CN212890544U

CN212890544U - Support frame and infant handcart using same

Info

Publication number: CN212890544U
Application number: CN202022247479.2U
Authority: CN
Inventors: 顾总照
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-05
Filing date: 2020-10-05
Publication date: 2021-04-06
Anticipated expiration: 2030-10-05

Abstract

The utility model discloses a support frame and infant handcart, have vertical symmetry plane, a pedestal, the connecting rod, the slider, left lower support bar, right lower support bar, left upper support bar and right upper support bar, left lower support bar is connected with the base rotation around first axis, right lower support bar is connected with the base rotation around the second axis, left upper support bar is connected with the slider rotation around the third axis, left lower support bar is connected on left upper support bar in rotation, right upper support bar is connected with the slider rotation around the fourth axis, right lower support bar is connected on right upper support bar in rotation; first axis, second axis, third axis and fourth axis all are the acute angle setting with vertical symmetry plane, and when the slider gliding, upper left bracing piece lower extreme, left lower support bar rear end, upper right bracing piece lower extreme and right lower support bar rear end removed to being close to vertical symmetry plane position from the position of keeping away from vertical symmetry plane. The utility model discloses folding back is small for support frame and infant's handcart.

Description

Support frame and infant handcart using same

[ technical field ] A method for producing a semiconductor device

The utility model relates to a support frame and applied infant's handcart of this support frame.

[ background of the invention ]

Many of the existing products need to be folded, such as a baby carriage or a pet carriage, so as to be unfolded or folded, but the existing folding frame has large volume, is inconvenient to fold, has large volume after being folded, and is inconvenient to carry.

[ Utility model ] content

The utility model aims at overcoming the defects of the prior art, providing a baby trolley which is convenient to fold, small in size after being folded and uses the support frame.

The utility model discloses a realize through following technical scheme:

a support frame having a vertical plane of symmetry SP and movable from an unfolded position to a folded position, characterized in that: comprises a base 1, a connecting rod 2 is connected on the base 1, a lower support 3 is further arranged on the base 1, the lower support 3 comprises a left lower support rod 31 and a right lower support rod 32 which are arranged at two sides of a vertical symmetrical plane SP, the front end of the left lower support rod 31 is rotationally connected with the base 1 around a first axis A, the front end of the right lower support rod 32 is rotationally connected with the base 1 around a second axis B, a sliding part 4 which can slide relative to the connecting rod 2 is further arranged on the connecting rod 2, an upper support 5 which can draw the left lower support rod 31 and the right lower support rod 32 together when the sliding part 4 slides downwards relative to the connecting rod 2 is arranged between the sliding part 4 and the lower support 3, the upper support 5 comprises a left upper support rod 51 and a right upper support rod 52 which are arranged at two sides of the vertical symmetrical plane SP, the upper end of the left upper support rod 51 is rotationally connected with the sliding part 4 around a third, the rear end of the left lower support rod 31 is rotatably connected to the left upper support rod 51, the upper end of the right upper support rod 52 is rotatably connected to the sliding member 4 around a fourth axis D, and the rear end of the right lower support rod 32 is rotatably connected to the right upper support rod 52; the first axis a and the vertical symmetry plane SP are arranged at an acute angle, and the third axis C and the vertical symmetry plane SP are arranged at an acute angle, so that when the sliding member 4 slides downwards, the lower end of the left upper supporting rod 51 and the rear end of the left lower supporting rod 31 can move from a position far away from the vertical symmetry plane SP to a position close to the vertical symmetry plane SP; second axis B is acute angle setting with vertical symmetry plane SP, just fourth axis D is acute angle setting with vertical symmetry plane SP slider 4 when gliding, the lower extreme of upper right bracing piece 52 and the rear end of right lower bracing piece 32 can be followed the position of keeping away from vertical symmetry plane SP and removed to being close to vertical symmetry plane SP position.

The lower end of the left upper supporting rod 51 is rotatably connected with the rear end of the left lower supporting rod 31 around a fifth axis E, and the fifth axis E and the vertical symmetry plane SP are arranged in an acute angle; the lower end of the upper right support rod 52 is rotatably connected to the rear end of the lower right support rod 32 about a sixth axis F, and the sixth axis F is disposed at an acute angle to the vertical symmetry plane SP.

