WO2018149093A1

WO2018149093A1 - Sound production device module and electronic product

Info

Publication number: WO2018149093A1
Application number: PCT/CN2017/094170
Authority: WO
Inventors: 马宏达; 谭飞
Original assignee: 歌尔股份有限公司
Priority date: 2017-02-17
Filing date: 2017-07-24
Publication date: 2018-08-23

Abstract

Disclosed are a sound production device module and an electronic product. The sound production device module comprises a single sound production device, a module shell and a flexible circuit board; the single sound production device is provided in the module shell, the body part of the flexible circuit board is laid on the outer surface of the module shell, the flexible circuit board is provided with two single electric connection areas extending from the body part, and the two single electric connection areas are configured to stretch into the module shell from the outer side of the module shell so as to be electrically connected with the single sound production device. The present invention has a technical effect of saving the space of the sound production device module.

Description

Sound device module and electronic products

Technical field

The invention belongs to the technical field of electronic products, and in particular, the invention relates to a sounding device module and an electronic product.

Background technique

In recent years, the related technologies of consumer electronic products have developed rapidly, the performance of electronic products has been significantly improved, and the speed of updating has been accelerated. Consumers are also increasingly demanding the performance of electronic products. In the prior art, development trends of product devices such as mobile phones and tablet computers include thin and light, large power, and the like. Under this development trend, it is necessary to limit the overall volume and thickness of the product equipment, but it is also necessary to configure a larger battery for the product equipment. This design requirement results in a reduction in the space configured for other components in the product equipment. It is desirable to reduce the volume of the various components in the device.

The sounding device module is a component occupying a large space in an electronic product, and the sounding device module is generally in a flat rectangular structure. Those skilled in the art attempt to reduce the space occupied by the sounding device module, for example, to reduce the width of the sounding device module, and to make the sounding device module tend to a strip structure. However, in some existing designs, an antenna is also provided on the sounding device module. In order to ensure the reliability of the antenna, the antenna is required to be as far as possible from the sounding device on the back of the sounding device module to avoid mutual interference. This design, in turn, requires the sounding device module to have a large volume so that the sounding device and the antenna can be separated from each other.

Therefore, it is necessary to improve the structure of the sounding device module, and save the space or reduce the volume of the sounding device module while ensuring the performance of the sounding device module.

Summary of the invention

It is an object of the present invention to provide a new technical solution for a sounding device module.

According to a first aspect of the present invention, a sound emitting device module is provided, comprising: a sounding device a unit, a module housing and a flexible circuit board, wherein the sounding device is disposed in the module housing, and the body portion of the flexible circuit board is laid on an outer surface of the module housing. The flexible circuit board has two single electrical connection regions extending from the body portion, and the two single electrical connection regions are configured to extend from the outer side of the module housing into the module housing, and The sounding device unit is electrically connected.

Optionally, the outer surface of the module housing has a circuit board slot, and the body portion of the flexible circuit board is embedded in the circuit board slot.

Optionally, the body portion of the flexible circuit board is adhesively fixed on an outer surface of the module housing.

Optionally, the surface of the body portion of the flexible circuit board for bonding with the module housing is covered with a backing layer.

Optionally, the module housing has a sidewall, and a body portion of the flexible circuit board is laid on the sidewall.

Optionally, a first sound outlet is defined in a sidewall of the module housing, and the sounding device is disposed on a side of the module housing that is away from the first sound outlet. Inside the side wall, the body portion of the flexible circuit board is laid on the outside of the side wall of the module housing away from the side of the first sound outlet.

Optionally, the module housing includes a lower cover and an upper cover, the upper cover is configured to be fastened to the lower case, and the body portion of the flexible circuit board is laid on an outer surface of the lower case And a notch for avoiding the two electrical connection regions of the plurality of cells is disposed on the upper end surface of the sidewall of the lower casing, and the upper cover is correspondingly provided with a protrusion for blocking the notch.

Optionally, an area of the outer surface of the module housing from the first sound outlet to the sounding device unit is an antenna clearance area, and an antenna is disposed in the antenna clearance area.

