Sound box system with external passive sound box

Abstract

The utility model discloses a sound box system with external passive sound boxes, which comprises a host sound box, an audio cable, a first external sound box and a second external sound box, the host sound box comprises a power amplifier and a built-in loudspeaker, and a left sound channel signal and a right sound channel signal of the power amplifier are output to the built-in loudspeaker. The host loudspeaker box further comprises a first audio output interface and a second audio output interface, and when the first external loudspeaker box is connected to the first audio output interface through an audio line, a left sound channel signal of the power amplifier is converted and output to a loudspeaker of the first external loudspeaker box. And when the second external sound box is inserted into the second audio output interface through the audio line, the right sound channel signal of the power amplifier is converted and output to the loudspeaker of the second external sound box, so that the stereophonic effect can be achieved at low cost. The first external sound box and the second external sound box do not comprise a power supply and a power amplifier, and are powered by the power supply of the host sound box, so that the movement convenience of the sound box system can be enhanced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of audio equipment, in particular to a sound box system with an external passive sound box. Background Art

[0002] The existing small speakers on the market, such as small Bluetooth speakers and WiFi smart speakers, have three technical limitations: First, from the perspective of a single speaker, no matter how many speakers it has, it cannot play stereo, or cannot play very good stereo; second, due to its small size and sound cavity, only small-diameter speakers can be used, so the sound quality is usually average, and it is difficult to achieve the same sound quality as speakers with larger-diameter speakers; third, there are usually only small-signal audio input interfaces with a power of no more than 60mW, and very few have small-signal audio output interfaces, and the output signal needs to be amplified by another power amplifier before it can drive the speaker to make sound.

[0003] Due to the three technical limitations of the above-mentioned small speakers, if a user already has a small speaker and wants good stereo and better sound quality, he can use an additional speaker with power supply and amplifier, including left and right speakers, and with a relatively larger speaker diameter; if the user already has a speaker with a relatively large speaker diameter, relatively good sound quality, and wireless stereo function, he can also add another speaker of the same kind. These two technical solutions generated by the three technical limitations of the above-mentioned small speakers will increase the user's usage costs. Utility Model Content

[0004] The utility model aims to solve the technical problem of reducing the cost of a speaker and achieving better stereo sound quality, and proposes a speaker system with an external passive speaker.

[0005] The technical problem of the utility model is solved by the following technical solutions:

[0006] A speaker system with an external passive speaker, comprising a host speaker, an audio cable, a first external speaker and a second external speaker, wherein the host speaker comprises an amplifier and a built-in speaker, and a left channel signal and a right channel signal of the amplifier are output to the built-in speaker;

[0007] The host speaker also includes a first audio output interface and a second audio output interface. When the first external speaker is connected to the first audio output interface via the audio cable, the left channel signal of the power amplifier is converted and output to the speaker of the first external speaker; when the second external speaker is plugged into the second audio output interface via the audio cable, the right channel signal of the power amplifier is converted and output to the speaker of the second external speaker.

[0008] In some embodiments, when the switching socket is not connected to the audio cable, the positive and negative poles of the power amplifier output are connected to the positive and negative poles of the built-in speaker.

[0009] In some embodiments, when the switching socket is connected to the audio cable, the positive and negative poles of the power amplifier output are disconnected from the positive and negative circuits of the built-in speaker, and connected to the positive and negative circuits of the speaker of the corresponding external speaker.

[0010] In some embodiments, the first audio output interface and the second audio output interface are switching sockets, and the switching sockets include a first pin, a second pin, and a third pin;

[0011] When the switching socket is not connected to the audio cable, the second pin and the third pin are connected, the positive pole of the power amplifier is connected to the positive pole of the built-in speaker through the first pin, and the negative pole of the power amplifier is connected to the negative pole of the built-in speaker through the second pin and the third pin.

[0012] In some embodiments, when the switching socket is connected to the audio cable, the second pin and the third pin are separated, the positive pole of the corresponding external speaker is connected to the first pin, and the negative pole is connected to the second pin, and the third pin connected to the negative pole of the built-in speaker is left floating.

[0013] In some embodiments, the host speaker further includes a power supply, and the power supply supplies power to the host speaker, the first external speaker, and the second external speaker.

