CN217048376U - Seat back framework - Google Patents

Abstract

The utility model discloses a seat back skeleton, including upper bracket, lower carriage, safety belt fixed bolster, safety belt restraint groove and at least one adjusting part, rotatable coupling between upper bracket and the lower carriage, safety belt fixed bolster set up on the lower carriage, and safety belt restraint groove and adjusting part set up respectively on the upper bracket, and adjusting part can drive the upper bracket and rotate for the lower carriage. The safety belt is arranged in the seat backrest, so that the seat is more attractive and neat; the adjusting component is arranged on the upper support, so that a relatively abundant space is formed in the seat back for arranging the safety belt fixing seat, the safety belt fixing support can be 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 can be reduced, the abrasion of the safety belt restraining groove on the safety belt can be reduced to a certain extent while the manufacturing cost is reduced, and the service life of the safety belt is prolonged.

Description

Seat back framework

Technical Field

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

The conventional way of adjusting the shoulder of the seat is to arrange the adjusting component at the middle position of the seat back, which results in that there is not enough space for arranging other components such as the seat belt fixing bracket, for example, the seat belt fixing bracket is generally arranged in the seat base. Since the seat back is generally separate from the seat base, this results in the harness being required to extend from the outside of the seat back to the front of the seat when it is deployed, resulting in an aesthetically undesirable seat. Although some manufacturers on the market have built-in seat belt restraint slots in the seat back, the length of the restraint slots is relatively long and needs to be substantially the same as the length of the whole seat back, which increases the manufacturing cost on one hand and increases the wear on the seat belt on the other hand, thereby affecting the safety performance of the seat belt.

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

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a seat back frame, which enables the interior of the seat back to form a relatively spacious space for arranging other components such as a safety belt fixing seat and the like by arranging an adjusting component on an upper bracket, thereby improving the utilization rate of the interior space of the seat back frame; the safety belt fixing support is arranged in the seat back, the length of the safety belt restraining groove is reduced, the safety belt abrasion risk is reduced, the safety of the seat is improved, and the space utilization rate inside the seat back is improved.

In order to realize the utility model discloses the mesh, the utility model provides a backrest skeleton, it includes upper bracket, lower carriage, safety belt fixed bolster, safety belt restraint groove and at least one adjusting part, the upper bracket with rotatable coupling between the lower carriage, the safety belt fixed bolster sets up on the lower carriage, safety belt restraint groove with adjusting part sets up respectively on the upper bracket, adjusting part can drive the upper bracket for the lower carriage rotates.

Furthermore, the upper bracket comprises a connecting plate and two upper side plates, the two upper side plates are arranged along the length direction of the upper bracket at intervals, two ends of the connecting plate are respectively connected with the two upper side plates, the lower bracket comprises a supporting rod and two lower side plates, the lower side plates correspond to the upper side plates one to one, the lower side plates are rotatably connected with the corresponding upper side plates, and two ends of the supporting rod are respectively connected with the two lower side plates.

Furthermore, the lower side plate comprises a lower side plate and a sealing vertical plate, the lower side plate is rotatably connected with the upper side plate, the sealing vertical plate is connected with the lower side plate, and two ends of the supporting rod are respectively fixedly connected with the lower side plate and/or the sealing vertical plate.

Furthermore, the adjusting part comprises a driving device and a driving rod, the driving device is arranged on the connecting plate, the length direction of the driving rod is consistent with the width direction of the upper support, one end of the driving rod in the length direction is rotatably connected with the corresponding lower edge plate, and the driving device can drive the driving rod to move relative to the driving device in the length direction.

Furthermore, the lower side plate is located on one side, away from the other upper side plate, of the corresponding upper side plate, an arc waist hole is formed in the upper side plate, a limiting pin is arranged on the lower side plate, corresponding to the arc waist hole, one end of the limiting pin extends towards the direction of the upper side plate, and the limiting pin is located in the arc waist hole.

Furthermore, a springback component is arranged between the lower edge plate and the upper edge plate.

Further, the safety belt fixing support is arranged on the supporting rod, the safety belt restraining groove is arranged on the connecting plate, and one end of the safety belt restraining groove extends to the safety belt fixing support.

