Seat mechanism and carrier

Abstract

The utility model discloses a seat mechanism and a carrier. The seat mechanism comprises a seat and a backrest capable of rotating relative to the seat, the seat defines a first plane for supporting thighs of an occupant, and the backrest defines a second plane for supporting the back of the occupant. The seat mechanism has a sitting posture state, a lying posture state and a zero-gravity state between the sitting posture state and the lying posture state, and the included angle between the first plane and the second plane in the zero-gravity state is larger than the included angle between the first plane and the second plane in the sitting posture state and smaller than the included angle between the first plane and the second plane in the lying posture state; in the zero-gravity state, the front portion of the seat is higher than the rear portion of the seat, a first included angle larger than zero is formed between the first plane and the horizontal plane, and a second included angle larger than zero is formed between the second plane and the horizontal plane, so that the heart and the knees of the sitter are located at the same height. The seat mechanism and the carrier have the zero-gravity state, and the optimal comfort can be provided in the zero-gravity state.

Description

Technical Field

[0001] This utility model relates to a seating mechanism and a carrier, such as a stroller. Background Technology

[0002] The seating mechanism is an essential component of child vehicles such as strollers and car seats. A common seating mechanism includes a seat and a backrest. The seat supports the child's hips and thighs, while the backrest supports the child's back. To improve comfort, some seating mechanisms incorporate adjustment mechanisms between the seat and backrest, allowing for angle adjustments and enabling posture changes such as sitting, semi-reclining, and lying down. For semi-reclining seating, the angles of the seat and backrest, as well as the overall angle between them, have a crucial impact on comfort.

[0003] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] This utility model relates to a seating mechanism and vehicle, which has a sitting position, a lying position and a zero-gravity position, and is comfortable to ride in, especially with the best comfort in the zero-gravity position.

[0005] A first aspect of the present invention provides a seating mechanism including a seat and a backrest rotatable relative to the seat, the seat defining a first plane for supporting the thighs of a occupant and the backrest defining a second plane for supporting the back of a occupant.

[0006] The seating mechanism has at least three usage states, including a sitting state, a reclining state, and a zero-gravity state between the sitting and reclining states. In the zero-gravity state, the angle between the first plane and the second plane is greater than the angle between the first plane and the second plane in the sitting state and less than the angle between the first plane and the second plane in the reclining state. In the zero-gravity state, the front of the seat is higher than its rear, the first plane has a first angle greater than zero relative to the horizontal plane, and the second plane has a second angle greater than zero relative to the horizontal plane, so that the occupant's heart and knees are at the same height.

[0007] In some preferred embodiments, the seating mechanism includes a leg support that is rotatable relative to the seat, the leg support being located at the front of the seat and defining a third plane for supporting the occupant's lower legs, wherein, in the zero-gravity state, the lower end of the leg support is located at the front of its upper end, and the third plane has a third included angle greater than zero relative to the horizontal plane.

[0008] In some more preferred embodiments, the first included angle is 18 to 40 degrees, the second included angle is 35 to 55 degrees, and the third included angle is 26 to 40 degrees.

[0009] In some further preferred embodiments, the first included angle is 25-35 degrees, the second included angle is 40-50 degrees, and the third included angle is 28-35 degrees.

[0010] In some preferred embodiments, the upper end of the leg support is rotatably connected to the front of the seat, and a leg support drive device is connected between the lower end of the backrest or between the seat and the leg support, so that the leg support rotates when the backrest or the seat rotates. In different usage states, as the backrest flips, the angle of the leg support can be automatically adjusted to provide corresponding support for the lower legs, further improving riding comfort.

[0011] In some alternative embodiments, the upper end of the leg support is connected to the front end of the seat via a rotary joint, allowing the leg support to rotate after the rotary joint is unlocked. In these embodiments, the angle of the leg support can be manually and freely adjusted to obtain the desired comfortable angle.

[0012] In some preferred embodiments, the lower end of the backrest is connected to the rear of the seat via a seat drive device, so that the seat rotates when the backrest rotates. Operating the backrest allows the seat mechanism to switch between multiple usage states, such as sitting, zero-gravity, and reclining, making the switching operation convenient.

[0013] In some preferred embodiments, the seating mechanism includes a connecting seat to which the rear portion of the seat is rotatably connected;

[0014] The seat drive device includes:

[0015] A backrest drive rod, wherein the backrest is rotatably connected to the connecting seat via the backrest drive rod;

[0016] A first drive rod has a first end rotatably connected to the backrest drive rod;

[0017] The second drive rod has a first end that is rotatably connected to the connecting seat;

[0018] The third drive rod has a first end rotatably connected to the seat;

[0019] The second end of the first drive rod, the second end of the second drive rod, and the second end of the third drive rod are rotatably connected to each other.

[0020] The seating mechanism further includes a first locking member having a locked state and an unlocked state. In the locked state, the first locking member connects at least two components of the backrest drive rod, the first drive rod, the second drive rod, the third drive rod, and the connecting seat to lock the seating drive device, thereby stabilizing the seating mechanism in the sitting state, the zero-gravity state, or the reclining state. In the unlocked state, the first locking member disengages from the at least two components to release the seating drive device, thereby allowing the backrest and the seat to rotate relative to each other.

[0021] In some preferred embodiments, the backrest drive rod includes:

[0022] An upper drive rod is fixedly connected to the lower end of the backrest or is integral with the backrest, and the upper drive rod is rotatably connected to the connecting seat;

[0023] The lower drive rod has a first end rotatably connected to the connecting seat and / or the upper drive rod and a second end rotatably connected to the first end of the first drive rod;

[0024] The seating mechanism further includes a second locking member having a locked state and an unlocked state. In the locked state, the second locking member connects the upper drive rod and the lower drive rod. In the unlocked state, the second locking member disengages from the upper drive rod and / or the lower drive rod to allow the upper drive rod to flip relative to the lower drive rod, thereby folding or unfolding the seating mechanism.

[0025] In some preferred embodiments, the seating mechanism further includes a leg support rotatable relative to the seat and a leg support drive device for driving the leg support to rotate, wherein the upper end of the leg support is rotatably connected to the front of the seat and defines a third plane for supporting the occupant's lower leg; the leg support drive device includes a fourth drive rod, the first end of the fourth drive rod being rotatably connected to the second drive rod or the third drive rod, and the second end of the fourth drive rod being rotatably connected to the leg support.

[0026] In some preferred embodiments, the second end of the fourth drive rod is rotatably and slidably connected to the leg support, allowing the lower end of the leg support and the backrest to come closer together when the seat mechanism is folded.

[0027] In some preferred embodiments, the seating mechanism includes a base, and the seat includes a seat rod rotatably connected to the base;

[0028] The seat drive device includes a backrest link connected to the backrest, and the backrest link is rotatably connected to the base;

[0029] The seat rod and the backrest link are slidably and rotatably connected so that the seat rod rotates when the backrest link rotates with the backrest, thereby changing the use state of the seat mechanism.

[0030] In some preferred embodiments, the seat rod is provided with a track groove, and the backrest connecting rod is provided with an adjusting pin. The adjusting pin is slidably inserted into the track groove to connect the seat rod and the backrest connecting rod. The track groove has a front end, a rear end, and a corner portion located between the front end and the rear end. The corner portion is located behind the front end and above the rear end. When the seat mechanism is in a reclining position, the adjusting pin is located in the front end. When the seat mechanism is in a zero-gravity state, the adjusting pin is located in the corner portion. When the seat mechanism is in a sitting position, the adjusting pin is located in the rear end.

[0031] In some preferred embodiments, the seat mechanism further includes a third locking member movably disposed on the backrest link. The base is provided with a plurality of locking slots arranged sequentially along the outer periphery of the base. When the seat mechanism is in any use state, the third locking member is inserted into one of the locking slots. When the third locking member is disengaged from each of the locking slots, the seat mechanism is allowed to switch use states.

[0032] In some preferred embodiments, the seating mechanism further includes a leg support rotatable relative to the seat and a leg support drive for rotating the leg support, the upper end of the leg support being rotatably connected to the front of the seat and defining a third plane for supporting the occupant's lower legs.

[0033] The leg support drive device includes:

[0034] The first push rod has a first end rotatably connected to the backrest link;

[0035] The second push rod has a first end that is rotatably connected to the second end of the first push rod;

[0036] The third push rod has a first end that is rotatably connected to the second end of the second push rod;

[0037] The second end of the third push rod is rotatably connected to the leg support.

[0038] In some further preferred embodiments, the second push rod is slidably disposed on the seat in a back-and-forth direction.

[0039] In some further preferred embodiments, the second end of the third push rod is slidable relative to the leg support to allow the lower end of the leg support and the backrest to come closer together when the seat mechanism is folded.

[0040] In some preferred embodiments, the third locking member is slidably mounted on the backrest, the backrest link having a groove, the third locking member being inserted into the groove and one of the locking slots in any of the said use states, the third locking member also having a position disengaged from the groove and each of the locking slots to allow the backrest to flip relative to the backrest link, thereby folding or unfolding the seat mechanism.

