CN209804889U - Near field wireless communication antenna - Google Patents

Abstract

The utility model provides a near field wireless communication antenna, including following subassembly: the metal layer is provided with a first connecting part, a second connecting part and a bearing surface, the first connecting part and the second connecting part are mutually spaced to form a gap, the first connecting part and the second connecting part are used for electrically connecting the signal feed-in end and the grounding end respectively, and the bearing surface extends to the second connecting part from the first connecting part; the wave absorbing layer is stacked on one side of the metal layer and is provided with a first surface and a second surface, wherein the second surface faces the bearing surface; the adhesive layer is stacked on one side of the wave absorbing layer and is provided with a binding surface, and the binding surface faces the first surface. The antenna body of the utility model is made of metal, and the width and the thickness of the antenna body are not limited, so that the antenna body can be widely applied to different electronic devices compared with a printed circuit board; the metal antenna is processed without chemical etching and has simple production process compared with printed circuit board, so that the production time is shortened effectively and the environment pollution is reduced.

Description

Near field wireless communication antenna

Technical Field

The utility model discloses a near field wireless communication antenna, especially a near field wireless communication antenna who uses the metal as the antenna body.

Background

With the growth of communication technology, near-field communication (NFC) has been widely applied to various devices, wherein the more common devices are smart phones, and notebook computers, tablet computers or smart wearable devices used with the smart phones.

Currently, most NFC antennas are made of Printed Circuit Boards (PCBs), but the PCBs have thickness and width limitations, which do not meet the trend of light weight and miniaturization of modern electronic devices. In addition, the printed circuit board requires a complicated board washing process when the product is manufactured and formed, which not only requires a long manufacturing time, but also easily causes environmental pollution.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a near field wireless communication antenna is provided to prior art not enough to improve above-mentioned problem.

The utility model discloses the technical problem that solve is realized through following technical scheme:

The utility model provides a near field wireless communication antenna, including metal level, absorbing layer and glue film. The metal layer is provided with a first connecting part, a second connecting part and a bearing surface, the first connecting part and the second connecting part are mutually spaced to form a gap, the first connecting part and the second connecting part are used for electrically connecting the signal feed-in end and the grounding end respectively, and the bearing surface extends to the second connecting part from the first connecting part. The wave absorbing layer is stacked on one side of the metal layer and is provided with a first surface and a second surface, and the second surface faces the bearing surface. The adhesive layer is stacked on one side of the wave absorbing layer and is provided with a binding surface, and the binding surface faces the first surface.

In other words, the utility model provides a near field wireless communication antenna, include: the metal layer is provided with a first connecting part, a second connecting part and a bearing surface, the first connecting part and the second connecting part are mutually spaced to form a gap, the bearing surface extends from the first connecting part to the second connecting part, the first connecting part is used for receiving a feed-in signal, and the second connecting part is used for grounding; the wave absorbing layer is stacked on one side of the metal layer and is provided with a first surface and a second surface, wherein the second surface faces the bearing surface; and the adhesive layer is stacked on one side of the wave absorbing layer and is provided with a binding surface, and the binding surface faces to the first surface.

The wave-absorbing layer further comprises an opening, and the opening is opposite to the first connecting part and the second connecting part.

The opening forms a fracture on the wave absorbing layer, and the fracture is opposite to the first connecting part and the second connecting part.

The first connecting part is electrically connected with the signal feed-in end and forms a first contact area, the second connecting part is electrically connected with the grounding end and forms a second contact area, and when the first contact area and the second contact area are positioned on the bearing surface, the first contact area and the second contact area are exposed out of the wave-absorbing layer.

The wave-absorbing layer is provided with a first side edge and a second side edge which are opposite, the opening is sunken from the first side edge to the second side edge, and a joint part is formed on the second side edge, wherein the joint part is staggered with the first joint area and the second joint area.

the near field wireless communication antenna further comprises a reinforcing plate which is combined on a surface of the metal layer different from the bearing surface, and the reinforcing plate is connected with the first connecting part and the second connecting part.

The reinforcing plate is provided with two fixing holes, the first connecting part is provided with a first positioning hole, the second connecting part is provided with a second positioning hole, wherein the first positioning hole is opposite to one of the two fixing holes, and the second positioning hole is opposite to the other fixing hole.

