CN214985599U - Child's bike frame capable of being linked to fold or unfold seat supporting piece - Google Patents

Abstract

The utility model discloses a child's bike rack that seat support piece folded up or expanded can link, including preceding foot bar, back foot bar, rotate the rear wheel group of being connected with back foot bar, bracing piece, handlebar pole, back linkage, seat support piece front side and bracing piece on and near bracing piece lower extreme position rotate to be connected be equipped with between seat support piece rear side and the back linkage with the two rotate the back connecting rod of being connected, when folding up, back linkage cooperation back connecting rod so that seat support piece is folded up to the space between two back foot bars in, have simple structure, fold up or expand convenient characteristics.

Description

Child's bike frame capable of being linked to fold or unfold seat supporting piece

[ technical field ] A method for producing a semiconductor device

The present invention relates to a stroller, and more particularly to a stroller frame capable of being folded or unfolded in conjunction with a seat support.

[ background of the invention ]

Chinese patent document discloses a perambulator that closes fast that application number is 201921335503.9, it includes preceding foot group, back foot group, goes up handrail tube, back pipe, preceding handrail tube, seat frame and preceding footboard, still be equipped with the unblock portion of being connected with last handrail tube cooperation in the back pipe, unblock portion including the unblock push-button, connect in the unblock push-button limit inserted block, conflict setting in the unblock push-button inside holding chamber roof pressure spring, with the unblock push-button relative slip unblock setting receive pull block, set up at the socket of receiving pull block upper end, set up lock chute on receiving the pull block, with lock chute cooperation lock joint's haulage rope, with the lockpin of haulage rope tail end cooperation connection and with lockpin cooperation articulated locking block, still be provided with return spring in the locking block, roof pressure spring transversely sets up at back pipe inner wall, it is connected or separate with the socket cooperation to prescribe inserted block, the locking block is arranged in the backrest tube, and the lower end of the locking block is inserted into the inner cavity of the upper armrest tube. The patent document discloses a structure that a frame can fold seat frames in a linkage manner, and the seat frames are seat supporting members in the application document.

Meanwhile, the problem of large overall volume also exists after the folding is completed in the patent document.

Therefore, the present invention has been made in view of the above problems.

[ Utility model ] content

The utility model aims at overcoming prior art's not enough, providing a but linkage seat support piece folds up or the child's bike frame that expandes, can improve the problem that prior art exists, has simple structure, folds up or expandes the convenience to the frame is folding up the completion back, and whole frame is small.

The utility model discloses a realize through following technical scheme:

the utility model relates to a but linkage seat support piece folds up or the children's carriage that expandes can follow expansion state transform to fold condition after the unblock structure unblock, include:

the front leg rod 1, the front wheel group 11 is connected with the front leg rod 1 lower extreme.

The rear foot rod 2, the lower extreme of rear foot rod 2 is connected with rear wheel group 21, preceding foot rod 1 upper end is connected with rear foot rod 2 upper end rotation.

And the lower end of the support rod 3 is rotatably connected with the upper end of the front foot rod 1 or the upper end of the rear foot rod 2.

And the handle rod 4 is rotatably connected with the upper end of the support rod 3 at a position close to the lower end of the handle rod 4.

The upper end of the rear linkage piece 5 is rotatably connected with the lower end of the handle rod 4, the lower part of the rear linkage piece 5 is rotatably connected with the rear foot rod 2, and a front linkage rod 6 which is rotatably connected with the lower end of the rear linkage piece 5 and the front foot rod 1 is arranged between the lower end of the rear linkage piece 5 and the front foot rod 1.

The front side of the seat supporting piece 7 is rotatably connected with the supporting rod 3 and is close to the lower end of the supporting rod 3, and a rear connecting rod 71 which is rotatably connected with the rear side of the seat supporting piece 7 and the rear linkage piece 5 is arranged between the rear side of the seat supporting piece 7 and the rear linkage piece.

The child's carriage capable of folding or unfolding in linkage with the seat support member as described above has a front connecting rod 72 at the front side of the seat support member 7, and the front connecting rod 72 is rotatably connected to the support rod 3 near the lower end of the support rod 3.

