Two-in-one buzzing loudspeaker

Abstract

The invention provides a two-in-one buzzing loudspeaker. The two-in-one buzzing loudspeaker comprises a shell, a loudspeaker assembly and a buzzer assembly, a first mounting cavity with an opening in the upper end is formed in the upper portion of the shell, a second mounting cavity with an opening in the lower end is formed in the lower portion of the shell, and the loudspeaker assembly and the buzzer assembly are installed in the first mounting cavity and the second mounting cavity respectively; a first sounding channel for communicating the first mounting cavity and the second mounting cavity is vertically arranged in the middle of the inner side of the shell, a second sounding channel is vertically arranged in the middle of the loudspeaker assembly, and sound waves generated by the buzzer assembly are emitted from the shell through the second sounding channel and the first sounding channel in sequence; according to the invention, the production cost of the two-in-one buzzing loudspeaker can be reduced, and the two-in-one buzzing loudspeaker can be reliably applied to a narrow installation environment.

Description

Technical Field

[0001] The present invention relates to the technical field of sound generating devices, and in particular to a two-in-one buzzer speaker. Background Art

[0002] Piezoelectric buzzer is a kind of sound alarm device widely used in household appliances. It pastes the piezoelectric ceramic sheet after high voltage polarization on the vibrating metal sheet. When AC voltage is added, it will produce mechanical deformation, stretching and contraction due to the piezoelectric effect. This characteristic is used to make the vibrating metal sheet vibrate and make a sound. The short sound can have a better alarm effect. The speaker is a sound device that can perform electroacoustic conversion more completely. If the functions of buzzer and speaker can be combined, a more ideal warning effect can be obtained. Only the short and sharp sound of the buzzer can easily attract the attention of people around, and the pre-stored warning information can be played through the speaker to give a more clear alarm prompt.

[0003] However, although both are used for sound generation, due to the differences in uses and sound generation principles, the functional requirements for the two are inconsistent. Therefore, generally, when setting up a buzzer and a speaker, they are placed separately as separate functional devices; however, there is indeed a demand for saving installation space and simplifying wiring in the product. For this reason, Chinese Patent Publication No.: CN116980811A discloses a two-in-one buzzer speaker. In the two-in-one buzzer speaker structure, since the hollow sound guide cavity for the buzzer assembly to emit sound is located on the basin frame on the radial outside of the speaker assembly, the two-in-one buzzer speaker has the disadvantage of a large overall outer diameter, that is, the two-in-one buzzer speaker has the disadvantages of high production cost and cannot be applied to a narrow installation environment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a two-in-one buzzer speaker, which can reduce the production cost of the two-in-one buzzer speaker and enable the two-in-one buzzer speaker to be reliably applied to a narrow installation environment.

[0005] The present invention provides a two-in-one buzzer speaker, comprising a shell, a speaker assembly and a buzzer assembly; the upper part of the shell is provided with a first installation cavity with an upper end opening, the lower part of the shell is provided with a second installation cavity with a lower end opening, the speaker assembly and the buzzer assembly are respectively installed in the first installation cavity and the second installation cavity; a first sound outlet channel for connecting the first installation cavity and the second installation cavity is vertically provided in the middle part of the inner side of the shell, a second sound outlet channel is vertically provided in the middle part of the speaker assembly, and sound waves generated by the buzzer assembly are sequentially emitted from the shell through the second sound outlet channel and the first sound outlet channel.

[0006] After adopting the above structure, the present invention enables the buzzer assembly and the speaker assembly to achieve the purpose of coaxial sounding because the first sound outlet channel for the buzzer assembly to emit sound is respectively located in the middle of the inner side of the shell and the middle of the speaker assembly, that is, the outer diameter of the two-in-one buzzer speaker can be effectively reduced, thereby reducing the production cost of the two-in-one buzzer speaker and enabling the two-in-one buzzer speaker to be reliably applied to a narrow installation environment.

