Microphone vibration isolation mounting structure for desktop live broadcast

Abstract

The utility model relates to the technical field of live broadcast equipment, and discloses a microphone vibration isolation mounting structure for desktop live broadcast, which comprises a supporting seat, a mounting platform for clamping a microphone and a vibration isolation assembly arranged between the supporting seat and the mounting platform, the vibration isolation assembly comprises a first-stage vibration isolation unit, a middle inertia part and a second-stage vibration isolation unit which are sequentially connected, the first-stage vibration isolation unit is arranged between the supporting seat and the middle inertia part, and the second-stage vibration isolation unit is arranged between the middle inertia part and the mounting platform; the first-stage vibration isolation unit and the second-stage vibration isolation unit are each of a parallel structure of a directional compliant part and a damping part and are arranged between the corresponding adjacent connecting parts in parallel, the equivalent rigidity of the second-stage vibration isolation unit is 2-5 times that of the first-stage vibration isolation unit, and the equivalent rigidity of the second-stage vibration isolation unit is 2-5 times that of the second-stage vibration isolation unit. The inherent frequency of the second-stage vibration isolation unit is 1.8-2.5 times of the inherent frequency of the first-stage vibration isolation unit; the installation platform is provided with a cable decoupling structure, so that a cable led out of the installation platform forms a cable flexible section at the installation position.

Description

TECHNICAL FIELD

[0001] The utility model relates to live equipment technical field especially is concerned with a desktop live microphone vibration isolation mounting structure. BACKGROUND

[0002] In the desktop live and podcast scene, the condenser or moving coil microphone is usually connected with the desktop through the table clamp support arm, tripod or base. The mechanical vibration generated by the keyboard typing, mouse clicking, instrument placement and table modal in 5-200Hz is easily transmitted to the pickup end in turn according to the propagation path of the support structure-mounting interface-microphone shell, thereby causing the low-frequency rumbling sound and noise floor to rise.

[0003] In the prior art, the rubber band type suspension ("spider frame"), Lyre integrated flexible support or double / multi-stage suspension is usually adopted, and the measures such as outer shell damping patch are used to reduce the solid vibration transmission. However, when the parameters between stages are not fully tuned, the multi-stage suspension or double-stage vibration isolation structure is easy to have coupling resonance peaks: when the natural frequencies of each stage are close to each other, or the mass / stiffness distribution is unreasonable, the peaks are superimposed in adjacent frequency bands, resulting in that the vibration transmission rate of some frequency bands does not decrease but increases, and the low-frequency to mid-low-frequency vibration suppression effect is unstable.

[0004] Therefore, it is necessary to provide a microphone vibration isolation mounting structure for desktop live to solve the technical problems that the multi-stage coupling resonance peaks cause the frequency response of 5-200Hz frequency band to be not smooth and the vibration transmission rate of the key frequency band to be high. SUMMARY

[0005] The utility model aims at least solves one of the prior art technical problems.

[0006] To this end, one object of the utility model is to provide a microphone vibration isolation mounting structure for desktop live, comprising: a support seat, an installation platform for clamping a microphone, and a vibration isolation assembly arranged between the support seat and the installation platform; characterized in that: the vibration isolation assembly comprises a first-stage vibration isolation unit, an intermediate inertia piece and a second-stage vibration isolation unit connected in sequence, the first-stage vibration isolation unit is arranged between the support seat and the intermediate inertia piece, and the second-stage vibration isolation unit is arranged between the intermediate inertia piece and the installation platform; the first-stage vibration isolation unit and the second-stage vibration isolation unit are respectively configured as the parallel structure of the directional compliant member and the damping member, and are respectively arranged in parallel between the corresponding adjacent connecting components, wherein the equivalent stiffness of the second-stage vibration isolation unit is 2-5 times the equivalent stiffness of the first-stage vibration isolation unit, and the natural frequency of the second-stage vibration isolation unit is 1.8-2.5 times the natural frequency of the first-stage vibration isolation unit; the installation platform is provided with a cable decoupling structure to form a cable compliant section at the installation position.

[0007] In a possible implementation, the primary vibration isolation unit, the intermediate inertia member and the secondary vibration isolation unit are coaxially stacked along the same axis.

[0008] In a possible implementation, the intermediate inertia member is a coaxial ring-shaped counterweight or a disc-shaped counterweight, and is connected to the primary vibration isolation unit and the secondary vibration isolation unit through detachable rigid connecting members respectively.

