Seat mechanism and carrier

Abstract

The utility model discloses a seat mechanism and a carrier, the seat mechanism comprises a seat, a backrest, an armrest and a base which are mutually and rotatably connected, and also comprises a first locking mechanism which is arranged between the armrest and the seat and is used for locking the relative positions of the armrest and the seat, and a second locking mechanism which is arranged between the seat and the base and is used for locking the relative positions of the seat and the base, a first unlocking part and a second unlocking part are arranged on the backrest; when the seat mechanism folds the backrest to rotate and get close to the seat, the first unlocking part can be matched with the first locking mechanism, and the second unlocking part can be matched with the second locking mechanism, so that the first locking mechanism and the second locking mechanism are unlocked respectively. When the seat mechanism is folded, the first locking mechanism and the second locking mechanism do not need to be unlocked through independent operation, unlocking of the first locking mechanism and the second locking mechanism can be achieved through rotation linkage of the backrest, unlocking operation of the first locking mechanism and the second locking mechanism is quite convenient, and folding operation of the seat mechanism is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to children's products technical field, concretely relates to a seat mechanism and carrier. BACKGROUND

[0002] The child stroller generally includes a stroller frame and a seat mechanism arranged on the stroller frame. The seat mechanism generally includes a seat, a backrest, a handrail and a base, and the seat, the backrest, the handrail and the base are rotatably connected with each other, and the base is connected with the stroller frame. When the child stroller is folded, the seat mechanism can also be folded, and when folded, the backrest and the handrail can be rotated to be close to the seat, and the seat can be rotated relative to the base to be close to the stroller frame. When the child stroller is unfolded, the relative positions between the seat, the backrest, the handrail and the base need to be locked by multiple locking mechanisms respectively. In the prior art, when the seat mechanism is folded, each locking mechanism needs to be unlocked separately before the seat mechanism can be folded, which makes the folding operation of the seat mechanism inconvenient. SUMMARY

[0003] The utility model aims at the deficiency in the prior art, and provides a seat mechanism which is convenient to unlock.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0005] A seat mechanism has an unfolded state and a folded state, and includes a seat, a backrest, a handrail and a base. The seat, the backrest, the handrail and the base are rotatably connected with each other. The seat mechanism further includes a first locking mechanism arranged between the handrail and the seat to lock the relative position of the two, and a second locking mechanism arranged between the seat and the base to lock the relative position of the two. The backrest is provided with a first unlocking part and a second unlocking part. When the seat mechanism is folded and the backrest is rotated to be close to the seat, the first unlocking part can cooperate with the first locking mechanism, and the second unlocking part can cooperate with the second locking mechanism, so that the first locking mechanism and the second locking mechanism are unlocked respectively.

[0006] In some embodiments, when the seat mechanism is folded and the backrest is rotated from an initial position by a first stroke, the first locking mechanism is unlocked. When the seat mechanism is folded and the backrest is rotated from the initial position by a second stroke, the second unlocking part cooperates with the second locking mechanism, and the second stroke is not less than the first stroke.

[0007] In some embodiments, when the seat mechanism is in the unfolded state, the first unlocking portion cooperates with the first locking mechanism, and the second unlocking portion is disengaged from the second locking mechanism; when the backrest is rotated relative to the seat to the folded state, the second locking mechanism is unlocked;

[0008] In some embodiments, the seat, the backrest, the armrest and the base are rotatably connected to each other by a rotary joint, one of the first locking mechanism and the second locking mechanism is arranged outside the rotary joint, and the other is arranged inside the rotary joint.

[0009] In some embodiments, the first locking mechanism is arranged outside the rotary joint, the rotary joint comprises a first joint seat fixedly arranged on the backrest, and the first unlocking portion is arranged outside the first joint seat.

[0010] The first joint seat is provided with a first protrusion protruding outward from the outer profile thereof, and the first unlocking portion is arranged on the first protrusion.

[0011] In some embodiments, the first locking mechanism comprises a first locking piece movably arranged on one of the seat and the armrest, and a first locking slot arranged on the other and adapted to the first locking piece; when the first locking mechanism is in the locked state, the first locking piece is inserted into the first locking slot; when the first locking mechanism is in the unlocked state, the first locking piece is disengaged from the first locking slot, and the first unlocking portion cooperates with the first locking piece.

[0012] The first locking mechanism further comprises a first elastic piece, one end of the first elastic piece is arranged on the component of the seat and the armrest on which the first locking piece is arranged, and the other end of the first elastic piece is arranged on the first locking piece.

