A chassis assembly and a seat

Abstract

The application relates to the technical field of seats, and discloses a chassis assembly and a seat. The chassis assembly comprises a cushion, a tail plate, a first transmission mechanism and a second transmission mechanism. The first transmission mechanism comprises a first component, a second component and a third component which are rotationally connected in sequence. The second transmission mechanism can push a driven part forward to slide through the tail plate, so that the cushion slides forward. The first transmission mechanism and the tail plate constitute a planar four-bar linkage structure, so that when the tail plate rotates backward, the front end of the cushion is tilted upward. When the tail plate rotates backward, the driven part in the second transmission mechanism drives the cushion to move forward. When a user leans backward, the tail plate can be driven, linkage between the cushion and the backrest is realized, the tail plate rotates to make the cushion move forward and the front end of the cushion tilt upward, so that the safety and stability are improved, the front end of the tilted cushion can support the legs of the user, and the use experience is improved.

Description

Technical Field

[0001] This invention relates to the field of seating technology, specifically to a chassis assembly and a seat. Background Technology

[0002] Seats are now a common piece of equipment used in daily life, and the seat chassis is an essential component. Some seats are equipped with a mechanism that links the seat chassis and the backrest. When the backrest rotates backward, the seat cushion can move forward to prevent the center of gravity from shifting too far backward, thus improving safety and stability. However, in some of the related technologies, seats with this linkage mechanism have issues with user experience. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a chassis component that can realize linkage functions while improving the user experience.

[0004] The present invention also proposes a seat having the above-described chassis components.

[0005] According to a first aspect of the present invention, a chassis assembly includes a seat, a tailgate, a first transmission mechanism, and a second transmission mechanism. The tailgate is used to connect to a back beam. The first transmission mechanism has a first axis, a second axis, a third axis, and a fourth axis that are parallel to each other, and includes a first component, a second component, and a third component that are rotatably connected in sequence. The tailgate is rotatably connected to the first component and the third component. The tailgate is rotatable relative to the first component about the first axis, the first component is rotatable relative to the second component about the second axis, the second component is rotatable relative to the third component about the third axis, and the third component is rotatable relative to the tailgate about the fourth axis. The third component is located above the first component, and the tailgate is located behind the second component. The second transmission mechanism includes a driven member. The seat is connected to the driven member, the driven member is slidably connected to the third component, and the driven member is drively connected to the tailgate. The tailgate is rotatable about the first axis to be in an initial position and a reclining position. When the tailgate is in the initial position, the third axis is located in front of the second axis in the forward-backward direction. When the tail plate rotates from the initial position to the tilting position, the fourth axis rotates backward relative to the first axis, and the tail plate drives the third component to move so that the third axis moves backward relative to the second axis, increasing the vertical distance between the second axis and the third axis; the tail plate drives the driven member to move so that the driven member slides forward relative to the third component.

[0006] The chassis assembly according to embodiments of the present invention has at least the following beneficial effects: the first transmission mechanism and the tailplate form a planar four-bar linkage structure, and by designing the position of each rotating joint of the tailplate in its initial position, when the tailplate rotates backward, the third axis at the upper end of the second component moves backward, and the distance relative to the second axis in the vertical direction increases, achieving the technical effect of the front end of the seat cushion tilting upward. The tailplate is also connected to the second transmission mechanism, and when the tailplate rotates backward, the driven component in the second transmission mechanism drives the seat cushion to move forward. The tailplate is connected to the back beam, and the user can drive the tailplate by leaning back, realizing the linkage between the seat cushion and the backrest. The rotation of the tailplate can make the seat cushion move forward while tilting upward at the front end, which not only avoids excessive rearward shift of the center of gravity, improving safety and stability, but also provides leg support for the user, improving the user experience.

[0007] According to some embodiments of the present invention, the first component has a first slot and a second slot on the side facing the third component. The first transmission mechanism includes a rotating shaft, which rotatably connects the tail plate and the third component. The rotating shaft is coaxial with the fourth axis and is located in the front-rear direction. The first slot is located in front of the second slot and is located below the second slot in the up-down direction. When the tail plate is in the initial position, the rotating shaft is disposed in the first slot. When the tail plate is in the rearward position, the rotating shaft is disposed in the second slot.

