CN217048368U - Seat base framework - Google Patents

Abstract

The utility model discloses a seat base skeleton, including cushion frame and adjustment mechanism, the cushion frame is located adjustment mechanism's top, adjustment mechanism includes fixing base and linkage subassembly, the linkage subassembly includes that gangbar, linkage and cover are established pinion rack on the linkage, the both ends of gangbar respectively with fixing base rotatable coupling, the gangbar with be provided with the pretension part between the fixing base, the linkage includes first connecting rod and second connecting rod, first connecting rod cover is established on the gangbar, the second connecting rod respectively with first connecting rod with cushion frame rotatable coupling, the one end of cushion frame with fixing base rotatable coupling. The utility model discloses a seat base skeleton, its adjustment mechanism is simple, and is equipped with the pretension part between gangbar and fixing base, can improve the seat and take the strange sound that rocks the production that the clearance between the in-process leads to by the moving part at unmanned, improves the travelling comfort that the passenger took the in-process.

Description

Seat base frame

Technical Field

The utility model relates to a car seat technical field especially relates to a seat base skeleton.

Background

The car seat is the necessary configuration of automotive interior, also whether comfortable most direct embodiment of car owner perception vehicle, the main factor that influences the seat comfort still is the ergonomic design of seat, the ergonomic is also that people, the car, the direct relation of environment, through promoting more regulation directions of seat, and bigger control range, it can oneself adjust to think the most comfortable gesture of oneself to realize the user, promote through visible function, can give the more direct sensory stimulation of user, build one kind and have the experience of taking of science and technology sense more. However, the conventional seat has a complicated base adjusting mechanism, high manufacturing cost and difficult maintenance when damaged. The stability and strength of the seat are affected by more parts, vibration is generated when the automobile runs, the more parts, the more fit clearance is possibly existed, and the more unstable the seat is. Especially, the stability of the mechanism is important when the vibration is generated during the running of the automobile and the seat in the automobile can generate resonance.

Therefore, in combination with the above-mentioned technical problems, a new technical solution needs to be provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adopt less drive disk assembly to realize the upper and lower regulation of cushion skeleton, can reduce manufacturing cost, reduce and damage the probability to and improve the stability of base skeleton. Meanwhile, a pre-tightening component is arranged between the linkage rod and the fixed seat, so that abnormal sound generated by shaking caused by a gap between the moving parts in the process of unmanned sitting of the seat is improved, and the comfort of passengers in the process of sitting is further improved.

In order to realize the utility model purpose, the utility model provides a seat base skeleton, it includes cushion frame and adjustment mechanism, the cushion frame is located adjustment mechanism's top, adjustment mechanism includes fixing base and linkage subassembly, the linkage subassembly includes gangbar, linkage and cover and establishes pinion rack on the gangbar, the both ends of gangbar respectively with fixing base rotatable coupling, the gangbar with be provided with the pretension part between the fixing base, the linkage includes first connecting rod and second connecting rod, first connecting rod cover is established on the gangbar, the second connecting rod respectively with first connecting rod with cushion frame rotatable coupling, the one end of cushion frame with fixing base rotatable coupling.

Furthermore, the pre-tightening device is a coil spring, the coil spring is sleeved on the linkage rod, an outer ring end of the coil spring is connected with the fixed seat, and an inner ring end of the coil spring is connected with the linkage rod.

Further, the gangbar includes the gangbar main part and sets up respectively the fixed cover at gangbar main part both ends, fixed cover with gangbar main part fixed connection, fixed cover with fixing base rotatable coupling, the wind spring cover is established fixed sheathe in, the inner circle end of wind spring with fixed cover is connected.

Further, the fixing sleeve is provided with a flat structure, and the inner ring end of the coil spring is hooked on the flat structure; and a hooking structure is arranged at the position of the fixed seat corresponding to the coil spring, and the outer ring end of the coil spring is hooked with the hooking structure.

Furthermore, the linkage rod driving device further comprises a driving component, the driving component is arranged on the fixed seat, and the driving component can drive the toothed plate to rotate by taking the rotating shaft of the linkage rod as a shaft, so that the linkage rod is driven to rotate.

Furthermore, an interval is formed between the driving part and the fixed seat, the driving rotating shaft of the driving part penetrates through the interval, the toothed plate is located in the interval, and the driving rotating shaft drives the toothed plate to rotate.