Further, the cross-sectional shape of the belt restraining groove in the radial direction is U-shaped, and the open side is away from the connecting plate.

Further, the safety belt fixing support is located between the supporting rod and the connecting plate.

Furthermore, the safety belt fixing support is close to one of the lower side plates, and angle adjusting components are respectively arranged on two sides of one end, far away from the upper side plate, of the lower side plate in the length direction of the lower support.

Compared with the prior art, the seat back frame of this application has following one or more beneficial effect:

the upper end of the backrest framework of the seat is provided with the upper support which can be adjusted in a rotating mode, and the appropriate comfortable angle of the shoulder position of the seat is adjusted by adjusting the rotating amplitude of the upper support; the upper bracket and the lower bracket are connected through a connecting part, and the upper bracket and the lower bracket are connected through a connecting part; the adjusting part for driving the upper support to rotate is arranged on the upper support, so that a relatively spacious space can be formed between the upper support and the lower support, and the adjusting part can be used for arranging a safety belt fixing seat, so that the utilization rate of the internal space of the seat backrest framework is higher, and the safety belt fixing seat does not occupy the internal space of the seat base; the safety belt fixing support is arranged in the middle of the seat back, so that the safety belt fixing support can be 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 can be reduced, the abrasion of the safety belt restraining groove on the safety belt can be reduced to a certain extent while the manufacturing cost is reduced, and the service life of the safety belt is prolonged; the safety belt is arranged in the seat back and cannot be arranged outside the back of the seat back, so that the seat is more attractive and tidy; the connection part of one side of the seat backrest framework, which is provided with the safety belt, and the base framework is provided with the two angle adjusting parts, so that the connection firmness between the seat backrest and the base can be effectively improved, and the use safety and stability of the safety belt are improved; the safety belt restraint slot adopts the slope design can be fine adaptation safety belt the tilt state when using, can effectively avoid causing wearing and tearing to the safety belt when pulling the safety belt to a certain extent.

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 according to 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 base, 2211-first supporting base part, 2212-second supporting base part, 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 intended purpose of the present invention, the following detailed description is given to the embodiments, structures, features and effects according to the present invention 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 bar 121 is aligned with the y-axis direction, and the middle portion of the supporting bar 121 is bent in a 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 outside 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 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 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 interior 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 side plate 112, which is far away from the lower side 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 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 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 edge plate 1221, and is located at 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. The adjusting members 16 are preferably two, one for each of the upper side plates. The adjusting 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 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, 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 are connected in such a way thatThe structure 12211 is rotatably coupled by a coupling 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 of the middle bent portion of the support rod 121 near 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 restraining groove 15 is arranged on one side of the positive x direction on the connecting plate 111, the safety belt restraining groove 15 is arranged corresponding to the safety belt fixing bracket 14, and one end of the safety belt restraining groove 15 extends to the safety belt fixing bracket 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. 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 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 describedBase 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 and one end of the cushion frame 21 are rotatably connected, 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 side plate 122 on one side of the seat belt may be provided with one recliner 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 mechanism 22Comprises a fixed seat 221, a linkage component and a driving part 24, as shown in figure 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 seating portion 2211 and a second seating portion 2212, the first seating portion 2211 and the second seating portion 2212 are spaced apart from each other in the y-axis direction, and the longitudinal direction of the first seating portion 2211 and the second seating 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, i.e. the first and second seat portions 2211 and 2212 are bothIn practical applications, the first and second seat portions 2211 and 2212 may also be two parts of a single fixing seat 221, such as two vertical plates spaced apart from each other on a single fixing plate.

The linkage assembly 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 adjusting, make laborsaving more at the lower chair of transferring, but also can improve the seat and take the abnormal sound that the rock production that the in-process leads to by the clearance between the moving part at 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 seat 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 part 24 is disposed on the fixing base 221, and is configured to drive the toothed plate 25 to rotate around a rotation 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 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 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 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 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 method 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.

