CN201319658Y - Earphone with sound box function - Google Patents

Abstract

The utility model discloses an earphone with audio amplifier function. The earphone at least comprises two ear muffs, wherein each ear muff is internally provided with a loudspeaker and a lead with a plug, and the lead is electrically connected with the loudspeakers in the two ear muffs; the lead is provided with an audio power amplifier which is electrically connected between the plug and the two loudspeakers; and a switch for switching different audio output power signals to the two speakers. By adopting the above structure, the utility model, it retrencies and light to have structural design, can realize switching immediately between earphone and the audio amplifier function through an earphone product, easy operation and convenient to carry can save consumer's purchase cost again.

Description

Headphones with speaker function

technical field

The utility model relates to an earphone, in particular to an earphone with the function of a sound box.

Background technique

Both earphone speakers and speakers contain speakers, which are sound-generating devices that convert audio signals into sound. The earphones are small and exquisite, have low power and low sound, and are often hung on the ear or worn on the head to stick to the ear hole during use. The speaker is large in size, high in power, loud in sound, and can produce very contagious stereo sound, etc.

With the diversification and improvisation of people's taste needs, the enjoyment of music and other sounds may have different situational requirements according to the improvisational needs, such as listening to headphones for a while, and immediately want to listen to speakers for a while; even the same song, this I want to listen to the first paragraph with headphones, and I want to listen to the next paragraph with speakers. At present, there is a converter for earphones and speakers on the market. The plugs of the earphones and speakers are plugged into the converter, and the switch between the earphones and the speakers can be realized by operating the switch. The occasion of these two kinds of equipments of sound box and loudspeaker still can not satisfy people's demand.

Chinese patent 200620137507.2, a stereo earphone that can be used as a speaker, and 200620157870.0, an external loudspeaker earphone all disclose a headset with the functions of an earphone and a speaker, but all are by setting two sets of speakers on the earphone, namely a One set realizes the earphone function and the other one realizes the speaker function. In this way, the weight of the earphone will inevitably be increased, which will increase the burden on the head when people use it, and lack comfort.

Contents of the invention

The purpose of the utility model is to provide an earphone with the function of a sound box in view of the deficiencies of the prior art, which can realize the random switching between the functions of the earphone and the sound box through a set of speakers.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the earphone with the function of a sound box includes at least two earmuffs, each earmuff has a built-in speaker, and a lead wire with a plug is electrically connected to the speakers in the two earmuffs; An audio power amplifier is arranged on the lead wire, which is electrically connected between the plug and the two speakers; and a switch is used to switch different audio output power signals to the two speakers.

The above-mentioned connectors can be RCA audio plugs equipped with conventional earphones. For an audio output device (such as a host computer) with a USB interface and the USB interface has an audio output function, the above-mentioned plug can be a USB plug, and a USB audio signal conversion interface is connected in series between the USB plug and the audio power amplifier. superior. The digital audio signal generated by the audio output device is transmitted to the USB audio conversion interface through the USB plug. The USB audio conversion interface converts the digital audio signal into an analog audio signal, and then outputs it to the speaker through the analog audio power amplifier. At this time, the earphone The function of the speaker is speaker mode, which has the characteristics of higher power and louder sound; and in order to make the function of the earphone into the earphone mode, that is, the speaker output power is small and the sound is low, the switch is used to switch between different audio output powers. To the speaker, there are many ways, such as through an attenuator, or the audio power amplifier has a magnification of one, or the input of the speaker is directly connected to the audio output of the USB audio conversion interface, and so on.

The main function of the switch is to switch different audio output power signals to the two speakers. Therefore, the switch can achieve the purpose of switching out different audio output powers by enabling and disabling the audio power amplifier. And this changeover switch also can be the slide switch of a mechanical structure, or a button switch, or the switch of a rotary mechanical structure with volume adjustment function.

As a preference, audio signal processing electronic parts such as audio power amplifier and USB audio conversion interface described in the utility model can be arranged in any earmuff; Audio signal processing electronic components are packaged in it; further, the switch can also be set in the package box or any earmuff. In order to enable users to use the utility model more flexibly, the covering box may contain a jack, which is an audio input interface for connecting an external audio signal source. When an audio output connector for an external audio signal source is connected to the When the audio input interface is used, all connections in the original circuit of the earphone with the audio output terminals of the USB audio conversion interface are switched to the audio input interface. In order to enable the utility model to have greater audio output power when it is in the speaker mode, the cladding box can be provided with a jack again, which is a power input interface for connecting an external power supply that can supply power to the audio power amplifier, so that the audio The power amplifier has a larger output power.