Furthermore, an arc waist hole is formed in the toothed plate, a plurality of spacers are arranged in the intervals, and at least one spacer is located in the arc waist hole.

Furthermore, a limiting structure is arranged at the position, corresponding to the toothed plate, of the fixing seat, and the limiting structure is located on one side of the toothed plate in the rotating direction.

Furthermore, the gangbar with the junction of fixing base, and/or the cushion frame with the junction of fixing base, and/or the second connecting rod with the junction of first connecting rod, and/or the second connecting rod with the junction of cushion frame is provided with wear-resisting parts.

Compared with the prior art, the seat base framework of the application has at least one or more of the following beneficial effects:

according to the seat base framework, the up-and-down adjustment of the cushion framework is realized by adopting fewer transmission parts, so that the manufacturing cost can be reduced, the damage probability can be reduced, and the stability of the base framework can be improved; a pre-tightening component is arranged between the linkage rod and the fixed seat in the base framework, so that an additional force is maintained between the linkage rod and the corresponding support part, the linkage rod is more stable in the adjusting process, the seat is adjusted downwards to save more labor, abnormal sound generated by shaking caused by a gap between moving parts in the unmanned sitting process of the seat can be improved, and the comfort of passengers in the sitting process is improved; the distance piece between the driving part and the fixed seat penetrates through the toothed plate, so that the toothed plate is more stable and firm in rotation; the wear-resistant parts can be arranged at the rotating connection positions of all the parts, so that the smooth rotation and the reduction of the rotating wear among all the parts of the whole seat framework can be ensured, and the service life is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of a seat frame provided in an embodiment of the present application;

fig. 2 and 3 are schematic structural views of a seat back frame provided in an embodiment of the present application;

FIG. 4 is a schematic structural view of a seat shoulder adjustment mechanism provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a seat back mechanism of a built-in seat belt provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a base frame according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a seat base adjustment mechanism provided in an embodiment of the present application;

FIG. 8 is a schematic partially exploded view of a seat base adjustment mechanism provided in accordance with an embodiment of the present application;

FIG. 9 is a partial cross-sectional view of a seat base adjustment mechanism provided in an embodiment of the present application at the connection of a linkage bar and a fixed base;

FIG. 10 is a schematic view of the installation position of the pretensioning member with the hooking structure and the fixing sleeve according to the embodiment of the present application;

fig. 11 is a partially enlarged schematic view of a seat base adjustment mechanism provided in an embodiment of the present application in an actuated position.

Wherein, 1-backrest framework, 11-upper bracket, 111-connecting plate, 112-upper side plate, 1121-first arc waist hole, 1122-hooking structure, 113-connecting rod, 12-lower bracket, 121-supporting rod, 122-lower side plate, 1221-lower side plate, 12211-connecting structure, 1222-limit pin, 1223-sealing vertical plate, 13-safety belt outlet structure, 14-safety belt fixing bracket, 15-safety belt restraining groove, 16-adjusting part, 161-driving device, 162-driving rod, 17-rebound part, 18-angle adjusting part, 2-base framework, 21-cushion frame, 22-adjusting mechanism, 221-fixing seat, 2211-first seat part, 2212-second seat part and 2213-vertical plate structure, 2214-limiting structure, 2215-hooking structure, 222-linkage rod, 2221-linkage rod main body, 2222-fixing sleeve, 223-first connecting rod, 224-second connecting rod, 225-toothed plate, 2251-second arc-shaped waist hole, 23-pre-tightening part, 24-driving part, 241-driving rotating shaft, 242-spacing part, 3-translation part, 4-rotation part and 5-wear-resisting part.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined purpose of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

In the present embodiment, as shown in fig. 1, the seat frame mainly includes a backrest frame 1 and a base frame 2, and for explaining the technical solution more clearly, a spatial coordinate system as shown in fig. 1 is established, wherein a width direction of the base frame 2 is consistent with an x-axis direction, a length direction is consistent with a y-axis direction, and a height direction is consistent with a z-axis direction.

