Loudspeaker and automobile sound system

Abstract

The utility model discloses a loudspeaker and an automobile sound system. The loudspeaker comprises a basin frame, a sound basin, a damper, a voice coil used for driving the sound basin to vibrate and a magnetic circuit assembly used for driving the voice coil to move, the sound basin is provided with a cone with the middle protruding upwards, the magnetic circuit assembly is arranged below the sound basin, the loudspeaker further comprises a damper fixing ring, the damper fixing ring is connected to the basin frame, and the damper fixing ring is connected to the cone frame. The outer edge of the cone is fixed on the basin stand and / or the damper fixing ring; the outer edge of the damper is fixed to the damper fixing ring, and the inner edge of the damper is fixed to the cone. According to the loudspeaker provided by the utility model, the power is improved on the premise of not additionally increasing the height / thickness.

Description

Technical Field

[0001] The utility model relates to a loudspeaker and a car audio system. Background Art

[0002] Speakers, especially car speakers, are moving towards the concept of lightweight, environmental protection, and energy saving. The overall height of the speaker is lower than that of conventional speakers, so it is widely used in some audio products with more space and volume restrictions. Conventional speakers are usually not equipped with a spring, because if a spring is installed on the voice coil, the overall height or thickness of the speaker will increase. However, if a spring is not installed, the amplitude of the voice coil deviating from the vibration axis exceeds the set range when the power is high, which is easy to cause distortion, thereby limiting the power increase of the speaker. Utility Model Content

[0003] The purpose of the utility model is to provide an improved speaker, which improves the power without increasing the height / thickness. The utility model also provides a car audio system using the speaker

[0004] The technical solution adopted by the utility model is as follows:

[0005] A loudspeaker comprises a basin frame, a sound basin, a spring, a voice coil for driving the sound basin to vibrate, and a magnetic circuit assembly for driving the voice coil to move, wherein the sound basin has a cone with a middle portion protruding upward, and the magnetic circuit assembly is arranged below the sound basin. The loudspeaker also comprises a spring fixing ring, which is connected to the basin frame, and the outer edge of the cone is fixed to the basin frame and / or the spring fixing ring; the outer edge of the spring is fixed to the spring fixing ring, and the inner edge of the spring is fixed to the cone.

[0006] In some preferred embodiments, the elastic wave fixing ring has an annular upper fixing surface, and the outer edge of the elastic wave is attached to and fixed on the upper fixing surface.

[0007] In some more preferred embodiments, the spring wave has a plurality of peaks and troughs between its outer edge and inner edge, and the peaks are lower than or flat to the outer edge of the spring wave.

[0008] In a more preferred embodiment, the upper fixing surface is a stepped surface that is sunken relative to the outer edge of the elastic wave fixing ring.

[0009] In some preferred embodiments, the cone has an inner edge opposite to the outer edge, the inner edge of the elastic wave is a hollow truncated cone or truncated pyramid, and the inner edge of the elastic wave and the inner edge of the cone are fitted and fixed to each other.

[0010] In some preferred embodiments, the cone further has a central portion, and the central portion is located between the inner edges of the cone.

[0011] In some more preferred embodiments, the central portion is recessed downward relative to the inner edge of the cone.

[0012] In some more preferred embodiments, the central portion and the cone are integral; and the voice coil is connected to the inner edge of the central portion or the cone.

[0013] In some preferred embodiments, the sound basin further has a folded ring, and the outer edge of the cone is fixed to the basin frame and / or the elastic wave fixing ring through the folded ring.

[0014] In some more preferred embodiments, the folding ring has at least one upper arched portion with a middle portion arched upward and at least one lower arched portion with a middle portion arched downward.

[0015] In some preferred embodiments, the elastic wave fixing ring is a hollow cylinder with open upper and lower ends as a whole, and the cylinder also has a contraction section that gradually contracts and tilts inward from bottom to top.

[0016] The utility model also adopts the following technical solutions:

[0017] A car audio system comprises the loudspeaker.

