Structure convenient to unfold and fold between separated seat of baby carriage and carriage frame

Abstract

The invention discloses a structure convenient to unfold and fold between a separated seat of a baby carriage and a carriage frame, which is characterized in that a carriage frame connector on the seat can be separated from or combined with the carriage frame, when a seat back frame of the seat combined with the carriage frame is folded, an armrest frame is linked to be close to a seat part together, and a first linkage element and a second linkage element which are arranged on the seat back frame are linked; when the seat is unfolded, the vehicle frame unlocking element on the vehicle frame connector is driven to unlock the vehicle frame and keep an unlocking state, so that the vehicle frame generates a folding action, and the vehicle frame unlocking element is linked to retract and return to the original position along with the folding and closing action of the vehicle frame and the seat, so that the vehicle frame is released from the original unlocking state before the seat is unfolded. The folded frame can be independently unfolded and positioned by a single hand, and then the seat on the stable frame which is completely unfolded and positioned can be smoothly unfolded by a single hand.

Description

Technical Field

[0001] The present invention relates to a seat on a baby stroller frame. During the folding process, the frame is unlocked by extending a frame unlocking element thereon. After the frame and the seat are folded together, the frame unlocking element that was originally extended is retracted back to its original position, so that the frame can be unfolded and positioned at any time. After the frame is unfolded and positioned, the user can operate the unfolding of the seat, and the unfolding operation can be completed with one hand throughout the whole process. Background Art

[0002] The one-handed folding and unfolding technology of baby strollers has been seen on different brands for many years, but the most common one is that the seat is a part of the frame and cannot be separated, which is also easier to design. However, if the seat and frame are detachable, the structural design of the one-handed folding and unfolding operation is more complicated and difficult.

[0003] The applicant's previous application number is CN202120338935, and the name is "A separate seat that can be unlocked when folding the baby stroller frame". The main technical method is: through a frame connector on the seat, it can be assembled and disassembled on the seat connector of the frame, wherein the rear side of the seat portion of the seat is pivoted to a seat back frame with an adjustable reclining angle and pivoted to the frame connector, and an armrest frame is pivoted slightly in the middle of the seat portion, and a guide groove is provided at the pivot of the seat back frame, which can guide the seat portion when the seat back frame is folded forward. A seat unlocking element is provided to slide to drive the clutch outer gear originally meshed between the armrest frame and the seat to disengage to one side, so that the seat back frame and the armrest frame are moved forward and close to the seat. At the same time, an inclined abutment surface is also provided on the pivot end face of the seat back frame, which abuts against a seat engaging member with a corresponding inclined abutment surface that is meshed on the seat and accommodated in the frame connector. The seat engaging member is disengaged from the seat by the folding of the seat back frame, and the frame unlocking element on the frame connector is pushed to drive the frame to be unlocked so that it can be folded.

[0004] However, after the frame and the seat are folded, the frame unlocking element that was originally extended cannot be retracted back to its original position, resulting in the frame always being in an unlocked state. If the frame is to be unfolded and locked, the seat must be unfolded first, and the frame unlocking element thereon must be retracted and reset. Only then can the frame always be in an unlocked state and the frame can be unfolded and locked.

[0005] However, when the frame is not unfolded and locked, there will be a problem similar to the patent CN201920304543 of the applicant, "Baby stroller frame folding device that can be unlocked by folding the seat" Fig.15The handle 3 in the figure is the same as the handle 3 in the figure, because the handle 3 will swing down due to the gravity in the unlocked state, resulting in the tendency of driving the front legs 4 and the rear legs 5 to fold toward the middle, and the frame will be unstable, causing the frame to be difficult to stabilize when the seat is unfolded, and difficulty will occur when applying force, that is, when applying force upward and backward to unfold the seat back, the frame will be in danger of sliding or tipping over, resulting in that when the seat is unfolded, one hand must hold the frame and the other hand must operate the unfolding of the seat. When the seat is unfolded and the frame is unlocked, the frame can be unfolded and positioned. Based on the above inconveniences and difficulties, the operator cannot smoothly unfold the stroller with one hand, especially when the operator is holding a baby or carrying objects in one hand, the unfolding operation of the above-mentioned stroller is indeed quite inconvenient. Summary of the invention