[0009] In a possible implementation, the directional compliant member and the damping member of the secondary vibration isolation unit are configured as an integral ring-shaped structure.

[0010] In a possible implementation, a rotation-stopping mechanism or a linear guide mechanism is arranged between the secondary vibration isolation unit and the mounting platform to limit the rotational freedom of the mounting platform about a plane perpendicular to the mounting platform.

[0011] In a possible implementation, the directional compliant member of the primary vibration isolation unit and / or the secondary vibration isolation unit is a steel wire rope isolator.

[0012] In a possible implementation, a cable decoupling structure is arranged at the cable exit position of the mounting platform, so that the cable forms at least one loose loop, and the inner radius of the loose loop is 10-20 times the outer diameter of the cable.

[0013] In a possible implementation, the intermediate inertia member and the adjacent vibration isolation unit are rigidly and detachably connected through at least three circumferentially spaced apart spacer columns and mating threaded fasteners.

[0014] In a possible implementation, a displacement limiting structure is arranged between the secondary vibration isolation unit and the mounting platform, and the displacement limiting structure comprises a limiting stop ring and / or a buffer opposite to the mounting platform.

[0015] In a possible implementation, the angle between the main compliant direction of the primary vibration isolation unit and the secondary vibration isolation unit and the normal direction of the support seat is ≤20°.

[0016] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood to have the following beneficial effects through the practice of the present application.

[0017] The utility model provides a desktop live microphone vibration isolation mounting structure, sets up one level vibration isolation unit, intermediate inertia piece and two level vibration isolation unit between support base and installation platform, forms the vibration isolation structure of series arrangement. One level and two level vibration isolation unit all adopt the form of parallel connection of directional compliance piece and damping piece, set up respectively in its corresponding connecting portion. Through the equivalent stiffness ratio of two level vibration isolation unit and the matching relation of natural frequency, make the structure have good vibration isolation capacity in typical application frequency band. Among them, intermediate inertia piece is located between two level vibration isolation unit, forms the mass intermediary, plays the cutting function of vibration path in the vibration isolation process. Installation platform sets up cable decoupling structure, makes the outgoing cable form the compliance section in the connecting place, is favorable to reduce the rigidity of cable to the microphone platform. The overall structure is applicable to the installation use of microphone under desktop environment, can reduce vibration interference, improves the stability of sound pickup. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing make a simple introduction, obviously, the drawing in the following description is some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0019] Figure 1 The structure schematic diagram of the desktop live microphone vibration isolation mounting structure provided by the utility model embodiment is shown in the figure.

[0020] Figure 2 For Figure 1 The structure schematic diagram of the second view in the device shown in the figure.

[0021] Figure 3 For Figure 1 The structure schematic diagram of the third view in the device shown in the figure.

[0022] Mark explanation of drawing:

[0023] 1, support base, 2, installation platform, 3, vibration isolation assembly, 31, one level vibration isolation unit, 32, intermediate inertia piece, 33, two level vibration isolation unit, 4, directional compliance piece, 5, damping piece, 6, rotation stop mechanism, 7, cable decoupling structure, 8, displacement limiting structure. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, features limited by "one" and "two" can include one or more of the features explicitly or implicitly. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0026] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] Figure 1 A structural schematic diagram of a microphone vibration isolation mounting structure for desktop live broadcast provided by the embodiments of the present application is shown in the figure. Figure 2 A structural schematic diagram of a microphone vibration isolation mounting structure for desktop live broadcast provided by the embodiments of the present application is shown in the figure. Figure 1 A structural schematic diagram of a second viewing angle in the device shown in the figure. Figure 3 A structural schematic diagram of a second viewing angle in the device shown in the figure. Figure 2 A structural schematic diagram of a second viewing angle in the device shown in the figure.

