CN217048359U - Seat base adjusting mechanism - Google Patents

Abstract

The utility model discloses a seat base adjustment mechanism, it includes fixing base and linkage subassembly, the linkage subassembly includes that gangbar, linkage and cover establish pinion rack on the gangbar, the both ends of gangbar respectively with fixing base rotatable coupling, the linkage includes first connecting rod and second connecting rod, first connecting rod cover is established on the gangbar, the second connecting rod with first connecting rod rotatable coupling. This application simple structure adopts less drive disk assembly to realize the upper and lower regulation of cushion skeleton, can reduce manufacturing cost, reduces and damages the probability to and improve the stability of base skeleton.

Description

Seat base adjustment mechanism

Technical Field

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

Background

The car seat is the necessary configuration of automotive interior, also be the most direct embodiment whether car owner perception vehicle is comfortable, the main factor that influences the seat comfort still is the ergonomic design of seat, ergonomic also is the relation that people, car, environment are direct of main research, through promoting more regulation directions of seat, and bigger control range, realize that the user can oneself adjust to considering the most comfortable gesture by oneself, promote through visible function, can give the more direct sense organ 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, and vibrations are generated during the operation of the automobile, and the more parts, the more fitting clearance may exist, and the more unstable the seat is.

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 a seat base adjustment mechanism adopts less drive disk assembly to realize the upper and lower regulation of cushion skeleton, can reduce manufacturing cost, reduces and damages the probability to and improve the stability of base skeleton.

For realizing the utility model purpose, the utility model provides a seat base adjustment mechanism, it includes fixing base and linkage subassembly, the linkage subassembly includes that gangbar, linkage and cover are established pinion rack on the gangbar, the both ends of gangbar respectively with fixing base rotatable coupling, the linkage includes first connecting rod and second connecting rod, first connecting rod cover is established on the gangbar, the second connecting rod with first connecting rod rotatable coupling.

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, the fixing seat comprises a first support part and a second support part, the first support part and the second support part are arranged at intervals, and two ends of the linkage rod are rotatably connected with the first support part and the second support part respectively.

Furthermore, a vertical plate structure is arranged on one side, facing the second support part, of the first support part, the driving part is arranged on one side of the vertical plate structure, a gap is formed between the driving part and the vertical plate structure, a driving rotating shaft of the driving part penetrates through the gap, the toothed plate is located in the gap, and the driving rotating shaft drives the toothed plate to rotate.

Furthermore, the driving rotating shaft is in external meshing transmission connection with the toothed plate.

Further, be provided with arc waist hole on the pinion rack, be provided with a plurality of spacer in the interval, at least one spacer is located the arc waist is downthehole.

Furthermore, the position of the fixed seat corresponding to the toothed plate is provided with a limiting structure, and the limiting structure is positioned on one side of the toothed plate in the rotating direction.

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 first support portion or second support portion rotatable coupling.

Furthermore, the first connecting rod is fixedly sleeved on the fixing sleeve.

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

the seat base adjusting mechanism is simple in structure, the up-and-down adjustment of the seat cushion framework is realized by adopting fewer transmission parts, the manufacturing cost can be reduced, the damage probability can be reduced, and the stability of the base framework can be improved; the distance piece between the driving component and the fixed seat penetrates through the toothed plate, so that the toothed plate is more stable and firm in rotation.

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 view of a seat back mechanism of a seat back of a seat belt incorporating the subject 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 a connection of a linkage rod and a fixing 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 base, 2211-first supporting base part, 2212-second supporting base part, 2213-vertical plate structure, 2214-limit structure, 2215-hook connection structure, 222-linkage rod, 2221-linkage rod main body, 2222-fixed 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-spacer, 3-translation part, 4-rotation part and 5-wear-resistant part.

