Loudspeaker unit

Abstract

The present utility model provides a loudspeaker unit, comprising a basket, and a vibration system and a magnetic circuit system which are fixed to the basket. The magnetic circuit system comprises a bottom plate, main magnetic steel fixed to the upper surface of the bottom plate, and annular auxiliary magnetic steel arranged around the main magnetic steel to form a magnetic gap; the bottom plate is further provided with a lower surface opposite to the upper surface; the bottom plate is provided with a leakage channel which is recessed from the upper surface to the lower surface but does not penetrate through the lower surface and is communicated with the magnetic gap and the outer side of the annular auxiliary magnetic steel. The provision of the leakage channel can effectively balance the sound pressure inside and outside the loudspeaker unit, improve the acoustic performance of the loudspeaker unit, and is also beneficial to heat dissipation of a voice coil.

Description

Speaker unit Technical Field

[0001] The utility model relates to the technical field of acoustics and electricity, in particular to a loudspeaker unit. 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 speaker units used in them are getting higher and higher.

[0003] In the related art, the speaker unit includes a vibration system and a magnetic circuit system. The vibration system includes a voice coil. The magnetic circuit system includes a lower clamping plate, a main magnet fixed to the lower clamping plate, and an annular auxiliary magnet arranged around the main magnet to form a magnetic gap. Generally, the annular auxiliary magnet will cause the air under the voice coil to be unable to leak effectively, thereby affecting the heat dissipation of the voice coil and even having an adverse effect on the acoustic performance of the speaker.

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

[0005] The purpose of the utility model is to provide a loudspeaker unit, which solves the problem of heat dissipation of the voice coil and improves the acoustic performance of the loudspeaker unit when using an annular auxiliary magnetic steel. Technical Solutions

[0006] In order to achieve the above-mentioned purpose, the utility model provides a speaker unit, which includes a basin frame and a vibration system and a magnetic circuit system fixed to the basin frame, the magnetic circuit system includes a lower clamping plate, a main magnet fixed to the upper surface of the lower clamping plate, and an annular secondary magnet arranged around the main magnet to form a magnetic gap, the lower clamping plate is also provided with a lower surface arranged opposite to the upper surface, and the lower clamping plate is provided with a leakage channel connected to the magnetic gap and the outside of the annular secondary magnet, which is recessed from the upper surface to the lower surface but does not penetrate the lower surface.

[0007] Preferably, the lower splint includes two opposite first long sides, a second long side perpendicular to the two first long sides, and a corner portion connecting the first long sides and the second long sides, and the leakage channel is located at least one of the corner portion, the first long side, and the second long side.

[0008] Preferably, the vibration system includes a diaphragm fixed on a basin frame, an elastic support member arranged opposite to the diaphragm, and a voice coil driving the diaphragm to vibrate and produce sound, the diaphragm includes a dome and a folding ring surrounding the dome, the dome includes a main body and an extension portion bent and extended from the edge of the main body toward the magnetic circuit system, the elastic support member is fixed between the extension portion and the basin frame, and the voice coil is fixed to the main body.

[0009] Preferably, the folding ring includes a bending portion, an internal fixing portion extending from the inner side of the bending portion, and an external fixing portion extending from the outer side of the bending portion, the internal fixing portion is fixed to the main body portion, the external fixing portion is fixed to the basin frame, and the external fixing portion is arranged on three surfaces of the basin frame.

[0010] Preferably, the folding ring, the ball top and the basin frame are integrally formed.

[0011] Preferably, the magnetic circuit system also includes a main pole core and an annular secondary pole core respectively attached to the main magnet and the annular secondary magnet, the elastic support member includes a first part extending along the inner side of the extension portion and a second part extending from the first part in a direction away from the extension portion, the second part is fixed to the main body, and a avoidance portion for avoiding the second part is provided at a position relative to the annular secondary pole core and the second part.

