Stereo Bluetooth sound box with woofer and tweeter

Abstract

The utility model discloses a stereo bluetooth sound box possessing a woofer and a tweeter, comprising a sound box housing, a woofer, a tweeter, a passive radiator and a master control PCBA circuit board, a sound box inner cavity is arranged in the sound box housing, the woofer and the tweeter are arranged at the front end of the sound box housing and face the front, and the passive radiator is arranged in the sound box inner cavity. The passive radiator is installed at the rear end of the sound box shell and faces the back, the woofer, the tweeter and the passive radiator are respectively back to the sound box inner cavity, the master control PCBA circuit board is installed in the sound box shell, and the master control PCBA circuit board is respectively and electrically connected with the woofer and the tweeter. According to the utility model, treble and bass frequency division processing of audio signals can be realized, and the sound effect and the stereophonic effect of the sound box are improved; the passive radiator provided by the utility model can enable the sound box to have a surround sound effect, can eliminate the disturbance of airflow in the inner cavity of the sound box, improves the overall sound quality of the sound box, and especially improves the bass sound quality effect.

Description

Technical Field

[0001] The utility model relates to the technical field of sound boxes, in particular to a stereo Bluetooth sound box with a woofer and a tweeter. Background Art

[0002] Speakers refer to a device that can convert audio signals into sound. With the development of intelligent speakers, Bluetooth speakers that can connect to Bluetooth devices (such as smartphones, tablets, TVs, etc.) are gradually being widely used. Currently, Bluetooth speakers on the market usually have only one side equipped with ordinary speakers. Their disadvantages are: on the one hand, the bass audio and treble audio are not processed by frequency division, the bass sound effect is relatively poor, and the stereo effect is also relatively poor; on the other hand, the sound, especially the low-frequency sound, can only come out from one direction of the Bluetooth speaker, making it difficult to achieve a surround sound effect; on the other hand, when the speaker vibrates and sounds, the airflow inside the speaker box is easily disturbed, which reduces the overall sound quality of the speaker, especially the poor bass effect.

[0003] With the advancement of technology, speakers with woofers and tweeters gradually appear. See Chinese patent document CN109996146A, which discloses a speaker and a sound diffusion system. The speaker includes a box body, and the speaker includes a tweeter, a mid-high frequency speaker and a woofer. The tweeter, the mid-high frequency speaker and the woofer are arranged on an angle diffusion panel and a front panel. The patent can realize the frequency division processing of the audio signal by arranging the tweeter, the mid-high frequency speaker and the woofer, thereby improving the bass sound effect and the stereo effect. However, the patent CN109996146A still has the following problems. On the one hand, the low-frequency sound can only come out from one direction of the speaker, and it is difficult to achieve the surround sound effect; on the other hand, when the speaker vibrates and sounds, the airflow inside the speaker box is easily disturbed, resulting in a decrease in the overall sound quality of the speaker, especially the bass effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a stereo Bluetooth speaker with a woofer and a tweeter in view of the deficiencies of the above-mentioned prior art. The Bluetooth speaker is provided with a woofer and a tweeter at the front end of a speaker shell, which can realize high and low frequency division processing of audio signals and improve the sound effect and stereo effect of the speaker. The Bluetooth speaker has a speaker cavity inside, and a passive radiator is installed at the rear end of the speaker shell. The woofer, the tweeter and the passive radiator are respectively facing away from the speaker cavity. The airflow generated by the vibration of the woofer and the tweeter, especially the woofer, can enter the speaker cavity and be transmitted to the passive radiator. The passive radiator passively emits sound under the drive of the airflow in the speaker cavity and emits sound to the rear of the speaker, which has a surround sound effect. At the same time, it can eliminate the disturbance of the airflow in the speaker cavity and improve the overall sound quality of the speaker, especially improve the bass sound quality effect.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a stereo Bluetooth speaker with a woofer and a tweeter, comprising a speaker shell, a woofer, a tweeter, a passive radiator and a main control PCBA circuit board, the speaker shell has a speaker cavity, the woofer and the tweeter are installed at the front end of the speaker shell and face the front, the passive radiator is installed at the rear end of the speaker shell and faces the rear, the woofer, the tweeter and the passive radiator are respectively facing away from the speaker cavity, the main control PCBA circuit board is installed in the speaker shell, and the main control PCBA circuit board is electrically connected to the woofer and the tweeter respectively.

