A loudspeaker box

Abstract

The present invention provides a speaker box, comprising: a housing including an upper cover and a lower cover, the lower cover and the upper cover jointly enclosing a receiving space; a sounding element, the sounding element being received and fixed in the receiving space; the sounding element including a rectangular ring-shaped chassis, a vibration system respectively fixed to the chassis, and a magnetic circuit system for driving the vibration system to vibrate; the speaker box further includes a bracket fixed to one side of the chassis close to the lower cover, a flexible shock absorber fixed to one side of the bracket close to the magnetic circuit system, and a steel sheet disposed at intervals on one side of the magnetic circuit system away from the vibration system, the flexible shock absorber fixedly connecting the magnetic circuit system and the bracket, and the periphery of the steel sheet being fixed to one side of the bracket away from the chassis. In the speaker box of the present invention, when it is restricted by the height of an electronic device, the steel sheet can be fixed to the lower cover to use the steel sheet as a part of the housing, thereby saving the height space of the speaker box and making its application range wider.

Description

Technical Field

[0001] The present invention belongs to the technical field of electroacoustic technology, and particularly relates to a speaker box applied to headphones. Background Art

[0002] A speaker box is a transducer device for converting an electrical signal into an acoustic signal, and is often used in electronic devices that emit sound, such as common mobile phones, laptop computers, televisions, etc.

[0003] The speaker box includes a housing, a sound guiding channel formed on the housing, and a sounding element housed and fixed in the housing. The sounding element is spaced apart from a part of the housing to form a front sound cavity. The sound guiding channel communicates the front sound cavity with the outside and forms a front cavity together with the front sound cavity. The sounding element is also spaced apart from another part of the housing and together encloses a rear cavity. Among them, the sounding element includes a chassis, a vibration system respectively fixed to the chassis, and a magnetic circuit system for driving the vibration system to vibrate.

[0004] Although the speaker box in the related technology has achieved miniaturization, in its actual application, it is still restricted by the height of the electronic device, resulting in a narrow application range. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to provide a speaker box to solve the problem that the speaker box in the related technology is restricted by the height of the electronic device in actual application, resulting in a narrow application range.

[0006] The present invention is implemented as follows. A speaker box is provided, which includes:

[0007] A housing, the housing includes an upper cover and a lower cover covering the upper cover, and the lower cover and the upper cover together enclose a receiving space;

[0008] A sounding element, the sounding element is housed and fixed in the receiving space and divides the receiving space into a front cavity and a rear cavity; the sounding element includes a chassis in a rectangular ring shape and supported on the upper cover, a vibration system respectively fixed to the chassis, and a magnetic circuit system for driving the vibration system to vibrate, and the magnetic circuit system is closer to the lower cover than the vibration system;

[0009] The speaker box also includes a bracket fixed to the side of the chassis close to the lower cover and surrounding the magnetic circuit system, a flexible shock absorber fixed to the side of the bracket close to the magnetic circuit system, and a steel sheet spaced apart from the side of the magnetic circuit system away from the vibration system. The flexible shock absorber fixedly connects the magnetic circuit system with the bracket, and the periphery of the steel sheet is fixed to the side of the bracket away from the chassis.

[0010] Preferably, the lower cover is provided with a through hole penetrating therethrough and facing the steel sheet; one side of the steel sheet away from the bracket is fixed to the lower cover and completely covers the through hole.

[0011] Preferably, the steel sheet is spaced from the lower cover; the speaker box further includes an annular steel sheet disposed around the magnetic circuit system, the annular steel sheet is provided with a plurality of leakage holes penetrating therethrough, the annular steel sheet is located on a side of the bracket away from the magnetic circuit system and is spaced from the bracket, one end of the annular steel sheet close to the lower cover is fixedly connected to the periphery of the steel sheet, and the annular steel sheet and the steel sheet jointly wrap the magnetic circuit system.

[0012] Preferably, the annular steel sheet includes an annular main body portion, an annular fixing portion formed by bending and extending inward from one end of the main body portion close to the lower cover, and an annular extending portion formed by bending and extending outward from one end of the main body portion away from the lower cover, and the fixing portion extends to the periphery of the steel sheet and is fixedly connected to the steel sheet.

[0013] Preferably, the steel sheet and the annular steel sheet are of an integrally formed structure.

[0014] Preferably, the plurality of leakage holes are spaced apart on the main body portion.

