Bluetooth Headset

Abstract

The present application provides a Bluetooth headset. The Bluetooth headset includes: an antenna radiator, a first connection part, a second connection part, and a third connection part. The lengths of the antenna radiator and the first connection part are both 1 / 4 of the wavelength corresponding to a working frequency band of the antenna radiator. The current on the antenna radiator flows from the feeding point to the bottom end of the ear handle part, and the current on the second connection part flows from the bottom end of the ear handle part to the grounding point. The feeding point is located at the top end of the ear handle part, and the grounding point is at a preset distance from the feeding point. The total length of the second connection part and the third connection part is greater than 1 / 4 of the aforementioned wavelength. The third connection part is connected to the second connection part. The parasitic current on the third connection part flows from the connection between the third connection part and the second connection part to the end of the third connection part. The current on the antenna radiator is not reversed from the parasitic current on the third connection part, so that the third connection part becomes a parasitic of the antenna radiator, thereby improving the antenna performance of the Bluetooth headset.

Description

Technical Field

[0001] The present application relates to the technical field of communication equipment, and in particular to a Bluetooth headset. Background Art

[0002] At present, Bluetooth headsets are popular among users due to their convenience and compactness, and their use is becoming more and more widespread. However, in traditional Bluetooth headsets, the antenna performance of the antenna itself is poor, and in order to meet the demand for compact layout, it is not easy to achieve the requirements of no antenna clearance area or small antenna no clearance area, resulting in the degradation of the antenna performance. Summary of the invention

[0003] The present application provides a Bluetooth headset to improve the antenna performance of the Bluetooth headset, ensure the communication effect of the Bluetooth headset, and meet the needs of areas with no antenna clearance or areas with small antenna clearance.

[0004] The present application provides a Bluetooth headset, comprising: a headset housing and a signal processing component, the headset housing has a cavity, and the signal processing component is located in the cavity. The signal processing component includes: a flexible circuit board FPC, a microphone and an antenna radiator. The headset housing includes: an earplug part and an ear handle part. The FPC is arranged on the ear handle part, and a part of the FPC extends from the top of the ear handle part to the earplug part, and the microphone is arranged at the bottom of the ear handle part. The signal end of the microphone is electrically connected to the control module on the FPC. The antenna radiator on the FPC is located on the ear handle part, and the length of the antenna radiator is 1 / 4 of the wavelength corresponding to a working frequency band of the antenna radiator. The antenna radiator is electrically connected to the control module through a feeding point on the FPC, and the feeding point is located at the top of the ear handle part. The first connecting part on the FPC is located on the earplug part, and the length of the first connecting part is 1 / 4 of the wavelength. The grounding end of the control module, the first connecting part and the grounding point on the FPC are grounded in common, and the grounding point is located on the ear handle part, and the grounding point is at a preset distance from the feeding point. The second connecting part is located on the ear handle part, and the grounding end of the microphone is electrically connected to the grounding point through the second connecting part. At least one third connection portion extends from at least one position on the second connection portion other than the grounding point, the third connection portion is located on the ear handle portion, the total length of the second connection portion and the third connection portion is greater than 1 / 4 of the wavelength, the current on the antenna radiator flows from the feeding point to the bottom end of the ear handle portion, the parasitic current on the third connection portion flows from the connection between the third connection portion and the second connection portion to the end of the third connection portion, and the current on the antenna radiator is not reversed from the parasitic current on the third connection portion.

[0005] The Bluetooth headset provided by the present application has a total length of the second connection part and the third connection part set to be greater than 1 / 4 of the wavelength corresponding to a working frequency band of the antenna radiator, and the current on the antenna radiator flows from the feeding point to the bottom of the ear handle part, the third connection part is connected to the second connection part, the current on the second connection part flows from the bottom of the ear handle part to the grounding point, and the parasitic current on the third connection part flows from the connection between the third connection part and the second connection part along the body of the third connection part to the end of the third connection part. The current on the antenna radiator is not reversed from the parasitic current on the third connection part, so that the third connection part becomes a parasitic of the antenna radiator, which improves the performance of the antenna radiator, meets the demand for compact layout of Bluetooth headsets, realizes the demand for no antenna clearance area or small antenna clearance area, and ensures good antenna performance of the antenna Bluetooth headset. In addition, the antenna radiator and the second connection part are jointly arranged on the FPC, which saves space for the Bluetooth headset, reduces the complexity of the assembly process, reduces the layout cost, and further meets the demand for compact layout of the Bluetooth headset.

[0006] In a possible design, the total length of the second connecting portion and the third connecting portion is less than or equal to 1 / 2 of the wavelength, which effectively improves the antenna performance of the Bluetooth headset.

[0007] In a possible design, the second connection portion is disposed on the FPC. Furthermore, since the antenna radiator and the second connection portion are disposed on the FPC together, compared with a traditional Bluetooth headset, the space of the ear handle of the Bluetooth headset is saved, the assembly process of the Bluetooth headset is simplified, the layout cost is reduced, and the demand for a compact layout of the Bluetooth headset is met.

[0008] In one possible design, any one of the third connecting parts includes: a connecting part extending from at least one position on the second connecting part near the bottom end of the ear handle part toward the top end of the ear handle part, thereby making full use of the space of the ear handle part and realizing a compact layout of the Bluetooth headset.

[0009] In a possible design, the parasitic current on the third connection portion is in the same direction as the current on the antenna radiator, so that the third connection portion becomes a parasitic of the antenna radiator, thereby enhancing the performance of the antenna radiator.

[0010] In one possible design, the third connecting portion and the second connecting portion form a U-shaped structure, so that the second connecting portion and the third connecting portion are both straight and parallel, saving space in the earphone housing, making the space of the Bluetooth earphone compact, and facilitating the layout of the antenna structure of the Bluetooth earphone.

[0011] In one possible design, the third connecting part is arranged on the FPC, which has a simple and easy process and saves space in the ear handle, so that the Bluetooth headset meets the demand for compact layout.

[0012] In a possible design, the third connection portion is close to the antenna radiator, ensuring that the third connection portion serves as a parasitic of the antenna radiator to improve antenna performance.

[0013] In one possible design, the third connecting portion is disposed on the inner wall or the outer wall of the ear handle, which fully utilizes the ear handle and saves space in the ear handle, so that the Bluetooth headset meets the requirement of a compact layout.

[0014] In a possible design, a projection of the third connection portion on the plane where the FPC is located in a direction perpendicular to the plane where the FPC is located has an overlapping area with the antenna radiator, so that the Bluetooth headset has good antenna performance.

[0015] In a possible design, a projection of the third connection portion on the plane where the FPC is located in a direction perpendicular to the plane where the FPC is located is close to the antenna radiator, so that the Bluetooth headset has better antenna performance.

[0016] In a possible design, a projection of the third connection portion on the plane where the FPC is located in a direction perpendicular to the plane where the FPC is located is far away from the antenna radiator and is close to the second connection portion, so that the Bluetooth headset has better antenna performance.

[0017] In one possible design, any third connecting portion includes: a curved connecting portion extending from at least one position on the second connecting portion near the bottom end of the ear handle portion toward the bottom end of the ear handle portion, thereby making full use of the space at the bottom end of the ear handle portion and realizing a compact layout of the Bluetooth headset.

[0018] In a possible design, the parasitic current on the third connection part bends from the connection with the second connection part to the end of the third connection part, so that the third connection part becomes a parasitic of the antenna radiator, thereby enhancing the performance of the antenna radiator.

[0019] In one possible design, any one of the third connection portions includes: a connection portion extending from at least one position on the second connection portion close to the bottom end of the ear handle portion toward the top end of the ear handle portion, and a curved connection portion extending from at least one position on the second connection portion close to the bottom end of the ear handle portion toward the bottom end of the ear handle portion.