[0008] According to some embodiments of the present invention, the second transmission mechanism includes a linkage module, the driven member is connected to the tail plate through the linkage module, the linkage module has a fifth axis, a sixth axis and a seventh axis that are parallel to each other, the linkage module includes a first link and a second link, the two ends of the first link are rotatably connected to the tail plate and the second link, the second link is rotatably connected to the first component and the driven member, the second link can rotate relative to the first link about the fifth axis, the second link can rotate relative to the first component about the sixth axis, the second link can rotate relative to the driven member about the seventh axis, in the up-down direction, the sixth axis is located between the fifth axis and the seventh axis, the fifth axis is located below the sixth axis, when the tail plate is in the initial position, in the front-back direction, the fifth axis is located in front of the seventh axis, when the tail plate rotates from the initial position to the rearward position, the tail plate drives the first link to move, so that the fifth axis moves backward, thereby causing the seventh axis to move forward.

[0009] According to some embodiments of the present invention, the first link is rotatably connected to the rotating shaft, and the first link can rotate relative to the tail plate about the rotating shaft, and / or, the link module includes a third link, the two ends of the third link are respectively rotatably connected to the second link and the driven member, and the third link can rotate relative to the second link about the seventh axis.

[0010] According to some embodiments of the present invention, the chassis assembly includes a gear shift pin, and the tail plate has a plurality of gear shift holes, which are circumferentially spaced around the first axis. The gear shift pin can be driven to be inserted into any of the gear shift holes to restrict the tail plate from rotating around the first axis.

[0011] According to some embodiments of the present invention, the second transmission mechanism includes a gear module, the driven member is connected to the tail plate through the gear module, the gear module includes a first gear and a rack that are connected in transmission, the first gear is fixedly connected to the tail plate, and the rack is fixedly connected to the driven member, the first gear and the rack are configured such that when the tail plate rotates from the initial position to the rearward position, the rack moves forward relative to the first gear, so that the driven member moves forward.

[0012] According to some embodiments of the present invention, the gear module includes a compound gear. In the left-right direction, both the first gear and the rack mesh with the compound gear. The compound gear meshes in front of the first gear, and the rack meshes above the compound gear. When the tail plate drives the first gear to rotate backward, the compound gear is driven to rotate so that the rack moves forward.

[0013] According to some embodiments of the present invention, the chassis assembly includes a first elastic element, the two ends of which are respectively connected to a first component and a second component. When the second component rotates rearward relative to the first component, the elastic force of the first elastic element is used to drive the second component to rotate forward relative to the first component.

[0014] According to some embodiments of the present invention, the third component is provided with a guide groove in the front-rear direction, the chassis assembly includes a guide block, the guide block is fixedly connected to the driven member and slidably disposed in the guide groove, and / or, the chassis assembly includes a roller, the roller is rotatably connected to the third component and abuts against the driven member, and when the driven member moves forward relative to the third component, the roller rotates about its own axis.

[0015] According to a second aspect of the present invention, a seat includes a backrest and a chassis assembly as described in any one of the first aspects of the present invention, wherein the backrest is connected to the tail plate, and the tail plate can rotate from the initial position to the reclining position when the backrest is driven to rotate rearward.

[0016] The seat according to an embodiment of the present invention has at least the following beneficial effects: the first transmission mechanism and the tailboard form a planar four-bar linkage structure, and by designing the position of each rotating joint of the tailboard in its initial position, when the tailboard rotates backward, the third axis at the upper end of the second component moves backward, and the distance relative to the second axis in the vertical direction increases, achieving the technical effect of the front end of the seat cushion tilting upward. The tailboard is also connected to the second transmission mechanism, and when the tailboard rotates backward, the driven component in the second transmission mechanism drives the seat cushion to move forward. The tailboard is connected to the back beam, and the user can drive the tailboard by leaning back, realizing the linkage between the seat cushion and the backrest. The rotation of the tailboard can make the seat cushion move forward while tilting upward at the front end, which not only avoids excessive rearward shift of the center of gravity, improving safety and stability, but also provides leg support for the user, improving the user experience and safety performance of the seat.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a perspective view of the chassis assembly in the first embodiment of the present invention; Figure 2 This is an exploded view of the chassis assembly in the first embodiment of the present invention; Figure 3 This is an initial side view of the chassis assembly in the first embodiment of the present invention; Figure 4 This is a rear-tilt side view of the chassis assembly in the first embodiment of the present invention; Figure 5 This is a schematic diagram of the motion of the first transmission mechanism in one embodiment of the present invention; Figure 6 This is an exploded view of the chassis assembly in the second embodiment of the present invention; Figure 7 This is a partial schematic diagram of a chassis assembly in one embodiment of the present invention; Figure 8 for Figure 7 A magnified view of region A in the middle.