[0007] In a possible embodiment, the speaker assembly includes a sound membrane, a voice coil, a foam, a pole piece, a permanent magnet, a magnetic conductive part, a first circuit board and a first conductive pin group; the sound membrane, the voice coil, the foam, the pole piece, the permanent magnet and the magnetic conductive part are all ring-shaped structures and are coaxially arranged, and the second sound outlet channel is formed on the inner side of the sound membrane, the voice coil, the foam, the pole piece, the permanent magnet and the magnetic conductive part; the outer edge of the sound membrane is fixed to the inner edge of the upper end of the first mounting cavity, the foam, the pole piece, the permanent magnet and the magnetic conductive part are arranged in sequence from top to bottom below the sound membrane and fixed to the shell as a whole, and the voice coil is fixed to the lower end of the sound membrane; the first circuit board is fixed to the inner top of the second mounting cavity, the first conductive pin group is welded and fixed to the first circuit board and conducts electricity, and the voice coil and the first circuit board are connected by the first The connecting wire is electrically connected; by adopting the above-mentioned speaker assembly, when the changing current signal flows through the voice coil, the voice coil can generate a changing magnetic field, so that under the cooperation of the voice coil, the permanent magnet and the magnetic conductive part, the voice coil can drive the sound membrane to float up and down, that is, the sound membrane can generate sound waves and make sounds; in addition, by adopting the above-mentioned structure, the second sound outlet channel can be reliably formed on the inner side of the sound membrane, voice coil, foam, pole piece, permanent magnet and magnetic conductive part, that is, the sound waves generated by the buzzer assembly can be reliably emitted from the shell through the second sound outlet channel and the first sound outlet channel in sequence; in addition, the foam, pole piece, permanent magnet and magnetic conductive part are glued and fixed, and the magnetic conductive part and the shell are also glued and fixed; the above-mentioned foam is used to support the middle part of the sound membrane.

[0008] In a possible embodiment, a vertical edge in a ring shape that bends upward is provided at the outer edge of the magnetic conductive component, an annular groove is provided at the inner bottom of the first mounting cavity, the magnetic conductive component is embedded in the annular groove and the vertical edge is in close contact with the side wall of the annular groove, and the lower part of the voice coil is inserted into the gap formed by the vertical edge and the foam, the pole piece and the permanent magnet; by adopting this structure, the vertical edge can reliably guide the magnetic field generated by the permanent magnet to the outside of the voice coil in the radial direction, so that when a changing current signal flows through the voice coil, under the cooperation of the voice coil, the permanent magnet, the magnetic conductive component and the vertical edge, the voice coil can reliably drive the sound membrane to float up and down, so that the sound membrane can reliably generate sound waves and make sounds; in addition, since the magnetic conductive component is embedded in the annular groove and the vertical edge is in close contact with the side wall of the annular groove, the magnetic conductive component can be reliably fixed to the shell, and the radial displacement of the magnetic conductive component can be limited.

[0009] In a possible embodiment, an annular step is provided on the inner wall of the upper end of the first mounting cavity, the speaker assembly also includes a pressure ring, the outer edge of the sound membrane is supported on the annular step, the pressure ring is arranged inside the annular step and fixed to the shell, and the outer edge of the sound membrane is pressed against the annular step by the pressure ring; after adopting this structure, under the action of the pressure ring, the outer edge of the sound membrane can be reliably pressed against the annular step, and the outer edges of the pressure ring and the sound membrane are glued and fixed to the annular step, that is, the pressure ring and the sound membrane can be conveniently and reliably fixed.

[0010] In a possible implementation, the pressure ring is fixed to the shell by circumferential bonding with glue; by adopting this structure, the pressure ring can be reliably and conveniently fixed on the annular step, and the outer edge of the sound membrane can be reliably pressed.

[0011] In one possible embodiment, an annular cavity with an open upper end is provided at the bottom of the outer edge of the annular step, and the annular cavity is used for glue to flow in and to bond and fix the outer edge of the sound membrane to the annular step after the glue is cured; by adopting this structure, since the annular cavity is provided at the bottom of the outer edge of the annular step, when the glue is glued to the pressure ring and the outer edge of the sound membrane, the glue can flow into the annular cavity, thereby increasing the contact area between the glue and the shell, and the glue can be bonded and fixed to the bottom surface of the outer edge of the sound membrane, and then the outer edge of the sound membrane can be further reliably fixed to the annular step.