[0015] Preferably, the vibration system includes a diaphragm fixed to the chassis and a voice coil for driving the diaphragm to vibrate; the magnetic circuit system includes a lower yoke and a magnet fixed to the lower yoke, the magnet includes a main magnet and an auxiliary magnet disposed around the main magnet and spaced from the main magnet to form a magnetic gap, and the voice coil is inserted and suspended in the magnetic gap; the magnetic circuit system further includes a center pole core stacked and fixed on a side of the main magnet away from the lower yoke, a first center magnet stacked and fixed on a side of the center pole core away from the main magnet, a second center magnet stacked and fixed on a side of the first center magnet away from the center pole core, and a side pole core stacked and fixed on a side of the auxiliary magnet away from the lower yoke; one sides of the two flexible shock-absorbing members away from the chassis are respectively fixedly connected to opposite sides of the lower yoke, the auxiliary magnet, and the side pole core.

[0016] Preferably, the sounding element further includes an elastic member, an auxiliary diaphragm, and a skeleton, one end of the elastic member is fixed to the chassis, the other end of the elastic member is fixed to one end of the skeleton, the auxiliary diaphragm is fixedly attached to a side of the elastic member away from the diaphragm, and the other end of the skeleton is fixedly attached to the diaphragm.

[0017] Preferably, there are two flexible shock-absorbing members, and the two flexible shock-absorbing members are respectively fixed to opposite sides of the bracket.

[0018] Preferably, the bracket includes an annular portion that is rectangular and spaced from the basin frame, and support portions that extend from opposite sides of the annular portion toward the basin frame, and the support portions extend to the basin frame and are fixedly connected to the basin frame; the steel sheet is fixed to the annular portion, and the two flexible shock-absorbing members are respectively fixed to the two support portions of the bracket.

[0019] Compared with the related art, in the loudspeaker box of the present invention, by arranging flexible shock-absorbing members between the bracket and the magnetic circuit system, the magnetic circuit system can achieve free vibration under the driving force of the vibration system. At the same time, a steel sheet is arranged on one side of the bracket close to the lower cover. In this way, when the loudspeaker box is restricted by the height of the electronic device, the steel sheet can be fixed to the lower cover to use the steel sheet as a part of the housing, thereby saving the height space of the loudspeaker box and making its application range wider. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic perspective view of the first loudspeaker box provided by an embodiment of the present invention.

[0022] Figure 2 is an exploded schematic view of the structure of the first loudspeaker box provided by an embodiment of the present invention.

[0023] Figure 3 is Figure 1 a cross-sectional view taken along line A-A in

[0024] Figure 4 is a schematic perspective view of the second loudspeaker box provided by an embodiment of the present invention.

[0025] Figure 5 is an exploded schematic view of the structure of the second loudspeaker box provided by an embodiment of the present invention.

[0026] Figure 6 is Figure 4 a cross-sectional view taken along line B-B in

[0027] Figure 7 is a schematic perspective view of the third loudspeaker box without a housing provided by an embodiment of the present invention.

[0028] 100, loudspeaker box; 1, housing; 11, upper cover; 111, support wall; 12, lower cover; 121, through hole; 13, sound guiding channel; 2, sounding element; 21, chassis; 22, vibration system; 221, diaphragm; 222, voice coil; 23, magnetic circuit system; 231, lower yoke; 232, magnet; 2321, main magnet; 2322, auxiliary magnet; 233, center pole core; 234, first center magnet; 235, second center magnet; 236, edge pole core; 24, elastic member; 25, auxiliary diaphragm; 26, skeleton; 3, flexible shock absorber; 4, steel sheet; 5, bracket; 51, annular portion; 52, support portion; 6, annular steel sheet; 61, main body portion; 611, leakage hole; 62, fixing portion; 63, extension portion; 10, front sound cavity; 20, front cavity; 30, rear cavity. Detailed implementation manners

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Embodiment 1

[0031] An embodiment of the present invention provides a loudspeaker box 100, which includes Figures 1 to 3 as shown, and includes a housing 1, a sounding element 2, a flexible shock absorber 3, a steel sheet 4 and a bracket 5.

[0032] Among them, the housing 1 includes an upper cover 11, a sound guiding channel 13 formed in the upper cover 11, and a lower cover 12 covering the upper cover 11 and jointly enclosing a receiving space with the upper cover 11; a support wall 111 protruding and extending downward is provided on one side of the upper cover 11 close to the lower cover 12.

