CN211208665U

CN211208665U - Antenna structure of Bluetooth headset

Info

Publication number: CN211208665U
Application number: CN201922236037.5U
Authority: CN
Inventors: 钟迎春
Original assignee: Shenzhen Jiuyuan Technology Co ltd
Current assignee: Shenzhen Jiuyuan Technology Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-08-07
Anticipated expiration: 2029-12-13

Abstract

The utility model relates to the technical field of antenna design, and discloses an antenna structure of a Bluetooth headset, wherein the antenna structure comprises a first metal layer, a second metal layer and a coating layer which are sequentially arranged from top to bottom; the first metal layer covers the second metal layer, the second metal layer is attached to the coating layer, and the coating layer is sprayed on the inner wall of the shell of the Bluetooth headset; the first metal layer is used for protecting the second metal layer from being oxidized, the second metal layer is electrically connected with a PCB (printed circuit board) in the Bluetooth headset, and the upper surface of the coating layer is provided with a circuit groove; the thickness of the first metal layer is between 2 and 4 mu m, the thickness of the second metal layer is between 8 and 12 mu m, and the thickness of the paint layer is between 20 and 25 mu m. The application provides a pair of bluetooth headset's antenna structure, the antenna structure thickness of constituteing by first metal level, second metal level and dope layer is very thin to make antenna structure's occupation space very little, practiced thrift manufacturing cost greatly.

Description

Antenna structure of Bluetooth headset

Technical Field

The utility model relates to an antenna design technical field especially relates to a bluetooth headset's antenna structure.

Background

The prior art discloses Bluetooth earphone antenna designs with various structures, including an on-board monopole antenna, an on-board inverted-F antenna, a conducting wire monopole antenna, an FPC antenna, an L DS laser etching antenna, a ceramic antenna and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bluetooth headset's antenna structure aims at solving prior art, and the structure of bluetooth headset antenna is complicated, problem that occupation space is big.

The utility model discloses a bluetooth headset's antenna structure, wherein, the antenna structure includes the first metal layer, the second metal layer and the dope layer that are arranged from top to bottom in proper order; the first metal layer covers the second metal layer, the second metal layer is attached to the coating layer, and the coating layer is sprayed on the inner wall of the shell of the Bluetooth headset; the first metal layer is used for protecting the second metal layer from being oxidized, the second metal layer is electrically connected with a PCB (printed circuit board) in the Bluetooth headset, a circuit groove is formed in the upper surface of the coating layer, a mixed layer formed by mixing metal and metal oxide is attached to the inner wall of the circuit groove, the second metal layer is provided with an opposite end face opposite to the circuit groove, a metal convex part is convexly arranged on the opposite end face, faces towards the circuit groove, and abuts against the mixed layer, and the metal convex part and the mixed layer form a conductive circuit together; the thickness of the first metal layer is between 2 and 4 mu m, the thickness of the second metal layer is between 8 and 12 mu m, and the thickness of the paint layer is between 20 and 25 mu m.

Further, the first metal layer is a nickel plating layer.

Further, the second metal layer is a copper plating layer.

Furthermore, the coating layer is formed by spraying inorganic mineral coating.

Further, the side walls of the wire groove are obliquely arranged toward the center of the wire groove in a direction from the paint layer to the first metal layer.

Further, the antenna structure is in a U shape.

Compared with the prior art, the utility model discloses mainly there is following beneficial effect:

according to the antenna structure of the Bluetooth headset, the coating layer is sprayed on the inner wall of the shell of the Bluetooth headset in a spraying mode; carving a line groove on the surface of the spraying layer by adopting a laser carving mode, wherein the coating layer contains metal and metal oxide, so that the metal and the metal oxide in the coating layer can be activated by adopting the laser carving mode and converged into the line groove to form a mixed layer; so that the second metal layer can be attached to the surface of the coating layer and combined with the mixed layer to form an internal circuit of the antenna; then covering the first metal layer on the second metal layer, wherein the first metal layer has stronger oxidation resistance and can play a role in protecting internal circuits; and finally, the second metal layer is electrically connected with the PCB in the Bluetooth headset, so that the antenna structure can transmit the received external signal to the PCB in the Bluetooth headset through an internal circuit. Compared with the prior art, the antenna structure composed of the first metal layer, the second metal layer and the coating layer is very thin, so that the occupied space of the antenna structure is very small, meanwhile, the structure is simple, the material consumption is low, and the production cost is greatly saved.

Drawings

Fig. 1 is a schematic cross-sectional view of an antenna structure of a bluetooth headset according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is an enlarged schematic view of a cross section of a line slot in a bluetooth headset according to an embodiment of the present invention;

fig. 4 is a top view of an antenna structure of a bluetooth headset according to an embodiment of the present invention.

