Double-rotating-shaft mechanism, seat assembly and vehicle

Abstract

The utility model discloses a double-rotating-shaft mechanism, a seat assembly and a vehicle, the double-rotating-shaft mechanism comprises a first connecting seat, a middle support and a second connecting seat, the first connecting seat is rotatably connected to one end of the middle support through a first rotating shaft, and the second connecting seat is rotatably connected to the other end of the middle support through a second rotating shaft. The middle support comprises a support body and a locking assembly attached to the support body, the locking assembly comprises a linkage unlocking piece, a first locking piece and a second locking piece, the linkage unlocking piece, the first locking piece and the second locking piece are rotatably arranged on the support body, and the linkage unlocking piece rotates relative to the support body; one end of the linkage unlocking piece is linked with the first locking piece and the second locking piece to synchronously rotate relative to the support body, the other end of the first locking piece and the end of the first connecting base are switched between a clamping state and a separating state, and the other end of the second locking piece and the end of the second connecting base are switched between a clamping state and a separating state. The double-rotating-shaft mechanism has the advantages of being simple in structure, convenient to control and capable of assisting the seat to be laid flat.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, and particularly relates to a double-rotating shaft mechanism, a seat assembly and a vehicle. Background Art

[0002] With the booming development of the automobile industry, the structural forms of automobiles are becoming more and more diverse, and people's requirements for the functionality of automobiles are also getting higher and higher. For example, the rear seats of more and more automobiles are beginning to develop in the direction of being able to be laid flat completely. However, for common back seats, they cannot be laid flat completely. Specifically, during the process of the rear seat of the automobile being flipped forward and laid flat, due to the relatively low rotation center of the rear seat, when it is flipped forward, the rear side of the lower end of the backrest will interfere with the trunk, the vehicle body, etc. At this time, the tail of the rear seat and other components inside the vehicle interfere and it cannot be laid flat completely, and it is also very difficult for the rear seat to be flipped backward and laid flat.

[0003] For example, Chinese Patent with the publication number CN212950264U discloses an automobile rear seat reclining device. This automobile rear seat reclining device can only recline the seat forward and cannot be flipped backward, and also cannot solve the problem that the rear seat cannot be laid flat completely due to the relatively low rotation center.

[0004] Therefore, the seats in the prior art have the problems of relatively low rotation center and inability to be laid flat completely. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems that the seats in the prior art have a relatively low rotation center and cannot be laid flat completely.

[0006] To solve the above technical problems, the utility model discloses a double-rotating shaft mechanism, which can be applied to vehicle seats to assist the vehicle seats to be reclined. Specifically, the double-rotating shaft mechanism includes: a first connecting seat, a middle bracket, and a second connecting seat. The first connecting seat is rotatably connected to one end of the middle bracket through a first rotating shaft, and the second connecting seat is rotatably connected to the other end of the middle bracket through a second rotating shaft.

[0007] The middle bracket includes a bracket body and a locking assembly attached to the bracket body. Among them, a first shaft hole and a second shaft hole are respectively arranged at both ends of the bracket body in the length direction. The first rotating shaft is arranged in the first shaft hole and the second rotating shaft is arranged in the second shaft hole; the locking assembly includes a linkage unlocking member, a first locking member, and a second locking member rotatably arranged on the bracket body. Among them, one end of the linkage unlocking member abuts against the same-side ends of the first locking member and the second locking member, and the other end of the first locking member is clamped with the end of the first connecting seat, and the other end of the second locking member is clamped with the end of the second connecting seat.

[0008] The linkage unlocking member rotates relative to the bracket body. One end of the linkage unlocking member drives the first locking member and the second locking member to rotate synchronously relative to the bracket body. The other end of the first locking member and the end of the first connecting seat, and the other end of the second locking member and the end of the second connecting seat switch between the clamped state and the separated state.

[0009] With the above technical solution, the present utility model provides a double-rotating shaft mechanism. The double-rotating shaft mechanism is provided with two rotating shafts, namely a first rotating shaft and a second rotating shaft. Both rotating shafts can serve as rotation fulcrums, and one of the two rotating shafts is set at a relatively high position. Therefore, when the double-rotating shaft mechanism is applied to a vehicle seat, it has a relatively high rotating shaft center point. A locking assembly is also provided to control the switching between the clamped state and the separated state of the end of the first locking member and the first connecting seat, and the end of the second locking member and the second connecting seat. Thereby indirectly controlling the switching between the locked state and the rotating state of the first rotating shaft and the second rotating shaft. The double-rotating shaft mechanism has the advantages of simple structure and convenient control.

[0010] Furthermore, it should be noted that when the double-rotating shaft mechanism is applied to a vehicle seat, it is installed under the vehicle seat. The double-rotating shaft mechanism acts as the rotating shaft of the vehicle seat. When the vehicle seat is turned forward or backward, because the double-rotating shaft mechanism has two rotating shafts (rotation centers), when the vehicle seat is turned forward, the upper rotating shaft serves as the actual rotating shaft, and at this time, the rotating position of the upper rotating shaft is relatively high, so the seat can be completely flattened. When turned backward, the lower rotating shaft closer to the bottom serves as the actual rotating shaft. Therefore, the front-back flipping adjustment of the seat can be realized, and the seat can be completely flattened both when flipped forward and backward.

[0011] Preferably, in the double-rotating shaft mechanism disclosed in the present utility model, the linkage unlocking member includes a linkage rotating shaft, an unlocking block, and an unlocking handle.

[0012] The linkage rotating shaft is rotatably arranged in the middle of the bracket body and partially protrudes from the bracket body. The unlocking block and the unlocking handle are sequentially fixed on the linkage rotating shaft. One end of the unlocking block can abut against one of the ends of the first locking member or the second locking member.

