Foldable seat frame for baby carriage

Abstract

The present invention discloses a foldable seat frame for a baby carriage, comprising a seat body that can be connected to the child carriage frame, a lower supporting linkage mechanism that is connected to the seat body and can be unfolded or folded relative to the seat body, and a handlebar is connected to the lower supporting linkage mechanism; a transmission mechanism is provided between the handlebar and the handrail, and the transmission mechanism can drive the lower supporting linkage mechanism to unfold or fold when the handlebar rotates relative to the support rod to unfold or fold; therefore, the present invention has the characteristics of convenient unfolding and folding, high safety, strong practicality, reasonable design and simple structure.

Description

[Technical field]

[0001] The invention relates to a baby carriage, in particular to a foldable seat frame for the baby carriage. [Background technology]

[0002] Strollers have become an indispensable product for infants and young children to grow up. Many strollers on the market currently include a foldable stroller frame and a seat frame connected to the stroller frame. When folding, the seat frame is folded first, and then the stroller frame is folded, so that the stroller can be folded as a whole. However, the seat frame of such strollers currently has the following shortcomings: the seat frame has a complex structure, is inconvenient to fold, occupies a large space after folding, is not compact enough, and makes the folded stroller inconvenient to carry and store. In addition, when folding, the current seat frame needs to be unlocked twice or multiple times, and there are also problems of complex operation and complex structure.

[0003] Therefore, the present invention is studied and proposed in view of the above problems. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a foldable seat frame for a baby carriage, which can improve the problems existing in the prior art and has the characteristics of convenient unfolding and folding, high safety, strong practicality, reasonable design and simple structure.

[0005] The present invention is achieved through the following technical solutions:

[0006] The present invention discloses a foldable seat frame for a baby carriage, which can be changed from an unfolded state to a folded state after a locking device 100 is unlocked, and comprises a seat body 1 that can be connected to the child carriage frame, a lower support linkage mechanism connected to the seat body 1 that can be unfolded or folded relative to the seat body 1, and a handlebar 3 is connected to the lower support linkage mechanism; the lower support linkage mechanism comprises:

[0007] A support rod 2, wherein the lower side of the support rod 2 is rotatably connected to the front side of the seat body 1, and the upper end of the support rod 2 is rotatably connected to the lower end of the handlebar 3 around a fifth axis A5;

[0008] A handrail 4, wherein the handrail 4 is rotatably connected to the support rod 2 around a first axis A1;

[0009] A supporting link 5, wherein the lower side of the supporting link 5 is rotatably connected to the rear side of the seat body 1, and the upper end of the supporting link 5 is rotatably connected to the rear end of the handrail rod 4 around the second axis A2;

[0010] A transmission mechanism is provided between the handlebar rod 3 and the handrail rod 4, which can drive the lower supporting linkage mechanism to unfold or fold when the handlebar rod 3 rotates relative to the support rod 2 to unfold or fold.

[0011] As described above, a foldable seat frame for a baby carriage, the transmission mechanism includes a transmission rod 6, the lower end of the transmission rod 6 is rotatably connected to the handrail rod 4 around the third axis A3, and the upper end of the transmission rod 6 is rotatably connected to the handlebar 3 and close to the lower end of the handlebar 3 around the fourth axis A4.

[0012] As described above, a foldable seat frame for a baby carriage has a U-shaped front armrest bar 41 between the front ends of the two armrest bars 4, one end of the front armrest bar 41 is connected to the front end of one armrest bar 4, and the other end of the front armrest bar 41 is connected to the front end of the other armrest bar 4.

[0013] In the foldable seat frame for a baby carriage as described above, the front end of the seat body 1 is rotatably connected to a front rod 7 for supporting the legs of a child.

[0014] In the foldable seat frame for a baby carriage as described above, the rear end of the seat body 1 is rotatably connected to a backrest assembly 8 for supporting the back of a child.

