Loudspeaker

Abstract

The present invention provides a loudspeaker. The loudspeaker comprises a basket, a vibration system fixed to the basket, and a magnetic circuit system for driving the vibration system to vibrate; the vibration system comprises a diaphragm fixed to the basket, a voice coil for driving the diaphragm to vibrate, and a framework connected to the diaphragm and the voice coil; the framework comprises a flat portion fixed to the diaphragm, and a first extension portion extending from the inner edge of the flat portion to a direction away from the diaphragm; the first extension portion comprises a first portion which is bent and extends from the flat portion to a direction away from the diaphragm, and a second portion which is bent and extends from the first portion to a direction away from the flat portion; the voice coil is fixedly connected to the second portion; and at least part of the first extension portion further comprises a third portion which is bent and extends from the second portion to a direction away from the voice coil. The loudspeaker provided by the present invention can improve the stability of the loudspeaker and prolong the service life of the loudspeaker.

Description

speaker Technical Field

[0001] The present invention relates to the field of acoustic and electrical technology, and in particular to a loudspeaker. Background Art

[0002] With the development of science and technology, portable electronic products such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices are widely used in people's daily lives. In these mobile electronic devices, voice playback devices are indispensable components. The quality of voice directly affects the user experience when using these mobile electronic devices. Therefore, the requirements for the speakers used in them are getting higher and higher.

[0003] The loudspeaker of the related technology includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system that drives the vibration system to vibrate. The vibration system includes a diaphragm fixed to the basin frame, a voice coil that drives the diaphragm to vibrate, and a skeleton connecting the diaphragm and the voice coil. The edges of the part where the skeleton and the voice coil are fixedly connected often have relatively sharp edges or burrs. When the vibration system vibrates, the stress on the voice coil wire close to the skeleton part, especially the R corner area, is relatively concentrated, which can easily cause damage to the insulation layer of the voice coil wire or even the center copper wire, thereby causing abnormal resistance of the speaker and a short circuit.

[0004] Therefore, it is necessary to provide a product that solves the above problems. Technical issues

[0005] An object of the present invention is to provide a loudspeaker to reduce the risk of short circuit of the loudspeaker due to local damage of the voice coil wire, thereby reducing the failure rate and extending the service life. Technical Solutions

[0006] In order to achieve the above-mentioned objectives, an embodiment of the present invention provides a loudspeaker, comprising a basket, a vibration system fixed to the basket, and a magnetic circuit system for driving the vibration system to vibrate, the vibration system comprising a diaphragm fixed to the basket, a voice coil for driving the diaphragm to vibrate, and a skeleton connecting the diaphragm and the voice coil, the skeleton comprising a flat plate portion fixed to the diaphragm, a first extending portion extending from an inner edge of the flat plate portion away from the diaphragm, the first extending portion comprising a first portion bent and extending from the flat plate portion away from the diaphragm, and a second portion bent and extending from the first portion away from the flat plate portion, the voice coil being fixedly connected to the second portion, and at least part of the first extending portion further comprising a third portion bent and extending from the second portion away from the voice coil.

[0007] Preferably, the first extension portion includes two relatively arranged long axis sides, two relatively arranged short axis sides and four R corner areas connecting the long axis sides and the short axis sides, and the third part is arranged at at least one of the long axis sides, the short axis sides and the R corner areas.

[0008] Preferably, the magnetic circuit system includes a lower clamping plate, a main magnetic assembly fixed to the lower clamping plate, and a secondary magnetic assembly surrounding the main magnetic assembly to form a magnetic gap, the voice coil is at least partially inserted in the magnetic gap, the main magnetic assembly includes a first main magnet, a main pole core and a second main magnet stacked in sequence from the lower clamping plate, the secondary magnetic assembly includes a secondary magnet fixed to the lower clamping plate and a secondary pole core attached to the secondary magnet, and the secondary pole core is fixed to the basin frame.

[0009] Preferably, the vibration system also includes a flexible circuit board spaced apart from the diaphragm, the skeleton also includes a second extension portion extending from the outer edge of the flat plate portion in a direction away from the diaphragm, the voice coil includes a voice coil lead electrically connected to the flexible circuit board, the flexible circuit board includes a main body portion, an electrical connection portion bent outward from the outer end of the main body portion, and a lead connection portion bent from the inner end of the main body portion toward the flat plate portion. The main body portion is fixedly connected to the second extension portion, the lead connection portion is fixed to the flat plate portion, and the lead connection portion is electrically connected to the voice coil through the voice coil lead.

[0010] Preferably, at least one of the long axis side and the short axis side is provided with a notch for avoiding the voice coil lead.

[0011] Preferably, one end of the secondary pole core close to the electrical connection portion is further provided with a lead groove for avoiding the voice coil lead.

