WO2021258601A1 - 行李箱式折叠儿童推车 - Google Patents

行李箱式折叠儿童推车 Download PDF

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Publication number
WO2021258601A1
WO2021258601A1 PCT/CN2020/126373 CN2020126373W WO2021258601A1 WO 2021258601 A1 WO2021258601 A1 WO 2021258601A1 CN 2020126373 W CN2020126373 W CN 2020126373W WO 2021258601 A1 WO2021258601 A1 WO 2021258601A1
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WO
WIPO (PCT)
Prior art keywords
front wheel
folding
bottom frame
rod
top shell
Prior art date
Application number
PCT/CN2020/126373
Other languages
English (en)
French (fr)
Inventor
奉定勇
Original Assignee
郑州贝欧科安全科技股份有限公司
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Publication of WO2021258601A1 publication Critical patent/WO2021258601A1/zh

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Classifications

    • 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
    • B62B7/08—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis
    • B62B7/086—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis becoming smaller in all three dimensions
    • 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
    • B62B7/10—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable by folding down the body to the wheel carriage or by retracting projecting parts into the box-shaped body
    • 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
    • B62B9/20—Handle bars; Handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/04—Hand-propelled vehicles or sledges being foldable or dismountable when not in use box-shaped in folded position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/12—Collapsible wheels

Definitions

  • the invention belongs to the field of child strollers, and in particular relates to a luggage box type folding child stroller.
  • Existing child strollers usually include a stroller frame with an unfolded position and a folded position, a seat mechanism on the stroller frame and a complete vehicle lock for locking the stroller frame and the unfolded position Dead mechanism, front wheel assembly, rear wheel assembly and other structures.
  • Most of the existing strollers fold the stroller frame, and do not have a structure for folding the front wheel assembly and the rear wheel assembly, so the structure of the child stroller after folding is still not compact enough.
  • Patent CN110816633A discloses a child stroller, which includes a bottom frame, on which front wheels and rear wheels are arranged, and a lower folding rod is hinged on the end of the bottom frame close to the front wheel.
  • the front wheel and the rear wheel expand and contract and rotate 90 degrees to the flat position at the same time, that is, the front wheel and the rear wheel are folded at the same time, so that after folding, the folding The car occupies less space, but this structure also has certain problems. After folding, the front and rear wheels can no longer roll. Moving the folding bike needs to lift the entire baby carriage, which is labor intensive.
  • the invention provides a luggage box type foldable child stroller which forms the shape of a luggage box after being folded.
  • a luggage-style folding stroller includes a bottom frame, the bottom frame includes two side sides of the bottom frame; The front wheel end of the side of the frame is hinged to the lower folding rod.
  • the lower folding rod and the side of the base frame are connected by a connecting rod.
  • the sliding sliding block between the sides of the base frame constitutes a crank slider mechanism.
  • the upper end of the lower folding rod is hinged.
  • the upper folding rod, the lower folding rod extend the seat board forward, the seat board and the upper folding board are connected by a second link; the lower folding rod, the upper folding rod, the second connecting rod, and the seat board are connected in sequence Four-bar linkage.
  • the front wheel is connected to the front wheel bracket, and the front wheel bracket is rotatably connected with the folding slider; either one of the side of the chassis and the front wheel bracket is provided with a spiral guide groove, the other is provided with a short guide rod, and the short guide rod is set in the spiral guide groove,
  • the forward and backward movement of the folding slider drives the front wheel bracket to move and rotate.
  • the bottom shell of the box is set on the bottom frame, and the top shell of the box is set on the upper folding rod. After the stroller is folded, the bottom shell and the top shell are aligned to form a luggage-shaped outer shell; the bottom side of the bottom shell is set to accommodate the folded front The front wheel accommodating groove of the wheel.
  • the top shell includes a top shell frame and a top shell plate.
  • the top shell frame is fixed with the upper folding rod.
  • the top shell plate and the top shell frame are connected by a soft cloth to open and close the upper part of the top shell plate.
  • the bottom of the top shell plate and the top shell The frame or the seat plate or the upper folding rod is hinged.
  • the four-bar linkage is at the dead center position.
  • a spring block is provided on the side of the bottom frame, and a locking hole for accommodating the spring block is provided on the folding slider.
  • the spring block is locked after entering the lock hole; press the spring block to unlock; the spring block is set on the side close to the rear wheel On the inclined surface, when the folding slider moves in the direction of the front wheel, press the elastic block downward to retract the elastic block.
  • the locking hole corresponds to the elastic block, the elastic block pops out to lock the folding slider.
  • the front wheel support is located on the inner side of the side of the underframe, and the folding slider is connected to the side of the underframe in sliding movement and is also rotatably connected to the front wheel support.
  • a front wheel support groove is provided on the side of the underframe at one end of the front wheel.
  • the beneficial effect of the present invention is that: the front end of the front wheel bracket is provided with a front wheel, the front wheel bracket moves and rotates along the axis of the moving direction, and the front wheel also moves and rotates to realize two states of extension and folding.
  • the front wheel is stowed in the non-working state, but the rear wheel is still extended and rolled.
  • the folded stroller saves the occupied space and can be moved easily.
  • the bottom shell of the box is set on the bottom frame, and the top shell of the box is set on the upper folding rod.
  • the front wheel folds into the front wheel receiving groove of the bottom shell, and the rear wheel can roll on the ground;
  • the bottom shell and The top shell is aligned to form an outer shell in the shape of a suitcase.
  • the push rod can be extended and retracted. Pulling the push rod can pull the stroller like a suitcase.
  • the bottom shell and the top shell play a role in protecting the stroller.
