Quasi-zero stiffness shock absorber for camera

Abstract

The utility model discloses a quasi-zero stiffness shock absorber for a camera, and belongs to the field of shock absorption. The quasi-zero stiffness shock absorber comprises a mounting seat, at least one group of disc spring shock absorption units are arranged on the mounting seat, a bottom cylinder is arranged below the mounting seat, a spring fixing column is arranged below the bottom cylinder, a spring is arranged on the spring fixing column, each disc spring shock absorption unit comprises a disc spring, one side, close to the mounting seat, of the disc spring is the inner side, and the other side of the disc spring is the outer side. A rubber inner ring and a metal inner ring are sequentially arranged on the inner side, a rubber outer ring and a metal outer ring are sequentially arranged on the outer side, the rubber inner ring is in contact with the disc spring, and the metal inner ring is in contact with the mounting seat. The positive stiffness structure and the negative stiffness structure are connected in series, so that the system has high static stiffness, low dynamic stiffness, large bearing capacity and low inherent frequency, and the purpose of broadband vibration isolation of the system is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of vibration damping, and relates to a quasi-zero stiffness vibration damper for a camera. Background Art

[0002] In a camera system, mechanical vibration is a major factor affecting image quality. These vibrations can be caused by various sources, including the mechanical movement of the camera itself, vibrations in the external environment, and operations during the shooting process. Even minor vibrations are sufficient to cause image blurring or distortion, especially in long exposure or high magnification situations. To suppress camera vibrations, researchers usually use rubber pads to suppress vibrations.

[0003] Vibration control is mainly divided into three methods: active vibration isolation, semi-active vibration isolation, and passive vibration isolation. Due to factors such as complexity and cost, the most commonly used method currently is passive vibration isolation. According to the linear vibration isolation theory, the natural frequency of a single-degree-of-freedom linear system is wo = √K / M. When the excitation frequency is greater than √2, the system starts to isolate vibrations. The lower the natural frequency of the system, the larger the vibration isolation frequency band range and the better the effect. By reducing the stiffness of the system and increasing the mass of the object, the natural frequency of the system can be effectively reduced, and the vibration isolation frequency band width of the system can be expanded. However, reducing the stiffness of the system and increasing the mass will cause the static deformation of the support spring to become larger. Content of the Utility Model

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a quasi-zero stiffness vibration damper for a camera. By connecting a positive stiffness structure and a negative stiffness structure in series, the system has a high static stiffness and a low dynamic stiffness, has a large load-bearing capacity and a small natural frequency, and achieves the purpose of wide-band vibration isolation of the system.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a quasi-zero stiffness vibration damper for a camera, which includes a mounting seat. At least one set of disc spring vibration damping units is arranged on the mounting seat. A bottom cylinder is arranged below the mounting seat, and a spring fixing column is arranged below the bottom cylinder. A spring is arranged on the spring fixing column. The disc spring vibration damping unit includes a disc spring. The side of the disc spring close to the mounting seat is the inner side, and the other side is the outer side. A rubber inner ring and a metal inner ring are sequentially arranged on the inner side, and a rubber outer ring and a metal outer ring are sequentially arranged on the outer side. The rubber inner ring contacts the disc spring, and the metal inner ring contacts the mounting seat.

[0007] In an embodiment, the combination method of the disc springs in several disc spring vibration damping units is superposition series connection, opposed series connection, or compound series connection. When in superposition series connection, the number of disc springs is N; when in opposed series connection, the number of disc springs is 2N + 1; when in compound series connection, the number of disc springs is 3N.

[0008] In one embodiment, a housing is provided outside the mounting base. A plurality of first grooves opening outward are formed in the outer sidewall of the mounting base, and a plurality of second grooves opening inward are formed in the inner sidewall of the housing. The first grooves and the second grooves cooperate with each other to form a space, and the disc spring damping unit is disposed in the space.

[0009] In one embodiment, the housing is located outside the disc spring, and the metal outer ring contacts the housing.

[0010] In one embodiment, an end cover is provided above the housing. The top of the mounting base penetrates through the end cover, and a connecting plate is provided above the top of the mounting base, and the connecting plate is used for fixedly connecting the camera.

