Seat chassis
By designing the seat chassis with the articulated structure and adjustment mechanism, the problem that traditional seat chassis is difficult to adapt to the rebound needs of different users is solved, achieving higher user comfort and stability.
Patent Information
- Application Number
- CN202510456840.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-12
- Publication Date
- 2025-05-30
AI Technical Summary
The traditional seat chassis is difficult to adapt to the rebound needs of different users, resulting in insufficient user comfort experience.
A seat chassis is designed, adopting an articulated structure and an adjustment mechanism to transmit the rebound force of the elastic member through the first connector and the second connector. The adjustment mechanism can adjust the distance between the first connector and the tail seat, thereby adjusting the rebound force of the elastic member.
It realizes adaptation to the rebound needs of different users, improves user comfort, and reduces shaking and noise through a stable articulation system and adjustment mechanism.
Smart Images
Figure CN120052669A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of furniture, and particularly to a seat chassis. Background Art
[0002] As one of the core components of modern seats, the chair chassis plays a crucial role in enhancing the functionality and comfort of seats. With the increasing attention of people to the working environment and personal health, chairs with flexible adjustment functions have gradually become the mainstream in the market. When traditional chairs are adjusted, the chassis of the seat needs to be used to achieve multi-angle tilting of the backrest and effective support for the body weight, so as to relieve the discomfort caused by sitting for a long time.
[0003] A general seat chassis includes a base, a tail seat, a top seat, a first connecting seat and a second connecting seat; the tail seat is hinged to the rear of the base; the first connecting seat is hinged to the front of the base; both ends of the second connecting seat are respectively hinged to the tail seat and the top seat; the base is connected to the chair legs, the top seat is connected to the seat, and the tail seat is connected to the backrest; an elastic member is provided on the tail seat and is connected to the base by the elastic member to generate an elastic force to provide the rebound of the backrest. Although the elastic force of the elastic member can provide a comfortable experience, different users, such as different ages, weights and postures, have different required rebound effects. It is difficult for a general seat base to adapt to the rebound requirements of different users and it is difficult for different users to obtain a more comfortable use experience. Summary of the Invention
[0004] In order to improve the above problems, this application provides a seat chassis.
[0005] A seat chassis provided by this application adopts the following technical solutions: A seat chassis includes a base, a tail seat, a top seat, a first connecting seat, a second connecting seat and an elastic member; the base is hinged to the tail seat, and the elastic member is provided between the base and the tail seat, and the elastic member provides the rebound between the base and the tail seat; one end of the first connecting seat is hinged to the base and the other end is hinged to the top seat; one end of the second connecting seat is hinged to the base and the other end is hinged to the tail seat and is connected to the elastic member; it further includes a first connecting member, a second connecting member and an adjusting mechanism; one end of the first connecting member is hinged to the base and the other end is hinged to the elastic member; one end of the second connecting member is hinged to the elastic member and the other end is hinged to the second connecting seat; the adjusting mechanism is installed on the base and extends to the first connecting member, and by adjusting the distance between the first connecting member and the tail seat, the rebound force of the elastic member is adjusted, so that the elastic force of the elastic member is transmitted to the second connecting seat, the base and the top seat through the second connecting member.
[0006] By adopting the above technical solution, the first connecting member can bear the elastic force of the elastic member, so that the elastic force transmitted by the elastic member can be transmitted to the second connecting seat through the second connecting member. The second connecting seat is hinged to the tail seat and the top seat, so that the elastic member provides the resilience effect of the tail seat and the top seat, improving the user's comfort. The adjusting mechanism can adjust the distance between the first connecting member and the tail seat, so as to adjust the resilience of the elastic member, so that the elastic member provides resilience with different force magnitudes after being adjusted, and is transmitted to the second connecting seat, the base and the top seat through the second connecting member, adapting to different groups of people with different needs and giving different comfortable experiences.
[0007] Optionally, one end of the base is provided with a first hinge shaft, and one end of the first connecting seat, the elastic member and the first connecting member are all hinged to the base through the first hinge shaft; a second hinge shaft is provided in the middle section of the tail seat, and the second connecting seat is hinged to the tail seat through the second hinge shaft; one end of the top seat is provided with a third hinge shaft, and one end of the first connecting seat away from the first hinge shaft is hinged to the top seat through the third hinge shaft; one end of the top seat away from the third hinge shaft is provided with a fourth hinge shaft, and one end of the second connecting seat away from the second hinge shaft is hinged to the top seat through the fourth hinge shaft; the first connecting member is provided with a fifth hinge shaft, and one end of the elastic member away from the first hinge shaft is hinged to the first connecting member through the fifth hinge shaft; one end of the second connecting member is hinged to the second hinge shaft, and the other end is hinged to the fifth hinge shaft; one end of the tail seat close to the base is provided with a sixth hinge shaft, and the base is hinged to the tail seat through the sixth hinge shaft.
[0008] By adopting the above technical solution, through the first hinge shaft - the sixth hinge shaft, the base, the tail seat, the top seat, the first connecting seat, the elastic member, the second connecting seat, the first connecting member and the second connecting member are connected to form a complete hinge system, so as to ensure that when the elastic member is adjusted by the adjusting mechanism, the resilience can be transmitted to each structure by using the complete hinge system, improving the comfort experience.
