Error microphone holder for automotive active noise cancellation commissioning

Abstract

The application provides an error microphone support for automobile active noise reduction debugging, and belongs to the technical field of noise reduction debugging, and comprises a mounting unit, an adjusting unit and a telescopic unit. The mounting unit comprises a mounting base, two clamping structures and a suction structure. A mounting groove is formed in the side wall of the mounting base, and a suction cavity is formed in the bottom wall of the mounting base. The two clamping structures are arranged in the mounting groove. The clamping structure comprises two fixing rings and two telescopic pieces. The telescopic piece is fixedly connected between the fixing ring and the inner wall of the mounting groove. The suction structure comprises a piston slidingly arranged in the suction cavity and a transmission assembly transmissionally connected between the telescopic piece and the piston. The telescopic piece drives the piston to move along the axial direction of the suction cavity through the transmission assembly. The adjusting unit comprises an adjusting seat and a debugging seat connected to the adjusting seat in a universal manner. The debugging seat is provided with a suction site for mounting an error microphone. The telescopic unit is arranged between the adjusting seat and the mounting base. The application can match different mounting positions.

Description

Technical Field

[0001] This invention belongs to the technical field of noise reduction tuning, specifically relating to an error microphone bracket for active noise reduction tuning in automobiles. Background Technology

[0002] In the development and debugging of automotive active noise cancellation systems, error microphones need to be deployed inside the vehicle to collect residual noise signals, thereby optimizing noise cancellation algorithm parameters. The installation position, angle, and stability of the error microphones directly affect signal quality and debugging efficiency. Currently, common installation methods mainly rely on temporary fixation using existing vehicle structures, such as using specially designed clamping devices to mount the error microphone bracket to the headrest bar of the car seat. This method provides a relatively stable support base to a certain extent and has become a common practice in the industry.

[0003] However, relying on headrest bars as the sole fixed base for mounting has significant limitations. The diverse interior structures of automobiles mean that different models and seating areas (such as the rear center seat, near the door panels, or above the dashboard) may not have suitable or standardized headrest bars available, or their locations may deviate from the ideal acoustic measurement points. This severely restricts the installation scenarios for existing brackets, often leaving engineers with nowhere to install them or unsuitable installation locations when conducting multi-point noise mapping across the entire vehicle or dealing with specific vehicle models. Summary of the Invention

[0004] This invention provides an error microphone bracket for adjusting active noise cancellation in automobiles, aiming to solve the technical problem that inconsistent headrest rod specifications lead to brackets being unable to be installed or having unsatisfactory installation positions.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide an error microphone bracket for automotive active noise cancellation tuning, comprising:

[0006] The mounting unit includes a mounting base, two clamping structures, and an adsorption structure. The mounting base has a mounting groove on its side wall and an adsorption cavity on its bottom wall. The two clamping structures are located in the mounting groove. Each clamping structure includes two opposing fixed rings and two telescopic members respectively located on opposite sides of the two fixed rings. The telescopic members are fixed between the fixed rings and the inner wall of the mounting groove and extend and retract in a first direction. The adsorption structure includes a piston slidably disposed in the adsorption cavity and a transmission assembly that drives the telescopic members and the piston. The telescopic members drive the piston to move axially along the adsorption cavity through the transmission assembly.

[0007] The adjustment unit includes an adjustment base and a test base universally connected to the adjustment base, the test base having a magnetic attachment for mounting an error microphone; and

[0008] A telescopic unit is disposed between the adjusting seat and the mounting base, and the telescopic unit extends and retracts along a second direction.

[0009] In one possible implementation, the transmission component corresponds one-to-one with the telescopic component;

[0010] The transmission assembly includes:

[0011] A transmission block is slidably disposed in the adsorption cavity, the transmission block moves along the axial direction of the adsorption cavity, and a pressure-bearing surface is provided at the bottom of the transmission block;

[0012] The connecting rod is fixed between the transmission block and the piston; and

[0013] A transmission plate is inserted through the mounting base, with one end of the transmission plate extending into the adsorption cavity and abutting against the pressure surface, and the other end of the transmission plate being fixedly connected to the telescopic end of the telescopic member.