[0011] In one embodiment, the bottom of the housing is connected to the damping fixing frame.

[0012] In one embodiment, the upper end of the spring contacts the bottom surface of the bottom cylinder. The spring fixing column includes a column body and a limiting platform provided below the column body, and the lower end of the spring contacts the upper surface of the limiting platform.

[0013] In one embodiment, the bottom surface of the metal inner ring in the lowermost group of disc spring damping units contacts the bottom cylinder.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] The present utility model provides a quasi-zero stiffness shock absorber for a camera, and its structure includes a mounting base, a disc spring damping unit, a bottom cylinder, a spring fixing column and a spring. The disc spring damping unit is composed of a disc spring, a rubber inner ring, a metal inner ring, a rubber outer ring and a metal outer ring, and forms a negative stiffness structure through a specific combination method. This negative stiffness structure is connected in series with the positive stiffness structure of the spring, realizing the high static stiffness and low dynamic stiffness of the quasi-zero stiffness shock absorber system, thereby achieving the purpose of broadband vibration isolation. The quasi-zero stiffness shock absorber system exhibits excellent vibration isolation performance, can effectively respond to external excitation, has a wide vibration isolation frequency band and a significant amplitude attenuation rate. This superior performance significantly improves the vibration isolation effect of the system in the low-frequency range, ensuring its stable dynamic response in various environments. In addition, the system significantly expands the zero stiffness range of the vibration damping table and can be flexibly adjusted according to specific requirements to adapt to different working conditions. This characteristic enables the system to still maintain good performance stability and reliability in the face of an environment with large displacements. In the case of load changes, the system can adjust the number of disc springs and the stiffness of the spring to flexibly maintain zero stiffness at the static equilibrium position. This adjustability ensures the continuous stability of the system under different load conditions, further enhancing its adaptability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1Schematic diagram of the overall structure of a quasi-zero stiffness shock absorber.

[0017] Figure 2 Curve of the force-displacement characteristic of the disc spring varying with the height-thickness ratio.

[0018] Figure 3 Schematic diagram of the structure of the disc spring element.

[0019] Figure 4 Negative stiffness mechanism.

[0020] Figure 5 Load-displacement characteristic diagram of the quasi-zero stiffness shock absorber.

[0021] Figure 6 Stiffness-displacement characteristic diagram of the quasi-zero stiffness shock absorber.

[0022] Wherein: 1 - First bolt hole, 2 - Connection plate, 3 - Second bolt hole, 4 - Mounting seat, 5 - Bottom cylinder, 6 - Spring, 7 - Spring fixing column, 8 - End cover, 9 - Outer shell, 10 - Third bolt hole, 11 - Metal outer ring, 12 - Rubber outer ring, 13 - Disc spring, 14 - Rubber inner ring, 15 - Metal inner ring. Specific implementation manner

[0023] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings:

[0026] The utility model provides a quasi-zero stiffness shock absorber for a camera, which includes a mounting seat 4, and at least one set of disc spring shock absorption units are configured on the mounting seat 4. Below the mounting seat 4, there is a bottom cylinder 5, and below the bottom cylinder 5, there is a spring fixing column 7, and a spring 6 is installed on the spring fixing column 7. The disc spring shock absorption unit is mainly composed of a disc spring 13. One side of the disc spring 13 is defined as the inner side, close to the mounting seat 4, and the other side is the outer side. A rubber inner ring 14 and a metal inner ring 15 are sequentially arranged on the inner side, and are respectively in contact with the disc spring 13 and the mounting seat 4; a rubber outer ring 12 and a metal outer ring 11 are sequentially arranged on the outer side.

[0027] The combination of the disc spring 13 with the rubber inner ring 14 and the rubber outer ring 12 effectively avoids the direct contact between the disc spring 13 and the mounting seat 4, reduces the risk of wear and damage of the disc spring 13, and improves the service life. The elastic buffering effect of the rubber protects the disc spring 13, enabling it to work more stably. At the same time, this design also increases the overall durability of the shock absorber.