The backrest framework 1 comprises an upper support 11 and a lower support 12, the upper support 11 is rotatably connected with the lower support 12, and the lower support 12 is located on one side of the upper support 11 in the width direction, namely on one side where the base framework 2 is arranged. The lower support 12 is rotatably connected with the base frame 2. The upper bracket 11 includes a connecting plate 111 and two upper side plates 112, as shown in fig. 2 to 4. The two upper side plates 112 are spaced apart from each other in the y-axis direction, which is the longitudinal direction of the upper frame 11. Two ends of the connecting plate 111 are respectively connected with the two upper side plates 112. Preferably, the length direction of the connection plate 111 is aligned with the y-axis direction, and is shifted to the positive x-axis direction of the connection plate 111.

As shown in fig. 2 and 3, the lower bracket 12 includes a support bar 121 and two lower side plates 122. The two lower side plates 122 are arranged at intervals along the length direction of the upper bracket 11, i.e. the y-axis direction, the lower side plates 122 correspond to the upper side plates 112 one by one, and the lower side plates 122 are rotatably connected with the corresponding upper side plates 112. Two ends of the supporting rod 121 are respectively connected to the two lower side plates 122. Preferably, the length direction of the supporting rod 121 is identical to the y-axis direction, and the middle portion of the supporting rod 121 is bent toward the combined direction of the positive x-axis direction and the negative z-axis direction.

Preferably, the lower side plate 122 includes a lower side plate 1221 and a sealing vertical plate 1223. The vertical sealing plate 1223 may be a hollow flat tube structure, or a thicker plate structure. The lower side plate 122 is designed in two parts, and the material, size and the like of the vertical sealing plate 1223 can be designed without affecting the rotation adjustment between the upper bracket 11 and the lower bracket 12, so as to achieve the purpose of improving the strength of the seat or controlling the cost. In the later use process, if the lower side plate 122 is damaged, only the damaged part can be replaced without replacing the whole lower side plate 122, so that the maintenance cost is saved.

The vertical sealing plate 1223 is fixedly connected with the lower side plate 1221. Preferably, one end of the lower edge plate 1221 overlaps the vertical sealing plate 1223, and the lower edge plate 1221 is located on the outer side of the vertical sealing plate 1223 in the y-axis direction, as shown in fig. 2 or fig. 3. The end of the supporting rod 121 sequentially passes through the vertical sealing plate 1223 and the lower side plate 1221 and is fixed. It should be noted that the fixing position of the supporting rod 121 is only a preferred embodiment, in specific implementation, the end of the supporting rod 121 may also only pass through the vertical sealing plate 1223, or only pass through the lower edge plate 1221, and the supporting rod 121 may be fixed to the vertical sealing plate 1223, or fixed to the lower edge plate 1221, or fixed to both. The fixing manner can be various, for example, by gluing, welding, etc., or by designing a corresponding fastener to connect the supporting rod 121 with the vertical sealing plate 1223 or the lower plate 1221, etc.

The lower edge plate 1221 is rotatably connected to the upper edge plate 112. Preferably, the other end of the lower edge plate 1221 overlaps the upper edge plate 112, and the lower edge plate 1221 is located on a side of the corresponding upper edge plate 112 away from the other upper edge plate 112, that is, the lower edge plate 1221 is located on the outer side of the y-axis direction of the upper edge plate 112, as shown in fig. 4. The lower edge plate 1221 is hinged with the upper edge plate 112, i.e. the rotatable connection is realized through a rotating shaft. The rotating shaft is arranged close to one end of the lower side plate 1221 or the upper side plate 112 in the negative x-axis direction. Lower limb 1221 with be provided with rebound component 17 between the sideboard 112, make the upper end of upper bracket 11 is kept away from promptly when the one end of lower carriage 12 rotates towards the negative direction of x, rebound component 17 can lower limb 1221 with form a resilience force between the sideboard 112, can guarantee on the one hand stability when upper bracket 11 rotates, on the other hand can also be in more smoothly and laborsaving during the gyration of upper bracket 11. Preferably, the resilient member 17 is a torsion spring. One end of the rotating shaft extends towards the inside of the backrest framework 1. The torsion spring is sleeved on the rotating shaft, so that the torsion spring is located on one side of the upper edge plate 112, which is far away from the lower edge plate 1221. A first arc-shaped waist hole 1121 is formed in the position, close to the rotating shaft, of the upper edge plate 112, and the first arc-shaped waist hole 1121 is preferably located on one side of the rotating shaft in the positive direction of the x axis, and the position, which can be shifted up and down, is not limited. The first arc-shaped waist hole 1121 takes the center of the rotating shaft as the center of a circle. A position of the inner side of the lower plate 1221 corresponding to the first arc-shaped waist hole 1121 is provided with a stopper pin 1222, one end of the stopper pin 1222 extends toward the upper plate 112, i.e., extends toward the inside of the backrest frame 1, and the stopper pin 1222 is located in the first arc-shaped waist hole 1121. It should be noted that the limit pin 1222 described in this application may be a separate piece, or may be an integrally formed part on the lower plate 1221. The side of the upper board 112 away from the lower board 1221 is provided with a hooking structure 1122. Preferably, the hooking structure 1122 is a plate-shaped structure integrally formed with the lower plate 1221, and is located on a direction side of the rotating shaft corresponding to the vertical sealing plate 1223. A U-shaped notch is formed in the hooking structure 1122, and opens toward the sealing riser 1223. Two free ends of the torsion spring are both located between the limit pin 1222 and the hooking structure 1122, wherein one end of the torsion spring is hooked with a U-shaped notch on the hooking structure 1122, so as to be connected with the upper side plate 112; the other end is hooked with the limit pin 1222 as shown in fig. 4, but it should be noted that the torsion spring is shown in a natural state, and one end is in a free state and is not hooked with the limit pin 1222, but in a practical implementation, the two are actually hooked.

