a vibration system 2, a magnetic circuit system 3 having a magnetic gap 20 and driving the vibration system 2 to vibrate, and a flexible circuit board 4 embedded in the bottom end of the basin frame 1.

[0030] 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-generating cavity 10 .

[0031] Specifically, the vibration system 2 includes a diaphragm 21 whose outer periphery is fixed to the basin frame 1 and a voice coil 22 that drives the diaphragm 21 to vibrate; the voice coil 22 is inserted and suspended in the magnetic gap 20 .

[0032] In this embodiment, the diaphragm 21 includes an annular fold 211 and an annular vibration portion 212 extending from 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.

[0033] The vibration system 2 further includes an auxiliary dome 23 fixed to the inner periphery of the vibration part 212 ; the voice coil 22 is fixed to a side of the auxiliary dome 23 close to the magnetic circuit system 3 .

[0034] Specifically, the magnetic circuit system 3 is rectangular; the magnetic circuit system 3 includes a lower clamping plate 31 and a main magnet 32 ​​stacked and fixed on the lower clamping plate 31 on a side close to the vibration system 2.

[0035] In this embodiment, the lower clamping plate 31 includes a lower clamping plate body 311, four rectangular through holes 312 that pass through the lower clamping plate body 311 and are respectively located on the four sides of the main magnet 32, and four first flanges 313 that are respectively formed on the side of the four rectangular through holes 312 close to the main magnet 32 ​​and extend in the direction close to the diaphragm 21; the shape and size of each first flange 313 respectively match its corresponding rectangular through hole 312, and the four first flanges 313 are respectively spaced from the main magnet 32 ​​and together form a magnetic gap 20; 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 connects the sound cavity 10 with the outside world.

[0036] Four rectangular through holes 312 are respectively disposed in the middle areas of four sides of the lower clamping plate body 311 .

[0037] The lower clamping plate 31 also includes four second flanges 314 formed by bending and extending the edges of the lower clamping plate body 311 toward the diaphragm 21. The four second flanges 314 extend to the side of the flexible circuit board 4 away from the base frame 1 and abut against the flexible circuit board 4. The four second flanges 314 are spaced opposite the four first flanges 313 to form four locking positions 40. The base frame 1 is provided with four stoppers 11 protruding and extending toward the lower clamping plate 31 at positions corresponding to the four locking positions 40. The four stoppers 11 extend to and lock into the four locking positions 40. This design allows the rectangular through-hole 312 to be sealed by the stoppers 11 of the base frame 1.

[0038] The lower splint 31 also includes four avoidance positions 50 formed at the positions passing through its four corners respectively; the basin rack 1 is respectively provided with four support portions 12 protruding and extending in the direction close to the lower splint 31 at the positions corresponding to the four avoidance positions 50; the four support portions 12 respectively extend to the four avoidance positions 50 and are fixedly connected to the lower splint body 311.

[0039] The magnetic circuit system 3 further includes a pole core 33 stacked and fixed on a side of the main magnetic steel 32 close to the vibration system 2 .

[0040] Specifically, the loudspeaker 100 further includes four breathable isolation members 5 fixed to the lower clamping plate body 311 and respectively covering the four rectangular through holes 312 .

[0041] In this embodiment, four grooves 30 that are recessed inward and spaced apart from each other are provided on the side of the lower clamping plate body 311 away from the vibration system 2; four rectangular through holes 312 are respectively provided in the areas of the four grooves 30, and four breathable isolation members 5 are respectively fixed in the four grooves 30.

[0042] In this embodiment, the speaker 100 also includes two elastic members 8; the elastic member 8 includes a first fixed arm 41 fixed to the basin frame 1, two second fixed arms 43 respectively supported and fixed on the side of the voice coil 22 away from the diaphragm 21, and two elastic arms 42 extending from the first fixed arm 41 to the two second fixed arms 43 and forming a fixed connection.

[0043] One of the elastic members 8 serves as the flexible circuit board 4 , and the first fixing arm 41 of the elastic member 8 serving as the flexible circuit board 4 is provided with a connecting portion 44 extending in a direction away from the second fixing arm 43 .

[0044] The elastic member 8 serving as the flexible circuit board 4 is an FPC, ie, a printed circuit board, and the second fixed arm 43 thereof is electrically connected to the voice coil 22 to achieve transmission of electrical signals.

[0045] Specifically, the loudspeaker 100 further includes a cover plate 6 fixed to the basin frame 1 and enclosing the vibration system 2 to form a front cavity 60 ; the cover plate 6 is provided with a sound outlet hole 70 passing through it.

[0046] In this embodiment, there are four sound holes 70 , all of which are rectangular. The speaker 100 further includes a dust cover 7 fixed to the cover plate 6 and covering the sound holes 70 .