In addition to the conventional ear-hook earphone structure, the utility model can further include a headband, and two earmuffs are respectively connected to the two ends of the headband to form a headphone structure. Furthermore, the two earmuffs can be connected to the headband through a rotating connection mechanism or a detachable connection structure, so that the two earmuffs can be rotated or separated relative to the headband to meet the needs of the earphone mode and the speaker mode. And the headband can be a foldable or detachable headband, that is, a folding structure or a detachable structure is set at any position of the headband body (preferably the middle part of the headband body) so that the headband forms two opposite As for the moving part, the relative movement between the two parts respectively drives one earmuff to move so that the relative spatial position of the two earmuffs changes, so as to meet the needs of the earphone mode and the speaker mode. In order to facilitate the automatic operation of the switching switch, the switching switch can be linked with the above-mentioned rotating connection mechanism or detachable connection mechanism between the earmuffs and the headband, or the folding structure or detachable structure on the headband.

Further, a ventilation hole can be respectively provided on the shell wall behind the above two earmuffs, and a Helmholtz resonator of a transmission line speaker can be formed in the inner cavity of the earmuffs; or a sound-absorbing material can be filled in the inner cavity of the earmuffs to obtain better sound quality.

By adopting the above-mentioned structure, the utility model has a simple and light structural design, can realize the random switching between the functions of the earphone and the sound box through one earphone product, is easy to operate and carry, and can save the purchase cost of consumers.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2a and Fig. 2b are respectively a kind of circuit principle diagram of the utility model embodiment 1;

Fig. 3a, Fig. 3b and Fig. 3c are respectively a kind of use state diagram of embodiment 1 of the present utility model;

Fig. 4a, Fig. 4b, Fig. 4c and Fig. 4d are respectively a kind of use state diagram of embodiment 2 of the present utility model;

Fig. 5 is the structural representation of the utility model embodiment 3;

Fig. 6a and Fig. 6b are respectively a kind of circuit principle diagram of the utility model embodiment 3;

Fig. 7 is the structural representation of the utility model embodiment 4;

Fig. 8 is the structural representation of the utility model embodiment 5;

Fig. 9 is a schematic structural view of the earmuffs of the present invention.

In the picture:

1-lead wire; 11-plug; 2-earmuff; 21-air vent; 22-Helmholtz resonator; 23-sound-absorbing material; 3-speaker; 4-headband; 41-connector; 5-package box; 51-jack/power input interface; 52-external power supply; 6-audio power amplifier; 7-USB audio conversion interface; 8-switch.

Now in conjunction with accompanying drawing and embodiment the utility model is described further.

Detailed ways

Example 1

As shown in Fig. 1, the earphone with sound box function described in the utility model is mainly made up of headband 4, two earmuffs 2 and the lead wire 1 of one band plug 11: each earmuff 2 is respectively connected to by a connector 41 The two ends of the headband 4, and each earmuff 2 has a built-in speaker 3; the lead wire 1 is electrically connected to the speaker 3, and the plug 11 on one end is a USB plug, and a package box 5 is arranged on the line body, A USB audio conversion interface 7, a switch 8 and an audio power amplifier 6 are sequentially arranged in the parcel box, and a USB plug, a USB audio conversion interface 7, a switch 8, an audio power amplifier 6 and a loudspeaker 3 form the working circuit part of the present utility model. The principle of the working circuit is shown in Figure 2a and Figure 2b. The principle of switching between the functions of the earphone and the sound box of the present invention will be set forth below through the principle of the circuit.

Fig. 2 a shows a kind of circuit structure principle of the present embodiment: when the switch (the switch can be a button switch or a slide switch) is switched to the sound box mode, the audio output device (the USB interface on it needs to have audio The digital audio signal generated by the output function) is transmitted to the USB audio conversion interface through the USB plug, and the digital-to-analog converter DAC inside the USB audio conversion interface converts the digital audio signal into an analog audio signal, and then amplifies it through an analog audio power amplifier Output to the speaker. At this time, the sound output by the speaker has the characteristics of a speaker with higher power and louder sound; when the switch is switched to the headphone mode, the analog audio signal output by the USB audio conversion interface is directly processed by the audio power amplifier. Output to the speaker. At this time, the sound output by the speaker has the earphone characteristics of low output power and low sound.

