Seat mechanism and carrier

Abstract

The invention 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] The invention relates to a seat mechanism and a carrier, such as a child stroller. Background Art

[0002] The seat mechanism is one of the indispensable parts of child carriers such as strollers and car safety seats. Common seat mechanisms include a seat and a backrest. The seat is used to support the child's buttocks and thighs, and the backrest is used to support the child's back. In order to improve the comfort of use, some seat mechanisms have an adjustment mechanism between the seat and the backrest, which can adjust the angle between the seat and the backrest; so that the seat mechanism can be transformed, for example, it can be transformed between multiple use states such as sitting, semi-reclining and lying. For the seat mechanism in the semi-reclining state, the angle of the seat, the angle of the backrest and the angle between the two have a crucial influence on the comfort of use.

[0003] The above information disclosed in the Background section is only for enhancement of understanding of the background of the present application and therefore it may contain information that does not constitute the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0004] The invention relates to a seat mechanism and a vehicle, which have a sitting state, a lying state and a zero-gravity state, and are relatively comfortable to ride, especially having the best comfort in the zero-gravity state.

[0005] A first aspect of the present invention provides a seat mechanism comprising a seat and a backrest capable of rotating relative to the seat, wherein the seat defines a first plane for supporting the thighs of an occupant, and the backrest defines a second plane for supporting the back of the occupant;

[0006] The seat mechanism has at least three usage states, which include a sitting state, a lying state and a zero gravity state between the sitting state and the lying state. 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 smaller than the angle between the first plane and the second plane in the lying state. In the zero gravity state, the front of the seat is higher than the back of the seat, 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 heart and knees of the occupant are at the same height.

[0007] In some preferred embodiments, the seat mechanism comprises a leg support that can rotate relative to the seat, the leg support is located at the front side of the seat and defines a third plane for supporting the calves of the occupant, and when the seat mechanism is in the zero gravity state, the lower end of the leg support is located in front of the upper end thereof, and the third plane has a third angle greater than zero relative to the horizontal plane.

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

[0009] In some further preferred embodiments, the first angle is 25 to 35 degrees, the second angle is 40 to 50 degrees, and the third angle is 28 to 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 driving device is connected between the lower end of the backrest or the seat and the leg support to rotate the leg support when the backrest or the seat rotates. In different use states, as the backrest flips, the angle of the leg support can be automatically adjusted to provide corresponding support for the calf, further helping to improve the riding comfort.

[0011] In some optional embodiments, the upper end of the leg support is connected to the front end of the seat through a rotating joint to allow the leg support to be rotated after the rotating joint is unlocked. In these embodiments, the angle of the leg support can be freely adjusted manually to obtain a desired comfortable angle.

[0012] In some preferred embodiments, the lower end of the backrest is connected to the rear of the seat through a seat drive device, so that the seat rotates when the backrest rotates. The seat mechanism can be switched between multiple use states such as sitting, zero gravity and lying by operating the backrest, and the switching operation is convenient.

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

[0014] The seat driving device comprises:

[0015] A backrest driving rod, through which the backrest is rotatably connected to the connecting seat;

[0016] a first drive rod having a first end portion rotatably connected to the backrest drive rod;

[0017] A second driving rod having a first end portion rotatably connected to the connecting seat;

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

[0019] Wherein, the second end of the first driving rod, the second end of the second driving rod and the second end of the third driving rod are rotatably connected;

[0020] The seat mechanism also 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 of the connecting seat, the backrest drive rod, the first drive rod, the first drive rod, the second drive rod, the third drive rod and the connecting seat to lock the seat drive device so that the seat mechanism is stabilized in the sitting state, the zero gravity state or the lying state; in the unlocked state, the first locking member disengages from the at least two components to release the seat drive device to allow the backrest and the seat to rotate relative to each other.

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

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

[0023] A lower driving rod having a first end rotatably connected to the connecting seat and / or the upper driving rod and a second end rotatably connected to the first end of the first driving rod;

[0024] The seat mechanism also includes a second locking member, which has 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 is disengaged 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 seat mechanism.

[0025] In some more preferred embodiments, the seat mechanism also includes a leg support that can rotate relative to the seat and a leg support driving 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 calf of the occupant; the leg support driving device includes a fourth driving rod, a first end of the fourth driving rod is rotatably connected to the second driving rod or the third driving rod, and a second end of the fourth driving rod is rotatably connected to the leg support.

[0026] In some more preferred embodiments, the second end of the fourth driving rod is rotatably and slidably connected to the leg support to allow the lower end of the leg support and the backrest to move closer to each other after the seat mechanism is folded.

[0027] In some preferred embodiments, the seat mechanism comprises a base, the seat comprises a seat post, and the seat post is rotatably connected to the base;

[0028] The seat driving device includes a backrest connecting rod connected to the backrest, and the backrest connecting rod is rotatably connected to the base;

[0029] The seat rod and the backrest connecting rod are slidably and rotatably connected, so that when the backrest connecting rod rotates with the backrest, the seat rod is driven to rotate, so that the seat mechanism is switched to a use state.

[0030] In some more preferred embodiments, the seat rod is provided with a track groove, and the backrest connecting rod is provided with an adjustment pin, and the adjustment pin can be slidably inserted into the track groove to connect the seat rod and the backrest connecting rod through the adjustment pin; the track groove has a front end portion, a rear end portion and a corner portion located between the front end portion and the rear end portion, the corner portion is located on the rear side of the front end portion and on the upper side of the rear end portion, the adjustment pin is located in the front end portion when the seat mechanism is in a lying state, the adjustment pin is located in the corner portion when the seat mechanism is in a zero gravity state, and the adjustment pin is located in the rear end portion when the seat mechanism is in a sitting state.

[0031] In some more preferred embodiments, the seat mechanism also includes a third locking member, which is movably arranged on the backrest connecting rod, and the base is provided with a plurality of locking grooves arranged in sequence along the outer circumferential direction of the base. When the seat mechanism is in any use state, the third locking member is inserted into one of the locking grooves, and when the third locking member and the locking grooves are disengaged, the seat mechanism is allowed to change the use state.

[0032] In some more preferred embodiments, the seat mechanism further comprises a leg support capable of rotating relative to the seat and a leg support driving device for driving the leg support to rotate, wherein the upper end of the leg support is rotatably connected to the front portion of the seat and defines a third plane for supporting the calf of the occupant;

[0033] The leg support driving device comprises:

[0034] a first push rod having a first end portion rotatably connected to the backrest connecting rod;

[0035] a second push rod having a first end portion rotatably connected to the second end portion of the first push rod;

[0036] a third push rod having a first end portion rotatably connected to the second end portion of the second push rod;

[0037] Wherein, 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 along the front-rear direction.

[0039] In some further preferred embodiments, 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 move closer to each other after the seat mechanism is folded.

[0040] In some more preferred embodiments, the third locking member is slidably mounted on the backrest, and a slide groove is provided on the backrest connecting rod. In any of the usage states, the third locking member is inserted into the slide groove and one of the locking grooves. The third locking member also has a position disengaged from the slide groove and each of the locking grooves to allow the backrest to be flipped relative to the backrest connecting rod, thereby folding or unfolding the seat mechanism.

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

[0042] In some more preferred embodiments, the seat mechanism further comprises a leg support rotatable relative to the seat and a leg support driving device for driving the leg support to rotate, the leg support defining a third plane for supporting the calf of an occupant.

