Medium-bass loudspeaker

Abstract

The utility model discloses a mid-bass loudspeaker. The mid-bass loudspeaker comprises a support, a sound basin arranged on the support, a voice coil connected to the sound basin and a magnetic circuit used for driving the voice coil, the sound basin comprises a glass body, the glass body comprises a truncated conical glass cone, and the glass cone is made of glass. The mid-bass loudspeaker provided by the utility model is relatively smooth in frequency response curve, high in sound reduction degree, and relatively good in waterproof, fireproof and anti-aging performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of low-frequency loudspeaker, in particular to a kind of vehicle-mounted low-frequency loudspeaker. BACKGROUND

[0002] Low-frequency loudspeaker is an important component of vehicle-mounted audio system, for responsible for the playback of midrange and low frequency sound. The voice coil plays a crucial role in the sound performance of low-frequency loudspeaker. The traditional voice coil of low-frequency loudspeaker includes paper cone, polypropylene, etc. With the increasing demand for sensitivity, distortion and other performance of vehicle-mounted low-frequency loudspeaker, the traditional voice coil cannot meet the design requirements of low-frequency loudspeaker. With the change of application scenarios, such as being used as a sound unit for pedestrian warning device in outdoor environment, the voice coil also needs to meet the requirements of waterproof, aging resistance, etc. It also needs to meet the requirements of environmental friendliness, aesthetic appearance, etc.

[0003] The above information disclosed in the BACKGROUND section is only for the purpose of enhancing the understanding of the background of the present application, therefore, it can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0004] The utility model provides an improved low-frequency loudspeaker with a relatively smooth frequency response curve, high sound restoration degree, and good waterproof, fireproof and aging resistance performance.

[0005] The utility model adopts the following technical solutions:

[0006] A low-frequency loudspeaker includes a support, a voice coil connected to the voice coil, and a magnetic circuit for driving the voice coil. The voice coil includes a glass main body, which includes a glass cone in the shape of a truncated cone. The glass cone is made of glass.

[0007] In a preferred embodiment, the glass main body further includes a spherical top portion, the glass cone is arranged around the spherical top portion, the spherical top portion is arched in the middle, and the spherical top portion is connected to the inner edge of the glass cone.

[0008] In a more preferred embodiment, the spherical top portion is made of glass, and the spherical top portion and the glass cone are integral.

[0009] In a more preferred embodiment, the outer edge of the spherical top portion is connected to the inner edge of the glass cone by a ring-shaped flange, the outer edge of the glass cone is higher than its inner edge, the middle of the spherical top portion is arched upward, and the flange extends upward from the outer edge of the spherical top portion.

[0010] In a further preferred embodiment, the flange is made of glass, and the glass cone, the flange and the spherical top portion are integral.

[0011] In a further preferred embodiment, the top of the dome is lower than the outer edge of the glass cone.

[0012] In a preferred embodiment, the glass body is a glass piece integrally formed.

[0013] In a preferred embodiment, the glass body has a thickness of 0.05mm to 0.35mm and a Young's modulus of 70GPa to 90GPa.

[0014] In a preferred embodiment, the sound cone further comprises a resilient folded ring, and the outer edge of the glass cone is connected to the support through the resilient folded ring. Further, the outer edge of the glass cone and the resilient folded ring are bonded to each other.

[0015] In a preferred embodiment, the mid-bass loudspeaker is a car loudspeaker.

[0016] In a preferred embodiment, the magnetic circuit comprises a U-shaped iron, a front sheet and a plurality of magnetic steels, the plurality of magnetic steels and the front sheet are stacked in the U-shaped iron, gaps are formed between the plurality of magnetic steels and the inner surface of the U-shaped iron, between the front sheet and the inner surface of the U-shaped iron, the gaps are connected to form a magnetic gap, and a portion of the voice coil is movably inserted into the magnetic gap. Further, the upper end of the voice coil is bonded to the folded edge of the glass body or the inner edge of the cone. Further, the upper end of the voice coil is bonded to the folded edge, and part of the folded edge and part of the dome are located in the upper end of the voice coil.