[0009] Optionally, a first arc-shaped tooth seat is further provided at one end of the base away from the first hinge shaft, and a second arc-shaped tooth seat is provided at one end of the second connecting seat close to the first arc-shaped tooth seat, and the first arc-shaped tooth seat meshes with the second arc-shaped tooth seat.
[0010] By adopting the above technical solution, when the first arc-shaped tooth seat and the second arc-shaped tooth seat are engaged, the rotation angle of the second connecting seat around the second hinge shaft is restricted, ensuring the stability of the tailstock linkage process. At the same time, by adjusting the engagement of the second connecting seat with the external teeth at different positions on the first arc-shaped tooth seat, the initial position of the second connecting seat can be changed, thereby adjusting the linkage path of the tailstock, improving the versatility of the chassis, and increasing the adjustment range of the top seat angle. The mutual engagement of the first arc-shaped tooth seat and the second arc-shaped tooth seat makes the linkage process more stable, reducing shaking and noise, and providing a better user experience.
[0011] Optionally, the adjusting mechanism includes an adjusting rod, a first bevel gear, a second bevel gear, a rotating shaft, a sliding part, and a pivot bearing; the adjusting rod is pivotally connected to the base and extends outward through the base; one end of the adjusting rod located inside the base is connected with the first bevel gear; the pivot bearing is provided on the base, the rotating shaft is pivotally connected with the pivot bearing, an external thread is provided on the rotating shaft, and the second bevel gear is installed on the rotating shaft; the sliding part is slidably connected with the first connecting piece, and a threaded hole is provided in the sliding part, and the sliding part is screwed with the rotating shaft through the threaded hole.
[0012] By adopting the above technical solution, when the user rotates the adjusting rod outside the base, the first bevel gear is driven by the adjusting rod to drive the second bevel gear and the rotating shaft to rotate. During the rotation process, the sliding part is affected by the screwing effect of the threaded hole, driving the position of the first connecting piece to change, thereby changing the stretching degree of the elastic piece hinged to the first connecting piece, making the resilience of the elastic piece change, and cooperating with the second connecting piece to change the resilience force received by the tailstock and the top seat, making the user experience more comfortable.
[0013] Optionally, a pivot opening is provided on the base, the adjusting rod extends outward through the pivot opening, and a telescopic limiting column is further provided on the adjusting rod, and the limiting column is clamped with the pivot opening.
[0014] By adopting the above technical solution, the position of the adjusting rod can be fixed in the pivot opening by using the limiting column to prevent the adjusting rod from shifting.
[0015] Optionally, the first connecting piece includes two connecting plates, a fixing plate, a seventh hinge shaft, and a hinge kit; hinge openings are provided at both ends of the two connecting plates, the two connecting plates are connected by the fixing plate, and the two connecting plates are bent towards the base direction, and the seventh hinge shaft is provided at the hinge opening of the bent end; the hinge kit is hinged at the seventh hinge shaft, and the other end of the hinge kit is hinged with the fifth hinge shaft; a sliding opening is provided at the bent part of the connecting plate, and the sliding part is hingedly connected with the sliding opening.
[0016] By adopting the above technical solution, when the adjusting rod rotates to drive the sliding part, the sliding part is located within the sliding opening and is restricted by the two connecting plates, and thus rises and falls along the sliding part to drive the connecting plates to rotate along the first hinge axis. The bent ends of the connecting plates synchronously drive the seventh hinge axis and the hinge kit to rotate in the circumferential direction, causing the seventh hinge axis and the hinge kit to push the fifth hinge axis connected to the elastic member in the circumferential direction, thereby changing the position of the fifth hinge axis, and the elastic member hinged to the fifth hinge axis can be adjusted.
[0017] Optionally, the base is further provided with a buffer mechanism. The buffer mechanism has a linkage end and a buffer end. The linkage end is connected to the rotating shaft, and the buffer end is movably connected to the top seat to provide buffering for the top seat.
[0018] By adopting the above technical solution, when the top seat is pressed down, pressure can be applied to the buffer end, and the buffer end provides elastic force for buffering, thereby providing buffering for the top seat. With the rotation of the linkage end, the magnitude of the elastic force of the buffer end is changed, so as to adapt to the comfort of different people.
[0019] Optionally, the buffer mechanism includes an extension part, a lifting part, a linkage rod, a hinge frame and a buffer part; a chute is provided on the extension part, and the lifting part is slidably connected in the chute, and a threaded hole is opened in the lifting part; the linkage rod is connected to the rotating shaft, and an external thread is provided on the outer wall of the linkage rod and is screwed to the threaded hole through the external thread; the hinge frame is installed on the lifting part; one end of the buffer part is hinged to the hinge frame, and the other end is hinged to the top seat and provides a buffering effect.