[0043] In some more preferred embodiments, the upper end portion of the leg support is rotatably connected to the front portion of the seat, and the leg support driving device includes a connecting rod assembly, which is rotatably connected to the second connecting portion and the leg support, and the connecting rod assembly includes a plurality of linkage rods rotatably connected to each other.

[0044] In some further preferred embodiments, the connecting rod assembly includes a first linkage rod rotatably connected to the leg support, a second linkage rod slidably connected to the seat in the front-to-rear 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 member is provided between the backrest and the fixing seat, and when the locking member is in an unlocked state, the seat mechanism is allowed to switch to a use state.

[0046] In some preferred embodiments, the seat mechanism further has a folded state, in which the backrest and the seat are brought close to each other.

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

[0048] A second aspect of the present invention provides a vehicle comprising the seat mechanism.

[0049] In some preferred embodiments, the carrier comprises a baby carriage, which comprises a frame and wheels disposed at the bottom of the frame, and the seat mechanism is removably or fixedly connected to the frame.

[0050] In some more preferred embodiments, the carrier includes a car seat, and the seat mechanism is removably or fixedly connected to a base of the car seat.

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

[0052] The seat mechanism of the present invention has multiple usage states, including a zero gravity state, in which the heights 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 a variety of postures such as sitting, zero gravity and lying. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0054] Figure 1 It is a side view of a seat mechanism according to embodiment 1 of the present invention when it is in a sitting state.

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

[0056] Figure 3 It is a side view of a seat mechanism according to embodiment 1 of the present invention when it is in a lying state.

[0057] Figure 4 It is a three-dimensional diagram of a seat mechanism in a sitting state according to Embodiment 1 of the present invention.

[0058] Figure 5 It is a three-dimensional diagram of a seat mechanism according to embodiment 1 of the present invention when it is in a zero gravity state.

[0059] Figure 6 It is a three-dimensional diagram of a seat mechanism according to Embodiment 1 of the present invention when it is in a lying state.

[0060] Figure 7 Schematic diagram of a backrest and an upper driving rod of a seat mechanism according to Embodiment 1 of the present invention.

[0061] Figure 8 Schematic diagram of a connecting seat and a lower driving rod of a seat mechanism according to Example 1 of the present invention.

[0062] Fig. 9 FIG. 1 is a side view of a seat mechanism according to Embodiment 1 of the present invention during a folding process.

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

[0064] Fig.11 It is a three-dimensional diagram of a carrier according to Embodiment 1 of the present invention.

[0065] Fig.12 It is a side view of a vehicle according to Embodiment 1 of the present invention, wherein the seat mechanism is in a sitting position.

[0066] Fig.13 It is a side view of a vehicle according to Embodiment 1 of the present invention, wherein the seat mechanism is in a zero gravity state.

[0067] Fig.14 It is a side view of a carrier according to Embodiment 1 of the present invention, wherein the seat mechanism is in a lying position.

[0068] Fig.15It is a three-dimensional diagram of a seat mechanism in a sitting state according to embodiment 2 of the present invention.

[0069] Fig.16 The figure is an exploded view of a seat, a side base and a backrest connecting rod according to embodiment 2 of the present invention.

[0070] Fig.17 1 is a structural diagram of a backrest and a third locking member according to embodiment 2 of the present invention.

[0071] Fig.18 It is a three-dimensional diagram of a seat mechanism according to embodiment 2 of the present invention when it is in a zero gravity state.

[0072] Fig.19 It is a side view of a seat mechanism according to embodiment 2 of the present invention when it is in a sitting position.

[0073] Fig. 20 1 is a side view of a seat mechanism according to embodiment 2 of the present invention in a zero gravity state.

[0074] Fig.21 It is a side view of a seat mechanism according to embodiment 2 of the present invention when it is in a lying state.

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

[0076] Fig.23 It is a three-dimensional diagram of a carrier according to embodiment 2 of the present invention.

[0077] Fig.24 It is a side view of a vehicle according to embodiment 2 of the present invention, wherein the seat mechanism is in a sitting position.

[0078] Fig.25 It is a side view of a vehicle according to embodiment 2 of the present invention, wherein the seat mechanism is in a zero gravity state.

[0079] Fig.26 It is a side view of a vehicle according to Embodiment 2 of the present invention, wherein the seat mechanism is in a lying position.

[0080] Fig. 27 It is a three-dimensional diagram of a seat mechanism according to embodiment 3 of the present invention.

[0081] Fig.28 It is an exploded view of a seat mechanism according to embodiment 3 of the present invention.

[0082] Fig.29 Schematic diagram of a seat mechanism in a sitting position according to Embodiment 3 of the present invention.

[0083] Fig.30 Schematic diagram of a seat mechanism in a zero gravity state according to Embodiment 3 of the present invention.

[0084] Fig.31 Schematic diagram of a seat mechanism in a lying position according to Embodiment 3 of the present invention.

[0085] Fig.32 Schematic diagram of the position of a seat and a guide block according to Embodiment 3 of the present invention, wherein the seat mechanism is in a sitting position.

[0086] Fig.33 Schematic diagram of the positions of a seat and a guide block according to Embodiment 3 of the present invention, wherein the seat mechanism is in a zero gravity state.

[0087] Fig.34 Schematic diagram of the position of a seat and a guide block according to Embodiment 3 of the present invention, wherein the seat mechanism is in a lying position.

[0088] Fig.35 It is a three-dimensional diagram of a seat mechanism in a sitting state according to embodiment 4 of the present invention.

[0089] Fig.36 It is a three-dimensional diagram of a seat mechanism according to embodiment 4 of the present invention when it is in a zero gravity state.

[0090] Fig.37 It is a three-dimensional diagram of a seat mechanism in a lying state according to embodiment 4 of the present invention.

[0091] Fig.38 1 is a side view of a seat mechanism according to embodiment 4 of the present invention in a zero gravity state.

[0092] Fig.39 Schematic diagram of a seat mechanism in a zero gravity state according to embodiment 4 of the present invention.

[0093] Fig.40 This is an exploded view of a seat mechanism according to embodiment 4 of the present invention when it is in a zero gravity state.

[0094] Figure 41 to Figure 43 These are schematic diagrams of a seat mechanism according to Embodiment 4 of the present invention in a sitting position, a zero gravity position and a lying position, respectively, wherein the guide groove seat is not shown.

[0095] In the above figures,

[0096] 100, seat mechanism; 200, child stroller; 201, frame;

[0097] 1. seat; 2. backrest; 3. leg support; 3a. long slot; 4. seat drive device; 5. leg support drive device;

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

[0099] 21. base; 211. first locking slot; 212. second locking slot; 213. third locking slot; 22. seat rod; 221. track slot; 221a. front end; 221b. corner; 221c. rear end; 222. sleeve; 23. backrest connecting rod; 231. adjustment pin; 232. slide slot; 24. third locking member; 25. backrest rod; 251. mounting slot; 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 portion; 321b. Corner portion; 321c. Rear end portion; 33a. First connecting portion; 33b. Second connecting portion; 33c. Third connecting portion; 34. Connecting rod 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. Rotational joint. DETAILED DESCRIPTION

[0101] The preferred embodiments of the present invention are described in detail below in conjunction with 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 used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, 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 directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the drawings when the seat mechanism is in a sitting state. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0103] Figures 1 to 43 The drawings are drawn in true proportion. To keep the specification concise, the proportions of each component are not listed one by one. However, the proportions and positions of each component should be regarded as part of the content of this specification.