The back frame 1 further comprises at least one adjustment member 16. The upper bracket 11, the lower panel 1221 and the adjusting component 16 constitute the seat frame of the embodimentShoulder adjusting mechanismAs shown in fig. 4. The adjusting members 16 are preferably two, one for each of the upper side plates. The adjustment member 16 is provided on the upper bracket 11. Specifically, the adjusting component 16 includes a driving device 161 and a driving rod 162, the driving device 161 is disposed on the connecting plate 111, a length direction of the driving rod 162 is consistent with a width direction of the upper bracket 11, one end of the driving rod 162 in the length direction is rotatably connected to the corresponding lower plate 1221, and the driving device 161 can drive the driving rod 162 along the length direction relatively to the corresponding lower plate 1221The driving device 161 moves to drive the upper bracket 11 to rotate relative to the lower bracket 12 or the lower edge plate 1221. The adjusting component 16 preferably adopts a lead screw motor, the driving rod 162 is a lead screw, and the lead screw motor is an existing component, so the detailed structure thereof is not described herein. The connection between the driving rod 162 and the lower edge plate 1221 is preferably implemented by arranging a plate-shaped connecting structure 12211 at a position corresponding to the driving rod, on the opposite side of one lower edge plate 1221 and the other lower edge plate 1221, i.e., on the inner side of the lower edge plate 1221, wherein the connecting structure 12211 is parallel to the lower edge plate 1221, and the driving rod 162 and the connecting structure 12211 are rotatably connected by a connecting member such as a bolt. Since one end of the driving rod 162 is connected to the lower edge plate 1221, when the driving device 161 operates and moves relative to the driving rod 162, the driving device 161 moves along the length direction of the driving rod 162. For example, when the driving device 161 moves along the driving rod 162 in a direction away from the lower side plate 1221, the driving device drives the upper end of the upper bracket 11 to rotate in the negative x direction, and conversely, the driving device drives the upper bracket 11 to rotate, so as to adjust the forward tilting amplitude of the shoulder of the seat back. At the same time, two adjusting elements 16, which are operated synchronously, are preferably used, so that the upper carriage 11 is more stable during the rotational adjustment.

In order to ensure the stability of the upper bracket 11, a connecting rod 113 is further disposed at one end of the upper bracket 11 away from the lower bracket 12, and two ends of the connecting rod 113 are respectively fixedly connected to the two upper side plates 112.

The backrest frame 1 further includes a belt fixing bracket 14 and a belt restraining groove 15. The upper bracket 11, the lower bracket 12, the safety belt fixing bracket 14 and the safety belt restraining groove 15 form the seat framework of the embodimentBuilt-in seat backrest machine with safety belt Structure of the organizationAs shown in fig. 5. The belt fixing bracket 14 is disposed on the lower bracket 12, the belt restraining groove 15 is disposed on the upper bracket 11, and one end of the belt restraining groove 15 extends to the belt fixing bracket 14.