[0013] In some embodiments, the first unlocking portion is a first inclined surface arranged on the first protrusion, and the first locking piece is provided with a second inclined surface adapted to the first inclined surface; when the seat mechanism is converted from the unfolded state to the folded state, the first inclined surface can be arranged in cooperation with the second inclined surface; when the seat mechanism is in the folded state, the first inclined surface is away from the second inclined surface.

[0014] In some embodiments, the first protrusion is further provided with a third inclined surface, and the first locking piece is further provided with a fourth inclined surface adapted to the third inclined surface; when the seat mechanism is converted from the folded state to the unfolded state, the third inclined surface can be arranged in cooperation with the fourth inclined surface; when the seat mechanism is in the unfolded state, the third inclined surface is away from the fourth inclined surface.

[0015] And / or, the rotary joint further comprises a second joint base fixedly arranged at the rear of the seat, the second joint base extending upward from the rear of the seat, the first locking member being slidably arranged at the rear of the seat in the left-right direction;

[0016] The rotary joint further comprises a third joint base fixedly arranged on the armrest, the third joint base being provided with a second protrusion protruding outward from the outer profile thereof, the first locking groove being arranged on the second protrusion.

[0017] In some embodiments, the second locking mechanism is arranged inside the rotary joint, the rotary joint further comprising a first joint base fixedly arranged on the backrest, the second unlocking portion being arranged inside the first joint base.

[0018] In some embodiments, the second locking mechanism comprises a second locking member movably arranged on one of the seat and the base and a second locking groove arranged on the other of the seat and the base and adapted to the second locking member; when the second locking mechanism is in the locked state, the second locking member is inserted into the second locking groove; when the second locking mechanism is in the unlocked state, the second locking member is disengaged from the second locking groove, the second unlocking portion cooperating with the second locking member.

[0019] The second locking mechanism further comprises a second elastic member, one end of the second elastic member being arranged on the component of the seat and the base on which the second locking member is arranged, the other end of the second elastic member being arranged on the second locking member.

[0020] In some embodiments, the rotary joint further comprises a second joint base fixedly arranged at the rear of the seat, the base being rotatably arranged outside the second joint base to form an outer cover of the rotary joint, the second locking member being slidably arranged on the base in the front-rear direction, the second locking groove being arranged on the second joint base.

[0021] The second locking member is provided with a receiving groove, a cooperating portion cooperating with the second unlocking portion being arranged on the sidewall of the receiving groove, the second unlocking portion being rotatably arranged in the receiving groove; when the seat mechanism is in the unfolded state, the second unlocking portion is away from the cooperating portion; when the seat mechanism folds the backrest to rotate a second stroke from the initial position, the second unlocking portion cooperates with the cooperating portion.

[0022] The utility model further provides a carrier, the carrier includes a chassis and a seat mechanism as any one of the above on the chassis, wherein, the base is connected with the chassis.

[0023] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: In the seat mechanism of this utility model, when the seat mechanism is folded, the first locking mechanism and the second locking mechanism can be unlocked by rotating the backrest. In this way, there is no need to operate the first locking mechanism and the second locking mechanism separately to unlock them. The unlocking of the first locking mechanism and the second locking mechanism can be achieved by rotating the backrest together, which makes the unlocking operation of the first locking mechanism and the second locking mechanism very convenient and facilitates the folding operation of the seat mechanism. Attached Figure Description

[0024] Appendix Figure 1 This is a side view of the stroller in the unfolded state according to this embodiment;

[0025] Appendix Figure 2 This is a side view of the stroller in this embodiment during the folding process;

[0026] Appendix Figure 3 This is a front view of the stroller in the folded state according to this embodiment;

[0027] Appendix Figure 4 For the appendix Figure 3 sectional view along line AA;

[0028] Appendix Figure 5 This is a three-dimensional schematic diagram of the seating mechanism in the unfolded state according to this embodiment;

[0029] Appendix Figure 6 This is one of the cross-sectional schematic diagrams of the seating mechanism in the unfolded state according to this embodiment;

[0030] Appendix Figure 7 This is a second cross-sectional view of the seating mechanism in the unfolded state according to this embodiment;

[0031] Appendix Figure 8 For the appendix Figure 7 Enlarged view of a portion of point A in the middle;

[0032] Appendix Figure 9 This is the third cross-sectional view of the seating mechanism in the unfolded state according to this embodiment;

[0033] Appendix Figure 10 For the appendix Figure 9 Enlarged view of a portion of point A in the middle;

[0034] Appendix Figure 11 This is a side view of the seat mechanism in this embodiment during the folding process (the backrest rotates forward for the first stroke to unlock the first locking mechanism);

