A coaxial sound-generating unit with a common magnetic circuit and an electronic product

Abstract

This invention provides a coaxial sound-generating unit with a common magnetic circuit, mainly comprising: a magnetic circuit assembly for providing a magnetic field, the magnetic circuit assembly being generally arranged in a ring; a first vibration assembly for converting electrical signals into sound signals, the first vibration assembly being positioned above the magnetic circuit assembly; and a second vibration assembly for converting electrical signals into sound signals, the second vibration assembly being positioned below the magnetic circuit assembly; wherein the first vibration assembly, the second vibration assembly, and the magnetic circuit assembly are coaxially arranged. This invention, through the common magnetic circuit structure of dual tweeter vibration assemblies, improves magnetic circuit efficiency, makes reasonable use of space, and reduces production costs and difficulties. Simultaneously, combined with dual horn technology, it can effectively improve treble performance and enhance sound quality.

Description

Technical Field

[0001] This invention relates to the field of loudspeaker technology, and in particular to a coaxial sound-generating unit with a common magnetic circuit and electronic products. Background Technology

[0002] Currently, loudspeakers with horns, such as the coaxial loudspeaker with a horn disclosed in Patent Document 1, can improve the extension of high frequencies through the horn. Such loudspeakers generally have a tweeter diaphragm structure, which limits the high-frequency performance. Alternatively, they may use a structure that combines a tweeter diaphragm and a woofer diaphragm. However, such coaxial loudspeakers require two corresponding magnetic circuits to coordinate the tweeter and woofer, which makes production difficult and costly, and has its shortcomings.

[0003] Patent document 1CN202022983509.6. Summary of the Invention

[0004] To avoid the shortcomings of existing technologies, this invention provides a coaxial sound unit with a common magnetic circuit, achieving high-quality high-frequency performance at low cost.

[0005] The present invention solves the technical problem by adopting the following technical solution: a coaxial sound generating unit with a common magnetic circuit, comprising:

[0006] A magnetic circuit assembly for providing a magnetic field, the magnetic circuit assembly being generally arranged in a ring shape;

[0007] A first vibration component for converting electrical signals into sound signals, the first vibration component being disposed above the magnetic circuit component;

[0008] A second vibration component for converting electrical signals into sound signals is disposed below the magnetic circuit component;

[0009] The first vibration component, the second vibration component, and the magnetic circuit component are arranged coaxially.

[0010] In several embodiments, the magnetic circuit assembly includes a first pole core, a second pole core, and a magnet arranged coaxially and sequentially from the inside to the outside;

[0011] A first horn is inserted above the first pole core, and the second vibration component is located below the first pole core. The first pole core and the first horn form a channel for the sound signal of the second vibration component to be transmitted.

[0012] A second horn is arranged around the outside of the first horn. The first vibration component is arranged between the magnetic circuit component and the second horn, and the positions of the first vibration component, the magnet, and the second pole core are corresponding. The gap between the second horn and the first horn forms a channel for the sound signal of the first vibration component to be transmitted.

[0013] In several embodiments, an upper plate is provided above the magnet, and there is a gap between the upper plate and the second pole core. A bottom plate is provided below the magnet, and there is a gap between the bottom plate and the first pole core. An aluminum ring is provided between the bottom plate, the first pole core, and the second pole core.

[0014] In several embodiments, the first vibration assembly includes a first support, a first diaphragm, a first voice coil, and clips. The first support is connected to an upper plate and is used to fix the first diaphragm. The position of the first diaphragm corresponds to the gap between the second horn and the first horn. A plurality of clips are clamped and disposed at the inner and outer rings of the first diaphragm. The clips are respectively located between the first support and the upper plate and between the first horn and the first pole core. The first voice coil is connected to the first diaphragm and extends into the gap between the upper plate and the second pole core.

[0015] In several embodiments, the second vibration assembly includes a second support, a second diaphragm, and a second voice coil. The second support is connected to a base plate and is used to fix the second diaphragm. The second voice coil is disposed on the second diaphragm and extends between the base plate and the first pole core.

[0016] In several embodiments, the concave surface of the second diaphragm faces the first electrode core, and a phase plug is filled between the first electrode core and the second diaphragm.

[0017] In several embodiments, a rear cover is provided below the base plate, the rear cover surrounds the second vibration assembly, and the rear cover has a cavity that corresponds to the convex surface of the second diaphragm.

[0018] In several embodiments, the gap between the first horn and the second horn includes segment one, segment two and segment three, segment one being close to the first diaphragm and segment one gradually narrowing towards segment two, and segment three gradually widening from the position close to segment two.

[0019] And an electronic product having a coaxial sound-generating unit with the aforementioned common magnetic circuit, such as a mobile phone or a speaker.

