CN111436015A

CN111436015A - Sound production device

Info

Publication number: CN111436015A
Application number: CN201911393318.XA
Authority: CN
Inventors: 宋威; 邵涛; 陶伟伟
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-07-21

Abstract

The application provides a sounding device, include the basin frame and be fixed in magnetic circuit and vibration system on the basin frame, a serial communication port, the basin frame includes the basin frame main part and certainly the basin frame main part to the boss that magnetic circuit extends, magnetic circuit is fixed in the boss, be equipped with a plurality of edges on the boss vibration system vibration direction runs through the first through-hole of boss.

Description

Sound production device

Technical Field

The application belongs to the electroacoustic conversion field, especially relates to a sounding device.

Background

Present sound production device generally includes the basin frame, and is fixed in respectively magnetic circuit system and vibration system on the basin frame, vibration system is including the last vibrating diaphragm that is located basin frame upside and the lower vibrating diaphragm that is located basin frame downside, magnetic circuit is located between vibrating diaphragm and the lower vibrating diaphragm, the downside space of lower vibrating diaphragm, and two spaces in space between lower vibrating diaphragm and the last vibrating diaphragm are cut apart by lower vibrating diaphragm, at vibration sound production in-process, the pressure difference value can appear too big between these two spaces, reveal inadequately, lead to product Q value, SP L etc. are not up to standard.

Content of application

An object of the application is to provide a sound production device, it is too big to aim at solving the pressure difference value that can appear between these two spaces of lower space of lower vibrating diaphragm and space between lower vibrating diaphragm and the last vibrating diaphragm in the sound production device of prior art, reveals inadequately, leads to the problem that product Q value, SP L etc. are not up to standard.

For solving above-mentioned technical problem, this application is realized like this, a sound production device, include the basin frame and be fixed in magnetic circuit and vibration system on the basin frame, the basin frame includes the basin frame main part and certainly the basin frame main part to the boss that magnetic circuit extends, magnetic circuit is fixed in the boss, be equipped with a plurality of edges on the boss vibration system vibration direction runs through the first through-hole of boss.

Furthermore, the magnetic circuit system comprises magnetic steel and a magnetic bowl, the magnetic bowl comprises a first side wall and a bottom wall, the first side wall is arranged oppositely, the bottom wall is connected with the first side wall, and the magnetic steel is arranged on the bottom wall and is arranged at intervals with the first side wall to form a first magnetic gap; the first side wall is connected with the boss of the basin frame.

Furthermore, a groove is formed in the side face, facing the magnetic circuit system, of the boss, and the groove penetrates through the boss along the vibration direction of the vibration system.

Furthermore, a notch is arranged at the corner of the first side wall, which is far away from the bottom wall, a bulge matched with the notch is convexly extended towards the vibration direction of the vibration system by the boss, and the first side wall is connected with the boss of the basin stand through the notch-bulge structure.

Further, the vibration system is including being fixed in basin frame main part downside lower vibrating diaphragm, setting are in basin frame main part with flexible circuit board between the lower vibrating diaphragm, insert and locate the voice coil loudspeaker voice coil in first magnetic gap, be located the voice coil loudspeaker voice coil upside support in voice coil loudspeaker voice coil skeleton on the flexible circuit board, be equipped with fretwork portion and be fixed in the last vibrating diaphragm of basin frame main part upside, and cover the ball top of fretwork portion.

Further, the voice coil framework comprises an annular supporting part and supporting walls oppositely arranged on two sides of the annular supporting part; the annular supporting part is abutted against the voice coil, and the supporting wall is abutted against the flexible circuit board.

Furthermore, a plurality of second through holes are formed in the annular supporting portion, and the second through holes are perpendicular to the first through holes.

Furthermore, the upper diaphragm comprises a first annular folded edge, a second annular folded edge located in the ring shape of the first annular folded edge, and an arc surface connecting the first annular folded edge and the second annular folded edge, wherein the arc surface protrudes towards the direction of the dome, and the dome is connected to the second annular folded edge.