[0012] Preferably, the diaphragm includes an inner fold ring, an outer fold ring arranged outside the inner fold ring, and a spherical top portion connecting the inner fold ring and the outer fold ring and covering the flat plate portion, the inner fold ring is fixed to the main magnetic assembly, the outer fold ring is fixed to the basin frame, and the spherical top portion is glued to the flat plate portion.

[0013] Preferably, the flat plate portion has a bonding surface bonded to the top of the ball, and the bonding surface is recessed along the vibration direction of the diaphragm to form a strip-shaped glue storage groove, and the number of the glue storage grooves is two and they are respectively located on both sides of the inner fold ring.

[0014] Preferably, the lower clamping plate is further provided with an avoidance groove for avoiding the voice coil. Beneficial effects

[0015] The novel loudspeaker of the present invention comprises a frame, a vibration system fixed to the frame, and a magnetic circuit system that drives the vibration system. The vibration system comprises a diaphragm fixed to the frame, a voice coil that drives the diaphragm to vibrate, and a frame connecting the diaphragm and the voice coil. The frame comprises a flat plate portion fixed to the diaphragm, a first extension portion extending from the inner edge of the flat plate portion away from the diaphragm, the first extension portion comprising a first portion that bends and extends from the flat plate portion away from the diaphragm, and a second portion that bends and extends from the first portion away from the flat plate portion. The voice coil is fixedly connected to the second portion, and at least part of the first extension portion further comprises a third portion that bends and extends from the second portion away from the voice coil. In this structure, by bending and extending the third portion away from the second portion that is fixedly connected to the voice coil, sharp right angles and burrs are eliminated at the contact point between the frame and the voice coil, reducing the risk of short circuits caused by localized damage to the voice coil wire, lowering the failure rate, and extending the service life of the loudspeaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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. Those skilled in the art in the art can also derive other drawings based on these drawings without inventive work. Among them:

[0017] FIG1 is a perspective view of a loudspeaker according to the present invention;

[0018] FIG2 is an exploded view of the speaker of the present invention;

[0019] FIG3 is a sectional perspective view of the speaker of the present invention taken along line AA in FIG1 ;

[0020] FIG4 is a partial enlarged view of portion B in FIG3 ;

[0021] FIG5 is a perspective view of the third portion of the speaker frame of the present invention, which is arranged at the long axis side, the short axis side and the R corner area;

[0022] FIG6 is a partial enlarged view of portion C in FIG5 ;

[0023] FIG7 is a perspective view of the speaker frame of the present invention, in which the third portion is disposed only in the R corner area;

[0024] FIG8 is a partial enlarged view of portion D in FIG7 ;

[0025] FIG9 is a diagram showing the assembly of the voice coil, bobbin, and auxiliary pole core of the speaker of the present invention;

[0026] Reference numerals:

[0027] 100. Speaker;

[0028] 1. Basin rack;

[0029] 2. Vibration system; 21. Diaphragm; 211. Inner fold; 212. Outer fold; 213. Dome; 22. Voice coil; 221. Voice coil leads; 23. Frame; 231. Flat plate; 2311. Gluing surface; 2312. Glue reservoir; 232. First extension; 2321. First portion; 2322. Second portion; 2323. Third portion; 2324. Major axis; 2325. Minor axis; 2326. Rounded corner area; 2327. Notch; 233. Second extension; 24. Flexible printed circuit board; 241. Main body; 242. Electrical connection; 243. Lead connection.

[0030] 3. Magnetic circuit system; 31. Lower clamping plate; 311. Avoidance groove; 32. Main magnetic assembly; 321. First main magnet; 322. Main pole core; 323. Second main magnet; 33. Magnetic gap; 34. Auxiliary magnetic assembly; 341. Auxiliary magnet; 342. Auxiliary pole core; 3421. Lead groove. Modes for Carrying Out the Invention

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 the field of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0032] As shown in Figures 1-4, the present invention provides a loudspeaker 100, including a basin frame 1, a vibration system 2 fixed to the basin frame 1, and a magnetic circuit system 3 that drives the vibration system 2 to vibrate. The vibration system 2 includes a diaphragm 21 fixed to the basin frame 1, a voice coil 22 that drives the diaphragm 21 to vibrate, and a skeleton 23 connecting the diaphragm 21 and the voice coil 22. The skeleton 23 includes a flat plate portion 231 fixed to the diaphragm 21, a first extension portion 232 extending from the inner edge of the flat plate portion 231 away from the diaphragm 21, and a second extension portion 233 extending from the outer edge of the flat plate portion 231 away from the diaphragm 21. The first extension portion 232 includes a first portion 2321 that bends and extends from the flat plate portion 231 away from the diaphragm 21, and a second portion 2322 that bends and extends from the first portion 2321 away from the flat plate portion 231. The voice coil 22 is fixedly connected to the second portion 2322. At least part of the first extension portion 232 also includes a third portion 2323 that bends and extends from the second portion 2322 away from the voice coil 22.

