Loudspeaker cabinet

Abstract

This invention provides a loudspeaker enclosure, comprising a housing and a loudspeaker unit mounted on one side of the housing. The loudspeaker unit includes a frame, a diaphragm and a magnetic circuit system respectively supported by the frame, and a voice coil for driving the diaphragm to vibrate and produce sound. The housing is located on the side of the magnetic circuit system facing away from the diaphragm. The diaphragm, frame, magnetic circuit system, and housing together form a closed rear acoustic cavity. The loudspeaker enclosure provided by this invention can be made larger in both length and width directions, effectively improving the acoustic performance of the loudspeaker enclosure.

Description

[Technical Field]

[0001] This utility model relates to the field of electroacoustic conversion technology, and in particular to a loudspeaker box. [Background Technology]

[0002] Speaker enclosures are commonly used sound-generating devices in electronic devices. A speaker enclosure typically includes a housing structure and a sound-generating unit housed within the housing structure. In related technologies, speaker enclosures include a top cover, a bottom cover assembled with the top cover to form a receiving space, and a sound-generating unit housed within this receiving space. In this type of speaker enclosure, the sound-generating unit is completely housed within the receiving space enclosed by the top and bottom covers. The top cover has a sound hole for sound emission, which results in the speaker enclosure having a certain amount of space occupied by the covers in both the length and width directions. Therefore, the acoustic performance of the speaker enclosure within a certain size requirement is not optimal.

[0003] Therefore, it is necessary to provide a new speaker enclosure to solve the above-mentioned technical problems. [Utility Model Content]

[0004] The purpose of this invention is to provide a speaker enclosure with excellent acoustic performance in a small-sized environment.

[0005] To achieve the above objectives, this utility model provides a loudspeaker enclosure, which includes a housing and a loudspeaker unit mounted on one side of the housing. The loudspeaker unit includes a frame, a diaphragm and a magnetic circuit system respectively supported on the frame, and a voice coil that drives the diaphragm to vibrate and produce sound. The housing is located on the side of the magnetic circuit system away from the diaphragm. The diaphragm, the frame, the magnetic circuit system, and the housing together form a closed rear acoustic cavity.

[0006] Preferably, the magnetic circuit system includes a magnetic yoke, a central magnet fixed to the magnetic yoke, and a secondary magnet. The secondary magnet is arranged around the central magnet and is spaced apart from the central magnet to form a magnetic gap. The secondary magnet is an annular magnet. The diaphragm, the frame, the secondary magnet, the magnetic yoke, and the housing together form the closed rear acoustic cavity.

[0007] Preferably, the loudspeaker unit has an internal acoustic cavity, the housing surrounds and forms a receiving cavity, the magnetic yoke has at least one connecting hole, and the acoustic cavity and the receiving cavity are connected through the connecting hole to form a closed rear acoustic cavity.

[0008] Preferably, there are four connecting holes, the magnetic yoke is rectangular, and each connecting hole extends from the minor axis of the magnetic yoke to the major axis of the magnetic yoke.

[0009] Preferably, the position of the connecting hole corresponds to the position of the magnetic gap.

[0010] Preferably, the loudspeaker unit further includes an insert that passes through the magnetic circuit system, a conductive terminal disposed within the insert, and a circuit board fixed to the insert and electrically connected to the conductive terminal. The voice coil has a voice coil lead, and the circuit board is electrically connected to the voice coil lead.

[0011] Preferably, the circuit board includes a fixing portion fixed to the conductive terminal, an elastic portion extending from both sides of the fixing portion, and a pad portion connected to the elastic portion, wherein the voice coil lead is soldered and fixed to the pad portion.

[0012] Preferably, the elastic portion includes a horizontally extending first connecting portion and a second connecting portion that bends and extends from the first connecting portion along the vibration direction of the diaphragm, the fixing portion is connected to the first connecting portion, and the pad portion is connected to the second connecting portion.

[0013] Preferably, the magnetic circuit system further includes a first pole core stacked on the central magnet and a second pole core stacked on the auxiliary magnet, and the insert passes through the magnetic yoke, the central magnet, and the first pole core.

[0014] Preferably, the voice coil has a recessed portion at a position relative to the second pole core.