[0020] By adopting the above technical solution, the rotation of the adjusting rod drives the rotation of the rotating shaft, synchronously drives the rotation of the linkage shaft. The lifting part is screwed to the linkage shaft through the threaded hole and rises and falls along the chute of the extension part under the rotation action, synchronously driving the hinge frame to rise and fall, so as to adjust the distance between the buffer part and the top seat by using the hinge frame, so that the elasticity provided by the buffer part is adjusted to adapt to the buffer force required by different users and the usage habits of different people.
[0021] Optionally, the buffer part includes a buffer cylinder, a buffer rod and an elastic part; the buffer cylinder is hinged to the hinge frame; the buffer rod is inserted into the buffer cylinder, and the elastic part is located in the buffer cylinder and is connected to the buffer rod to provide elastic buffer force; one end of the buffer rod away from the buffer cylinder is hinged to the top seat.
[0022] By adopting the above technical solution, when the hinge frame rises and falls following the lifting part, the angle between the buffer cylinder and the hinge frame will continuously change, causing the depth of the buffer rod inserted into the buffer cylinder to change, so that the extrusion force of the elastic part by the buffer rod changes, so as to change the buffer elastic force exerted by the elastic part on the buffer rod.
[0023] Optionally, at least two sets of the buffer parts are provided and are respectively hinged to both sides of the top seat.
[0024] By adopting the above technical solution, the more the number of the buffer parts is set, the more obvious the obtained buffer effect is, and more buffer force application points are provided, reducing the pressure borne by a single buffer part and reducing the risk of damage to the buffer part.
[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The first connecting piece can bear the elastic force of the elastic piece, so that the elastic force transmitted by the elastic piece can be transmitted to the second connecting seat through the second connecting piece. The second connecting seat is hinged to the tail seat and the top seat, so that the elastic piece provides a rebounding effect for the tail seat and the top seat, improving the user's comfort. The adjusting mechanism can adjust the distance between the first connecting piece and the tail seat, so as to adjust the rebounding force of the elastic piece, so that the elastic piece provides a rebounding force of different magnitudes after being adjusted, which is transmitted to the second connecting seat, the base and the top seat through the second connecting piece, adapting to different groups of people with different needs and giving different comfortable experiences; 2. Through the first hinge shaft to the sixth hinge shaft, the base, the tail seat, the top seat, the first connecting seat, the elastic piece, the second connecting seat, the first connecting piece and the second connecting piece are connected to form a complete hinge system, so as to ensure that when the elastic piece is adjusted by the adjusting mechanism, the rebounding force can be transmitted to each structure by using the complete hinge system, improving the comfort experience; 3. When the first arc-shaped tooth seat and the second arc-shaped tooth seat are engaged, the rotation angle of the second connecting seat around the second hinge shaft is limited, ensuring the stability of the linkage process of the tail seat. At the same time, by adjusting the external teeth at different positions on the second connecting seat and the first arc-shaped tooth seat to be engaged, the initial position of the second connecting seat can be changed, and then the linkage path of the tail seat can be adjusted, improving the versatility of the chassis. The adjustment range of the angle of the top seat can also be increased. The engagement of the first arc-shaped tooth seat and the second arc-shaped tooth seat makes the linkage process more stable, reducing shaking and noise, and enabling the user to obtain a better use experience; 4. When the user rotates the adjusting rod outside the base, the first bevel gear is driven by the adjusting rod to drive the second bevel gear and the rotating shaft to rotate. During the rotation process, the sliding part is subjected to the screwing effect of the threaded hole, driving the position of the first connecting piece to change, thereby changing the stretching degree of the elastic piece hinged to the first connecting piece, so that the rebounding force of the elastic piece changes, and cooperating with the second connecting piece to make the rebounding forces received by the tail seat and the top seat change, making the user experience more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a three-dimensional structural schematic diagram of a seat chassis in an embodiment of the present application; Figure 2It is an exploded structural schematic diagram of a seat chassis in some embodiments of the present application; Figure 3 It is a three-dimensional structural schematic diagram of a seat chassis with some hidden structures in some embodiments of the present application; Figure 4 It is a schematic diagram of the style structure of a first connecting member and a second connecting member in some embodiments of the present application; Figure 5 It is a partial exploded structural schematic diagram of a first connecting member and an adjusting mechanism in some embodiments of the present application; Figure 6 It is a first three-dimensional structural schematic diagram of a first connecting member in some embodiments of the present application; Figure 7 It is a second three-dimensional structural schematic diagram of a first connecting member in some embodiments of the present application; Figure 8 It is a cross-sectional structural schematic diagram of a partial buffer mechanism in a side view direction in some embodiments of the present application; The reference signs in the drawings are: 1, base; 11, first hinge shaft; 12, first arc-shaped tooth seat; 13, pivot port; 2, tail seat; 21, second hinge shaft; 22, sixth hinge shaft; 3, top seat; 31, third hinge shaft; 32, fourth hinge shaft; 4, first connecting seat; 5, second connecting seat; 51, second arc-shaped tooth seat; 6, elastic member; 7, first connecting member; 71, fifth hinge shaft; 72, connecting plate; 721, sliding port; 73, fixing plate; 74, seventh hinge shaft; 75, hinge kit; 8, second connecting member; 9, adjusting mechanism; 91, adjusting rod; 911, limiting post; 92, first bevel gear; 93, second bevel gear; 94, rotating shaft; 95, sliding part; 96, pivot bearing; 10, buffer mechanism; 101, extension part; 102, lifting part; 103, linkage rod; 104, hinge frame; 105, buffer part; 1051, buffer cylinder; 1052, buffer rod; 1053, elastic part. Detailed implementation manners
[0027] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the information disclosed in the present application. The present application can also be implemented or applied through other different specific implementation manners. Various details in the present application can also be modified or changed according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that, without conflict, the embodiments and features in the embodiments of the present application can be combined with each other.
