CN210272654U

CN210272654U - Antenna structure and earphone

Info

Publication number: CN210272654U
Application number: CN201921138521.8U
Authority: CN
Inventors: 黄天才; 王丽
Original assignee: Shenzhen Horn Audio Co Ltd
Current assignee: Shenzhen Horn Audio Co Ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-07
Anticipated expiration: 2029-07-18

Abstract

The utility model provides an antenna structure and an earphone, wherein the earphone comprises a shell with an installation cavity and a sound outlet end entering the ear, the antenna structure is installed in the shell, and the antenna structure comprises an antenna, a PCB (printed circuit board) assembly and a flexible circuit board assembly; the antenna is arranged on one side of the shell far away from the sound outlet end; the PCB assembly is arranged below the antenna and comprises an upper plate and a lower plate; a clearance area is arranged on one side of the upper plate far away from the sound outlet end, and a feed point and a ground feed point are arranged in the clearance area; a reference ground of the antenna is arranged on the upper surface of the lower plate; the flexible circuit board assembly comprises a first flexible circuit board arranged between the upper plate and the lower plate, and a reference ground is electrically connected with the ground feed point through the first flexible circuit board. The technical scheme of the utility model can effectively improve the antenna performance in the earphone when realizing that the earphone is miniaturized, prevent that the earphone signal from linking absolutely.

Description

Antenna structure and earphone

Technical Field

The utility model belongs to the technical field of the earphone, especially, relate to an antenna structure and earphone.

Background

In the antenna design of the current earphone, such as a bluetooth earphone, the radiation performance of the antenna of the bluetooth earphone depends on the size of the antenna clearance area and the height of the antenna. However, since the space of the bluetooth headset itself is limited, and in addition, the diversity of the functions of the product, the headroom reserved for the antenna can become very small, and the reserved height is also very low, so that the performance of the antenna is easily affected, the antenna efficiency is low, the power is low, the sensitivity is not good, meanwhile, the disconnection of the signal between the mobile phone and the bluetooth headset and the disconnection of the left and right headsets of the true wireless bluetooth headset occur easily, and the phenomena of poor interference resistance and the like cause poor experience of the user in using the bluetooth headset.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art not enough, provide an antenna structure, its antenna efficiency who aims at solving current earphone is lower, the relatively poor problem of performance.

The utility model discloses a realize like this: an antenna structure for a headset, the headset including a housing having a mounting cavity and a sound outlet end for entry into an ear, the antenna structure being mounted within the housing, the antenna structure comprising:

the antenna is arranged on one side, far away from the sound outlet end, in the shell; and the number of the first and second groups,

the PCB assembly is arranged below the antenna and comprises an upper plate and a lower plate; a clearance area is arranged on one side of the upper plate, which is far away from the sound outlet end, and a feed point and a ground feed point are arranged in the clearance area; a reference ground of the antenna is arranged on the upper surface of the lower plate; and the number of the first and second groups,

and the flexible circuit board assembly comprises a first flexible circuit board arranged between the upper board and the lower board, and the reference ground is electrically connected with the ground feed point through the first flexible circuit board.

Optionally, the feeding point is disposed on one side of the clearance area close to the sound output end, and the ground feeding point is disposed on the other side far away from the sound output end.

Optionally, the first flexible circuit board is disposed adjacent to the tail ends of the upper board and the lower board far away from the sound output end.

Optionally, the antenna structure further comprises a mounting bracket, and the mounting bracket is disposed between the upper plate and the lower plate.

Optionally, the upper plate is parallel to the plane of the lower plate.

Optionally, the flexible circuit board assembly further includes a second flexible circuit board, and two ends of the second flexible circuit board are connected to the upper board and the lower board respectively.

Optionally, the second flexible circuit board is located on one side of the edges of the upper board and the lower board close to the sound outlet end.

The utility model discloses still provide an earphone, this earphone includes as before the antenna structure.