Fig. 2 b shows another kind of circuit structure principle of the present embodiment: USB plug, USB audio conversion interface, switch, audio power amplifier and loudspeaker are sequentially connected in series to form working circuit, and switch is used as an attenuator at this moment, also can be as Adjustable resistance, progressive switch with rotary mechanism. The digital audio signal generated by the audio output device (the USB interface on it needs to have audio output function) is transmitted to the USB audio conversion interface through the USB plug, and the digital-to-analog converter DAC inside the USB audio conversion interface converts the digital audio signal into an analog After the audio signal, adjust the attenuator so that the analog audio signal is output to the audio power amplifier at different ratios, and the audio power amplifier is also output to the speaker at different ratios. For example, when adjusting the attenuator, the output ratio of the audio power amplifier can be set When it is one, it is the headphone mode, and the appropriate reduction and increase of the output magnification is the volume adjustment function in the headphone mode; when the attenuator is adjusted to gradually increase the output magnification of the audio power amplifier to a set multiple, at this time You can hear the sound from the speaker without wearing the utility model, which is the speaker mode, and the appropriate increase of the output magnification is the volume adjustment function in the speaker mode; and the switch can be used as an adjustable resistor, audio power amplifier, USB The audio conversion interface can adjust the output of different ratios according to the adjustable resistance.

As shown in Figure 3a, Figure 3b and Figure 3c, the connection between the two earmuffs 2 and the headband 4 described in this embodiment is a rotating connection mechanism, that is, when the earmuffs 2 are rotated to form with the headband 4 When the positional relationship shown in FIG. 3 a is the earphone mode; and when the earmuff 2 is turned to form the positional relationship with the headband 4 as shown in FIG. 3 b and FIG. 3 c , it is the speaker mode. In order to automatically switch between the earphone mode and the speaker mode, the above-mentioned switch can be set on the earmuffs and can be linked with the rotating connection mechanism, that is, the rotating connection mechanism realizes that the earmuffs are in the position shown in Figure 3a When the switch is activated, the working circuit is in the headphone mode; when the rotating connection mechanism is in the position of the earmuffs as shown in Figure 3b or 3c, the switching switch is activated to make the working circuit in the speaker mode. The technology of implementing circuit control through mechanical interlocking relationship should be a known technology, and will not be repeated here.

It should be noted that the above-mentioned wrapping box is also any earmuff; and in order to enable users to use the utility model more flexibly, a jack can be set on the wrapping box or the earmuff, and the jack is an RCA audio input interface , for connecting an external audio signal source. When the audio output connector of an external audio signal source is connected to the RCA audio input interface, all connections in the original circuit of the earphone to the audio output ports of the USB audio conversion interface are switched to the RCA audio input. interface. In order to make the utility model have greater audio output power when it is in the sound box mode, the cladding box can be provided with a jack again, and the jack is a power input interface for connecting an external power supply that can supply power to the audio power amplifier. Audio power amplifiers have higher output power.

Example 2

As shown in Fig. 4a, Fig. 4b, Fig. 4c and Fig. 4d, the difference between this embodiment and Embodiment 1 is that the connecting piece 41 between the earmuff 2 and the headband 4 is specifically a joint connection structure of two cylinders. The cylindrical joint structure enables the earmuffs to rotate two-dimensionally and three-dimensionally relative to the headband, meeting different requirements for use, and can further reduce the space size of the utility model when not in use, so as to achieve the purpose of being easy to store and carry.

In addition, the connecting member may also be a combined connecting structure of a cylindrical joint and a spherical joint, and these connecting mechanisms are known technologies, and will not be described in detail here.