Infant pushchair having a vertical plane of symmetry SP and being movable from an unfolded position to a folded position after unlocking a locking device 6, characterized in that: comprises a supporting frame and a push rod component 7 connected with the supporting frame; the support frame comprises a base 1 provided with a front wheel 11, a connecting rod 2 is connected to the base 1, a lower support frame 3 is further arranged on the base 1, the lower support frame 3 comprises a left lower support rod 31 and a right lower support rod 32 which are arranged on two sides of a vertical symmetry plane SP, the front end of the left lower support rod 31 is rotatably connected with the base 1 around a first axis A, the front end of the right lower support rod 32 is rotatably connected with the base 1 around a second axis B, a sliding part 4 capable of sliding relative to the connecting rod 2 is further arranged on the connecting rod 2, an upper support frame 5 capable of being drawn close to the left lower support rod 31 and the right lower support rod 32 when the sliding part 4 slides downwards relative to the connecting rod 2 is arranged between the sliding part 4 and the lower support frame 3, the upper support frame 5 comprises a left upper support rod 51 and a right upper support rod 52 which are arranged on two sides of the vertical symmetry plane SP, the upper end of the left upper support rod 51 is, the lower end of the left upper supporting rod 51 or the rear end of the left lower supporting rod 31 is connected with a left rear wheel 511, the rear end of the left lower supporting rod 31 is rotatably connected to the left upper supporting rod 51, the upper end of the right upper supporting rod 52 is rotatably connected with the sliding member 4 around a fourth axis D, the lower end of the right upper supporting rod 52 or the rear end of the right lower supporting rod 32 is connected with a right rear wheel 521, and the rear end of the right lower supporting rod 32 is rotatably connected to the right upper supporting rod 52; the first axis a and the vertical symmetry plane SP are arranged at an acute angle, and the third axis C and the vertical symmetry plane SP are arranged at an acute angle, so that when the sliding member 4 slides downwards, the lower end of the left upper supporting rod 51 and the rear end of the left lower supporting rod 31 can move from a position far away from the vertical symmetry plane SP to a position close to the vertical symmetry plane SP; second axis B is acute angle setting with vertical symmetry plane SP, just fourth axis D is acute angle setting with vertical symmetry plane SP slider 4 when gliding, the lower extreme of upper right bracing piece 52 and the rear end of right lower bracing piece 32 can be followed the position of keeping away from vertical symmetry plane SP and removed to being close to vertical symmetry plane SP position.

The push rod component 7 is sleeved on the connecting rod 2 and can slide relative to the connecting rod 2, and when the push rod component 7 slides downwards relative to the connecting rod 2, the push rod component 7 pushes the sliding part 4 to approach the base.

The infant pushchair further comprises a seat assembly 9 arranged between the push rod assembly 7 and the slider 4 and capable of folding when the push rod assembly 7 slides relative to the connecting rod 2.

The push rod assembly 7 comprises a lower push rod 71 which is slidably sleeved on the connecting rod 2, and a shell 81 is further sleeved on the lower push rod 71; the seat assembly 9 includes a seat 91 and a backrest 92 which can be rotated and folded with each other, a transmission rod 93 which can be rotatably connected with the seat 91 and the slider 4 is connected between the seat 91 and the slider 4, a lower end of the transmission rod 93 is rotatably connected with the slider 4 around a seventh axis G, an upper end of the transmission rod 93 is rotatably connected with the seat 91 around an eighth axis H, a rear side of the seat 91 is rotatably connected with the housing 81 around a ninth axis I, and a lower side of the backrest 92 is rotatably connected with the housing 81 around a tenth axis J.

An elastic piece 94 which can enable the backrest 92 to reset is arranged between the shell 81 and the backrest 92;

the seat 91 is provided with a first abutting surface 911, and the backrest 92 is provided with a second abutting surface 921 which abuts against the first abutting surface 911 when the seat assembly 9 is in the unfolded state.

A folding rod assembly 53 is arranged between the left upper support rod 51 and the right upper support rod 52, the folding rod assembly 53 includes a first support rod 531 rotatably connected to the left upper support rod 51 and a second support rod 532 rotatably connected to the right upper support rod 52, and the first support rod 531 and the second support rod 532 are rotatably connected.

The push rod assembly 7 comprises a lower push rod 71 slidably sleeved on the connecting rod 2, and a locking device 8 which locks the lower push rod 71 on the connecting rod 2 and can drive the locking device 6 to unlock when the lower push rod 71 slides downwards relative to the connecting rod 2 is arranged on the lower push rod 71.

