Earphone

Abstract

The application discloses an earphone (100), comprising: a first earphone unit (110) and a second earphone unit (120), the first earphone unit (110) being provided with a first external contact (114), the second earphone unit (120) being provided with a second external contact (124); the first external contact (114) is connected with an output end of a first power amplifier (112) in the first earphone unit (110), and the second external contact (124) is connected with an input end of a second power amplifier (122) in the second earphone unit (120); under the condition that the first external contact (114) is connected with the second external contact (124), the first power amplifier (112) and the second power amplifier (122) are cascaded, and the earphone (100) can work in a second mode; and in the second mode, the first power amplifier (112) and the second power amplifier (122) which are cascaded are used for amplifying a first audio signal in the first earphone unit (110) step by step and outputting a first audio two-stage amplified signal to a second loudspeaker (123) in the second earphone unit (120). Therefore, the playing volume of the earphone can be improved, and the earphone is not limited to the scene that the earphone is worn on the ear.

Description

Technical Field

[0001] The present application belongs to the field of electronic technology, and specifically relates to a headset. Background Art

[0002] Headphones are electronic devices that convert audio signals into sound, and have two headphone units, namely a left headphone unit and a right headphone unit. The volume of a single headphone unit is small, so that headphones are usually limited to the scene of wearing on the ears. Summary of the invention

[0003] The present application aims to provide an earphone to increase the volume of the earphone so that the earphone is not limited to being worn on the ear.

[0004] An embodiment of the present application provides an earphone (100), comprising: a first earphone unit (110) and a second earphone unit (120); The first earphone unit (110) is provided with a first external contact (114), and the second earphone unit (120) is provided with a second external contact (124); the first external contact (114) is connected to the output end of the first power amplifier (112) in the first earphone unit (110), and the second external contact (124) is connected to the input end of the second power amplifier (122) in the second earphone unit (120); When the first external contact (114) is connected to the second external contact (124), the first power amplifier (112) and the second power amplifier (122) are cascaded, and the earphone (100) can operate in a second mode; In the second mode, the cascaded first power amplifier (112) and the second power amplifier (122) are used to amplify the first audio signal in the first earphone unit (110) step by step, and output the first audio two-stage amplified signal to the second speaker (123) in the second earphone unit (120).

[0005] In an embodiment of the present application, external contacts are respectively provided for the two earphone units. When the external contacts of the two earphone units are connected to each other, the power amplifiers in the two earphone units can be cascaded. The cascaded power amplifiers can increase the power amplification factor of the first audio signal, thereby increasing the playback volume of the second speaker. Thus, the earphones can play sound externally, which can be applied to sound external playback scenarios.

[0006] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of an internal circuit of a headset according to the related art; Figure 2 is a schematic diagram of the appearance of an earphone according to an embodiment of the present application; Figure 3 is a connection diagram of headphones according to an embodiment of the present application; Figure 4 is a schematic diagram of an internal circuit of a headset according to an embodiment of the present application; Figure 5 is another internal circuit schematic diagram of an earphone according to an embodiment of the present application; Figure 6 is a schematic diagram of the working principle of the first power amplifier of the headset according to an embodiment of the present application; Figure 7 This is another internal circuit diagram of the earphone provided in an embodiment of the present application.

[0008] Reference numerals: 100-headphone; 110-first headphone unit; 111-first audio receiver; 112-first power amplifier; 113-first speaker; 114-first external contact; 115-first mode switching switch; 120-second headphone unit; 121-second audio receiver; 122-second power amplifier; 123-second speaker; 124-second external contact; 125-second mode switching switch; 1231-first power speaker; 1232-second power speaker; 1233-speaker switching switch. DETAILED DESCRIPTION

[0009] Embodiments of the present invention will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0010] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0011] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0012] The earphones provided in the embodiments of the present application include but are not limited to: wired earphones and wireless earphones, and the wireless earphones include but are not limited to: Bluetooth wireless earphones. The earphones include two earphone units, and the embodiments of the present application respectively set external contacts for the two earphone units. When the external contacts of the two earphone units are connected to each other, the power amplifiers in the two earphone units can be cascaded, and the cascaded power amplifiers can increase the power amplification factor of the first audio signal, so that the playback volume of the second speaker is increased, so that the earphones can play sound externally, which can be applied to the sound external playback scene.