[0041] In some preferred embodiments, the seat drive device includes a fixed seat, a first connecting portion of the backrest rotatably connected to the fixed seat, the seat slidably disposed on the fixed seat, and a second connecting portion of the backrest rotatably connected to the seat, the second connecting portion and the first connecting portion being spaced apart; one of the fixed seat and the seat is provided with a guide groove, and the other is provided with a guide block, the guide groove having a front end, a rear end, and a corner portion located between the front end and the rear end, the corner portion being higher than the front end and the rear end; when the seat mechanism is in a reclining state, the guide block is located in the front end; when the seat mechanism is in a zero-gravity state, the guide block is located in the corner portion; and when the seat mechanism is in a sitting state, the guide block is located in the rear end.

[0042] In some preferred embodiments, the seating mechanism further includes a leg support rotatable relative to the seat and a leg support drive for rotating the leg support, the leg support defining a third plane for supporting the occupant's lower legs.

[0043] In some preferred embodiments, the upper end of the leg support is rotatably connected to the front of the seat, and the leg support drive device includes a linkage assembly that is rotatably connected to the second connecting part and the leg support. The linkage assembly includes a plurality of linkage rods that are rotatably connected to each other.

[0044] In some further preferred embodiments, the linkage assembly includes a first linkage rod rotatably connected to the leg support, a second linkage rod slidably connected to the seat in a front-back direction, and a third linkage rod rotatably connected to the backrest. The front ends of the first linkage rod and the second linkage rod are rotatably connected, and the rear end of the second linkage rod is rotatably connected to the third linkage rod.

[0045] In some further preferred embodiments, a locking element is provided between the backrest and the fixed seat, which allows the seating mechanism to switch between different usage states when the locking element is in an unlocked state.

[0046] In some preferred embodiments, the seating mechanism also has a folded state in which the backrest and the seat are close together.

[0047] In some preferred embodiments, in the sitting position, the angle between the first plane and the horizontal plane is smaller than the first angle, and the angle between the second plane and the horizontal plane is larger than the second angle; in the lying position, the angle between the first plane and the horizontal plane is smaller than the first angle, and the angle between the second plane and the horizontal plane is smaller than the second angle.

[0048] A second aspect of this invention provides a vehicle that includes the aforementioned seating mechanism.

[0049] In some preferred embodiments, the vehicle includes a stroller, which includes a frame and wheels disposed at the bottom of the frame, and the seating mechanism is removably or fixedly connected to the frame.

[0050] In some preferred embodiments, the vehicle includes a car safety seat, the seating mechanism being removably or fixedly attached to the base of the car safety seat.

[0051] The present invention adopts the above solution and has the following advantages:

[0052] The seat mechanism of this utility model has multiple usage states, including a zero-gravity state, in which the height of the passenger's heart and knees are basically the same. In this posture, the passenger has the best comfort and is easy to use, allowing the passenger to use the seat mechanism in various postures such as sitting, zero gravity, and lying down. Attached Figure Description

[0053] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a side view of a seating mechanism in a seated position according to Embodiment 1 of the present invention.

[0055] Figure 2 This is a side view of a seating mechanism according to Embodiment 1 of the present invention in a zero-gravity state.

[0056] Figure 3 This is a side view of a seating mechanism according to Embodiment 1 of the present invention in a reclining position.

[0057] Figure 4 This is a perspective view of a seating mechanism in a seated position according to Embodiment 1 of the present invention.

[0058] Figure 5 This is a perspective view of a seating mechanism according to Embodiment 1 of the present invention in a zero-gravity state.

[0059] Figure 6 This is a perspective view of a seating mechanism according to Embodiment 1 of the present invention in a reclining position.

[0060] Figure 7 This is a schematic diagram of the backrest and upper drive rod of a seat mechanism according to Embodiment 1 of the present invention.

[0061] Figure 8 This is a schematic diagram of the connecting seat and lower drive rod of a seat mechanism according to Embodiment 1 of the present utility model.

[0062] Figure 9 This is a side view of a seating mechanism according to Embodiment 1 of the present invention during the folding process.

[0063] Figure 10 This is a side view of a seat mechanism in a folded state according to Embodiment 1 of the present invention.

[0064] Figure 11 This is a perspective view of a vehicle according to Embodiment 1 of the present utility model.

[0065] Figure 12 This is a side view of a vehicle according to Embodiment 1 of the present invention, wherein the seating mechanism is in a seated position.

[0066] Figure 13 This is a side view of a vehicle according to Embodiment 1 of the present invention, wherein the seating mechanism is in a zero-gravity state.

[0067] Figure 14 This is a side view of a vehicle according to Embodiment 1 of the present invention, wherein the seating mechanism is in a reclining position.

[0068] Figure 15 This is a perspective view of a seating mechanism in a seated position according to Embodiment 2 of the present invention.

[0069] Figure 16 This is an exploded view of the seat, one side base, and backrest connecting rod according to Embodiment 2 of this utility model.

[0070] Figure 17 This is a structural diagram of the backrest and the third locking member according to Embodiment 2 of this utility model.

[0071] Figure 18 This is a perspective view of a seating mechanism according to Embodiment 2 of the present invention in a zero-gravity state.

[0072] Figure 19 This is a side view of a seating mechanism in a seated position according to Embodiment 2 of the present invention.

[0073] Figure 20 This is a side view of a seating mechanism according to Embodiment 2 of the present invention when it is in a zero-gravity state.

[0074] Figure 21 This is a side view of a seating mechanism in a reclining position according to Embodiment 2 of the present invention.

[0075] Figure 22 This is a side view of a seat mechanism in a folded state according to Embodiment 2 of the present invention.

[0076] Figure 23 This is a perspective view of a vehicle according to Embodiment 2 of the present invention.

[0077] Figure 24 This is a side view of a vehicle according to Embodiment 2 of the present invention, wherein the seating mechanism is in a seated position.

[0078] Figure 25 This is a side view of a vehicle according to Embodiment 2 of the present invention, wherein the seating mechanism is in a zero-gravity state.

[0079] Figure 26 This is a side view of a vehicle according to Embodiment 2 of the present invention, wherein the seating mechanism is in a reclining position.

[0080] Figure 27 This is a perspective view of a seating mechanism according to Embodiment 3 of the present invention.

[0081] Figure 28 This is an exploded view of a seating mechanism according to Embodiment 3 of the present invention.

[0082] Figure 29 This is a schematic diagram of a seating mechanism in a seated position according to Embodiment 3 of the present invention.

[0083] Figure 30 This is a schematic diagram of a seating mechanism according to Embodiment 3 of the present invention in a zero-gravity state.

[0084] Figure 31This is a schematic diagram of a seat mechanism in a reclining position according to Embodiment 3 of the present invention.

[0085] Figure 32 This is a schematic diagram of the position of a seat and guide block according to Embodiment 3 of the present invention, wherein the seat mechanism is in a seated position.

[0086] Figure 33 This is a schematic diagram of the position of a seat and guide block according to Embodiment 3 of the present invention, wherein the seat mechanism is in a zero-gravity state.

[0087] Figure 34 This is a schematic diagram of the position of a seat and guide block according to Embodiment 3 of the present invention, wherein the seat mechanism is in a reclining position.

[0088] Figure 35 This is a perspective view of a seating mechanism in a seated position according to Embodiment 4 of the present invention.

[0089] Figure 36 This is a perspective view of a seating mechanism according to Embodiment 4 of the present invention in a zero-gravity state.

[0090] Figure 37 This is a perspective view of a seating mechanism in a reclining position according to Embodiment 4 of the present invention.

[0091] Figure 38 This is a side view of a seating mechanism according to Embodiment 4 of the present invention in a zero-gravity state.

[0092] Figure 39 This is a schematic diagram of a seating mechanism according to Embodiment 4 of the present invention in a zero-gravity state.

[0093] Figure 40 This is an exploded view of a seating mechanism according to Embodiment 4 of the present invention in a zero-gravity state.

[0094] Figures 41 to 43 The following are schematic diagrams of a seating mechanism according to Embodiment 4 of the present invention in sitting, zero-gravity and lying positions, wherein the guide groove seat is not shown.

[0095] In the above attached figures,

[0096] 100. Seating mechanism; 200. Stroller; 201. Frame;

[0097] 1. Seat; 2. Backrest; 3. Leg support; 3a. Long slot; 4. Seat drive mechanism; 5. Leg support drive mechanism;

[0098] 11. Connecting seat; 111. First locking hole; 112. Second locking hole; 113. Third locking hole; 12. Seat rod; 13. Backrest drive rod; 131. Upper drive rod; 132. Lower drive rod; 132a. Fourth locking hole; 133. Limiting hole; 14. First drive rod; 15. Second drive rod; 16. Third drive rod; 17. First locking element; 18. Second locking element; 19. Fourth drive rod; 19a. Connecting pin;

[0099] 21. Base; 211. First locking groove; 212. Second locking groove; 213. Third locking groove; 22. Seat rod; 221. Track groove; 221a. Front end; 221b. Corner; 221c. Rear end; 222. Sliding sleeve; 23. Backrest connecting rod; 231. Adjusting pin; 232. Sliding groove; 24. Third locking element; 25. Backrest rod; 251. Mounting groove; 26. First push rod; 27. Second push rod; 28. Third push rod; 281. Connecting pin;

[0100] 30. Guide block; 31. Fixed seat; 32. Guide groove seat; 321. Guide groove; 321a. Front end; 321b. Corner part; 321c. Rear end; 33a. First connecting part; 33b. Second connecting part; 33c. Third connecting part; 34. Linkage assembly; 341. First linkage rod; 342. Second linkage rod; 343. Third linkage rod; 344. Fourth linkage rod; 345. First limiting groove; 346. Second limiting groove; 35. Rotating joint. Detailed Implementation

[0101] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0102] In this document, the terms “up,” “down,” “left,” “right,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings with the seating mechanism in a seated position. They are used only for the convenience of describing this application and simplifying the description, and are not intended to 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 limitations on this application.