[0033] As shown in Figures 5-8, the first extension portion 232 includes two relatively arranged long axis sides 2324, two relatively arranged short axis sides 2325 and four R-angle areas 2326 connecting the long axis sides 2324 and the short axis sides 2325. The third part 2323 is arranged at least one of the long axis sides 2324, the short axis sides 2325 and the R-angle areas 2326. As shown in Figures 5-6, the third part 2323 can be arranged at the long axis sides 2324, the short axis sides 2325 and the R-angle areas 2326. Of course, in order to reduce material consumption and reduce the weight of the skeleton, the third part can also be added in any vulnerable area in a targeted manner. As shown in Figures 7-8, the third part 2323 can be set only in the vulnerable R-angle area 2326.

[0034] By adding a third part 2323 to the long axis side 2324, the short axis side 2325 and the R corner area 2326, or only in the easily damaged R corner area 2326, the sharp corners and burrs in the part of the skeleton 23 fixedly connected to the voice coil 22 can be eliminated. That is, when the voice coil 22 drives the skeleton 23 to vibrate, the voice coil wire at the connection with the skeleton 23 is evenly stressed, avoiding the situation where part of the voice coil wire is damaged due to stress concentration, thereby reducing the risk of short circuit of the speaker, reducing the failure rate and extending the service life of the speaker.

[0035] Furthermore, the diaphragm 21 includes an inner fold ring 211, an outer fold ring 212 arranged outside the inner fold ring 211, and a spherical top portion 213 connecting the inner fold ring 211 and the outer fold ring 212 and covering the flat portion 231. The outer fold ring 212 is fixed to the basin frame 1, and the spherical top portion 213 is glued to the flat portion 231.

[0036] As shown in Figures 5-8, the flat plate portion 231 has a gluing surface 2311 that is glued to the dome portion 213. The gluing surface 2311 is recessed along the vibration direction of the diaphragm 21 to form a strip-shaped glue storage groove 2312. There are two glue storage grooves 2312, which are respectively located on both sides of the inner folding ring 211. When the skeleton 23 and the diaphragm 21 are glued and fixed, the setting of the glue storage groove 2312 can, on the one hand, improve the strength of the skeleton 23 and ensure the stability of vibration. On the other hand, it can make the gluing of the skeleton 23 and the diaphragm 21 more stable, and at the same time effectively prevent the glue from overflowing to other parts on both sides, thereby affecting the assembly of the speaker.

[0037] Furthermore, the vibration system 2 also includes a flexible circuit board 24 spaced apart from the diaphragm 21. The voice coil 22 includes a voice coil lead 221 electrically connected to the flexible circuit board 24. The flexible circuit board 24 includes a main body 241, an electrical connection portion 242 bent outward from the outer end of the main body 241, and a lead connection portion 243 bent from the inner end of the main body toward the flat plate portion 231. The main body 241 is fixedly connected to the second extension portion 233 of the skeleton 23. The lead connection portion 243 is fixed to the flat plate portion 231. The voice coil 22 is electrically connected to the lead connection portion 243 via the voice coil lead 221. The provision of the flexible circuit board 24 can effectively suppress lateral swing of the voice coil 22, thereby improving the reliability and stability of the speaker 100.

[0038] Furthermore, as shown in FIG. 2 , at least one of the long axis side 2324 and the short axis side 2325 is provided with a notch 2327 for avoiding the voice coil lead 221 .

[0039] Furthermore, as shown in FIG2-3, the magnetic circuit system 3 includes a lower clamping plate 31, a main magnetic assembly 32 fixed to the lower clamping plate 31, and an auxiliary magnetic assembly 34 arranged around the main magnetic assembly 32 to form a magnetic gap 33. The inner fold 211 of the diaphragm 21 is fixed to the main magnetic assembly 32. The lower clamping plate 31 is provided with a avoidance groove 311 for avoiding the voice coil 22. The main magnetic assembly 32 includes a first main magnetic steel 321, a main pole core 322, and a second main magnetic steel 323 stacked in sequence from the lower clamping plate 31; the auxiliary magnetic assembly 34 includes a first main magnetic steel 321, a main pole core 322, and a second main magnetic steel 323 fixed to the lower clamping plate 31. The auxiliary magnet 341 and the auxiliary pole core 342 attached to the auxiliary magnet 341, the auxiliary pole core 342 is fixed to the basin frame 1 and the end of the auxiliary pole core 342 close to the electrical connection part 242 is also provided with a lead groove 3421 for avoiding the voice coil lead 221, the voice coil 22 is fixed to the second part 2322 of the skeleton 23 and inserted into the magnetic gap 33; and the voice coil 22 is electrically connected to the flexible circuit board 24 through the voice coil lead 221. After power is turned on, the voice coil 22 interacts with the magnetic circuit system 3, driving the skeleton 23 and the diaphragm 21 to vibrate and make sound.