[0020] In one possible design, any third connecting part includes: a metal outer wall of a battery, and a connecting part connecting the metal outer wall of the battery to at least one position on the second connecting part near the bottom end of the ear handle part, thereby making full use of the space occupied by the battery, saving space in the ear handle part, and realizing a compact layout of the Bluetooth headset.

[0021] In one possible design, any one of the third connection parts includes: a connection part extending from at least one position on the second connection part near the bottom end of the ear handle part toward the top end of the ear handle part, a metal outer wall of the battery, and a connection part connecting the metal outer wall of the battery to at least one position on the second connection part near the bottom end of the ear handle part.

[0022] In one possible design, any third connection portion includes: a curved connection portion extending from at least one position on the second connection portion near the bottom end of the ear handle portion toward the bottom end of the ear handle portion, a metal outer wall of the battery, and a connection portion connecting the metal outer wall of the battery to at least one position on the second connection portion near the bottom end of the ear handle portion.

[0023] In one possible design, any one of the third connection parts includes: a connection part extending from at least one position on the second connection part near the bottom end of the ear handle part toward the top end of the ear handle part, a curved connection part extending from at least one position on the second connection part near the bottom end of the ear handle part toward the bottom end of the ear handle part, a metal outer wall of the battery, and a connection part connecting the metal outer wall of the battery to at least one position on the second connection part near the bottom end of the ear handle part.

[0024] In a possible design, the signal processing component includes: a speaker and a battery. The speaker is arranged in the earplug part, and the control module on the FPC is electrically connected to the speaker. The battery is arranged in the ear handle part, and the battery supplies power to the Bluetooth headset. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a Bluetooth headset;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the signal processing component in the Bluetooth headset shown;

[0027] Figure 3 A schematic diagram of the structure of a Bluetooth headset provided in one embodiment of the present application;

[0028] Figure 4 An exploded schematic diagram of a Bluetooth headset provided in one embodiment of the present application;

[0029] Figure 5 A schematic diagram of the structure of a signal processing component in a Bluetooth headset provided in an embodiment of the present application;

[0030] Figure 6a A schematic diagram of the position of the third connecting portion in a Bluetooth headset provided in an embodiment of the present application;

[0031] Figure 6bA schematic diagram of the position of the third connecting portion in a Bluetooth headset provided in an embodiment of the present application;

[0032] Figure 7 A schematic diagram of a reflection coefficient S11 curve of an antenna structure in a Bluetooth headset provided in an embodiment of the present application;

[0033] Figure 8 A schematic diagram of a coefficient efficiency curve of an antenna architecture in a Bluetooth headset provided in an embodiment of the present application;

[0034] Figure 9a A schematic diagram of the position of the third connecting portion in a Bluetooth headset provided in an embodiment of the present application;

[0035] Figure 9b A schematic diagram of the position of the third connecting portion in a Bluetooth headset provided in an embodiment of the present application;

[0036] Fig.9c A schematic diagram of the position of the third connecting portion in a Bluetooth headset provided in an embodiment of the present application;

[0037] Fig.10 A schematic diagram of a reflection coefficient S11 curve of an antenna structure in a Bluetooth headset provided in an embodiment of the present application;

[0038] Fig.11 A schematic diagram of a coefficient efficiency curve of an antenna architecture in a Bluetooth headset provided in an embodiment of the present application;

[0039] Fig.12 A schematic diagram of the positional relationship between the projection of the third connecting portion of the Bluetooth headset along the vertical direction of the plane where the FPC is located and the antenna radiator in an embodiment of the present application;

[0040] Fig.13 A schematic diagram of the positional relationship between the projection of the third connecting portion of the Bluetooth headset along the vertical direction of the plane where the FPC is located and the antenna radiator in an embodiment of the present application;

[0041] Fig.14 A schematic diagram of the positional relationship between the projection of the third connecting portion of the Bluetooth headset along the vertical direction of the plane where the FPC is located and the antenna radiator in an embodiment of the present application;

[0042] Fig.15 A schematic diagram of the positional relationship between the projection of the third connecting portion of the Bluetooth headset along the vertical direction of the plane where the FPC is located and the antenna radiator in an embodiment of the present application;

[0043] Fig.16A schematic diagram of the positional relationship between the projection of the third connecting portion of the Bluetooth headset along the vertical direction of the plane where the FPC is located and the antenna radiator in an embodiment of the present application;

[0044] Fig.17a A schematic diagram of the position of the third connecting portion in a Bluetooth headset provided in an embodiment of the present application;

[0045] Fig.17b A schematic diagram of the position of the third connecting portion in a Bluetooth headset provided in an embodiment of the present application;

[0046] Fig.18 A schematic diagram of the position of the third connecting portion in a Bluetooth headset provided in an embodiment of the present application;

[0047] Fig.19 A schematic diagram of a reflection coefficient S11 curve of an antenna structure in a Bluetooth headset provided in an embodiment of the present application;

[0048] Fig. 20 A schematic diagram of a coefficient efficiency curve of an antenna architecture in a Bluetooth headset provided in an embodiment of the present application;

[0049] Fig.21 A schematic diagram of the directions of the current on the second connection part, the current on the antenna radiator and the parasitic current on the third connection part in a Bluetooth headset provided in an embodiment of the present application;

[0050] Fig.22a A schematic diagram of the distribution of current on a signal processing component in a Bluetooth headset provided in an embodiment of the present application;

[0051] Figure 22b A schematic diagram of the distribution of current on a signal processing component in a Bluetooth headset provided in an embodiment of the present application;

[0052] Fig.22c A schematic diagram of the distribution of current on a signal processing component in a Bluetooth headset provided in an embodiment of the present application;

[0053] Fig.23 A schematic diagram of a reflection coefficient S11 curve of an antenna structure in a Bluetooth headset provided in an embodiment of the present application and an antenna structure in a traditional Bluetooth headset;

[0054] Fig.24 A schematic diagram of coefficient efficiency curves of the antenna architecture in a Bluetooth headset provided in an embodiment of the present application and the antenna architecture in a traditional Bluetooth headset. DETAILED DESCRIPTION

[0055] Figure 1 A schematic diagram of the structure of a Bluetooth headset is shown. Figure 2 Shows Figure 1The structure diagram of the signal processing component 202 in the Bluetooth headset 200 is shown. Figure 1 and Figure 2 As shown, the Bluetooth headset 200 includes: an earphone housing 201 and a signal processing component 202. The earphone housing 201 has a cavity, and the signal processing component 202 is located in the cavity. The earphone housing 201 includes: an earplug part 2011 and an ear handle part 2012.

[0056] like Figure 2 As shown, the signal processing component 202 includes: a microphone 2021, a flexible printed circuit (FPC) 2022 and a battery 2023. Among them, a part of the FPC 2022 is arranged on the ear handle part 2012 and extends longitudinally, and is close to the battery. The remaining part of the FPC 2022 is arranged on the ear plug part 2011. The microphone 2021 is arranged at the bottom end of the ear handle part 2012, and the ground wire 20243 on the FPC 2022 arranged on the ear handle part 2012 extends to the bottom end of the ear handle part 2012 to achieve electrical connection with the ground end of the microphone 2021, thereby ensuring that the microphone 2021 can work normally. The current on the ground wire 20243 on the FPC 2022 of the ear handle part flows from the top of the ear handle part 2012 to the ground point on the FPC 2022. The battery 2023 is arranged on the ear handle part 2012, and the battery 2023 supplies power to the microphone 2021.

