CN209938700U - Single-hand unlocking and folding mechanism applied to double-seat baby carriage and double-seat baby carriage - Google Patents

Abstract

The application discloses be applied to one-hand unblock receipts car mechanism on double seat bassinet, including hand push support, upper right connecting rod, lower right connecting rod, upper left connecting rod, lower left connecting rod, middle and upper connecting rod, lower right connecting rod, right kayser subassembly, right locking joint, left kayser subassembly, left locking joint, middle locking joint and unblock subassembly. This application is applied to one-hand unblock receipts car mechanism on double-seater bassinet and passes through unblock subassembly with right locking joint right side kayser subassembly a left side locking joint a left side kayser subassembly reaches well locking joint is connected in order to realize synchronous unblock right side locking joint a right side kayser subassembly a left side locking joint a left side kayser subassembly reaches well locking joint to reach the purpose of one-hand unblock handcart, and then the action of the folding receipts car that can significantly reduce reaches the purpose of conveniently receiving the car. The application also discloses a double-seat baby carriage.

Description

Single-hand unlocking and folding mechanism applied to double-seat baby carriage and double-seat baby carriage

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of baby carriers, in particular to a one-hand unlocking and folding mechanism applied to a double-seat baby carrier and the double-seat baby carrier.

[ background of the invention ]

The baby stroller is a tool stroller designed to facilitate outdoor activities of babies, and is increasingly popularized in daily life of people along with the continuous improvement of the living standard of people.

At present, besides the production enterprises pursue the basic requirements of stability, safety and the like of the baby stroller, the production enterprises also pay more and more attention to the characteristics of folded volume, fast folding and the like of the baby stroller, and then in order to meet the requirements of volume reduction and fast folding, the existing baby stroller is complex in structure, can be folded by multiple unlocking actions and cannot be unlocked and folded by one hand.

[ Utility model ] content

The above-mentioned prior art problem that this application will be solved to be directed to provides a one hand unblock mechanism of receiving on being applied to double seat bassinet.

In order to solve the technical problem, the method is realized by the following technical scheme:

be applied to one-hand unblock receipts car mechanism on two bassinets, include the hand push support, locate hand push support right side downside upper right connecting rod, locate upper right connecting rod downside, locate hand push support left side downside upper left connecting rod, locate upper left connecting rod downside left side lower connecting rod, locate upper right connecting rod with last connecting rod in between the upper left connecting rod, locate under the right side connecting rod with be located between the lower left connecting rod middle and lower connecting rod of connection is dismantled to last connecting rod downside and with last connecting rod, and still include:

the right clamping and locking assembly is arranged between the right lower connecting rod and the right upper connecting rod and is used for connecting and clamping the right upper connecting rod;

the right locking joint is arranged between the right upper connecting rod and the right lower side of the hand-push bracket;

the left locking assembly is arranged between the left lower connecting rod and the left upper connecting rod and used for connecting and locking the left upper connecting rod;

the left locking joint is arranged between the left upper connecting rod and the left lower side of the hand-push bracket;

the middle locking joint is arranged between the middle upper connecting rod and the middle part of the hand-push bracket;

the unlocking assembly is arranged on the upper side of the middle of the hand-push support, the right side of the unlocking assembly is connected with the right locking joint and the right locking joint, the left side of the unlocking assembly is connected with the left locking joint and the middle locking joint, and the lower side of the unlocking assembly is connected with the middle locking joint and used for synchronously unlocking the right locking joint, the left locking joint and the middle locking joint.