  • the four-bar linkage mechanism is used to fold the frame, and the dead center position is used for self-locking, and the structure is simple. low cost.
  • a locking mechanism is arranged between the folding slider and the side of the base frame, so that when the lower folding lever is in the unfolded state, the folding slider and the side of the base frame are locked.
  • An elastic block is arranged on the side of the bottom frame, and a locking hole for accommodating the elastic block is arranged on the folding sliding block, and the elastic block is locked after entering the locking hole; press the elastic block to unlock.
  • the locking structure is simple.
  • Figure 1 is an overall schematic diagram of the stroller.
  • Figure 2 is a bottom view of the stroller.
  • Figure 3 is a schematic diagram of the hidden top of the stroller.
  • FIG. 4 is a schematic diagram of the chassis.
  • Figure 5 is a schematic diagram of the cooperation between the spiral guide groove and the short guide rod on the base frame.
  • Figure 6 is a schematic diagram of the front wheel and the front wheel bracket.
  • Figure 7 is a schematic diagram of the side of the chassis.
  • Figure 8 is a schematic diagram of the fit between the elastic block and the locking hole.
  • Figure 9 is a schematic diagram of the connection between the top shell plate and the top shell frame.
  • Fig. 10 is an enlarged schematic diagram of the connection of the four-bar linkage (an embodiment in which the four-bar linkage is locked with a positioning pin).
  • Fig. 11 is a schematic diagram of the folded state of the luggage-type child stroller.
  • Fig. 12 is a view from another direction of Fig. 11.
  • 1 is the front wheel
  • 2 is the side of the underframe
  • 3 is the rear wheel
  • 4 is the lower folding rod
  • 5 is the connecting rod
  • 6 is the folding slider
  • 7 is the front wheel bracket
  • 8 is the spiral guide groove
  • 9 is the Short guide rod
  • 11 is the front wheel support groove
  • 12 is the straight groove
  • 13 is the upper folding rod
  • 14 is the seat plate
  • 15 is the second link
  • 16 is the elastic block
  • 17 is the locking hole
  • 18 is the push rod
  • 19 is the footrest
  • 20 is the bottom shell
  • 21 is the top shell frame
  • 22 is the top shell plate
  • 23 is the front wheel receiving groove
  • 24 is the rotation axis hole
  • 25 is the armrest
  • 26 is the positioning pin hole
  • 27 is the hinge axis hole .
  • a front wheel folding structure of a child stroller includes a bottom frame, the bottom frame includes two bottom frame sides 2; the two ends of the bottom frame side 2 are respectively provided with a front wheel 1 and a rear wheel 3.
  • the front wheel 1 end of the side frame of the underframe 2 is hinged to a lower folding rod 4, and the lower folding rod 4 and the side edge of the underframe 2 are connected by a connecting rod 5 to a folding slider 6 that slides between the sides of the underframe 2. It constitutes a crank slider mechanism.
  • the front wheel 1 is connected to the front wheel support 7, and the front wheel support 7 is rotatably connected to the folding slider 6.
  • Either one of the bottom frame side 2 and the front wheel support 7 is provided with a spiral guide groove 8, and the other is provided with a short guide rod 9, short guide
  • the rod 9 is arranged in the spiral guide groove 8, and the forward and backward movement of the folding slider 6 drives the front wheel support 7 to move and rotate.
  • the length direction of the short guide rod 9 is not parallel to the moving direction of the folding slider.
  • the length direction of the short guide rod 9 is perpendicular to the length direction of the side plate 2 of the underframe or the front wheel bracket 7.
  • a front wheel 1 is provided at the front end of the front wheel support 7, and the front wheel support 7 moves and rotates along the axis of its moving direction.
  • the front wheel 1 also moves and rotates to achieve two states of extension and folding.
  • the front wheel 1 is stowed in a non-working state, but the rear wheel is still extended and rolled.
  • the folded stroller can be dragged like a suitcase, which saves occupied space and can be moved conveniently.
  • the front wheel support 7 is located on the inner side of the side 2 of the base frame, and the folding slider 6 is slidably connected to the side 2 of the base frame and is also rotatably connected to the front wheel support 7.
  • the bottom frame side plate 2 is not a separate rod, but includes the front wheel bracket and the rear wheel bracket; the front wheel bracket and the rear wheel bracket telescopically slide between the front wheel bracket and the rear wheel bracket, and the bottom frame side plate in this patent 2 can be a support rod between the front wheel 1 and the rear wheel 3, not telescopic, and does not include the front wheel bracket 7.
  • the front wheel bracket 7 is arranged on the outside of the side plate of the underframe, so that the structure of the stroller is more stable.
  • the spiral guide groove 8 is arranged on the cylindrical side wall or part of the cylindrical side wall on the side 2 of the underframe or the front wheel support 7 as required.
  • the rotation angle of the spiral guide groove is preferably 90 degrees. By rotating the spiral guide groove section by 90 degrees, the front wheel 1 can be converted between upright and flat, and the folded structure of the stroller is more compact.
  • the spiral guide groove 8 is made of nylon material. In this way, the short guide rod 9 will not generate noise during the movement of the spiral guide groove 8.
  • the spiral guide groove 8 is preferably made of a material with self-lubricating properties, such as polytetrafluoroethylene material.
  • a front wheel support groove 11 is provided at one end of the underframe side 2 located at the front wheel 1.
  • the front end of the front wheel support 7 enters the front wheel support groove 11.
  • the front wheel 1 directly or indirectly contacts the front wheel support groove 11, and its force is supported by the front wheel support groove 11.
  • the stroller bears better force and is not easily damaged.