[0028] The disc springs 13 can be combined in ways such as stacked series, opposed series, composite series, etc., and can be flexibly adjusted, enabling the shock absorber to adapt to different vibration environments and load requirements.

[0029] The series design of the spring 6 and the disc spring 13 enables the shock absorber to have negative stiffness characteristics while ensuring the stability and load-bearing capacity of the overall structure. The positive stiffness of the spring 6 and the negative stiffness of the disc spring 13 cancel each other out, forming a quasi-zero stiffness characteristic near the equilibrium position, effectively reducing vibration transmission and improving the vibration isolation effect.

[0030] The outside of the mounting seat 4 is surrounded by a housing 9. A plurality of first grooves opening outward are provided on the outer side wall of the mounting seat 4, and a plurality of second grooves opening inward are provided on the inner side wall of the housing 9. The first grooves and the second grooves correspond to and cooperate with each other to form a space, and the disc spring shock absorption unit is arranged inside this space. In addition, the housing 9 is located outside the disc spring 13, and the metal outer ring 11 is in contact with the housing 9.

[0031] The upper end of the spring 6 is in contact with the bottom surface of the bottom cylinder 5. The spring fixing column 7 is composed of a column body and a limiting platform below the column body, and the lower end of the spring 6 is in contact with the upper surface of the limiting platform. In the lowermost set of disc spring shock absorption units, the bottom surface of the metal inner ring 15 is directly in contact with the bottom cylinder 5.

[0032] A end cap 8 is provided above the housing 9. The top of the mounting seat 4 passes through the end cap 8. Above the top of the mounting seat 4, a connecting plate 2 is provided, and this connecting plate 2 is used to fix the camera. The bottom of the housing 9 is connected to the shock absorption fixing frame.

[0033] In a specific embodiment, a quasi-zero stiffness shock absorber for a camera is provided. The quasi-zero stiffness shock absorber includes a housing 9, an end cap 8, a disc spring 13, a mounting seat 4, a rubber inner ring 14, a rubber outer ring 12, a metal inner ring 15, a metal outer ring 11, a connecting plate 2, a bottom cylinder 5, a spring 6, and a spring fixing column 7. The disc spring 13 is in direct contact with the mounting seat 4, which is likely to cause damage to the disc spring 13. In this embodiment, to avoid direct contact with the mounting seat 4, the disc spring 13 contacts the rubber first and then the metal, thereby avoiding damage to the disc spring 13.

[0034] The mounting seat 4 contacts the metal inner ring 15 through a first groove, and at the same time, the bottom cylinder 5 contacts the lower surface of the metal inner ring 15. The mounting seat 4 and the bottom cylinder 5 are connected by threads. The two ends of the above-mentioned spring 6 are respectively connected to the bottom cylinder 5 and the spring fixing column 7.

[0035] Stacked series connection, opposed series connection, and composite series connection can be carried out according to needs. The number of disc springs 13 is selected according to the type. When stacked in series, the number of disc springs 13 is N. When opposed in series, the number of disc springs 13 is 2N + 1. When in composite series, the number of disc springs 13 depends on 3N.

[0036] There are several circular mounting grooves in the mounting seat 4 inside the disc spring 13 and the housing 9, namely the first groove and the second groove, to facilitate the positioning of the metal inner ring 15 and the metal outer ring 11.

[0037] The bottom of the housing 9 is fixed to the shock absorption fixing frame through the third bolt hole 10. The top of the mounting seat 4 inside the disc spring 13 is first fixed to the connecting plate 2 through the second bolt hole 3, and the connecting plate 2 is fixed to the camera through the first bolt hole 1.

[0038] The assembly steps of the quasi-zero stiffness shock absorber include:

[0039] 1) Nest the disc spring 13 inside the rubber inner ring 14 and the rubber outer ring 12, and clamp the rubber inner ring 14 and the rubber outer ring 12 inside the metal inner ring 15 and the metal outer ring 11 to form a disc spring shock absorption unit.

[0040] 2) Install the spring fixing column 7 on the inner bottom surface of the housing 9 through threads.

