CN213661927U

CN213661927U - Micro loudspeaker

Info

Publication number: CN213661927U
Application number: CN202022840014.8U
Authority: CN
Inventors: 梁平
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-07-09
Anticipated expiration: 2030-11-30
Also published as: WO2022110369A1

Abstract

The utility model provides a micro loudspeaker, it include the basin frame, accept respectively in the vibration system and the drive of basin frame the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, vibration system is including being fixed in the basin frame first vibrating diaphragm, insert and locate the magnetic gap is with the drive the voice coil loudspeaker voice coil of first vibrating diaphragm vibration. The basin frame includes a plurality of lateral walls that the interval set up and connects the fixed part of two adjacent lateral walls, the thickness of fixed part is greater than the thickness of lateral wall. This basin frame fixed part thickness of realizing novel micro loudspeaker increases the fixed area with other components to it is firm to make micro loudspeaker structure, and the product size is little, accords with frivolous requirement.

Description

Micro loudspeaker

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field especially relates to a miniature speaker.

[ background of the invention ]

With the rapid development of mobile communication technology in recent years, consumers increasingly use mobile communication devices with voice functions, such as: portable telephones, handheld game devices, portable computers, and the like. The miniature loudspeaker is used as a voice playing device, and the design of the miniature loudspeaker directly influences the voice performance of a mobile communication equipment product in the related technology. In order to meet the requirements of product thinning and high sound quality, the micro-speaker is required to be developed towards the direction of facilitating the realization of thinning and high power as much as possible.

In the related art, the micro-speaker includes a frame, a magnetic circuit and a vibration system respectively accommodated in the frame, and a lower clamp plate supporting the magnetic circuit. Magnetic circuit is including the main magnet steel that is located the middle part, vice magnet steel and the pole core around main magnet steel, and vibration system includes vibrating diaphragm and the voice coil loudspeaker voice coil of drive vibrating diaphragm vibration sound production, and the voice coil loudspeaker voice coil sets up around main magnet steel. However, the sound emission band of such a conventional speaker is narrow, and the speaker structure is not sufficiently stable.

Therefore, a new technical solution is needed to solve the above problems.

[ Utility model ] content

The utility model discloses the technical problem that needs to solve provides a miniature speaker with acoustic frequency bandwidth and structure are firm.

The utility model discloses a realize through such technical scheme: it includes the basin frame, accept respectively in the vibration system and the drive of basin frame the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, vibration system is including being fixed in the first vibrating diaphragm of basin frame, insert and locate the magnetic gap is in order to drive the voice coil loudspeaker voice coil of first vibrating diaphragm vibration, wherein, the basin frame includes a plurality of lateral walls that the interval set up and connects the fixed part of two adjacent lateral walls, the thickness of fixed part is greater than the thickness of lateral wall.

Preferably, the micro-speaker is still including being fixed in the flexure strip on the basin frame, the flexure strip with the voice coil loudspeaker voice coil electricity is connected, the flexure strip includes the substrate and a pair of first stationary blade that extends from the both ends of substrate one side, the substrate is fixed in the lateral wall of basin frame, first stationary blade is fixed in the fixed part of basin frame.

Preferably, the first diaphragm includes a first vibrating portion, a second vibrating portion located inside the first vibrating portion, a first fixing portion connected to the first vibrating portion and distant from the second vibrating portion, and a first through hole penetrating the second vibrating portion.

Preferably, the frame comprises an upper surface and an outer surface extending from the upper surface to a direction away from the diaphragm, and the first fixing portion of the first diaphragm is wrapped and fixed on the upper surface and the outer surface of the frame at the same time.

Preferably, the vibration system further includes a dome assembled on the lower surface of the first diaphragm, a support for supporting the dome, and a second diaphragm connected to one side of the support away from the first diaphragm, the elastic sheet further includes a pair of bending connection pieces extending from two ends of the other side of the substrate, and a pair of second fixing pieces connected to the bending connection pieces, and the substrate of the elastic sheet is sandwiched between the second diaphragm and the basin stand.

Preferably, the support includes a substrate having a second through hole in the center, a wall portion extending from the edge of the substrate in a direction close to the first diaphragm, and a second fixing portion extending from the wall portion, the second fixing portion is connected to the dome, and the second fixing portion of the elastic sheet is connected to the substrate of the support.

Preferably, the support further includes a connection portion extending from the substrate and disposed around the second through hole, and the voice coil is fixed to the connection portion.

The utility model discloses micro loudspeaker has following advantage: make full use of speaker inner space has full frequency band performance, and the product structure is firm.

