WO2022126785A1

WO2022126785A1 - Loudspeaker cabinet

Info

Publication number: WO2022126785A1
Application number: PCT/CN2020/141850
Authority: WO
Inventors: 任璋; 钟志威
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2020-12-18
Filing date: 2020-12-30
Publication date: 2022-06-23
Also published as: CN112468909B; CN112468909A

Abstract

Provided is a loudspeaker cabinet. The loudspeaker cabinet comprises a shell with an accommodating space, and a sound production unit accommodated in the accommodating space and provided with a solder pad, wherein the shell is provided with a top wall, a bottom wall opposite the top wall, and side walls for connecting the top wall to the bottom wall; the top wall, the bottom wall and the side walls form the accommodating space together in an enclosing manner; the loudspeaker cabinet further comprises a soldering lug for electrically connecting the solder pad to an external circuit; the soldering lug comprises a first electric connection portion electrically connected to the solder pad, a main body portion extending from the first electric connection portion and fixed on the bottom wall by means of injection molding, and a second electric connection portion extending from the main body portion to the outside of the accommodating space and fixed on the bottom wall by means of injection molding; and the second electric connection portion is electrically connected to the external circuit.

Description

speaker box

technical field

The present invention relates to the field of sound and electricity, in particular to a speaker box used in portable electronic products.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, the functions of mobile phones are extremely diverse, one of which is the high-quality music function. Therefore, speaker boxes for playing sound are widely used in today's smart mobile devices.

The speaker box includes a housing and a sound-generating unit accommodated in the housing, and the sound-generating unit is provided with a pad for electrical connection with an external circuit. In the related art, the pad is electrically connected to an external circuit through a flexible circuit board, wherein one end of the flexible circuit board is electrically connected to the pad by hot-pressure melting tin soldering or contact, and the other end of the flexible circuit board extends out of the casing to communicate with the outside. The circuit is electrically connected. On the one hand, the piercing design of the flexible circuit board will increase the complexity of the assembly. On the other hand, it is necessary to use the injection molding joint to ensure the relative position of the pads, which will increase the breaking of the joint and the pot after injection molding. fracture.

Therefore, it is necessary to provide a new speaker box to solve the above technical problems.

technical problem

The purpose of the present invention is to provide a loudspeaker box, which not only reduces the assembly complexity, but also avoids the problem of breaking the joint and the basin frame after injection molding caused by the use of injection-molded joints to ensure the relative position of the pads. .

technical solutions

In order to achieve the above object, the present invention provides a loudspeaker box, which includes a casing with a receiving space and a sounding unit housed in the receiving space and provided with a pad, the casing has a top wall, a The bottom wall opposite the top wall and the side wall connecting the top wall and the bottom wall, the top wall, the bottom wall and the side wall together form the receiving space, the speaker box also It includes a solder pad electrically connecting the pad and the external circuit, the solder pad includes a first electrical connection part electrically connected with the pad, extends from the first electrical connection part and is injection-molded and fixed on the bottom wall and a second electrical connection portion extending from the main body portion to the outside of the accommodating space and fixed on the bottom wall by injection molding, and the second electrical connection portion is electrically connected to an external circuit.

Preferably, a first positioning hole is formed through the main body, a second positioning hole is correspondingly formed on the bottom wall, and the first positioning hole is communicated with the second positioning hole.

Preferably, the housing includes a front cover and a rear cover, the front cover includes the bottom wall and a first side wall extending from the bottom wall to the top wall, the rear cover includes the top wall and a second side wall extending from the top wall to the bottom wall, the first side wall and the second side wall are fixedly connected to form the side wall.

Preferably, the bottom wall includes a reinforcing rigid body and a plastic part that is injection-molded and fixed on the side of the reinforcing rigid body close to the top wall, and the welding piece is injection-molded and fixed to the plastic part.