Example 3

As shown in Figure 5, the earphone with speaker function described in this embodiment is mainly composed of a headband 4, two earmuffs 2 and a lead wire 1 with a plug 11: each earmuff 2 is connected to the Both ends of the headband 4, and each earmuff 2 has a built-in speaker 3; the lead wire 1 is electrically connected to the speaker 3, and the plug 11 on one end is an RCA audio plug, and a package box 5 is arranged on the wire body , a switch 8 and an audio power amplifier 6 are sequentially arranged in the parcel box, and the RCA plug, the switch 8, the audio power amplifier 6 and the loudspeaker 3 form the working circuit part of the present utility model, and the working circuit principle is shown in Fig. 6a and Fig. 6b As shown, the audio power amplifier 6 in the figure needs to be powered by a power supply circuit (not shown in the figure). The principle of switching between the functions of the earphone and the sound box of the present invention will be set forth below through the principle of the circuit.

Figure 6a shows a circuit structure principle of this embodiment: when the switch (the switch can be a button switch or a slide switch) is switched to the sound box mode, the analog audio signal generated by the audio output device is passed through the RCA audio plug And the audio power amplifier is output to the switch, and the audio power amplifier amplifies the analog audio signal and outputs it to the speaker. At this time, the sound output by the speaker has the characteristics of a louder speaker with higher power; when the switch is switched to the headphone mode At this time, the analog audio signal generated by the audio output device is directly output to the speaker through the RCA audio plug and the switch. At this time, the sound output by the speaker has the earphone characteristics of low output power and low sound.

Figure 6b shows another circuit structure principle of this embodiment: the RCA audio plug, switch, audio power amplifier and speaker are connected in series to form a working circuit. At this time, the switch is used as an attenuator, and it can also be used as a rotary mechanical structure The adjustable resistance, progressive switch. After the analog audio signal generated by the audio output device is inserted into the attenuator through the RCA audio plug, adjust the attenuator so that the analog audio signal is output to the audio power amplifier at different ratios, and the audio power amplifier is also output to the speaker at different ratios. For example, it can be set that when the attenuator is adjusted so that the output magnification of the audio power amplifier is one, it is the earphone mode, and the appropriate reduction and increase of the output magnification is the volume adjustment function in the earphone mode; when the attenuator is adjusted to make the audio power When the output magnification of the amplifier gradually increases to a set multiple, the sound from the speaker can be heard without wearing the utility model at this time, which is the speaker mode, and the appropriate increase of the output magnification is the volume adjustment function in the speaker mode ; and the switching switch can be used as an adjustable resistor, and the audio power amplifier and USB audio conversion interface can be adjusted to output at different ratios according to the adjustable resistor.

The power supply circuit described in this embodiment can be a USB power supply circuit, and in order to enable the utility model to have greater audio output power when it is in the speaker mode, the cladding box can also be provided with a jack 51, which is a power supply The input interface is used for connecting an external power supply 52 that can supply power to the audio power amplifier, such as a power converter, so that the audio power amplifier can obtain a larger output power. The external power supply can also be a USB plug.

Other variable structures of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

Example 4

As shown in Figure 7, the difference between this embodiment and Embodiment 1 is that the switch 8 is a key switch, and it is arranged on one of the earmuffs 2, and its circuit implementation can be as shown in Figure 2a and Figure 6a Show. In this way, the switching function can also be implemented conveniently.

Example 5

As shown in Figure 8, the difference between this embodiment and Embodiment 1 is that the switch 8 is a switch with a rotary mechanical structure with a volume adjustment function, and it is arranged on one of the earmuffs 2, and its circuit implementation can be As shown in Figure 2b and Figure 6b. In this way, the switching function can also be implemented conveniently.

In addition, according to the connection relationship between the earmuffs and the headband and the linkage principle of the switch, the headband can also be a foldable or detachable headband, that is, it can be placed on any part of the headband body (preferably the headband). The middle part of the belt body) is provided with a folding structure or a detachable structure so that the headband forms two parts that can move relative to each other. The relative movement between the two parts respectively drives one earmuff to move so that the relative spatial position of the two earmuffs changes. , to meet the needs of the earphone mode and the speaker mode; the folding structure or the detachable structure can also be linked with the switching switch to achieve the purpose of automatically switching the earphone working mode.

Also, as shown in Figure 9, a ventilation hole 21 can be respectively provided on the shell wall behind the earmuff 2 described in the present utility model, and a Helmholtz of a transmission line type sound box is formed in the inner cavity of the earmuff. (Helmholtz) resonator structure 22, the cross-section side of the transmission line is viewed as a concentric ring shape centered on the axial direction of the vent hole, such as a concentric circle or an ellipse; and the sound-absorbing material 23 is filled in the inner cavity of the earmuff to obtain better sound quality Effect.