[0035] Appendix Figure 12Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0036] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 13 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 12 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0037] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 14 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0038] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 15 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 14 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0039] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 16 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0040] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 17 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 16 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0041] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 18 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0042] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 19 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0043] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 20 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 19 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0044] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 21 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0045] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 22 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 21 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0046] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 23 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0047] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 24 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0048] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 25 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 24 Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism);

[0049] Fig. 6 is a sectional view of the seat mechanism in the folding process (the backrest is rotated forward in the first stroke to unlock the first locking mechanism); Figure 26Figure 1 is a schematic view of the utility model in a first position; Figure 24 Figure 2 is a schematic view of the utility model in a second position;

[0050] Figure 3 is a schematic view of the utility model in a third position; Figure 27 Figure 4 is a schematic view of the utility model in a fourth position;

[0051] Figure 5 is a schematic view of the utility model in a fifth position; Figure 28 Figure 6 is a schematic view of the utility model in a sixth position; Figure 27 Figure 7 is a schematic view of the utility model in a seventh position;

[0052] Figure 8 is a schematic view of the utility model in an eighth position; Figure 29 Figure 9 is a schematic view of the utility model in a ninth position;

[0053] Figure 10 is a schematic view of the utility model in a tenth position; Figure 30 Figure 11 is a schematic view of the utility model in an eleventh position; Figure 29 Figure 12 is a schematic view of the utility model in a twelfth position;

[0054] Figure 13 is a schematic view of the utility model in a thirteenth position; Figure 31 Figure 14 is a schematic view of the utility model in a fourteenth position;

[0055] Figure 15 is a schematic view of the utility model in a fifteenth position; Figure 32 Figure 16 is a schematic view of the utility model in a sixteenth position.

[0056] 1, seat; 11, second joint seat; 111, second locking groove; 112, second sliding groove; 2, backrest; 21, first joint seat; 211, first protrusion; 211a, first inclined surface; 211b, third inclined surface; 212, column portion; 212a, second unlocking portion; 3, armrest; 31, third joint seat; 311, second protrusion; 311a, first locking groove; 4, base; 41, first sliding groove; 5, first locking member; 51, first locking portion; 52, second inclined surface; 53, fourth inclined surface; 6, first elastic member; 7, second locking member; 71, second locking portion; 72, accommodating groove; 721, matching portion; 8, footrest; 9, stroller frame. DETAILED DESCRIPTION

[0057] The technical scheme of the utility model will be further described below in combination with the drawings and specific embodiments.

[0058] In the following description, the directions such as "front", "rear", "left", "right", "up", "down" and the like are all according to the directions in the drawings. Figure 1 In the drawings, the left direction is "front", the right direction is "rear", the up direction is "up" and the down direction is "down". The directions perpendicular to the paper surface in the drawings are "left" and "right". The definition of the above directions is merely for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0059] The utility model discloses a carrier includes the chassis and sets up the seat mechanism on the chassis. Figures 1-4 As shown in the drawings, the carrier is a child stroller, that is, the chassis is a stroller frame 9. In other embodiments, the carrier can also be a trailer, a dining chair, etc., and the type of chassis also changes accordingly with the structure of the carrier.

[0060] As shown in the drawings, Figures 5-7 and Figure 9 The seat mechanism of the utility model includes a seat 1, a backrest 2, an armrest 3 and a base 4, and the seat 1, the backrest 2, the armrest 3 and the base 4 are rotatably connected to each other through rotating joints. Among them, the base 4 is fixedly connected, rotatably connected or detachably connected with the stroller frame 9, or the base 4 is part of the stroller frame, the seat 1 is rotatably connected with the base 4, and the backrest 1 and the armrest 3 are rotatably connected with the seat 1 respectively. Among them, the backrest 1 and the armrest 3 can be connected with the seat 1 around the same rotating shaft or different rotating shafts.

[0061] In this embodiment, the rotating joint includes a first joint seat 21, a second joint seat 11 and a third joint seat 31. As shown in the drawings, Figure 23 , Figure 24 , Figure 27 and Figure 29 The first joint seat 21 is fixedly arranged at the end of the backrest 2, the second joint seat 11 is fixedly arranged at the rear of the seat 1, and the third joint seat 31 is fixedly arranged at the end of the armrest 3. The first joint seat 21 and the third joint seat 31 are rotatably connected with the second joint seat 11 respectively, and the base 4 is rotatably arranged outside the second joint seat 11 to form an outer cover of the rotating joint. The axis lines of the rotating connections of the first joint seat 21 with the second joint seat 11, the third joint seat 31 with the second joint seat 11 and the base 4 with the second joint seat 11 extend along the same straight line direction.