[0006] Therefore, in order to improve the inconvenience of one-handed unfolding of the aforementioned known baby stroller with a detachable frame and seat, the purpose of the present invention is to provide a detachable seat, which can unlock the frame and keep it together when folded, so that the detachable seat of the baby stroller can be easily unfolded and retracted with the frame, and in the process of folding and folding the frame and the seat together, the frame is released from the original unlocked state, so that the frame can be unfolded by itself before the seat is unfolded, and the seat on the frame can be unfolded after it stands firmly, so that the unfolding operation can be carried out more smoothly and the whole process can be completed with one hand.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: the present invention provides a structure of a detachable seat of a baby stroller that is easy to expand and retract with the frame, a seat including a backrest frame and a seat portion, the lower end of the backrest frame and the rear end of the seat portion are each provided with a pivot portion, the pivot portion is pivotally fixed to a frame connector, a frame unlocking element with an elastic retraction function and a seat portion engaging member that is non-rotatable and axially elastically clamps the seat portion, an armrest frame that can be folded and expanded in conjunction with the folding and expansion of the backrest frame is pivotally arranged in the middle of the seat portion: a first linkage element that is rotatable and abuts against the backrest frame is axially arranged at the inner center of the pivot portion of the backrest frame, and the two opposing surfaces on which the two abut are 180 degrees opposite to each other At the two ends of the frame, there are respectively provided with first engaging teeth in the shape of raised wedges that correspond in opposite directions and can be stuck to each other; at the center of the pivot portion of the seat portion, a second linking element that cannot rotate but can axially move and can abut against the first linking element is provided, and the second linking element is on the side corresponding to the frame connector, and between the upper end of the frame unlocking element, there are corresponding engaging inclined surfaces that abut against each other; at two opposite points of 180 degrees where the first linking element and the second linking element abut, there are respectively provided with second engaging teeth in the shape of raised wedges that correspond in opposite directions and can be stuck to each other, and each second engaging tooth includes an inclined abutting surface, a flat abutting surface connected to the highest point of the inclined abutting surface, and an inclined pushing surface connected to the end of the flat abutting surface.

[0008] Therefore, through the folding action of the seat back frame of the seat of the present invention, the first linkage element is driven to rotate, and the rotating first linkage element will abut the second linkage element to move away, and then the second linkage element will push the elastically retractable frame unlocking element to extend, unlocking the frame to generate a folding action, allowing the seat and the frame to be folded together, and in the process of folding and swinging, the original mutual abutment points of the first and second linkage elements are staggered, and under the action of the retraction elastic force of the frame unlocking element, the second linkage element is retracted onto the first linkage element, and the frame unlocking element will also retract to its original position, thereby releasing the unlocked state of the frame, allowing the frame to be unfolded before the seat is unfolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic diagram of the separated seat of the baby carriage of the present invention.

[0010] Figure 2 This is a perspective view of the seat seat, the seat back frame and the vehicle frame connector of the present invention.

[0011] Figure 3 This is a second perspective exploded view of the seat portion of the present invention, the seat back frame, and the vehicle frame connector.

[0012] Figure 4 It is a schematic diagram of the positions of the seat back frame, the first and second linkage elements, and the vehicle frame unlocking element when the seat of the present invention is unfolded.

[0013] Figure 5 It is a cross-sectional view of the pivotal position between the seat portion, the seat back frame and the vehicle frame connector when the seat of the present invention is unfolded.

[0014] Figure 6 It is a side schematic diagram of the seat of the present invention when it is unfolded.

[0015] Figure 7 It is a schematic diagram of the chair back frame and the armrest frame of the chair of the present invention when they are folded onto the seat.

[0016] Figure 8 yes Figure 7 Schematic diagram of the seat back frame driving the first and second linkage elements and the frame unlocking element in the state.

