Variable damping seat mechanism

Abstract

The invention discloses a variable damping seat mechanism, and relates to the technical field of seat damping structures, the variable damping seat mechanism comprises a cushion framework, damping structures, a delivery pump and an elastic piece, each damping structure comprises a damping box, a communicating pipe and a piston assembly, one end of the damping box is rotationally installed at the second inner frame opening end of the cushion framework, a damping cavity is formed in the damping box and filled with damping liquid, the piston assembly comprises a piston block and a piston rod connected to the piston block, the piston block divides the damping cavity to form a rod cavity and a rodless cavity, and the rod cavity is connected with the piston rod. The two ends of the communicating pipe are communicated with the rod cavity and the rodless cavity respectively, a flow control device is arranged on the communicating pipe, and the elastic pieces and the damping structures are arranged in a one-to-one correspondence mode. The elastic piece and the damping structure not only provide flexible support, but also dissipate vibration energy through liquid flow, so that rigid impact of a traditional spring is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of seat shock-absorbing structures, and in particular to a variable damping seat mechanism. Background Art

[0002] With the continuous improvement of people's living standards and the continuous improvement of road traffic conditions, cars have become an indispensable means of transportation for many families. While enjoying the convenience and speed brought by cars, people have put forward higher requirements for the comfort of cars. Among them, the riding comfort of car seats is the focus of people's greatest concern. For this reason, seat shock absorbers are installed on car seats. Due to driving on different road surfaces, the shock absorber will have different damping feelings, that is, different shock absorption softness and hardness.

[0003] Most seats are equipped with springs as shock absorbers, and the most common ones are serpentine springs connected to curved hooks on the seat frame. Some seats are equipped with suspensions and damping systems on the suspensions to reduce the vibrations experienced by passengers on the seats. Although springs as shock absorbers can reduce the amplitude of vibrations experienced by passengers, the riding experience is extremely uncomfortable. Setting up a suspension and a damping system on the suspension requires a lot of space, resulting in a larger space required for installing the seat in the car, which limits the scope of application of the seat. Summary of the Invention

[0004] The main purpose of the present invention is to provide a variable damping seat mechanism, which aims to ensure the shock absorption performance of the seat while improving the comfort of the seat and reducing the size of the seat.

[0005] To achieve the above-mentioned object, the variable damping seat mechanism proposed in the present invention comprises:

[0006] The seat cushion frame is formed with a mounting opening having a first inner frame opening end and a second inner frame opening end opposite to each other;

[0007] A plurality of damping structures, each of the damping structures includes a damping box, a connecting pipe, and a piston assembly, one end of the damping box is rotatably mounted on the second inner frame end of the seat cushion frame, the damping box forms a damping chamber, the damping chamber is filled with damping fluid, the piston assembly includes a piston block and a piston rod connected to the piston block, the piston block and part of the piston rod are both sealed and slidably mounted in the damping chamber, the piston block separates the damping chamber to form a rod chamber and a rodless chamber, the two ends of the connecting pipe are respectively connected to the rod chamber and the rodless chamber, and a flow control device is provided on the connecting pipe;

[0008] a delivery pump, wherein the input port of the delivery pump is connected to the rod chamber of the damping chamber, and the output port of the delivery pump is connected to the rodless chamber of the damping chamber; and

[0009] A plurality of elastic members are arranged corresponding to each of the damping structures. One end of the elastic member is fixedly mounted on the first inner frame end of the seat cushion frame, and the other end is connected to the piston rod.

[0010] Preferably, the flow control device includes a solenoid valve.

[0011] Preferably, a flow detection device is further provided on the connecting pipe, and the flow detection device is electrically connected to the solenoid valve.

[0012] Preferably, the damping chamber is provided with an opening on a side close to the elastic member, a sealing seat is provided at the opening, a through hole is provided on the sealing seat, and the piston rod is at least partially sealed and movably installed in the through hole.

[0013] Preferably, a sealing sleeve is provided in the through hole, and the piston rod is at least partially movably and sealingly mounted in the sealing sleeve.