[0062] The child stroller has an unfolded state and a folded state. When the child stroller is in the unfolded state and the seat mechanism is also in the unfolded state, the backrest 2 and the armrest 3 are both rotated backward away from the seat 1, as shown in the drawings, Figure 1 , Figures 5-7 and Figure 9 When the child stroller is in the folded state and the seat mechanism is also in the folded state, the backrest 2 and the armrest 3 are both rotated forward to approach the seat 1, and the seat 1 drives the backrest 2 and the armrest 3 to rotate relative to the base 4 to approach the stroller frame, as shown in the drawings, Figure 3 and Figure 4 By rotating the first joint seat 21 and the third joint seat 31 relative to the second joint seat 11 respectively, the second joint seat 11 is rotated relative to the base 4, so that the seat mechanism can be converted between the unfolded state and the folded state.

[0063] The seat mechanism further comprises a first locking mechanism, a second locking mechanism and a third locking mechanism. The first locking mechanism is arranged between the seat 1 and the armrest 3 to lock the relative position of the two, the second locking mechanism is arranged between the seat 1 and the base 4 to lock the relative position of the two, and the third locking mechanism is arranged between the seat 1 and the backrest 2 to lock the relative position of the two. When the child stroller is in the unfolded state, the first locking mechanism, the second locking mechanism and the third locking mechanism are all in the locked state. After the first locking mechanism, the second locking mechanism and the third locking mechanism are unlocked, the backrest 2 can be rotated relative to the seat 1 to be close to the seat 1, the armrest 3 can be rotated relative to the seat 1 to be close to the seat 1 under the action of its own gravity, and the seat 1 can drive the backrest 2 and the armrest 3 to be rotated relative to the base 4 to be close to the stroller frame, so that the child stroller is folded from the unfolded state.

[0064] The first locking mechanism comprises a first locking piece 5 movably arranged on one of the seat 1 and the armrest 3 and a first locking slot 311a arranged on the other and matched with the first locking piece 5. When the first locking mechanism is in the locked state, the first locking piece 5 is partially inserted into the first locking slot 311a, thereby locking the relative position between the seat 1 and the armrest 3, so that the armrest 3 cannot be rotated relative to the seat 1, as shown in Figure 7 and Figure 8 When the first locking mechanism is in the unlocked state, the first locking piece 5 is completely out of the first locking slot 311a, and the armrest 3 can be rotated relative to the seat 1, as shown in Figure 12 and Figure 13 .

[0065] Specifically, as shown in Figure 31 , one end of the first locking piece 5 is provided with a first locking portion 51. When the first locking mechanism is in the locked state, the first locking portion 51 is inserted into the first locking slot 311a, as shown in Figure 7 and Figure 8 When the first locking mechanism is in the unlocked state, the first locking portion 51 is out of the first locking slot 311a, as shown in Figure 12 and Figure 13 .

[0066] In this embodiment, the second joint seat 11 extends upward from the rear of the seat 1, the first locking piece 5 is slidably arranged at the rear of the seat 1 and is arranged at the left and right sides of the seat 1 respectively, and the third joint seat 31 is provided with a second protruding portion 311 protruding outward from the outer contour surface thereof, and the first locking slot 311a is arranged on the second protruding portion 311. In this way, the first locking mechanism is located outside the rotating joint, as shown in Figures 6-8 , Figure 12 and Figure 13Thus, the width dimension of the rotating joint in the left-right direction can be reduced, and the width dimension of the seat mechanism in the left-right direction can be reduced accordingly. In addition, when the width dimension of the rotating joint is reduced, the seating space of the seat mechanism can be increased accordingly while the overall size of the seat mechanism remains unchanged.

[0067] The first locking mechanism further comprises a first elastic member 6, one end of the first elastic member 6 is arranged on the component in which the first locking member 5 is arranged in the seat 1 and the armrest 3, in this embodiment, one end of the first elastic member 6 is arranged on the seat 1, and the other end of the first elastic member 6 is arranged on the first locking member 5. The elastic force of the first elastic member 6 is used to drive the first locking member 5 to automatically slide in the direction of inserting the first locking portion 51 into the first locking slot 311a. In this embodiment, the first locking mechanism is unlocked when the first locking member 5 slides to the left or right and to the inner side of the seat 1 in the locked state, and the elastic force of the first elastic member 6 drives the first locking member 5 to slide to the left or right and to the outer side of the seat 1 to lock the first locking mechanism.