The invention also provides an electronic product comprising a product body and the sounding device module, wherein the product body has a sounder slot, and the sounding device module is disposed in the sounder slot.

The invention also provides an electronic product comprising a product body and the sounding device module, wherein the product body has a sounder slot, and the sounding device module is disposed in the sounder slot in;

a second sound outlet is disposed on a sidewall of the product body, a first sound outlet of the sounding device module is in communication with the second sound outlet, and the second body of the electronic product is The area between the sound outlet to the sounding device unit is an antenna clearance area, and an antenna is disposed in the antenna clearance area.

The inventors of the present invention have found that in the prior art, the circuit traces of the sounding device module are basically disposed inside the module. These traces take up a large portion of the module's space. However, those skilled in the art, in designing a solution for reducing the volume of the sounding device module, start from the idea of how to modify the module housing structure and reduce the volume of the internal device. No consideration has been given to moving unnecessary internal components to the outside of the module, especially circuit traces. Therefore, the technical task to be achieved by the present invention has never been or is not expected by those skilled in the art, so the present invention is a new technical solution.

Other features and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

DRAWINGS

The accompanying drawings, which are incorporated in FIG

1 is a schematic view showing the disassembly of a sound emitting device module provided by the present invention;

2 is a schematic diagram of plugging in a module housing of the sounding device module provided by the present invention;

3 is a side cross-sectional structural view of the sound emitting device module provided by the present invention;

Figure 4 is a partial enlarged view of Figure 3;

FIG. 5 is a schematic exploded view of a speaker module according to another embodiment of the present application; FIG.

Figure 6 is a combination view of the speaker module provided in Figure 5 - the first housing is not combined;

Figure 7 is a combination diagram of Figure 6;

Figure 8 is a cross-sectional view taken along line A-A of Figure 7;

Fig. 9 is a enlarged view of a portion B of Fig. 8;

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention unless otherwise specified.

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques, methods and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but the techniques, methods and apparatus should be considered as part of the specification, where appropriate.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

The invention provides a sounding device module, which comprises at least a sounding device unit 1, a module housing and a flexible circuit board 3, as shown in FIG. The module housing is configured to carry the sounding device unit 1 and the flexible circuit board 3, and the sounding device unit 1 is disposed inside the module housing, as shown in FIG. 2 .

The flexible circuit board 3 includes two regions of a single electrical connection region 31 and a body portion 32. In particular, the body portion 32 of the flexible circuit board 3 is laid on the outer surface of the module housing as shown in FIG. Two of the unit electrical connection regions 31 extend from the body portion 32 for electrically connecting to the sounding device unit 1, and the unit electrical connection region 31 can be external to the module housing. The surface extends into the interior of the module housing to contact the pads or electrical connection points on the sounding device unit 1. The module housing may be provided with corresponding holes for the unit electrical connection area 31 to extend from the outside of the housing to the inside of the housing to achieve electrical connection with the sounding device unit 1.

In the design of a conventional sounding device module, the circuit traces occupy the space inside the module housing. For example, in the width direction of the sounding device module, the circuit board itself has a certain width, Moreover, a certain gap is required between the circuit board and the sounding device unit. This will increase the overall width of the module housing. If the body portion of the flexible circuit board is disposed on the outer surface of the module housing, the space may not be reserved in the module housing. The space saved can be reserved as an assembly space for other components, or the width of the module housing can be reduced to reduce the space occupied by the sounding device module as a whole.

The technical solution of the present invention is different from the conventional design ideas of the prior art, and adopts technical features that are not easily adopted by those skilled in the art. Moreover, the production process of the sounding device module provided by the present invention does not increase in difficulty, and is convenient for actual production.

Preferably, as shown in FIGS. 3 and 4, the outer surface of the module housing may have a circuit board slot 21. The circuit board slot 21 is for receiving the body portion 32 of the flexible circuit board 3, and the body portion 32 is embedded in the circuit board slot 21. The circuit board slot 21 can function to position and fix the body portion 32. The body portion 32 of the flexible circuit board 3 is prevented from being displaced, deformed, or worn. In the embodiment shown in FIGS. 1-3, the body portion 32 on the outer side of the module housing has a strip shape, and accordingly, the circuit board slot 21 also has a matching shape. In other embodiments, the body portion of the flexible circuit board may also be a rectangular sheet or other shape. The board slot is preferably configured to match the shape of the flexible circuit board.

