Seat mechanism and carrier

Abstract

The utility model discloses a seat mechanism and a carrier. The seat mechanism comprises a connecting seat, a seat and a backrest capable of rotating relative to the seat, the seat and the backrest are rotationally connected to the connecting seat, the seat defines a first plane used for supporting thighs of a passenger, and the backrest defines a second plane used for supporting the back of the passenger. The seat mechanism further comprises a jacking connecting rod set, the jacking connecting rod set is rotationally connected between the backrest and the seat so that when the backrest rotates, the seat can be jacked upwards and turned over to convert the seat mechanism into a zero-gravity state, and in the zero-gravity state, the front portion of the seat is higher than the rear portion of the seat. The first plane has a first included angle larger than zero relative to the horizontal plane, and the second plane has a second included angle larger than zero relative to the horizontal plane, so that the heart and the knees of a passenger are located at the same height. According to the seat mechanism and the carrier, the zero-gravity state can be switched by rotating the backrest, switching is convenient, and excellent comfort is achieved in the zero-gravity state.

Description

TECHNICAL FIELD

[0001] The utility model relates to a seat mechanism and a carrier, such as a child stroller. BACKGROUND

[0002] The seat mechanism is one of indispensable components of a child carrier such as a child stroller or a car safety seat. A common seat mechanism includes a seat and a backrest. The seat is used to support the buttocks and thighs of a child, and the backrest is used to support the back of the child. In order to improve the comfort of use, some seat mechanisms have an adjusting mechanism between the seat and the backrest, which can adjust the angle between the seat and the backrest. Thus, the seat mechanism can be converted in posture, such as being converted between a sitting posture and a lying posture and other use states. When the seat mechanism is in an intermediate state between the sitting posture and the lying posture, the angle of the seat, the angle of the backrest, and the angle between the seat and the backrest are crucially important to the comfort of use.

[0003] The above information disclosed in the background section is only intended to strengthen the understanding of the background of the present application, and therefore it can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0004] The utility model relates to a seat mechanism and a carrier, which can be switched to a zero-gravity state by rotating the backrest, is convenient to convert, and has excellent comfort in the zero-gravity state.

[0005] The utility model adopts the following technical scheme:

[0006] A seat mechanism includes a connecting seat, a seat, and a backrest that can rotate relative to the seat. The seat and the backrest are respectively rotatably connected to the connecting seat. 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.

[0007] The seat mechanism further includes a jacking linkage set that is rotatably connected between the backrest and the seat. When the backrest is rotated, the jacking linkage set jacks up and flips the seat upward to convert the seat mechanism to a zero-gravity state. In the zero-gravity state, the front of the seat is higher than the back, the first plane has a first included angle greater than zero relative to the horizontal plane, and the second plane has a second included angle greater than zero relative to the horizontal plane, so that the heart and knees of the occupant are at the same height.

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

[0009] More preferably, the first included angle is 25-35 degrees, and the second included angle is 40-50 degrees.

[0010] In some preferred embodiments, the lifting linkage comprises:

[0011] a backrest driving rod, the backrest being pivotally connected to the connecting seat by the backrest driving rod;

[0012] a first driving rod having a first end pivotally connected to the backrest driving rod;

[0013] a second driving rod having a first end pivotally connected to the connecting seat;

[0014] a third driving rod having a first end pivotally connected to the seat;

[0015] wherein a second end of the first driving rod, a second end of the second driving rod and a second end of the third driving rod are pivotally connected.

[0016] In some more preferred embodiments, the seat mechanism further comprises a first locking member, in a locked state, the first locking member connects at least two components of the backrest driving rod, the first driving rod, the second driving rod, the third driving rod and the connecting seat to lock the lifting linkage; in an unlocked state, the first locking member is detached from the at least two components to release the lifting linkage to allow the backrest and the seat to pivot relative to each other.