[0017] Fig. 9 yes Figure 7 A cross-sectional view of the pivotal connection between the seat, the back frame and the frame connector in the forward position.

[0018] Fig.10 It is a schematic diagram when the chair back frame of the present invention is swung slightly downward.

[0019] Fig.11It is a schematic diagram of the chair back frame of the present invention when it is swung downward to about 150 degrees.

[0020] Fig.12 yes Fig.11 Schematic diagram of the operation of the first and second linkage elements and the frame unlocking element in the state.

[0021] Fig.13 yes Fig.11 A cross-sectional view of the pivotal connection between the seat, the back frame and the frame connector in the forward position.

[0022] Fig.14 It is a schematic diagram of the frame unlocking element of the present invention driving the second linkage element after retreating.

[0023] Fig.15 It is a cross-sectional view of the pivotal connection between the rear seat portion and the seat back frame and the frame connector after the frame unlocking element of the present invention is retracted.

[0024] Fig.16 It is a side schematic diagram of the seat of the present invention after it is completely folded.

[0025] Fig.17 It is a schematic diagram of the seat back frame of the seat of the present invention when it is unfolded upward.

[0026] Fig.18 It is a schematic diagram showing that the backrest frame of the chair of the present invention is unfolded upwards and drives the seat part to flip upwards.

[0027] Description of Figure Numbers:

[0028] 1-seat; 10, 20-pivot; 101, 201-convex clamping part; 2-backrest frame; 21, 51-first engaging tooth; 3-frame connector; 4-armrest frame; 5-first linkage element; 52, 62-second engaging tooth; 521, 621-oblique abutment surface; 522, 622-flat abutment surface; 523, 623-oblique push surface; 6-second linkage element; 61, 81-abutment inclined surface; 7-seat clamping part; 70-through slot; 8-frame unlocking element; 9-pivot shaft. DETAILED DESCRIPTION

[0029] See also Figure 1 , Figure 2The split seat on the stroller frame shown in the figure comprises a seat portion 1 having a foldable armrest frame 4 thereon and a seat back frame 2 which can be adjusted to different rearward tilt angles. A pivot portion 10 and a pivot portion 20 are respectively provided at the rear end of the seat portion 1 and the lower end of the seat back frame 2. The pivot portion 10, the pivot portion 20 and a frame connector 3 are pivotally fixed together by a pivot shaft 9, so that the seat portion 1 and the seat back frame 2 can swing around the frame connector 3 as the center, and when the seat back frame 2 is folded toward the seat portion 1, the armrest frame 4 will be moved together to move toward the seat portion 1; conversely, after the folded seat back frame 2 is unfolded upward from the seat portion 1 to the sitting position, the armrest frame 4 will be moved upward to the position for surrounding the baby.

[0030] Please cooperate again Figure 3 , Figure 4 , Figure 5 As shown, the pivoting portion 20 of the above-mentioned chair back frame 2 is provided with a first linkage element 5 that abuts against it. At two locations of 180 degrees opposite to each other on the surfaces where the pivoting portion 20 and the first linkage element 5 abut against each other, there are respectively provided with first wedge-shaped and corresponding first meshing teeth 21 and first meshing teeth 51 that can be engaged with each other at their vertical surfaces; at two locations of 180 degrees opposite to each other on the other end surface of the first linkage element 5, there are also provided with oppositely corresponding meshing teeth, namely, second meshing teeth 52. Each of the second meshing teeth 52 includes a gradually rising inclined abutting surface 521 and a flat abutting surface 522 connected thereto, and an inclined push surface 523 is connected to the end of the flat abutting surface 522.

