WO2012072015A1

WO2012072015A1 - Bluetooth earphone

Info

Publication number: WO2012072015A1
Application number: PCT/CN2011/083079
Authority: WO
Inventors: Youxing Shu; Haitao Jiao
Original assignee: Byd Company Limited
Priority date: 2010-11-29
Filing date: 2011-11-28
Publication date: 2012-06-07

Abstract

A Bluetooth earphone may be provided. The Bluetooth earphone may comprise: a lower shell (1) with an earplug (10) disposed on a bottom surface thereof; an upper shell (2) locked with the lower shell (1) to form a cavity with a front opening (5); a moving assembly disposed in the cavity; and a USB interface (3) disposed in the cavity, connected with the moving assembly, and extended from and retracted to the cavity via the front opening (5) through the moving assembly.

Description

BLUETOOTH EARPHONE

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to and benefits of the following applications:

1) Chinese Patent Application No. 201010577819.6 filed with the State Intellectual Property

Office of P. R. China on November 29, 2010; and

2) Chinese Patent Application No. 201010577800.1 filed with the State Intellectual Property

Office of P. R. China on November 29, 2010.

The above enumerated patent applications are incorporated herein by reference.

FIELD

The present disclosure relates to the field of wireless communication, more particularly to a Bluetooth earphone. BACKGROUND

The Bluetooth technology makes short-distance wireless communication between devices more efficient and simpler. At present, a Bluetooth earphone has been widely used in mobile phones, vehicle-mounted devices, PCs, MP3/DVD, music players, etc. With the increased applicability of the Bluetooth earphone, the requirements for convenient, safe, and efficient charging of the Bluetooth earphone are becoming higher and stricter.

Conventional charging devices for the Bluetooth earphone are an adapter with a long wire or an extra USB circuit. Both of the adapter and the extra USB circuit are inconvenient to take and may cause potential safety risks, and the overall appearance of the Bluetooth earphone may also be influenced.

SUMMARY

The present disclosure is directed to solve at least one of the problems existing in the prior art. Accordingly, a safe portable Bluetooth earphone may need to be provided.

According to an aspect of the present disclosure, a Bluetooth earphone may be provided. The Bluetooth earphone may comprise: a lower shell with an earplug disposed on a bottom surface thereof; a upper shell locked with the lower shell to define a cavity with a front opening; a moving assembly disposed in the cavity; and a USB interface disposed in the cavity and connected with the moving assembly which is capable of being extended from and retracted to the cavity via the front opening through the moving assembly.

With the Bluetooth earphone according to an embodiment of the present disclosure, the USB interface disposed in the Bluetooth earphone may be utilized to realize wireless charging of the Bluetooth earphone, and no adapter with a long wire may be needed, and thus the charging process may be convenient and the Bluetooth earphone may be convenient to carry. Moreover, the USB interface may be retracted to a cavity when not used and may be extended from the cavity when used, and thus the structure of the Bluetooth earphone may be compact, the USB interface may not be easily damaged, and a safe portable aesthetic Bluetooth earphone with pleasing aesthetics may be provided.

Additional aspects and advantages of the embodiments of present disclosure will be given in part in the following descriptions, become apparent in part from the following descriptions, or be learned from the practice of the embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other features and advantages of the disclosure will become apparent and more readily appreciated from the following descriptions taken in conjunction with the drawings in which:

Fig. 1 is a perspective view of a Bluetooth earphone according to a first embodiment of the present disclosure;

Fig. 2 is a bottom view of a USB interface with an upper shell in the Bluetooth earphone shown in Fig. 1 when the upper shell moves to a front limit position;

Fig. 3 is a top rear perspective view of a USB interface with a lower shell in the Bluetooth earphone shown in Fig. 1 when the upper shell moves to a front limit position;

Fig. 4 is a schematic perspective view of a Bluetooth earphone according to an embodiment of the present disclosure, illustrating that the upper shell shown in Fig. 1 slides backwards;

Fig. 5 is a schematic view showing a movement of a moving assembly in a Bluetooth earphone according to an embodiment of the present disclosure when the upper shell shown in Fig. 4 slides backwards;

