CN220156646U - Voice coil skeleton assembly and loudspeaker - Google Patents

Abstract

The utility model provides a voice coil skeleton assembly and a loudspeaker with the same. The voice coil framework assembly comprises a flat voice coil and a voice coil framework, the voice coil framework comprises a body part and a reinforcing part, the body part is in a flat cylinder shape with two ends open along the axial direction of the flat voice coil, and the reinforcing part is arranged at the opening at one end of the body part and is connected with the edge of the body part; the flat voice coil is fixedly arranged in the body part, and a preset interval L is arranged between the outer wall of the flat voice coil and the inner wall of the body part in the length direction and the width direction of the flat voice coil. According to the voice coil skeleton assembly and the loudspeaker, the voice coil skeleton is arranged to replace a flat voice coil to be bonded with the top of the voice coil, so that the bonding strength of the voice coil is improved; the voice coil framework is fixed through the body part, so that the flat voice coil is convenient to assemble, and the problem that the flat voice coil is easy to generate convex deformation after standing or vibrating is solved; the body part is structurally reinforced by the reinforcing part, the overall strength of the voice coil framework is high, the stability is good, and the voice coil framework is not easy to deform and break.

Description

Voice coil skeleton assembly and loudspeaker

Technical Field

The utility model relates to the technical field of electroacoustic products, in particular to a voice coil skeleton assembly and a loudspeaker.

Background

The speaker is an important acoustic component of the portable electronic device, is used for completing the conversion between the electric signal and the sound signal, and is an energy conversion device. With the miniaturization development of electronic devices such as mobile phones, the size design of a speaker is also more and more challenging.

The loudspeaker generally comprises a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibrating diaphragm and a voice coil combined with the vibrating diaphragm into a whole, the magnetic circuit system comprises a magnet and a magnetic gap, and the voice coil is arranged in the magnetic gap. In order to achieve miniaturization and thinness of the loudspeaker, the traditional method adopts a flat voice coil, so that the voice coil plane is perpendicular to the vibrating diaphragm plane, occupation of the voice coil to the thickness of the loudspeaker can be effectively reduced, the vibration direction of the voice coil when the vibration sounding device works is changed, and the vibration space can be increased and the product performance can be improved while the thin design of the product is facilitated.

However, in the prior art, the combination of the flat voice coil and the diaphragm dome has the following problems: 1. the flat voice coil has poor dimensional stability, is easy to deform in the long-time placement or vibration process, and affects the acoustic performance; 2. in the process of winding and assembling the voice coil, the long shaft shape of the flat voice coil is easy to bulge outwards, and the yield is low; 3. the flatness of the bonding position of the flat voice coil and the diaphragm dome is difficult to ensure, the bonding strength is not high, and the reliability is poor. The above problems have become a bottleneck in the development of flat voice coils for use in light and thin speakers.

Disclosure of Invention

In order to solve the existing technical problems, the utility model provides a voice coil skeleton assembly and a loudspeaker, which can prevent the voice coil from deforming and improve the bonding strength of the voice coil.

In order to achieve the above object, the technical solution of the embodiment of the present utility model is as follows:

in one aspect, an embodiment of the present utility model provides a voice coil bobbin assembly, including a flat voice coil and a voice coil bobbin for fixing the flat voice coil, where the voice coil bobbin includes a body portion having a flat cylindrical shape with openings at both ends in an axial direction of the flat voice coil, and a reinforcing portion disposed at an opening at one end of the body portion and connected to an edge of the body portion to enhance structural strength of the body portion; the flat voice coil is fixedly arranged in the body part, and a preset interval L is arranged between the outer wall of the flat voice coil and the inner wall of the body part in the length direction and the width direction of the flat voice coil.

In one embodiment, the preset distance L satisfies the following condition: l is more than or equal to 0.03mm and less than or equal to 0.1mm.

In one embodiment, the body portion and the reinforcing portion are of an integrally formed construction.