In the different embodiments of the present invention, the flexible circuit board 3 can be fixed on the outer surface of the module housing in different manners, such as bonding, snapping, etc., which is not limited by the present invention. Alternatively, as shown in FIGS. 3 and 4, the flexible circuit board 3 may be attached to the outer surface of the module housing by adhesive bonding. Preferably, the side surface of the body portion 32 for bonding with the module housing may be covered with a backing layer 4. The body portion 32 is adhered to the module housing by the adhesive layer 4.

Optionally, the present invention does not limit the specific location of the flexible circuit board on the module housing, and may be selectively designed according to the performance and shape requirements of the specific product. For example, the flexible circuit board can be laid on the top or bottom surface of the module housing.

As shown in FIG. 2-4, the module housing has a flat rectangular structure as a whole, and the module housing has a side wall. Preferably, the body portion 32 of the flexible circuit board 3 may be laid on the side wall. The above-mentioned circuit board slots 21 are also correspondingly disposed on the side walls. Setting the flexible circuit board 3 The space occupied by the body portion 32 can be more effectively reduced on the side wall of the module housing, and conditions for reducing the volume of the sounding device module are provided. Moreover, a larger surface such as a top surface or a bottom surface of the module housing can be used to provide other components.

As shown in FIG. 3, a first sound outlet 28 may be formed on a sidewall of the module housing. The first sound outlet 28 is configured to enable sound generated by the sounding device unit 1 to be transmitted from the first sound outlet 28. The first sound outlet 28 is disposed at the side wall position of the module housing, and can meet the special requirements of the electronic product for the performance and structure of the sounding device module. In particular, in this embodiment, the sounding device unit 1 can be disposed inside the side wall of the module housing away from the first sound outlet 28, as shown in FIG. 2 and FIG. Shown. The body portion 32 is preferably laid on a side wall of the module housing on a side away from the first sound outlet 28, as shown in FIG.

Optionally, as shown in FIG. 1 and FIG. 2, the module housing may include a lower shell 29 and an upper cover 23, and the upper cover 23 is fastened to the lower shell 29 to form a complete module housing. . The flexible circuit board 3 may be laid on the outer surface of the lower case 29. In particular, the upper end surface of the side wall of the lower case 29 may be provided with a notch for escaping the two electrical connection regions 31. The unit electrical connection region 31 is configured to extend from the notch into the interior of the module housing. When the upper cover 23 is fastened to the lower case 29, the unit electrical connection region 31 can be sealed. Correspondingly, the upper cover 23 can be correspondingly provided with a protrusion for blocking the notch. This structural design provides a convenient assembly of the flexible circuit board 3, and there is no need to open a through hole for the single electrical connection region 31 to pass through the module housing.

Optionally, as shown in FIG. 1 and FIG. 2, the flexible circuit board 3 may further have an external electrical connection region 33 configured to be electrically connected to an external electronic device. For example, the sounding device module will eventually be assembled in the mobile phone, and the external electrical connection area 33 is used for electrical connection with the electrical connection point on the main body of the mobile phone. Thereby, the electrical signal on the main body of the mobile phone can be transmitted into the sounding device unit to realize sound generation.

In particular, in the embodiment in which the first sound outlet is disposed on the sidewall of the housing, the area between the first sound outlet 28 and the sounding device unit 1 on the outer surface of the module housing is the antenna clearance. In the area, an antenna may be disposed in the clearance area. In order to avoid interference of the metal parts to the antenna, the distribution position of the antenna needs to be separated from the sounding device unit, and the above-mentioned antenna clearance area can meet such mutually separated performance requirements. In the technical solution of the present invention, due to the flexible circuit board The body portion is disposed on the outer surface of the module housing, so that a part of the space is saved inside the module housing. The assembly position of the sounding device unit can be moved to the saved space, thereby avoiding more space on the other side for setting the antenna. Therefore, the antenna can be disposed at a position where the first sound outlet is located. The assembly position of the sounding device unit is offset to the side away from the sound outlet port, thereby better achieving the avoidance effect of the antenna and the single body.

