CN113147879B - Foldable seat frame for baby carriage - Google Patents

Foldable seat frame for baby carriage Download PDF

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Publication number
CN113147879B
CN113147879B CN202110457303.6A CN202110457303A CN113147879B CN 113147879 B CN113147879 B CN 113147879B CN 202110457303 A CN202110457303 A CN 202110457303A CN 113147879 B CN113147879 B CN 113147879B
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CN
China
Prior art keywords
rod
handle
backrest
bar
back support
Prior art date
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CN202110457303.6A
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Chinese (zh)
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CN113147879A (en
Inventor
刘修平
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Hubei Aiying Technology Co ltd
SUNNYLOVE BABY PRODUCTS ZHUHAI CO LTD
Original Assignee
Hubei Aiying Technology Co ltd
SUNNYLOVE BABY PRODUCTS ZHUHAI CO LTD
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Priority to CN202110457303.6A priority Critical patent/CN113147879B/en
Publication of CN113147879A publication Critical patent/CN113147879A/en
Application granted granted Critical
Publication of CN113147879B publication Critical patent/CN113147879B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62BHAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/10Perambulator bodies; Equipment therefor
    • B62B9/102Perambulator bodies; Equipment therefor characterized by details of the seat
    • B62B9/104Perambulator 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

本发明公开了一种童车用可收折的座位架,包括能连接在儿童车架上的座位主体,所述座位主体上连接的能相对座位主体展开或收折的下部支撑联动机构,所述下部支撑联动机构上连接有手把杆;所述手把杆与扶手杆之间设有当手把杆相对支撑杆转动展开或折叠时能带动下部支撑联动机构展开或折叠的传动机构;因此本发明具有展开和折叠便捷,安全性高,实用性强,设计合理、结构简单的特点。