[0033] The sounding element 2 is received and fixed in the receiving space, specifically fixed and supported on the support wall 111; the sounding element 2 is spaced from the upper cover 11 and jointly encloses a front sound cavity 10, and the sound guiding channel 13 communicates the front sound cavity 10 with the outside and forms a front cavity 20 together with the front sound cavity 10; the sounding element 2 is spaced from the lower cover 12 and jointly encloses a rear cavity 30.

[0034] The sounding element 2 includes a chassis 21 in a rectangular ring shape and supported on the support wall 111, a vibration system 22 respectively fixed to the chassis 21, and a magnetic circuit system 23 for driving the vibration system 22 to vibrate. The magnetic circuit system 23 is closer to the lower cover 12 than the vibration system 22.

[0035] The vibration system 22 includes a diaphragm 221 fixed to the chassis 21 and a voice coil 222 for driving the diaphragm 221 to vibrate.

[0036] The magnetic circuit system 23 includes a lower clamping plate 231 and a magnet 232 fixed to the lower clamping plate 231. The magnet 232 includes a main magnet 2321 and an auxiliary magnet 2322 disposed around the main magnet 2321 and spaced from the main magnet 2321 to form a magnetic gap. The voice coil 222 is inserted and suspended in the magnetic gap. The magnetic circuit system 23 further includes a central pole core 233 stacked and fixed on the side of the main magnet 2321 away from the lower clamping plate 231, a first central magnet 234 stacked and fixed on the side of the central pole core 233 away from the main magnet 2321, a second central magnet 235 stacked and fixed on the side of the first central magnet 234 away from the central pole core 233, and a side pole core 236 stacked and fixed on the side of the auxiliary magnet 2322 away from the lower clamping plate 231.

[0037] There are four auxiliary magnets 2322, and the four auxiliary magnets 2322 are respectively disposed on the four side surfaces of the magnet 232 of the main magnet 2321.

[0038] The sounding element 2 further includes an elastic member 24, an auxiliary diaphragm 25, and a skeleton 26. One end of the elastic member 24 is fixed to the speaker frame 21, and the other end of the elastic member 24 is fixed to one end of the skeleton 26. The auxiliary diaphragm 25 is fixedly attached to the side of the elastic member 24 away from the diaphragm 221. The other end of the skeleton 26 is fixedly attached to the diaphragm 221 and fixedly connected to the voice coil 222. In this embodiment, there are two elastic members 24 and two auxiliary diaphragms 25 respectively. The two elastic members 24 are respectively fixed to opposite sides of the speaker frame 21.

[0039] The bracket 5 is fixed to the side of the speaker frame 21 close to the lower cover 12 and disposed around the magnetic circuit system 23. The flexible shock-absorbing member 3 is fixed to the side of the bracket 5 close to the magnetic circuit system 23 and fixedly connects the magnetic circuit system 23 and the bracket 5.

[0040] In this embodiment, there are two flexible shock-absorbing members 3. The two flexible shock-absorbing members 3 are respectively fixed to opposite sides of the bracket 5. The side of the flexible shock-absorbing member 3 away from the bracket 5 is fixedly connected to the magnetic circuit system 23. Specifically, the sides of the two flexible shock-absorbing members 3 away from the bracket 5 are respectively fixedly connected to the side of the lower clamping plate 231 close to the bracket 5, the side of the auxiliary magnet 2322 close to the bracket 5, and the side of the side pole core 236 close to the bracket 5.

[0041] The flexible shock-absorbing member 3 is a specific elastic and insulating component, such as an insulating elastic sheet or spring, an elastic plastic block, an elastic rubber block, etc.

[0042] The steel sheet 4 is disposed at intervals on the side of the magnetic circuit system 23 away from the vibration system 22. The periphery of the steel sheet 4 is fixed to the side of the bracket 5 close to the lower cover 12.

[0043] In addition, the bracket 5 includes an annular portion 51 that is rectangular and disposed at an interval from the basin frame 21, and support portions 52 that extend from opposite sides of the annular portion 51 toward the basin frame 21. The support portions 52 extend to the basin frame 21 and are fixedly connected to the basin frame 21; the steel sheet 4 is fixed to the annular portion 51, and two flexible shock-absorbing members 3 are respectively fixed to the two support portions 52 of the bracket 5.