The child car frame capable of being folded or unfolded through linkage of the seat supporting piece comprises a rear linkage piece 5, a rear linkage rod 51 and a swing rod 52, wherein the upper end of the rear linkage rod 51 is rotatably connected with the lower end of a handle bar 4, the lower end of the rear linkage rod 51 is rotatably connected with the rear end of a front linkage rod 6, the lower ends of the rear linkage rod 51 and a rear connecting rod 71 are rotatably connected around a first axis A1, the upper end of the swing rod 52 is rotatably connected with the upper portion of a rear foot bar 2, and the lower end of the swing rod 52 is relatively fixedly connected with the lower portion of the rear linkage rod 51.

The child's carriage with the foldable or unfoldable linked seat support as described above has the rear wheel set 21 pivotally connected to the lower end of the rear foot bar 2 about the second axis a 2. A linkage component 8 which can pull the rear wheel set 21 to rotate and fold towards the inner side of the rear foot rod 2 when the frame is changed from the unfolding state to the folding state is arranged between the rear linkage component 5 and the rear wheel set 21.

As mentioned above, the stroller frame capable of being folded or unfolded with the linked seat support, wherein the linkage assembly 8 comprises an upper linkage rod 81, a transition linkage block 82 and a lower linkage block 83, the upper end of the upper linkage rod 81 is rotatably connected with the lower part of the rear linkage 5 around a sixth axis a6, the lower end of the upper linkage rod 81 is rotatably connected with the upper end of the transition linkage block 82 around a third axis A3, the lower end of the transition linkage block 82 is rotatably connected with the upper end of the lower linkage block 83 around a fourth axis a4, and the lower end of the lower linkage block 83 is rotatably connected with the rear wheel set 21 around a fifth axis a 5.

The stroller frame capable of being linked to fold or unfold the seat supporting member as described above has a reinforcing rod 22 between the two rear leg rods 2, one end of which is connected to one rear leg rod 2 and the other end of which is connected to the other rear leg rod 2.

The child carriage frame capable of being folded or unfolded in linkage with the seat support member further comprises a locking structure 100 capable of locking the carriage frame and an unlocking structure 200 capable of unlocking the locking structure 100.

The child's carriage with foldable or unfoldable linked seat support as described above, the locking structure 100 comprises a left housing 110 provided at a lower portion of the handle bar 4 and a right housing 120 provided at an upper end of the support bar 3 and rotatable 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 4.

The stroller frame capable of being folded or unfolded in conjunction with the seat support as described above has the unlocking structure 200, which is an unlocking part provided on the handle bar 4 and capable of being connected to the rotation block 130 through the pull cord 170.

Compared with the prior art, the utility model has the advantages of as follows:

1. when the utility model is folded, the frame is unlocked first, the operating handle rod is turned forwards and upwards by taking the upper end of the supporting rod as a base point, then the handle bar is pressed downwards, so that the upper end of the rear foot bar is used as a base point to rotate downwards and draw close the rear foot bar in a linkage way, the handle bar draws close to one side of the support bar, meanwhile, the handle bar drives the upper end of the rear linkage piece to rotate downwards with a connecting shaft between the rear linkage piece and the rear foot bar as a rotating shaft to be drawn close to the lower end of the rear foot bar, at the moment, the lower end of the rear linkage piece drives the rear end of the front linkage bar to move upwards to be drawn close to the upper end of the rear foot bar, thereby leading the front foot rod to rotate backwards by taking the upper end of the rear foot rod as a base point and draw close towards the rear foot rod, simultaneously leading the seat supporting piece to rotate backwards and downwards by matching the rear linkage piece with the rear connecting rod and draw close towards the rear foot rod, so that the seat support is folded into the space between the two rear foot bars, thereby completing the folding of the frame. When the folding child bicycle is unfolded, the handle rod is operated to rotate towards one side far away from the rear foot rod, the handle rod drives the supporting rod to rotate backwards and upwards with the upper end of the rear foot rod as a base point until the folding child bicycle is unfolded, meanwhile, the handle rod drives the upper end of the rear linkage piece to rotate backwards and upwards, the rear linkage piece is matched with the rear connecting rod to drive the seat support piece to move backwards and upwards so that the seat support piece is unfolded until the folding child bicycle is unfolded, the lower end of the rear linkage piece is matched with the front linkage piece to drive the front foot rod to rotate forwards with the upper end of the rear foot rod as the base point until the folding bicycle is unfolded, namely, the folding child bicycle is unfolded at an angle with the rear foot rod, so that the effect of folding child bicycle frame by one key or unfolding by one key is achieved, meanwhile, the folding child bicycle is high in efficiency and stable in structure, the use performance of the child bicycle is improved, and the folding child bicycle has the characteristics of being simple in structure and low in manufacturing cost.