[0015] Compared with related technologies, this utility model provides a loudspeaker enclosure, which includes a housing and a loudspeaker unit mounted on one side of the housing. The loudspeaker unit includes a frame, a diaphragm and a magnetic circuit system respectively supported by the frame, and a voice coil that drives the diaphragm to vibrate and produce sound. The housing is located on the side of the magnetic circuit system away from the diaphragm. The diaphragm, the frame, the magnetic circuit system, and the housing together form a closed rear acoustic cavity. The side of the loudspeaker unit of this utility model is self-sealing, and the housing only covers the rear side of the loudspeaker unit. The housing does not occupy the space of the length and width of the loudspeaker unit itself, effectively improving the acoustic performance of the loudspeaker enclosure in a certain small size environment. [Attached Image Description]

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is a three-dimensional structural diagram of the speaker box of this utility model;

[0018] Figure 2 For example Figure 1 The exploded view of the speaker enclosure shown.

[0019] Figure 3 For example Figure 1 An exploded view of the speaker enclosure shown.

[0020] Figure 4 For along Figure 1 Cross-sectional view of line AA in the middle;

[0021] Figure 5 For along Figure 1 Cross-sectional view of the BB line. 【Detailed Implementation Methods】

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Please also refer to Figure 1-5 The present invention provides a speaker enclosure 100, which includes a housing 101 and a speaker unit 102 mounted on one side of the housing 101.

[0024] The housing 101 includes a bottom wall 1011 and a side wall 1012 formed by bending from the edge of the bottom wall 1011. The bottom wall 1011 and the side wall 1012 enclose a receiving cavity 1013.

[0025] The loudspeaker unit 102 is rectangular and includes a frame 1, a diaphragm 2 and a magnetic circuit system 3 supported on the frame 1, a voice coil 4 that drives the diaphragm 2 to vibrate and produce sound, an insert 5 passing through the magnetic circuit system 3, a conductive terminal 6 disposed within the insert 5, and a circuit board 7 fixed to the insert 5 and electrically connected to the conductive terminal 6. A housing 101 is disposed on the side of the magnetic circuit system 3 opposite to the diaphragm 2. The diaphragm 2, the frame 1, the magnetic circuit system 3, and the housing 101 together form a closed rear acoustic cavity 103. An acoustic cavity 104 is provided inside the loudspeaker unit 102, and the acoustic cavity 104 and the receiving cavity 1013 of the housing 101 together form the closed rear acoustic cavity 103.

[0026] The basin stand 1 has a ring structure, and a receiving part 11 is formed by a partial recess on its upper surface. A snap-fit ​​part 12 is formed on the inner surface of the basin stand 1.

[0027] The diaphragm 2 includes a dome 21 and a folded ring 22 surrounding the dome 21. The folded ring 22 includes an inner fixing part 221 fixed to the dome 21, an outer fixing part 222 fixed to the basin frame 1, and a folded ring part 223 connecting the inner fixing part 221 and the outer fixing part 222. The outer fixing part 222 covers the upper surface of the basin frame 1 and bends and extends to the receiving part 11 of the basin frame 1.

[0028] The magnetic circuit system 3 includes a magnetic yoke 31, a central magnet 32 ​​fixed to the magnetic yoke 31, a secondary magnet 33 arranged around the central magnet 32, a first pole core 34 stacked on the central magnet 32, and a second pole core 35 stacked on the secondary magnet 33. The secondary magnet 33 and the central magnet 32 ​​are spaced apart to form a magnetic gap 30.

[0029] The magnetic yoke 31 is a rectangular plate structure, including a first through hole 311 located in the middle and at least one connecting hole 312. The connecting hole 312 corresponds to the magnetic gap 30, that is, the connecting hole 312 is aligned with the magnetic gap 30 and communicates with it. The acoustic cavity 104 and the receiving cavity 1013 are connected through the connecting hole 312 to form the closed rear acoustic cavity 103. In this embodiment, there are four connecting holes 312, each extending from the minor axis to the major axis of the magnetic yoke 31.

[0030] The central magnet 32 ​​has a second through hole 321 to make it annular. The first pole core 34 has a third through hole 341 to make it also annular. The first through hole 311, the second through hole 321, and the third through hole 341 are aligned. The auxiliary magnet 33 is annular, and the second pole core 35 is also annular. The second pole core 35 is fixed to the snap-fit ​​part 12 of the frame 1. Specifically, the frame 1 can be molded to cover part of the second pole core 35. The auxiliary magnet 33 is clamped between the frame 1 and the yoke 31 to form a sealed structure on the outer periphery of the speaker unit 102. Specifically, the diaphragm 2, the frame 1, the auxiliary magnet 33, the yoke 31, and the housing 101 together form a closed rear acoustic cavity 103.

[0031] The voice coil 4 has a voice coil lead 41, which extends from the surface of the voice coil 4 near the diaphragm 2 and is electrically connected to the circuit board 7. The voice coil 41 has a recess 42 at a position relative to the second pole core 35.