The belt fixing bracket 14 is disposed on the support bar 121. As shown in fig. 3, a support structure is disposed at a position where the middle bent portion of the support rod 121 is close to the left lower side plate 122 or the vertical sealing plate 1223, and the fixed support extends toward the upper bracket 11. The belt anchor bracket 14 is fixedly mounted to the mounting structure such that the belt anchor bracket 14 is located between the support bar 121 and the attachment plate 111. The seat belt is disposed in the seat belt fixing bracket 14, and since the seat belt fixing bracket 14 is an existing component, it will not be described in detail herein. The safety belt restriction groove 15 is arranged on one side of the positive x direction on the connecting plate 111, the safety belt restriction groove 15 is arranged corresponding to the safety belt fixing support 14, and one end of the safety belt restriction groove 15 extends to the safety belt fixing support 14. The belt restraint slot 15 is preferably designed to be inclined such that the end of the belt restraint slot 15 remote from the belt fixing bracket 14 is inclined toward the corresponding upper side plate 112. Preferably, the belt restraining groove 15 has a U-shaped cross section in the radial direction, and the open side is away from the connecting plate 111, and the belt can slide in the belt restraining groove 15. Further, both ends of the belt restraining groove 15 are preferably bent toward the inside of the back frame 1, so that the pair of belt restraining grooves 15 can be prevented from being damaged when sliding in the grooves thereof. Furthermore, a safety belt outlet structure 13 is further arranged at one end of the upper support 11 far away from the lower support 12, the safety belt outlet structure 13 is located on one side of the positive direction of the x axis of the upper support 11 and corresponds to the safety belt restraining groove 15, and the other end of the safety belt restraining groove 15 extends to the safety belt outlet structure 13. Preferably, the seat belt exit structure 13 is disposed corresponding to the connecting rod 113, and the other end of the seat belt restraint slot 15 bypasses the connecting rod 113 from a side away from the seat belt exit structure 13, so that in specific implementation, the seat belt located in the seat belt fixing bracket 14 can bypass the connecting rod 113 through the seat belt restraint slot 15 and then be placed outside the seat back for being pulled by the occupant, thereby ensuring the installation stability of the seat belt restraint slot 15, improving the strength of the seat back, and further enhancing the safety of the seat belt. The safety belt restraining groove 15 preferably adopts an inclined design, so that the safety belt restraining groove can be well adapted to the inclined state of the safety belt in use, and the safety belt can be effectively prevented from being abraded to a certain extent when the safety belt is pulled. The safety belt fixing support 14 is arranged in the middle of the seat back, so that on one hand, the safety belt fixing support 14 is prevented from being arranged in the seat base to occupy the space of the seat base, and the space in the seat back is effectively utilized; on the other hand, the length of the safety belt restraining groove 15 can be reduced, the manufacturing cost is reduced, meanwhile, the abrasion of the safety belt restraining groove 15 on the safety belt can be reduced to a certain degree, and the service life of the safety belt is prolonged. Secondly, through the structural design, the safety belt can be arranged in the seat back and cannot be arranged outside the back of the seat back, and the seat is more attractive and tidy.

The above-mentionedBase frame2 comprises a cushion frame 21 and an adjusting mechanism 22, wherein the cushion frame 21 is positioned above the adjusting mechanism 22, as shown in fig. 6. One end of the backrest frame 1, namely the lower bracket 12, is rotatably connected with one end of the cushion frame 21, and the other end of the backrest frame 1 extends in a direction away from the adjusting mechanism 22. Specifically, one end of the lower side plate 122, which is far away from the upper side plate 112, is connected to the cushion frame 21 through the angle adjusting member 18, so that the backrest frame 1 can rotate relative to the cushion frame 21. The angle adjusting component 18 is an angle adjuster or a corner device, which is a commonly used structure for adjusting the seat back and the seat base, and therefore, the details thereof are not described herein. It should be noted that, in order to increase the firmness of the seat back, the lower side plate 122 of the seat belt side may be provided with one angle adjusting component 18 on each side thereof, as shown in fig. 2, which may effectively increase the firmness of the connection between the seat back and the base, and improve the safety and stability of the seat belt.

