A voice coil for a sound generating device and a sound generating device

Abstract

The present invention discloses a voice coil for a sound generating device and the sound generating device. The sound generating device includes a voice coil body and a reinforcing portion. The voice coil body includes a voice coil bobbin and voice coil wire. The reinforcing portion includes a first reinforcing portion and a second reinforcing portion. The first reinforcing portion is disposed inside the voice coil bobbin, and the second reinforcing portion is disposed outside the voice coil bobbin. The reinforcing portion is configured to enhance the high-frequency strength of the voice coil bobbin. By simultaneously providing the reinforcing portion inside and outside the voice coil bobbin, the present invention prevents the voice coil bobbin from deforming toward the side with lower strength due to the lower strength on one side, achieves an improvement in the high-frequency strength of the voice coil, and suppresses the splitting vibration generated by the voice coil at high frequencies. The voice coil reinforced by the internal and external reinforcing portions can reduce the sound distortion of the sound generating device and improve the high-frequency acoustic performance of the sound generating device.

Description

Technical Field

[0001] The present invention belongs to the technical field of electroacoustic conversion. Specifically, the present invention relates to a voice coil for a sound generating device and a sound generating device. Background Art

[0002] A loudspeaker is a transducer that converts an electrical signal into a sound signal. Audio electrical energy causes a cone or diaphragm to vibrate through electromagnetic, piezoelectric, or electrostatic effects and resonate with the surrounding air to produce sound. The loudspeaker is the weakest component in an audio device, yet it is the most important component for the audio effect.

[0003] The voice coil can be said to be the heart of the loudspeaker. The performance of the voice coil affects the sound pressure frequency characteristics, sound pressure level, impedance curve, distortion, transient characteristics, loudspeaker parameters, sound quality, etc. of the loudspeaker, especially the power handling capacity and lifespan of the loudspeaker.

[0004] The voice coil bobbin in the prior art is usually made of a single layer of aluminum-magnesium alloy or polyimide film, and a reinforcing paper or other structure is added outside the voice coil to improve the strength of the voice coil. However, the strength of the voice coil bobbin of this structure is poor, which in turn affects the high-frequency acoustic performance of the loudspeaker. Summary of the Invention

[0005] An object of the present invention is to provide a voice coil for a sound generating device and a sound generating device.

[0006] According to a first aspect of the present invention, there is provided a voice coil for a sound generating device, comprising:

[0007] A voice coil body, the voice coil body comprising a voice coil bobbin and a voice coil wire wound around the outside of the voice coil bobbin;

[0008] A reinforcing portion, the reinforcing portion comprising a first reinforcing portion and a second reinforcing portion, the first reinforcing portion being disposed inside the voice coil bobbin, and the second reinforcing portion being disposed outside the voice coil bobbin;

[0009] The reinforcing portion is configured to enhance the high-frequency strength of the voice coil.

[0010] Optionally, the width of the first reinforcing portion along the axial direction of the voice coil bobbin is h1, and h1 is 5%-30% of the axial width of the voice coil bobbin.

[0011] Optionally, the width of the second reinforcing portion along the axial direction of the voice coil bobbin is h2, and h1 is equal to or unequal to h2.

[0012] Optionally, the first reinforcing portion and the second reinforcing portion are symmetrically disposed on both sides of the voice coil bobbin.

[0013] Optionally, the height difference between the first reinforcing part and the second reinforcing part along the axial direction of the voice coil bobbin is h3, and h3 is 5%-80% of h1.

[0014] Optionally, the material of the reinforcing part is one or a combination of more than one of aluminum-magnesium alloy, polyimide film, glass fiber, and glue.

[0015] Optionally, the materials of the first reinforcing part and the second reinforcing part are the same.

[0016] Optionally, the first reinforcing part is arranged in a ring shape.

[0017] Optionally, a plurality of through holes are provided on the side wall of the voice coil bobbin, and the plurality of through holes are uniformly arranged along the circumferential side of the voice coil bobbin.

