Simple and convenient seat chassis device

Abstract

The utility model relates to a simple seat chassis device. The simple and convenient seat chassis device comprises a shell, a sliding assembly, a leisure assembly and a limiting adjusting assembly. The sliding assembly, the swinging assembly and the limiting adjusting assembly are installed on the shell. The sliding assembly comprises a sliding cover, a sliding rack, a transverse moving locking block, a locking block limiting sleeve, a handle shifting rod and an elastic piece. Compared with the prior art, the simple and convenient seat chassis device has a labor-saving effect, and the structure of the simple and convenient seat chassis device is well simplified compared with the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of seat chassis, and in particular to a simple seat chassis device. Background Art

[0002] The seat chassis, also often referred to as the seat mechanism or base, is an important component of the seat structure. It is located at the bottom of the seat and plays the role of supporting and connecting the various parts of the seat (such as the seat cushion, seat back, armrests, etc.), and usually includes the adjustment mechanism of the seat. Specifically, the main functions and features of the seat chassis include:

[0003] 1) Support frame: As the basic frame of the seat, it needs to be strong enough to bear the weight of the occupant and maintain the stability and durability of the seat structure.

[0004] 2) Adjustment function: Modern seat chassis usually integrate height adjustment, tilt angle adjustment (front and back tilt or backrest tilt), sliding function, etc., so that users can adjust to the most comfortable position according to personal needs. These adjustment functions are often achieved through built-in mechanical devices or electric motors.

[0005] 3) Elastic support: Some seat chassis are also designed with elastic parts, gas pressure rods or other elastic elements to provide cushioning effect of the seat cushion and increase riding comfort.

[0006] 4) Rotation mechanism: Seats such as office chairs often have a rotation function, which is also achieved through bearings or rotation mechanisms in the chassis.

[0007] 5) Connection to the ground: The bottom of the chassis is usually connected to rolling wheels, five-star feet, four-star feet, discs or other forms of bases to support the seat and allow it to move or be fixed on the ground.

[0008] 6) Safety considerations: In seats for some specific applications, the chassis must also consider collision safety to ensure that the user's safety can be effectively protected in an emergency.

[0009] The seat chassis is not just a simple supporting structure. It realizes multiple dynamic functions of the seat through complex mechanical design and is a key factor in determining the comfort, stability and adaptability of the seat.

[0010] With the development of seat technology, various chassis structures emerge in an endless stream, and the innovation of technology and the improvement of structure make the structure of seat chassis complex, and the richness of adjustment handles is accompanied by the complexity of transmission structure. In terms of labor saving and simple operation, the existing implementation is not good enough. Utility Model Content

[0011] Based on this, the purpose of the present application is to provide a simple seat chassis device, which has the advantages of convenient operation and simple structure.

[0012] In one aspect of the present application, a simple seat chassis device is provided, comprising a housing, a sliding assembly, a swing assembly, and a limit adjustment assembly;

[0013] The sliding assembly, the remote assembly, and the limit adjustment assembly are respectively mounted on the housing;

[0014] The sliding assembly includes a sliding cover, a sliding rack, a transverse locking block, a locking block limiting sleeve, a handle lever, and an elastic member;

[0015] The sliding cover is slidably connected to the shell, and the sliding rack is fixedly arranged along the length direction of the shell and movably penetrates the shell;

[0016] The transverse locking block is formed with a locking tooth, which is movably matched with the sliding rack;

[0017] The locking block limiting sleeve is installed in the housing, and the locking block limiting sleeve forms a limiting groove;

[0018] The transverse locking block is movably sleeved in the limiting groove of the locking block limiting sleeve, and the elastic member is installed between one end of the transverse locking block and the end surface of the limiting groove;

[0019] The handle lever is rotatably connected to the outside of the housing;

[0020] The handle lever is in contact with the other end of the transverse locking block.

[0021] The simple seat chassis device described in the present application has a labor-saving effect compared with the prior art, and its structure is well simplified compared with the prior art.

[0022] First, the simple seat chassis device of the present application and the relaxing assembly are more labor-saving than the prior art, and are more labor-saving when lying down and more labor-saving when rebounding and sitting upright. Under such a structure, relaxing is easier.