The above-mentionedAdjusting mechanism22 includes a mounting 221, a linkage assembly and a drive member 24, as shown in fig. 7. The fixing seat 221 and the cushion frame 21 are rotatably connected with one end of the backrest frame 1. The fixing seat 221 includes a first seat portion 2211 and a second seat portionTwo seat portions 2212, the first seat portion 2211 and the second seat portion 2212 are provided at intervals in the y-axis direction, and the longitudinal direction of the first seat portion 2211 and the second seat portion 2212 coincides with the x-axis direction. Preferably, the first support 2211 and the second support are identical in structure, and are both of a folded plate structure with an L-shaped radial cross section, and include a vertical plate and a fixing plate, and the cushion frame 21 is rotatably connected to the vertical plate. Two ends of the linkage rod 222 are rotatably connected to the respective vertical plates of the first seat portion 2211 and the second seat portion 2212. Fig. 7 shows a detachable fixing seat 221 adaptively, that is, the first seat portion 2211 and the second seat portion 2212 are independent components, and in practical implementation, the first seat portion 2211 and the second seat portion 2212 may also be two parts of an integral fixing seat 221, for example, two vertical plates are spaced apart from each other on a whole fixing seat.

The linkage component comprises a linkage rod 222, a connecting rod group and a toothed plate 25 fixedly sleeved on the linkage rod 222. Two ends of the linkage rod 222 are respectively rotatably connected with the vertical plates corresponding to the supporting parts, a pre-tightening part 23 is arranged between the linkage rod 222 and the vertical plate corresponding to the supporting part, and the linkage rod 222 and the other end of the cushion frame 21 are linked through the connecting rod group. As shown in fig. 7 and 8, the linkage includes a first connecting rod 223 and a second connecting rod 224, the first connecting rod 223 is sleeved on the linkage rod 222, the second connecting rod 224 is respectively rotatably connected to the first connecting rod 223 and the cushion frame 21, and one end of the cushion frame 21 is rotatably connected to the fixing seat 221. Preferably, the linkage rod 222 includes a linkage rod main body 2221 and fixing sleeves 2222 respectively disposed at both ends of the linkage rod main body 2221. One end of the fixed sleeve 2222 is fixedly connected with the linkage rod main body 2221. The other end of the fixing sleeve 2222 is rotatably connected to the vertical plate of the corresponding supporting portion, as shown in fig. 9. The pre-tightening part 23 preferably adopts coil springs, and each of the fixing sleeves 2222 is sleeved with one of the coil springs. The middle portion of the fixing sleeve 2222 is designed to be a flat structure, the coil spring is sleeved on the middle portion of the fixing sleeve 2222, the inner ring end of the coil spring is hooked on the flat structure to be connected with the fixing sleeve 2222, the outer ring end of the coil spring is connected with the fixing base 221, for example, a hooking structure 2215 is arranged on a vertical plate corresponding to the support portion and corresponding to the coil spring, so that the outer ring end of the coil spring is hooked with the hooking structure 2215, as shown in fig. 10, but it should be noted that fig. 1 or 6 show that the coil spring is in a natural state, one end is in a free state and is not hooked with the hooking structure 2215, and in specific implementation, the two are actually hooked, and the outer ring end of the coil spring is in a stretched state, so that the coil spring can maintain an additional force between the linkage rod 222 and the corresponding support portion, make it more stable at the in-process of regulation, make laborsaving more at the lower chair of transferring, but also can improve the seat and take the strange sound that the rocking production that the in-process leads to by the clearance between the moving part unmanned, improve the travelling comfort of passenger's in-process. The hooking structure 2215 may be a separate fixing pin or a column-shaped structure integrally formed with the holder or the fixing base 221. It should be noted that, in specific implementation, the installation position of the coil spring is not limited to this, for example, the linkage rod 222 is a single rod-shaped structure, and the coil spring is directly sleeved on the linkage rod 222, and only a shape or a structure for hooking the coil spring needs to be arranged at a position corresponding to the linkage rod 222.

