CN109511021B - Production method of sound production device module and sound production device module - Google Patents

Abstract

The invention discloses a production method of a sound generating device module and the sound generating device module. The production method of the sound generating device module comprises the following steps: providing a first housing having a filling portion; the second shell with the isolation component is processed through an integral forming process, and a clamping groove is formed in the end face, away from the second shell, of the isolation component; assembling the electrical connection member passing through the filling part on the first housing; an end portion of the fixed electrical connector on the first housing; the second shell is integrally buckled on the first shell, and the clamping groove and the first shell clamp the electric connector; the inner side of the second shell, the isolation assembly and the filling part are enclosed to form a filling cavity; checking whether the first shell and the second shell are assembled in place; and after the first shell and the second shell are assembled in place, filling the sound-absorbing particles into the filling cavity.

Description

Production method of sound production device module and sound production device module

Technical Field

The invention belongs to the technical field of sound-electricity transduction, and particularly relates to a production method of a sound generating device module and the sound generating device module.

Background

The sound generating device module is an important component in an electronic product and is used for converting an electric signal into an acoustic signal. The development trend of electronic product is more and more thin, and in order to realize more functions, components and parts in the electronic product are more and more, and the space that must reserve for the sound generating mechanism module is more and more littleer, and the electronic product more and more pays attention to user's music experience, consequently requires the sound generating mechanism module to have better tone quality.

The sound generating device module is used as an electroacoustic device capable of working independently, and the sound generating device module has certain requirements on acoustic performance, such as the volume of a rear cavity meeting the requirements. Under the condition that the modules are reduced, the modules are limited by the space of the modules, the condition that electric connecting pieces need to pass through a sound absorption material filling area in the design of some modules cannot be avoided, the existing assembly method is to assemble the electric connecting pieces on a first shell, an isolation assembly is fixed on the first shell and seals and presses the electric connecting pieces to prevent material leakage, then a second shell is assembled, and the second shell is sealed with the other side of the isolation assembly. However, in the actual installation process, the electric connecting piece is not installed in place, or the electric connecting piece is welded and fixed by the end part of the laminated isolation assembly, so that the electric connecting piece is deformed to generate elasticity, the isolation assembly deviates from the preset position and is not found, and the electric connecting piece is normally assembled, so that the module generates material leakage and generates noise due to the deviation of the isolation assembly in the use process, and the user experience is influenced.

Disclosure of Invention

The invention aims to provide a new technical scheme of a production method of a sound production device module.

According to a first aspect of the present invention, there is provided a method for producing a sound generating device module, comprising the steps of:

providing a first housing having a filling portion;

the second shell with the isolation component is processed through an integral forming process, and a clamping groove is formed in the end face, away from the second shell, of the isolation component;

assembling the electrical connection member passing through the filling part on the first housing;

an end portion of the fixed electrical connector on the first housing;

the second shell is integrally buckled on the first shell, and the clamping groove and the first shell clamp the electric connector; the inner side of the second shell, the isolation assembly and the filling part are enclosed to form a filling cavity;

checking whether the first shell and the second shell are assembled in place;

and after the first shell and the second shell are assembled in place, filling the sound-absorbing particles into the filling cavity.

Optionally, the specific steps of checking whether the first housing and the second housing are assembled in place are:

checking whether the height of the assembled sound generating device module is the same as that of the standard part or not by using a correlation type photoelectric switch, and assembling the photoelectric switch in place if the photoelectric switch is not triggered;

optionally, the specific steps of checking whether the first housing and the second housing are assembled in place are:

providing a plurality of industrial cameras and picture processing devices electrically connected;

the relative positions of the industrial cameras and the sound generating device module are fixed, images of different sides of the sound generating device module are shot, the shot images are compared and judged with preset standard part images by the image processing device, and the shot images are assembled in place if the shot images are identical to the preset standard part images.

Optionally, the specific steps of checking whether the first housing and the second housing are assembled in place are:

and (4) manually and visually checking whether the joint of the first shell and the second shell after assembly is tight or not, wherein the gap is uniform.

Optionally, after confirming that the first housing and the second housing cannot be assembled in place, the method further comprises the following steps:

and (4) dismantling the second shell, adjusting the position of the electric connecting piece and re-buckling the second shell.

Optionally, the method further comprises the following steps:

gluing the position, connected with the first shell, of the isolation component or gluing the position, connected with the isolation component, of the first shell;

the specific steps of adjusting the position of the electrical connector are as follows:

and judging the offset direction of the electric connector according to the offset formed by pressing down the two sides of the clamping groove, and fixing the electric connector through the viscose after adjusting the electric connector in the opposite direction.