[0103] Figures 1 to 43 The diagrams are drawn to scale. To keep the instructions concise, the proportions of each component are not listed individually. However, the proportions and positions of each component should be considered part of the contents of this instruction manual. Example

[0104] This embodiment provides a seating mechanism and carrier for carrying children, which can be a stroller, car seat, etc.

[0105] Reference Figures 1 to 10 As shown, the seating mechanism 100 mainly includes a seat 1 and a backrest 2. The seat 1 defines a first plane P1 for supporting the occupant's thighs, and the backrest 2 defines a second plane P2 for supporting the occupant's back. Figure 2 As shown. The seat 1 and backrest 2 can rotate relative to each other, so that the seat mechanism 100 has at least three usage states, including a sitting posture state (such as...). Figure 1 As shown), lying position (such as...) Figure 3 (as shown) and the zero-gravity state between sitting and lying positions (such as...) Figure 2 (As shown). In each usage state, the angle between seat 1 and backrest 2 (i.e., the angle between the first plane P1 and the second plane P2) is different to allow the occupant to use the seat in different postures; specifically, in zero gravity, the angle between the first plane P1 and the second plane P2 is greater than the angle between the first plane P1 and the second plane P2 in the sitting position and smaller than the angle between the first plane P1 and the second plane P2 in the reclining position. For example... Figure 2 As shown, in a zero-gravity state, the front of seat 1 is higher than its rear. The first plane P1 has a first angle α1 greater than zero relative to the horizontal plane, and the second plane P2 has a second angle α2 greater than zero relative to the horizontal plane. This ensures that the occupant's heart (position H1) and knees (position H2) are at the same height, providing optimal comfort. Both the first angle α1 and the second angle α2 are less than 90 degrees. The first angle α1 is 18–40 degrees, preferably 25–35 degrees. The second angle α2 is 35–55 degrees, preferably 40–50 degrees.

[0106] like Figure 1 As shown, in the seated position, the angle between the first plane P1 and the horizontal plane is less than the first angle α1, and the angle between the second plane P2 and the horizontal plane is greater than the second angle α2. That is, in the seated position, the seat 1 is generally horizontal, or tilted at a small angle (less than the first angle α1, which can be between 0 and 10 degrees) so that the front of the seat 1 is slightly higher than the back; the backrest 2 forms a larger angle with the horizontal plane (greater than the second angle α2, which can be between 90 and 80 degrees). Figure 3 As shown, in the lying position, the angle between the first plane P1 and the horizontal plane is greater than the first angle α1, and the angle between the second plane P2 and the horizontal plane is less than the second angle α2. That is, in the lying position, the seat 1 is generally horizontal, or tilted at a small angle (less than the first angle α1, which can be between 0 and 10 degrees) so that the front of the seat 1 is slightly higher than the back; the backrest 2 forms a small angle with the horizontal plane (less than the second angle α2, which can be between 0 and 20 degrees).

[0107] Furthermore, the seating mechanism 100 includes a leg support 3, which is rotatable relative to the seat 1, thus having different tilt angles in different usage states. The leg support 3 is located at the front of the seat 1 and defines a third plane P3 for supporting the occupant's lower legs. In a zero-gravity state, the lower end of the leg support 3 is located in front of its upper end, and the third plane P3 has a third included angle α3 greater than zero relative to the horizontal plane, which is less than 90 degrees. The third included angle α3 is 26~40 degrees, preferably 28~35 degrees. Figure 2 In the specific example shown, the first included angle α1 is 30 degrees, the second included angle α2 is 45 degrees, and the third included angle α3 is 31 degrees; the included angle between the seat 1 on the first plane P1 and the backrest 2 on the second plane P2 is approximately 105 degrees.

[0108] In the Figure 1 The sitting posture shown will be converted sequentially. Figure 2 The zero gravity state shown and Figure 3 In the lying position shown, the first included angle α1 first increases and then decreases, the second included angle α2 decreases in sequence, the third included angle α3 decreases in sequence, and the included angle between the seat 1 on the first plane P1 and the backrest 2 on the second plane P2 increases in sequence.

[0109] Furthermore, the seating mechanism 100 also has a folded state, in which the backrest 2 and seat 1 are close together. When unfolded, the seating mechanism 100 can be used in any configuration, such as... Figure 1 The sitting posture shown Figure 2 The zero-gravity state shown Figure 3 The lying position shown.

[0110] The lower end of the backrest 2 is connected to the rear of the seat 1 via a seat drive device 4, so that the seat 1 rotates when the backrest 2 rotates. In this embodiment, the upper end of the leg support 3 is rotatably connected to the front end of the seat 1, and a leg support drive device 5 is connected between the lower end of the backrest 2 or between the seat 1 and the leg support 3, so that the leg support 3 rotates when the backrest 2 or the seat 1 rotates. The structure and driving principle of the seat drive device 4 and the leg support drive device 5 in this embodiment will be described in detail below.

[0111] The seating mechanism 100 includes a connecting seat 11, which fixes the seating mechanism 100 to a support part of a vehicle (e.g., a trolley frame, a car seat base, etc.) or has an interface for connecting to the support part of the vehicle. The rear of the seat 1 is rotatably connected to the connecting seat 11; in this embodiment, the seat 1 includes two seat rods 12 extending forward and backward, specifically, the rear ends of the seat rods 12 are pivotally connected to the connecting seat 11. The aforementioned seat driving device 4 includes a backrest driving rod 13, a first driving rod 14, a second driving rod 15, and a third driving rod 16. The backrest 2 is rotatably connected to the connecting seat 11 via the backrest driving rod 13, and the upper part of the backrest driving rod 13 is fixedly connected to or integral with the backrest 2. The first end of the first drive rod 14 is rotatably connected to the backrest drive rod 13, the first end of the second drive rod 15 is rotatably connected to the connecting seat 11, and the first end of the third drive rod 16 is rotatably connected to the seat rod 12 of the seat 1. The second ends of the first drive rod 14, the second end of the second drive rod 15, and the second end of the third drive rod 16 are rotatably connected. In this embodiment, the drive rods are pivotally connected, and the second ends of the first drive rod 14, the second end of the second drive rod 15, and the second end of the third drive rod 16 are pivotally connected. The seat rod 12, the backrest drive rod 13, the first drive rod 14, and the third drive rod 16 form a four-bar linkage. When the backrest 2 is pressed and the backrest drive rod 13 flips, the four-bar linkage deforms. Simultaneously, the second drive rod 15 connected to the connecting seat 11 limits the movement, allowing the seat 1 to change angles within a set range as the backrest 2 flips, thus achieving posture conversion.

[0112] The seating mechanism 100 also includes a first locking member 17 having a locked state and an unlocked state. In the locked state, the first locking member 17 connects at least two of the following components: the connecting seat 11, the backrest drive rod 13, the first drive rod 14, the second drive rod 15, the third drive rod 16, and the connecting seat 11, to lock the seat drive device 4 and thereby stabilize the seating mechanism 100 in a sitting, zero-gravity, or reclining state. In the unlocked state, the first locking member 17 disengages from at least two components to release the seat drive device 4, thereby allowing the backrest 2 and the seat 1 to rotate relative to each other.

[0113] Furthermore, combined Figure 7 and Figure 8As shown, the backrest drive rod 13 includes an upper drive rod 131 and a lower drive rod 132. The upper drive rod 131 is fixedly connected to the lower end of the backrest 2 or is integral with the backrest 2, and is rotatably connected to the connecting seat 11. The first end of the lower drive rod 132 is rotatably connected to the connecting seat 11 or the first end of the upper drive rod 131, and the second end of the lower drive rod 132 is rotatably connected to the first end of the first drive rod 14. Specifically, in this embodiment, one end of the upper drive rod 131 and the first end of the lower drive rod 132 are rotatably connected to the connecting seat 11 via the same pivot. The seat mechanism 100 also includes a second locking member 18. The second locking member 18 has a locked state and an unlocked state. In the locked state, the second locking member 18 connects the upper drive rod 131 and the lower drive rod 132. In the unlocked state, the second locking member 18 disengages from the upper drive rod 131 and / or the lower drive rod 132 to allow the upper drive rod 131 to flip relative to the lower drive rod 132, thereby folding or unfolding the seat mechanism 100. It should also be noted that, in the locked state, the second locking member 18 is offset from the rotational connection point of the upper drive rod 131 and the lower drive rod 132.

