Loudspeaker box

Abstract

The invention provides a loudspeaker box, and the loudspeaker box comprises a housing which comprises an upper cover and a lower cover, and the lower cover and the upper cover jointly define an accommodation space; the sound production single body is accommodated and fixed in the accommodating space; the single sounding body comprises a rectangular ring-shaped basin frame, a vibration system fixed on the basin frame and a magnetic circuit system for driving the vibration system to vibrate; the loudspeaker box further comprises a support fixed to the side, close to the lower cover, of the basin frame, a flexible damping part fixed to the side, close to the magnetic circuit system, of the support and steel sheets arranged on the side, away from the vibration system, of the magnetic circuit system at intervals, the magnetic circuit system and the support are fixedly connected through the flexible damping part, and the peripheries of the steel sheets are fixed to the side, away from the basin frame, of the support. According to the loudspeaker box, when the loudspeaker box is limited by the height of the electronic equipment, the steel sheet can be fixed to the lower cover, the steel sheet serves as a part of the shell, and therefore the height space of the loudspeaker box is saved, and the application range of the loudspeaker box is wider.

Description

Technical Field

[0001] The invention belongs to the field of acoustic and electrical technology, and in particular relates to a speaker box used for headphones. Background Art

[0002] A speaker box is a transducer device used to convert electrical signals into sound signals. It is often used in sound-emitting electronic devices, such as common mobile phones, laptops, televisions, etc.

[0003] The speaker box includes a shell, a sound guiding channel formed on the shell, and a sound-generating unit accommodated and fixed in the shell. The sound-generating unit is spaced apart from a part of the shell to form a front sound cavity. The sound guiding channel connects the front sound cavity with the outside and forms a front cavity together with the front sound cavity. The sound-generating unit is also spaced apart from another part of the shell to form a rear cavity together. The sound-generating unit includes a basin frame, a vibration system respectively fixed to the basin frame, and a magnetic circuit system for driving the vibration system to vibrate.

[0004] Although the speaker box in the related art has been miniaturized, it is still highly restricted by the electronic equipment in practical applications, 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 art is restricted by the height of the electronic device in practical application, resulting in a narrow application range.

[0006] The present invention is implemented by providing a speaker box, which includes: 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, the sound-generating unit is accommodated and fixed in the accommodation space and divides the accommodation space into a front cavity and a rear cavity; the sound-generating unit includes 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 driving the vibration system to vibrate, and the magnetic circuit system is closer to the lower cover than the vibration system; The speaker box is also fixed to a bracket on a side of the basin close to the lower cover and arranged around the magnetic circuit system, a flexible shock-absorbing component fixed to a side of the bracket close to the magnetic circuit system, and a steel sheet spaced apart on a side of the magnetic circuit system away from the vibration system, the flexible shock-absorbing component 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.

[0007] Preferably, the lower cover is provided with a through hole penetrating therethrough and directly facing the steel sheet; a side of the steel sheet away from the bracket is fixed to the lower cover and completely covers the through hole.

[0008] Preferably, the steel sheet is spaced apart from the lower cover; 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.

[0009] Preferably, the annular steel sheet includes an annular main body portion, an annular fixing portion formed by bending and extending inward at one end of the main body portion close to the lower cover, and an annular extension portion formed by bending and extending outward at 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.

[0010] Preferably, the steel sheet and the annular steel sheet are an integrally formed structure.

[0011] Preferably, a plurality of leakage holes are arranged at intervals in the main body.

[0012] Preferably, 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 clamp and a magnet fixed to the lower clamp, 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 clamp, 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 clamp; the two flexible shock absorbers are fixedly connected to the lower clamp, the secondary magnet and the opposite sides of the side pole core respectively on one side away from the basin frame.

[0013] Preferably, 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 a side of the elastic member away from the diaphragm, and the other end of the frame is attached and fixed to the diaphragm.