[0068] The second locking mechanism comprises a second locking member 7 movably arranged on one of the seat 1 and the base 4, and a second locking slot 111 arranged on the other and matched with the second locking member 7. When the second locking mechanism is in the locked state, the second locking member 7 is partially inserted into the second locking slot 111, thereby locking the relative position between the seat 1 and the base 4, so that the seat 1 cannot rotate relative to the base 4, as shown in Figure 9 and Figure 10 When the second locking mechanism is in the unlocked state, the second locking member 7 is completely out of the second locking slot 111, and the seat 1 can drive the backrest 2 and the armrest 3 to rotate relative to the base 4, as shown in Figure 19 and Figure 20 .

[0069] Specifically, as shown in Figure 32 , the second locking member 7 is provided with a second locking portion 71. When the second locking mechanism is in the locked state, the second locking portion 71 is inserted into the second locking slot 111, as shown in Figure 9 and Figure 10 When the second locking mechanism is in the unlocked state, the second locking portion 71 is out of the second locking slot 111, as shown in Figure 19 and Figure 20 .

[0070] In this embodiment, the second locking mechanism is arranged inside the rotating joint, the second locking member 7 is slidably arranged on the base 4 in the front-rear direction, and the second locking slot 111 is arranged on the second joint seat 11. In this way, the width dimension of the rotating joint in the left-right direction can be reduced, and the width dimension of the seat mechanism in the left-right direction can be reduced accordingly.

[0071] As shown in Figure 23 The base 4 is further provided with a first sliding groove 41 extending in the front-rear direction, the first sliding groove 41 is matched with the second locking member 7, and the second locking member 7 is slidably arranged in the first sliding groove 41 in the extension direction of the first sliding groove 41. The sliding of the second locking member 7 can be guided and limited by the matching of the first sliding groove 41 and the second locking member 7.

[0072] As shown in Figure 9 , Figure 10 , Figures 14-17 , Figures 19-22 , Figure 27 and Figure 28 The second joint seat 11 is further provided with a second sliding groove 112 extending in the circumferential direction thereof, and the second locking groove 111 is communicated with the second sliding groove 112. When the second locking portion 71 is out of the second locking groove 111, the second locking portion 71 enters the second sliding groove 112. At this time, when the seat 1 drives the backrest 2 and the armrest 3 to rotate relative to the base 4, the second locking portion 71 moves in the extension direction of the second sliding groove 112.

[0073] The second locking mechanism further comprises a second elastic member (not shown in the figure), one end of the second elastic member is arranged on the component of the seat 1 and the base 4 in which the second locking member 7 is arranged, in this embodiment, one end of the second elastic member is arranged on the base 4, and the other end of the second elastic member is arranged on the second locking member 7. The elastic force of the second elastic member is used to drive the second locking member 7 to automatically slide in the direction of inserting the second locking portion 71 into the second locking groove 111. In this embodiment, the second locking mechanism is unlocked when the second locking member 7 is slid backward in the locked state, and the elastic force of the second elastic member drives the second locking member 7 to slide forward to lock the second locking mechanism.

[0074] The third locking mechanism is arranged in the rotating joint, and the third locking mechanism can adopt the structure in the prior art. For example, the third locking mechanism comprises a locking tooth slidably arranged between the first joint seat 21 and the second joint seat 11, and the first joint seat 21 and the second joint seat 11 are both provided with a tooth groove engaged with the locking tooth. When the third locking mechanism is in the locked state, the locking tooth is engaged with the tooth groove on the first joint seat 21 and the second joint seat 11 respectively. When the third locking mechanism is in the unlocked state, the locking tooth is engaged with the tooth groove on the first joint seat 21 and is disengaged from the tooth groove on the second joint seat 11; or, the locking tooth is engaged with the tooth groove on the second joint seat 11 and is disengaged from the tooth groove on the first joint seat 21.

[0075] The seat mechanism further comprises an unlocking mechanism, which can unlock the third locking mechanism when the third locking mechanism operates the unlocking mechanism in the locked state. The unlocking mechanism can adopt the structure in the prior art. For example, the unlocking mechanism comprises an unlocking operating member, an unlocking driving member and a traction cable. The unlocking operating member is slidably arranged on the backrest 2. The unlocking driving member is rotatably or slidably arranged in the first joint seat 21, and the unlocking driving member is matched with the locking tooth. One end of the traction cable is arranged on the unlocking operating member, and the other end of the traction cable is arranged on the unlocking driving member. When the unlocking operating member is operated, the unlocking driving member is pulled by the traction cable to rotate or slide in the first joint seat 21, and acts on the locking tooth, thereby driving the locking tooth to slide and unlocking the third locking mechanism.

