Sound system with external passive sound box

Abstract

The utility model discloses a sound system with an external passive sound box, which comprises a host sound box, an audio cable and an external sound box, the host sound box comprises a control switch, a built-in loudspeaker, an audio output interface, a first intermediate unit and a second intermediate unit, the first intermediate unit is connected with the built-in loudspeaker, and the second intermediate unit is connected with the external passive sound box. The second intermediate unit is connected with the audio output interface, and the audio output interface is connected with the external sound box through the audio line; the control switch is connected with the first middle unit and the second middle unit and used for controlling the first middle unit and the second middle unit to be switched on and off, and when the control switch is communicated with the first middle unit, the first middle unit drives the built-in loudspeaker to play; when the control switch controls the second intermediate unit to be connected, the second intermediate unit drives the external sound box to play.

Description

Technical Field

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

[0002] Small speakers currently available on the market, such as small Bluetooth speakers and WiFi smart speakers, have three technical limitations: First, as far as a single speaker is concerned, no matter how many speakers it has, it cannot play stereo sound, or cannot play very good stereo sound; Second, there are usually only audio input interfaces with a small signal power not exceeding 60mW, and very few have small signal audio output interfaces. The output signals cannot directly drive the speaker of the speaker to produce a loud enough sound, that is, it cannot directly drive an additional speaker to play the sound of one of the left and right channels, or cannot directly drive two additional speakers to play the sound of the left and right channels respectively; Third, some speakers can only use small-caliber speakers due to their small size and sound cavity, so the sound quality is usually average, and it is difficult to achieve the same sound quality as speakers with larger-caliber speakers.

[0003] Due to the technical limitations of the above-mentioned small speakers, if a user wants and already has a small speaker, and also wants good stereo and better sound quality, there are three technical solutions: 1. If the existing small speaker has the TWS true wireless function, then you can add another small speaker of the same type; if the sound quality of the small speaker is average, use two, although you can achieve good stereo, but the sound quality is still average; 2. If the existing small speaker has the TWS true wireless function and good sound quality, it is usually larger than the ordinary one and the cost is higher, so using two will cost more; 3. If you already have a small speaker with average sound quality, you can use an additional speaker with power supply and amplifier, including left and right speakers, and with a relatively larger speaker diameter. These three technical solutions generated by the three technical limitations of the above-mentioned small speakers either have poor effects or 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 sound box and achieving better stereo sound quality, and provides a sound system with an external passive sound box.

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

[0006] The utility model provides an audio system with an external passive speaker, comprising a host speaker, an audio line and an external speaker, wherein the host speaker comprises a control switch, a built-in speaker, an audio output interface, a first intermediate unit and a second intermediate unit, wherein the first intermediate unit is connected to the built-in speaker, the second intermediate unit is connected to the audio output interface, and the audio output interface is connected to the external speaker via the audio line; the control switch is connected to the first intermediate unit and the second intermediate unit and is used to control the switches thereof, and when the control switch is connected to the first intermediate unit, the first intermediate unit drives the built-in speaker to play; when the control switch controls the second intermediate unit to be connected, the second intermediate unit drives the external speaker to play.

[0007] In some embodiments, the host speaker further includes a power supply, and the power supply supplies power to the host speaker and the external speaker.

[0008] In some embodiments, the control switch is a power amplifier power control switch, the intermediate unit is a power amplifier, one end of the power amplifier power control switch is connected to the power supply, and the other end is connected to the first intermediate unit and the second intermediate unit for controlling the switching thereof;

[0009] When the power amplifier power control switch controls the first intermediate unit to be connected, the first intermediate unit is powered on and drives the built-in speaker to play;

[0010] When the power amplifier power control switch controls the second intermediate unit to be connected, the second intermediate unit is powered on and drives the external speaker to play.

[0011] In some embodiments, the invention further includes a left and right channel mixing circuit, the first intermediate unit receives a left channel signal or a right channel signal, the second intermediate unit is a channel mixing circuit, and always receives a signal of a channel different from that of the first intermediate unit, and the control switch is a channel control switch, one end of which is connected to the signal source of the first intermediate unit, and the other end is connected to the first intermediate unit and the second intermediate unit;

[0012] When the channel control switch controls the first intermediate unit to be connected, the external speaker plays the sound of the channel corresponding to the first intermediate unit, and the built-in speaker plays the sound of the channel corresponding to the second intermediate unit;

[0013] When the channel control switch controls the second intermediate unit to be connected, the left channel signal and the right channel signal are both input into the channel mixing circuit for mixing, and then played through the built-in speaker.