[0018] According to a second aspect of the present invention, there is provided a sound generating device, including:

[0019] A housing and a vibration assembly located inside the housing;

[0020] The vibration assembly includes a diaphragm and the voice coil connected to the diaphragm.

[0021] Compared with the prior art, one technical effect of the present invention is that:

[0022] The present invention discloses a voice coil for a sound generating device, including a voice coil body and a reinforcing part. The voice coil body includes a voice coil bobbin and a voice coil wire wound around the outside of the voice coil bobbin. The reinforcing part includes a first reinforcing part and a second reinforcing part. The first reinforcing part is arranged inside the voice coil bobbin, and the second reinforcing part is arranged outside the voice coil bobbin; the reinforcing part is configured to enhance the high-frequency strength of the voice coil bobbin. By simultaneously arranging the reinforcing parts inside and outside the voice coil bobbin, the present invention achieves an improvement in the high-frequency strength of the voice coil.

[0023] Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear. Description of the Drawings

[0024] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0025] Figure 1 It is a schematic structural diagram of a voice coil for a sound generating device according to the present invention;

[0026] Figure 2 It is a top view of a voice coil for a sound generating device according to the present invention;

[0027] Figure 3For the present invention Figure 2 Cross-sectional view along A-A in the present invention;

[0028] Figure 4 Schematic diagram of the voice coil bobbin and reinforcement part of a voice coil for a sound generating device according to the present invention;

[0029] Figure 5 Schematic diagram of another voice coil bobbin and reinforcement part of a voice coil for a sound generating device according to the present invention;

[0030] Figure 6 Schematic diagram of yet another voice coil bobbin and reinforcement part of a voice coil for a sound generating device according to the present invention.

[0031] Wherein: 1 - voice coil bobbin; 2 - first reinforcement part; 3 - second reinforcement part; 4 - through hole; 5 - voice coil wire. Detailed implementation manners

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended as a limitation on the present invention or its application or use.

[0034] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be regarded as part of the specification.

[0035] In all examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Accordingly, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0037] Referring to Figure 1 、 Figure 2 and Figure 3 , the present invention discloses a voice coil for a sound generating device, comprising:

[0038] A voice coil body and a reinforcement part, wherein the voice coil body comprises a voice coil bobbin 1 and a voice coil wire 5 wound around the outside of the voice coil bobbin 1, the reinforcement part comprises a first reinforcement part 2 and a second reinforcement part 3, the first reinforcement part 2 is arranged inside the voice coil bobbin 1, and the second reinforcement part 3 is arranged outside the voice coil bobbin 1;

[0039] The reinforcing part is configured to enhance the high-frequency strength of the voice coil.

[0040] The voice coil former in the prior art is usually made of a single-layer aluminum-magnesium alloy or polyimide film, and a reinforcing paper or the like is added outside the voice coil to improve the strength of the voice coil. However, the strength of the voice coil former of this structure is poor, which in turn affects the high-frequency acoustic performance of the speaker. In the present invention, by simultaneously arranging reinforcing parts on the inner side and the outer side of the voice coil former 1, the voice coil former 1 is prevented from deforming towards the side with weaker strength due to lower strength on one side; moreover, by further defining the material, thickness dimension and setting position of the reinforcing part, the high-frequency strength of the voice coil can be improved, the splitting vibration generated by the voice coil at high frequencies can be suppressed, and finally it is applied to the sound generating device. The sound generating device can be a speaker. The voice coil reinforced by the inner and outer reinforcing parts can reduce the sound distortion of the sound generating device and improve the high-frequency acoustic performance of the sound generating device.

[0041] The high-frequency working range of the traditional sound generating device generally does not exceed 20KHz, while the high-frequency working range of the sound generating device provided with the voice coil of the present invention can reach 40KHz, greatly increasing the high-frequency ductility of the sound generating device.