The upper end of the backrest framework of the seat is provided with the upper support which can be adjusted in a rotating mode, and the appropriate comfortable angle of the shoulder position of the seat is adjusted by adjusting the rotating amplitude of the upper support; the upper bracket and the lower bracket are connected through a connecting part, and the upper bracket and the lower bracket are connected through a connecting part; the adjusting part for driving the upper support to rotate is arranged on the upper support, so that a relatively spacious space can be formed between the upper support and the lower support, and the adjusting part can be used for arranging a safety belt fixing seat, so that the utilization rate of the internal space of the seat backrest framework is higher, and the safety belt fixing seat does not occupy the internal space of the seat base; the safety belt fixing support is arranged in the middle of the seat back, so that the safety belt fixing support can be 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 can be reduced, the abrasion of the safety belt restraining groove on the safety belt can be reduced to a certain extent while the manufacturing cost is reduced, and the service life of the safety belt is prolonged; the safety belt is arranged in the seat back and cannot be arranged outside the back of the seat back, so that the seat is more attractive and tidy; the connection part of one side of the seat backrest framework, which is provided with the safety belt, and the base framework is provided with the two angle adjusting parts, so that the connection firmness between the seat backrest and the base can be effectively improved, and the use safety and stability of the safety belt are improved; the safety belt restraint slot adopts the inclined design, so that the safety belt can be well adapted to the inclined state of the safety belt when in use, and the abrasion to the safety belt when the safety belt is pulled can be effectively avoided to a certain extent.

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 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 (10)

1. A seat back frame is characterized by comprising an upper support (11), a lower support (12), a safety belt fixing support (14), a safety belt restraining groove (15) and at least one adjusting part (16), wherein the upper support (11) is rotatably connected with the lower support (12), the safety belt fixing support (14) is arranged on the lower support (12), the safety belt restraining groove (15) and the adjusting part (16) are respectively arranged on the upper support (11), and the adjusting part (16) can drive the upper support (11) to rotate relative to the lower support (12).

2. The seat back frame according to claim 1, wherein the upper bracket (11) comprises a connecting plate (111) and two upper side plates (112), the two upper side plates (112) are arranged at intervals along the length direction of the upper bracket (11), two ends of the connecting plate (111) are respectively connected with the two upper side plates (112), the lower bracket (12) comprises a supporting rod (121) and two lower side plates (122), the lower side plates (122) correspond to the upper side plates (112) one by one, the lower side plates (122) are rotatably connected with the corresponding upper side plates (112), and two ends of the supporting rod (121) are respectively connected with the two lower side plates (122).

3. The seat back frame according to claim 2, wherein the lower side plate (122) includes a lower side plate (1221) and a vertical sealing plate (1223), the lower side plate (1221) is rotatably connected to the upper side plate (112), the vertical sealing plate (1223) is connected to the lower side plate (1221), and two ends of the supporting rod (121) are respectively and fixedly connected to the lower side plate (1221) and/or the vertical sealing plate (1223).

4. The seat back frame according to claim 3, wherein the adjusting member (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 identical to 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 side plate (1221), and the driving device (161) can drive the driving rod (162) to move relative to the driving device (161) in the length direction.

5. The seat back frame according to claim 3, wherein the lower side plate (1221) is located at a side of the corresponding upper side plate (112) far away from the other upper side plate (112), an arc-shaped waist hole is provided on the upper side plate (112), a limit pin (1222) is provided on the lower side plate (1221) at a position corresponding to the arc-shaped waist hole, one end of the limit pin (1222) extends towards the upper side plate (112), and the limit pin (1222) is located in the arc-shaped waist hole.

6. The seat back frame according to claim 5, characterized in that a resilient member (17) is provided between the lower side panel (1221) and the upper side panel (112).

7. The seat back frame according to claim 2, characterized in that the belt fixing bracket (14) is provided on the support bar (121), the belt restraining groove (15) is provided on the connecting plate (111), and one end of the belt restraining groove (15) extends to the belt fixing bracket (14).

8. The seat back frame according to claim 7, wherein the belt restraint groove (15) has a U-shape in cross section in a radial direction with an open side away from the connecting plate (111).

9. The seat back frame according to claim 7, characterized in that the belt fixing bracket (14) is located between the support bar (121) and the connecting plate (111).

10. The seat back frame according to claim 7, characterized in that the seat belt fixing bracket (14) is close to one of the lower side plates (122), and one end of the lower side plate (122) far away from the upper side plate (112) is respectively provided with angle adjusting parts (18) at two sides of the lower bracket (12) in the length direction.

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