[0044] In this embodiment, the lower cover 12 is provided with a through hole 121 that penetrates therethrough and faces the steel sheet 4; the side of the steel sheet 4 away from the bracket 5 is fixed to the lower cover 12 and completely covers the through hole 121.

[0045] In the loudspeaker box 100 of this embodiment, by providing the flexible shock-absorbing member 3 between the bracket 5 and the magnetic circuit system 23, the magnetic circuit system 23 can achieve free vibration under the driving force of the vibration system 22; at the same time, a steel sheet 4 is also provided on the side of the bracket 5 close to the lower cover 12. In this way, when the loudspeaker box 100 is restricted by the height of the electronic device, the steel sheet 4 can be fixed to the lower cover 12, and the steel sheet 4 can be used as a part of the housing 1, thereby saving the height space of the loudspeaker box 100 and making its application range wider. That is, the lower cover 12 is provided with a through hole 121 that penetrates therethrough and faces the steel sheet 4; the side of the steel sheet 4 away from the bracket 5 is fixed to the lower cover 12 and completely covers the through hole 121 to realize using the steel sheet 4 as a part of the housing 1, thereby saving the height space of the loudspeaker box 100.

[0046] Embodiment Two

[0047] Combined with Figures 4 to 6 As shown, the difference between this embodiment and Embodiment One is that the lower cover 12 is not provided with a through hole 121 that penetrates therethrough, and the steel sheet 4 is disposed at an interval from the lower cover 12. Specifically, the loudspeaker box 100 further includes an annular steel sheet 6 disposed around the magnetic circuit system 23. The annular steel sheet 6 is located on the side of the bracket 5 away from the magnetic circuit system 23 and is disposed at an interval from the bracket 5. The annular steel sheet 6 is provided with a plurality of leakage holes 611 that penetrate therethrough. One end of the annular steel sheet 6 close to the lower cover 12 is fixedly connected to the periphery of the steel sheet 4, and the annular steel sheet 6 and the steel sheet 4 jointly wrap the magnetic circuit system 23.

[0048] Among them, the annular steel sheet 6 includes a ring-shaped main body portion 61, a ring-shaped fixing portion 62 formed by bending and extending inward from one end of the main body portion 61 close to the lower cover 12, and a ring-shaped extending portion 63 formed by bending and extending outward from one end of the main body portion 61 away from the lower cover 12. The fixing portion 62 bends and extends inward to the periphery of the steel sheet 4 and is fixedly connected to the steel sheet 4.

[0049] The plurality of leakage holes 611 are spaced apart from each other on the main body portion 61.

[0050] By setting the annular steel sheet 6 and making it cooperate with the steel sheet 4 to wrap the magnetic circuit system 23 together, the magnetic circuit system 23 can be encapsulated inside the core of the speaker box 100 (the sounding element 2), so as to reduce its application conditions. At the same time, only the space (length, width, and height) needs to be reserved according to the outer shape size of the core, without considering the space required for the vibration of the damping system formed by the flexible damping member 3, thus avoiding the risk of interference with other components during the vibration stroke of the damping system.

[0051] In addition, for the scenario where bass powder (sound-absorbing particles) needs to be filled to improve the acoustic performance, the steel sheet 4 and the annular steel sheet 6 can effectively separate the magnetic circuit system 23 from the bass powder, preventing the bass powder from rubbing and breaking due to the vibration of the magnetic circuit system 23, thereby reducing the acoustic performance of the speaker box 100. Moreover, the leakage hole 611 can also balance the sound pressure in the inner cavity of the sounding element 2.

[0052] Embodiment Three

[0053] Combined with Figure 7 As shown, the difference between this embodiment and Embodiment Two is that the steel sheet 4 and the annular steel sheet 6 are of an integrally formed structure, that is, the main body 61 of the steel sheet 4 and the annular steel sheet 6 is integrally formed, and the annular steel sheet 6 has no extension 63.