[0020] The present invention has the following beneficial effects:

[0021] This invention improves magnetic circuit efficiency, makes better use of space, and reduces production costs and difficulties through the common magnetic circuit structure of the dual high-frequency vibration components. At the same time, combined with the dual horn combination, it can effectively improve high-frequency performance and enhance sound quality. Attached Figure Description

[0022] The accompanying drawings described herein are for illustrative purposes only and do not represent all possible implementations, nor should they be considered as limiting the scope of the invention.

[0023] Figure 1 The overall structure of the coaxial sound-generating unit with common magnetic circuit of Embodiment 1 is schematically shown;

[0024] Figure 2 schematically shown Figure 1 The cross-sectional structure;

[0025] Figure 3 schematically shown Figure 2 A locally magnified structure;

[0026] Figure 4 schematically shown Figure 1 The explosive structure;

[0027] Figure 5 schematically shown Figure 4 The enlarged structure of the first vibration component. Detailed Implementation

[0028] The embodiments of the present invention will be described in detail below. In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0029] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the invention.

[0031] For example, expressions such as "in a certain direction", "along a certain direction", "relative", "upper or lower side" indicate relative or absolute configuration. They not only indicate such configuration in a strict sense, but also indicate a state of relative displacement with tolerance or with an angle or distance that can achieve the same level of functionality.

[0032] Example 1

[0033] like Figures 1-4 As shown, the coaxial sound-generating unit with common magnetic circuit in this embodiment is mainly composed of magnetic circuit assembly 10, first vibration assembly 20, second vibration assembly 30, first horn 40, second horn 50, phase plug 60 and rear cover 70, thus forming a speaker structure.

[0034] Specifically, the magnetic circuit assembly 10 is used to provide a magnetic field. It is generally arranged in a ring shape and mainly consists of a ring-shaped first pole core 11, a second pole core 12, a magnet 13, an upper plate 14, a bottom plate 15, and an aluminum ring 16. The first pole core 11, the second pole core 12, and the magnet 13 are coaxial and arranged sequentially from the inside out. The first pole core 11 is located at the very center, and the second pole core 12 is nested close to the periphery of the first pole core 11. There is a certain radial gap between the magnet 13 and the second pole core 12. The upper plate 15 is located above the magnet 13 and faces the second pole core 12. The upper plate 15 extends outward beyond the magnet 13 and in the radial direction, but does not contact the second pole core 12. That is, there is a gap between the upper plate 15 and the second pole core 12 that is smaller than the gap between the magnet 13 and the second pole core 12. Correspondingly, the base plate 15 is fixed below the magnet 13. One end of the base plate 15 also extends radially to the outside of the magnet 13 but does not contact the first pole core 11. Thus, there is a gap between the base plate 15 and the first pole core 11 in the radial direction, and there is a distance between the base plate 15 and the first pole core 11 and the second pole core 12 in the axial direction. This distance is filled by the aluminum ring 16, thus forming a complete loudspeaker magnetic circuit structure.

[0035] like Figure 2 As shown, the first horn 40 is inserted from above onto the first pole core 11, which is a stepped annular structure with a roughly Z-shaped structure in the axial cross section. One end of the first horn 40 is inserted into the stepped surface inside the first pole core 11. The second vibration component 30 is located below the first pole core 11. The first pole core 11 and the first horn 40 together form a channel for the sound signal of the second vibration component 30 to be transmitted.

[0036] Meanwhile, a second horn 50 is arranged around the outside of the first horn 40. The first vibration component 20 is arranged between the magnetic circuit component 10 and the second horn 50, and the positions of the first vibration component 20, the magnet 13, and the second pole core 12 correspond to each other. The gap between the second horn 50 and the first horn 40 forms a channel for the sound signal of the first vibration component 20 to be transmitted.

[0037] The first vibration assembly 20 includes a first support 21, a first diaphragm 22, a first voice coil 23, and clamps 24. The first support 21 is connected to the upper plate 14 and is used to fix the first diaphragm 22. The position of the first diaphragm 22 corresponds to the gap between the second horn 50 and the first horn 40. Multiple clamps 24 are clamped at the inner and outer rings of the first diaphragm 22, that is, two clamps 24 are clamped at the inner ring position of the first diaphragm 22, and two clamps 24 are also clamped at the outer ring position for support.

[0038] Thus, the clips 24 are respectively positioned between the first bracket 21 and the upper plate 14 and between the first horn 40 and the first pole core 11 for connection and fixation. The inner ring of the first diaphragm 22 is located between the first horn 40 and the first pole core 11, and the outer ring of the first diaphragm 22 is located between the first bracket 21 and the upper plate 14.

[0039] The first voice coil 23 is connected to the first diaphragm 22. The first voice coil 23 extends into the gap between the upper plate 14 and the second pole core 12, and converts the electrical signal into an acoustic signal through the first vibration component 20.