[0012] In a possible embodiment, the buzzer assembly includes a buzzer sheet, a bottom cover, a second circuit board and a second conductive pin group; an annular boss is vertically arranged on the inner top of the second mounting cavity, the buzzer sheet is bonded and fixed to the lower end of the annular boss, the bottom cover is embedded in the opening at the lower end of the second mounting cavity and fixed to the shell, the second circuit board is fixed on the bottom cover, the buzzer sheet is electrically connected to the second circuit board, the second conductive pin group is welded and fixed to the second circuit board and conducts electricity, and the lower end of the second conductive pin group penetrates the bottom cover and extends out of the bottom cover; by adopting this buzzer assembly, when the second conductive pin group is energized, the second circuit board can drive the buzzer sheet to vibrate and generate sound waves, and the sound waves generated by the buzzer sheet can be emitted from the shell through the second sound outlet channel and the first sound outlet channel in sequence, so that the buzzer assembly and the speaker assembly can achieve the purpose of coaxial sounding; in addition, the buzzer sheet is fixed to the lower end of the annular boss by gluing.

[0013] In a possible embodiment, an embedding groove is provided on the upper end surface of the bottom cover, and the second circuit board is embedded in the embedding groove and fixed to the bottom cover; a plurality of positioning posts are provided on the inner bottom of the embedding groove, and positioning holes corresponding to the plurality of positioning posts are provided on the second circuit board, and each positioning post is vertically inserted in the positioning hole at a corresponding position; by adopting this structure, after the second circuit board is embedded in the embedding groove and glue is poured into the embedding groove, the second circuit board can be reliably glued and fixed to the bottom cover; in addition, since each positioning post is vertically inserted in the positioning hole at a corresponding position, before the second circuit board is glued and fixed to the bottom cover, the purpose of limiting and positioning can be achieved between the second circuit board and the bottom cover, that is, it can bring convenience to the assembly of the second circuit board and the bottom cover, and can improve the reliability of the second circuit board and the bottom cover after assembly.

[0014] In a possible embodiment, a through hole corresponding to each first conductive pin in the first conductive pin group is provided on the bottom cover, and the lower end of each first conductive pin vertically penetrates the through hole at the corresponding position and then extends out of the bottom cover; by adopting this structure, each first conductive pin in the first conductive pin group can be reliably led out of the shell, and because the lower end of each first conductive pin vertically penetrates the through hole at the corresponding position and then extends out of the bottom cover, it can play a role in limiting each first conductive pin, so as to avoid the first conductive pin from bending or being desoldered from the first circuit board due to lateral extrusion.

[0015] In a possible embodiment, a limiting block is provided on the outer edge of the bottom cover, and a limiting groove is provided on the side wall of the lower end of the shell, and the limiting block is embedded in the limiting groove; by adopting this structure, when the bottom cover and the lower end of the shell are assembled, the limiting block can be embedded in the limiting groove, thereby facilitating the assembly of the bottom cover and the shell, and improving the reliability of the bottom cover and the shell after assembly. In addition, the bottom cover and the shell are fixed together by gluing; in addition, after the bottom cover and the shell are limited, when the bottom cover and the shell are glued and fixed, the bottom cover can be prevented from rotating or moving relative to the shell, thereby preventing the bottom cover from causing lateral extrusion force on the first conductive pin, and further preventing the first conductive pin from bending or being desoldered from the first circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a first three-dimensional structural schematic diagram of the present invention.

[0017] Figure 2 It is a second three-dimensional structural schematic diagram of the present invention.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention.

[0019] in: 1-shell; 11-first mounting cavity; 12-second mounting cavity; 13-first sound outlet channel; 14-annular groove; 15-annular step; 16-annular concave cavity; 17-annular boss; 18-limiting groove; 2-second sound outlet channel; 31-sound membrane; 32-voice coil; 33-foam; 34-pole piece; 35-permanent magnet; 36-magnetic conductive part; 361-vertical edge; 37-first circuit board; 38-first conductive pin group; 381-first conductive pin; 39-pressure ring; 41-buzzer; 42-bottom cover; 421-embedded groove; 422-positioning column; 423-through hole; 424-limiting block; 43-second circuit board; 431-positioning hole; 44-second conductive pin group. DETAILED DESCRIPTION

[0020] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0021] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0022] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] See also Figure 1-3As shown, the embodiment of the present application discloses a two-in-one buzzer speaker, including a shell 1, a speaker assembly and a buzzer assembly; the upper part of the shell 1 is provided with a first installation cavity 11 with an upper end opening, and the lower part of the shell 1 is provided with a second installation cavity 12 with a lower end opening, and the speaker assembly and the buzzer assembly are respectively installed in the first installation cavity 11 and the second installation cavity 12; a first sound outlet channel 13 for connecting the first installation cavity 11 and the second installation cavity 12 is vertically provided in the middle part of the inner side of the shell 1, and a second sound outlet channel 2 is vertically provided in the middle part of the speaker assembly, and the sound waves generated by the buzzer assembly are emitted from the shell 1 through the second sound outlet channel 2 and the first sound outlet channel 13 in sequence.