In one embodiment, the reinforcing portion includes at least one first reinforcing rib and at least one second reinforcing rib, the first reinforcing rib is disposed along the length direction and both ends are respectively connected to the edges of the body portion, and the second reinforcing rib is disposed along the width direction and both ends are respectively connected to the edges of the body portion.

In one embodiment, the width of the first reinforcing rib and the second reinforcing rib is not less than 0.3mm.

In one embodiment, the depth D of the body portion in the flat voice coil axis direction is greater than the depth D of the flat voice coil.

In one embodiment, the body portion is provided with a chamfer at a junction of the length direction and the width direction, and a chamfer radius R of the body portion is smaller than a chamfer radius R of the flat voice coil.

In one embodiment, the chamfer radius R of the body part is more than or equal to 0.05mm; the chamfer radius r of the flat voice coil is more than or equal to 0.5mm.

On the other hand, the embodiment of the utility model also provides a loudspeaker, which comprises a shell, a vibrating diaphragm arranged in the shell, a ball top connected with the vibrating diaphragm, a magnetic circuit assembly arranged in the shell and provided with a magnetic gap, and any voice coil skeleton assembly, wherein the top side of the body part is connected with the ball top, and the bottom side of the body part is suspended in the magnetic gap.

In one embodiment, an elastic centering support is provided between the bottom side of the body portion and the housing.

The voice coil skeleton assembly and the loudspeaker with the voice coil skeleton assembly have the following beneficial effects: by arranging the voice coil framework to replace the flat voice coil to be bonded with the top of the diaphragm, compared with the method of directly bonding the flat voice coil with the top of the diaphragm, the bonding area is larger, the bonding strength is higher, and the reliability is strong; the voice coil framework is fixed through the body part with the cylindrical structure, and the preset distance L is arranged between the outer wall of the flat voice coil and the inner wall of the body part, so that the assembly of the flat voice coil is facilitated, the overall dimension of the periphery of the flat voice coil can be further restrained, and the problem that the flat voice coil is easy to generate convex deformation after standing or vibrating is solved; the body part is structurally reinforced by the reinforcing part, the overall strength of the voice coil framework is high, the stability is good, and the voice coil framework is not easy to deform and break.

Drawings

Fig. 1 is a schematic diagram of a split structure of a speaker according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional block diagram of one direction of the speaker of FIG. 1;

FIG. 3 is a cross-sectional view of the speaker of FIG. 1 in another direction;

FIG. 4 is a schematic diagram of a voice coil bobbin assembly according to an embodiment of the present utility model installed in a speaker;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is a schematic view of the audio coil skeleton assembly of FIG. 4 in one orientation;

fig. 7 is a schematic view of the voice coil skeleton assembly of fig. 4 in another direction.

The reference numerals of the elements in the drawings are as follows: a basin stand 10; injection molding the polar plate 11; a front cover 20; a bracket 21; a diaphragm 30; a dome 40; a voice coil bobbin 50; a body portion 51; a reinforcing portion 52; a first reinforcing rib 521; second reinforcing ribs 522; a flat voice coil 60; centering support 70; a fixing portion 71; an elastic deformation portion 72; magnetic steel 80; a magnetic shield 90.

Detailed Description

The technical scheme of the utility model is further elaborated below by referring to the drawings in the specification and the specific embodiments.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The embodiment of the utility model provides a voice coil skeleton assembly and a loudspeaker with the voice coil skeleton assembly, and the loudspeaker can be used for sounding of electronic equipment, for example, in equipment such as watches, earphones, VR equipment, AR equipment and the like. Referring to fig. 1 to 3, the speaker includes a voice coil bobbin assembly, a housing, a diaphragm 30, a dome 40, and a magnetic circuit assembly.

Specifically, the housing may include a tub 10, a front cover 20, and a magnet cover 90. The frame 10 provides mounting carriers for the components of the speaker, and the frame 10 may have a square shape, a round shape, or the like, so long as a space for fixing the diaphragm 30, the voice coil bobbin assembly, and the magnetic circuit assembly can be formed inside the frame 10, and the specific shape of the frame 10 is not limited. The basin stand 10 is preferably made of metal or alloy material, has good heat dissipation performance, improves the acoustic performance of the loudspeaker, and prolongs the service life.