[0013] The first audio signal is an audio signal received by the first earphone unit, or an audio signal obtained by the first earphone unit after preliminary processing of the received audio signal. For example, the first audio signal may be an audio signal received and output by an audio receiver in the first earphone unit, or may be an audio signal output by an audio processing circuit such as an audio IC (Integrated Circuit) in the first earphone unit after preliminary processing of the received audio signal.

[0014] Combine the following Figure 1-Figure 7 , the earphones provided in the embodiments of the present application are described in detail.

[0015] See also Figure 1 , is a schematic diagram of an internal circuit of a headset according to the related art. Figure 1 As shown, the earphone 100 according to the related art includes: a first earphone unit 110 and a second earphone unit 120. The first earphone unit 110 includes: a first audio receiver 111, a first power amplifier 112 and a first speaker 113. The second earphone unit 120 includes: a second audio receiver 121, a second power amplifier 122 and a second speaker 123.

[0016] The first audio receiver 111 is used to receive a first audio signal and output the first audio signal to the first power amplifier 112. The first power amplifier 112 is used to amplify the first audio signal and output a first audio amplification signal to the first speaker 113. The first speaker 113 is used to convert the first audio amplification signal into sound output.

[0017] The second audio receiver 121 is used to receive a second audio signal and output the second audio signal to the second power amplifier 122. The second power amplifier 122 is used to amplify the second audio signal and output a second audio amplified signal to the second speaker 123. The first speaker 123 is used to convert the first audio amplified signal into sound output.

[0018] The inventors of the present application discovered during the process of implementing the invention of the present application that in the above-mentioned earphones 100, the first earphone unit 110 and the second earphone unit 120 operate independently of each other, and the power amplification factor of the audio signal by the power amplifier in a single earphone unit is small, which makes the volume of the earphones small and limits the application scenarios.

[0019] Figure 2 This is a schematic diagram of the appearance of an earphone according to an embodiment of the present application. Figure 3 This is a connection diagram of headphones according to an embodiment of the present application. Figure 4 is a schematic diagram of an internal circuit of a headset according to an embodiment of the present application. Figure 2 , Figure 3 , Figure 4 In order to increase the volume of the earphone and expand the application scenarios of the earphone, the earphone 100 according to the embodiment of the present application is Figure 1 On the basis of the earphone 100 shown, a first external contact 114 is further provided on the first earphone unit 110, and a second external contact 124 is further provided on the second earphone unit 120. The first external contact 114 is connected to the output end of the first power amplifier 113. The second external contact 124 is connected to the input end of the second power amplifier 123.

[0020] When the first external contact 114 is connected to the second external contact 124 , the first power amplifier 113 is cascaded with the second power amplifier 124 , and the earphone can operate in the second mode.

[0021] The second mode is different from the classic headphone playing mode. The classic headphone playing mode is usually a bass playing mode, that is, a built-in playing mode, while the second mode is, for example, an external playing mode.

[0022] In the second mode, the cascaded first power amplifier 112 and the second power amplifier 122 are used to amplify the first audio signal in the first earphone unit step by step, and output the first audio two-stage amplified signal to the second speaker 123 in the second earphone unit 120.

[0023] Specifically, in the second mode, the first audio receiver 111 can receive an audio signal and output a first audio signal to the first power amplifier 112. The first power amplifier 112 amplifies the first audio signal and outputs the first audio amplification signal to the first external contact 114. The first audio amplification signal is input to the second power amplifier 122 through the first external contact 114 and the second external contact 124 connected to the first external contact. The second power amplifier 122 amplifies the first audio amplification signal again and outputs a first audio two-stage amplification signal to the second speaker 123. The second speaker 123 converts the first audio two-stage amplification signal into sound output.

