A Bluetooth headset with passive noise reduction

Abstract

This utility model discloses a Bluetooth headset with passive noise cancellation, including a headset body and a headband. The headset body includes an ear shell, a circuit board, a speaker, a microphone, and ear tips. A baffle is provided in the ear shell, and an ear tip support is provided in front of the baffle. A sealing ring is provided between the ear tip support and the baffle, forming a buffer cavity. A through hole is provided in the ear tip support, aligned with the buffer cavity, and ear foam is provided within the buffer cavity. The ear tip is fixed to the ear tip support, with the ear foam protruding from the through hole in the ear tip and ear tip support. This utility model, by setting a baffle inside the headset body and using a sealing ring to fix the ear foam and ear tips as a passive noise cancellation structure, can effectively absorb external noise and prevent noise from being transmitted to the wearer's ears, thus improving the passive noise cancellation effect. At the same time, the ear foam and ear tips fit the ear better, and the ear contact parts are made of flexible materials, which is more ergonomic and provides better comfort.

Description

Technical Field

[0001] This utility model relates to the field of headphone product technology, and in particular to a Bluetooth headset with passive noise cancellation. Background Technology

[0002] Headphones are commonly used electronic products. Currently, noise-canceling Bluetooth headphones on the market are mainly designed for everyday wearable communication and gaming, mostly relying on active noise cancellation. However, active noise cancellation increases the power consumption of headphones, making them less suitable for outdoor sports or work. To address this, some in the industry have designed headphones that integrate both active and passive noise cancellation. For example, Chinese invention patent CN202111044782.5 discloses a headphone speaker with good noise cancellation function. It uses an active noise cancellation device for active noise cancellation, and the speaker can directly output the noise-canceling sound, resulting in good noise cancellation. Simultaneously, a passive noise cancellation device creates a relatively sealed environment between the ear and the earpad, effectively preventing external noise from interfering with the speaker's transmission and optimizing the noise cancellation effect. However, this headphone only uses a simple earpad in conjunction with passive noise cancellation, which can still cause ear discomfort after prolonged wear. Furthermore, the passive noise cancellation device is a generic, simple structure, and its noise cancellation effect is not good enough. Additionally, integrating active noise cancellation also increases the headphone's power consumption. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a Bluetooth headset with passive noise cancellation that features a more rational structural design, greater wearing comfort, and improved passive noise cancellation performance.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a Bluetooth headset with passive noise cancellation, comprising a headset body and a headband. The headset body includes an ear shell, a circuit board, a speaker, a microphone, and ear tips. The speaker and circuit board are installed in the ear shell, and the headband is connected to the ear shell. A baffle is also provided in the ear shell, forming a sealed acoustic cavity between the baffle and the ear shell. The speaker is disposed in the sealed acoustic cavity, and a sound output area with a sound-transmitting hole is provided on the area of ​​the baffle facing the speaker. A sound output area is provided in front of the baffle. An ear cup support is provided, and a sealing ring is provided between the ear cup support and the baffle to form a buffer cavity. A through hole is provided in the ear cup support aligned with the buffer cavity. An ear cotton is placed in the buffer cavity, and the ear cotton completely fills the buffer cavity and seals the sound outlet area of ​​the baffle and the through hole of the ear cup support. The ear cup is fixed on the ear cup support and surrounds the through hole of the ear cup support. The ear cotton is exposed in the ear cup and the through hole of the ear cup support. The ear cup, ear cotton, sealing ring and baffle form a passive noise reduction structure.

[0005] Furthermore, a sealing groove is provided around the sound output area in the baffle, and a sealing ring is placed in the sealing groove. The ear cup bracket presses on the sealing ring to form a buffer cavity.

[0006] Furthermore, a groove is provided on the front of the ear cup, which divides the front of the ear cup into inner and outer parts around the through hole in the middle of the ear cup.

[0007] Furthermore, the ear cup includes a covering layer, a silicone body, a sponge, and a base plate. The sponge is fixed on the base plate, the silicone body is placed on the sponge, and the covering layer covers the outer surface of the silicone body, the sponge, and the base plate. The covering layer is made of TPU material, and the base plate is made of PVC material. Ventilation holes are provided on the side of the ear cup, through which the inside and outside of the ear cup are connected.

[0008] Furthermore, several sound holes are provided on the baffle next to the sound output area, and a tuning mesh is provided on the back of the baffle aligned with the sound holes, covering each sound hole; each sound hole is located within the area surrounded by the sealing ring, and the tuning mesh is located in the sealed sound cavity.

[0009] Furthermore, the microphone includes a built-in microphone and an external microphone, with the built-in microphone located in one side of the earphone body and the external microphone located in the microphone boom of the other side of the earphone body.

[0010] Furthermore, a connector hole is provided on the headphone body with the microphone rod, and the microphone rod is inserted into the connector hole to connect with the headphone body.