[0029] Please refer to Figures 1-3 In a possible implementation, a microphone vibration isolation mounting structure for live broadcast includes a support base 1, a mounting platform 2 for clamping a microphone, and a vibration isolation assembly 3 arranged therebetween;

[0030] The vibration isolation assembly 3 includes a first-stage vibration isolation unit 31, an intermediate inertia element 32, and a second-stage vibration isolation unit 33 connected in sequence, the first-stage vibration isolation unit 31 is located between the support base 1 and the intermediate inertia element 32, and the second-stage vibration isolation unit 33 is located between the intermediate inertia element 32 and the mounting platform 2. The first-stage vibration isolation unit 31 and the second-stage vibration isolation unit 33 both adopt a structure in which a directional compliance element 4 and a damping element 5 are connected in parallel, and are respectively arranged in parallel between the corresponding adjacent connecting components; the equivalent stiffness of the two stages satisfies 2≤k2 / k1≤5, and the natural frequency satisfies fn2=(1.8~2.5)×fn1. The mounting platform 2 is provided with a cable decoupling structure 7, so that a cable compliance section is formed at the mounting position of the cable led out from the mounting platform 2, and the equivalent stiffness of the cable compliance section satisfies kc≤0.2×k1; at the same time, in order to ensure the alignment of the main compliance direction, the normal direction of the support base 1 is defined as an assembly reference axis, the directional compliance element 4 is checked for the included angle between the main compliance direction thereof and the reference axis after assembly through an angle gauge or a three-coordinate measuring head, and the result is recorded on an inspection card.

[0031] The above structure realizes step-by-step attenuation of vibration energy through two-stage series vibration isolation, the intermediate inertia element 32 forms a mass isolation node, so that the first-order natural frequency of the system approximately satisfies fn1≈(m1+m2) / k1, wherein m1 is the mass of the intermediate inertia element 32, and m2 is the combined mass of the mounting platform 2 and the microphone; and the second-order natural frequency approximately satisfies fn2≈(m1+m2) / k2. When k2 / k1 is controlled to be 2-5 and fn2 is designed to be 1.8-2.5 times fn1, the transfer rate curve presents a step-by-step attenuation characteristic, the amplification peak caused by coupled resonance is reduced, and the effective vibration isolation bandwidth from low frequency to medium frequency is expanded. The two-stage parallel damping elements 5 provide equivalent damping ratios ζ1 and ζ2, which are preferably 0.08-0.20, and the setting thereof can be identified through conversion of the loss factor η of a viscoelastic material and the equivalent ζ or a free decay experiment: after a small displacement of the mounting platform 2 near static equilibrium is released, the displacement or speed envelope is recorded, the logarithmic decrement δ is obtained by taking the ratio of adjacent peaks, and ζ is calculated by ζ≈δ / √(4π 2 +δ 2 )The cable compliance section weakens the mechanical bypass by forming a bending relaxation path, and the equivalent stiffness thereof can be calculated according to the approximate relationship kc≈C·(E·I) / L 3Estimation, where E is the equivalent elastic modulus of the cable sheath, I is the cross-sectional moment of inertia, L is the equivalent length of the relaxation section, C is a dimensionless coefficient related to curvature; After assembly, the constraint kc≤0.2×k1 is reviewed by small amplitude sweep frequency tension test. Thus, under the condition of relatively installed space and mass, the structure obtains steeper roll-off in the frequency band higher than fn2, the peak value of the transmission rate is reduced and the bandwidth is expanded; The mass isolation effect of the intermediate inertia part 32 reduces the peak displacement of the step and impact response, and shortens the 5% residual amplitude decay time; The cable decoupling suppresses the short circuit effect caused by the bypass stiffness, so that the theoretical isolation characteristics can be repeatedly realized in the device; The key parameters and test methods are clear, which is convenient for production consistency control and on-site review.

[0032] The directional compliant member 4 can adopt a thin plate spring, a fork spring, a spiral compression spring, a polymer flexible hinge or a wire rope vibration isolator, and its main compliant direction is aligned with the normal direction of the support base 1 as the reference; The damping member 5 can adopt a viscoelastic layer, a micro-porous elastomer or a small viscous damper, and is connected in parallel with the compliant member to refine ζ through thickness, pre-press or throttling parameters; The material and geometry of the intermediate inertia part 32 can be mass tuned by replacing the counterweight sheet to meet the target fn1; The cable decoupling can form a relaxation bending section or a relaxation ring at the outlet of the installation platform 2, and the curvature and the formed length are stabilized by low-friction guide members to reduce the dispersion of kc; The device allows vertical or small-angle inclined installation, but the included angle between the main compliant direction and the normal direction of the support base 1 should not exceed twenty degrees to reduce the cross-sensitivity.