[0015] As described above, a foldable seat frame for a baby carriage, the backrest assembly includes two backrest connecting rods 81 rotatably connected to the rear end of the seat body 1, a U-shaped backrest rod 82 is provided between the two backrest connecting rods 81, one end of the backrest rod 82 is rotatably connected to one backrest connecting rod 81, and the other end of the backrest rod 82 is rotatably connected to the other backrest connecting rod 81; a locking structure 83 is provided between the backrest rod 82 and the backrest connecting rod 81, which can lock the two relative to each other when the backrest rod 82 is rotated and unfolded relative to the backrest connecting rod 81.

[0016] As described above, in a foldable seat frame for a baby carriage, the locking structure 83 includes a locking recess 831 provided at the lower end of a backrest rod 82, a locking protrusion 832 is provided on the backrest connecting rod 81 and can be engaged with the locking recess 831 when the backrest rod 82 is rotated and unfolded relative to the backrest connecting rod 81, and a spring is provided between the locking protrusion 832 and the backrest connecting rod 81 and can keep the locking protrusion 832 engaged in the locking recess 831 when the backrest rod 82 is rotated and unfolded relative to the backrest connecting rod 81.

[0017] In the foldable seat frame for a baby carriage as described above, the locking device 100 is arranged between the support rod 2 and the handlebar 3 , and the handlebar 3 is provided with an unlocking structure 200 capable of unlocking the locking device 100 .

[0018] As described above, a foldable seat frame for a baby stroller, the locking device 100 comprises a left shell 110 disposed at the lower end of the handlebar 3 and a right shell 120 disposed at the upper end of the support rod 2 and capable of rotating relative to the left shell 110, the left shell 110 and the right shell 120 enclose a cavity, the cavity is provided with a rotating block 130 capable of rotating therein and a spline 140 capable of moving laterally therein, the rotating block 130 has a plurality of inclined convex ... The spline 140 is provided with a plurality of oblique grooves 141 which can cooperate with the oblique protrusions 131 and drive the spline 140 to move laterally when the rotating block 130 rotates. The left shell 110 and the right shell 120 are provided with a slot 150 which can simultaneously engage with the spline 140. A spring 160 is provided between the spline 140 and the right shell 120 for resetting the spline 140. A pull rope 170 for pulling the rotating block 130 to rotate is provided in the handlebar 3.

[0019] In the foldable seat frame for a baby carriage as described above, a locking structure 300 is provided between the left shell 110 and the right shell 120 to lock the two shells with each other after the handlebar 3 is rotated and folded relative to the support rod 2.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. When folding, the present invention first unlocks the locking device, operates the handlebar to flip forward and downward with the fifth axis, and at the same time, the handlebar drives the support rod to rotate downward with the connecting shaft between the front side of the seat body and the lower side of the support rod as the rotation axis, that is, the support rod moves closer to the side of the seat body, and the handlebar moves closer to the side of the support rod and moves closer to the side of the seat body. At the same time, the handlebar cooperates with the transmission mechanism to drive the front part of the handrail rod to rotate downward with the first axis as the rotation axis, that is, the front part of the handrail rod moves closer to the lower end of the support rod, and at the same time, the rear end of the handrail rod cooperates with the supporting connecting rod to rotate downward with the connecting shaft between the lower side of the supporting connecting rod and the rear side of the seat as the rotation axis, that is, the handrail rod and the supporting connecting rod move closer to the side of the seat support, thereby realizing the overall folding of the seat frame. When unfolding, the handlebar rod is operated to flip upward and backward with the fifth axis as the rotation axis until the handlebar rod is in an unfolded state relative to the support rod. At the same time, the handlebar rod drives the support rod to rotate upward with the connecting shaft between the front side of the seat body and the lower side of the support rod as the rotation axis, that is, the support rod flips away from the seat body until it is unfolded and used. At the same time, the handlebar cooperates with the transmission mechanism to pull the front part of the handrail rod to rotate upward with the first axis as the rotation axis, and the rear end of the handrail rod pulls the supporting connecting rod to rotate upward and forward with the connecting axis between the lower side of the supporting connecting rod and the rear side of the seat as the rotation axis, thereby realizing the overall unfolding of the seat frame. Therefore, the present invention can achieve the effect of one-key folding or one-key unfolding, and at the same time it is easy to operate, stable in structure, and simple in structure.