[0014] In one possible implementation, the mounting base is fixed with a sealing gasket at the port of the adsorption chamber.

[0015] In one possible implementation, the clamping structure further includes:

[0016] Two movable rings are slidably connected to two fixed rings, respectively, and the movable rings move along the axial direction of the fixed rings; and

[0017] Two movable components are connected to the movable ring in a one-to-one transmission manner, and the movable components are used to drive the movable ring to move.

[0018] In one possible implementation, a pressure sensor, communicatively connected to the telescopic member, is installed on the inner wall of the movable ring. The pressure sensor is used to detect the pressure exerted on the movable ring.

[0019] In one possible implementation, the telescopic unit includes:

[0020] A fixed rod is attached to the mounting base and extends along the second direction;

[0021] A movable rod is slidably mounted on the fixed rod. The movable rod moves along the second direction. The end of the movable rod away from the fixed rod is fixed to the adjusting seat. A material cavity is opened inside the movable rod.

[0022] The elastic structure includes an elastic member fixed between the fixed rod and the movable rod, and a helical spring fixed between the fixed rod and the movable rod, wherein the helical spring has a variable cavity; and

[0023] A transfer member, connected to the material cavity and the variable cavity, is used to transfer contents within the material cavity and the variable cavity.

[0024] In one possible implementation, the inlet of the material chamber is provided with a charge eliminator, and the inlet of the variable chamber is provided with a discharger.

[0025] In one possible implementation, the adjusting seat has an adjusting groove on the side opposite to the mounting base;

[0026] The adjustment unit includes an adjustment rod connected to the adjustment seat, multiple adjustment structures arranged around the axis of the adjustment rod, an extension rod rotatably connected to the adjustment rod, and a drive member pulsatingly connected to the extension rod. The rotation axis of the extension rod is parallel to the first direction. The drive member is used to drive the extension rod to rotate. The end of the extension rod away from the adjustment rod is universally hinged to the adjustment seat. Damping is provided at the connection between the extension rod and the adjustment seat.

[0027] The adjustment structure includes:

[0028] The clamping piece abuts against the outer periphery of the adjusting rod;

[0029] A slide block is slidably connected to the inner wall of the adjustment groove. The slide block has a first state of being fixed to the inner wall of the adjustment groove and a second state of being slidable to the inner wall of the adjustment groove.

[0030] A switching component, connected to the slide, is used to switch the slide between a first state and a second state; and

[0031] The elastic rod is hinged at one end to the clamping plate and at the other end to the slide block, and the elastic element extends and retracts along its own axis.

[0032] In one possible implementation, the switching assembly includes a fastening airbag disposed inside the slide and a pneumatic component connected to the fastening airbag, the pneumatic component being used to inflate or de-inflate the fastening airbag.

[0033] In one possible implementation, a friction pad is fixed to the inner side of the clamping piece.

[0034] The error microphone bracket for active noise cancellation tuning in automobiles provided by this invention, compared with the prior art, features a coordinated design of clamping and adsorption structures in the mounting unit. This allows the bracket to be reliably clamped to the headrest bar as in the traditional way, and also to be firmly adsorbed onto surfaces such as the dashboard, door panel, and roof where there are no bars to hold it, through the generated negative pressure. This completely eliminates the dependence on a single type of support structure and greatly expands the applicable scenarios and vehicle models for tuning. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the error microphone bracket used for active noise cancellation tuning in automobiles, according to an embodiment of the present invention.