[0033] Please refer to Figures 1-3 In a possible implementation, the primary vibration isolation unit 31, the intermediate inertia part 32 and the secondary vibration isolation unit 33 are coaxially stacked along the same axis. The support base 1 is provided with a central positioning hole, and the hole diameter and the positioning column adopt H7 / h7 fit; The lower surface of the intermediate inertia part 32 is provided with a coaxial counterbore and is slightly matched with the positioning column, and the upper surface is provided with a through hole to accommodate the central fastener of the secondary vibration isolation unit 33; The base of the secondary vibration isolation unit 33 is provided with an annular positioning sleeve, which is press-fitted with the upper surface counterbore of the intermediate inertia part 32, so that the three share a single central axis after assembly. The intermediate inertia part 32 and the adjacent vibration isolation unit are rigidly connected by three or four equidistant spacing columns in the circumferential direction, and the circumferential angle reference of the spacing column and the hole position is taken as the support base 1 centerline as the zero line, allowing a deviation of not more than ±0.5°; After assembly, the runout of the upper and lower end surfaces is not greater than 0.05mm measured by a dial indicator, and the coaxiality is not greater than 0.1mm / 100mm measured by a line laser alignment instrument.

[0034] In the coaxial stacking relationship, axial vibration from the support base 1 is transmitted to the intermediate inertia piece 32 through the first-stage vibration isolation unit 31 and then to the mounting platform 2 through the second-stage vibration isolation unit 33; the force and displacement are mainly transmitted along the axial component, the main compliance direction of the compliant member can be coincident with the normal direction of the support base 1, thereby reducing the lateral coupling stiffness and eccentric additional load. The damping member 5 is in a symmetrical force state, the energy dissipation is stable, the additional peak value caused by eccentricity in the transmission rate curve is suppressed, and the vibration isolation bandwidth and repeatability are consistent.

[0035] Please refer to Figures 1-3 In a possible implementation, the intermediate inertia piece 32 is made into a coaxial annular or disc-shaped counterweight and connected with the first-stage vibration isolation unit 31 and the second-stage vibration isolation unit 33 through detachable rigid connecting members respectively. The intermediate inertia piece 32 can be made of carbon steel or high-density alloy material, with a density range of 7.8-11.3 g / cm³, to ensure that the required additional mass is obtained without significantly increasing the volume. The outer shape can be selected as a whole disc or an annular shape with a central through hole to reduce weight or provide a passage for cables and fasteners.

[0036] In terms of assembly, the lower surface of the intermediate inertia piece 32 is connected with the first-stage vibration isolation unit 31 through three or four equally spaced spacer columns, the ends of the spacer columns are connected by threaded fasteners, and a specified pre-tightening force is applied to ensure rigid connection; the upper surface of the intermediate inertia piece 32 is connected with the second-stage vibration isolation unit 33 in the same way. The threaded connection can use M4-M6 fastener specifications, with a threaded strength grade not lower than 8.8, a tightening torque range of 3-6 N·m, and a threaded locking agent applied as necessary to prevent loosening during long-term use. Through this rigid and detachable connection method, the coaxial relationship and stiffness transmission between the intermediate inertia piece 32 and the adjacent vibration isolation units during operation can be ensured, and maintenance, replacement or adjustment of the counterweight can be facilitated when needed.

[0037] This structure enables the intermediate inertia piece 32 to play a stable mass blocking role in the transmission path, and the vibration isolation units on the upper and lower sides are rigidly connected to achieve direct force transmission, thereby avoiding additional flexibility caused by loose contact surfaces. By adjusting the outer diameter, thickness or material of the intermediate inertia piece 32, tuning can be achieved within the target first-order natural frequency range, so that the overall vibration isolation system has good low-frequency vibration isolation performance and good medium-high frequency attenuation effect.

[0038] Please refer to Figures 1-3In a possible implementation, the directional compliant member and the damping member of the secondary vibration isolation unit 33 are configured as an integral annular structure. The annular structure is composed of an annular steel wire rope vibration isolator and an annular damping member in parallel, connected to the mounting platform 2 at the upper end and to the intermediate inertia member 32 at the lower end, forming a continuous circumferential support. The annular steel wire rope vibration isolator is fixed in the annular clamp block by multiple strands of twisted steel wire, and the damping member uses an annular rubber ring or a polyurethane elastomer gasket, which works together with the steel wire rope vibration isolator.