  • the underframe side 2 itself is the support rod between the front wheel 1 and the rear wheel 3, and the length does not change.
  • the spiral guide groove 8 is fixed to the side of the underframe 2.
  • the front wheel bracket 7 is provided with a short guide rod 9 which is set in the spiral guide groove 8.
  • the forward and backward movement of the folding slider 6 drives the short guide rod 9 to be guided in the spiral.
  • the spiral guide groove 8 on the side 2 of the chassis is provided with a straight groove 12 toward one end of the front wheel 1, and the length of the straight groove 12 corresponds to the depth of the front wheel support groove 11. Because the front wheel 1 cannot rotate during the process of entering or exiting the front wheel support groove 11, there must be a corresponding straight groove 12 section.
  • a short guide rod 9 is fixed, a spiral guide groove 8 is provided on the front wheel bracket 7, and the short guide rod 9 is arranged in the spiral guide groove 8.
  • the forward and backward movement of the folding slider 6 makes the spiral guide groove 8
  • the front wheel bracket 7 rotates while moving back and forth, the spiral guide groove 8 on the front wheel bracket 7 is provided with a straight groove 12 at one end away from the front wheel 1.
  • the length of the straight groove 12 is the same as that of the front wheel support groove 11. Depth correspondence.
  • the frame folding mechanism of the stroller includes a bottom frame, and the bottom frame includes two bottom frame sides 2; the two ends of the bottom frame side 2 are provided with front wheels 1 and rear wheels 3, respectively.
  • the front wheel 1 end of the side of the underframe 2 is hinged to a lower folding lever 4, and the lower folding lever 4 and the side of the underframe 2 are connected by a connecting rod 5 to a folding slider 6 that slides between the sides of the underframe 2 to form a crank Slider mechanism.
  • the upper end of the lower folding rod 4 is hinged to the upper folding rod 13, and the lower folding rod 4 extends forward from the seat plate 14.
  • the seat plate 14 and the upper folding plate 13 are connected by a second connecting rod 15; the lower folding rod 4 and the upper folding rod 13 , The second link 15 and the seat plate 14 are connected in sequence to form a four-link mechanism.
  • the frame of the stroller includes two symmetrically arranged four-bar linkages, and the two four-bar linkages share a seat plate 14.
  • the four-bar linkage is at the dead center position.
  • the upper folding rod 13 and the lower folding rod 4 are located on a straight line.
  • the position and length of the four-bar linkage mechanism need to meet the conditions of the dead center position, and when the dead center state is satisfied, the upper folding rod 13 and the lower folding rod 4 are located on a straight line.
  • the hinge point of the upper folding rod 13 and the lower folding rod 4 may be located on the side slightly forward of the straight line formed by the upper folding rod 13 and the lower folding rod 4 for easy installation.
  • the front here is the side facing the seat panel 14.
  • the four-bar linkage mechanism is used to fold the frame, and the dead center position is used for self-locking, no special locking mechanism is needed, and the structure is simple. low cost.
  • a locking mechanism is provided between the folding slider 6 and the side edge 2 of the base frame, so that when the lower folding lever 4 is in the unfolded state, the folding slider 6 and the side edge 2 of the base frame are locked.
  • the following structure may also be adopted, that is, a spring block 16 is provided on the side 2 of the base frame, and a locking hole 17 for accommodating the spring block 16 is provided on the folding slider 6, and the locking hole 17 corresponds to the shape of the spring block.
  • the elastic block 16 enters the locking hole 17 and is locked; press the elastic block 16 to unlock it.
  • the elastic block 16 is arranged on the side 2 of the base frame, and elastic members such as springs can be arranged between the side edges 2 of the other base frame so that the elastic block 16 can be compressed.
  • the bullet 16 can also adopt other commonly used structures to satisfy functions.
  • the elastic block 16 is provided with a slope on one side close to the rear wheel 3.
  • the elastic block 16 is pressed downward to retract the elastic block 16, and the locking hole 17 corresponds to the elastic block 16.
  • the elastic block 16 pops out to lock the folding slider.
  • the side of the slope close to the rear wheel 3 is low, and the side close to the front wheel 1 is high.
  • the side of the elastic block 16 close to the front wheel 1 cannot be set in an inclined plane, so that it has a locking function.
  • a telescopic push rod 18 is connected to the upper part of the upper folding rod 13.
  • telescopic structures of the telescopic push rod 18, and the structures commonly used in the prior art can be adopted.
  • An extended armrest is provided between the two second connecting rods 15.
  • the two sides of the armrest 25 are respectively arranged on the second connecting rod 15 on the same side.
  • the front end of the seat board 14 is rotated to provide a footrest 19.
  • the footrest 19 can be folded or unfolded by turning.
  • the principle and structure of the folding of the foot rest 19 can be referred to the existing patent documents, and the detailed description will not be omitted.
  • the four-bar linkage mechanism may also be provided with a four-bar linkage locking device other than the dead-point locking mechanism.
  • the four-bar linkage locking device here can refer to the common four-bar linkage locking device in the prior art.
  • the four-link locking device includes a positioning pin that simultaneously penetrates the upper folding rod 13 and the lower folding rod 4 in the unfolded state of the stroller.
  • the upper folding rod 13 and the lower folding rod 4 are provided with positioning pin holes 26 at positions corresponding to the positioning pins.
  • the hinge point of the upper folding lever 13 and the lower folding lever 4 is provided with a hinge shaft hole 27.
  • the positioning pin and the hinge shaft passing through the upper folding lever 13 and the lower folding lever 4 together lock the upper folding lever 13 and the lower folding lever 4 in position. . When you need to fold the stroller, just take out the positioning pins.