[0006] Preferably, the woofer is installed in the middle of the front end of the speaker shell, two tweeters are provided, and the two tweeters are respectively installed on both sides of the woofer, and the passive radiator is installed in the middle of the rear end of the speaker shell, and the positions of the woofer and the passive radiator are opposite to each other front and back.

[0007] Preferably, the speaker housing comprises a plastic inner housing and a wooden outer housing, the wooden outer housing is mounted on the outside of the plastic inner housing, the plastic inner housing comprises a front inner housing and a rear inner housing that are combined with each other, the woofer and the tweeter are mounted on the front inner housing, the passive radiator is mounted on the rear inner housing, the main control PCBA circuit board is mounted between the front inner housing and the rear inner housing and is located behind one of the tweeters, and the speaker inner cavity is located within the space enclosed by the front inner housing and the rear inner housing.

[0008] Preferably, a PCBA board installation cavity is provided on one side of the rear inner shell of the plastic inner shell, an input / output PCBA board is installed in the PCBA board installation cavity, and the input / output PCBA board is electrically connected to the main control PCBA circuit board; a first opening is provided on one side of the PCBA board installation cavity, and the wooden outer box is provided with a second opening corresponding to the first opening; the input / output PCBA board is connected with a USB TYPE-C connector and extends outwardly into the first opening and the second opening; a sealing plastic cover is installed in the second opening, the sealing plastic cover covers the outside of one end of the input / output PCBA board, the sealing plastic cover is provided with a first through hole for inserting the USB TYPE-C connector, and a fixing bracket is connected to one end of the sealing plastic cover, the fixing bracket extends to the lower side of the input / output PCBA board and is fixed in the PCBA board installation cavity together with the input / output PCBA board.

[0009] Preferably, one end of the input / output PCBA board is also connected to an audio input connector, and the sealing plastic cover is provided with a second through hole for inserting the audio input connector.

[0010] Preferably, a rechargeable battery is also installed in the plastic inner shell, and the rechargeable battery is located behind another tweeter. A channel for air flow through the inner cavity of the speaker is provided between the rechargeable battery and the main control PCBA circuit board, and the main control PCBA circuit board is electrically connected to the rechargeable battery.

[0011] Preferably, a key slot is provided on the front inner shell of the plastic inner shell, a key PCBA board is installed in the key slot, the main control PCBA circuit board is electrically connected to the key PCBA board, and the wooden outer box is provided with a third opening corresponding to the key PCBA board, and a plastic key cover is installed in the third opening.

[0012] Preferably, the front and rear ends of the wooden outer box are respectively hollowed out, a front sound grille is installed at the front end of the front inner shell of the plastic inner shell, and a rear sound grille is installed at the rear end of the rear inner shell of the plastic inner shell.

[0013] The beneficial effects of the utility model are as follows: since the woofer and the tweeter are installed at the front end of the speaker shell, the utility model can realize the high and low frequency division processing of the audio signal, thereby improving the sound effect and stereo effect of the speaker; since the utility model has a speaker cavity inside the speaker shell, and a passive radiator is installed at the rear end of the speaker shell, the woofer, the tweeter and the passive radiator are respectively facing away from the speaker cavity, and the airflow generated by the vibration of the woofer and the tweeter, especially the woofer, can enter the speaker cavity and be transmitted to the passive radiator. The passive radiator passively emits sound under the drive of the airflow in the speaker cavity and emits sound to the rear of the speaker, having a surround sound effect, and at the same time can eliminate the disturbance of the airflow in the speaker cavity, and improve the overall sound quality of the speaker, especially improve the bass sound quality effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the utility model.

