CN113147879A - Foldable seat frame for baby carriage - Google Patents

Foldable seat frame for baby carriage Download PDF

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Publication number
CN113147879A
CN113147879A CN202110457303.6A CN202110457303A CN113147879A CN 113147879 A CN113147879 A CN 113147879A CN 202110457303 A CN202110457303 A CN 202110457303A CN 113147879 A CN113147879 A CN 113147879A
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CN
China
Prior art keywords
rod
backrest
seat frame
locking
handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110457303.6A
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Chinese (zh)
Inventor
刘修平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unitron Enterprises Zhuhai Co ltd
Original Assignee
Unitron Enterprises Zhuhai Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unitron Enterprises Zhuhai Co ltd filed Critical Unitron Enterprises Zhuhai Co ltd
Priority to CN202110457303.6A priority Critical patent/CN113147879A/en
Publication of CN113147879A publication Critical patent/CN113147879A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/10—Perambulator bodies; Equipment therefor
    • B62B9/102—Perambulator bodies; Equipment therefor characterized by details of the seat
    • B62B9/104—Perambulator bodies; Equipment therefor characterized by details of the seat with adjustable or reclining backrests

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)

Abstract

The invention discloses a foldable seat frame for a baby carrier, which comprises a seat main body capable of being connected to a baby carrier frame, wherein a lower supporting linkage mechanism which can be unfolded or folded relative to the seat main body is connected to the seat main body, and a handle rod is connected to the lower supporting linkage mechanism; a transmission mechanism which can drive the lower support linkage mechanism to unfold or fold when the handle rod rotates relative to the support rod to unfold or fold is arranged between the handle rod and the grab rail; therefore, the foldable bicycle has the characteristics of convenience in unfolding and folding, high safety, strong practicability, reasonable design and simple structure.

