CN103747399B - Multifunctional electroacoustic device - Google Patents

Abstract

The present invention provides a multifunctional electro-acoustic device, which includes a basin frame with a storage space, a rear cover fixed on the basin frame, a vibrator accommodated in the storage space, and a spring plate supporting the vibrator. The vibrator includes a The magnetic bowl on the bottom wall, the rear cover includes an annular fixing part fixed to the basin frame and a side wall extending from the fixing part to the direction of the vibrator for limiting the displacement of the vibrator, the fixing part encloses a hollow part, the The orthographic projection of the bottom wall of the magnetic bowl to the rear cover is located in the hollow portion. The invention can increase the vibration performance and acoustic performance of the electroacoustic device.

Description

Multifunctional electroacoustic device

technical field

The invention relates to an electroacoustic device, in particular to a multifunctional electroacoustic device.

Background technique

With the development of modern electronic product technology, electro-acoustic devices such as speakers are more and more used in various sound-producing products. However, in order to adapt to the development of various electronic products and information communication equipment, the electro-acoustic devices used in such products and equipment need to be more miniaturized, and the cooperation with other components around the electro-acoustic devices is better. compact.

In the electro-acoustic device of the related art, the multi-functional electro-acoustic device includes a basin frame, a rear cover fixed on the basin frame and enclosing a storage space together with the basin frame, a vibrator accommodated in the storage space, and a vibrator for supporting the vibrator. A spring plate, the vibrator includes a magnetic bowl provided with a bottom wall. Wherein, the back cover is a plate-shaped structure, so that the vibration space of the vibrator is limited to the distance between the bottom wall of the magnetic bowl and the back cover, the vibration space of the vibrator is limited, and the vibration performance of the multifunctional electroacoustic device is not good. To increase the vibration space of the vibrator, it is necessary to reduce the volume of the magnetic circuit system, which will affect the acoustic performance of the multifunctional electroacoustic device.

Contents of the invention

The purpose of the present invention is to solve the shortcomings of the above-mentioned electro-acoustic devices, and correspondingly provide a multi-functional electro-acoustic device with excellent vibration performance and acoustic performance.

A multi-functional electro-acoustic device, which includes a basin frame with a storage space, a rear cover fixed on the basin frame, a vibrator accommodated in the storage space, and a spring plate supporting the vibrator, the vibrator includes a magnet without a bottom wall The bowl, the rear cover includes an annular fixing part fixed to the basin frame and a side wall extending from the fixing part to the direction of the vibrator for limiting the displacement of the vibrator, the fixing part surrounds a hollow part, and the bottom of the magnetic bowl The orthographic projection of the wall onto the back cover is located within the hollow portion.

Preferably, the magnetic bowl further includes a side wall vertically extending from the bottom wall of the magnetic bowl and an extension vertically extending from the side wall outward, and the side wall is located below the extension.

Preferably, the side wall is provided with an upper surface close to the extension, and the distance between the upper surface and the extension is less than or equal to the maximum deformation of the spring plate.

Preferably, the spring plate is sheathed on the outer circumference of the magnetic bowl and abuts against the extension part.

Preferably, the side wall is located at the end of the fixing part.

Preferably, the side wall is a ring structure and surrounds the side wall of the magnetic bowl.

Preferably, the side wall is fixedly connected to the side wall of the magnetic bowl.

Preferably, glue is used to bond the side wall and the side wall of the magnetic bowl.

The back cover of the multifunctional electroacoustic device of the present invention adopts a ring-shaped hollow structure, so that the vibration space of the vibrator can be increased; in addition, the side wall of the back cover can limit the displacement of the vibrator, thereby improving the performance of the multifunctional electroacoustic device. vibration performance and acoustic performance.

Description of drawings

Fig. 1 is a three-dimensional assembly diagram of a multifunctional electroacoustic device of the present invention;

Fig. 2 is a sectional view along the A-A direction shown in Fig. 1;

Fig. 3 is a three-dimensional exploded view of the multifunctional electroacoustic device of the present invention;

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Please refer to Fig. 1, Fig. 2 and Fig. 3 at the same time, the multifunctional electroacoustic device 100 includes a basin frame 1 with accommodating space, a vibration system 2 fixed on the basin frame 1, a vibrator 3 accommodated in the basin frame 1, a support The spring plate 4 of the vibrator 3 and the rear cover 5 fixed on the basin frame 1 .

The vibration system 2 includes a diaphragm 21 and a voice coil 22 for driving the diaphragm 21 to vibrate. The voice coil 22 is provided with a voice coil lead wire 221 . The vibrating membrane 21 can be an integral structure or a separate structure. In other optional embodiments, it can also be a vibrating plate, etc., as long as the sound can be realized, it can be implemented.

In this embodiment, the vibrator 3 is a magnetic circuit system, which includes a magnetic bowl 31, a magnetic steel 32 accommodated in the magnetic bowl 31, and a pole core 33 attached to the surface of the magnetic steel. The magnetic circuit system 3 is accommodated in Inside the pot frame 1. The magnetic steel 32 and the pole core 33 are accommodated in the magnetic bowl 31 , a magnetic gap is formed between the magnetic steel 32 and the magnetic bowl 31 , and the voice coil 22 is inserted into the magnetic gap. It should be noted that the magnetic circuit system can be a single magnetic circuit system or a multi-magnetic circuit system with multiple magnetic steels. Correspondingly, a magnetic gap can be formed between multiple magnetic steels. Object of the present invention can be achieved.