[0104] Example 1

[0105] The present embodiment provides a seat mechanism and a carrier, which is used to carry children and may be a child stroller, a car safety seat, etc.

[0106] Reference Figures 1 to 10 As shown, the seat mechanism 100 mainly includes a seat 1 and a backrest 2, wherein the seat 1 defines a first plane P1 for supporting the thighs of the occupant, and the backrest 2 defines a second plane P2 for supporting the back of the occupant. Figure 2 The seat 1 and the backrest 2 can rotate relative to each other, so that the seat mechanism 100 has at least three use states, including a sitting state (such as Figure 1 As shown), lying position (as shown Figure 3 as shown) and the zero gravity state between the sitting state and the lying state (as shown Figure 2 In each use state, the angle between the seat 1 and the 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 the zero gravity state, 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 state and less than the angle between the first plane P1 and the second plane P2 in the lying state. Figure 2 As shown, in the zero gravity state, the front of the seat 1 is higher than the rear thereof, 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, so that the heart (H1 position) and knees (H2 position) of the passenger are at the same height, and the passenger has the best comfort in this state. The first angle α1 and the second angle α2 are both less than 90 degrees. The first angle α1 is 18 to 40 degrees, preferably 25 to 35 degrees. The second angle α2 is 35 to 55 degrees, preferably 40 to 50 degrees.

[0107] like Figure 1 As shown, in the sitting state, the angle between the first plane P1 and the horizontal plane is smaller than the first angle α1, and the angle between the second plane P2 and the horizontal plane is larger than the second angle α2. That is, in the sitting state, the seat 1 is generally horizontal, or tilted at a small angle (smaller 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; a larger angle (larger than the second angle α2, which can be between 90 and 80 degrees) is formed between the backrest 2 and the horizontal plane. Figure 3As shown, in the lying state, 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 state, the seat 1 is generally horizontal, or tilted at a small angle (smaller than the first angle α1, which can be between 0 and 10 degrees) so that the front part of the seat 1 is slightly higher than the rear part; the backrest 2 forms a small angle with the horizontal plane (smaller than the second angle α2, which can be between 0 and 20 degrees).

[0108] Furthermore, the seat mechanism 100 includes a leg support 3, which can rotate relative to the seat 1, so as to have corresponding different tilt angles in different usage states. The leg support 3 is located in front of the seat 1 and defines a third plane P3 for supporting the calf of the passenger. When the seat mechanism 100 is 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 angle α3 greater than zero relative to the horizontal plane, and the third angle α3 is less than 90 degrees. The third angle α3 is 26 to 40 degrees, preferably 28 to 35 degrees. Figure 2 In the specific example shown, the first angle α1 is 30 degrees, the second angle α2 is 45 degrees, and the third angle α3 is 31 degrees; the angle between the first plane P1 where the seat 1 is located and the second plane P2 where the backrest 2 is located is approximately 105 degrees.

[0109] In by Figure 1 The sitting posture shown is converted into Figure 2 The zero gravity state shown and Figure 3 In the lying state shown, the first angle α1 increases first and then decreases, the second angle α2 decreases successively, the third angle α3 decreases successively, and the angle between the first plane P1 where the seat 1 is located and the second plane P2 where the backrest 2 is located increases successively.

[0110] Furthermore, the seat mechanism 100 also has a folded state, in which the backrest 2 and the seat 1 are close to each other. After the seat mechanism 100 is unfolded, it can be converted into any use state, such as Figure 1 The sitting posture shown, Figure 2 The zero gravity state shown, Figure 3 Lying position shown.

[0111] The lower end of the backrest 2 is connected to the rear of the seat 1 through the 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 the lower end of the backrest 2 or the seat 1 and the leg support 3 are connected with a leg support drive device 5, 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 of this embodiment are described in detail below.

[0112] The seat mechanism 100 includes a connecting seat 11, which fixes the seat mechanism 100 to the supporting part of the vehicle (such as the frame of a stroller, the base of a car safety seat, etc.) or has an interface connected to the supporting part of the vehicle. The rear part 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, and specifically, the rear ends of the seat rods 12 are pivotally connected to the connecting seat 11. The above-mentioned seat drive device 4 includes a backrest drive rod 13, a first drive rod 14, a second drive rod 15 and a third drive rod 16. The backrest 2 is rotatably connected to the connecting seat 11 through the backrest drive rod 13, and the upper part of the backrest drive rod 13 is fixedly connected to the backrest 2 or is integrated. The first end of the first driving rod 14 is rotatably connected to the backrest driving rod 13, the first end of the second driving rod 15 is rotatably connected to the connecting seat 11, the first end of the third driving rod 16 is rotatably connected to the seat rod 12 of the seat 1, and the second end of the first driving rod 14, the second end of the second driving rod 15 and the second end of the third driving rod 16 are rotatably connected. In this embodiment, the above-mentioned driving rods are pivotally connected, and the second end of the first driving rod 14, the second end of the second driving rod 15 and the second end of the third driving rod 16 are pivotally connected. Among them, a four-bar linkage is formed between the seat rod 12, the backrest driving rod 13, the first driving rod 14 and the third driving rod 16. When the backrest 2 is pressed and the backrest driving rod 13 is turned over, the four-bar linkage is deformed, and at the same time, the second driving rod 15 connected to the connecting seat 11 is limited, and the seat 1 can change the angle within the set angle range as the backrest 2 is turned over, thereby realizing posture conversion.

[0113] The seat mechanism 100 further 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 connecting seat 11, the backrest drive rod 13, the first drive rod 14, 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 so that the seat mechanism 100 is stabilized in a sitting state, a zero gravity state or a lying state; in the unlocked state, the first locking member 17 is disengaged from at least two components to release the seat drive device 4 so as to allow the backrest 2 and the seat 1 to rotate relative to each other.

[0114] Furthermore, combined with 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 the upper drive rod 131 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 through 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 is disengaged 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 the second locking member 18 in the locked state deviates from the rotation connection point between the upper driving rod 131 and the lower driving rod 132 .

[0115] Specifically in this embodiment, in the locked state, the first locking member 17 connects the lower driving rod 132 of the backrest driving rod 13 and the connecting seat 11 to lock the backrest driving rod 13 and the connecting seat 11, so that the backrest driving rod 13 cannot flip relative to the connecting seat 11, thereby stabilizing the seat mechanism 100 in a sitting state, a zero gravity state or a lying state. In the unlocked state, the first locking member 17 is disengaged from the lower driving rod 132 and / or the connecting seat 11, and the two can rotate relative to each other, and the seat 1 driving mechanism is released, thereby allowing the above-mentioned four-bar linkage to deform, and the seat 1 and the backrest 2 can rotate relative to each other. Figures 1 to 10 In the specific example shown, the first locking member 17 includes a locking pin; 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, and the first locking hole 111, the second locking hole 112 and the third locking hole 113 rotate along the arc path ( Figure 8 The upper drive rod 131 is arranged in sequence and spaced apart from each other (circular path shown by the dotted line in the middle), and a fourth locking hole 132a is provided on the lower drive rod 132. When the seat mechanism 100 is in the sitting position, the fourth locking hole 132a is aligned with and connected to the first locking hole 111, and 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 the sitting position, as shown in FIG. Figure 4When 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, and the first locking member 17 is inserted into the fourth locking hole 132a and the second locking hole 112 to lock the upper driving rod 131 relative to the connecting seat 11, thereby locking the seat mechanism 100 in a zero gravity state, as shown in FIG. Figure 5 When the seat mechanism 100 is in the lying position, the fourth locking hole 132a and the third locking hole 113 are aligned and connected, and the first locking member 17 is inserted into the fourth locking hole 132a and the third locking hole 113 to lock the upper driving rod 131 relative to the connecting seat 11, thereby locking the seat mechanism 100 in the lying position, as shown in FIG. Figure 6 shown.