Preferably, the sound-generating unit includes a diaphragm, the plastic part extends from the bottom wall to the top wall, and the plastic part includes a support part for supporting and fixing the sound-generating unit; The diaphragm, the support portion and the reinforcing rigid body together form a front cavity, and the sound guide channel communicates with the front cavity.

Preferably, the plastic part further includes a pad fixing portion extending from the support portion and a soldering tab fixing portion extending from the pad fixing portion to the outside of the receiving space, and the first electrical connection portion is fixed by injection molding In the solder pad fixing portion, the main body portion is injection-molded and fixed to the portion of the solder-tab fixing portion that is accommodated in the accommodating space, and the second electrical connecting portion is injection-fixed to the solder-fin fixing portion beyond the accommodating space. part of the space.

Preferably, the reinforcing rigid body comprises a main body and a plurality of surrounding walls extending from the main body into the plastic part, the surrounding walls enclose a conical through hole, and the conical through hole is formed by the plastic part. The conical through hole includes a first opening and a second opening, the first opening and the second opening are respectively provided at both ends of the conical through hole, and the second openings are opposite to each other. As the first opening is closer to the receiving space, the size of the tapered through hole gradually decreases along the direction from the first opening to the second opening.

Preferably, the reinforcing rigid body is made of metal material.

Preferably, the surrounding wall is stamped and formed from the body.

beneficial effect

Compared with the related art, the speaker box of the present invention replaces the traditional flexible circuit board with the pads of the sound-emitting unit by replacing the solder pads fixed by injection molding, which not only reduces the assembly complexity, but also avoids the use of injection molding to ensure The relative position of the pads causes the problem of the breakage of the continuous gear and the pot frame after injection molding.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

FIG. 1 is an exploded view of a preferred embodiment of the speaker box of the present invention.

FIG. 2 is a schematic structural diagram of a soldering piece in the speaker box shown in FIG. 1 .

FIG. 3 is a schematic structural diagram of the speaker box shown in FIG. 1 after the front cover and the solder tab are assembled.

FIG. 4 is a schematic structural diagram of the assembled speaker box shown in FIG. 1 .

FIG. 5 is a cross-sectional view of the speaker box shown in FIG. 4 along the A-A direction.

FIG. 6 is an enlarged view of part a in the speaker box shown in FIG. 5 .

FIG. 7 is a cross-sectional view of the speaker box shown in FIG. 4 along the B-B direction.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 7 , the speaker box includes a housing 1 having a accommodating space 1A and a sounding unit 3 accommodated in the accommodating space 1A and provided with pads 3A.

Wherein, the bonding pad 3A can be formed by extending the flexible circuit board of the sounding unit 3, and the flexible circuit board is used to electrically connect the external circuit and the voice coil of the sounding unit 3, or the bonding pad 3A is a A conductive sheet fixed to the basin frame of the sounding unit 3 and electrically connected to the flexible circuit board of the sounding unit 3, the voice coil of the sounding unit 3 passes through the conductive sheet and the The flexible circuit board is electrically connected with the external circuit.

The sound-generating unit 3 includes a diaphragm 31, and the diaphragm 31 divides the accommodation space 1A into a front cavity 1B and a rear cavity 1C. Wherein, the voice coil can drive the diaphragm 31 to vibrate and produce sound after being energized.

The housing 1 has a top wall 11, a bottom wall 13 opposite to the top wall 11, and a side wall 15 connecting the top wall 11 and the bottom wall 11. The top wall 11 and the bottom wall 13 and the side wall 15 together form the receiving space 1A.

As shown in FIG. 1 , the housing 1 includes a front cover 10 and a rear cover 20 . The front cover 10 includes the bottom wall 13 and a first side wall extending from the bottom wall 13 to the top wall 11 . 17. The rear cover 20 includes the top wall 11 and a second side wall 19 extending from the top wall 11 to the bottom wall 13 , the first side wall 17 and the second side wall 19 are fixed The connections form the side walls 15 .