[0028] The following will be a detailed description of the embodiments of the present application with reference to the accompanying drawings, so that those skilled in the technical field to which the present application belongs can easily implement it. The present application can be embodied in various different forms and is not limited to the embodiments described herein.
[0029] In the description of the present application, the reference to expressions such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics represented in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics represented can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples represented in the present application and the features of different embodiments or examples.
[0030] In addition, the terms "first" and "second" are only used for indication purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.
[0031] Throughout the specification, when it is said that a device is "connected" to another device, this includes not only the case of "direct connection", but also the case of "indirect connection" with other elements placed therebetween. In addition, when it is said that a certain device "includes" a certain component, unless there is a particularly contrary record, it does not exclude other components, but means that other components can also be included.
[0032] The following will be a further detailed description of the present application in conjunction with the attached Figure 1 - attached Figure 8 , drawings.
[0033] An embodiment of the present application discloses a seat chassis.
[0034] A seat chassis, as shown in reference to Figure 1 and Figure 2 , includes a base 1, a tail seat 2, a top seat 3, a first connecting seat 4, a second connecting seat 5, and an elastic member 6; the base 1 is connected to the chair legs, the top seat 3 is connected to the seat, and the tail seat 2 is connected to the backrest, forming a complete seat structure. The base 1 is hinged to the tail seat 2, and an elastic member 6 is provided between the base 1 and the tail seat 2. The elastic member 6 provides resilience between the base 1 and the tail seat 2, making the backrest more comfortable when bearing a load.
[0035] One end of the first connecting seat 4 is hinged to the base 1, and the other end is hinged to the top seat 3. One end of the second connecting seat 5 is hinged to the base 1, and the other end is hinged to the tail seat 2 and is connected to the elastic member 6. The base 1, the top seat 3, and the tail seat 2 are interconnected by the first connecting seat 4 and the second connecting seat 5. The hinged effect makes the rotation of the top seat 3 and the tail seat 2 more flexible. With the elastic force of the elastic member 6, a more comfortable riding experience is provided.
[0036] It further includes a first connecting member 7, a second connecting member 8, and an adjusting mechanism 9. The first connecting member 7 is installed on the base 1, with one end hinged to the elastic member 6 and the other end hinged to the base 1. The first connecting member 7 can bear the elastic force of the elastic member 6.
[0037] One end of the second connecting member 8 is hinged to the elastic member 6, and the other end is hinged to the second connecting seat 5, so that the elastic force transmitted by the elastic member 6 can be transmitted to the second connecting seat 5 through the second connecting member 8. The second connecting seat 5 is hinged to the tail seat 2 and the top seat 3. Thus, the elastic force provided by the elastic member 6 for rebounding can make the backrest and seat connected to the tail seat 2 and the top seat 3 more resilient, improving the comfort of the user.
[0038] The adjusting mechanism 9 is installed on the base 1 and extends to the first connecting member 7. The adjusting mechanism 9 can adjust the distance between the first connecting member 7 and the tail seat 2, thereby adjusting the rebounding force of the elastic member 6, so that the elastic member 6 provides rebounding forces of different magnitudes after adjustment, which are transmitted to the second connecting seat 5, the base 1, and the top seat 3 through the second connecting member 8, adapting to different groups of people with different needs and giving different comfortable experiences.
[0039] Among them, the elastic member 6 can be a spring, and spring seats are provided on both sides of the spring. The spring is hinged to the base 1 and the first connecting member 7 by using the spring seats.
[0040] Further, referring to Figure 3 As shown, one end of the base 1 is provided with a first hinge shaft 11. One ends of the first connecting seat 4, the elastic member 6, and the first connecting member 7 are all hinged to the base 1 through the first hinge shaft 11. In this application, the hinged method adopts the way of inserting the hinge shaft into the hinge hole. Therefore, the base 1, the tail seat 2, the top seat 3, the first connecting seat 4, the elastic member 6, the second connecting seat 5, the first connecting member 7, and the second connecting member 8 are all provided with hinge holes. After being inserted with the corresponding hinge shafts, they can pivot along the hinge shafts to achieve the hinged effect.
[0041] A second hinge shaft 21 is provided in the middle section of the tail seat 2. The second connecting seat 5 is hinged to the tail seat 2 through the second hinge shaft 21. The second hinge shaft 21 in the middle section of the tail seat 2 is not connected to the base 1. Therefore, its position can be changed to facilitate the adjustment of the angle of the backrest.