The single-hand unlocking and folding mechanism applied to the double-seat baby carriage comprises:

the button seat is arranged in the middle of the upper side of the hand-push bracket;

the unlocking button is arranged on the button seat in a telescopic sliding mode;

the safety locking button is arranged on the button seat and is positioned on the upper side of the unlocking button;

the transverse elastic reset piece is arranged between the safety locking button and the button seat which are transversely arranged and used for transversely and elastically resetting the safety locking button so as to enable the safety locking button to limit and lock the unlocking button;

the right connecting unlocking rope is provided with a right connecting end, a right second connecting end and a right third connecting end, the right connecting end is connected with the right side of the unlocking button, the right second connecting end penetrates into the right side of the hand-push bracket and extends to be connected with the right locking joint, and the right third connecting end sequentially penetrates through the right side of the hand-push bracket and the right locking joint, extends into the right upper connecting rod and extends to be connected with the right locking assembly;

the left connecting and unlocking rope is provided with a left connecting end, a left connecting end and a left connecting end, the left connecting end is connected with the left side of the unlocking button, the left connecting end penetrates into the left side of the hand-push bracket and extends to be connected with the left locking joint, and the left connecting end sequentially penetrates through the left side of the hand-push bracket and the left locking joint, extends into the left upper connecting rod and extends to be connected with the left locking assembly;

and the upper end of the middle connecting unlocking rope is connected with the lower side of the unlocking button, and the lower end of the middle connecting unlocking rope extends into the inner side of the middle part of the hand-push support and extends to be connected with the middle locking joint.

The single-hand unlocking and folding mechanism applied to the double-seat baby carriage comprises the right locking joint and a left locking joint, wherein the right locking joint comprises:

the lower end of the right lower connecting piece is clamped at the upper end of the right upper connecting rod, and the upper end of the right lower connecting piece is provided with a right tooth socket;

the upper end of the right upper connecting piece is clamped at the right lower end of the hand-push bracket and is coaxially hinged with the right lower connecting piece, and the lower end of the right upper connecting piece is provided with two right tooth sockets;

the right clamping gear is arranged between the right tooth groove and the right tooth groove, can be matched with the right tooth groove and the right tooth groove, and is provided with a plurality of right slope bosses along the circumferential direction;

the right rotating pulley is arranged between the right first tooth groove and the right latch gear, is connected with the right second connecting end, and is provided with a plurality of right second slope bosses which can be matched with the right first slope bosses along the circumferential direction, when the right second connecting end pulls the right rotating pulley to rotate, the right second slope bosses push the right first slope bosses so that the right latch gear moves from the right first tooth groove to the right second tooth groove, and the right locking joint is unlocked;

and the right reset elastic piece is arranged between the right clamping gear and the right two tooth grooves and used for elastically resetting the right clamping gear to move into the right tooth groove so as to lock the right locking joint.

The one-hand unlocking and folding mechanism applied to the double-seat baby carriage comprises the right latch assembly and a locking mechanism, wherein the locking mechanism comprises:

the right clamping connection seat is arranged on the right lower connecting rod;

the right clamping pin is sleeved in the lower end of the right upper connecting rod, the lower end of the right clamping pin can be clamped in the right clamping connecting seat, the upper end of the right clamping pin is connected with the right three connecting ends, and when the right three connecting ends pull the right clamping pin to contract upwards to move so as to separate the right clamping connecting seat, the right upper connecting rod can be unlocked;

the right two-reset elastic piece is sleeved at the upper end of the right clamping pin, is penetrated through by the right three-connecting end and is used for elastically resetting the lower end of the right clamping pin to be clamped in the right clamping connecting seat so as to lock the right upper connecting rod;

and the lower end of the right linkage hinge is hinged to the upper side of the right lower connecting rod, and the upper end of the right linkage hinge is hinged to the lower side of the right upper connecting rod and used for linkage hinge joint of the right upper connecting rod.

The single-hand unlocking and folding mechanism applied to the double-seat baby carrier is characterized in that the right bayonet lock is provided with a right limiting through hole for limiting upward contraction and movement.

The single-hand unlocking and folding mechanism applied to the double-seat baby carriage is characterized in that the right first reset elastic piece is a tower spring, and the right second reset elastic piece is a pressure spring.

The single-hand unlocking and folding mechanism applied to the double-seat baby carriage is characterized in that the number of the right slope bosses and the number of the right slope bosses are 3.

