Loudspeaker

Abstract

The utility model discloses a loudspeaker, comprising a vibration system; the vibration system comprises a voice coil framework, a voice coil, a positioning support chip and a voice cone; an annular corrugated patch is arranged on the annular corrugated diaphragm, and the annular corrugated diaphragm and the annular corrugated patch are bonded together through a binder; the center line of the middle hole of the annular corrugated diaphragm coincides with the center line of the middle hole of the annular corrugated patch, the size of the middle hole of the annular corrugated diaphragm is the same as that of the middle hole of the annular corrugated patch, and the width of the annular corrugated diaphragm is larger than that of the annular corrugated patch. According to the loudspeaker provided by the utility model, the annular corrugated patch is arranged on the annular corrugated diaphragm, so that the effects of reinforcement and deformation prevention can be achieved; on the premise that the original characteristic parameters of the loudspeaker are not changed and the power is improved, the problems of breakage and deformation of the positioning support chip generated in the working process of the loudspeaker are avoided, and the audio-video effect of the vehicle-mounted audio system can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a loudspeaker. Background Art

[0002] At present, loudspeakers are commonly used electroacoustic transducers that convert electrical energy into sound energy, and are mainly composed of a vibration system and a magnetic circuit system. As one of the structural components of the loudspeaker, the positioning support is mainly used to ensure the correct position of the voice coil in the magnetic gap, to ensure that the vibration system can reciprocate up and down when the voice coil is subjected to force, and to provide force for the vibration system to reciprocate, and together with the sound basin, determine the resonant frequency of the loudspeaker. For small speakers with a size of 200mm or less, they can usually have a rated power of 50W, but it is difficult to have a rated power of 100W or more. When conducting reliability tests on loudspeakers with a size of 200mm or less, the positioning support usually breaks or deforms, which will cause the voice coil to detach from the magnetic gap, making the performance of the speaker not meet the requirements. Utility Model Content

[0003] In view of this, a technical problem to be solved by the present invention is to provide a loudspeaker.

[0004] According to one aspect of the utility model, a loudspeaker is provided, comprising: a vibration system; the vibration system comprises: a voice coil frame, a voice coil coil, a positioning support and a sound basin; the voice coil coil is wound on the voice coil frame, and the top of the voice coil frame is connected to the sound basin; the positioning support is an annular corrugated diaphragm, and the center hole of the annular corrugated diaphragm is sleeved on the voice coil frame; an annular corrugated patch is arranged on the annular corrugated diaphragm, and the annular corrugated diaphragm and the annular corrugated patch are bonded together by an adhesive; the center line of the center hole of the annular corrugated diaphragm and the center hole of the annular corrugated patch coincide with the center line of the center hole of the annular corrugated diaphragm and the center hole of the annular corrugated patch are the same in size, and the width of the annular corrugated diaphragm is greater than the width of the annular corrugated patch.

[0005] In some embodiments, a plurality of notches are provided at the edge of the central hole of the annular corrugated patch.

[0006] In some embodiments, the plurality of notches are evenly distributed along the circumference of the central hole of the annular corrugated patch.

[0007] In some embodiments, the voice coil is located at the lower part of the voice coil frame, and a plurality of rows of ventilation holes are arranged on the side wall of the voice coil frame.

[0008] In some embodiments, it includes: a magnetic circuit system; the magnetic circuit system includes: a magnetic conductive lower plate, a magnetic conductive column, a ring-shaped magnetic steel, and an upper clamping plate; the ring-shaped magnetic steel is sleeved on the magnetic conductive column to form a magnetic circuit assembly; the magnetic circuit assembly is arranged between the magnetic conductive lower plate and the upper clamping plate; the voice coil frame is sleeved on the upper end of the magnetic conductive column.

[0009] In some embodiments, the magnetic conductive lower plate and the magnetic conductive column are an integrally formed structure.

[0010] In some embodiments, the ring-shaped magnetic steel includes a plurality of NdFeB magnetic sheets, and the plurality of NdFeB magnetic sheets are bonded together by an adhesive to form the ring-shaped magnetic steel.

[0011] The loudspeaker of the utility model is provided with an annular corrugated patch on the annular corrugated diaphragm, which can play a role of reinforcement and deformation prevention; under the premise of ensuring that the original characteristic parameters of the loudspeaker remain unchanged and the power is improved, the problem of breakage and deformation of the positioning support piece generated during the operation of the loudspeaker is avoided, and the audio and video effects of the car audio can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 is a cross-sectional schematic diagram of an embodiment of a loudspeaker according to the utility model;

[0014] Figure 2 is a cross-sectional schematic diagram of a positioning support sheet in an embodiment of a loudspeaker according to the utility model;

[0015] Figure 3 is a cross-sectional schematic diagram of an annular corrugated patch in one embodiment of a loudspeaker according to the utility model;

[0016] Figure 4 The figure is a schematic top view of a positioning support in an embodiment of a loudspeaker according to the utility model. DETAILED DESCRIPTION

[0017] The present invention is described more fully below with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention. The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The technical solutions of the present invention are described in many aspects below in conjunction with the drawings and embodiments.