[0019] Reference numerals: Chassis assembly 100; Seat cushion 101; Tail plate 102; First transmission mechanism 103; First component 104; Second component 105; Third component 106; Second transmission mechanism 107; Follower 108; Link module 109; First link 110; Second link 111; Third link 112; First slot 201; Second slot 202; Rotating shaft 203; Gear pin 204; Gear hole 205; Second elastic element 206; First elastic element 207; Guide groove 208; Guide block 209; Roller 210; First elastic element 211; First axis 301; Second axis 302; Third axis 303; Fourth axis 304; Fifth axis 305; Sixth axis 306; Seventh axis 307; Gear module 601; First gear 602; Rack 603; Compound gear 604. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] refer to Figures 1 to 5 According to a first aspect embodiment of the present invention, a chassis assembly 100 includes a seat 101, a tailgate 102, a first transmission mechanism 103, and a second transmission mechanism 107. The tailgate 102 is used to connect to the back beam. The first transmission mechanism 103 has a first axis 301, a second axis 302, a third axis 303, and a fourth axis 304 that are parallel to each other, and includes a first component 104, a second component 105, and a third component 106 that are rotatably connected in sequence. The tailgate 102 is rotatably connected to the first component 104 and the third component 106. The tailgate 102 can rotate relative to the first component 104 about the first axis 301, the first component 104 can rotate relative to the second component 105 about the second axis 302, the second component 105 can rotate relative to the third component 106 about the third axis 303, and the third component 106 can rotate relative to the tailgate 102 about the fourth axis 304. The third component 106 is located above the first component 104, and the tailgate 102 is located behind the second component 105. The first transmission mechanism 103 forms... Figure 5 The planar four-bar structure shown, Figure 5 The image above is a schematic diagram of the tailplate 102 in its initial state. Figure 6 The following diagram shows the tailboard 102 in a tilted-back position. It can be seen that the rearward rotation of the tailboard 102 can drive the second component 105 at the front end to rotate upward around the second axis 302, achieving the technical effect of the front end of the seat cushion 101 tilting up.

[0026] The second transmission mechanism 107 includes a follower 108, a seat 101 connected to the follower 108, the follower 108 slidably connected to the third component 106, and the follower 108 being drively connected to the tail plate 102. The tail plate 102 can rotate around the first axis 301 to be in an initial position and a tilted position. When the tail plate 102 is in the initial position, the third axis 303 is located in front of the second axis 302 in the front-rear direction. When the tail plate 102 rotates from the initial position to the tilted position, the fourth axis 304 rotates backward relative to the first axis 301. The tail plate 102 drives the third component 106 to move so that the third axis 303 moves backward relative to the second axis 302, increasing the vertical distance between the second axis 302 and the third axis 303. The tail plate 102 drives the follower 108 to move so that the follower 108 slides forward relative to the third component 106. The second transmission mechanism 107 can push the driven member 108 forward via the tail plate 102, thereby causing the seat cushion 101 to slide forward. The second transmission mechanism 107 can push the seat cushion 101 forward in several ways. Besides the linkage module 109 and gear module 601 described below, a push rod can also be used to connect the tail plate 102 and the driven member 108. When the tail plate 102 rotates backward, the push rod pushes the driven member 108 forward, thereby causing the seat cushion 101 to slide forward.

[0027] The first transmission mechanism 103 and the tail plate 102 form a planar four-bar linkage. By designing the position of each rotating joint of the tail plate 102 in its initial position, when the tail plate 102 rotates backward, the third axis 303 at the upper end of the second component 105 moves backward, and the distance relative to the second axis 302 in the vertical direction increases, achieving the technical effect of the front end of the seat cushion 101 tilting upward. The tail plate 102 is also connected to the second transmission mechanism 107. When the tail plate 102 rotates backward, the driven component 108 in the second transmission mechanism 107 drives the seat cushion 101 forward. The tail plate 102 is connected to the back beam; when the user leans back, it drives the tail plate 102, realizing the linkage between the seat cushion 101 and the backrest. The rotation of the tail plate 102 causes the seat cushion 101 to move forward while tilting upward at the front end, preventing excessive rearward shift of the center of gravity, improving safety and stability. The tilted front end of the seat cushion 101 also supports the user's legs, enhancing the user experience.