Description

Foldable seat frame for baby carriage
[ technical field ] A method for producing a semiconductor device
The invention relates to a baby carriage, in particular to a foldable seat frame for the baby carriage.
[ background of the invention ]
The children's carriage has become an indispensable product in the growth process of infants. Many of the children's vehicles on the current market include a foldable frame and a seat frame connected to the frame. When the folding child stroller is folded, the seat frame is firstly folded, and then the frame of the child stroller is folded, so that the integral folding of the child stroller is realized. However, the seat frame of the current children's carriage has the following defects: the seat frame is complex in structure, inconvenient to fold and operate, large in occupied space after being folded and not compact enough, so that the folded baby carriage is not convenient to carry and store, and the seat frame needs to be unlocked twice or many times when being folded, and the problems of complex operation and complex structure also exist.
Therefore, the present invention has been made in view of the above problems.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art, provides a foldable seat frame for a baby carrier, can solve the problems in the prior art, and has the characteristics of convenience in unfolding and folding, high safety, strong practicability, reasonable design and simple structure.
The invention is realized by the following technical scheme:
the invention discloses a foldable seat frame for a baby carrier, which can be changed from an unfolded state to a folded state after a locking device 100 is unlocked, and comprises a seat main body 1 connected to the baby carrier frame, a lower support linkage mechanism which is connected to the seat main body 1 and can be unfolded or folded relative to the seat main body 1, and a handle bar 3 connected to the lower support linkage mechanism; the lower support linkage mechanism includes:
the lower side of the supporting rod 2 is rotatably connected with the front side of the seat main body 1, and the upper end of the supporting rod 2 is rotatably connected with the lower end of the handle rod 3 around a fifth axis A5;
the grab rail 4 is connected with the supporting rod 2 in a rotating way around a first axis A1;
a support link 5, the lower side of the support link 5 is rotatably connected with the rear side of the seat body 1, and the upper end of the support link 5 is rotatably connected with the rear end of the grab bar 4 around a second axis A2;
and a transmission mechanism which can drive the lower support linkage mechanism to unfold or fold when the handle rod 3 rotates relative to the support rod 2 to unfold or fold is arranged between the handle rod 3 and the grab rail 4.
The foldable seat frame for the baby carrier comprises the transmission rod 6, the lower end of the transmission rod 6 is rotatably connected with the grab bar 4 around the third axis A3, and the upper end of the transmission rod 6 is rotatably connected with the handle rod 3 and close to the lower end of the handle rod 3 around the fourth axis A4.
According to the foldable seat frame for the baby carrier, the U-shaped handrail front rod 41 is arranged between the front ends of the two handrail rods 4, one end of the handrail front rod 41 is connected with the front end of one handrail rod 4, and the other end of the handrail front rod 41 is connected with the front end of the other handrail rod 4.
In the foldable seat frame for a stroller 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.
In the foldable seat frame for a baby carriage as described above, a backrest assembly 8 for supporting the back of a child is rotatably connected to the rear end of the seat body 1.
The foldable seat frame for the baby carriage comprises two backrest connecting rods 81 which are rotatably connected with the rear end of a seat main body 1, 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 with one backrest connecting rod 81, and the other end of the backrest rod 82 is rotatably connected with the other backrest connecting rod 81; a locking structure 83 which can lock the backrest rod 82 and the backrest connecting rod 81 when the backrest rod 82 rotates and unfolds relative to the backrest connecting rod 81 is arranged between the backrest rod 82 and the backrest connecting rod 81.
In the foldable seat frame for a stroller, the latch structure 83 includes a locking notch 831 provided at the lower end of the backrest rod 82, the backrest link 81 is provided with a locking protrusion 832 capable of being engaged with the locking notch 831 when the backrest rod 82 is unfolded and rotated relative to the backrest link 81, and a spring is provided between the locking protrusion 832 and the backrest link 81 to keep the locking protrusion 832 engaged with the locking notch 831 when the backrest rod 82 is unfolded and rotated relative to the backrest link 81.
In the foldable seat frame for a stroller, the locking device 100 is disposed between the support rod 2 and the handle rod 3, and the handle rod 3 is provided with the unlocking structure 200 capable of unlocking the locking device 100.