[0042] Optionally, referring to Figure 6 , the width of the first reinforcing part 2 along the axial direction of the voice coil former 1 is h1, the width of the second reinforcing part 3 along the axial direction of the voice coil former 1 is h2, and the h1 is 5%-30% of the axial width of the voice coil former 1.

[0043] The voice coil former 1 is annularly arranged, so it has a long extension in its axial direction. The voice coil former 1 will be subjected to great vibration impacts during high-strength and high-frequency vibration processes. However, since the connection part between the voice coil former 1 and the sound generating device is generally located at the upper part of the voice coil former 1, the upper part of the voice coil former 1 receives the greatest vibration impact, and there is more stress concentrated on the upper part of the voice coil former 1. The upper part of the voice coil former 1 has become the main damaged area. Therefore, in the present invention, the first reinforcing part 2 with a width h1 of 5%-30% of the axial width of the voice coil former 1 is arranged on the inner side of the upper part of the voice coil former 1, which can specifically improve the strength of the vulnerable area of the upper part of the voice coil former 1 and achieve the protection of the inner side of the upper part of the voice coil former 1.

[0044] Similarly, the h2 can be 5%-30% of the axial width of the voice coil bobbin 1. On the outer side of the voice coil bobbin 1, the upper connection area is also the most vulnerable to damage. Therefore, in the present invention, the second reinforcing portion 3 with a width h2 of 5%-30% of the axial width of the voice coil bobbin 1 is provided on the upper outer side of the voice coil bobbin 1, so as to specifically improve the strength of the vulnerable area at the upper part of the voice coil bobbin 1 and achieve the protection of the upper outer side of the voice coil bobbin 1.

[0045] Optionally, the upper end of at least one of the first reinforcing portion 2 and the second reinforcing portion 3 is flush with the upper end of the voice coil bobbin 1.

[0046] It can be understood that in a specific embodiment, the upper end of the first reinforcing portion 2 is flush with the upper end of the voice coil bobbin 1, so that the structural strength of the inner side of the upper end of the voice coil bobbin 1 can be enhanced from the uppermost end and extends downward to the entire range where the first reinforcing portion 2 is provided, thus further enhancing the firmness and reliability of the connection part between the voice coil bobbin 1 and the sound generating device; in another specific embodiment, it can be that the upper end of the second reinforcing portion 3 is flush with the upper end of the voice coil bobbin 1, so that the structural strength of the outer side of the upper end of the voice coil bobbin 1 can be enhanced from the uppermost end and extends downward to the entire range where the second reinforcing portion 3 is provided, thus also enhancing the firmness and reliability of the connection part between the voice coil bobbin 1 and the sound generating device.

[0047] In yet another specific embodiment, referring to Figure 4 , the upper ends of both the first reinforcing portion 2 and the second reinforcing portion 3 are flush with the upper end of the voice coil bobbin 1, so as to further ensure that the structural strength of both sides of the upper end of the voice coil bobbin 1 is enhanced from the uppermost end and extends downward to the entire range where the reinforcing portion is provided, and the reinforcement on both sides will not cause the voice coil bobbin 1 to bend and deform towards the side with weaker strength, thus further enhancing the strength of the upper section of the voice coil bobbin 1 and ensuring the strength and connection life of the connection part between the voice coil bobbin 1 and the sound generating device.

[0048] Optionally, referring to Figure 5 , the upper ends of both the first reinforcing portion 2 and the second reinforcing portion 3 are lower than the upper end of the voice coil bobbin 1.

[0049] Since the voice coil is an important component of the sound generating device, the voice coil bobbin 1 may need to be bonded to other components, and the bonding of other components itself plays a role in enhancing the structural strength of the voice coil bobbin 1. Therefore, a bonding space needs to be left at the upper end of the voice coil bobbin 1, which requires setting the upper ends of both the first reinforcing portion 2 and the second reinforcing portion 3 to be lower than the upper end of the voice coil bobbin 1.