The invention also provides an electronic product, which can be a mobile phone, a tablet computer or the like. The electronic product includes a product body and the above sound emitting device module. The product body may have a sounder slot, and the sounding device module is disposed in the sounder slot. Alternatively, an electrical connection point on the electronic product can be disposed in the sounder slot, and when the sounding device module is assembled into the sounder slot, the two can directly form an electrical connection. Simplify the steps of assembly and electrical connection.

The invention also provides an electronic product, which also comprises a product body and a sounding device module, and the sounding device module is arranged in the sounder slot of the product body. In particular, the first sound outlet is disposed on the sounding device module used in the electronic product. A second sound outlet is further disposed on a sidewall of the product body. The first sound outlet of the sounding device module is in communication with the second sound outlet. The entire area of the main body of the electronic product from the second sound outlet to the sounding device unit may be an antenna clearance area. In the antenna clearance area, an antenna may be provided.

The application also provides a speaker module. As shown in FIG. 5, FIG. 7 and FIG. 8, a speaker module includes a casing, and the casing is composed of a first casing 10 and a second casing 20 which are combined together, and the first casing 10 and the second casing The speaker unit 30 is housed in a space surrounded by the body 20. The speaker unit 30 divides the entire module cavity into two chambers, the front sound chamber 60 and the rear sound chamber 62. The front sound chamber 60 is formed between the speaker unit 30 and the second housing 20, and the front sound chamber 60 is disposed in the second shell. The sound hole 22 on the side wall of the body 20 communicates with the outside to radiate sound emitted from the speaker unit 30; the rear sound chamber 62 is formed between the speaker unit 30, the first housing 10 and the second housing 20. The speaker module also includes a flexible circuit board 40 for electrically connecting the speaker unit 30 to an external circuit.

As shown in FIG. 5, FIG. 6, and FIG. 7, the flexible circuit board 40 includes a first body portion 46 and a second body portion 48 that are connected, and the first body portion 46 and the second body portion 48 are both strip-shaped structures. And the extension direction is the same. Both ends of the first main body portion 46 are bent and extended toward the same side and are provided with a pad portion 42. The two pad portions 42 are oppositely extended and electrically connected to the two pads of the speaker unit 30, respectively. One of the pad portions 42 is connected to the second body portion 48, and the extending direction is the same as the extending direction of the first body portion 46, and the second body portion 48 is disposed at the pad portion 42 away from the other pad portion 42. At one end, the end of the second body portion 48 is provided with an outer connecting portion 44, and the outer connecting portion 44 is electrically connected to an external circuit. Of course, the second main body portion 48 can also be directly connected to the first main body portion 46. In this embodiment, the second main body portion 48 and the one pad portion 42 are connected to each other, and the structure is simpler and the space is smaller. The preferred solution.

As shown in FIG. 5, FIG. 6, and FIG. 7, the first main body portion 46 is laid on the outer surface of the outer casing. In the present embodiment, the first main body portion 46 is laid on the outer surface of one side wall of the second casing 20. At least one of the two land portions 42 extends across the end of the side wall into the outer casing and is electrically connected to the speaker unit 30. In the present embodiment, it is preferred that both of the land portions 42 straddle the side wall. The end portion extends into the outer casing and is electrically connected to the speaker unit 30. The end portion of the side wall is respectively provided with a avoidance notch 28 corresponding to the portion of the two pad portions 42 extending into the outer casing. The two pad portions 42 respectively from the two avoidance notches 28 The portion extends into the outer casing, and after the first casing 10 and the second casing 20 are combined, the rubber seal can be applied at the two avoidance notches 28. The side wall on which the first main body portion 46 is laid is disposed opposite to the side wall on which the sound hole 22 is provided, and the first body portion 46 is laid on the side wall of the second casing 20 away from the sound hole 22. On the outer side, the speaker unit 30 is disposed on the inner side of the side wall of the first body portion 46, that is, the speaker unit 30 is disposed on the inner side of the side wall of the second casing 20 away from the sound hole 22. The second body portion 48 is laid inside the outer casing, and the outer connecting portion 44 passes out of the outer casing at the outer side of the outer casing. Between the speaker unit 30 and the side wall provided with the sound hole 22 is an antenna clearance area.