Optionally, the specific steps of adjusting the position of the electrical connector are:

and removing the electric connecting piece, and reassembling and fixing the end part of the electric connecting piece positioned in the module.

Optionally, the width of the card slot is greater than the width of the electrical connector.

Optionally, the method further comprises the following steps:

when the second shell is integrally formed, the side wall of the isolation component is injection-molded with a sound-transmitting piece which is communicated with two sides of the side wall of the isolation component.

According to another aspect of the invention, the invention also provides a sound-generating device module which is produced by adopting the production method.

According to one embodiment of the present disclosure, the present disclosure can improve mounting accuracy and reliability of an isolation assembly.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic illustration of the steps of some embodiments of the present invention;

FIG. 2 is a schematic representation of steps of other embodiments of the present invention;

FIG. 3 is an exploded view of a portion of some embodiments of the present invention;

FIG. 4 is a partial structural schematic of some embodiments of the present invention;

FIG. 5 is a schematic cross-sectional view A-A of FIG. 4;

FIG. 6 is a schematic cross-sectional view B-B of FIG. 4;

FIG. 7 is a schematic diagram of a partial intra-module structure according to some embodiments of the present invention;

FIG. 8 is a second housing schematic of some embodiments of the invention;

FIG. 9 is an exploded view of a second housing structure according to some embodiments of the invention;

in the figure: the shell, 11 first casings, 12 second casings, 13 filling parts, 14 containing cavities, 15 vertical walls, 16 filling cavities, 17 gaps, 18 filling holes, 19 third casings, 2 electric connectors, 3 isolating components, 31 frame bodies, 32 sound-transmitting pieces, 33 supporting columns and 34 clamping grooves.

Detailed Description

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

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

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

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The invention provides a production method of a sound generating device module, which refers to the production method of the sound generating device module in figures 1-9 and comprises the following steps:

s1, providing the first housing 11 with the filling part 13; the filling portion 13 is a component of the sound-generating device module enclosed into the filling cavity 16.

And S2, processing the second shell 12 with the isolation component 3 through an integral molding process. Referring to fig. 9, the insulation package 3 generally includes a frame 31 and a sound-transmitting member 32 sealed to the frame 31. The sound-transmitting member 32 seals the frame 31 and does not block sound from entering. The sound-transmitting member 33 may be a sound-transmitting mesh, a wire mesh, or the like, and is bonded or thermally fused to the hollow portion of the frame 31. The sound-transmitting member 33 may be perpendicular to the first housing 11 and the second housing 12, and may be sealed on the side of the frame 31.

Referring to fig. 4-8, the spacer 3 has a slot 34 formed in an end surface thereof facing away from the second housing 12. The first shell 11 and the second shell 12 may be snapped together to form the housing 1 with the receiving cavity 14. A vibration system (not shown) is provided in the accommodating chamber 14. The housing chamber 14 is divided by the barrier assembly 3 into a filling chamber 16. The accommodating chamber 14 is divided into a front chamber and a back chamber by a diaphragm of the vibration system. Generally, the larger the back volume, the better the sound effect. The filling cavity 16 is part of the rear cavity. The upper and lower surfaces of the filling cavity 16 are respectively sealed by the first shell 11 and the second shell 12, and the filling cavity 16 is communicated with the back surface of the diaphragm through the side surface, capable of transmitting sound, of the isolation component 3.

The filling cavity 16 is filled with sound-absorbing particles (not shown). The sound at the vibrating diaphragm back passes through the side that can pass through sound of isolation component 3 and transmits to filling chamber 16 in, inhales the inside abundant microporous construction of sound granule and has the absorbing action to sound, improves the improvement effect of rear chamber to sound generating mechanism module performance, under the long-pending certain circumstances of rear chamber, can play the effect of equivalent increase rear chamber volume. Because the particle diameter of the sound-absorbing particles is usually smaller, the sound-absorbing particles can interfere with a vibration system and a magnetic circuit system in the sound-generating device module after being separated from the filling cavity 16, the performance of the sound-generating device module is influenced, and noise is generated.

The housing 1 is usually made of plastic, and is light in weight and easy to process. Can be PC, PE, ABS and other plastics. Further, the isolation component 3 and the second housing 12 can be formed by an integral injection molding process using a mold.

S3, the electric connector 2 passing through the filling part 13 is assembled on the first housing 11. The electrical connector is assembled to a predetermined position. The body of the electrical connector 2 may be pre-fixed by means of glue.