[0014] Preferably, a connecting piece is fixedly mounted on the seat cushion frame, and the connecting piece is detachably connected to an end of the elastic piece away from the damping structure.

[0015] Preferably, the input port of the delivery pump is connected to the rod chamber of the damping chamber through an input pipe; and / or,

[0016] The output port of the delivery pump is connected to the rodless chamber of the damping chamber through an output pipe.

[0017] Preferably, a detection device is installed in the damping chamber, and the detection device is electrically connected to the delivery pump.

[0018] Preferably, the detection device comprises at least a pressure sensor, and the pressure sensor is installed in the rod chamber or the rodless chamber of the damping chamber.

[0019] Preferably, the elastic member comprises a plurality of stacked spring leaves, the width of the middle portion of the spring leaf is greater than that of both ends, and the width decreases gradually from the middle portion to both ends.

[0020] In the technical solution provided by the present invention, each of the damping structures includes a damping box, a connecting pipe and a piston assembly, one end of the damping box is rotatably mounted on the second inner frame end of the seat cushion frame, the damping box is formed with a damping chamber, the damping chamber is filled with damping fluid, the piston assembly includes a piston block and a piston rod connected to the piston block, the piston block and part of the piston rod are sealed and slidably mounted in the damping chamber, the piston block separates the damping chamber to form a rod chamber and a rodless chamber, the two ends of the connecting pipe are respectively connected to the The rod chamber and the rodless chamber are connected by a flow control device on the connecting pipe. The input port of the delivery pump is connected to the rod chamber of the damping chamber, and the output port of the delivery pump is connected to the rodless chamber of the damping chamber. The multiple elastic members are arranged in a one-to-one correspondence with each of the damping structures. One end of the elastic member is fixedly mounted on the first inner frame end of the seat cushion frame, and the other end is connected to the piston rod. The synergistic effect of the elastic member and the damping structure not only provides flexible support, but also dissipates vibration energy through liquid flow, avoiding the rigid impact of traditional springs. The continuous circulation action of the delivery pump can compensate for liquid loss during long-term use, ensuring stable damping performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 A three-dimensional schematic diagram of an embodiment of a variable damping seat mechanism provided by the present invention;

[0023] Figure 2 for Figure 1 Schematic cross-sectional view of the medium damping structure.

[0024] Description of Figure Numbers:

[0025] 1. Seat cushion frame; 2. Damping structure; 21. Damping box; 22. Connecting pipe; 23. Piston assembly; 231. Piston block; 232. Piston rod; 233. Sealing seat; 3. Elastic part; 4. Delivery pump; 5. Solenoid valve; 6. Flow detection device.

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The present invention provides a variable damping seat mechanism. Figures 1 to 2 This is an embodiment of the variable damping seat mechanism provided by the present invention.

[0031] Automotive seat shock absorbers typically utilize springs or suspension damping systems. While spring structures can reduce vibration amplitude, they can result in a stiff and uncomfortable ride. While suspension damping systems can adjust the damping effect, they require a large installation space, limiting their use in compact vehicles. For example, on bumpy roads, traditional seats are unable to adjust their damping characteristics based on real-time vibrations, leading to fatigue after extended rides.

[0032] Please also refer to Figures 1 to 2The variable damping seat mechanism includes a seat cushion frame 1, a damping structure 2, a delivery pump 4 and an elastic member 3, wherein the seat cushion frame 1 is formed with a mounting opening having a first inner frame opening end and a second inner frame opening end opposite to each other, and each of the damping structures 2 includes a damping box 21, a connecting pipe 22 and a piston assembly 23, one end of the damping box 21 is rotatably mounted on the second inner frame opening end of the seat cushion frame 1, the damping box 21 is formed with a damping chamber, the damping chamber is filled with damping fluid, the piston assembly 23 includes a piston block 231 and a connecting pipe 22 connected to the piston block 2 31, the piston rod 232, the piston block 231 and part of the piston rod 232 are sealed and slidably installed in the damping chamber, the piston block 231 separates the damping chamber to form a rod chamber and a rodless chamber, the two ends of the connecting pipe 22 are respectively connected to the rod chamber and the rodless chamber, and a flow control device is provided on the connecting pipe 22. The multiple elastic members 3 are arranged in a one-to-one correspondence with each of the damping structures 2, one end of the elastic member 3 is fixedly installed on the first inner frame end of the seat cushion frame 1, and the other end is connected to the piston rod 232.