[0031] The frame connector 3 is provided with a frame unlocking element 8 which can extend downward and has an elastic retraction function (for example, it is pushed inward and retracted by a spring force). The upper end of the frame unlocking element 8 is provided with an abutting inclined surface 81 facing the seat 1. The frame connector 3 is also provided with a seat engaging member 7 which is non-rotatable along the pivot axis 9 but can be axially moved. When the seat engaging member 7 moves axially to the left and right, it can engage with and retract from the corresponding surface of the pivot portion 10 of the seat 1. A through slot 70 is provided below the central pivot of the seat engaging member 7. In addition, a second linkage element 6 which can abut against the seat engaging member 7 and is non-rotatable along the pivot axis 9 but can be axially moved is provided on the side corresponding to the seat 1. The second linkage element 6 is located at the center of the pivot portion 10 of the seat 1, and the second linkage element 6 is provided with an abutting inclined surface 61 on the side corresponding to the seat engaging member 7, so that the abutting inclined surface 61 of the second linkage element 6 and the abutting inclined surface 81 of the frame unlocking element 8 are in a corresponding state that can abut each other, and the abutting inclined surface 61 and the abutting inclined surface 81 can be passed into the through groove 70 of the seat engaging member 7. In addition, two opposite positions of 180 degrees on the other end surface of the second linkage element 6 are respectively provided with oppositely corresponding wedge-shaped second engaging teeth 62, and each second engaging tooth 62, similarly, includes a gradually rising inclined abutting surface 621 and a flat abutting surface 622 connected thereto, and an inclined push surface 623 is connected to the end of the flat abutting surface 622.

[0032] like Figure 6 , Figure 7 As shown, when the baby carriage is folded, the seat back frame 2 of the seat is folded forward and downward to a position of about 90 degrees with the frame connector 3 as the rotation center, and the armrest frame 4 is also folded toward the seat portion 1. The seat back frame 2 and the first linkage element 5 are engaged with each other through the first meshing teeth 21 and the first meshing teeth 51 (as shown in the previous figure). Figure 2 , 3 As shown), Figure 8 , 9 As shown, after the first linkage element 5 is driven to rotate, the second engaging tooth 52 on the rotating first linkage element 5 abuts against the second engaging tooth 62 of the non-rotating second linkage element 6 on the inclined abutment surfaces 521, 621, so that the second linkage element 6 gradually moves axially to the left until the flat abutment surfaces 522, 622 between the first linkage element 5 and the second linkage element 6 abut against each other. The second linkage element 6 also pushes the seat engaging member 7 to completely retract into the interior of the frame connector 3, so that the seat engaging member 7 releases the simultaneous engagement with the pivoting portion 10 of the seat 1 and the connector 3, allowing the seat 1 to be unlocked on the frame connector 3, allowing the seat 1 to swing downward, and through the abutment inclined surfaces 61, 81 between the second linkage element 6 and the frame unlocking member 8, the frame unlocking member 8 is driven to extend outward from the frame connector 3, and the frame of the baby stroller itself is also unlocked at the same time.

[0033] Therefore, when the unlocked frame is swung down by the hand push frame thereon under the action of gravity, the front wheel frame and the rear wheel frame are moved together, and the seat 1 and the armrest frame 4 are also moved together. Fig.10 , 11 As shown, the seat back frame 2 is folded toward the frame and rotated together with the seat back frame 2. When the seat back frame 2 is folded about 150 degrees forward on the frame, the seat back frame 2 will be as shown. Fig.12 , 13 As shown, the first linkage element 5 is continuously driven to rotate, so that the inclined push surface 523 of the second meshing tooth 52 thereon corresponds to the inclined push surface 623 on the second linkage element 6 and just abuts against each other. At this moment, the second linkage element 6, which can only move axially but cannot rotate, is pushed by the elastic retraction of the frame unlocking element 8, driving the second linkage element 6 to push the first linkage element 5, thereby driving the first linkage element 5 to rotate in the same direction as the folding and swinging direction of the seat back frame 2, until the inclined push surface 623 of the second linkage element 6 passes the inclined push surface 523 of the first linkage element 5, which is as shown in FIG. Fig.14 , 15 As shown, the highest point of the second engaging tooth 62 of the second linkage element 6 will fall on the lowest point of the second engaging tooth 52 of the first linkage element 5. At this time, the frame unlocking element 8 will retract onto the frame connector 3, so that the previously unlocked state of the frame is released. At the same time, the seat back frame 2 is out of engagement with the first linkage element 5 and can continue to swing downward until it is folded against the frame. At this time, the first linkage element 5 has just rotated 180 degrees, that is, the first linkage element 5 and the second linkage element 6 are rotated to the initial state before being folded.

