WO2022126771A1

WO2022126771A1 - Loudspeaker

Info

Publication number: WO2022126771A1
Application number: PCT/CN2020/141656
Authority: WO
Inventors: 金鑫; 陶伟伟
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2020-12-16
Filing date: 2020-12-30
Publication date: 2022-06-23
Also published as: CN214101761U

Abstract

The present application relates to the field of electroacoustic conversion, and provides a loudspeaker. The loudspeaker comprises a vibration system, a magnetic circuit system, and a basket. The magnetic circuit system has a magnetic gap. The vibration system comprises a voice diaphragm fixed to the basket, a skeleton fixed to the side of the voice diaphragm facing the magnetic circuit system, and a voice coil suspended in the magnetic gap by means of the skeleton. The voice diaphragm comprises a dome and an upper vibrating diaphragm disposed around the dome. The dome is connected to the upper vibrating diaphragm by means of the skeleton. The dome is provided with a first gluing region overlapping the skeleton, and the skeleton is provided with a second gluing region overlapping the dome. At least one of the first gluing region and the second gluing region is provided with a recess, and the first gluing region and the second gluing region are connected by means of a gluing layer. According to the loudspeaker, by forming a recess in at least one of the first gluing region located on the dome and the second gluing region located on the skeleton, the gluing area between the dome and the skeleton can be increased, thereby improving the connection strength between the dome and the skeleton.

Description

speaker

technical field

The present application relates to the field of electro-acoustic conversion, and in particular, to a loudspeaker.

Background technique

In the existing loudspeaker, the dome and the frame are often connected by gluing.

technical problem

During the working process of the loudspeaker, the connection strength between the dome and the skeleton is often insufficient, resulting in the separation of the dome and the skeleton, which affects the use of the loudspeaker.

technical solutions

The purpose of the present application is to provide a loudspeaker to solve the technical problem of insufficient connection strength between the dome and the frame in the existing loudspeaker.

The technical solution of this application is as follows:

A loudspeaker includes a vibration system, a magnetic circuit system that drives the vibration system to vibrate and sound, and a basin frame that fixes the vibration system and the magnetic circuit system, the magnetic circuit system has a magnetic gap, and the vibration system includes a fixed The sound film on the basin frame, the skeleton fixed on the side of the sound film facing the magnetic circuit system, and the voice coil suspended in the magnetic gap through the skeleton, the sound film includes a dome and a surrounding The upper diaphragm set on the dome, the dome and the upper diaphragm are connected by the frame, the dome is provided with a first gluing area that overlaps with the frame, and the frame is A second gluing area coincident with the dome is provided, at least one of the first gluing area and the second gluing area is provided with a sink, the first gluing area and the second gluing area connected by glue layer.

In some embodiments of the loudspeaker, the first gluing area includes a first area segment and a second area segment that are symmetrically arranged along a first direction, and the second gluing area includes a A third area segment and a fourth area segment coincident with the second area segment, the sink is formed on at least one of the first area segment and the third area segment and on the first area segment On at least one of the second region segment and the fourth region segment, the first direction is perpendicular to the vibration direction of the sound membrane.

In some embodiments of the speaker, the number of the sink grooves is multiple, and the sink grooves located on one side of the speaker along the first direction are arranged at equal intervals along the second direction. The direction is perpendicular to the first direction.

In some embodiments of the loudspeaker, each of the sinks extends along the first direction and includes a first end proximate the outer edge of the dome and a second end remote from the outer edge of the dome, each The distance between the first end and the outer edge of the spherical top is equal, and each of the second ends is located on the same straight line, and the straight line is parallel to the second direction.

In some embodiments of the loudspeaker, the adhesive layer includes a raised portion and a fitting portion, the raised portion is complementary to the sink, the fitting portion is compatible with the first glue region and the The second glued area fits.

In some embodiments of the loudspeaker, the dome is spaced apart from the upper diaphragm.

In some embodiments of the loudspeaker, the loudspeaker further includes a lower diaphragm, the upper diaphragm and the lower diaphragm are disposed opposite to each other along the vibration direction and are respectively connected to the basin frame.

In some embodiments of the loudspeaker, the lower diaphragm includes a first lower diaphragm and a second lower diaphragm that are symmetrically arranged along the first direction.

In some embodiments of the speaker, the speaker further includes a first flexible circuit board and a second flexible circuit board symmetrically arranged along the first direction, and the first lower diaphragm passes through the first flexible circuit The board is connected to the basin frame, the second lower diaphragm is connected to the basin frame through the second flexible circuit board, and the voice coil is electrically connected to the first flexible circuit board.