The front cover 20 covers one side of the basin frame 10, and the vibrating diaphragm 30 is arranged in the basin frame 10 and is fixedly connected with the front cover 20 through the bracket 21. The front cover 20 can protect the diaphragm 30, prevent the diaphragm 30 from being damaged, and further improve the waterproof performance of the speaker. The support 21 has an annular structure and can be clamped between the front cover 20 and the diaphragm 30 through glue adhesion so as to provide a vibration space for the diaphragm 30 to vibrate and sound. The edge part of the vibrating diaphragm 30 can be adhered and fixed with the bracket 21, and the center hollowed-out part of the vibrating diaphragm 30 can be adhered and connected with the dome 40, so that the sensitivity and frequency response of the whole vibrating diaphragm 30 are improved.

The magnetic cover 90 covers the other side of the basin frame 10 relative to the front cover 20, the magnetic circuit assembly may include two magnetic steels 80, the polarities of the two magnetic steels 80 are opposite and both can be adhered and fixed on one side of the magnetic cover 90 facing the front cover 20, the two magnetic steels 80 are oppositely arranged at intervals in the width direction of the shell and both extend along the length direction of the shell, so that a long and narrow magnetic gap extending along the length direction of the shell is formed between the two magnetic steels 80. The basin stand 10 can be provided with the injection molding polar plate 11 which is correspondingly arranged with the magnetic steel 80 in the thickness direction of the shell, and the magnetic field distribution can be optimized, the magnetic field intensity is enhanced, and the acoustic performance of the loudspeaker is further improved by respectively arranging the injection molding polar plate 11 made of magnetic conductive materials and the magnetic cover 90 on the two opposite sides of the magnetic steel 80.

Referring to fig. 6 and 7, the voice coil bobbin assembly includes a flat voice coil 60 and a voice coil bobbin 50, and an axial direction of the flat voice coil 60 is perpendicular to a vibration direction of the diaphragm 30. The voice coil bobbin 50 includes a body 51 and a reinforcing portion 52, the body 51 is in a flat tubular shape with two ends open along the axial direction, and the reinforcing portion 52 is disposed at an opening at one end of the body 51 and connected to an edge of the body 51 to enhance the structural strength of the body 51. The flat voice coil 60 may be installed in the body 51 from the opening at the other end of the body 51, and a predetermined distance L between the outer wall of the flat voice coil 60 and the inner wall of the body 51 is provided in the length direction and the width direction of the flat voice coil 60 for easy assembly. As shown in fig. 4 and 5, the voice coil bobbin 50 has a fixing effect of the flat voice coil 60, and the top side (wall surface in the longitudinal direction) of the body 51 is connected to the dome 40, for example, bonded, and the bottom side of the body 51 is suspended in a magnetic gap formed by the two magnetic steels 80. When external driving current enters the flat voice coil 60, the flat voice coil 60 is arranged in a magnetic field formed by the magnetic steel 80, and the current in the flat voice coil 60 arranged in the magnetic field changes, so that the flat voice coil 60 is vibrated along the plane where the flat voice coil 60 is subjected to Lorentz force, and the flat voice coil 60 vibrates to drive the dome 40 to vibrate, so that the vibration is transmitted to the vibrating diaphragm 30 to make the vibrating diaphragm 30 vibrate and sound. Due to the flat structure of the flat voice coil 60, the size restriction in the vibration direction of the voice coil is small, so that the flat voice coil 60 can obtain a large vibration space, and the amplitude is increased, thereby improving the performance of the speaker. In this way, by arranging the voice coil framework 50 to replace the flat voice coil 60 to bond with the dome 40, compared with directly bonding the flat voice coil 60 with the diaphragm 30 assembly, the bonding area is larger, the bonding strength is higher, and the reliability is strong; the voice coil framework 50 is fixed by arranging the cylindrical body part 51, and the preset distance L is arranged between the flat voice coil 60 and the peripheral coil of the body part 51, so that the assembly of the flat voice coil 60 is facilitated, the external dimension of the peripheral coil of the flat voice coil 60 can be further restrained, and the problem that the flat voice coil 60 is easy to generate convex deformation after standing or vibrating is solved; through setting up reinforcing part 52 and carrying out structural reinforcement to body portion 51, voice coil skeleton 50 bulk strength is high, and stability is good, difficult deformation fracture.