[0014] In some embodiments, the first audio output interface and the second audio output interface are each rated for effective power of 3 to 20 watts.

[0015] In some embodiments, the first external sound box includes a first external speaker, the second external sound box includes a second external speaker, and the diameters of the first external speaker and the second external speaker are 3 to 20 centimeters.

[0016] In some embodiments, the length of the audio cable is 0.3 to 1.5 meters.

[0017] The beneficial effects of the utility model compared with the prior art include:

[0018] The utility model proposes a speaker system with an external passive speaker. By arranging a high-power first audio output interface and a second audio output interface in a host speaker, when the first external speaker and the second external speaker are connected, the built-in speaker of the host speaker pauses playing, and the left and right channel signals output by the power amplifier are output to the speakers of the first external speaker and the second external speaker through the first audio output interface and the second audio output interface respectively, thereby achieving a stereo effect at a low cost.

[0019] In addition, in some embodiments, the following beneficial effects are also achieved:

[0020] The first external speaker and the second external speaker do not include a power supply and an amplifier, so the diameters of the first external speaker and the second external speaker can be set larger to provide better sound quality; the first external speaker and the second external speaker are powered by the power supply of the host speaker, which can enhance the portability of the speaker system and reduce costs.

[0021] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural block diagram of a speaker system with an external passive speaker according to an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a speaker system with an external passive speaker according to an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of a non-connected switching socket according to an embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the access of the switching socket according to the embodiment of the utility model.

[0026] The reference numerals are as follows:

[0027] 1-host speaker, 2-power supply, 3-controller, 4-signal receiving and sending device, 5-signal processing device, 6-power amplifier, 7-built-in left channel speaker, 8-built-in right channel speaker, 9-left channel output interface, 10-right channel output interface, 11-left speaker, 12-right speaker, 13-audio cable, 14-plug, 151-first pin, 152-second pin, 153-third pin. DETAILED DESCRIPTION

[0028] The present invention is further described below with reference to the accompanying drawings and in combination with preferred embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0029] It should be noted that the directional terms such as left, right, up, down, top, and bottom in this embodiment are merely relative concepts or are based on the normal use status of the product, and should not be considered as restrictive.

[0030] The present invention shows a speaker system with an external passive speaker, including a host speaker, an audio cable, a first external speaker and a second external speaker. The host speaker includes an amplifier and a built-in speaker, and the left channel signal and the right channel signal of the amplifier are output to the built-in speaker. The host speaker also includes a first audio output interface and a second audio output interface. When the first external speaker is connected to the first audio output interface via an audio cable, the left channel signal of the amplifier is converted to be output to the speaker of the first external speaker; when the second external speaker is plugged into the second audio output interface via an audio cable, the right channel signal of the amplifier is converted to be output to the speaker of the second external speaker.

[0031] Example:

[0032] The speaker system with an external passive speaker of the utility model embodiment is as follows Figure 1 and Figure 2 As shown, the host speaker 1 includes a power supply 2, a controller 3, a signal receiving and sending device 4, a signal processing device 5 and an amplifier 6, and includes built-in speakers, wherein the built-in speakers include a built-in left channel speaker 7 and a built-in right channel speaker 8. In some embodiments, there is only one built-in speaker, which can play the mixed sound of the left and right channels, and can achieve large signal output of the left and right channels; in other embodiments, there are two left and right channel speakers, plus a bass speaker, which can also achieve large signal output of the left and right channels.

[0033] The power supply 2 is a rechargeable battery, or it can be a DC power interface or an AC / DC component; the controller 3 has the functions of controlling volume increase and decrease, skipping and skipping songs, playing, pausing, answering calls, voice recognition, etc.; the signal receiving and sending device 4 has the function of receiving and sending Bluetooth and WIFI signals; the signal processing device 5 has the function of decoding and encoding the wireless signal of the signal receiving and sending device 4; the power amplifier 6 amplifies the decoded weak audio signal, which can drive the speaker of the host speaker 1 to make sound.

