loudspeaker

Abstract

The challenge is to provide speakers. [Solution] The speaker includes a frame, a vibration system, and a magnetic circuit assembly. The vibration system includes a diaphragm, a passive diaphragm, and a voice coil. The magnetic circuit assembly includes an inner magnetic ring and an outer magnetic ring. The peripheral portion of the diaphragm is fixed to the top of the frame. The voice coil is suspended below the diaphragm and located in the magnetic gap between the inner magnetic ring and the outer magnetic ring. The space between the diaphragm and the magnetic circuit assembly is a vibration cavity, and the frame is an annular structure. The peripheral portion of the passive diaphragm is fixed to the bottom of the frame, and the space between the passive diaphragm and the magnetic circuit assembly forms a resonant cavity. The magnetic circuit assembly includes a communication hole, and the resonant cavity communicates with the vibration cavity through the communication hole. A passive radiator is added to form an acoustic lever structure within the packaged frame cavity, and the natural frequency f of the small speaker unit is set to a desired value. 0 Significantly reduce.

Description

[Technical Field]

[0001] The present invention relates to electroacoustic devices, and in particular to speakers. [Background technology]

[0002] The quality of a speaker's structure is determined by its sound quality, and Patent Document 1 discloses a speaker and enclosure that includes a vibration system and a magnetic circuit system, the vibration system including a diaphragm, the magnetic circuit system including a magnet, and the speaker further including a diaphragm frame mounted on the magnet and positioned between the diaphragm and the magnet; there is a gap between the diaphragm frame and the diaphragm; and the diaphragm frame supports the diaphragm when the diaphragm is pressed. The single diaphragm in Patent Document 1 cannot simultaneously simulate the direct transmission and reflection delay of low frequencies in a natural sound field, and it is difficult to balance low-frequency strength and low-frequency extension, resulting in poor sound quality. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Utility Model Patent No. CN202021319275.9 Summary of the Invention [Problem to be solved by the invention]

[0004] The technical object of the present invention is to provide a loudspeaker with better sound quality. [Means for solving the problem]

[0005] In order to solve the above technical problems, the technical means adopted by the present invention are as follows: A speaker comprising a frame, a vibration system, and a magnetic circuit assembly, the vibration system comprising a diaphragm, a passive diaphragm, and a voice coil, the magnetic circuit assembly comprising an inner magnetic ring and an outer magnetic ring, the peripheral portion of the diaphragm being fixed to the top of the frame, the voice coil being suspended below the diaphragm and located in the magnetic gap between the inner magnetic ring and the outer magnetic ring; the space between the diaphragm and the magnetic circuit assembly being a vibration cavity; the frame having an annular structure; the peripheral portion of the passive diaphragm being fixed to the bottom of the frame, the space between the passive diaphragm and the magnetic circuit assembly forming a resonant cavity; the magnetic circuit assembly having a connecting hole, the resonant cavity communicating with the vibration cavity through the connecting hole.

[0006] In the speaker, the communication hole is located at the center of the inner magnetic ring.

[0007] The above speaker comprises a damper mesh, an annular rear adjusting plate, and an annular PCB board, the peripheral edge of the passive diaphragm being fixed to the top surface of the rear adjusting plate, and the PCB board being fixed to the bottom surface of the rear adjusting plate; the peripheral edge of the rear adjusting plate being fixed to the bottom of the frame; the passive diaphragm having a through hole in its center, and the damper mesh being attached to the through hole of the passive diaphragm.

[0008] The above speaker comprises a damper mesh, an annular rear adjusting plate, and an annular PCB board, the peripheral edge of the passive diaphragm being fixed to the edge of the inner hole of the rear adjusting plate, and the PCB board being fixed to the bottom surface of the rear adjusting plate; the peripheral edge of the rear adjusting plate being fixed to the bottom of the frame; the central part of the passive diaphragm having a through hole, and the damper mesh being attached to the through hole of the passive diaphragm.

[0009] The above speaker comprises a damper mesh, an annular rear adjusting plate, and an annular PCB board, the peripheral edge of the passive diaphragm being fixed to the edge of the inner hole of the rear adjusting plate, and the PCB board being fixed to the bottom surface of the rear adjusting plate; the peripheral edge of the rear adjusting plate being fixed to the bottom of the frame; the rear adjusting plate and the PCB board having through holes communicating with each other, and the damper mesh being attached to the through holes of the rear adjusting plate and the PCB board.

[0010] In the above speaker, the inner hole of the annular rear adjustment plate is a stepped hole that is larger at the top and smaller at the bottom.

[0011] In the above speaker, the inner hole of the annular frame is a stepped hole that is larger at the top and smaller at the bottom, and an annular bottom plate is provided in the large diameter part of the stepped hole. The annular bottom plate has multiple damper holes that connect the vibration cavity to the outside.