[0114] Specifically, in this embodiment, in the locked state, the first locking member 17 connects the lower drive rod 132 of the backrest drive rod 13 and the connecting seat 11 to lock the backrest drive rod 13 and the connecting seat 11. The backrest drive rod 13 cannot rotate relative to the connecting seat 11, thereby stabilizing the seat mechanism 100 in a sitting, zero-gravity, or reclining state. In the unlocked state, the first locking member 17 disengages from the lower drive rod 132 and / or the connecting seat 11, allowing them to rotate relative to each other. The seat 1 drive mechanism is released, thereby allowing the aforementioned four-bar linkage to deform, and the seat 1 and backrest 2 can rotate relative to each other. Figures 1 to 10 In the specific example shown, the first locking element 17 includes a locking pin; see reference Figure 8 The connecting seat 11 is provided with a first locking hole 111, a second locking hole 112 and a third locking hole 113. The first locking hole 111, the second locking hole 112 and the third locking hole 113 are arranged along the arc-shaped path of the lower drive rod 132 rotating relative to the connecting seat 11. Figure 8 The circular path (shown by the dashed line) is arranged sequentially at intervals, and the lower drive rod 132 is provided with a fourth locking hole 132a. When the seat mechanism 100 is in a seated position, the fourth locking hole 132a and the first locking hole 111 are aligned and connected. The first locking member 17 is inserted into the fourth locking hole 132a and the first locking hole 111 to lock the upper drive rod 131 relative to the connecting seat 11, thereby locking the seat mechanism 100 in a seated position. Figure 4As shown. When the seat mechanism 100 is in a zero-gravity state, the fourth locking hole 132a and the second locking hole 112 are aligned and connected. The first locking member 17 is inserted into the fourth locking hole 132a and the second locking hole 112 to lock the upper drive rod 131 relative to the connecting seat 11, thereby locking the seat mechanism 100 in a zero-gravity state, as shown. Figure 5 As shown. When the seat mechanism 100 is in a reclining position, the fourth locking hole 132a and the third locking hole 113 are aligned and connected. The first locking member 17 is inserted into the fourth locking hole 132a and the third locking hole 113 to lock the upper drive rod 131 relative to the connecting seat 11, thereby locking the seat mechanism 100 in a reclining position, as shown. Figure 6 As shown.

[0115] like Figure 7 and Figure 8 As shown, the second locking member 18 includes a limiting pin. Limiting holes 133 are respectively provided on the upper drive rod 131 and the lower drive rod 132. When the limiting holes 133 on the upper drive rod 131 and the lower drive rod 132 are aligned and connected, the second locking member 18 is inserted into the two limiting holes 133, locking the upper drive rod 131 and the lower drive rod 132 into one unit, preventing relative rotation. At this time, the seat mechanism 100 can be in any usage state. Preferably, when the second locking member 18 locks the upper drive rod 131 and the lower drive rod 132 together, the center lines of the upper drive rod 131 and the lower drive rod 132 are collinear or parallel. When the seat mechanism 100 needs to be folded, the second locking member 18 is pulled out from the limiting holes 133 of the upper drive rod 131 and / or the lower drive rod 132, unlocking the upper drive rod 131 and the lower drive rod 132, allowing relative rotation.

[0116] The upper end of the leg support 3 is rotatably connected to the front end of the seat rod 12. The leg support drive device 5 includes a fourth drive rod 19, the first end of which is rotatably connected to a second drive rod 15 or a third drive rod 16, and the second end of which is rotatably connected to the leg support 3. Figures 4 to 6 As shown, the first end of the fourth drive rod 19 is pivotally connected between the first and second ends of the third drive rod 16. When the four-bar linkage of the seat drive device 4 deforms, the fourth drive rod 19 flips, pushing the leg support 3 to flip upward relative to the seat rod 12.

[0117] Furthermore, the second end of the fourth drive rod 19 can also slide relative to the leg support 3, allowing the lower end of the leg support 3 and the backrest 2 to come closer together after the seat mechanism 100 is folded. Figure 9 and Figure 10As shown. Specifically, the leg support 3 has an elongated groove 3a that extends along the centerline of the leg support 3. The second end of the fourth drive rod 19 has a connecting pin 19a, which is inserted into the elongated groove 3a and configured to rotate within and slide along the groove 3a. When the seat mechanism 100 changes from a seated state to a folded state, the connecting pin 19a first slides from the lower end of the elongated groove 3a to its upper end, as shown. Figure 9 As shown; then, the leg support 3 is flipped upward so that it is closer to the backrest 2, reducing the thickness of the seat mechanism 100 after folding. During this process, the connecting pin 19a slides forward from the upper end of the long groove 3a to its lower end, at which point the upper end of the long groove 3a can be basically level with its lower end.

[0118] This embodiment also provides a vehicle 200, which can be used as a vehicle 200 Figures 11 to 14 The stroller shown. (Refer to...) Figures 11 to 14 As shown, the stroller includes a frame 201 and wheels located at the bottom of the frame 201. The frame 201 has an interface, and the connecting seat 11 of the seat mechanism 100 can be removably or fixedly connected to the interface. The frame 201 has an unfolded state and a folded state. The seat mechanism 100 can be unfolded and folded on the frame 201, and when unfolded, it has three usage states: sitting, zero gravity, and lying down, as shown respectively. Figure 12 , Figure 13 and Figure 14 As shown.

[0119] The process by which the seating mechanism 100 switches between the three usage states is as follows:

[0120] When the seat mechanism 100 is in a seated position, the second locking member 18 is kept in its locked state. The first locking member 17 is pulled out from the second locking hole 112 of the lower drive rod 132 and / or the first locking hole 111 of the connecting seat 11 to unlock the seat drive device 4. The backrest 2 is pressed down, the four-bar linkage of the seat drive device 4 is deformed, the seat rod 12 flips and its front part is raised. At the same time, the fourth drive rod 19 pushes the leg support 3 to flip upward. After the fourth locking hole 132a on the lower drive rod 132 moves to be aligned with the second locking hole 112 of the connecting seat 11, the first locking member 17 is inserted into the fourth locking hole 132a and the second locking hole 112 to lock the seat mechanism 100 in a zero-gravity state, realizing the transition from the seated state to the zero-gravity state. The transition from a sitting or zero-gravity state to a lying position is similar to the aforementioned process, except that after the fourth lock hole 132a and the third lock hole 113 on the connecting seat 11 are aligned, the first locking member 17 is then inserted into the fourth lock hole 132a and the third lock hole 113.

[0121] When the seat mechanism 100 is in a reclining position, the second locking member 18 is kept in its locked state. The first locking member 17 is pulled out from the second locking hole 112 of the lower drive rod 132 and / or the third locking hole 113 of the connecting seat 11 to unlock the seat drive device 4. The backrest 2 is pushed upward, the four-bar linkage of the seat drive device 4 is deformed, the seat rod 12 is flipped, and its front part is flipped downward. At the same time, the fourth drive rod 19 pulls the leg support 3 to flip downward. After the fourth locking hole 132a on the lower drive rod 132 moves to be aligned with the second locking hole 112 of the connecting seat 11, the first locking member 17 is inserted into the fourth locking hole 132a and the second locking hole 112 to lock the seat mechanism 100 in a zero-gravity state, realizing the transition from the reclining state to the zero-gravity state. The process of transitioning from a lying or zero-gravity state to a sitting state is similar to the aforementioned process, except that after the fourth lock hole 132a and the first lock hole 111 on the connecting seat 11 are aligned, the first locking member 17 is then inserted into the fourth lock hole 132a and the first lock hole 111.

[0122] The folding process of the seat mechanism 100 is as follows:

[0123] With the seat mechanism 100 in a seated position, pull the second locking member 18 out of the limiting hole 133 of the upper drive rod 131 and / or lower drive rod 132, unlocking the backrest drive rod 13. Push the backrest 2 forward to bring it closer to the seat 1. Figure 9 The state shown is as follows. The leg support 3 is flipped upwards, bringing its lower end closer to the backrest 2, ultimately transforming it into the position shown. Figure 10 The folded state shown.

[0124] The seating mechanism 100 has the following advantages: it has multiple usage states, including a zero-gravity state, in which the height of the occupant's heart and knees is basically the same, providing optimal comfort and ease of use, allowing children in the seating mechanism 100 to adopt various postures; the backrest 2 allows the seating mechanism 100 to switch between multiple usage states such as sitting, zero-gravity, and reclining, and the switching operation is convenient; the angle of the leg support 3 also automatically changes accordingly in different usage states, providing corresponding support for the lower legs, further improving seating comfort and ease of use. Example

[0125] This embodiment provides a Figures 15 to 22 The diagram shows a seating mechanism 100 and a vehicle for carrying a child, which can be a stroller, car seat, etc. The vehicle 200 can be... Figures 23 to 26 The stroller shown.