Optionally, the earphone further includes a bluetooth chip, a third flexible circuit board and a connecting device, all of which are installed in the installation cavity, and the bluetooth chip is installed at one side of the installation cavity adjacent to the sound outlet end and is connected with the feed point through a microstrip line;

the third flexible circuit board is provided with a touch control module comprising a touch control circuit, the lower board is provided with an ear-entering detection circuit, and the touch control circuit and the ear-entering detection circuit are electrically connected through the connecting device.

Optionally, the earphone further comprises a fourth flexible circuit board provided with a call microphone and a charging circuit, and the fourth flexible circuit board is connected with the tail end, far away from the sound output end, of the lower board.

Based on the structure design, in the technical scheme of the utility model, because the soft and hard combination mode of the upper plate, the lower plate and the first flexible circuit board is adopted to increase the PCB layout area, and the clearance area with the feed point and the ground feed point is arranged on the upper plate, the reference ground of the antenna is arranged on the lower plate, the first flexible circuit board is communicated with the ground feed point, and the like, thus, the antenna structure is convenient to assemble, and the area and the effective height of the antenna can be effectively increased in the limited space of the installation cavity, and the clearance can effectively improve the efficiency of the antenna; meanwhile, the antenna is arranged on one side, far away from the sound outlet end, of the shell, so that the influence of other electrical elements and human bodies on the performance of the antenna can be reduced. To sum up, the technical scheme of the utility model can make the antenna in the earphone have more excellent performance when realizing that the earphone is miniaturized, and then can reduce between cell-phone and the earphone to and control the disconnected continuous of signal between the earphone, greatly increased earphone experience is felt.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective structural diagram of an earphone provided in an embodiment of the present invention;

fig. 2 is a schematic diagram of a module structure of an antenna structure according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional structure diagram of an antenna structure according to an embodiment of the present invention.

The reference numbers illustrate:

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 for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The embodiment of the utility model provides an antenna structure and have this antenna structure's earphone.

Referring to fig. 1 and 3, in an embodiment, the earphone includes a housing 100 having a mounting cavity 110 and an in-ear sound outlet end 120, an antenna structure 700 mounted in the housing 100, the antenna structure 700 including an antenna (not shown), a PCB board assembly 200 and a flexible circuit board assembly; the antenna is arranged on one side of the casing 100 far away from the sound outlet end 120; the PCB assembly 200 is disposed under the antenna, and the PCB assembly 200 includes an upper plate 210 and a lower plate 220; a clearance area 211 is arranged on one side of the upper plate 210 far away from the sound outlet end 120, and a feeding point 212 and a ground feeding point 213 are arranged in the clearance area 211; a reference ground 221 of the antenna is provided on the upper surface of the lower plate 220; the flexible circuit board assembly includes a first flexible circuit board 310 disposed between the upper plate 210 and the lower plate 220, and the ground 221 is electrically connected to the ground feed point 213 through the first flexible circuit board 310.

It should be noted that the antenna structure 700 is particularly suitable for wireless headsets, such as but not limited to bluetooth headsets, and other types of headsets with suitable structures can also be suitable for the antenna structure 700. In this embodiment, taking the bluetooth headset as an example, because the existing bluetooth headset is more and more miniaturized, but the functions of the bluetooth headset are more and more, for example, most of the bluetooth headsets have functions of paddling, in-ear detection, active noise reduction, bone conduction, and the like, when the headset is designed, the area of the PCB layout is smaller, and thus the PCB board does not have enough clearance area 211 and height to meet the environmental requirements of the antenna. In other words, in the space available in the earphone, the performance improvement of the antenna will encounter a large bottleneck, i.e. there will be a conflict between the pursuit of miniaturization of the earphone and diversification of the function, and the achievement of the optimal antenna performance, and thus, two options will be involved in designing the earphone: firstly, increase the size of earphone or reduce the earphone function in order to guarantee the antenna performance, secondly reduce the miniaturization that antenna performance and experience sense satisfied the earphone size.