[0040] Compared with the related art, the third part 2323 is bent and extended from the second part 2322 fixedly connected to the voice coil 22 in the direction away from the voice coil 22, thereby eliminating the sharp corners and burrs in the part of the skeleton 23 fixedly connected to the voice coil 22. When the voice coil 22 drives the skeleton 23 to vibrate, the voice coil wire at the connection with the skeleton 23 is evenly stressed, avoiding the situation where part of the voice coil wire is damaged due to stress concentration, thereby reducing the risk of short circuit of the speaker, reducing the failure rate and extending the service life of the speaker.

[0041] The above description is merely an embodiment of the present invention. It should be pointed out that a person skilled in the art in the field of the present invention may make improvements without departing from the inventive concept of the present invention, but these improvements shall all fall within the scope of protection of the present invention.

Claims

1. A loudspeaker comprising a basket, a vibration system fixed to the basket, and a magnetic circuit system for driving the vibration system to vibrate, the vibration system comprising a diaphragm fixed to the basket, a voice coil for driving the diaphragm to vibrate, and a skeleton connecting the diaphragm and the voice coil, the skeleton comprising a flat plate portion fixed to the diaphragm, a first extension portion extending from an inner edge of the flat plate portion in a direction away from the diaphragm, the first extension portion comprising a first portion extending from the flat plate portion in a direction away from the diaphragm and a second portion extending from the first portion in a direction away from the flat plate portion, the voice coil being fixedly connected to the second portion, characterized in that: At least part of the first extension portion further includes a third portion that bends and extends from the second portion in a direction away from the voice coil.

2. The loudspeaker according to claim 1, wherein: The first extension portion includes two oppositely arranged long axis sides, two oppositely arranged short axis sides and four R corner areas connecting the long axis sides and the short axis sides, and the third portion is arranged at at least one of the long axis sides, the short axis sides and the R corner areas.

3. The loudspeaker according to claim 2, wherein: The magnetic circuit system includes a lower clamping plate, a main magnetic assembly fixed to the lower clamping plate, and a secondary magnetic assembly surrounding the main magnetic assembly to form a magnetic gap. The voice coil is at least partially inserted in the magnetic gap. The main magnetic assembly includes a first main magnet, a main pole core, and a second main magnet stacked in sequence from the lower clamping plate. The secondary magnetic assembly includes a secondary magnet fixed to the lower clamping plate and a secondary pole core attached to the secondary magnet. The secondary pole core is fixed to the basin frame.

4. The loudspeaker according to claim 3, wherein: The vibration system also includes a flexible circuit board spaced apart from the diaphragm, the skeleton also includes a second extension portion extending from the outer edge of the flat portion in a direction away from the diaphragm, the voice coil includes a voice coil lead electrically connected to the flexible circuit board, the flexible circuit board includes a main body, an electrical connection portion bent outwardly from the outer end of the main body, and a lead connection portion bent from the inner end of the main body toward the flat portion. The main body is fixedly connected to the second extension portion, the lead connection portion is fixed to the flat portion, and the lead connection portion is electrically connected to the voice coil through the voice coil lead.

5. The loudspeaker according to claim 4, characterized in that: At least one of the long axis side and the short axis side is provided with a notch for avoiding the voice coil lead.

6. The loudspeaker according to claim 4, wherein: One end of the secondary pole core close to the electrical connection portion is further provided with a lead groove for circumventing the voice coil lead.

7. The loudspeaker according to claim 3, wherein: The diaphragm includes an inner fold ring, an outer fold ring arranged outside the inner fold ring, and a spherical top portion connecting the inner fold ring and the outer fold ring and covering the flat plate portion. The inner fold ring is fixed to the main magnetic assembly, the outer fold ring is fixed to the basin frame, and the spherical top portion is glued to the flat plate portion.

8. The loudspeaker according to claim 7, wherein: The flat plate portion has a bonding surface bonded to the top of the ball. The bonding surface is recessed along the vibration direction of the diaphragm to form a strip-shaped glue storage groove. There are two glue storage grooves, which are respectively located on both sides of the inner folding ring.

9. The loudspeaker according to claim 7, wherein: The lower clamping plate is further provided with an avoidance groove for avoiding the voice coil.

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