S4, the fixed electrical connector 2 is located at the end of the first housing 11. The end part of the electric connecting piece 2 is fixed, and the assembling position of the electric connecting piece 2 is relatively fixed; the body of the electrical connector 2 may be pre-fixed by means of glue, and then its ends fixed; it is also possible to fix only the end portions thereof, which is not limited by the present application. The end of the electrical connector 2 inside the housing 1 is usually electrically connected to internal components such as a vibrating component and a power connection spring.

S5, the second housing 12 is integrally fastened to the first housing 11, and the card slot 34 and the first housing 11 sandwich the electrical connector 2. Referring to fig. 4-7, inside the second housing 12, the insulation assembly 3 and the filling portion 13 enclose a filling cavity 16. So that the electric connector 2 passes through the filling cavity 16 by passing through the gap between the first housing 11 and the card slot 3 and is fixed thereto by clamping. Further, in some embodiments, the electrical connector 2 may be a flexible circuit board, and the flexible circuit board is flatly laid on the first housing 11 in the filling cavity 16, so as to reduce obstruction to filling of sound absorption particles and reduce influence on the cross-sectional area of the sound transmission channel, so that sound can pass through more smoothly.

S6, checking whether the first housing 11 and the second housing 12 are assembled in place. Whether the positional relationship between the barrier assembly 3 and the electric connector 2 is fitted in place is judged by checking whether the first housing 11 and the second housing 12 are fitted in place.

The isolation component 3 and the second shell 12 are integrally formed, so that the position between the isolation component 3 and the second shell 12 is fixed, when the first shell 11 and the second shell 12 are buckled and assembled in place, the isolation component 3 is always in a preset position, and the assembly precision is high; referring to fig. 7, no additional positioning piece is needed to position the isolation assembly during assembly, so that the space occupation of the positioning piece on the cavity is saved, and the performance of the module is improved; and the sound-absorbing particles are prevented from leaking by sealing connection between the isolation component 3 and the second shell 12 during assembly, so that the assembly steps are reduced. For the size of the sound generating device module which is usually not more than 3cm multiplied by 3cm, a positioning piece is omitted, the size is saved, the assembly steps are simplified, and the assembly precision is improved.

Compared with the horizontal deviation caused by the elastic force of the separate isolation component 3, if the horizontal deviation is not found before the second shell 12 is assembled, the horizontal deviation is more difficult to find after the second shell 12 is buckled, noise is caused, and the user experience is influenced. According to the invention, even if the deformation of the electric connector 2 is caused to generate elastic force in the assembling process, the elastic force can be dispersed to the joint of the first shell 11 and the second shell 12, and the stable connection of the first shell 11 and the second shell 12 can offset the elastic force, so that the isolating component 3 has better stability after being assembled. Even if the first housing 11 and the second housing 12 are deformed due to the elastic force, the deformation can be detected more easily, and the yield of factory shipment is improved.

Or the connecting piece 2 cannot be clamped into the clamping groove 32 due to assembly errors, the end face of the isolating component 3 at the edge of the clamping groove 32 is clamped with the second shell 11, and the isolating component 3 cannot be installed in place, so that a height difference is generated, and the first shell 11 and the second shell 12 cannot be normally buckled and assembled in place. Bond and install on a framework 31 that independently exists for sound-permeable piece 32, can't block into draw-in groove 34 when electric connector 2 assembly error is great, by the framework 31 terminal surface and the first casing 11 clamp on groove 34 border, then need pull down isolation component 3 and adjust electric connector 2, frequent dismouting isolation component 3 causes the damage and leads to subsequent hourglass powder to sound-permeable piece 33 of its side easily. This application is direct in the dismouting process just can realize isolation component 3's dismouting through dismouting second casing 12, and is simple swift, and the manual work need not contact isolation component 3 to can more effective protection sound-transparent piece 33, improve the product yield.

The specific steps of checking whether the first housing 11 and the second housing 12 are assembled in place may be:

arranging a correlation photoelectric switch on a conveying line of a production line, adjusting and fixing the height of the correlation photoelectric switch through a standard part, enabling the assembled sound generating device modules to sequentially pass through a circulation tool, and assembling the correlation photoelectric switch in place if the photoelectric switch is not triggered; the photoelectric switch is triggered, assembly deviation occurs, the photoelectric switch is taken down again for checking, and the factory yield is guaranteed.

Or, a plurality of industrial cameras and picture processing devices are provided which are electrically connected; the relative positions of the industrial cameras and the sound generating device module are fixed, images of different sides of the sound generating device module are shot, the shot images are compared and judged with preset standard part images by the image processing device, and the shot images are assembled in place if the shot images are the same as the preset standard part images; and if the difference is not, the assembly deviation appears, and the assembly is taken down again for checking and checking, so that the factory yield is ensured.