[0116] like Figure 7 and Figure 8 As shown, the second locking member 18 includes a stop pin. Stop holes 133 are provided on the upper drive rod 131 and the lower drive rod 132, respectively. When the stop holes 133 on the upper drive rod 131 and the lower drive rod 132 are aligned and connected to each other, the second locking member 18 is inserted into the two stop holes 133, and the upper drive rod 131 and the lower drive rod 132 are locked as one, and the two cannot rotate relative to each other. At this time, the seat mechanism 100 can be in any use state. And, preferably, when the second locking member 18 locks the upper drive rod 131 and the lower drive rod 132 with each other, the center line of the upper drive rod 131 and the center line of 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 of the stop holes 133 of the upper drive rod 131 and / or the lower drive rod 132, and the upper drive rod 131 and the lower drive rod 132 are unlocked, and the two can rotate relative to each other.

[0117] The upper end of the leg support 3 is rotatably connected to the front end of the seat rod 12. The leg support driving device 5 includes a fourth driving rod 19, a first end of the fourth driving rod 19 is rotatably connected to the second driving rod 15 or the third driving rod 16, and a second end of the fourth driving rod 19 is rotatably connected to the leg support 3. Figures 4 to 6 As shown, the first end of the fourth driving rod 19 is pivotally connected between the first end and the second end of the third driving rod 16. When the above-mentioned four-bar linkage of the seat driving device 4 is deformed, the fourth driving rod 19 flips over, pushing the leg support 3 to flip upward relative to the seat rod 12.

[0118] Furthermore, the second end of the fourth driving rod 19 can also slide relative to the leg support 3 to allow the lower end of the leg support 3 and the backrest 2 to move closer to each other after the seat mechanism 100 is folded. Fig. 9 and Fig.10Specifically, the leg support member 3 is provided with a long slot 3a, which extends along the center line of the leg support member 3. A connecting pin 19a is provided on the second end of the fourth driving rod 19, which is inserted into the long slot 3a and configured to be able to rotate in the long slot 3a and slide along the long slot 3a. When the seat mechanism 100 is converted from the sitting state to the folding state, the connecting pin 19a first slides from the lower end of the long slot 3a to the upper end thereof, as shown in FIG. Fig. 9 Subsequently, the leg support member 3 is flipped upward to bring it and the backrest 2 closer together to reduce 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 slot 3a to its lower end, at which time the upper end of the long slot 3a may be substantially flush with its lower end.

[0119] This embodiment also provides a carrier 200, which can be Figures 11 to 14 Stroller shown. Figures 11 to 14 As shown, the child stroller includes a frame 201 and wheels arranged 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 has three use states after unfolding: sitting, zero gravity and lying, as shown in FIG. Fig.12 , Fig.13 and Fig.14 shown.

[0120] The process of switching the seat mechanism 100 between the three use states is as follows:

[0121] When the seat mechanism 100 is in a sitting state, the second locking member 18 is kept in its locking state, and the first locking member 17 is pulled out from the second locking hole 112 of the lower driving rod 132 and / or the first locking hole 111 of the connecting seat 11 to unlock the seat driving device 4; the backrest 2 is pressed downward, the four-bar mechanism of the seat driving device 4 is deformed, and the seat rod 12 is flipped accordingly, and its front part is lifted upward, and at the same time, the fourth driving rod 19 pushes the leg support member 3 to flip upward; until the fourth locking hole 132a on the lower driving rod 132 moves to align 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, and the seat mechanism 100 is locked in the zero gravity state, thereby realizing the conversion from the sitting state to the zero gravity state. The conversion process from the sitting state or the zero gravity state to the lying state is similar to the above process, the difference is that after the fourth locking hole 132a and the third locking hole 113 on the connecting seat 11 are aligned, the first locking member 17 is inserted into the fourth locking hole 132a and the third locking hole 113.

[0122] When the seat mechanism 100 is in a lying state, the second locking member 18 is kept in its locked state, and the first locking member 17 is pulled out from the second locking hole 112 of the lower driving rod 132 and / or the third locking hole 113 of the connecting seat 11 to unlock the seat driving device 4; the backrest 2 is pushed upward, the four-bar mechanism of the seat driving device 4 is deformed, and the seat rod 12 flips accordingly, and its front part flips downward, and at the same time, the fourth driving rod 19 pulls the leg support member 3 to flip downward; until the fourth locking hole 132a on the lower driving rod 132 moves to align 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, and the seat mechanism 100 is locked in a zero gravity state, thereby realizing the conversion from the lying state to the zero gravity state. The conversion process from the lying state or the zero gravity state to the sitting state is similar to the above process, the difference is that after the fourth locking hole 132a and the first locking hole 111 on the connecting seat 11 are aligned, the first locking member 17 is inserted into the fourth locking hole 132a and the first locking hole 111.

[0123] The folding process of the seat mechanism 100 is as follows:

[0124] Put the seat mechanism 100 in a sitting position, pull out the second locking member 18 from the limiting hole 133 of the upper driving rod 131 and / or the lower driving rod 132, unlock the backrest driving rod 13, and push the backrest 2 forward to make it close to the seat 1 until Fig. 9 The leg support 3 is flipped upwards so that its lower end is close to the backrest 2, and finally converted to Fig.10 Shown in folded state.

[0125] The seat mechanism 100 has the following advantages: the seat mechanism 100 has multiple use states, including a zero gravity state, in which the heart and knee heights of the occupant are substantially the same, the occupant has the best comfort in this posture, and it is easy to use, allowing children in the seat mechanism 100 to have multiple postures; the seat mechanism 100 can be switched between multiple use states such as sitting, zero gravity and lying by operating the backrest 2, and the switching operation is convenient; in different use states, the angle of the leg support 3 also automatically changes accordingly, providing corresponding support for the calf, further helping to improve the riding comfort, and it is easy to use.

[0126] Example 2

[0127] This embodiment provides a Figures 15 to 22 The seat mechanism 100 and a carrier are shown, and the carrier is used to carry children, and can be a child stroller, a car safety seat, etc. The carrier 200 can be Figure 23 to Figure 26 The stroller shown.

[0128] Reference Figures 15 to 22As shown, similar to the first embodiment, the seat 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 thighs of the occupant, and the backrest 2 defines a second plane P2 for supporting the back of the occupant. The leg support 3 is located at the front side of the seat 1 and defines a third plane P3 for supporting the calves of the occupant. Fig. 20 The seat 1 and the 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 use states, including a sitting state (such as Fig.19 As shown), lying position (as shown Fig.21 as shown) and the zero gravity state between the sitting state and the lying state (as shown Fig. 20 As shown in Fig. 20 As shown, in the zero gravity state, the front end of the seat 1 is higher than the rear end thereof, 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, so that the heart (H1 position) and knees (H2 position) of the passenger are at the same height. In this state, the passenger has the best comfort. The first angle α1, the second angle α2, and the third angle α3 are all less than 90 degrees. The first angle α1 is 18 to 40 degrees, preferably 25 to 35 degrees. The second angle α2 is 35 to 55 degrees, preferably 40 to 50 degrees. The third angle α3 is 26 to 40 degrees, preferably 28 to 35 degrees. Fig. 20 In the specific example shown, the first angle α1 is 30 degrees, the second angle α2 is 45 degrees, and the third angle α3 is 31 degrees; the angle between the first plane P1 where the seat 1 is located and the second plane P2 where the backrest 2 is located is approximately 105 degrees.