Reference numerals: 1-antenna structure, 11-first metal layer, 12-second metal layer, 13-paint layer, 131-circuit groove, 132-mixed layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

Referring to fig. 1, fig. 1 shows a schematic cross-sectional view of an antenna structure of a bluetooth headset according to the present invention, and referring to fig. 2 and fig. 3, the antenna structure of the bluetooth headset according to the present embodiment includes a first metal layer 11, a second metal layer 12 and a coating layer 13 sequentially arranged from top to bottom; the first metal layer 11 covers the second metal layer 12, the second metal layer 12 is attached to the paint layer 13, and the paint layer 13 is sprayed on the inner wall of the shell of the Bluetooth headset; the first metal layer 11 is used for protecting the second metal layer 12 from being oxidized, the second metal layer 12 is electrically connected with a PCB (printed Circuit Board) in the Bluetooth headset, the upper surface of the coating layer 13 is provided with a circuit groove 131, the inner wall of the circuit groove 131 is attached with a mixed layer 132 formed by mixing metal and metal oxide, the second metal layer 12 is provided with an opposite end face opposite to the circuit groove 131, the opposite end face is inwards provided with a metal convex part facing the circuit groove 131, the metal convex part is abutted against the mixed layer 132, and the metal convex part and the mixed layer 132 form a conductive circuit together; the thickness of the first metal layer 11 is between 2 and 4 μm, the thickness of the second metal layer 12 is between 8 and 12 μm, and the thickness of the paint layer 13 is between 20 and 25 μm.

According to the antenna structure of the Bluetooth headset, the coating layer 13 is sprayed on the inner wall of the shell of the Bluetooth headset in a spraying mode; the line groove 131 is engraved on the surface of the spraying layer by adopting a laser engraving mode, and as the coating layer 13 contains metal and metal oxide, the metal and the metal oxide in the coating layer 13 can be activated by adopting the laser engraving mode and gathered into the line groove 131 to form a mixed layer 132; so that the second metal layer 12 can be attached to the surface of the paint layer 13 and form an internal circuit of the antenna in combination with the mixed layer 132; then, covering the first metal layer 11 on the second metal layer 12, wherein the first metal layer 11 has stronger oxidation resistance and can play a role in protecting internal circuits; finally, the second metal layer 12 is electrically connected to a PCB board in the bluetooth headset, so that the antenna structure 1 can transmit the received external signal to the PCB board in the bluetooth headset through an internal circuit. Compared with the prior art, the thickness of the antenna structure 1 consisting of the first metal layer 11, the second metal layer 12 and the coating layer 13 is very thin, so that the occupied space of the antenna structure 1 is very small, meanwhile, the structure is simple, the material consumption is low, and the production cost is greatly saved.

In some embodiments, the first metal layer 11 is a nickel plated layer. Nickel has excellent oxidation resistance, good wear resistance and corrosion resistance, and can be used as a protective material of the second metal layer 12; generally, electroless nickel plating can be used to plate a nickel layer with a thickness of 2-4 μm on the surface of the second metal layer 12.

In some embodiments, the second metal layer 12 is a copper plated layer. Copper has excellent conductive performance and can be used as a signal transmission material of the antenna structure 1; generally, electroless copper plating can be used to plate a copper layer with a thickness of 8-12 μm on the surface of the paint layer 13.

In some embodiments, the coating layer 13 is sprayed with an inorganic mineral coating. The inorganic mineral coating contains more metal oxides, and is green, environment-friendly and pollution-free.

Referring to fig. 3, in some embodiments, the sidewalls of the line groove 131 are arranged obliquely toward the center of the line groove 131 in a direction from the paint layer 13 to the first metal layer 11. By adopting the mode, the second metal layer 12 and the coating layer 13 can be combined more tightly and are not easy to fall off.

Referring to fig. 4, in some embodiments, the antenna structure 1 is "U" shaped. The adoption of the U-shaped antenna structure 1 can improve the efficiency of the antenna for receiving signals.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An antenna structure of a Bluetooth headset is characterized in that the antenna structure comprises a first metal layer, a second metal layer and a coating layer which are sequentially arranged from top to bottom; the first metal layer covers the second metal layer, the second metal layer is attached to the coating layer, and the coating layer is sprayed on the inner wall of the shell of the Bluetooth headset; the first metal layer is used for protecting the second metal layer from being oxidized, the second metal layer is electrically connected with a PCB (printed circuit board) in the Bluetooth headset, a circuit groove is formed in the upper surface of the coating layer, a mixed layer formed by mixing metal and metal oxide is attached to the inner wall of the circuit groove, the second metal layer is provided with an opposite end face opposite to the circuit groove, a metal convex part is convexly arranged on the opposite end face, faces towards the circuit groove, and abuts against the mixed layer, and the metal convex part and the mixed layer form a conductive circuit together; the thickness of the first metal layer is between 2 and 4 mu m, the thickness of the second metal layer is between 8 and 12 mu m, and the thickness of the paint layer is between 20 and 25 mu m.

2. The antenna structure of claim 1, wherein the first metal layer is a nickel plating layer.

3. The antenna structure of claim 1, wherein the second metal layer is a copper plated layer.

4. The antenna structure of claim 1, wherein the paint layer is formed by spraying inorganic mineral paint.

5. The antenna structure of a bluetooth headset according to claim 1, characterized in that the side walls of the wire groove are arranged obliquely towards the center of the wire groove in a direction from the paint layer to the first metal layer.

6. An antenna structure for a bluetooth headset according to any of claims 1-5, characterized in that the antenna structure is "U" -shaped.