[0013] The unlocking handle drives the linkage rotating shaft to rotate. The linkage rotating shaft drives the unlocking block to rotate synchronously. One end of the unlocking block abuts against one of the ends of the first locking member or the second locking member, driving the first locking member and the second locking member to rotate. The first locking member and the first connecting seat, and the second locking member and the second connecting seat respectively switch from the clamped state to the separated state.

[0014] With the above technical solution, the linkage rotating shaft, the unlocking block, and the unlocking handle cooperate to work, having the advantages of small volume, convenient control, and sensitivity.

[0015] Preferably, in the double-rotating shaft mechanism disclosed by the present utility model, the linkage rotating shaft includes a first shaft segment and a second shaft segment formed along its axis direction. The first shaft segment is located inside the bracket body, and the second shaft segment protrudes from one end face of the bracket body. Among them, the unlocking block is fixedly arranged on the first shaft segment, and the unlocking handle is fixedly arranged on the second shaft segment.

[0016] Adopting the above technical solution, the linkage rotating shaft includes a first shaft segment and a second shaft segment, which ensures that both the unlocking block and the unlocking handle are fixed on one rotating shaft, and can also avoid interference between the unlocking block and the unlocking handle, ensuring the stable operation of the mechanism.

[0017] Preferably, in the double-rotating shaft mechanism disclosed by the present utility model, the first locking member includes a first locking claw and a first locking rotating shaft. The first locking rotating shaft is rotatably arranged on the bracket body, and the first locking claw is fixedly arranged on the first locking rotating shaft.

[0018] The second locking member includes a second locking claw and a second locking rotating shaft. The second locking rotating shaft is rotatably arranged on the bracket body, and the second locking claw is fixedly arranged on the second locking rotating shaft.

[0019] And the first locking claw abuts against the second locking claw, and engaging grooves are arranged on both the first locking claw and the second locking claw.

[0020] Adopting the above technical solution, the structures of the first locking member and the second locking member are basically the same, and the difference lies only in the installation positions and the actually controlled components. Among them, the first locking member is used to lock and control the first connecting seat, and the second locking member is used to lock and control the second connecting seat. Its structure is simple and the control is precise.

[0021] Preferably, in the double-rotating shaft mechanism disclosed by the present utility model, a first locking engaging groove adapted to the engaging groove of the first locking claw is arranged at the end of the first connecting seat close to the first locking claw, and a second locking engaging groove adapted to the engaging groove of the second locking claw is arranged at the end of the second connecting seat close to the second locking claw.

[0022] The embodiment of the present utility model also discloses a double-rotating shaft mechanism. The linkage unlocking member further includes an unlocking pull rope, a pull rope bracket, a handle elastic return member, and a return member bracket. Among them, the pull rope bracket is fixedly arranged on the bracket body. One end of the unlocking pull rope is connected to the unlocking buckle, and the other end passes through the pull rope bracket and is connected to the unlocking handle. The return member bracket is fixedly arranged on one side of the bracket body; one end of the handle elastic return member is fixedly connected to the unlocking handle, and the other end is fixedly connected to the return member bracket.

[0023] With the above technical solution, an unlocking pull rope is provided to control and drive the unlocking handle to rotate. After pulling the unlocking pull rope, the unlocking handle can be driven to rotate, thereby realizing the unlocking of the double-rotating shaft mechanism. And the handle elastic return member pulls the unlocking handle to reset after the unlocking handle rotates to unlock.

[0024] Further preferably, in the double-rotating shaft mechanism disclosed by the present utility model, the bracket body includes two bracket plates arranged symmetrically on both sides. The two bracket plates are fixedly arranged and form a hollow installation groove. Among them, the first connecting seat and the second connecting seat are partially located in the installation groove, and the locking assembly is located in the installation groove. And a plurality of shaft holes are spacedly arranged on the bracket body.

[0025] The bracket body includes two bracket plates arranged symmetrically on both sides. The two bracket plates are fixedly arranged and form a hollow installation groove, which can protect the locking assembly in the installation groove, prevent the double-rotating shaft mechanism from being damaged, and improve the service life.

[0026] The embodiment of the present utility model also discloses a double-rotating shaft mechanism, which further includes an elastic return member, a fixed bracket and a limit bracket; wherein

[0027] The limit bracket is fixedly arranged on one side of the first connecting seat. The fixed bracket is fixedly arranged on one side of the bracket body and is on the same side as the limit bracket. The elastic return member is fixedly arranged on the fixed bracket. One end of the elastic return member is fixedly connected to the fixed bracket, and the other end is fixedly connected to the limit bracket.

[0028] With the above technical solution, the function of the elastic return member is that when the double-rotating shaft mechanism rotates forward or backward, the elastic return member is compressed and provides a reset force when resetting.

[0029] The embodiment of the present utility model also discloses a seat assembly, including the double-rotating shaft mechanism of any one of the above. The seat assembly includes:

[0030] A seat backrest frame; two double-rotating shaft mechanisms are arranged on both sides of the seat backrest frame. The second connecting seat of the double-rotating shaft mechanism is fixedly connected to the seat backrest frame, and the first connecting seat of the double-rotating shaft mechanism is fixedly connected to the seat cushion frame of the seat; and it also includes.

[0031] An unlocking buckle and an unlocking pull rope. Two unlocking pull ropes are provided. One end of each of the two unlocking pull ropes is connected to the unlocking buckle, and the other ends are respectively connected to the locking assemblies of the two double-rotating shaft mechanisms.

[0032] With the above technical solution, when unlocking, the unlocking pull rope is used to pull two double-rotating shaft mechanisms to unlock, so that after the seat is unlocked, it can be flipped forward, and at the same time, it can be flipped backward and lie flat, and the seat angle can also be adjusted, realizing the angle adjustment and front-back flipping of the seat, solving the problem of the large reclining backrest pressing against the waist, and also enabling the vehicle to have a larger cargo space after being laid down.

[0033] An embodiment of the present invention also discloses a vehicle, including a vehicle body and the aforementioned seat assembly.