[0012] The speaker comprises a damper mesh and a C-shaped PCB board, the inner hole of the frame is a stepped hole that is larger at the top and smaller at the bottom, an annular bottom plate is provided at the large diameter part of the stepped hole, and the C-shaped PCB board is fixed to the bottom surface of the annular bottom plate of the frame; the annular bottom plate has a through hole that connects the vibration cavity with the outside, the through hole is positioned at the opening of the C-shaped PCB board, and the damper mesh is attached to the through hole of the annular bottom plate.

[0013] The speaker is provided with a breathable protective cover attached to the diaphragm, the peripheral portion of the protective cover being fixed to the top of the annular frame; the bottom surface of the peripheral portion of the protective cover presses against the edge of the diaphragm. [Effects of the Invention]

[0014] Based on the conventional speaker, the present invention adds a passive radiator and forms an acoustic lever in the packaged frame cavity, which significantly reduces the natural frequency f0 of the small speaker unit and realizes low-frequency bi-phase output from a single speaker, providing effective support for restoring the natural sound field of the final product using the speaker with this structure.

[0015] The present invention will now be described in more detail with reference to the drawings and specific embodiments. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is an exploded view of a speaker according to a first embodiment of the present invention. [Figure 2] 1 is a cross-sectional view of a speaker according to a first embodiment of the present invention. [Figure 3] FIG. 6 is a cross-sectional view of a speaker according to a second embodiment of the present invention. [Figure 4] FIG. 10 is a cross-sectional view of a speaker according to a third embodiment of the present invention. [Figure 5] FIG. 10 is a cross-sectional view of a speaker according to a fourth embodiment of the present invention. [Figure 6] FIG. 10 is a left side view of a speaker according to a fifth embodiment of the present invention. [Figure 7] FIG. 10 is a cross-sectional view of a speaker according to a sixth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0017] As shown in Figures 1 and 2, the structure of the speaker with a passive radiator of Example 1 of the present invention includes an annular frame 1, a breathable protective cover 4, an annular rear adjustment plate 8, an annular PCB board 9, a vibration system, and a magnetic circuit assembly 5.

[0018] The vibration system comprises a passive diaphragm 2 and a voice coil 3, and a magnetic circuit assembly 5 is fixed to the center of the inner hole of the frame 1, and comprises an inner magnetic ring and an outer magnetic ring, the bottom of the inner magnetic ring and the bottom of the magnetic ring are connected by a magnetic yoke, and a connecting hole is arranged vertically at the center of the inner magnetic ring.

[0019] The peripheral edge of diaphragm 2 is fixed to the top of frame 1, and protective cover 4 is attached to the top of diaphragm 2, with the peripheral edge of protective cover 4 fixed to the top of annular frame 1. The bottom surface of the peripheral edge of protective cover 4 presses against the edge of diaphragm 2.

[0020] The voice coil 3 is suspended below the diaphragm 2, with the lower portion of the voice coil 3 located in the magnetic gap between the inner and outer magnetic rings. The space between the diaphragm 2 and the magnetic circuit assembly 5 forms a vibration cavity. The peripheral portion of the passive diaphragm 2 is fixed to the bottom of the frame 1, and the space between the passive diaphragm 2 and the magnetic circuit assembly 5 forms a resonant cavity. The resonant cavity communicates with the vibration cavity via a connecting hole.

[0021] The peripheral edge of passive diaphragm 2 is fixed to the top surface of rear adjustment plate 8, and PCB board 9 is fixed to the bottom surface of rear adjustment plate 8. The peripheral edge of rear adjustment plate 8 is fixed to the bottom of frame 1. Passive diaphragm 2 has a through-hole 601 in its center, and damper mesh 7 is attached to through-hole 601 in passive diaphragm 2.

[0022] The passive diaphragm 2 of the first embodiment, the rear adjustment plate 8 and the damper mesh 7 constitute the passive radiator of the first embodiment. [Example]

[0023] The structure of a speaker with a passive radiator according to Example 2 of the present invention is shown in Figure 3. The only difference between Example 2 and Example 1 is the slight difference in the structure of the passive radiator. In Example 2, the peripheral edge of the passive diaphragm 2 is fixed to the edge of the inner hole of the rear adjustment plate 8, and the PCB board 9 is fixed to the bottom surface of the rear adjustment plate 8. The peripheral edge of the rear adjustment plate 8 is fixed to the bottom of the frame 1. [Example]