Compared with the prior art, the sound production device has the advantages that in the vibration sound production process of the vibration system of the sound production device, air flows can flow to the space below through the first through hole in the basin frame, air pressure difference of the space above and below the basin frame is reduced, accordingly, tone quality and stereo effect are improved, Q value, SP L and other performances of the sound production device are improved, air flow sound is improved, and hearing of products is improved.

Drawings

Fig. 1 is a perspective view of an embodiment of a sound device according to the present application.

Fig. 2 is an exploded view of fig. 1.

FIG. 3 is a block diagram of one embodiment of a frame of the present application.

Fig. 4 is a top view of an embodiment of a magnetic circuit system of the present application.

Fig. 5 is a schematic assembly view (cross-sectional view along line a-a of fig. 1) of the present application of the frame and magnetic bowl.

FIG. 6 is an internal assembly view of an embodiment of the sound device of the present application (cross-sectional view taken along line B-B of FIG. 1).

Fig. 7 is an enlarged view of a portion C in fig. 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only used for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The sound production device provided by the application is characterized in that a perspective view and an explosion view of an embodiment are respectively shown in fig. 1 and fig. 2, the sound production device comprises a basin frame 1, a magnetic circuit system 2 and a vibration system 3 which are fixed on the basin frame, the basin frame 1 comprises a basin frame main body 11 and bosses 12 which extend from the basin frame main body 11 to the magnetic circuit system 2 (namely to the center of the basin frame) as shown in fig. 3, and in the figure, the bosses 12 are relatively arranged on two long sides of the basin frame main body 11 and can also be relatively arranged on short sides, and the invention is not limited. The magnetic circuit system 2 is fixed on the boss 12, and the boss 12 is provided with a plurality of first through holes 121 which penetrate through the boss along the vibration direction (Z direction) of the vibration system 3.

In the sound production device of the embodiment and the vibration system, the air flow can flow through the space below the first through hole 121 on the basin frame 1 in the vibration sound production process, the air pressure difference of the upper space and the lower space of the basin frame 1 is reduced, the tone quality and the stereo effect are improved, the Q value of the sound production device, the SP L performance and the like are improved, the airflow sound is improved, and the auditory sense of a product is improved.

Further, as shown in fig. 2 and 4, the magnetic circuit system 2 includes a magnetic steel 21 and a magnetic bowl 22, and preferably, may further include a pole core 23 stacked on the magnetic steel, so as to improve the utilization rate of the magnetic field. The magnetic bowl 22 comprises a first side wall 221 arranged oppositely and a bottom wall 222 connected with the first side wall 221, the magnetic steel 21 is arranged on the bottom wall 222, and a first magnetic gap 223 is formed between the magnetic steel and the first side wall 221 at an interval; preferably, the magnetic bowl 22 may further include a second side wall 225 oppositely disposed and adjacent to the first side wall 221, as shown in fig. 2 and 4, the second side wall 225 is spaced from the magnetic steel 21 to form a second magnetic gap 226. Preferably, a gap is formed at the intersection of the second sidewall 225 and the first sidewall 221, so as to improve the fluidity of the airflow. The first side wall 221 is connected with the boss 12 of the basin frame 1, and one embodiment of the connection structure is shown in fig. 2 and 5, a notch 224 is arranged at the corner of the first side wall 221 away from the bottom wall 222, a protrusion 122 matched with the notch 224 is protruded from the boss 12 towards the center of the basin frame 1, and the first side wall 221 is connected with the boss 12 of the basin frame 1 through the notch 224-protrusion 122 structure. In the assembly process of the sounding device, the technical effect of positioning the magnetic bowl can be achieved by matching the notch and the protrusion, and the assembly precision of the sounding device is improved.

Further, as shown in fig. 3, the side surface of the boss 12 facing the magnetic circuit system 2 is provided with a groove 123, the groove 123 penetrates the boss 12 along the vibration direction (Z direction) of the vibration system 2, and a plurality of grooves are provided at intervals in the drawing, which does not limit the number of the grooves. After the magnetic bowl 22 is assembled in the basin stand 1, glue is filled in the groove 123 to bond the outer wall of the magnetic bowl 22 with the side wall of the boss 12. After the magnetic bowl and the basin frame are preliminarily assembled, the grooves 123 are matched with the outer wall of the magnetic bowl 22 to form a plurality of glue containing grooves for containing glue, so that the bonding strength of the magnetic bowl and the basin frame is greatly enhanced, and the stability of a sounding device product is improved.