[0025] See again Figure 3 As shown, the speaker assembly includes a diaphragm 31, a voice coil 32, a foam 33, a pole piece 34, a permanent magnet 35, a magnetic conductive member 36, a first circuit board 37 and a first conductive pin group 38; the diaphragm 31, the voice coil 32, the foam 33, the pole piece 34, the permanent magnet 35 and the magnetic conductive member 36 are all ring-shaped structures and are coaxially arranged, and the second sound outlet channel 2 is formed on the inner side of the diaphragm 31, the voice coil 32, the foam 33, the pole piece 34, the permanent magnet 35 and the magnetic conductive member 36; the outer edge of the diaphragm 31 is connected to the first installation cavity 1 1 is fixed, the foam 33, the pole piece 34, the permanent magnet 35 and the magnetic conductive member 36 are arranged in sequence from top to bottom below the sound diaphragm 31 and fixed to the housing 1 as a whole, the voice coil 32 is fixed to the lower end of the sound diaphragm 31; the first circuit board 37 is fixed to the inner top of the second installation cavity 12, the first conductive pin group 38 is welded and fixed to the first circuit board 37 and conducts electricity, and the voice coil 32 is electrically connected to the first circuit board 37 through a first connecting line; after adopting the above-mentioned speaker assembly, when the changing current signal flows When passing through the voice coil 32, the voice coil 32 can generate a changing magnetic field, so that under the cooperation of the voice coil 32, the permanent magnet 35 and the magnetic conductive member 36, the voice coil 32 can drive the sound membrane 31 to float up and down, that is, the sound membrane 31 can generate sound waves and make sounds; in addition, by adopting the above structure, the second sound outlet channel 2 can be reliably formed on the inner side of the sound membrane 31, the voice coil 32, the foam 33, the pole piece 34, the permanent magnet 35 and the magnetic conductive member 36, that is, the sound waves generated by the buzzer assembly can pass through the first The second sound outlet channel 2 and the first sound outlet channel 13 are reliably emitted from the shell 1; in addition, the foam 33, the pole piece 34, the permanent magnet 35 and the magnetic conductive part 36 are glued and fixed, and the magnetic conductive part 36 is also glued and fixed to the shell 1; the above-mentioned foam 33 is used to support the middle part of the sound membrane 31. Since the foam 33 is flexible, the foam 33 can be deformed when the sound membrane 31 floats up and down, and when the foam 33 is deformed, it can always play a reliable supporting role for the middle part of the sound membrane 31.

[0026] See again Figure 3As shown, a vertical edge 361 in a ring shape that is bent upward is provided at the outer edge of the magnetic conductive member 36, an annular groove 14 is provided at the inner bottom of the first mounting cavity 11, the magnetic conductive member 36 is embedded in the annular groove 14 and the vertical edge 361 is in close contact with the side wall of the annular groove 14, and the lower part of the voice coil 32 is inserted into the gap formed by the vertical edge 361 and the foam 33, the pole piece 34 and the permanent magnet 35; by adopting this structure, the vertical edge 361 can reliably guide the magnetic field generated by the permanent magnet 35 to the outside of the voice coil 32 in the radial direction, so that when the changing current signal flows through the voice coil 32, under the cooperation of the voice coil 32, the permanent magnet 35, the magnetic conductive member 36 and the vertical edge 361, the voice coil 32 can reliably drive the sound membrane 31 up and down. Floating, so that the sound membrane 31 can reliably generate sound waves and make sounds; in addition, because the magnetic component 36 is embedded in the annular groove 14 and the vertical edge 361 is in close contact with the side wall of the annular groove 14, the magnetic component 36 can be reliably fixed to the shell 1, and the radial displacement of the magnetic component 36 can be limited; in order to further improve the fixing firmness of the magnetic component 36 and the shell 1, the magnetic component 36 can also be fixed in the annular groove 14 by gluing, that is, when producing this product, glue is pre-coated on the bottom and side walls of the annular groove 14, and then the magnetic component 36 is embedded in the annular groove 14. After the glue coated on the bottom and side walls of the annular groove 14 is cured, the magnetic component 36 and the shell 1 can be reliably fixed.