[0014] Preferably, the flexible shock absorbing members include two, and the two flexible shock absorbing members are respectively fixed on opposite sides of the bracket.

[0015] Preferably, the bracket includes a rectangular annular portion spaced apart from the basin frame, and a supporting portion formed by opposite sides of the annular portion extending respectively in the direction of the basin frame, 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.

[0016] Compared with the related art, the speaker box of the present invention can achieve free vibration of the magnetic circuit system under the driving force of the vibration system by arranging a flexible shock-absorbing part between the bracket and the magnetic circuit system. At the same time, a steel sheet is arranged on the side of the bracket close to the lower cover. In this way, when the speaker box is restricted by the height of the electronic equipment, the steel sheet can be fixed to the lower cover so that the steel sheet can be used as a part of the shell, thereby saving the height space of the speaker box and extending its application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a first speaker box provided by an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the structural decomposition of a first speaker box provided by an embodiment of the present invention.

[0020] Figure 3 yes Figure 1 Section view along line AA.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of a second speaker box provided by an embodiment of the present invention.

[0022] Figure 5 It is a schematic diagram of the structural decomposition of a second speaker box provided by an embodiment of the present invention.

[0023] Figure 6 yes Figure 4 Cross-sectional view along line BB.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of a third speaker box provided by an embodiment of the present invention without a shell installed.

[0025] 100, speaker box; 1, shell; 11, upper cover; 111, support wall; 12, lower cover; 121, through hole; 13, sound guide channel; 2, sound unit; 21, basin frame; 22, vibration system; 221, diaphragm; 222, voice coil; 23, magnetic circuit system; 231, lower clamping plate; 232, magnetic steel; 2321, main magnetic steel; 2322, auxiliary magnetic steel; 233, center pole core; 23 4. First center magnet; 235. Second center magnet; 236. Side pole core; 24. Elastic member; 25. Auxiliary diaphragm; 26. Skeleton; 3. Flexible shock-absorbing member; 4. Steel sheet; 5. Bracket; 51. Annular portion; 52. Support portion; 6. Ring-shaped steel sheet; 61. Main body; 611. Leakage hole; 62. Fixing portion; 63. Extension portion; 10. Front acoustic cavity; 20. Front cavity; 30. Rear cavity. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 intended to limit the present invention.

[0027] Embodiment 1 The embodiment of the present invention provides a speaker box 100, Figures 1 to 3 As shown, it includes a shell 1, a sound-emitting unit 2, a flexible shock-absorbing component 3, a steel sheet 4 and a bracket 5.

[0028] The shell 1 includes an upper cover 11, a sound guiding channel 13 formed on the upper cover 11, and a lower cover 12 which is covered on the upper cover 11 and together with the upper cover 11 forms a receiving space; a support wall 111 which protrudes and extends toward the lower cover 12 is provided on one side of the upper cover 11 close to the lower cover 12.

[0029] The sound-emitting unit 2 is accommodated and fixed in the accommodation space, specifically, fixedly supported on the supporting wall 111; the sound-emitting unit 2 and the upper cover 11 are spaced apart and together form a front sound cavity 10, the sound-guiding channel 13 connects the front sound cavity 10 with the outside and forms a front cavity 20 together with the front sound cavity 10; the sound-emitting unit 2 and the lower cover 12 are spaced apart and together form a rear cavity 30.

[0030] The sound unit 2 includes a basin frame 21 in a rectangular ring shape and supported by a supporting wall 111 , a vibration system 22 fixed to the basin frame 21 , and a magnetic circuit system 23 driving the vibration system 22 to vibrate. The magnetic circuit system 23 is closer to the lower cover 12 than the vibration system 22 .

[0031] The vibration system 22 includes a diaphragm 221 fixed to the frame 21 and a voice coil 222 for driving the diaphragm 221 to vibrate.