[0017] In a preferred embodiment, the voice coil is provided with a through hole, and the support is also provided with a through hole, and each cavity in the loudspeaker is in communication with the atmosphere outside through the through holes.

[0018] In a preferred embodiment, the mid-bass loudspeaker further comprises a positioning support sheet, the positioning support sheet is sleeved on the voice coil, and the outer edge of the positioning support sheet is fixed to the support.

[0019] In a preferred embodiment, the mid-bass loudspeaker further comprises an inductor, the inductor is arranged on the support, and the inductor and the coil of the voice coil are electrically connected.

[0020] The above scheme is adopted, and the following advantages are achieved compared with the prior art:

[0021] The mid-bass loudspeaker has the following advantages: the glass body of the sound cone has very excellent mechanical and mechanical properties, fast sound speed, low density and good damping performance; the sound cone has good waterproof, fireproof and aging-resistant performance; the sound cone has good light transmittance and can be colored, and has a beautiful appearance; the glass material of the sound cone is pollution-free and can be recycled, and is friendly to the environment. Attached Figure Description

[0022] To more clearly illustrate the technical solution 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.

[0023] Figure 1 This is a perspective view of a mid-bass speaker according to an embodiment of the present invention.

[0024] Figure 2 This is an exploded view of a mid-bass speaker according to an embodiment of the present invention.

[0025] Figure 3 This is a structural diagram of a sound cone according to an embodiment of the present utility model.

[0026] Figure 4 This is a top view of a mid-bass speaker according to an embodiment of the present invention.

[0027] Figure 5 for Figure 4 Sectional view along the AA direction.

[0028] Figure 6 This is a cross-sectional view of another mid-bass speaker according to an embodiment of the present invention.

[0029] Figure 7 The frequency response curves of the mid-bass speakers in the embodiments and comparative examples are shown.

[0030] In the above attached figures,

[0031] 1. Bracket; 11. Through hole; 12. Padding;

[0032] 2. Cone; 21. Glass body; 211. Glass cone; 212. Dome; 213. Flanged edge; 22. Elastic folding ring;

[0033] 3. Voice coil; 31. Through hole;

[0034] 4. Magnetic circuit; 40. Magnetic gap; 41. U-shaped iron; 42. First magnet; 43. Front piece; 44. Second magnet;

[0035] 5. Positioning support;

[0036] 6. Inductance. Detailed Implementation

[0037] The preferred embodiments of the utility model will be described below in detail with reference to the drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation on the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0038] In this article, "inside", "outside" are defined with reference to the loudspeaker, and the direction close to the loudspeaker is inside, and vice versa. The orientation words "up", "down", "horizontal" are intended to facilitate the understanding of the structure of the bass speaker by those skilled in the art, and are not used to limit the state of the bass speaker after it is installed in the use scene. For example, the bass speaker can be installed on the horizontal surface, inclined surface or vertical surface of the vehicle.

[0039] Figures 1 to 6 The drawings are drawn in true proportion, and the proportion and position of each element are not listed one by one in order to maintain the brevity of the specification, but the proportion and position of each element should be regarded as part of the content of this specification.

[0040] The embodiment provides a bass speaker, in particular, a bass speaker for automobile. In particular, the bass speaker can be used as a sound unit of a car pedestrian warning device, installed on an electric vehicle to send a pedestrian warning sound outside the electric vehicle, reminding pedestrians of the existence or proximity of vehicles. In this article, "bass" refers to the sound whose frequency range covers the bass and midrange, and its frequency range can be 20Hz-4KHz.

[0041] Referring to Figures 1 to 6 , the bass speaker includes a bracket 1, a cone 2, a voice coil 3 and a magnetic circuit 4. The bracket 1 is an integrally injection molded plastic part, which is installed on the car to support the entire bass speaker and protect the internal components such as the cone 2. The cone 2 is provided on the bracket 1, the upper end of the voice coil 3 is connected to the cone 2, and the lower end of the voice coil 3 (the part with the coil wound) is inserted into the magnetic gap 40 of the magnetic circuit 4, which drives the voice coil 3 to vibrate up and down through the magnetic circuit 4. When the coil of the voice coil 3 is connected to the audio electrical signal, under the action of the magnetic field of the magnetic circuit 4, based on the principle of electromagnetic induction, the voice coil 3 vibrates up and down in the magnetic gap 40, thereby driving the cone 2 to vibrate and emit sound, realizing the conversion of electricity to sound.