  • the box structure of the folding baby stroller includes a bottom frame, which includes two bottom frame sides 2; the bottom frame is hinged with a lower folding rod 4, and the upper end of the lower folding rod 4 is hinged with an upper folding rod. 13.
  • the bottom shell 20 of the box body is arranged on the bottom frame, and the top shell of the box body is arranged on the upper folding rod 13.
  • the bottom shell 20 and the top shell are aligned to form a luggage-shaped outer shell.
  • the bottom shell 20 and the top shell can protect the folding stroller to a certain extent, and the appearance is more beautiful. With the push rod and wheels, you can pull the push rod to drag the folded stroller like a suitcase.
  • the top shell itself can also be used as the backrest of the stroller.
  • the top case includes a top case frame 21 and a top case plate 22.
  • the two sides of the top case frame 21 are respectively fixed to the upper folding rods 13 on the same side.
  • the fixing method may be bolt connection or connection with intermediate connectors.
  • the top shell plate 22 and the top shell frame 21 are openable and closable.
  • the top shell 22 and the top shell frame 21 are connected by a soft cloth so that the upper part of the top shell 22 is opened and closed, and the lower end is not opened and closed.
  • the top shell 22 can be rotated backward to a proper position.
  • the non-opening and closing of the lower end of the top shell 22 means that the bottom of the top shell 22 is hinged with the top shell frame 21 or the seat panel 14 or the upper folding rod 13.
  • the shape of the top shell frame 21 is roughly an inverted U shape.
  • the two sides and upper ends of the top shell plate 22 are connected to the top shell frame 21 through a soft cloth; the soft cloth and the top shell plate 22 form a cloth pocket that allows the back to lie down.
  • the two sides of the bottom of the top shell plate 22 are respectively provided with rotating shaft holes 24, the corresponding position on the top shell frame 21 is also provided with a rotating shaft hole 24, and the rotating shaft hole 24 on the same side is provided with a rotating shaft, thereby
  • the top shell plate 22 is hinged to the top shell frame 21.
  • the bottom side of the bottom shell 20 is provided with a front wheel accommodating groove 23 for accommodating the folded front wheel 1.
  • the front wheel accommodating groove 23 is located on the side of the bottom shell 20 close to the front wheel 1, and its specific position corresponds to the position of the front wheel 1 after folding; its depth corresponds to the height of the front wheel 1 after being folded or slightly larger than that of the front wheel 1 after being folded.
  • the height of the front wheel accommodating groove 23 is close to the front wheel and the side profile of the front wheel corresponds to the movement track of the front wheel 1.
  • the bottom shell 20 and the bottom of the front wheel 1 are basically on the same plane, which is convenient to place and move, and is more beautiful.
  • the folding structure of the front wheel 1 has been described in detail in the foregoing, and will not be described in detail.
  • the upper end of the upper folding rod 13 is connected with a telescopic push rod 18.
  • the front wheel 1 is folded into the front wheel receiving groove 23 of the bottom shell 20, and the rear wheel 3 can roll on the ground; the bottom shell 20 and the top shell form the shape of a suitcase, and the push rod 18 can be extended and pushed by pulling.
  • the rod can pull the stroller like a suitcase.
  • the bottom shell 20 and the top shell play a role in protecting the stroller.
  • the front wheel 1 is connected to the front wheel support 7, and the front wheel support 7 is rotatably connected to the folding slider 6; either one of the side of the chassis 2 and the front wheel support 7 is provided with a spiral guide groove 8, and the other is provided with a short guide rod 9.
  • the short guide rod 9 is arranged in the spiral guide groove 8, and the forward and backward movement of the folding slider 6 drives the front wheel support 7 to move and rotate.
  • a bottom shell 20 of the box body is arranged on the bottom frame, and a top shell of the box body is arranged on the upper folding rod 13. After the stroller is folded, the bottom shell 20 and the top shell are aligned to form a luggage-shaped outer shell.
  • the bottom side of the bottom shell 20 is provided with a front wheel accommodating groove 23 for accommodating the folded front wheel 1.
  • the upper end of the upper folding rod 13 is connected with a telescopic push rod 18.
  • the short guide rod 9 passes through the straight groove 12 and the spiral guide groove 8 so that the front wheel bracket 7 and the front wheel 1 move the length of the straight groove 12 in the direction of the rear wheel 3, and then continue to move linearly and rotate the front wheel in the bottom shell 20 In the accommodating groove 23, the front wheel 1 rotates 80 degrees and lays in the front wheel accommodating groove 23 at this time.
  • the top shell and the bottom shell constitute the shape of the luggage case. Pulling the push rod 18, the rear wheels of the folding trolley roll on the ground to drive the folding trolley to walk. When you need to unfold, turn the lower folding lever 4 upward, and the folding slider 6 moves along the side 2 of the chassis to the direction of the front wheel 1.
  • the elastic block 16 When it moves to the inclined surface of the elastic block 16, the elastic block 16 is automatically compressed due to the inclined surface structure to make the elastic block When the 16 retracts and the locking hole 17 corresponds to the elastic block 16, the elastic block 16 pops out to lock the folding slider. Then turn the upper folding lever 13 backwards until the four-bar linkage reaches the locked state.