2. The seat support piece front side utensil is equipped with preceding connecting rod, preceding connecting rod and bracing piece on and be close to the bracing piece lower extreme position and rotate and be connected, when folding up, through preceding connecting rod and back connecting rod cooperation, can make seat support piece folded up to the space between two back foot bars in, seat support piece and back foot bar level promptly for the whole volume after the frame is folded is littleer.

3. The rear linkage piece comprises a rear linkage rod and a swing rod, the upper end of the rear linkage rod is connected with the lower end of the handle rod in a rotating mode, the lower end of the rear linkage rod is connected with the rear end of the front linkage rod in a rotating mode, the rear linkage rod is connected with the lower end of the rear connecting rod in a rotating mode around a first axis, the upper end of the swing rod is connected with the upper portion of the rear foot rod in a rotating mode, the lower end of the swing rod is fixedly connected with the lower portion of the rear linkage rod relatively, the rear linkage rod is connected with the rear foot rod in a rotating mode through the swing rod, when the rear linkage rod is folded, the swing rod can swing and deflect according to requirements, the upper end of the rear linkage rod is made to be closer to the lower end of the rear foot rod, the lower end of the rear linkage rod is made to be closer to the upper end of the rear foot rod, the supporting rod is made to be closer to one side of the rear foot rod, and the frame is made to be smaller in overall size and convenient to fold and unfold.

4. The rear wheel set is connected with the lower end of the rear foot rod in a rotating way around a second axis. Be equipped with between back linkage and the rear wheel group and work as the frame can pull the rear wheel group and rotate the linkage subassembly of folding up to the rear foot pole inboard when changing to fold state from the expansion state, can make after the frame is folded, whole volume is littleer, and simultaneously at the folding in-process of frame, the linkage subassembly can pull the rear wheel group and rotate to fold up to the rear foot pole inboard, has reasonable in design and folds up efficiently.

5. The utility model discloses after folding up, the rear wheel group is folded up to the inboard rotation of back foot pole for the relative frame of wheel lateral surface of rear wheel group sets up down, is down to the holding surface direction promptly, and because of wheel lateral surface level, when depositing or transporting the frame, on the holding surface was arranged in to the wheel lateral surface of this back wheel group, it places in the holding surface and keeps the state of standing to enable the frame steadily, makes the frame whole erect along back foot pole length direction simultaneously and places, and convenience of customers puts and takes to and convenience of customers expandes the frame next time.

[ description of the drawings ]

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is one of the structural schematic diagrams of the present invention in the unfolded state.

Fig. 2 is a second schematic structural diagram 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 a schematic structural diagram of the rear wheel set of the present invention.

Fig. 5 is a schematic view of the present invention in the folding process when the folded state is moved from the unfolded state.

Fig. 6 is a second schematic view of the folding process when the folding state is moved from the unfolded state according to the present invention.

Fig. 7 is a third schematic view of the folding process when the folded state is moved from the unfolded state.

Fig. 8 is a schematic view showing the completion of folding when the folded state is moved from the unfolded state.

Fig. 9 is an exploded view of the locking structure of the present invention.

[ detailed description ] embodiments

The following describes embodiments of the present invention in detail with reference to fig. 1 to 9.