[ description of the drawings ]

Fig. 1 is a perspective assembly view of the micro-speaker of the present invention;

fig. 2 is an exploded perspective view of the micro-speaker of the present invention;

fig. 3 is an exploded perspective view of the micro-speaker according to another angle of the present invention;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 1;

fig. 5 is a top view of the frame of the micro-speaker of the present invention;

fig. 6 is a partial combination diagram of the micro-speaker of the present invention with the bottom plate, the lower magnetic bowl, the second diaphragm and the partition plate removed.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

The micro-speaker of the utility model can be applied to portable mobile communication devices, such as mobile phones, game machines and other electronic products.

As shown in fig. 1 to 6, the micro-speaker 100 of the present invention includes a vibration system 1, a magnetic circuit system 2, and a frame 3 for respectively accommodating the vibration system 1 and the magnetic circuit system 2.

As shown in fig. 2, the vibration system 1 includes a first diaphragm 11 assembled to the frame 3, a dome 12 assembled to a lower surface of the first diaphragm 11, a support 13 supporting the dome 12, a pair of elastic pieces 14 connected to both sides of the support 13, a pair of second diaphragms 15 respectively connected to the elastic pieces 14, a voice coil 16 fixed to the support 13, and a diaphragm 17 assembled to the second diaphragms 15. The flexible plate 14 is electrically connected to the voice coil 16. The second diaphragm 15 is connected to the side of the support 13 remote from the first diaphragm 11.

The first diaphragm 11 includes a ring-shaped first vibrating portion 111, a ring-shaped second vibrating portion 112 located inside the first vibrating portion 111, a first fixing portion 113 located at an outer ring, and a first through hole 1120 extending through a middle portion of the second vibrating portion 112. In the present embodiment, the first vibrating portion 111 protrudes closer to the elastic sheet 14, and the second vibrating portion 112 protrudes away from the elastic sheet 14.

As shown in fig. 2 to 4, the bracket 13 includes a base plate 131, a second through hole 130 penetrating through the middle of the base plate 131, a wall portion 132 extending from the edge of the base plate 131 toward the first diaphragm 11, and a second fixing portion 133 extending horizontally from the upper end of the wall portion 132. The upper surface of the second fixing portion 133 is fixed to the dome 12, and both may be fixed by gluing. The wall portion 132 is provided with a plurality of through holes 1320. The bracket 13 further includes a connection portion 134 extending from the substrate 131 and disposed around the second through hole 130. The voice coil 16 is fixed to the connection portion 134 of the holder 13.

As shown in fig. 2 and 4, the elastic piece 14 includes a base piece 141, a pair of first fixing pieces 142 extending from both ends of one side of the base piece 141, a pair of bent connection pieces 143 extending from both ends of the other side of the base piece 141, and a pair of second fixing pieces 144 connecting the bent connection pieces 143. The upper surface of the second fixing piece 144 is fixed to the lower surface of the base plate 131 of the bracket 13. The substrate 141 is fixed to the second diaphragm 15. Specifically, the substrate 141 is sandwiched between the second diaphragm 15 and the frame 3. In the present embodiment, the elastic piece 14 is made of an FPC material.

The second diaphragm 15 includes a vibrating portion 151 protruding in a direction away from the first diaphragm 11, and third fixing portions 152 located on both sides of the vibrating portion 151. The third fixing portion 152 is fixed to the lower surfaces of the base plate 141 and the second fixing plate 143 of the elastic plate 14. The diaphragm 17 is assembled below the second diaphragm 15.

As shown in fig. 2 to 5, the frame 3 includes four side walls 31 that together form the receiving space 30 and four fixing portions 32 that connect two adjacent side walls 31. The frame 3 comprises an upper surface 33 and an outer surface 34 bent from the upper surface 33 and extending away from the first diaphragm 11. The thickness of the fixing portion 32 is D, and the thickness of the sidewall 31 is D, in this embodiment, the thickness D of the fixing portion 32 is greater than the thickness D of the sidewall 31. Preferably, the ratio of the thickness D of the fixing portion 32 to the thickness D of the side wall 31 is 2:1, which is more favorable for the stable connection of the elastic piece 14 and the frame 3.

The first fixing portion 113 of the first diaphragm 11 is wrapped and fixed on the upper surface 33 and the outer surface 34 of the frame 3. The first fixing piece 142 of the elastic piece 14 is fixed to the fixing portion 32 of the frame 3 since the thickness of the fixing portion 32 is greater than that of the side wall 31. Through the design, the fixing area of the first diaphragm 11, the elastic sheet 14 and the basin frame 13 can be increased, so that the structural stability is improved.