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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

一种折叠后构成行李箱形状的行李箱式折叠儿童推车，包括底架、底架包括两个底架侧边（2）；底架侧边（2）两端附近位置分别设置前轮（1）和后轮（3），底架侧边（2）的前轮（1）端铰接下折叠杆（4），下折叠杆（4）与底架侧边（2）之间，由连杆（5）连接在底架侧边（2）之间滑动的折叠滑块（6），构成曲柄滑块机构，前轮（1）连接前轮支架（7），前轮支架（7）与折叠滑块（6）转动连接；底架侧边（2）和前轮支架（7）其中任一设置螺旋导向槽（8）、另一个设置短导向杆（9），短导向杆（9）设置在螺旋导向槽（8）内，折叠滑块（6）的前后移动带动前轮支架（7）移动并转动。底架上设置箱体的底壳（20），上折叠杆（13）上设置箱体的顶壳，儿童推车折叠后，底壳（20）和顶壳对齐构成行李箱形状的外壳；底壳（20）底部一侧设置容纳折叠后前轮（1）的前轮容纳槽（23）。

Description

行李箱式折叠儿童推车 技术领域
本发明属于儿童推车领域，具体涉及一种行李箱式折叠儿童推车。
背景技术
现有的儿童推车，通常包括具有展开位置和折叠位置的推车车架，设置推车车架上的座位机构以及用于将所述推车车架锁死与展开位置下的整车锁死机构、前轮组件、后轮组件等结构。现有的推车多数是将推车车架折叠，并没有折叠前轮组件和后轮组件的结构，这样折叠后儿童推车的结构仍然不够紧凑。
专利CN110816633A公开了一种儿童推车，包括底架，底架上设置前轮以及后轮，靠近底架上靠近前轮的一端铰接下折叠杆。在儿童车折叠的过程中，下折叠杆向下转动的同时，前轮和后轮之间伸缩并且同时转动90度到平放的位置，即前轮和后轮同时折叠，这样折叠后，折叠车所占的空间更小，但是这种结构也存在一定的问题。折叠后前轮和后轮不能再滚动，移动折叠车需要提起整个儿童车，比较耗力。
另外，现有的推车车架折叠结构有多种，但是很多结构比较复杂，占用较多空间。需要新的推车车架折叠结构丰富市场种类。而且，现有的儿童推车只有杆状结构、没有除了座位板之外的壳体，折叠后形状杂乱，不容易放置或者与其他部件一同放置，凸出的杆状结构没有保护，受力过大有损伤自身的可能。
发明内容
本发明提供一种折叠后构成行李箱形状的行李箱式折叠儿童推车。
本发明的目的是以下述方式实现的：行李箱式折叠儿童推车，包括底架、底架包括两个底架侧边；底架侧边两端附近位置分别设置前轮和后轮，底架侧边的前轮端铰接下折叠杆，下折叠杆与底架侧边之间由连杆连接在底架侧边之间滑动的折叠滑块，构成曲柄滑块机构，下折叠杆上端铰接上折叠杆，下折叠杆向前伸出座位板，座位板与上折叠板之间通过第二连杆连接；下折叠杆、上折叠杆、第二连杆、座位板之间顺次连接构成四连杆机构。
前轮连接前轮支架，前轮支架与折叠滑块转动连接；底架侧边和前轮支架其中任一设置螺旋导向槽、另一个设置短导向杆，短导向杆设置在螺旋导向槽内，折叠滑块的前后移动带动前轮支架移动并转动。
底架上设置箱体的底壳，上折叠杆上设置箱体的顶壳，儿童推车折叠后，底壳和顶壳对齐构成行李箱形状的外壳；底壳底部一侧设置容纳折叠后前轮的前轮容纳槽。
顶壳包括顶壳框和顶壳板，顶壳框与上折叠杆固定，顶壳板和顶壳框之间由软布连接使顶壳板的上部开合，顶壳板的底部与顶壳框或者座位板或上折叠杆铰接。
儿童推车展开状态下，四连杆机构处于死点位置。
底架侧边上设置弹块，在折叠滑块上设置容纳弹块的锁止孔，弹块进入锁止孔后锁死；按下弹块解锁；所述弹块靠近后轮的一侧设置斜面，折叠滑块向前轮方向移动的过程中，向下压弹块使弹块缩回，锁止孔与弹块对应时，弹块弹出锁死折叠滑块。
前轮支架位于底架侧边的内侧，折叠滑块既与底架侧边滑动连接，又与前轮支架转动连接。
底架侧边位于前轮的一端设置前轮支撑槽，儿童推车展开状态时，前轮支架的前端进入前轮支撑槽内。
本发明的有益效果是：前轮支架的前端设置前轮，前轮支架移动并沿着其移动方向的轴线转动，前轮也移动并转动实现伸出与折叠两种状态。前轮在非工作状态下收起，而后轮却仍然伸出并滚动，折叠后的儿童推车节省了占据的空间又可以方便移动。
底架上设置箱体的底壳，上折叠杆上设置箱体的顶壳，儿童推车折叠后，前轮折叠进入底壳的前轮容纳槽，后轮可以在地面上滚动；底壳和顶壳对齐构成行李箱形状的外壳。推杆可以伸缩，拉动推杆，可以像拉动行李箱一样拉动儿童推车。底壳和顶壳起到一定保护儿童推车的作用。
使用四连杆机构折叠车架、利用死点位置自锁，结构简单。成本低。折叠滑块与底架侧边之间设置锁死机构使下折叠杆在展开状态时，折叠滑块与底架侧边之间锁死。底架侧边上设置弹块，在折叠滑块上设置容纳弹块的锁止孔，弹块进入锁止孔后锁死；按下弹块解锁。锁死结构简单。
附图说明