[0018] like Figure 1-4 As shown, the utility model provides a speaker, including a vibration system, the vibration system includes a voice coil frame 5, a voice coil 6, a positioning support 7 and a sound cone 8. The voice coil 6 is wound on the voice coil frame 5, and the top of the voice coil frame 5 is connected to the sound cone 8.

[0019] like Figure 2 As shown in FIG. 1 , the positioning support 7 can be of various structures, for example, an annular corrugated diaphragm 71, the middle hole 72 of which is sleeved on the voice coil frame 5. An annular corrugated patch 91 is provided on the annular corrugated diaphragm 71, and the annular corrugated diaphragm 71 and the annular corrugated patch 91 are bonded together by an adhesive. The bonding portion 73 formed by bonding the annular corrugated diaphragm 71 and the annular corrugated patch 91 is shown in FIG. Figure 2 shown.

[0020] The center lines of the middle hole 72 of the annular corrugated diaphragm 71 and the middle hole 92 of the annular corrugated patch 91 coincide with each other, the sizes of the middle hole 72 of the annular corrugated diaphragm 71 and the middle hole 92 of the annular corrugated patch 91 can be the same, and the width of the annular corrugated diaphragm 71 is greater than the width of the annular corrugated patch 91. Figure 2 As shown, the width of the annular corrugated patch 91 is A. The materials of the annular corrugated diaphragm 71 and the annular corrugated patch 91 can be existing cloth materials, and the materials of the annular corrugated diaphragm 71 and the annular corrugated patch 91 can be the same.

[0021] The vibration system of the loudspeaker of the utility model can solve the problem that the positioning support piece is prone to breakage during the operation of the existing high-power small loudspeaker.

[0022] In some embodiments, Figure 4 As shown, a plurality of notches (nicks) 93 are arranged at the edge of the central hole of the annular corrugated patch. The plurality of notches 93 are evenly distributed along the circumference of the central hole of the annular corrugated patch.

[0023] By adding a layer of annular corrugated patch with a notch at the middle hole of the positioning support and the ring near it for reinforcement, when the voice coil and the sound basin perform high-power linear motion, the two-layer positioning support design can better play a role in reinforcement and deformation prevention compared to increasing the single-layer thickness of the positioning support. Under the premise of ensuring that the original characteristic parameters (compliance) of the speaker remain unchanged and increasing the power, the problem of positioning support breakage and deformation generated during the operation of the speaker can be well solved. A notch is added at the middle hole of the annular corrugated patch to facilitate assembly operations.

[0024] The electric speaker will cause increased distortion due to the nonlinearity of the support system and other reasons. The top arc radius of the corrugation of the positioning support (the inner diameter of the tangent arc) is calculated according to the formula: R = [(2δ-H)2+L2-δ2] / [4(H-δ)]; where δ is the thickness of the diaphragm, H is the height of the corrugation of the positioning support, and L is the distance between adjacent corrugations of the positioning support.

[0025] Under the same conditions, by controlling a single variable and adjusting the size of δ, R can be designed to be the smallest. If R is too large, the nonlinearity and distortion will be large. The smaller the R value, the better the speaker performance, but as the power increases, the R corner is more likely to break and deform. By adding a layer of annular corrugated patch for reinforcement, the positioning support can be effectively prevented from breaking and deforming.

[0026] By determining the location where the maximum amplitude of the loudspeaker occurs through simulation, the width A of the annular corrugated patch can be determined, such as Figure 2 As shown. The fewer the annular corrugated patches, the lower the price, the smaller the effective vibration mass weight of the speaker, and the better it can provide the elastic force (damping) required for vibration.

[0027] While improving the rigidity of the hole in the positioning support, it is also necessary to facilitate production operations, that is, the positioning support is not easy to be inserted into the voice coil; adding notches around the hole in the positioning support can prevent the hole in the positioning support from being hard and scratching the copper wire of the voice coil. The number of notches B and the size of the notches C at the hole in the annular corrugated patch can be determined according to the actual assembly situation. The notches at the hole in the annular corrugated patch are usually symmetrical in center. Setting a reasonable notch size C can ensure that the notch is completely covered by the connecting glue after assembly, and the reliability of the speaker is guaranteed. The manufacturing process of the positioning support is simple and the price is relatively advantageous, that is, it can be formed by stacking two layers of cloth together and hot pressing. After the glue melts, it sticks together, which can achieve a good effect.