[0057] like Figure 2 As shown, the signal processing component 202 also includes: an antenna structure of the Bluetooth headset 200, which usually adopts an inverted-F antenna (IFA), and the antenna structure includes: a strip-shaped antenna radiator 20241 and a transmission axis (cable) 20242 connected to one end of the antenna radiator 20241. The antenna radiator 20241 is located in the ear handle part 2012, extends longitudinally, and is close to the battery 2023. The current on the antenna radiator 20241 flows from the connection point with the transmission axis 20242 (i.e., the feeding point a1) to the bottom end of the ear handle part 2012. The transmission axis 20242 extends from the top of the ear handle part 2012 to the earplug part 2011, and the transmission axis 20242 is used to transmit radio frequency signals.

[0058] The antenna radiator 20241 is usually parallel to and equal in length to the ground line 20243 on the FPC 2022 of the ear handle 2012. At this time, the current on the antenna radiator 20241 and the current on the ground line 20243 on the FPC 2022 of the ear handle 2012 are equal in magnitude and opposite in phase, resulting in the current on the ground line 20243 on the FPC 2022 of the ear handle 2012 offsetting the current on the antenna radiator 20241, so that the IFA cannot radiate, causing the Bluetooth headset 200 to fail to work. In addition, the cost of independently setting up the IFA is high.

[0059] based on Figure 1 and Figure 2 The structure of the Bluetooth headset 200 is shown as Figure 2 As shown, in addition to the aforementioned antenna structure, the Bluetooth headset 200 can also use a ceramic antenna, which can usually be arranged at the top AA of the ear handle 3012. Since the ceramic antenna itself requires a large antenna clearance area, the Bluetooth headset 200 cannot meet the demand for compact layout, and it is not easy to achieve the demand for no antenna clearance area or a small antenna clearance area, and the antenna performance is reduced due to insufficient antenna clearance area.

[0060] In order to solve the above problems, the present application provides a Bluetooth headset that can achieve the compact layout demand of the Bluetooth headset, has the characteristics of low cost and space saving, and can also achieve the requirement of no antenna clearance area or small antenna clearance area, thereby improving the antenna performance of the Bluetooth headset.

[0061] The technical solution of the Bluetooth headset of the present application is described below in conjunction with the drawings in the embodiments of the present application.

[0062] Figure 3 FIG. 1 is a schematic diagram showing the structure of a Bluetooth headset provided by an embodiment of the present application. Figure 3 As shown, the Bluetooth headset 100 of the present application may include: an earphone housing 1 and a signal processing component 2. The earphone housing 1 has a cavity, and the signal processing component 2 is located in the cavity. The earphone housing 1 is used to fix and protect the signal processing component 2.

[0063] The earphone housing 1 includes an earplug portion 11 and an ear handle portion 12. The earplug portion 11 is used to partially embed into the user's ear. The ear handle portion 12 is used to facilitate the user to hold it for wearing and to facilitate the user to touch it for realizing corresponding functions. When the user wears the Bluetooth headset 100, part of the earplug portion 11 is embedded in the user's ear, and the ear handle portion 12 is located outside the user's ear.

[0064] It should be noted that, in addition to Figure 3In the above description, the connecting portion between the earplug portion 11 and the ear handle portion 12 is used as the division of the ear handle portion 12. In the present application, the connecting portion between the earplug portion 11 and the ear handle portion 12 can also be used as the earplug portion 11 to realize the division of the earplug portion 11 and the ear handle portion 12.

[0065] Among them, the earphone shell 1 can be formed in one piece to avoid damage or loss of parts in the Bluetooth headset 100 due to accidental falling. It can also be detachably connected by multiple parts, such as snap-fit ​​connection or threaded connection, so as to facilitate subsequent repair or maintenance of the Bluetooth headset 100. It can also be non-detachably connected by multiple parts, such as gluing, to reduce the risk of accidental falling off, thereby making the Bluetooth headset 100 more reliable.

[0066] For the sake of explanation, Figure 3 , an example is given to illustrate that the earphone housing includes multiple parts.

[0067] like Figure 3 As shown, the earphone housing 1 may include three parts: a main shell A, a bottom shell B and a side shell C. Part of the main shell A is located at the ear handle portion 12 of the Bluetooth headset 100, and the other part of the main shell A is located at the earplug portion 11 of the Bluetooth headset 100. The main shell A forms a first opening at the bottom end of the ear handle portion 12 of the Bluetooth headset 100, and forms a second opening at the earplug portion 11 of the Bluetooth headset 100. The signal processing component 2 can be loaded into the interior of the main shell A from the first opening or the second opening. The bottom shell B is located at the bottom end of the ear handle portion 12 of the Bluetooth headset 100 and is fixedly connected to the main shell A, and the bottom shell B is installed at the first opening. The side shell C is located at the earplug portion 11 of the Bluetooth headset 100 and is fixedly connected to the main shell A, and the side shell C is installed at the second opening.

[0068] Among them, the present application can use a detachable connection or a non-detachable connection to realize the connection between the main shell A and the bottom shell B and the connection between the side shell C and the main shell A, and the present application does not limit this.

[0069] In addition, the side housing C is provided with one or more sound outlet holes D ( Figure 3 The two sound holes are used as an example to illustrate the structure of the earphone housing 1, so that the sound inside the earphone housing 1 can be transmitted to the outside of the earphone housing 1 through the sound holes D. The shape, position and number of the sound holes D are not limited in this application. Figure 3 In the figure, two circular sound holes D are taken as an example for illustration.

[0070] Figure 4 Shows Figure 3 The exploded schematic diagram of the Bluetooth headset 100 is shown. Figure 5 Shows Figure 3 The structure diagram of the signal processing component 2 in the Bluetooth headset 100 is shown. Figure 4 and Figure 5 As shown, the signal processing component 2 may include: a flexible circuit board FPC21, a microphone 22, an antenna radiator 23, a control module 24, a first connecting portion 25 ( Figure 4 and Figure 5 ), a second connection portion 26 and a third connection portion 27.

[0071] The FPC 21 is disposed on the ear handle portion 12, and part of the FPC 21 extends along the top of the ear handle portion 12 to the earplug portion 11. In other words, the FPC 21 extends from the bottom end of the ear handle portion 12 through the top of the ear handle portion 12 to the earplug portion 11. The FPC 21 can form one or more bending structures on the earplug portion 11 and the ear handle portion 12. For example, the earphone housing 1 can adopt a "" structure. The FPC 21 is used to place or fix components in the Bluetooth headset 100.

[0072] The control module 24 can be fixed on the FPC 21 by welding or gluing. The control module 24 is used to process radio frequency signals. The present application does not limit the specific implementation form of the control module 24. For example, the control module 24 can be a system on chip (SOC). Generally, the control module 24 may include: a radio frequency (RF) circuit, which is used to modulate or demodulate radio frequency signals. In addition, the present application does not limit the location of the control module 24. Optionally, the control module 24 is located in the earplug portion 11.

[0073] The microphone 22 is disposed at the bottom of the ear handle 12. The present application does not limit the type and quantity of the microphone 22. When the user wears the Bluetooth headset 100, the microphone 22 can receive the user's voice signal, and the signal end of the microphone 22 can convert the voice signal into an electrical signal and transmit it to the control module 24 through an electrical connection with the control module 24, so that the control module 24 processes the electrical signal into a radio frequency signal, so that the microphone 22 can work normally.

[0074] In order to conveniently obtain the user's voice signal, the microphone 22 can be optionally arranged on a side of the FPC 21 away from the ear handle 12, which helps the microphone 22 to obtain the voice signal from the outside of the Bluetooth headset 100. In addition, the microphone 22 can be installed on the FPC 21 using a fixing member so that the microphone 22 is coupled to the control module 24.

[0075] In addition, continue to combine Figure 4 and Figure 5 In the present application, the signal processing component 2 may further include: a speaker 28 and a battery 29 .