[0036] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0037] Figure 3 This is a cross-sectional view illustrating the transmission assembly in an embodiment of the present invention;

[0038] Figure 4 This is a cross-sectional view illustrating the telescopic unit in an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram illustrating the structure of the adjustment unit in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10. Mounting unit; 101. Mounting base; 1011. Mounting groove; 1012. Adsorption chamber; 102. Fixing ring; 103. Telescopic component; 104. Piston; 105. Transmission block; 1051. Pressure surface; 106. Connecting rod; 107. Transmission plate; 108. Moving ring;

[0042] 20. Adjustment unit; 201. Adjustment seat; 2011. Adjustment groove; 202. Adjustment seat; 203. Adjustment rod; 204. Extension rod; 205. Driving component; 206. Clamping piece; 207. Slide; 208. Spring rod;

[0043] 30. Telescopic unit; 301. Fixed rod; 302. Moving rod; 3021. Material cavity; 303. Transfer component; 304. Elastic component; 305. Helical spring; 3051. Variable cavity. Detailed Implementation

[0044] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0045] Please refer to the following: Figures 1 to 5 This invention describes an error microphone bracket for automotive active noise cancellation tuning. An error microphone bracket for automotive active noise cancellation tuning includes a mounting unit 10, an adjustment unit 20, and a telescopic unit 30. The mounting unit 10 includes a mounting base 101, two clamping structures, and an adsorption structure. The mounting base 101 has a mounting groove 1011 on its side wall and an adsorption cavity 1012 on its bottom wall. The two clamping structures are located within the mounting groove 1011. Each clamping structure includes two opposing fixing rings 102 and two telescopic members 103 respectively located on opposite sides of the two fixing rings 102. The telescopic members 103 are fixed between the fixing rings 102 and the inner wall of the mounting groove 1011. The telescopic component 103 is a telescopic oil cylinder, electric cylinder, or hydraulic cylinder. The adsorption structure includes a piston 104 slidably disposed in the adsorption chamber 1012 and a transmission assembly that is drively connected to the telescopic component 103 and the piston 104. The telescopic component 103 drives the piston 104 to move axially along the adsorption chamber 1012 through the transmission assembly. The adjustment unit 20 includes an adjustment seat 201 and an adjustment seat 202 universally connected to the adjustment seat 201. The adjustment seat 202 has an adsorption position for installing an error microphone, which is achieved by negative pressure adsorption or electromagnetic adsorption. The telescopic unit 30 is disposed between the adjustment seat 201 and the mounting base 101, and the telescopic unit 30 extends and retracts in a second direction.

[0046] The error microphone bracket for automotive active noise cancellation tuning provided in this embodiment, when installed, first operates the clamping structure: two telescopic members 103 located in the mounting slot 1011 extend or retract synchronously in a first direction, driving two oppositely arranged fixing rings 102 to move towards each other, thereby clamping a rod-like structure inside the vehicle, such as a headrest rod. The mechanical force of this clamping action is synchronously transmitted to the transmission component; if the headrest rod is not suitable for installation, the two fixing rings 102 can also be driven to move by the telescopic members 103, and the mounting base 101 is fixed to the dashboard, door panel, roof, or other locations by adsorption connection.

[0047] Then, the microphone positioning and debugging are carried out: the telescopic unit 30 starts to work, and it extends and retracts along the second direction, which drives the adjustment seat 201 connected to it and the entire adjustment unit 20 to extend or retract; then, using the universal connection structure between the adjustment seat 201 and the debugging seat 202, the debugging seat 202 and the error microphone installed on it are finally adjusted, thereby completing the entire deployment process.

[0048] Compared with existing technologies, the coordinated design of the clamping structure and the adsorption structure in the installation unit 10 enables the bracket to be reliably clamped to the headrest bar as in the traditional way, and can also be firmly adsorbed to surfaces such as the dashboard, door panel, and roof where there is no bar to rely on through the generated negative pressure. This completely eliminates the dependence on a single type of support structure and greatly expands the applicable scenarios and vehicle models for debugging.

[0049] Based on this, the error microphone is positioned by the telescopic unit 30 and the adjustment unit 20. The combination of the two ensures that the microphone can be positioned to the desired optimal spatial position and direction.