[0022] 2. The present invention provides a transmission rod between the armrest rod and the handlebar rod. When the handlebar rod is rotated and unfolded relative to the support rod, that is, when the handlebar rod and the support rod are on the same axis, a triangular structure is formed between the first axis, the third axis and the fourth axis, thereby locking the lower support linkage mechanism; when the handlebar rod is rotated and folded relative to the support rod, that is, when the handlebar rod and the support rod are not on the same axis, a quadrilateral structure is formed between the first axis, the third axis, the fourth axis and the fifth axis, thereby unlocking the lower support linkage structure. Therefore, when folding, the present invention only needs to unlock one locking device to unlock the entire seat frame, replacing the traditional complex structure of using multiple locking devices to lock the seat frame, which is easy to operate and reduces manufacturing costs.

Brief Description of the Drawings

[0023] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 It is one of the structural schematic diagrams of the present invention in the unfolded state.

[0025] Figure 2 This is the second structural schematic diagram of the present invention in the unfolded state.

[0026] Figure 3 It is a side view of the present invention in the unfolded state.

[0027] Figure 4 for Figure 3 A magnified schematic diagram of B.

[0028] Figure 5 This is one of the structural parts diagrams of the locking device of the present invention.

[0029] Figure 6 This is the second structural parts diagram of the locking device of the present invention.

[0030] Figure 7 This is one of the schematic diagrams of the folding process of the present invention when changing from an unfolded state to a folded state.

[0031] Figure 8 This is the second schematic diagram of the folding process of the present invention when changing from the unfolded state to the folded state.

[0032] Fig. 9 It is a schematic diagram of the folding completion when the present invention is transformed from an unfolded state to a folded state.

[0033] Fig.10 It is a side view of the folding completion of the present invention when changing from an unfolded state to a folded state.

[0034] Fig.11 The figure is a schematic diagram of the present invention when it is connected to a child bicycle frame. [Specific implementation method]

[0035] The following is combined with Figure 1-11 Embodiments of the present invention are described in detail.

[0036] like Figure 1-11 As shown, the present invention is a foldable seat frame for a baby carriage, which can be changed from an unfolded state to a folded state after the locking device 100 is unlocked, and includes a seat body 1 that can be connected to the child frame, a lower support linkage mechanism connected to the seat body 1 and capable of being unfolded or folded relative to the seat body 1, and a handlebar rod 3 is connected to the lower support linkage mechanism; the lower support linkage mechanism includes a support rod 2, a handrail rod 4, and a support connecting rod 5, the lower side of the support rod 2 is rotatably connected to the front side of the seat body 1, and the upper end of the support rod 2 is rotatably connected to the lower end of the handlebar rod 3 around a fifth axis A5; the handrail rod 4 is rotatably connected to the support rod 2 around a first axis A1; the lower side of the support connecting rod 5 is rotatably connected to the rear side of the seat body 1, and the upper end of the support connecting rod 5 is rotatably connected to the rear end of the handrail rod 4 around a second axis A2.

[0037] A transmission mechanism is provided between the handlebar 3 and the handrail 4, which can drive the lower supporting linkage mechanism to unfold or fold when the handlebar 3 rotates relative to the support rod 2 to unfold or fold. When folding, the locking device is first unlocked, and the handlebar is operated to flip forward and downward along the fifth axis. At the same time, the handlebar drives the support rod to rotate downward with the connecting shaft between the front side of the seat body and the lower side of the support rod as the rotation axis, that is, the support rod moves closer to one side of the seat body, and the handlebar moves closer to one side of the support rod and moves closer to one side of the seat body. At the same time, the handlebar cooperates with the transmission mechanism to drive the front part of the handrail rod to rotate downward with the first axis as the rotation axis, that is, the front part of the handrail rod moves closer to the lower end of the support rod, and at the same time, the rear end of the handrail rod cooperates with the supporting connecting rod to rotate downward with the connecting shaft between the lower side of the supporting connecting rod and the rear side of the seat as the rotation axis, that is, the handrail rod and the supporting connecting rod move closer to one side of the seat support, thereby realizing the overall folding of the seat frame.