In some embodiments of the loudspeaker, the frame includes an annular plate connecting the dome and the upper diaphragm, and is bent and extended from the inner edge of the annular plate to the magnetic circuit system for connecting with the dome and the upper diaphragm. The first bending part connected to the voice coil and the first bending part extending from the outer edge of the annular plate to the magnetic circuit system for connecting with the first flexible circuit board and the second flexible circuit board; Two bending parts.

In some embodiments of the loudspeaker, the magnetic circuit system includes a magnetic bowl, a main magnetic steel fixed to the magnetic bowl, and a secondary magnetic steel arranged around the main magnetic steel, and the main magnetic steel is connected to the main magnetic steel. A magnetic gap is formed between the auxiliary magnetic steels, and the side of the voice coil away from the sound membrane is inserted into the magnetic gap;

The magnetic circuit system further includes a main pole core and a secondary pole core, the main pole core is located between the main magnetic steel and the sound membrane and is stacked on the main magnetic steel, and the secondary pole core is connected to the main magnetic steel. The basin frame is connected and located between the auxiliary magnetic steel and the sound film and is stacked on the auxiliary magnetic steel.

In some embodiments of the speaker, a pad is provided on the first flexible circuit board, the voice coil is electrically connected to the first flexible circuit board through the pad, and the secondary magnetic steel is provided with a pad. There are escape grooves for avoiding the pads.

beneficial effect

The beneficial effects of this application are:

The above loudspeaker can increase the gluing area between the dome and the skeleton by forming a sink on at least one of the first gluing area on the dome and the second gluing area on the frame, thereby improving the performance of the dome and the frame. The strength of the connection between the skeletons.

Description of drawings

1 is a schematic diagram of an explosion structure of a loudspeaker in the application;

Fig. 2 is an axial view of the loudspeaker shown in Fig. 1;

Fig. 3 is the top view of the loudspeaker shown in Fig. 1;

Fig. 4 is A-A sectional view in Fig. 3;

Fig. 5 is the enlarged structural schematic diagram of C part in Fig. 4;

Fig. 6 is the sectional view along B-B among Fig. 3;

Fig. 7 is the enlarged structural schematic diagram of D part in Fig. 6;

Fig. 8 is the top view of the dome in the loudspeaker shown in Fig. 1;

Fig. 9 is the axial view of the skeleton in the loudspeaker shown in Fig. 1;

FIG. 10 is an axial view of the secondary magnet in the loudspeaker shown in FIG. 1 .

Embodiments of the present invention

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

Please refer to FIG. 1 to FIG. 10 together to describe the speaker 10 provided by the present application. The speaker 10 includes a vibration system 100, a magnetic circuit system 200 that drives the vibration system 100 to vibrate and sound, and a basin frame 300 that fixes the vibration system 100 and the magnetic circuit system 200. The magnetic circuit system 200 has a magnetic gap, and the vibration system 100 includes a basin The sound film 110 of the frame 300, the bobbin 120 fixed on the side of the sound film 110 facing the magnetic circuit system 200, and the voice coil 130 suspended in the magnetic gap through the bobbin 120, the bobbin 120 is connected with the voice coil 130 to suspend the voice coil 130 Placed on the side of the sound film 110 close to the magnetic circuit system 200, the sound film 110 includes a dome 111 and an upper diaphragm 112 arranged around the dome 111. The dome 111 and the upper diaphragm 112 are connected by a frame 120. The dome 111 There is a first gluing area 1111 overlapping with the frame 120, a second gluing area 1211 overlapping the dome 111 is disposed on the frame 120, and at least one of the first gluing area 1111 and the second gluing area 1211 is provided with a sinker. The groove 1112 , the first glued area 1111 and the second glued area 1211 are connected by the glue layer 400 . In this way, by forming the sink groove 1112 on at least one of the first gluing area 1111 on the dome 111 and the second gluing area 1211 on the frame 120, the gluing area between the dome 111 and the frame 120 can be increased, Thus, the connection strength between the dome 111 and the frame 120 is improved. As shown in FIG. 7 , in this embodiment, the sink groove 1112 is formed in the first gluing area 1111 , that is, the sink groove 1112 is formed in the first gluing area 1111 by opening the sink groove 1112 on the dome 111 . The sink groove 1112 can adjust the groove depth, groove area and groove shape according to different glue requirements and the structural characteristics of the speaker 10 , so as to optimize the bonding strength between the dome 111 and the frame 120 .