[0023] Secondly, the simple seat chassis device of the present application can realize the lateral sliding of the seat cushion through the sliding assembly. When the seat cushion slides laterally, there are mainly two structures involved, one is the sliding rack and the other is the transverse locking block. When the handle lever is turned, the transverse locking block will be pushed laterally and produce a lateral movement relative to the locking block limit sleeve, which changes the relative position of the sliding rack and the transverse locking block, thereby allowing the sliding rack to pass smoothly relative to the transverse locking block, thereby allowing the sliding cover to slide laterally relative to the shell. When the handle lever is released, under the push of the elastic member, the sliding rack meshes with the locking teeth of the transverse locking block, thereby making the sliding rack unable to move relative to the shell, thereby achieving relative fixation of the sliding cover and the shell.

[0024] Thirdly, the limit adjustment component can realize both the pressing operation of the cylinder and the limit of the free movement. One set of structure realizes multiple functions, thus simplifying the overall structure.

[0025] In some further technical solutions, a concave position and the locking teeth are respectively formed in the middle of the transverse locking block.

[0026] The recess is adjacent to the locking tooth, and the recess is used for the sliding rack to slide smoothly, and the locking tooth is used for meshing with the sliding rack and locking the sliding rack.

[0027] In some further technical solutions, the handle lever is in an "L" shape, and a straight section thereof is rotatably connected to the housing via a rotation limit block;

[0028] The end of the straight section of the handle lever abuts against the other end of the transverse locking block.

[0029] In some further technical solutions, the elastic member is a spring.

[0030] A circular hole is formed at one end of the transverse locking block, and one end of the spring is sleeved in the circular hole.

[0031] In some further technical solutions, the housing includes an upper cover and a lower cover;

[0032] The Xiaoyao components are connected to the upper cover and the lower cover respectively.

[0033] In some further technical solutions, the limit adjustment assembly includes a movable handle, an adjustment pressure block, a mounting block, a torsion spring, and a latch;

[0034] The movable turning handle is movably connected to the lower cover;

[0035] The regulating pressing block is fixedly sleeved on the movable rotating handle and is placed above the cylinder mounting hole of the lower cover;

[0036] The mounting block is fixedly sleeved on the movable rotating handle;

[0037] One end of the torsion spring is fixedly mounted on the mounting block, and the other end of the torsion spring is connected to the latch;

[0038] The latch is movably connected to the alignment hole of the Xiaoyao component.

[0039] In some further technical solutions, the limit adjustment assembly further includes a clamp and a column with a "C"-shaped cross section;

[0040] The latch moves transversely and penetrates the column;

[0041] The clamp is sleeved on the latch and is located in the column. The clamp is used to limit the travel range of the latch.

[0042] In some further technical solutions, the travel limit plate of the Xiaoyao assembly is fixed to the inner wall of the upper cover and is arranged vertically;

[0043] A plurality of alignment holes are formed on the travel limit plate; and the travel limit plate is placed on one side of the column.

[0044] In some further technical solutions, the middle portion of the movable handle is bent and inclined relative to both ends thereof, and a sheet-shaped gripping portion is formed at the end of the movable handle.

[0045] In some further technical solutions, the sliding cover is used to connect to the seat cushion;

[0046] The lower cover is used to connect and install the cylinder;

[0047] The rocker assembly is used for the seat cushion to rock relative to the cylinder.

[0048] For better understanding and implementation, the present application is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a schematic diagram of the three-dimensional structure of a simple seat chassis device exemplified in the present application;

[0050] Figure 2 This is a schematic diagram of a three-dimensional structure of an exemplary sliding assembly of the present application;

[0051] Figure 3 A schematic diagram of the assembly relationship of an exemplary sliding cover, a sliding rack, and a transverse locking block;

[0052] Figure 4 A schematic diagram of the three-dimensional structure of an exemplary transverse locking block of the application;

[0053] Figure 5 A schematic diagram of the assembly relationship between the limit adjustment component and the lower cover of the application;

[0054] Figure 6 A schematic diagram of the assembly relationship between the limit adjustment component and the travel limit plate of the application;

[0055] Figure 7 A schematic diagram of the assembly relationship of an exemplary torsion spring, a latch, a clamp, and a column;