Fig. 6 is a schematic view of a USB interface with the upper shell when the upper shell shown in Fig. 4 moves backwards to a back limit position;

Fig. 7 is a schematic view of a Bluetooth earphone according to an embodiment of the present disclosure, illustrating that the USB interface shown in Fig. 1 moves forwards from the back limit position together with the upper shell;

Fig. 8 is a bottom view of the Bluetooth earphone shown in Fig. 1 when the USB interface fully extends from a cavity;

Fig. 9 is a schematic view of a movement of the moving assembly in the Bluetooth earphone shown in Fig. 1 when the USB interface shown in Fig. 1 is moving back to the cavity;

Fig. 10 is a bottom view of the Bluetooth earphone shown in Fig. 9 when the USB interface is moving back to the cavity;

Fig. 11 is a perspective view of a Bluetooth earphone according to a second embodiment of the present disclosure;

Fig. 12 is a perspective view of the Bluetooth earphone shown in Fig. 11 when a plug thereof is unplugged;

Fig. 13 is a schematic view of a USB interface and a upper shell in the Bluetooth earphone shown in Fig. 11 when the USB interface is not extended from the cavity and a second end of a connecting rod is blocked by a back V-shaped opening;

Fig. 14 is a schematic view of a movement of the moving assembly when the USB interface shown in Fig. 13 is sliding forwards and the second end of the connecting rod moves to a back part of a second groove;

Fig. 15 is a schematic view of a movement of the moving assembly when the USB interface shown in Fig. 13 is sliding forwards and the second end of the connecting rod moves to a substantially middle part of a second groove;

Fig. 16 is a schematic view of a movement of the moving assembly when the USB interface shown in Fig. 13 is moving forwards and the second end of the connecting rod moves to a front part of a second groove;

Fig. 17 is a perspective view of the Bluetooth earphone shown in Fig. 11 when the USB interface is completely spring out from the cavity; Fig. 18 is a schematic view illustrating that the second end of the connecting rod is blocked by a front V-shaped opening after the USB interface shown in Fig. 11 is extended from the cavity;

Fig. 19 is a schematic view illustrating that the second end of the connecting rod moves to a front part of a first groove when the USB interface is retracting to the cavity according to a second embodiment of the present disclosure;

Fig. 20 is a schematic view illustrating that the second end of the connecting rod moves to a substantially middle part of a first groove when the USB interface is moving back to the cavity according to a second embodiment of the present disclosure; and

Fig. 21 is a schematic view illustrating that the second end of the connecting rod moves to a back part of a first groove when the USB interface is retracted to the cavity according to a second embodiment of the present disclosure.

DETAILED DESCRIPTION

Reference will be made in detail to embodiments of the present disclosure. The embodiments described herein with reference to drawings are explanatory, illustrative, and used to generally understand the present disclosure. The embodiments shall not be construed to limit the present disclosure. The same or similar elements and the elements having same or similar functions are denoted by like reference numerals throughout the descriptions.

In the description, relative terms such as "inner", "outer", "longitudinal", "lateral", "front", "back", "above", "below", "top", "bottom" as well as derivative thereof should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present disclosure be constructed or operated in a particular orientation.

First Embodiment

A Bluetooth earphone according to a first embodiment of the present disclosure will be described below with reference to the drawings.

As shown in Fig. 1, the Bluetooth earphone may comprise: a lower shell 1 with an earplug 10 disposed on its bottom surface; a upper shell 2 locked with the lower shell 1 to form a cavity (not shown) with a front opening 5; a moving assembly disposed in the cavity; and a USB interface 3 disposed in the cavity, connected with the moving assembly, and extended from and retracted to the cavity via the front opening 5 by the moving assembly.

With the Bluetooth earphone according to an embodiment of the present disclosure, the USB interface disposed in the Bluetooth earphone may be utilized to realize wireless charging of the Bluetooth earphone, and no adapter with a long wire may be needed, and thus the charging process may be convenient and the Bluetooth earphone may be convenient to carry. Moreover, the USB interface may be retracted to a cavity when not used and may be extended from the cavity when used, and thus the structure of the Bluetooth earphone may be compact, the USB interface may not be easily damaged, and a safe portable aesthetic Bluetooth earphone may be provided.

