MULTIFUNCTIONAL SOUNDING DEVICE

The multifunctional sounding device provided by the present disclosure includes a housing body, a sounding unit and a vibration assembly. The sounding unit includes a frame, a vibration system fixed on the frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound in a first direction. The vibrator surrounds the outside of the magnetic circuit system with space. The coil assembly interacts with the magnetic circuit system to drive the vibrator to vibrate in a second direction perpendicular to the first direction. The coil assembly includes an iron core fixed to the vibrator and a coil wrapped around the iron core. The multifunctional sounding device of the present disclosure has a small thickness and low production cost.

TECHNICAL FIELD

The present disclosure relates to the field of electroacoustic transducers, especially to a multifunctional sounding device.

BACKGROUND ART

With the rapid development of the consumer electronics industry, especially smart phones, terminal consumers have higher and higher demands on device experience, and the demand for auditory and tactile experience is gradually increasing. The multifunctional sounding device with vibration function and playing sound is widely used in portable mobile terminal devices.

In the related art, the multifunctional sounding device includes a housing body and a sounding unit accommodated in the housing body and a motor assembly. The sounding unit includes a frame and a vibration system and a magnetic circuit system respectively fixed to the frame. However, the motor assembly is stacked under the sounding unit, which increases the thickness of the multifunctional sounding device, making it difficult to reduce the thickness of the multifunctional sounding device. In addition, the sounding unit and the motor assembly have their own magnets, so that the magnets in the multifunctional sounding device are large in number, high in cost, large in size and unable to be miniaturized. Moreover, the driving forces of the magnetic field interfere and influence each other, so that the acoustic performance and vibration performance of the multifunctional sounding device are poor.

Therefore, it is really necessary to provide a new the multifunctional sounding device to solve the above technical problems.

SUMMARY OF THE INVENTION

The present disclosure is to provide the multifunctional sounding device with the magnetic circuit compact, smaller in size and stronger in vibration function.

In order to achieve the objective mentioned above, the present disclosure provides a multifunctional sounding device including: a housing body with a containment space; a sounding unit accommodated in the containment space, including a frame, a vibration system fixed on the frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound in a first direction; a vibration assembly received in the accommodation space, including a vibrator suspended in the containment space, a coil assembly mounted on the vibrator and opposite to the magnetic circuit system, and an elastic member supporting the vibrator. The vibrator surrounds and spaces from an outside of the magnetic circuit system. The coil assembly interacts with the magnetic circuit system for driving the vibrator to vibrate in a second direction perpendicular to the first direction; and the coil assembly includes an iron core fixed to the vibrator and a coil wrapped around the iron core.

In addition, the magnetic circuit system includes a first magnet fixed to the housing body and a second magnet arranged spaced from the first magnet for forming a magnetic gap; the coil interacts with the second magnet.

In addition, a wire winding direction of the coil is parallel to the second direction.

In addition, the second magnet includes a first magnetization area, a second magnetization area and a third magnetization area arranged in sequence along the second direction; the magnetization direction of the first magnetization area and the third magnetization area are the same; the magnetization direction of the first magnetization area and the second magnetization area are opposite.

In addition, the vibrator includes a main body having a first main body along a long axis direction and a second main body along a short axis; the iron core is fixed to the first main body.

In addition, the elastic member includes a bottom board supporting the main body, a side board bent and extended from the edge of the bottom board, and an elastic part extending from one end of the side board; the bottom board and the housing body are spaced apart; the elastic part includes a first connection part connected to the side board, a middle elastic part extending from the first connection part along the short axis direction of said main body, and a second fixed part extending from the end of the middle elastic part away from the first connection part to be fixed on the housing body; the middle elastic part and the second main body are spaced apart.

In addition, the vibrator further includes a third main body bent and extended from the edge of the first main body; the third main body is fixed on the surface of the side board away from the housing body.

In addition, the first main body is provided with a notch penetrating therethrough along the first direction; the iron core is accommodated in the notch and fixed on the first main body.

In addition, the magnetic circuit system further includes a first pole core fixed on the side the first magnet near the vibration system and a third magnet fixed on the side of the first pole core facing the vibration system; the first magnet and the third magnet are magnetized along the first direction; the magnetization direction of the first magnet is opposite to that of the third magnet.

In addition, the magnetic circuit system further includes a soft magnet fixed on the side of the second magnet facing the first magnet; two ends of the soft magnets along the second direction are provided with a first magnet respectively.

Compared with related technologies, the multifunctional sounding device provided by the present disclosure includes a housing body with a containment space, a sounding unit accommodated in the containment space and a vibration assembly. The sounding unit includes a frame, a vibration system fixed on the frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound in a first direction. The vibration assembly includes a vibrator suspended in the containment space, a coil assembly assembled on the vibrator and opposite to the magnetic circuit system, and an elastic member supporting the vibrator. The vibrator surrounds the outside of the magnetic circuit system with space. The coil assembly interacts with the magnetic circuit system to drive the vibrator to vibrate in a second direction perpendicular to the first direction. The coil assembly includes an iron core fixed to the vibrator and a coil wrapped around the iron core. The vibrator fixed with the coil assembly surrounds the peripheral side of the magnetic circuit system. In this way, the multifunctional sounding device is reduced, which is beneficial to the development of miniaturization. The solenoid structure composed of the coil and the iron core is set opposite to the magnetic circuit system to provide the vibration assembly for vibration, used to share the magnetic circuit system with the vibration system of the sound, which reduces the number of the magnet and reduces the production cost.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

As shown inFIGS.1-6, the present disclosure provides a multifunctional sounding device100, which includes a housing body1with a containment space10and a sounding unit2contained in the containment space10and a vibration assembly3.