[0017] Further, the first locking member comprises a locking pin, the connecting seat is provided with a plurality of locking holes, the backrest driving rod is provided with a locking hole, and in the zero-gravity state, the locking hole on the backrest driving rod and one of the locking holes on the connecting seat are aligned and communicated and the locking pin is inserted.

[0018] In some more preferred embodiments, the seat mechanism further comprises a leg support pivotable relative to the seat and a leg support driving device for driving the leg support to pivot, an upper end of the leg support being pivotally connected to a front portion of the seat and defining a third plane for supporting shanks of an occupant; the leg support driving device comprises a fourth driving rod, a first end of the fourth driving rod being pivotally connected to the second driving rod or the third driving rod, and a second end of the fourth driving rod being pivotally connected to the leg support.

[0019] In some preferred embodiments, the seat mechanism further has a folding state, in the folding state, the backrest and the seat are close to each other; the second end of the fourth driving rod is pivotally and slidably connected to the leg support to allow the lower end of the leg support and the backrest to be close to each other in the folding state.

[0020] In some more preferable embodiments, a long slot is arranged on the leg support, a connecting pin is arranged on the second end of the fourth driving rod, and the connecting pin is inserted into the long slot and can rotate and move along the long slot.

[0021] In some more preferable embodiments, the seat mechanism further has a folded state in which the backrest and the seat are close to each other, and the backrest driving rod comprises:

[0022] an upper driving rod fixedly connected to the lower end of the backrest or integrated with the backrest, the upper driving rod being rotationally connected to the connecting seat;

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

[0024] The jacking linkage further comprises a second locking member, in the locked state, the second locking member connects the upper driving rod and the lower driving rod, and in the unlocked state, the second locking member is separated from the upper driving rod and / or the lower driving rod to allow the upper driving rod to be flipped relative to the lower driving rod, so as to fold or unfold the seat mechanism.

[0025] In some more preferable embodiments, the second locking member comprises a limiting pin, and limiting holes are arranged on the upper driving rod and the lower driving rod, respectively, when the seat mechanism is in the zero-gravity state, the limiting holes on the upper driving rod and the lower driving rod are aligned and communicated with each other, and the limiting pin is inserted into the two limiting holes to lock the upper driving rod and the lower driving rod as a whole; in the unlocked state, the limiting pin is separated from the limiting holes.

[0026] The utility model further adopts the following technical solutions:

[0027] A carrier comprising the seat mechanism.

[0028] In some preferable embodiments, the first included angle is 18-40 degrees, and the second included angle is 35-55 degrees.

[0029] More preferably, the first included angle is 25-35 degrees, and the second included angle is 40-50 degrees.

[0030] In some preferable embodiments, the carrier comprises a stroller, the stroller comprises a frame and wheels arranged at the bottom of the frame, and the connecting seat of the seat mechanism is removably or fixedly connected to the frame.

[0031] In some more preferred embodiments, the carrier comprises a car safety seat, and the connecting seat of the seat mechanism is removably or fixedly connected to the base of the car safety seat.

[0032] The above scheme has the following advantages:

[0033] The seat mechanism has a zero-gravity state, the backrest and the seat are linked through the jacking link set, the seat is automatically turned to the required angle by operating the backrest, the seat can be converted to the zero-gravity state by operating the backrest, the height of the heart and the knee of the passenger is basically consistent in the zero-gravity state, the passenger has the best comfort in this posture, and the state conversion operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0035] Figure 1 It is a side view of a seat mechanism according to an embodiment of the utility model in a sitting posture.

[0036] Figure 2 It is a side view of a seat mechanism according to an embodiment of the utility model in a zero-gravity state.

[0037] Figure 3 It is a side view of a seat mechanism according to an embodiment of the utility model in a lying posture.

[0038] Figure 4 It is a perspective view of a seat mechanism according to an embodiment of the utility model in a sitting posture.

[0039] Figure 5 It is a perspective view of a seat mechanism according to an embodiment of the utility model in a zero-gravity state.