[0076] When the third locking mechanism is unlocked and the backrest 2 rotates towards the seat 1 during folding of the stroller, the first locking mechanism can be unlocked. In this way, the first locking mechanism does not need to be separately operated during folding of the seat mechanism, and the unlocking of the first locking mechanism can be achieved through linkage of the rotation of the backrest 2, so that the operation of unlocking the first locking mechanism is convenient, and the folding operation of the seat mechanism is facilitated.

[0077] When the third locking mechanism is unlocked and the backrest 2 rotates towards the seat 1 during folding of the stroller, the second locking mechanism can also be unlocked. In this way, the second locking mechanism does not need to be separately operated during folding of the stroller, and the unlocking of the second locking mechanism can be achieved through linkage of the rotation of the backrest 2, so that the operation of unlocking the second locking mechanism is convenient, and the folding operation of the stroller is facilitated.

[0078] In this embodiment, when the backrest 2 rotates from the initial position towards the seat 1, the first locking mechanism is unlocked first, and the armrest 3 can automatically rotate towards the seat 1 under the action of its own gravity, and the backrest 2 continues to rotate to a certain angle relative to the seat 1, and then the second locking mechanism is unlocked, so that the seat 1 drives the backrest 2 and the armrest 3 to rotate relative to the base 4 and approach the stroller frame. During this folding process, the armrest 3 does not block the folding of the backrest 2, and at the same time, it helps the folding process of the seat mechanism to be smoother and the folded state to be more compact.

[0079] In other embodiments, the second locking mechanism can be unlocked first, and then the first locking mechanism can be unlocked, or the first locking mechanism and the second locking mechanism can be unlocked simultaneously when the backrest 2 rotates from the initial position towards the seat 1.

[0080] Specifically, as shown in FIG. 1, the first locking mechanism comprises a first locking tooth 31 arranged on the seat 1 and a first locking operating member 32 arranged on the backrest 2. The first locking operating member 32 is slidably arranged on the backrest 2. The first locking tooth 31 is matched with the first locking operating member 32. When the first locking operating member 32 is operated, the first locking tooth 31 is driven to slide, thereby unlocking the first locking mechanism. Figure 24 and Figure 25As shown, the backrest 2 is provided with a first unlocking part, when the seat mechanism is folded from the unfolded state, and the backrest 2 is turned to the seat 1 to close, the first unlocking part can cooperate with the first locking part 5, so that the first unlocking part acts on the first locking part 5, and the first locking part 5 slides to the left or right relative to the seat 1 and to the inside of the seat 1, so as to be separated from the first locking slot 311a, that is, the first locking mechanism is unlocked, and the backrest 2 is turned relative to the seat 1 by the first stroke from the initial position.

[0081] In this embodiment, the first joint seat 21 is provided with a first convex part 211 which is convex outward from the outer contour surface thereof, and the first unlocking part is a first inclined surface 211a provided on the first convex part 211. The first locking part 5 is provided with a second inclined surface 52 which is matched with the first inclined surface 211a, as shown in Figure 24 、 Figure 25 and Figure 31 .

[0082] When the seat mechanism is in the unfolded state, the first convex part 211 is located at the lower part of the first joint seat 21 and in front of the first locking part 5, and the first inclined surface 211a is in abutting cooperation with the second inclined surface 52. When the backrest 2 is turned to the direction of closing to the seat 1, the first locking part 5 slides to the left or right relative to the seat 1 and to the inside of the seat 1 by the action of the first inclined surface 211a and the second inclined surface 52, so as to unlock the first locking mechanism. When the seat mechanism is in the unfolded state, the first inclined surface 211a and the second inclined surface 52 can also be in a state of disengagement, but when the backrest 2 is turned to the direction of closing to the seat 1 by a certain angle, the first inclined surface 211a and the second inclined surface 52 can also be in abutting cooperation.

[0083] When the seat mechanism is in the folded state, the first inclined surface 211a is away from the second inclined surface 52.

[0084] When the seat mechanism is in the folded state, the first locking part 5 slides to the left or right and to the outside of the seat 1 by a certain distance under the elastic force of the first elastic part 6, and the first convex part 211 is located behind the first locking part 5, so as to block the first convex part 211 by the first locking part 5, so that the backrest 2 is not easy to turn away from the seat 1 without external force, so as to keep the seat mechanism in the folded state.