[0024] According to the earphone 100 of the embodiment of the present application, since the first audio two-stage amplified signal input to the second speaker 123 has undergone two-stage power amplification by the first power amplifier 112 and the second power amplifier 122, its amplification factor is significantly improved. The first audio two-stage amplified signal obtained by the two-stage amplification is input into the second speaker 123, which can significantly increase the playback volume of the second speaker 123. Therefore, the earphone 100 can be used as an external player and can be used without being worn on the ears.

[0025] In the embodiment of the present application, the connection between the first external contact 114 and the second external contact 124 is an electrical connection, which can form a signal path between the first external contact 114 and the second external contact 124. The connection includes but is not limited to a fixed connection, a movable connection, and the like.

[0026] Optionally, the first external contact 114 and the second external contact 124 are movably connected. When the first external contact 114 and the second external contact 124 are not connected, the earphone 100 can operate in a first mode. The first mode is the original normal mode of the earphone, which is, for example, the classic bass mode of the earphone, that is, the internal speaker mode.

[0027] In the first mode, the first power amplifier 112 is used to amplify the first audio signal in the first earphone unit 110, and output the first audio amplified signal to the first speaker 113 in the first earphone unit 110; the second power amplifier 122 is used to amplify the second audio signal in the second earphone unit 120, and output the second audio amplified signal to the second speaker 123 in the second earphone unit 120. The first earphone unit 110 and the second earphone unit 120 can work independently of each other.

[0028] Specifically, in the first mode, when the first earphone unit 110 is working, the first audio receiver 111 can receive an audio signal and output the first audio signal to the first power amplifier 112. The first power amplifier 112 can amplify the first audio signal and output the first audio amplified signal to the first speaker 113. The first speaker 113 can convert the first audio amplified signal into sound output.

[0029] In the second mode, when the second earphone unit 120 is working, the second audio receiver 121 can receive an audio signal and output the second audio signal to the second power amplifier 122. The second power amplifier 122 can amplify the second audio signal and output the second audio amplified signal to the second speaker 123. The second speaker 123 can convert the second audio amplified signal into sound output.

[0030] In the first mode, the audio signal driving the speaker in a single earphone unit is amplified only once by the power amplifier inside the single earphone unit, and its power is relatively small. Therefore, the volume of the speaker is relatively small, so that the earphone 100 can be used as a normal earphone.

[0031] According to the earphone 100 of the embodiment of the present application, the first external contact 114 and the second external contact 124 are movably connected, which expands the application scenario of the earphone. The earphone 100 can work in the second mode such as the external speaker mode and be used as an external speaker player, and can also work in the second mode such as the classic bass mode and be used as a normal earphone.

[0032] In the embodiment of the present application, the first external contact 114 and the second external contact 124 can be movably connected in an appropriate manner.

[0033] Optionally, the first external contact 114 may be a retractable contact, which is used to be operated to connect with the second external contact 124. Alternatively, the second external contact 124 may be a retractable contact, which is used to be operated to connect with the first external contact 114.

[0034] The retractable contact may be a suitable retractable structure.

[0035] For example, a contact may be provided at a retractable end of a stretchable connecting wire to form the retractable contact. A user may stretch the stretchable connecting wire to connect the first external contact 114 with the second external contact 124. For another example, a contact may be provided at a rotatable end of a rotating connecting rod to form the retractable contact. A user may rotate the rotatable connecting rod to connect the first external contact 114 with the second external contact 124.

[0036] Optionally, the earphone 100 may further include: a connecting component, wherein the connecting component is configured to be operated to connect the first external contact with the second external contact.

[0037] Among them, the connecting component can be an appropriate connecting structure, such as a connecting rod, a connecting wire, etc., as long as it can electrically connect the first external contact 114 with the second external contact 124 to form a signal path between the first external contact 114 and the second external contact 124, and this application is not limited to this.

[0038] For example, the connection component may be a wire, and the user may connect one end of the wire to the first external contact 114 and the other end to the second external contact 124, thereby connecting the first external contact 114 to the second external contact 124. For another example, the connection component may be an electrical connection rod, and the user may connect one end of the electrical connection rod to the first external contact 114 and the other end to the second external contact 124, thereby connecting the first external contact 114 to the second external contact 124.