[0041] 3) Install the disc spring shock absorption unit under the mounting seat 4. The mounting seat 4 is arranged inside the disc spring shock absorption unit. The disc spring shock absorption unit is arranged in the space of the first groove and the second groove, and the bottom cylinder 5 is installed in cooperation with the threaded hole on the mounting seat 4 through the bottom cylinder 5.

[0042] 4) Install the spring 6 on the spring fixing column 7. The bottom cylinder 5 is arranged above the spring 6, and the spring fixing column 7 passes through the bottom cylinder 5 until the metal outer ring 11 contacts the inner circular mounting groove (the second groove) of the housing 9.

[0043] 5) Install the end cover 8 and the outer shell 9 with bolts to connect the mounting seat 4 and the connecting plate 2.

[0044] 6) Connect the outer shell 9 to the vibration damping fixing bracket through the third bolt hole 10, and connect the camera to the first bolt hole 1 on the connecting plate 2 with bolts.

[0045] As Figure 1 and Figure 2 shown, this embodiment provides a quasi-zero stiffness shock absorber for a camera. The shock absorber mainly includes an outer shell 9, an end cover 8, a disc spring 13, a mounting seat 4, a rubber inner ring 14, a rubber outer ring 12, a metal inner ring 15, a metal outer ring 11, a connecting plate 2, a bottom cylinder 5, a spring 6, and a spring fixing column 7. To facilitate the connection of the shock absorber to the vibration damping fixing bracket, the bottom of the outer shell 9 is fixed to the vibration damping fixing bracket through the third bolt hole 10. To facilitate the connection of the shock absorber to the camera, the top of the mounting seat 4 is first fixed to the connecting plate 2 with bolts, and the connecting plate 2 is fixed to the camera through the first bolt hole 1. And to better meet the requirements of different displacement excitation ranges, multiple disc springs 13 can be installed in series on the outer wall of the mounting seat 4 and the circular mounting steps protruding on the inner wall of the outer shell 9, which are the steps between the upper and lower adjacent first grooves and the steps between the upper and lower adjacent second grooves.

[0046] The specific assembly steps of this quasi-zero stiffness shock absorber are as follows:

[0047] A. Install the disc spring shock absorption unit. The metal outer ring 11, the rubber outer ring 12, the disc spring 13, the rubber inner ring 14, and the metal inner ring 15 are connected by the high elasticity of the rubber.

[0048] B. Connect the spring fixing column 7 to the outer shell 9 by threading, and place the spring 6 on the spring fixing column 7.

[0049] C. According to the actual requirement for the number of disc springs, place the disc spring shock absorption unit into the cylinder of the mounting seat 4 in sequence, and install the bottom cylinder 5 under the mounting seat 4.

[0050] D. Install the mounting seat 4 with the bottom cylinder 5 and the disc spring shock absorption unit on the protruding step inside the outer shell 9, so that the metal outer ring 11 contacts the outer shell 9, and at the same time, connect the bottom cylinder 5 and the spring 6 to form an assembly.

[0051] E. Connect the camera through the first bolt hole 1 on the connecting plate 2, connect the second bolt hole 3 on the mounting seat 4 to the connecting plate 2, and connect the third bolt hole 10 on the outer shell 9 to the vibration damping fixing bracket to complete the assembly.

[0052] The working principle of the quasi-zero stiffness shock absorption device is introduced below:

[0053] The negative stiffness principle of the quasi-zero stiffness shock absorber using a disc spring group in series with a spring is as follows: The load characteristic of the disc spring group itself presents a non-linear characteristic. By selecting different height-to-thickness ratios (z = H0 / t), when the disc spring 13 is in a flattened state, the system is enabled to have a negative stiffness characteristic.

[0054] As Figure 2 shown, it is the curve of the force-displacement characteristic of the disc spring 13 varying with the height-to-thickness ratio. When the ratio of the height H0 of the slotted part to the thickness t of the disc spring 13 in the uncompressed state is close to 1.4, as the vertical displacement increases, the vertical load-displacement relationship curve will show a situation where the load remains unchanged for a certain period. Within this horizontal section range, the disc spring is compressed downward, but the load magnitude remains basically unchanged, and the stiffness of the device approaches zero, that is, the so-called quasi-zero stiffness characteristic. When the ratio of H0 to t is greater than the square root of 2, as the vertical displacement increases, the vertical load-displacement relationship curve will show a situation where the load first increases, then decreases, and then increases again.

