CN204697285U - micro speaker - Google Patents

Abstract

The utility model discloses a kind of Microspeaker, involving vibrations system and auxiliary system, vibrational system comprises vibrating diaphragm and to bond fixing voice coil loudspeaker voice coil with vibrating diaphragm, the protecgulum that auxiliary system comprises shell and matches with shell, the edge of vibrating diaphragm is provided with joint portion, and joint portion and protecgulum bond fixing, the end face be connected of protecgulum are provided with the glue groove of depression with joint portion, the adhesive surface of the corresponding vibrating diaphragm of glue groove and protecgulum is arranged, and is loop configuration.Microspeaker of the present utility model, effectively can solve the problem of the waterproof ability reduction caused because gluing is uneven, improve the water resistance of product.

Description

micro speaker

technical field

The utility model relates to the field of electroacoustics, in particular to a miniature loudspeaker.

Background technique

As a device capable of converting electrical energy into sound energy, a microspeaker is widely used in terminal electronic devices such as mobile phones, MP3s, and PDAs. However, for micro-speakers, sound generation is only a basic function. In order to meet the market demand and create greater convenience for consumers’ daily use, it is often accompanied by the design of some other functions, such as waterproof. When terminal electronic devices such as mobile phones are in use, if they accidentally fall into the water or get wet, the waterproof design of the micro-speaker will be an important condition to ensure that the product can still work normally.

Existing waterproof micro-speaker products, as the front cover of the auxiliary system, are often designed as a plane or with a raised structure, so that when bonding with the diaphragm of the vibration system, it is necessary to ensure that the glue has a sufficient coverage area or has a certain In order to improve the waterproof ability of the product. However, this kind of waterproof design scheme cannot effectively solve the problem of product waterproof ability decline caused by uneven glue coating.

Utility model content

The technical problem to be solved by the utility model is: to provide a micro-speaker, so that the adhesive tape bonded between the front cover and the vibrating membrane has a certain glue storage capacity, which can effectively solve the problem of uneven glue application, thereby improving the waterproof ability of the product .

In order to achieve the above object, the utility model adopts the following technical solutions: a micro-speaker, including a vibration system and an auxiliary system; the vibration system includes a diaphragm and a voice coil bonded and fixed with the diaphragm; the auxiliary system includes The shell and the front cover matched with the shell, wherein, the edge of the diaphragm is provided with a joint; the joint is bonded and fixed to the front cover; the front cover is connected to the joint A recessed glue-holding groove is provided on the end surface of the top; the glue-holding groove is arranged corresponding to the bonding surface of the diaphragm and the front cover, and is in an annular structure.

As an improvement, the glue-holding groove is a structure that is recessed from the side of the bonding surface away from the diaphragm.

As an improvement, the glue holding tank is a structure formed by removing materials.

As an improvement, the section of the glue holding tank is square.

As an improvement, the glue-holding groove has a depth of 0.05-0.1mm and a width of 0.15-0.2mm.

As an improvement, a magnetic circuit system is also included; the magnetic circuit system is a single magnetic circuit structure or a multi-magnetic circuit structure.

As an improvement, the magnetic circuit system is a single magnetic circuit structure, including a frame, a magnet fixed in the frame, and a washer covering the surface of the magnet.

As an improvement, a reinforcing part is combined at the middle position of the diaphragm.

Compared with the prior art, in the micro-speaker of the present utility model, the edge of the diaphragm is provided with a bonding portion bonded to the front cover, and the end face of the front cover connected to the diaphragm bonding portion is provided with a concave At the same time, the glue-holding groove is set corresponding to the bonding surface of the diaphragm and the front cover, and has a ring structure. This kind of structural design adds a groove to the coating tape of the front cover, so that the coating tape of the front cover has a It has a certain ability to store glue, and it can store glue during the bonding process with the diaphragm, thus effectively solving the problem of reduced waterproof ability of micro-speaker products caused by uneven glue application, thereby improving the waterproof performance of the product.

Description of drawings

Fig. 1 is the explosion diagram of the utility model miniature loudspeaker structure;

Fig. 2 is the sectional schematic diagram of the structure of the utility model miniature loudspeaker;

Fig. 3 is the three-dimensional view of the front cover structure of the micro-speaker of the present invention;

Fig. 4 is the schematic cross-sectional view of the structure of the front cover of the micro-speaker of the present invention;

Fig. 5 is the schematic diagram of bonding of the micro-speaker diaphragm and the front cover of the utility model;

Fig. 6 is a schematic cross-sectional view of the bonding of the micro-speaker diaphragm and the front cover of the utility model;

Fig. 7 is an enlarged view of part A in Fig. 6;

The reference signs include: 1. Basin frame, 2. Magnet, 3. Washer, 4. Diaphragm, 41. Joint part, 5. Reinforcement part, 6. Voice coil, 7. Shell, 8. Front cover , 9, capacity glue tank, 10, bonding surface.