[0050] Optionally, refer to Figure 6 , where h1 is equal to h2, that is, the width of the first reinforcing part 2 along the axial direction of the voice coil bobbin 1 is equal to the width of the second reinforcing part 3 along the axial direction of the voice coil bobbin 1. The advantage of this setting is to balance the reinforcing effects on the inner and outer sides of the voice coil bobbin 1 and prevent the voice coil bobbin 1 from bending and deforming towards the side with weaker reinforcement.

[0051] Optionally, refer to Figure 4 and Figure 5 , where the first reinforcing part 2 and the second reinforcing part 3 are symmetrically arranged on both sides of the voice coil bobbin 1.

[0052] On the basis that the width of the first reinforcing part 2 along the axial direction of the voice coil bobbin 1 is equal to the width of the second reinforcing part 3 along the axial direction of the voice coil bobbin 1, symmetrically arranging the first reinforcing part 2 and the second reinforcing part 3 on both sides of the voice coil bobbin 1 further balances the strength on the inner and outer sides of the voice coil bobbin 1, ensures the strength during the reinforcement stage of the voice coil bobbin 1, and improves the high-frequency strength of the voice coil.

[0053] Optionally, refer to Figure 6 , where the height difference between the first reinforcing part 2 and the second reinforcing part 3 along the axial direction of the voice coil bobbin 1 is h3, and h3 is 5% - 80% of h1.

[0054] Setting a height difference between the first reinforcing part 2 and the second reinforcing part 3 along the axial direction of the voice coil bobbin 1 can increase the reinforcing width in the axial direction of the voice coil bobbin 1. For example, when h3 is 50% of h1, that is, the overlapping reinforcing part of the first reinforcing part 2 and the second reinforcing part 3 is half of the first reinforcing part 2, which means the overall reinforcing width in the axial direction of the voice coil bobbin 1 is half of the first reinforcing part 2 and all of the second reinforcing part 3. In this way, the reinforcing widths of the first reinforcing part 2 and the second reinforcing part 3 are combined, and finally the purpose of increasing the reinforcing width in the axial direction of the voice coil bobbin 1 is achieved.

[0055] However, the height difference between the first reinforcing part 2 and the second reinforcing part 3 along the axial direction of the voice coil bobbin 1 should not be too small. When h3 is less than 5% of h1, the purpose of increasing the reinforcing width in the axial direction of the voice coil bobbin 1 cannot be achieved. When h3 is greater than 80% of h1, the reinforcing effects of the first reinforcing part 2 and the second reinforcing part 3 are equivalent to being independently arranged, and they cannot play a role in mutually complementary reinforcing effects.

[0056] Optionally, the material of the reinforcing part is one or a combination of aluminum-magnesium alloy, polyimide film, glass fiber, and glue. Specifically, the materials of the first reinforcing part 2 and the second reinforcing part 3 can be the same.

[0057] The densities, mechanical strengths, and connection strengths of different reinforcing materials are different. Therefore, to ensure that the first reinforcing part 2 and the second reinforcing part 3 achieve the same reinforcing effect on both sides of the voice coil skeleton 1 and enable their reinforcing effects to complement each other and jointly enhance the strength of the voice coil, the materials of the first reinforcing part 2 and the second reinforcing part 3 need to be set as the same material, which can both be aluminum-magnesium alloy materials or both choose polyimide film materials. The present invention does not limit this.

[0058] Of course, the materials of the first reinforcing part and the second reinforcing part can also be different. By selecting the density and size of the reinforcing material, the first reinforcing part 2 and the second reinforcing part 3 can achieve the same reinforcing effect on both sides of the voice coil skeleton 1.

[0059] Optionally, referring to Figure 2 , the first reinforcing part 2 is arranged in a ring shape.