[0032] 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 arranged around the main magnet 2321 and spaced from the main magnet 2321 to form a magnetic gap, and the voice coil 222 is inserted and suspended in the magnetic gap; the magnetic circuit system 23 also includes a center pole core 233 stacked and fixed on the side of the main magnet 2321 away from the lower clamping plate 231, a first center magnet 234 stacked and fixed on the side of the center pole core 233 away from the main magnet 2321, a second center magnet 235 stacked and fixed on the side of the first center magnet 234 away from the center 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.

[0033] The auxiliary magnetic steels 2322 include four auxiliary magnetic steels 2322 , and the four auxiliary magnetic steels 2322 are respectively disposed on four side surfaces of the main magnetic steel 2321 and the magnetic steel 232 .

[0034] The sound-emitting unit 2 further includes an elastic member 24, an auxiliary diaphragm 25 and a frame 26. One end of the elastic member 24 is fixed to the basin frame 21, and the other end of the elastic member 24 is fixed to one end of the frame 26. The auxiliary diaphragm 25 is attached to and fixed on the side of the elastic member 24 away from the diaphragm 221. The other end of the frame 26 is attached to and fixed to the diaphragm 221 and is fixedly connected to the voice coil 222. In this embodiment, the elastic member 24 and the auxiliary diaphragm 25 each include two elastic members 24, and the two elastic members 24 are fixed to opposite sides of the basin frame 21, respectively.

[0035] The bracket 5 is fixed to one side of the basin frame 21 close to the lower cover 12 and is disposed around the magnetic circuit system 23. The flexible damping member 3 is fixed to one side of the bracket 5 close to the magnetic circuit system 23 and fixedly connects the magnetic circuit system 23 and the bracket 5.

[0036] In this embodiment, the two flexible shock absorbers 3 are respectively fixed on opposite sides of the bracket 5, and the side of the flexible shock absorber 3 away from the bracket 5 is fixedly connected to the magnetic circuit system 23. Specifically, the sides of the two flexible shock absorbers 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 magnetic steel 2322 close to the bracket 5, and the side of the side pole core 236 close to the bracket 5.

[0037] The flexible shock absorbing member 3 is a specific elastic and insulating component, such as an insulating spring or spring, an elastic plastic block, an elastic rubber block, etc.

[0038] The steel sheet 4 is spaced apart on a side of the magnetic circuit system 23 away from the vibration system 22 , and a periphery of the steel sheet 4 is fixed to a side of the bracket 5 close to the lower cover 12 .

[0039] In addition, the bracket 5 includes an annular portion 51 that is rectangular and spaced apart from the basin frame 21, and a support portion 52 formed by the opposite sides of the annular portion 51 extending toward the basin frame 21, and the support portion 52 extends to the basin frame 21 and is fixedly connected to the basin frame 21; the steel sheet 4 is fixed to the annular portion 51, and the two flexible shock-absorbing members 3 are respectively fixed to the two support portions 52 of the bracket 5.

[0040] In this embodiment, the lower cover 12 is provided with a through hole 121 penetrating therethrough and directly facing the steel sheet 4 ; a 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 .

[0041] The speaker box 100 of this embodiment is provided with a flexible shock-absorbing member 3 between the bracket 5 and the magnetic circuit system 23, so that 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 provided on the side of the bracket 5 close to the lower cover 12, so that when the speaker box 100 is subject to the height restriction of the electronic device, the steel sheet 4 can be fixed to the lower cover 12, so that the steel sheet 4 can be used as a part of the shell 1, thereby saving the height space of the speaker box 100 and making its application range wider, that is, the lower cover 12 is provided with a through hole 121 passing through it and facing 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, so that the steel sheet 4 can be used as a part of the shell 1, thereby saving the height space of the speaker box 100.