In the embodiment, because the upper plate 210, the lower plate 220 and the first flexible circuit board 310 are combined in a rigid-flexible manner to increase the layout area of the PCB, and the clearance area 211 with the feeding point 212 and the ground feeding point 213 is arranged on the upper plate 210, the reference ground 221 of the antenna is arranged on the lower plate 220, and the first flexible circuit board 310 is communicated with the ground feeding point 213, the structural changes are changed, so that the antenna structure 700 is convenient to assemble, and the clearance area 211 and the effective height of the antenna can be effectively increased in the limited space of the installation cavity 110, thereby effectively improving the efficiency of the antenna; meanwhile, since the antenna is disposed on a side of the casing 100 away from the sound output end 120, the influence of other electrical components and human body on the performance of the antenna can be reduced. To sum up, the technical scheme of the utility model can make the antenna in the earphone have more excellent performance when realizing that the earphone is miniaturized, and then can reduce between cell-phone and the earphone to and control the disconnected continuous of signal between the earphone, greatly increased earphone experience is felt.

Referring to fig. 2, in the present embodiment, in order to facilitate antenna radiation, the feeding point 212 is disposed on one side of the clearance region 211 (the region surrounded by the dashed line frame in fig. 2) close to the sound output end 120, and the ground feeding point 213 is disposed on the other side far from the sound output end 120. Here, the feeding point 212 and the ground feeding point 213 are two metal elastic pieces. Meanwhile, the design of leading the ground feeding point 213 to the upper plate 210 solves the problem that the lower plate 220 cannot increase the elastic sheet, and the design method does not increase the assembly difficulty of the product. Therefore, the efficiency of the antenna manufactured by the design can reach 40%, the design requirement of the product can be well met, and the antenna is higher in efficiency than the antenna of the same type of product.

Further, referring to fig. 2 and 3, in the present embodiment, the first flexible circuit board 310 is disposed adjacent to the tail ends of the upper plate 210 and the lower plate 220 far from the sound outlet end 120. Specifically, the first flexible circuit board 310 has conductive wires etched thereon, which are respectively connected to the ground feeding point 213 and the reference ground 221 on the lower board 220 to connect the ground feeding point 213 and the reference ground 221, and meanwhile, the design of the first flexible circuit board 310 near the tail end enables the first flexible circuit board 310 having a metal material to be as far away from the antenna as possible, so as to avoid adverse effects on the antenna. It should be noted that, in the embodiment, the tail portion of the lower board 220 is used as a reference point, and the FPC provided with the touch control circuit and the in-ear detection circuit and the Ground (GND) of the lower board 220 form a complete reference ground 221, which does not affect the antenna efficiency.

Further, referring to fig. 3, in the present embodiment, the antenna structure 700 further includes mounting brackets 230, the mounting brackets 230 are disposed between the upper plate 210 and the lower plate 220, and the upper plate 210 is preferably parallel to a plane of the lower plate 220. Here, the mounting bracket 230 is mainly used to support the upper plate 210 such that the upper plate 210 and the lower plate 220 are spaced apart from each other to ensure a sufficient effective height of the antenna and such that the positions of the upper plate 210 and the lower plate 220 are relatively fixed, thereby preventing the adverse effects of the movement of the plate on the performance of the antenna and the performance of the earphone. In addition, an antenna bracket 710 for conveniently fixing an antenna is further stacked above the upper plate 210.

Referring to fig. 2 and 3, in the present embodiment, the flexible circuit board assembly further includes a second flexible circuit board 320, and two ends of the second flexible circuit board 320 are respectively connected to the upper board 210 and the lower board 220. Wherein, a plurality of electronic components are arranged on the lower surface of the lower plate 220 to realize different functions of the earphone, and the integration design can effectively utilize the limited installation space to realize the multifunction of the earphone.

