The present disclosure relates to acoustoelectric technology, and in particular, to a sound device applied to a portable electronic product.
With an advent of a mobile Internet era, the number of smart mobile devices is increasingly rising. Among a large quantity of mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. A large number of sound devices for playing sounds are widely applied to the present smart mobile devices such as mobile phones.
A sound device in a related technology includes a basket, a vibration system fixed to the basket, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, where the vibration system includes a diaphragm fixed to the basket. The diaphragm includes a vibration portion, and the vibration portion includes a dome portion.
However, in the related technology, the dome portion is made of aluminum foam and aluminum-sandwiched materials. As a result, structural strength of the dome portion is limited which causes cutting apart vibration or anti-phase vibration to be generated at high frequencies, resulting in a sudden drop in a SPL (Sound Pressure Level), thereby affecting acoustic performance of the sound device in high frequency.
Therefore, it is necessary to provide a new sound device to resolve the foregoing problem.
To describe technical solutions in embodiments of the present disclosure more clearly, the following briefly introduces accompanying drawings for describing the embodiments. Apparently, the accompanying drawings in the following description show merely some embodiments of the present disclosure, and a person of ordinary skills in the art may still derive other drawings from these accompanying drawings without creative efforts.
The following clearly and completely describes technical solutions in embodiments of the present disclosure with reference to accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some embodiments rather than all the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skills in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.
Referring to
The basket 1 is configured to fix the vibration system 2 and the magnetic circuit system 4.
The vibration system 2 is fixed to the basket 1. The vibration system 2 includes a diaphragm 21 fixed to the basket 1. The magnetic circuit system 4 includes a magnetic bowl 41 fixed to the basket 1, a magnetic steel 42 fixed in the magnetic bowl 41, and a pole core 43 attached to one side of the magnetic steel 42 close to the diaphragm 21. The diaphragm 21 and the magnetic steel 42 are disposed parallel to each other.
The diaphragm 21 includes a vibration portion 211 and a folded ring portion 212 extending from an edge of the vibration portion 211. The folded ring portion 212 is fixed to the basket 1.
The vibration portion 211 includes a vibration body portion 2111. The following describes examples of the sound device 100 of which the vibration body portion 2111 has two different structures.
Referring to
Referring to
In this embodiment, the reinforcing rib 3 is fixed to the vibration portion 211 in a plurality of manners. An objective thereof is to improve stiffness of the vibration portion 211, make a SPL index in high frequency better, and improve high frequency performance of the sound device 100. There are the following four examples in which the reinforcing rib 3 is fixed to the vibration portion 211.
In Example 1, referring to
In Example 2, at least one reinforcing rib 3 passes through a center of the vibration portion 211. The structure improves stiffness of the center of the vibration portion 211, to improve an inherent frequency of the vibration portion 211, so that a drop in the SPL occurs to a higher frequency region which human ears not sensitive to. More preferably, referring to
In Example 3, referring to
In Example 4, referring to
This embodiment is not limited thereto. The foregoing structures may be randomly combined and matched, to enhance stiffness of the dome 2112 and provide better high frequency performance.
The reinforcing rib 3 is fixed to the vibration portion 211. When the vibration portion 211 is in a state of maximum amplitude, the reinforcing rib 3 and the magnetic circuit system 4 are disposed separately from each other, that is, the reinforcing rib 3 and the magnetic steel 42 are disposed separately from each other. That is, when the magnetic circuit system 4 drives the diaphragm 21 to vibrate, the reinforcing rib 3 fixed to the vibration portion 211 also vibrates, and a thickness of the reinforcing rib 3 is needed to be considered to allow the reinforcing rib 3 not to get in contact with the magnetic circuit system 4 during vibration.
The magnetic circuit system 4 is fixed to the basket 1, and the magnetic circuit system 4 is configured to drive the vibration system 2 to vibrate. The magnetic circuit system 4 includes the magnetic bowl 41, the magnetic steel 42, and the pole core 43. The magnetic circuit system 4 is provided with a groove 431 for avoiding the reinforcing rib 3.
The magnetic bowl 41 is fixed to the basket 1.
The magnet 42 is fixedly in the magnetic bowl 41.
The pole core 43 is attached to one side of the magnetic steel 42 close to the diaphragm 21. The groove 431 is formed by a recess of the pole core 43. The reinforcing rib 3 is fixed to one side of the vibration portion 211 close to the magnetic circuit system 4, and an orthogonal projection of the reinforcing rib 3 on the pole core 43 may fully fall within the groove 431. The structure of the sound device 10 is not needed to increase a volume thereof and effectively increases the thickness of the reinforcing rib 3, thereby improving high frequency performance of the vibration portion 211. This embodiment is not limited thereto. In another structure, there are two pole cores 43 which are disposed parallel to the short shafts or the long shafts of the basket 1 to form an accommodating gap. The reinforcing rib 3 is accommodated in the accommodating gap. When the vibration portion 211 is in a state of maximum amplitude, the reinforcing rib 3 is disposed separately from the magnet 42 and the pole core 43 respectively. The structure is more easily processed, and can also improve high frequency performance of the sound device 100.
Compared with the related technology, with respect to the sound device of the present disclosure, the reinforcing rib is fixed to one side of the vibration portion close to the magnetic circuit system and/or one side of the vibration portion away from the magnetic circuit system. The structure can effectively improve stiffness of the vibration portion, thereby effectively improving acoustic performance of the sound device in high frequency.
The foregoing descriptions are merely embodiments of the present disclosure. It should be noted herein that a person of ordinary skills in the art may made improvements without departing the creation idea of the present disclosure. However, these improvements fall within the protection scope of the present disclosure.
Number | Date | Country | Kind |
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201821235845.9 | Aug 2018 | CN | national |