[0033] The damping box 21 refers to a closed container that holds the damping fluid and provides space for the piston to move. Specifically, it can be made of metal or high-strength plastic. Its rotating installation design allows the damping structure 2 to adjust its angle as the seat frame 1 deforms, avoiding stress concentration caused by rigid connection. The connecting pipe 22 refers to a fluid channel connecting the two chambers. Specifically, a flexible rubber tube or a metal bellows can be used. The damping force is changed by adjusting the flow of liquid in the tube. The flow control device refers to a component that controls the on-off or flow of the connecting pipe 22, such as the solenoid valve 5, which adjusts the opening by an electrical signal to achieve rapid switching of the damping characteristics. The elastic member 3 refers to a flexible element that provides a reset force, such as a laminated spring. The design of its width decreasing from the middle to the two ends can disperse stress and improve fatigue life.

[0034] When a passenger applies a load, causing the seat cushion frame 1 to deform, the second inner frame end pushes the damping box 21 to deflect about the pivot point. The piston rod 232, pulled by the elastic member 3, drives the piston block 231 to slide within the damping chamber. This piston movement forces the damping fluid to flow between the two chambers through the connecting tube 22. The flow control device adjusts the fluid flow rate based on real-time demand, thereby varying the damping force. After the load is removed, the elastic restoring force of the elastic member 3 pulls the piston rod 232 back to its original position. The stacked spring's wide center and narrow ends evenly distribute stress and prevent localized deformation.

[0035] The damping structure constitutes the basic component of the damper. The ordinary damper has limited shock absorption effect. Dampers such as magnetorheological damping, valve-controlled rheological damping or other types of piston rheological damping can be used to improve the shock absorption effect of the beryllium copper damper. For example, magnetorheological damping, a typical magnetorheological damping structure consists of a cylinder, a piston, a piston rod, magnetorheological fluid, a magnetic circuit and an accumulator (compensator). The magnetorheological fluid is filled in the cylinder, the piston rod connects the piston to the external structure, and an electromagnetic coil is wound inside or around the piston. The magnetic circuit consists of a piston (usually a magnetic conductive material), a coil, a cylinder (or part of a magnetic conductive material). ) and other components are used to generate a strong magnetic field in a specific area of ​​the piston (the damping channel). The accumulator compensates for the volume change caused by the piston rod entering and exiting the cylinder, as well as the thermal expansion and contraction of the fluid. When the piston moves relative to the cylinder, it forces the magnetorheological fluid (MR) fluid to flow through the damping channel on the piston. The MR fluid is in a free-flowing state, and the damping force is relatively small, primarily due to the viscosity of the fluid. The coil generates an electric current, which creates a strong magnetic field in the damping channel area. The particles in the MR fluid instantly form a chain-like structure, greatly increasing the resistance to fluid flow through the damping channel. This results in a significant increase in the damping force (primarily Coulomb damping). By varying the current input to the coil, the magnetic field strength can be precisely, continuously, and rapidly adjusted, thereby achieving real-time, active control of the damping force.

[0036] There are at least three groups of structures composed of damping structures and elastic parts, which are arranged in sequence from the left side to the right side of the seat. The width of the structure arranged in the middle position is smaller than that of the left and right sides. The structures on the left and right sides are symmetrically arranged and have the same size, so that passengers can sit on the seat more comfortably.