[0011] Furthermore, rubber plugs are provided inside the earcup at the positions aligned with the plug hole and the power connector, while a sealing cap is provided outside the earcup to seal the plug hole and the power connector; a microphone mesh is provided at the position aligned with the built-in microphone.

[0012] Furthermore, control buttons are located on the back of the earphone body, which has a built-in microphone.

[0013] Preferably, the ear cotton is made of a mixture of wool and sound-absorbing fibers.

[0014] This invention utilizes a baffle inside the earphone body, along with a sealing ring, to secure the ear cotton and ear tips as a passive noise-canceling structure. This effectively absorbs external noise, preventing it from reaching the wearer's ears and improving the passive noise-canceling effect. Furthermore, the ear cotton and ear tips provide a better fit to the ear, and the flexible materials used in contact with the ear enhance ergonomics and comfort. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the main body of the earphone of this utility model;

[0017] Figure 3A structural diagram of the earphone body after the ear tips have been removed;

[0018] Figure 4 for Figure 3 Structural diagram after removing the ear cover support;

[0019] Figure 5 for Figure 4 A structural diagram after the ear cotton has been removed from the original structure;

[0020] Figure 6 for Figure 5 Structural diagram after removing the baffle plate from the foundation;

[0021] Figure 7 This is an exploded view of the ear cover.

[0022] In the diagram, 1 is the ear shell, 11 is the rubber plug, 12 is the sealing cap, 13 is the microphone mesh, 14 is the control button, 2 is the circuit board, 3 is the speaker, 4 is the baffle, 41 is the sound output area, 42 is the sealing groove, 43 is the sound hole, 44 is the sealing ring, 45 is the tuning mesh, 5 is the ear tip bracket, 6 is the ear tip, 61 is the groove, 62 is the covering layer, 63 is the silicone body, 64 is the sponge, 65 is the base plate, 7 is the ear cotton, 8 is the headband, and 9 is the microphone rod. Detailed Implementation

[0023] In this embodiment, refer to Figures 1-7 The aforementioned Bluetooth headphones with passive noise cancellation include a headphone body and a headband 8. The headphone body includes an ear shell 1, a circuit board 2, a speaker 3, a microphone, and ear tips 6. The speaker 3 and circuit board 2 are installed in the ear shell 1. The headband 8 is connected to the ear shell 1 and can achieve an adjustable angle of 48 degrees, allowing the ear tips 6 to better fit the face and provide optimal wearing comfort. A baffle 4 is provided in the ear shell 1, forming a sealed acoustic cavity between the baffle 4 and the ear shell 1. The speaker 3 is located in this sealed acoustic cavity. A sound output area 41 with a sound-transmitting hole is provided on the baffle 4 in the area facing the speaker 3, allowing sound to pass through the sound output area 41. The sound is emitted through an earpiece bracket 5 positioned in front of the baffle 4. A sealing ring 44 is placed between the earpiece bracket 5 and the baffle 4, forming a buffer cavity. A through hole is provided in the earpiece bracket 5 aligned with the buffer cavity. An earwax 7 is placed in the buffer cavity, completely filling the buffer cavity and sealing the sound outlet area 41 of the baffle 4 and the through hole of the earpiece bracket 5. An earpiece 6 is fixed to the earpiece bracket 5 and surrounds the through hole of the earpiece bracket 5. The earwax 7 is exposed in the earpiece 6 and the through hole of the earpiece bracket 5. The earpiece 6 covers the ear, and the earwax 7 is close to the ear, which provides better comfort. The passive noise reduction structure formed by the earpiece 6, earwax 7, sealing ring 44, and baffle 4 can achieve better noise reduction effect.

[0024] A sealing groove 42 is provided around the sound output area 41 in the baffle 4, and a sealing ring 44 is placed in the sealing groove 42. The ear cup bracket 5 is pressed on the sealing ring 44 to form a buffer cavity.

[0025] A groove 61 is provided on the front of the earbud 6. The groove 61 divides the front of the earbud 6 into two parts (inner and outer rings) around the through hole in the middle of the earbud 6. When worn, the groove can form a simulated vacuum layer, which, together with the passive noise cancellation structure, can achieve a high-frequency passive noise cancellation effect of 20-30dB.

[0026] Reference Figure 7 The earcup 6 includes a covering layer 62, a silicone body 63, a sponge 64, and a base plate 65. The sponge 64 is fixed on the base plate 65, the silicone body 63 is placed on the sponge 64, and the covering layer 62 covers the outer surfaces of the silicone body 63, the sponge 64, and the base plate 65. The covering layer 62 is made of TPU material, and the base plate 65 is made of PVC material. Ventilation holes are provided on the side of the earcup 6 to connect the inside and outside of the earcup 6, which is beneficial for the earcup 6 to remember and reset.

[0027] Several sound holes 43 are provided on the baffle 4 next to the sound output area 41. A tuning mesh 45 is provided on the back of the baffle 4, aligned with the sound holes 43, and covers each sound hole 43. Each sound hole 43 is located within the area surrounded by the sealing ring 44, and the tuning mesh 45 is located in the sealed sound cavity, which can increase the buffering effect.