[0129] In by Fig.19 The sitting posture shown is converted into Fig. 20 The zero gravity state shown and Fig.21 In the lying state shown, the first angle α1 increases first and then decreases, the second angle α2 decreases successively, the third angle α3 decreases successively, and the angle between the first plane P1 where the seat 1 is located and the second plane P2 where the backrest 2 is located increases successively.

[0130] The lower end of the backrest 2 is connected to the rear of the seat 1 through the 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 to 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 the first embodiment 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 of this embodiment are described in detail below.

[0131] The seat mechanism 100 includes a base 21, which is a part of a support portion of a vehicle 200 (e.g., a frame 201 of a stroller, a base of a car safety seat, etc.) or is detachably connected to the support portion of the vehicle 200, so that the seat mechanism 100 is installed on the support portion of the vehicle 200. The seat 1 includes a seat rod 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 the pivot a1. The seat driving 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 rod 25, and the backrest link 23 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 the 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, the seat rod 22 is driven to rotate, thereby changing the use state of the seat mechanism 100. Fig.16 , Figures 19 to 21 As shown, the seat rod 22 is provided with a track groove 221, and the backrest connecting rod 23 is provided with an adjustment pin 231, and the adjustment pin 231 is slidably inserted in the track groove 221, and the seat rod 22 and the backrest connecting rod 23 are connected rotatably and slidably only through the adjustment pin 231. When the backrest 2 rotates, the adjustment 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 pivot a1, the pivot a2 and the adjustment 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 adjustment pin 231 slides along the track groove 221, driving the seat rod 22 to make a circular motion around the pivot a1, and the seat rod 22 is then flipped relative to the base 21, thereby changing the angle of the seat rod 22 relative to the horizontal plane.

[0132] like Fig.16As shown, the track groove 221 has a front end 221a, a rear end 221c, and a corner portion 221b located between the front end 221a and the rear end 221c, and the corner portion 221b is located at the rear side of the front end 221a and at the upper side of the rear end 221c. The track groove 221 is L-shaped as a whole. When the seat mechanism 100 is in the lying state, the adjustment pin 231 is located in the front end 221a of the track groove 221, as shown in FIG. Fig.21 When the seat mechanism 100 is in a zero gravity state, the adjustment pin 231 is located in the corner portion 221b, as shown in FIG. Fig. 20 When the seat mechanism 100 is in the sitting position, the adjustment pin 231 is located in the rear end portion 221c, as shown in FIG. Fig.19 shown.

[0133] The seat mechanism 100 further includes a third locking member 24. In a 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 an 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 a locked state, and release the base 21 and the seat rod 22 in an unlocked state. Specifically, in the example shown in the drawings, the third locking member 24 includes a sliding pin, and the third locking member 24 is slidably disposed on the backrest link 23. Specifically, a slide groove 232 extending along the length direction of the backrest link 23 is provided, and the third locking member 24 is slidably inserted in the slide groove 232. The base 21 is provided with a plurality of locking grooves arranged in sequence along the outer circumference of the base 21. When the seat mechanism 100 is in any use state, the third locking member 24 is inserted into the slide groove 232 and one of the locking grooves. When the third locking member 24 and the locking groove are disengaged, the seat mechanism 100 is allowed to switch the use state. Fig.16 As shown, the outer peripheral surface of the base 21 is provided with a first locking groove 211, a second locking groove 212 and a third locking groove 213, which extend inward from the outer peripheral edge of the base 21, thereby allowing the third locking member 24 to enter and exit any locking groove. The first locking groove 211, the second locking groove 212 and the third locking groove 213 are arranged at intervals.

[0134] Furthermore, the third locking member 24 can also lock and unlock the backrest connecting rod 23 and the backrest rod 25 with each other. After the seat mechanism 100 is unfolded, no matter what use state it is in or during the conversion process of different use states, the third locking member 24 always connects the backrest rod 25 and the backrest connecting rod 23. When the seat mechanism 100 needs to be folded, the third locking member 24 is in the unlocked state, and the third locking member 24 and the backrest connecting rod 23 are disengaged, allowing the backrest rod 25 to flip forward relative to the backrest connecting rod 23 to move closer to the seat 1. The third locking member 24 is installed on the backrest rod 25 and can slide relative to the backrest rod 25. Specifically, as Fig.17 As shown, the backrest rod 25 is provided with a mounting groove 251 extending along its length direction, and the third locking member 24 is slidably arranged 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. Fig.16 As shown, the slide groove 232 extends downward from the upper edge of the backrest connecting rod 23 and is U-shaped as a whole. Figures 19 to 21 In any of the use states shown or in the process of switching between different use states, the third locking member 24 will not be separated from the slide slot 232. When the seat mechanism 100 needs to be folded, as shown in FIG. Fig. 22 As shown, the third locking member 24 is moved upward to disengage from the slide slot 232, at which 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 to achieve folding.

[0135] The upper end of the leg support 3 is connected to the front part of the seat 1 by pivoting. The leg support driving 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 connecting rod 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 connecting rod 23 rotates, the first push rod 26 rotates accordingly, and then the leg support 3 is pushed to flip and change the angle through the second push rod 27 and the third push rod 28. Among them, the second push rod 27 can be slidably arranged on the seat 1 in the front-back direction. Specifically, a sliding sleeve 222 is provided on the seat rod 22, and the second push rod 27 can slide through the sliding sleeve 222 in the front-back direction.

[0136] Furthermore, the second end of the third push rod 28 can slide relative to the leg support 3 to allow the lower end of the leg support 3 and the backrest 2 to move closer to each other after the seat mechanism 100 is folded. Fig. 22Specifically, the leg support member 3 is provided with a long slot 3a, and the long slot 3a extends along the center line of the leg support member 3. A connecting pin 281 is provided on the second end of the third push rod 28, and the connecting pin 281 is inserted into the long slot 3a and configured to be able to rotate in the long slot 3a and slide along the long slot 3a. When the seat mechanism 100 is converted from the sitting state to the folding state, the connecting pin 281 slides from the lower end of the long slot 3a to the upper end thereof, as shown in FIG. Fig. 22 shown.

[0137] This embodiment also provides a carrier 200, which can be Figure 23 to Figure 26 Stroller shown. Figure 23 to Figure 26 As shown, the child stroller includes a frame 201 and wheels arranged at the bottom of the frame 201. The base 21 of the seat mechanism 100 is fixed to the frame 201 and is a part of the frame 201, for example, it can be a 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 has three use states after unfolding: sitting, zero gravity and lying, as shown in FIG. Fig.24 , Fig.25 and Fig.26 shown.