[0050] In some embodiments, see Figure 2 The transmission components correspond one-to-one with the telescopic components 103.

[0051] The transmission assembly includes a transmission block 105, a connecting rod 106, and a transmission plate 107. The transmission block 105 is slidably disposed in the adsorption chamber 1012 and moves axially along the adsorption chamber 1012. A pressure-bearing surface 1051 is provided at the bottom of the transmission block 105. The connecting rod 106 is fixedly connected between the transmission block 105 and the piston 104. The transmission plate 107 passes through the mounting base 101. One end of the transmission plate 107 extends into the adsorption chamber 1012 and abuts against the pressure-bearing surface 1051. The other end of the transmission plate 107 is fixedly connected to the telescopic end of the telescopic member 103.

[0052] When installing and fixing the headrest, if it cannot be installed at the headrest rod, an adsorption connection is selected. Then, the telescopic components 103 are activated, and the telescopic ends of the two telescopic components 103 move in opposite directions. Since one end of the transmission plate 107 is fixedly connected to the corresponding telescopic end of the telescopic component 103, the transmission plate 107 is directly pushed into the adsorption cavity 1012 and continuously presses against the pressure surface 1051 of the transmission block 105. This pressure surface 1051 is designed as an inclined plane or a specific curved surface.

[0053] When the transmission plate 107 presses against the pressure surface 1051, the end of the transmission plate 107 slides along the contour of the pressure surface 1051. Due to the guiding effect of the inclined plane, the horizontal thrust is decomposed into a vertical component force. This component force forces the transmission block 105 to slide upward along the axial direction of the adsorption cavity 1012. The transmission block 105 is rigidly connected to the piston 104 through the connecting rod 106. Therefore, the upward movement of the transmission block 105 directly drives the piston 104 to move upward in the adsorption cavity 1012, thereby generating a negative pressure in the adsorption cavity 1012, and finally forming the adsorption force required to firmly adsorb the entire mounting base 101 onto the vehicle interior surface.

[0054] In some embodiments, the mounting base 101 is fixed with a sealing gasket at the port of the adsorption chamber 1012.

[0055] Because the sealing gasket is made of highly elastic materials such as rubber and silicone, it will adapt to the contour of the contact surface under the weight of the mounting base 101 or a slight external force. This deformation allows the contact surface of the sealing gasket to fit tightly against the potentially uneven interior surface, effectively blocking the peripheral path of air flowing directly from the outside into the adsorption chamber 1012.

[0056] In some embodiments, see Figure 1 and Figure 2 The clamping structure also includes two movable rings 108 and two movable components; the two movable rings 108 are slidably connected to the two fixed rings 102 respectively, and the movable rings 108 move along the axial direction of the fixed rings 102; the two movable components are connected to the movable rings 108 in a one-to-one transmission connection, and the movable components are used to drive the movable rings 108 to move.

[0057] It should be noted that the two fixing rings 102 have a height difference.

[0058] Optionally, the moving part is an air pump, which generates positive and negative pressure by pumping or inflating air, thereby causing the moving ring 108 to extend and form a closed loop with the fixed ring 102, or causing the moving ring 108 to retract and form an open loop with the fixed ring 102.

[0059] Optionally, the moving part is an arc-shaped slide rail, which will not be described in detail here.

[0060] When the headrest rod is ready for installation, the telescopic component 103 activates, causing the fixing ring 102 to abut against the headrest rod. Then, the movable component activates, causing the movable ring 108 to extend and form a closed loop. The telescopic component 103 then moves in the opposite direction until the movable ring 108 abuts against the headrest rod. Simultaneously, the telescopic component 103 moves in the opposite direction, pulling the piston 104 upwards via the transmission assembly, thereby generating negative pressure. This attracts the mounting base 101 onto the seat. The headrest rod is secured by the intersection of two closed loops, and the attraction further aids in fixation. This not only accommodates headrest rods of different diameters but also enhances installation stability.