[0034] The beneficial effects of the present invention are:

[0035] The present invention provides a double-rotating shaft mechanism, a seat assembly with the double-rotating shaft mechanism, and a vehicle with the seat assembly. Because the double-rotating shaft mechanism has two rotating shafts, namely the first rotating shaft and the second rotating shaft, both rotating shafts can be used as rotation fulcrums, making it more flexible and convenient to use. And by controlling the first rotating shaft and the second rotating shaft through a locking component, it has the advantages of simple structure and convenient control. The double-rotating shaft mechanism simplifies its structure, reduces the manufacturing cost and maintenance cost, improves the transmission accuracy and has higher efficiency, and has the advantages of wide application range and higher flexibility. Furthermore, when the double-rotating shaft mechanism is applied to a vehicle seat, it has more prominent beneficial effects. After the vehicle seat is installed with the double-rotating shaft mechanism, the use comfort can be improved. When the vehicle seat rotates, flips forward or flips backward, it has two rotating shafts, that is, two rotation centers. When the vehicle seat is laid forward, the upper rotating shaft serves as the actual rotating shaft, and when laid backward, the lower rotating shaft closer to the bottom serves as the actual rotating shaft, thus realizing the front-back flipping adjustment of the seat and the complete flattening of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 An exploded structural view of the double-rotating shaft mechanism provided by an embodiment of the present invention;

[0037] Figure 2 A partial structural view of the linkage unlocking member in the double-rotating shaft mechanism provided by an embodiment of the present invention;

[0038] Figure 3 An overall structural view of the double-rotating shaft mechanism provided by an embodiment of the present invention;

[0039] Figure 4 A structural view of the double-rotating shaft mechanism in the locked state provided by an embodiment of the present invention;

[0040] Figure 5 A structural view of the double-rotating shaft mechanism in the separated state provided by an embodiment of the present invention;

[0041] Figure 6Schematic diagram of a seat assembly including a double-rotating shaft mechanism provided by an embodiment of the present utility model;

[0042] Figure 7 Exploded view of a seat assembly including a double-rotating shaft mechanism provided by an embodiment of the present utility model;

[0043] Figure 8 Schematic diagram when the seat assembly provided by an embodiment of the present utility model is about to flip forward after being unlocked;

[0044] Figure 9 Schematic diagram when the seat assembly provided by an embodiment of the present utility model is flipped forward and laid flat;

[0045] Figure 10 Schematic diagram when the seat assembly provided by an embodiment of the present utility model is about to flip backward after being unlocked;

[0046] Figure 11 Schematic diagram when the seat assembly provided by an embodiment of the present utility model is flipped backward and laid flat;

[0047] Figure 12 Schematic diagram of the seat assembly provided by an embodiment of the present utility model in a sitting posture state;

[0048] Figure 13 Schematic diagram when the seat assembly provided by an embodiment of the present utility model is folded forward;

[0049] Figure 14 Schematic diagram when the seat assembly provided by an embodiment of the present utility model is folded backward.

[0050] Explanation of reference numerals:

[0051] 100, First connecting seat;

[0052] 110, First rotating shaft; 120, First locking engagement groove;

[0053] 200, Middle bracket;

[0054] 210, First shaft hole; 220, Second shaft hole; 230, Third shaft hole; 240, Bracket plate; 250, Fourth shaft hole; 260, Fifth shaft hole;

[0055] 300, Second connecting seat;

[0056] 310, Second rotating shaft; 320, Second locking engagement groove;

[0057] 400, Locking assembly;

[0058] 410, Linkage rotating shaft;

[0059] 4101, First shaft section; 4102, Second shaft section;

[0060] 412. Unlocking toggle; 413. Unlocking handle; 414. Unlocking pull rope; 415. Pull rope bracket; 416. Elastic return member for handle; 417. Return member bracket;

[0061] 420. First locking member;

[0062] 421. First locking rotating shaft; 422. First rotating shaft hole; 423. First pawl; 424. First engaging portion; 425. First locking flange;

[0063] 430. Second locking member;

[0064] 431. Second locking rotating shaft; 432. Second rotating shaft hole; 433. Second pawl; 434. Second engaging portion; 435. Second locking flange;

[0065] 500. Elastic return member; 510. Fixed bracket; 520. Limit bracket;

[0066] 600. Seat back frame; 610. Unlocking latch;

[0067] 700. Dual rotating shaft mechanism;

[0068] 710. First working rotating shaft; 720. Second working rotating shaft;

[0069] 800. Seat cushion frame. Detailed implementation manner

[0070] With the vigorous development of the automotive industry, the structural forms of automobiles are becoming more and more diverse. The rear seats of more and more automobiles are beginning to develop in the direction of pure flat folding. Taking the rear seats of vehicles as an example, due to considerations of the comfort of the rear seats, the seat backs and seat cushions of the rear seats are relatively thick, and the rotation center of the rotating shaft of the rear seats of vehicles is generally set relatively low. In this case, when the rear seat is flipped forward, the lower end of the seat back of the rear seat of the vehicle will interfere with the seat cushion, and due to the low rotating shaft, the rear seat still cannot achieve pure flat folding after being folded down, and it is difficult to achieve flipping and folding backward.

[0071] To solve the above technical problems, the present utility model creatively proposes a dual rotating shaft mechanism, which is used to replace the rotating shaft center of the existing rear seat. Because it has two rotating shafts with different heights, the higher one plays a role when flipping forward, and the lower one plays a role when flipping backward. When flipping forward, the rotating shaft center is higher and it is easy to achieve pure flat folding. When flipping backward, the rotating shaft center is lower and it is also relatively easy to achieve pure flat folding.