[0040] Figure 6 It is a perspective view of a seat mechanism according to an embodiment of the utility model in a lying posture.

[0041] Figure 7 It is a schematic view of a backrest and an upper driving rod of a seat mechanism according to an embodiment of the utility model.

[0042] Figure 8 It is a schematic view of a connecting seat and a lower driving rod of a seat mechanism according to an embodiment of the utility model.

[0043] Figure 9 A side view of a seat mechanism in a folding process according to an embodiment of the present utility model.

[0044] Figure 10 A side view of a seat mechanism in a folding process according to an embodiment of the present utility model.

[0045] Figure 11 A perspective view of a carrier according to an embodiment of the present utility model.

[0046] Figure 12 A side view of a carrier according to an embodiment of the present utility model, wherein the seat mechanism is in a sitting position.

[0047] Figure 13 A side view of a carrier according to an embodiment of the present utility model, wherein the seat mechanism is in a zero-gravity state.

[0048] Figure 14 A side view of a carrier according to an embodiment of the present utility model, wherein the seat mechanism is in a lying position.

[0049] In the above drawings,

[0050] 100, seat mechanism; 200, stroller; 201, frame;

[0051] 1, seat; 2, backrest; 3, leg support; 3a, long slot; 4, jacking linkage group; 5, leg support driving device;

[0052] 11, connecting seat; 111, first lock hole; 112, second lock hole; 113, third lock hole; 12, seat rod; 13, backrest driving rod; 131, upper driving rod; 132, lower driving rod; 132a, fourth lock hole; 133, limiting hole; 14, first driving rod; 15, second driving rod; 16, third driving rod; 17, first locking piece; 18, second locking piece; 19, fourth driving rod; 19a, connecting pin. DETAILED DESCRIPTION

[0053] The preferred embodiments of the present utility model will be described in detail below with reference to the drawings, so that the advantages and features of the present utility model 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 utility model, but does not constitute a limitation on the present utility model. In addition, the technical features involved in each embodiment of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0054] In this document, the terms "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings of the seat mechanism in the sitting state, 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0055] Figures 1 to 14 The drawings are drawn in true proportion, and in order to maintain the brevity of the specification, the proportions and positions of the elements are not listed one by one, but the proportions and positions of the elements should be regarded as part of the content of the specification.

[0056] The present embodiment provides a seat mechanism and a vehicle for carrying children, which can be a stroller, an automobile safety seat, etc.

[0057] Referring to Figures 1 to 10 , the seat mechanism 100 mainly includes a seat 1 and a backrest 2, the seat 1 defines a first plane P1 for supporting the thighs of an occupant, and the backrest 2 defines a second plane P2 for supporting the back of the occupant, as shown in Figure 2 . The seat 1 and the backrest 2 can rotate relative to each other, so that the seat mechanism 100 has a plurality of use states, including a sitting state (as shown in Figure 1 ), a lying state (as shown in Figure 3 ), and a zero-gravity state (as shown in Figure 2 ) between the sitting state and the lying state. In each use state, the included angle between the seat 1 and the backrest 2 (i.e. the included angle of the first plane P1 and the second plane P2) is different for the occupant to use in different postures; in particular, the included angle of the first plane P1 and the second plane P2 in the zero-gravity state is greater than the included angle of the first plane P1 and the second plane P2 in the sitting state and less than the included angle of the first plane P1 and the second plane P2 in the lying state. As shown in Figure 2 , in the zero-gravity state, the front of the seat 1 is higher than the back, the first plane P1 has a first included angle a1 greater than zero with respect to the horizontal plane, and the second plane P2 has a second included angle a2 greater than zero with respect to the horizontal plane, so that the heart (H1 position) and the knees (H2 position) of the occupant are at the same height, and the occupant has the best comfort in this state. The first included angle a1 and the second included angle a2 are both less than 90 degrees. The first included angle a1 is 18-40 degrees, preferably 25-35 degrees. The second included angle a2 is 35-55 degrees, preferably 40-50 degrees.