[0042] In combination with Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, the cone 2 comprises a glass body 21 and a resilient suspension ring 22, the glass body 21 is suspended on the support 1 through the resilient suspension ring 22. The glass body 21 comprises a glass cone 211 in the shape of a truncated cone, the glass cone 211 is made of glass. The glass body 21 further comprises a ball top 212, the glass cone 211 is arranged around the ball top 212, the ball top 212 is arched in the middle, and the ball top 212 is connected to the inner edge of the glass cone 211. The ball top 212 is made of glass, and the ball top 212 and the glass cone 211 are integrated.

[0043] Further, the outer edge of the ball top 212 is connected to the inner edge of the glass cone 211 through a turn-up edge 213, the outer edge of the glass cone 211 is higher than the inner edge, the middle of the ball top 212 is arched upward, the turn-up edge 213 extends upward from the outer edge of the ball top 212, and the top of the ball top 212 is lower than the outer edge of the glass cone 211. The turn-up edge 213 is made of glass, and the glass cone 211, the turn-up edge 213 and the ball top 212 are integrated. In this embodiment, the glass body 21 is an integrally formed glass piece. The glass body 21 is composed of a single layer of glass, and the thickness is substantially uniform. The thickness of the glass body 21 is 0.05mm-0.35mm, and the Young's modulus of the glass body 21 is 70GPa-90GPa. The glass body 21 is preferably a transparent colorless single layer of glass, and can also be colored glass. The glass material is used as the cone body of the mid-bass loudspeaker, which has low density, light weight, high sound speed and other advantages, and can be well used as the diaphragm material of the loudspeaker. At the same time, the glass material is also an environmentally friendly and recyclable material.

[0044] The upper end of the voice coil 3 can be bonded to the turn-up edge 213 of the glass body 21 or the inner edge of the cone 211. Further, the upper end of the voice coil 3 is bonded to the turn-up edge 213, and part of the turn-up edge 213 and part of the ball top 212 are located in the upper end of the voice coil 3.

[0045] The outer edge of the glass cone 211 is connected to the support 1 through the resilient suspension ring 22. The outer edge of the glass cone 211 and the resilient suspension ring 22 are bonded to each other. The material of the resilient suspension ring 22 can be rubber, and the resilient suspension ring 22 adopts a rubber ring which can be elastically deformed. The outer edge of the resilient suspension ring 22 is bonded and fixed to the upper surface of the support 1 by glue.

[0046] The magnetic circuit 4 comprises a U-shaped iron 41, a front sheet 43 and a plurality of magnetic steels. The plurality of magnetic steels specifically comprises a first magnetic steel 42 and a second magnetic steel 44, the first magnetic steel 42, the front sheet 43 and the second magnetic steel 44 are sequentially stacked from bottom to top and fixed in the U-shaped iron 41. There are gaps between the first magnetic steel 42, the second magnetic steel 44 and the inner surface of the U-shaped iron 41, and between the front sheet 43 and the inner surface of the U-shaped iron 41, which are connected to form the above-mentioned magnetic gap 40.

[0047] The mid-bass speaker also includes a positioning bracket 5, which is fitted onto the voice coil 3, and its outer edge is fixed to the bracket 1. The voice coil 3 has a through hole 31, and the bracket 1 also has a through hole 11, allowing the various cavities inside the speaker to communicate with the outside atmosphere. In this embodiment, the glass body 21 of the cone 2 is transparent, allowing the positioning bracket 5 to be observed from the outside. The upper shell of the positioning bracket 5 is designed with patterns, printed logos, etc., enhancing the speaker's aesthetics.

[0048] exist Figure 5 In the example shown, the mid-bass speaker also includes an inductor 6, which is mounted on the bracket 1 and is electrically connected to the coil of the voice coil 3.