As shown in FIG. 5 and FIG. 9 , the sidewall of the second housing 20 corresponding to the first main body portion 46 is provided with a receiving groove 24 , and the first main body portion 46 is adhesively laid on the receiving groove through the adhesive layer 50 . The shape and size of the accommodating groove 24 are adapted to the shape and size of the first main body portion 46, and the depth of the accommodating groove 24 is greater than or equal to that of the first main body portion 46 after the adhesive layer 50 is superposed. The thickness of the first main body portion 46 does not protrude from the outer surface of the side wall of the second housing 20 after the first main body portion 46 is adhesively fixed into the accommodating groove 24. The glue layer 50 may be glued, double-sided tape or back glue. In the embodiment, the glue layer 50 is preferably a backing glue disposed on the first body portion 46. It is more convenient and will not overflow.

As shown in FIG. 5 and FIG. 7 , a heat-melting column 26 is disposed at the bottom of the accommodating groove 24 . In the present embodiment, two hot-melt columns 26 are disposed at two ends of the accommodating groove 24 , respectively. A hot melt hole 49 is disposed in each of the positions of the first body portion 46 corresponding to the two heat-melting columns 26, and a relief hole 52 is disposed at a position corresponding to the heat-melting hole 49 on the glue layer 50. At the time of assembly, the heat-melting column 26 passes through the escape hole 52 and the hot-melt hole 49, and a portion of the heat-melting column 26 exposed to the first body portion 46 is melted by a hot-melt process to form a small cap structure, and the first body portion 46 is stuck. In the accommodating groove 24, it is possible to avoid the defect that the first main body portion 46 is lifted due to failure of the adhesive layer 50 or poor adhesion.

As shown in FIG. 5 and FIG. 7, the position of the first housing 10 corresponding to the speaker unit 30 is provided with a mounting hole 12, and the shape and size of the mounting hole 12 are matched with the bottom of the speaker unit 30. After assembly of the assembly, the bottom of the speaker unit 30 (the basin of the magnetic circuit system) is located in the mounting hole 12, and the surface of the bottom of the speaker unit 30 is flush with the outer surface of the first housing 10 at which the mounting hole 12 is provided. Flat, can reduce the thickness of the speaker module.

The utility model adopts the internal and external FPCB routing mode, which saves the inner space of the speaker module, and satisfies the requirement of the speaker module width while avoiding interference between the speaker unit and the antenna clearance area, thereby ensuring the performance of the product, and also It satisfies the requirements of the structure and overall layout of the portable electronic device; and improves the intermediate frequency performance of the speaker module and improves the assembly efficiency.

From the above description, it can be understood that the present invention includes at least the following aspects.

An E1, a speaker module, comprising: a housing and a speaker unit housed in the housing, further comprising a flexible circuit board, wherein the flexible circuit board comprises a main body portion and an extension body extending from the main body portion Two pad portions electrically connected to the speaker unit, the body portion including an associated first body portion and a second body portion, the first body portion being laid on an outer surface of the outer casing, a second main body portion is laid inside the outer casing, and an end portion of the second main body portion is connected with an outer connecting portion electrically connected to an external circuit, the outer connecting portion is located outside the outer casing; the speaker unit It is disposed inside the portion of the outer casing that is away from the sound hole.

The speaker module according to E1, wherein the outer surface of the outer casing is provided with a recessed receiving groove, and the first main body portion is laid in the receiving groove.

E3. The speaker module according to E2, wherein the first body portion passes The adhesive layer is laid in the receiving groove.

The speaker module according to E3, wherein the depth of the accommodating groove is equal to or greater than a thickness of the first body portion and the glue layer after being superposed.

The speaker module according to E2, wherein the bottom of the accommodating groove is provided with a heat-melting column, and the first body portion is provided with a hot-melt hole matched with the heat-melting column.