[0058] As shown in Figure 1As shown, in the seated position, the angle between the first plane P1 and the horizontal plane is less than the first angle α1, and the angle between the second plane P2 and the horizontal plane is greater than the second angle α2. That is, in the seated position, the seat 1 is generally horizontal, or tilted at a small angle (less than the first angle α1, which can be between 0 and 10 degrees) so that the front of the seat 1 is slightly higher than the back; the backrest 2 forms a larger angle with the horizontal plane (greater than the second angle α2, which can be between 90 and 80 degrees). Figure 3 As shown, in the lying position, the angle between the first plane P1 and the horizontal plane is greater than the first angle α1, and the angle between the second plane P2 and the horizontal plane is less than the second angle α2. That is, in the lying position, the seat 1 is generally horizontal, or tilted at a small angle (less than the first angle α1, which can be between 0 and 10 degrees) so that the front of the seat 1 is slightly higher than the back; the backrest 2 forms a small angle with the horizontal plane (less than the second angle α2, which can be between 0 and 20 degrees).

[0059] Furthermore, the seating mechanism 100 includes a leg support 3, which is rotatable relative to the seat 1, thus having different tilt angles in different usage states. The leg support 3 is located at the front of the seat 1 and defines a third plane P3 for supporting the occupant's lower legs. In a zero-gravity state, the lower end of the leg support 3 is located in front of its upper end, and the third plane P3 has a third included angle α3 greater than zero relative to the horizontal plane, which is less than 90 degrees. The third included angle α3 is 26~40 degrees, preferably 28~35 degrees. Figure 2 In the specific example shown, the first included angle α1 is 30 degrees, the second included angle α2 is 45 degrees, and the third included angle α3 is 31 degrees; the included angle between the seat 1 on the first plane P1 and the backrest 2 on the second plane P2 is approximately 105 degrees.

[0060] In the Figure 1 The sitting posture shown will be converted to the following sequence: Figure 2 The zero gravity state shown and Figure 3 In the lying position shown, the first included angle α1 first increases and then decreases, the second included angle α2 decreases successively, the third included angle α3 decreases successively, and the included angle between the seat 1 on the first plane P1 and the backrest 2 on the second plane P2 increases successively.

[0061] Furthermore, the seating mechanism 100 also has a folded state, in which the backrest 2 and seat 1 are close together. When unfolded, the seating mechanism 100 can be used in any configuration, such as... Figure 1 The sitting posture shown Figure 2 The zero-gravity state shown Figure 3 The lying position shown.

[0062] The seat mechanism further comprises a lifting linkage 4 rotatably connected between the lower end of the backrest 2 and the rear of the seat 1 to link the two and cause the seat 1 to rotate when the backrest 2 rotates. After the backrest 2 rotates downward, the lifting linkage 4 lifts the seat 1 upward to turn the seat 1 to a desired angle. In the embodiment, the upper end of the leg support 3 is rotatably connected to the front end of the seat 1, and a leg support driving device 5 is connected between the lower end of the backrest 2 or the seat 1 and the leg support 3 to cause the leg support 3 to rotate when the backrest 2 or the seat 1 rotates. The structure and driving principle of the lifting linkage 4 and the leg support driving device 5 of the embodiment are described in detail below.

[0063] The seat mechanism 100 comprises a connecting base 11 that fixes the seat mechanism 100 to a support portion of a carrier (e.g. a frame of a stroller, a base of a car safety seat, etc.) or has an interface connected to the support portion of the carrier. The rear of the seat 1 is rotatably connected to the connecting base 11; in the embodiment, the seat 1 comprises two seat rods 12 extending front to back, and specifically the rear end of the seat rods 12 is pivoted to the connecting base 11. The lifting linkage 4 comprises a backrest driving rod 13, a first driving rod 14, a second driving rod 15, and a third driving rod 16. The backrest 2 is rotatably connected to the connecting base 11 by the backrest driving rod 13, and the upper part of the backrest driving rod 13 is fixedly connected or integrated with the backrest 2. 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 base 11, and the first end of the third driving rod 16 is rotatably connected to the seat rods 12 of the seat 1. 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 the embodiment, the 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 by a pivot. Among them, the seat rods 12, the backrest driving rod 13, the first driving rod 14, and the third driving rod 16 form a four-bar linkage mechanism, which deforms when the backrest 2 is pressed and the backrest driving rod 13 is turned, and is limited by the second driving rod 15 connected to the connecting base 11, so that the seat 1 can be turned to a set angle range with the backrest 2, thereby changing the angle and realizing the posture conversion.