[0012] Preferably, the speaker unit further includes a mesh, the mesh including a fixing portion fixed to the edge of the lower splint, a side wall extending from the fixing portion bent toward the vibration system, and an end of the side wall fixed to the lower surface of the basin frame. Beneficial effects

[0013] The speaker unit of the present invention includes a frame, a vibration system, and a magnetic circuit system fixed to the frame. The magnetic circuit system includes a lower clamping plate, a main magnet fixed to the upper surface of the lower clamping plate, and an annular secondary magnet disposed around the main magnet to form a magnetic gap. The lower clamping plate also has a lower surface disposed opposite the upper surface. The lower clamping plate is provided with a leakage channel that is recessed from the upper surface to the lower surface but does not penetrate the lower surface, connecting the magnetic gap and the outer side of the annular secondary magnet. In this structure, the provision of the leakage channel not only effectively balances the sound pressure inside and outside the speaker, improving the acoustic performance of the speaker unit, but also accelerates air circulation, facilitating heat dissipation from the voice coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 in the field of the present invention, other drawings can be obtained based on these drawings without creative work. Among them:

[0015] FIG1 is a perspective view of a speaker unit of the present invention;

[0016] FIG2 is a cross-sectional view of the speaker unit of the present invention along line AA of FIG1 ;

[0017] FIG3 is an exploded view of a speaker unit of the present invention;

[0018] FIG4 is a perspective view of the lower clamping plate 31 when the leakage channel 31a is located at the corner portion;

[0019] FIG5 is a perspective view of the lower clamping plate 31 when the leakage channel 31a is located at the second long side; Modes for Carrying Out the Invention

[0020] The following will be combined with the 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 the field of the present invention without making creative efforts are within the scope of protection of the present invention.

[0021] 1-5 , the present invention provides a speaker unit 100 , which includes a frame 1 , and a vibration system 2 and a magnetic circuit system 3 fixed to the frame.

[0022] The vibration system 2 includes a diaphragm 21 fixed on the basin frame 1, an elastic support member 22 arranged opposite to the diaphragm 21, and a voice coil 23 that drives the diaphragm 21 to vibrate and produce sound. The diaphragm 21 includes a dome 211 and a folding ring 212 surrounding the dome 211. The dome 211 includes a main body 211a and an extension portion 211b that bends and extends from the edge of the main body 211a toward the magnetic circuit system 3. The elastic support member 22 is fixed between the extension portion 211b and the basin frame 1. The voice coil 23 is fixed to the main body 211a. After power is turned on, the voice coil 23 will drive the diaphragm 21 to vibrate up and down under the action of the magnetic circuit system 3.

[0023] Furthermore, the folding ring 212 includes a bending portion 212a, an inner fixing portion 212b extending from the inner side of the bending portion 212a, and an outer fixing portion 212c extending from the outer side of the bending portion 212a. The inner fixing portion 212b is fixed to the main body 211a, and the outer fixing portion 212c is fixed to the basin frame 1 and is arranged on three surfaces of the basin frame 1.

[0024] Furthermore, the folding ring 212, the dome 211 and the basin frame 1 are integrally formed.

[0025] The magnetic circuit system 3 comprises a lower clamping plate 31, a main magnet 32 ​​fixed to the upper surface 311 of the lower clamping plate 31, and an annular secondary magnet 33 surrounding the main magnet 32 ​​to form a magnetic gap. The lower clamping plate 31 also has a lower surface 312 opposite the upper surface 311. The lower clamping plate 31 is provided with a magnetic gap that extends from the upper surface 311 to the lower surface 312 but does not extend through the lower surface 312. A leakage channel 31a is also provided on the outside of the annular secondary magnet 33. The provision of the leakage channel 31a not only effectively balances the sound pressure inside and outside the speaker, thereby improving the acoustic performance of the speaker unit, but also facilitates heat dissipation from the voice coil 23.

[0026] The lower clamping plate 31 includes two opposing first long sides 313, a second long side 314 perpendicular to the two first long sides 313, and a corner portion 315 connecting the first and second long sides 313 and 314. The leakage channel 31a is located at at least one of the corner portion 315, the first long side 313, and the second long side 314.