The foldable seat frame for children's carriage as described above, the locking device 100 includes a left housing 110 provided at the lower end of the handle bar 3 and a right housing 120 provided at the upper end of the support bar 2 and capable of rotating with respect to the left housing 110, the left shell 110 and the right shell 120 enclose a cavity, a rotating block 130 capable of rotating in the cavity and a spline 140 capable of moving transversely in the cavity are arranged in the cavity, a plurality of inclined protrusions 131 with inclined planes are circumferentially arrayed on the rotating block 130, a plurality of inclined grooves 141 which can be matched with the inclined protrusions 131 and can drive the spline 140 to transversely move when the rotating block 130 rotates are arranged on the spline 140, the left casing 110 and the right casing 120 are provided with a slot 150 capable of being engaged with the spline 140, a spring 160 for restoring the spline 140 is provided between the spline 140 and the right housing 120, and a pull rope 170 for pulling the rotation block 130 to rotate is provided in the handle bar 3.
In the foldable seat frame for a stroller, a locking structure 300 is disposed between the left housing 110 and the right housing 120, and the handle bar 3 and the support bar 2 can be locked together after being rotated relative to each other.
Compared with the prior art, the invention has the following advantages:
1. when the folding chair is folded, the locking device is unlocked, the handle rod is operated to turn forwards and downwards along a fifth axis, and meanwhile the handle rod drives the supporting rod to rotate downwards by taking a connecting shaft at the front side of the seat body and the lower side of the supporting rod as a rotating shaft, namely the supporting rod is drawn close to one side of the seat body, and the handle rod is drawn close to one side of the supporting rod and drawn close to one side of the seat body. Meanwhile, the handle rod is matched with the transmission mechanism to drive the front part of the armrest rod to rotate downwards by taking the first axis as a rotating shaft, namely, the front part of the armrest rod is drawn close to the lower end of the supporting rod, meanwhile, the rear end of the armrest rod is matched with the supporting connecting rod to rotate downwards by taking the connecting shaft at the lower side of the supporting connecting rod and the connecting shaft at the rear side of the seat as a rotating shaft, namely, the armrest rod and the supporting connecting rod are drawn close to one side of the seat support, so that the seat frame is integrally folded. When the handle rod is unfolded, the handle rod is operated to upwards and backwards overturn by taking the fifth axis as a rotating shaft until the handle rod is in an unfolded state relative to the supporting rod. Meanwhile, the handle bar drives the supporting rod to rotate upwards by taking the connecting shaft at the front side of the seat body and the lower side of the supporting rod as a rotating shaft, namely, the supporting rod turns over towards one side far away from the seat body until the supporting rod is unfolded for use. Meanwhile, the handle rod is matched with the transmission mechanism to pull the front part of the armrest rod to rotate upwards by taking the first axis as a rotating shaft, and the rear end of the armrest rod pulls the support connecting rod to rotate upwards and forwards by taking the connecting shaft at the lower side of the support connecting rod and the connecting shaft at the rear side of the seat as a rotating shaft, so that the seat frame can be integrally unfolded.
2. According to the invention, the transmission rod is arranged between the grab bar and the handle bar, when the handle bar rotates and unfolds relative to the support rod, namely the handle bar and the support rod are positioned on the same axis, a triangular structure is formed among the first axis, the third axis and the fourth axis, so that the lower support linkage mechanism can be locked; when the handle rod rotates and is folded relative to the supporting rod, namely the handle rod and the supporting rod are not positioned on the same axis, a quadrilateral structure is formed among the first axis, the third axis, the fourth axis and the fifth axis, so that the lower support linkage structure is unlocked.
[ description of the drawings ]
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
fig. 1 is one of the structural diagrams of the present invention in the unfolded state.
Fig. 2 is a second schematic structural view of the present invention in the unfolded state.
Fig. 3 is a side view of the present invention in the unfolded state.
Fig. 4 is an enlarged schematic view of B in fig. 3.
Fig. 5 is one of the structural parts of the locking device of the present invention.
Fig. 6 is a second structural part view of the locking device of the present invention.
Fig. 7 is a schematic view of the folding process of the present invention when transforming from the unfolded state to the folded state.
Fig. 8 is a second schematic view of the folding process of the present invention when transforming from the unfolded state to the folded state.
Fig. 9 is a view illustrating the completion of folding when the present invention is changed from the unfolded state to the folded state.
Fig. 10 is a folding completion side view of the present invention when transformed from an unfolded state to a folded state.
Figure 11 is a schematic view of the present invention when attached to a child's frame.
[ detailed description ] embodiments