[0037] Therefore, in the technical solution provided by the present invention, each of the damping structures 2 includes a damping box 21, a connecting pipe 22 and a piston assembly 23. One end of the damping box 21 is rotatably mounted on the second inner frame end of the seat cushion frame 1. The damping box 21 forms a damping chamber, and the damping chamber is filled with damping fluid. The piston assembly 23 includes a piston block 231 and a piston rod 232 connected to the piston block 231. The piston block 231 and part of the piston rod 232 are both sealed and slidably mounted in the damping chamber. The piston block 231 The damping chamber is separated to form a rod chamber and a rodless chamber. The two ends of the connecting pipe 22 are respectively connected to the rod chamber and the rodless chamber. A flow control device is provided on the connecting pipe 22. The multiple elastic members 3 are arranged in a one-to-one correspondence with each of the damping structures 2. One end of the elastic member 3 is fixedly installed on the first inner frame end of the seat cushion frame 1, and the other end is connected to the piston rod 232. The synergistic effect of the elastic member 3 and the damping structure 2 not only provides flexible support, but also dissipates vibration energy through liquid flow, thereby avoiding the rigid impact of traditional springs.

[0038] Conventional seat shock absorbers usually use fixed throttle holes or manually adjustable valves, and are unable to automatically adjust the damping characteristics according to actual working conditions. Specifically, in an embodiment of the present invention, the flow control device includes a solenoid valve 5 .

[0039] The two ends of connecting tube 22 connect to the rod chamber and the rodless chamber, respectively. Solenoid valve 5 is mounted on connecting tube 22 and adjusts the valve core position by receiving an external control signal, thereby changing the cross-sectional area through which the damping fluid flows within connecting tube 22. When the seat is subjected to vibration, piston assembly 23 slides within the damping chamber, forcing the damping fluid to flow through connecting tube 22. Solenoid valve 5 dynamically adjusts the flow rate based on preset conditions or real-time monitoring data, thereby changing the resistance characteristics of damping structure 2. For example, on bumpy roads, solenoid valve 5 can increase the cross-sectional area to reduce the damping force, while reducing the cross-sectional area to improve support during smooth driving. The automatic control function of solenoid valve 5 ensures that the seat provides appropriate shock absorption under different road conditions, while simplifying the structural layout of the damping system and reducing the required installation space.

[0040] Furthermore, a flow detection device 6 is provided on the connecting pipe 22 , and the flow detection device 6 is electrically connected to the solenoid valve 5 .

[0041] When the seat is subjected to external vibration, the damping fluid flows between the rod chamber and the rodless chamber of the connecting tube 22. The flow detection device 6 collects the flow parameters of the damping fluid in the connecting tube 22 in real time, and converts the parameters into electrical signals and transmits them to the solenoid valve 5. The solenoid valve 5 dynamically adjusts the valve core opening according to the received signal, changes the flow area of ​​the connecting tube 22, and thus controls the flow of the damping fluid. For example, when it is detected that the flow exceeds the preset threshold, the solenoid valve 5 reduces the opening to increase the damping force; when the flow is lower than the threshold, the solenoid valve 5 increases the opening to reduce the damping force. The precise monitoring and automatic adjustment of the damping fluid flow during the seat shock absorption process improves ride comfort while ensuring the shock absorption effect.

[0042] While reducing the space occupied by the equipment, it is necessary to facilitate maintenance personnel to carry out maintenance work. Specifically, the damping chamber is provided with an opening on the side close to the elastic member 3, and a sealing seat 233 is provided at the opening. A through hole is opened on the sealing seat 233, and the piston rod 232 is at least partially sealed and movably installed in the through hole.