[0034] The back of the host speaker 1 is provided with two large-signal audio output interfaces which are not available in current small speakers, namely, a first audio output interface and a second audio output interface. Specifically, in this embodiment, the first audio output interface is a left channel output interface 9, and the second audio output interface is a right channel output interface 10, both of which are switching sockets with internal switching functions. The output power of the left channel output interface 9 and the right channel output interface 10 is 3 to 20 watts.

[0035] The host speaker 1 is also externally connected to two non-powered external speakers: a first external speaker and a second external speaker. Specifically, in this embodiment, the first external speaker is a left speaker 11, and the second external speaker is a right speaker 12. The first external speaker includes a first external speaker, and the second external speaker includes a second external speaker. Specifically, in this embodiment, the first external speaker is a left speaker, and the second external speaker is a right speaker. The diameters of the left speaker and the right speaker are 3 to 20 cm.

[0036] The back of the left speaker 11 and the right speaker 12 are both provided with an audio cable 13, and the length of each audio cable 13 is more than 30 cm. The ends of the audio cables 13 are provided with plugs 14 that match the left channel output interface 9 and the right channel output interface 10 on the host speaker 1. Figure 2 FIG. 4 shows the state when the plug 14 is not inserted into the right channel output interface 10 and is inserted into the left channel output interface 9 .

[0037] The external left and right speakers are each provided with an audio cable 13 with a length of 0.3 to 1.5 meters, so that the distance between the left and right speakers can be separated by more than 60 centimeters, and good stereo sound can be played.

[0038] The power supply 2 not only supplies power to the host speaker 1, but also supplies power to the left speaker 11 and the right speaker 12 when connected.

[0039] When the external speaker is connected to the host speaker 1 through the large signal audio output interface, the audio signal amplified by the internal power amplifier 6 of the host speaker 1 can be automatically switched from the built-in speaker of the host speaker 1 to the external speaker by using the switching socket, directly driving the speaker of the external speaker to sound, and the built-in speaker of the host speaker 1 will stop playing. For example, when the external left speaker 11 is not connected to the left channel output interface 9, the left channel of the power amplifier 6 is output to the built-in left channel speaker 7. When the external speaker, such as the external right speaker 12, is connected to the right channel output interface 10, the right channel of the power amplifier 6 is output to the right speaker speaker of the right speaker 12.

[0040] The first audio output interface and the second audio output interface are switching sockets, and the switching socket includes a first pin 151 , a second pin 152 and a third pin 153 .

[0041] like Figure 3As shown, when the switching socket is not plugged in, the single-channel signal output by the power amplifier 6, the negative pole of the power amplifier 6 is connected to the negative pole of the built-in speaker of the sound box through the second pin 152 and the third pin 153 of the switching socket. The positive and negative poles of the output of the power amplifier 6 are connected to the positive and negative poles of the built-in speaker of the sound box. For example, the first pin 151 is connected to the negative pole of the left channel output of the power amplifier 6, the second pin 152 is connected to the positive pole of the left channel output of the power amplifier 6, and the third pin 153 is connected to the negative pole of the built-in left channel speaker 7 of the small sound box. That is, the positive pole of the built-in left channel speaker 7 of the small sound box is directly connected to the positive pole of the left channel output of the power amplifier 6, and the built-in left channel speaker 7 can make a sound at this time.

[0042] like Figure 4 As shown, when the switch socket is connected to the plug, the second pin 152 and the third pin 153 of the switch socket will be separated. The positive pole of the speaker of the external speaker is connected to the first pin 151 of the switch socket, and the negative pole of the speaker of the external speaker is connected to the second pin 152 of the switch socket. The positive and negative poles of the output of the power amplifier 6 are connected to the positive and negative poles of the speaker of the external speaker. In this state, the third pin 153 connected to the negative pole of the built-in speaker of the host speaker 1 is suspended, so the positive and negative poles of the output of the power amplifier 6 are disconnected from the positive and negative poles of the built-in speaker of the host speaker 1. The first pin 151 and the third pin 153 are disconnected, the first pin 151 is connected to the negative pole of the speaker of the external left speaker, and the second pin 152 is connected to the positive pole of the speaker of the external left speaker. At this time, the external left speaker can make sound, and the built-in left channel speaker 7 will not make sound.