Further, referring to fig. 2 and fig. 3, in the present embodiment, it is preferable that the second flexible circuit board 320 is located on a side of the edges of the upper plate 210 and the lower plate 220 close to the sound outlet 120, so that the influence of the second flexible circuit board 320 on the antenna and the clearance area 211 can be avoided as much as possible, and the performance of the antenna can be further improved.

Here, the headset includes other components in addition to the antenna structure 700 as described above. Referring to fig. 1, in the present embodiment, the earphone further includes a bluetooth chip 400, a third flexible circuit board 330 and a connecting device 600 all installed in the installation cavity 110, the bluetooth chip 400 is installed at one side of the installation cavity 110 adjacent to the sound outlet 120 and is connected to the feeding point 212 through a microstrip line, wherein the microstrip line preferably has a specification of 50 ohms; the third flexible circuit board 330 is provided with a touch control module 500 including a touch control circuit, the lower board 220 is provided with an in-ear detection circuit (not shown), and the touch control circuit and the in-ear detection circuit are electrically connected through a connection device 600, wherein the touch control circuit is used for realizing a touch control function of the earphone, and the in-ear detection circuit is used for realizing an in-ear state detection function. It is understood that, in the mounting cavity 110 of the housing 100 of the earphone, the widest part of the PCB is located at the position of the ear, i.e. adjacent to the sound outlet 120, while the largest component on the PCB of the bluetooth earphone is usually the bluetooth chip 400, so that the position of the ear adjacent to the sound outlet 120 in the mounting cavity 110 is the best position for placing the bluetooth chip 400. Meanwhile, in practical use of the earphone, the human body greatly attenuates the radio frequency signal of the antenna, so that the attenuation of the antenna is smaller as the antenna is farther away from the human body, and the antenna is arranged at the tail of the installation cavity 110 far away from the sound outlet end 120 in the embodiment, namely, the antenna well follows the design away, thereby being beneficial to improving the performance of the antenna. Specifically, the connecting device 600 is specifically a BTO B connecting device, and in other embodiments, other connecting methods such as but not limited to welding or other types of connecting devices may also be adopted.

Further, referring to fig. 2 and fig. 3, in the present embodiment, the earphone further includes a fourth flexible circuit board 340 having a microphone and a charging circuit, and the fourth flexible circuit board 340 is connected to the tail end of the lower board 220 far from the sound output end 120. The charging circuit can be connected with a corresponding charging port to realize the charging function of the Bluetooth headset.

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 modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.

Claims

1. An antenna structure for a headset, the headset including a housing having a mounting cavity and a sound outlet into the ear, the antenna structure being mounted in the housing, the antenna structure comprising:

2. The antenna structure of claim 1 wherein said feed point is located on one side of said clearance region proximate said sound-emitting end and said ground feed point is located on the other side of said clearance region distal from said sound-emitting end.

3. The antenna structure of claim 2, wherein the first flexible circuit board is disposed adjacent to the tail ends of the upper and lower boards away from the sound-emitting end.

4. The antenna structure of claim 1, further comprising a mounting bracket disposed between the upper plate and the lower plate.

5. The antenna structure of claim 4, wherein the upper plate is parallel to a plane in which the lower plate lies.

6. The antenna structure according to any one of claims 1 to 5, wherein the flexible circuit board assembly further comprises a second flexible circuit board, both ends of which are connected to the upper board and the lower board, respectively.

7. The antenna structure of claim 6, wherein the second flexible circuit board is located on a side of edges of the upper and lower boards near the sound-emitting end.

8. A headset, characterized in that it comprises an antenna structure according to any one of claims 1 to 7.

9. The earphone according to claim 8, further comprising a bluetooth chip, a third flexible circuit board and a connecting device all mounted in the mounting cavity, wherein the bluetooth chip is disposed at a side of the mounting cavity adjacent to the sound outlet end and connected to the feeding point through a microstrip line;

10. The headset of claim 8, further comprising a fourth flexible circuit board having a microphone and a charging circuit, the fourth flexible circuit board being connected to a rear end of the lower plate remote from the sound output end.