Compared with the prior art, the utility model discloses there is following advantage:

1. the utility model discloses a carriage when folding promotes the slider and glides downwards on the connecting rod, and when slider glides downwards, the slider drives the upper end lapse of upper left bracing piece and upper right bracing piece for the slider draws close to the base, and upper left bracing piece and upper right bracing piece draw close to lower right bracing piece left, and the relative under bracing frame of connecting rod rotates and draws close, thereby makes the carriage reduce on the direction of height, first axis A and third axis C are the acute angle setting with vertical symmetry plane SP, and second axis B and fourth axis D are the acute angle setting with vertical symmetry plane SP, consequently when the slider glides, the lower extreme of upper left bracing piece and the rear end of left under bracing piece can move to being close to vertical symmetry plane SP position from the position of keeping away from vertical symmetry plane SP, simultaneously the lower extreme of upper right bracing piece and the rear end of lower right bracing piece can move to being close to vertical symmetry plane SP from the position of keeping away from vertical symmetry plane SP The SP position of the plane enables the support frame to be reduced in the width direction, the size of the support frame after being folded is minimized, the support frame is more convenient to carry and store, folding of the folding frame can be achieved only by pushing the sliding piece, folding connecting rods are reduced, and folding is more convenient.

2. The utility model discloses simple structure, the folding operation of the user of being convenient for, folding back is small moreover and is convenient for the user to carry.

[ description of the drawings ]

Fig. 1 is one of the perspective views of the support frame of the present invention;

fig. 2 is one of the plan views of the support frame of the present invention;

fig. 3 is a second perspective view of the support frame of the present invention;

fig. 4 is a second plan view of the support frame of the present invention;

FIG. 5 is a perspective view of the infant stroller of the present invention;

fig. 6 is a second perspective view of the infant stroller of the present invention;

FIG. 7 is a perspective view of the seat assembly of the infant stroller of the present invention when folded;

FIG. 8 is a plan view of the infant stroller of the present invention partially folded;

FIG. 9 is a perspective view of the fully folded infant stroller of the present invention;

fig. 10 is a second perspective view of the fully folded infant stroller of the present invention;

FIG. 11 is an exploded view of the infant stroller of the present invention;

FIG. 12 is a cross-sectional view of the infant stroller of the present invention;

FIG. 13 is an enlarged view of the region L in FIG. 12;

FIG. 14 is an exploded view of the locking device of the infant stroller of the present invention;

FIG. 15 is a second exploded view of the locking device of the infant stroller of the present invention;

fig. 16 is an enlarged view of the region K in fig. 12;

FIG. 17 is an exploded view of the locking device of the infant stroller of the present invention;

fig. 18 is a second exploded view of the locking device of the infant stroller of the present invention.

[ detailed description ] embodiments

The invention will be further described with reference to the accompanying drawings:

example 1: as shown in fig. 1 to 4, a first aspect of the present invention provides a support frame having a vertical symmetry plane SP and being capable of moving from an unfolded position to a folded position, comprising a base 1, wherein a connecting rod 2 is connected to the base 1, a lower support frame 3 is further provided on the base 1, the lower support frame 3 comprises a left lower support rod 31 and a right lower support rod 32 which are provided at two sides of the vertical symmetry plane SP, the front end of the left lower support rod 31 is rotatably connected to the base 1 around a first axis a, the front end of the right lower support rod 32 is rotatably connected to the base 1 around a second axis B, a sliding member 4 capable of sliding relative to the connecting rod 2 is further provided on the connecting rod 2, an upper support frame 5 capable of drawing close the left lower support rod 31 and the right lower support rod 32 when the sliding downward relative to the connecting rod 2 is provided between the sliding member 4 and the lower support frame 3, the upper support frame 5 comprises a left upper support rod 51 and a right upper support rod 52 which are provided at two sides, the upper end of the left upper support rod 51 is rotatably connected with the sliding part 4 around a third axis C, the rear end of the left lower support rod 31 is rotatably connected with the left upper support rod 51, the upper end of the right upper support rod 52 is rotatably connected with the sliding part 4 around a fourth axis D, and the rear end of the right lower support rod 32 is rotatably connected with the right upper support rod 52;