[0028] refer to Figures 2 to 4In some embodiments of the present invention, the first component 104 is provided with a first slot 201 and a second slot 202 on the side facing the third component 106. The first transmission mechanism 103 includes a rotating shaft 203, which rotatably connects the tail plate 102 and the third component 106. The rotating shaft 203 is coaxial with the fourth axis 304. In the front-back direction, the first slot 201 is located in front of the second slot 202. In the up-down direction, the first slot 201 is located below the second slot 202. When the tail plate 102 is in the initial position, the rotating shaft 203 is disposed in the first slot 201. When the tail plate 102 is in the backward position, the rotating shaft 203 is disposed in the second slot 202. The first slot 201 and the second slot 202 can support the connection position between the third component 106 and the tailplate 102, i.e., the rotating shaft 203, improving the overall structural stability of the chassis assembly 100 when the tailplate 102 is in the initial position and the rearward position. Furthermore, the second slot 202 is located above and behind the first slot 201, allowing the rotating shaft 203 to move backward, thereby causing the fourth axis 304 to move backward. Figure 5 As shown in the changes, the lifting effect of the front end of the seat cushion 101 is improved.

[0029] refer to Figures 1 to 4In some embodiments of the present invention, the second transmission mechanism 107 includes a linkage module 109, and the driven member 108 is connected to the tail plate 102 through the linkage module 109. The linkage module 109 has a fifth axis 305, a sixth axis 306, and a seventh axis 307 that are parallel to each other. The linkage module 109 includes a first link 110 and a second link 111. The two ends of the first link 110 are rotatably connected to the tail plate 102 and the second link 111. The second link 111 is rotatably connected to the first component 104 and the driven member 108. The second link 111 can rotate relative to the first link 110 about the fifth axis 305. 1. The first component 104 can rotate about the sixth axis 306, and the second link 111 can rotate about the seventh axis 307 relative to the driven component 108. In the vertical direction, the sixth axis 306 is located between the fifth axis 305 and the seventh axis 307, and the fifth axis 305 is located below the sixth axis 306. When the tail plate 102 is in the initial position, in the front-back direction, the fifth axis 305 is located in front of the seventh axis 307. When the tail plate 102 rotates from the initial position to the rearward position, the tail plate 102 drives the first link 110 to move, so that the fifth axis 305 moves backward, thereby causing the seventh axis 307 to move forward. The linkage module 109 operates on the principle that the center of the second linkage 111 is rotatably connected to the fixed first component 104 (sixth axis 306). Its lower end (fifth axis 305) is connected to the tailplate 102 via the first linkage 110, and its upper end (seventh axis 307) is connected to the seat cushion 101 via the driven member 108. The second linkage 111 forms a vertically distributed swing arm. Therefore, when the lower end rotates backward (the tailplate 102 rotates backward, and the lower end of the second linkage 111 is pulled backward by the first linkage 110), the upper end rotates forward, effectively pushing the seat cushion 101. The linkage structure provides smooth transmission and allows for adjustment of the linkage shape and hinge position according to the shape or layout space of other chassis components, exhibiting strong adaptability and a compact structure.

[0030] It should be noted that, in some embodiments, the second link 111 can be as follows: Figure 3 As shown, the driven member 108 is indirectly connected via the third link 112, or it can be directly connected to the driven member 108.

[0031] It should be noted that the reference Figure 3 and Figure 4 In some embodiments, the design of the first slot 201 and the second slot 202 also facilitates the tail plate 102 to pull the lower end of the second connecting rod 111 to rotate backward. When the tail plate 102 tilts backward, the tail plate 102 drives the first connecting rod 110 to move and locks the rotating shaft 203 in the second slot 202, which can further move the fifth axis 305 backward, thereby making the seat cushion 101 move forward better.

[0032] refer to Figures 2 to 4In some embodiments of the present invention, the first link 110 is rotatably connected to the rotating shaft 203, and the first link 110 can rotate relative to the tail plate 102 around the rotating shaft 203. Alternatively, the link module 109 includes a third link 112, the two ends of which are rotatably connected to the second link 111 and the driven member 108, respectively. The third link 112 can rotate relative to the second link 111 around the seventh axis 307. The rotatable connection of the first link 110 to the rotating shaft 203 simplifies the structure, reduces the number of rotating pairs on the tail plate 102, and does not affect the normal transmission of the first transmission mechanism 103 and the second transmission mechanism 107. The third link 112 is used to make the transmission process between the second link 111 and the driven member 108 smoother, and also to make the forward sliding of the driven member 108 relative to the third component 106 smoother, preventing jamming. (The last sentence appears to be incomplete and possibly refers to a different concept.) Figure 4 The rotation of the third link 112 also enhances the upward lifting effect of the seat cushion 101.