The single-hand unlocking and folding mechanism applied to the double-seat baby carriage further comprises:

the lower end of the middle-right linkage hinge is hinged to the right side of the upper end of the middle lower connecting rod, and the upper end of the middle-right linkage hinge is hinged to the right side of the lower end of the middle upper connecting rod;

and the lower end of the middle left linkage hinged part is hinged to the left side of the upper end of the middle lower connecting rod, and the upper end of the middle left linkage hinged part is hinged to the left side of the lower end of the middle upper connecting rod and is matched with the middle right linkage hinged part to be hinged with the middle upper connecting rod in a linkage manner.

The application also provides a double-seat baby carriage which comprises the single-hand unlocking and folding mechanism applied to the double-seat baby carriage.

The double-seat baby carrier further comprises a left seat arranged between the right upper connecting rod and the middle and upper connecting rod, and a right seat arranged between the left upper connecting rod and the middle and upper connecting rod.

Compared with the prior art, the application has the following advantages:

1. this application is applied to one-hand unblock receipts car mechanism on double-seater bassinet and passes through unblock subassembly with right locking joint right side kayser subassembly a left side locking joint a left side kayser subassembly reaches well locking joint is connected in order to realize unblock in step right side locking joint a right side kayser subassembly a left side locking joint a left side kayser subassembly reaches well locking joint to can reach the purpose of one-hand unblock handcart, and then the action of the folding receipts car that can significantly reduce reaches the purpose of conveniently receiving the car.

2. The single-hand unlocking and folding mechanism applied to the double-seat baby carriage is simple in structure and convenient to operate.

[ description of the drawings ]

Fig. 1 is a perspective view of a tandem stroller of the present application.

Fig. 2 is a schematic diagram of the left connecting unlocking rope, the middle connecting unlocking rope and the right connecting unlocking rope respectively penetrating through the double-seat baby carriage.

FIG. 3 is a perspective view of the release assembly of the present stroller with a portion of the button nest hidden.

Fig. 4 is a perspective view of the right locking knuckle of the tandem stroller of the present application.

FIG. 5 is an exploded view of the right locking joint described in the tandem stroller of the present application.

FIG. 6 is an exploded view of the right latch assembly of the tandem stroller of the present application with the right linkage hinge hidden.

Fig. 7 is a perspective view of the lower link of the tandem stroller of the present application.

Fig. 8 is a perspective view of the upper attachment member of the tandem stroller of the present application.

FIG. 9 is a perspective view of the latch gear of the dual seater stroller of the present application.

Fig. 10 is a perspective view of the rotatable block of the tandem stroller of the present application.

Fig. 11 is a rear partial perspective view of the tandem stroller of the present application.

[ detailed description ] embodiments

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.

As shown in fig. 1 to 11, the single-hand unlocking and folding mechanism applied to a double-seat stroller includes a push bracket 100, a right upper connecting rod 200, a right lower connecting rod 300, a left upper connecting rod 400, a left lower connecting rod 500, an upper middle connecting rod 600, a middle lower connecting rod 700, a right latch assembly 1, a right locking joint 2, a left latch assembly 3, a left locking joint 4, a middle locking joint 5, and an unlocking assembly 6.

Specifically, the right upper connecting rod 200 is disposed at the lower right side of the hand push bracket 100. The right lower link 300 is provided at the lower side of the right upper link 200. The left upper link 400 is provided at the left lower side of the hand push bracket 100. The left lower link 500 is provided at the lower side of the left upper link 400. The upper-middle link 600 is disposed between the upper-right link 200 and the upper-left link 400. The middle lower link 700 is disposed between the right lower link 300 and the left lower link 500, is located at the lower side of the middle upper link 600, and is detachably connected to the middle upper link 600. The right locking assembly 1 is arranged between the right lower connecting rod 300 and the right upper connecting rod 200 and is used for connecting and locking the right upper connecting rod 200. The right locking joint 2 is disposed between the right upper connecting rod 200 and the lower right side of the hand push bracket 100. The left locking assembly 3 is disposed between the left lower connecting rod 500 and the left upper connecting rod 400 for connecting and locking the left upper connecting rod 400. The left locking joint 4 is disposed between the left upper connecting rod 400 and the left lower side of the hand push bracket 100. The middle locking joint 5 is arranged between the middle upper connecting rod 600 and the middle part of the hand-push support 100. The unlocking assembly 6 is arranged on the upper side of the middle of the hand-push support 100, the right side of the unlocking assembly is connected with the right locking joint 2 and the right locking joint 1, the left side of the unlocking assembly is connected with the left locking joint 4 and the left locking joint 3, the lower side of the unlocking assembly is connected with the middle locking joint 5, and the unlocking assembly is used for synchronously unlocking the right locking joint 2, the right locking joint 1, the left locking joint 4, the left locking joint 3 and the middle locking joint 5.