Embodiments of the present invention will be described in detail below with reference to fig. 1 to 11.
As shown in fig. 1 to 11, the foldable seat frame for a stroller according to the present invention can be changed from an unfolded state to a folded state after a lock device 100 is unlocked, and includes a seat body 1 connectable to the stroller frame, a lower support linkage mechanism connected to the seat body 1 and capable of being unfolded or folded with respect to the seat body 1, and a handle bar 3 connected to the lower support linkage mechanism; the lower support linkage mechanism comprises a support rod 2, a grab rail 4 and a support connecting rod 5, the lower side of the support rod 2 is rotatably connected with the front side of the seat main body 1, and the upper end of the support rod 2 is rotatably connected with the lower end of the handle rod 3 around a fifth axis A5; the grab rail 4 is connected with the support rod 2 in a rotating way around a first axis A1; the lower side of the support connecting rod 5 is rotatably connected with the rear side of the seat body 1, and the upper end of the support connecting rod 5 is rotatably connected with the rear end of the grab bar 4 around a second axis A2.
And a transmission mechanism which can drive the lower support linkage mechanism to unfold or fold when the handle rod 3 rotates relative to the support rod 2 to unfold or fold is arranged between the handle rod 3 and the grab rail 4. When the folding chair is folded, the locking device is unlocked, the handle rod is operated to turn forwards and downwards along a fifth axis, and meanwhile the handle rod drives the supporting rod to rotate downwards by taking a connecting shaft at the front side of the seat body and the lower side of the supporting rod as a rotating shaft, namely the supporting rod is drawn close to one side of the seat body, and the handle rod is drawn close to one side of the supporting rod and drawn close to one side of the seat body. Meanwhile, the handle rod is matched with the transmission mechanism to drive the front part of the armrest rod to rotate downwards by taking the first axis as a rotating shaft, namely, the front part of the armrest rod is drawn close to the lower end of the supporting rod, meanwhile, the rear end of the armrest rod is matched with the supporting connecting rod to rotate downwards by taking the connecting shaft at the lower side of the supporting connecting rod and the connecting shaft at the rear side of the seat as a rotating shaft, namely, the armrest rod and the supporting connecting rod are drawn close to one side of the seat support, so that the seat frame is integrally folded.
When the handle rod is unfolded, the handle rod is operated to upwards and backwards overturn by taking the fifth axis as a rotating shaft until the handle rod is in an unfolded state relative to the supporting rod. Meanwhile, the handle bar drives the supporting rod to rotate upwards by taking the connecting shaft at the front side of the seat body and the lower side of the supporting rod as a rotating shaft, namely, the supporting rod turns over towards one side far away from the seat body until the supporting rod is unfolded for use. Meanwhile, the handle rod is matched with the transmission mechanism to pull the front part of the armrest rod to rotate upwards by taking the first axis as a rotating shaft, and the rear end of the armrest rod pulls the support connecting rod to rotate upwards and forwards by taking the connecting shaft at the lower side of the support connecting rod and the connecting shaft at the rear side of the seat as a rotating shaft, so that the seat frame can be integrally unfolded.
As shown in fig. 1-3 and 7-10, the transmission mechanism includes a transmission rod 6, the lower end of the transmission rod 6 is rotatably connected with the grab bar 4 around a third axis A3, and the upper end of the transmission rod 6 is rotatably connected with the handle bar 3 near the lower end of the handle bar 3 around a fourth axis a 4. According to the invention, the transmission rod is arranged between the grab bar and the handle bar, when the handle bar rotates and unfolds relative to the support rod, namely the handle bar and the support rod are positioned on the same axis, a triangular structure is formed among the first axis, the third axis and the fourth axis, so that the lower support linkage mechanism can be locked; when the handle rod rotates and is folded relative to the supporting rod, namely the handle rod and the supporting rod are not positioned on the same axis, a quadrilateral structure is formed among the first axis, the third axis, the fourth axis and the fifth axis, so that the lower support linkage structure is unlocked.
As shown in fig. 1-2, according to design requirements, a U-shaped front handrail rod 41 is disposed 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.
As shown in fig. 1 to 2, a front bar 7 for supporting the legs of a child is pivotally connected to the front end of the seat body 1 for making the infant more comfortable and safe when seated.
As shown in fig. 1 to 2, a back assembly 8 for supporting the back of a child is rotatably coupled to the rear end of the seat main body 1 in order to make the infant more comfortable and safe when seated.