[0015] Figure 2 This is one of the dispersed structure diagrams of the utility model.

[0016] Figure 3 This is the second dispersed structure diagram of the present utility model.

[0017] Figure 4 This is the third dispersed structure diagram of the present utility model.

[0018] Figure 5 This is the fourth dispersed structure diagram of the present utility model.

[0019] In the figure: 1. Speaker shell; 101. Speaker cavity; 102. Channel; 11. Plastic inner shell; 111. Front inner shell; 112. Rear inner shell; 113. PCBA board installation cavity; 114. First opening; 12. Wooden outer box; 121. Second opening; 122. Third opening; 2. Woofer; 3. Tweeter; 4. Passive radiator; 5. Main control PCBA circuit board; 6. Input and output PCBA board; 61. USB TYPE-C connector; 7. Sealed plastic cover; 71. First through hole; 72. Fixed bracket; 73. Second through hole; 8. Rechargeable battery; 9. Button PCBA board; 10. Plastic button cover; 13. Front sound grille; 14. Rear sound grille; 15. Silicone pad. DETAILED DESCRIPTION

[0020] The structural principle and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-Figure 5 As shown, the utility model is a stereo Bluetooth speaker with a woofer and a tweeter, comprising a speaker housing 1, a woofer 2, a tweeter 3, a passive radiator 4 and a main control PCBA circuit board 5, wherein the speaker housing 1 has a speaker inner cavity 101, the woofer 2 and the tweeter 3 are mounted at the front end of the speaker housing 1 and face forward, the passive radiator 4 is mounted at the rear end of the speaker housing 1 and face backward, the woofer 2, the tweeter 3 and the passive radiator 4 are respectively facing away from the speaker inner cavity 101, the main control PCBA circuit board 5 is mounted in the speaker housing 1, and the main control PCBA circuit board 5 is electrically connected to the woofer 2 and the tweeter 3, respectively. The utility model can realize the high and low frequency division processing of the audio signal, and improve the sound effect and stereo effect of the speaker; the woofer 2 and the tweeter 3 of the utility model, especially the airflow generated by the vibration of the woofer 2, can enter the inner cavity 101 of the speaker and be transmitted to the passive radiator 4. The passive radiator 4 passively emits sound under the drive of the airflow in the inner cavity 101 of the speaker, and emits sound to the rear of the speaker, which has a surround sound effect, and can eliminate the disturbance of the airflow in the inner cavity 101 of the speaker, and improve the overall sound quality of the speaker, especially improve the bass sound quality effect.

[0022] like Figure 3-Figure 5 As shown, the woofer 2 is installed in the middle of the front end of the speaker housing 1, two tweeters 3 are provided, and the two tweeters 3 are respectively installed on both sides of the woofer 2, and the passive radiator 4 is installed in the middle of the rear end of the speaker housing 1. The positions of the woofer 2 and the passive radiator 4 are opposite to each other front and back, so that the airflow generated by the sound vibration of the woofer 2 can directly reach the passive radiator 4.

[0023] like Figure 1-Figure 5As shown, the speaker housing 1 includes a plastic inner housing 11 and a wooden outer housing 12, the wooden outer housing 12 is mounted outside the plastic inner housing 11, the plastic inner housing 11 includes a front inner housing 111 and a rear inner housing 112 that are combined with each other, the woofer 2 and the tweeter 3 are mounted on the front inner housing 111, the passive radiator 4 is mounted on the rear inner housing 112, the main control PCBA circuit board 5 is mounted between the front inner housing 111 and the rear inner housing 112 and is located behind one of the tweeters 3, and the speaker cavity 101 is located in the space surrounded by the front inner housing 111 and the rear inner housing 112. The speaker housing uses plastic as the inner housing, which has a good airtightness effect, and the outer housing uses a wooden outer housing, which gives the overall appearance of the speaker a real wood feel and better sound effects.