The magnetic bowl 31 can be a bowl-shaped structure, or other shapes with accommodating space. In this embodiment, it is a bowl-shaped structure, which includes a bottom wall 313, a side wall 311 extending vertically from the bottom wall 313, and The extension portion 312 vertically extends outward from the side wall 311 .

The spring plate 4 is a hollow structure, which is sleeved on the outside of the magnetic bowl 31 and abuts against the lower surface of the extension part 312. The spring plate is connected to the frame 1 to support the magnetic circuit. The role of System 3. In this way, the size of the central magnetic circuit can be maximized, thereby improving the acoustic performance and vibration performance of the multifunctional electroacoustic device. In other optional implementation manners, the vibrator 3 may also include a counterweight for enhancing the vibration of the vibrator.

The rear cover 5 is a hollow structure, including an annular fixing portion 51 and a side wall 52 extending from the fixing portion 51 toward the vibrator 3 to limit the displacement of the vibrator. In this embodiment, the side wall 52 is formed by extending from the end of the fixing portion 51 close to the hollow portion 53 toward the vibrator 3 . The fixing part 51 encloses a hollow part 53, the orthographic projection of the magnetic bowl bottom wall 131 toward the rear cover 5 is located in the hollow part 53, and the side wall 52 is a ring structure and surrounds the magnetic bowl 31 In this way, the magnetic circuit system 3 can give way to the vibration space, and the vibration performance of the multifunctional electroacoustic device can be increased without affecting the performance of the magnetic circuit system.

The side wall 52 is located directly below the extension portion 312, and the side wall 52 is provided with an upper surface 521 close to the side wall, and the distance between the upper surface 521 and the extension portion 312 is equal to or smaller than the spring plate 4 The maximum amount of elastic deformation. In this way, the displacement of the magnetic circuit system 3 in the vertical direction can be limited, the spring plate 4 can be guaranteed to be within the elastic deformation, plastic deformation can be prevented, and the reliability of the mechanical experiment can be improved. In other optional embodiments, the side wall 52 may not extend from the end of the fixed part 51, or may be formed by extending from other positions of the fixed part 51, as long as it is ensured to be located directly below the extension part 312 to play a limiting role. The displacement of the magnetic circuit system 3 in the vertical direction is practicable.

The multi-functional electro-acoustic device can also realize simple conversion with a single speaker, that is, the side wall 311 of the magnetic bowl 31 is fixedly connected with the side wall of the rear cover 5, that is, the conversion of the speaker can be realized. Then, of course, other fixing methods can also be used. When the magnetic bowl 31 and the side wall 52 are not bonded and fixed, at this time, when the AC signal is passed to the multifunctional electroacoustic device, the voice coil 21 that is powered will generate an alternating magnetic field, and the driving vibrator 3 will be in the magnetic field. Vibration, to realize the vibration function, if the frequency of the audio signal is higher than the resonance frequency, the vibrator 3 will remain still, and the voice coil 21 will vibrate under the action of the magnetic field to realize the sounding function. That is, when the magnetic bowl 31 and the side wall 52 are not fixed, the multifunctional electroacoustic device can realize both the sounding function and the vibration function; when the magnetic bowl 31 and the side wall 52 are bonded and fixed, the magnetic circuit system In a fixed state, at this time, the electroacoustic device only realizes the function of sound generation, which is equivalent to a single speaker.

The back cover of the multifunctional electroacoustic device of the present invention adopts a ring-shaped hollow structure, so that the vibration space of the vibrator can be increased, and the vibration performance and acoustic performance of the multifunctional electroacoustic device can be improved.

The above descriptions are only examples of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the content of the present invention description, directly or indirectly used in other related technical fields, shall be the same as The theory is included in the patent protection scope of the present invention.

Claims (5)

1. a kind of multifunctional electroacoustic device, it includes the frame with receiving space, the bonnet being fixed in frame, is contained in Hold the latch plate that the oscillator in space and the support oscillator vertically vibrate, the oscillator includes magnetic bowl and is fixed on magnetic The magnet steel of bowl, it is characterised in that：The bonnet includes the ring-type fixed part fixed with frame and self-fixed department to oscillator direction The side wall for being used to limit oscillator in the vertical direction displacement of extension, the magnetic bowl include bottom wall and extended vertically from magnetic bottom of bowl wall Side wall and be fixed on from side wall to outside vertically extending extension, the latch plate on the extension, the side wall position In the underface of the extension, the side wall is provided with the upper surface of close extension, between the upper surface and extension Distance be less than or equal to the largest deformation amount of latch plate, the fixed part surrounds a hollow bulb, and the bottom wall of the magnetic bowl holds It is placed in the hollow bulb of the bonnet.

2. multifunctional electroacoustic device according to claim 1, it is characterised in that：The latch plate is set in the magnetic bowl Periphery, and it is connected to the extension.

3. multifunctional electroacoustic device according to claim 2, it is characterised in that：The side wall is leaning on from the fixed part The end of nearly hollow bulb extends to be formed to oscillator direction.

4. multifunctional electroacoustic device according to claim 3, it is characterised in that：The side wall is cyclic structure and surround The magnetic bowl side wall.

5. multifunctional electroacoustic device according to claim 4, it is characterised in that：Between the side wall and the magnetic bowl side wall It is bonded using glue.