The gap extends along an extending direction to separate the first connecting portion and the second connecting portion, the first connecting portion and the second connecting portion further include a cable laying direction, the cable laying direction passes through a center position of the first contact area and a center position of the second contact area, and the extending direction and the cable laying direction are not parallel to each other.

The angle between the extending direction and the cable laying direction is larger than 45 degrees.

The included angle between the cable laying direction and one side edge of the wave absorbing layer is 60-90 degrees.

The binding face completely covers the first surface.

With the help of the structure, the utility model provides a near field wireless communication antenna because of the antenna body is made with the metal, and its width is all unrestricted with thickness, compares in printed circuit board, more can use the electron device in the difference widely. In addition, because the processing procedure of the metal antenna does not need to use chemical etching, and the processing procedure is simpler than that of a printed circuit board, the manufacturing time can be effectively shortened, and the technical effect of reducing environmental pollution is achieved.

the above description of the present invention and the following description of the embodiments are provided to illustrate and explain the spirit and principles of the present invention and to provide further explanation of the scope of the present invention.

Drawings

Fig. 1 is an exploded perspective view of a near field wireless communication antenna according to an embodiment of the present invention;

Fig. 2 is a top view of a near field wireless communication antenna according to an embodiment of the present invention;

Fig. 3 is a partially enlarged top view of a near field wireless communication antenna according to an embodiment of the present invention without a glue layer;

Fig. 4 is a partially enlarged top view of a nfc antenna according to another embodiment of the present invention, wherein the nfc antenna does not include an adhesive layer.

[ description of reference ]

1 near field wireless communication antenna

11 metal layer

111 first connection part

111a first locating hole

111b first contact area

111c side edge

112 second connection part

112a second positioning hole

112b second contact area

113 carrying surface

114 gap

12 wave absorbing layer

121 first surface

122 second surface

123 opening

124 of the joint

125 first side edge

126 second side

13 glue layer

131 sticking face

14 reinforcing plate

141. 142 fixed hole

C cable

S shell base

Direction of GD extension

RD cable laying direction

Detailed Description

The detailed features and advantages of the present invention are described in detail in the following embodiments, which are sufficient for those skilled in the art to understand the technical contents of the present invention and implement the present invention, and the related objects and advantages of the present invention can be easily understood by those skilled in the art according to the contents, the protection scope and the attached drawings disclosed in the present specification. The following examples are intended to illustrate the aspects of the present invention in more detail, but are not intended to limit the scope of the invention in any way.

Please refer to fig. 1 and fig. 2. Fig. 1 is an exploded perspective view of a near field wireless communication antenna 1 according to an embodiment of the present invention. Fig. 2 is a top view of the near field wireless communication antenna 1 according to an embodiment of the present invention. An embodiment of the near field wireless communication antenna 1 includes a metal layer 11, a wave-absorbing layer 12, and an adhesive layer 13, or further includes a cable C and a housing S. In addition, in another embodiment, the nfc antenna 1 further includes a stiffener 14.

As shown in fig. 1, the metal layer 11 has a first connection portion 111, a second connection portion 112 and a carrying surface 113, the first connection portion 111 and the second connection portion 112 are spaced apart from each other to form a gap 114, and the carrying surface 113 extends from the first connection portion 111 to the second connection portion 112, wherein the first connection portion 111 is used for receiving a feeding signal, and the second connection portion 112 is used for grounding. In detail, the metal layer 11 is an antenna body of the wireless communication antenna, has a wiring thereon, may be implemented in a non-closed loop shape, and is disposed on the housing S. For example, when the metal layer 11 is quadrilateral, one side of the metal layer may be provided with a first connection portion 111 and a second connection portion 112, and the first connection portion 111 and the second connection portion 112 are separated from each other by a gap 114 to form the non-closed loop. In addition, when the cable C is disposed, the first connecting portion 111 is electrically connected to the signal feeding end of the cable C to receive the feeding signal, and the second connecting portion 112 is electrically connected to the grounding network layer of the cable C to perform grounding. Therefore, the feed signal can be input into the metal layer 11 from the signal feed end of the cable C and output from the ground mesh layer after passing through the annularly extending metal layer 11. In practice, the metal layer 11 is integrally formed by pressing. In addition, the metal layer 11 may be made of copper or copper alloy, but not limited thereto. On the other hand, the thickness of the metal layer 11 can be adjusted according to practical requirements, and is not particularly limited.