As shown in fig. 1 to 4, 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 disposed 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 which can lock the backrest rod 82 and the backrest connecting rod 81 when the backrest rod 82 rotates and unfolds relative to the backrest connecting rod 81 is arranged between the backrest rod 82 and the backrest connecting rod 81. When the seat frame is folded, the backrest rod 82 is operated to upwards turn forwards through the rotating shaft 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, then the backrest connecting rod 81 is operated to drive the backrest rod 82 to upwards turn forwards through the connecting shaft between the backrest connecting rod 81 and the seat body 1, so that the backrest rod 82 and the seat body are close to one side of the seat body, and after the seat frame is folded, the seat frame is small in overall size and convenient to transport and take.
As shown in fig. 4, the locking structure 83 includes a locking notch 831 provided at a lower end of the backrest rod 82, the backrest link 81 is provided with a locking protrusion 832 capable of being engaged with the locking notch 831 when the backrest rod 82 rotates and unfolds relative to the backrest link 81, a spring is provided between the locking protrusion 832 and the backrest link 81 to keep the locking protrusion 832 engaged with the locking notch 831 when the backrest rod 82 rotates and unfolds relative to the backrest link 81, and when the backrest rod 82 unfolds relative to the backrest link 81, the backrest rod 82 and the backrest link 81 can be stably connected to prevent the backrest rod 82 from rotating relative to the backrest link 81, thereby preventing misoperation and ensuring high safety.
As shown in fig. 1-2, according to design requirements, the locking device 100 is disposed 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.
As shown in fig. 5 and 6, the locking device 100 includes a left housing 110 disposed at a lower end of a handle bar 3 and a right housing 120 disposed at an upper end of a support bar 2 and capable of rotating relative to the left housing 110, the left housing 110 and the right housing 120 define a cavity, a rotating block 130 capable of rotating therein and a spline 140 capable of moving laterally therein are disposed in the cavity, a plurality of inclined protrusions 131 having inclined surfaces are circumferentially arrayed on the rotating block 130, a plurality of inclined slots 141 capable of being engaged with the inclined protrusions 131 and driving the spline 140 to move laterally when the rotating block 130 rotates are disposed on the spline 140, clamping grooves 150 capable of being simultaneously clamped with the spline 140 are disposed on the left housing 110 and the right housing 120, a spring 160 for restoring the spline 140 is disposed between the spline 140 and the right housing 120, and a pull rope 170 for pulling the rotating block 130 is disposed in the handle bar 3. The unlocking structure 200 is an unlocking portion provided on the handle bar 3 and capable of being connected to the rotation block 130 through the pulling rope 170.
When unlocking, a user operates the unlocking part to drive the rotating block 130 to rotate through the pull rope 170, so that the inclined protrusion 131 on the rotating block 130 is matched with the inclined groove 141 on the spline 140 in a guiding way, the spline 140 is enabled to move transversely in the cavity and towards one side of the right shell 120, namely, the spline 140 is enabled to be separated from the clamping groove 150 of the left shell 110, the spring 160 is compressed, at the moment, the right shell 120 can rotate relative to the left shell 110, the locking device 100 is unlocked, and the handlebar and the supporting rod are unlocked.
As shown in fig. 5 and 6, a locking structure 300 is disposed between the left housing 110 and the right housing 120 for locking the handle bar 3 and the support bar 2 after the handle bar is rotated and folded relative to each other, and after the foldable bicycle is folded, the locking structure 300 can lock the support bar and the handle bar relative to each other, so as to prevent the handle bar from unfolding relative to the support bar after being folded, and facilitate transportation, storage and taking.
As shown in fig. 5 and 6, the locking structure 300 includes a locking slot 310 disposed on the right housing 120, a locking block 320 is disposed on the left housing 110 and can be inserted into the locking slot 310 when the handle bar 3 rotates and folds relative to the support bar 2 to lock the left housing 110 and the right housing 120 with each other, and a return spring, which is not shown in the drawings, is disposed between the locking block 320 and the left housing 110 to return the locking block 320. After the foldable electronic device is folded, the locking fixture 320 is aligned with the locking slot 310, and the reset spring drives the locking fixture 320 to be clamped into the locking slot 310, i.e. the left shell 110 and the right shell 120 are locked with each other; when the handle bar is unfolded relative to the support bar, because the side wall of the locking fixture block 320 and the side wall of the locking slot 310 are arc surfaces which are mutually guided and matched, the side wall of the locking fixture block 320 and the side wall of the locking slot 310 can compress the return spring, so that the locking fixture block 320 is separated from the locking slot 310, and the left shell 110 and the right shell 120 are unlocked.