[0039] In the embodiment of the present application, the headset 100 can be controlled to operate in the first mode or the second mode in an appropriate manner.

[0040] For example, when the first external contact 114 is not connected to the second external contact 124, the first power amplifier 112 can be controlled to selectively output the first audio amplified signal to the first speaker 113, and the second power amplifier 122 can be controlled to selectively output the second audio amplified signal to the second speaker 123, so that the headset 100 operates in the first mode. When the first external contact 114 is connected to the second external contact 124, the first power amplifier 112 can be controlled to selectively output the first audio amplified signal to the first external contact 114, and the second power amplifier can be controlled to selectively input the first audio amplified signal input by the second external contact 124, so that the headset 100 operates in the second mode.

[0041] Figure 5 is another schematic diagram of the internal structure of the earphone according to the embodiment of the present application. Figure 5 Optionally, in order to make the earphone 100 work in the first mode or the second mode, in the earphone 100 according to the embodiment of the present application, the connection between the first external contact 114 and the output end of the first power amplifier is an indirect connection, and the first earphone unit 110 further includes: a first mode switching switch 115, the input end of the first mode switching switch 115 is connected to the output end of the first power amplifier 112, and the output end of the first mode switching switch 115 is respectively connected to the input end of the first speaker 113 and the first external contact 114. The connection between the second external contact 124 and the input end of the second power amplifier is an indirect connection, and the second earphone unit 120 further includes: a second mode switching switch 125, the input end of the second mode switching switch 125 is respectively connected to the second external contact 124 and the output end of the second audio receiver 121, and the output end of the second mode switching switch 125 is connected to the input end of the second power amplifier 122.

[0042] In response to the first mode instruction, the first mode switching switch 115 connects the output end of the first power amplifier 112 with the input end of the first speaker 113, and disconnects the output end of the first power amplifier 112 from the first external contact 114, and the second mode switching switch 125 connects the output end of the second audio receiver 121 with the input end of the second power amplifier 122, and disconnects the second external contact 124 from the input end of the second power amplifier 122. Thus, the headset 100 can work in the first mode.

[0043] In response to the second mode instruction, the first mode switching switch 115 connects the output end of the first power amplifier 112 to the first external contact 114, disconnects the output end of the first power amplifier 112 from the input end of the first speaker 113, and the second mode switching switch 125 connects the second external contact 124 to the input end of the second power amplifier 122, disconnects the output end of the second audio receiver 121 from the input end of the second power amplifier 122. Thus, the headset 100 can work in the second mode.

[0044] The first mode instruction and the second mode instruction may be sent by a control terminal such as a mobile phone. The control terminal may send instructions to the headset according to appropriate operations. In one embodiment, the control terminal may send the first mode instruction or the second mode instruction to the headset 100 according to the mode switching operation of the user. In one embodiment, the control terminal may send the first mode instruction or the second mode instruction to the headset 100 in response to the disconnection or connection of the first external contact with the second external contact.

[0045] For example, according to the operation of switching to the second mode performed by the user on the control terminal, the control terminal may send the second mode instruction to the headset 100. In response to the second mode instruction, the first mode switching switch 115 may connect the output end of the first power amplifier 112 to the first external contact 114, and the second mode switching switch 125 may connect the second external contact 124 to the input end of the second power amplifier 122, so that the headset 100 can work in the second mode.

[0046] For another example, in response to the connection between the first external contact 114 and the second external contact 124, the control terminal may send the second mode instruction to the headset 100. In response to the second mode instruction, the first mode switching switch 115 may connect the output end of the first power amplifier 112 to the first external contact 114, and the second mode switching switch 125 may connect the second external contact 124 to the input end of the second power amplifier 122, so that the headset 100 can operate in the second mode.

[0047] According to the earphone 100 of the embodiment of the present application, a mode switching switch is further set in the first earphone unit 110 and the second earphone unit 120. The mode switching of the earphone 100 is controlled by the mode switching switch, so that the original earphone module can be reused without making too many changes to the original earphone module.