[0076] The speaker 28 is disposed in the earplug portion 11. The present application does not limit the type, quantity, and position of the speaker 28. When the user wears the Bluetooth headset 100, the earpiece can receive the electrical signal sent by the control module 24 through the electrical connection with the control module 24. The earpiece then converts the electrical signal into a sound signal and outputs it to the outside of the Bluetooth headset 100, so that the earpiece can work normally.

[0077] In order to facilitate the user to hear the sound signal clearly, optionally, the speaker 28 can be arranged on the side of the FPC 21 away from the earplug part 11, which helps the sound signal formed by the earpiece to be transmitted to the outside of the Bluetooth headset 100. In addition, the speaker 28 can be installed on the FPC 21 using a fixing member so that the speaker 28 is coupled to the control module 24.

[0078] The battery 26 is arranged in the ear handle portion 12. The present application does not limit the type, quantity, shape and position of the battery 29. Optionally, the battery 29 can be in a strip shape to be better accommodated inside the earphone housing 1. The power supply end of the battery 29 is electrically connected to the power supply end of the control module 24, the power supply end of the speaker 28 and the power supply end of the microphone 22, so that the battery 29 provides power to the Bluetooth headset 100. In addition, the power supply end of the battery 29 can be located at the top end of the ear handle portion 12, or at the bottom end of the ear handle portion 12, and the present application does not limit this. For ease of explanation, Figure 4 and Figure 5 In the figure, a strip-shaped battery 29 is taken as an example, and the power supply end of the battery 29 is at the top of the ear handle 12.

[0079] The antenna structure of the Bluetooth headset 100 of the present application may include: an antenna radiator 23, a first connection portion 25, a second connection portion 26 and a third connection portion 27. Optionally, the type of the antenna structure of the Bluetooth headset 100 of the present application may include: any one of a single-pole antenna, an inverted-F antenna IFA and a planar inverted-F antenna (PIFA). It should be noted that when the type of the antenna structure of the Bluetooth headset 100 of the present application is PIFA, the antenna radiator 23 also needs to be connected to the second connection portion 26.

[0080] The antenna radiator 23 can be disposed on the FPC 21 by insert molding, metal coating, flexible circuit board (ie, steel sheet) or laser direct structuring (LDS) and the like, and the antenna radiator 23 is located at the ear handle 12. The present application does not limit the type of the antenna radiator 23.

[0081] The length of the antenna radiator 23 is 1 / 4 of the wavelength corresponding to one working frequency band of the antenna radiator 23. Since the antenna radiator 23 can communicate normally in one working frequency band or multiple working frequency bands, the present application can select any working frequency band from the working frequency bands when the antenna radiator 23 communicates normally, and select any frequency point in the working frequency band, substitute the frequency point into the formula c=f*λ, and calculate the wavelength. Among them, f is the frequency point, the unit is Hertz (Hz). λ is the wavelength, the unit is meter (m). c is the speed of light, c=3×10^8 meters / Hertz (m / Hz). Therefore, the present application can set the length of the antenna radiator 23 to 1 / 4 of the wavelength.

[0082] It should be noted that, affected by the medium around the path, usually, the actual physical length of the first connecting portion 25 is shorter than 1 / 4 of the aforementioned wavelength, and the actual physical length of the antenna radiator 23 is shorter than 1 / 4 of the aforementioned wavelength.

[0083] The antenna radiator 23 is electrically connected to the control module 24 through the feeding point a on the FPC 21, and can receive the radio frequency signal sent by the control module 24 so as to radiate the radio frequency signal through the antenna radiator 23. It can also send radio frequency signals to the control module 24 so that the control module 24 processes the video signal so that the antenna radiator 23 can communicate normally. Those skilled in the art will understand that the feeding point a is the connection point where the antenna radiator 23 and the feeder line transmit energy to each other. Generally, the feeding point a can be welded to the FPC 21 using metal such as copper sheet. Among them, the present application does not limit the position of the feeding point a. Optionally, the feeding point a is located at the ear handle 12.

[0084] The first connection part 25 can be arranged on the FPC 21 by using in-mold injection molding, metal coating, flexible circuit board (i.e., steel sheet) or LDS manufacturing processes, and the first connection part 25 is located on the earplug part 11. Among them, the present application does not limit the position and shape of the first connection part 25. The first connection part 25 is the main ground of the Bluetooth headset 100, and the grounding terminal of the control module 24, the first connection part 25 and the grounding point b on the FPC 21 are shared. And the length of the first connection part 25 is 1 / 4 of the aforementioned wavelength, which is used to constitute the radiator of the antenna radiator 23, so that the total length of the antenna radiator 23 and the first ground wire together meet the requirement of 1 / 2 wavelength, thereby realizing the communication process of the Bluetooth headset 100.

[0085] The grounding point b is located at the ear handle 12, and the grounding point b is at a preset distance from the feeding point a. The preset distance can be set according to the design rules of the antenna, and this application does not limit this. The location of the docking point b in this application is not limited. Optionally, the grounding point b is located at the ear handle 12. For ease of explanation, Figure 5 In the figure, the grounding point b is located outside the feeding point a as an example.

[0086] The second connection part 26 can be set by in-mold injection molding, metal coating, flexible circuit board (i.e., steel sheet) or LDS manufacturing process, and the second connection part 26 is located at the ear handle part 12. Among them, the present application does not limit the position and shape of the second connection part 26. Since the grounding point b, the first connection part 25 and the grounding end of the control module 24 are in common ground, the grounding end of the microphone 22 is electrically connected to the grounding point b through the second connection part 26. Therefore, in the Bluetooth headset 100 of the present application, the microphone 22 and the control module 24 can be connected to a common ground to minimize the common ground interference.

[0087] Optionally, the second connecting portion 26 can be arranged on the FPC 21. Furthermore, since the antenna radiator 23 and the second connecting portion 26 are jointly arranged on the FPC 21, compared with the traditional Bluetooth headset 200, the space of the middle ear handle of the Bluetooth headset 100 is saved, and the assembly process of the Bluetooth headset 100 is simplified, the layout cost is reduced, and the demand for a compact layout of the Bluetooth headset 100 is met.

[0088] One or more third connection parts 27 extend from at least one position on the second connection part 26 except the grounding point b, and the third connection part 27 is located at the ear handle part 12. That is to say, for any position on the second connection part 26 except the grounding point b, the number of the extended third connection parts 27 can be one or more, and this application does not limit this. For the convenience of explanation, Figure 5 The third connection portion 27 is illustrated by taking the connection portion 271 , the connection portion 272 and the connection portion 273 as an example.

[0089] In the present application, the third connecting portion 27 can be manufactured by in-mold injection molding, metal coating, flexible circuit board (i.e., steel sheet) or LDS. In this application, the position and shape of the third connecting portion 27 are not limited. And the total length of the second connecting portion 26 and the third connecting portion 27 is greater than 1 / 4 of the aforementioned wavelength. In this application, the length of each of the second connecting portion 26 and the third connecting portion 27 is not limited.

[0090] To further improve antenna performance, optionally, the total length of the second connection portion 26 and the third connection portion 27 is greater than 1 / 4 of the aforementioned wavelength and less than or equal to 1 / 2 of the aforementioned wavelength. In addition, to further meet the demand for a compact layout of the Bluetooth headset 100, optionally, the second connection portion 26, the third connection portion 27 and the antenna radiator 23 can be parallel and of equal length.