[0072] First, a specific description of the dual-rotating shaft mechanism disclosed in this embodiment is given: The dual-rotating shaft mechanism can be applied to vehicle seats, such as the front row seats or the rear row seats, to assist the vehicle seat in tipping over. Specifically, reference can be made to Figure 1 , Figure 1 which is an exploded structural schematic diagram of the dual-rotating shaft mechanism. The dual-rotating shaft mechanism includes: a first connecting seat 100, a middle bracket 200, and a second connecting seat 300. The first connecting seat 100 is rotatably connected to one end of the middle bracket 200 through a first rotating shaft 110, and the second connecting seat 300 is rotatably connected to the other end of the middle bracket 200 through a second rotating shaft 310.

[0073] The middle bracket 200 includes a bracket body and a locking assembly 400 attached to the bracket body (reference can be made to Figure 2 ). Among them, a first shaft hole 210 and a second shaft hole 220 are respectively provided at both ends of the bracket body in the length direction. The first rotating shaft 110 is disposed in the first shaft hole 210 and the second rotating shaft 310 is disposed in the second shaft hole 220. The locking assembly 400 includes a linkage unlocking member rotatably disposed on the bracket body, a first locking member 420, and a second locking member 430. Among them, one end of the linkage unlocking member abuts against the same-side ends of the first locking member 420 and the second locking member 430, and the other end of the first locking member 420 is clamped with the end of the first connecting seat 100, and the other end of the second locking member 430 is clamped with the end of the second connecting seat 300.

[0074] When the linkage unlocking member rotates relative to the bracket body, one end of the linkage unlocking member drives the first locking member 420 and the second locking member 430 to rotate synchronously relative to the bracket body. The other end of the first locking member 420 and the end of the first connecting seat 100, and the other end of the second locking member 430 and the end of the second connecting seat 300 are switched between the clamped state and the separated state.

[0075] First, the dual-rotating shaft mechanism in this embodiment is described. The dual-rotating shaft mechanism is a mechanical structure including two working rotating shafts, and both rotating shafts can rotate. It should be understood that: The first connecting seat 100 is rotatably connected to the first shaft hole 210 of the middle bracket 200 through the first rotating shaft 110 to form an actual working rotating shaft, and the second connecting seat 300 is rotatably connected to the second shaft hole 220 of the middle bracket 200 through the second rotating shaft 310 to form another actual working rotating shaft, and the heights of the two actual working rotating shafts are different.

[0076] Furthermore, for the convenience of controlling the double-rotating shaft mechanism, the double-rotating shaft mechanism disclosed in this embodiment further includes a locking assembly 400. The locking assembly 400 is attached to the bracket body to control the first connecting seat 100 and the second connecting seat 300. The locking assembly 400 includes a linkage unlocking member, a first locking member 420, and a second locking member 430. The linkage unlocking member is used to control and link the first locking member 420 and the second locking member 430. The first locking member 420 is locked and engaged with or separated from the first connecting seat 100, and the second locking member 430 is engaged with or separated from the second connecting seat 300. Therefore, in this embodiment, by setting the locking assembly 400, the first rotating shaft 110 and the second rotating shaft 310 can be controlled to switch between the engaged state and the separated state. Under normal conditions, the locking assembly 400 controls the first rotating shaft 110 and the second rotating shaft 310 to be in the locked engaged state. When the first rotating shaft 110 and the second rotating shaft 310 need to rotate, the locking assembly 400 is used to control the first connecting seat 100 and the second connecting seat 300 to rotate relative to the middle bracket 200.

[0077] It should be further noted that the aforementioned locking assembly 400 being attached to the bracket body in this embodiment means that: the locking assembly 400 is attached and connected in a rotatable connection manner. And since the bracket body can be set as a single-body structure or a double-body structure. For example, when the bracket body is set as a single-body structure, the locking assembly 400 is rotatably attached to one side of the bracket body. When the bracket body is set as a double-body structure, there is an installation cavity in the middle of the bracket body, and the locking assembly 400 is located in the middle installation cavity.

[0078] More specifically, in the double-rotating shaft mechanism disclosed in this application, the linkage unlocking member, the first locking member 420, and the second locking member 430 can be arranged in various different ways. For example, the linkage unlocking member can first abut against the first locking member 420, and then the first locking member 420 and the second locking member 430 are locked and abutted; it can also be that the linkage unlocking member abuts against the first locking member 420 and the second locking member 430 simultaneously; it can also be that the linkage unlocking member abuts against one of the first locking member 420 or the second locking member 430, and the first locking member 420 or the second locking member 430 does not abut. However, in different such installation structures, when the linkage unlocking member rotates, it can drive the first locking member 420 and the second locking member 430 to unlock. Those skilled in the art can also set other installation structures according to actual needs.

[0079] With the above technical solution, the present utility model provides a double-rotating shaft mechanism. The double-rotating shaft mechanism is provided with two rotating shafts, namely a first rotating shaft 110 and a second rotating shaft 310. Both rotating shafts can serve as rotation fulcrums, and one of the two rotating shafts is set at a relatively high position. Therefore, when the double-rotating shaft mechanism is applied to a vehicle seat, it has a relatively high rotating shaft center point. A locking assembly 400 is also provided, and the locking assembly 400 is used to control the switching between the clamped state and the separated state of the end of the first locking member 420 and the first connecting seat 100, and the end of the second locking member 430 and the second connecting seat 300. Thereby indirectly controlling the switching between the locked state and the rotating state of the first rotating shaft 110 and the second rotating shaft 310. The double-rotating shaft mechanism has the advantages of simple structure and convenient control.

[0080] Further, when the double-rotating shaft mechanism is applied to a vehicle seat, it is installed under the vehicle seat. The double-rotating shaft mechanism acts as the rotating shaft of the vehicle seat. When the vehicle seat is turned forward or backward, because the double-rotating shaft mechanism has two rotating shafts (rotation centers), when the vehicle seat is turned forward, the upper rotating shaft serves as the actual rotating shaft. At this time, the rotating position of the upper rotating shaft is relatively high, so the seat can be completely flattened. When turned backward, the lower rotating shaft closer to the bottom serves as the actual rotating shaft. Therefore, the front-back flipping adjustment of the seat can be realized and the seat can be completely flattened when the seat is flipped forward and backward.

