WO2019041403A1

WO2019041403A1 - Sound-producing device and method for embedding connecting flexible plate into sound-producing device

Info

Publication number: WO2019041403A1
Application number: PCT/CN2017/102742
Authority: WO
Inventors: 范双双
Original assignee: 歌尔股份有限公司
Priority date: 2017-08-31
Filing date: 2017-09-21
Publication date: 2019-03-07
Also published as: CN107509146A; CN107509146B

Abstract

A sound-producing device and a method for embedding a connecting flexible plate into the sound-producing device. The sound-producing device comprises a voice coil (6), a housing (1), a positioning plastic element (3), and the connecting flexible plate. The connecting flexible plate comprises a first electrically-conductive plate (2) and a second electrically-conductive plate (4). The first electrically-conductive plate (2) is injection molded in the housing (1) and electrically connected to one lead of the voice coil (6). The second electrically-conductive plate (4) is injection molded in the positioning plastic element (3). One extremity of the second electrically-conductive plate (4) runs out of the positioning plastic element (3) and is soldered to the first electrically-conductive plate (2); the other extremity of the second electrically-conductive plate (4) runs out of the positioning plastic element (3) and is provided with a flexible wall part (40). A contact (400) is provided on the flexible wall part (40). The positioning plastic element (3) is connected to the housing (1). Solved is the technical problem in which an existing connecting flexible plate is difficult to be arranged within a sound-producing device.

Description

Sounding device and method for embedding connecting elastic piece in sounding device

Technical field

The present invention relates to the field of electroacoustic conversion technology, and more particularly to a sound emitting device and a method of embedding a connecting elastic piece in a sound generating device.

Background technique

The connection spring is an electrical connection device for making electrical contact connections. Taking a speaker as an example, the speaker may be provided with a connection elastic piece to connect the voice coil of the speaker to the outside by installing a structure that electrically connects the connection elastic piece to the pad of the PCB board when the speaker is mounted in an electronic device such as a mobile phone. Circuit.

At present, the connecting elastic piece is generally integrally molded as an insert into the product. This method is limited by the structure of the mold, and the connecting elastic piece can only be placed at the edge of the product, which leads to limited design and assembly of other parts.

If it is necessary to set the connecting elastic piece in the middle of the product, due to the high assembly precision of the product, the connecting elastic piece is usually set in the middle part of the product by using the mold two-shot forming. This type of connection method has a complicated molding process and high cost.

Therefore, it is necessary to improve the existing connecting elastic pieces, thereby improving the setting flexibility of the connecting elastic pieces, ensuring the connection reliability, and reducing the cost.

Summary of the invention

It is an object of the present invention to provide a new technical solution for a sound generating device and a method of embedding a connecting elastic piece in a sound emitting device.

According to a first aspect of the invention, a sounding device is provided. The sounding device comprises a voice coil, a casing, a positioning plastic piece and a connecting elastic piece, the connecting elastic piece comprises a first conductive piece and a second conductive piece, the first conductive piece is injection molded in the casing and the sound is One lead of the loop is electrically connected, the second conductive sheet is injection molded into the positioning plastic piece, and one end of the second conductive piece passes through Positioning the plastic member and soldering with the first conductive sheet, the other end of the second conductive sheet passes through the positioning plastic and is provided with a elastic wall portion, and the elastic wall portion is provided with a contact, A positioning plastic member is coupled to the housing.

Optionally, the positioning plastic member is bonded to the housing.

Optionally, a positioning slot is disposed on the housing, and the positioning plastic member is connected to the positioning slot.

Optionally, the positioning slot is disposed at an intermediate position of the housing, and the elastic wall portion of the two sets of the connecting elastic pieces is located at an intermediate position of the sounding device.

Optionally, the elastic wall portion is bent and formed on a portion of the second conductive sheet exposed to the positioning plastic member.

Optionally, the portion of the second conductive sheet embedded in the positioning plastic member is bent one or more times.

Optionally, the second conductive sheet is laser welded to the first conductive sheet.

Optionally, the first conductive sheet has a first pad and a second pad exposed outside the housing, the first pad is soldered to a lead of the voice coil, and the second pad is The second conductive sheet is welded.

Optionally, the number of the connecting elastic pieces is two, wherein a first conductive piece of the one of the connecting elastic pieces is electrically connected to one lead of the voice coil, and the first of the other set of the connecting elastic pieces is electrically connected. The conductive sheet is electrically connected to the other lead of the voice coil.