[0138] The process of switching the seat mechanism 100 between the three use states is as follows:

[0139] When the seat mechanism 100 is in the sitting position, the third locking member 24 is inserted into the mounting groove 251, the slide groove 232 and the first locking groove 211 to lock the seat mechanism 100 in the sitting position; when the third locking member 24 is moved upward, it is disengaged from the first locking groove 211 and moves along the outer peripheral surface of the base 21 between the first locking groove 211 and the second locking groove 212. During this process, the third locking member 24 is still in the slide groove 232 and the mounting groove 251; then, the backrest 2 is pressed downward, and the backrest connecting rod 23 is relative to the base. The seat 21 rotates upward, driving the adjustment pin 231 to slide from the rear end of the track groove 221 to the corner of the track groove 221, and the seat rod 22 rotates around the base 21, and its front side is lifted upward. 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 member 3 to flip upward; until the third locking member 24 slides to the top of the second locking groove 212 and falls into the second locking groove 212, the seat mechanism 100 is locked in the zero gravity state, and the conversion from the sitting state to the zero gravity state is realized. The conversion process from the sitting state or the zero gravity state to the lying state is similar to the above process, except that the third locking member 24 slides to the top of the third locking groove 213 and falls into the third locking groove 213, and the seat mechanism 100 is locked in the lying state.

[0140] When the seat mechanism 100 is in the lying state, the third locking member 24 is inserted into the installation groove 251, the slide groove 232 and the third locking groove 213 to lock the seat mechanism 100 in the lying state; when the third locking member 24 is moved upward, it is disengaged from the third locking groove 213 and moves along the outer peripheral surface of the base 21 between the third locking groove 213 and the second locking groove 212. During this process, the third locking member 24 is still in the slide groove 232 and the installation groove 251; then, the backrest 2 is pushed upward, and the backrest connecting rod 23 is relative to the base. The seat 21 rotates downward, driving the adjustment pin 231 to slide from the front end of the track groove 221 to the corner of the track groove 221, and the seat rod 22 rotates around the base 21, and its front side flips downward. 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 member 3 to flip downward; until the third locking member 24 slides to the top of the second locking groove 212 and falls into the second locking groove 212, the seat mechanism 100 is locked in the zero gravity state, and the conversion from the lying state to the zero gravity state is realized. The conversion process from the lying state or the zero gravity state to the sitting state is similar to the above process, except that the third locking member 24 slides to the top of the first locking groove 211 and falls into the first locking groove 211, and the seat mechanism 100 is locked in the sitting state.

[0141] The folding process of the seat mechanism 100 is as follows:

[0142] The seat mechanism 100 is placed in a sitting position, the third locking member 24 is moved upward to disengage the third locking member 24 from the slide slot 232, the backrest rod 25 and the backrest connecting rod 23 are unlocked, and the backrest rod 25 is pushed forward to move it closer to the seat 1, and the seat mechanism 100 is switched to the sitting position. Fig. 22 Shown in folded state.

[0143] The seat mechanism 100 has the following advantages: the seat mechanism 100 has multiple use states, including a zero gravity state, in which the heart and knee heights of the occupant are substantially the same, the occupant has the best comfort in this posture, and it is easy to use, allowing children in the seat mechanism 100 to have multiple postures; the seat mechanism 100 can be switched between multiple use states such as sitting, zero gravity and lying by operating the backrest 2, and the switching operation is convenient; in different use states, the angle of the leg support 3 also automatically changes accordingly, providing corresponding support for the calf, further helping to improve the riding comfort, and it is easy to use.

[0144] Example 3

[0145] This embodiment provides a Figures 27 to 34 The seat mechanism 100 and a carrier shown are used to carry children and may be a child stroller, a car safety seat, etc.

[0146] Reference Figures 27 to 31As shown, similar to the first embodiment, the seat mechanism 100 mainly includes a seat 1, a backrest 2 and a leg support 3. The seat 1 includes a seat plate, which defines a first plane P1 for supporting the thighs of the occupant; the backrest 2 includes a backrest 2 plate, which defines a second plane P2 for supporting the back of the occupant. The leg support 3 is located at the front side of the seat 1, and the leg support 3 includes a leg plate, which defines a third plane P3 for supporting the calves of the occupant, as shown in FIG. Fig.30 The seat 1 and the 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 use states, including a sitting state (such as Fig.29 As shown), lying position (as shown Fig.31 as shown) and the zero gravity state between the sitting state and the lying state (as shown Fig.30 As shown in Fig.30 As shown, in the zero gravity state, the front end of the seat 1 is higher than the rear end thereof, 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, so that the heart (H1 position) and knee (H2 position) of the passenger are at the same height, and the passenger has the best comfort in this state. The first angle α1 is 18 to 40 degrees, the second angle α2 is 35 to 55 degrees, and the third angle α3 is 26 to 40 degrees.

[0147] like Fig.29 As shown, in the sitting state, 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. Fig.31 As shown, in the lying state, 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 smaller than the second angle α2, and the angle between the third plane P3 and the horizontal plane is smaller than the third angle α3.

[0148] In this embodiment, a seat drive device 4 is provided between the backrest 2 and the seat 1 to drive the seat 1 to rotate when the backrest 2 rotates. The main differences between this embodiment and the first embodiment are: (1) the seat drive device 4; (2) the upper end of the leg support 3 is connected to the front part 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 adjusted manually; (3) the seat mechanism 100 is not foldable. The structure and driving principle of the seat drive device 4 of this embodiment are described in detail below.

[0149] The seat drive device 4 includes a fixing seat 31, which is used to fix the seat mechanism 100 on a supporting part of a vehicle (such as a frame of a stroller, a base of a car safety seat, etc.). Fig.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. Figure 29 to Figure 31 , the first connection part 33a of the backrest 2 is rotatably connected to the fixed seat 31; specifically, the first connection part 33a is rotatably connected to the fixed seat 31 through a pivot a11. The second connection part 33b of the backrest 2 is rotatably connected to the seat 1; specifically, the second connection part 33b is rotatably connected to the seat 1 through a pivot a12. The seat 1 is slidably arranged on the fixed seat 31. Among them, 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 in the guide groove 321 and can slide forward and backward along the guide groove 321. The shape of the guide groove 321 is configured such that during the forward sliding process of the guide block 30, the angle of the seat plate relative to the horizontal plane increases first and then decreases, and the angle of the leg support member 3 relative to the horizontal plane gradually decreases. Specifically in this embodiment, a guide groove seat 32 is arranged on the fixed seat 31, and the guide groove 321 is arranged on the guide groove seat 32. The guide groove seat 32 remains fixed relative to the fixed seat 31, and there is no relative slip between the two. The guide block 30 is fixed on the seat 1 .

[0150] Furthermore, the guide slot 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, and the corner portion 321b is 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 moves in a circle around the pivot a11, and the second connecting portion 33b and the pivot a12 move in a circle accordingly, thereby driving the seat 1 to move relative to the fixed seat 31. When the seat mechanism 100 is in a lying state, the guide block 30 is located in the front end portion 321a of the guide slot 321, as shown in FIG. Fig.31 and Fig.34 When the seat mechanism 100 is in a zero gravity state, the guide block 30 is located in the corner portion 321b, as shown in FIG. Fig.30 and Fig.33 When the seat mechanism 100 is in the sitting position, the guide block 30 is located in the rear end portion 321c, as shown in FIG. Fig.29 and Fig.32 shown.

[0151] A locking member (not shown) is provided between the backrest 2 and the fixing seat 31, and the backrest 2 and the fixing seat 31 are connected by the locking member to lock the seat mechanism 100 in any use state. If the locking member is separated from the backrest 2 and / or the fixing seat 31, it is in an unlocked state, and the seat mechanism 100 can be switched between three use states.

[0152] The seat 1 and the leg support 3 are respectively connected to two parts of the rotating joint 35. After the rotating joint 35 is unlocked, the leg support 3 can be rotated relative to the seat 1, so as to adjust the angle of the leg support 3; after the adjustment is completed, the rotating joint 35 locks the leg support 3 and the seat 1. The specific structure of the rotating joint 35 is not the key point of the invention of this application, and it can adopt a structure known in the prior art, such as the electric bell structure disclosed in patent CN216861575U.