[0060] Since the voice coil skeleton 1 is arranged in a ring shape, to achieve a comprehensive reinforcing effect on the inner side of the voice coil skeleton 1, the first reinforcing part 2 can be arranged in a ring shape and the first reinforcing part 2 can be fully attached to the inner side of the voice coil skeleton 1.

[0061] Of course, the second reinforcing part 3 can also be arranged in a ring shape and the second reinforcing part 3 can be fully attached to the outer side of the voice coil skeleton 1 to achieve a comprehensive reinforcing effect on the outer side of the voice coil skeleton 1.

[0062] Optionally, a plurality of through holes 4 are provided on the side wall of the voice coil skeleton 1, and the plurality of through holes 4 are evenly arranged along the circumferential side of the voice coil skeleton 1.

[0063] Specifically, the plurality of through holes 4 are provided on the voice coil skeleton 1. The setting of the through holes 4 can facilitate the connection between the voice coil and other components. For example, the centering washer can be connected to the voice coil through the through holes 4 to ensure the stable connection and effective vibration of the voice coil.

[0064] The present invention also discloses a sound generating device, which includes a housing and a vibration assembly located in the housing;

[0065] The vibration assembly includes a diaphragm and the voice coil connected to the diaphragm.

[0066] The sound generating device may be a loudspeaker, including but not limited to bass, midrange, treble, and full-range loudspeakers. Particularly in the settings of midrange and treble loudspeakers and full-range loudspeakers, the voice coil provided with reinforcement on both sides can significantly improve the high-frequency acoustic performance of the loudspeaker and enhance the high-frequency ductility of the loudspeaker.

[0067] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A voice coil for a sound generating device, characterized in that, Comprising: A voice coil body, the voice coil body including a voice coil bobbin (1) and a voice coil wire (5) wound around the outer side of the voice coil bobbin (1); A reinforcing part, the reinforcing part including a first reinforcing part (2) and a second reinforcing part (3), the first reinforcing part (2) being disposed inside the voice coil bobbin (1), and the second reinforcing part (3) being disposed outside the voice coil bobbin (1); The reinforcing part is configured to enhance the high-frequency strength of the voice coil.

2. The voice coil for a sound generating device according to claim 1, wherein, The width of the first reinforcing part (2) along the axial direction of the voice coil bobbin (1) is h1, and h1 is 5%-30% of the axial width of the voice coil bobbin (1).

3. The voice coil for a sound generating device according to claim 2, wherein The width of the second reinforcing part (3) along the axial direction of the voice coil bobbin (1) is h2, and h1 is equal to or unequal to h2.

4. The voice coil for a sound generating device according to claim 3, characterized in that, The first reinforcing part (2) and the second reinforcing part (3) are symmetrically disposed on both sides of the voice coil bobbin (1).

5. The voice coil for a sound generating device according to claim 3, characterized in that, The height difference between the first reinforcing part (2) and the second reinforcing part (3) along the axial direction of the voice coil bobbin (1) is h3, and h3 is 5%-80% of h1.

6. The voice coil for a sound generating device according to claim 1, characterized in that, The material of the reinforcing part is one or a combination of more of aluminum-magnesium alloy, polyimide film, glass fiber, and glue.

7. The voice coil for a sound generating device according to claim 6, wherein, The materials of the first reinforcing part (2) and the second reinforcing part (3) are the same.

8. The voice coil for a sound generating device according to claim 1, wherein, The first reinforcing part (2) is arranged in a ring shape.

9. The voice coil for a sound generating device according to claim 1, wherein, A plurality of through holes (4) are provided on the side wall of the voice coil bobbin (1), and the plurality of through holes (4) are uniformly arranged along the circumferential side of the voice coil bobbin (1).

10. A sound generating device, characterized in that, Comprising: A housing and a vibration assembly located inside the housing; The vibration assembly includes a diaphragm and the voice coil according to any one of claims 1-9 connected to the diaphragm.

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