[0091] In the present application, the current on the second connection part 26 flows from the bottom of the ear handle part 12 to the grounding point b, and the current on the antenna radiator 23 flows from the feeding point a to the bottom of the ear handle part 12, so that the current on the second connection part 26 will offset the current on the antenna radiator 23. The third connection part 27 is connected to the second connection part 26, and the total length of the second connection part 26 and the third connection part 27 is greater than 1 / 4 of the aforementioned wavelength, and the parasitic current on the third connection part 27 flows from the connection between the third connection part 27 and the second connection part 26 to the end of the third connection part 27. The current on the antenna radiator 23 is not reversed from the parasitic current on the third connection part 27, so that the parasitic current on the third connection part 27 will not offset the current on the antenna radiator 23, but will enhance the current on the antenna radiator 23, so that the third connection part 27 becomes a parasitic of the antenna radiator 23, effectively improving the antenna performance of the Bluetooth headset 100 and ensuring the communication effect of the Bluetooth headset 100.

[0092] There are many forms of implementation that the current on the antenna radiator 23 and the parasitic current on the third connection portion 27 are not reversed. For example, the parasitic current on the third connection portion 27 may be in the same direction as the current on the antenna radiator 23, or the direction of the parasitic current on the third connection portion 27 may form an acute angle with the direction of the current on the antenna radiator 23, or the parasitic current on the third connection portion 27 may bend from the connection between the third connection portion 27 and the second connection portion 26 to the end of the third connection portion 27.

[0093] The Bluetooth headset provided by the present application is configured such that the total length of the second connection part and the third connection part is greater than 1 / 4 of the wavelength corresponding to a working frequency band of the antenna radiator, and the current on the antenna radiator flows from the feeding point to the bottom of the ear handle part, the third connection part is connected to the second connection part, the current on the second connection part flows from the bottom of the ear handle part to the grounding point, the parasitic current on the third connection part flows from the connection between the third connection part and the second connection part along the body of the third connection part to the end of the third connection part, and the current on the antenna radiator is not reversed from the parasitic current on the third connection part, so that the third connection part becomes a parasitic of the antenna radiator, improves the performance of the antenna radiator, meets the demand for compact layout of Bluetooth headsets, realizes the demand for no antenna clearance area or small antenna clearance area, and ensures good antenna performance of the antenna Bluetooth headset. In addition, the antenna radiator and the second connection part are jointly arranged on the FPC, which saves space for the Bluetooth headset, reduces the complexity of the assembly process, reduces the layout cost, and further meets the demand for compact layout of the Bluetooth headset.

[0094] In the above Figure 3-Figure 5Based on the illustrated embodiment, the implementation of any third connection portion 27 in the present application may include multiple ways. In the following, the specific structure of any third connection portion 27 is described in detail using Embodiment 1, Embodiment 2 and Embodiment 3.

[0095] Embodiment 1

[0096] In Embodiment 1, any third connection portion 27 may include: a connection portion extending from one or more positions on the second connection portion 26 close to the bottom end of the ear handle portion 12 toward the top end of the ear handle portion 12, thereby making full use of the space of the ear handle portion 12 and realizing a compact layout of the Bluetooth headset 100.

[0097] Among them, the present application does not limit the shape of the third connection part 27, the number of the third connection parts 27, the connection position of the third connection part 27 and the second connection part 26, and the angle between the third connection part 27 and the second connection part 26. It is only necessary to satisfy that the total length of the second connection part 26 and the third connection part 27 is greater than 1 / 4 of the aforementioned wavelength and the current on the antenna radiator 23 is not opposite to the parasitic current on the third connection part 27. Optionally, the parasitic current on the third connection part 27 can be in the same direction as the current on the antenna radiator 23, so that the third connection part 27 becomes a parasitic of the antenna radiator 23, thereby enhancing the performance of the antenna radiator 23.

[0098] In order to save space in the earphone housing 1, optionally, the third connecting part 27 and the second connecting part 26 form a U-shaped structure, so that the second connecting part 26 and the third connecting part 27 are both straight and parallel, making the space of the Bluetooth headset 100 compact and also facilitating the layout of the antenna structure of the Bluetooth headset 100.

[0099] In the present application, there may be multiple specific positions of the third connection portion 27. In the following, two feasible implementations are used to exemplify the specific arrangement of the third connection portion 27.

[0100] In a feasible implementation, Figure 6a and Figure 6b As shown, the third connection portion 27 can be arranged on the FPC 21 by in-mold injection molding, metal coating, flexible circuit board (i.e., steel sheet) or LDS manufacturing process, which is simple and easy to operate, saves the space of the ear handle portion 12, and enables the Bluetooth headset 100 to meet the demand for compact layout. For ease of explanation, Figure 6a and Figure 6bThe third connection part 27 is illustrated by taking the connection part 27a extending from one position of the second connection part 26 and the connection part 27b extending from another position of the second connection part 26 as examples. The connection part 27a is connected to the end of the second connection part 26, the connection part 27b is connected to the side of the second connection part 26, and the connection part 27a, the connection part 27b, the second connection part 26 and the antenna radiator 23 are parallel to each other.

[0101] It should be noted that Figure 6a and Figure 6b In the figure, the oblique lines in the connection part 27a, the connection part 27b, the second connection part 26 and the antenna radiator 23 are not the corresponding section lines of the connection part 27a, the connection part 27b, the second connection part 26 and the antenna radiator 23 respectively, but are for the convenience of distinguishing the connection part 27a, the connection part 27b, the second connection part 26 and the antenna radiator 23.

[0102] The present application does not limit the specific position of the third connection portion 27 on the FPC 21. Optionally, the third connection portion 27 is close to the antenna radiator 23, ensuring that the third connection portion 27 acts as a parasitic of the antenna radiator 23 to improve antenna performance.

[0103] Next, it is assumed that an operating frequency band of the antenna radiator 23 is 2.4 GHz-2.5 GHz. Figure 7 , a reflection coefficient S11 curve of the antenna architecture in the Bluetooth headset 100 of the present application is illustrated. Figure 7 In the figure, the horizontal axis is frequency in megahertz (GHz), and the vertical axis is reflection coefficient S11 in dBa. Reflection coefficient S11 is one of the S parameters (i.e. scattering parameters), which indicates the return loss characteristics. Generally, the loss dB value and impedance characteristics are viewed through a network analyzer. This parameter indicates how well the antenna matches the front-end circuit. The larger the reflection coefficient S11, the greater the energy reflected by the antenna itself, and the worse the antenna matching. For example, the S11 value of antenna A at a certain frequency is -1, and the S11 value of antenna B at the same frequency is -3. Antenna B has a better matching degree than antenna A.

[0104] like Figure 7 As shown, curve 1 shows the Figure 1 and Figure 2 The S11 curve of the Bluetooth headset 200 structure is shown in FIG. 2 , and the curve 2 shows the structure of the Bluetooth headset 200 structure based on FIG. Figure 6a and Figure 6bThe S11 curve of the structure of the Bluetooth headset 100 is shown. In Curve 2, when the operating frequency of the antenna radiator 23 is 2.4 GHz, the S11 value is -7.863 dBa. When the operating frequency of the antenna radiator 23 is 2.5 GHz, the S11 value is -13.226 dBa. Compared with the S11 value of Curve 1 in the 2.4 GHz-2.5 GHz operating frequency band, the S11 value of Curve 2 in the 2.4 GHz-2.5 GHz operating frequency band is smaller. It can be seen that the antenna radiator 23 corresponding to Curve 2 has a wider bandwidth and better antenna performance.

[0105] Next, it is assumed that an operating frequency band of the antenna radiator 23 is 2.4 GHz-2.5 GHz. Figure 8 , the coefficient efficiency curve of the antenna architecture in the Bluetooth headset 100 of the present application is illustrated. Figure 8 In the figure, the horizontal axis is frequency in megahertz (GHz), and the vertical axis is coefficient efficiency in dB.