[0054] By designing the steel sheet 4 and the annular steel sheet 6 into an integrally formed structure, the space required for installing the steel sheet 4 and the annular steel sheet 6 can be reduced. For the scenario where bass powder needs to be filled, the filling of bass powder can be maximized. At the same time, the width of the two opposite sides of the bracket 5 can also be reduced, so that when two auxiliary diaphragms 25 are located on the two opposite sides of the bracket 5, the height space can be released to provide vibration space for the auxiliary diaphragms 25, and the assembly is simpler and the cost is reduced.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A speaker box, comprising: A shell, the shell comprising an upper cover and a lower cover arranged on the upper cover, wherein the lower cover and the upper cover together enclose a receiving space; A sound-generating unit, wherein the sound-generating unit is received and fixed in the receiving space and the receiving space is divided into a front cavity and a rear cavity; the sound-generating unit comprises a basin frame in a rectangular ring shape and supported on the upper cover, a vibration system respectively fixed to the basin frame, and a magnetic circuit system for driving the vibration system to vibrate, wherein the magnetic circuit system is closer to the lower cover than the vibration system; characterized in that: The speaker box further comprises a bracket fixed to a side of the basin frame close to the lower cover and arranged around the magnetic circuit system, a flexible shock absorbing member fixed to a side of the bracket close to the magnetic circuit system, and a steel sheet spaced apart and arranged on a side of the magnetic circuit system away from the vibration system, wherein the flexible shock absorbing member fixedly connects the magnetic circuit system to the bracket, and the periphery of the steel sheet is fixed to a side of the bracket away from the basin frame; The lower cover is provided with a through hole penetrating therethrough and directly facing the steel sheet; the side of the steel sheet away from the bracket is fixed to the lower cover and completely covers the through hole; The speaker box also includes an annular steel sheet arranged around the magnetic circuit system, the annular steel sheet is provided with a plurality of leakage holes running through it, the annular steel sheet is located on a side of the bracket away from the magnetic circuit system and is spaced apart from the bracket, one end of the annular steel sheet close to the lower cover is fixedly connected to the periphery of the steel sheet, and the annular steel sheet and the steel sheet together wrap the magnetic circuit system.

2. The speaker box according to claim 1, characterized in that The annular steel sheet includes an annular main body portion, an annular fixing portion formed by bending inward and extending from one end of the main body portion close to the lower cover, and an annular extending portion formed by bending outward and extending from one end of the main body portion away from the lower cover, wherein the fixing portion extends to the periphery of the steel sheet and is fixedly connected to the steel sheet.

3. The speaker box according to claim 2, characterized in that: The steel sheet and the annular steel sheet are an integrally formed structure.

4. The speaker box according to claim 2, characterized in that: A plurality of leakage holes are arranged at intervals in the main body.

5. The speaker box according to claim 1, characterized in that: The vibration system includes a diaphragm fixed to the basin frame and a voice coil driving the diaphragm to vibrate; the magnetic circuit system includes a lower clamping plate and a magnet fixed to the lower clamping plate, the magnet includes a main magnet and a secondary magnet arranged around the main magnet and spaced from the main magnet to form a magnetic gap, and the voice coil is inserted and suspended in the magnetic gap; the magnetic circuit system also includes a center pole core stacked and fixed to the side of the main magnet away from the lower clamping plate, a first center magnet stacked and fixed to the side of the center pole core away from the main magnet, a second center magnet stacked and fixed to the side of the first center magnet away from the center pole core, and a side pole core stacked and fixed to the side of the secondary magnet away from the lower clamping plate; the side of the flexible shock absorber away from the basin frame is respectively fixedly connected to the lower clamping plate, the secondary magnet and the side pole core.

6. The speaker box according to claim 5, characterized in that: The sound unit also includes an elastic member, an auxiliary diaphragm and a frame, one end of the elastic member is fixed to the basin frame, the other end of the elastic member is fixed to one end of the frame, the auxiliary diaphragm is attached and fixed to the side of the elastic member away from the diaphragm, and the other end of the frame is attached and fixed to the diaphragm and fixedly connected to the voice coil.

7. The speaker box according to claim 1, characterized in that: The flexible shock absorbing members include two, and the two flexible shock absorbing members are respectively fixed on opposite sides of the bracket.

8. The speaker box according to claim 7, characterized in that: The bracket includes a rectangular annular portion spaced apart from the basin frame, and a supporting portion formed by two opposite sides of the annular portion extending toward the basin frame, wherein the supporting portion extends to the basin frame and is fixedly connected to the basin frame; the steel sheet is fixed to the annular portion, and the two flexible shock-absorbing members are respectively fixed to the two supporting portions of the bracket.

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