[0032] The insert 5 passes through the magnetic yoke 31, the central magnet 32, and the first pole core 34, that is, the insert 5 is located within the first through hole 311, the second through hole 321, and the third through hole 341. The conductive terminals 6 are a pair, and the conductive terminals 6 are embedded in the insert 5 and partially exposed on the upper surface of the insert 5 to connect to the circuit board 7.

[0033] The circuit board 7 includes a fixing portion 71 fixed to the conductive terminal 6, an elastic portion 72 extending from both sides of the fixing portion 71, and a pad portion 73 connected to the elastic portion 72. The voice coil lead 41 is soldered and fixed to the pad portion 73, and the fixing portion 71 is electrically connected to the conductive terminal 6. The elastic portion 72 includes a horizontally extending first connecting portion 721 and a second connecting portion 722 extending from the first connecting portion 721 along the vibration direction of the diaphragm 2. The fixing portion 71 is connected to the first connecting portion 721, and the pad portion 73 is connected to the second connecting portion 722.

[0034] Compared with related technologies, this utility model provides a loudspeaker enclosure, which includes a housing and a loudspeaker unit mounted on one side of the housing. The loudspeaker unit includes a frame, a diaphragm and a magnetic circuit system respectively supported by the frame, and a voice coil that drives the diaphragm to vibrate and produce sound. The housing is located on the side of the magnetic circuit system away from the diaphragm. The diaphragm, the frame, the magnetic circuit system, and the housing together form a closed rear acoustic cavity. The side of the loudspeaker unit of this utility model is self-sealing, and the housing only covers the rear side of the loudspeaker unit. The housing does not occupy the space of the length and width of the loudspeaker unit itself, effectively improving the acoustic performance of the loudspeaker enclosure in a certain small size environment.

[0035] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. A loudspeaker enclosure, characterized in that: The loudspeaker enclosure includes a housing and a loudspeaker unit mounted on one side of the housing. The loudspeaker unit includes a frame, a diaphragm and a magnetic circuit system respectively supported on the frame, and a voice coil that drives the diaphragm to vibrate and produce sound. The housing is located on the side of the magnetic circuit system away from the diaphragm. The diaphragm, the frame, the magnetic circuit system, and the housing together form a closed rear acoustic cavity.

2. The speaker enclosure according to claim 1, characterized in that, The magnetic circuit system includes a magnetic yoke, a central magnet fixed to the magnetic yoke, and a secondary magnet. The secondary magnet is arranged around the central magnet and is spaced apart from the central magnet to form a magnetic gap. The secondary magnet is an annular magnet. The diaphragm, the frame, the secondary magnet, the magnetic yoke, and the housing together form the closed rear acoustic cavity.

3. The speaker enclosure according to claim 2, characterized in that, The loudspeaker unit has an internal acoustic cavity, the housing surrounds and forms a receiving cavity, the magnetic yoke has at least one connecting hole, and the acoustic cavity and the receiving cavity are connected through the connecting hole to form a closed rear acoustic cavity.

4. The speaker enclosure according to claim 3, characterized in that, There are four connecting holes, and the magnetic yoke is rectangular. Each connecting hole extends from the minor axis of the magnetic yoke to the major axis of the magnetic yoke.

5. The speaker enclosure according to claim 3, characterized in that, The position of the connecting hole corresponds to the position of the magnetic gap.

6. The speaker enclosure according to claim 3, characterized in that, The loudspeaker unit also includes an insert that passes through the magnetic circuit system, a conductive terminal disposed in the insert, and a circuit board that is fixed to the insert and electrically connected to the conductive terminal. The voice coil has a voice coil lead, and the circuit board is electrically connected to the voice coil lead.

7. The speaker enclosure according to claim 6, characterized in that, The circuit board includes a fixing part fixed to the conductive terminal, an elastic part extending from both sides of the fixing part, and a pad part connected to the elastic part, wherein the voice coil lead is soldered and fixed to the pad part.

8. The speaker enclosure according to claim 7, characterized in that, The elastic portion includes a horizontally extending first connecting portion and a second connecting portion that bends and extends from the first connecting portion along the vibration direction of the diaphragm. The fixing portion is connected to the first connecting portion, and the pad portion is connected to the second connecting portion.

9. The speaker enclosure according to claim 6, characterized in that, The magnetic circuit system further includes a first pole core stacked on the central magnet and a second pole core stacked on the auxiliary magnet, and the insert passes through the magnetic yoke, the central magnet, and the first pole core.

10. The speaker enclosure according to claim 9, characterized in that, The voice coil has a recessed portion relative to the position of the second pole core.

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