[0106] like Figure 8 As shown, curve 1 shows the Figure 1 and Figure 2 The coefficient efficiency curve of the Bluetooth headset 200 structure is shown in FIG. 2 , and curve 2 shows the coefficient efficiency curve based on Figure 6a and Figure 6b The coefficient efficiency curve of the structure of the Bluetooth headset 100 is shown. Compared with the coefficient efficiency value of curve 1 in the 2.4 GHz-2.5 GHz operating frequency band, the coefficient efficiency value of curve 2 in the 2.4 GHz-2.5 GHz operating frequency band is smaller, which shows that the antenna efficiency corresponding to curve 2 is higher and the antenna performance is better.

[0107] In another possible implementation, Figure 9a , Figure 9b and Fig.9c As shown, the third connection portion 27 can be arranged on the ear handle portion 12 by insert molding, flexible circuit board (i.e., steel sheet) or LDS or other manufacturing processes, such as on the inner wall or outer wall of the ear handle portion 12, which makes full use of the ear handle portion 12 and saves the space of the ear handle portion 12, so that the Bluetooth headset 100 meets the demand for compact layout. For the convenience of explanation, Figure 9a , Figure 9b and Fig.9c The third connection portion 27 is illustrated as a connection portion extending from a position of the second connection portion 26. The third connection portion 27 is connected to the end of the second connection portion 26, and the third connection portion 27 and the second connection portion 26 are parallel to each other. The Y direction is the length direction of the FPC 21, and the X direction is the vertical direction of the plane where the FPC 21 is located, and the X direction is perpendicular to the Y direction.

[0108] It should be noted that Figure 9a , Figure 9b and Fig.9c In the figure, the oblique lines in the third connection part 27, the second connection part 26 and the antenna radiator 23 are not the corresponding section lines of the third connection part 27, the second connection part 26 and the antenna radiator 23 respectively, but are for the convenience of distinguishing the third connection part 27, the second connection part 26 and the antenna radiator 23.

[0109] Next, it is assumed that an operating frequency band of the antenna radiator 23 is 2.4 GHz-2.5 GHz. Fig.10 , a reflection coefficient S11 curve of the antenna architecture in the Bluetooth headset 100 of the present application is illustrated. Fig.10 In the figure, the horizontal axis is the frequency in megahertz (GHz), and the vertical axis is the reflection coefficient S11 in dBa.

[0110] like Fig.10 As shown, curve 1 shows the Figure 1 and Figure 2 The S11 curve of the Bluetooth headset 200 structure is shown in FIG. 2 , and the curve 2 shows the structure of the Bluetooth headset 200 structure based on FIG. Figure 9a , Figure 9b and Fig.9c The S11 curve of the structure of the Bluetooth headset 100 is shown. In Curve 2, when the operating frequency of the antenna radiator 23 is 2.4 GHz, the S11 value is -13.953 dBa. When the operating frequency of the antenna radiator 23 is 2.5 GHz, the S11 value is -9.2301 dBa. Compared with the S11 value of Curve 1 in the 2.4 GHz-2.5 GHz operating frequency band, the S11 value of Curve 2 in the 2.4 GHz-2.5 GHz operating frequency band is smaller. It can be seen that the antenna bandwidth corresponding to Curve 2 is wider and the antenna performance is better.

[0111] Next, it is assumed that an operating frequency band of the antenna radiator 23 is 2.4 GHz-2.5 GHz. Fig.11 , the coefficient efficiency curve of the antenna architecture in the Bluetooth headset 100 of the present application is illustrated. Fig.11 In the figure, the horizontal axis is frequency in megahertz (GHz), and the vertical axis is coefficient efficiency in dB.

[0112] like Fig.11 As shown, curve 1 shows the Figure 1 and Figure 2 The coefficient efficiency curve of the structure shown in Figure 2 shows the coefficient efficiency curve based on Figure 9a , Figure 9b and Fig.9cThe coefficient efficiency curve of the structure shown. Compared with the coefficient efficiency value of curve 1 in the 2.4GHz-2.5GHz operating frequency band, the coefficient efficiency value of curve 2 in the 2.4GHz-2.5GHz operating frequency band is smaller, which shows that the antenna corresponding to curve 2 has higher efficiency and better antenna performance.

[0113] The present application does not limit the specific position of the third connection portion 27 on the inner wall or outer wall of the ear handle portion 12. Figure 12-16 , three feasible embodiments are used to exemplify the specific position of the third connecting portion 27 on the inner wall or outer wall of the ear handle portion 12. For the convenience of explanation, Figure 12-16 The connection between the second connection portion 26 and the third connection portion 27 is not shown, and the antenna radiator 23 is located on the right side of the second connection portion 26 on the FPC 21, and the second connection portion 26, the third connection portion 27 and the antenna radiator 23 are parallel and have the same length.

[0114] In a feasible embodiment, optionally, the third connecting portion 27 is arranged along a vertical direction (ie, Figure 9a The projection of the FPC 21 on the plane where the FPC 21 is located (in the X direction) has an overlapping area with the antenna radiator 23, so that the Bluetooth headset 100 has good antenna performance. The size and position of the overlapping area are not limited in this application.

[0115] like Fig.12 As shown in FIG. 1 , all projections of the third connection portion 27 on the plane where the FPC 21 is located along the vertical direction of the plane where the FPC 21 is located are mapped within the antenna radiator 23. Fig.13 As shown, a portion of the third connection portion 27 on the plane where the FPC 21 is located along a direction perpendicular to the plane where the FPC 21 is located is projected onto the antenna radiator 23 .

[0116] In another feasible embodiment, optionally, the third connecting portion 27 is arranged along a vertical direction (ie, Figure 9a The projection of the FPC 21 on the plane where the FPC 21 is located is close to the antenna radiator 23, so that the Bluetooth headset 100 has better antenna performance. The distance between the projection and the antenna radiator 23 is not limited in this application.

[0117] like Fig.14 As shown, the projection of the third connection portion 27 on the plane where the FPC 21 is located in the vertical direction of the plane where the FPC 21 is located is mapped on the right side of the antenna radiator 23. Fig.15 As shown, the projection of the third connection portion 27 on the plane where the FPC 21 is located in a direction perpendicular to the plane where the FPC 21 is located is mapped between the second connection portion 26 and the antenna radiator 23 .

[0118] In another feasible embodiment, optionally, the third connecting portion 27 is arranged along a vertical direction (ie, Figure 9a The projection of the projection (in the X direction) on the plane where the FPC 21 is located is far away from the antenna radiator 23 and close to the second connecting portion 26, so that the Bluetooth headset 100 has better antenna performance. The distance between the projection and the antenna radiator 23 is not limited in this application.

[0119] like Fig.16 As shown, the projection of the third connection portion 27 on the plane where the antenna radiator 23 is located along a direction perpendicular to the plane where the antenna radiator 23 is located is mapped on the left side of the second connection portion 26 .

[0120] Embodiment 2

[0121] In the second embodiment, Fig.17a and Fig.17b As shown, optionally, any third connection part 27 may include: a connection part extending from one or more positions on the second connection part 26 close to the bottom end of the ear handle part 12 in a curved shape toward the bottom end of the ear handle part 12, making full use of the space at the bottom end of the ear handle part 12, and realizing a compact layout of the Bluetooth headset 100. In addition, the parasitic current on the third connection part 27 flows from the connection with the second connection part 26 along the body of the third connection part 27 to the end of the third connection part 27, so that the third connection part 27 becomes a parasitic of the antenna radiator 23, thereby enhancing the performance of the antenna radiator 23.

[0122] The present application does not limit the degree of bending deformation of the third connecting portion 27, and it is sufficient that the total length of the second connecting portion 26 and the third connecting portion 27 is greater than 1 / 4 of the aforementioned wavelength. Fig.17a and Fig.17b The third connection portion 27 is taken as an example to extend from a position on the second connection portion 26 close to the bottom end of the ear handle portion 12.