According to a second aspect of the present invention, there is provided a method of embedding a connecting elastic piece in a sounding device. The method includes: providing a housing, positioning a plastic piece, inserting a first conductive piece as an insert into the housing, and inserting a second conductive piece as an insert into the positioning plastic piece, in the second a conductive member is disposed on the conductive sheet, and both ends of the second conductive sheet pass through the positioning plastic member; and the second conductive sheet is bent out of one end of the housing to form a elastic wall portion. The contact is located on the elastic wall portion; the end of the second conductive piece away from the elastic wall portion is welded to the first conductive sheet, and the positioning plastic member is connected to the housing.

The inventors of the present invention have found that the conventional connecting elastic sheets are generally integrally molded as an insert into a product. This method is limited by the structure of the mold, and the connecting elastic piece can only be placed at the edge of the product, which leads to limited design and assembly of other parts. If you need to connect the connection shrapnel in the middle of the product Position, due to the high assembly precision of the product, usually the mold is used to form the connecting elastic piece in the middle of the product. This type of connection method has a complicated molding process and high cost. Therefore, the technical task to be achieved by the present invention or the technical problem to be solved is not thought of or expected by those skilled in the art, so the present invention is a new technical solution.

In the sounding device provided by the present invention and the method of embedding the connecting elastic piece in the sounding device, the first conductive piece and the second conductive piece are respectively molded into the casing and the positioning plastic piece. The first conductive sheet and the second conductive sheet are welded to form a connecting elastic piece. The lead of the voice coil can be connected to an external circuit by connecting the shrapnel. The positioning plastic member is connected to the housing to ensure the reliability of soldering between the first conductive sheet and the second conductive sheet.

The first conductive sheet and the second conductive sheet are separately injection-molded, and the assembly position is not limited, which is beneficial to the design and layout of other parts. No need to use mold two-shot molding, the cost is reduced and easy to operate.

Soldering the first conductive sheet and the second conductive sheet to connect the positioning plastic member to the housing improves the reliability of soldering between the first conductive sheet and the second conductive sheet.

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 structural view of a sound emitting device provided in an embodiment of the present invention;

Figure 2 is a partial enlarged view of Figure 1;

3 is a schematic structural view of a positioning plastic member provided in an embodiment of the present invention;

4 is a schematic structural view of a sound emitting device provided in an embodiment of the present invention;

FIG. 5 is a schematic diagram of a method for embedding a connecting elastic piece in a sounding device according to an embodiment of the present invention.

Wherein: 1: housing; 10: lower case; 11: middle case; 12: upper case; 2: first conductive piece; 3: positioning plastic part; 4: second conductive piece; 40: elastic wall part; 400: Contact; 5: diaphragm; 6: voice coil.

Detailed ways

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.

According to an embodiment of the invention, a sounding device is provided. Referring to FIGS. 1 to 3, the sounding device includes a voice coil, a housing 1, a positioning plastic member 3, and a connecting elastic piece. The leads of the voice coil are electrically connected to an external circuit through the connection spring. The connecting elastic piece includes a first conductive sheet 2 and a second conductive sheet 4. The first conductive sheet 2 is embedded in the housing 1 . The first conductive sheet 2 is electrically connected to the leads of the voice coil.

The second conductive sheet 4 is embedded in the positioning plastic member 3. A portion of the second conductive sheet 4 is embedded in the positioning plastic member 3, and both ends of the second conductive sheet 4 pass through the positioned plastic member 3.

One end of the second conductive sheet 4 passes through the positioning plastic member 3 and is welded to the first conductive sheet 2. A portion defining the second conductive sheet 4 to pass through the positioning plastic member 3 for soldering with the first conductive sheet 2 is a welded portion.

The other end of the second conductive sheet 4 also passes through the positioning plastic member 3 to be electrically connected to an external circuit. Defining a portion of the second conductive sheet 4 that passes through the positioning plastic member 3 for electrical connection with an external circuit is a contact portion, and the positioning plastic member 3 between the solder portion and the contact portion The inner part is the inner part.

A spring wall portion 40 is provided on the contact portion. A contact 400 capable of elastically contacting a contact pad of an external circuit is provided on the elastic wall portion 40. The second conductive sheet 4 is electrically connected to an external circuit by elastic contact between the contact 400 and a contact pad of an external circuit. In addition, the first conductive sheet 2 and the second conductive sheet 4 are welded to form the connecting elastic piece, so that the lead wire of the voice coil is electrically connected to an external circuit through the connecting elastic piece.