[0064] The seat mechanism 100 further comprises 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 components of the connecting base 11, the backrest driving rod 13, the first driving rod 14, the second driving rod 15, the third driving rod 16 and the connecting base 11 to lock the lifting linkage 4, thereby stabilizing the seat mechanism 100 in the sitting state, the zero-gravity state or the lying state. In the unlocked state, the first locking member 17 is disengaged from the at least two components to release the lifting linkage 4, thereby allowing the relative rotation of the backrest 2 and the seat 1.

[0065] Further, as shown in Figs. 1-3, the seat mechanism 100 further comprises a backrest driving rod 13. The backrest driving rod 13 is connected to the backrest 2 and the connecting base 11. Figure 7 and Figure 8 Specifically, in the embodiment, the backrest driving rod 13 comprises an upper driving rod 131 and a lower driving rod 132. The upper driving rod 131 is fixedly connected to the lower end of the backrest 2 or is integral with the backrest 2, and the upper driving rod 131 is rotatably connected to the connecting base 11. The first end of the lower driving rod 132 is rotatably connected to the connecting base 11 or the first end of the upper driving rod 131, and the second end of the lower driving rod 132 is rotatably connected to the first end of the first driving rod 14. In the embodiment, the same pivot is used to rotatably connect the one end of the upper driving rod 131 and the first end of the lower driving rod 132 to the connecting base 11. The lifting linkage 4 further comprises 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 driving rod 131 and the lower driving rod 132. In the unlocked state, the second locking member 18 is disengaged from the upper driving rod 131 and / or the lower driving rod 132 to allow the upper driving rod 131 to be flipped relative to the lower driving rod 132, thereby folding or unfolding the seat mechanism 100. It should be noted that the second locking member 18 in the locked state is offset from the rotation connection point of the upper driving rod 131 and the lower driving rod 132.

[0066] Specifically, in the 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 base 11 to lock the backrest driving rod 13 and the connecting base 11, and the backrest driving rod 13 cannot be flipped relative to the connecting base 11, thereby stabilizing the seat mechanism 100 in the sitting state, the zero-gravity state or the lying state. In the unlocked state, the first locking member 17 is disengaged from the lower driving rod 132 and / or the connecting base 11, and the two can be rotated relative to each other, and the seat driving mechanism is released, thereby allowing the four-bar linkage mechanism to deform, and the seat 1 and the backrest 2 can be rotated relative to each other. In the specific example shown in Fig. 1, the first locking member 17 is a locking pin. Figures 1 to 10 Figure 8 In the specific example shown in Fig. 1, the first locking member 17 comprises a locking pin. Referring to Fig. 1, the connecting base 11 is provided with a first lock hole 111, a second lock hole 112 and a third lock hole 113. The first lock hole 111, the second lock hole 112 and the third lock hole 113 are along the circular arc-shaped path of the rotation of the lower driving rod 132 relative to the connecting base 11. Figure 8 ​The fourth locking hole 132a is arranged on the lower driving rod 132 in sequence with the first locking hole 111 and the second locking hole 112. The first locking member 17 is inserted into the fourth locking hole 132a and the first locking hole 111 to lock the upper driving rod 131 relative to the connecting base 11 when the seat mechanism 100 is in the sitting position, as shown in FIG. 2. 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 base 11 when the seat mechanism 100 is in the zero-gravity position, as shown in FIG. 3. 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 base 11 when the seat mechanism 100 is in the lying position, as shown in FIG. 4. Figure 4 Figure 5 Figure 6