[0039] During operation, the external vibrations acting on the mounting platform 2 are uniformly transmitted to the intermediate inertia member through the annular structure, and the force is uniformly distributed in the circumferential direction, thereby avoiding eccentric tilting or local stress concentration of the platform. The annular structure provides flexibility in the axial direction, achieving low stiffness vibration isolation, while absorbing energy through internal friction of the damping member material to suppress resonance amplitude and maintain the stability of the mounting platform.

[0040] Compared with point arrangement, the above-mentioned annular configuration is compact in structure and easy to install, can provide uniform circumferential support in limited space, and avoid asymmetric stress due to assembly angle deviation. Since it is an integral annular member, only the central axis needs to be aligned for positioning and fastening during assembly, which is highly repeatable and simplifies the maintenance and replacement process.

[0041] Please refer to Figures 2-3 In a possible implementation, a rotation-stopping mechanism 6 or a linear guide mechanism is provided between the secondary vibration isolation unit 33 and the mounting platform 2 to limit the rotational freedom of the mounting platform 2 around the vertical plane. The rotation-stopping mechanism 6 can adopt the form of key pin and key groove cooperation, and two symmetrical anti-rotation pins are arranged between the intermediate inertia member 32 and the mounting platform 2, which are inserted into the key groove on the mounting platform 2, so that the platform can freely displace in the axial direction, but the rotation around the normal direction is limited. The linear guide mechanism can adopt the form of parallel guide column and sliding sleeve cooperation, two or four guide columns are fixed on the intermediate inertia member 32, the guide column surface is hardened and chrome plated, and the mounting platform 2 is provided with a linear bearing or a bushing, the guide column passes through the bushing to keep the platform moving direction approximately linear, only having displacement freedom in the designed compliant direction.

[0042] Through the above-mentioned rotation-stopping or linear guide structure, the mounting platform 2 will not swing around the normal direction due to asymmetric load or cable tension during operation, thereby avoiding eccentric stress and local stress concentration of the compliant member and the damping member 5, and improving the long-term stability of the vibration isolation assembly 3. The linear guide mechanism can provide more accurate motion trajectory control while ensuring the anti-rotation function, and is especially suitable for installing large mass microphones on the platform or using in strong interference environment.

[0043] In practical applications, the rotation-stopping mechanism 6 is simple in structure, easy to install and low in cost, and is suitable for conventional desktop live broadcast use scenarios; the linear guide mechanism is suitable for high-precision or high-load scenarios, and can reduce the lateral displacement amount while maintaining the vibration isolation performance. Both solutions do not significantly increase the equivalent stiffness of the system, and can improve the anti-interference ability of the system without damaging the vibration isolation performance.

[0044] Referring to Figure 3 In a possible implementation, the directional compliant member 4 of the primary vibration isolation unit 31 and / or the secondary vibration isolation unit 33 adopts a steel wire rope isolator. The steel wire rope isolator is formed by winding a plurality of stainless steel wires and fixing the two ends in aluminum alloy or steel clamps, which are connected to the support base 1, the intermediate inertia member 32 or the mounting platform 2 by bolts. The steel wire rope isolator exhibits nonlinear compliance characteristics in tension, compression and bending-torsion directions, and the main compliance direction is arranged along the geometric axis across the steel wire rope, which is basically consistent with the normal direction of the support base 1, thereby providing lower stiffness in the target vibration isolation direction.

[0045] During operation, the steel wire rope isolator can dissipate energy through frictional slip and small elastic-plastic deformation between the wire strands, so it itself has both compliance and damping functions, reducing the need for additional damping members 5. In the low-frequency section, the compliance characteristics of the steel wire rope isolator ensure a low natural frequency; in the medium-high frequency section, the friction between the wire strands effectively suppresses the vibration amplitude, thereby improving the overall transmissibility curve.

[0046] Compared with traditional springs or rubber elements, the steel wire rope isolator performs better in temperature adaptability, fatigue resistance and environmental aging resistance, and is particularly suitable for long-term use in desktop live broadcast scenarios. Due to its compact structure, it can provide sufficient compliance in limited installation space and allow a certain angle of misalignment installation without significantly affecting the vibration isolation effect.