图1是儿童推车整体示意图。
图2是儿童推车底部视图。
图3是儿童推车隐藏顶部示意图。
图4是底架示意图。
图5是底架上螺旋导向槽和短导向杆配合示意图。
图6是前轮和前轮支架示意图。
图7是底架侧边示意图。
图8是弹块与锁止孔配合示意图。
图9是顶壳板与顶壳框连接处示意图。
图10是四连杆机构连接处放大示意图(使用定位销锁死四连杆机构的实施例)。
图11是行李箱式儿童推车折叠状态示意图。
图12是图11另一个方向视图。
其中，1是前轮、2是底架侧边、3是后轮、4是下折叠杆、5是连杆、6是折叠滑块、7是前轮支架、8是螺旋导向槽、9是短导向杆、11是前轮支撑槽、12是直槽、13是上折叠杆、14是座位板，15是第二连杆、16是弹块、17是锁止孔、18是推杆、19是脚托；20是底壳、21是顶壳框、22是顶壳板、23是前轮容纳槽，24是转动轴孔、25是扶手、26是定位销孔、27是铰接轴孔。
具体实施方式
以下将结合附图以及具体实施例，对本发明的技术方案进行清楚、完整的描述。应当说明的是，本申请中所述的“连接”和用于表达“连接”的词语，如“相连接”、“相连”等，既包括某一部件与另一部件直接连接，也包括某一部件通过其他部件与另一部件相连接。诸如第一、第二等之类的关系术语仅仅用来将一个实体或者操作与另外一个实体或者操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。
如图1-12所示，一种儿童推车的前轮折叠结构，包括底架、底架包括两个底架侧边2；底架侧边2两端位置分别设置前轮1和后轮3，底架侧边2的前轮1端铰接下折叠杆4，下折叠杆4与底架侧边2之间由连杆5连接在底架侧边2之间滑动的折叠滑块6，构成曲柄滑块机构。前轮1连接前轮支架7，前轮支架7与折叠滑块6转动连接；底架侧边2和前轮支架7其中任一设置螺旋导向槽8、另一个设置短导向杆9，短导向杆9设置在螺旋导向槽8内，折叠滑块6的前后移动带动前轮支架7移动并转动。短导向杆9的长度方向与折叠滑块的移动方向不平行、优选短导向杆9的长度方向垂直于底架侧板2或者前轮支架7的长度方向。前轮支架7的前端设置前轮1，前轮支架7移动并沿着其移动方向的轴线转动，前轮1也移动并转动实现伸出与折叠两种状态。前轮1在非工作状态下收起，而后轮却仍然伸出并滚动，折叠后的儿童推车可以像行李箱一样拖动，即节省了占据的空间又可以方便移动。
前轮支架7位于底架侧边2的外部靠内的一侧，折叠滑块6既与底架侧边2滑动连接，又与前轮支架7转动连接。之前的专利如CN110816633A儿童推车中，底架侧板2不是单独的杆件，而包括前轮支架、后轮支架；前轮支架和后轮支架之间伸缩滑动，本专利中底架侧板2可以是前轮1和后轮3之间的支撑杆、不伸缩、也不包括前轮支架7，前轮支架7 设置在底架侧板的外部，这样儿童推车的结构更加的稳固。
螺旋导向槽8根据需要设置在底架侧边2或前轮支架7上的圆筒侧壁或者部分圆筒侧壁上。螺旋导向槽转动角度优选为90度，通过对螺旋导向槽段加工旋转90度，可以使前轮1在直立和平放之间转换，儿童推车折叠后的结构更加紧凑。螺旋导向槽8为尼龙材料制作。这样，短导向杆9在螺旋导向槽8运动过程中不会产生噪音。螺旋导向槽8最好采用带有自润滑性质的材料，比如聚四氟乙烯材料等。
进一步的技术方案中，底架侧边2位于前轮1的一端设置前轮支撑槽11，儿童推车展开状态时，前轮支架7的前端进入前轮支撑槽11内。儿童推车展开时，前轮1直接或者间接接触前轮支撑槽11，其受力由前轮支撑槽11支撑。儿童推车受力更好，不容易损坏。在这种方案中，底架侧边2本身是前轮1和后轮3之间的支撑杆，长度不发生变化。
对于底架侧边2固定螺旋导向槽8，前轮支架7上设置短导向杆9，短导向杆9设置在螺旋导向槽8内，折叠滑块6的前后移动带动短导向杆9在螺旋导向槽8内移动并转动的实施例中，底架侧边2上的螺旋导向槽8向着前轮1的一端设置一段直槽12，直槽12的的长度与前轮支撑槽11的深度对应。因为前轮1在进入或者退出前轮支撑槽11的过程中不能转动，所以必须有对应的直槽12段。
而对于底架侧边2固定短导向杆9，前轮支架7上设置螺旋导向槽8，短导向杆9设置在螺旋导向槽8内，折叠滑块6的前后移动使带有螺旋导向槽8的前轮支架7在前后移动的同时转动的实施例，前轮支架7上的螺旋导向槽8远离前轮1的一端设置一段直槽12，直槽12的的长度与前轮支撑槽11的深度对应。
如图1-12所示，儿童推车的车架折叠机构，包括底架、底架包括两个底架侧边2；底架侧边2两端位置分别设置前轮1和后轮3，底架侧边2的前轮1端铰接下折叠杆4，下折叠杆4与底架侧边2之间由连杆5连接在底架侧边2之间滑动的折叠滑块6，构成曲柄滑块机构。下折叠杆4上端铰接上折叠杆13，下折叠杆4向前伸出座位板14，座位板14与上折叠板13之间通过第二连杆15连接；下折叠杆4、上折叠杆13、第二连杆15、座位板14之间顺次连接构成四连杆机构。儿童推车的车架包括两个对称设置的四连杆机构，两个四连杆机构共用一个座位板14。