the first axis a and the vertical symmetry plane SP are arranged at an acute angle, and the third axis C and the vertical symmetry plane SP are arranged at an acute angle, so that when the sliding member 4 slides downwards, the lower end of the left upper supporting rod 51 and the rear end of the left lower supporting rod 31 can move from a position far away from the vertical symmetry plane SP to a position close to the vertical symmetry plane SP; second axis B is acute angle setting with vertical symmetry plane SP, just fourth axis D is acute angle setting with vertical symmetry plane SP slider 4 when gliding, the lower extreme of upper right bracing piece 52 and the rear end of right lower bracing piece 32 can be followed the position of keeping away from vertical symmetry plane SP and removed to being close to vertical symmetry plane SP position. When the support frame is folded, the sliding part 4 is pushed to slide downwards on the connecting rod 2, and when the sliding part 4 slides downwards, the sliding part 4 drives the upper ends of the left upper supporting rod 51 and the right upper supporting rod 52 to slide downwards, so that the sliding part 4 is drawn towards the base, the left upper supporting rod 51 and the right upper supporting rod 52 are drawn towards the left lower supporting rod 31 and the right lower supporting rod 32, the connecting rod 2 rotates and draws towards the lower support frame 3, so that the support frame can be reduced in the height direction, the first axis A and the third axis C are arranged at acute angles with the vertical symmetry plane SP, and the second axis B and the fourth axis D are arranged at acute angles with the vertical symmetry plane SP, so that when the sliding part 4 slides downwards, the lower end of the left upper supporting rod 51 and the rear end of the left lower supporting rod 31 can move from the position far away from the vertical symmetry plane SP to the position close to the vertical symmetry plane SP, and simultaneously the lower end of the right upper supporting rod 52 and the rear end of the right lower supporting rod Move to being close to vertical symmetry plane SP position to make the support frame can reduce in width direction, the volume of the support frame after folding up reaches the minimizing, more portable and deposit, only need promote slider 4 and just can realize folding of folding leg, reduced folding connecting rod, make folding more convenient.

The support frame not only can be used for a baby carriage, but also can be used for vehicles such as pet cars and the like to carry articles, and has wider applicability.

As shown in fig. 1 to 4, the lower end of the left upper support rod 51 is rotatably connected to the rear end of the left lower support rod 31 about a fifth axis E, and the fifth axis E is disposed at an acute angle to the vertical symmetry plane SP; the lower end of the upper right support rod 52 is rotatably connected to the rear end of the lower right support rod 32 about a sixth axis F, and the sixth axis F is disposed at an acute angle to the vertical symmetry plane SP. The lower end of the left upper supporting rod 51 and the rear end of the left lower supporting rod 31 can be connected through a universal joint, so that the lower end of the left upper supporting rod 51 and the rear end of the left lower supporting rod 31 can rotate to move from a position far away from the vertical symmetry plane SP to a position close to the vertical symmetry plane SP; the lower end of the upper right support rod 52 and the rear end of the lower right support rod 32 may also be connected by a universal joint, so that the lower end of the upper right support rod 52 and the rear end of the lower right support rod 32 can rotate to move from a position away from the vertical symmetry plane SP to a position close to the vertical symmetry plane SP.

Example 2: as shown in fig. 5 to 18, a second aspect of the present invention provides an infant stroller having a vertical plane of symmetry SP and movable from a deployed position to a folded position after unlocking a locking device 6, comprising a support frame and a push rod assembly 7 connected to the support frame;

the support frame comprises a base 1 provided with a front wheel 11, a connecting rod 2 is connected to the base 1, a lower support frame 3 is further arranged on the base 1, the lower support frame 3 comprises a left lower support rod 31 and a right lower support rod 32 which are arranged on two sides of a vertical symmetry plane SP, the front end of the left lower support rod 31 is rotatably connected with the base 1 around a first axis A, the front end of the right lower support rod 32 is rotatably connected with the base 1 around a second axis B, a sliding part 4 capable of sliding relative to the connecting rod 2 is further arranged on the connecting rod 2, an upper support frame 5 capable of being drawn close to the left lower support rod 31 and the right lower support rod 32 when the sliding part 4 slides downwards relative to the connecting rod 2 is arranged between the sliding part 4 and the lower support frame 3, the upper support frame 5 comprises a left upper support rod 51 and a right upper support rod 52 which are arranged on two sides of the vertical symmetry plane SP, the upper end of the left upper support rod 51 is rotatably, the lower end of the left upper supporting rod 51 or the rear end of the left lower supporting rod 31 is connected with a left rear wheel 511, the rear end of the left lower supporting rod 31 is rotatably connected to the left upper supporting rod 51, the upper end of the right upper supporting rod 52 is rotatably connected with the sliding part 4 around a fourth axis D, the lower end of the right upper supporting rod 52 or the rear end of the right lower supporting rod 32 is connected with a right rear wheel 521, and the rear end of the right lower supporting rod 32 is rotatably connected to the right upper supporting rod 52;

the first axis a and the vertical symmetry plane SP are arranged at an acute angle, and the third axis C and the vertical symmetry plane SP are arranged at an acute angle, so that when the sliding member 4 slides downwards, the lower end of the left upper supporting rod 51 and the rear end of the left lower supporting rod 31 can move from a position far away from the vertical symmetry plane SP to a position close to the vertical symmetry plane SP; second axis B is acute angle setting with vertical symmetry plane SP, just fourth axis D is acute angle setting with vertical symmetry plane SP slider 4 when gliding, the lower extreme of upper right bracing piece 52 and the rear end of right lower bracing piece 32 can be followed the position of keeping away from vertical symmetry plane SP and removed to being close to vertical symmetry plane SP position.