[0056] Figure 8 A front view of a simple seat chassis device exemplified in the present application;

[0057] Fig. 9 It is a three-dimensional structural schematic diagram of a partial structure of a simple seat chassis device exemplified in the present application. DETAILED DESCRIPTION

[0058] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0059] See also Figure 1-Figure 9 , an exemplary simple seat chassis device of the present application includes a housing 20, a sliding assembly 10, a free-range assembly, and a limit adjustment assembly 30;

[0060] The sliding assembly 10, the free-range assembly, and the limit adjustment assembly 30 are respectively mounted on the housing 20;

[0061] The sliding assembly 10 includes a sliding cover 11, a sliding rack 12, a transverse locking block 14, a locking block limiting sleeve 13, a handle lever 15, and an elastic member;

[0062] The sliding cover 11 is slidably connected to the housing 20, and the sliding rack 12 is fixedly arranged along the length direction of the housing 20 and movably penetrates the housing 20;

[0063] The transverse locking block 14 is formed with a locking tooth A1, which is movably matched with the sliding rack 12;

[0064] The locking block limiting sleeve 13 is installed in the housing 20, and the locking block limiting sleeve 13 forms a limiting groove;

[0065] The transverse locking block 14 is movably sleeved in the limiting groove of the locking block limiting sleeve 13, and the elastic member is installed between one end of the transverse locking block 14 and the end surface of the limiting groove;

[0066] The handle lever 15 is rotatably connected to the outside of the housing 20;

[0067] The handle lever 15 abuts against the other end of the transverse locking block 14 .

[0068] In some preferred embodiments, the middle of the transverse locking block 14 is respectively formed with a recess A2 and the locking tooth A1.

[0069] The concave position A2 is adjacent to the locking tooth A1 , and the concave position A2 is used for the sliding rack 12 to slide smoothly, and the locking tooth A1 is used for meshing with the sliding rack 12 and locking the sliding rack 12 .

[0070] In some preferred embodiments, the handle lever 15 is in an "L" shape, and a straight section thereof is rotatably connected to the housing 20 via a rotation limit block 16;

[0071] The end of the straight section of the handle lever 15 abuts against the other end of the transverse locking block 14 .

[0072] In some preferred embodiments, the elastic member is a spring.

[0073] A circular hole is formed at one end of the transverse locking block 14, and one end of the spring is sleeved in the circular hole.

[0074] In some preferred embodiments, the housing 20 includes an upper cover and a lower cover 21;

[0075] The Xiaoyao component is connected to the upper cover and the lower cover 21 respectively.

[0076] In some preferred embodiments, the sliding cover 11 is provided with a plurality of limiting grooves, and bolts are provided through the limiting grooves. The bolts are installed on the housing, so that the sliding cover 11 can slide relative to the housing in a limited manner.

[0077] In some preferred embodiments, the tooth shape of the sliding rack is the same as the tooth shape of the lock tooth A1, both are "Great Wall-shaped", each tooth is rectangular or square; the tooth gap is also the same; Figure 2-4 shown.

[0078] In some preferred embodiments, the limit adjustment assembly 30 includes a movable handle 31, an adjustment pressure block 32, a mounting block 33, a torsion spring 34, and a latch 35;

[0079] The movable handle 31 is movably connected to the lower cover 21;

[0080] The adjusting pressing block 32 is fixedly sleeved on the movable rotating handle 31 and is placed above the cylinder mounting hole of the lower cover 21;

[0081] The mounting block 33 is fixedly sleeved on the movable handle 31;

[0082] One end of the torsion spring 34 is fixedly mounted on the mounting block 33, and the other end thereof is connected to the latch 35;

[0083] The latch pin 35 is movably connected to the alignment hole of the Xiaoyao component.

[0084] In some preferred embodiments, the limit adjustment assembly 30 further includes a clamp 36 and a column 37 with a "C"-shaped cross section;

[0085] The latch 35 moves transversely and penetrates the column 37;

[0086] The clamp 36 is sleeved on the latch 35 and is located in the column 37 . The clamp 36 is used to limit the travel range of the latch 35 .

