WO2021077461A1

WO2021077461A1 - Speaker box and terminal device

Info

Publication number: WO2021077461A1
Application number: PCT/CN2019/115048
Authority: WO
Inventors: 李金明
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-10-24
Filing date: 2019-11-01
Publication date: 2021-04-29
Also published as: CN210781326U

Abstract

Provided in the present invention are a speaker box and a terminal device, the speaker box comprising an upper cover panel, a lower cover panel that forms an accommodating cavity with the upper cover panel, a sound-generating unit accommodated in the accommodating unit, and a steel piece fixed on the lower cover panel. An opening corresponding to the sound-generating unit is provided in the lower cover panel, the steel piece covers the opening, and a conductive foam is provided between the steel piece and the sound-generating unit. A grounding feed point is provided on the upper cover panel, and the speaker box further comprises a connecting piece connecting between the steel piece and the grounding feed point, the connecting piece comprising a copper foil layer and an electrically conductive adhesive layer provided on the copper foil layer, a hollow region being provided in the electrically conductive layer, and the steel piece and the copper foil layer being connected via the hollow region. The present technical solution can be used to solve the problem in the prior art of large instability in electrical resistance, and fluctuations in overall conductivity when a sound-generating unit is connected and grounded to a terminal of a complete device.

Description

Speaker box and terminal equipment

【 Technical Field 】

The utility model relates to the technical field of sound-electric conversion, in particular to a speaker box and terminal equipment.

【 Background Technology 】

With the rapid development of science and technology, people's pursuit of quality of life is getting higher and higher, and portable multimedia audio-visual equipment such as notebook computers and mobile phones are used as experience speaker boxes in daily life, and people's requirements are getting higher and higher. In the production of the speaker box, it is necessary to ground the sounding unit and the lower cover steel sheet, and the resistance value needs to be less than 2 ohms, but the ground feed point of the whole machine is on the side of the upper cover plate, so it is made of conductive copper with conductive glue The foil is attached to the steel sheet, and the tail is led from the side of the speaker box to the position of the upper cover, and it is connected to the end of the whole machine and grounded. However, the resistance of the conductive adhesive is relatively large and unstable, and the overall conductivity fluctuates due to the attachment state.

Therefore, it is necessary to provide a speaker box.

[ Technical issues ]

The purpose of the utility model is to provide a loudspeaker box and terminal equipment to solve the technical problems of large instability in resistance and fluctuations in overall conductivity in the prior art when the sound generating unit is connected to the end of the complete machine.

【 Technical Solution 】

The technical scheme of the utility model is as follows:

A speaker box comprising an upper cover plate, a lower cover plate forming a receiving cavity with the upper cover plate, a sound emitting unit contained in the receiving cavity, and a steel sheet fixed on the lower cover plate , The lower cover plate is provided with an opening corresponding to the sound emitting monomer, the steel sheet covers the opening, and a conductive foam is arranged between the steel sheet and the sound emitting monomer; the upper cover plate A ground feed point is provided on the speaker box, and the speaker box further includes a conductive sheet connected between the steel sheet and the ground feed point. The conductive sheet includes a copper foil layer and is arranged on the copper foil layer. The conductive adhesive layer is provided with a hollow area, and the steel sheet is connected to the copper foil layer through the hollow area.

Further, the steel sheet extends toward the conductive sheet to form a step corresponding to the hollow area, and the copper foil layer is provided with a groove for accommodating the step.

Further, the step is in interference connection with the copper foil layer.

Further, the step is located at the center of the steel sheet.

Further, the orthographic projection of the step and the orthographic projection of the conductive foam at least partially overlap.

Further, the conductive sheet includes a first conductive portion attached to the lower cover plate and in contact with the steel sheet, and a first conductive portion attached to the upper cover plate and connected to the ground feed point. Two conductive portions and a connecting portion connecting the first conductive portion and the second conductive portion, and the area of the first conductive portion is larger than the area of the second conductive portion.