Detailed ways

Below in conjunction with accompanying drawing, describe the utility model content in detail:

Example:

Referring to FIGS. 1-2 , this embodiment shows a microspeaker with a single magnetic circuit structure, including a magnetic circuit system, a vibration system and an auxiliary system. Among them, the magnetic circuit system includes a pot frame 1, a magnet 2 and a washer 3 accommodated in the pot frame 1, the magnet 2 is bonded to the pot frame 1, and the washer 3 covers the surface of the magnet 2; the vibration system includes a diaphragm 4 And the voice coil 6 bonded and fixed with the diaphragm 4, at the same time, in order to enhance the acoustic performance of the product at high frequencies, the middle position of the diaphragm 4 is also combined with a reinforcing part 5; the auxiliary system includes a shell 7 and a shell 7 Cooperating with the front cover 8, the shell 7 cooperates with the front cover 8 to form a cavity for accommodating the above-mentioned magnetic circuit system and vibration system. Generally speaking, the casing 7 is injection-molded with conductive terminals for connecting the internal and external circuits of the micro-speaker, which are welded and fixed with the leads of the voice coil 6 inside the product, and the external current signal is transmitted to the voice coil 6 through the conductive terminals, and the voice coil 6 After receiving the alternating current signal, it will reciprocate and cut the magnetic force line under the action of the electromagnetic field, and the displacement will change, driving the vibrating membrane 4 connected to it to vibrate, thereby radiating sound waves to the outside.

In the micro-speaker of this embodiment, the edge of the diaphragm 4 is provided with a joint portion 41 , and the joint portion 41 is bonded and fixed to the front cover 8 . As shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, a recessed glue-holding groove 9 is provided on the end face of the front cover 8 connected with the joint part 41, and the label 10 is the front cover 8 and the vibrator. As for the bonding surface of the film 4, it can be seen that the glue-holding groove 9 is set corresponding to the bonding surface 10 of the two, and as shown in FIG. 3 , the glue-holding groove 9 has an annular structure.

Through the above-mentioned technical scheme, a recessed glue-holding groove 9 is provided on the end face of the front cover 8 connected to the diaphragm, so that the coated tape of the front cover 8 has a certain ability to store glue, and it can be glued to the diaphragm joint 41. In the process of fixing the knot, glue can be stored; in this technical solution, the glue-holding groove 9 is set corresponding to the bonding surface 10 of the front cover 8 and the diaphragm 4, and is a ring structure, which ensures that the entire adhesive tape of the front cover 8 can be It has the ability to store glue, so it can effectively solve the problem of the decline of waterproof ability caused by uneven glue application, and then improve the waterproof performance of this kind of micro-speaker products.

Preferably, the glue-receiving groove 9 is a structure in which the bonding surface 10 between the front cover 8 and the diaphragm 4 is recessed toward a side away from the diaphragm 4 .

Preferably, the glue-holding groove 9 is a structure formed by removing material, specifically, the glue-holding groove 9 is formed by removing material from the end surface of the front cover 8 connected to the diaphragm joint 41 .

Preferably, referring to FIG. 4 , FIG. 6 and FIG. 7 , the cross section of the glue container 9 is square. It should be noted that, during implementation, the cross section of the glue holding tank 9 is not limited to the square structure described here, and may also be in other shapes, which are not specifically limited.

Preferably, the depth of the glue-holding groove 9 is 0.05-0.1 mm, and the width is 0.15-0.2 mm. This is only a reference range for implementation, but it does not need to be strictly limited to the range of the above-mentioned depth and width during specific implementation. within.

In addition, it should be noted that this technical solution is not only applicable to the micro-speaker with a single magnetic circuit structure shown in this embodiment, it is also applicable to micro-speaker products with other magnetic circuit structures, such as having a center magnet and two side magnets at the same time The magnetic circuit structure or the magnetic circuit structure with the center magnet and four side magnets at the same time, etc. In other words, this technical solution can be popularized and applied in micro-speaker products with other magnetic circuit structures.

The above is only an implementation example of the utility model, and is not intended to limit the utility model, but any equivalent modification or change made by those of ordinary skill in the art based on the content disclosed in the utility model should be included in the scope of protection recorded in the claims Inside.

Claims (8)

1. a Microspeaker, involving vibrations system and auxiliary system; Described vibrational system comprises vibrating diaphragm and to bond fixing voice coil loudspeaker voice coil with described vibrating diaphragm; The protecgulum that described auxiliary system comprises shell and matches with described shell, is characterized in that: the edge of described vibrating diaphragm is provided with joint portion; Described joint portion and described protecgulum bond fixing; The end face be connected with described joint portion of described protecgulum is provided with the glue groove of depression; The adhesive surface of the corresponding described vibrating diaphragm of described glue groove and described protecgulum is arranged, and is loop configuration.

2. Microspeaker according to claim 1, is characterized in that: described glue groove is the structure caved in the side away from described vibrating diaphragm by described adhesive surface.

3. Microspeaker according to claim 2, is characterized in that: described glue groove is the structure that material is formed.

4. Microspeaker according to claim 3, is characterized in that: the section of described glue groove is square.

5. Microspeaker according to claim 4, is characterized in that: the degree of depth of described glue groove is 0.05-0.1 ㎜, and width is 0.15-0.2 ㎜.

6. Microspeaker according to claim 1, is characterized in that: also comprise magnetic circuit system; Described magnetic circuit system is single magnetic structure or multipath magnetic circuit structure.

7. Microspeaker according to claim 6, is characterized in that: described magnetic circuit system is single magnetic structure, comprises frame, is fixed on the magnet in described frame and is covered in the washer of described magnet surface.

8. Microspeaker according to claim 1, is characterized in that: the centre position of described vibrating diaphragm is combined with reinforcement part.