[0087] In some preferred embodiments, the travel limit plate 40 of the Xiaoyao component is fixed to the inner wall of the upper cover and is arranged vertically;

[0088] The travel limit plate 40 is formed with a plurality of alignment holes; and the travel limit plate 40 is disposed on one side of the column 37 .

[0089] In some preferred embodiments, the middle portion of the movable handle 31 is bent and inclined relative to both ends thereof, and a sheet-shaped gripping portion is formed at the end of the movable handle.

[0090] In some preferred embodiments, the sliding cover 11 is used to connect to the seat cushion;

[0091] The lower cover 21 is used to connect and install the cylinder;

[0092] The rocker assembly is used for the seat cushion to rock relative to the cylinder.

[0093] In some preferred embodiments, the buffer assembly includes a backrest connecting seat, a lower rotating shaft, an upper rotating shaft, a sleeve, a return spring, a tension connecting block, a support rod, and a sliding block; the lower rotating shaft passes through the backrest connecting seat, and the backrest connecting seat is rotatably connected to the lower cover through the lower rotating shaft, the upper rotating shaft is located obliquely above the lower rotating shaft, and the upper rotating shaft passes through the backrest connecting seat, the two ends of the upper rotating shaft are respectively sleeved with the sleeves, and the two sides of the upper cover are respectively sleeved on the two sleeves; the backrest connecting seat forms a lever structure with the lower cover and the upper cover through the lower rotating shaft and the upper rotating shaft respectively;

[0094] The tensioning connection block is installed at one end of the lower cover, and the tensioning connection block and the lower rotating shaft are respectively located at two ends of the lower cover;

[0095] One end of the return spring is sleeved on the upper rotating shaft, and the other end is sleeved on the tensioning connection block;

[0096] One end of the support rod is fixed to the inner side of the upper cover, and the other end of the support rod is fixed to the sliding block;

[0097] The sliding block is cylindrical, and the two side walls of one end of the lower cover are respectively formed with linear sliding grooves, and the sliding block can slide within the sliding grooves;

[0098] The length direction of the slide groove is inclined relative to the bottom surface of the lower cover.

[0099] In some preferred embodiments, a backrest connecting base is used to install and connect a seat backrest.

[0100] The working principle of the buffer component of this application:

[0101] When the human body leans back, the seat back tilts backward, causing the backrest connecting seat to rotate relative to the lower cover around the lower rotating shaft, and then the upper rotating shaft also rotates around the lower rotating shaft, so that one end of the upper cover rotates relative to one end of the lower cover. In this process, due to the change in the relative position of the upper cover and the lower cover, the other end of the upper cover is also pulled, and then the sliding block connected to the upper cover slides relative to the sliding groove on the lower cover.

[0102] During the above process of the human body lying down, the upper cover will produce two movements in the upward and backward directions; and when the human body returns to the upright sitting state from the lying state, two movements opposite to the above movements will occur.

[0103] In order to achieve the "free and easy" effect in the prior art, the chassis can only move in one direction, while in this application, the chassis can move in two directions, and during these two movements, the upper surface of the upper cover and the lower surface of the lower cover are almost always parallel. Furthermore, compared with the prior art, this application saves more effort when leaning back and lying flat. When returning to the original position, the human body can use its own gravity to press down, and the human waist will exert less force, which is more labor-saving.

[0104] In some preferred embodiments, the tensioning connection block is rotatably connected to the lower cover, and the rotation angle of the tensioning connection block relative to the lower cover is adjusted by an adjustment component to adjust the elongation of the return spring. The adjustment component can be realized by the prior art and will not be described in detail here.

[0105] In other preferred embodiments, the tensioning connection block is fixed on the lower cover.

[0106] In the present application, the buffer component may also be referred to as a Xiaoyao component, which is used for the "Xiaoyao" swing to achieve the backward leaning and returning of the human body.