[0038] When unfolding, the operating handlebar is flipped upward and backward with the fifth axis as the rotation axis until the handlebar is in the unfolded state relative to the support rod. At the same time, the handlebar drives the support rod to rotate upward with the connecting axis between the front side of the seat body and the lower side of the support rod as the rotation axis, that is, the support rod flips to the side away from the seat body until it is unfolded and used. At the same time, the handlebar cooperates with the transmission mechanism to pull the front part of the handrail rod to rotate upward with the first axis as the rotation axis, and the rear end of the handrail rod pulls the supporting connecting rod to rotate upward and forward with the connecting axis between the lower side of the supporting connecting rod and the rear side of the seat as the rotation axis, thereby realizing the overall unfolding of the seat frame. Therefore, the present invention can achieve the effect of one-key folding or one-key unfolding, and at the same time, it is convenient to operate, stable in structure, and simple in structure.

[0039] like Figure 1-3As shown in 7-10, the transmission mechanism includes a transmission rod 6, the lower end of which is connected to the handrail rod 4 for rotation around the third axis A3, and the upper end of which is connected to the handlebar rod 3 for rotation around the fourth axis A4 near the lower end of the handlebar rod 3. The present invention provides a transmission rod between the handrail rod and the handlebar, and when the handlebar rod is rotated and unfolded relative to the support rod, that is, when the handlebar rod and the support rod are on the same axis, a triangular structure is formed between the first axis, the third axis and the fourth axis, so that the lower support linkage mechanism can be locked; when the handlebar rod is rotated and folded relative to the support rod, that is, when the handlebar rod and the support rod are not on the same axis, a quadrilateral structure is formed between the first axis, the third axis, the fourth axis and the fifth axis, so that the lower support linkage structure is unlocked. Therefore, when the present invention is folded, only one locking device needs to be unlocked to unlock the entire seat frame, replacing the traditional complex structure of using multiple locking devices to lock the seat frame, which is convenient to operate and reduces manufacturing costs.

[0040] like Figure 1-2 As shown, according to design requirements, a U-shaped handrail front bar 41 is provided between the front ends of the two handrail bars 4, one end of the handrail front bar 41 is connected to the front end of one handrail bar 4, and the other end of the handrail front bar 41 is connected to the front end of the other handrail bar 4.

[0041] like Figure 1-2 As shown, in order to make the baby more comfortable and safe when riding, the front end of the seat body 1 is rotatably connected to a front rod 7 for supporting the child's legs.

[0042] like Figure 1-2 As shown, in order to make the baby more comfortable and safe when sitting, the rear end of the seat body 1 is rotatably connected to a backrest assembly 8 for supporting the child's back.

[0043] like Figure 1-4 As shown, the backrest assembly includes two backrest connecting rods 81 rotatably connected to the rear end of the seat body 1, and a U-shaped backrest rod 82 is arranged between the two backrest connecting rods 81, one end of the backrest rod 82 is rotatably connected to one backrest connecting rod 81, and the other end of the backrest rod 82 is rotatably connected to the other backrest connecting rod 81; a locking structure 83 is arranged between the backrest rod 82 and the backrest connecting rod 81, which can lock the two relative to each other when the backrest rod 82 is rotated and unfolded relative to the backrest connecting rod 81. When folding, the backrest rod 82 is operated to flip forward along the rotation axis between the backrest rod 82 and the backrest connecting rod 81, so that the backrest rod 82 is close to the backrest connecting rod 81, and then the backrest connecting rod 81 is operated to drive the backrest rod 82 to flip forward along the connection axis between the backrest connecting rod 81 and the seat body 1, so that the two are close to one side of the seat body. After folding, the overall volume of the seat frame is small, which is convenient for transportation and taking.

[0044] like Figure 4As shown, the locking structure 83 includes a locking recess 831 provided at the lower end of the backrest rod 82, and the backrest connecting rod 81 is provided with a locking protrusion 832 which can be engaged with the locking recess 831 when the backrest rod 82 is rotated and unfolded relative to the backrest connecting rod 81, and a spring is provided between the locking protrusion 832 and the backrest connecting rod 81, which can keep the locking protrusion 832 engaged in the locking recess 831 when the backrest rod 82 is rotated and unfolded relative to the backrest connecting rod 81. When unfolded, the backrest rod 82 and the backrest connecting rod 81 can be stably connected, the backrest rod 82 can be prevented from rotating relative to the backrest connecting rod 81, and misoperation can be prevented, thereby having high safety.