Further, a terminal device includes a speaker box as described above.

[ Beneficial effect ]

The beneficial effect of the utility model is that conductive foam is arranged between the sounding monomer and the steel sheet, and the conductive sheet is connected between the steel sheet and the grounding feed point to realize the ground connection of the sounding monomer. The conductive sheet is made of copper. The foil layer and the conductive adhesive layer arranged on the copper foil layer are formed. A hollow area is opened in the conductive adhesive layer. The steel sheet directly contacts the copper foil layer through the hollow area. The resistance of the copper foil layer and the steel sheet is very low and stable. Direct contact through the unstable conductive adhesive layer in the middle can greatly improve the conductivity. Using this technical solution solves the technical problems of large and unstable resistance and fluctuations in overall conductivity when the sound-producing unit is connected to the end of the whole machine in the prior art.

【 Explanation of the drawings 】

Figure 1 is a schematic diagram of the overall structure of a speaker box of the utility model;

Fig. 2 is a schematic diagram of an exploded structure of the speaker box shown in Fig. 1;

FIG. 3 is a schematic diagram of the structure of the conductive sheet;

Figure 4 is a cross-sectional view in the direction of A-A in Figure 1;

Fig. 5 is a partial enlarged view of B in Fig. 4.

[ Embodiments of the present invention ]

It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present utility model will be described in detail with reference to the drawings and the embodiments.

It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for the application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "including" are used in this specification, they indicate There are features, steps, operations, devices, components, and/or combinations thereof.

Please refer to Figures 1 to 4 at the same time, where Figure 1 is a schematic diagram of the overall structure of a speaker box of the present invention; Figure 2 is a schematic diagram of the exploded structure of the speaker box shown in Figure 1; Figure 3 is a schematic diagram of the structure of the conductive sheet; 4 is a cross-sectional view in the direction of AA in FIG. 1; FIG. 5 is a partial enlarged view at B in FIG. 4.

The utility model provides a loudspeaker box. The loudspeaker box includes an upper cover plate 10, a lower cover plate 20 that forms a containing cavity with the upper cover plate 10, a sounding monomer 30 contained in the containing cavity, and a speaker box fixed on the lower cover plate 20. Steel sheet 40, the lower cover plate 20 is provided with an opening 21 corresponding to the sounding monomer 30, the steel sheet 40 covers the opening 21, and a conductive foam 50 is arranged between the steel sheet 40 and the sounding monomer 30; the upper cover plate 10 is provided There is a ground feed point. The speaker box also includes a conductive sheet 60 connected between the steel sheet 40 and the ground feed point. The conductive sheet 60 includes a copper foil layer 61 and a conductive adhesive layer 62 arranged on the copper foil layer. The layer 62 is provided with a hollow area, and the steel sheet 40 is connected to the copper foil layer 61 through the hollow area.

In this technical solution, a conductive foam 50 is provided between the sounding monomer 30 and the steel sheet 40, and the conducting sheet 60 is connected between the steel sheet 40 and the ground feed point to realize the ground connection of the sounding monomer 30. The through sheet 60 is composed of a copper foil layer 61 and a conductive adhesive layer 62 provided on the copper foil layer 61. A hollow area is provided on the conductive adhesive layer 62. The steel sheet 40 is in direct contact with the copper foil layer 61 through the hollow area, and the copper foil layer 61 and The resistance of the steel sheet 40 is very low and stable, and it skips the unstable conductive adhesive layer 62 in the middle to directly contact, which can greatly improve the conductivity. Using this technical solution solves the technical problems in the prior art that when the sounding monomer 30 is connected to the whole terminal to be grounded, the electrical resistance is relatively unstable and the overall conductivity fluctuates.