When the infant stroller is folded, the sliding member 4 is pushed to slide downwards on the connecting rod 2, and when the sliding member 4 slides downwards, the sliding member 4 drives the upper ends of the left upper supporting rod 51 and the right upper supporting rod 52 to slide downwards, so that the sliding member 4 is drawn towards the base, the left upper supporting rod 51 and the right upper supporting rod 52 are drawn towards the left lower supporting rod 31 and the right lower supporting rod 32, the connecting rod 2 rotates and is drawn towards the lower supporting frame 3, so that the supporting frame can be reduced in the height direction, the first axis a and the third axis C are arranged at acute angles with the vertical symmetry plane SP, and the second axis B and the fourth axis D are arranged at acute angles with the vertical symmetry plane SP, so that when the sliding member 4 slides downwards, the lower end of the left upper supporting rod 51 and the rear end of the left lower supporting rod 31 can move from the position far away from the vertical symmetry plane SP to the position close to the vertical symmetry plane SP, and simultaneously, the lower end of the right upper supporting rod 52 and the rear end of the right The SP position is moved to the SP position close to the vertical symmetry plane, so that the support frame can be reduced in the width direction, the size of the folded infant handcart is minimized, the infant handcart is more convenient to carry and store, the folding of the folding frame can be realized only by pushing the sliding piece 4, the number of the folding connecting rods is reduced, and the folding is more convenient.

As shown in fig. 5 to 18, the lower end of the left upper supporting rod 51 is rotatably connected to the rear end of the left lower supporting rod 31 about a fifth axis E, and the fifth axis E is disposed at an acute angle to the vertical symmetry plane SP; the lower end of the upper right support rod 52 is rotatably connected to the rear end of the lower right support rod 32 about a sixth axis F, and the sixth axis F is disposed at an acute angle to the vertical symmetry plane SP. Of course, the lower end of the left upper support rod 51 and the rear end of the left lower support rod 31 can also be connected through a universal joint, so that the lower end of the left upper support rod 51 and the rear end of the left lower support rod 31 can rotate to move from a position far away from the vertical symmetry plane SP to a position close to the vertical symmetry plane SP; the lower end of the upper right support rod 52 and the rear end of the lower right support rod 32 may also be connected by a universal joint, so that the lower end of the upper right support rod 52 and the rear end of the lower right support rod 32 can rotate to move from a position away from the vertical symmetry plane SP to a position close to the vertical symmetry plane SP.

As shown in fig. 5 to 8, the push rod assembly 7 is sleeved on the connecting rod 2 and can slide relative to the connecting rod 2, and when sliding downward relative to the connecting rod 2, the push rod assembly 7 pushes the sliding member 4 to move closer to the base. The push rod assembly 7 is used for pushing the sliding part 4 to slide, so that the infant handcart is more convenient to fold.

As shown in fig. 5 to 8, the infant pushchair further comprises a seat assembly 9 provided between the push rod assembly 7 and the slider 4 and foldable when the push rod assembly 7 slides with respect to the connecting rod 2.

As shown in fig. 11, the push rod assembly 7 includes a lower push rod 71 slidably sleeved on the connecting rod 2, and a housing 81 is further sleeved on the lower push rod 71; the seat assembly 9 includes a seat 91 and a backrest 92 which can be rotated and folded with each other, a transmission rod 93 which can be rotatably connected with the seat 91 and the slider 4 is connected between the seat 91 and the slider 4, a lower end of the transmission rod 93 is rotatably connected with the slider 4 around a seventh axis G, an upper end of the transmission rod 93 is rotatably connected with the seat 91 around an eighth axis H, a rear side of the seat 91 is rotatably connected with the housing 81 around a ninth axis I, and a lower side of the backrest 92 is rotatably connected with the housing 81 around a tenth axis J. When the infant stroller is folded, the housing 81 slides downward relative to the connecting rod 2 along with the lower push rod 71, at this time, the distance between the sliding member 4 and the housing 81 is gradually reduced to rotate the rear side of the seat 91 around the ninth axis I, and when the rear side of the seat 91 rotates around the ninth axis I, the front side of the seat 91 rotates around the eighth axis H relative to the transmission rod 93, so that the seat 91 is drawn close to the backrest 92, the lower end of the transmission rod 93 rotates around the seventh axis G relative to the sliding member 4 to be drawn close to the seat 91, the seat 91 presses the backrest 92 against the backrest 92, so that the backrest 92 rotates around the tenth axis J to be drawn close to the housing 81, thereby completing folding of the whole seat assembly 9, and minimizing the volume of the seat assembly 9.