The positioning plastic member 3 is coupled to the housing 1 . The reliability of soldering between the first conductive sheet 2 and the second conductive sheet 4 is improved.

The first conductive sheet 2 and the second conductive sheet 4 are respectively injection-molded, and the assembly position is not limited, which is beneficial to the design and layout of other components. No need to use mold two-shot molding, the cost is reduced and easy to operate.

The first conductive sheet 2 and the second conductive sheet 4 are welded, and the positioning plastic member 3 is connected to the housing 1 to improve the reliability of soldering between the first conductive sheet 2 and the second conductive sheet 4. , the degree of firmness of the connecting elastic piece is improved.

The leads of the voice coil are electrically connected to an external circuit through the connection spring. The voice coil has two leads. Correspondingly, referring to FIG. 1 and FIG. 2, the number of the connecting elastic pieces is two. The first conductive sheet 2 of one of the connecting elastic sheets is electrically connected to one lead of the voice coil, and the first conductive sheet 2 of the other set of connecting elastic sheets and another lead of the voice coil Electrical connection. The two sets of connected elastic pieces are electrically connected to an external circuit. In this way, the voice coil is electrically connected to the external circuit by the two sets of the connection springs, and an electrical signal can be input.

The manner in which the positioning plastic member 3 is attached to the housing 1 can be various.

Optionally, the positioning plastic member 3 is bonded to the housing 1 . Thus, the positions of the first conductive sheet 2 and the second conductive sheet 4 are relatively fixed, and the welding between the first conductive sheet 2 and the second conductive sheet 4 is firm.

Optionally, the positioning plastic part is snapped, screwed or otherwise connected to the housing 1.

In order to accurately position the connection position of the positioning plastic member 3, optionally, referring to FIG. 1 and FIG. 2, a positioning groove is provided on the housing 1. The positioning plastic member 3 is connected to the positioning groove. Further, referring to FIG. 1 , the positioning groove is disposed at an intermediate position of the housing 1 . The wall portion 40 is located at an intermediate position of the sounding device. Avoid limiting the design and loading of other components Match.

The elastic wall portion 40 serves to elastically contact the contact 400 with the contact pad of an external circuit. Alternatively, referring to FIG. 3, the contact portion is bent to form the elastic wall portion 40. For example, the elastic wall portion 40 may be formed by bending at a position of the contact portion adjacent to the inner fitting portion.

The soldering portion of the second conductive sheet 4 is soldered to the first conductive sheet 2 to electrically connect the first conductive sheet 2 and the second conductive sheet 4. Optionally, the second conductive sheet 4 is laser welded to the first conductive sheet 2. The solder joints of laser welding have little thermal influence, no solder joints and high welding quality.

The first conductive sheets 2 are electrically connected to the leads of the voice coil and the soldering portion, respectively. Optionally, referring to FIG. 1 and FIG. 2, the first conductive sheet 2 has a first pad and a second pad exposed outside the casing 1. The first pad is soldered to the lead of the voice coil. The second pad is soldered to the second conductive sheet 4. For example, the first pad and the second pad may be located at both ends of the first conductive sheet 2, respectively.

The inlay is structurally designed to connect the weld to the contact. In order to facilitate the electrical connection of the contact portion with the external circuit, optionally, one or more times may be bent on the inner fitting portion. When the sounding device is assembled with the electronic device, the contacts 400 on the elastic wall portion 40 can elastically contact the contact pads of the external circuit.

The second conductive sheet 4 is embedded in the positioning plastic member 3. The present disclosure does not limit the specific shape of the positioning plastic member 3, as long as the positioning plastic member 3 can be positioned and connected to the housing 1. Just together.

The internal specific structure of the sounding device can adopt the prior art. Alternatively, referring to FIG. 4, the sounding device may include a housing, a vibration system, and a magnetic circuit system. The housing 1 may include a lower case 10, a middle case 11, and an upper case 12. The first conductive sheet 2 is embedded in the middle case 11 . The positioning plastic member 3 is coupled to the middle casing 11. A escaping space for avoiding the elastic wall portion 40 may be provided on the lower case 10 or the upper case 12.

The vibration system includes the voice coil 6 and the diaphragm 5 that are joined together. The diaphragm 5 can be fixed to the middle casing 11, and the leads of the voice coil 6 are soldered to the first conductive sheet 2.