[0024] like Figure 1-Figure 5 As shown, a PCBA board installation cavity 113 is provided on one side of the rear inner shell 112 of the plastic inner shell 11, and an input / output PCBA board 6 is installed in the PCBA board installation cavity 113, and the input / output PCBA board 6 is electrically connected to the main control PCBA circuit board 5; a first opening 114 is provided on one side of the PCBA board installation cavity 113, and the wooden outer box 12 is provided with a second opening 121 corresponding to the first opening 114; the input / output PCBA board 6 is connected to a USB The TYPE-C connector 61 extends outward into the first opening 114 and the second opening 121; a sealing plastic cover 7 is installed in the second opening 121, and the sealing plastic cover 7 covers the outside of one end of the input / output PCBA board 6. The sealing plastic cover 7 is provided with a first through hole 71 for inserting the USB TYPE-C connector 61. A fixing bracket 72 is connected to one end of the sealing plastic cover 7, and the fixing bracket 72 extends into the lower side of the input / output PCBA board 6 and is fixed together with the input / output PCBA board 6 in the PCBA board installation cavity 113. The utility model can use the PCBA board installation cavity to fix the input and output PCBA board and the sealing plastic cover at the same time, which is simple to assemble and firmly fixed; the utility model can use the sealing plastic cover to plug into the second opening of the outer box of the speaker to prevent sound leakage from the side of the speaker and to prevent the internal components of the speaker from being seen from the second opening, and can make the USB TYPE-C connector of the input and output PCBA board inserted into the first through hole of the sealing plastic cover, so that the USB TYPE-C connector is easy to plug in. Preferably, one end of the input and output PCBA board 6 is also connected to an audio input connector 62, and the sealing plastic cover 7 is provided with a second through hole 73 for the audio input connector 62 to be inserted.

[0025] like Figure 4-Figure 5As shown, a rechargeable battery 8 is also installed in the plastic inner shell 11. The rechargeable battery 8 is located behind another tweeter 3. A channel 102 for airflow through the inner cavity 101 of the speaker is provided between the rechargeable battery 8 and the main control PCBA circuit board 5 to prevent the rechargeable battery 8 and the main control PCBA circuit board 5 from blocking the airflow generated by the vibration of the woofer. The main control PCBA circuit board 5 is electrically connected to the rechargeable battery 8.

[0026] like Figure 1-Figure 5 As shown, a key slot 115 is provided on the front inner shell 111 of the plastic inner shell 11, a key PCBA board 9 is installed in the key slot 115, the main control PCBA circuit board 5 is electrically connected to the key PCBA board 9, and the wooden outer box 12 is provided with a third opening portion 122 corresponding to the key PCBA board 9, and a plastic key cover 10 is installed in the third opening portion 122.

[0027] like Figure 1-Figure 5 As shown, the front and rear ends of the wooden outer box 12 are respectively hollowed out, the front end of the front inner shell 111 of the plastic inner shell 11 is installed with a front sound grille 13, and the rear end of the rear inner shell 112 of the plastic inner shell 11 is installed with a rear sound grille 14. A silicone pad 15 is also installed at the lower end of the wooden outer box 12.

[0028] The above is only a preferred embodiment of the present invention. Any slight modification, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A stereo Bluetooth speaker with a woofer and a tweeter, characterized in that: The invention comprises a speaker housing (1), a woofer (2), a tweeter (3), a passive radiator (4) and a main control PCBA circuit board (5), wherein the speaker housing (1) has a speaker inner cavity (101), the woofer (2) and the tweeter (3) are mounted at the front end of the speaker housing (1) and face forward, the passive radiator (4) is mounted at the rear end of the speaker housing (1) and face backward, the woofer (2), the tweeter (3) and the passive radiator (4) are respectively facing away from the speaker inner cavity (101), and the main control PCBA circuit board (5) is mounted in the speaker housing (1), and the main control PCBA circuit board (5) is respectively electrically connected to the woofer (2) and the tweeter (3).