Preferably, referring to fig. 6, the preset spacing L satisfies the following condition: when L is more than or equal to 0.03mm and less than or equal to 0.1mm, the flat voice coil 60 is convenient to assemble and is not easy to be outwards deformed after standing or vibrating.

Further, the body portion 51 and the reinforcing portion 52 may be an integrally formed structure. Specifically, the reinforcing part 52 may include at least one first reinforcing rib 521 and at least one second reinforcing rib 522, and the first reinforcing rib 521 and the second reinforcing rib 522 are vertically arranged. In the illustrated embodiment, one first reinforcing rib 521 extends along the length direction of the flat voice coil 60, three second reinforcing ribs 522 extend along the width direction of the flat voice coil 60, and the three second reinforcing ribs 522 are respectively located at the middle and two ends of the opening at one end of the body portion 51, and the flat voice coil 60 can be connected with the second reinforcing ribs 522 by bonding to fix the flat voice coil 60 in the body portion 51. Thus, the first reinforcing ribs 521 and the second reinforcing ribs 522 vertically arranged can effectively increase the structural strength of the body portion 51, and can form a plurality of rectangular hollows, thereby reducing the overall weight of the voice coil frame 50, keeping the structure of the voice coil frame 50 stable and facilitating the generation of vibration thereof. The whole voice coil bobbin 50 is preferably made of aluminum, alloy, or organic polymer material, which has high strength, light weight, stable structure, and no deformation, and the width of the first and second reinforcing ribs 521 and 522 is preferably not less than 0.3mm. Of course, in other embodiments, the first reinforcing ribs 521 and the second reinforcing ribs 522 may be other numbers, so long as the main body 51 is not easy to deform, and the specific structure is not limited herein.

Referring to fig. 5, in order to make the bonding area between the flat voice coil 60 and the dome 40 larger and the bonding strength higher, the depth D of the body 51 in the axial direction needs to be larger than the depth D of the flat voice coil 60, which solves the problems of insufficient width and low strength caused by directly bonding the flat voice coil 60 to the dome 40, and simultaneously reduces the process bonding difficulty, thereby facilitating the production and assembly of the speaker. Further, referring to fig. 6, the chamfer radius R of the body 51 may be smaller than the chamfer radius R of the flat voice coil 60, and the chamfer radius R of the body 51 may be smaller as much as the processing design allows, so as to increase the length of the bonding surface between the voice coil bobbin 50 and the dome 40, and further increase the bonding area. Specifically, the flat voice coil 60 is generally formed by winding conductive wires, and the flat voice coil 60 generates a larger chamfer radius in the winding process, so that the chamfer radius R of the body 51 is more than or equal to 0.05mm, and the chamfer radius R of the flat voice coil 60 is more than or equal to 0.5mm in order to reduce the design and processing difficulty.