This application is applied to one-hand unblock receipts car mechanism on double-seater bassinet and passes through unblock subassembly 6 with right locking joint 2 right side kayser subassembly 1 left side locking joint 4 left side kayser subassembly 3 reaches well locking joint 5 is connected in order to realize the unblock in step right side locking joint 2 right side kayser subassembly 1 left side locking joint 4 left side kayser subassembly 3 reaches well locking joint 5 to can reach the purpose of one-hand unblock handcart, and then the folding action of receiving the car that can significantly reduce reaches the purpose of conveniently receiving the car.

The unlocking assembly 6 comprises a button seat 61, an unlocking button 62, a safety locking button 63, a transverse elastic resetting piece, a right connecting unlocking rope 64, a left connecting unlocking rope 65 and a middle connecting unlocking rope 66. The button seat 61 is disposed at the middle of the upper side of the hand push bracket 100. The unlocking button 62 is telescopically and slidably arranged on the button seat 61. The safety locking button 63 is disposed on the button seat 61 and located above the unlocking button 62. The transverse elastic reset piece is arranged between the safety locking button 63 and the button seat 61, and is used for transversely and elastically resetting the safety locking button 63 so as to enable the safety locking button 63 to limit and lock the unlocking button 62. The right connecting and unlocking rope 64 is provided with a right connecting end, a right second connecting end and a right third connecting end, the right connecting end is connected with the right side of the unlocking button 62, the right second connecting end penetrates into the right side of the hand-push support 100 and extends to be connected with the right locking joint 2, and the right third connecting end sequentially penetrates through the right side of the hand-push support 100 and the right locking joint 2, then extends into the upper right connecting rod 200 and extends to be connected with the right locking assembly 1. The left connecting and unlocking rope 65 is provided with a left connecting end, a left connecting end and a left connecting end, the left connecting end is connected with the left side of the unlocking button 62, the left connecting end penetrates into the left side of the hand-push support 100 and extends to be connected with the left locking joint 4, and the left connecting end sequentially penetrate through the left side of the hand-push support 100 and the left locking joint 4 and then extend into the left upper connecting rod 400 and extend to be connected with the left locking assembly 3. The upper end of the middle connecting unlocking rope 66 is connected with the lower side of the unlocking button 62, and the lower end of the middle connecting unlocking rope extends into the inner side of the middle part of the hand-push support 100 and extends to be connected with the middle locking joint 5. The purpose of the unlocking mechanism is to synchronously unlock the right locking joint 2, the right locking assembly 1, the left locking joint 4, the left locking assembly 3 and the middle locking joint 5 when the unlocking button 62 is pressed.