[0047] Referring to Figures 2-3 In a possible implementation, the cable exit position of the mounting platform 2 is provided with a cable decoupling structure 7, so that the cable forms at least one loose loop at the outlet, and the inner radius of the loose loop is 10-20 times the outer diameter of the cable. After the cable is led out through the cable exit hole on the mounting platform 2, it is wound into one or more loops and then fixed on the support base 1 or a separate cable support frame to form a compliant section. To ensure stable loop curvature, a low-friction guide ring or roller can be provided at the cable exit position to keep the cable uniformly curved without cornering during installation and use.

[0048] The slack loop can reduce the equivalent stiffness of the cable in the axial direction, avoiding it becoming a rigid transmission channel of vibration. When the cable is slightly pulled or adjusted in position, the slack loop releases stress through geometric bending deformation, thus not causing additional impact on the mounting platform 2 and the microphone. In this way, the value of kc can be controlled to be below 0.2 x k1, consistent with the design goal of the vibration isolation assembly 3.

[0049] The above installation method is simple, only needs to reserve sufficient length for the cable and fix the end points, does not significantly increase the cost, and does not affect the electrical performance of the cable. The radius of the slack loop is designed in proportion to the outer diameter of the cable, which can ensure the compliance and the minimum bending radius requirement at the same time, avoiding damage to the cable sheath or conductor.

[0050] In a possible implementation, the intermediate inertia member 32 and the adjacent vibration isolation unit are rigidly and detachably connected through at least three circumferentially spaced apart spacer columns cooperating with threaded fasteners. The spacer columns are uniformly distributed along the circumference, and the number can be three or four, and the circumferential angle interval of adjacent spacer columns is 120° or 90°, respectively. The spacer columns are made of high-strength steel or aluminum alloy, and the two ends are threaded, and are fastened with the intermediate inertia member 32 and the connecting plate of the vibration isolation unit through screws or bolts.

[0051] The specification of the threaded fastener can be M4-M6, and the tightening torque range is 3-6 N·m. During assembly, the spacer column is first fixed through the thread with the lower surface of the intermediate inertia member 32, and then cooperates with the connecting plate of the first-stage vibration isolation unit 31; the upper surface is connected with the second-stage vibration isolation unit 33 in the same way. In order to ensure the reliability during long-term use, the thread can be coated with a thread locking agent, and if necessary, a spring washer can be configured to prevent loosening.

[0052] The above structure can realize quick disassembly during installation and maintenance, and when it is necessary to replace the vibration isolation unit or adjust the mass of the intermediate inertia member 32, only the fasteners need to be loosened to complete the separation. At the same time, the rigid connection ensures that the intermediate inertia member 32 and the vibration isolation unit maintain a stable coaxial relationship during work, avoiding additional flexibility and uneven force transmission caused by loosening of the contact surface.

[0053] Please refer to Figures 1-3 In a possible implementation, a displacement limiting structure 8 is arranged between the second-stage vibration isolation unit 33 and the mounting platform 2, and the displacement limiting structure 8 includes a limiting stop ring and / or a buffer opposite the mounting platform 2. The limiting stop ring can be fixed to the upper part of the second-stage vibration isolation unit 33, and maintains a certain gap with the bottom surface of the mounting platform 2. When the mounting platform 2 is axially displaced beyond a predetermined value, it contacts the limiting stop ring, thereby limiting the relative displacement. The buffer can be made of rubber pad, polyurethane elastomer or microcellular foam material, and is arranged on the contact surface between the stop ring and the mounting platform 2. When contact occurs, it absorbs part of the energy by compression, reducing the impact.

[0054] In normal working state, the displacement amplitude of the mounting platform 2 is less than the limiting gap, and the limiting structure does not participate in force; when subjected to accidental impact or large displacement disturbance in the carrying process, the mounting platform 2 contacts the limiting ring and absorbs energy by the buffer, avoiding excessive deformation or damage of the flexible member. The limiting gap is preferably set to ±2 to ±4 mm, so as to effectively protect the vibration isolation unit without affecting the normal vibration isolation performance.

[0055] The above structure can improve the impact resistance and service life of the overall device, while ensuring that the vibration isolation performance in the normal working frequency band is not affected. The buffer material and hardness can be selected according to the actual working conditions, for example, polyurethane with a Shore hardness of 70A or above can be selected in a high-energy impact environment, and rubber with a Shore hardness of about 50A can be selected in a general use environment.