[0034] Therefore, when the frame is completely folded, the seat portion 1, the seat back frame 2 and the armrest frame 4 of the seat are also brought together with the frame, and the seat is in a folded state as shown in FIG. Fig.16 As shown in FIG. 1 , at this time, the unlocked state of the frame is released after the frame unlocking element 8 retracts, so the frame can independently perform the operation of unfolding and positioning regardless of whether the seat is unfolded or not, so the user can not only unfold the frame with one hand, but also the unfolded frame can stand firmly (because the unlocked state of the frame has been released at this time, so the frame is automatically locked again after being unfolded to the position). At this time, Fig.17 , 18As shown, when the user also flips the seat back frame 2 upward to a predetermined angle with one hand, the convex clamping portion 201 convexly provided at the outer edge of the pivoting portion 20 of the seat back frame 2 is mutually locked with the convex clamping portion 101 provided at the corresponding position of the seat 1, and then when the seat back frame 2 is continuously flipped, the seat 1 will be driven to flip upward until the frame connector 3 gradually extends the spring of the frame unlocking element 8 so that the abutting inclined surface 81 pushes the abutting inclined surface 61 of the second linkage element 6, so that the second linkage element 6 moves axially toward the direction of the seat 1 and drives the seat engaging member 7 to move axially, so that the seat engaging member 7 is again engaged in the pivoting portion 10 of the seat 1 (as shown in FIG. Figure 5 the seat back frame 2 also continues to flip backwards, allowing the convex clamping portion 201 thereon to pass through the convex clamping portion 101 of the seat portion 1, until the armrest frame 4 is driven to flip up to the position, the seat back frame 2 will also be stuck and stop, that is, the seat is unfolded to its most initial state.

[0035] Therefore, the frame can be unfolded before the seat is unfolded, that is, the hand push frame is lifted up and turned to link the front and rear wheel frames to unfold and position, and the seat back frame 2 of the seat is flipped upward and backward through the stable frame and its center of gravity after unfolding, and even after the frame is braked, the operating force when the seat 1 and the armrest frame 4 are unfolded together will not produce uncertain movement influence on the frame, so that the unfolding operation of the seat can be carried out smoothly. Therefore, the unfolding of the entire frame and the seat can be smoothly and easily completed with one hand operation.

Claims

1. A structure of a baby stroller detachable seat that is easy to unfold and retract with a frame, wherein the seat comprises a backrest frame and a seat portion, wherein the lower end of the backrest frame and the rear end of the seat portion are each provided with a pivoting portion, wherein the pivoting portion is pivotally fixed to a frame connector, wherein a frame unlocking element with an elastic retracting function and a seat portion engaging member that is non-rotatable and axially elastically engaged with the seat portion are provided in the frame connector, wherein an armrest frame that can be folded and extended in conjunction with the folding and extension of the backrest frame is pivotally provided in the middle of the seat portion, Features: The backrest frame has a first linkage element at the center of the inner side of the pivot portion thereof, which is rotatable and abuts against the first linkage element. Two positions of the abutting surface of the two are 180 degrees opposite to each other, respectively provided with first engaging teeth in the shape of raised wedges that correspond to each other in opposite directions and can be locked with each other. The seat portion has a second linking element disposed at the center of the pivoting portion thereof, which is non-rotatable and axially movable and can abut against the first linking element. The second linking element is provided with an abutting inclined surface that abuts against the upper end of the frame unlocking element on the side corresponding to the frame connector. At two locations 180 degrees opposite to each other where the first linkage element and the second linkage element abut each other, there are respectively provided with second engaging teeth in the shape of raised wedges that correspond in opposite directions and can be relatively clamped. Each second engaging tooth includes an inclined abutment surface, a flat abutment surface connected to the highest point of the inclined abutment surface, and an inclined push surface located at the end of the flat abutment surface.

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