[0061] When the headrest rod cannot be installed, the two telescopic components 103 start to move in opposite directions. The telescopic components 103 drive the piston 104 to move upward through the transmission assembly, thereby generating negative pressure and thus adsorbing and fixing the mounting base 101.

[0062] In some embodiments, a pressure sensor is installed on the inner wall of the movable ring 108, which is communicatively connected to the telescopic member 103. The pressure sensor is used to detect the pressure on the movable ring 108.

[0063] This solution introduces real-time, quantifiable force sensing and intelligent control capabilities into the clamping process, thereby improving installation reliability while effectively preventing potential damage to automotive interior components. Traditional clamping operations rely on the operator's experience and feel, making it difficult to precisely control the force. When clamping headrest rods covered in leather or plastic, excessive clamping force may cause permanent indentations or even structural damage to the surface, while insufficient force cannot guarantee the stability of the bracket under vehicle vibration. This solution directly measures the contact pressure between the clamping ring and the rod using pressure sensors, converting the physical contact signal into a monitorable electrical signal. This allows technicians or automatic control systems to accurately know the current clamping status. This represents a leap from "relying on feeling" to "having data," protecting the vehicle's interior.

[0064] In some embodiments, see Figure 1 and Figure 4 The telescopic unit 30 includes a fixed rod 301, a movable rod 302, an elastic structure, and a transfer member 303. The fixed rod 301 is fixed to the mounting base 101 and extends along a second direction. The movable rod 302 is slidably disposed on the fixed rod 301 and moves along the second direction. One end of the movable rod 302 away from the fixed rod 301 is fixed to the adjusting seat 201. A material cavity 3021 is formed inside the movable rod 302. The elastic structure includes an elastic member 304 fixed between the fixed rod 301 and the movable rod 302, and a helical spring 305 fixed between the fixed rod 301 and the movable rod 302. A variable cavity 3051 is formed inside the helical spring 305. The elastic member 304 is a conventional spring. The transfer member 303 communicates with the material cavity 3021 and the variable cavity 3051. The transfer member 303 is used to transfer contents within the material cavity 3021 and the variable cavity 3051. The transfer member 303 is a pellet pump.

[0065] When the telescopic unit 30 needs to be extended, the transfer member 303 gradually transfers the contents of the variable cavity 3051 into the material cavity 3021, thereby reducing the elastic coefficient of the coil spring 305, causing the elastic member 304 to release its elastic force until the telescopic unit 30 is extended to the required length; when the telescopic unit 30 needs to be retracted, the transfer member 303 gradually transfers the contents of the material cavity 3021 into the variable cavity 3051, thereby increasing the elastic coefficient of the coil spring 305, causing the elastic member 304 to be compressed until the telescopic unit 30 is shortened to the required length.

[0066] In some embodiments, the inlet of the material chamber 3021 is provided with a charge eliminator, and the inlet of the variable chamber 3051 is provided with a discharger.

[0067] By configuring the discharger to apply the same type of charge to the contents before transfer, thus giving them a uniform, same-type static charge, this design offers two advantages: First, at the electrical level, because the contents particles or droplets pre-carry the same type of charge, their movement in the subsequent transfer channel is less affected by the repulsive effect of like charges, reducing close contact and friction with the tube wall. This significantly suppresses the generation of new, random static electricity from the source, reducing the risk of electrical noise interference to high-sensitivity error microphones and ensuring the purity of the acoustic signal. Second, at the mechanical level, when these contents carrying the same type of charge enter the variable cavity 3051, the mutual repulsion between charges drives the contents to automatically tend to disperse uniformly within the cavity, preventing them from accumulating or depositing in a certain area of ​​the chamber. This uniform distribution makes the density or pressure distribution of the damping medium inside the helical spring 305 more consistent.

[0068] The contents entering the material chamber 3021 from the variable cavity 3051 will pass through the charge eliminator, causing the charge carried by the contents to dissipate.