[0033] refer to Figure 2 , Figure 7 and Figure 8 In some embodiments of the present invention, the chassis assembly 100 includes a gear shift pin 204, and the tailgate 102 has a plurality of gear shift holes 205. The plurality of gear shift holes 205 are circumferentially spaced around a first axis 301. The gear shift pin 204 can be driven to be inserted into any of the gear shift holes 205 to restrict the tailgate 102 from rotating around the first axis 301. The gear shift structure allows for more angles of rearward tilting of the tailgate 102 and also improves the structural stability of each gear, preventing loosening. (Reference) Figure 2 and Figure 7 In some embodiments, the front end of the tailgate 102 is provided with a plurality of gear holes 205 for cooperating with gear pins 204, and the rear end of the tailgate 102 is provided with a protrusion that protrudes outward relative to the first transmission mechanism 103. This protrusion is beneficial for connecting components such as the back beam, improving the adaptability of the chassis assembly 100, and enabling it to adapt to more types of seats.

[0034] It should be noted that in some embodiments, the control of the gear shift pin 204 can be either... Figure 2 , Figure 8 The manual control shown can also be achieved by adding components such as handles to enable electric control. Further, refer to... Figure 2 and Figure 8 In some embodiments, a first elastic element 211 is also included. The elastic force of the first elastic element 211 can drive the gear pin 204 to automatically reset, improving the reciprocating user experience.

[0035] refer to Figure 6In some embodiments of the present invention, the second transmission mechanism 107 includes a gear module 601. The driven member 108 is connected to the tailplate 102 via the gear module 601. The gear module 601 includes a first gear 602 and a rack 603 connected in a transmission manner. The first gear 602 is fixedly connected to the tailplate 102, and the rack 603 is fixedly connected to the driven member 108. The first gear 602 and rack 603 are configured such that when the tailplate 102 rotates from its initial position to its tilted-back position, the rack 603 moves forward relative to the first gear 602, causing the driven member 108 to move forward. The gear module 601 provides a relatively smooth transmission process, improving the experience of the seat cushion 101 moving forward. There are several ways to connect the first gear 602 and the rack 603. They can be directly connected, with the teeth of the rack 603 positioned below the first gear 602. When the first gear 602 rotates backward, it pushes the rack 603 forward. The rack 603 is then connected to the driven member 108 through other components, thereby driving the driven member 108 to move forward.

[0036] It should be noted that in some embodiments, the first gear 602 can be configured to be coaxial with the fourth axis 304, which can also simplify the structure and reduce the number of rotating pairs involved in the tail plate 102.

[0037] refer to Figure 6 In some embodiments of the present invention, the gear module 601 includes a compound gear 604. Along the left-right direction, both the first gear 602 and the rack 603 mesh with the compound gear 604. The compound gear 604 meshes in front of the first gear 602, and the rack 603 meshes above the compound gear 604. When the tail plate 102 drives the first gear 602 to rotate backward, the compound gear 604 is driven to rotate, causing the rack 603 to move forward. The specific process is as follows: When the first gear 602 rotates backward (… Figure 6 When the gear rotates clockwise, the compound gear 604 located in front of the first gear 602 will move in the opposite direction. Figure 6 The rack 603 moves forward due to the counter-clockwise rotation (i.e., forward rotation). The compound gear 604, through a pivoting mechanism, allows the rack 603 to be positioned above and the first gear 602 below, optimizing the internal structure of the chassis assembly 100 for a more compact and rational design.

[0038] It should be noted that the reference Figure 6 In some embodiments, the compound gear 604 includes a large gear and a small gear, which are arranged along the direction of each rotation axis 203. The small gear meshes with the first gear 602, and the large gear meshes with the rack 603, thus achieving the effect of extending the range and accelerating the speed, making the forward movement of the seat cushion 101 more obvious.