Detailed Description

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

The embodiment provides a seat frame, as shown in fig. 1, which mainly includes a backrest frame 1 and a base frame 2, and for more clearly explaining the technical solution, 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 connecting plate 111 is aligned with the y-axis direction, and is shifted to the positive x-axis direction of the connecting 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 may be 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 mode can be various, for example, by gluing, welding, etc., and the supporting rod 121 and the vertical sealing plate 1223 or the lower side plate 1221, etc. can also be fixed by designing a corresponding clamping piece.

The lower plate 1221 is rotatably coupled to the upper 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 to the upper edge plate 112, that is, the lower edge plate and the upper edge plate are rotatably connected 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 panel 1221 with be provided with resilience part 17 between upper panel 112, make the upper bracket 11 is kept away from promptly when the one end of lower carriage 12 rotates towards the negative direction of x, resilience part 17 can be in lower panel 1221 with form a resilience force between upper panel 112, on the one hand can guarantee stability when upper bracket 11 rotates, on the other hand can also be in it is more smooth and laborsaving when upper bracket 11 revolves. 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 upper plate 112 at a position close to the rotating shaft, 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 where the upper side and the lower side can be shifted is not limited. The first arc-shaped waist hole 1121 takes the center of the rotating shaft as the center of a circle. A limit pin 1222 is disposed at a position corresponding to the first arc-shaped waist hole 1121 on the inner side of the lower edge plate 1221, one end of the limit pin 1222 extends toward the upper edge plate 112, i.e., extends toward the inside of the backrest frame 1, and the limit 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 of 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 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 that the torsion spring is 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 form a seat frame of the embodimentShoulder adjusting mechanismAs shown in fig. 4. Preferably, two adjusting members 16 are used, and each of the upper side plates corresponds to each of the adjusting membersOne. The adjusting member 16 is provided on the upper bracket 11. Specifically, the adjusting part 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 to move along the length direction relative to the driving device 161, so as to drive the upper bracket 11 to rotate relative to the lower bracket 12 or the lower plate 1221. The adjusting component 16 preferably employs 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, that is, 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 the driving rod 162 moves relatively, 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 upper end of the upper bracket 11 is driven to rotate in the negative x direction, and conversely, the upper bracket 11 is driven to rotate, so as to adjust the forward tilting amplitude of the shoulder of the seat back. At the same time, two synchronously operating adjusting elements 16 are preferably used, which make the upper carriage 11 more stable during 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 comprises a safety belt fixing bracket 14 and a safety belt restraintA slot 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 fixing bracket 14 is fixedly mounted on the seat structure such that the belt fixing bracket 14 is located between the support bar 121 and the connection 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. Further, a safety belt outlet structure 13 is further arranged at one end, away from the lower support 12, of the upper support 11, 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 restraining slot 15 bypasses the connecting rod 113 from a side away from the seat belt exit structure 13, so that in practical implementation, the seat belt located in the seat belt fixing bracket 14 can bypass the connecting rod 113 through the seat belt restraining slot 15 and then is placed outside the seat back for being pulled by the seat occupant, thereby ensuring the installation stability of the seat belt restraining 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 to the safety belt can be reduced to a certain extent, and the service life of the safety belt is prolonged. Secondly, through above-mentioned structural design, the safety belt can be built-in the backrest, and can not be arranged outside the back of the backrest, and is more pleasing to the eye and neat.

The above-mentionedBase frame 2Comprises a cushion frame 21 and an adjusting mechanism 22, wherein the cushion frame 21 is positioned above the adjusting mechanism 22, as shown in figure 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. However, in order to increase the firmness of the seat back, the lower plate 122 on the side of the seat belt may be provided on both sides thereofThe angle adjusting component 18 is arranged as shown in fig. 2, so that the connection firmness between the seat back and the base can be effectively increased, and the use safety and stability of the safety belt can be improved.

The above-mentionedAdjusting mechanism 22Including the mounting bracket 221, linkage assembly and 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 base 221 includes a first seat portion 2211 and a second seat portion 2212, the first seat portion 2211 and the second seat portion 2212 are disposed at intervals in the y-axis direction, and the length direction of the first seat portion 2211 and the second seat portion 2212 is aligned 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, 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 one another on a whole fixing plate.