[0153] The seat mechanism 100 of this embodiment can be used as a seat pocket of a child carrier. If the child carrier is a child stroller, the fixing seat 31 of the seat mechanism 100 is installed on the vehicle frame 201. If the child carrier is a car safety seat, the fixing seat 31 of the seat mechanism 100 is installed on the base of the car safety seat.

[0154] The process of switching the seat mechanism 100 between the three use states is as follows:

[0155] When the seat mechanism 100 is in the sitting state, the backrest 2 and the fixed seat 31 are unlocked, the backrest 2 is pressed downward, the backrest 2 rotates around the pivot a11, and the second connecting portion 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 portion 321b, and the seat mechanism 100 is in the zero gravity state, realizing the conversion from the sitting state to the zero gravity state. The conversion process from the sitting state or the zero gravity state to the lying state 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 the lying state. In the above process, the angle of the leg support 3 is manually adjusted by flipping the leg support 3 after unlocking the rotating joint 35.

[0156] When the seat mechanism 100 is in the lying state, the backrest 2 and the fixed seat 31 are unlocked, the backrest 2 is pushed upward, the backrest 2 rotates around the pivot a11, and the second connecting portion 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 portion 321b, and the seat mechanism 100 is in the zero gravity state, realizing the conversion from the lying state to the zero gravity state. The conversion process from the lying state or the zero gravity state to the 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 the sitting state. In the above process, the angle of the leg support 3 is manually adjusted by unlocking the rotating joint 35 and flipping the leg support 3.

[0157] The seat mechanism 100 has the following advantages: the seat mechanism 100 has multiple usage states, including a zero gravity state, in which the heart and knee heights of the occupant are substantially the same, the occupant has optimal comfort in this posture, and it is easy to use, allowing children in the seat mechanism 100 to have multiple postures; the seat mechanism 100 can be switched between multiple usage states such as sitting, zero gravity and lying by operating the backrest 2, 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 calf, which is further conducive to improving the riding comfort.

[0158] Example 4

[0159] Reference Figures 35 to 43 As shown, the difference between the embodiment 4 and the embodiment 3 is that a leg support member driving device 5 is provided between the leg support member 3 and the backrest 2, and the angle of the leg support member 3 can be automatically adjusted as the backrest 2 rotates. The seat driving device 4 is basically the same as the embodiment 3. The structure and driving principle of the leg support member driving device 5 are described in detail below.

[0160] The leg support member driving device 5 includes a connecting rod assembly 34, which is rotatably connected between the backrest 2 and the leg support member 3. The connecting rod assembly 34 includes a plurality of linkage rods that are rotatably connected to each other. The connecting rod assembly 34 may include a first linkage rod 341, a second linkage rod 342, and a third linkage rod 343. Among them, the first end of the first linkage rod 341 is rotatably connected to the leg support member 3; the second linkage rod 342 can be slidably arranged on the seat 1 along the front-rear direction, the first end (front end) of the second linkage rod 342 is rotatably connected to the second end of the first linkage rod 341, and the second end (rear end) of the second linkage rod 342 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 accompanying drawings, the second end of the third linkage rod 343 is rotatably connected to the backrest 2 through a fourth linkage rod 344. Specifically, as Fig.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 rod 344 is connected to the second connecting portion 33b. Preferably, the first end of the fourth linkage rod and the second connecting portion 33b and the seat 1 are simultaneously pivoted through the pivot a12; the second end (lower end) of the fourth linkage rod 344 is connected to the third connecting portion 33c, and the second end of the third linkage rod 343 is connected to the second end of the fourth linkage rod 344. The fourth linkage rod 344 strengthens the backrest 2, especially the part of the backrest 2 used to apply forward thrust or backward pulling force to the linkage assembly 34.

[0161] The seat 1 is provided with a limiting groove, which is configured to limit the second linkage rod 342 to slide only relative to the seat 1. Specifically, Fig.40 As shown, the seat 1 is provided with a first limiting groove 345 and a second limiting groove 346 extending substantially in the front-rear direction, and the first limiting groove 345 and the second limiting groove 346 are respectively located at the front and rear sides of the guide block 30. The first linking rod 341 and the second linking rod 342 are pivotally connected, and the pivot connecting the two is inserted in the first limiting groove 345 and can move forward and backward in the first limiting groove 345. The second linking rod 342 and the third linking rod 343 are pivotally connected, and the pivot connecting the two is inserted in the second limiting groove 346 and can move forward and backward in the second limiting groove 346. The movement direction of the second linking rod 342 is limited by the limiting groove, so that the leg support member 3 can be driven to flip when the backrest 2 flips.

[0162] The conversion process of the seat 1 angle of the seat mechanism 100 is the same as that of Embodiment 3, and will not be described in detail here. The conversion process of the angle of the leg support foot during the conversion of the three use states is described in detail below.

[0163] When the seat mechanism 100 is in a sitting state or a zero gravity state, the backrest 2 is pressed downward, and the fourth linkage rod 344 rotates around the pivot a11, driving the third linkage rod 343 to rotate forward, and the second linkage rod 342 slides forward, and the first linkage rod 341 then turns forward and upward to push the leg support 3 to turn upward, so that the leg support 3 is tilted upward and the angle relative to the horizontal plane is reduced.

[0164] When the seat mechanism 100 is in a lying state or a zero gravity state, the backrest 2 is pushed upward, the fourth linkage rod 344 rotates 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 flip downward, so that the leg support 3 falls and the angle relative to the horizontal plane increases.

[0165] The seat mechanism 100 has the following advantages: the seat mechanism 100 has multiple usage states, including a zero gravity state, in which the heart and knee heights of the occupant are substantially the same, the occupant has optimal comfort in this posture, and it is easy to use, allowing children in the seat mechanism 100 to have multiple postures; the seat mechanism 100 can be switched between multiple usage states such as sitting, zero gravity and lying by operating the backrest 2, and the switching operation is convenient; in different usage states, as the backrest 2 is flipped, the angle of the leg support 3 can be automatically adjusted to provide corresponding support for the calf, further helping to improve the riding comfort.

[0166] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0167] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. If a definition used herein conflicts or is inconsistent with a definition in other public documents, the definition used herein shall prevail.

[0168] It should also be noted that the "rotational connection" in the above embodiments refers to a pivot connection, unless the context clearly indicates other rotational connection methods.

[0169] As shown in this specification and claims, the terms "comprises" and "includes" 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 device may also include other steps or elements.

[0170] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

[0171] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0172] The above embodiment is only for illustrating the technical concept and features of the present invention, and is a preferred embodiment. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention.

Claims

1. A seat mechanism, It is characterized in that The utility model comprises a seat and a backrest capable of rotating relative to the seat, wherein the seat defines a first plane for supporting the thighs of an occupant, and the backrest defines a second plane for supporting the back of the occupant; The seat mechanism has at least three usage states, which include a sitting state, a lying state and a zero gravity state between the sitting state and the lying state. 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 smaller than the angle between the first plane and the second plane in the lying state. In the zero gravity state, the front of the seat is higher than the back of the seat, 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 heart and knees of the occupant are at the same height.

2. The seat mechanism according to claim 1, It is characterized in that The seat mechanism comprises a leg support member which can rotate relative to the seat, the leg support member is located at the front side of the seat and defines a third plane for supporting the calves of the occupant, when the seat mechanism is in the zero gravity state, the lower end of the leg support member is located at the front side of the upper end thereof, and the third plane has a third angle greater than zero relative to the horizontal plane.