[0043] The opening of the damping chamber near the elastic member 3 is sealed by a sealing seat 233. The piston rod 232 passes through the through hole in the sealing seat 233 and is connected to the elastic member 3. When the elastic member 3 is subjected to an external force, the piston rod 232 moves axially along the through hole, driving the piston block 231 to slide within the damping chamber. At this time, the sealing structure within the through hole prevents leakage of the damping fluid. Because the sealing seat 233 is fixedly connected to the opening of the damping box 21 and a dynamic seal is formed between the inner wall of the through hole and the piston rod 232, the freedom of movement of the piston rod 232 is guaranteed while maintaining the airtightness of the damping chamber. For example, the sealing seat 233 can be fixed to the opening of the damping box 21 via a flange structure. A sealing gasket is provided between the flange and the damping box 21 to enhance the sealing effect. At the same time, a sealing gasket is also provided between the sealing seat 233 and the damping box 21 to prevent leakage of the damping fluid. The sealing seat 233 can also be detachably mounted on the damping box 21, making it convenient to subsequently open the damping box 21 to replenish the damping fluid or perform maintenance work.

[0044] Furthermore, a sealing sleeve is provided in the through hole, and the piston rod 232 is at least partially movably installed in the sealing sleeve in a sealing manner.

[0045] A sealing sleeve is secured within the through-hole. Its inner diameter is slightly smaller than the outer diameter of piston rod 232, creating an interference fit. Piston rod 232 passes through the sealing sleeve and connects to piston block 231 within the damping chamber. When piston rod 232 moves axially due to external vibration, the sealing sleeve elastically deforms to compensate for this displacement while maintaining the airtightness of the damping chamber. The sealing sleeve's multi-layered sealing structure disperses frictional stress and reduces wear caused by long-term use.

[0046] In the technical solution of the present invention, the input port of the delivery pump 4 is connected to the rod chamber of the damping chamber, and the output port of the delivery pump 4 is connected to the rodless chamber of the damping chamber.

[0047] The delivery pump 4 refers to a power device that drives the liquid to circulate between the two chambers, such as a micro gear pump, which is used to maintain the pressure balance in the damping chamber and compensate for liquid leakage. The delivery pump 4 continuously delivers liquid from the rod chamber to the rodless chamber to offset the volume difference caused by the displacement of the piston rod 232 and ensure the stability of the pressure in the damping chamber.

[0048] The input port of the delivery pump 4 is connected to the rod chamber of the damping chamber through an input pipe.

[0049] The output port of the delivery pump 4 is connected to the rodless chamber of the damping chamber through an output pipe.

[0050] When transfer pump 4 is activated, the inlet pipe draws the damping fluid from the rod chamber into the pump body, where it is pressurized and then injected into the rodless chamber through the outlet pipe. During this process, the inlet and outlet pipes each form a unidirectional flow path, ensuring that the damping fluid circulates in the desired direction under the drive of transfer pump 4. Because the inlet and outlet pipes are independently connected to their respective chambers, the isolated fluid transfer path prevents backflow caused by pressure fluctuations. The sealed connection between the pipes and the chambers maintains system pressure stability.

[0051] A detection device is installed in the damping chamber, and the detection device is electrically connected to the delivery pump 4 .

[0052] A pressure sensor is embedded in the damping chamber wall or piston assembly 23. When the seat is subjected to external vibrations, causing the damping fluid to flow between the chambers, the pressure sensor continuously collects data on pressure fluctuations within the chamber. The collected pressure signal is transmitted via wires to the control unit of the delivery pump 4. The control unit calculates the required fluid delivery volume based on a preset algorithm and then drives the delivery pump 4 to adjust the fluid flow rate at the inlet and outlet. For example, when the vehicle traverses a bumpy road, the pressure sensor detects a sudden increase in pressure in the rod chamber. The control unit immediately increases the speed of the delivery pump 4 to accelerate fluid circulation, thereby enhancing the damping effect.

[0053] Furthermore, the detection device includes at least a pressure sensor, and the pressure sensor is installed in the rod chamber or the rodless chamber of the damping chamber.

[0054] When the seat is subjected to external vibration, piston rod 232 drives piston block 231 to slide within the damping chamber, causing dynamic changes in the fluid pressure in the rod and rodless chambers. A pressure sensor collects real-time pressure data from the corresponding chamber and transmits it to the control system of delivery pump 4. The control system adjusts the flow rate output of delivery pump 4 based on the magnitude of the pressure change, thereby varying the flow rate of the damping fluid and dynamically adjusting the damping force. For example, if the pressure sensor detects a sudden increase in pressure in the rodless chamber, delivery pump 4 can increase its output flow rate to accelerate fluid return, reduce chamber pressure, and mitigate vibration impact.