Please continue to refer to FIG. 7 , the glue layer 400 is formed after the above-mentioned glue is solidified. Since the glue has fluidity, it flows into the sink 1112 and then solidifies, so that the glue layer 400 has a structure to be glued to the wall of the sink 1112, thereby increasing the dome Glue area between 111 and skeleton 120.

Specifically, in one embodiment, the adhesive layer 400 includes a raised portion 410 and a fitting portion 420 , the raised portion 410 is complementary to the recessed groove 1112 , and the fitting portion 420 is fitted with the first adhesive area 1111 and the second adhesive area 1211 combine. The protrusions 410 are complementary to the sink grooves 1112 to ensure that the gluing area is maximized, and the volume of the adhesive layer 400 in the sink grooves 1112 is also maximized, which can further improve the connection strength of the glue layer 400 at the sink grooves 1112 .

In one embodiment, the first gluing area 1111 includes a first area segment 1111a and a second area segment 1111b symmetrically arranged along the first direction, and the second gluing area 1211 includes a third area segment 1121a overlapping with the first area segment 1111a As well as the fourth area segment 1121b overlapping the second area segment 1111b, the sink 1112 is formed on the first area segment 1111a and the second area segment 1111b, and the first direction is perpendicular to the vibration direction of the sound membrane 110. In this way, while improving the connection strength of the overlapping area between the dome 111 and the frame 120 , it is ensured that the dome 111 can reach a certain amplitude, thereby ensuring the normal use of the speaker 10 .

As shown in FIG. 2 and FIG. 3 , in one embodiment, the spherical top 111 is spaced apart from the upper diaphragm 112 . In this way, it is ensured that the spherical top 111 and the upper diaphragm 112 do not interfere with each other during vibration and deformation, thereby ensuring the vibrating and sounding effect of the speaker 10 .

Please continue to refer to FIG. 1 , FIG. 2 , and FIGS. 4 to 6 . On the basis of the above-mentioned embodiment, the speaker 10 further includes a lower diaphragm 500 , and the upper diaphragm 112 and the lower diaphragm 500 are disposed opposite to each other along the vibration direction of the sound diaphragm 110 . and are respectively connected with the basin frame 300 . Specifically, the side of the outer edge of the upper diaphragm 112 away from the dome 111 is provided with a folded edge 1121 extending from the side of the lower diaphragm 500 and connected to the basin frame 300 , so as to ensure the gap between the upper diaphragm 112 and the basin frame 300 The upper diaphragm 112 also includes an inner edge portion 1122 connected to the frame 120 and a folded ring portion 1123 located between the folded edge 1121 and the inner rim portion 1122, and the folded ring portion protrudes toward the lower diaphragm 500 side.

In one embodiment, the lower diaphragm 500 includes a first lower diaphragm 510 and a second lower diaphragm 520 symmetrically arranged along a first direction, and the first direction is perpendicular to the vibration direction. The first lower diaphragm 510 and the second lower diaphragm 520 are symmetrically arranged along the first direction. Since the first lower diaphragm 510 and the second lower diaphragm 520 are disposed at opposite ends of the speaker 10 along the first direction, the overlapping area of the dome 111 and the frame 120 corresponds to the first lower diaphragm 510 and the second lower diaphragm The vibration frequencies and amplitudes experienced at the location of the membrane 520 are greater and require higher connection strength than other locations. To this end, in this embodiment, the first gluing area 1111 includes a first area segment 1111a and a second area segment 1111b symmetrically arranged along the first direction, and the second gluing area 1211 includes a third area overlapping with the first area segment 1111a The segment 1121a and the fourth area segment 1121b coincident with the second area segment 1111b, the sink 1112 is formed on the first area segment 1111a and the second area segment 1111b. In this way, the connection strength of the overlapping area between the dome 111 and the frame 120 corresponding to the first lower diaphragm 510 and the second lower diaphragm 520 can be improved, and the service life of the speaker 10 can be improved.

Further, the number of the sinking grooves 1112 is plural, and the sinking grooves 1112 located on one side of the speaker 10 along the first direction are arranged at equal intervals along the second direction. In this way, the uniform distribution of the bonding force between the dome 111 and the frame 120 and the vibration stability of the speaker 10 are ensured. The second direction is perpendicular to the first direction. In this embodiment, the first direction is parallel to the direction indicated by arrow X in FIG. 2 , the second direction is parallel to the direction indicated by arrow Y in FIG. 2 , and the vibration direction is parallel to the direction indicated by arrow Z in FIG. 2 .