[0042] One end of the top seat 3 is provided with a third hinge shaft 31. One end of the first connecting seat 4 away from the first hinge shaft 11 is hinged to the top seat 3 through the third hinge shaft 31. The other end of the top seat 3 is provided with a fourth hinge shaft 32. One end of the second connecting seat 5 away from the second hinge shaft 21 is hinged to the top seat 3 through the fourth hinge shaft 32. The top seat 3, as a structure connected to the seat, can provide a bearing through the third hinge shaft 31 and the fourth hinge shaft 32.
[0043] The first connecting member 7 is provided with a fifth hinge shaft 71. One end of the elastic member 6 away from the first hinge shaft 11 is hinged to the first connecting member 7 through the fifth hinge shaft 71. One end of the second connecting member 8 is hinged to the second hinge shaft 21, and the other end is hinged to the fifth hinge shaft 71. The fifth hinge shaft 71 is not directly pivotally connected to the base 1 or the top seat 3, so it does not have a fixed position. Therefore, the fifth hinge shaft 71 and the structure hinged on the fifth hinge shaft 71 can change their positions.
[0044] One end of the tail seat 2 close to the base 1 is provided with a sixth hinge shaft 22. The base 1 is hinged to the tail seat 2 through the sixth hinge shaft 22. The sixth hinge shaft 22 is pivotally connected to the base 1 and the tail seat 2, so its position is fixed. The tail seat 2 can rotate along the sixth hinge shaft 22 to adjust the rotation angle.
[0045] Specifically, through the first hinge shaft 11 - the sixth hinge shaft 22, the base 1, the tail seat 2, the top seat 3, the first connecting seat 4, the elastic member 6, the second connecting seat 5, the first connecting member 7 and the second connecting member 8 are connected to each other to form a complete hinge system, so as to ensure that when the elastic member 6 is adjusted by the adjusting mechanism 9, the resilience can be transmitted to each structure through the complete hinge system, improving the comfort experience.
[0046] Furthermore, referring to Figure 3 As shown, one end of the base 1 away from the first hinge shaft 11 is further provided with a first arc-shaped tooth seat 12. One end of the second connecting seat 5 close to the first arc-shaped tooth seat 12 is provided with a second arc-shaped tooth seat 51. The first arc-shaped tooth seat 12 meshes with the second arc-shaped tooth seat 51. A set of the first arc-shaped tooth seat 12 and the second arc-shaped tooth seat 51 are sequentially arranged on both sides of the base 1 and both sides of the second connecting seat 5. The cooperation of the two sets of the first arc-shaped tooth seat 12 and the second arc-shaped tooth seat 51 makes the meshing effect more stable.
[0047] The arc surfaces of the first arc-shaped tooth seat 12 and the second arc-shaped tooth seat 51 are both convex with external teeth, making the linkage process between the tailstock 2 and the top seat 3 more stable. Since the second hinge shaft 21 is hinged to the second connecting seat 5, and the second connecting seat 5 is meshed and connected to the first arc-shaped tooth seat 12 through the external teeth of the second arc-shaped tooth seat 51, when the second connecting seat 5 is subjected to elastic force or the pressure applied by the user to the top seat 3, the second connecting seat 5 rotates around the second hinge shaft 21 as the rotation center, and simultaneously rotates along the first arc-shaped tooth seat 12 through the second arc-shaped tooth seat 51, restricting the rotation orientation of the second connecting seat 5, and at the same time using the first arc-shaped tooth seat 12 to provide a certain supporting load, improving the swing stability of the tailstock 2 hinged to the second hinge shaft 21.
[0048] Specifically, when the first arc-shaped tooth seat 12 and the second arc-shaped tooth seat 51 are meshed, the rotation angle of the second connecting seat 5 around the second hinge shaft 21 is restricted, ensuring the stability of the linkage process of the tailstock 2. At the same time, by adjusting the meshing of the second connecting seat 5 with the external teeth at different positions on the first arc-shaped tooth seat 12, the initial position of the second connecting seat 5 can be changed, thereby adjusting the linkage path of the tailstock 2, improving the versatility of the chassis, and increasing the adjustment range of the angle of the top seat 3. The mutual meshing of the first arc-shaped tooth seat 12 and the second arc-shaped tooth seat 51 makes the linkage process more stable, reducing shaking and noise, and giving users a better use experience.
[0049] In some embodiments, referring to Figure 4 and Figure 5 as shown, the adjusting mechanism 9 includes an adjusting rod 91, a first bevel gear 92, a second bevel gear 93, a rotating shaft 94, a sliding part 95 and a pivot bearing 96; the adjusting rod 91 is pivotally connected to the base 1 and extends outward through the base 1, that is, the adjusting rod 91 can rotate in the base 1 to provide the required driving force for adjustment.
[0050] One end of the adjusting rod 91 located inside the base 1 is connected with a first bevel gear 92. A pivot bearing 96 is provided on the base 1. The rotating shaft 94 is pivotally connected to the pivot bearing 96. External threads are provided on the rotating shaft 94, and a second bevel gear 93 is installed on the rotating shaft 94. The first bevel gear 92 is meshed with the second bevel gear 93, so that by rotating the adjusting rod 91, the first bevel gear 92 can drive the second bevel gear 93 to rotate, and simultaneously drive the rotating shaft 94 to rotate.