[0027] See again Figure 3 As shown, an annular step 15 is arranged on the inner wall of the upper end of the first mounting cavity 11, and the speaker assembly also includes a pressure ring 39, the outer edge of the sound diaphragm 31 is supported on the annular step 15, the pressure ring 39 is arranged inside the annular step 15 and fixed to the shell 1, and the outer edge of the sound diaphragm 31 is pressed against the annular step 15 by the pressure ring 39; after adopting this structure, under the action of the pressure ring 39, the outer edge of the sound diaphragm 31 can be reliably pressed against the annular step 15, and the outer edges of the pressure ring 39 and the sound diaphragm 31 are glued and fixed to the annular step 15, that is, the pressure ring 39 and the sound diaphragm 31 can be conveniently and reliably fixed.

[0028] See again Figure 3 As shown, the pressure ring 39 is circumferentially bonded and fixed to the shell 1 by glue; by adopting this structure, the pressure ring 39 can be reliably and conveniently fixed on the annular step 15, and the outer edge of the sound membrane 31 can be reliably pressed; at the same time, the glue can penetrate between the lower end surface of the pressure ring 39 and the upper surface of the outer edge of the sound membrane 31, that is, the outer edge of the sound membrane 31 itself can also be bonded and fixed with the pressure ring 39, that is, the reliability of fixing the sound membrane 31 can be further improved.

[0029] See again Figure 3As shown, an annular cavity 16 with an upper opening is provided at the bottom of the outer edge of the annular step 15, and the annular cavity 16 is used for glue to flow in and to bond and fix the outer edge of the sound membrane 31 to the annular step 15 after the glue is cured. After adopting this structure, since the annular cavity 16 is provided at the bottom of the outer edge of the annular step 15, when the glue is glued to the pressure ring 39 and the outer edge of the sound membrane 31, the glue can flow into the annular cavity 16, thereby increasing the contact area between the glue and the shell 1, and the glue can be bonded and fixed to the bottom surface of the outer edge of the sound membrane 31, and then the outer edge of the sound membrane 31 can be further reliably fixed to the annular step 15, that is, the anti-separation effect of the sound membrane 31 and the shell 1 can be improved.

[0030] See again Figure 3 As shown, the buzzer assembly includes a buzzer sheet 41, a bottom cover 42, a second circuit board 43 and a second conductive pin group 44; an annular boss 17 is vertically arranged on the inner top of the second mounting cavity 12, the buzzer sheet 41 is bonded and fixed to the lower end of the annular boss 17, the bottom cover 42 is embedded in the opening at the lower end of the second mounting cavity 12 and fixed to the housing 1, the second circuit board 43 is fixed on the bottom cover 42, the buzzer sheet 41 is electrically connected to the second circuit board 43, the second conductive pin group 44 is welded and fixed to the second circuit board 43 and conducts electricity, and the lower end of the second conductive pin group 44 is fixed to the bottom cover 42. The end penetrates the bottom cover 42 and then extends out of the bottom cover 42; by adopting this buzzer assembly, when the second conductive pin group 44 is energized, the second circuit board 43 can drive the buzzer plate 41 to vibrate and generate sound waves, and the sound waves generated by the buzzer plate 41 can be emitted from the shell 1 through the second sound outlet channel 2 and the first sound outlet channel 13 in sequence, so that the buzzer assembly and the speaker assembly can achieve the purpose of coaxial sounding; in addition, the buzzer plate 41 is fixed to the lower end of the annular boss 17 by gluing; the above-mentioned annular boss 17 is integrally formed with the shell 1.