[0018] The utility model adopts the above solution, which has the following advantages compared with the prior art:

[0019] The speaker of the utility model is provided with a spring-loaded wave fixing ring on the basin frame, and the spring-loaded wave is arranged in the middle of the spring-loaded wave fixing ring and the cone, so that the space above the cone is fully utilized, and it can be ensured that when the speaker is operated at a large power, the sound basin will not produce a shaking that deviates from the vibration axis, that is, the speaker is allowed to operate at a large power, and the power is improved without increasing the overall height or thickness of the speaker too much. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0021] Figure 1 is a stereogram of a speaker according to an embodiment of the utility model;

[0022] Figure 2 A top view of a speaker according to an embodiment of the utility model;

[0023] Figure 3 for Figure 2 Sectional view along AA direction;

[0024] Figure 4 is an exploded view of a speaker according to an embodiment of the utility model;

[0025] Figure 5 A stereogram for a comparative example;

[0026] Figure 6 It is the frequency response curve diagram of embodiment and comparative example.

[0027] In the above figures,

[0028] 1. Basin stand;

[0029] 2. sound basin; 21. cone; 22. center portion; 23. folded ring; 231. upper arch portion; 232. lower arch portion;

[0030] 3. Voice coil;

[0031] 4. Magnetic circuit assembly; 41. U iron; 42. Magnetic steel; 43. Front piece; 44. Magnetic gap;

[0032] 5. elastic wave; 51. outer edge; 52. wave crest; 53. wave trough; 54. inner edge;

[0033] 6. Spring wave fixing ring; 60. Upper fixing surface; 61. Contraction section;

[0034] 7. Top cover. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention 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 present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] In the present invention, "inside" and "outside" are defined with reference to the center line of the voice coil of the speaker, and the direction closer to the center line of the voice coil is the inside, and the opposite is the outside. The directional words "upper", "lower" and "horizontal" are intended to facilitate the understanding of the structure of the speaker by those skilled in the art, and are not used to limit the state of the speaker after it is installed in the use scenario. For example, it can be installed on the upper surface, lower surface, upright surface or inclined surface of the vehicle interior component (such as sheet metal).

[0037] Example

[0038] The present embodiment provides a speaker, in particular, a vehicle-mounted speaker, which serves as a mid-range or high-range sound-generating unit of a vehicle-mounted audio system and can be installed on a vehicle for sound reproduction in the 350-20KHz frequency band.

[0039] Reference Figures 1 to 4 As shown, the speaker includes a basin frame 1, a sound cone 2, a voice coil 3 and a magnetic circuit assembly 4. The basin frame 1 is made of plastic that meets certain strength requirements and is used to support and protect other components. The sound cone 2 is a thin film as a whole and is fixed on the basin frame 1. The voice coil 3 includes a metal frame and a coil wound thereon. After the coil is energized, it can reciprocate along its center line (that is, the vibration axis of the speaker) under the magnetic field of the magnetic circuit assembly 4; one end of the voice coil 3 is fixed to the sound cone 2, thereby driving the sound cone 2 to vibrate and make sound. The magnetic circuit assembly 4 has a magnetic gap, and the coil part of the voice coil 3 is movably inserted into the magnetic gap, so as to cooperate with the magnetic field.

[0040] The cone 2 has a cone 21 with a protruding center. The magnetic circuit assembly 4 is arranged below the cone 2. Specifically, the cone 2 includes a center portion 22, a cone 21 and a folding ring 23 from the inside to the outside. The cone 21 is a hollow truncated cone or a truncated pyramid as a whole, and its inner edge is higher than the outer edge; the inner edges enclose a central through hole, and the center portion 22 is connected between the inner edges and covers the central through hole. The outer edge of the cone 21 is fixed to the basin frame 1 through the folding ring 23. The cone 21 and the center portion 22 are integrated and formed by cutting paper or fabric; the material of the folding ring 23 can be rubber, which is bonded to the cone 21 by glue. Specifically in this embodiment, in a top view, the contour of the center portion 22 is circular, and the outer contours of the cone 21 and the folding ring 23 are circular. The center portion 22 is recessed downward relative to the inner edge of the cone 21, and its outer contour is a part of a sphere or includes a part of a sphere. The fold ring 23 has at least one upper bulge 231 with a middle portion bulging upward and at least one lower bulge 232 with a middle portion bulging downward. Specifically in this embodiment, the upper bulge 231 and the lower bulge 232 of the fold ring 23 are sequentially connected and staggered.

