CN103338424A - Micro loudspeaker - Google Patents

Abstract

The invention discloses a micro loudspeaker, which comprises a supporting unit, a magnetic circuit unit and a vibration unit, wherein the supporting unit comprises a frame-shaped bracket and a frame cover coated on the bracket; the magnetic circuit unit comprises a magnetic frame fixed on the bracket, magnetic steel arranged in the magnetic frame, and a pole core arranged on the magnetic steel; and the vibration unit comprises a sound film covered on and adhered to upward side of the bracket and a sound coil fixed on the lower surface of the sound film. According to the invention, the frame cover of the micro loudspeaker is coated on the bracket, and the bracket is accommodated inside the frame cover, thereby having the characteristics of high dimensional accuracy and good waterproof performance.

Description

A kind of Microspeaker

Technical field

The present invention relates to a kind of loud speaker, specifically a kind of Microspeaker that is applicable to digital products such as mobile phone, notebook computer.

Background technology

Microspeaker is a kind ofly to convert the electrical signal to acoustical signal and be radiated airborne electroacoustic transducer, as pronunciation part, is widely used in digital products such as mobile phone, notebook computer.

Existing Microspeaker mainly comprises protecgulum, support and places support interior magnetic circuit unit and vibration unit.Wherein, preceding being covered on the support, and bonding with glue, the relative position of the two is difficult for fixing, substantially by manual operation, can't guarantee consistency of product again, causes the product appearance size difference bigger.

Along with the miniaturization of digital products such as mobile phone design, lightening trend, more and more higher to the dimensional requirement of Microspeaker, the apparent size precision of existing Microspeaker can not satisfy market demands.

In addition, according to the structure of existing Microspeaker, the glue layer between protecgulum and the support directly is exposed in the atmosphere and contacts with the external world, in case run into water, moisture is easy to enter inside loudspeakers by glue layer, causes line short and loud speaker was lost efficacy.

Summary of the invention

The object of the present invention is to provide a kind of dimensional accuracy height, Microspeaker that water resistance is good.

For achieving the above object, the present invention is by the following technical solutions:

A kind of Microspeaker comprises:

Support unit, it comprises that the support of frame type and the frame that coating is located on the described support cover;

Magnetic circuit unit, it comprises the magnet frame that is nested with in described support, be arranged at the magnet steel in the described magnet frame and be arranged on pole piece on the described magnet steel;

Vibration unit, it comprises the voice coil loudspeaker voice coil that covering is adhered to the sound film of described support top and is fixed in the lower surface of described sound film.

Preferably, the sidewall of described support fixes with the sidewall of described frame lid and cooperates.

Preferably, the side wall inner surfaces of described frame lid is provided with draw-in groove, and the sidewall outer surface correspondence position of described support is provided with the buckle that is mated.

Preferably, be provided with a step near side-walls on the described frame tops inner surface, described sound film is pressed on the described support by described step.

Preferably, described step is right angle step.

Preferably, the width of described step is more than or equal to 0.3mm.

After adopting technique scheme, the present invention compares with existing background technology, has following advantage:

(1) the frame lid coats and is located on the support, and support is housed in frame lid inside, make the apparent size of product only depend on the frame lid, and the size of frame lid is easy to control, and consistency of product is good, the dimensional accuracy height.

(2) the frame lid will carry out effective isolation between inside loudspeakers and the external world, and water resistance is good.

(3) by fix cooperating the connection that realizes frame lid and support, assemble more conveniently, saved manpower, production efficiency significantly improves.

(4) reduced the infringement of glue bonding to the sound film properties, reduced the lowest resonance frequency of product, bass effect is good.

Description of drawings

Fig. 1 is the stereochemical structure exploded view of Microspeaker of the present invention;

Fig. 2 is the sectional view of Microspeaker of the present invention

Embodiment

In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in restriction the present invention.

Referring to Fig. 1, the invention discloses a kind of Microspeaker, it comprises support unit 100, magnetic circuit unit 200 and vibration unit 300.