[0014] In some embodiments, the number of the audio output interfaces is 1 or 2.

[0015] In some embodiments, when the number of the audio output interface is 1, the audio output interface is a left channel audio output interface or a right channel audio output interface.

[0016] In some embodiments, when the number of the audio output interfaces is 2, the audio output interfaces include a left channel output interface and a right channel output interface.

[0017] In some embodiments, the audio output interface has a rated effective power of 3 to 50 watts.

[0018] In some embodiments, the external sound box includes an external speaker, and the diameter of the external speaker is 2 to 20 centimeters.

[0019] In some embodiments, the length of the audio cable is 30 to 150 centimeters.

[0020] The beneficial effects of the utility model compared with the prior art include:

[0021] The utility model provides an audio system with an external passive speaker. By arranging a high-power audio output interface in a host speaker and a corresponding external speaker, and arranging a control switch and an intermediate unit, the host speaker can be used alone or connected to the external speaker.

[0022] In some embodiments, when the control switch is an amplifier power control switch, the working states of the built-in speakers and external speakers can be controlled by controlling the power-on state of each amplifier, thereby controlling whether the sound is played by the built-in speakers or the external speakers, thereby achieving a low-cost stereo effect.

[0023] In some embodiments, when the control switch is a channel control switch, it can control whether the built-in speaker plays a mixture of left and right channels, or only plays one of the channels, with the other channel played by an external speaker, thereby achieving a low-cost stereo effect.

[0024] By setting the power source of the host speaker to a rechargeable battery, the entire system does not need to rely on an external power supply like the existing speakers on the market with amplifiers, left and right speakers, and relatively larger speaker diameters, and has better mobility and convenience.

[0025] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural block diagram of an audio system with a host and left and right channel external passive speakers according to an embodiment of the utility model;

[0027] Figure 2It is a structural schematic diagram of an audio system with a host and left and right channel external passive speakers according to an embodiment of the utility model;

[0028] Figure 3 It is a structural block diagram of an audio system of a host with a power amplifier power control switch and a 1-channel external passive speaker in an embodiment of the utility model;

[0029] Figure 4 The utility model is a structural block diagram of a sound system of a host with a channel control switch and a one-channel external passive speaker.

[0030] The reference numerals are as follows:

[0031] 1-Host speaker, 2-Power supply, 3-Controller, 4-Signal receiving and sending device, 5-Signal processing device, 6-Left and right channel small signal mixing circuit, 7-Built-in speaker driving amplifier, 8-Built-in speaker, 9-Left channel external speaker driving amplifier, 10-Right channel external speaker driving amplifier, 11-Left channel output interface, 12-Right channel output interface, 13-Left channel external speaker, 14-Right channel external speaker, 15-Amplifier power control switch, 16-Audio cable, 17-Audio cable end plug, 18-Left channel audio weak signal channel, 19-Right channel audio weak signal channel, 20-Channel control switch. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] The present invention shows an audio system with an external passive speaker, comprising a host speaker, an audio cable, and an external speaker; the host speaker comprises a built-in speaker and a first power amplifier driving the built-in speaker, and also comprises a high-power audio output interface and a second power amplifier driving the external speaker; the high-power audio output interface can be connected to the external speaker;

[0035] The host speaker also includes an amplifier power control switch or a channel control switch; through the amplifier power control switch, the power supply of the built-in speaker driving the amplifier and the external speaker driving the amplifier can be controlled, thereby controlling whether the built-in speaker plays or the external speaker plays; through the channel control switch, it can be controlled whether the built-in speaker plays the mixed sound of the left and right channels, or only plays the sound of one of the channels, and the other channel is played by the external speaker.

[0036] Example:

[0037] An embodiment of the present utility model is as follows Figure 1 and Figure 2 As shown, this embodiment is a speaker system with left and right channel external passive speakers, wherein the host speaker 1 includes a power supply 2, a controller 3, a signal receiving and sending device 4, a signal processing device 5, a left and right channel small signal mixing circuit 6, a built-in speaker driving amplifier 7, a built-in speaker 8, a left channel external speaker driving amplifier 9, a right channel external speaker driving amplifier 10, a left channel output interface 11, a right channel output interface 12, and an amplifier power control switch 15.