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

Foldable seat frame for baby carrier
[ Field of technology ]
The invention relates to a baby carrier, in particular to a foldable seat frame for a baby carrier.
[ Background Art ]
Children's carriages have become an indispensable product in the growth of infants. Many of the children's vehicles on the market today include a folding child's vehicle frame and a seat frame attached to the child's vehicle frame. The seat frame is folded firstly and then the baby carriage frame is folded when the baby carriage is folded, so that the whole folding of the baby carriage is realized. However, the seat frame of the existing baby carrier has the defects that the structure of the seat frame is complex, the operation is inconvenient when the seat frame is folded, the occupied space after the folding is large, the seat frame is not compact enough, the folded baby carrier is inconvenient to carry and store, and the seat frame needs to be unlocked for two or more times when the seat frame is folded, and the operation and the structure are complex.
The present invention has been made in view of the above problems.
[ Invention ]
The foldable seat frame for the baby carrier provided by the invention aims to overcome the defects of the prior art, can solve the problems existing 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 relates to a foldable seat frame for a baby carrier, which can be changed from an unfolding state to a folding state after a locking device 100 is unlocked, and comprises a seat main body 1 capable of being connected to a baby carrier, 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 is connected to the lower support linkage mechanism, wherein the lower support linkage mechanism comprises:
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;
A grab bar 4, the grab bar 4 is rotatably connected with the support bar 2 around a first axis A1;
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 rail 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 and unfolds or folds relative to the support rod 2 is arranged between the handle rod 3 and the grab rail 4.
The foldable seat frame for the baby carrier comprises a transmission rod 6, wherein the lower end of the transmission rod 6 is rotatably connected with the grab rail 4 around a third axis A3, and the upper end of the transmission rod 6 is rotatably connected with the handle 3 and is close to the lower end of the handle 3 around a fourth axis A4.
The foldable seat frame for the baby carrier is characterized in that a 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.
A foldable seat frame for a baby carrier as described above, a front rod 7 for supporting the legs of a child is rotatably connected to the front end of the seat body 1.
A foldable seat frame for a baby carrier 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 carrier comprises two backrest connecting rods 81 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, the other end of the backrest rod 82 is rotatably connected with the other backrest connecting rod 81, and a locking structure 83 which can enable the backrest rod 82 to be locked relatively when the backrest rod 82 is rotatably unfolded relative to the backrest connecting rod 81 is arranged between the backrest rod 82 and the backrest connecting rod 81.
As described above, the latch 83 includes a locking recess 831 provided at a lower end of the back lever 82, a locking protrusion 832 capable of being engaged with the locking recess 831 when the back lever 82 is rotatably extended with respect to the back lever 81 is provided on the back lever 81, and a spring capable of maintaining the locking protrusion 832 engaged with the locking recess 831 when the back lever 82 is rotatably extended with respect to the back lever 81 is provided between the locking protrusion 832 and the back lever 81.
The foldable seat frame for the baby carrier is characterized in that the locking device 100 is arranged between the supporting rod 2 and the handle rod 3, and the handle rod 3 is provided with an unlocking structure 200 which can unlock the locking device 100.
The foldable seat frame for the baby carrier comprises a left shell 110 arranged at the lower end of a handle bar 3 and a right shell 120 arranged at the upper end of a supporting bar 2 and capable of rotating relative to the left shell 110, wherein a cavity is formed by the left shell 110 and the right shell 120, a rotating block 130 capable of rotating in the cavity and a spline 140 capable of transversely moving in the cavity are arranged in the cavity, a plurality of inclined protrusions 131 with inclined surfaces are circumferentially arranged on the rotating block 130, a plurality of inclined grooves 141 capable of being matched with the inclined protrusions 131 and capable of driving the spline 140 to transversely move when the rotating block 130 rotates are arranged on the spline 140, a clamping groove 150 capable of being simultaneously clamped with the spline 140 is arranged on the left shell 110 and the right shell 120, a spring 160 for resetting the spline 140 is arranged between the spline 140 and the right shell 120, and a pull rope 170 for pulling the rotating block 130 to rotate is arranged in the handle bar 3.
A foldable seat frame for a baby carrier is provided between the left housing 110 and the right housing 120, and a locking structure 300 is provided for locking the handle bar 3 and the support bar 2 after being pivoted and folded relative to each other.
Compared with the prior art, the invention has the following advantages:
1. when the folding seat is folded, the locking device is unlocked, the handle rod is operated to turn forwards and downwards by using the fifth axis, and meanwhile, the handle rod drives the supporting rod to rotate downwards by taking the connecting shaft at the front side of the seat main body and the lower side of the supporting rod as the rotating shaft, namely, the supporting rod is closed towards one side of the seat main body, and the handle rod is closed towards one side of the supporting rod and is closed towards one side of the seat main body. Meanwhile, the front part of the grab bar is driven to rotate downwards by the aid of the handle bar matched with the transmission mechanism by taking the first axis as a rotating shaft, namely the front part of the grab bar is close to the lower end of the supporting rod, and meanwhile, the rear end of the grab bar is matched with the supporting connecting rod to rotate downwards by taking the connecting shafts on the lower side of the supporting connecting rod and the rear side of the seat as rotating shafts, namely the grab bar and the supporting connecting rod are 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 turn upwards and backwards by taking the fifth axis as the rotating shaft until the handle rod is in an unfolded state relative to the support rod. Meanwhile, the handle rod drives the supporting rod to rotate upwards by taking the connecting shafts at the front side of the seat main body and the lower side of the supporting rod as rotating shafts, namely the supporting rod turns over to the side far away from the seat main 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 grab bar to rotate upwards by taking the first axis as a rotating shaft, and the rear end of the grab bar pulls the supporting connecting rod to rotate upwards and forwards by taking the connecting shaft at the lower side of the supporting connecting rod and the rear side of the seat as the rotating shaft, so that the integral unfolding of the seat frame is realized.
2. The lower support linkage mechanism is locked by arranging the transmission rod between the grab bar and the handle bar, and when the handle bar rotates and expands relative to the support bar, namely when the handle bar and the support bar are positioned on the same axis, a triangle structure is formed among the first axis, the third axis and the fourth axis, and when the handle bar rotates and folds relative to the support bar, namely when the handle bar and the support bar 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 invention is described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic view of the structure of the present invention in an unfolded state.
FIG. 2 is a second schematic view of the structure of the present invention in its unfolded state.
Fig. 3 is a side view of the invention in its deployed state.
Fig. 4 is an enlarged schematic view of B in fig. 3.
Fig. 5 is a view showing one of the structural parts of the locking device of the present invention.
FIG. 6 is a second structural part of the locking device of the present invention.
Fig. 7 is a schematic diagram of the folding process of the present invention when changing from the unfolded state to the folded state.
FIG. 8 is a second schematic view of the folding process of the present invention when changing from the unfolded state to the folded state.
Fig. 9 is a schematic view of the completion of folding of the present invention when changing from the unfolded state to the folded state.
Fig. 10 is a side view of the present invention shown in a folded-up configuration when transitioning from an unfolded configuration to a folded configuration.
FIG. 11 is a schematic view of the present invention attached to a child car frame.
[ Detailed description ] of the invention
Embodiments of the present invention will be described in detail below with reference to fig. 1-11.
As shown in fig. 1 to 11, the foldable seat frame for the baby carrier of the present invention can be changed from an unfolded state to a folded state after the locking device 100 is unlocked, and comprises a seat main body 1 which can be connected to a baby carrier, 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 is connected with a handle bar 3, wherein the lower support linkage mechanism comprises a support bar 2, a grab bar 4 and a support connecting rod 5, the lower side of the support bar 2 is rotatably connected with the front side of the seat main body 1, the upper end of the support bar 2 is rotatably connected with the lower end of the handle bar 3 around a fifth axis A5, the grab bar 4 is rotatably connected with the support bar 2 around the first axis A1, 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 and unfolds or folds relative to the support rod 2 is arranged between the handle rod 3 and the grab rail 4. When the folding seat is folded, the locking device is unlocked, the handle rod is operated to turn forwards and downwards by using the fifth axis, and meanwhile, the handle rod drives the supporting rod to rotate downwards by taking the connecting shaft at the front side of the seat main body and the lower side of the supporting rod as the rotating shaft, namely, the supporting rod is closed towards one side of the seat main body, and the handle rod is closed towards one side of the supporting rod and is closed towards one side of the seat main body. Meanwhile, the front part of the grab bar is driven to rotate downwards by the aid of the handle bar matched with the transmission mechanism by taking the first axis as a rotating shaft, namely the front part of the grab bar is close to the lower end of the supporting rod, and meanwhile, the rear end of the grab bar is matched with the supporting connecting rod to rotate downwards by taking the connecting shafts on the lower side of the supporting connecting rod and the rear side of the seat as rotating shafts, namely the grab bar and the supporting connecting rod are 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 turn upwards and backwards by taking the fifth axis as the rotating shaft until the handle rod is in an unfolded state relative to the support rod. Meanwhile, the handle rod drives the supporting rod to rotate upwards by taking the connecting shafts at the front side of the seat main body and the lower side of the supporting rod as rotating shafts, namely the supporting rod turns over to the side far away from the seat main 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 grab bar to rotate upwards by taking the first axis as a rotating shaft, and the rear end of the grab bar pulls the supporting connecting rod to rotate upwards and forwards by taking the connecting shaft at the lower side of the supporting connecting rod and the rear side of the seat as the rotating shaft, so that the integral unfolding of the seat frame is realized.
As shown in fig. 1-3 and 7-10, the transmission mechanism comprises a transmission rod 6, the lower end of the transmission rod 6 is rotatably connected with the grab handle 4 around a third axis A3, and the upper end of the transmission rod 6 is rotatably connected with the handle 3 and is close to the lower end of the handle 3 around a fourth axis A4. The lower support linkage mechanism is locked by arranging the transmission rod between the grab bar and the grab bar, and when the grab bar rotates and expands relative to the support rod, namely, when the grab bar and the support rod are positioned on the same axis, a triangle structure is formed among the first axis, the third axis and the fourth axis, and when the grab bar rotates and folds relative to the support rod, namely, when the grab bar and the support 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 the design requirement, a U-shaped handrail front rod 41 is disposed 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.