[0107] Further reading Figure 5 , Figure 8 as well as Fig. 9 In some preferred embodiments, the buffer assembly includes a backrest connecting seat 51, a lower rotating shaft 52, an upper rotating shaft 53, a sleeve 54, a return spring 55, a tensioning connecting block 56, a support rod 57, and a sliding block 58; the lower rotating shaft 52 passes through the backrest connecting seat 51, and the backrest connecting seat 51 is rotatably connected to the lower cover 21 through the lower rotating shaft 52, the upper rotating shaft 53 is located obliquely above the lower rotating shaft 52, and the upper rotating shaft 53 passes through the backrest connecting seat 51, and the two ends of the upper rotating shaft 53 are respectively sleeved with the sleeves 54, and the two sides of the upper cover 22 are respectively sleeved on the two sleeves 54; the backrest connecting seat 51 forms a lever structure with the lower cover 21 and the upper cover 22 through the lower rotating shaft 52 and the upper rotating shaft 53;

[0108] The tensioning connection block 56 is installed at one end of the lower cover 21, and the tensioning connection block 56 and the lower rotating shaft 52 are respectively located at two ends of the lower cover 21;

[0109] One end of the return spring 55 is sleeved on the upper rotating shaft 53, and the other end thereof is sleeved on the tensioning connection block 56;

[0110] One end of the support rod 57 is fixed to the inner side of the upper cover 22, and the other end thereof is fixed with the sliding block 58;

[0111] The sliding block 58 is cylindrical, and the two side walls of one end of the lower cover 21 are respectively formed with linear sliding grooves A3, and the sliding block 58 can slide within the sliding grooves A3;

[0112] The length direction of the slide groove A3 is inclined relative to the bottom surface of the lower cover 21 .

[0113] In some preferred embodiments, the backrest connecting seat 51 is used to install and connect the seat backrest.

[0114] The working principle of the buffer component of this application:

[0115] When the human body leans back, the seat back tilts backward, causing the backrest connecting seat 51 to rotate relative to the lower cover 21 around the lower rotating shaft 52, and then causing the upper rotating shaft 53 to rotate around the lower rotating shaft 52, so that one end of the upper cover 22 rotates relative to one end of the lower cover 21. In this process, due to the change in the relative position of the upper cover 22 and the lower cover 21, the other end of the upper cover 22 is also pulled, and then the sliding block 58 connected to the upper cover 22 slides relative to the sliding groove A3 on the lower cover 21.

[0116] During the above process of the human body lying down, the upper cover 22 will generate two movements in the upward and backward directions; and when the human body returns to the upright sitting state from the lying state, two movements opposite to the above movements will be generated.

[0117] In order to achieve the "free and easy" effect in the prior art, the chassis can only move in one direction, while in the present application, the chassis can move in two directions, and during these two movements, the upper surface of the upper cover 22 and the lower surface of the lower cover 21 are almost always parallel. Furthermore, compared with the prior art, the present application saves more effort when leaning back and lying flat, and when returning to the original position, the human body can use its own gravity to press down, and the human waist will exert less force, which is more labor-saving.

[0118] In some preferred embodiments, the tensioning connection block 56 is rotatably connected to the lower cover 21, and the rotation angle of the tensioning connection block 56 relative to the lower cover 21 is adjusted by an adjustment component to adjust the elongation of the return spring 55. The adjustment component can be realized in the prior art and will not be described in detail here.

[0119] In other preferred embodiments, the tensioning connection block 56 is fixed on the lower cover 21 .

[0120] In the present application, the buffer component may also be referred to as a Xiaoyao component, which is used for the "Xiaoyao" swing to achieve the backward leaning and returning of the human body.

[0121] The simple seat chassis device described in the present application has a labor-saving effect compared with the prior art, and its structure is well simplified compared with the prior art.

[0122] First, the simple seat chassis device of the present application and the relaxing assembly are more labor-saving than the prior art, and are more labor-saving when lying down and more labor-saving when rebounding and sitting upright. Under such a structure, relaxing is easier.

[0123] Secondly, the simple seat chassis device of the present application can realize the lateral sliding of the seat cushion through the sliding assembly 10. When the seat cushion slides horizontally, there are mainly two structures involved, one is the sliding rack 12, and the other is the transverse locking block 14. When the handle lever 15 is rotated, the transverse locking block 14 will be pushed horizontally and produce a lateral movement relative to the locking block limit sleeve 13, which changes the relative position of the sliding rack 12 and the transverse locking block 14, thereby allowing the sliding rack 12 to pass smoothly relative to the transverse locking block 14, thereby allowing the sliding cover 11 to slide horizontally relative to the shell 20. When the handle lever 15 is released, under the push of the elastic member, the sliding rack 12 is engaged with the lock tooth A1 of the transverse locking block 14, thereby preventing the sliding rack 12 from moving relative to the shell 20, thereby achieving relative fixation of the sliding cover 11 and the shell 20.