Further, the vibration system 3 includes a lower diaphragm 31 fixed on the lower side of the frame body 11, a flexible circuit board 32 disposed between the frame body 11 and the lower diaphragm 31, a voice coil 33 inserted into the first magnetic gap 223, a voice coil bobbin 34 located on the upper side of the voice coil 33 and supported on the flexible circuit board 31, an upper diaphragm 35 provided with a hollow portion 354 and fixed on the upper side of the frame body 11, and a dome 36 covering the hollow portion 354.

Further, referring to fig. 2, the voice coil bobbin 34 includes an annular support portion 341 and support walls 342 oppositely disposed at two sides of the annular support portion 341, the annular support portion 342 abuts against the voice coil 33, the support walls 342 abut against the flexible circuit board 32, and the assembly structure is as shown in fig. 6 and 7, preferably, a plurality of second through holes 343 are disposed on the annular support portion 341, as shown in fig. 2 and 7, the second through holes 343 are perpendicular to the first through holes 121, and the second through holes 343 are favorable for the flow of air flow, so as to improve the performance indexes of the sound generating device, such as Q value, SP L, and the like.

Further, referring to fig. 2 and 7, the upper diaphragm 35 includes a first annular flange 351, a second annular flange 352 located in the ring shape of the first annular flange 351, and an arc 353 connecting the first annular flange 351 and the second annular flange 352, an area surrounded by the second annular flange 352 forms the hollow 354, the arc 353 protrudes toward the dome 36, and the dome 36 is connected to the second annular flange 352.

It should be understood that the above-described embodiments are illustrative, and not restrictive, and that those skilled in the art may make various changes, modifications, substitutions and alterations herein without departing from the scope of the invention, which is intended to be covered by the appended claims.

Claims

1. The utility model provides a sounder, includes the basin frame and is fixed in magnetic circuit and vibration system on the basin frame, a serial communication port, the basin frame includes the basin frame main part and certainly the basin frame main part to the boss that magnetic circuit extends, magnetic circuit is fixed in the boss, be equipped with a plurality of edges on the boss vibration system vibration direction runs through the first through-hole of boss.

2. The sounder device according to claim 1, wherein said magnetic circuit comprises a magnetic steel and a magnetic bowl, said magnetic bowl including oppositely disposed first side walls and a bottom wall connecting said first side walls, said magnetic steel being disposed on said bottom wall and spaced apart from said first side walls to form a first magnetic gap; the first side wall is connected with the boss of the basin frame.

3. A sound-emitting device according to claim 2, wherein the side of the boss facing the magnetic circuit system is provided with a groove which extends through the boss in the direction of vibration of the vibration system.

4. The sounder device according to claim 2, wherein a corner of the first side wall remote from the bottom wall is provided with a notch, the boss protrudes toward the vibration direction of the vibration system to form a protrusion which is matched with the notch, and the first side wall is connected with the boss of the basin stand through the notch-protrusion structure.

5. The sound production device of claim 2, wherein the vibration system comprises a lower diaphragm fixed to the lower side of the frame body, a flexible circuit board disposed between the frame body and the lower diaphragm, a voice coil inserted into the first magnetic gap, a voice coil bobbin located on the upper side of the voice coil and supported on the flexible circuit board, an upper diaphragm provided with a hollow portion and fixed to the upper side of the frame body, and a dome covering the hollow portion.

6. The sound production device of claim 5, wherein the voice coil former comprises an annular support portion, and support walls disposed oppositely on either side of the annular support portion; the annular supporting part is abutted against the voice coil, and the supporting wall is abutted against the flexible circuit board.

7. The sound production device of claim 6, wherein the annular support portion is provided with a plurality of second through holes, the second through holes being perpendicular to the first through holes.

8. The sound production device of claim 5, wherein the upper diaphragm includes a first annular flange, a second annular flange located within the ring of the first annular flange, and an arcuate surface connecting the first annular flange and the second annular flange, the arcuate surface bulging in a direction of the dome, the dome being connected to the second annular flange.