[0039] refer to Figure 2 and Figure 7In some embodiments of the present invention, the chassis assembly 100 includes a first elastic element 207, with its two ends connected to a first component 104 and a second component 105, respectively. When the second component 105 rotates backward relative to the first component 104, the elastic force of the first elastic element 207 drives the second component 105 to rotate forward relative to the first component 104. The first elastic element 207 achieves an automatic reset effect. After tilting backward, when the external force is removed, the first elastic element 207 will push the second component 105 to rotate forward relative to the first component 104, thereby resetting the tailgate 102. This restores both the first transmission mechanism 103 and the second transmission mechanism 107, restoring the forward and upward movement of the seat cushion 101 and improving the user experience.

[0040] It should be noted that the reference Figure 2 In some embodiments, the seat cushion 101 is slidably connected to the driven member 108. The chassis assembly 100 also includes a second elastic member 206, with its two ends connected to the seat cushion 101 and the driven member 108, respectively. When the seat cushion 101 moves forward relative to the driven member 108, the elastic force of the second elastic member 206 drives the seat cushion 101 to move backward. When the external force is removed, the second elastic member 206 can restore the forward movement of the seat cushion 101 relative to the driven member 108, improving the user experience. The slidable connection between the seat cushion 101 and the driven member 108 can further enhance the forward movement of the seat cushion 101, thereby preventing the center of gravity from being too far back.

[0041] refer to Figure 1 , Figure 2 and Figure 7 In some embodiments, the first component 104, the second component 105, and the third component 106 are all shell-shaped, thus forming a receiving cavity. Components such as the first elastic element 207 and the shift pin 204 can be disposed within the receiving cavity, improving the compactness of the structure. Furthermore, the first transmission mechanism 103 itself is formed as part of the seat chassis, improving aesthetics and reducing unnecessary transmission parts. The first component 104 can also have openings to connect to components such as the seat base.

[0042] refer to Figure 1 , Figure 2 and Figure 7In some embodiments of the present invention, the third component 106 has a guide groove 208 along the front-rear direction, the chassis assembly 100 includes a guide block 209, the guide block 209 is fixedly connected to the driven member 108 and slidably disposed in the guide groove 208, and / or the chassis assembly 100 includes a roller 210, the roller 210 is rotatably connected to the third component 106 and abuts against the driven member 108, and when the driven member 108 moves forward relative to the third component 106, the roller 210 rotates around its own axis. The cooperation of the guide groove 208 and the guide block 209 enables the driven member 108 to move forward more accurately, preventing the seat cushion 101 from shifting to the left or right sides, while the roller 210 can reduce the friction between the driven member 108 and the third component 106, improving the service life of the components.

[0043] According to a second aspect embodiment of the present invention, a seat includes a backrest and a chassis assembly 100 as described in any of the first aspect embodiments. The backrest is connected to a tailplate 102. When the backrest is driven to rotate backward, the tailplate 102 can rotate from an initial position to a reclining position. A first transmission mechanism 103 and the tailplate 102 form a planar four-bar linkage. By designing the position of each rotating joint of the tailplate 102 in the initial position, when the tailplate 102 rotates backward, the third axis 303 at the upper end of the second component 105 moves backward, and the distance relative to the second axis 302 in the vertical direction increases, achieving the technical effect of the front end of the seat cushion 101 tilting upward. The tailplate 102 is also connected to a second transmission mechanism 107. When the tailplate 102 rotates backward, the driven member 108 in the second transmission mechanism 107 drives the seat cushion 101 to move forward. The tailgate 102 is connected to the backrest. When the user leans back, the tailgate 102 can be driven, realizing the linkage between the seat cushion 101 and the backrest. The rotation of the tailgate 102 can make the seat cushion 101 move forward and the front end tilt upward, which not only avoids excessive backward shift of the center of gravity and improves safety and stability, but also supports the user's legs with the tilted front end of the seat, improving the user experience and safety performance of the seat.