[0055] Among the geometric parameters of the structure of the disc spring 13, E is the elastic modulus; μ is the Poisson's ratio; t is the thickness of the disc spring, D is the outer diameter of the disc spring, d is the inner diameter of the disc spring; h is the deformation amount when the disc spring is flattened; x is the deformation amount of a single disc spring; C = D / d is the calculation coefficient, and K1 is only related to the C coefficient. The force-displacement characteristic load formula of a single disc spring 13 can be obtained as

[0056] (1)

[0057] (2)

[0058] By taking the derivative of formula (1) with respect to x, the stiffness-displacement equation of the disc spring is obtained as

[0059] (3)

[0060] When the stiffness of the disc spring 13 is less than zero, the disc spring system is unstable. By adding a spring positive stiffness structure, the stiffness of the system is made greater than or equal to zero. The equation of the spring stiffness is

[0061] (4)

[0062] When this shock absorber is applied between the vibration damping fixing frame and the camera, the vertical force F is jointly provided by the disc spring 13 and the spring 6. The restoring force-displacement equation of the quasi-zero stiffness system can be obtained as

[0063] (5)

[0064] Taking the derivative of x in the above formula, the stiffness-displacement equation of the quasi-zero stiffness system can be obtained as

[0065] (6)

[0066] As can be seen from Equation (5), when x = h and the conical spring is flattened, the system is in the equilibrium position.

[0067] As Figure 1 、 3 、and as shown in 4, the 13 groups of disc springs in this embodiment are arranged in a butt - joint series. The disc springs 13 that are butted together respectively bear the pressure of the load. While keeping the bearing capacity unchanged, the deformation of the diaphragm disc spring increases by a multiple corresponding to the number of butt - joints. The relationships between the load and the deformation of the butt - joint combination are respectively

[0068] (7)

[0069] (8)

[0070] In the formula, F z is the bearing capacity of the disc spring group, x z is the deformation of the disc spring group, n is the number of butt - joints, F is the bearing capacity of a single disc spring, and x is the deformation of a single disc spring.

[0071] As Figure 5 and Figure 6 shown, when the vibration of the system is near the equilibrium position, the dynamic stiffness of the quasi - zero - stiffness shock absorber is close to zero. This shock absorber has the stiffness characteristic of high static and low dynamic, which can effectively reduce the vibration transmitted from the fixed frame to the camera and improve the accuracy of camera shooting.

[0072] A quasi - zero - stiffness shock absorber for a camera provided in this embodiment has the following advantages:

[0073] 1) The negative - stiffness structure of the quasi - zero - stiffness shock absorber is mainly composed of the butt - joint, superposition, and composite series of disc springs 13. It has no mechanical wear, does not require lubrication and maintenance, has a long service life, and has relatively small non - linear characteristics. The stiffness adjustment is convenient, and it can be well adapted to the positive - stiffness mechanism of spring 6.

[0074] 2) The disc - spring negative - stiffness structure of the quasi - zero - stiffness shock absorber is a passive component. Compared with the semi - active and active methods to achieve the quasi - zero - stiffness principle, it has the characteristics of easy assembly, small volume, and wide application scenarios.

[0075] 3) The quasi - zero - stiffness range of the quasi - zero - stiffness shock absorber is only related to the size of the disc spring 13, has stable performance, low production cost, and is easy to realize mass production.

[0076] 4) The quasi-zero stiffness shock absorber has the advantages of easy installation, simple structure, strong load-bearing capacity, compact structure, good economy, and strong adaptability. It uses a disc spring vibration isolation mechanism in series with a spring mechanism. The disc spring vibration isolation mechanism makes the stiffness of the quasi-zero stiffness vibration isolation device very low during small-amplitude vibration, having a good shock isolation effect; the spring mechanism can be designed with a larger stiffness to ensure that the overall structure has a good load-bearing capacity.