The wave-absorbing layer 12 is stacked on one side of the metal layer 11 and has a first surface 121 and a second surface 122, wherein the second surface 122 faces the carrying surface 113. In short, the wave-absorbing layer 12 is required to cover the wiring path extending from the metal layer 11, so that the electrical signal in the metal layer 11 can be stably transmitted. Therefore, the wave-absorbing layer 12 may have a shape similar to that of the metal layer 11, such as a non-closed ring shape or a closed ring shape, and may cover at least the carrying surface 113 between the first connecting portion 111 and the second connecting portion 112. In practice, the wave-absorbing layer 12 may be made of ferrite (ferrite), but not limited thereto. In addition, as shown in fig. 1, the wave-absorbing layer 12 may further form an opening 123, but the detailed structure will be described later.

The adhesive layer 13 is stacked on one side of the wave-absorbing layer 12 and has a bonding surface 131, wherein the bonding surface 131 faces the first surface 121. In detail, the adhesive layer 13 may be disposed on the wave-absorbing layer 12 and on a side different from the metal layer 11, so as to protect the structures of the wave-absorbing layer 12 and the metal layer 11 and provide waterproof and antioxidant functions. In an embodiment, the adhesive surface 131 of the adhesive layer 13 completely covers the first surface 121 of the wave-absorbing layer 12, so as to completely protect the structures of the wave-absorbing layer 12 and the metal layer 11. It is worth mentioning that, compared with the antenna made of the printed circuit board, the antenna body is made of the metal (such as copper series) with better material strength and better conductive and small impedance, so that the width of the side edge of the metal layer 11 can be greatly reduced, the amount of the glue layer 13 is saved, and the manufacturing cost is effectively reduced.

The stiffener 14 is bonded to the surface of the metal layer 11 different from the bearing surface 113, and the stiffener 14 connects the first connection portion 111 and the second connection portion 112. In detail, since the gap 114 exists between the first connecting portion 111 and the second connecting portion 112, when the metal layer 11 welded to the cable C is assembled to the housing S, the first connecting portion 111 and the second connecting portion 112 may be pressed by an external assembling force to change a relative distance therebetween, thereby damaging the welded structure among the first connecting portion 111, the second connecting portion 112, and the cable C. In addition, since the cable wires C welded to the first connecting portion 111 and the second connecting portion 112 are partially exposed from the housing S, even though the welding structure among the first connecting portion 111, the second connecting portion 112, and the cable wires C has sufficient strength, the cable wires C may be pulled by a large external force during use, and the structure of the first connecting portion 111 and the second connecting portion 112 may be damaged. Therefore, by combining the reinforcing plate 14 to one side of the first connection portion 111 and the second connection portion 112, the mechanical structure thereof can be effectively reinforced, and the durability of the near field wireless communication antenna 1 can be improved. In one embodiment, the reinforcing plate 14 has two fixing holes 141 and 142, and the first connecting portion 111 has a first positioning hole 111a, and the second connecting portion 112 has a second positioning hole 112a, wherein the first positioning hole 111a is opposite to the fixing hole 141, and the second positioning hole 112a is opposite to the fixing hole 142. In short, the first positioning hole 111a, the second positioning hole 112a and the two fixing holes 141 and 142 on the reinforcing plate 14 are used to sequentially couple the first connecting portion 111 and the second connecting portion 112 of the metal layer 11 with the reinforcing plate 14 through a plurality of positioning elements, and after being coupled with each other, the metal layer is disposed on the housing S. In practice, the wave-absorbing layer 12 may also have two positioning holes opposite to the first positioning hole 111a and the second positioning hole 112a, and the positioning element may be a hot-melt column on the housing S, and after the hot-melt column sequentially passes through the two fixing holes 141 and 142 of the reinforcing plate 14, the first positioning hole 111a and the second positioning hole 112a of the metal layer 11, and the wave-absorbing layer 12, the hot-melt column is melted and then formed by heating and then cooling, so as to fasten the wave-absorbing layer 12, the metal layer 11, and the reinforcing plate 14 on the housing S, but the embodiment is not limited thereto.