[0028] The microphone includes a built-in microphone and an external microphone. The built-in microphone is located in one side of the earpiece, while the external microphone is located in the microphone boom 9 on the other earpiece. Both microphones simultaneously receive sound. The external microphone, through a combination of electronic hardware and software, captures the user's voice signal in real time. The received voice signal is then converted from analog to digital, processed by software algorithms, and mixed with the other party's voice signal before being output to the earpiece speaker 3 to achieve a sidetone function, allowing the user to hear their own voice during calls.

[0029] A connector hole is provided on the headphone body with the microphone rod 9. The microphone rod 9 is inserted into the connector hole and connected to the headphone body.

[0030] Inside the earpiece 1, there are rubber plugs 11 at the positions aligned with the plug hole and the power plug interface. On the outside of the earpiece 1, there is a sealing cover 12 to seal the plug hole and the power plug interface. This provides good waterproof (sweatproof) and dustproof effects, which is beneficial for outdoor use. A microphone net 13 is provided at the position aligned with the built-in microphone to prevent dust from entering the built-in microphone.

[0031] On the back of the headset, which has a built-in microphone, there is a control button 14 for turning the headset on and off and adjusting the volume.

[0032] The ear cotton 7 is made of a blend of wool and sound-absorbing fibers, which has good skin-friendliness, is very comfortable to wear, protects the wearer's hearing, and can effectively absorb external noise.

[0033] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A Bluetooth headset with passive noise cancellation, comprising a headset body and a headband, the headset body including an ear shell, a circuit board, a speaker, a microphone, and ear tips, the speaker and circuit board being installed in the ear shell, and the headband being connected to the ear shell, characterized in that: A baffle is also provided in the ear shell, forming a sealed acoustic cavity between the baffle and the ear shell. The speaker is placed in this sealed acoustic cavity, and a sound output area with a sound-transmitting hole is provided on the area of ​​the baffle facing the speaker. An ear cup bracket is provided in front of the baffle, and a sealing ring is provided between the ear cup bracket and the baffle, forming a buffer cavity. A through hole is provided in the ear cup bracket, aligned with the position of the buffer cavity. An ear cotton is placed in the buffer cavity, completely filling the buffer cavity and sealing the sound output area of ​​the baffle and the through hole of the ear cup bracket. The ear cup is fixed on the ear cup bracket and surrounds the through hole of the ear cup bracket. The ear cotton is exposed in the ear cup and the through hole of the ear cup bracket. The ear cup, ear cotton, sealing ring and baffle form a passive noise reduction structure.

2. The Bluetooth headphones with passive noise cancellation according to claim 1, characterized in that: A sealing groove is provided around the sound output area in the baffle, and a sealing ring is placed in the sealing groove. The ear cup bracket presses on the sealing ring to form a buffer cavity.

3. The Bluetooth headphones with passive noise cancellation according to claim 1, characterized in that: A groove is provided on the front of the ear cup, which divides the front of the ear cup into inner and outer parts around the through hole in the middle of the ear cup.

4. The Bluetooth headset with passive noise cancellation according to claim 1 or 3, characterized in that: The ear cup includes a covering layer, a silicone body, a sponge, and a base plate. The sponge is fixed on the base plate, the silicone body is placed on the sponge, and the covering layer covers the outer surface of the silicone body, the sponge, and the base plate. The covering layer is made of TPU material, and the base plate is made of PVC material. Ventilation holes are provided on the side of the ear cup to connect the inside and outside of the ear cup.

5. The Bluetooth headphones with passive noise cancellation according to claim 2, characterized in that: Several sound holes are provided on the baffle next to the sound output area. A tuning mesh is provided on the back of the baffle, aligned with the sound holes, covering each sound hole. Each sound hole is located within the area surrounded by a sealing ring, and the tuning mesh is located in the sealed sound cavity.

6. The Bluetooth headphones with passive noise cancellation according to claim 1, characterized in that: The microphone includes a built-in microphone and an external microphone. The built-in microphone is located in the earphone body on one side, and the external microphone is located in the microphone stick on the other earphone body.

7. The Bluetooth headphones with passive noise cancellation according to claim 6, characterized in that: The headphone body, which is equipped with a microphone rod, has a plug hole. The microphone rod is inserted into the plug hole and connected to the headphone body through a connector.

8. The Bluetooth headphones with passive noise cancellation according to claim 7, characterized in that: Rubber plugs are provided inside the earcups at the positions aligned with the connector and the power connector, while a sealing cap is provided on the outside of the earcups to seal the connector and the power connector; a microphone mesh is provided at the position aligned with the built-in microphone.

9. The Bluetooth headset with passive noise cancellation according to claim 6, characterized in that: Control buttons are located on the back of the headset, which has a built-in microphone.

10. The Bluetooth headphones with passive noise cancellation according to claim 1, characterized in that: The ear cotton is made of a mixture of wool and sound-absorbing fibers.

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