[0041] The cone 2 as a whole encloses a space located inside thereof, in which at least a portion of the voice coil 3 is located, and even the upper portion of the magnetic circuit assembly 4 may be located; thereby significantly improving space utilization and facilitating reduction of the overall height or thickness of the speaker.

[0042] The magnetic circuit assembly 4 includes a U-iron 41, a magnetic steel 42 and a front piece 43. The middle part of the U-iron 41 is recessed downward to form a receiving groove, the magnetic steel 42 is stacked on the bottom of the U-iron 41, and the front piece 43 is stacked on the magnetic steel 42, so that the above-mentioned magnetic gap is formed between the inner surface of the receiving groove and the outer circumferential surface of the magnetic steel 42 and the front piece 43. Specifically, the front piece 43, the magnetic steel 42 and the U-iron 41 are bonded and fixed in sequence by glue. Among them, the U-iron 41 is fixed on the basin frame 1, specifically, it is bonded to the bottom of the basin frame 1 by glue. The basin frame 1 can also be provided with a flow hole for connecting the space inside and outside the basin frame 1.

[0043] The speaker also includes a spring wave 5 and a spring wave fixing ring 6. The spring wave 5 has a main body with multiple concentrically arranged corrugations. The spring wave 5 has a certain elasticity and can be formed by cutting and processing fabrics such as cloth. The spring wave fixing ring 6 is made of a material that meets certain strength requirements. The spring wave fixing ring 6 is connected to the basin frame 1, and the outer edge of the cone 21 is fixed to the basin frame 1 and / or the spring wave fixing ring 6; the outer edge of the spring wave 5 is fixed to the spring wave fixing ring 6, and the inner edge of the spring wave 5 is fixed to the cone 21. Specifically in this embodiment, the outer edge of the cone 21 is fixed (for example, by gluing) between the basin frame 1 and the spring wave fixing ring 6.

[0044] The elastic wave fixing ring 6 has an annular upper fixing surface 60, and the outer edge of the elastic wave 5 is attached to and fixed on the upper fixing surface 60. Among them, the upper fixing surface 60 is a step surface that is sunken relative to the outer edge of the elastic wave fixing ring 6, and it is horizontal. Therefore, the elastic wave 5 and the sound basin 2 and other flexible components are all located in the elastic wave fixing ring 6 and the basin frame 1, and will not be higher than the elastic wave fixing ring 6, providing better protection for the elastic wave 5 and the sound basin 2. The elastic wave 5 has a plurality of peaks and troughs located between its outer edge and inner edge, and the peaks are lower than the outer edge of the elastic wave 5 or are level. Furthermore, the inner edge of the cone 21 is also not higher than the outer edge of the elastic wave 5.

[0045] The inner edge of the wave damper 5 and the inner edge of the cone 21 are fixed to each other, for example, by gluing. Further, the inner edge of the wave damper 5 is also a hollow truncated cone or truncated pyramid, so as to better fit the cone 21.

[0046] The spring-spring fixing ring 6 is a hollow cylinder with open ends, the upper fixing surface 60 is formed on the upper end of the spring-spring fixing ring 6, and the lower end of the spring-spring fixing ring 6 is fixed on the basin frame 1. The cylinder also has a contraction section 61 that gradually contracts and tilts inward from bottom to top, and the inclination angle of the contraction section 61 does not exceed 30 degrees.

[0047] In this embodiment, an outer ring of the spring wave fixing ring 6 is added, and a spring wave 5 is added to the upper end of the sound cone 2. The spring wave 5 in this structure plays two roles: 1. It plays a good positioning role and the vibration system is stable; 2. It forms a cavity structure with the inverted sound cone 2 and the spring wave fixing ring 6 to enhance the bass. Under the premise of the same impedance, different powers can greatly increase the power of the speaker, the amplitude is about 3 times.