As shown in fig. 1-2, in order to make the infant more comfortable and safe to sit on, the front end of the seat main body 1 is rotatably connected with a front lever 7 for supporting the legs of the child.
As shown in fig. 1-2, in order to make the infant more comfortable and safe to sit on, a backrest assembly 8 for supporting the back of the child is rotatably coupled to the rear end of the seat main body 1.
As shown in fig. 1-4, the backrest assembly comprises two backrest connecting rods 81 rotatably connected with the rear end of the seat main body 1, a backrest rod 82 in a U shape 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, the other end of the backrest rod 82 is rotatably connected with the other backrest connecting rod 81, and a locking structure 83 which can enable the backrest rod 82 to be locked relatively when the backrest rod 82 is rotatably unfolded relative to the backrest connecting rod 81 is arranged between the backrest rod 82 and the backrest connecting rod 81. When folding up, the backrest rod 82 is operated to turn forward upwards with 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, then the backrest connecting rod 81 is operated to drive the backrest rod 82 to turn forward upwards with the connection axis between the backrest connecting rod 81 and the seat main body 1, so that the backrest rod 82 and the backrest connecting rod are close to one side of the seat main body, and after folding up is completed, the whole volume of the seat frame is small, and transportation and taking are convenient.
As shown in fig. 4, the latch structure 83 includes a locking notch 831 provided at a lower end of the backrest rod 82, the backrest rod 81 is provided with a locking protrusion 832 capable of being engaged with the locking notch 831 when the backrest rod 82 rotates and expands relative to the backrest rod 81, a spring is provided between the locking protrusion 832 and the backrest rod 81, which enables the locking protrusion 832 to be engaged with the locking notch 831 when the backrest rod 82 rotates and expands relative to the backrest rod 81, and when the backrest rod 82 expands, the backrest rod 82 and the backrest rod 81 can be stably connected, the backrest rod 82 is prevented from rotating relative to the backrest rod 81, and misoperation is prevented, and the safety is high.
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 an unlocking structure 200 capable of unlocking the locking device 100 is disposed on the handle rod 3.
As shown in fig. 5 and 6, the locking device 100 includes a left housing 110 disposed at the lower end of the handle 3 and a right housing 120 disposed at the upper end of the support rod 2 and capable of rotating relative to the left housing 110, the left housing 110 and the right housing 120 enclose 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 beveled protrusions 131 are disposed on the rotating block 130 in a circumferential array, a plurality of inclined grooves 141 capable of being engaged with the beveled protrusions 131 and capable of driving the spline 140 to move laterally when the rotating block 130 rotates are disposed on the spline 140, a clamping groove 150 capable of simultaneously clamping with the spline 140 is disposed on the left housing 110 and the right housing 120, a spring 160 for resetting 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 to rotate is disposed in the handle 3. The unlocking structure 200 is an unlocking part which is arranged on the handle bar 3 and can be connected with the rotating block 130 through the pull rope 170.
During unlocking, a user operates the unlocking part to drive the rotating block 130 to rotate through the pull rope 170, so that the inclined protrusions 131 on the rotating block 130 are matched with the inclined grooves 141 on the spline 140 in a guiding mode, the spline 140 is enabled to move transversely to one side of the right shell 120 in the cavity, namely, the spline 140 is enabled to be separated from the clamping groove 150 of the left shell 110, the spring 160 is compressed, the right shell 120 can rotate relative to the left shell 110 at the moment, unlocking of the locking device 100 is achieved, and unlocking of the handle bar and the support bar is achieved.
As shown in fig. 5 and 6, a locking structure 300 is provided between the left housing 110 and the right housing 120, which locks the handle bar 3 and the support bar 2 after being folded by rotating the handle bar relative to the support bar 2, and the locking structure 300 locks the support bar and the handle bar relative to each other after being folded, thereby preventing the handle bar from being unfolded relative to the support bar after being folded, and facilitating transportation, storage and taking.
As shown in fig. 5 and 6, the locking structure 300 includes a locking slot 310 provided on the right housing 120, the left housing 110 is provided with a locking block 320 that can be locked into the locking slot 310 to lock the left housing 110 and the right housing 120 to each other when the handle 3 is folded with respect to the support rod 2, and a return spring, not shown, is provided between the locking block 320 and the left housing 110 to return the locking block 320. After the folding, the locking clamping block 320 is aligned with the locking clamping groove 310, the return spring drives the locking clamping block 320 to be clamped into the locking clamping groove 310, namely, the left shell 110 and the right shell 120 are mutually locked, and when the handle rod is unfolded relative to the support rod, the side wall of the locking clamping block 320 is matched with the side wall of the locking clamping groove 310 in a guiding manner to form an arc surface, so that the side wall of the locking clamping block 320 is matched with the side wall of the locking clamping groove 310 to compress the return spring, and the locking clamping block 320 is separated from the locking clamping groove 310, namely, the unlocking of the left shell 110 and the right shell 120 is realized.