[0067] Figure 7 Figure 8 The second locking member 18 includes a limiting pin. The upper driving rod 131 and the lower driving rod 132 are respectively provided with limiting holes 133. When the limiting holes 133 on the upper driving rod 131 and the lower driving rod 132 are aligned and communicated with each other, the second locking member 18 is inserted into the two limiting holes 133, and the upper driving rod 131 and the lower driving rod 132 are locked as a whole and cannot rotate relative to each other. At this time, the seat mechanism 100 can be in any use state. Preferably, when the second locking member 18 locks the upper driving rod 131 and the lower driving rod 132 relative to each other, the center line of the upper driving rod 131 and the center line of the lower driving rod 132 are collinear or parallel. When it is necessary to fold the seat mechanism 100, the second locking member 18 is pulled out of the limiting holes 133 of the upper driving rod 131 and / or the lower driving rod 132, and the upper driving rod 131 and the lower driving rod 132 are unlocked and can rotate relative to each other.

[0068] The upper end of the leg support 3 is rotationally connected to the front end of the seat rod 12. The leg support driving device 5 includes a fourth driving rod 19, the first end of the fourth driving rod 19 is rotationally connected to the second driving rod 15 or the third driving rod 16, and the second end of the fourth driving rod 19 is rotationally connected to the leg support 3. As shown in FIG. 5, the first end of the fourth driving rod 19 is rotationally connected between the first end and the second end of the third driving rod 16 through a pivot. When the four-bar linkage mechanism of the lifting linkage group 4 is deformed, the fourth driving rod 19 is flipped to push the leg support 3 to flip upward relative to the seat rod 12. Figures 4 to 6

[0069] ​​​​​​Further, the second end of the fourth driving rod 19 is also slidable relative to the leg support 3 to allow the seat mechanism 100 to fold the lower end of the leg support 3 and the backrest 2 towards each other, as shown in Figure 9 and Figure 10 Specifically, the leg support 3 is provided with a long slot 3a extending along the center line of the leg support 3. The second end of the fourth driving rod 19 is provided with a connecting pin 19a which is inserted into the long slot 3a and configured to be rotatable and slidable in the long slot 3a. During the conversion of the seat mechanism 100 from the sitting state to the folded state, the connecting pin 19a is first slid from the lower end of the long slot 3a to the upper end, as shown in Figure 9 Then, the leg support 3 is flipped upwards to further close the backrest 2 and reduce the thickness of the seat mechanism 100 in the folded state. During this process, the connecting pin 19a is slid from the upper end of the long slot 3a to the lower end, and at this time the upper end of the long slot 3a can be substantially level with the lower end.

[0070] The embodiment also provides a carrier 200, which can be a child stroller as shown in Figures 11 to 14 Referring to Figures 11 to 14 The child stroller includes a frame 201 and wheels arranged at the bottom of the frame 201. The frame 201 has an interface to which the connecting seat 11 of the seat mechanism 100 is removably or fixedly connected. The frame 201 has an unfolded state and a folded state, and the seat mechanism 100 can be unfolded and folded on the frame 201 and has three use states of sitting, zero-gravity and lying after unfolding, as shown in Figure 12 , Figure 13 and Figure 14 .

[0071] The seat mechanism 100 converts to the zero-gravity state as follows:

[0072] When the seat mechanism 100 is in the sitting state, the second locking member 18 is kept in its locked state, and the first locking member 17 is pulled out of 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 lifting linkage 4. The backrest 2 is pressed downwards, the four-bar linkage mechanism of the lifting linkage 4 is deformed, the seat rod 12 is flipped, the front part of the seat rod 12 is lifted upwards, and the fourth driving rod 19 pushes the leg support 3 to flip upwards. 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 to lock the seat mechanism 100 in the zero-gravity state, and the conversion from the sitting state to the zero-gravity state is realized.