[0126] Reference Figures 15 to 22As shown, similar to Embodiment 1, the seating mechanism 100 mainly includes a seat 1, a backrest 2, and a leg support 3. The seat 1 defines a first plane P1 for supporting the occupant's thighs, and the backrest 2 defines a second plane P2 for supporting the occupant's back. The leg support 3 is located in front of the seat 1 and defines a third plane P3 for supporting the occupant's lower legs, as shown. Figure 20 As shown. The seat 1 and backrest 2 can rotate relative to each other, and the leg support 3 can rotate relative to the seat 1, so that the seat mechanism 100 has at least three usage states, including a sitting posture (e.g., Figure 19 As shown), lying position (such as...) Figure 21 (as shown) and the zero-gravity state between sitting and lying positions (such as...) Figure 20 As shown). Figure 20 As shown, in a zero-gravity state, the front end of seat 1 is higher than its rear end. The first plane P1 has a first angle α1 greater than zero relative to the horizontal plane, the second plane P2 has a second angle α2 greater than zero relative to the horizontal plane, and the third plane P3 has a third angle α3 greater than zero relative to the horizontal plane. This arrangement ensures that the occupant's heart (position H1) and knees (position H2) are at the same height, providing optimal comfort. The first angle α1, second angle α2, and third angle α3 are all less than 90 degrees. The first angle α1 is 18-40 degrees, preferably 25-35 degrees. The second angle α2 is 35-55 degrees, preferably 40-50 degrees. The third angle α3 is 26-40 degrees, preferably 28-35 degrees. Figure 20 In the specific example shown, the first included angle α1 is 30 degrees, the second included angle α2 is 45 degrees, and the third included angle α3 is 31 degrees; the included angle between the seat 1 on the first plane P1 and the backrest 2 on the second plane P2 is approximately 105 degrees.

[0127] In the Figure 19 The sitting posture shown will be converted sequentially. Figure 20 The zero gravity state shown and Figure 21 In the lying position shown, the first included angle α1 first increases and then decreases, the second included angle α2 decreases successively, the third included angle α3 decreases successively, and the included angle between the seat 1 on the first plane P1 and the backrest 2 on the second plane P2 increases successively.

[0128] The lower end of the backrest 2 is connected to the rear of the seat 1 via a seat drive device 4, so that the seat 1 rotates when the backrest 2 rotates. In this embodiment, the upper end of the leg support 3 is rotatably connected to the front end of the seat 1, and a leg support drive device 5 is connected between the lower end of the backrest 2 or between the seat 1 and the leg support 3, so that the leg support 3 rotates when the backrest 2 or the seat 1 rotates. The main difference between this embodiment and embodiment 1 is that the seat drive device 4 and the leg support drive device 5 are different. The structure and driving principle of the seat drive device 4 and the leg support drive device 5 in this embodiment will be described in detail below.

[0129] The seating mechanism 100 includes a base 21, which is part of or detachably connected to the support portion of the vehicle 200 (e.g., the frame 201 of a trolley, the base of a car seat, etc.) to mount the seating mechanism 100 onto the support portion of the vehicle 200. The seat 1 includes a seat post 22, which is rotatably connected to the base 21. Figures 19 to 21 As shown, the rear end of the seat rod 22 is rotatably connected to the base 21 via pivot a1. The seat drive device 4 includes a backrest link 23, and the backrest 2 includes backrest rods 25 located on the left and right sides of the backrest 2. The backrest link 23 is connected to the lower end of the backrest rods 25 and is rotatably connected to the base 21. Figures 19 to 21 As shown, the lower end of the backrest link 23 is rotatably connected to the base 21 via pivot a2. The seat rod 22 and the backrest link 23 are slidably and rotatably connected so that when the backrest link 23 rotates with the backrest 2, it drives the seat rod 22 to rotate, thereby changing the usage state of the seat mechanism 100. Specifically, as shown... Figure 16 , Figures 19 to 21 As shown, the seat rod 22 has a track groove 221, and the backrest connecting rod 23 has an adjusting pin 231. The adjusting pin 231 is slidably inserted into the track groove 221, and the seat rod 22 and the backrest connecting rod 23 are rotatably and slidably connected only by the adjusting pin 231. When the backrest 2 rotates, the adjusting pin 231 can slide along the track groove 221, thereby allowing the backrest 2 and the seat 1 to rotate relative to each other. It should also be noted that the pivots a1 and a2 and the adjusting pin 231 are arranged in a triangle on the base 21. When the backrest connecting rod 23 rotates, the backrest connecting rod 23 makes a circular motion around the pivot a2, and the adjusting pin 231 slides along the track groove 221, causing the seat rod 22 to make a circular motion around the pivot a1. The seat rod 22 then flips relative to the base 21, thereby changing the angle between the seat rod 22 and the horizontal plane.

[0130] like Figure 16As shown, the track groove 221 has a front end portion 221a, a rear end portion 221c, and a corner portion 221b located between the front end portion 221a and the rear end portion 221c. The corner portion 221b is located behind the front end portion 221a and above the rear end portion 221c. The track groove 221 is generally L-shaped. When the seat mechanism 100 is in the reclining position, the adjustment pin 231 is located in the front end portion 221a of the track groove 221, as shown. Figure 21 As shown. When the seat mechanism 100 is in a zero-gravity state, the adjusting pin 231 is located in the corner portion 221b, as... Figure 20 As shown. When the seat mechanism 100 is in a seated position, the adjusting pin 231 is located in the rear end 221c, as... Figure 19 As shown.

[0131] The seating mechanism 100 also includes a third locking member 24. In the locked state, the third locking member 24 is disposed on the base 21 and the backrest link 23, thereby locking the backrest link 23 relative to the base 21. In the unlocked state, the third locking member 24 releases the backrest link 23 and the base 21, allowing the backrest link 23 to rotate relative to the base 21. In some other embodiments, the third locking member 24 may also be disposed on the base 21 and the seat rod 22 in the locked state, and release the base 21 and the seat rod 22 in the unlocked state. Specifically, in the example shown in the figures, the third locking member 24 includes a sliding pin, and the third locking member 24 is slidably disposed on the backrest link 23. Specifically, the backrest link 23 has a groove 232 extending along its length, and the third locking member 24 is slidably inserted into the groove 232. The base 21 is provided with a plurality of locking slots arranged sequentially along the outer periphery of the base 21. When the seat mechanism 100 is in any usage state, the third locking member 24 is inserted into the slide groove 232 and one of the locking slots. When the third locking member 24 disengages from the locking slot, the seat mechanism 100 is allowed to switch usage states. Specifically, as follows... Figure 16 As shown, a first locking groove 211, a second locking groove 212, and a third locking groove 213 are provided on the outer peripheral surface of the base 21. The first locking groove 211, the second locking groove 212, and the third locking groove 213 extend inward from the outer peripheral edge of the base 21, thereby allowing the third locking member 24 to enter and exit any of the locking grooves. The first locking groove 211, the second locking groove 212, and the third locking groove 213 are arranged at intervals.

[0132] Furthermore, the third locking member 24 can also lock and unlock the backrest link 23 and the backrest rod 25. When the seat mechanism 100 is unfolded, regardless of its usage state or during transitions between different usage states, the third locking member 24 always connects the backrest rod 25 and the backrest link 23. When the seat mechanism 100 needs to be folded, the third locking member 24 is in the unlocked state, disengaging from the backrest link 23, allowing the backrest rod 25 to flip forward relative to the backrest link 23 to approach the seat 1. The third locking member 24 is mounted on the backrest rod 25 and can slide relative to the backrest rod 25. Specifically, as... Figure 17 As shown, the backrest rod 25 has a mounting groove 251 extending along its length, and a third locking member 24 is slidably disposed in the mounting groove 251. The length of the mounting groove 251 is greater than the length of the slide groove 232, and the upper end of the slide groove 232 is open to allow the third locking member 24 to enter and exit the slide groove 232. Figure 16 As shown, the slide groove 232 extends downward from the upper edge of the backrest link 23, and is U-shaped overall. Figures 19 to 21 During any of the shown usage states or during transitions between different usage states, the third locking element 24 will not disengage from the slide groove 232. When the seat mechanism 100 needs to be folded, as shown... Figure 22 As shown, the third locking member 24 is moved upward to disengage it from the slide groove 232. At this time, the backrest rod 25 and the backrest connecting rod 23 are unlocked, and the backrest rod 25 can be flipped forward relative to the backrest connecting rod 23 to move closer to the seat 1 and achieve folding.

[0133] The upper end of the leg support 3 is pivotally connected to the front of the seat 1. The leg support drive device 5 includes a first push rod 26, a second push rod 27, and a third push rod 28. The first end of the first leg support 3 is rotatably connected to the backrest link 23. The first end of the second push rod 27 is rotatably connected to the second end of the first push rod 26. The first end of the third push rod 28 is rotatably connected to the second end of the second push rod 27, and the second end of the third push rod 28 is rotatably connected to the leg support 3. When the backrest link 23 rotates, the first push rod 26 rotates accordingly, thereby pushing the leg support 3 to flip and change its angle through the second push rod 27 and the third push rod 28. The second push rod 27 is slidably mounted on the seat 1 in the front-back direction. Specifically, the seat rod 22 is provided with a sliding sleeve 222, through which the second push rod 27 can slide in the front-back direction.