[0055] The serpentine springs or cylindrical coil springs used in traditional seat shock absorbers require a larger installation space under the same load, and the stress distribution is concentrated at the bends, which can easily lead to fatigue fracture. Multi-level elastic support is achieved within the same projected area through plane superposition. The decreasing width design further optimizes the stress distribution state and achieves a more uniform elastic response in a compact space. Specifically, the elastic part 3 includes a plurality of stacked spring leaves, the middle width of the spring leaf is greater than the width at both ends, and the width decreases from the middle to the two ends.

[0056] The stacked springs' wider central region bears the primary support load, while the narrower regions at the ends produce a progressive elastic response as they deform. When the seat is subjected to external vibration, the multiple springs deform in unison. The central wide region provides basic support stiffness, while the narrower regions at the ends form a flexible transition through gradually decreasing width, resulting in a smoother overall deformation of the elastic element 3. This progressively decreasing width creates a gradient stress field along the length of the springs as they bend, effectively dispersing localized stress peaks and preventing premature plastic deformation at a single location.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A variable damping seat mechanism, characterized in that: include: The seat cushion frame is formed with a mounting opening having a first inner frame opening end and a second inner frame opening end opposite to each other; A plurality of damping structures, each of the damping structures includes a damping box, a connecting pipe and a piston assembly, one end of the damping box is rotatably mounted on the second inner frame end of the seat cushion frame, the damping box forms a damping chamber, the damping chamber is filled with damping fluid, the piston assembly includes a piston block and a piston rod connected to the piston block, the piston block and part of the piston rod are sealed and slidably mounted in the damping chamber, the piston block separates the damping chamber to form a rod chamber and a rodless chamber, the two ends of the connecting pipe are respectively connected to the rod chamber and the rodless chamber, and a flow control device is provided on the connecting pipe; and, A plurality of elastic members are arranged corresponding to each of the damping structures. One end of the elastic member is fixedly mounted on the first inner frame end of the seat cushion frame, and the other end is connected to the piston rod.

2. The variable damping seat mechanism according to claim 1, wherein: The flow control device includes a solenoid valve.

3. The variable damping seat mechanism according to claim 2, wherein: A flow detection device is also provided on the connecting pipe, and the flow detection device is electrically connected to the solenoid valve.

4. The variable damping seat mechanism according to claim 1, wherein: The damping chamber is provided with an opening on one side close to the elastic member, a sealing seat is provided at the opening, a through hole is opened on the sealing seat, and the piston rod is at least partially sealed and movably installed in the through hole.

5. The variable damping seat mechanism according to claim 4, wherein: A sealing sleeve is provided in the through hole, and the piston rod is at least partially movably and sealingly mounted in the sealing sleeve.

6. The variable damping seat mechanism according to claim 1, wherein: The damping structure further includes a delivery pump, wherein an input port of the delivery pump is connected to the rod chamber of the damping chamber, and an output port of the delivery pump is connected to the rodless chamber of the damping chamber.

7. The variable damping seat mechanism according to claim 6, wherein: The input port of the delivery pump is connected to the rod chamber of the damping chamber through an input pipe; and / or, The output port of the delivery pump is connected to the rodless chamber of the damping chamber through an output pipe.

8. The variable damping seat mechanism according to claim 1, wherein: A detection device is installed in the damping chamber, and the detection device is electrically connected to the delivery pump.

9. The variable damping seat mechanism according to claim 8, wherein: The detection device at least includes a pressure sensor, and the pressure sensor is installed in the rod chamber or the rodless chamber of the damping chamber.

10. The variable damping seat mechanism according to claim 1, wherein: The elastic member includes a plurality of stacked spring sheets, the width of the middle portion of the spring sheet is greater than the width of the two ends, and the width decreases from the middle portion to the two ends.

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