As shown in figures 1-9, the stroller frame of the present invention, which can be linked to fold or unfold the seat support, can be changed from an unfolded state to a folded state after an unlocking structure is unlocked, comprises a front leg bar 1, a rear leg bar 2, a support bar 3, a handle bar 4, a rear linkage 5 and a seat support 7. The utility model discloses a bicycle handlebar with the front linkage, including front foot pole 1, back foot pole 2, back linkage 5, back foot pole 2, front foot pole 1, back foot pole 2, back wheel group 11, front foot pole 1 upper end is connected with back foot pole 2 upper end rotation, 3 lower extremes of bracing piece are connected with front foot pole 1 upper end or back foot pole 2 upper end rotation, handle pole 4 is last and is connected with bracing piece 3 upper end rotation near its lower extreme position, back linkage 5 lower part is connected with back foot pole 2 rotation, be equipped with between back linkage 5 lower extreme and the front foot pole 1 with the preceding gangbar 6 that the two is connected that rotates, seat support 7 front side and bracing piece 3 are last and are close to bracing piece 3 lower extreme position rotation and are connected, be equipped with the back connecting rod 71 that the two rotates between seat support 7 rear side and the back linkage 5. When the utility model is folded, the frame is unlocked first, the operating handle rod is turned forwards and upwards by taking the upper end of the supporting rod as a base point, then the handle bar is pressed downwards, so that the upper end of the rear foot bar is used as a base point to rotate downwards and draw close the rear foot bar in a linkage way, the handle bar draws close to one side of the support bar, meanwhile, the handle bar drives the upper end of the rear linkage piece to rotate downwards with a connecting shaft between the rear linkage piece and the rear foot bar as a rotating shaft to be drawn close to the lower end of the rear foot bar, at the moment, the lower end of the rear linkage piece drives the rear end of the front linkage bar to move upwards to be drawn close to the upper end of the rear foot bar, thereby leading the front foot rod to rotate backwards by taking the upper end of the rear foot rod as a base point and draw close towards the rear foot rod, simultaneously leading the seat supporting piece to rotate backwards and downwards by matching the rear linkage piece with the rear connecting rod and draw close towards the rear foot rod, so that the seat support is folded into the space between the two rear foot bars, thereby completing the folding of the frame.

When the folding bicycle is unfolded, the handle rod is operated to rotate towards one side far away from the back foot rod, and the handle rod drives the supporting rod to rotate backwards and upwards by taking the upper end of the back foot rod as a base point until the folding bicycle is unfolded. Meanwhile, the handle bar drives the upper end of the rear linkage piece to rotate backwards and upwards, the rear linkage piece is matched with the rear connecting rod to drive the seat support piece to move backwards and upwards to enable the seat support piece to be in an unfolded state, the lower end of the rear linkage piece is matched with the front linkage rod to drive the upper end of the front foot bar to be a base point and rotate forwards until the seat support piece is in the unfolded state, and the rear foot bar is pulled open to be in an angle unfolded state, so that the effect of one-key folding or one-key unfolding of the baby carriage frame is achieved, the folding efficiency is high, the structure is stable, the use performance of the baby carriage is improved, and the child carriage frame has the advantages of being simple in structure and low in manufacturing cost.

As shown in fig. 1, the seat support 7 has a front link 72 at a front side thereof, and the front link 72 is rotatably connected to the support rod 3 at a position near a lower end of the support rod 3. As shown in fig. 5-7, when folded, the front link 72 and the rear link 71 cooperate with each other to fold the seat support 7 into the space between the two rear foot bars 2, i.e. the seat support 7 is horizontal to the rear foot bars 2, so that the overall volume of the folded frame is smaller.

As shown in fig. 1-2 and 7-8, the rear linkage 5 comprises a rear linkage rod 51 and a swing rod 52, the upper end of the rear linkage rod 51 is rotationally connected with the lower end of the handle rod 4, the lower end of the rear linkage rod 51 is rotationally connected with the rear end of the front linkage rod 6, the rear linkage rod 51 is rotatably connected with the lower end of the rear connecting rod 71 around a first axis A1, the upper end of the swing rod 52 is rotatably connected with the upper part of the rear foot rod 2, the lower end of the swing rod 52 is relatively fixedly connected with the lower part of the rear linkage rod 51, the rear linkage rod is rotationally connected with the rear foot rod through the swing rod, and can swing and offset according to requirements through the swing rod when being folded, thereby leading the upper end of the rear linkage rod and the lower end of the rear foot bar to be closer, leading the lower end of the rear linkage rod and the upper end of the rear foot bar to be closer, thereby make the bracing piece more draw close to foot pole one side backward for the whole volume is littleer and convenient folding up and expand after the frame is folding.