Further, each sinking groove 1112 extends along the first direction and includes a first end 1112a close to the outer edge of the dome 111 and a second end 1112b away from the outer edge of the dome 111 . The distances are equal, and the second ends 1112b are located on the same straight line, and the straight line is parallel to the second direction. The above distribution of the sink grooves 1112 ensures the overall balance of the speaker 10 and the force balance of the dome 111. The distance between each first end 1112a and the outer edge of the dome 111 is equal to ensure that the connection between the dome 111 and the frame 120 is weak, that is, the dome. The force at the outer edge of the 111 is uniform, so as to avoid stress concentration affecting the stability of the vibration of the dome 111 and the sound membrane 110 .

On the basis of the above-mentioned series of embodiments, the speaker 10 further includes a first flexible circuit board 600 and a second flexible circuit board 700 symmetrically arranged along the first direction, and the first lower diaphragm 510 communicates with the basin through the first flexible circuit board 600 . The frame 300 is connected, the second lower diaphragm 520 is connected to the basin frame 300 through the second flexible circuit board 700 , and the voice coil 130 is electrically connected to the first flexible circuit board 600 . The first lower diaphragm 510 and the second lower diaphragm 520 are elastically connected to the basin frame 300 by utilizing the good elasticity of the first flexible circuit board 600 and the second flexible circuit board 700, so as to ensure the first lower diaphragm 510 and the vibration stability of the second lower diaphragm 520 . In addition, the symmetrical arrangement of the first lower diaphragm 510 and the second lower diaphragm 520 and the symmetrical arrangement of the first lower diaphragm 510 and the second lower diaphragm 520 can ensure the overall balance of the speaker 10, thereby ensuring the stability of the vibration output. The voice coil 130 is formed by winding a wire, and an incoming and outgoing wire 131 for the voice coil 130 to conduct electricity is provided on it. connect.

Please continue to refer to FIG. 1 , FIG. 4 and FIG. 5 , in one embodiment, the frame 120 includes a ring-shaped plate 121 connecting the dome 111 and the upper diaphragm 112 , and is bent from the inner edge of the ring-shaped plate 121 to the magnetic circuit system 200 The first bending part 122 extending for connecting with the voice coil 130 and the first bending part 122 being bent and extending from the outer edge of the annular plate 121 to the magnetic circuit system 200 for connecting with the first flexible circuit board 600 and the second flexible circuit board 700 . Two bending parts 123 . In this way, the skeleton 120 connects the dome 111 , the upper diaphragm 112 , the voice coil 130 , the first flexible circuit board 600 , the second flexible circuit board 700 , the first lower diaphragm 510 and the second lower diaphragm 520 into one, and the magnetic The circuit system 200 drives the co-vibration of the above structure by driving the voice coil 130 to realize the sound of the speaker 10 . At the same time, the first flexible circuit board 600 and the second flexible circuit board 700 can effectively suppress the lateral swing of the voice coil 130 , thereby improving the reliability and stability of the speaker 10 .

Specifically, the magnetic circuit system 200 includes a magnetic bowl 210 , a main magnetic steel 220 fixed to the magnetic bowl 210 , and a secondary magnetic steel 230 arranged around the main magnetic steel 220 . A magnetic gap is formed between the main magnetic steel 220 and the secondary magnetic steel 230 . , the side of the voice coil 130 away from the sound film 110 is inserted into the magnetic gap. After the voice coil 130 is energized, an electromagnetic force is generated with the magnetic circuit system 200 to drive the components connected to the frame 120 to vibrate. As shown in FIG. 1 , in this embodiment, the number of secondary magnets 230 is four, including two secondary magnets 230 arranged along the first direction and two secondary magnets 230 arranged along the second direction, namely the magnetic The road system 200 is a five-magnet steel system. The magnetic circuit system 200 further includes a main pole core 240 and a secondary pole core 250 , the main pole core 240 is located between the main magnetic steel 220 and the sound film 110 and is stacked on the main magnetic steel 220 , and the secondary pole core 250 is connected to the basin frame 300 and It is located between the secondary magnet 230 and the sound film 110 and is stacked on the secondary magnet 230 . Specifically, the main magnetic steel 220 and the main pole core 240 are located in the center of the magnetic bowl 210 . The secondary pole core 250 is annular and is annularly disposed on the voice coil 130 . In this way, the performance of the magnetic circuit system 200 can be further improved, so that as many magnetic lines of force of the magnetic circuit system 200 are cut as possible by the voice coil 130 to form a larger driving force.