[0028] Adding a layer of cloth to the hole in the support and the fold near it is very effective in improving the support of small loudspeakers with high power and large amplitude. Through simulation, it can be found that when the support moves up and down, the vibration and deformation of the fold at the center and nearby are the largest, while the peripheral part is attached to the basin frame, the amplitude is relatively small and the deformation is also small; adding a layer of cloth here can ensure the stability of the entire support during vibration, and avoid the hidden dangers of long-term vibration leading to breakage and large deformation at high power.

[0029] In some embodiments, the voice coil 6 is located at the lower part of the voice coil frame 5, and multiple rows of vents are arranged on the side wall of the voice coil frame 5. The speaker includes a magnetic circuit system; the magnetic circuit system includes a magnetic conductive lower plate 1, a magnetic conductive column 2, an annular magnetic steel 3, and an upper clamping plate 4; the annular magnetic steel 3 is sleeved on the magnetic conductive column 2 to form a magnetic circuit assembly; the magnetic circuit assembly is arranged between the magnetic conductive lower plate 1 and the upper clamping plate 4; the voice coil frame 5 is sleeved on the upper end of the magnetic conductive column 2.

[0030] The magnetic lower plate 1 and the magnetic column 2 can be an integral structure or can be bonded together. The ring-shaped magnetic steel 3 includes multiple NdFeB magnetic sheets, which are bonded together by a binder to form the ring-shaped magnetic steel 3.

[0031] like Figure 1 As shown, a positioning support plate 7 is provided under the sound basin 8, and the positioning support plate 7 is connected to the voice coil frame 5. The positioning support plate 7 is an annular corrugated diaphragm. The outer edge of the annular corrugated diaphragm is connected to the shell of the upper part of the speaker, and the middle hole of the annular corrugated diaphragm is connected to the voice coil frame 5. The middle hole of the annular corrugated diaphragm can be connected to the voice coil frame 5 by glue.

[0032] The magnetic conductive lower plate 1 is provided with a magnetic conductive column 2 and a ring-shaped magnetic steel 3. In the actual assembly process, the positioning support piece 7 with a notch is inserted from the voice coil 6 to the middle position of the voice coil frame 5, and glue is applied at the connection to fix it.

[0033] When the speaker is powered on, the voice coil frame 5 and the voice coil 6 drive the positioning support 7 and the sound basin 8 to do up and down reciprocating motion. During the vibration process, the middle hole of the positioning support 7 and the surrounding position vibrate violently. The double-layer structure of the middle hole of the positioning support 7 can play a role in reinforcement and deformation prevention. Under the premise of ensuring that the original characteristic parameters (compliance) of the speaker remain unchanged and the power is increased, the positioning support breakage and deformation problems generated during the operation of the speaker can be avoided, and the audio and video effects of the car audio can be improved. At present, the speaker of the utility model has been used in high-end cars.

[0034] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. A loudspeaker, characterized in that: include: Vibration system; The vibration system comprises: a voice coil frame, a voice coil, a positioning support and a sound cone; the voice coil is wound on the voice coil frame, and the top of the voice coil frame is connected to the sound cone; The positioning support is an annular corrugated diaphragm, the center hole of which is sleeved on the voice coil frame; an annular corrugated patch is arranged on the annular corrugated diaphragm, and the annular corrugated diaphragm and the annular corrugated patch are bonded together by an adhesive; the center lines of the center hole of the annular corrugated diaphragm and the center hole of the annular corrugated patch coincide with each other, the center hole of the annular corrugated diaphragm and the center hole of the annular corrugated patch are the same in size, and the width of the annular corrugated diaphragm is greater than the width of the annular corrugated patch.

2. The loudspeaker according to claim 1, characterized in that A plurality of notches are arranged on the edge of the central hole of the annular corrugated patch.

3. The loudspeaker according to claim 2, characterized in that The plurality of notches are evenly distributed along the circumference of the central hole of the annular corrugated patch.

4. The loudspeaker according to claim 1, characterized in that The voice coil is located at the lower part of the voice coil frame, and a plurality of rows of vent holes are arranged on the side wall of the voice coil frame.

5. The loudspeaker according to claim 1, characterized in that include: Magnetic circuit system; The magnetic circuit system includes: a magnetic conductive lower plate, a magnetic conductive column, a ring-shaped magnetic steel, and an upper clamping plate; the ring-shaped magnetic steel is sleeved on the magnetic conductive column to form a magnetic circuit component; the magnetic circuit component is arranged between the magnetic conductive lower plate and the upper clamping plate; the voice coil frame is sleeved on the upper end of the magnetic conductive column.

6. The loudspeaker according to claim 5, characterized in that The magnetic conductive lower plate and the magnetic conductive column are an integrally formed structure.

7. The loudspeaker according to claim 5, characterized in that The annular magnetic steel comprises a plurality of NdFeB magnetic sheets, and the plurality of NdFeB magnetic sheets are bonded together by an adhesive to form the annular magnetic steel.

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