[0134] Furthermore, the second end of the third push rod 28 can slide relative to the leg support 3, allowing the lower end of the leg support 3 and the backrest 2 to come closer together after the seat mechanism 100 is folded. Figure 22As shown. Specifically, the leg support 3 has an elongated groove 3a that extends along the centerline of the leg support 3. A connecting pin 281 is provided at the second end of the third push rod 28. This connecting pin 281 is inserted into the elongated groove 3a and configured to rotate within and slide along the elongated groove 3a. During the transition of the seat mechanism 100 from a seated state to a folded state, the connecting pin 281 slides from the lower end of the elongated groove 3a to its upper end, as shown. Figure 22 As shown.

[0135] This embodiment also provides a vehicle 200, which can be used as a vehicle 200 Figures 23 to 26 The stroller shown. (Refer to...) Figures 23 to 26 As shown, the stroller includes a frame 201 and wheels located at the bottom of the frame 201. The base 21 of the seat mechanism 100 is fixed to the frame 201 and is part of the frame 201, for example, it can be part of the rotating joint of the frame 201. The frame 201 has an unfolded state and a folded state. The seat mechanism 100 can be unfolded and folded on the frame 201, and when unfolded, it has three usage states: sitting, zero gravity, and lying down, as shown respectively. Figure 24 , Figure 25 and Figure 26 As shown.

[0136] The process by which the seating mechanism 100 switches between the three usage states is as follows:

[0137] When the seat mechanism 100 is in a seated position, the third locking member 24 is inserted into the mounting groove 251, the sliding groove 232, and the first locking groove 211 to lock the seat mechanism 100 in the seated position. When the third locking member 24 is moved upward, disengaging from the first locking groove 211 and moving along the outer peripheral surface of the base 21 between the first locking groove 211 and the second locking groove 212, the third locking member 24 remains in the sliding groove 232 and the mounting groove 251. Subsequently, when the backrest 2 is pressed downward, the backrest link 23 relative to the base... The seat 21 rotates upward, causing the adjusting pin 231 to slide from the rear end of the track groove 221 to the corner of the track groove 221. The seat rod 22 then rotates around the base 21, and its front side rises upward. At the same time, the first push rod 26, the second push rod 27, and the third push rod 28 work together to push the leg support 3 to flip upward. This continues until the third locking member 24 slides above the second locking groove 212 and falls into the second locking groove 212, locking the seat mechanism 100 in a zero-gravity state, thus realizing the transition from a sitting position to a zero-gravity state. The transition from a sitting position or a zero-gravity state to a reclining position is similar to the above process, except that the third locking member 24 slides above the third locking groove 213 and falls into the third locking groove 213, locking the seat mechanism 100 in a reclining position.

[0138] When the seat mechanism 100 is in a reclining position, the third locking member 24 is inserted into the mounting groove 251, the sliding groove 232, and the third locking groove 213 to lock the seat mechanism 100 in the reclining position. When the third locking member 24 is moved upward, disengaging from the third locking groove 213 and moving along the outer peripheral surface of the base 21 between the third locking groove 213 and the second locking groove 212, the third locking member 24 remains in the sliding groove 232 and the mounting groove 251. Subsequently, when the backrest 2 is pushed upward, the backrest link 23 relative to the base... The seat 21 rotates downwards, causing the adjusting pin 231 to slide from the front end of the track groove 221 to the corner of the track groove 221. The seat rod 22 then rotates around the base 21, and its front side flips downwards. At the same time, the first push rod 26, the second push rod 27, and the third push rod 28 cooperate to push the leg support 3 to flip downwards. This continues until the third locking member 24 slides above the second locking groove 212 and falls into the second locking groove 212, locking the seat mechanism 100 in a zero-gravity state, thus realizing the transition from a lying position to a zero-gravity state. The transition process from a lying position or a zero-gravity state to a sitting position is similar to the aforementioned process, except that the third locking member 24 slides above the first locking groove 211 and falls into the first locking groove 211, locking the seat mechanism 100 in a sitting position.

[0139] The folding process of the seat mechanism 100 is as follows:

[0140] With the seat mechanism 100 in a seated position, move the third locking member 24 upwards to disengage it from the slide groove 232, unlocking the backrest rod 25 and backrest connecting rod 23. Push the backrest rod 25 forward to bring it closer to the seat 1, thus switching to the seat position. Figure 22 The folded state shown.

[0141] The seating mechanism 100 has the following advantages: it has multiple usage states, including a zero-gravity state, in which the height of the occupant's heart and knees is basically the same, providing optimal comfort and ease of use, allowing children in the seating mechanism 100 to adopt various postures; the backrest 2 allows the seating mechanism 100 to switch between multiple usage states such as sitting, zero-gravity, and reclining, and the switching operation is convenient; the angle of the leg support 3 also automatically changes accordingly in different usage states, providing corresponding support for the lower legs, further improving seating comfort and ease of use. Example

[0142] This embodiment provides a Figures 27 to 34 The seating mechanism 100 and a vehicle shown are for carrying children and can be a stroller, car seat, etc.

[0143] Reference Figures 27 to 31As shown, similar to Embodiment 1, the seating mechanism 100 mainly includes a seat 1, a backrest 2, and a leg support 3. The seat 1 includes a seat plate defining a first plane P1 for supporting the occupant's thighs; the backrest 2 includes a backrest 2 plate defining a second plane P2 for supporting the occupant's back. The leg support 3 is located at the front of the seat 1 and includes a leg plate defining a third plane P3 for supporting the occupant's lower legs, as shown. Figure 30 As shown. The seat 1 and backrest 2 can rotate relative to each other, and the leg support 3 can rotate relative to the seat 1, so that the seat mechanism 100 has at least three usage states, including a sitting posture (e.g., Figure 29 As shown), lying position (such as...) Figure 31 (as shown) and the zero-gravity state between sitting and lying positions (such as...) Figure 30 As shown). Figure 30 As shown, in zero gravity, the front end of seat 1 is higher than its rear end. The first plane P1 has a first angle α1 greater than zero relative to the horizontal plane, the second plane P2 has a second angle α2 greater than zero relative to the horizontal plane, and the third plane P3 has a third angle α3 greater than zero relative to the horizontal plane. This arrangement ensures that the occupant's heart (position H1) and knees (position H2) are at the same height, providing optimal comfort. The first angle α1 is 18–40 degrees, the second angle α2 is 35–55 degrees, and the third angle α3 is 26–40 degrees.

[0144] like Figure 29 As shown, in a seated position, the angle between the first plane P1 and the horizontal plane is smaller than the first angle α1, the angle between the second plane P2 and the horizontal plane is larger than the second angle α2, and the angle between the third plane P3 and the horizontal plane is larger than the third angle α3. Figure 31 As shown, in the lying position, the angle between the first plane P1 and the horizontal plane is less than the first angle α1, the angle between the second plane P2 and the horizontal plane is less than the second angle α2, and the angle between the third plane P3 and the horizontal plane is less than the third angle α3.

[0145] In this embodiment, a seat drive device 4 is provided between the backrest 2 and the seat 1 so that the seat 1 can be rotated when the backrest 2 rotates. The main differences between this embodiment and embodiment 1 are: (1) seat drive device 4; (2) the upper end of the leg support 3 is connected to the front of the seat 1 only through a rotating joint 35, and no leg support drive device is provided between the leg support 3 and the backrest 2 and the seat 1, and the angle of the leg support 3 is manually adjusted; (3) the seat mechanism 100 is not foldable. The structure and driving principle of the seat drive device 4 in this embodiment will be described in detail below.

[0146] The seat drive unit 4 includes a mounting base 31 for securing the seat mechanism 100 to a support portion of a vehicle (e.g., the frame of a trolley, the base of a car seat, etc.). Figure 28 As shown, the lower end of the backrest 2 has a first connecting portion 33a and a second connecting portion 33b spaced apart from each other. (Combined) Figures 29 to 31 The first connecting part 33a of the backrest 2 is rotatably connected to the fixed seat 31; specifically, the first connecting part 33a is rotatably connected to the fixed seat 31 via pivot a11. The second connecting part 33b of the backrest 2 is rotatably connected to the seat 1; specifically, the second connecting part 33b is rotatably connected to the seat 1 via pivot a12. The seat 1 is slidably mounted on the fixed seat 31. One of the fixed seat 31 and the seat 1 is provided with a guide groove 321, and the other is provided with a guide block 30. The guide block 30 is inserted into the guide groove 321 and can slide back and forth along the guide groove 321. The guide groove 321 is configured such that, during the forward sliding of the guide block 30, the angle between the seat plate and the horizontal plane first increases and then decreases, while the angle between the leg support 3 and the horizontal plane gradually decreases. Specifically, in this embodiment, the fixed seat 31 is provided with a guide groove seat 32, and the guide groove 321 is mounted on the guide groove seat 32. The guide groove seat 32 remains fixed relative to the fixed seat 31, and the two will not slide relative to each other. Guide block 30 is fixed on seat 1.