As shown in fig. 6 and 8, the rear wheel set 21 is rotatably connected to the lower end of the rear foot bar 2 about a second axis a 2. Be equipped with between back linkage 5 and the rear wheel group 21 and work as the frame can pull rear wheel group 21 when changing to fold state from the expansion state and rotate the linkage subassembly 8 of folding to 2 inboards of back foot pole, can make the frame folding back, whole volume is littleer, and simultaneously at the folding in-process of frame, linkage subassembly 8 can pull rear wheel group 21 and rotate to fold up to 2 inboards of back foot pole, has reasonable in design and folds up efficiently.

As shown in fig. 2 and 4, the linkage assembly 8 includes an upper linkage rod 81, a transition linkage block 82 and a lower linkage block 83, the upper end of the upper linkage rod 81 is rotatably connected with the lower portion of the rear linkage piece 5 around a sixth axis a6, the lower end of the upper linkage rod 81 is rotatably connected with the upper end of the transition linkage block 82 around a third axis A3, the lower end of the transition linkage block 82 is rotatably connected with the upper end of the lower linkage block 83 around a fourth axis a4, and the lower end of the lower linkage block 83 is rotatably connected with the rear wheel set 21 around a fifth axis a 5. When the folding bicycle is folded, the handle rod 4 is pressed downwards, so that the rear linkage rod 51 rotates by taking a connecting shaft between the rear foot rod and the swing rod 52 as a base shaft through the swing rod 52, the lower part of the rear linkage rod 51 moves forwards and upwards, the upper linkage rod 81 is driven to move forwards and upwards relative to the rear foot rod 2, and in the moving process of the upper linkage rod 81, the upper linkage rod 81 pulls the rear wheel set 21 to rotate and fold towards the inner side of the rear foot rod 2 by taking the second axis A2 as a rotating shaft through the transition linkage block 82 and the lower linkage block 83.

As shown in fig. 1-2, a reinforcing rod 22 is disposed between the two rear leg rods 2, one end of which is connected to one rear leg rod 2 and the other end of which is connected to the other rear leg rod 2, for improving the structural strength.

As shown in fig. 1 and 9, the frame further comprises a locking structure 100 capable of locking the frame and an unlocking structure 200 capable of unlocking the locking structure 100, so that the frame can be always locked by the locking structure when the frame is in an unfolded state or a folded state, the frame is prevented from being folded or unfolded, and the safety is high.

As shown in fig. 9, the locking structure 100 includes a left housing 110 disposed at a lower portion of the handle bar 4 and a right housing 120 disposed at an upper end of the support bar 3 and capable of rotating relative to the left housing 110, the left housing 110 and the right housing 120 define a cavity, a rotation 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 rotation 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 rotation block 130 rotates are disposed on the spline 140, clamping slots 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 rotation block 130 to rotate is disposed in the handle bar 4. The unlocking structure 200 is an unlocking portion provided on the handle bar 4 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 structure 100 is unlocked, and the frame is unlocked.

As shown in fig. 8, the utility model discloses after folding up, back wheelset 21 is folded up to 2 inboard rotations of back foot pole for the relative frame of wheel lateral surface of back wheelset 2 sets up down, the bearing surface direction that faces down promptly, and sets up because of wheel lateral surface level, when depositing or transporting the frame, the wheel lateral surface of this back wheelset is arranged in on the bearing surface, enables the frame and places steadily in the bearing surface, prevents that the frame from rocking, makes the whole back foot pole length direction of following of frame erect simultaneously and places, and convenience of customers puts and takes to and convenience of customers expandes the frame next time.

The working principle is as follows: when the bicycle is folded, 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, namely, the support rod 3 and the handle rod 4 rotate relative to each other, and the bicycle frame is unlocked.