According to a first embodiment of the present disclosure and as shown in Fig. 1 to Fig. 10, the upper shell 2 is configured to slide between a front limit position and a back limit position relative to the lower shell 1 in a longitudinal direction so that the USB interface 3 may be spring out or extended from and/or retracted to the cavity. The front limit position of the upper shell 2 is a position where a front end of the upper shell 2 is aligned with a front end of the lower shell 1, and the back limit position of the upper shell 2 is a position where the upper shell 2 is stopped after it slides backwards a predetermined distance relative to the lower shell 1.

The USB interface 3 is slidably disposed on an inner surface of the front end of the upper shell 2, and the USB interface 3 is extended from the front opening 5 of the cavity when the upper shell 2 slides backwards relative to the lower shell 1 and the USB interface 3 to the back limit position, and then the USB interface 3 slides forwards relative to the lower shell 1 to the front limit position together with the upper shell 2 by the moving assembly.

In one embodiment of the present disclosure and as shown in Fig. 2, the moving assembly comprises a connecting rod 41, a sliding groove 42 and a spring 43. The sliding groove 42 is disposed in an inner surface of the upper shell 2 and formed with a V-shaped opening 421 facing forwards in a front end thereof. Optionally, the sliding groove 42 may be formed by forming a concave groove in the inner surface of the upper shell 2. In one embodiment of the present disclosure, the sliding groove 42 comprises a first groove 422 and a second groove 423, a back end of the first groove 422 is connected with a back end of the second groove 423, and a front end of the first groove 422 is connected with a front end of the second groove 423 through the V-shaped opening 421. Compared with the second groove 423, the first groove 422 is further away from two lateral sides of the upper shell 2 in the lateral direction. In one embodiment of the present disclosure, each of the first groove 422 and the second groove 423 is formed into a minor arc opening, and the minor arc opening of the first groove 422 is opposite to the minor arc opening of the second groove 423. For example, the first groove 422 and the second groove 423 are connected with each other so that the sliding groove 42 may be formed into a long and narrow olive form as shown in Fig. 2.

A first end of the connecting rod 41 may be connected with a back end of the USB interface 3, and a second end of the connecting rod 41 may slide in the sliding groove 42 in a unidirectional circular manner. In one embodiment of the present disclosure, the second end of the connecting rod 41 may be formed with a protrusion 411 as shown in Fig. 3 in a downward direction so that the connecting rod 41 may slide in the sliding groove 42 shown in Fig. 2.

A spring 43 may be disposed between the upper shell 2 and the USB interface 3 to push the connecting rod 41 to slide in the sliding groove 42. In one embodiment of the present disclosure, each side of the back end of the USB interface 3 is formed with an extending part 31 in the lateral direction, and the spring 43 is disposed between front surfaces of two extending parts 31 of the USB interface 3 and a front end face of the upper shell 2 as shown in Figs.2, 5 and 6.

In one embodiment of the present disclosure, there are two moving assemblies which are symmetric with respect to a longitudinal central line of the upper shell 2, and thus the upper shell 2 may slide stably relative to the lower shell 1 and the USB interface 3 so as to ensure that the Bluetooth earphone may have compact structure in addition to convenient usage.

In another embodiment of the present disclosure and as shown in Fig. 3, the lower shell 1 may be formed with a blocking plate 12, and the blocking plate 12 may be spaced apart from a front end face of the lower shell 1 by a predetermined distance so as to block the USB interface 3 when the upper shell 2 is moved from the front limit position to the back limit position relative to the lower shell 1 and the USB interface 3, thus preventing the USB interface 3 from sliding along with the upper shell 2. In one embodiment of the present disclosure, the distance from the blocking plate 12 to the front end face of the lower shell 1 may be equal to or slightly greater than the distance from the back end face of the USB interface 3 to the front end face of the upper shell 2.

In some embodiments of the present disclosure and as shown in Fig. 1-10, a guide groove 11 may be disposed in a longitudinal side of the lower shell 1, and longitudinal sides of the upper shell 2 may be slidably clipped in the guide groove 11. With the Bluetooth earphone according to an embodiment of the present disclosure, the USB interface disposed in the Bluetooth earphone may be utilized to realize wireless charging and no adapter with a long wire may be needed, which may be different from conventional earphone as the charging interface of the conventional earphone may be exposed and its external cover may easily be dropped. Therefore, the charging process of the Bluetooth earphone of the present disclosure may be convenient in addition to convenient portability.