[0042] Embodiment 2 Combination Figures 4 to 6 As shown, the present embodiment is different from the first embodiment in that the lower cover 12 is not provided with a through hole 121 therethrough, and the steel sheet 4 is spaced apart from the lower cover 12. Specifically, the speaker box 100 further includes an annular steel sheet 6 disposed around the magnetic circuit system 23, the annular steel sheet 6 is located on a side of the bracket 5 away from the magnetic circuit system 23 and spaced apart from the bracket 5, the annular steel sheet 6 is provided with a plurality of leakage holes 611 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 together wrap the magnetic circuit system 23.

[0043] Among them, the annular steel sheet 6 includes an annular main body portion 61, an annular fixing portion 62 formed by bending inward and extending from one end of the main body portion 61 close to the lower cover 12, and an annular extension portion 63 formed by bending outward and extending from one end of the main body portion 61 away from the lower cover 12. The fixing portion 62 bends inward and extends to the periphery of the steel sheet 4 and is fixedly connected to the steel sheet 4.

[0044] A plurality of leakage holes 611 are provided at intervals in the main body 61 .

[0045] By providing the annular steel sheet 6 and cooperating with the steel sheet 4 to wrap the magnetic circuit system 23, the magnetic circuit system 23 can be encapsulated inside the core of the speaker box 100 (the sound unit 2) to reduce its application conditions. At the same time, space (length, width, and height) can be reserved according to the outer dimensions of the core. There is no need to consider the space required for the vibration of the shock absorbing system formed by the flexible shock absorbing member 3, thereby avoiding the risk of interference with other components during the vibration stroke of the shock absorbing system.

[0046] In addition, for scenarios where bass powder (sound-absorbing particles) need to be filled to improve acoustic performance, the steel sheet 4 and the annular steel sheet 6 can effectively separate the magnetic circuit system 23 from the bass powder, thereby preventing the bass powder from being frictionally broken due to the vibration of the magnetic circuit system 23, thereby reducing the acoustic performance of the speaker box 100, and the leakage hole 611 can also balance the sound pressure in the inner cavity of the sound-emitting unit 2.

[0047] Embodiment 3 Combination Figure 7 As shown, this embodiment is different from the second embodiment in that the steel sheet 4 and the annular steel sheet 6 are an integrally formed structure, that is, the steel sheet 4 and the main body 61 of the annular steel sheet 6 are integrally formed, and the annular steel sheet 6 does not have an extension portion 63.

[0048] By designing the steel sheet 4 and the annular steel sheet 6 into an integrally formed structure, the space required for the installation of the steel sheet 4 and the annular steel sheet 6 can be reduced. For scenes where bass powder needs to be filled, the filling of bass powder can be maximized. At the same time, the width of the opposite sides of the bracket 5 can be reduced. When the two auxiliary diaphragms 25 are located on the opposite sides of the bracket 5, the height space is released to provide vibration space for the auxiliary diaphragms 25, and the assembly is simpler and the cost is reduced.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A speaker box, include: 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 also includes a bracket fixed to the side of the basin close to the lower cover and arranged around the magnetic circuit system, a flexible shock-absorbing component fixed to the side of the bracket close to the magnetic circuit system, and a steel sheet spaced apart on the side of the magnetic circuit system away from the vibration system, the flexible shock-absorbing component fixedly connects the magnetic circuit system to the bracket, and the periphery of the steel sheet is fixed to the side of the bracket away from the basin.

2. The speaker box according to claim 1, It is characterized in that The lower cover is provided with a through hole which passes through it and is directly opposite to 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.

3. The speaker box according to claim 1, It is characterized in that The steel sheet is spaced apart from the lower cover; 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.

4. The speaker box according to claim 3, It is 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.

5. The speaker box according to claim 4, It is characterized in that The steel sheet and the annular steel sheet are an integrally formed structure.

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

7. The speaker box according to claim 1, It is 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.

8. The speaker box according to claim 7, It is 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.

9. The speaker box according to claim 1, It is 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.

10. The speaker box according to claim 9, It is 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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