Please refer to fig. 3 and fig. 4. Fig. 3 is a partially enlarged top view of the nfc antenna 1 according to an embodiment of the present invention, which does not include the adhesive layer 13. Fig. 4 is a partially enlarged top view of the near field wireless communication antenna 1 according to another embodiment of the present invention, which does not include the adhesive layer 13. As shown in fig. 3 and 4, the opening 123 of the wave-absorbing layer 12 is opposite to the first connection portion 111 and the second connection portion 112 of the metal layer 11. In detail, the opening 123 may be a C-shaped fracture formed on the wave-absorbing layer 12 (as shown in fig. 3), or may be a structure that is recessed inward from only the outer side edge of the wave-absorbing layer 12 (as shown in fig. 4).

Referring to fig. 3, in a case where the cable C is electrically connected to the first connection portion 111 and the second connection portion 112 respectively, the first connection portion 111 includes a first contact region 111b connected to the signal feed end of the cable C, and the second connection portion 112 includes a second contact region 112b connected to the ground grid layer of the cable C. In addition, the opening 123 is preferably located opposite to the first connecting portion 111 and the second connecting portion 112, and when the first contact region 111b and the second contact region 112b are located on the supporting surface 113, the opening 123 allows the first contact region 111b and the second contact region 112b to be exposed out of the wave-absorbing layer 12. With the above structure, even though the solder in the first contact region 111b and the second contact region 112b may have a relatively uneven surface compared to the carrying surface 113, the attaching state of the wave-absorbing layer 12 and the metal layer 11 is still not affected by the solder in the first contact region 111b and the second contact region 112b, so that the wave-absorbing layer 12 and the metal layer 11 have a relatively ideal degree of adhesion.

With reference to fig. 4, the opening 123 of this embodiment is recessed from the first side 125 (outer side) toward the second side 126 (inner side) of the wave-absorbing layer 12, so that a joint 124 is further formed between the opening 123 and the second side 126 of the wave-absorbing layer 12, wherein the joint 124 is offset from the first contact area 111b and the second contact area 112b, and the joint 124 may also partially cover the gap 114. In detail, the wave-absorbing layer 12 with the joint 124 can maintain a closed ring shape, and can bear a large external assembly force during the assembly process. It should be noted that, on the premise that the "first contact region 111b and the second contact region 112b are exposed to the wave-absorbing layer 12", the length, width, and shape of the opening 123 in fig. 3 and 4, and even the position of the joint portion 124 in fig. 4, can be changed according to actual requirements, and are all within the protection scope of the present invention. In addition, even if the wave-absorbing layer 12 does not have the opening 123, that is, the wave-absorbing layer 12 covers the cable lines C in the first contact area 111b and the second contact area 112b, the tightness between the metal layer 11 and the wave-absorbing layer 12 is only reduced, but the normal operation of the near field wireless communication antenna 1 is still not affected.

Please continue to refer to fig. 3. The gap 114 extends along an extending direction GD to separate the first connecting portion 111 and the second connecting portion 112, and further has a cable laying direction RD passing through a central position of the first contact region 111b and a central position of the second contact region 112b, wherein the extending direction GD and the cable laying direction RD are not parallel to each other. In detail, when the first connection portion 111 and the second connection portion 112 are two rectangles spaced apart from each other as shown in fig. 3, and the gap 114 is defined by two opposite sides of the two rectangles, the extending direction GD and the cable routing direction RD are preferably perpendicular to each other. On the other hand, as shown in fig. 4, when the first connecting portion 111 and the second connecting portion 112 are two triangles arranged at intervals, and the gap 114 is defined by two opposite oblique sides of the two triangles, the angle between the extending direction GD and the cable routing direction RD is preferably greater than 45 degrees. In addition, the first connecting portion 111 has a side 111c facing away from the gap 114, and an included angle between the cable routing direction RD and the side 111c is between 60 degrees and 90 degrees, and preferably 90 degrees.