[0047] The speaker 100 of this embodiment embeds the flexible circuit board 4 into the bottom end of the basin frame 1, and respectively provides four rectangular through holes 312 on the four sides of the lower clamping plate body 311, and further provides four first flanges 313 extending toward the diaphragm 21 on the side of the four rectangular through holes 312 close to the main magnetic steel 32, and makes the part of the lower clamping plate body 311 located on the side of the rectangular through holes 312 away from the main magnetic steel 32 abut against the flexible circuit board 4, so that the arrangement of the four rectangular through holes 312 can meet the greater leakage requirements of the speaker 100, and can also make the flexible circuit board The wiring position of the circuit board 4 is covered to the side of the lower plywood 31 close to the basin frame 1, so that the parts of the speaker 100 do not need to be re-molded, thereby saving time and manpower to reduce costs; at the same time, the four breathable isolation members 5 are respectively fixed to the lower plywood body 311 and cover the four rectangular through holes 312. This not only allows the sound unit to be used in an environment where the sound cavity 10 is open, but also allows the leakage of the speaker 100 to be precisely adjusted and controlled by changing the damping of the breathable isolation member 5, so as to adjust the acoustic performance of the speaker 100 more conveniently and quickly to make its acoustic performance better.

[0048] 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 loudspeaker, comprising a basin frame, a vibration system, a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate, and a flexible circuit board embedded in the bottom end of the basin frame; the vibration system and the magnetic circuit system are respectively fixed to two 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; the voice coil is inserted and suspended 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 magnetic circuit system is rectangular; the lower clamping plate includes a lower clamping plate body, four rectangular through holes penetrating the lower clamping plate body and respectively located on the four sides of the main magnetic steel, and four first flanges respectively formed on one side of the four rectangular through holes close to the main magnetic steel and extending in the direction close to the diaphragm; the shape and size of each first flange respectively match the corresponding rectangular through hole, and the four first flanges are respectively spaced from the main magnetic steel and jointly form the magnetic gap; the part 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 connects the sound-generating cavity with the outside world; The speaker also includes four air-permeable isolation pieces which are fixed to the lower clamping plate body and respectively cover the four rectangular through holes.

2. The loudspeaker according to claim 1, characterized in that The four rectangular through holes are respectively arranged in the middle area of ​​the four sides of the lower clamping plate body.

3. The loudspeaker according to claim 1, characterized in that The side of the lower clamping plate body away from the vibration system is provided with four grooves which are recessed inwards and spaced apart from each other; the four rectangular through holes are respectively arranged in the areas of the four grooves, and the four air-permeable isolation members are respectively fixed in the four grooves.

4. The loudspeaker according to claim 1, characterized in that The lower clamping plate also includes four second flanges formed by the four edges of the lower clamping plate body being bent and extended in the direction of the diaphragm; the four second flanges respectively extend to the side of the flexible circuit board away from the basin frame and abut against the flexible circuit board, and the four second flanges are respectively spaced relatively from the four first flanges to form four locking positions; the positions of the basin frame corresponding to the four locking positions are respectively provided with four limiting portions protruding and extending in the direction close to the lower clamping plate; the four limiting portions respectively extend to the four locking positions and are locked in the four locking positions.

5. The loudspeaker according to claim 4, characterized in that The lower clamping plate also includes four avoidance positions formed by respectively passing through the four corners thereof; the basin frame is respectively provided with four support parts protruding and extending in the direction close to the lower clamping plate at the positions corresponding to the four avoidance positions; the four support parts respectively extend to the four avoidance positions and are fixedly connected to the lower clamping plate body.

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

7. The loudspeaker according to claim 1, characterized in that The diaphragm includes an annular fold ring and an annular vibration part formed by extending from the inner periphery of the fold ring; the outer periphery of the fold 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 also includes an auxiliary dome fixed to the inner periphery of the vibration part; 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 speaker also includes a cover plate fixed on the basin frame and surrounding the vibration system to form a front cavity; the cover plate is provided with a sound outlet hole running through it; the speaker also includes a dust cover fixed on the cover plate and covering the sound outlet hole.

10. The loudspeaker according to claim 1, characterized in that The speaker also includes two elastic members; the elastic member includes a first fixed arm fixed to the basin frame, two second fixed arms respectively supported and fixed to the side of the voice coil away from the diaphragm, and two elastic arms respectively extending from the first fixed arm to the two second fixed arms and forming a fixed connection; one of the elastic members serves as the flexible circuit board, and the first fixed arm of the elastic member serving as the flexible circuit board is provided with a connecting portion extending in a direction away from the second fixed arm.

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