As shown in Fig. 1-10, the method of using the Bluetooth earphone according to the first embodiment of the present disclosure will be described below.

The method of the USB interface 3 extending from the cavity may be described as the following.

As shown in Fig. 1-2, when the USB interface 3 is in its initial position, the upper shell 2 is positioned in the front limit position, that is, the front end of the upper shell 2 is aligned with the front end of the lower shell 1. At this time, the spring 43 may be slightly compressed by the USB interface 3 and the front end face of the upper shell 2, and a second end of the connecting rod 41 is located in the backmost end of the sliding groove 42.

As shown in Fig. 4, when the upper shell 2 is pushed backwards by a user, the USB interface 3 is blocked by the blocking plate 12 and may not be moved backwards, and thus the upper shell 2 is moved backwards relative to the lower shell 1 and the USB interface 3 until the upper shell 2 reaches the back limit position. As shown in Fig. 5, during the above mentioned process, the spring 43 is compressed and the second end of the connecting rod 41 moves from the second groove 423 to a front end of the sliding groove 42.

When the upper shell 2 reaches the back limit position, the user may stop pushing the upper shell 2, and the connecting rod 41 may be moved backwards under the elastic force of the spring 43 and blocked by the V-shaped opening 421 when the second end of the connecting rod 41 is slightly moved backwards into the V-shaped opening 421, and thus the connecting rod 41 may not be moved backwards any more, as shown in Fig. 6. At this time, the USB interface 3 may be static relative to the upper shell 2.

Then, as shown in Fig. 7, the user pushes the upper shell 2 forwards from the back limit position of the upper shell 2. As the upper shell 2 may be static relative to the USB interface 3, the USB interface 3 and the upper shell 2 together slide forwards relative to the lower shell 1 , until the upper shell 2 reaches the front limit position, that is, the front end face of the upper shell 2 is aligned with the front end face of the lower shell 1. At this time, the USB interface 3 may be fully extended from the cavity via the front opening 5 so as to make the Bluetooth earphone be ready for charging, as shown in Fig. 8.

The method to make the USB interface move back to the cavity may be described as the following.

When the charging process is finished, the user may slightly push the upper shell 2 forwards and the second end of the connecting rod 41 slides out of the V-from opening 421, and thus the upper shell 2 may be moved backwards and the spring 43 may be expanded to push the connecting rod 41 such that the second end of the connecting rod 41 may move from the front part of the sliding groove 42 to a back part of the sliding groove 42 through the first groove 422. Therefore, the spring 43 may restore to its initial state. As shown in Figs. 9-10, during this process, the USB interface 3 may slide backwards relative to the lower shell 1 and the upper shell 2 until the USB interface 3 is retracted into the cavity.

Second Embodiment

A Bluetooth earphone according to a second embodiment of the present disclosure will be described below with reference to Figs. 11-21.

As shown in Figs. 11-21, the Bluetooth earphone according to the second embodiment of the present disclosure may comprise a USB interface 3. The USB interface 3 is slidably disposed on an inner surface of a front end of the upper shell 2 in a longitudinal direction. The USB interface 3 is extended from the front opening 5 and located in position by the moving assembly under a first backward external force, and the USB interface 3 is retracted into the cavity by the moving assembly under a second forward external force.

With the Bluetooth earphone according to an embodiment of the present disclosure, the USB interface disposed in the Bluetooth earphone may be utilized to realize wireless charging of the Bluetooth earphone and no adapter with a long wire may be needed, and thus the charging process may be convenient in addition to convenient portability. Moreover, by pressing and pulling the USB interface, the USB interface may be extended from the cavity when used and may be retracted into the cavity when not used, and thus the structure of the Bluetooth earphone may be compact and a safe portable aesthetic Bluetooth earphone may be provided. Therefore, the USB interface may simply be extended from and retracted into the cavity which is not easy for damage.