Then user operation handle pole 4 is the benchmark after foot pole 2 forward to the upset of going up, later pushes down handle pole 4, at this in-process, handle pole 4 drive bracing piece 3 after the foot pole 2 upper end position basic point and backward rotate downwards to draw close to back foot pole 2 one side, handle pole 4 draws close to bracing piece 3 one side toward 3 upper ends of bracing piece for the basic point. Meanwhile, the handle rod 4 is linked with the upper end of the rear linkage rod 51 to rotate downwards and forwards by taking the connecting shaft between the swing rod 52 and the rear foot rod 2 as a base shaft, the lower end of the rear foot rod 2 is closed, meanwhile, the rear linkage rod 51 is matched with the rear connecting rod 71, so that the seat supporting piece 7 moves downwards and forwards and is closed towards one side of the rear foot rod 2, and the seat supporting piece 7 is folded into a space between the two rear foot rods 2. Meanwhile, the lower end of the rear linkage rod 51 drives the rear end of the front linkage rod 6 to rotate upwards and backwards by taking a connecting shaft between the swing rod 52 and the rear foot rod 2 as a base shaft, and the rear linkage rod is drawn towards one side of the upper end of the rear foot rod 2, in the process, the upper end of the rear linkage rod 51 is matched with the front linkage rod 6 to drive the front foot rod 1 to rotate backwards by taking the upper end of the rear foot rod 2 as a base point, and the rear linkage rod 2 is drawn towards one side of the rear foot rod 2. Meanwhile, the lower part of the rear linkage rod 51 drives the upper end of the upper linkage rod 81 to move forward and upward relative to the rear foot rod 2, and in the moving process of the upper linkage rod 81, the upper linkage rod 81 drives the rear wheel set 21 to rotate and fold towards the inner side of the rear foot rod 2 by taking the second axis A2 as a rotating shaft through the transition linkage block 82 and the lower linkage block 83. Thereby completing the folding and folding of the frame.

When the seat support piece 7 is unfolded, the operating handle rod 4 moves backwards and upwards by taking the rear foot rod 2 as a reference, in the process, the handle rod 4 drives the support rod 3, the upper end of the rear foot rod 2 serves as a rotating shaft and rotates backwards and upwards, meanwhile, the handle rod 4 drives the lower end of the rear linkage rod 51 to rotate backwards and upwards, and in the process, the rear linkage rod 51 is matched with the rear connecting rod 71 so that the seat support piece 7 rotates backwards and upwards to be unfolded. The lower end of the rear linkage rod 51 drives the rear end of the front linkage rod 6 to move forwards and downwards, so that the front foot rod 1 and the upper end of the rear foot rod 2 are used as rotating shafts and move forwards until the front foot rod is in an unfolded state. The lower part of the rear linkage rod 51 is linked with the upper linkage rod 81 to move downwards relative to the rear foot rod 2, and in the moving process of the upper linkage rod 81, the upper linkage rod 81 drives the rear wheel set 21 to rotate towards the outer side of the rear foot rod 2 by taking the second axis A2 as a rotating shaft through the transition linkage block 82 and the lower linkage block 83 until the rear wheel set is in an unfolded state.

At last, the operating handle rod 4 is turned backwards by taking the upper end of the support rod 3 as a rotating shaft until the handle rod 4 and the rear linkage rod 51 are positioned on the same axis, at the moment, the spring 160 elastically resets to drive the spline 140 to reset so as to simultaneously clamp the clamping groove 170 of the left shell 110 and the right shell 120, namely, the left shell 110 and the right shell 120 are relatively locked, namely, the frame is locked, so that the effect of one-key folding or one-key unfolding of the child frame is realized, the folding efficiency is high, the structure is stable, the use performance of the child car is improved, and the whole volume of the folded frame is smaller.