In order to prevent the flat voice coil 60 and the voice coil bobbin 50 from being polarized during vibration, an elastic centering support 70 is fixed between the bottom side of the body portion 51 and the case. Referring to fig. 4, in the embodiment shown, the centering support 70 includes a fixing portion 71 for connecting to the bottom side of the body portion 51 and an elastic deformation portion 72 for connecting to the basin stand 10, where the elastic deformation portion 72 may be provided with two bending pieces respectively disposed on two ends of the fixing portion 71 along the length direction of the housing, and the elastic deformation portion 72 is preferably an arc bending piece, so that the compliance of the centering support 70 can be increased. When assembled, the fixing portion 71 may be connected to the bottom side of the voice coil frame 50 by means of bonding to define the mounting position of the centering support 70 on the voice coil frame 50, and the elastic deformation portion 72 may be connected to the inner sidewall of the tub frame 10 by means of screws or bonding. In this way, the elastic deformation portion 72 on the centering support plate 70 deforms along with the voice coil framework 50 in the process that the flat voice coil 60 drives the voice coil framework 50 to vibrate, so as to limit the overall vibration of the flat voice coil 60, and further effectively prevent poor acoustic performance caused by polarization in the vibration process of the flat voice coil 60 and the voice coil framework 50.

In summary, according to the voice coil skeleton assembly and the speaker having the same of the embodiment of the present utility model, the voice coil skeleton 50 is provided to replace the flat voice coil 60 to bond with the dome 40, and compared with directly bonding the flat voice coil 60 with the diaphragm 30 assembly, the bonding area is larger, the bonding strength is higher, and the reliability is strong; the voice coil framework 50 is fixed by the body part 51 with a cylindrical structure, and a preset interval L is arranged between the outer wall of the flat voice coil 60 and the inner wall of the body part 51, so that the assembly of the flat voice coil 60 is facilitated, the external dimension of the periphery of the flat voice coil 60 can be further restrained, and the problem that the flat voice coil 60 is easy to generate convex deformation after standing or vibrating is solved; through setting up reinforcing part 52 and carrying out structural reinforcement to body portion 51, voice coil skeleton 50 bulk strength is high, and stability is good, difficult deformation fracture.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. The voice coil framework assembly is characterized by comprising a flat voice coil and a voice coil framework for fixing the flat voice coil, wherein the voice coil framework comprises a body part and a reinforcing part, the body part is in a flat cylinder shape with two ends open along the axial direction of the flat voice coil, and the reinforcing part is arranged at the opening at one end of the body part and connected with the edge of the body part so as to strengthen the structural strength of the body part; the flat voice coil is fixedly arranged in the body part, and a preset interval L is arranged between the outer wall of the flat voice coil and the inner wall of the body part in the length direction and the width direction of the flat voice coil.

2. The voice coil former assembly of claim 1, wherein the preset spacing L satisfies the following condition: l is more than or equal to 0.03mm and less than or equal to 0.1mm.

3. The voice coil former assembly of claim 1, wherein said body portion and said reinforcing portion are of unitary construction.

4. A voice coil bobbin assembly according to claim 3, wherein the reinforcing portion comprises at least one first reinforcing rib provided along the length direction and having both ends connected to the edges of the body portion, respectively, and at least one second reinforcing rib provided along the width direction and having both ends connected to the edges of the body portion, respectively.

5. The voice coil former assembly of claim 4, wherein the first and second ribs have a width of not less than 0.3mm.

6. The voice coil bobbin assembly of claim 1, wherein the depth D of the body portion in the direction of the flat voice coil axis is greater than the depth D of the flat voice coil.

7. The voice coil bobbin assembly of claim 6, wherein the body portion is provided with a chamfer at a junction of the length direction and the width direction, and wherein a chamfer radius R of the body portion is smaller than a chamfer radius R of the flat voice coil.

8. The voice coil former assembly of claim 7, wherein said body portion has a chamfer radius R ≡0.05mm; the chamfer radius r of the flat voice coil is more than or equal to 0.5mm.

9. A loudspeaker, comprising a housing, a diaphragm arranged in the housing, a dome connected to the diaphragm, a magnetic circuit assembly arranged in the housing and formed with a magnetic gap, and a voice coil skeleton assembly according to any one of claims 1 to 8, wherein the top side of the body is connected to the dome and the bottom side is suspended in the magnetic gap.

10. The loudspeaker of claim 9, wherein an elastic centering tab is provided between the bottom side of the body portion and the housing.