[0123] It should be noted that Fig.17a and Fig.17b In the figure, the oblique lines in the third connection part 27, the second connection part 26 and the antenna radiator 23 are not the corresponding section lines of the third connection part 27, the second connection part 26 and the antenna radiator 23 respectively, but are for the convenience of distinguishing the third connection part 27, the second connection part 26 and the antenna radiator 23.

[0124] Embodiment 3

[0125] In the third embodiment, Fig.18As shown, optionally, any third connection part 27 may include: a metal outer wall of a battery 29, and a connection part connecting the metal outer wall of the battery 29 to at least one position on the second connection part 26 near the bottom end of the ear handle part 12, thereby making full use of the space occupied by the battery 29, saving space in the ear handle part 12, and realizing a compact layout of the Bluetooth headset 100.

[0126] The present application does not limit the thickness, material and area of ​​the metal outer wall. For example, the metal outer wall can be made of copper foil. Fig.18 In the figure, the third connecting portion 27 is taken as the entire metal outer wall of the battery 29 as an example for illustration.

[0127] It should be noted that Fig.18 In the figure, the oblique lines in the second connection portion 26 and the antenna radiator 23 are not the corresponding section lines of the second connection portion 26 and the antenna radiator 23 respectively, but are used to facilitate the distinction between the second connection portion 26 and the antenna radiator 23.

[0128] Next, it is assumed that an operating frequency band of the antenna radiator 23 is 2.4 GHz-2.5 GHz. Fig.19 , a reflection coefficient S11 curve of the antenna architecture in the Bluetooth headset 100 of the present application is illustrated. Fig.19 In the figure, the horizontal axis is the frequency in megahertz (GHz), and the vertical axis is the reflection coefficient S11 in dBa.

[0129] like Fig.19 As shown, curve 1 shows the Figure 1 and Figure 2 The S11 curve of the structure shown in the figure, Curve 2 shows the S11 curve based on Fig.18 The S11 curve of the structure shown. In curve 2, when the operating frequency of the antenna radiator 23 is 2.4 GHz, the S11 value is -15.501 dBa. When the operating frequency of the antenna radiator 23 is 2.5 GHz, the S11 value is -15.621 dBa. Compared with the S11 value of curve 1 in the 2.4 GHz-2.5 GHz operating frequency band, the S11 value of curve 2 in the 2.4 GHz-2.5 GHz operating frequency band is smaller. It can be seen that the antenna bandwidth corresponding to curve 2 is wider and the antenna performance is better.

[0130] Next, it is assumed that an operating frequency band of the antenna radiator 23 is 2.4 GHz-2.5 GHz. Fig. 20 , the coefficient efficiency curve of the antenna architecture in the Bluetooth headset 100 of the present application is illustrated. Fig. 20 In the figure, the horizontal axis is frequency in megahertz (GHz), and the vertical axis is coefficient efficiency in dB.

[0131] like Fig. 20As shown, curve 1 shows the Figure 1 and Figure 2 The coefficient efficiency curve of the structure shown in Figure 2 shows the coefficient efficiency curve based on Fig.18 The coefficient efficiency curve of the structure shown. Compared with the coefficient efficiency value of curve 1 in the 2.4GHz-2.5GHz operating frequency band, the coefficient efficiency value of curve 2 in the 2.4GHz-2.5GHz operating frequency band is smaller, which shows that the antenna corresponding to curve 2 has higher efficiency and better antenna performance.

[0132] It should be noted that, in addition to the above three embodiments of the third connecting portion 27 , the present application can also arbitrarily combine the above three embodiments to obtain the third connecting portion 27 .

[0133] For example, the present application combines embodiment 1 and embodiment 2, and any third connection portion 27 may include: a connection portion extending from at least one position on the second connection portion 26 close to the bottom end of the ear handle portion 12 toward the top end of the ear handle portion 12, and a connection portion extending from at least one position on the second connection portion 26 close to the bottom end of the ear handle portion 12 toward the bottom end of the ear handle portion 12 and being curved.

[0134] In the following, the second connecting portion 26, the third connecting portion 27 and the antenna radiator 23 are parallel and of equal length, and the third connecting portion 27 adopts the implementation form of the combination of the first embodiment and the second embodiment as an example. Fig.21 , a schematic diagram of the directions of the current on the second connection portion 26, the current on the antenna radiator 23 and the parasitic current on the third connection portion 27 is explained.

[0135] like Fig.21 As shown, the current I1 on the second connection part 26 flows from the bottom end of the ear handle part 12 to the grounding point b. The current I2 on the antenna radiator 23 flows from the feeding point a to the bottom end of the ear handle part 12. The third connection part 27 includes two parts, namely the connection part 271 and the connection part 272. Among them, the parasitic current I31 on the connection part 271 flows from the connection part 271 and the second connection part 26 to the end of the connection part 271. The parasitic current I32 on the connection part 272 flows from the connection part 272 and the second connection part 26 along the body bend of the connection part 272 to the end of the connection part 272. It can be seen that the current I1 is opposite to the current I2, the parasitic current I31 is in the same direction as the current I2, and the parasitic current I32 is not opposite to the current I2.

[0136] For another example, the present application combines Example 1 and Example 3, and any third connection portion 27 may include: a connection portion extending from at least one position on the second connection portion 26 near the bottom end of the ear handle portion 12 toward the top end of the ear handle portion 12, the metal outer wall of the battery 29, and a connection portion connecting the metal outer wall of the battery 29 to at least one position on the second connection portion 26 near the bottom end of the ear handle portion 12.

[0137] For another example, the present application combines Example 2 and Example 3, and any third connection portion 27 may include: a connection portion that extends from at least one position on the second connection portion 26 near the bottom end of the ear handle portion 12 toward the bottom end of the ear handle portion 12 and is curved, the metal outer wall of the battery 29, and a connection portion that connects the metal outer wall of the battery 29 to at least one position on the second connection portion 26 near the bottom end of the ear handle portion 12.

[0138] For another example, the present application combines Example 1, Example 2 and Example 3, and any third connection portion 27 may include: a connection portion extending from at least one position on the second connection portion 26 near the bottom end of the ear handle portion 12 toward the top end of the ear handle portion 12, a curved connection portion extending from at least one position on the second connection portion 26 near the bottom end of the ear handle portion 12 toward the bottom end of the ear handle portion 12, the metal outer wall of the battery 29, and a connection portion connecting the metal outer wall of the battery 29 to at least one position on the second connection portion 26 near the bottom end of the ear handle portion 12.

[0139] In order to further explain that the Bluetooth headset 100 of the present application has good antenna performance, the following compares the antenna performance of the traditional Bluetooth headset 200 with the antenna performance of the Bluetooth headset 100 of the present application from three aspects: the distribution of current on the signal processing component 2, the reflection coefficient S11 of the antenna structure, and the coefficient efficiency of the antenna structure of the Bluetooth headset 100 of the present application.

[0140] In the first aspect, for the sake of convenience, the second connecting portion 26, the third connecting portion 27 and the antenna radiator 23 are parallel and of equal length. Fig.22a , Figure 22b-Figure 22c , respectively illustrate the distribution of current on the signal processing component 2 in the Bluetooth headset 100.

[0141] in, Fig.22a The figure shows an antenna structure in which the second connection part 26 and the antenna radiator 23 are present in the Bluetooth headset 100, but the third connection part 27 is not present. Fig.22a The antenna architecture shown is similar to Figure 1 Hehe Figure 2 The antenna structure of the Bluetooth headset 200 is similar. Figure 22bIt shows that the Bluetooth headset 100 of the present application has a second connection part 26, an antenna radiator 23, and an antenna structure using the third connection part 27 of the second embodiment. Fig.22c It shows that the Bluetooth headset 100 of the present application has a second connection part 26, an antenna radiator 23 and an antenna structure using the third connection part 27 of the third embodiment.

