CN206908845U - A kind of mobile phone Microspeaker - Google Patents

Abstract

The utility model discloses a micro-speaker for a mobile phone, which comprises an iron frame, a circular groove is arranged at the bottom of the iron frame, a central magnetic core is fixedly bonded to the bottom of the inner cavity of the circular groove, and the central magnetic core An iron sheet is arranged on the top, and an auxiliary magnetic core is arranged on the iron sheet, and a voice coil frame is arranged on the top of the auxiliary magnetic core, and the voice coil frame is fixedly connected with the iron frame, and the inner side of the voice coil frame is set There is a voice coil, the top of the voice coil is fixedly connected to the sound membrane, the center of the sound membrane is provided with a ball top and a ring, and the ring is set on the edge of the ball top, and a dust cover is provided above the ball top , there are a number of pores evenly distributed on the dust cover, and the dust cover is buckled on the top of the iron frame, and an anti-pressure gasket is also provided between the dust cover and the top of the iron frame, the The micro-speaker for mobile phones has simple structure, light and small size, high sensitivity, low sound distortion and good sound quality, so the micro-speaker for mobile phones has wide application prospects.

Description

Micro speaker for mobile phone

technical field

The utility model relates to the technical field of electroacoustic products, in particular to a micro speaker for a mobile phone.

Background technique

With the continuous development of electronic technology, portable electronic devices are also constantly developing towards thinner and smaller. At the same time, people have higher and higher performance requirements for portable electronic devices. The requirements are getting higher and higher. Micro speakers are important acoustic components of portable digital products such as mobile phones and MP3s. They are used to convert sound wave electrical signals into sound signals. Micro speakers usually include vibration systems and magnetic circuit systems. The diaphragm and the voice coil together, however, the micro speaker is a larger component in the smart phone, as the function of the smart phone becomes more powerful and thinner, the internal layout space becomes more and more tight. The size and performance of loudspeakers put forward higher requirements.

However, the existing micro-speakers for mobile phones are complex in structure and limited in size, and the magnetic field of the magnetic core is affected, which leads to asymmetric distribution of the electromechanical coupling system of the product and high total harmonic distortion of the product. In the case of shrinking, the effective vibration radiation area is also continuously decreasing, resulting in a decrease in sensitivity. The strength of the diaphragm dome of some micro-speakers is poor. This is far from being able to satisfy current people's requirements for the product.

Therefore, how to design a micro-speaker for mobile phones has become a problem that we need to solve at present.

Utility model content

The purpose of this utility model is to provide a micro-speaker for a mobile phone to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: a micro-speaker for mobile phones, including an iron frame, the bottom of the iron frame is provided with a circular groove, and the bottom of the inner cavity of the circular groove is fixedly bonded with a center A magnetic core, the top of the central magnetic core is provided with an iron sheet, the iron sheet is provided with a secondary magnetic core, the top of the secondary magnetic core is provided with a voice coil frame, and the voice coil frame is fixedly connected to the iron frame , the inner side of the voice coil frame is provided with a voice coil, the top of the voice coil is fixedly connected to the sound membrane, the center of the sound membrane is provided with a ball top and a ring, and the ring is arranged on the edge of the ball top, the A dust cover is provided above the ball top, and a number of fine holes are evenly distributed on the dust cover, and the dust cover is buckled on the top of the iron frame, and a gap between the dust cover and the top of the iron frame An anti-pressure washer is also provided, a terminal is provided at the bottom of the iron frame, and a lead plug is provided on one side of the terminal, and the lead plug is connected with the terminal wire.

Further, the iron frame has a square shape and is made of stainless steel.

Further, a magnetic pipe is welded in the center of the iron sheet, and the secondary magnetic core is sleeved on the outer wall of the magnetic pipe.

Further, the ring includes an inner ring and an outer ring connected to each other, and the protruding directions of the inner ring and the outer ring are opposite.

Further, the bottom end of the voice coil is located between the inner wall of the circular groove and the central magnetic core.

Further, the edge of the sound diaphragm is fixedly arranged between the top end of the iron frame and the anti-pressure gasket, and the anti-pressure gasket is made of rubber.

Further, the inner cavity of the dome is filled with a reinforcing sheet, and the reinforcing sheet is a mica sheet.

Compared with the prior art, the utility model has the beneficial effects that: the micro-speaker for mobile phone has simple structure, light and small size through various improvements to the device body, and the central magnetic core is made The magnetic field distribution is uniform and symmetrical, reducing the degree of distortion. By setting the interconnected inner ring and the outer ring, the effective vibration radiation area of the sound film is increased, and the sensitivity is improved. By filling the inner cavity of the dome with mica sheets, The strength of the dome is increased, so that the sound quality can be maintained even under high-frequency conditions, so this kind of micro-speaker for mobile phones has a broad application market.

Description of drawings

Fig. 1 is a vertical sectional structural representation of the utility model;

Fig. 2 is the top view structural representation of the utility model;

Fig. 3 is a structural schematic diagram of the folding ring of the present utility model;