As shown in fig. 11, an elastic member 94 capable of restoring the backrest 92 is disposed between the housing 81 and the backrest 92; the seat 91 is provided with a first abutting surface 911, and the backrest 92 is provided with a second abutting surface 921 which abuts against the first abutting surface 911 when the seat assembly 9 is in the unfolded state. When the seat assembly 9 is in the unfolded state, the first abutting surface 911 and the second abutting surface 921 abut against each other, so that the seat 91 and the backrest 92 are fixed to each other. The elastic member 94 is a torsion spring. When the seat assembly 9 is unfolded, the elastic member 94 drives the backrest 92 to unfold until the first abutting surface 911 on the seat 91 and the second abutting surface 921 on the backrest 92 abut against each other, so that there is no fit clearance when the backrest 92 and the seat 91 are unfolded from each other, and the seat 91 and the backrest 92 are fixed to each other more stably.

As shown in fig. 5, a folding rod assembly 53 is disposed between the left upper support rod 51 and the right upper support rod 52, the folding rod assembly 53 includes a first support rod 531 rotatably connected to the left upper support rod 51 and a second support rod 532 rotatably connected to the right upper support rod 52, and the first support rod 531 and the second support rod 532 are rotatably connected. The first and second support bars 531 and 532 are used to support the left and right upper support bars 51 and 52 when the infant stroller is unfolded, so that the left and right upper support bars 51 and 52 are more stable when unfolded.

As shown in fig. 5 to 18, the push rod assembly 7 includes a lower push rod 71 slidably sleeved on the connecting rod 2, and the lower push rod 71 is provided with a locking device 8 for locking the lower push rod 71 on the connecting rod 2 and driving the locking device 6 to unlock when the lower push rod 71 slides downwards relative to the connecting rod 2. The locking device 8 and the locking device 6 are unlocked in a linkage mode, unlocking is more convenient and fast, and only the lower push rod 71 needs to be pushed, so that operation is convenient.

As shown in fig. 12 to 15, a first locking hole 22 is formed in the connecting rod 2, a second locking hole 711 is formed in the lower push rod 71, the locking device 8 includes a housing 81 sleeved on the lower push rod 71, a rotating button 82 capable of rotating relative to the housing 81 is formed in the housing 81, a locking tongue 83 capable of being engaged with the first locking hole 22 and the second locking hole 711 and being disengaged from the first locking hole 22 after the rotating button 82 is pressed is connected to the rotating button 82, and an elastic resetting element 84 capable of resetting the rotating button 82 is further arranged between the rotating button 82 and the housing 81. The resilient return element 84 is a torsion spring.

When the infant stroller needs to be folded, the rotating button 82 is pressed, the rotating button 82 rotates relative to the shell 81 to enable the bolt 83 to be separated from the first locking hole 22, at the moment, the lower push rod 71 can be pushed to slide downwards relative to the connecting rod 2, the locking device 6 is driven to be unlocked, the locking device 8 and the locking device 6 are unlocked in a linkage unlocking mode, unlocking is convenient, and unlocking operation is smooth. When the infant car needs to be unfolded, the lower push rod 71 is pushed to slide upward relative to the connecting rod 2 so that the second locking hole 711 is aligned with the first locking hole 22, and when the second locking hole 711 is aligned with the first locking hole 22, the elastic reset element 84 drives the latch 83 to reset, so that the latch 83 is inserted into the first locking hole 22, and the connecting rod 2 is fixed with the lower push rod 71.

As shown in fig. 12 and 16 to 18, the connecting rod 2 is provided with a first locking hole 23, the slider 4 is provided with a second locking hole 41, the locking device 6 includes a housing 61 connected to the slider 4, a bolt 62 that can engage with the first locking hole 23 and the second locking hole 41 and can be disengaged from the first locking hole 23 when sliding with respect to the housing 61 is provided in the housing 61, an operating member 63 that presses the bolt 62 to slide the bolt 62 when sliding is further provided in the housing 61, a returning member 64 that can return the bolt 62 is further provided between the bolt 62 and the housing 61, and a pressing portion 811 that can push the operating member 63 to slide when sliding with respect to the connecting rod 2 is further provided in the housing 81.