As shown in Figs. 11-21 and according to an embodiment of the present disclosure, the moving assembly comprises a sliding groove 42, a connecting rod 41, a blocking plate 44 and a spring 43. The sliding groove 42 may comprise a first groove 422 and a second groove 423, and the sliding groove 42 is formed in the inner surface of the upper shell 2. A front V-shaped opening 4211 facing forwards is formed in a front end of the sliding groove 42, and a back V-shaped opening 4212 facing backwards is formed in a back end of the sliding groove 42. Optionally, the sliding groove 42 may be formed by forming a concave groove in the inner surface of the upper shell 2. Optionally, a back end of the first groove 422 may be connected with a back end of the second groove 423 through the back V-shaped opening 4212, and a front end of the first groove 422 may be connected with a front end of the second groove 423 through the front V-shaped opening 4211.

In one embodiment of the present disclosure and as shown in Fig. 13-Fig. 21, each of the first groove 422 and the second groove 423 is a straight groove. Certainly, the present disclosure is not limited to this. In another embodiment of the present disclosure, each of the first groove 422 and the second groove 423 may comprise a minor arc opening, and the minor arc opening of the first groove 422 is opposite to the minor arc opening of the second groove 423. For example, the first groove 422 and the second groove 423 are connected with each other, such that the sliding groove 42 may be formed into a long and narrow olive form (not shown).

In one embodiment of the present disclosure, a first end of the connecting rod 41 is connected with a back end of the USB interface 3, and a second end of the connecting rod 41 may slide in the sliding groove 42 in unidirectional circular manner. Optionally, the second end of the connecting rod 41 may be formed with a protrusion in a downward direction (as shown in Fig. 13) to make the connecting rod 41 slide in the sliding groove 42 in unidirectional circular manner. For example, the second end of the connecting rod 41 may be moved clockwise in the sliding groove 42; namely, the connecting rod 41 is moved from the back part of the sliding groove 42 to the front part of the sliding groove 42 through the second groove 423, and then the connecting rod 41 is moved from the front part of the sliding groove 42 to the back part of the sliding groove 42 through the first groove 422.

In one embodiment of the present disclosure, the blocking plate 44 is fixed on the inner surface of the upper shell 2 and spaced apart from a front end face of the upper shell 2 by a predetermined distance. Specifically, the blocking plate 44 is disposed near the front part of the sliding groove 42. The spring 43 is disposed between the blocking plate 44 and a back end face of the USB interface 3 to push the connecting rod 41 to move in the sliding groove 42 in unidirectional circular manner, thus pushing the USB interface 3 to move forwards or backwards relative to the upper shell 2.

In one embodiment of the present disclosure, the moving assembly may be disposed on the longitudinal central line of the upper shell 2. Obviously, it should be noted that the present disclosure is not limited hereto. In another embodiment of the present disclosure, there may be two moving assemblies which are symmetric with respect to a longitudinal central line of the upper shell 2, and thus the upper shell 2 may slide stably relative to the lower shell 1 and the USB interface 3 so as to ensure that the Bluetooth earphone may have compact structure in addition to safe usage.

In addition, in one embodiment of the present disclosure, each side of the back end of the USB interface 3 is formed with an extending part 31 in the lateral direction such that the lateral width of the back end of the USB interface 3 extending part is greater than the width of the front opening 5 of the cavity, and thus the USB interface 3 may pass through the front opening 5 of the cavity but may not be detached from the cavity.

In another embodiment of the present disclosure, a guide groove (not shown) may be disposed in a longitudinal side of the lower shell 1, and longitudinal edges of the upper shell 2 may be slidably clipped in the guide groove.

In still another embodiment of the present disclosure, as shown in Fig. 11 to Fig. 21, the Bluetooth earphone may be formed with a plug 6 to seal the front opening 5 of the cavity for dust proofing and aesthetic pleasing.

With the Bluetooth earphone according to an embodiment of the present disclosure, the USB interface disposed in the Bluetooth earphone may be utilized to realize wireless charging and no adapter with a long wire may be needed, which may be different from conventional earphone as the charging interface of the conventional earphone may be exposed and its external cover may easily be dropped. Therefore, the charging process of the Bluetooth earphone of the present disclosure may be convenient, and the Bluetooth earphone of the present disclosure may also be convenient to carry.