[0147] Furthermore, the guide groove 321 has a front end portion 321a, a rear end portion 321c, and a corner portion 321b located between the front end portion 321a and the rear end portion 321c, the corner portion 321b being higher than the front end portion 321a and the rear end portion 321c. When the backrest 2 is pressed down or pushed up, the backrest 2 rotates around the pivot a11, and the second connecting portion 33b and the pivot a12 rotate accordingly, thereby driving the seat 1 to move relative to the fixed seat 31. When the seat mechanism 100 is in a reclining position, the guide block 30 is located in the front end portion 321a of the guide groove 321, such as... Figure 31 and Figure 34 As shown. When the seat mechanism 100 is in a zero-gravity state, the guide block 30 is located in the corner portion 321b, as... Figure 30 and Figure 33 As shown. When the seat mechanism 100 is in a seated position, the guide block 30 is located in the rear end 321c, as shown. Figure 29 and Figure 32 As shown.

[0148] A locking element (not shown in the figure) is provided between the backrest 2 and the fixed seat 31, which connects the backrest 2 and the fixed seat 31 to lock the seat mechanism 100 in any use state. If the locking element is disengaged from the backrest 2 and / or the fixed seat 31, the seat mechanism 100 is in the unlocked state and can switch between three use states.

[0149] The seat 1 and leg support 3 are respectively connected to two components of the rotating joint 35. After the rotating joint 35 is unlocked, the leg support 3 can rotate relative to the seat 1, thereby adjusting the angle of the leg support 3; after adjustment, the rotating joint 35 locks the leg support 3 and the seat 1. The specific structure of the rotating joint 35 is not the focus of this utility model application; it can adopt a structure known in the prior art, such as the electric bell structure disclosed in patent CN216861575U.

[0150] The seating mechanism 100 of this embodiment can be used as a seat for a child vehicle. If the child vehicle is a stroller, the fixing seat 31 of the seating mechanism 100 is mounted on the frame 201. If the child vehicle is a car seat, the fixing seat 31 of the seating mechanism 100 is mounted on the base of the car seat.

[0151] The process by which the seating mechanism 100 switches between the three usage states is as follows:

[0152] When the seat mechanism 100 is in a sitting position, the backrest 2 and the fixed seat 31 are unlocked, and the backrest 2 is pressed down. The backrest 2 rotates around the pivot a11, and the second connecting part 33b pushes the seat 1 forward and upward. Under the action of the guide groove 321, the seat 1 flips to the desired angle until the guide block 30 slides forward from the rear end of the guide groove 321 to its corner 321b. The seat mechanism 100 is then in a zero-gravity state, realizing the transition from a sitting position to a zero-gravity state. The transition from a sitting position or a zero-gravity state to a reclining position is similar to the above process, except that when the guide block 30 slides forward to the front end of the guide groove 321, the seat mechanism 100 is in a reclining position. In the above process, the angle of the leg support 3 is manually adjusted by unlocking the rotating joint 35 and flipping it.

[0153] When the seat mechanism 100 is in a reclining position, the backrest 2 and the fixed seat 31 are unlocked, and the backrest 2 is pushed upward. The backrest 2 rotates around the pivot a11, and the second connecting part 33b pulls the seat 1 backward and downward. Under the action of the guide groove 321, the seat 1 flips to the desired angle until the guide block 30 slides backward from the front end of the guide groove 321 to its corner 321b. The seat mechanism 100 is then in a zero-gravity state, realizing the transition from a reclining state to a zero-gravity state. The transition from a reclining state or a zero-gravity state to a sitting state is similar to the above process, except that when the guide block 30 slides backward to the rear end of the guide groove 321, the seat mechanism 100 is in a sitting state. During the above process, the angle of the leg support 3 is manually adjusted by unlocking the rotating joint 35 and flipping it.

[0154] The seating mechanism 100 has the following advantages: it has multiple usage states, including a zero-gravity state, in which the height of the occupant's heart and knees is basically the same, providing optimal comfort and ease of use, allowing children in the seating mechanism 100 to adopt various postures; the backrest 2 allows the seating mechanism 100 to switch between multiple usage states such as sitting, zero-gravity, and reclining, and the switching operation is convenient; in different usage states, the angle of the leg support 3 can be manually adjusted to provide corresponding support for the lower legs, further improving riding comfort. Example

[0155] Reference Figures 35 to 43 As shown, the difference between Embodiment 4 and Embodiment 3 is that a leg support drive device 5 is provided between the leg support 3 and the backrest 2, and the angle of the leg support 3 can be automatically adjusted as the backrest 2 rotates. The seat drive device 4 is basically the same as that in Embodiment 3. The structure and driving principle of the leg support drive device 5 will be described in detail below.

[0156] The leg support drive device 5 includes a linkage assembly 34, which is rotatably connected between the backrest 2 and the leg support 3. The linkage assembly 34 includes multiple rotatably connected linkage rods. The linkage assembly 34 may include a first linkage rod 341, a second linkage rod 342, and a third linkage rod 343. The first end of the first linkage rod 341 is rotatably connected to the leg support 3; the second linkage rod 342 is slidably mounted on the seat 1 in the front-back direction, and its first end (front end) is rotatably connected to the second end of the first linkage rod 341, while its second end (rear end) is rotatably connected to the first end of the third linkage rod 343; the second end of the third linkage rod 343 is directly or indirectly rotatably connected to the backrest 2. In the example shown in the figures, the second end of the third linkage rod 343 is rotatably connected to the backrest 2 via a fourth linkage rod 344. Specifically, as shown in the figures... Figure 40 As shown, the backrest 2 also has a third connecting portion 33c, which is located below the second connecting portion 33b. The first end (upper end) of the fourth linkage 344 is connected to the second connecting portion 33b. Preferably, the first end of the fourth linkage, the second connecting portion 33b, and the seat 1 are simultaneously pivotally connected via pivot a12. The second end (lower end) of the fourth linkage 344 is connected to the third connecting portion 33c, and the second end of the third linkage 343 is connected to the second end of the fourth linkage 344. The fourth linkage 344 strengthens the backrest 2, particularly enhancing the portion of the backrest 2 used to apply forward thrust or backward pull to the linkage assembly 34.

[0157] Seat 1 is provided with a limiting groove, configured to restrict the second linkage rod 342 to slide only relative to seat 1. Specifically, as follows: Figure 40 As shown, the seat 1 is provided with a first limiting groove 345 and a second limiting groove 346 extending generally in the front-back direction. The first limiting groove 345 and the second limiting groove 346 are located on the front and rear sides of the guide block 30, respectively. The first linkage rod 341 and the second linkage rod 342 are pivotally connected, and the pivot connecting the two is inserted into the first limiting groove 345 and can move back and forth in the first limiting groove 345. The second linkage rod 342 and the third linkage rod 343 are pivotally connected, and the pivot connecting the two is inserted into the second limiting groove 346 and can move back and forth in the second limiting groove 346. The movement direction of the second linkage rod 342 is restricted by the limiting grooves, so that the leg support 3 can be rotated when the backrest 2 is rotated.

[0158] The angle conversion process of seat 1 in this seating mechanism 100 is the same as in Embodiment 3, and will not be repeated here. The angle conversion process of the leg support foot during the three usage state transitions is described in detail below.

[0159] When the seat mechanism 100 is in a seated or zero-gravity state, pressing down on the backrest 2 causes the fourth linkage 344 to rotate around the pivot a11, which in turn causes the third linkage 343 to rotate forward. The second linkage 342 slides forward, and the first linkage 341 moves forward and flips upward to push the leg support 3 to flip upward, causing the leg support 3 to tilt upward and reduce the angle relative to the horizontal plane.

[0160] When the seat mechanism 100 is in a reclining or zero-gravity state, pushing the backrest 2 upward causes the fourth linkage rod 344 to rotate around the pivot a11, pulling the third linkage rod to rotate backward. The second linkage rod 342 slides backward, and the first linkage rod 341 flips backward to pull the leg support 3 backward and downward, causing the leg support 3 to fall and increase the angle relative to the horizontal plane.

[0161] The seating mechanism 100 has the following advantages: it has multiple usage states, including a zero-gravity state, in which the height of the occupant's heart and knees is basically the same, providing optimal comfort and ease of use, allowing children in the seating mechanism 100 to adopt various postures; the backrest 2 can be operated to switch between multiple usage states such as sitting, zero-gravity, and reclining, and the switching operation is convenient; in different usage states, as the backrest 2 flips, the angle of the leg support 3 can be automatically adjusted to provide corresponding support for the lower legs, further improving riding comfort.

[0162] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0163] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. In the event of any contradiction or inconsistency between the definitions used herein and those contained in other published documents, the definitions used herein shall prevail.

[0164] It should also be noted that "rotational connection" in the above embodiments refers to pivot connection, unless the context clearly indicates other rotational connection methods.

[0165] As indicated in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0166] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0167] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0168] The above embodiments are only for illustrating the technical concept and features of this utility model, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly, and they cannot be used to limit the protection scope of this utility model.