The sounding unit2includes a frame21, a vibration system22fixed to the frame21, and a magnetic circuit system23that drives the vibration system22to vibrate in a first direction and produce sound. The vibration system22includes a diaphragm221fixed to the frame21, a voice coil222fixed to the diaphragm221, a skeleton223supporting the voice coil222and a flexible circuit board224electrically connected to the voice coil222. The voice coil222drives the diaphragm221to vibrate along the first direction X to produce sound. The magnetic circuit system23includes a first magnet231fixed on the housing body1, a second magnet233spaced on the peripheral side of the first magnet231to form the magnetic gap232, a first pole core234fixed on the first magnet231near the diaphragm221side, a third magnet235fixed on the side of the first pole core234facing the diaphragm221, and a second pole core236fixed on the side of the second magnet233facing the diaphragm221. It can be understood that the voice coil222is in the shape of a racetrack. The second magnet233is arranged on the long axis side of the voice coil222, that is, the second magnet233extends along the long axis direction of the voice coil222.

Further, the middle position of the diaphragm221is fixed on the surface of the third magnet235away from the first pole core234. The second pole core236is fixed on the frame21. The frame21includes a first bracket211fixedly connected with the second pole core236and a second bracket212fixed above the first bracket211. The outer edge of the diaphragm221is sandwiched between the first bracket211and the second bracket212. The voice coil222is inserted into the magnetic gap232through the skeleton223.

The vibration assembly3includes a vibrator31suspended in the containment space10, A coil assembly32assembled on the vibrator31and opposite to the magnetic circuit in system23, and an elastic member33supporting the vibrator31. The vibrator31surrounds the outside of the magnetic circuit system23with space. The coil assembly32interacts with the magnetic circuit system23to drive the vibrator31to vibrate along a second direction Y perpendicular to the first direction X. The coil assembly32includes an iron core321fixed to the vibrator31and a coil322wrapped around the iron core321.

The second magnet233includes a first magnetization area2331, a second magnetization area2332and a third magnetization area2333arranged in sequence along the second direction Y. The magnetization direction of the first magnetization area2331and the third magnetization area2333are the same. The magnetization directions of the first magnetization area2331and the second magnetization area2332are opposite. The first magnet231and the third magnet235are magnetized along the first direction X. The magnetization direction of the first magnet231and the third magnet235is opposite.

Specifically, the vibrator31surrounds outside the second magnet233. The coil322and the second magnet233are relatively spaced apart and interact with each other. The wire winding direction of the coil322is parallel to the second direction Y.

The vibrator31includes a main body311which is rectangular, the main body311includes a first main body3111along the long axis direction, a second main body along the short axis3112, and a third main body3113bent and extended from the edge of the first main body. The iron core321is fixed to the first main body3111. Further, the elastic member33includes a bottom board331supporting the main body311, a side board332bent and extended from the edge of the bottom board331, and an elastic part333extending from one end of the side board. The bottom board331is spaced apart from the housing body1. The elastic part333includes a first connection part3331connected to the side board332, a middle elastic part3332extending from the first connection part3331along the short axis direction of the main body311, and a second fixed part3333extending from the end of the middle elastic part3332away from the first connection part3331to be fixed on the housing body1The middle elastic part3332is spaced apart from the second main body3112. The third main body3113is fixed on the surface of the side board332away from the housing body1.

Further, the first main body3111is provided with a notch3114penetrating therethrough along the first direction X. The iron core321is accommodated in the notch3114and fixed to the first main body3111.

Since the second magnet233is a three section magnetized structure, in order to avoid the first magnetization area2331and the third magnetization area2333from canceling out the driving force of the sounding unit2, as shown inFIG.7, the magnetic circuit system23in another embodiment of the present disclosure further includes a soft magnet237fixed on the side of the second magnet233facing the first magnet231. It can be understood that, the soft magnet237is provided at both ends of the first magnet231along the second direction Y, so as to reduce the driving force loss of the sounding unit2.

In order to further enhance the magnetic field performance of the magnetic circuit system23, the magnetic circuit system23also includes a fourth magnet238is arranged to the peripheral side of the first magnet231with space, and the fourth magnet238is located on the short axis side of the voice coil222. It can be understood that, as shown inFIG.4, the fourth magnet238is disposed at both ends of the first magnet231along the long axis direction (ie, both ends along the second direction Y). In order to prevent the vibrator31from colliding with the fourth magnet238when vibrating along the second direction Y, the fourth magnet238is fixed on the surface of the second pole core236away from the diaphragm221. Besides, along the first direction X, the thickness of the fourth magnet238is smaller than the thickness of the second magnet233. That is, the fourth magnet238is suspended in the containment space10and is not fixed to the housing body1.

Compared with related technologies, the multifunctional sounding device provided by the present disclosure includes a housing body with a containment space, a sounding unit accommodated in the containment space and a vibration assembly. The sounding unit includes a frame, a vibration system fixed on the frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound in a first direction. The vibration assembly includes a vibrator suspended in the containment space, a coil assembly assembled on the vibrator and opposite to the magnetic circuit system, and an elastic member supporting the vibrator. The vibrator surrounds the outside of the magnetic circuit system with space. The coil assembly interacts with the magnetic circuit system to drive the vibrator to vibrate in a second direction perpendicular to the first direction. The coil assembly includes an iron core fixed to the vibrator and a coil wrapped around the iron core. The vibrator fixed with the coil assembly surrounds the peripheral side of the magnetic circuit system. In this way, the multifunctional sounding device is reduced, which is beneficial to the development of miniaturization. The solenoid structure composed of the coil and the iron core is set opposite to the magnetic circuit system to provide the vibration assembly for vibration, used to share the magnetic circuit system with the vibration system of the sound, which reduces the number of the magnet and reduces the production cost.