[0069] In some embodiments, see Figure 1 and Figure 5 An adjustment groove 2011 is provided on the side of the adjustment seat 201 away from the mounting base 101.

[0070] The adjustment unit 20 includes an adjustment rod 203 connected to the adjustment seat 201, a plurality of adjustment structures arranged around the axis of the adjustment rod 203, an extension rod 204 rotatably connected to the adjustment rod 203, and a drive member 205 transmissionally connected to the extension rod 204. The rotation axis of the extension rod 204 is parallel to a first direction. The drive member 205 is used to drive the extension rod 204 to rotate. One end of the extension rod 204 away from the adjustment rod 203 is universally hinged to the adjustment seat 202. The connection between the extension rod 204 and the adjustment seat 202 is provided with damping.

[0071] The adjustment structure includes a clamping plate 206, a slide block 207, a switching assembly, and a spring rod 208; the clamping plate 206 abuts against the outer periphery of the adjusting rod 203; the slide block 207 is slidably connected to the inner wall of the adjusting groove 2011, and the slide block 207 has a first state fixed to the inner wall of the adjusting groove 2011 and a second state sliding to the inner wall of the adjusting groove 2011; the switching assembly is connected to the slide block 207, and the switching assembly is used to switch the slide block 207 between the first state and the second state; one end of the spring rod 208 is hinged to the clamping plate 206, and the other end is hinged to the slide block 207, and the elastic element 304 extends and retracts along its own axis, and the elastic element 304 is a spring rod.

[0072] When the slide 207 is fixed, multiple spring rods 208 work together to pull the clamping plate 206 to evenly tighten the adjusting rod 203 from all sides, forming a strong radial locking force, thereby fixing the adjusting rod 203 to the adjusting seat 201; when the slide 207 is movable, the position of the adjusting rod 203 relative to the adjusting seat 201 can be moved arbitrarily as needed, thereby adjusting the position of the error microphone.

[0073] In some embodiments, the switching assembly includes a fastening airbag disposed inside the slide 207 and a pneumatic component connected to the fastening airbag. The pneumatic component is used to blow or de-air the fastening airbag and is an air pump.

[0074] When the locking airbag inflates, its flexible body adaptively fills the space between the slide 207 and the inner wall of the adjusting groove 2011, and evenly converts the air pressure into normal pressure on the entire contact surface of the slide 207. This generates a large and evenly distributed static friction force, ensuring the absolute stability of the slide 207 in the locked state and effectively resisting vibration. The magnitude of this locking force can be precisely controlled by adjusting the inflation pressure, achieving a combination of flexible force application and rigid locking. This avoids structural damage that may be caused by excessive local stress and ensures the reliability of the locking.

[0075] In one possible implementation, a friction pad is fixed to the inside of the clamping piece 206.

[0076] Because the friction pad material is soft and highly viscous, under normal pressure, its surface microstructure will adaptively embed into the tiny processing textures or oxide layers on the surface of the adjusting rod 203, greatly increasing the actual contact area and mechanical interlocking effect between the two.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An error microphone bracket for automotive active noise cancellation tuning, characterized in that, include: The mounting unit includes a mounting base, two clamping structures, and an adsorption structure. The mounting base has a mounting groove on its side wall and an adsorption cavity on its bottom wall. The two clamping structures are located in the mounting groove. Each clamping structure includes two opposing fixed rings and two telescopic members respectively located on opposite sides of the two fixed rings. The telescopic members are fixed between the fixed rings and the inner wall of the mounting groove and extend and retract in a first direction. The adsorption structure includes a piston slidably disposed in the adsorption cavity and a transmission assembly that drives the telescopic members and the piston. The telescopic members drive the piston to move axially along the adsorption cavity through the transmission assembly. The adjustment unit includes an adjustment base and a test base universally connected to the adjustment base, the test base having a magnetic attachment for mounting an error microphone; as well as A telescopic unit is disposed between the adjusting seat and the mounting base, and the telescopic unit extends and retracts along a second direction.