[0045] like Figure 1-2 As shown, according to design requirements, the locking device 100 is arranged between the support rod 2 and the handle rod 3, and the handle rod 3 is provided with an unlocking structure 200 that can unlock the locking device 100.

[0046] like Figure 5 , 6 As shown, the locking device 100 includes a left shell 110 arranged at the lower end of the handlebar rod 3 and a right shell 120 arranged at the upper end of the support rod 2 and rotatable relative to the left shell 110, the left shell 110 and the right shell 120 surround a cavity, and a rotating block 130 that can rotate therein and a spline 140 that can move laterally therein are provided in the cavity, and a circular array of a plurality of inclined protrusions 131 with inclined surfaces are provided on the rotating block 130, and a plurality of inclined grooves 141 that can cooperate with the inclined protrusions 131 and can drive the spline 140 to move laterally when the rotating block 130 rotates are provided on the spline 140, and a card slot 150 that can be simultaneously engaged with the spline 140 is provided on the left shell 110 and the right shell 120, and a spring 160 for resetting the spline 140 is provided between the spline 140 and the right shell 120, and a pull rope 170 for pulling the rotating block 130 to rotate is provided in the handlebar rod 3. The unlocking structure 200 is an unlocking portion disposed on the handlebar 3 and can be connected to the rotating block 130 via a pull rope 170 .

[0047] When unlocking, the user operates the unlocking part and drives the rotating block 130 to rotate by pulling the rope 170, so that the inclined protrusion 131 on the rotating block 130 cooperates with the inclined groove 141 on the spline 140 to guide and cooperate, so that the spline 140 moves laterally in the cavity and toward the right shell 120 side, that is, the spline 140 is disengaged from the slot 150 of the left shell 110, and the spring 160 is compressed. At this time, the right shell 120 can rotate relative to the left shell 110, thereby unlocking the locking device 100, that is, unlocking the handlebar and the support rod.

[0048] like Figure 5 , 6As shown, a locking structure 300 is provided between the left shell 110 and the right shell 120, which can lock the two together after the handlebar 3 is rotated and folded relative to the support rod 2. After folding, the locking structure 300 of the present invention can lock the support rod and the handlebar relative to each other to prevent the handlebar from unfolding relative to the support rod after folding, which is convenient for transportation, storage and taking.

[0049] like Figure 5 , 6 As shown, the locking structure 300 includes a locking slot 310 provided on the right shell body 120, and the left shell body 110 is provided with a locking block 320 which can be inserted into the locking slot 310 to lock the left shell body 110 and the right shell body 120 with each other when the handle bar 3 is rotated and folded relative to the support bar 2, and a reset spring is provided between the locking block 320 and the left shell body 110 to reset the locking block 320, which is not marked in the figure. When the handlebar 110 and the right shell 120 are unfolded, the side walls of the locking block 320 and the locking slot 310 are aligned with each other, and the reset spring drives the locking block 320 to fit into the locking slot 310, thereby locking the left shell 110 and the right shell 120 to each other. When the handlebar 110 and the right shell 120 are unfolded relative to the support rod, because the side walls of the locking block 320 and the side walls of the locking slot 310 are arc surfaces that guide and cooperate with each other, the side walls of the locking block 320 cooperate with the side walls of the locking slot 310 to compress the reset spring, thereby disengaging the locking block 320 from the locking slot 310, thereby unlocking the left shell 110 and the right shell 120.