[0049] An annular pad 12 is also fixed on the upper surface of the basin frame 1. When the bracket 1 is installed on the car, the pad 12 is located between the bracket and the sheet metal parts of the car, and plays a buffering role.

[0050] right Figure 5 Frequency response tests were performed on the shown mid-bass speaker and the comparative mid-bass speaker. The comparative mid-bass speaker and... Figure 5 The only difference between the mid-bass speakers is: Figure 5 The glass body 21 in the middle has been replaced with a paper diaphragm, and the material has been replaced with paper; the structure and shape are completely the same. Figure 5 As shown. Figure 7 As shown, the thin line represents the frequency response curve of the comparative mid-bass speaker, and the thick line represents the frequency response curve of the mid-bass speaker in the embodiment. Figure 5 The frequency response curve of the mid-bass speaker appears smoother, while the frequency response curve of the comparative speaker using a common paper cone exhibits varying degrees of peaks and troughs. Furthermore, the speaker using a glass diaphragm in this embodiment sounds more natural and has higher fidelity.

[0051] In this embodiment, the mid-bass speaker cone 2 is made of glass body 21, which has excellent mechanical and mechanical properties, high sound velocity, low density and good damping performance; the cone 2 has good waterproof, fireproof and aging resistance; the cone 2 has good light transmittance and can be colored, with a beautiful appearance; the glass material of the cone 2 is non-polluting, recyclable and environmentally friendly.

[0052] As indicated in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0053] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar.

[0054] It is further to be understood that the terms "first", "second", etc., are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a particular order or importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present disclosure.

[0055] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and are preferred embodiments, the purpose of which is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application.

Claims

1. A mid-bass loudspeaker comprising a bracket, a cone provided on the bracket, a voice coil connected to the cone, and a magnetic circuit for driving the voice coil, characterized in that, The sound cone comprises a glass body, the glass body comprises a glass cone in the shape of a truncated cone, the glass cone is made of glass.

2. The mid-bass loudspeaker of claim 1, wherein, The glass body further comprises a ball top, the glass cone is arranged around the ball top, the ball top is arched in the middle, and the ball top is connected to the inner edge of the glass cone.

3. The mid-bass loudspeaker of claim 2, wherein, The ball top is made of glass, and the ball top and the glass cone are integrated.

4. The mid-bass loudspeaker of claim 2 or 3, wherein, The outer edge of the ball top is connected to the inner edge of the glass cone through a turn-up edge, the outer edge of the glass cone is higher than the inner edge, the middle of the ball top is arched upward, and the turn-up edge extends upward from the outer edge of the ball top.

5. The mid-bass loudspeaker of claim 4, wherein, The turn-up edge is made of glass, and the glass cone, the turn-up edge and the ball top are integrated.

6. The mid-bass loudspeaker of claim 4, wherein, The top of the ball top is lower than the outer edge of the glass cone.

7. The mid-bass loudspeaker of claim 1, wherein, The glass body is an integrally formed glass piece.

8. The mid-bass loudspeaker of claim 1, wherein, The thickness of the glass body is 0.05mm-0.35mm, and the Young's modulus of the glass body is 70GPa-90GPa.

9. The mid-bass loudspeaker of claim 1, wherein, The sound cone further comprises an elastic folding ring, and the outer edge of the glass cone is connected to the support through the elastic folding ring.

10. The mid-bass loudspeaker of claim 1, wherein, The medium-low frequency loudspeaker is a car loudspeaker; the magnetic circuit comprises a U-shaped iron, a front sheet and a plurality of magnetic steels, the plurality of magnetic steels and the front sheet are stacked in the U-shaped iron, gaps are formed between the plurality of magnetic steels and the inner surface of the U-shaped iron and between the front sheet and the inner surface of the U-shaped iron, the gaps are connected to form a magnetic gap, and a part of the voice coil is movably arranged in the magnetic gap; the medium-low frequency loudspeaker further comprises a positioning support sheet, the positioning support sheet is sleeved on the voice coil, and the outer edge of the positioning support sheet is fixed on the support; the medium-low frequency loudspeaker further comprises an inductor, the inductor is arranged on the support, and the inductor and the voice coil are electrically connected.

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