The speaker box further includes a solder pad 5 that electrically connects the pad 3A with an external circuit. The solder pad 5 includes a first electrical connection portion 51 electrically connected to the pad 3A, and is connected from the first electrical connection. The portion 51 extends from the main body portion 53 of the bottom wall 13 and is fixed by injection molding, and the second electrical connection portion 55 extends from the main body portion 53 to the outside of the receiving space 1A and is fixed by injection molding on the bottom wall 13 . The second electrical connection portion 55 is electrically connected to an external circuit.

As shown in FIG. 1 and FIG. 3 , there are two pads 3A and two pads 5 , and the two pads are respectively a positive pad and a negative pad, and are located on the side of the sounding unit 3 . On the same side, the two welding pieces 5 are respectively a positive electrode welding piece and a negative electrode welding piece. It can be understood that, in other embodiments, grounding pads and grounding pads may also be provided.

As shown in FIG. 3 , the pad 3A is far away from the outer contour of the product (the solder pad 5 has a longer length), and the first electrical connection of the solder pad 5 cannot be guaranteed depending on the strength of the solder pad 5 itself The relative position of the part 51 and the second electrical connection part 55 in the injection mold. In this embodiment, a first positioning hole 531 is formed through the main body portion 53 , a second positioning hole 13A is correspondingly formed on the bottom wall 13 , and the first positioning hole 531 communicates with the second positioning hole 13A. . Specifically, when the soldering piece 5 is injected into the injection mold, the relative position of the soldering piece 5 in the injection mold can be ensured by inserting a positioning post into the first positioning hole 531, so as to ensure the first electrical The purpose of the relative position of the connecting portion 51 and the second electrical connecting portion 55 in the injection mold, and after injection molding, the bottom wall 13 forms the second positioning hole 13A corresponding to the position of the first positioning hole 531 .

Wherein, the bottom wall 13 can be only a plastic part, and can also be configured to include a reinforcing rigid body 131 and a plastic part 132 that is injection-molded and fixed on the side of the reinforcing rigid body 131 close to the top wall 11 , and the welding piece 5 is injection-molded. It is fixed on the plastic part 132 , so that the soldering piece 5 is injection-molded and fixed on the bottom wall 13 .

In this embodiment, the bottom wall 13 includes a reinforcing rigid body 131 and a plastic part 132 that is injection-molded and fixed on the reinforcing rigid body 131 near the top wall 11 , and the first side wall 17 is formed by the reinforcing rigid body 131 The plastic member 132 extends from the bottom wall 13 to the top wall 11 .

The reinforcing rigid body 131 includes a body 133 and a plurality of surrounding walls 134 extending from the body 133 into the plastic part 132 . The surrounding walls 134 enclose a conical through hole 135 , and the conical through hole 135 is filled with the plastic of said plastic piece 132 .

The tapered through hole 135 includes a first opening 136 and a second opening 137 , the first opening 136 and the second opening 137 are respectively provided at both ends of the tapered through hole 135 , and the second opening 137 is closer to the receiving space 1A than the first opening 136 , and the size of the tapered through hole 135 gradually decreases along the direction from the first opening 136 to the second opening 137 . The size of the tapered through hole 135 is set to gradually decrease along the direction from the first opening 136 to the second opening 137 , so that the reinforcing rigid body 131 can have a higher height after being fixed to the plastic part 132 by injection molding. connection strength.

In this embodiment, the reinforcing rigid body 131 is made of metal material. The reinforcing rigid body 131 made of metal material not only helps to strengthen the strength of the front cover 11, but also helps to dissipate heat from the speaker box. Normally, the reinforcing rigid body 131 is made of steel material.

In this embodiment, the surrounding wall 134 is formed by stamping the body 133 .