[0081] Next, the linkage unlocking member in the double-rotating shaft mechanism disclosed in this embodiment will be described:

[0082] Please refer to Figure 1 and Figure 2 , the linkage unlocking member includes a linkage rotating shaft 410, an unlocking block 412, and an unlocking handle 413. Among them, a third shaft hole 230 adapted to the linkage rotating shaft 410 is provided in the middle of the bracket body. The linkage rotating shaft 410 is rotatably arranged in the third shaft hole 230 and partially protrudes from the bracket body. The unlocking block 412 and the unlocking handle 413 are sequentially fixed on the linkage rotating shaft 410; the same-side ends of the first locking member 420 and the second locking member 430 protrude opposite to each other and are in contact with each other. One end of the unlocking block 412 can be in contact with one of the ends of the first locking member 420 or the second locking member 430.

[0083] The unlocking handle 413 drives the linkage rotating shaft 410 to rotate. The linkage rotating shaft 410 drives the unlocking block 412 to rotate synchronously. One end of the unlocking block 412 contacts one of the ends of the first locking member 420 or the second locking member 430 and drives the first locking member 420 and the second locking member 430 to rotate. The first locking member 420 and the first connecting seat 100, and the second locking member 430 and the second connecting seat 300 are respectively switched from the clamped state to the separated state.

[0084] Specifically, in this embodiment, for example, one end of the unlocking dial block 412 may abut against the first locking member 420, or one end of the unlocking dial block 412 may abut against the second locking member 430. When the unlocking handle 413 rotates and drives the linkage rotating shaft 410 and the unlocking dial block 412 to rotate, the unlocking dial block 412 toggles the first locking member 420 and the second locking member 430.

[0085] Next, refer to Figures 3 to 5 for a specific description. Figure 3 FIG. is a schematic diagram of the overall structure of the double-rotating shaft mechanism. The locking assembly 400 is located inside the bracket body. The linkage rotating shaft 410 partially protrudes from the bracket body. The unlocking handle 413 and the unlocking pull rope 414 are connected. The locking assembly 400 controls the switching between the locked state and the movable state of the first connecting seat 100 and the second connecting seat 300. As Figure 4 shown, when the first connecting seat 100 and the second connecting seat 300 are in the locked state, the first locking member 420 and the first connecting seat 100 are locked and engaged, and the second locking member 430 is locked and engaged with the second connecting seat 300. At this time, the first rotating shaft 110 and the second rotating shaft 310 are in the locked state and cannot rotate. When the first rotating shaft 110 (the first connecting seat 100) and the second rotating shaft 310 (the second connecting seat 300) need to be switched from the locked state to the rotating state, as Figure 5 shown, the unlocking pull rope 414 drives the unlocking handle 413 to rotate clockwise. The unlocking handle 413 drives the linkage rotating shaft 410 and the unlocking dial block 412 to rotate clockwise. The unlocking dial block 412 abuts against the first locking member 420 and the second locking member 430 and rotates counterclockwise. And at this time, the first locking member 420 is separated from the first connecting seat 100, and the second locking member 430 is separated from the second connecting seat 300. At this time, the first connecting seat 100 can rotate around the bracket body with the first rotating shaft 110 as the rotation center, and the second connecting seat 300 can rotate around the bracket body with the second rotating shaft 310 as the rotation center.

[0086] Those skilled in the art should understand that the first locking member 420 and the first connecting seat 100, and the second locking member 430 and the second connecting seat 300 can be locked and connected through various separable locking structures, such as meshing teeth, tooth grooves, sawtooth grooves, concave grooves, etc. Those skilled in the art can design and select according to actual needs, and this embodiment does not make specific limitations on this.

[0087] With this structural design, the linkage rotating shaft 410, the unlocking dial block 412, and the unlocking handle 413 cooperate to work, having the advantages of small volume, convenient control, and sensitivity.

[0088] Further preferably, in the double-rotating shaft mechanism disclosed in the embodiment of the present invention, please refer to Figure 2, the linkage rotating shaft 410 includes a first shaft section 4101 and a second shaft section 4102 that are integrally formed and formed along its axial direction. The first shaft section 4101 is located inside the support body, and the second shaft section 4102 protrudes from one end face of the support body. Among them, the unlocking block 412 is fixedly arranged on the first shaft section 4101, and the unlocking handle 413 is fixedly arranged on the second shaft section 4102; and the first shaft section 4101 and the unlocking block 412, the second shaft section 4102 and the unlocking handle 413 are fixedly connected by key connection or waist-shaped holes.

[0089] Those skilled in the art should understand that the connection methods between the first shaft section 4101 and the unlocking block 412, and between the second shaft section 4102 and the unlocking handle 413 include but are not limited to spline connection, waist-shaped hole connection, snap connection, and integral forming. Figure 2 Illustrated in this embodiment is the way that the first shaft section 4101 and the unlocking block 412, and the second shaft section 4102 and the unlocking handle 413 are connected by waist-shaped holes.

[0090] With this structural design, the linkage rotating shaft 410 includes the first shaft section 4101 and the second shaft section 4102, ensuring that both the unlocking block 412 and the unlocking handle 413 are fixed on one rotating shaft, and also avoiding interference between the unlocking block 412 and the unlocking handle 413, ensuring the stable operation of the mechanism.

[0091] Further preferably, please refer to Figure 1 In the double rotating shaft mechanism disclosed in this embodiment, the first locking member 420 includes a first locking claw and a first locking rotating shaft 421. The first locking rotating shaft 421 is rotatably arranged on the support body, and the first locking claw is fixedly arranged on the first locking rotating shaft 421. The second locking member 430 includes a second locking claw and a second locking rotating shaft 431. The second locking rotating shaft 431 is rotatably arranged on the support body, and the second locking claw is fixedly arranged on the second locking rotating shaft 431. The first locking claw abuts against the second locking claw, and meshing grooves are provided on both the first locking claw and the second locking claw.