[0085] The first convex part 211 is further provided with a third inclined surface 211b, and the first locking part 5 is further provided with a fourth inclined surface 53 which is matched with the third inclined surface 211b, as shown in Figure 9 、 Figure 10 and Figure 14When the seat mechanism is unfolded from the folded state, the backrest 2 rotates in a direction away from the seat 1, so that the third inclined surface 211b abuts against the fourth inclined surface 53, and the third inclined surface 211b acts on the fourth inclined surface 53, thereby causing the first locking member 5 to slide to the left or right and to the inner side of the seat 1, gradually away from the first protrusion 211, so that the backrest 2 can rotate in a direction away from the seat 1 to unfold the seat mechanism. When the seat mechanism is in the unfolded state, the third inclined surface 211b is away from the fourth inclined surface 53.

[0086] In this embodiment, the fourth inclined surface 53 and the second inclined surface 52 are symmetrically arranged on opposite sides of the first locking member 5, which makes the structure of the first locking member 5 simple and facilitates processing and manufacturing.

[0087] As shown in Figure 24 and Figure 26 , the backrest 2 is provided with a second unlocking portion 212a. When the seat mechanism is in the unfolded state, the second unlocking portion 212a is disengaged from the cooperation with the second locking member 7, as shown in Figure 9 and Figure 10 . When the backrest 2 rotates a second stroke in a direction approaching the seat 1 from the initial position, the second unlocking portion 212a cooperates with the second locking member 7, as shown in Figure 14 and Figure 15 . When the backrest 2 continues to rotate in this direction, the second unlocking portion 212a acts on the second locking member 7, causing the second locking member 7 to slide backward relative to the base 4, thereby gradually disengaging from the second locking slot 111, as shown in Figure 16 and Figure 17 , until the second locking mechanism is unlocked, as shown in Figure 19 and Figure 20 .

[0088] The second stroke can be the same as the first stroke, that is, when the first locking mechanism is unlocked, the second unlocking portion 211a cooperates with the second locking member 7. The second stroke can also be greater than the first stroke. When the backrest 2 rotates relative to the seat 1 to the folded state, the second locking mechanism is unlocked.

[0089] In this embodiment, as shown in Figure 24 and Figure 26 , the middle part of the first joint seat 21 is provided with a column portion 212, the column portion 212 is sleeved outside the rotation axis of the rotating joint, and the second unlocking portion 212a protrudes outward from the column portion 212. As shown in Figure 32 , the second locking member 7 is provided with a receiving groove 72, and the side wall of the receiving groove 72 is provided with a cooperating portion 721 cooperating with the second unlocking portion 212a, and the column portion 212 and the second unlocking portion 212a are rotatably arranged in the receiving groove 72.

[0090] When the seat mechanism is in the unfolded state, the second unlocking portion 212a is away from the cooperating portion 721, as shown inFigure 9 and Figure 10 As shown. When the seat mechanism folds the backrest 2 and rotates it a second stroke from the initial position, the second unlocking part 212a is located in front of the mating part 721 and engages with the mating part 721, as shown. Figure 14 and Figure 15 As shown, when the backrest 2 continues to rotate towards the seat 1, the second unlocking part 212a moves backward. Through the abutting action of the second unlocking part 212a and the mating part 721, the second locking member 7 slides backward relative to the base 4, as shown. Figure 16 and Figure 17 As shown, this unlocks the second locking mechanism, as... Figure 19 and Figure 20 As shown.

[0091] The dimensions of the receiving groove 72 must meet the requirement that the second unlocking part 212a can rotate around the axis of the rotating joint in the receiving groove 72, so that when the second locking mechanism is unlocked, when the seat 1, backrest 2 and armrest 3 rotate relative to the base 4 and move closer to the trolley frame, there will be no interference between the receiving groove 72 and the second unlocking part 212a, which will affect its normal rotation, and the seat mechanism can rotate and move closer to the trolley frame.

[0092] like Figure 5 As shown, the seating mechanism may also include a footrest 8, one end of which is rotatably connected to the front of the seat 1. When the seating mechanism is in the unfolded state, the footrest 8 extends forward and downward from its connection with the seat 1. When the seating mechanism is folded, the footrest 8 can rotate upward to be located in front of the seat 1.

[0093] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A seating mechanism characterized by: The seat mechanism has an unfolded state and a folded state, and comprises a seat, a backrest, an armrest and a base, the seat, the backrest, the armrest and the base are rotationally connected with each other, the seat mechanism further comprises a first locking mechanism arranged between the armrest and the seat to lock the relative position of the armrest and the seat, and a second locking mechanism arranged between the seat and the base to lock the relative position of the seat and the base, the backrest is provided with a first unlocking part and a second unlocking part; when the seat mechanism folds the backrest to rotate and approach the seat, the first unlocking part can cooperate with the first locking mechanism, and the second unlocking part can cooperate with the second locking mechanism, so that the first locking mechanism and the second locking mechanism are unlocked respectively.

