Patent Application
20240064469
The present disclosure relates to electroacoustic transducers, in particular to a voice coil and a sounding device using the voice coil.
A sounding device in the related art includes a magnetic circuit system and a vibration system. The vibration system includes a diaphragm and a voice coil driving the diaphragm for vibrating and emitting sounds, where, the voice coil is formed by winding a single wire coil by coil.
If F denotes the driving force of the voice coil, then F=B*L*I, where, B denotes the electromagnetic induction intensity of the magnetic circuit system, L denotes the total wire length of the voice coil, I denotes the value of the current flowing through the voice coil. In the case that B and L are certain, to get a bigger F requires a bigger I. If the voltage across the voice coil is certain, it needs to reduce the wire resistance of the voice coil to get a bigger I, thus a thicker wire is needed to wind the voice coil, resulting in the increased weight of the voice coil, thereby the mid-frequency performance of the sounding device is not good due to the increased weight of the vibration system.
Thus, it is necessary to provide a novel voice coil and a sounding device using the voice coil to solve the problem.
An objective of the present disclosure is to overcome the above technical problems and provide a voice coil and a sounding device using the voice coil that can select a wire with a lighter weight and a greater resistance, thereby the weight of the vibration system decreases and the mid-frequency performance of the sounding device gets better.
In order to achieve the objective mentioned above, the present disclosure discloses a voice coil, applied to a sounding device, including a coil body. The coil body includes at least two sub coils fixed together in sequence. Each sub coil is provided with an incoming wire end and an outgoing wire end. Each sub coil forms only one current path from the incoming wire end to the outgoing wire end and flowing in the same direction. The incoming wire ends of the at least two sub coils are welded together to form an incoming area on the coil body. The outgoing wire ends of the at least two sub coils are welded together to form an outgoing area on the coil body.
As an improvement, the at least two sub coils are stacked up and down in sequence to form the coil body.
As an improvement, the at least two sub coils are sleeved one another in sequence to form the coil body.
As an improvement, each sub coil is wound separately, at least one sub coil has a different wire material than another sub coil.
As an improvement, the voice coil further includes an incoming lead connected to the incoming area and an outgoing lead connected to the outgoing area.
Further, the present disclosure also discloses a sounding device using any of the aforesaid voice coils.
As an improvement, the sounding device further includes a flexible printed circuit board. The flexible printed circuit board includes a fixed end and a free end extending from the fixed end and connected to the voice coil. The free end is provided with two pads, one pad is connected to the incoming area, and the other pad is connected to the outgoing area.
As an improvement, the sounding device further includes a conductive connector. The conductive connector is provided with two pads, the incoming lead is connected to one pad, and the outgoing lead is connected to the other pad.
In the voice coil and the sounding device using the voice coil according to the present disclosure, the coil body of the voice coil includes at least two sub coils fixed together in sequence. Each sub coil is provided with an incoming wire end and an outgoing wire end. Each sub coil forms only one current path from the incoming wire end to the outgoing wire end and flowing in the same direction. The incoming wire ends of the at least two sub coils are welded together to form an incoming area on the coil body. The outgoing wire ends of the at least two sub coils are welded together to form an outgoing area on the coil body. Compared with the related art, in the case that B, L, and the voltage across the voice coil are certain, the voltage across each sub coil conducted by the incoming area and the outgoing area is same as before, and because the divided wire length of each sub coil becomes smaller, the resistance of each sub coil becomes smaller, if obtain the same driving force as before, the resistance of each sub coil can be larger, as a result, a wire with a lighter weight and a greater resistance can be selected, thereby the weight of the vibration system decreases and the mid-frequency performance of the sounding device gets better.
In order to more clearly illustrate the technical solutions in embodiments of the present disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. It is apparent that, the accompanying drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those of ordinary skill in the art based on the accompanying drawings without creative efforts, wherein:
The technical solutions in embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure. It is apparent that, the described embodiments are merely some of rather than all of the embodiments of the present disclosure. All other embodiments acquired by those of ordinary skill in the art without creative efforts based on the embodiments of the present disclosure shall fall within the protection scope of the present disclosure.
Referring to
In other embodiments, as a choice, referring to
In addition, as a choice, each sub coil 111/111′ is wound separately, at least one sub coil 111/111′ has a different wire material than another sub coil 111/111′. In this way, the coil body 11/11′ may be formed in different shapes, such as abnormal shapes including steps, grooves and the like, thus the coil body 11/11′ can be adapted to different application environments.
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In the voice coil and the sounding device using the voice coil according to the present disclosure, the coil body of the voice coil includes at least two sub coils fixed together in sequence. Each sub coil is provided with an incoming wire end and an outgoing wire end. Each sub coil forms only one current path from the incoming wire end to the outgoing wire end and flowing in the same direction. The incoming wire ends of the at least two sub coils are welded together to form an incoming area on the coil body. The outgoing wire ends of the at least two sub coils are welded together to form an outgoing area on the coil body. Compared with the related art, in the case that B, L, and the voltage across the voice coil are certain, the voltage across each sub coil conducted by the incoming area and the outgoing area is same as before, and because the divided wire length of each sub coil becomes smaller, the resistance of each sub coil becomes smaller, if obtain the same driving force as before, the resistance of each sub coil can be larger, as a result, a wire with a lighter weight and a greater resistance can be selected, thereby the weight of the vibration system decreases and the mid-frequency performance of the sounding device gets better.
The above are only embodiments of the present disclosure. It should be pointed out that those of ordinary skill in the art may also make improvements without departing from the ideas of the present disclosure, all of which fall within the protection scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202222212720.7 | Aug 2022 | CN | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2022/125143 | Oct 2022 | US |
| Child | 18089577 | US |