[0027] As shown in Figure 2-3, the leakage channel 31a is set at the first long side 313; of course, the leakage channel 31a can be set at the corner portion or the second long side. As shown in Figure 4, the leakage channel 31a can be set at the corner portion 315 of the lower clamping plate 31; as shown in Figure 5, the leakage channel 31a is set at the second long side 314 of the lower clamping plate 31.

[0028] The magnetic circuit system 3 also includes a main pole core 321 and an annular secondary pole core 331 respectively attached to the main magnet 32 ​​and the annular secondary magnet 33. The elastic support member 22 includes a first portion 221 extending along the inner side of the extension portion 211b of the spherical top 21 and a second portion 222 extending from the first portion 221 in a direction away from the extension portion 211b. The second portion 222 is fixed to the main body 211a. A avoidance portion 332 for avoiding the second portion is provided at a position opposite to the annular secondary pole core 331 and the second portion 222.

[0029] The speaker unit further includes a mesh 4 , which includes a fixing portion 41 fixed to the edge of the lower clamping plate 31 , a side wall 42 extending from the fixing portion 41 toward the vibration system 2 , and an end of the side wall 42 fixed to the lower surface of the basin frame 1 .

[0030] Compared with the related art, in the above structure, the opening of the leakage channel 31 a not only effectively balances the sound pressure inside and outside the speaker to improve the acoustic performance of the speaker unit, but also facilitates the heat dissipation of the voice coil 23 .

[0031] The above is only an implementation method of the present invention. It should be pointed out that for ordinary technicians in the field of the present invention, improvements can be made without departing from the creative concept of the present invention, but these all fall within the scope of protection of the present invention.

Claims

1. A loudspeaker unit, which comprises a chassis, a vibration system and a magnetic circuit system fixed to the chassis. The magnetic circuit system includes a lower yoke, a main magnet fixed to the upper surface of the lower yoke, and an annular auxiliary magnet arranged around the main magnet to form a magnetic gap. The lower yoke further has a lower surface opposite to the upper surface. Characterized in that, the lower yoke is provided with a leakage channel that depresses from the upper surface to the lower surface but does not penetrate the lower surface, and communicates the magnetic gap and the outside of the annular auxiliary magnet.

2. The loudspeaker unit according to claim 1, Characterized in that: the lower yoke includes two opposite first long sides, a second long side perpendicular to the two first long sides, and a corner portion connecting the first long sides and the second long side. The leakage channel is located in at least one of the corner portion, the first long side, and the second long side.

3. The loudspeaker unit according to claim 1, Characterized in that: the vibration system includes a diaphragm fixed to the chassis, an elastic support member arranged opposite to the diaphragm, and a voice coil for driving the diaphragm to vibrate and generate sound. The diaphragm includes a dome and a surround surrounding the dome. The dome includes a main body portion and an extension portion bent and extending from the edge of the main body portion toward the magnetic circuit system. The elastic support member is fixed between the extension portion and the chassis, and the voice coil is fixed to the main body portion.

4. The loudspeaker unit according to claim 3, Characterized in that: the surround includes a bent portion, an inner fixing portion extending from the inner side of the bent portion, and an outer fixing portion extending from the outer side of the bent portion. The inner fixing portion is fixed to the main body portion, the outer fixing portion is fixed to the chassis, and the outer fixing portion is arranged on three surfaces of the chassis.

5. The loudspeaker unit according to claim 4, Characterized in that: the surround, the dome and the chassis are integrally formed.

6. The loudspeaker unit according to claim 3, Characterized in that: the magnetic circuit system further includes a main pole core and an annular auxiliary pole core respectively attached to the main magnet and the annular auxiliary magnet. The elastic support member includes a first portion extending along the inner side of the extension portion and a second portion extending from the first portion in a direction away from the extension portion. The second portion is fixed to the main body portion, and an avoidance portion for avoiding the second portion is arranged at a position of the annular auxiliary pole core opposite to the second portion.

7. The loudspeaker unit according to claim 1, Characterized in that: the loudspeaker unit further includes a grille. The grille includes a fixing portion fixed to the edge of the lower yoke, a side wall bent and extending from the fixing portion toward the vibration system, and the end of the side wall is fixed to the lower surface of the chassis.

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