[0142] like Fig.22a , Figure 22b and Fig.22c As shown, Fig.22a Compared with the current distribution on the signal processing component 2, Figure 22b The current distribution range of the middle signal processing component 2 is wider and the intensity is stronger. Fig.22c The current distribution range of the signal processing component 2 is the widest and the intensity is the strongest. Therefore, compared with the traditional Bluetooth headset 200, the Bluetooth headset 100 of the present application effectively improves the antenna performance of the Bluetooth headset 100 because the third connecting portion 27 becomes the parasitic of the antenna radiator 23.

[0143] In the second aspect, for the sake of convenience, it is assumed that an operating frequency band of the antenna radiator 23 is 2.4 GHz-2.5 GHz. Fig.22a , Figure 22b-Figure 22c The antenna architecture shown, combined with Fig.23 , the reflection coefficient S11 curve of the antenna architecture is illustrated. Fig.23 In the figure, the horizontal axis is the frequency in megahertz (GHz), and the vertical axis is the reflection coefficient S11 in dBa.

[0144] like Fig.23 As shown, curve 1 shows the Fig.22a The S11 curve of the antenna architecture shown in the figure, Curve 2 shows the S11 curve based on Figure 22b The S11 curve of the antenna architecture shown in Figure 3 shows the S11 curve based on Fig.22c The S11 curve of the antenna architecture shown. Compared with curve 1, the antenna performance corresponding to curve 2 is good, and the antenna performance corresponding to curve 3 is the best. Therefore, compared with the traditional Bluetooth headset 200, the antenna performance of the Bluetooth headset 100 of the present application is effectively improved.

[0145] In the third aspect, for the sake of convenience, it is assumed that an operating frequency band of the antenna radiator 23 is 2.4 GHz-2.5 GHz. Fig.22a , Figure 22b-Figure 22c The structure shown, combined with Fig.24 , the coefficient efficiency curve of the antenna architecture is illustrated. Fig.24 In the figure, the horizontal axis is frequency in megahertz (GHz), and the vertical axis is coefficient efficiency in dB.

[0146] like Fig.24 As shown, curve 1 shows the Fig.22a The system efficiency curve of the antenna architecture shown in Figure 2 shows the system efficiency curve based on Figure 22b The system efficiency curve of the antenna architecture shown in Figure 3 shows the system efficiency curve based on Fig.22c The system efficiency curve of the antenna architecture shown in FIG. 1 is shown in FIG. 2 . Compared with curve 1, the antenna performance corresponding to curve 2 is good, and the antenna performance corresponding to curve 3 is optimal. Therefore, compared with the traditional Bluetooth headset 200, the antenna performance of the Bluetooth headset 100 of the present application is effectively improved.

[0147] In summary, the introduced third connection portion 27 becomes a parasitic of the antenna radiator 23, thereby enhancing the antenna performance of the Bluetooth headset 100 of the present application, and enabling the Bluetooth headset 100 of the present application to communicate well.

Claims

1. A Bluetooth headset, characterized in that: The Bluetooth headset comprises: An earphone housing, the earphone housing comprising an earplug portion and an ear handle portion; A flexible circuit board (FPC), wherein a first portion of the FPC is disposed on the ear handle portion, and the first portion of the FPC includes a feeding point; and Antenna, including: An antenna radiator is disposed on the first portion of the FPC, and the antenna radiator is electrically connected to the feeding point on the FPC; A first connection portion, used as a main ground of the Bluetooth headset; a second connection portion, located at the ear handle portion, the second connection portion comprising a grounding point, the grounding point being electrically connected to the first connection portion, and the grounding point being at a preset distance from the feeding point; and a third connection portion, located at the ear handle portion, the third connection portion being connected to the second connection portion at a first position of the second connection portion, the first position being different from the grounding point, the third connection portion being spaced from the antenna radiator by a first gap, and the third connection portion being used to couple with the antenna radiator through the first gap; The current on the antenna radiator flows from the feeding point to the bottom end of the ear handle, and the parasitic current on the third connection part flows from the first position to the end of the third connection part. The current on the antenna radiator and the parasitic current on the third connection part are not reversed.

2. The Bluetooth headset according to claim 1, characterized in that: The second connection portion is disposed on the FPC.

3. The Bluetooth headset according to claim 1 or 2, characterized in that: The antenna radiator is arranged on the FPC by in-mold injection molding, metal coating, flexible circuit board or laser direct forming process; and / or, The second connection portion is arranged on the FPC by using in-mold injection molding, metal coating, flexible circuit board or laser direct forming process.

4. The Bluetooth headset according to claim 1 or 2, characterized in that: The first position is on the second connection portion, close to the bottom end of the ear handle portion relative to the top end of the ear handle portion, wherein the third connection portion includes: a connection portion extending from the first position toward the top end of the ear handle portion.

5. The Bluetooth headset according to claim 4, characterized in that: The third connecting portion and the second connecting portion form a U-shaped structure.

6. The Bluetooth headset according to claim 4, characterized in that: The third connection portion is disposed on the FPC.

7. The Bluetooth headset according to claim 4, characterized in that: A projection of the third connection portion on the plane where the FPC is located along a direction perpendicular to the plane where the FPC is located has an overlapping area with the antenna radiator.

8. The Bluetooth headset according to claim 4, characterized in that: A projection of the third connection portion on the plane where the FPC is located along a direction perpendicular to the plane where the FPC is located is adjacent to the antenna radiator or adjacent to the second connection portion.

9. The Bluetooth headset according to claim 1 or 2, characterized in that: The first position is on the second connection portion, close to the bottom end of the ear handle portion relative to the top end of the ear handle portion, wherein the third connection portion includes: a connection portion extending from the first position toward the bottom end of the ear handle portion and being curved.

10. The Bluetooth headset according to claim 1 or 2, characterized in that: The Bluetooth headset further includes a battery, and the third connecting portion includes: A metal outer wall of a battery, and a connecting portion connecting the metal outer wall of the battery and the first position.

11. The Bluetooth headset according to any one of claims 1-2 and 5-8, characterized in that: The feeding point is located at the top of the ear handle, and the grounding point is located at the ear handle.

12. The Bluetooth headset according to any one of claims 1-2 and 5-8, characterized in that: The length of the antenna radiator is less than 1 / 4 of the wavelength corresponding to the working frequency band of the antenna.

13. The Bluetooth headset according to any one of claims 1-2 and 5-8, characterized in that: The length of the first connecting portion is less than 1 / 4 of a wavelength corresponding to a working frequency band of the antenna.

14. The Bluetooth headset according to claim 12, characterized in that: The total length of the second connecting portion and the third connecting portion is greater than 1 / 4 of the wavelength.

15. The Bluetooth headset according to claim 13, characterized in that: The total length of the second connecting portion and the third connecting portion is greater than 1 / 4 of the wavelength.

16. The Bluetooth headset according to claim 12, characterized in that: The total length of the second connecting portion and the third connecting portion is less than or equal to 1 / 2 of the wavelength.

17. The Bluetooth headset according to claim 13, characterized in that: The total length of the second connecting portion and the third connecting portion is less than or equal to 1 / 2 of the wavelength.

18. The Bluetooth headset according to any one of claims 1-2, 5-8, 14-17, characterized in that: At least a portion of the FPC extends in a direction from the top end of the ear handle portion to the earplug portion.

19. The Bluetooth headset according to any one of claims 1-2, 5-8, 14-17, characterized in that: The first connecting portion is located on the earplug portion.

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