According to another embodiment of the present invention, there is also provided a method of embedding a connecting elastic piece in a sounding device. Referring to Figures 1 to 5, the method includes:

A housing 1 is disposed, a positioning plastic member 3, a first conductive sheet 2 molded into the housing 1 as an insert, and a second conductive sheet 4 molded as an insert into the positioning plastic member 3. Both ends of the second conductive sheet 4 pass through the positioning plastic member 3. A contact 400 is provided on the second conductive sheet 4.

After the second conductive sheet 4 is injection molded into the positioning plastic member 3 as an insert, the second conductive sheet 4 is bent out of one end of the outer casing 1 to form a elastic wall portion 40. . The contact 400 is located on the elastic wall portion 40. The contact 400 can be in resilient contact with the contact pads of the external circuit to achieve a reliable electrical connection.

The end of the second conductive sheet 4 away from the elastic wall portion 40 is welded to the first conductive sheet 2. The positioning plastic member 3 is attached to the casing 1. For example, the positioning plastic member 3 can be attached to the housing 1 by bonding, snapping, screwing or the like.

Optionally, a conductive first pad and a second pad may be disposed on the first conductive sheet 2. After the first conductive sheet 2 is injection molded into the housing 1 as an insert, the first and second pads are exposed outside the housing 1. One end of the second conductive sheet 4 away from the elastic wall portion 40 is welded to the second pad of the first conductive sheet 2. A lead of the voice coil 6 is soldered to the first pad.

While the invention has been described in detail with reference to the preferred embodiments of the present invention, it is understood that 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 comprising a voice coil (6), a casing (1), a positioning plastic member (3) and a connecting elastic piece, wherein the connecting elastic piece comprises a first portion embedded in the casing (1) a conductive sheet (2) and a second conductive sheet (4) embedded in the positioning plastic member (3), the first conductive sheet (2) being electrically connected to the lead of the voice coil (6),

One end of the second conductive sheet (4) passes through the positioning plastic member (3) and is welded to the first conductive sheet (2), and the other end of the second conductive sheet (4) passes through the The plastic is positioned and provided with a resilient wall portion (40), and a contact (400) is disposed on the elastic wall portion (40), and the positioning plastic member (3) is coupled to the housing (1).
The sounding device according to claim 1, characterized in that the positioning plastic member (3) is bonded to the casing (1).
The sounding device according to claim 1, characterized in that a positioning groove is arranged on the casing (1), and the positioning plastic member (3) is connected in the positioning groove.
The sounding device according to claim 3, wherein the positioning groove is provided at an intermediate position of the casing (1), and the elastic wall portion (40) is located at an intermediate position of the sounding device.
The sound emitting device according to claim 1, wherein the elastic wall portion (40) is bent and formed on a portion of the second conductive sheet (4) exposed outside the positioning plastic member (3) .
The sounding device according to claim 1, characterized in that the portion of the second conductive sheet (4) located in the positioning plastic member (3) is bent one or more times.
The sounding device according to claim 1, characterized in that the second conductive sheet (4) is laser welded to the first conductive sheet (2).
The sounding device according to claim 1, wherein the first conductive sheet (2) has a first pad and a second pad exposed outside the casing (1), the first welding The disk is soldered to the wire of the voice coil (6), and the second pad is soldered to the second conductive sheet (4).
The sounding device according to any one of claims 1-8, wherein the number of the connecting elastic pieces is two, wherein a first conductive piece (2) of the one of the connecting elastic pieces is One lead of the voice coil (6) is electrically connected, and the first conductive strip (2) of the other set of the connecting elastic pieces is electrically connected to the other lead of the voice coil (6).
A method for embedding a connecting elastic piece in a sound generating device, comprising:

Providing a housing (1), a positioning plastic member (3), a first conductive sheet (2) molded as an insert into the housing (1), and being injection molded as an insert into the positioning plastic member (3) a second conductive sheet (4), both ends of the second conductive sheet (4) pass through the positioning plastic member (3), and a contact (400) is disposed on the second conductive sheet (4) );

One end of the second conductive sheet (4) passing through the outside of the casing (1) is bent to form a elastic wall portion (40), and the contact (400) is located at the elastic wall portion (40) on;

Welding the second conductive sheet (4) away from the elastic wall portion (40) to the first conductive sheet (2) to connect the positioning plastic member (3) to the housing (1) )on.