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

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

5. The seat mechanism according to claim 2, It is characterized in that The upper end of the leg support is rotatably connected to the front portion of the seat, and a leg support driving device is connected between the lower end of the backrest or the seat and the leg support to rotate the leg support when the backrest or the seat rotates; or, the upper end of the leg support is connected to the front end of the seat through a swivel joint to allow the leg support to be rotated after the swivel joint is unlocked.

6. The seat mechanism according to claim 1, It is characterized in that The lower end of the backrest is connected to the rear of the seat through a seat driving device so that the seat can rotate along with the backrest when the backrest rotates.

7. The seat mechanism according to claim 6, It is characterized in that The seat mechanism includes a connecting seat, and the rear portion of the seat is rotatably connected to the connecting seat; The seat driving device comprises: A backrest driving rod, through which the backrest is rotatably connected to the connecting seat; a first drive rod having a first end portion rotatably connected to the backrest drive rod; A second driving rod having a first end portion rotatably connected to the connecting seat; a third drive rod having a first end rotatably connected to the seat; Wherein, the second end of the first driving rod, the second end of the second driving rod and the second end of the third driving rod are rotatably connected; The seat mechanism also 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 of the connecting seat, the backrest drive rod, the first drive rod, the first drive rod, the second drive rod, the third drive rod and the connecting seat to lock the seat drive device so that the seat mechanism is stabilized in the sitting state, the zero gravity state or the lying state; in the unlocked state, the first locking member disengages from the at least two components to release the seat drive device to allow the backrest and the seat to rotate relative to each other.

8. The seat mechanism according to claim 7, It is characterized in that The backrest drive rod comprises: An upper driving rod, which is fixedly connected to the lower end of the backrest or is integral with the backrest, and the upper driving rod is rotatably connected to the connecting seat; A lower driving rod having a first end rotatably connected to the connecting seat and / or the upper driving rod and a second end rotatably connected to the first end of the first driving rod; The seat mechanism also includes a second locking member, which has 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 is disengaged 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 seat mechanism.

9. The seat mechanism according to claim 8, It is characterized in that The seat mechanism also includes a leg support that can rotate relative to the seat and a leg support driving 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 calf of the occupant; the leg support driving device includes a fourth driving rod, a first end of the fourth driving rod is rotatably connected to the second driving rod or the third driving rod, and a second end of the fourth driving rod is rotatably connected to the leg support.

10. The seat mechanism according to claim 9, It is characterized in that The second end of the fourth driving rod is rotatably and slidably connected to the leg support member to allow the lower end of the leg support member and the backrest to move closer to each other after the seat mechanism is folded.

11. The seat mechanism according to claim 6, It is characterized in that The seat mechanism comprises a base, the seat comprises a seat rod, and the seat rod is rotatably connected to the base; The seat driving device includes a backrest connecting rod connected to the backrest, and the backrest connecting rod is rotatably connected to the base; The seat rod and the backrest connecting rod are slidably and rotatably connected, so that when the backrest connecting rod rotates with the backrest, the seat rod is driven to rotate, so that the seat mechanism is switched to a use state.

12. The seat mechanism according to claim 11, It is characterized in that The seat rod is provided with a track groove, and the backrest connecting rod is provided with an adjustment pin, and the adjustment pin is slidably inserted into the track groove to connect the seat rod and the backrest connecting rod through the adjustment pin; the track groove has a front end portion, a rear end portion, and a corner portion located between the front end portion and the rear end portion, the corner portion is located at the rear side of the front end portion and at the upper side of the rear end portion, the adjustment pin is located in the front end portion when the seat mechanism is in a lying state, the adjustment pin is located in the corner portion when the seat mechanism is in a zero gravity state, and the adjustment pin is located in the rear end portion when the seat mechanism is in a sitting state; The seat mechanism also includes a third locking piece, which is movably arranged on the backrest connecting rod. The base is provided with a plurality of locking grooves arranged in sequence along the outer circumferential direction of the base. When the seat mechanism is in any use state, the third locking piece is inserted into one of the locking grooves. When the third locking piece and the locking grooves are disengaged, the seat mechanism is allowed to change the use state.

13. The seat mechanism according to claim 12, It is characterized in that The seat mechanism further includes a leg support member capable of rotating relative to the seat and a leg support member driving device for driving the leg support member to rotate, wherein the upper end portion of the leg support member is rotatably connected to the front portion of the seat and defines a third plane for supporting the calf of the occupant; The leg support driving device comprises: a first push rod having a first end portion rotatably connected to the backrest connecting rod; a second push rod having a first end portion rotatably connected to the second end portion of the first push rod; a third push rod having a first end portion rotatably connected to the second end portion of the second push rod; Wherein, the second end of the third push rod is rotatably connected to the leg support; The second push rod is slidably arranged on the seat in the front-rear 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 move closer to each other after the seat mechanism is folded; The third locking member is slidably mounted on the backrest, and a slide groove is provided on the backrest connecting rod. In any of the usage states, the third locking member is inserted into the slide groove and one of the locking grooves. The third locking member also has a position that is disengaged from the slide groove and each of the locking grooves to allow the backrest to be flipped relative to the backrest connecting rod, thereby folding or unfolding the seat mechanism.

14. The seat mechanism according to claim 6, It is characterized in that The seat driving device includes a fixed seat, a first connection portion of the backrest is rotatably connected to the fixed seat, the seat is slidably arranged on the fixed seat, and a second connection portion of the backrest is rotatably connected to the seat, and the second connection portion and the first connection portion are arranged at intervals; a guide groove is provided on one of the fixed seat and the seat, and a guide block is provided on the other, the guide groove has a front end portion, a rear end portion and a corner portion located between the front end portion and the rear end portion, the corner portion is higher than the front end portion and the rear end portion, the guide block is located in the front end portion when the seat mechanism is in a lying state, the guide block is located in the corner portion when the seat mechanism is in a zero gravity state, and the guide block is located in the rear end portion when the seat mechanism is in a sitting state.

15. The seat mechanism according to claim 14, It is characterized in that The seat mechanism further comprises a leg support member capable of rotating relative to the seat and a leg support member driving device for driving the leg support member to rotate, wherein the leg support member defines a third plane for supporting the calf of an occupant; The upper end of the leg support is rotatably connected to the front part of the seat, and the leg support driving device includes a connecting rod assembly, which is rotatably connected to the second connecting part and the leg support, and the connecting rod assembly includes a plurality of linkage rods rotatably connected to each other; The link assembly includes a first linkage rod rotatably connected to the leg support, a second linkage rod slidably connected to the seat in the front-rear 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 piece is arranged between the backrest and the fixing seat, and when the locking piece is in an unlocked state, the seat mechanism is allowed to switch to a use state.

16. The seat mechanism according to claim 1, It is characterized in that The seat mechanism also has a folded state, in which the backrest and the seat are close to each other; in the sitting state, 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 state, 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, It is characterized in that Comprising a seat mechanism as claimed in any one of claims 1 to 16.

18. The carrier according to claim 17, It is characterized in that The carrier comprises a baby carriage, the baby carriage comprising a frame and wheels disposed at the bottom of the frame, the seat mechanism being removably or fixedly connected to the frame; Alternatively, the carrier includes a car seat, and the seat mechanism is removably or fixedly connected to a base of the car seat.

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