[0092] Further refer to Figure 2 Taking one specific implementation manner of the first locking claw and the second locking claw as an example for illustration, those skilled in the art should understand that the first locking claw and the second locking claw can also be set to other specific structures. The first locking claw includes a first rotating shaft hole 422, a first claw 423, a first meshing portion 424, and a first locking flange 425. The end of the first locking rotating shaft 421 is fixed in the first rotating shaft hole 422. The first claw 423 extends towards the first connecting seat 100. The first meshing portion 424 is located on the side of the first claw 423 close to the first connecting seat 100 and meshes and locks with the end of the first connecting seat 100. The first locking flange 425 extends away from the first connecting seat 100 towards the second locking member 430.

[0093] The second locking pawl includes a second rotating shaft hole 432, a second pawl 433, a second engaging portion 434, and a second locking flange 435. The end of the second locking rotating shaft 431 is fixed within the second rotating shaft hole 432. The second engaging portion 434 is located on the side of the second pawl 433 close to the second connecting seat 300 and engages and locks with the end of the second connecting seat 300. The second locking flange 435 extends away from the second connecting seat 300 and towards the first locking member 420. And the first locking flange 425 abuts against the second locking flange 435, the unlocking block 412 abuts against the first locking flange 425 or the second locking flange 435, and both the first engaging portion 424 and the second engaging portion 434 are serrated engaging grooves.

[0094] With this structural design, the structures of the first locking member 420 and the second locking member 430 are basically the same, and the only differences lie in the installation positions and the components actually controlled. Among them, the first locking member 420 is used to lock and control the first connecting seat 100, and the second locking member 430 is used to lock and control the second connecting seat 300. Its structure is simple and the control is precise.

[0095] Preferably, please refer to Figure 1 , in the double rotating shaft mechanism disclosed by the present utility model, a first locking engaging groove 120 adapted to the first engaging portion 424 is provided at the end of the first connecting seat 100 close to the first locking pawl, and a second locking engaging groove 320 adapted to the second engaging portion 434 is provided at the end of the second connecting seat 300 close to the second locking pawl.

[0096] Further refer to Figure 1 and Figure 2 , the embodiment of the present utility model also discloses a double rotating shaft mechanism. The linkage unlocking member further includes an unlocking pull rope 414, a pull rope bracket 415, a handle elastic return member 416, and a return member bracket 417. Among them, the pull rope bracket 415 is fixedly arranged on the bracket body. One end of the unlocking pull rope 414 is connected to the unlocking buckle 610, and the other end passes through the pull rope bracket 415 and is connected to the unlocking handle 413. The return member bracket 417 is fixedly arranged on one side of the bracket body; one end of the handle elastic return member 416 is fixedly connected to the unlocking handle 413, and the other end is fixedly connected to the return member bracket 417.

[0097] With the above technical solution, an unlocking drawstring 414 is provided to control and drive the unlocking handle 413 to rotate. After pulling the unlocking drawstring 414, the unlocking handle 413 can be driven to rotate, thereby realizing the unlocking of the double-rotating shaft mechanism. After the unlocking handle 413 rotates and unlocks, the handle elastic return member 416 will undergo elastic deformation and then pull the unlocking handle 413 back to its original position. And because only partial first locking engagement grooves 120 and second locking engagement grooves 320 are provided, after the first connecting seat 100 and the first locking pawl, and the second connecting seat 300 and the second locking pawl are separated and misaligned, even if the unlocking handle 413 returns to its original position, the first connecting seat 100 and the second connecting seat 300 can still rotate.

[0098] Further preferably, in the double-rotating shaft mechanism disclosed in the present utility model, the bracket body includes two bracket plates 240 arranged in double-sided symmetry. The two bracket plates 240 are fixedly arranged and form a hollow installation groove. Among them, the first connecting seat 100 and the second connecting seat 300 are partially located in the installation groove, and the locking assembly 400 is located in the installation groove. And a plurality of shaft holes are spacedly arranged on the bracket body.

[0099] Specifically, referring to Figure 1 , the plurality of shaft holes spacedly arranged on the bracket body are respectively: a first shaft hole 210, a second shaft hole 220, a third shaft hole 230, a fourth shaft hole 250, and a fifth shaft hole 260.

[0100] The bracket body includes two bracket plates 240 arranged in double-sided symmetry. The two bracket plates 240 are fixedly arranged and form a hollow installation groove, which can protect the locking assembly 400 in the installation groove, prevent the double-rotating shaft mechanism from being damaged, and improve the service life.

[0101] An embodiment of the present utility model also discloses a double-rotating shaft mechanism. Please refer to Figure 1 , which further includes an elastic return member 500, a fixed bracket 510, and a limit bracket 520. The limit bracket 520 is fixedly arranged on one side of the first connecting seat 100. The fixed bracket 510 is fixedly arranged on one side of the bracket body and is on the same side as the limit bracket 520. The elastic return member 500 is fixedly arranged on the fixed bracket 510. One end of the elastic return member 500 is fixedly connected to the fixed bracket 510, and the other end is fixedly connected to the limit bracket 520.

[0102] It should be noted that in this embodiment, the elastic return member 500 acts on the bracket body. For example, when the double-rotating shaft mechanism is installed on the rear row seat and the seat is tilted forward at a certain angle when the seat is folded forward, the elastic return member 500 is compressed, and when the seat is restored, an elastic return force is provided.

[0103] With this structural design, the elastic return member 500 functions to be compressed when the double-rotating shaft mechanism rotates forward or backward, and provides a return force during reset.

[0104] The embodiment of the present example also discloses a seat assembly. Please refer to Figure 6 and Figure 7 , including the double-rotating shaft mechanism of any one of the above, the seat assembly includes:

[0105] A seat backrest frame 600; two double-rotating shaft mechanisms 700 are arranged on both sides of the seat backrest frame 600. The second connecting seat 300 of the double-rotating shaft mechanism 700 is fixedly connected to the seat backrest frame 600, and the first connecting seat 100 of the double-rotating shaft mechanism 700 is fixedly connected to the seat cushion frame 800 of the seat.