The magnetic circuit system 2 includes a lower magnetic bowl 22, a first main magnetic steel 23 assembled to the lower magnetic bowl 22, a bottom plate 4 assembled to the lower magnetic bowl 22 and disposed away from the first main magnetic steel 23, four sub magnetic steels 24 located around the first main magnetic steel 23, a first pole core 25 assembled to the first main magnetic steel 23, a second main magnetic steel 26 assembled to the first pole core 25, an upper magnetic bowl 21 assembled to the second main magnetic steel 26, and a collar 27 assembled to the upper magnetic bowl 21.

The upper magnetic bowl 21 includes a top plate 211, four side plates 212 extending from four sides of the top plate 211 in a direction away from the first diaphragm 11, and four flanges 213 horizontally extending from each side plate 212. The top plate 211 is fixed to the second main magnetic steel 26, the side plate 212 surrounds the second main magnetic steel 26 and the first pole core 25, and the four flanges 213 are fixed to the four sub magnetic steels 24, respectively. The upper surface area of the top plate 211 is smaller than or equal to the area of the first through hole 1120 of the first diaphragm 11, and the top plate 211 and a part of the side plate 212 of the upper magnetic bowl 21 extend out of the first through hole 1120. The collar 27 is sleeved on the top plate 211.

The lower magnetic bowl 22 is disc-shaped and includes a fixing plate 221 located at both sides thereof and a receiving groove 220 for receiving the first main magnetic steel 23 and the sub magnetic steel 24. The fixing plate 221 is fixed to the partition 17.

According to the design, the first main magnet 23, the second main magnet 26, the auxiliary magnet 22, the upper magnet bowl 21 and the lower magnet bowl 22 together form a magnet gap 27. The voice coil 15 is suspended in the magnetic gap 27, the voice coil 15 is electrically connected to the elastic sheet 14, and the bottom plate 4 is assembled to the lower magnetic bowl 22.

The utility model discloses micro loudspeaker 100 has adopted a plurality of vibrating diaphragms and a plurality of magnet steel to make full use of speaker inner space, thereby can increase operating band, improve acoustic performance, and through the local thickness of thickening basin frame, thereby strengthened the fixed of other components and basin frame, improved product stability.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. The utility model provides a micro loudspeaker, its include the basin frame, accept respectively in the vibration system and the drive of basin frame the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, vibration system is including being fixed in the first vibrating diaphragm of basin frame, insert and locate the magnetic gap is in order to drive the voice coil loudspeaker voice coil of first vibrating diaphragm vibration, its characterized in that: the basin frame includes a plurality of lateral walls that the interval set up and connects the fixed part of two adjacent lateral walls, the thickness of fixed part is greater than the thickness of lateral wall.

2. The micro-speaker of claim 1, wherein: the micro loudspeaker is characterized by further comprising an elastic sheet fixed on the basin frame, the elastic sheet is electrically connected with the voice coil, the elastic sheet comprises a substrate and a pair of first fixing sheets extending from two ends of one side of the substrate, the substrate is fixed on the side wall of the basin frame, and the first fixing sheets are fixed on the fixing portion of the basin frame.

3. The micro-speaker of claim 2, wherein: the first vibrating diaphragm comprises a first vibrating part, a second vibrating part positioned in the first vibrating part, a first fixing part connected with the first vibrating part and far away from the second vibrating part, and a first through hole penetrating through the second vibrating part.

4. The micro-speaker of claim 3, wherein: the basin frame comprises an upper surface and an outer surface extending from the upper surface to the direction far away from the vibrating diaphragm, and the first fixing part of the first vibrating diaphragm is simultaneously wrapped and fixed on the upper surface and the outer surface of the basin frame.

5. The micro-speaker of claim 4, wherein: the vibration system further comprises a ball top assembled on the lower surface of the first vibrating diaphragm, a support for supporting the ball top and a second vibrating diaphragm connected with one side of the support far away from the first vibrating diaphragm, the elastic sheet further comprises a pair of bending connecting sheets extending from two ends of the other side of the substrate and a pair of second fixing sheets connected with the bending connecting sheets, and the substrate of the elastic sheet is clamped between the second vibrating diaphragm and the basin frame.

6. The micro-speaker of claim 5, wherein: the support includes that the center has the base plate of second through-hole, from the base plate edge to being close to the enclosure portion that the direction of first vibrating diaphragm extends and the second fixed part that extends from enclosure portion, the second fixed part with the ball top links to each other, the second stationary blade of flexure strip with the base plate of support links to each other.

7. The micro-speaker of claim 6, wherein: the support also includes the connecting portion that extends and set up around the second through-hole from the base plate, the voice coil loudspeaker voice coil is fixed in connecting portion.