[0024] The structure of a speaker with a passive radiator according to Example 3 of the present invention is shown in Figure 4. The only difference between Example 3 and Example 1 is the slight difference in the structure of the passive radiator. In Example 3, the peripheral edge of the passive diaphragm 2 is fixed to the edge of the inner hole of the rear adjusting plate 8, and the PCB board 9 is fixed to the bottom surface of the rear adjusting plate 8. The peripheral edge of the rear adjusting plate 8 is fixed to the bottom of the frame 1. The rear adjusting plate 8 and the PCB board 9 have through holes 801 that communicate with each other, and the damper mesh 7 is attached to the through holes in the rear adjusting plate 8 and the PCB board 9. [Example]

[0025] FIG. 5 shows the structure of a speaker with a passive radiator according to Example 4 of the present invention. Example 4 differs from Example 1 only in the slight structure of the passive radiator. In Example 4, the inner hole of the annular rear adjustment plate 8 is a stepped hole that is larger at the top and smaller at the bottom, and the peripheral edge of the rear adjustment plate 8 is fixed to the bottom of the frame 1. The peripheral edge of the passive diaphragm 2 is fixed to the top surface of the larger diameter part of the stepped hole in the rear adjustment plate 8, and the PCB board 9 is fixed to the bottom surface of the rear adjustment plate 8, and the diameter of the inner hole of the PCB board 9 is the same as the diameter of the smaller diameter part of the stepped hole in the rear adjustment plate 8. [Example]

[0026] The structure of a speaker with a passive radiator according to Example 5 of the present invention is shown in Figure 6. The only difference between Example 5 and Example 1 is a slight change in the frame structure. In Example 5, the annular frame 1 has a T-shaped structure that is larger at the top and smaller at the bottom, and the inner hole of the frame 1 is a stepped hole that is larger at the top and smaller at the bottom. An annular bottom plate is provided at the large diameter part of the stepped hole, and the annular bottom plate has multiple damper holes that connect the vibration cavity to the outside. [Example]

[0027] The structure of a speaker with a passive radiator according to Example 6 of the present invention is shown in Figure 7. Example 6 differs from Example 1 in that both the passive radiator and the frame are different. In Example 6, the annular frame 1 has a T-shaped structure that is larger at the top and smaller at the bottom, and the inner hole of the frame 1 is a stepped hole that is larger at the top and smaller at the bottom. A ring-shaped bottom plate is provided at the large diameter part of the stepped hole, and the PCB board 9 is C-shaped with an opening.

[0028] The C-shaped PCB board 9 is fixed to the outer bottom surface of the annular bottom plate of the frame 1. The annular bottom plate has a through hole that connects the vibration cavity with the outside, and the through hole is positioned at the opening of the C-shaped PCB board 9, and the damper mesh 7 is attached to the through hole of the annular bottom plate.

[0029] The peripheral edge of the passive diaphragm 2 of Example 6 is directly fixed to the bottom of the frame 1. The passive diaphragm 2 is an integrated film with no through-hole in the center.

[0030] The speaker of the above embodiment of the present invention is based on a conventional speaker and adds a passive radiator, which has better acoustic characteristics and effectively improves the low frequency response of the speaker unit, which is beneficial to improving the performance of the final product.

Claims

1. a loudspeaker comprising a frame, a vibration system, and a magnetic circuit assembly, the vibration system comprising a diaphragm, a passive diaphragm, and a voice coil, the magnetic circuit assembly comprising an inner magnetic ring and an outer magnetic ring, the peripheral portion of the diaphragm being fixed to the top of the frame, the voice coil being suspended below the diaphragm and located in a magnetic gap between the inner magnetic ring and the outer magnetic ring; a loudspeaker in which the space between the diaphragm and the magnetic circuit assembly is a vibration cavity, the vibration system comprising a passive diaphragm, and the frame having an annular structure; the peripheral portion of the passive diaphragm being fixed to the bottom of the frame, the space between the passive diaphragm and the magnetic circuit assembly forming a resonant cavity; the magnetic circuit assembly comprising a connecting hole, the resonant cavity communicating with the vibration cavity through the connecting hole; The passive diaphragm comprises a damper mesh, an annular rear adjusting plate, and an annular PCB board, the peripheral edge of the passive diaphragm being fixed to the top surface of the rear adjusting plate, and the PCB board being fixed to the bottom surface of the rear adjusting plate; the peripheral edge of the rear adjusting plate being fixed to the bottom of the frame; the passive diaphragm having a through hole in its center, and the damper mesh being attached to the through hole of the passive diaphragm. A speaker characterized by:

2. The inner hole of the annular rear adjustment plate is a stepped hole that is larger at the top and smaller at the bottom.

2. The loudspeaker according to claim 1 .

3. The inner hole of the annular frame is a stepped hole that is larger at the top and smaller at the bottom, and an annular bottom plate is provided at the large diameter part of the stepped hole. The annular bottom plate has a plurality of damper holes that communicate the vibration cavity with the outside.

2. The loudspeaker according to claim 1 .

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