E6. The speaker module according to E1, wherein the outer casing has a side wall, and the first main body portion is laid on the side wall.

The speaker module according to E1, characterized in that at least one of the two pad portions is electrically connected to the speaker unit by the first body portion extending into the casing.

The speaker module according to any one of the examples of E1 to E6, wherein the sound emitting hole is defined in a sidewall of the outer casing, and the speaker unit is disposed away from the outer casing of the outer casing. The inside of the side wall of one side of the sound hole, the first body portion is laid outside the side wall of the side of the outer casing away from the sound hole.

E9. The speaker module according to E8, wherein the outer casing comprises a first housing and a second housing joined together, the first main body portion being laid on one side of the second housing On the side wall, the end of the side wall is provided with a avoidance notch for the flexible circuit board to pass through.

The speaker module according to E9, wherein the first housing has a mounting hole at a position corresponding to the speaker unit, and a bottom of the speaker unit is located in the mounting hole.

In the present specification, the technical solution of the present invention is exemplified by taking the speaker module of the above structure as an example. In practical applications, the technical solution of the present invention is not limited to the speaker module of the above structure, and can be applied to any one of the following. The speaker module of the structure is especially suitable for a small-volume, complex-shaped speaker module, and those skilled in the art can apply the technical solution of the present invention to the invention according to the above embodiments without any creative labor. In other configurations of the speaker module, regardless of whether the other structure of the speaker module is the same as that of the above embodiment, any product that uses the FPCB routing method with internal and external bonding falls within the protection range of the present invention.

Although specific embodiments of the invention have been described in detail by way of example, It is to be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

A sounding device module, comprising: a sounding device unit, a module housing and a flexible circuit board, wherein the sounding device is separately disposed in the module housing, and the body portion of the flexible circuit board Laying on an outer surface of the module housing, the flexible circuit board has two single electrical connection regions extending from the body portion, and the two single electrical connection regions are configured to be The outer side of the module housing extends into the module housing to electrically connect with the sounding device unit.
The sound emitting device module according to claim 1, wherein the outer surface of the module housing has a circuit board slot, and the body portion of the flexible circuit board is embedded in the circuit board slot.
The sound emitting device module according to claim 1, wherein the body portion of the flexible circuit board is adhesively fixed to an outer surface of the module housing.
The sound emitting device module according to claim 3, wherein the surface of the body portion of the flexible circuit board for bonding to the module housing is covered with a backing layer.
The sound emitting device module according to claim 1, wherein the module housing has a side wall, and a body portion of the flexible circuit board is laid on the side wall.
The sound emitting device module according to any one of claims 1 to 5, wherein a first sound outlet is opened on a side wall of the module housing, and the sounding device is disposed on the mold The inner side of the side wall of the side of the group housing away from the first sound outlet, the body portion of the flexible circuit board is laid on the side of the side wall of the module housing away from the side of the first sound outlet .
The sound emitting device module according to claim 1, wherein the module housing comprises a lower case and an upper cover, and the upper cover is configured to be fastened to the lower case, the flexible circuit board a body portion is disposed on an outer surface of the lower case, and an upper end surface of the side wall of the lower case is provided with a notch for avoiding two of the single electrical connection regions, and the upper cover is correspondingly disposed The protrusion of the notch is blocked.
The sounding device module according to claim 6, wherein an area between the first sound outlet and the sounding device unit on the outer surface of the module casing is an antenna clearance area, and the antenna clearance is performed. An antenna is provided in the area.
An electronic product, comprising: a product body and the sounding device module according to any one of claims 1-8, wherein the product body has a sounder slot, and the sounding device module is disposed on the sounder In the slot.
An electronic product, comprising: a product body and the sounding device module according to any one of claims 1 to 7, wherein the product body has a sounder slot, and the sounding device module is disposed on the sounder In the slot;

a second sound outlet is disposed on a sidewall of the product body, a first sound outlet of the sounding device module is in communication with the second sound outlet, and the second body of the electronic product is The area between the sound outlet to the sounding device unit is an antenna clearance area, and an antenna is disposed in the antenna clearance area.