[0051] The sliding part 95 is slidably connected to the first connecting member 7. The sliding part 95 can adopt the structure of a sliding rod or a sliding block. When the sliding part 95 is subjected to an adjusting drive, it can drive the first connecting member 7 to move. The sliding part 95 is provided with a threaded hole, and is screwed to the rotating shaft 94 through the threaded hole, so that when the rotating shaft 94 rotates, the sliding part 95 drives the first connecting member 7 to move.
[0052] Specifically, the user rotates the adjusting rod 91 outside the base 1. The first bevel gear 92 is driven by the adjusting rod 91 to drive the second bevel gear 93 and the rotating shaft 94 to rotate. During the rotation, the sliding part 95 is screwed by the threaded hole, driving the position of the first connecting member 7 to change, thereby changing the stretching degree of the elastic member 6 hinged to the first connecting member 7, causing the resilience of the elastic member 6 to change, and cooperating with the second connecting member 8 to change the resilience received by the tailstock 2 and the top seat 3, making the user experience more comfortable.
[0053] Further, referring to Figure 2 and Figure 4 As shown, a pivot port 13 is provided on the base 1. The adjusting rod 91 passes through the pivot port 13 and extends outward. The adjusting rod 91 is also provided with a retractable limiting post 911. At least two groups of limiting posts 911 can be provided. Specifically, a retractable groove is provided inside the adjusting rod 91. The limiting post 911 is inserted into the retractable groove, and an elastic structure is provided in the retractable groove, so that the limiting post 911 always extends out of the retractable groove. After the limiting post 911 extends out, its size is larger than the pivot port 13. Therefore, the limiting post 911 is clamped with the pivot port 13, and the position of the adjusting rod 91 can be fixed to prevent the position of the adjusting rod 91 from shifting. When replacement or repair is required, press the limiting post 911, and the limiting post 911 can be retracted into the retractable groove, and the adjusting rod 91 can be disassembled for repair.
[0054] Furthermore, a limiting block is provided at the top of the rotating shaft 94, and the sliding part 95 can be restricted from detaching from the rotating shaft 94 through the limiting block.
[0055] In some embodiments, referring to Figure 4 and Figure 6 As shown, the first connecting member 7 includes two connecting plates 72, a fixing plate 73, a seventh hinge shaft 74 and a hinge kit 75; hinge ports are provided at both ends of the two connecting plates 72. One end of the hinge port is hinged to the first hinge shaft 11. The two connecting plates 72 are connected by the fixing plate 73, and the two connecting plates 72 are bent towards the base 1. A seventh hinge shaft 74 is provided at the hinge port of the bent end. A hinge kit 75 is hinged at the seventh hinge shaft 74, and the other end of the hinge kit 75 is hinged to the fifth hinge shaft 71. The first connecting member 7 is not directly connected to the elastic member 6, but uses the hinge kit 75 to be connected to the elastic member 6 by means of hinging at both ends.
[0056] A sliding port 721 is provided at the bent part of the connecting plate 72. The sliding part 95 is hinged to the sliding port 721. The sliding port 721 can be a kidney-shaped port or a long strip-shaped port to adapt to the interference phenomenon that occurs when the sliding part 95 pushes the connecting plate 72.
[0057] Specifically, when the adjusting rod 91 rotates to drive the sliding part 95, the sliding part 95 is located within the sliding opening 721 and is restricted by the two connecting plates 72, then it moves up and down along the sliding part 95 to drive the connecting plate 72 to rotate along the first hinge axis 11. The bent end of the connecting plate 72 synchronously drives the seventh hinge axis 74 and the hinge kit 75 to rotate in the circumferential direction, causing the seventh hinge axis 74 and the hinge kit 75 to push the fifth hinge axis 71 connected to the elastic member 6 in the circumferential direction, thereby changing the position of the fifth hinge axis 71, and the elastic member 6 hinged to the fifth hinge axis 71 can be adjusted accordingly.
[0058] In some embodiments, as shown in Figure 7 and Figure 8 the base 1 is further provided with a buffer mechanism 10. The buffer mechanism 10 is used to provide comfortable buffering for the top seat 3, avoiding the top seat 3 providing a rigid feedback when the user presses down on the top seat 3, which affects the user experience.
[0059] The buffer mechanism 10 is provided with a linkage end and a buffer end. The linkage end is connected to the rotating shaft 94, such that the rotating shaft 94 can drive the linkage end to rotate. The buffer end is movably connected to the top seat 3. When the top seat 3 is pressed down, pressure can be applied to the buffer end, and the buffer end provides elastic force for buffering, thereby providing buffering for the top seat 3. Along with the rotation of the linkage end, the elastic force of the buffer end is changed, making it adaptable to the comfort levels of different people.
[0060] Furthermore, the buffer mechanism 10 includes an extension part 101, a linkage rod 103, a hinge frame 104, and a buffer part 105. The extension part 101 is connected to the base 1, and a chute is provided on the extension part 101. The extension part 101 is two extension slide rails, and the chutes of the extension slide rails are arranged oppositely. A lifting part 102 is slidably connected within the chute. The lifting part 102 can be a lifting frame, and both sides of the lifting frame are slidably connected to the two chutes. A threaded hole is formed within the lifting part 102.