As shown in fig. 17 to 18, the latch 62 is provided with a first inclined surface 621, and the operating member 63 is provided with a second inclined surface 631 capable of pushing the latch 62 by cooperating with the first inclined surface 621 when the operating member 63 slides. When the infant stroller is folded, the housing 81 slides relative to the connecting rod 2 along with the push rod 71, the pressing part 811 presses the operating part 63 during sliding, so that the operating part 63 slides downward relative to the housing 61, the second inclined surface 631 on the operating part 63 cooperates with the first inclined surface 621 to push the latch 62, and the latch 62 is disengaged from the first locking hole 23, so that the sliding part 4 can slide relative to the connecting rod 2, and the left upper support rod 51 and the right upper support rod 52 are driven to move closer to the left lower support rod 31 and the right lower support rod 32. The reset member 64 is a spring. When the stroller is unfolded, the slider 4 is slid upward so that the second locking hole 41 is aligned with the first locking hole 23, and when the second locking hole 41 is aligned with the first locking hole 23, the latch 62 is pushed by the reset piece 64 to slide relative to the housing 61 and be inserted into the first locking hole 23, so that the slider 4 is fixed to the connecting rod 2, and the operation piece 63 is pushed by the latch 62 to be slid upward and reset.

As shown in fig. 12 to 13, a positioning sleeve 21 is further disposed between the lower push rod 71 and the connecting rod 2, the upper end of the positioning sleeve 21 is fixed on the connecting rod 2, and a positioning hole 211 through which the lock tongue 83 can pass is further disposed on the positioning sleeve 21. The latch 83 sequentially penetrates through the second locking hole 711, the positioning hole 211 and the first locking hole 22 from right to left, and the positioning sleeve 21 enables the lower push rod 71 and the connecting rod 2 to be more stable when being clamped with the latch 83.

As shown in fig. 5 to 12, the push rod assembly 7 further includes a push rod 72 rotatably connected to the lower push rod 71. A locking device is further arranged between the lower push rod 71 and the hand push rod 72, so that the hand push rod 72 can be fixed relative to the lower push rod 71 when in use, and the locking device is unlocked when the infant handcart is folded, so that the hand push rod 72 can rotate relative to the lower push rod 71 and draw close to the push rod 71, and the folding volume is reduced.

Claims

1. A support frame having a vertical plane of Symmetry (SP) and being movable from an unfolded position to a folded position, characterized in that: comprises a base (1), a connecting rod (2) is connected on the base (1), a lower support frame (3) is further arranged on the base (1), the lower support frame (3) comprises a left lower support rod (31) and a right lower support rod (32) which are arranged on two sides of a vertical Symmetrical Plane (SP), the front end of the left lower support rod (31) is rotatably connected with the base (1) around a first axis (A), the front end of the right lower support rod (32) is rotatably connected with the base (1) around a second axis (B), a sliding part (4) capable of sliding relative to the connecting rod (2) is further arranged on the connecting rod (2), an upper support frame (5) capable of being drawn close to the left lower support rod (31) and the right lower support rod (32) when the sliding part (4) relative to the connecting rod (2) downwards is arranged between the sliding part (4) and the lower support frame (3), the upper support frame (5) comprises a left upper support rod (51) and a right upper support rod (52) which are arranged on two sides of the, the upper end of the left upper supporting rod (51) is rotatably connected with the sliding part (4) around a third axis (C), the rear end of the left lower supporting rod (31) is rotatably connected to the left upper supporting rod (51), the upper end of the right upper supporting rod (52) is rotatably connected with the sliding part (4) around a fourth axis (D), and the rear end of the right lower supporting rod (32) is rotatably connected to the right upper supporting rod (52);

the first axis (A) and the vertical Symmetry Plane (SP) are arranged in an acute angle mode, the third axis (C) and the vertical Symmetry Plane (SP) are arranged in an acute angle mode, and when the sliding piece (4) slides downwards, the lower end of the left upper supporting rod (51) and the rear end of the left lower supporting rod (31) can move from a position far away from the vertical Symmetry Plane (SP) to a position close to the vertical Symmetry Plane (SP);

second axis (B) is the acute angle setting with vertical plane of Symmetry (SP), just fourth axis (D) is the acute angle setting with vertical plane of Symmetry (SP) slider (4) when gliding, the lower extreme of upper right bracing piece (52) and the rear end of right lower support bar (32) can be followed the position of keeping away from vertical plane of Symmetry (SP) and removed to being close to vertical plane of Symmetry (SP) position.

2. The support bracket of claim 1, wherein: the lower end of the left upper supporting rod (51) is rotatably connected with the rear end of the left lower supporting rod (31) around a fifth axis (E), and the lower end of the left upper supporting rod and the rear end of the left lower supporting rod are arranged around the fifth axis (E) and form an acute angle with a vertical Symmetry Plane (SP);

the lower end of the right upper supporting rod (52) is rotatably connected with the rear end of the right lower supporting rod (32) around a sixth axis (F), and the sixth axis (F) and the vertical Symmetry Plane (SP) are arranged in an acute angle mode.