As shown in Figs. 11-21, the method of using the Bluetooth earphone according to the second embodiment of the present disclosure will be described below.

The process of the USB interface extending from the cavity will be described as the following.

As shown in Figs. 11-13, when the USB interface 3 is in its initial position, the USB interface 3 is located in a bottom surface of the upper shell 2, and the spring 43 may be compressed by the back end face of the USB interface 3 and the blocking plate 44. At this time, the second end of the connecting rod 41 is located in the back V-shaped opening 4212 of the sliding groove 42. Due to the back V-shaped opening 4212 facing backwards, the second end of the connecting rod 41 may be blocked by the back V-shaped opening 4212 but may not be moved forwards under the elastic force of the spring 43.

As shown in Fig. 12, when the user opens the plug 6 and presses the USB interface 3 backwards via the front opening 5, the second end of the connecting rod 41 may be moved out of the back V-shaped opening 4212, as shown in Fig. 14. Then, the spring 43 may be extended to push the USB interface 3 out of the cavity through the front opening 5 and pull the connecting rod 41 such that the second end of the connecting rod 41 may move to the front part of the sliding groove 42 through the second groove 423, as shown in Fig. 15 and Fig. 16.

When the USB interface 3 is moved out of the cavity, the Bluetooth earphone may be ready for charging, as shown in Fig. 17. When the USB interface 3 is inserted into peripheral devices such as PC or DVD having a USB interface adapter, the USB interface 3 may be slightly pushed back by the USB interface such that the second end of the connecting rod 41 may move into the front V-shaped opening 4211, as shown in Fig. 18. As the front V-shaped opening 421 faces forwards, the connecting rod 41 may be blocked by the front V-shaped opening 421 and may not be moved backwards, and thus the USB interface 3 may not be retracted after it is extended from the cavity. Therefore, the charging process may be steady.

The process of the USB interface retracting into the cavity will be described as the following. When the charging process is finished, the user may draw the USB interface 3 forwards to its front limit position. At this time, the USB interface 3 may pull the connecting rod 41 such that the second end of the connecting rod 41 may move out of the front V-shaped opening 421. Then, the user may push the USB interface 3 backwards to compress the spring 43 and push the connecting rod 41 such that the second end of the connecting rod 41 may be moved to the back part of the groove 42 along the first groove 422, as shown in Fig. 19 and Fig. 20.

When the second end of the connecting rod 41 moves to the backmost end of the sliding groove 42, the USB interface 3 reaches the back limit position, and the user may stop pushing the USB interface 3. At this time, the compressed spring 43 may be expanded to push the USB interface 3 forwards and pull the connecting rod 41 such that the connecting rod 41 may move into the back V-shaped opening 4212 and be blocked by the back V-shaped opening 4212 accordingly. Therefore, the connecting rod 41 may not be moved forwards under the elastic force of the spring 43, and thus the USB interface 3 may be restored to its initial position as shown in Fig. 13 and then the user may seal the front opening 5 by the plug 6.

Certainly, it would be appreciated by those skilled in the art that, the above mentioned solution may not be limited to use in the Bluetooth earphone, however, it may also be used in other devices such as a U disk having a structure or configuration similar to the Bluetooth earphone.

Reference throughout this specification to "an embodiment", "some embodiments" or "one embodiment" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. Thus, the appearances of the phrases such as "in some embodiments" or "in one embodiment" in various places throughout this specification are not necessarily referring to the same embodiment or example of the disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Although explanatory embodiments have been shown and described, it would be appreciated by those skilled in the art that changes, alternatives, and modifications may be made in the embodiments without departing from spirit and principles of the disclosure. Such changes, alternatives, and modifications all fall into the scope of the claims and their equivalents.

Claims

WHAT IS CLAIMED IS:

1. A Bluetooth earphone, comprising:

a lower shell with an earplug disposed on a bottom surface thereof;

a upper shell locked with the lower shell to define a cavity with a front opening;

a moving assembly disposed in the cavity; and

a USB interface disposed in the cavity and connected with the moving assembly which is capable of being extended from and retracted to the cavity via the front opening through the moving assembly.