儿童推车展开状态下，四连杆机构处于死点位置。车架展开状态下，上折叠杆13和下折叠杆4位于一条直线上。四连杆机构的位置以及长度需要满足有死点位置的条件，而且满足死点状态下，上折叠杆13和下折叠杆4位于一条直线上。上折叠杆13和下折叠杆4的铰接点可以位于上折叠杆13和下折叠杆4所形成的直线稍微靠前的一侧方便安装。这里前 方是朝向座位板14的一侧。使用四连杆机构折叠车架、利用死点位置自锁，不需要专门的锁定机构，结构简单。成本低。
折叠滑块6与底架侧边2之间设置锁死机构使下折叠杆4在展开状态时，折叠滑块6与底架侧边2之间锁死。锁死机构有多种，常见的结果都可以采用。也可以采用如下结构，即底架侧边2上设置弹块16，在折叠滑块6上设置容纳弹块16的锁止孔17，锁止孔17与弹块的形状对应。弹块16进入锁止孔17后锁死；按下弹块16解锁。弹块16设置在底架侧边2上，其余底架侧边2之间可以设置弹簧等弹性件使弹块16可以被压缩。弹块16也可以采用别的常用的结构满足功能。
弹块16靠近后轮3的一侧设置斜面，折叠滑块6向前轮1方向移动的过程中，向下压弹块16使弹块16缩回，锁止孔17与弹块16对应时，弹块16弹出锁死折叠滑块。斜面靠近后轮3的一侧低，靠近前轮1的一侧高。弹块16靠近前轮1的一侧不能设置成斜面，这样才有锁死的功能。
另外，上折叠杆13上部连接可伸缩的推杆18。可伸缩推杆18的伸缩结构有多种，可以采用现有技术中常用的结构。具体的结构可以参考专利CN205220764U一种双重锁定式手推车中推杆的结构或者其他专利中的可伸缩推杆的机构。两个第二连杆15之间设置伸出的扶手。扶手25的两侧分别设置在同侧的第二连杆15上。座位板14前端转动设置脚托19。脚托19转动可以折叠或者伸开。脚托19折叠的原理和结构可以参考现有的专利文件，不再详细描述。
进一步的，四连杆机构上也可以设置除了死点锁死之外的四连杆锁死装置。这里的四连杆锁死装置可以参见现有技术中四连杆常见的锁死装置。也可以采用如下结构：四连杆锁死装置包括儿童推车展开状态下同时穿入上折叠杆13和下折叠杆4的定位销。上折叠杆13和下折叠杆4对应定位销的位置设置定位销孔26。上折叠杆13和下折叠杆4铰接点的位置设置铰接轴孔27，定位销以及穿过上折叠杆13和下折叠杆4的铰接轴一同使上折叠杆13和下折叠杆4位置锁死。需要折叠儿童推车时，取出定位销即可。
如图1-12所示，折叠儿童推车的箱体结构，包括底架、底架包括两个底架侧边2；底架上铰接下折叠杆4，下折叠杆4上端铰接上折叠杆13，底架上设置箱体的底壳20，上折叠杆13上设置箱体的顶壳，儿童推车折叠后，底壳20和顶壳对齐构成行李箱形状的外壳。底壳20和顶壳可以对折叠儿童推车起到一定的保护作用，而且外形更加美观。配合推杆和车轮，可以像拉行李箱一样拉着推杆拖动折叠后的儿童推车。顶壳本身还可以作为儿童推车的靠背使用。
进一步的，顶壳包括顶壳框21和顶壳板22，顶壳框21的两侧分别与同侧的上折叠杆13固定，固定方式可以是螺栓连接或者设置中间连接件连接。顶壳板22与顶壳框21之间为可开合连接。
优选方案中，顶壳板22和顶壳框21之间由软布连接使顶壳板22的上部开合，下端不开合。顶壳板22可以向后转动到适当的位置。
顶壳板22下端不开合指顶壳板22的底部与顶壳框21或者座位板14或上折叠杆13铰接。其中顶壳框21的形状大致为倒立的U形，顶壳板22的两侧和上端通过软布连接顶壳框21；软布和顶壳板22构成允许背部躺卧的布兜。在图中显示的实施例中，顶壳板22底部两侧分别设置转动轴孔24，顶壳框21上对应位置也设置转动轴孔24，同侧的转动轴孔24内设置转动轴，从而使顶壳板22与顶壳框21铰接。
底壳20底部一侧设置容纳折叠后前轮1的前轮容纳槽23。前轮容纳槽23位于底壳20上靠近前轮1的一侧，具体位置与折叠后前轮1的位置相对应；其深度与前轮1折叠后的高度对应或者略大于前轮1折叠后的高度，前轮容纳槽23的靠近前轮方向的侧边外形与前轮1的运动轨迹对应。这样，推车整体折叠后，底壳20和前轮1的底部基本在一个平面上，方便放置以及移动，也更加美观。前轮1的折叠结构前文已经有详细的描述，不再具体说明。
上折叠杆13上端连接可伸缩的推杆18。儿童推车完全折叠后，前轮1折叠进入底壳20的前轮容纳槽23，后轮3可以在地面上滚动；底壳20和顶壳构成行李箱形状，推杆18可以伸缩，拉动推杆，可以像拉动行李箱一样拉动儿童推车。底壳20和顶壳起到一定保护儿童推车的作用。
如图1-12所示，行李箱式折叠儿童推车，包括底架、底架包括两个底架侧边2；底架侧边2两端位置分别设置前轮1和后轮3，底架侧边2的前轮1端铰接下折叠杆4，下折叠杆4与底架侧边2之间由连杆5连接在底架侧边2之间滑动的折叠滑块6，构成曲柄滑块机构。下折叠杆4上端铰接上折叠杆13，下折叠杆4向前伸出座位板14，座位板14与上折叠板13之间通过第二连杆15连接；下折叠杆4、上折叠杆13、第二连杆15、座位板14之间顺次连接构成四连杆机构。