[0056] In a possible implementation, the angle between the main flexible direction of the primary vibration isolation unit 31 and the secondary vibration isolation unit 33 and the normal direction of the support base 1 is not greater than 20°. When assembling, the geometric axis of the flexible member is installed along the reference direction with the normal direction of the support base 1 as the reference axis, and the direction consistency is ensured through the positioning hole, positioning sleeve or special tool. After installation is completed, the angle between the main flexible direction of the flexible member and the normal direction of the support base 1 can be detected using an angle gauge or a three-coordinate measuring head, and the angle deviation is not more than 20°, which is considered to meet the requirements.

[0057] The arrangement can ensure that the vibration isolation unit deforms mainly in the normal direction during work, avoiding transverse coupling stiffness or additional load caused by assembly deviation. The flexible member provides low stiffness in the main flexible direction, achieving the expected natural frequency and vibration isolation performance; and maintains high stiffness in the non-main direction, thereby enhancing the lateral stability of the platform. By controlling the angle range, the vibration isolation effect can be ensured, and the stress uniformity and reliability of the vibration isolation assembly 3 can be improved.

[0058] In actual application, the alignment of the main flexible direction can be determined by the geometric characteristics of the flexible member itself, such as the center axis of the spiral spring, the spanning axis of the steel wire rope isolator or the normal direction of the thin plate spring. For different forms of flexible members, as long as the angle between the working direction and the normal direction of the support base 1 is controlled to be not greater than 20°, it belongs to the protection scope of the present application.

[0059] In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

[0061] In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0062] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A microphone vibration isolation mounting structure for desktop live streaming, comprising: The support base, the mounting platform for clamping the microphone, and the vibration isolation assembly arranged between the support base and the mounting platform; characterized in that: The vibration isolation assembly comprises a primary vibration isolation unit, an intermediate inertia element and a secondary vibration isolation unit connected in sequence, the primary vibration isolation unit is arranged between the support base and the intermediate inertia element, and the secondary vibration isolation unit is arranged between the intermediate inertia element and the mounting platform; The primary vibration isolation unit and the secondary vibration isolation unit are respectively configured as a parallel structure of a directional compliance element and a damping element, and are respectively arranged in parallel between the corresponding adjacent connecting components, wherein the equivalent stiffness of the secondary vibration isolation unit is 2-5 times the equivalent stiffness of the primary vibration isolation unit, and the natural frequency of the secondary vibration isolation unit is 1.8-2.5 times the natural frequency of the primary vibration isolation unit; The mounting platform is provided with a cable decoupling structure to form a cable compliance section at the installation position.

2. The vibration isolation mounting structure according to claim 1, characterized by The primary vibration isolation unit, the intermediate inertia element and the secondary vibration isolation unit are stacked along the same axis.

3. The isolation mounting structure according to claim 2, characterized by The intermediate inertia element is a coaxial annular counterweight element or a disc type counterweight element, and is connected with the primary vibration isolation unit and the secondary vibration isolation unit through detachable rigid connecting elements.

4. The isolation mounting structure according to claim 2, characterized by The directional compliance element and the damping element of the secondary vibration isolation unit are configured as an integral annular structure.

5. The isolation mounting structure according to claim 4, characterized by A rotation stopping mechanism or a linear guide mechanism is arranged between the secondary vibration isolation unit and the mounting platform to limit the rotation freedom of the mounting platform around the plane perpendicular to the mounting platform.

6. The isolation mounting structure according to claim 4, characterized by The directional compliance element of the primary vibration isolation unit and / or the secondary vibration isolation unit is a steel wire rope vibration isolator.

7. The isolation mounting structure according to claim 1, characterized by The cable decoupling structure is arranged at the cable exit position of the mounting platform to form at least one loose loop, and the inner radius of the loose loop is 10-20 times the outer diameter of the cable.

8. The isolation mounting structure according to claim 3, characterized by The intermediate inertia element and the adjacent vibration isolation unit are rigidly and detachably connected through at least three circumferentially spaced apart spacer columns and threaded fasteners.

9. The isolation mounting structure according to any one of claims 1 to 8, characterized by A displacement limiting structure is arranged between the secondary vibration isolation unit and the mounting platform, and the displacement limiting structure comprises a limiting stop ring and / or a buffer element opposite to the mounting platform.

10. The isolation mounting structure according to any one of claims 1 to 8, characterized by The included angle between the main compliance direction of the primary vibration isolation unit and the secondary vibration isolation unit and the normal direction of the support base is ≤20°.

Images