In the figure: 1-iron frame; 2-circular groove; 3-center core; 4-iron piece; 5-secondary core; 6-voice coil former; 7-voice coil; 8-sound film; Dome; 10-ring; 11-dust cover; 12-fine hole; 13-pressure washer; 14-terminal; 15-lead plug; 16-magnetic tube; 17-inner ring; 18-outer ring; 19-reinforcing piece.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1-Fig. 3, the utility model provides a kind of technical proposal: a kind of miniature loudspeaker for mobile phone, comprises iron frame 1, and the bottom of described iron frame 1 is provided with circular groove 2, and described circular groove 2 The bottom of the inner cavity is fixedly bonded with a central magnetic core 3, and the top of the central magnetic core 3 is provided with an iron sheet 4, and an auxiliary magnetic core 5 is arranged on the top of the iron sheet 4, and a voice coil frame is arranged on the top of the auxiliary magnetic core 5 6, and the voice coil frame 6 is fixedly connected with the iron frame 1, a voice coil 7 is arranged inside the voice coil frame 6, the top of the voice coil 7 is fixedly connected with a sound film 8, and the center of the sound film 8 is set There is a dome 9 and a ring 10, and the dome 10 is arranged on the edge of the dome 9, a dust cover 11 is arranged above the dome 9, and a number of pores are evenly distributed on the dust cover 11 12, and the dust cover 11 is buckled on the top of the iron frame 1, and an anti-pressure gasket 13 is also provided between the dust cover 11 and the top end of the iron frame 1, and the bottom end of the iron frame 1 is provided There is a terminal 14, and a lead plug 15 is provided on one side of the terminal 14, and the lead plug 15 is connected with the terminal 14 by wires. The above constitutes the basic structure of the present utility model.

More specifically, the iron frame 1 has a square shape and is made of stainless steel. Through such a design, the iron frame is light and small in size, easy to install inside the mobile phone, and has the characteristics of extrusion resistance and wear resistance. The center of the iron sheet 4 is welded with a magnetic tube 16, and the secondary magnetic core 5 is sleeved on the outer wall of the magnetic tube 16. By arranging the magnetic tube 16, the magnetic field distribution of the central magnetic core 3 can be evenly distributed. Symmetrical to reduce the degree of distortion, the ring 10 includes an interconnected inner ring 17 and an outer ring 18, and the protrusion direction of the inner ring 17 and the outer ring 18 are opposite, by setting the interconnected The inner ring 17 and the outer ring 18 increase the effective vibration radiation area of the sound membrane 8 and improve the sensitivity. The bottom end of the voice coil 7 is located between the inner wall of the circular groove 2 and the between the central magnetic core 3, so that the voice coil 7 can be stabilized in the circular groove 2, ensuring the quality and stability of the sound, the edge of the sound membrane 8 is fixed on the iron frame 1 Between the top end and the anti-pressure gasket 13, and the anti-pressure gasket 13 is made of rubber material, by setting the gasket 13, the dust cover 11 is prevented from destroying the sound membrane 8, and the dust cover 11 , can protect the dome 9, and can also be dust-proof, the inner cavity of the dome 9 is filled with a reinforcement sheet 19, and the reinforcement sheet 19 is a mica sheet, by filling the dome 9 with a mica sheet, increasing The strength of the dome 9 is improved, so that the sound quality can be maintained even under high-frequency conditions.

Working principle: This kind of micro-speaker for mobile phone is firstly energized through the lead plug 15, and the electrical signal is transmitted to the voice coil 7 by the terminal 14, and the electrical signal is converted into the magnetic field of the voice coil 7 through the magnetic field of the central magnetic core 3 and the secondary magnetic core 5. Vibration, and then drive the sound film 8 to vibrate, through the dome 9 and the ring 10 can transmit sound more sensitively. The sheet 19 increases the strength of the dome 9 and makes the sound quality better. The dust cover 11 is buckled on the top of the iron frame 1 to prevent dust from entering and affect the sound quality. It can also protect the sound film 8. Through the dust cover 11 The upper pores 12 carry out sound diffusion.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (7)

1. A micro-speaker for a mobile phone, comprising an iron frame (1), is characterized in that: the bottom of the iron frame (1) is provided with a circular groove (2), and the bottom of the circular groove (2) inner cavity A central magnetic core (3) is fixedly bonded, an iron sheet (4) is arranged on the top of the central magnetic core (3), and an auxiliary magnetic core (5) is arranged on the iron sheet (4). (5) a voice coil frame (6) is provided on the top, and the voice coil frame (6) is fixedly connected to the iron frame (1), and a voice coil (7) is provided inside the voice coil frame (6), The top of the voice coil (7) is fixedly connected to the sound membrane (8), the center of the sound membrane (8) is provided with a ball top (9) and a ring (10), and the ring (10) is arranged on the Dome (9) edge, the top of the dome (9) is provided with a dust cover (11), the dust cover (11) is evenly distributed with some pores (12), and the dust cover ( 11) Buckle on the top of the iron frame (1), an anti-pressure gasket (13) is also provided between the dust cover (11) and the top of the iron frame (1), and the iron frame (1) A terminal (14) is provided at the bottom end, and a lead plug (15) is provided on one side of the terminal (14), and the lead plug (15) is connected with the wire of the terminal (14). 2. A micro-speaker for a mobile phone according to claim 1, characterized in that: the iron frame (1) is square in shape and made of stainless steel. 3. A kind of micro-speaker for mobile phone according to claim 1, characterized in that: the center of the iron sheet (4) is welded with a permeable tube (16), and the secondary magnetic core (5) is sleeved on the Permeable tube (16) outer wall. 4. A kind of micro-speaker for mobile phone according to claim 1, characterized in that: said ring (10) comprises an inner ring (17) and an outer ring (18) connected to each other, and said inner ring The ring (17) is raised in the opposite direction to said outer collar (18). 5. A micro-speaker for mobile phone according to claim 1, characterized in that: the bottom end of the voice coil (7) is located between the inner wall of the circular groove (2) and the central magnetic core (3). between. 6. The micro-speaker for mobile phone according to claim 1, characterized in that: the edge of the sound film (8) is fixedly arranged between the top of the iron frame (1) and the anti-pressure washer (13). Between, and the anti-pressure gasket (13) is made of rubber. 7. A micro-speaker for a mobile phone according to claim 1, characterized in that: the inner cavity of the dome (9) is filled with a reinforcement sheet (19), and the reinforcement sheet (19) is a mica sheet.