As shown in FIG. 10 , further, the first flexible circuit board 600 is provided with a pad 610 , the voice coil 130 is electrically connected to the first flexible circuit board 600 through the pad 610 , and the secondary magnetic steel 230 is provided with a pad for avoiding The avoidance groove 231 of the 610 is used to prevent the secondary magnetic steel 230 from interfering with the vibration of the voice coil 130 on the side of the pad 610 when the magnetic circuit system 200 drives the voice coil 130 to vibrate.

The above are only the embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present application, but these belong to the present application. scope of protection.

Claims

A loudspeaker includes a vibration system, a magnetic circuit system that drives the vibration system to vibrate and sound, and a basin frame that fixes the vibration system and the magnetic circuit system, the magnetic circuit system has a magnetic gap, and is characterized in that the The vibration system includes a sound membrane fixed on the basin frame, a skeleton fixed on the side of the sound membrane facing the magnetic circuit system, and a voice coil suspended in the magnetic gap through the skeleton, and the sound membrane includes a dome and an upper diaphragm arranged around the dome, the dome and the upper diaphragm are connected by the skeleton, and the dome is provided with a first gluing area that overlaps with the skeleton, The frame is provided with a second gluing area overlapping with the dome, at least one of the first gluing area and the second gluing area is provided with a sink, the first gluing area and the The second glued areas are connected by glue layers.
The loudspeaker according to claim 1, wherein the first gluing area includes a first area segment and a second area segment symmetrically arranged along a first direction, and the second gluing area includes a a third area segment coincident with the second area segment and a fourth area segment coincident with the second area segment, the sink is formed on at least one of the first area segment and the third area segment and is formed on the On at least one of the second region segment and the fourth region segment, the first direction is perpendicular to the vibration direction of the sound membrane.
The loudspeaker according to claim 2, wherein the number of the sink grooves is plural, and the sink grooves located on one side of the speaker along the first direction are arranged at equal intervals along the second direction, so The second direction is perpendicular to the first direction.
The loudspeaker of claim 3, wherein each of the sinks extends along the first direction and includes a first end close to the outer edge of the dome and a second end away from the outer edge of the dome , the distances between each of the first ends and the outer edge of the dome are equal, and each of the second ends is located on the same straight line, and the straight line is parallel to the second direction.
The loudspeaker according to claim 4, wherein the adhesive layer comprises a convex portion and a fitting portion, the convex portion is complementary to the sink groove, and the fitting portion is connected to the first adhesive region and the second glued area.
The loudspeaker according to claim 5, wherein the spherical top and the upper diaphragm are spaced apart.
The loudspeaker according to claim 6, characterized in that, the loudspeaker further comprises a lower diaphragm, the upper diaphragm and the lower diaphragm are disposed opposite to each other along the vibration direction and are respectively connected to the basin frame.
The loudspeaker according to claim 7, wherein the lower diaphragm comprises a first lower diaphragm and a second lower diaphragm which are symmetrically arranged along the first direction.
The loudspeaker according to claim 8, wherein the loudspeaker further comprises a first flexible circuit board and a second flexible circuit board symmetrically arranged along the first direction, and the first lower diaphragm passes through the first flexible circuit board. A flexible circuit board is connected to the basin frame, the second lower diaphragm is connected to the basin frame through the second flexible circuit board, and the voice coil is electrically connected to the first flexible circuit board.
The loudspeaker according to claim 9, wherein the frame comprises an annular plate connecting the dome and the upper diaphragm, and is bent and extended from the inner edge of the annular plate toward the magnetic circuit system a first bending part for connecting with the voice coil and a bending extension from the outer edge of the annular plate to the magnetic circuit system for connecting with the first flexible circuit board and the second flexible circuit board Connected second bent portion.
The loudspeaker according to claim 10, wherein the magnetic circuit system comprises a magnetic bowl, a main magnetic steel fixed to the magnetic bowl, and a secondary magnetic steel arranged around the main magnetic steel, the main magnetic steel A magnetic gap is formed between the steel and the auxiliary magnetic steel, and the side of the voice coil away from the sound membrane is inserted into the magnetic gap;

The magnetic circuit system further includes a main pole core and a secondary pole core, the main pole core is located between the main magnetic steel and the sound membrane and is stacked on the main magnetic steel, and the secondary pole core is connected to the main magnetic steel. The basin frame is connected and located between the auxiliary magnetic steel and the sound film and is stacked on the auxiliary magnetic steel.
The speaker according to claim 11, wherein a pad is provided on the first flexible circuit board, the voice coil is electrically connected to the first flexible circuit board through the pad, and the secondary magnetic The steel is provided with avoidance grooves for avoiding the pads.