[0106] An unlocking handle 610 and unlocking ropes 414. There are two unlocking ropes 414. One end of the two unlocking ropes 414 is connected to the unlocking handle 610, and the other ends are respectively connected to the locking assemblies 400 of the two double-rotating shaft mechanisms 700.

[0107] With this structural design, when unlocking, the two double-rotating shaft mechanisms 700 are pulled to unlock through the unlocking ropes 414, so that after the seat is unlocked, it can be turned forward, and at the same time, it can be turned backward and lie flat, and the seat angle can also be adjusted, realizing the angle adjustment and forward and backward flipping of the seat, solving the problem that the backrest presses against the waist after large reclining, and also enabling the vehicle to have a larger cargo space after being laid down. By setting the double-rotating shaft mechanism 700, the problem of the step difference between the forward-backrest and the rear trunk is solved, and at the same time, the problem of the small Z-direction storage space after the seat is laid flat is solved. The upper shaft of the double-rotating shaft mechanism 700 controls the forward / backward backrest angle adjustment of the rear seat, and through the large-angle backward adjustment of the lower shaft of the double-rotating shaft mechanism, 180° flat-flipping adjustment is realized, and the problem of the back pressing against the waist at the rear of large reclining is solved.

[0108] The embodiment of the present example also discloses a vehicle, including a vehicle body, and also including the aforementioned seat assembly. The seat assembly can be a front-row seat or a rear-row seat. The vehicle can be different models such as an oil vehicle, an electric vehicle, a plug-in hybrid vehicle, an extended-range vehicle, etc. The present example does not make specific limitations on this.

[0109] In summary, the present utility model provides a double-rotating shaft mechanism 700, a seat assembly equipped with the double-rotating shaft mechanism 700, and a vehicle equipped with the seat assembly. Since the double-rotating shaft mechanism 700 has two rotating shafts, namely a first rotating shaft 110 and a second rotating shaft 310, both rotating shafts can serve as rotation fulcrums, making it more flexible and convenient to use. Moreover, by controlling the first rotating shaft 110 and the second rotating shaft 310 through a locking assembly 400, it has the advantages of simple structure and convenient control. In addition, the double-rotating shaft mechanism 700 simplifies its structure, reduces manufacturing costs and maintenance costs, improves transmission accuracy and has higher efficiency, and has the advantages of wide application range and higher flexibility. Furthermore, when the double-rotating shaft mechanism 700 is applied to a vehicle seat, it has more prominent beneficial effects. After the vehicle seat is installed with the double-rotating shaft mechanism 700, the use comfort can be improved. When the vehicle seat rotates, tilts forward or tilts backward, it has two rotating shafts, that is, two rotation centers. When the vehicle seat tilts forward, the upper rotating shaft serves as the actual rotating shaft, and when tilting backward, the lower rotating shaft closer to the bottom serves as the actual rotating shaft. Therefore, the front and back flipping adjustment of the seat and the complete flattening of the seat are realized.

[0110] Finally, an example is given for the installation and application of the double-rotating shaft mechanism 700 disclosed in this embodiment when used on the rear seat of a vehicle:

[0111] When the double-rotating shaft mechanism 700 is installed and applied to the rear seat of a vehicle as shown in Figure 6 and Figure 8 When it is necessary to tilt the backrest of the rear seat forward, refer to Figure 8 and Figure 9 Manually operate the unlocking handle 610. The unlocking handle 610 drives two unlocking ropes 414 to act. The two unlocking ropes 414 drive the unlocking handle 413 and the unlocking block 412 to act respectively. Then the unlocking block 412 toggles the first locking member 420 and the second locking member 430 to unlock. At this time, both the first rotating shaft 110 and the second rotating shaft 310 are unlocked. However, refer to Figure 8 When tilting forward, during the working process of the double-rotating shaft mechanism 700, the upper rotating shaft serves as the actual first working rotating shaft 710. When the rear seat tilts forward, it rotates forward around the first working rotating shaft 710. Since the position of the first working rotating shaft 710 is relatively high, it can avoid interference between the bottom of the seat backrest and the seat cushion, enabling the rear seat to reach a suitable fully flat tilting posture. When it is necessary to reset the seat backrest, simply rotate the seat backrest counterclockwise to reset. After resetting, the first locking member 420 and the second locking member 430 are respectively locked and engaged with the first connecting seat 100 and the second connecting seat 300.

[0112] When it is necessary to tilt the backrest of the rear seat backward, refer to Figure 10 and Figure 11, manually operate the unlocking handle 610. The unlocking handle 610 actuates two unlocking pull ropes 414. The two unlocking pull ropes 414 drive the unlocking handle 413 and the unlocking block 412 to actuate respectively. Then, the unlocking block 412 toggles the first locking member 420 and the second locking member 430 to unlock. At this time, both the first rotating shaft 110 and the second rotating shaft 310 are unlocked. However, referring to Figure 10 , when turning backward, during the operation of the double-rotating-shaft mechanism 700, the lower rotating shaft serves as the actual second working rotating shaft 720. When the rear seat turns backward, it rotates forward around the second working rotating shaft 720. Since the position of the second working rotating shaft 720 is relatively low, it can avoid interference between the bottom of the seat back and the seat cushion when the seat back turns backward, enabling the rear seat to turn backward to reach a proper flat-laying posture. When it is necessary to reset the seat back, just pull the seat back to rotate clockwise for resetting. After resetting, the first locking member 420 and the second locking member 430 are respectively locked and engaged with the first connecting seat 100 and the second connecting seat 300.