[0031] See again Figure 3As shown, an embedding groove 421 is provided on the upper end surface of the bottom cover 42, and the second circuit board 43 is embedded in the embedding groove 421 and fixed to the bottom cover 42; a plurality of positioning posts 422 are provided on the inner bottom of the embedding groove 421, and positioning holes 431 corresponding to the plurality of positioning posts 422 are provided on the second circuit board 43, and each positioning post 422 is vertically inserted into the positioning hole 431 at the corresponding position; by adopting this structure, after the second circuit board 43 is embedded in the embedding groove 421 and glue is poured into the embedding groove 421, the second circuit board 43 can be reliably glued and fixed together with the bottom cover 42; in addition, since each positioning post 422 is vertically inserted into the positioning hole at the corresponding position 431, so that before the second circuit board 43 and the bottom cover 42 are glued and fixed, the purpose of limiting and positioning can be achieved between the second circuit board 43 and the bottom cover 42, that is, it can bring convenience to the assembly of the second circuit board 43 and the bottom cover 42, and can improve the reliability of the second circuit board 43 and the bottom cover 42 after assembly; in addition, in order to facilitate each positioning column 422 to be smoothly inserted into the positioning hole 431 at the corresponding position, a ring-shaped chamfered surface can be set on the outer wall of the upper end of each positioning column 422, so that in the process of inserting the positioning column 422 into the positioning hole 431, the chamfered surface can cooperate with the hole wall of the positioning hole 431 to guide so as to facilitate the positioning column 422 to be inserted into the positioning hole 431.

[0032] See again Figure 2 As shown, the bottom cover 42 is provided with through holes 423 corresponding to each first conductive pin 381 in the first conductive pin group 38, and the lower end of each first conductive pin 381 vertically penetrates the through hole 423 at the corresponding position and then protrudes out of the bottom cover 42; by adopting this structure, each first conductive pin 381 in the first conductive pin group 38 can be reliably led out of the shell 1, and because the lower end of each first conductive pin 381 vertically penetrates the through hole 423 at the corresponding position and then protrudes out of the bottom cover 42, it can play a role in limiting each first conductive pin 381, so as to avoid the first conductive pin 381 from bending or being desoldered from the first circuit board 37 due to lateral extrusion.

[0033] See again Figure 2As shown, a limiting block 424 is provided on the outer edge of the bottom cover 42, and a limiting groove 18 is provided on the side wall of the lower end of the shell 1, and the limiting block 424 is embedded in the limiting groove 18; after adopting this structure, when the bottom cover 42 and the lower end of the shell 1 are assembled, the limiting block 424 can be embedded in the limiting groove 18, so that the assembly of the bottom cover 42 and the shell 1 can be convenient, and the reliability of the bottom cover 42 and the shell 1 after assembly can be improved. Moreover, the bottom cover 42 and the shell 1 are fixed together by gluing; in addition, after the bottom cover 42 and the shell 1 are limited, when the bottom cover 42 and the shell 1 are glued and fixed, the bottom cover 42 can be prevented from being damaged. The cover 42 rotates or moves relative to the shell 1, thereby preventing the bottom cover 42 from causing lateral squeezing force on the first conductive pin 381, and further preventing the first conductive pin 381 from bending or being desoldered from the first circuit board 37; in addition, in order to achieve axial limitation of the bottom cover 42 and the shell 1, an annular support groove is provided on the inner wall of the lower end of the second mounting cavity 12, and the outer edge of the upper end surface of the bottom cover 42 abuts against the annular support groove. The annular support groove can support and limit the bottom cover 42, that is, it can facilitate the assembly of the bottom cover 42 and the shell 1, and can improve the structural stability of the bottom cover 42 and the shell 1 after assembly.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A two-in-one buzzer speaker, comprising a housing (1), a speaker assembly and a buzzer assembly; characterized in that: The upper part of the shell (1) is provided with a first installation cavity (11) with an upper end opening, and the lower part of the shell (1) is provided with a second installation cavity (12) with a lower end opening, and the speaker assembly and the buzzer assembly are respectively installed in the first installation cavity (11) and the second installation cavity (12); a first sound outlet channel (13) for connecting the first installation cavity (11) and the second installation cavity (12) is vertically provided in the middle of the inner side of the shell (1), and a second sound outlet channel (2) is vertically provided in the middle of the speaker assembly, and the sound waves generated by the buzzer assembly are sequentially emitted from the shell (1) through the second sound outlet channel (2) and the first sound outlet channel (13).