2. The Bluetooth earphone of claim 1, wherein the upper shell is configured to slidable between a front limit position and a back limit position relative to the lower shell in a longitudinal direction to make the USB interface extended from and retracted into the cavity; and

wherein the USB interface is slidably disposed on an inner surface of a front end of the upper shell, and the USB interface is extended from the front opening of the cavity when the upper shell slides backwards relative to the lower shell and the USB interface to the back limit position, and then the USB interface slides forwards relative to the lower shell to the front limit position together with the upper shell by the moving assembly.

3. The Bluetooth earphone of claim 2, wherein the moving assembly comprises:

a connecting rod with a first end connected with a back end of the USB interface;

a sliding groove formed in the inner surface of the upper shell, in which a V-shaped opening facing forwards is formed in a front end of the sliding groove, and a second end of the connecting rod is configured to slide in the sliding groove in unidirectional circular manner; and

a spring disposed between the upper shell and the USB interface to push the connecting rod to slide in the sliding groove.

4. The Bluetooth earphone of claim 3, wherein the sliding groove comprises:

a first groove; and

a second groove with a back end thereof communicated with a back end of the first groove and a front end communicated with a front end of the first groove through the V-shaped opening.

5. The Bluetooth earphone of claim 4, wherein the first groove and the second groove are formed with minor arc openings which are opposing to each other.

6. The Bluetooth earphone of claim 3, wherein each side of the back end of the USB interface is formed with an extending part in a lateral direction, and the spring is disposed between front surfaces of the extending parts and a front end face of the upper shell.

7. The Bluetooth earphone of claim 3, wherein there are two moving assemblies which are symmetric with respect to a longitudinal central line of the upper shell.

8. The Bluetooth earphone of claim 2, wherein a blocking plate is disposed on the lower shell and spaced apart from a front end face of the lower shell by a predetermined distance to block the USB interface when the upper shell is moved from the front limit position to the back limit position relative to the lower shell and the USB interface.

9. The Bluetooth earphone of claim 2, wherein a guide groove is formed in a longitudinal side of the lower shell, and longitudinal sides of the upper shell are slidably clipped in the guide groove.

10. The Bluetooth earphone of claim 1, wherein the USB interface is slidably disposed on an inner surface of a front end of the upper shell in a longitudinal direction, wherein

the USB interface is spring out from the front opening and positioned by the moving assembly under a first backward external force, and

the USB interface is retracted to the cavity by the moving assembly under a second forward external force.

11. The Bluetooth earphone of claim 10, wherein the moving assembly comprises:

a sliding groove formed in the inner surface of the upper shell, in which a front V-shaped opening facing forwards is formed in a front end of the sliding groove, and a back V-shaped opening facing backwards is formed in a back end of the sliding groove;

a connecting rod with a first end thereof connected with a back end of the USB interface and a second end thereof sliding in the sliding groove in unidirectional circular manner;

a blocking plate fixed on the inner surface of the upper shell and spaced apart from a front end face of the upper shell by a predetermined distance; and

a spring disposed between the blocking plate and a back end face of the USB interface to push the USB interface to move forwards or backwards relative to the upper shell.

12. The Bluetooth earphone of claim 11, wherein the sliding groove comprises:

a first groove; and a second groove with a back end thereof connected with the first groove through the back V-shaped opening and a front end thereof connected with the first groove through the front V-shaped opening.

13. The Bluetooth earphone of claim 12, wherein each of the first groove and the second groove is formed into a straight groove.

14. The Bluetooth earphone of claim 13, wherein the first groove and the second groove are formed with minor arc openings which are opposing to each other.

15. The Bluetooth earphone of claim 11, wherein the moving assembly is disposed on a longitudinal central line of the upper shell.

16. The Bluetooth earphone of claim 10, wherein each side of the back end of the USB interface is formed with an extending part in a lateral direction such that the lateral width of the back end of the USB interface is larger than the width of the opening of the cavity.

17. The Bluetooth earphone of claim 10, wherein a guide groove is formed in a longitudinal side of the lower shell, and longitudinal sides of the upper shell are slidably clipped in the guide groove.

18. The Bluetooth earphone of claim 10, further comprising a plug to seal the front opening of the cavity.