The plastic part 132 includes a support part 13B for supporting and fixing the sounding unit 3 and a sound guide channel 13C extending from the support part 13B. The diaphragm 31 , the support part 13B and the reinforcing rigid body 130 work together. The front cavity 1B is enclosed, and the sound guiding channel 13C communicates with the front cavity 1B. The sound emitted by the vibration of the diaphragm 31 is transmitted to the outside through the front cavity 1B and the sound guide channel 13C in sequence.

The plastic member 132 further includes a pad fixing portion 13D extending from the support portion 13B and a soldering tab fixing portion 13E extending from the pad fixing portion 13D to the outside of the receiving space 1A. The first electrical connection The portion 51 is injection-molded and fixed to the pad fixing portion 13D, the main body portion 53 is injection-fixed to the portion of the solder tab-fixing portion 13E that is accommodated in the accommodating space 1A, and the second electrical connection portion 55 is injection-fixed to the The solder tab fixing portion 13E extends beyond the portion of the accommodating space 1A.

The above are only the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these belong to the present invention. scope of protection.

Claims

A loudspeaker box includes a casing with a receiving space and a sounding unit housed in the receiving space and provided with a pad, the casing has a top wall, a bottom wall opposite to the top wall, and The side wall connecting the top wall and the bottom wall, the top wall, the bottom wall and the side wall together enclose the accommodation space, A solder pad for a pad and an external circuit, the solder pad includes a first electrical connection portion electrically connected to the pad, a main body portion extending from the first electrical connection portion and fixed to the bottom wall by injection molding, and a self- The main body portion extends out of the receiving space and is injection-molded and fixed on the second electrical connection portion of the bottom wall, and the second electrical connection portion is electrically connected to an external circuit.
The speaker box according to claim 1, wherein a first positioning hole is formed through the main body, a second positioning hole is correspondingly formed on the bottom wall, and the first positioning hole is connected to the second positioning hole. holes are connected.
The speaker enclosure of claim 1, wherein the housing includes a front cover and a rear cover, the front cover including the bottom wall and a first side extending from the bottom wall to the top wall The back cover includes the top wall and a second side wall extending from the top wall to the bottom wall, and the first side wall and the second side wall are fixedly connected to form the side wall.
The loudspeaker box according to any one of claims 1 to 3, wherein the bottom wall comprises a reinforcing rigid body and a plastic part that is injection-molded and fixed on a side of the reinforcing rigid body close to the top wall, and the welding piece is injection-molded. fixed to the plastic part.
The speaker box according to claim 4, wherein the sound-generating unit comprises a diaphragm, the plastic part extends from the bottom wall to the direction of the top wall, and the plastic part comprises a support for fixing the The support part of the sound generating unit and the sound guide channel extending from the support part, the diaphragm, the support part and the reinforcing rigid body together form a front cavity, and the sound guide channel communicates with the front cavity.
The speaker box according to claim 5, wherein the plastic part further comprises a pad fixing portion extending from the support portion and a soldering tab fixing extending from the pad fixing portion to the outside of the receiving space part, the first electrical connection part is injection-molded and fixed to the pad fixing part, the main body part is injection-molded and fixed to the part of the solder tab fixing part that is accommodated in the accommodation space, and the second electric connection part is injection-fixed at the portion of the solder tab fixing portion beyond the accommodating space.
The speaker box according to claim 4, wherein the reinforcing rigid body comprises a main body and a plurality of surrounding walls extending from the main body into the plastic part, the surrounding walls enclosing a conical through hole , the conical through hole is filled with the plastic of the plastic part, the conical through hole includes a first opening and a second opening, and the first opening and the second opening are respectively provided in the conical through hole At both ends of the hole, the second opening is closer to the receiving space than the first opening, and the size of the tapered through hole gradually decreases along the direction from the first opening to the second opening.
The speaker box according to claim 7, wherein the reinforcing rigid body is made of a metal material.
The speaker box according to claim 8, wherein the surrounding wall is stamped and formed by the body.