2. The seating mechanism of claim 1, wherein: When the seat mechanism folds the backrest to rotate a first stroke from an initial position, the first locking mechanism is unlocked; when the seat mechanism folds the backrest to rotate a second stroke from the initial position, the second unlocking part cooperates with the second locking mechanism, and the second stroke is not less than the first stroke.

3. The seating mechanism of claim 1 or 2, wherein: When the seat mechanism is in the unfolded state, the first unlocking part cooperates with the first locking mechanism, and the cooperation between the second unlocking part and the second locking mechanism is disengaged; when the backrest rotates relative to the seat to the folded state, the second locking mechanism is unlocked; And / or, the seat, the backrest, the armrest and the base are rotationally connected with each other through a rotary joint, one of the first locking mechanism and the second locking mechanism is arranged outside the rotary joint, and the other is arranged inside the rotary joint.

4. The seating mechanism of claim 3, wherein: The first locking mechanism is arranged outside the rotary joint, and the rotary joint comprises a first joint seat fixedly arranged on the backrest, and the first unlocking part is arranged outside the first joint seat; The first joint seat is provided with a first convex part protruding outward from the outer profile surface thereof, and the first unlocking part is arranged on the first convex part.

5. The seating mechanism of claim 4, wherein: The first locking mechanism comprises a first locking piece movably arranged on one of the seat and the armrest, and a first locking groove arranged on the other and matched with the first locking piece; When the first locking mechanism is in the locked state, the first locking piece is inserted into the first locking groove; When the first locking mechanism is in the unlocked state, the first locking piece is disengaged from the first locking groove, and the first unlocking part cooperates with the first locking piece; The first locking mechanism further comprises a first elastic piece, one end of the first elastic piece is arranged on the component of the seat and the armrest on which the first locking piece is arranged, and the other end of the first elastic piece is arranged on the first locking piece.

6. The seating mechanism of claim 5, wherein: The first unlocking part is a first inclined surface arranged on the first convex part, and the first locking piece is provided with a second inclined surface matched with the first inclined surface; when the seat mechanism is converted from the unfolded state to the folded state, the first inclined surface can be matched with the second inclined surface by abutting against each other; when the seat mechanism is in the folded state, the first inclined surface is away from the second inclined surface; And / or, the first convex part is further provided with a third inclined surface, and the first locking member is further provided with a fourth inclined surface matched with the third inclined surface; when the seat mechanism is switched from the folded state to the unfolded state, the third inclined surface is capable of being matched with the fourth inclined surface; when the seat mechanism is in the unfolded state, the third inclined surface is away from the fourth inclined surface. And / or, the rotary joint further comprises a second joint base fixedly arranged at the rear part of the seat, the second joint base extending upward from the rear part of the seat, and the first locking member is slidably arranged at the rear part of the seat in the left-right direction. The rotary joint further comprises a third joint base fixedly arranged at the armrest, the third joint base being provided with a second convex part protruding outward from the outer contour surface of the third joint base, and the first locking groove is arranged on the second convex part.

7. The seating mechanism of claim 3, wherein: The second locking mechanism is arranged inside the rotary joint, and the rotary joint further comprises a first joint base fixedly arranged at the backrest, and the second unlocking part is arranged inside the first joint base.

8. The seating mechanism of claim 7, wherein: The second locking mechanism comprises a second locking member movably arranged on one of the seat and the base and a second locking groove arranged on the other of the seat and the base and matched with the second locking member; when the second locking mechanism is in the locked state, the second locking member is inserted into the second locking groove; When the second locking mechanism is in the unlocked state, the second locking member is separated from the second locking groove, and the second unlocking part is matched with the second locking member; The second locking mechanism further comprises a second elastic member, one end of the second elastic member being arranged on the component of the seat and the base on which the second locking member is arranged, and the other end of the second elastic member being arranged on the second locking member.

9. The seating mechanism of claim 8, wherein: The rotary joint further comprises a second joint base fixedly arranged at the rear part of the seat, the base being rotatably arranged outside the second joint base to form an outer cover of the rotary joint, and the second locking member is slidably arranged on the base in the front-rear direction, and the second locking groove is arranged on the second joint base; The second locking member is provided with a receiving groove, the sidewall of the receiving groove is provided with a matching part matched with the second unlocking part, and the second unlocking part is rotatably arranged in the receiving groove; when the seat mechanism is in the unfolded state, the second unlocking part is away from the matching part; when the seat mechanism is folded and the backrest is rotated by a second stroke from the initial position, the second unlocking part is matched with the matching part.

10. A vehicle characterized by: A seat mechanism as claimed in any one of claims 1-9 is arranged on a chassis.

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