Claims

1. A seating mechanism, characterized in that, Includes a seat and a backrest that can rotate relative to the seat, the seat defining a first plane for supporting the thighs of a occupant and the backrest defining a second plane for supporting the back of a occupant. The seating mechanism has at least three usage states, including a sitting state, a reclining state, and a zero-gravity state between the sitting and reclining states. In the zero-gravity state, the angle between the first plane and the second plane is greater than the angle between the first plane and the second plane in the sitting state, and less than the angle between the first plane and the second plane in the reclining state. In the zero-gravity state, the front of the seat is higher than its rear, the first plane has a first angle greater than zero relative to the horizontal plane, and the second plane has a second angle greater than zero relative to the horizontal plane, so that the occupant's heart and knees are at the same height.

2. The seating mechanism according to claim 1, characterized in that, The seating mechanism includes a leg support that is rotatable relative to the seat. The leg support is located at the front of the seat and defines a third plane for supporting the occupant's lower leg. In the zero-gravity state, the lower end of the leg support is located in front of its upper end, and the third plane has a third included angle greater than zero relative to the horizontal plane.

3. The seating mechanism according to claim 2, characterized in that, The first included angle is 18 to 40 degrees, the second included angle is 35 to 55 degrees, and the third included angle is 26 to 40 degrees.

4. The seating mechanism according to claim 3, characterized in that, The first included angle is 25-35 degrees, the second included angle is 40-50 degrees, and the third included angle is 28-35 degrees.

5. The seating mechanism according to claim 2, characterized in that, The upper end of the leg support is rotatably connected to the front of the seat, and a leg support drive device is connected between the lower end of the backrest or between the seat and the leg support, so that the leg support rotates when the backrest or the seat rotates; or, the upper end of the leg support is connected to the front of the seat via a rotating joint, so that the leg support can be rotated after the rotating joint is unlocked.

6. The seating mechanism according to claim 1, characterized in that, The lower end of the backrest is connected to the rear of the seat via a seat drive device so that the seat rotates when the backrest rotates.

7. The seating mechanism according to claim 6, characterized in that, The seating mechanism includes a connecting seat, and the rear part of the seat is rotatably connected to the connecting seat; The seat drive device includes: A backrest drive rod, wherein the backrest is rotatably connected to the connecting seat via the backrest drive rod; A first drive rod has a first end rotatably connected to the backrest drive rod; The second drive rod has a first end that is rotatably connected to the connecting seat; The third drive rod has a first end rotatably connected to the seat; The second end of the first drive rod, the second end of the second drive rod, and the second end of the third drive rod are rotatably connected to each other. The seating mechanism further includes a first locking member having a locked state and an unlocked state. In the locked state, the first locking member connects at least two components of the backrest drive rod, the first drive rod, the second drive rod, the third drive rod, and the connecting seat to lock the seating drive device, thereby stabilizing the seating mechanism in the sitting state, the zero-gravity state, or the reclining state. In the unlocked state, the first locking member disengages from the at least two components to release the seating drive device, thereby allowing the backrest and the seat to rotate relative to each other.

8. The seating mechanism according to claim 7, characterized in that, The backrest drive rod includes: An upper drive rod is fixedly connected to the lower end of the backrest or is integral with the backrest, and the upper drive rod is rotatably connected to the connecting seat; The lower drive rod has a first end rotatably connected to the connecting seat and / or the upper drive rod and a second end rotatably connected to the first end of the first drive rod; The seating mechanism further includes a second locking member having a locked state and an unlocked state. In the locked state, the second locking member connects the upper drive rod and the lower drive rod. In the unlocked state, the second locking member disengages from the upper drive rod and / or the lower drive rod to allow the upper drive rod to flip relative to the lower drive rod, thereby folding or unfolding the seating mechanism.

9. The seating mechanism according to claim 8, characterized in that, The seating mechanism further includes a leg support that can rotate relative to the seat and a leg support drive device for driving the leg support to rotate. The upper end of the leg support is rotatably connected to the front of the seat and defines a third plane for supporting the occupant's lower leg. The leg support drive device includes a fourth drive rod, the first end of which is rotatably connected to the second drive rod or the third drive rod, and the second end of which is rotatably connected to the leg support.

10. The seating mechanism according to claim 9, characterized in that, The second end of the fourth drive rod is rotatably and slidably connected to the leg support, allowing the lower end of the leg support and the backrest to come closer together when the seat mechanism is folded.

11. The seating mechanism according to claim 6, characterized in that, The seating mechanism includes a base, and the seat includes a seat rod, which is rotatably connected to the base; The seat drive device includes a backrest link connected to the backrest, and the backrest link is rotatably connected to the base; The seat rod and the backrest link are slidably and rotatably connected so that the seat rod rotates when the backrest link rotates with the backrest, thereby changing the use state of the seat mechanism.

12. The seating mechanism according to claim 11, characterized in that, The seat rod is provided with a track groove, and the backrest connecting rod is provided with an adjusting pin. The adjusting pin is slidably inserted into the track groove to connect the seat rod and the backrest connecting rod. The track groove has a front end, a rear end, and a corner portion located between the front end and the rear end. The corner portion is located behind the front end and above the rear end. When the seat mechanism is in a reclining position, the adjusting pin is located in the front end. When the seat mechanism is in a zero-gravity state, the adjusting pin is located in the corner portion. When the seat mechanism is in a sitting position, the adjusting pin is located in the rear end. The seat mechanism further includes a third locking member, which is movably disposed on the backrest link. The base is provided with a plurality of locking slots arranged sequentially along the outer periphery of the base. When the seat mechanism is in any use state, the third locking member is inserted into one of the locking slots. When the third locking member is disengaged from each of the locking slots, the seat mechanism is allowed to switch use states.

13. The seating mechanism according to claim 12, characterized in that, The seating mechanism further includes a leg support that can rotate relative to the seat and a leg support drive device for driving the leg support to rotate, wherein the upper end of the leg support is rotatably connected to the front of the seat and defines a third plane for supporting the occupant's lower leg. The leg support drive device includes: The first push rod has a first end rotatably connected to the backrest link; The second push rod has a first end that is rotatably connected to the second end of the first push rod; The third push rod has a first end that is rotatably connected to the second end of the second push rod; The second end of the third push rod is rotatably connected to the leg support member; The second push rod can be slidably mounted on the seat in the back-and-forth direction; The second end of the third push rod can slide relative to the leg support to allow the lower end of the leg support and the backrest to come together when the seat mechanism is folded. The third locking member is slidably mounted on the backrest, and the backrest link is provided with a sliding groove. In any of the said use states, the third locking member is inserted into the sliding groove and one of the said locking slots. The third locking member also has a position to disengage from the sliding groove and each of the said locking slots to allow the backrest to flip relative to the backrest link, thereby folding or unfolding the seat mechanism.

14. The seating mechanism according to claim 6, characterized in that, The seat driving device includes a fixed base, a first connecting part of the backrest rotatably connected to the fixed base, a seat slidably disposed on the fixed base, and a second connecting part of the backrest rotatably connected to the seat. The second connecting part and the first connecting part are spaced apart. One of the fixed base and the seat is provided with a guide groove, and the other is provided with a guide block. The guide groove has a front end, a rear end, and a corner portion located between the front end and the rear end. The corner portion is higher than the front end and the rear end. When the seat mechanism is in a reclining position, the guide block is located in the front end. When the seat mechanism is in a zero-gravity state, the guide block is located in the corner portion. When the seat mechanism is in a sitting position, the guide block is located in the rear end.

15. The seating mechanism according to claim 14, characterized in that, The seating mechanism further includes a leg support that can rotate relative to the seat and a leg support drive device for rotating the leg support, the leg support defining a third plane for supporting the occupant's lower leg; The upper end of the leg support is rotatably connected to the front of the seat. The leg support drive device includes a linkage assembly, which is rotatably connected to the second connecting part and the leg support. The linkage assembly includes a plurality of linkage rods that are rotatably connected to each other. The linkage assembly includes a first linkage rod rotatably connected to the leg support, a second linkage rod slidably connected to the seat in the front-back direction, and a third linkage rod rotatably connected to the backrest. The front ends of the first linkage rod and the second linkage rod are rotatably connected, and the rear end of the second linkage rod is rotatably connected to the third linkage rod. A locking element is provided between the backrest and the fixed seat, and the seat mechanism can switch between different usage states when the locking element is in the unlocked state.

16. The seating mechanism according to claim 1, characterized in that, The seating mechanism also has a folded state, in which the backrest and the seat are close together; in the sitting position, the angle between the first plane and the horizontal plane is smaller than the first angle, and the angle between the second plane and the horizontal plane is larger than the second angle; in the reclining position, the angle between the first plane and the horizontal plane is smaller than the first angle, and the angle between the second plane and the horizontal plane is smaller than the second angle.

17. A vehicle, characterized in that, Including the seating mechanism as described in any one of claims 1 to 16.

18. The vehicle according to claim 17, characterized in that, The vehicle includes a stroller, which includes a frame and wheels disposed at the bottom of the frame, and the seating mechanism is removably or fixedly connected to the frame; Alternatively, the vehicle may include a car safety seat, the seating mechanism being removably or fixedly attached to the base of the car safety seat.

Images