Claims

1. A foldable seat frame for a baby carriage, which can be changed from an unfolded state to a folded state after a locking device (100) is unlocked, characterized in that The invention comprises a seat body (1) which can be connected to a child bicycle frame, a lower support linkage mechanism connected to the seat body (1) and capable of being unfolded or folded relative to the seat body (1), and a handlebar (3) being connected to the lower support linkage mechanism; the lower support linkage mechanism comprises: A support rod (2), wherein the lower side of the support rod (2) is rotatably connected to the front side of the seat body (1), and the upper end of the support rod (2) is rotatably connected to the lower end of the handlebar (3) around a fifth axis (A5); A handrail (4), the handrail (4) being rotatably connected to the support rod (2) about a first axis (A1); A supporting connecting rod (5), wherein the lower side of the supporting connecting rod (5) is rotatably connected to the rear side of the seat body (1), and the upper end of the supporting connecting rod (5) is rotatably connected to the rear end of the handrail rod (4) around a second axis (A2); A transmission mechanism is provided between the handlebar (3) and the handrail (4), which can drive the lower support linkage mechanism to unfold or fold when the handlebar (3) rotates relative to the support rod (2) to unfold or fold; A U-shaped front handrail rod (41) is provided between the front ends of the two handrail rods (4), one end of the front handrail rod (41) is connected to the front end of one handrail rod (4), and the other end of the front handrail rod (41) is connected to the front end of the other handrail rod (4); The rear end of the seat body (1) is rotatably connected to a backrest assembly (8) for supporting the back of a child; the backrest assembly comprises two backrest connecting rods (81) rotatably connected to the rear end of the seat body (1); a U-shaped backrest rod (82) is provided between the two backrest connecting rods (81); one end of the backrest rod (82) is rotatably connected to one backrest connecting rod (81), and the other end of the backrest rod (82) is rotatably connected to the other backrest connecting rod (81); a locking structure (83) is provided between the backrest rod (82) and the backrest connecting rod (81) so that the two can be relatively locked when the backrest rod (82) is rotated and unfolded relative to the backrest connecting rod (81); The locking device (100) is arranged between the support rod (2) and the handle rod (3), and the handle rod (3) is provided with an unlocking structure (200) capable of unlocking the locking device (100).

2. A foldable seat frame for a baby carriage according to claim 1, characterized in that The transmission mechanism comprises a transmission rod (6), the lower end of the transmission rod (6) being rotationally connected to the handrail rod (4) around a third axis (A3), and the upper end of the transmission rod (6) being rotationally connected to the handlebar rod (3) and close to the lower end of the handlebar rod (3) around a fourth axis (A4).

3. A foldable seat frame for a baby carriage according to claim 1, characterized in that The front end of the seat body (1) is rotatably connected to a front rod (7) for supporting the legs of a child.

4. A foldable seat frame for a baby carriage according to any one of claims 1 to 3, characterized in that The locking structure (83) comprises a locking recess (831) provided at the lower end of the backrest rod (82); a locking protrusion (832) is provided on the backrest connecting rod (81) and can be engaged with the locking recess (831) when the backrest rod (82) is rotated and unfolded relative to the backrest connecting rod (81); and a spring is provided between the locking protrusion (832) and the backrest connecting rod (81) and can keep the locking protrusion (832) engaged in the locking recess (831) when the backrest rod (82) is rotated and unfolded relative to the backrest connecting rod (81).

5. A foldable seat frame for a baby carriage according to any one of claims 1 to 3, characterized in that The locking device (100) comprises a left housing (110) arranged at the lower end of a handlebar (3) and a right housing (120) arranged at the upper end of a support bar (2) and rotatable relative to the left housing (110), wherein the left housing (110) and the right housing (120) enclose a cavity, wherein a rotating block (130) rotatable therein and a spline (140) lateral movable therein are arranged in the cavity, wherein a plurality of inclined protrusions (131) having inclined surfaces are arranged in a circumferential array on the rotating block (130), and the spline (140) is provided with a plurality of inclined protrusions (131) having a circumferential array on the rotating block (130). ) is provided with a plurality of oblique grooves (141) capable of cooperating with the oblique protrusions (131) and driving the spline (140) to move laterally when the rotating block (130) rotates, the left housing (110) and the right housing (120) are provided with engaging grooves (150) capable of simultaneously engaging with the spline (140), a spring (160) for resetting the spline (140) is provided between the spline (140) and the right housing (120), and a pull rope (170) for pulling the rotating block (130) to rotate is provided in the handlebar (3).

6. A foldable seat frame for a baby carriage according to claim 5, characterized in that A locking structure (300) is provided between the left housing (110) and the right housing (120) and is capable of locking the two together after the handlebar (3) is rotated and folded relative to the support rod (2).

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