[0124] Thirdly, the limit adjustment component 30 can realize both the pressing operation of the cylinder and the limit of the free movement. One set of structure realizes multiple functions, thus simplifying the overall structure.

[0125] Finally, it should be noted that the simplicity of the seat chassis device of the present application is reflected in that, compared with the labor-saving seat chassis, the structure of the present application is simpler. In other words, the seat chassis device of the present application is both labor-saving and simple in structure.

[0126] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A simple seat chassis device, characterized in that: It includes a housing, a sliding assembly, a free-range assembly, and a limit adjustment assembly; The sliding assembly, the remote assembly, and the limit adjustment assembly are respectively mounted on the housing; The sliding assembly includes a sliding cover, a sliding rack, a transverse locking block, a locking block limiting sleeve, a handle lever, and an elastic member; The sliding cover is slidably connected to the shell, and the sliding rack is fixedly arranged along the length direction of the shell and movably penetrates the shell; The transverse locking block is formed with a locking tooth, which is movably matched with the sliding rack; The locking block limiting sleeve is installed in the housing, and the locking block limiting sleeve forms a limiting groove; The transverse locking block is movably sleeved in the limiting groove of the locking block limiting sleeve, and the elastic member is installed between one end of the transverse locking block and the end surface of the limiting groove; The handle lever is rotatably connected to the outside of the housing; The handle lever is in contact with the other end of the transverse locking block.

2. The simple seat chassis device according to claim 1, characterized in that: The middle part of the transverse locking block is respectively formed with a concave position and the locking teeth. The recess is adjacent to the locking tooth, and the recess is used for the sliding rack to slide smoothly, and the locking tooth is used for meshing with the sliding rack and locking the sliding rack.

3. The simple seat chassis device according to claim 2, characterized in that: The handle lever is in an "L" shape, and a straight section thereof is rotatably connected to the housing via a rotation limit block; The end of the straight section of the handle lever abuts against the other end of the transverse locking block.

4. The simple seat chassis device according to claim 3, characterized in that: The elastic member is a spring, A circular hole is formed at one end of the transverse locking block, and one end of the spring is sleeved in the circular hole.

5. The simple seat chassis device according to any one of claims 1 to 4, characterized in that: The housing comprises an upper cover and a lower cover; The Xiaoyao components are connected to the upper cover and the lower cover respectively.

6. The simple seat chassis device according to claim 5, characterized in that: The limit adjustment assembly includes a movable handle, an adjustment pressure block, a mounting block, a torsion spring, and a latch; The movable turning handle is movably connected to the lower cover; The regulating pressing block is fixedly sleeved on the movable rotating handle and is placed above the cylinder mounting hole of the lower cover; The mounting block is fixedly sleeved on the movable rotating handle; One end of the torsion spring is fixedly mounted on the mounting block, and the other end of the torsion spring is connected to the latch; The latch is movably connected to the alignment hole of the Xiaoyao component.

7. The simple seat chassis device according to claim 6, characterized in that: The limit adjustment assembly also includes a clamp and a column with a "C"-shaped cross section; The latch moves transversely and penetrates the column; The clamp is sleeved on the latch and is located in the column. The clamp is used to limit the travel range of the latch.

8. The simple seat chassis device according to claim 7, characterized in that: The travel limit plate of the Xiaoyao component is fixed to the inner wall of the upper cover and is arranged vertically; A plurality of alignment holes are formed on the travel limit plate; and the travel limit plate is placed on one side of the column.

9. The simple seat chassis device according to claim 7, characterized in that: The middle part of the movable rotating handle is bent and inclined relative to the two ends thereof, and the end of the movable rotating handle is formed with a sheet-shaped gripping part.

10. The simple seat chassis device according to claim 7, characterized in that: The sliding cover is used to connect the seat cushion; The lower cover is used to connect and install the cylinder; The rocker assembly is used for the seat cushion to rock relative to the cylinder.

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