The above descriptions are only preferred embodiments of the present utility model, and do not limit the technical scope of the present utility model in any way. Under the enlightenment of this technical solution, technicians in this industry can make some deformations and modifications, such as the specific structure of the switch, the specific structure of the automatic switch, the specific installation position of the circuit board, the specific structure of the power amplifier circuit, etc. Any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still belong to the protection scope of the utility model.

Claims (23)

1, has the earphone of function of loudspeaker box, comprise at least

Two earmuffs, the built-in loudspeaker of each earmuff, and

The lead-in wire of one band plug, the loudspeaker electric connection with in two earmuffs is characterized in that described lead-in wire is provided with

One audio-frequency power amplifier is electrically connected between plug and two loudspeaker; And

One switches switch, in order to switch different sound output signal to two loudspeaker.

2, earphone according to claim 1 is characterized in that, described plug is a USB plug, and has a USB audio signal translation interface to be serially connected on the lead-in wire between USB plug and the audio power power amplifier.

3, earphone according to claim 2 is characterized in that, described diverter switch directly is connected with the output electric property of USB audio conversion interface at loudspeaker, and loudspeaker with switch between the output electric property of audio-frequency power amplifier is connected.

4, earphone according to claim 1 is characterized in that, described diverter switch starts and closes this audio-frequency power amplifier.

5, earphone according to claim 1 is characterized in that, described diverter switch is the slide switch of a mechanical structure, or a key switch, or a tool volume is adjusted the switch of the rotating machinery structure of function.

6, earphone according to claim 1 is characterized in that, described diverter switch is an attenuator, is serially connected on the lead-in wire between plug and the audio-frequency power amplifier.

7, earphone according to claim 1 is characterized in that, a parcel box in order to the parcel audio-frequency power amplifier is arranged.

8, earphone according to claim 2 is characterized in that, a parcel box in order to parcel audio-frequency power amplifier and USB audio signal translation interface is arranged.

According to claim 7 or 8 described earphones, it is characterized in that 9, described diverter switch is arranged in this parcel box.

According to claim 7 or 8 described earphones, it is characterized in that 10, described coating box contains a jack, this jack can be powered to the additional power source of audio-frequency power amplifier for connecting.

According to claim 7 or 8 described earphones, it is characterized in that 11, described coating box contains a jack, this jack is for being connected to the audio signal source that adds that audio-frequency power amplifier provides audio signal.

12, earphone according to claim 2 is characterized in that, described audio-frequency power amplifier and USB audio signal translation interface are arranged in arbitrary earmuff.

According to claim 1 or 2 or 12 described earphones, it is characterized in that 13, described diverter switch is a key switch, or the switch of the rotating machinery structure of tool volume adjustment function, place on the lateral surface of arbitrary earmuff.

14, earphone according to claim 1 is characterized in that, a headband is arranged, and described two earmuffs are connected to the two ends of headband.

15, earphone according to claim 14 is characterized in that, described two earmuffs are connected in the two ends of headband respectively by a rotational coupling mechanism.

16, earphone according to claim 14 is characterized in that, described two earmuffs are connected in the two ends of headband by a separate type syndeton.

17, according to claim 15 or 16 described earphones, it is characterized in that the bindiny mechanism's interlock between described diverter switch and earmuff and the headband.

18, earphone according to claim 14 is characterized in that, described headband is a collapsible or detachable headband.

19, earphone according to claim 18 is characterized in that, described diverter switch and collapsible and/or detachable headband interlock.

20, earphone according to claim 1 is characterized in that, the face shell wall is respectively equipped with an air vent hole after described two earmuffs, and constitutes the Hull Mu Huozi resonator of a transmission line formula audio amplifier in the earmuff inner chamber.

21, earphone according to claim 20 is characterized in that, the section side-looking of described transmission line is for axially being the concentric ring shape at center with air vent hole.

22, earphone according to claim 1 is characterized in that, described earmuff inner chamber is filled sound-absorbing material.

23, earphone according to claim 10 is characterized in that, described plug is the RCA audio jack, and described additional power source is a power supply changeover device, or USB plug.

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