[0073] The conversion process from the sitting state or the zero-gravity state to the lying state is similar to the foregoing process, except that after the fourth lock hole 132a and the third lock hole 113 on the connecting seat 11 are aligned, the first locking member 17 is inserted into the fourth lock hole 132a and the third lock hole 113.

[0074] When the seat mechanism 100 is in the lying state, the second locking member 18 is kept in its locking state, and the first locking member 17 is pulled out of the second lock hole 112 of the lower driving rod 132 and / or the third lock hole 113 of the connecting seat 11 to unlock the lifting linkage set 4; the backrest 2 is pushed upward, the four-bar linkage mechanism of the lifting linkage set 4 is deformed, the seat rod 12 is turned over, the front part of the seat rod 12 is turned over downward, and the fourth driving rod 19 pulls the leg support 3 to turn over downward; until the fourth lock hole 132a on the lower driving rod 132 moves to be aligned with the second lock hole 112 of the connecting seat 11, the first locking member 17 is inserted into the fourth lock hole 132a and the second lock hole 112 to lock the seat mechanism 100 in the zero-gravity state, and the conversion from the lying state to the zero-gravity state is realized.

[0075] The conversion process from the lying state or the zero-gravity state to the sitting state is similar to the foregoing process, except that after the fourth lock hole 132a and the first lock hole 111 on the connecting seat 11 are aligned, the first locking member 17 is inserted into the fourth lock hole 132a and the first lock hole 111.

[0076] The folding process of the seat mechanism 100 is as follows:

[0077] The seat mechanism 100 is kept in the sitting state, the second locking member 18 is pulled out of the limiting hole 133 of the upper driving rod 131 and / or the lower driving rod 132 to unlock the backrest driving rod 13, the backrest 2 is pushed forward to be close to the seat 1, until Figure 9 as shown in the state. The leg support 3 is turned over upward, the lower end of the leg support 3 is close to the backrest 2, and finally the conversion is made to Figure 10 as shown in the folding state.

[0078] The seat mechanism 100 has the following advantages: the seat mechanism 100 has a zero-gravity state, in which the height of the heart and the knees of the occupant is basically the same, the occupant has the best comfort in this state, and the use is convenient, and the children in the seat mechanism 100 have multiple postures; the backrest 2 is operated to realize the conversion of the seat mechanism 100 between the sitting state, the zero-gravity state, and the lying state, and the conversion operation is convenient; in different use states, the angle of the leg support 3 is also automatically changed, the corresponding support is provided for the lower leg part, the comfort of the occupant is further improved, and the use is convenient.

[0079] It can be understood that the same or similar parts in the above embodiments can be mutually referred to, and the content not described in detail in some embodiments can refer to the same or similar content in other embodiments.

[0080] Unless specifically defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. If there is a conflict between the definitions used in this document and those contained in other documents, the definitions used in this document shall prevail.

[0081] It should also be noted that the "rotary connection" in the above embodiments refers to a pivot connection, unless the context clearly indicates other rotary connection methods.

[0082] As shown in the specification and claims, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0083] It can be further understood that "multiple" in the present disclosure means two or more, and other quantifiers are similar. The association relationship between the associated objects is described by "and / or", which means that there can be three relationships, for example, A and / or B can represent three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. The singular form of "one", "said" and "the" is also intended to include the plural form, unless the context clearly indicates otherwise.

[0084] It can be further understood that the terms "first", "second", etc. are used to describe various information, but these 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 represent a specific order or importance. In fact, the expressions of "first", "second", etc. can be used interchangeably. For example, 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 without departing from the scope of the present disclosure.

[0085] The above embodiments are only to illustrate the technical concept and characteristics of the present application, and are a preferred embodiment, the purpose of which is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application.