[0048] In the embodiment of the present application, the first power amplifier and the second power amplifier are both audio power amplifiers, and the first power amplifier may be a smart power amplifier (Smart PA). When the smart power amplifier is working, it compares the input audio signal with the sawtooth wave generated by the smart power amplifier itself, and outputs PWM signals with different pulse widths. Its working principle is as follows: Figure 6 shown.

[0049] Combination Figure 6 It can be seen that, in the earphone 100 according to the embodiment of the present application, the first audio amplification signal can be a discrete PWM signal, and the second audio signal is a continuous analog audio signal. In order to further increase the volume of the earphone in the second mode, in the earphone 100 according to the embodiment of the present application, the second power amplifier 122 can adopt a multi-mode power amplifier, which is used to amplify the PWM signal and the analog audio signal. It can amplify the second audio signal which is the analog audio signal, and can also amplify the first audio amplification signal which is the PWM signal. Moreover, the multi-mode power amplifier amplifies the PWM signal at a much higher multiple than the analog audio signal.

[0050] According to the earphone 100 of the embodiment of the present application, the second power amplifier 122 adopts a multi-mode power amplifier, which can re-amplify the first audio amplified signal by a larger multiple in the second mode, so that the earphone volume can be further improved.

[0051] To further increase the volume of the earphone in the second mode, in the earphone 100 according to the embodiment of the present application, the second speaker 123 in the second earphone unit 120 may specifically include a first power speaker and a second power speaker. The power of the second power speaker is greater than the power of the first power speaker. For example, the first power speaker may be a small speaker, and the second power speaker may be a large speaker, which may have a higher volume than the first power speaker.

[0052] In the first mode, the second power amplifier 122 can selectively output the second audio amplified signal to the first power speaker. In the second mode, the second power amplifier 122 can selectively output the first audio two-stage amplified signal to the second power speaker. Thus, it is possible to use an adapted speaker in different modes.

[0053] Figure 7 is another internal circuit diagram of the earphone 100 according to an embodiment of the present application. Figure 7According to the embodiment of the present application, the second speaker 123 in the headset 100 specifically includes: a first power speaker 1231, a second power speaker 1232, and a speaker switching switch 1233. The input end of the speaker switching switch 1233 is connected to the output end of the second power amplifier 122, and the output end of the speaker switching switch 1233 is connected to the input end of the first power speaker 1231 and the input end of the second power speaker 1232 respectively.

[0054] In the first mode, the speaker switching switch 1233 connects the output end of the second power amplifier 122 to the input end of the first power speaker 1231, and disconnects the output end of the second power amplifier 122 from the input end of the second power speaker 1232, so that the sound is played by the first power speaker 1231.

[0055] In the second mode, the speaker switching switch 1233 can connect the output end of the second power amplifier 122 to the input end of the second power speaker 1231, and disconnect the output end of the second power amplifier 122 from the input end of the first power speaker 1232, so that the sound is played by the second power speaker 1232.

[0056] According to an embodiment of the present application, the earphone 100 uses a higher-power second-power speaker to play sound in a second mode such as an external speaker mode, which can further increase the playback volume. Thus, the earphone 100 can be better used as an external speaker or even as a speaker.

[0057] Other structures and operations of the earphone 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A headset (100), comprising: The first earphone unit (110) and the second earphone unit (120) are characterized in that: The first earphone unit (110) is provided with a first external contact (114), and the second earphone unit (120) is provided with a second external contact (124); the first external contact (114) is connected to the output end of the first power amplifier (112) in the first earphone unit (110), and the second external contact (124) is connected to the input end of the second power amplifier (122) in the second earphone unit (120); When the first external contact (114) is connected to the second external contact (124), the first power amplifier (112) and the second power amplifier (122) are cascaded, and the earphone (100) can operate in a second mode; In the second mode, the cascaded first power amplifier (112) and the second power amplifier (122) are used to amplify the first audio signal in the first earphone unit (110) step by step, and output the first audio two-stage amplified signal to the second speaker (123) in the second earphone unit (120).