For example, when the angle between the extending direction GD and the cable routing direction RD is greater than 45 degrees, the cable wires C on the metal layer 11 can extend in a straight line shape and be soldered to the first connecting portion 111 and the second connecting portion 112 because the first contact region 111b and the second contact region 112b have sufficient soldering area in the extending direction GD. On the contrary, when the included angle is less than 45 degrees (for example, the extending direction GD is approximately parallel to the cable laying direction RD), since the areas of the first contact region 111b and the second contact region 112b in the extending direction GD are relatively reduced, it is difficult for the cable C to extend and be welded on the first connecting portion 111 and the second connecting portion 112 in a straight line shape. That is, the cable C on the metal layer 11 must be bent in a zigzag shape, or the ground mesh layer of the cable C must be peeled off and formed in a Y shape with the signal feeding end (i.e., core wire) to be firmly welded to the first connection portion 111 and the second connection portion 112, which increases the labor cost and the manufacturing time, and also causes a weak point in structural strength. On the other hand, when the cable wires C are soldered on the metal layer 11 in a bending manner, so that an included angle is formed between the cable laying direction RD and the side 111C, the mechanical strength thereof is reduced due to the bending structure. In order to maintain the mechanical strength of the cable C within a tolerable range, the angle between the cable laying direction RD and the side 111C is between 60 and 90 degrees. On the other hand, when the angle between the cable laying direction RD and the side 111C is 90 degrees (or close to 90 degrees), the cable C has almost no bent structure, so that the best mechanical strength can be maintained.

to sum up, the utility model provides a near field wireless communication antenna because of the antenna body is made with the metal, and its width is all unrestricted with thickness, will compare in printed circuit board, more can use the electron device in the difference widely. In addition, because the processing procedure of the metal antenna does not need to use chemical etching, and the processing procedure is simpler than that of a printed circuit board, the manufacturing time can be effectively shortened, and the technical effect of reducing environmental pollution is achieved.

Claims (11)

1. a near field wireless communication antenna, comprising:

The metal layer is provided with a first connecting part, a second connecting part and a bearing surface, the first connecting part and the second connecting part are mutually spaced to form a gap, the bearing surface extends from the first connecting part to the second connecting part, the first connecting part is used for receiving a feed-in signal, and the second connecting part is used for grounding;

The wave absorbing layer is stacked on one side of the metal layer and is provided with a first surface and a second surface, wherein the second surface faces the bearing surface; and

And the adhesive layer is stacked on one side of the wave absorbing layer and is provided with a binding surface, and the binding surface faces to the first surface.

2. A nfc antenna according to claim 1, wherein the wave-absorbing layer further includes an opening, and the opening is opposite to the first connection portion and the second connection portion.

3. A nfc antenna according to claim 2, wherein the opening forms a break in the wave-absorbing layer, and the break is opposite to the first and second connection portions.

4. The nfc antenna of claim 2, wherein the first connection portion is electrically connected to the signal feed end and forms a first contact area, and the second connection portion is electrically connected to the ground end and forms a second contact area, and the first contact area and the second contact area are exposed from the wave-absorbing layer when the first contact area and the second contact area are located on the carrier surface.

5. A NFC antenna according to claim 4 wherein the absorbing layer has a first side and a second side facing away from each other, the opening being recessed from the first side towards the second side and forming a junction at the second side, wherein the junction is offset from the first and second contact areas.

6. The nfc antenna of claim 1, further comprising a stiffener bonded to a surface of the metal layer different from the carrying surface, wherein the stiffener connects the first connection portion and the second connection portion.

7. The NFC antenna of claim 6, wherein the stiffener has two fixing holes, and the first connecting portion has a first positioning hole and the second connecting portion has a second positioning hole, wherein the first positioning hole is aligned with one of the two fixing holes, and the second positioning hole is aligned with the other of the two fixing holes.

8. A nfc antenna according to claim 1, wherein the gap extends along an extending direction to separate the first connection portion and the second connection portion, and the first connection portion and the second connection portion further include a cable routing direction passing through a center of the first contact region and a center of the second contact region, wherein the extending direction and the cable routing direction are not parallel to each other.

9. A near field wireless communication antenna according to claim 8, wherein the angle between the extending direction and the cable routing direction is greater than 45 degrees.

10. A nfc antenna according to claim 9, wherein the cable routing direction is at an angle of 60 to 90 degrees with respect to a side of the wave-absorbing layer.

11. a near field wireless communication antenna according to claim 1, wherein the attachment surface completely covers the first surface.