Claims (10)

1. A folding seat frame for a baby carrier can be changed from an unfolding state to a folding state after a locking device (100) is unlocked, and is characterized by comprising a seat main body (1) which can be connected to a baby carrier frame, a lower supporting linkage mechanism which is connected to the seat main body (1) and can be unfolded or folded relative to the seat main body (1), and a handle bar (3) connected to the lower supporting linkage mechanism; the lower support linkage includes:
the lower side of the supporting rod (2) is rotatably connected with the front side of the seat main body (1), and the upper end of the supporting rod (2) is rotatably connected with the lower end of the handle rod (3) around a fifth axis (A5);
the grab rail rod (4), the grab rail rod (4) and the support rod (2) are connected around a first axis (A1) in a rotating way;
the lower side of the support connecting rod (5) is rotatably connected with the rear side of the seat main body (1), and the upper end of the support connecting rod (5) is rotatably connected with the rear end of the grab bar (4) around a second axis (A2);
a transmission mechanism which can drive the lower support linkage mechanism to unfold or fold when the handle rod (3) rotates to unfold or fold relative to the support rod (2) is arranged between the handle rod (3) and the grab rail (4).
2. A collapsible seat frame for a stroller according to claim 1, characterized in that the transmission mechanism comprises a transmission rod (6), the lower end of the transmission rod (6) being pivotally connected to the grab bar (4) about a third axis (A3), and the upper end of the transmission rod (6) being pivotally connected to the handlebar (3) near the lower end of the handlebar (3) about a fourth axis (a 4).
3. A foldable seat frame for children's carriage according to claim 1, characterized in that a U-shaped front handrail rod (41) is disposed 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).
4. A collapsible seat frame for a stroller according to claim 1, characterized in that a front bar (7) for supporting the legs of the child is pivotally connected to the front end of the seat body (1).
5. A collapsible seat frame for a stroller according to claim 1, characterized in that a backrest assembly (8) for supporting the back of a child is pivotally connected to the rear end of the seat body (1).
6. A foldable seat frame for children's carriage according to claim 5, characterized in that said 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 said two backrest connecting rods (81), one end of said backrest rod (82) is rotatably connected to one backrest connecting rod (81), and the other end of said backrest rod (82) is rotatably connected to the other backrest connecting rod (81); a locking structure (83) which can lock the backrest rod (82) and the backrest connecting rod (81) when the backrest rod (82) rotates and unfolds relative to the backrest connecting rod (81) is arranged between the backrest rod (82) and the backrest connecting rod (81).
7. A foldable seat frame for children's carriage according to claim 6, characterized in that said latch structure (83) comprises a locking notch (831) provided with a lower end of the backrest lever (82), said backrest lever (81) is provided with a locking protrusion (832) capable of being engaged with the locking notch (831) when the backrest lever (82) is unfolded by rotation relative to the backrest lever (81), and a spring is provided between the locking protrusion (832) and the backrest lever (81) for keeping the locking protrusion (832) engaged with the locking notch (831) when the backrest lever (82) is unfolded by rotation relative to the backrest lever (81).
8. A collapsible seat frame for children's carriages according to any of claims 1 to 7, characterised in that the locking device (100) is arranged between the support bar (2) and the handle bar (3), said handle bar (3) being provided with an unlocking structure (200) able to unlock the locking device (100).
9. A foldable seat frame for children's carriage according to claim 8, wherein said locking device (100) comprises a left housing (110) at the lower end of the handle bar (3) and a right housing (120) at the upper end of the support bar (2) and capable of rotating relative to the left housing (110), said left housing (110) and right housing (120) enclose a cavity, said cavity is provided with a rotating block (130) capable of rotating therein and a spline (140) capable of moving laterally therein, said rotating block (130) is circumferentially arrayed with a plurality of inclined protrusions (131) having inclined planes, said spline (140) is provided with a plurality of inclined slots (141) capable of cooperating with the inclined protrusions (131) and driving the spline (140) to move laterally when the rotating block (130) rotates, said left housing (110) and right housing (120) are provided with slots (150) capable of engaging with the spline (140) simultaneously, a spring (160) enabling the spline (140) to reset is arranged between the spline (140) and the right shell (120), and a pull rope (170) used for pulling the rotating block (130) to rotate is arranged in the handle rod (3).
10. A foldable seat frame for children's carriage according to claim 9, characterized in that a locking structure (300) is provided between the left housing (110) and the right housing (120) for locking the handle bar (3) and the support bar (2) after they are rotated relative to each other.
CN202110457303.6A 2021-04-27 2021-04-27 Foldable seat frame for baby carriage Pending CN113147879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110457303.6A CN113147879A (en) 2021-04-27 2021-04-27 Foldable seat frame for baby carriage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110457303.6A CN113147879A (en) 2021-04-27 2021-04-27 Foldable seat frame for baby carriage

Publications (1)

Publication Number Publication Date
CN113147879A true CN113147879A (en) 2021-07-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110457303.6A Pending CN113147879A (en) 2021-04-27 2021-04-27 Foldable seat frame for baby carriage

Country Status (1)

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CN (1) CN113147879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11667316B2 (en) * 2019-06-28 2023-06-06 Wonderland Switzerland Ag Infant carrier and backrest adjusting mechanism thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11667316B2 (en) * 2019-06-28 2023-06-06 Wonderland Switzerland Ag Infant carrier and backrest adjusting mechanism thereof

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