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 is linked with the other end of the cushion frame 21 through the connecting rod group. As shown in fig. 7 and 8, the linkage set 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 connecting rod 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 fixing sleeve 2222 and the first connecting rod 223 has a certain shape, such as a quadrangle, or the first connecting rod 223 may be driven to rotate along with the rotation of the linkage rod 222. 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 a rotary motor and is fixed to the first holder 2211. A vertical plate structure 2213 is disposed on a 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 part 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 part 24 works, the driving rotating shaft 241 rotates to drive the toothed plate 25 to rotate, and further 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 on 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 during 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 holes 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. The position-limiting structure 2214 is located at one side of the rotation direction of the tooth plate 25, for example, the position-limiting structure 2214 is disposed at one side of the fixing plate of the first seat portion 2211 facing the linkage rod 222, and the length direction of the position-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 joint between the linkage rod 222 and the fixing seat 221, or the joint between the cushion frame 21 and the fixing seat 221, or the joint between the second connecting rod 224 and the first connecting rod 223, or the joint between the second connecting rod 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.

Alternatively, a rotating member 4, such as an electric rotating disc, is further disposed at the bottom of the seat frame, the rotating member 4 is disposed on the translating member 3, and the fixing seat 221 is disposed on the rotating member 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.

The seat base adjusting mechanism is simple in structure, the up-and-down adjustment of the seat cushion framework is realized by adopting fewer transmission parts, the manufacturing cost can be reduced, the damage probability can be reduced, and the stability of the base framework can be improved; the spacer between the driving component and the fixed seat penetrates through the toothed plate, so that the toothed plate is more stable and firm in rotation.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly 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 embodiments and features of the embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (9)

1. The utility model provides a seat base adjustment mechanism, its characterized in that, it includes fixing base (221) and linkage subassembly, the linkage subassembly includes gangbar (222), linkage and cover and establishes pinion rack (225) on gangbar (222), the both ends of gangbar (222) respectively with fixing base (221) rotatable coupling, the linkage includes first connecting rod (223) and second connecting rod (224), first connecting rod (223) cover is established on gangbar (222), second connecting rod (224) with first connecting rod (223) rotatable coupling.

2. The seat base adjusting mechanism 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.

3. The seat base adjusting mechanism according to claim 2, wherein the fixing seat (221) comprises a first seating portion (2211) and a second seating portion (2212), the first seating portion (2211) and the second seating portion (2212) are spaced apart, and two ends of the linkage rod (222) are rotatably connected to the first seating portion (2211) and the second seating portion (2212), respectively.

4. The seat base adjusting mechanism according to claim 3, wherein a side of the first seat portion (2211) facing the second seat portion (2212) is provided with a vertical plate structure (2213), the driving member (24) is provided at a side of the vertical plate structure (2213), a space is provided between the driving member (24) and the vertical plate structure (2213), the driving rotating shaft (241) of the driving member (24) passes through the space, the tooth plate (225) is located in the space, and the driving rotating shaft (241) rotationally drives the tooth plate (225) to rotate.

5. The seat base adjustment mechanism according to claim 4, wherein the drive shaft (241) is in external meshing transmission connection with the toothed plate (225).

6. The seat base adjustment mechanism according to claim 4, wherein the toothed plate (225) is provided with an arcuate waist aperture, the gap is provided with a plurality of spacers (242), and at least one spacer (242) is located within the arcuate waist aperture.

7. The seat base adjustment mechanism according to claim 1, wherein the fixing seat (221) is provided with a limit structure (2214) corresponding to the position of the toothed plate (225), and the limit structure (2214) is located at one side of the rotation direction of the toothed plate (225).

8. The seat base adjusting mechanism according to claim 3, 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), and the fixing sleeves (2222) are rotatably connected with the first support portion (2211) or the second support portion (2212).

9. The seat base adjustment mechanism of claim 8, wherein said first link (223) is fixedly sleeved on said fixed sleeve (2222).

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