[0040] Specifically, the gap between the first horn 40 and the second horn 50 includes segment 101, segment 202 and segment 303. Segment 101 is close to the first diaphragm 22 and has a gradually narrowing trend towards segment 202. Segment 303 has a gradually widening trend starting from the position close to segment 202. That is, the channel formed between the first horn 40 and the second horn 50 first narrows and then widens, which improves the treble effect.

[0041] Furthermore, the second vibration assembly 30 includes a second support 31, a second diaphragm 32, and a second voice coil 33. The second support 31 is connected to the base plate 15 and is used to fix the second diaphragm 32. The second voice coil 33 is disposed on the second diaphragm 32 and extends between the base plate 15 and the first pole core 11. The concave surface of the second diaphragm 32 faces the first pole core 11. A phase plug 60 is filled between the first pole core 11 and the second diaphragm 32.

[0042] Here, the position of the second diaphragm 32 corresponds to the through holes in the first pole core 11 and the first horn 40. The sound-generating channel is formed by the through holes in the first pole core 11 and the first horn 40. The inner diameters of the first pole core 11 and the first horn 40 are the same at the contact position. The through holes in the first horn 40 gradually expand and diverge into a trumpet-shaped structure. Thus, the electrical signal is converted into an acoustic signal by the first vibration component 20.

[0043] Meanwhile, a rear cover 70 is provided below the base plate 15. The rear cover 70 surrounds the second vibration component 30. The rear cover 70 has a cavity 71 inside. The cavity 71 corresponds to the convex surface of the second diaphragm 32, giving the second diaphragm 32 a certain space for movement.

[0044] In summary, the dual high-frequency common magnetic circuit design adopted in this invention has the characteristics of high magnetic circuit efficiency and low cost. Combined with the dual horn structure, it can effectively improve high-frequency performance. Moreover, the horn is made of aluminum alloy, which has high strength and low resonance, thus improving product performance.

[0045] The examples, embodiments, and particular forms of the invention illustrated have been shown and described in detail in the accompanying drawings and foregoing description, and should also be considered illustrative rather than restrictive. The description of a particular feature in one embodiment does not imply that those particular features must be limited to that one embodiment. Features of one embodiment can be used in combination with features of other embodiments, as will be understood by those skilled in the art, whether or not explicitly stated. Exemplary embodiments have been shown and described, and all variations and modifications fall within the spirit of the invention and are intended to be protected.

Claims

1. A coaxial sound-generating unit with a common magnetic circuit, comprising: A magnetic circuit assembly for providing a magnetic field, the magnetic circuit assembly being arranged in a ring, the magnetic circuit assembly including a first pole core, a second pole core and a magnet arranged coaxially and sequentially from the inside to the outside, a first horn inserted above the first pole core, the first pole core and the first horn forming a channel for the sound signal of a second vibration component to be transmitted, a second horn being arranged around the outside of the first horn, a first vibration component being disposed between the magnetic circuit assembly and the second horn, and the positions of the first vibration component, the magnet and the second pole core corresponding to each other, the gap between the second horn and the first horn forming a channel for the sound signal of the first vibration component to be transmitted; A first vibration component for converting electrical signals into sound signals is disposed above a magnetic circuit component. The first vibration component includes a first support, a first diaphragm, a first voice coil, and clips. The first support is connected to an upper plate and is used to fix the first diaphragm. The position of the first diaphragm corresponds to the gap between the second horn and the first horn. A plurality of clips are clamped and disposed at the inner and outer rings of the first diaphragm. The clips are respectively located between the first support and the upper plate and between the first horn and the first pole core. The first voice coil is connected to the first diaphragm and extends into the gap between the upper plate and the second pole core. A second vibration component for converting electrical signals into sound signals is disposed below the magnetic circuit component. The second vibration component includes a second support, a second diaphragm and a second voice coil. The second support is connected to the base plate and is used to fix the second diaphragm. The second voice coil is disposed on the second diaphragm and extends between the base plate and the first pole core. The first vibration component, the second vibration component, and the magnetic circuit component are arranged coaxially. An upper plate is provided above the magnet, and there is a gap between the upper plate and the second pole core. A bottom plate is provided below the magnet, and there is a gap between the bottom plate and the first pole core. An aluminum ring is provided between the bottom plate, the first pole core, and the second pole core. The concave surface of the second diaphragm faces the first electrode core, and a phase plug is filled between the first electrode core and the second diaphragm; A rear cover is provided below the base plate, the rear cover surrounds the second vibration component, and the rear cover has a cavity that corresponds to the convex surface of the second diaphragm. The gap between the first horn and the second horn includes segment one, segment two and segment three. Segment one is close to the first diaphragm and has a gradually narrowing trend towards segment two. Segment three has a gradually widening trend starting from the position close to segment two.

2. An electronic product, characterized in that, A coaxial sound-generating unit having a common magnetic circuit as described in claim 1.

Images