[0038] 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 functions such as controlling volume increase and decrease, skipping and skipping songs, playing, pausing, answering calls, and voice recognition; 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 left and right channel mixing circuit 6 mixes the decoded left and right channel weak audio signals, and the built-in speaker driving amplifier 7 can drive the built-in speaker 8 of the host speaker 1 to make sound.

[0039] The back of the host speaker 1 is provided with two large-signal audio output interfaces, namely the left channel output interface and the right channel output interface, which are not available in current small speakers. The output effective power of the left channel output interface 11 and the right channel output interface 12 is 3 to 50 watts respectively.

[0040] The host speaker 1 is also connected to two external speakers without power supply: a left channel external speaker 13 and a right channel external speaker 14. The left channel external speaker 13 includes a left channel external speaker, and the right channel external speaker 14 includes a right channel external speaker. Specifically, in this embodiment, the diameters of the left speaker and the right speaker are 2 to 20 cm.

[0041] The back of the left speaker 13 and the right speaker 14 are both provided with an audio cable 16, and the length of each audio cable 16 is more than 30 cm. The ends of the audio cables 16 are provided with plugs 17 that match the left channel output interface 11 and the right channel output interface 12 on the host speaker 1. Figure 2 FIG. 4 shows the state when the plug 17 is not inserted into the right channel output interface 12 and is inserted into the left channel output interface 11. FIG.

[0042] The external left and right speakers are each provided with an audio cable 16 with a length of 30 cm to 150 cm, so that the distance between the left and right speakers can be separated exceeds 60 cm, and good stereo sound can be played.

[0043] The power supply 2 not only supplies power to the host speaker 1, but also supplies power to the left speaker 13 and the right speaker 14 when connected.

[0044] The host speaker 1 can be used alone or connected to the left channel external speaker 13 and the right channel external speaker 14. By setting the power amplifier power control switch 15, it can be set to play by the host speaker 8 or by the left channel external speaker 13 and the right channel external speaker 14.

[0045] When the power amplifier power control switch 15 is connected to the built-in speaker driving amplifier 7, the built-in speaker 8 plays, at this time the left channel external speaker driving amplifier 9 and the right channel external speaker driving amplifier 10 are powered off and do not work, and the left channel output interface and the right channel output interface have no output; when the power amplifier power control switch 15 is connected to the left channel external speaker driving amplifier 9 and the right channel external speaker driving amplifier 10, the left channel external speaker 13 and the right channel external speaker 14 play, at this time the built-in speaker driving amplifier 7 is powered off and does not work, and the built-in speaker 8 does not play.

[0046] The power amplifier power control switch 15 can be a mechanical switch or an electronic switch.

[0047] The left channel output interface 11 and the right channel output interface 12 can be a small DC power socket, a 2.5mm or 3.5mm aperture mono headphone socket, or a magnetic connector.

[0048] In some other embodiments, the host has 2 or more built-in speakers and 2 or more power amplifiers for the built-in speakers, and the method of controlling the playback of the built-in speakers or external speakers is the same as the above embodiment.

[0049] Another embodiment of the present invention is as follows Figure 3 As shown, this embodiment is a speaker system with only one channel external passive speaker. Figure 1 The difference between the embodiment shown is that this embodiment only has a left channel output interface 11 and a left channel external speaker 13, while the right channel still uses the built-in speaker 8 of the host 1. This embodiment is suitable for the sound quality of the host 1, so only one external speaker is set to better reduce the cost. When the host 1 is used alone, it can play at its maximum playback power; when the host 1 is connected to the left channel external speaker 13, the built-in speaker 8 and the left channel external speaker 13 can each play at half of the maximum playback power of the host 1. For example: if the maximum playback power of the host 1 is 10W, then when the host 1 is used alone, the maximum playback power is 10W; if the host 1 is connected to the left channel external speaker 13, the maximum playback power of the host 1 and the left channel external speaker is 5W each.