[0043] In other embodiments, the first audio output interface and the second audio output interface may be a small DC power socket, a 2.5mm or 3.5mm aperture mono headphone socket. Other methods may also be: using a socket without a switching function and using a mechanical switch to switch; using a socket without a switching function and controlling the electronic switch switching by manual buttons; using a magnetic interface and controlling the electronic switch switching by manual buttons, or automatically controlling the electronic switch switching by a detection circuit. However, the complexity and cost of these methods are much higher than using a socket with a switching function.

[0044] The embodiment of the utility model can solve the problems existing in the existing technical solutions, that is, it allows consumers to have good stereo and better sound quality at a relatively lower cost when they have a small speaker. Compared with the above two existing technical solutions, if a consumer already has a small speaker and wants good stereo and better sound quality: on the one hand, the cost of the two large signal output interfaces added to the host speaker can be very low; on the other hand, the external left and right speakers are passive speakers, which do not require power supplies, power amplifiers and other components, so the cost can be lower than that of speakers with power supplies and power amplifiers. At the same time, the embodiment of the utility model can also produce an additional beneficial effect: the speakers with power supplies and power amplifiers, including left and right speakers, and with relatively larger speaker diameters on the existing market usually do not have built-in batteries and have poor mobility in use; if the power supply of the host speaker is a battery, then after connecting with the external left and right speakers, it can not only play good stereo and have better sound quality, but also have good mobility when used.

[0045] The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, several equivalent substitutions or obvious deformations can also be made, and the performance or use is the same, which should be regarded as belonging to the protection scope of the utility model. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, technicians in this field can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A speaker system with an external passive speaker, characterized in that: It includes a host speaker, an audio cable, a first external speaker and a second external speaker, wherein the host speaker includes a power amplifier and a built-in speaker, and the left channel signal and the right channel signal of the power amplifier are output to the built-in speaker; The host speaker also includes a first audio output interface and a second audio output interface. When the first external speaker is connected to the first audio output interface via the audio cable, the left channel signal of the power amplifier is converted and output to the speaker of the first external speaker; when the second external speaker is plugged into the second audio output interface via the audio cable, the right channel signal of the power amplifier is converted and output to the speaker of the second external speaker.

2. The speaker system with an external passive speaker as claimed in claim 1, characterized in that: When the switching socket is not connected to the audio cable, the positive and negative poles of the power amplifier output are connected to the positive and negative poles of the built-in speaker.

3. The speaker system with an external passive speaker as claimed in claim 2, characterized in that: When the switching socket is connected to the audio cable, the positive and negative poles of the power amplifier output are disconnected from the positive and negative circuits of the built-in speaker, and are connected to the positive and negative circuits of the speaker of the corresponding external speaker.

4. The speaker system with an external passive speaker as claimed in claim 3, characterized in that: The first audio output interface and the second audio output interface are switching sockets, and the switching sockets include a first pin, a second pin, and a third pin; When the switching socket is not connected to the audio cable, the second pin and the third pin are connected, the positive pole of the power amplifier is connected to the positive pole of the built-in speaker through the first pin, and the negative pole of the power amplifier is connected to the negative pole of the built-in speaker through the second pin and the third pin.

5. The speaker system with an external passive speaker as claimed in claim 4, characterized in that: When the switching socket is connected to the audio cable, the second pin and the third pin are separated, the positive pole of the corresponding external speaker is connected to the first pin, and the negative pole is connected to the second pin, and the third pin connected to the negative pole of the built-in speaker is suspended.

6. The speaker system with an external passive speaker as claimed in claim 1, characterized in that: The host speaker also includes a power supply, which supplies power to the host speaker, the first external speaker and the second external speaker.

7. The speaker system with an external passive speaker as claimed in claim 1, characterized in that: The first audio output interface and the second audio output interface each have a rated effective power of 3 to 20 watts.

8. The speaker system with an external passive speaker as claimed in claim 1, characterized in that: The first external sound box includes a first external speaker, the second external sound box includes a second external speaker, and the diameters of the first external speaker and the second external speaker are 3 to 20 centimeters.

9. The speaker system with an external passive speaker as claimed in claim 1, characterized in that: The length of the audio cable is 0.3 to 1.5 meters.

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