[0113] Finally, referring to Figures 12 to 14 is the actual posture of the seat, Figure 12 is the state when the seat is in the normal sitting posture, Figure 13 is the state when the seat is folded forward, Figure 14 is the state when the seat is folded backward.

[0114] It should be noted that, in addition to the embodiments of the present invention described in the above specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details are included in the above description. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0115] It should be noted that in this specification, similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0116] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0117] The terms "first", "second", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0118] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0119] Although the present utility model has been illustrated and described by referring to some preferred embodiments of the present utility model, those of ordinary skill in the art should understand that the above content is a further detailed description of the present utility model in combination with specific embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present utility model.

Claims

1. A dual-shaft mechanism, characterized in that: include: A first connecting seat, a middle bracket, and a second connecting seat, wherein the first connecting seat is rotatably connected to one end of the middle bracket via a first rotating shaft, and the second connecting seat is rotatably connected to the other end of the middle bracket via a second rotating shaft; in The middle bracket comprises a bracket body and a locking assembly attached to the bracket body, wherein the first axial hole and the second axial hole are respectively provided at both ends of the bracket body in the length direction, the first rotating shaft is provided in the first axial hole and the second rotating shaft is provided in the second axial hole; the locking assembly comprises a linkage unlocking member, a first locking member and a second locking member rotatably provided on the bracket body, wherein one end of the linkage unlocking member abuts against the ends on the same side of the first locking member and the second locking member, and the other end of the first locking member is clamped with the end of the first connecting seat, and the other end of the second locking member is clamped with the end of the second connecting seat; and The linkage unlocking member rotates relative to the bracket body, and one end of the linkage unlocking member links the first locking member and the second locking member to rotate synchronously relative to the bracket body, and the other end of the first locking member and the end of the first connecting seat, and the other end of the second locking member and the end of the second connecting seat switch between a clamped state and a separated state.

2. The dual-shaft mechanism according to claim 1, characterized in that: The linkage unlocking member includes a linkage rotating shaft, an unlocking block and an unlocking handle; in The linkage shaft is rotatably disposed in the middle of the bracket body and partially protrudes from the bracket body, and the unlocking block and the unlocking handle are fixedly disposed on the linkage shaft in sequence; one end of the unlocking block can abut against one end of the first locking member or the second locking member; and The unlocking handle drives the linkage shaft to rotate, and the linkage shaft drives the unlocking block to rotate synchronously. One end of the unlocking block abuts against one end of the first locking member or the second locking member, driving the first locking member and the second locking member to rotate, and the first locking member and the first connecting seat, and the second locking member and the second connecting seat are respectively switched from the clamping state to the separation state.

3. The dual-shaft mechanism according to claim 2, characterized in that: The linkage shaft comprises a first shaft section and a second shaft section formed along the axis direction thereof, the first shaft section is located in the bracket body, and the second shaft section protrudes from one side end surface of the bracket body; in The unlocking block is fixedly arranged on the first shaft segment, and the unlocking handle is fixedly arranged on the second shaft segment.

4. The dual-shaft mechanism according to claim 2, characterized in that: The first locking member includes a first locking pawl and a first locking shaft, the first locking shaft is rotatably disposed on the bracket body, and the first locking pawl is fixedly disposed on the first locking shaft; The second locking member includes a second locking pawl and a second locking shaft, the second locking shaft is rotatably disposed on the bracket body, and the second locking pawl is fixedly disposed on the second locking shaft; The first locking pawl abuts against the second locking pawl, and both the first locking pawl and the second locking pawl are provided with an engagement groove.

5. The dual-shaft mechanism according to claim 4, characterized in that: The end of the first connecting seat close to the first locking pawl is provided with a first locking engagement groove adapted to the engagement groove of the first locking pawl; and The end of the second connecting seat close to the second locking pawl is provided with a second locking engagement groove adapted to the engagement groove of the second locking pawl.

6. The dual-shaft mechanism according to claim 2, characterized in that: The linkage unlocking member also includes an unlocking pull rope, a pull rope bracket, a handle elastic return member and a return member bracket; in The pull rope bracket is fixedly set on the bracket body, one end of the unlocking pull rope is connected to the unlocking buckle, and the other end passes through the pull rope bracket and is connected to the unlocking handle, and the return member bracket is fixedly set on one side of the bracket body; one end of the handle elastic return member is fixedly connected to the unlocking handle, and the other end is fixedly connected to the return member bracket.

7. The dual-shaft mechanism according to claim 1, characterized in that: The support body comprises two support plates which are symmetrically arranged on both sides, and the two support plates are fixedly arranged and formed with a hollow mounting groove; The first connecting seat and the second connecting seat are partially located in the mounting groove, and the locking assembly is located in the mounting groove; and The bracket body is provided with a plurality of axial holes at intervals.

8. The dual-shaft mechanism according to claim 1, characterized in that: It also includes an elastic return component, a fixed bracket and a limit bracket; The limiting bracket is fixedly arranged on one side of the first connecting seat, the fixing bracket is fixedly arranged on one side of the bracket body and is located on the same side as the limiting bracket, the elastic return member is fixedly arranged on the fixing bracket, one end of the elastic return member is fixedly connected to the fixing bracket, and the other end is fixedly connected to the limiting bracket.

9. A seat assembly, characterized in that: Comprising the dual-shaft mechanism according to any one of claims 1 to 8, the seat assembly comprises: A seat back frame; two of the dual-shaft mechanisms are provided on both sides of the seat back frame, the second connecting seat of the dual-shaft mechanism is fixedly connected to the seat back frame, and the first connecting seat of the dual-shaft mechanism is fixedly connected to the seat cushion frame of the seat; and further comprising: An unlocking handle and an unlocking pull rope, wherein two unlocking pull ropes are provided, one end of the two unlocking pull ropes is connected to the unlocking handle, and the other end is respectively connected to the locking components of the two double-rotating shaft mechanisms.

10. A vehicle, comprising a vehicle body, characterized in that: Also included is the seat assembly as claimed in claim 9.

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