[0050] Another embodiment of the present invention is as follows Figure 4As shown, this embodiment is also a sound system with only one channel external passive speaker. Figure 3 The embodiment shown is different in that the present embodiment does not use the power amplifier power control switch 15, but uses the channel control switch 20; when the host is used alone, the channel control switch 20 connects the left channel audio weak signal channel 18 to the left and right channel mixing circuit 6, and the right channel audio weak signal channel 19 is always connected to the left and right channel mixing circuit 6, and the built-in speaker 8 can play the mixed sound of the left and right channels; when the host 1 is connected to the left channel external speaker, the channel control switch 20 connects the left channel audio weak signal channel to the left channel external speaker driving amplifier 9, and the built-in speaker 8 only plays the right channel sound, and the left channel external speaker 13 plays the left channel sound; in this embodiment, when the host 1 is connected to the external speaker, not only the built-in speaker 8 is used, but also the driving amplifier 7 of the built-in speaker 8 is used, which can better reduce the cost. The channel control switch 20 can be a mechanical switch or an electronic switch. In this embodiment, when the host 1 is used alone, it can only play at half of its maximum playback power; when the host 1 is connected to the left channel external speaker 13, the built-in speaker 8 and the left channel external speaker 13 can each play at half of the maximum playback power of the host 1. For example: if the maximum playback power of the host 1 is 10W, then when the host 1 is used alone, the maximum playback power is 5W; if the host 1 is connected to the left channel external speaker 13, the maximum playback power of the host 1 and the left channel external speaker is 5W each.

[0051] 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 adding one or two large signal output interfaces to the host speaker and the cost of adding an external speaker driving amplifier, amplifier power control switch or channel control switch can be very low; on the other hand, the external speaker is a passive speaker, which does not require power supply, amplifier and other components, so the cost can be lower than that of a speaker with power supply and amplifier. At the same time, the embodiment of the utility model can also produce an additional beneficial effect: the speakers with power supply and amplifier, 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 external speakers, it can not only play good stereo and have better sound quality, but also have good mobility when used.

[0052] 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 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 sound system with an external passive speaker, characterized in that: It includes a host speaker, an audio cable and an external speaker, the host speaker includes a control switch, a built-in speaker, an audio output interface, a first intermediate unit and a second intermediate unit, the first intermediate unit is connected to the built-in speaker, the second intermediate unit is connected to the audio output interface, and the audio output interface is connected to the external speaker through the audio cable; the control switch is connected to the first intermediate unit and the second intermediate unit for controlling their switches, when the control switch is connected to the first intermediate unit, the first intermediate unit drives the built-in speaker to play; when the control switch controls the second intermediate unit to be connected, the second intermediate unit drives the external speaker to play.

2. The sound 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 and the external speaker.

3. The sound system with an external passive speaker as claimed in claim 2, characterized in that: The control switch is a power amplifier power control switch, the intermediate unit is a power amplifier, one end of the power amplifier power control switch is connected to the power supply, and the other end is connected to the first intermediate unit and the second intermediate unit for controlling the switch thereof; When the power amplifier power control switch controls the first intermediate unit to be connected, the first intermediate unit is powered on and drives the built-in speaker to play; When the power amplifier power control switch controls the second intermediate unit to be connected, the second intermediate unit is powered on and drives the external speaker to play.

4. The sound system with an external passive speaker as claimed in claim 2, characterized in that: It also includes a left and right channel mixing circuit, the first intermediate unit receives a left channel signal or a right channel signal, the second intermediate unit is a channel mixing circuit, and always receives a signal of a channel different from that of the first intermediate unit, and the control switch is a channel control switch, one end of which is connected to the signal source of the first intermediate unit, and the other end is connected to the first intermediate unit and the second intermediate unit; When the channel control switch controls the first intermediate unit to be connected, the external speaker plays the sound of the channel corresponding to the first intermediate unit, and the built-in speaker plays the sound of the channel corresponding to the second intermediate unit; When the channel control switch controls the second intermediate unit to be connected, the left channel signal and the right channel signal are both input into the channel mixing circuit for mixing, and then played through the built-in speaker.

5. The sound system with an external passive speaker as claimed in claim 1, characterized in that: The number of the audio output interfaces is 1 or 2.

6. The sound system with an external passive speaker as claimed in claim 5, characterized in that: When the number of the audio output interface is 1, the audio output interface is a left channel audio output interface or a right channel audio output interface.

7. The sound system with an external passive speaker as claimed in claim 5, characterized in that: When the number of the audio output interfaces is 2, the audio output interfaces include a left channel output interface and a right channel output interface.

8. The sound system with an external passive speaker as claimed in any one of claims 1 to 7, characterized in that: The rated effective power of the audio output interface is 3 to 50 watts.

9. The sound system with an external passive speaker as claimed in any one of claims 1 to 7, characterized in that: The external sound box includes an external speaker, and the diameter of the external speaker is 2 to 20 centimeters.

10. The sound system with an external passive speaker as claimed in any one of claims 1 to 7, characterized in that: The length of the audio cable is 30 to 150 centimeters.

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