Or, the joint of the first shell 11 and the second shell 12 after assembly is checked to be tight and uniform by adopting a manual visual inspection mode, and whether the assembly is in place is judged.

S7, after confirming that the first housing 11 and the second housing 12 are assembled in place, filling the sound-absorbing particles into the filling hole 18, and then sealing the filling hole 18. The filling opening 18 may be disposed on the second housing 12 or on the first housing 11, which is not limited in this application.

Alternatively, when it is confirmed that the first housing 11 and the second housing 12 cannot be assembled in place, the second housing 12 is removed, the position of the electrical connector 2 is adjusted, the second housing 2 is re-engaged for assembly, and then S6 is repeated.

The sound production device module produced by the production method provided by the invention has higher yield and reliability.

It will be understood by those skilled in the art that the above-mentioned sequence of steps is not absolute, and in some other embodiments, referring to fig. 2, the sequence may be adjusted, which is not limited in the present application.

In some embodiments, referring to fig. 2, further comprising the steps of:

glue is applied to the isolation member 3 at the position where the isolation member 3 is connected to the first housing 11, or to the first housing 11 at the position where the isolation member 3 is connected to the first housing, to improve the sealing performance of the filling chamber 16.

In some embodiments, when it is confirmed that the first housing 11 and the second housing 12 cannot be assembled in place, the specific steps of adjusting the position of the electrical connector 2 are as follows:

judging the offset direction of the electric connector 2 according to the offset printing generated by pressing the clamping groove 34 on two sides last time, if the error is small and the electric connector 2 does not need to be taken down for reassembly, adjusting the electric connector 2 in the opposite direction and fixing the electric connector by using the viscose; if the error is large and the electric connector needs to be taken down for re-assembly, the electric connector 2 is adjusted in the reverse direction according to offset printing after being taken down, fixed through adhesive and then re-fixed at the end part.

In some embodiments, the electrical connection 2 may be directly removed and reassembled, and then the second housing 12 may be snapped together, which is not limited in this application.

In some embodiments, referring to fig. 5 and 6, the width of the card slot 34 is greater than the width of the electrical connector 2. During assembly, the wider clamping groove 34 can allow a certain assembly error of the electric connector 2, and the assembly efficiency is improved. The gap between the electrical connector 2 and the card slot 34 is closed by a sealing compound (not shown). The arrangement of the sealant and the clamping groove 34 which are wider than the electric connector 2 allows a certain installation error of the electric connector, so that the one-time assembly success degree of the isolation assembly 3 is higher during installation, the assembly efficiency of the isolation assembly is improved, and meanwhile, good sealing performance can be kept. Before the first housing 11 and the second housing 12 are fastened together, a sealant may be applied to the electrical connector 2 or to the slot 34, so that the sealant can seal the gap therebetween after the first housing and the second housing are fastened together.

In some embodiments, when the second housing 12 is integrally formed, the sidewall of the isolation member 3 is injection molded with the sound-transmitting member 32, which communicates with both sides of the sidewall of the isolation member 3. The sound-transmitting piece 32 and the isolation assembly 3 are processed and manufactured through an integrated injection molding process, and compared with the sound-transmitting mesh cloth connected with the frame body 31 in a split mode, the step of later-stage connection is omitted, the sound-transmitting mesh cloth is more stable, and the problem that powder leakage is caused because the sound-transmitting mesh cloth, the metal wire mesh and the like are not firmly connected with the isolation assembly 3 can be greatly reduced.

According to another aspect of the invention, the invention also provides a sound-generating device module, which is produced by adopting the production method.

In some embodiments, the sound generating device module may further include other component housings, such as the third housing 19 shown in fig. 3-6, and in some embodiments, other housings may not be provided, which is not limited in this application.

In some embodiments, the height of the card slot 34 may be equal to the height of the electrical connector 2 to allow it to be securely clamped. Or may be slightly larger than the height of the connector 2 to provide a margin for installation, which is not limited by the present application.

In some embodiments, referring to fig. 4-6 and 9, the frame 31 is provided with support posts 33 at locations adjacent to the card slots 34. Isolation component 3's cavity makes isolation component 3's upper and lower both ends, the intensity between the both ends of being connected with first casing 11 and second casing 12 respectively promptly reduces, sets up support column 33 and can guarantee the block effect of draw-in groove 34 to electric connector 2, makes it more firm, prevents that deformation from leaking the powder.