[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A chassis assembly, characterized in that, include: cushion; Tail plate, the tail plate being used to connect to the back beam; A first transmission mechanism has three parallel axes: a first axis, a second axis, a third axis, and a fourth axis. It includes a first component, a second component, and a third component rotatably connected in sequence. A tailplate is rotatably connected to the first component and the third component. The tailplate can rotate relative to the first component around the first axis, the first component can rotate relative to the second component around the second axis, the second component can rotate relative to the third component around the third axis, and the third component can rotate relative to the tailplate around the fourth axis. The third component is located above the first component, and the tailplate is located behind the second component. The second transmission mechanism includes a driven member, the seat cushion is connected to the driven member, the driven member is slidably connected to the third component, and the driven member is drivingly connected to the tail plate; The tail plate can rotate about the first axis to be in an initial position and a rearward position. When the tail plate is in the initial position, the third axis is located in front of the second axis in the forward and backward direction. When the tail plate rotates from the initial position to the tilting position, the fourth axis rotates backward relative to the first axis, and the tail plate drives the third component to move so that the third axis moves backward relative to the second axis, increasing the vertical distance between the second axis and the third axis; the tail plate drives the driven member to move so that the driven member slides forward relative to the third component.

2. The chassis assembly according to claim 1, characterized in that, The first component has a first slot and a second slot on the side facing the third component. The first transmission mechanism includes a rotating shaft that rotatably connects the tail plate and the third component. The rotating shaft is coaxial with the fourth axis. In the front-back direction, the first slot is located in front of the second slot. In the up-down direction, the first slot is located below the second slot. When the tail plate is in the initial position, the rotating shaft is located in the first slot. When the tail plate is in the backward position, the rotating shaft is located in the second slot.

3. The chassis assembly according to claim 2, characterized in that, The second transmission mechanism includes a linkage module. The driven member is connected to the tail plate through the linkage module. The linkage module has a fifth axis, a sixth axis, and a seventh axis that are parallel to each other. The linkage module includes a first link and a second link. The two ends of the first link are rotatably connected to the tail plate and the second link. The second link is rotatably connected to the first component and the driven member. The second link can rotate relative to the first link around the fifth axis. The second link can rotate relative to the first component around the sixth axis. The second link can rotate relative to the driven member around the seventh axis. In the vertical direction, the sixth axis is located between the fifth axis and the seventh axis, and the fifth axis is located below the sixth axis. When the tail plate is in the initial position, in the front-rear direction, the fifth axis is located in front of the seventh axis. When the tail plate rotates from the initial position to the backward position, the tail plate drives the first link to move, so that the fifth axis moves backward, thereby causing the seventh axis to move forward.

4. The chassis assembly according to claim 3, characterized in that, The first link is rotatably connected to the rotating shaft, and the first link can rotate relative to the tail plate around the rotating shaft. And / or, the link module includes a third link, the two ends of the third link are rotatably connected to the second link and the driven member respectively, and the third link can rotate relative to the second link around the seventh axis.

5. The chassis assembly according to claim 1, characterized in that, The chassis assembly includes a gear shift pin, and the tail plate has multiple gear shift holes. The multiple gear shift holes are circumferentially spaced around the first axis. The gear shift pin can be driven and inserted into any of the gear shift holes to restrict the tail plate from rotating around the first axis.

6. The chassis assembly according to claim 1, characterized in that, The second transmission mechanism includes a gear module, and the driven member is connected to the tail plate through the gear module. The gear module includes a first gear and a rack that are connected in transmission. The first gear is fixedly connected to the tail plate, and the rack is fixedly connected to the driven member. The first gear and the rack are configured such that when the tail plate rotates from the initial position to the backward position, the rack moves forward relative to the first gear, so that the driven member moves forward.

7. The chassis assembly according to claim 6, characterized in that, The gear module includes a compound gear. In the left-right direction, both the first gear and the rack mesh with the compound gear. The compound gear meshes in front of the first gear, and the rack meshes above the compound gear. When the tail plate drives the first gear to rotate backward, the compound gear is driven to rotate so that the rack moves forward.

8. The chassis assembly according to claim 1, characterized in that, The chassis assembly includes a first elastic element, with its two ends connected to a first component and a second component, respectively. When the second component rotates backward relative to the first component, the elastic force of the first elastic element is used to drive the second component to rotate forward relative to the first component.

9. The chassis assembly according to claim 1, characterized in that, The third component has a guide groove along the front-rear direction. The chassis assembly includes a guide block, which is fixedly connected to the driven member and slidably disposed in the guide groove. And / or, the chassis assembly includes a roller, which is rotatably connected to the third component and abuts against the driven member. When the driven member moves forward relative to the third component, the roller rotates around its own axis.

10. A seat, characterized in that, The system includes a back beam and a chassis assembly according to any one of claims 1 to 9, wherein the back beam is connected to the tail plate, and the tail plate can rotate from the initial position to the rearward tilt position when the back beam is driven to rotate rearward.

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