[0048] Comparative Example

[0049] Figure 5 A speaker of a comparative example is shown. Figure 5 As shown, the difference between the comparative example and the embodiment is that no elastic wave is provided, a hollow top cover 7 is provided above the sound basin 2, and the other parts are basically the same. Figure 5 As shown, the top cover 7 is fixed on the basin frame 1, and the upper surface of the sound basin 2 is covered therein.

[0050] Speaker frequency response curve comparison

[0051] The frequency response test was conducted on the loudspeakers of the embodiment and the comparative example, wherein the comparative example and the embodiment were debugged under the same radiation surface size. The frequency response curve is shown in FIG. Figure 6 As shown, according to the thickness of the curve color, the thinner line represents the frequency response curve of the comparative example, and the thicker line represents the frequency response curve of the embodiment. The sample power of the comparative example test is 5W, and the sample power of the embodiment is 15W. Figure 6 By comparison, it can be seen that the average sensitivity of the frequency response curve of the embodiment is about 3 dB higher than that of the comparative example.

[0052] The loudspeaker of the embodiment has the following advantages: the power is greatly improved, by about 3 times, and the sensitivity is high; at the same time, the overall height or thickness will not be excessively increased.

[0053] As shown in this specification and claims, the terms "comprises" and "includes" 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 device may also include other steps or elements.

[0054] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar thereto.

[0055] It is further 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 specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, 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.

[0056] The above embodiment is only for illustrating the technical concept and features of the utility model, and is a preferred embodiment. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model.

Claims

1. A speaker, comprising a basin frame, a sound basin, a spring, a voice coil for driving the sound basin to vibrate, and a magnetic circuit assembly for driving the voice coil to move, wherein the sound basin has a cone with a middle portion protruding upward, and the magnetic circuit assembly is arranged below the sound basin, characterized in that: The speaker also includes a spring wave fixing ring, which is connected to the basin frame, and the outer edge of the cone is fixed to the basin frame and / or the spring wave fixing ring; the outer edge of the spring wave is fixed to the spring wave fixing ring, and the inner edge of the spring wave is fixed to the cone.

2. The loudspeaker according to claim 1, characterized in that The spring fixing ring has an annular upper fixing surface, and the outer edge of the spring is attached to and fixed on the upper fixing surface.

3. The loudspeaker according to claim 2, characterized in that The elastic wave has a plurality of wave crests and wave troughs between its outer edge and inner edge, wherein the wave crests are lower than or level with the outer edge of the elastic wave; and / or, the upper fixing surface is a step surface that is sunken relative to the outer edge of the elastic wave fixing ring.

4. The loudspeaker according to claim 1, characterized in that The cone has an inner edge opposite to the outer edge. The inner edge of the elastic wave is a hollow truncated cone or a truncated pyramid. The inner edge of the elastic wave and the inner edge of the cone are fitted and fixed to each other.

5. The loudspeaker according to claim 1 or 4, characterized in that: The cone also has a center portion located between the inner edges of the cone.

6. The loudspeaker according to claim 5, characterized in that The central portion is recessed downward relative to the inner edge of the cone.

7. The loudspeaker according to claim 5, characterized in that The center portion and the cone are integral; the voice coil is connected to the center portion or the inner edge of the cone.

8. The loudspeaker according to claim 1, characterized in that The cone also has a folded ring, and the outer edge of the cone is fixed to the basin frame and / or the elastic wave fixing ring through the folded ring. The folded ring has at least one upper arched portion with an upward arch in the middle and at least one lower arched portion with a downward arch in the middle.

9. The loudspeaker according to claim 1, characterized in that The elastic wave fixing ring is a hollow cylinder with open upper and lower ends as a whole, and the cylinder also has a contraction section that gradually contracts and tilts inward from bottom to top.

10. A car audio system, characterized in that: Comprising the loudspeaker according to any one of claims 1 to 9.

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