Further, referring to fig. 9, the supporting columns 33 may be disposed at inflection points of the frame 31. Or the side frame of the insulation member 3 may be used as the supporting column 33 when the insulation member 3 is not annular in a plane parallel to the second housing 12.

In some embodiments, referring to fig. 3 and 7, the first housing 11 has a standing wall 15. The vertical wall 15 is part of the wall of the housing 1. The insulating member 3 encloses a filling cavity 16 with the upright wall 15. The housing wall on the side of the housing 1 can reduce the space in the rear chamber occupied by the frame 31 of the spacer assembly 3.

In some embodiments, referring to fig. 3 and 7, the isolation assembly 3 can be enclosed in a ring with the standing wall 15. Furthermore, in some other embodiments, the enclosure of the filling area may be provided by a sealed partition wall of some other internal functional area, besides the wall of the housing 1, which is not limited in the present application.

In some embodiments, referring to fig. 3, the standing wall 15 has a notch 17. One end of the electrical connector 2 may extend out of the housing 1 through the notch 17. The extended electrical connector is electrically connected with the processor, or/and with some other device, such as a microphone, etc., which can be configured as desired by one skilled in the art, and is not limited by the present application. And sealant is arranged between the electric connector 2 and the notch 17, so that sound absorption particles are prevented from leaking out of the shell 1, and the acoustic performance of the module is prevented from being reduced. Further, in some embodiments, the notch 17 may be understood as a slot provided on the upright wall 15, which cooperates with the second housing 12 to clamp and seal the electrical connector 2.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should 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 present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. A production method of a sound production device module is characterized by comprising the following steps:

providing a first housing having a filling portion;

the second shell with the isolation component is processed through an integral forming process, and a clamping groove is formed in the end face, away from the second shell, of the isolation component;

assembling the electrical connection member passing through the filling part on the first housing;

an end portion of the fixed electrical connector on the first housing;

the second shell is integrally buckled on the first shell, and the clamping groove and the first shell clamp the electric connector; the inner side of the second shell, the isolation component and the filling part are enclosed to form a filling cavity, and the electric connecting piece penetrates through the filling cavity in a mode of penetrating through a gap between the first shell and the clamping groove;

checking whether the first shell and the second shell are assembled in place;

and after the first shell and the second shell are assembled in place, filling the sound-absorbing particles into the filling cavity.

2. The method for producing a sound generating device module according to claim 1, wherein the step of checking whether the first housing and the second housing are assembled in place comprises the steps of:

and checking whether the height of the assembled sound generating device module is the same as that of the standard part or not by using the correlation type photoelectric switch, and assembling the correlation type photoelectric switch in place if the correlation type photoelectric switch is not triggered.

3. The method for producing a sound generating device module according to claim 1, wherein the step of checking whether the first housing and the second housing are assembled in place comprises the steps of:

providing a plurality of industrial cameras and picture processing devices electrically connected;

the relative positions of the industrial cameras and the sound generating device module are fixed, images of different sides of the sound generating device module are shot, the shot images are compared and judged with preset standard part images by the image processing device, and the shot images are assembled in place if the shot images are identical to the preset standard part images.

4. The method for producing a sound generating device module according to claim 1, wherein the step of checking whether the first housing and the second housing are assembled in place comprises the steps of:

and manually and visually inspecting whether the joint of the first shell and the second shell after assembly is tight and whether the gap is uniform.

5. The method of producing a sound generator module as defined in claim 1 wherein, after confirming that the first housing and the second housing are not properly assembled, further comprising the steps of:

and (4) dismantling the second shell, adjusting the position of the electric connecting piece and re-buckling the second shell.

6. The method of producing a sound generator module of claim 5 further comprising the steps of:

gluing the position, connected with the first shell, of the isolation component or gluing the position, connected with the isolation component, of the first shell;

the specific steps of adjusting the position of the electrical connector are as follows:

and judging the offset direction of the electric connector according to the offset formed by pressing down the two sides of the clamping groove, and fixing the electric connector through the viscose after adjusting the electric connector in the opposite direction.

7. The method for producing a sound generating device module according to claim 5, wherein the step of adjusting the position of the electrical connector comprises the steps of:

removing the electrical connector and reassembling the end of the fixed electrical connector.

8. The method of claim 1, wherein the width of the card slot is greater than the width of the electrical connector.

9. The method of producing a sound generator module of claim 1 further comprising the steps of:

when the second shell is integrally formed, the side wall of the isolation component is injection-molded with a sound-transmitting piece which is communicated with two sides of the side wall of the isolation component.

10. A sound-generating device module produced by the production method according to any one of claims 1 to 9.

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