Claims (6)

1. The foldable seat frame for the baby carrier is capable of being 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) capable of being connected to a baby carrier, 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), a handle bar (3) is connected to the lower support linkage mechanism, and the lower support linkage mechanism comprises:
The lower side of the supporting rod (2) is rotationally connected with the front side of the seat main body (1), and the upper end of the supporting rod (2) is rotationally connected with the lower end of the handle rod (3) around a fifth axis (A5);
the grab rail (4), the grab rail (4) is connected with the support rod (2) in a rotating way around the first axis (A1);
the lower side of the supporting connecting rod (5) is rotationally connected with the rear side of the seat main body (1), and the upper end of the supporting connecting rod (5) is rotationally connected with the rear end of the grab rail (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);
A 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);
The back support comprises a seat main body (1), a back support assembly (8) used for supporting the back of a child, and a locking structure (83) which is arranged between the back support assembly and the back support connecting rod (81) and can enable the back support connecting rod (82) to be locked relatively when the back support connecting rod (81) rotates and expands relatively, wherein the back support connecting rod (81) is rotatably connected with the back end of the seat main body (1), a U-shaped back support rod (82) is arranged between the back support connecting rod (81) and the back support connecting rod (82), one end of the back support rod (82) is rotatably connected with one back support connecting rod (81), and the other end of the back support rod (82) is rotatably connected with the other back support connecting rod (81);
The locking device (100) is arranged between the supporting rod (2) and the handle rod (3), and an unlocking structure (200) capable of unlocking the locking device (100) is arranged on the handle rod (3).
2. A collapsible seat frame for a pram according to claim 1, wherein the transmission mechanism comprises 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) around a fourth axis (A4) near the lower end of the handle bar (3).
3. A collapsible seat frame for a pram according to claim 1, characterized in that the front end of the seat body (1) is rotatably connected with a front bar (7) for supporting the legs of a child.
4. A foldable seat frame for a baby carrier according to any one of claims 1-3, characterized in that the latch structure (83) comprises a locking recess (831) provided with a lower end of the backrest rod (82), the backrest rod (81) is provided with a locking projection (832) capable of being snapped into the locking recess (831) when the backrest rod (82) is rotated and unfolded relative to the backrest rod (81), and a spring is provided between the locking projection (832) and the backrest rod (81) for enabling the locking projection (832) to remain snapped into the locking recess (831) when the backrest rod (82) is rotated and unfolded relative to the backrest rod (81).
5. A collapsible seat frame for a stroller according to any one of claims 1-3, characterized in that the locking device (100) comprises a left housing (110) arranged at the lower end of the handle bar (3) and a right housing (120) arranged at the upper end of the supporting bar (2) and capable of rotating relative to the left housing (110), the left housing (110) and the right housing (120) enclose a cavity, a rotating block (130) capable of rotating in the cavity and a spline (140) capable of transversely moving in the cavity are arranged in the cavity, a plurality of oblique protrusions (131) with inclined surfaces are arranged on the rotating block (130) in a circumferential array, a plurality of inclined grooves (141) capable of being matched with the oblique protrusions (131) and capable of driving the spline (140) to transversely move when the rotating block (130) rotates are arranged on the left housing (110) and the right housing (120), a clamping groove (150) capable of simultaneously clamping with the spline (140) is arranged on the left housing (110) and the right housing (120), a spring (160) capable of resetting the spline (140) is arranged between the spline (140) and the right housing (120), and the rotating bar (3) is provided with a pull rope (170) for pulling the rotating.
6. The foldable seat frame for a baby carrier according to claim 5, wherein a locking structure (300) is provided between the left housing (110) and the right housing (120) to lock the handle bar (3) to each other after being pivoted and folded with respect to the support bar (2).
CN202110457303.6A 2021-04-27 2021-04-27 Foldable seat frame for baby carriage Active CN113147879B (en)

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CN113147879B true CN113147879B (en) 2025-03-04

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Publication number Priority date Publication date Assignee Title
CN116279744A (en) 2019-06-28 2023-06-23 明门瑞士股份有限公司 Infant carrier and backrest adjusting mechanism thereof

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