Support unit 100 comprises support 110 and frame lid 120.Support 110 is frame type support, and frame lid 120 coats to be located on the support 110, and the sidewall of support 110 fixes with the sidewall of frame lid 120 and cooperates.In the present embodiment, the sidewall outer surface of support 110 is provided with buckle 111, and the side wall inner surfaces of frame lid 120 is provided with draw-in groove 121, and buckle 111 and draw-in groove 121 are worked in coordination, and support 110 and frame lid 120 is fixing.Draw-in groove 121 can connect the sidewall of frame lid 120, also can not connect the sidewall of frame lid 120, and in the present embodiment, draw-in groove 121 is for connecting the sidewall of frame lid 120.

Magnetic circuit unit 200 comprises magnet frame 210, magnet steel 220 and pole piece 230.Wherein, magnet frame 210 is fixed on the support 120; Magnet steel 220 is arranged in the magnet frame 210; Pole piece 230 is arranged on the magnet steel 220.

Vibration unit 300 comprises sound film 310 and voice coil loudspeaker voice coil 320.Wherein, sound film 310 is covered in support 120 tops, and is bonded as one with glue and support 120; Voice coil loudspeaker voice coil 320 is fixedlyed connected with sound film 310 lower surfaces, and is placed on outside magnet steel 220 and the pole piece 230.

Support 110 and frame lid 120 are plastic material, in the assembling process, support 110 and frame lid 120 are aimed at, and apply external force the two is covered, the sidewall of frame lid 120 is subjected to the thrust generation elastic deformation of buckle 111 and expands outwardly, make support 110 enter frame and cover 120 inside, buckle 111 passes draw-in groove 121.After buckle 111 passed draw-in groove 121, the thrust that the sidewall of frame lid 120 is subjected to disappeared, and frame lid 120 restores to the original state, and buckle 111 blocks draw-in groove 121, and frame lid 120 and support 110 is fixing.

Support 110, magnetic circuit unit 200 and vibration unit 300 all are housed in the inside of frame lid 120, make between inside loudspeakers and the external world to have good isolation, have prolonged moisture penetration and have entered the path of inside loudspeakers, and water resistance is better; Simultaneously, the apparent size of product is determined separately by frame lid 120, has reduced the factor that influences the product appearance size, only needs can guarantee by the dimensional tolerance of controller chassis lid 120 the apparent size precision of product.

Referring to Fig. 2, frame covers on 120 top inner surface and is provided with step 122 near side-walls, step 122 is right angle step, and be crimped on sound film 310 edges, at this moment, the edge of sound film 310 is pressed between step 122 and the support 110, under the effect of extruding force, sound film 310 forms good sealing with support 110 and frame lid 120 respectively, forms reliable sealing surface for guaranteeing step 122 and sound film 310, and the width of step 122 should be not less than 0.3mm.In addition, step 122 has certain height, and guaranteeing has enough big gap between frame lid 120 and the sound film 310, and the space of vibration is provided for sound film 310.

The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (6)

1. Microspeaker is characterized in that: comprises,

Support unit, it comprises that the support of frame type and the frame that coating is located on the described support cover;

Magnetic circuit unit, it comprises the magnet frame that is nested with in described support, be arranged at the magnet steel in the described magnet frame and be arranged on pole piece on the described magnet steel;

Vibration unit, it comprises the voice coil loudspeaker voice coil that covering is adhered to the sound film of described support top and is fixed in the lower surface of described sound film.

2. a kind of Microspeaker as claimed in claim 1 is characterized in that: the sidewall of described support fixes with the sidewall of described frame lid and cooperates.

3. a kind of Microspeaker as claimed in claim 2 is characterized in that: the side wall inner surfaces of described frame lid is provided with draw-in groove, and the sidewall outer surface correspondence position of described support is provided with the buckle that is mated.

4. as claim 1,2 or 3 described a kind of Microspeakers, it is characterized in that: be provided with a step near side-walls on the described frame tops inner surface, described sound film is pressed on the described support by described step.

5. a kind of Microspeaker as claimed in claim 4, it is characterized in that: described step is right angle step.

6. a kind of Microspeaker as claimed in claim 5, it is characterized in that: the width of described step is more than or equal to 0.3mm.

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