Claims (9)

1. A child's frame that can link seat support piece and fold or expand can change from the expanded state to folded state after unlocking the structure of unblock, its characterized in that includes:

the lower end of the front foot rod (1) is connected with a front wheel set (11);

the lower end of the rear foot rod (2) is connected with a rear wheel set (21), and the upper end of the front foot rod (1) is rotatably connected with the upper end of the rear foot rod (2);

the lower end of the supporting rod (3) is rotatably connected with the upper end of the front foot rod (1) or the upper end of the rear foot rod (2);

the upper end of the support rod (3) is rotatably connected with the upper end of the handle rod (4) close to the lower end of the handle rod (4);

the upper end of the rear linkage piece (5) is rotatably connected with the lower end of the handle rod (4), the lower part of the rear linkage piece (5) is rotatably connected with the rear foot rod (2), and a front linkage rod (6) which is rotatably connected with the lower end of the rear linkage piece (5) and the front foot rod (1) is arranged between the lower end of the rear linkage piece (5) and the front foot rod;

the seat supporting piece (7), seat supporting piece (7) front side and bracing piece (3) are gone up and are close to bracing piece (3) lower extreme position and rotate and be connected, be equipped with between seat supporting piece (7) rear side and back linkage (5) with both rotate rear connecting rod (71) of being connected.

2. A stroller frame for a child foldable or unfoldable in a ganged seat support according to claim 1, characterized in that the seat support (7) has a front link (72) at the front, said front link (72) being pivotally connected to the support bar (3) near the lower end of the support bar (3).

3. A stroller frame for folding or unfolding a seat support according to claim 1, wherein the rear linkage member (5) comprises a rear linkage rod (51) and a swing link (52), the upper end of the rear linkage rod (51) is rotatably connected to the lower end of the handle bar (4), the lower end of the rear linkage rod (51) is rotatably connected to the rear end of the front linkage rod (6), the rear linkage rod (51) is rotatably connected to the lower end of the rear link rod (71) about a first axis (a1), the upper end of the swing link (52) is rotatably connected to the upper portion of the rear foot bar (2), and the lower end of the swing link (52) is relatively fixedly connected to the lower portion of the rear linkage rod (51).

4. A stroller frame for folding or unfolding a gangable seat support according to claim 1, wherein said rear wheel set (21) is pivotally connected to the lower end of the rear foot bar (2) about a second axis (a 2); a linkage component (8) which can pull the rear wheel set (21) to rotate and fold towards the inner side of the rear foot rod (2) when the frame is changed from the unfolding state to the folding state is arranged between the rear linkage component (5) and the rear wheel set (21).

5. A stroller frame for a child foldable or unfoldable in a coordinated manner according to claim 4, characterized in that said linkage assembly (8) comprises an upper linkage rod (81), a transition linkage block (82) and a lower linkage block (83), the upper end of said upper linkage rod (81) being rotatably connected to the lower part of the rear linkage (5) about a sixth axis (A6), the lower end of said upper linkage rod (81) being rotatably connected to the upper end of the transition linkage block (82) about a third axis (A3), the lower end of said transition linkage block (82) being rotatably connected to the upper end of the lower linkage block (83) about a fourth axis (A4), and the lower end of said lower linkage block (83) being rotatably connected to the rear wheel set (21) about a fifth axis (A5).

6. A stroller frame for a child foldable or unfoldable in conjunction with a seat support according to claim 1, characterised in that a reinforcing bar (22) is provided between the rear legs (2), one end of which is connected to one of the rear legs (2) and the other end of which is connected to the other rear leg (2).

7. A frame for a child's carriage with a foldable or unfoldable seat support according to any of claims 1 to 6, characterised in that the frame further comprises a locking structure (100) capable of locking the frame and an unlocking structure (200) capable of unlocking the locking structure (100).

8. The stroller frame capable of being folded or unfolded according to claim 7, wherein the locking structure (100) comprises a left housing (110) disposed at a lower portion of the handle bar (4) and a right housing (120) disposed at an upper end of the support bar (3) 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 planes are circumferentially arrayed on the rotating block (130), 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 are disposed on the spline (140), and a plurality of engaging slots (150) capable of engaging with the spline (140) are disposed on the left housing (110) and the right housing (120), 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 (4).

9. The stroller frame for folding or unfolding of a gangable seat support according to claim 8, wherein the unlocking mechanism (200) is an unlocking part provided on the handle bar (4) and capable of being connected to the rotary block (130) by a pull cord (170).

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