The first connecting rod 223 is fixedly sleeved on the corresponding fixed sleeve 2222. It should be noted that the fixing between the first link 223 and the fixing sleeve 2222 may be implemented by gluing, welding, fixing, or the like, or the fixing sleeve 2222 may be structurally designed so that the cross-sectional shape of the joint between the first link 223 and the fixing sleeve has a certain shape, such as a quadrangle, or the first link 223 may be driven to rotate when the linkage rod 222 rotates. Similarly, when the linkage rod 222 is a single rod-shaped structure, the first connecting rod 223 can also be directly sleeved on the linkage rod 222.

The driving component 24 is disposed on the fixing seat 221, and is configured to drive the tooth plate 25 to rotate around the rotating shaft of the linkage rod 222, so as to drive the linkage rod 222 to rotate. As shown in fig. 11, the driving member 24 is preferably fixed to the first holder 2211 by using a rotating motor. A vertical plate structure 2213 is disposed on one side of the first seat portion 2211 facing the second seat portion 2212. The driving member 24 is disposed on one side of the vertical plate structure 2213, and the driving member 24 is spaced from the vertical plate structure 2213. The driving rotating shaft 241 of the driving component 24 penetrates through the gap, the toothed plate 25 is located in the gap, and the driving rotating shaft 241 is in external meshing transmission connection with the toothed plate 25, so that when the driving component 24 works, the driving rotating shaft 241 rotates to drive the toothed plate 25 to rotate, and then the linkage rod 222 is driven to rotate.

A plurality of spacers 242 are disposed in the gap, and are mainly used for spacing the driving component 24 from the vertical plate structure 2213. The spacer 242 is preferably a hollow tubular structure. Preferably, when the driving member 24 is fixed to the vertical plate 2213, a fastener such as a bolt for fixing may be inserted through the spacer 242. As shown in fig. 11, three spacers 242 are schematically illustrated, one of the spacers is disposed near the linkage rod 222, and a second arc-shaped waist hole 2251 is disposed at a position of the tooth plate 25 corresponding to the spacer 242, and the spacer 242 passes through and is located in the second arc-shaped waist hole 2251. The spacer 242 passes through the tooth plate 25, making the tooth plate 25 more stable and secure in rotation. Meanwhile, the second arc-shaped waist hole 2251 can also function as a limit, for example, as shown in fig. 7, when the tooth plate 25 rotates upward to make the spacer 242 collide with the lower inner wall of the second arc-shaped waist hole 2251, one end of the cushion frame 21 is at the lowest position, and when the tooth plate 25 rotates downward to make the spacer 242 collide with the upper inner wall of the second arc-shaped waist hole 2251, one end of the cushion frame 21 is at the highest position. In practical implementation, the second arc-shaped waist hole 2251 with different lengths can be selected to meet the requirements of different adjustment ranges of the cushion frame 21. In addition, preferably, a limiting structure 2214, such as a limiting tube, may be further disposed at a position of the fixing seat 221 corresponding to the tooth plate 25. And the limiting structure 2214 is located at one side of the rotation direction of the tooth plate 25, for example, the limiting structure 2214 is arranged at one side of the fixing plate of the first seat portion 2211 facing the linkage rod 222, and the length direction of the limiting structure 2214 is consistent with the length direction of the linkage rod 222, so as to limit the tooth plate 25.

In a further embodiment, in order to ensure smooth rotation between the components of the entire seat frame and reduce rotational wear and increase the service life, a wear-resistant component 5 such as a wear-resistant sleeve may be optionally disposed at the connection between the linkage rod 222 and the fixing seat 221, or the connection between the cushion frame 21 and the fixing seat 221, or the connection between the second link 224 and the first link 223, or the connection between the second link 224 and the cushion frame 21, as shown in fig. 8.

In further embodiments, the seat frame may also be adjusted translationally, or may also be adjusted rotationally. A translation component 3, such as a slide rail, is also arranged at the bottom of the seat frame. The fixing seat 221 is disposed on the translation component 3, and the fixing seat 221 can be moved on the translation component 3 by an adjustment manner such as manual operation or motor driving. Since the adjustment is common, it is not described herein again.

Still alternatively, a rotating component 4, such as an electric rotating disc, is further disposed at the bottom of the seat frame, the rotating component 4 is disposed on the translating component 3, and the fixing seat 221 is disposed on the rotating component 4, as shown in fig. 1 or fig. 6. Therefore, the chair framework can be adjusted in a translation mode and can also be adjusted in a rotation mode of 360 degrees, so that a user can have more adjustment options in the using process, and the applicability is stronger.