2. The two-in-one buzzer speaker according to claim 1, characterized in that: The loudspeaker assembly comprises a sound diaphragm (31), a voice coil (32), foam (33), a pole piece (34), a permanent magnet (35), a magnetic conductive member (36), a first circuit board (37) and a first conductive pin group (38); the sound diaphragm (31), the voice coil (32), foam (33), the pole piece (34), the permanent magnet (35) and the magnetic conductive member (36) are all annular structures and are coaxially arranged; the second sound outlet channel (2) is formed on the inner side of the sound diaphragm (31), the voice coil (32), foam (33), the pole piece (34), the permanent magnet (35) and the magnetic conductive member (36); the sound diaphragm (31) ) is fixed to the inner edge of the upper end of the first mounting cavity (11), the foam (33), pole piece (34), permanent magnet (35) and magnetic conductive member (36) are arranged in sequence from top to bottom below the sound membrane (31) and fixed to the shell (1), and the voice coil (32) is fixed to the lower end of the sound membrane (31); the first circuit board (37) is fixed to the inner top of the second mounting cavity (12), the first conductive pin group (38) is welded and fixed to the first circuit board (37) and conducts electricity, and the voice coil (32) is electrically connected to the first circuit board (37) via a first connecting line.

3. The two-in-one buzzer speaker according to claim 2, characterized in that: An upwardly bent annular vertical edge (361) is provided at the outer edge of the magnetic conductive component (36); an annular groove (14) is provided at the inner bottom of the first mounting cavity (11); the magnetic conductive component (36) is embedded in the annular groove (14) and the vertical edge (361) is in close contact with the side wall of the annular groove (14); and the lower part of the voice coil (32) is inserted into a gap formed by the vertical edge (361) and the foam (33), the pole piece (34) and the permanent magnet (35).

4. The two-in-one buzzer speaker according to claim 2, characterized in that: An annular step (15) is provided on the inner wall of the upper end of the first installation cavity (11), and the speaker assembly also includes a pressure ring (39), the outer edge of the sound membrane (31) is supported on the annular step (15), the pressure ring (39) is arranged inside the annular step (15) and fixed to the shell (1), and the outer edge of the sound membrane (31) is pressed against the annular step (15) by the pressure ring (39).

5. The two-in-one buzzer speaker according to claim 4, characterized in that: The pressing ring (39) and the shell (1) are circumferentially bonded and fixed by glue.

6. The two-in-one buzzer speaker according to claim 5, characterized in that: The bottom of the outer edge of the annular step (15) is provided with an annular cavity (16) with an upper end opening, and the annular cavity (16) is used for allowing glue to flow in and for bonding and fixing the outer edge of the sound membrane (31) to the annular step (15) after the glue is cured.

7. The two-in-one buzzer speaker according to any one of claims 2 to 6, characterized in that: The buzzer assembly comprises a buzzer plate (41), a bottom cover (42), a second circuit board (43) and a second conductive pin group (44); an annular boss (17) is vertically arranged on the inner top of the second mounting cavity (12); the buzzer plate (41) is bonded and fixed to the lower end of the annular boss (17); the bottom cover (42) is embedded in the opening at the lower end of the second mounting cavity (12) and fixed to the housing (1); the second circuit board (43) is fixed on the bottom cover (42); the buzzer plate (41) is electrically connected to the second circuit board (43); the second conductive pin group (44) is welded and fixed to the second circuit board (43) and conducts electricity; the lower end of the second conductive pin group (44) penetrates the bottom cover (42) and then extends out of the bottom cover (42).

8. The two-in-one buzzer speaker according to claim 7, characterized in that: The upper end surface of the bottom cover (42) is provided with an embedding groove (421), and the second circuit board (43) is embedded in the embedding groove (421) and fixed to the bottom cover (42); a plurality of positioning posts (422) are provided on the inner bottom of the embedding groove (421), and the second circuit board (43) is provided with positioning holes (431) corresponding to the plurality of positioning posts (422) one by one, and each positioning post (422) is vertically inserted into a positioning hole (431) at a corresponding position.

9. The two-in-one buzzer speaker according to claim 7, characterized in that: The bottom cover (42) is provided with through holes (423) corresponding one to one with each first conductive pin (381) in the first conductive pin group (38), and the lower end of each first conductive pin (381) vertically penetrates the through hole (423) at the corresponding position and then protrudes out of the bottom cover (42).

10. The two-in-one buzzer speaker according to claim 9, characterized in that: A limiting block (424) is provided on the outer edge of the bottom cover (42), a limiting groove (18) is provided on the side wall at the lower end of the shell (1), and the limiting block (424) is embedded in the limiting groove (18).

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