[0061] The linkage rod 103 is connected to the rotating shaft 94, and an external thread is provided on the outer wall of the linkage rod 103. By screwing the external thread into the threaded hole, when the linkage rod 103 rotates, the lifting part 102 moves up and down along the chute through the threaded hole. The hinge frame 104 is installed on the lifting part 102 and can synchronously move up and down with the lifting part 102.
[0062] One end of the buffer part 105 is hinged to the hinge frame 104, and the other end is hinged to the top seat 3. The buffer part 105 is the buffer end. The buffer part 105 can synchronously adjust its position following the hinge frame 104, such that while the buffer part 105 provides buffering for the top seat 3, the buffer elastic force of the buffer part 105 can be adjusted through the lifting hinge frame 104.
[0063] Specifically, the rotation of the adjusting rod 91 drives the rotation of the rotating shaft 94, synchronously drives the rotation of the linkage shaft. The lifting part 102 is screwed to the linkage shaft through a threaded hole and is lifted or lowered along the sliding groove of the extension part 101 under the rotational action, synchronously driving the lifting of the hinge frame 104. Thus, the distance between the buffer part 105 and the top seat 3 is adjusted by using the hinge frame 104, so that the elasticity provided by the buffer part 105 is adjusted to adapt to the buffer force required by different users and the usage habits of different people. At the same time, by means of linkage with the adjusting mechanism 9, the adjusting mechanism 9 can not only provide the resilience adjustment of the elastic member 6, but also adjust the buffer force of the top seat 3.
[0064] Furthermore, the buffer part 105 includes a buffer cylinder 1051, a buffer rod 1052 and an elastic part 1053; the buffer cylinder 1051 is hinged to the hinge frame 104, and the buffer rod 1052 is inserted into the buffer cylinder 1051, so that the buffer rod 1052 can be inserted into or pulled out of the buffer cylinder 1051. The elastic part 1053 is located inside the buffer cylinder 1051 and is connected to the buffer rod 1052 to provide elastic buffer force. The elastic part 1053 can adopt a compression spring, and one end of the buffer rod 1052 away from the buffer cylinder 1051 is hinged to the top seat 3.
[0065] When the hinge frame 104 rises and falls with the lifting part 102, the angle between the buffer cylinder 1051 and the hinge frame 104 will continuously change, so that the depth of the buffer rod 1052 inserted into the buffer cylinder 1051 changes, thereby changing the extrusion force of the elastic part 1053 by the buffer rod 1052, so as to change the buffer elastic force exerted by the elastic part 1053 on the buffer rod 1052.
[0066] Among them, a limit protrusion can be provided at the mouth of the buffer cylinder 1051, a limit ring can be provided inside the buffer rod 1052, one end of the elastic part 1053 can be connected to the limit ring and wound around the buffer rod 1052, and the other end is connected to the inner bottom of the buffer cylinder 1051. The limit ring is restricted inside the buffer cylinder 1051 by the limit protrusion to prevent the buffer rod 1052 from detaching from the buffer cylinder 1051.
[0067] Still further, at least two groups of buffer parts 105 are provided, which are respectively hinged to both sides of the top seat 3 and are arranged staggeredly along the hinge frame 104. The buffer parts 105 can be provided with two groups or more than two groups, and are evenly hinged to the positions on both sides of the top seat 3. The more the number of the buffer parts 105 is set, the more obvious the obtained buffer effect is. However, the number is preferably an even number, so that it can be evenly distributed on both sides of the top seat 3 to ensure balanced force, and provide more buffer force application points, reduce the pressure on a single buffer part 105, and reduce the risk of damage to the buffer part 105.
[0068] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A seat chassis, comprising a base (1), a tail stock (2), a top stock (3), a first connecting seat (4), a second connecting seat (5) and an elastic member (6); the base (1) is hinged to the tail stock (2), the elastic member (6) is provided between the base (1) and the tail stock (2), and the elastic member (6) provides rebound between the base (1) and the tail stock (2); one end of the first connecting seat (4) is hinged to the base (1), and the other end is hinged to the top stock (3); one end of the second connecting seat (5) is hinged to the base (1), and the other end is hinged to the tail stock (2), and is connected to the elastic member (6), characterized in that: The invention also comprises a first connecting member (7), a second connecting member (8) and an adjusting mechanism (9); one end of the first connecting member (7) is hinged to the base (1), and the other end is hinged to the elastic member (6); one end of the second connecting member (8) is hinged to the elastic member (6), and the other end is hinged to the second connecting seat (5); the adjusting mechanism (9) is mounted on the base (1) and extends to the first connecting member (7); by adjusting the distance between the first connecting member (7) and the tail seat (2), the rebound force of the elastic member (6) is adjusted, so that the elastic force of the elastic member (6) is transmitted to the second connecting seat (5), the base (1) and the top seat (3) through the second connecting member (8).