[0077] 5) The quasi-zero stiffness shock absorber exhibits excellent vibration isolation performance, can effectively respond to external excitation, has a wide vibration isolation frequency band and a significant amplitude attenuation rate. This superior performance significantly improves the vibration isolation effect of the quasi-zero stiffness shock absorber in the low-frequency range, ensuring its stable dynamic response in various environments.

[0078] 6) The quasi-zero stiffness shock absorber significantly expands the zero stiffness range of the vibration isolation table and can be flexibly adjusted according to specific requirements to adapt to different working conditions. This characteristic enables the quasi-zero stiffness shock absorber to still maintain good performance stability and reliability when facing an environment with a large range of displacements.

[0079] 7) Under the condition of load change, the quasi-zero stiffness shock absorber can flexibly maintain the zero stiffness at the static equilibrium position by adjusting the number of disc springs 13 and the stiffness of spring 6. This adjustability ensures the continuous stability of the quasi-zero stiffness shock absorber under different load conditions, further enhancing its adaptability and practicality.

[0080] The above content is only to illustrate the technical idea of the present utility model and cannot be used to limit the protection scope of the present utility model. Any modification made on the basis of the technical solution according to the technical idea proposed by the present utility model falls within the protection scope of the claims of the present utility model.

Claims

1. A quasi-zero stiffness shock absorber for a camera, characterized in that, It includes a mounting base (4), at least one set of disc spring damping units are arranged on the mounting base (4), a bottom cylinder (5) is arranged below the mounting base (4), a spring fixing column (7) is arranged below the bottom cylinder (5), a spring (6) is arranged on the spring fixing column (7), the disc spring damping unit includes a disc spring (13), the side of the disc spring (13) close to the mounting base (4) is the inner side, and the other side is the outer side. A rubber inner ring (14) and a metal inner ring (15) are sequentially arranged on the inner side, and a rubber outer ring (12) and a metal outer ring (11) are sequentially arranged on the outer side. The rubber inner ring (14) contacts the disc spring (13), and the metal inner ring (15) contacts the mounting base (4).

2. The quasi-zero stiffness shock absorber for a camera according to claim 1, characterized in that The combination mode of the disc springs (13) in several of the disc spring damping units is superposed series connection, opposed series connection, or composite series connection.

3. The quasi-zero stiffness shock absorber for a camera according to claim 2, wherein When in superposed series connection, the number of disc springs (13) is N; when in opposed series connection, the number of disc springs (13) is 2N + 1; when in composite series connection, the number of disc springs (13) is 3N.

4. The quasi-zero stiffness shock absorber for a camera according to claim 1, characterized in that, An outer shell (9) is arranged outside the mounting base (4). A plurality of first grooves with openings facing outwards are formed on the outer side wall of the mounting base (4), and a plurality of second grooves with openings facing inwards are formed on the inner side wall of the outer shell (9). The first grooves and the second grooves cooperate with each other to form a space, and the disc spring damping unit is arranged in the space.

5. The quasi-zero stiffness shock absorber for a camera according to claim 4, characterized in that, The outer shell (9) is located outside the disc spring (13), and the metal outer ring (11) contacts the outer shell (9).

6. The quasi-zero stiffness shock absorber for a camera according to claim 4, wherein, An end cover (8) is arranged above the outer shell (9).

7. The quasi-zero stiffness shock absorber for a camera according to claim 6, wherein, The top of the mounting base (4) penetrates through the end cover (8), and a connecting plate (2) is arranged above the top of the mounting base (4). The connecting plate (2) is used for fixedly connecting a camera.

8. The quasi-zero stiffness shock absorber for a camera according to claim 4, characterized in that The bottom of the outer shell (9) is connected to a damping fixing frame.

9. The quasi-zero stiffness shock absorber for a camera according to claim 1, characterized in that, The upper end of the spring (6) contacts the bottom surface of the bottom cylinder (5). The spring fixing column (7) includes a column body and a limiting platform arranged below the column body. The lower end of the spring (6) contacts the upper surface of the limiting platform.

10. The quasi-zero stiffness shock absorber for a camera according to claim 1, characterized in that, The bottom surface of the metal inner ring (15) in the lowermost set of the disc spring damping units contacts the bottom cylinder (5).

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