2. The error microphone bracket for automotive active noise cancellation tuning as described in claim 1, characterized in that, The transmission components correspond one-to-one with the telescopic components; The transmission assembly includes: A transmission block is slidably disposed in the adsorption cavity, the transmission block moves along the axial direction of the adsorption cavity, and a pressure-bearing surface is provided at the bottom of the transmission block; The connecting rod is fixed between the transmission block and the piston; and A transmission plate is inserted through the mounting base, with one end of the transmission plate extending into the adsorption cavity and abutting against the pressure surface, and the other end of the transmission plate being fixedly connected to the telescopic end of the telescopic member.

3. The error microphone bracket for automotive active noise cancellation tuning as described in claim 2, characterized in that, The mounting base is fixed with a sealing gasket at the port of the adsorption chamber.

4. The error microphone bracket for automotive active noise cancellation tuning as described in claim 1, characterized in that, The clamping structure also includes: Two movable rings are slidably connected to two fixed rings, respectively, and the movable rings move along the axial direction of the fixed rings; and Two movable components are connected to the movable ring in a one-to-one transmission manner, and the movable components are used to drive the movable ring to move.

5. The error microphone bracket for automotive active noise cancellation tuning as described in claim 4, characterized in that, A pressure sensor, which is connected to the telescopic component, is installed on the inner wall of the moving ring. The pressure sensor is used to detect the pressure on the moving ring.

6. The error microphone bracket for automotive active noise cancellation tuning as described in claim 1, characterized in that, The telescopic unit includes: A fixed rod is attached to the mounting base and extends along the second direction; A movable rod is slidably mounted on the fixed rod. The movable rod moves along the second direction. The end of the movable rod away from the fixed rod is fixed to the adjusting seat. A material cavity is opened inside the movable rod. The elastic structure includes an elastic member fixed between the fixed rod and the movable rod, and a helical spring fixed between the fixed rod and the movable rod, wherein the helical spring has a variable cavity; and A transfer member, connected to the material cavity and the variable cavity, is used to transfer contents within the material cavity and the variable cavity.

7. The error microphone bracket for automotive active noise cancellation tuning as described in claim 6, characterized in that, The material chamber is equipped with a charge eliminator at its inlet, and the variable chamber is equipped with a discharger at its inlet.

8. The error microphone bracket for automotive active noise cancellation tuning as described in claim 1, characterized in that, The adjusting seat has an adjusting groove on the side opposite to the mounting base; The adjustment unit includes an adjustment rod connected to the adjustment seat, multiple adjustment structures arranged around the axis of the adjustment rod, an extension rod rotatably connected to the adjustment rod, and a drive member pulsatingly connected to the extension rod. The rotation axis of the extension rod is parallel to the first direction. The drive member is used to drive the extension rod to rotate. The end of the extension rod away from the adjustment rod is universally hinged to the adjustment seat. Damping is provided at the connection between the extension rod and the adjustment seat. The adjustment structure includes: The clamping piece abuts against the outer periphery of the adjusting rod; A slide block is slidably connected to the inner wall of the adjustment groove. The slide block has a first state of being fixed to the inner wall of the adjustment groove and a second state of being slidable to the inner wall of the adjustment groove. A switching component, connected to the slide, is used to switch the slide between a first state and a second state; and The elastic rod is hinged at one end to the clamping plate and at the other end to the slide block, and the elastic element extends and retracts along its own axis.

9. The error microphone bracket for automotive active noise cancellation tuning as described in claim 8, characterized in that, The switching assembly includes a fastening airbag disposed inside the slide and a pneumatic component connected to the fastening airbag, the pneumatic component being used to blow or de-air the fastening airbag.

10. The error microphone bracket for automotive active noise cancellation tuning as described in claim 8, characterized in that, A friction pad is fixed to the inner side of the clamping plate.

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