2. A seat chassis according to claim 1, characterized in that: A first hinge shaft (11) is provided at one end of the base (1), and one end of the first connecting seat (4), the elastic member (6) and the first connecting member (7) are all hinged to the base (1) via the first hinge shaft (11); a second hinge shaft (21) is provided at the middle section of the tail seat (2), and the second connecting seat (5) is hinged to the tail seat (2) via the second hinge shaft (21); a third hinge shaft (31) is provided at one end of the top seat (3), and an end of the first connecting seat (4) away from the first hinge shaft (11) is hinged to the top seat (3) via the third hinge shaft (31); a fourth hinge shaft (21) is provided at one end of the top seat (3) away from the third hinge shaft (31). The first connecting member (7) is provided with a fifth hinge shaft (71), and the end of the elastic member (6) away from the first hinge shaft (11) is hinged to the first connecting member (7) through the fifth hinge shaft (71); one end of the second connecting member (8) is hinged to the second hinge shaft (21), and the other end is hinged to the fifth hinge shaft (71); the tail stock (2) is provided with a sixth hinge shaft (22) at one end close to the base (1), and the base (1) is hinged to the tail stock (2) through the sixth hinge shaft (22).
3. A seat chassis according to claim 2, characterized in that: The base (1) is further provided with a first arc-shaped tooth seat (12) at one end away from the first hinge shaft (11), and the second connecting seat (5) is provided with a second arc-shaped tooth seat (51) at one end close to the first arc-shaped tooth seat (12), and the first arc-shaped tooth seat (12) is meshed with the second arc-shaped tooth seat (51).
4. A seat chassis according to claim 1 or 2, characterized in that: The adjusting mechanism (9) comprises an adjusting rod (91), a first bevel gear (92), a second bevel gear (93), a rotating shaft (94), a sliding portion (95) and a pivot bearing (96); the adjusting rod (91) is pivotally connected to the base (1) and extends outward through the base (1); one end of the adjusting rod (91) located inside the base (1) is connected to the first bevel gear (92); the base (1) is provided with the pivot bearing (96), the rotating shaft (94) is pivotally connected to the pivot bearing (96), the rotating shaft (94) is provided with an external thread, and the second bevel gear (93) is mounted on the rotating shaft (94); the sliding portion (95) is slidably connected to the first connecting member (7), and the sliding portion (95) is provided with a threaded hole, and is threadedly connected to the rotating shaft (94) through the threaded hole.
5. A seat chassis according to claim 4, characterized in that: The base (1) is provided with a pivot opening (13), the adjustment rod (91) penetrates the pivot opening (13) and extends outwards, and the adjustment rod (91) is also provided with a retractable limiting column (911) which is clamped with the pivot opening (13) via the limiting column (911).
6. A seat chassis according to claim 4, characterized in that: The first connecting member (7) comprises two connecting plates (72), a fixing plate (73), a seventh hinge shaft (74) and a hinge assembly (75); hinge ports are provided at both ends of the two connecting plates (72); the two connecting plates (72) are connected via the fixing plate (73), and the two connecting plates (72) are bent toward the base (1); a seventh hinge shaft (74) is provided at the hinge ports at the bent ends; the hinge assembly (75) is hinged at the seventh hinge shaft (74), and the other end of the hinge assembly (75) is hinged to the fifth hinge shaft (71); a sliding opening (721) is provided at the bent portion of the connecting plate (72), and the sliding portion (95) is hingedly connected to the sliding opening (721).
7. A seat chassis according to claim 6, characterized in that: The base (1) is further provided with a buffer mechanism (10), the buffer mechanism (10) being provided with a linkage end and a buffer end, the linkage end being connected to the rotating shaft (94), and the buffer end being movably connected to the top seat (3) to provide buffering for the top seat (3).
8. A seat chassis according to claim 7, characterized in that: The buffer mechanism (10) comprises an extension portion (101), a lifting portion (102), a linkage rod (103), an articulated frame (104) and a buffer portion (105); the extension portion (101) is provided with a slide groove, the lifting portion (102) is slidably connected in the slide groove, and a threaded hole is provided in the lifting portion (102); the linkage rod (103) is connected to the rotating shaft (94), and an external thread is provided on the outer wall of the linkage rod (103), and is screwed to the threaded hole through the external thread; the articulated frame (104) is installed on the lifting portion (102); one end of the buffer portion (105) is hinged to the articulated frame (104), and the other end is hinged to the top seat (3), and provides a buffering effect.
9. A seat chassis according to claim 8, characterized in that: The buffer portion (105) comprises a buffer cylinder (1051), a buffer rod (1052) and an elastic portion (1053); the buffer cylinder (1051) is hinged to the hinged frame (104); the buffer rod (1052) is plugged into the buffer cylinder (1051); the elastic portion (1053) is located in the buffer cylinder (1051) and is connected to the buffer rod (1052) to provide elastic buffering force; the buffer rod (1052) is hinged to the top seat (3) at one end away from the buffer cylinder (1051).
10. A seat chassis according to claim 8, characterized in that: The buffer portion (105) is provided with at least two groups, which are respectively hinged to two sides of the top seat (3).