2. The earphone (100) according to claim 1, characterized in that The first external contact (114) and the second external contact (124) are movably connected; When the first external contact (114) and the second external contact (124) are not connected, the headset (100) can operate in a first mode; In the first mode, the first power amplifier (112) is used to amplify the first audio signal in the first earphone unit (110), and output the first audio amplification signal to the first speaker (113) in the first earphone unit (110); the second power amplifier (122) is used to amplify the second audio signal in the second earphone unit (120), and output the second audio amplification signal to the second speaker (123) in the second earphone unit (120).

3. The earphone (100) according to claim 2, characterized in that The first external contact (114) is a retractable contact, which is used to be operated to connect with the second external contact (124); or The second external contact (124) is a retractable contact, which is used to be operated to connect with the first external contact (114).

4. The earphone (100) according to claim 2, characterized in that The earphone (100) further includes: A connecting component is used to be operated to connect the first external contact (114) with the second external contact (124).

5. The earphone (100) according to claim 2, characterized in that In the second mode, the first power amplifier (112) is used to amplify the first audio signal and output a first amplified audio signal to the second power amplifier (122), wherein the first amplified audio signal comprises: a PWM signal; In the first mode, the second audio signal comprises: an analog audio signal; The second power amplifier includes: a multi-mode power amplifier, which is used to amplify the PWM signal and the analog audio signal; the multi-mode power amplifier amplifies the PWM signal at a greater multiple than the multi-mode power amplifier amplifies the analog audio signal.

6. The earphone (100) according to claim 2, characterized in that The first earphone unit (110) comprises: a first mode switching switch (115), the input end (115) of the first mode switching switch being connected to the output end of the first power amplifier (112), and the output end of the first mode switching switch (115) being connected to the input end of the first speaker (113) and the first external contact (114) respectively; The second earphone unit (120) comprises: a second mode switching switch (125), the input end of the second mode switching switch (125) being respectively connected to the second external contact (124) and the output end of the second audio receiver (121) in the second earphone unit, and the output end of the second mode switching switch (125) being connected to the input end of the second power amplifier (122).

7. The earphone (100) according to claim 6, characterized in that In response to a first mode instruction, the first mode switching switch (115) connects the output end of the first power amplifier (112) to the input end of the first speaker (113), and disconnects the output end of the first power amplifier (112) from the first external contact (114); the second mode switching switch (125) connects the output end of the second audio receiver (121) to the input end of the second power amplifier (122), and disconnects the second external contact (124) from the input end of the second power amplifier (122).

8. The earphone (100) according to claim 6, characterized in that In response to a second mode instruction, the first mode switching switch (115) connects the output end of the first power amplifier (112) to the first external contact (114), disconnecting the output end of the first power amplifier (112) from the input end of the first speaker (113); the second mode switching switch (125) connects the second external contact (124) to the input end of the second power amplifier (122), disconnecting the output end of the second audio receiver (121) from the input end of the second power amplifier (122).

9. The earphone (100) according to claim 8, characterized in that The second mode instruction is sent by the control terminal of the headset in response to the user's second mode switching operation; or The second mode instruction is sent by the control terminal of the headset in response to the connection between the first external contact (114) and the second external contact (124).

10. The earphone (100) according to claim 2, characterized in that The second speaker (123) comprises: a first power speaker (1231), a second power speaker (1232) and a speaker switching switch (1233); the input end of the speaker switching switch (1233) is connected to the output end of the second power amplifier (122), and the output end of the speaker switching switch (1233) is respectively connected to the input end of the first power speaker (1231) and the input end of the second power speaker (1232); the power of the second power speaker (1232) is greater than that of the first power speaker (1231); In the first mode, the speaker switching switch (1233) connects the output end of the second power amplifier (122) to the input end of the first power speaker (1231), and disconnects the output end of the second power amplifier (122) from the input end of the second power speaker (1232); In the second mode, the speaker switching switch (1233) connects the output end of the second power amplifier to the input end of the second power speaker (1232), and disconnects the output end of the second power amplifier (122) from the input end of the first power speaker (1231).

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