Further, the steel sheet 40 extends toward the conductive sheet 60 to form a step 41 corresponding to the hollowed-out area, and the copper foil layer 61 is provided with a groove 611 for accommodating the step 41. In this embodiment, the hollow area is arranged in a rectangular structure, and the step 41 is correspondingly arranged in a rectangular structure. The step 41 is received in the groove 611 through the hollow area to achieve sufficient and stable contact between the steel sheet 40 and the copper foil layer 61.

In this embodiment, the steel sheet 40 is extended to form a step 41 that is in full contact with the copper foil layer 61. However, it is not limited to the step 41 to achieve sufficient contact. It is also possible to add bumps corresponding to the groove 611 on the steel sheet 40. To achieve sufficient contact between the steel sheet 40 and the copper foil layer 61.

Preferably, the step 41 and the copper foil layer 61 are interference-connected, so that the steel sheet 40 and the copper foil layer 61 are fully contacted, and the overall conductivity is maintained.

Further, the step 41 is located at the center of the steel sheet 40 to ensure that the copper foil layer 61 is in contact with the entire steel sheet 40 in a balanced manner; preferably, the orthographic projection of the step 41 and the orthographic projection of the conductive foam 50 at least partially overlap. When the conductive foam 50 is used to ensure the communication between the sound-producing monomer 30 and the steel sheet 40, the steps 41 and the conductive foam 50 are arranged correspondingly to shorten the conduction path and ensure a smooth conduction path.

2, the conductive sheet 60 includes a first conductive portion 60a attached to the lower cover 20 and in contact with the steel sheet 40, and a second conductive portion 60b attached to the upper cover 10 and connected to the ground feed point. And the connecting portion 60c connecting the first conductive portion 60a and the second conductive portion 60b, the area of the first conductive portion 60a is larger than the area of the second conductive portion 60b. Adjust the area of the first conductive portion 60a and the second conductive portion 60b according to the contact between the first conductive portion 60a and the steel sheet 40 and the connection of the second conductive portion 60b with the ground feed point to ensure the contact area and conduction Performance, while saving materials and reducing costs.

The utility model also provides a terminal device (not shown), such as a mobile phone, an ipad, etc. The terminal device includes the aforementioned speaker box provided by the utility model.

It should be noted that the terms "first" and "second" in the specification and claims of the application and the above-mentioned drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

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

Claims

A speaker box comprising an upper cover plate, a lower cover plate forming a receiving cavity with the upper cover plate, a sound emitting unit contained in the receiving cavity, and a steel sheet fixed on the lower cover plate , The lower cover plate is provided with an opening corresponding to the sound emitting monomer, the steel sheet covers the opening, and a conductive foam is arranged between the steel sheet and the sound emitting monomer; the upper cover plate A ground feed point is provided on the speaker box, and the speaker box further includes a conductive sheet connected between the steel sheet and the ground feed point. The conductive sheet includes a copper foil layer and a copper foil layer disposed on the copper foil layer. The conductive adhesive layer is characterized in that the conductive adhesive layer is provided with a hollow area, and the steel sheet is connected to the copper foil layer through the hollow area.
The speaker box according to claim 1, wherein the steel sheet extends toward the conductive sheet to form a step corresponding to the hollow area, and the copper foil layer is provided with a recess for accommodating the step. groove.
The speaker box according to claim 2, wherein the step is in interference connection with the copper foil layer.
The speaker box according to claim 3, wherein the step is located at the center of the steel sheet.
The speaker box according to claim 4, wherein the orthographic projection of the step and the orthographic projection of the conductive foam at least partially overlap.
The speaker box according to claim 5, wherein the conductive sheet includes a first conductive portion attached to the lower cover plate and in contact with the steel sheet, and a first conductive portion attached to the upper cover. Board and a second conducting portion connected to the ground feed point and a connecting portion connecting the first conducting portion and the second conducting portion, the area of the first conducting portion is larger than that of the second conducting portion The area of the conducting part.
A terminal device, characterized in that the terminal device comprises the speaker box according to any one of claims 1-6.