3. Infant pushchair having a vertical plane of Symmetry (SP) and being movable from a deployed position to a folded position after unlocking a locking device (6), characterized in that: comprises a supporting frame and a push rod component (7) connected with the supporting frame;

the support frame comprises a base (1) provided with a front wheel (11), a connecting rod (2) is connected onto the base (1), a lower support frame (3) is further arranged on the base (1), the lower support frame (3) comprises a left lower support rod (31) and a right lower support rod (32) which are arranged on two sides of a vertical Symmetry Plane (SP), the front end of the left lower support rod (31) is rotatably connected with the base (1) around a first axis (A), the front end of the right lower support rod (32) is rotatably connected with the base (1) around a second axis (B), a sliding part (4) capable of sliding relative to the connecting rod (2) is further arranged on the connecting rod (2), an upper support frame (5) capable of drawing close the left lower support rod (31) and the right lower support rod (32) when the sliding part (4) relative to the connecting rod (2) downwards is arranged between the sliding part (4) and the lower support frame (3), the upper support frame (5) comprises a left upper support rod (51) and a right upper support rod (52) which are arranged on two sides of a vertical Symmetry Plane (SP), the upper end of the left upper support rod (51) is rotatably connected with the sliding part (4) around a third axis (C), the lower end of the left upper support rod (51) or the rear end of the left lower support rod (31) is connected with a left rear wheel (511), the rear end of the left lower support rod (31) is rotatably connected with the left upper support rod (51), the upper end of the right upper support rod (52) is rotatably connected with the sliding part (4) around a fourth axis (D), the lower end of the right upper support rod (52) or the rear end of the right lower support rod (32) is connected with a right rear wheel (521), and the rear end of the right lower support rod (32) is rotatably connected with the right upper support rod (52);

4. The infant stroller of claim 3, wherein: the lower end of the left upper supporting rod (51) is rotatably connected with the rear end of the left lower supporting rod (31) around a fifth axis (E), and the lower end of the left upper supporting rod and the rear end of the left lower supporting rod are arranged around the fifth axis (E) and form an acute angle with a vertical Symmetry Plane (SP);

5. The infant stroller of claim 3, wherein: the push rod component (7) is sleeved on the connecting rod (2) and can slide relative to the connecting rod (2), and when the push rod component (7) slides downwards relative to the connecting rod (2), the push rod component (7) pushes the sliding part (4) to be close to the base.

6. An infant pushchair according to claim 3 or 4 or 5, wherein: the infant handcart also comprises a seat assembly (9) which is arranged between the push rod assembly (7) and the sliding piece (4) and can be folded when the push rod assembly (7) slides relative to the connecting rod (2).

7. The infant stroller of claim 6, wherein: the push rod assembly (7) comprises a lower push rod (71) which is slidably sleeved on the connecting rod (2), and a shell (81) is further sleeved on the lower push rod (71);

the seat assembly (9) comprises a seat (91) and a backrest (92) which can rotate mutually and can be folded, a transmission rod (93) which can be rotationally connected with the seat (91) and the sliding piece (4) is connected between the seat (91) and the sliding piece (4), the lower end of the transmission rod (93) is rotationally connected with the sliding piece (4) around a seventh axis (G), the upper end of the transmission rod (93) is rotationally connected with the seat (91) around an eighth axis (H), the rear side of the seat (91) is rotationally connected with the shell (81) around a ninth axis (I), and the lower side of the backrest (92) is rotationally connected with the shell (81) around a tenth axis (J).

8. The infant stroller of claim 7, wherein: an elastic piece (94) which can enable the backrest (92) to reset is arranged between the shell (81) and the backrest (92);

the seat assembly is characterized in that a first abutting surface (911) is arranged on the seat (91), and a second abutting surface (921) which abuts against the first abutting surface (911) when the seat assembly (9) is in an unfolded state is arranged on the backrest (92).

9. The infant stroller of claim 3, wherein: be equipped with folding rod subassembly (53) between upper left bracing piece (51) and upper right bracing piece (52), folding rod subassembly (53) are connected in first bracing piece (531) on upper left bracing piece (51) and second bracing piece (532) of upper right bracing piece (52) including rotating, just first bracing piece (531) rotate with second bracing piece (532) and are connected.

10. The infant stroller of claim 3, wherein: the push rod assembly (7) comprises a lower push rod (71) which is slidably sleeved on the connecting rod (2), and a locking device (8) which is used for locking the lower push rod (71) on the connecting rod (2) and can drive the locking device (6) to unlock when the lower push rod (71) slides downwards relative to the connecting rod (2) is arranged on the lower push rod (71).