2. The stereo Bluetooth speaker with a woofer and a tweeter according to claim 1, characterized in that: The woofer (2) is mounted at the middle of the front end of the speaker housing (1), two tweeters (3) are provided, and the two tweeters (3) are respectively mounted on both sides of the woofer (2), and the passive radiator (4) is mounted at the middle of the rear end of the speaker housing (1), and the woofer (2) and the passive radiator (4) are positioned opposite to each other front and back.

3. The stereo Bluetooth speaker with a woofer and a tweeter according to claim 2, characterized in that: The speaker housing (1) comprises a plastic inner housing (11) and a wooden outer housing (12), wherein the wooden outer housing (12) is mounted outside the plastic inner housing (11), and the plastic inner housing (11) comprises a front inner housing (111) and a rear inner housing (112) which are combined with each other, the woofer (2) and the tweeter (3) are mounted on the front inner housing (111), the passive radiator (4) is mounted on the rear inner housing (112), the main control PCBA circuit board (5) is mounted between the front inner housing (111) and the rear inner housing (112) and is located behind one of the tweeters (3), and the speaker inner cavity (101) is located within the space enclosed by the front inner housing (111) and the rear inner housing (112).

4. The stereo Bluetooth speaker with a woofer and a tweeter according to claim 3, characterized in that: A PCBA board installation cavity (113) is provided on one side of the rear inner shell (112) of the plastic inner shell (11), an input / output PCBA board (6) is installed in the PCBA board installation cavity (113), and the input / output PCBA board (6) is electrically connected to the main control PCBA circuit board (5); a first opening (114) is provided on one side of the PCBA board installation cavity (113), and the wooden outer box (12) is provided with a second opening (121) corresponding to the first opening (114); the input / output PCBA board (6) is connected to a USB TYPE-C connector (61) and extends outwardly into the first opening (114) and the second opening (121); a sealing plastic cover (7) is installed in the second opening (121), the sealing plastic cover (7) covers one end of the input / output PCBA board (6), and the sealing plastic cover (7) is provided with a USB TYPE-C connector (61) and a sealing plastic cover (7) is provided for the input / output PCBA board (6). A TYPE-C connector (61) is inserted into a first through hole (71), one end of the sealing plastic cover (7) is connected to a fixing bracket (72), the fixing bracket (72) extends to the lower side of the input / output PCBA board (6) and is fixed together with the input / output PCBA board (6) within the PCBA board mounting cavity (113).

5. The stereo Bluetooth speaker with a woofer and a tweeter according to claim 4, characterized in that: One end of the input / output PCBA board (6) is also connected to an audio input connector (62), and the sealing plastic cover (7) is provided with a second through hole (73) for inserting the audio input connector (62).

6. The stereo Bluetooth speaker with a woofer and a tweeter according to claim 3, characterized in that: A rechargeable battery (8) is also installed inside the plastic inner shell (11). The rechargeable battery (8) is located behind another tweeter (3). A channel (102) for airflow in the inner cavity (101) of the speaker is provided between the rechargeable battery (8) and the main control PCBA circuit board (5). The main control PCBA circuit board (5) is electrically connected to the rechargeable battery (8).

7. The stereo Bluetooth speaker with a woofer and a tweeter according to claim 3, characterized in that: A key slot (115) is provided on the front inner shell (111) of the plastic inner shell (11), a key PCBA board (9) is installed in the key slot (115), the main control PCBA circuit board (5) is electrically connected to the key PCBA board (9), and the wooden outer box (12) is provided with a third opening (122) corresponding to the key PCBA board (9), and a plastic key cover (10) is installed in the third opening (122).

8. The stereo Bluetooth speaker with a woofer and a tweeter according to claim 3, characterized in that: The front end and the rear end of the wooden outer box (12) are respectively hollowed out, the front end of the front inner shell (111) of the plastic inner shell (11) is installed with a front sound grille (13), and the rear end of the rear inner shell (112) of the plastic inner shell (11) is installed with a rear sound grille (14).

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