Claims

1. A seat mechanism, characterized by, The seat mechanism comprises a connecting base, a seat and a backrest capable of rotating relative to the seat, the seat and the backrest are respectively rotatably connected to the connecting base, the seat defines a first plane for supporting thighs of a passenger, and the backrest defines a second plane for supporting a back of the passenger; The seat mechanism further comprises a lifting linkage rotatably connected between the backrest and the seat to lift the seat upward when the backrest rotates to convert the seat mechanism to a zero-gravity state, in the zero-gravity state, a front portion of the seat is higher than a rear portion of the seat, the first plane has a first included angle greater than zero with respect to a horizontal plane, and the second plane has a second included angle greater than zero with respect to the horizontal plane, so that a heart and knees of the passenger are at the same height.

2. The seating mechanism of claim 1, wherein, The lifting linkage comprises: a backrest driving rod, the backrest is rotatably connected to the connecting base through the backrest driving rod; a first driving rod having a first end rotatably connected to the backrest driving rod; a second driving rod having a first end rotatably connected to the connecting base; a third driving rod having a first end rotatably connected to the seat; wherein a second end of the first driving rod, a second end of the second driving rod and a second end of the third driving rod are rotatably connected.

3. The seating mechanism of claim 2, wherein, The seat mechanism further comprises a first locking member, in a locked state, the first locking member connects at least two components of the backrest driving rod, the first driving rod, the second driving rod, the third driving rod and the connecting base to lock the lifting linkage, and in an unlocked state, the first locking member is separated from the at least two components to release the lifting linkage to allow the backrest and the seat to rotate relative to each other.

4. The seating mechanism of claim 3, wherein, The first locking member comprises a locking pin, the connecting base is provided with a plurality of locking holes, the backrest driving rod is provided with a locking hole, and in the zero-gravity state, the locking hole of the backrest driving rod and one of the locking holes of the connecting base are aligned and communicated to insert the locking pin.

5. The seating mechanism of claim 2, wherein, 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, an upper end of the leg support is rotatably connected to a front portion of the seat and defines a third plane for supporting shanks of the passenger, and the leg support driving device comprises 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.

6. The seating mechanism of claim 5, wherein, The seat mechanism further has a folded state, in the folded state, the backrest and the seat are close to each other, and the second end of the fourth driving rod is rotatably and slidably connected to the leg support to allow a lower end of the leg support and the backrest to be close to each other in the folded state.

7. The seating mechanism of claim 6, wherein, The leg support is provided with a long slot, the second end of the fourth driving rod is provided with a connecting pin, the connecting pin is inserted into the long slot and is capable of rotating in the long slot and moving along the long slot.

8. The seating mechanism of claim 2, wherein, The seat mechanism further has a folded state in which the backrest and the seat are folded towards each other, and the backrest driving rod comprises: an upper driving rod fixedly connected to a lower end of the backrest or integrated with the backrest, the upper driving rod being rotationally connected to the connecting seat; a lower driving rod having a first end rotationally connected to the connecting seat and / or the upper driving rod and a second end rotationally connected to a first end of the first driving rod; the jacking linkage further comprises a second locking member, in a locked state the second locking member connects the upper driving rod and the lower driving rod, in an unlocked state the second locking member is disengaged from the upper driving rod and / or the lower driving rod to allow the upper driving rod to be flipped relative to the lower driving rod, thereby folding or unfolding the seat mechanism.

9. The seating mechanism of claim 8, wherein, the second locking member comprises a limiting pin, the upper driving rod and the lower driving rod are respectively provided with limiting holes, when the seat mechanism is in the zero-gravity state, the limiting holes on the upper driving rod and the lower driving rod are aligned and communicated with each other, the limiting pin is inserted into the two limiting holes to lock the upper driving rod and the lower driving rod as a whole; in the unlocked state, the limiting pin is disengaged from the limiting holes.

10. A carrier, characterized by The seat mechanism comprises the seat mechanism according to any one of claims 1 to 9, the first included angle is 18-40 degrees, and the second included angle is 35-55 degrees.

Images