进一步的，前轮1连接前轮支架7，前轮支架7与折叠滑块6转动连接；底架侧边2和前轮支架7其中任一设置螺旋导向槽8、另一个设置短导向杆9，短导向杆9设置在螺旋导向槽8内，折叠滑块6的前后移动带动前轮支架7移动并转动。
底架上设置箱体的底壳20，上折叠杆13上设置箱体的顶壳，儿童推车折叠后，底壳 20和顶壳对齐构成行李箱形状的外壳。底壳20底部一侧设置容纳折叠后前轮1的前轮容纳槽23。上折叠杆13上端连接可伸缩的推杆18。
儿童推车关于前轮折叠机构、底壳20和顶壳的具体结构、四连杆机构等的具体结构，前文已经详细描述，不再重复。
具体实施时，需要折叠推车时，对于有定位销的结构，首先需要取出穿过上折叠杆13和下折叠杆4的定位销，然后转动上折叠杆。对于没有定位销的结构，需要用手固定下折叠杆4，同时用力转动上折叠杆13使四连杆机构越过死点位置。上折叠杆13向前转动到与下折叠杆4折叠。用手按下底架侧边2上的弹块16使折叠滑块6解锁。向下转动下折叠杆4，折叠滑块6带动前轮支架7向后轮3的方向移动。短导向杆9经过直槽12和螺旋导向槽8使前轮支架7和前轮1向后轮3所在方向先移动直槽12的长度距离，然后继续直线移动并转动到底壳20内的前轮容纳槽23内，此时前轮1转动80度平放在前轮容纳槽23内。顶壳和底壳构成行李箱的形状。拉动推杆18，折叠推车后轮在地上滚动带动折叠推车行走。需要展开时，向上转动下折叠杆4，折叠滑块6沿着底架侧边2向前轮1方向移动，移动到弹块16的斜面时，由于斜面结构自动压缩弹块16，使弹块16缩回，锁止孔17与弹块16对应时，弹块16弹出锁死折叠滑块。然后向后转动上折叠杆13直到四连杆机构达到锁死状态。
需要说明的是，描述中使用的术语“中心”、“横向”、“纵向”、“前”、“后”、“左”、“右”、“上”和“下”、“竖直”、“水平”、“顶”、“底”“内”和“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了标语描述本专利，而不是指示或者暗示所指的装置或者原件必须具有特定的方位、以特定的方位构造和操作。因此不能理解为对本发明专利保护范围的限制。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。而且，对于本领域普通技术人员而言，在不脱离本发明的原理的精神的情况下对这些实施例进行多种变化、修改、替换和变型都在本说明书的范围内。

Claims (8)

  1. 行李箱式折叠儿童推车，包括底架、底架包括两个底架侧边；底架侧边两端附近位置分别设置前轮和后轮，底架侧边的前轮端铰接下折叠杆，下折叠杆与底架侧边之间由连杆连接在底架侧边之间滑动的折叠滑块，构成曲柄滑块机构，其特征在于：所述下折叠杆上端铰接上折叠杆，下折叠杆向前伸出座位板，座位板与上折叠板之间通过第二连杆连接；下折叠杆、上折叠杆、第二连杆、座位板之间顺次连接构成四连杆机构。
  2. 根据权利要求1所述行李箱式折叠儿童推车，其特征在于：所述前轮连接前轮支架，前轮支架与折叠滑块转动连接；底架侧边和前轮支架其中任一设置螺旋导向槽、另一个设置短导向杆，短导向杆设置在螺旋导向槽内，折叠滑块的前后移动带动前轮支架移动并转动。
  3. 根据权利要求2所述行李箱式折叠儿童推车，其特征在于：所述底架上设置箱体的底壳，上折叠杆上设置箱体的顶壳，儿童推车折叠后，底壳和顶壳对齐构成行李箱形状的外壳；底壳底部一侧设置容纳折叠后前轮的前轮容纳槽。
  4. 根据权利要求3所述行李箱式折叠儿童推车，其特征在于：顶壳包括顶壳框和顶壳板，顶壳框与上折叠杆固定，顶壳板和顶壳框之间由软布连接使顶壳板的上部开合，顶壳板的底部与顶壳框或者座位板或上折叠杆铰接。
  5. 根据权利要求1-4任一所述行李箱式折叠儿童推车，其特征在于：儿童推车展开状态下，四连杆机构处于死点位置。
  6. 根据权利要求1-4任一所述行李箱式折叠儿童推车，其特征在于：底架侧边上设置弹块，在折叠滑块上设置容纳弹块的锁止孔，弹块进入锁止孔后锁死；按下弹块解锁；所述弹块靠近后轮的一侧设置斜面，折叠滑块向前轮方向移动的过程中，向下压弹块使弹块缩回，锁止孔与弹块对应时，弹块弹出锁死折叠滑块。
  7. 根据权利要求1-4任一所述行李箱式折叠儿童推车，其特征在于：所述前轮支架位于底架侧边的内侧，折叠滑块既与底架侧边滑动连接，又与前轮支架转动连接。
  8. 根据权利要求7所述行李箱式折叠儿童推车，其特征在于：底架侧边位于前轮的一端设置前轮支撑槽，儿童推车展开状态时，前轮支架的前端进入前轮支撑槽内。
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