According to the seat base framework, the up-and-down adjustment of the cushion framework is realized by adopting fewer transmission parts, so that the manufacturing cost can be reduced, the damage probability can be reduced, and the stability of the base framework can be improved; a pre-tightening component is arranged between the linkage rod and the fixed seat in the base framework, so that an additional force is maintained between the linkage rod and the corresponding support part, the linkage rod is more stable in the adjusting process, the seat is adjusted downwards to save more labor, abnormal sound generated by shaking caused by a gap between moving parts in the unmanned sitting process of the seat can be improved, and the comfort of passengers in the sitting process is improved; the spacer between the driving part and the fixed seat penetrates through the toothed plate, so that the toothed plate is more stable and firm in rotation; the rotation junction of each part can set up wear-resisting part, can guarantee to rotate smoothly and reduce the rotational wear between each part of whole seat skeleton, increases life.

In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, which may include other elements not expressly listed in addition to those listed.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. A seat base frame is characterized by comprising a cushion frame (21) and an adjusting mechanism, the cushion frame (21) is positioned above the adjusting mechanism (22), the adjusting mechanism (22) comprises a fixed seat (221) and a linkage component, the linkage component comprises a linkage rod (222), a connecting rod group and a toothed plate (225) sleeved on the linkage rod (222), two ends of the linkage rod (222) are respectively connected with the fixed seat (221) in a rotatable way, a pre-tightening component (23) is arranged between the linkage rod (222) and the fixed seat (221), the linkage comprises a first connecting rod (223) and a second connecting rod (224), the first connecting rod (223) is sleeved on the linkage rod (222), the second connecting rod (224) is respectively and rotatably connected with the first connecting rod (223) and the cushion frame (21), one end of the cushion frame (21) is rotatably connected with the fixed seat (221).

2. The seat base frame as claimed in claim 1, wherein the pre-tightening component (23) is a coil spring, the coil spring is sleeved on the linkage rod (222), an outer ring end of the coil spring is connected with the fixing seat (221), and an inner ring end of the coil spring is connected with the linkage rod (222).

3. The seat base frame as claimed in claim 2, wherein the linkage rod (222) comprises a linkage rod main body (2221) and fixing sleeves (2222) respectively arranged at two ends of the linkage rod main body (2221), the fixing sleeves (2222) are fixedly connected with the linkage rod main body (2221), the fixing sleeves (2222) are rotatably connected with the fixing base (221), the coil springs are sleeved on the fixing sleeves (2222), and inner ring ends of the coil springs are connected with the fixing sleeves (2222).

4. The seat base frame as claimed in claim 3, wherein said fixing sleeve (2222) has a flat structure thereon, and an inner coil end of said coil spring is hooked on said flat structure;

a hooking structure (2215) is arranged at the position, corresponding to the coil spring, of the fixed seat (221), and the outer ring end of the coil spring is hooked with the hooking structure (2215).

5. The seat base frame according to claim 1, further comprising a driving component (24), wherein the driving component (24) is disposed on the fixing seat (221), and the driving component (24) can drive the toothed plate (225) to rotate around a rotating shaft of the linkage rod (222), so as to drive the linkage rod (222) to rotate.

6. The seat base frame according to claim 5, wherein a space is provided between the driving member (24) and the fixing seat (221), a driving rotating shaft of the driving member (24) passes through the space, the tooth plate (225) is located in the space, and the driving rotating shaft drives the tooth plate (225) to rotate.

7. The seat base frame according to claim 6, wherein the toothed plate (225) is provided with an arc-shaped waist hole, the gap is provided with a plurality of spacers (242), and at least one spacer (242) is located in the arc-shaped waist hole.

8. The seat base frame according to claim 6, wherein a position of the fixing seat (221) corresponding to the toothed plate (225) is provided with a limiting structure (2214), and the limiting structure (2214) is located at one side of the rotation direction of the toothed plate (225).

9. The seat base frame as claimed in claim 1, characterized in that a wear part (5) is provided at the connection of the linkage bar (222) and the fixing seat (221), and/or at the connection of the cushion frame (21) and the fixing seat (221), and/or at the connection of the second connecting rod (224) and the first connecting rod (223), and/or at the connection of the second connecting rod (224) and the cushion frame (21).

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