The right locking joint 2 comprises a right lower connecting piece 21, a right upper connecting piece 22, a right locking gear 23, a right rotating pulley 24 and a right reset elastic piece 25. The lower end of the right lower connecting piece 21 is clamped at the upper end of the right upper connecting rod 200, and the upper end of the right lower connecting piece is provided with a right tooth groove 211. The upper end of the right upper connecting piece 22 is clamped at the right lower end of the hand-push bracket 100 and is coaxially hinged with the right lower connecting piece 21, and the lower end of the right upper connecting piece is provided with a right two-tooth groove 221. The right latch gear 23 is disposed between the right first tooth groove 211 and the right second tooth groove 221, and can be adapted to the right first tooth groove 211 and the right second tooth groove 221, and a plurality of right slope bosses 231 are disposed thereon along the circumferential direction thereof. The right rotating pulley 24 is disposed between the right tooth groove 211 and the right latch gear 23, and is connected to the right two connecting ends, and a plurality of right two slope bosses 241 capable of matching with the right one slope boss 231 are disposed on the right rotating pulley 24 along the circumferential direction, and when the right two connecting ends pull the right rotating pulley 24 to rotate, the right two slope bosses 241 push the right one slope boss 231 to move the right latch gear 23 from the right one tooth groove 211 to the right two tooth grooves 221, so as to unlock the right locking joint 2. The right reset elastic member 25 is disposed between the right latch gear 23 and the right tooth groove 221 for elastically resetting the right latch gear 23 to move into the right tooth groove 211 to lock the right locking joint 2.

The number of the right slope bosses 231 and the right slope bosses 241 is 3. The purpose of the present invention is to push the right latch gear 23 from the right tooth groove 211 to the right tooth groove 221 uniformly and stably.

The right restoring elastic member 25 is a tower spring, which has an advantage in that the tower spring not only has a large load but also has a large contact area.

The right locking joint 2 further comprises a right locking mechanism 26 arranged between the rear side of the right lower connecting piece 21 and the rear side of the right upper connecting piece 22. The right locking mechanism 26 includes a right locking boss 261, a right inclined recess 262, and a right locking recess 263. The right locking boss 261 is provided at the rear side of the right lower link 21. The right inclined concave part 262 is disposed at the rear side of the right upper connecting member 22 and at the same side as the right locking protrusion 261. The right locking groove 263 is disposed on the right upper connecting member 22, is located at the front side of the right inclined concave 261, and can be matched with the right locking protrusion 261. When the right lower connecting piece 21 and the right upper connecting piece 22 are rotated and folded in opposite directions, the right locking boss 261 contacts with the right inclined concave 262 and moves into the right locking groove 263 along the inclined direction of the right inclined concave 262. Its advantage lies in passing through right locking mechanical system 26 can make the whole car after folding be in firm state, prevents loosely and occupy the placement space, and then embodies practicality and the suitability that this application has height greatly.

Of course, the structural features of the left locking joint 4 and the middle locking joint 5 are the same as those of the right locking joint 2, and the three are all located at the same height position, so that the rotation unfolding or folding action is convenient to perform.

The right clamping and locking assembly 1 comprises a right clamping and connecting seat 11, a right clamping pin 12, a right two-reset elastic piece 13 and a right linkage hinge piece 14. The right clamping connection seat 11 is arranged on the right lower connecting rod 300. The right bayonet lock 12 is sleeved inside the lower end of the upper right connecting rod 200, the lower end of the right bayonet lock can be connected with the inside of the right clamping connecting seat 11, the upper end of the right bayonet lock is connected with the right tri-connecting end, and when the right tri-connecting end pulls the right bayonet lock 12 to shrink upwards to move so as to separate the right clamping connecting seat 11, the right upper connecting rod 200 can be unlocked. The right two reset elastic piece 13 is sleeved at the upper end of the right clamping pin 12 and is penetrated by the right three connecting ends to elastically reset the lower end of the right clamping pin 12 is clamped in the right clamping connecting seat 11 to lock the right upper connecting rod 200. The lower end of the right linkage hinge 14 is hinged to the upper side of the right lower connecting rod 300, and the upper end thereof is hinged to the lower side of the right upper connecting rod 200, so as to be hinged to the right upper connecting rod 200 in a linkage manner. The right locking assembly 1 has the outstanding characteristics of simple structure and convenience in operation, and further can be used for further facilitating the unlocking and folding operation of the whole vehicle.

The right bayonet lock 12 is provided with a right limiting through hole 121 for limiting the upward shrinkage movement. The right limiting through hole 121 is used for limiting the moving distance of the right bayonet 12 which is contracted upwards, and simultaneously preventing the right bayonet 12 from being out of position.

The right two-reset elastic piece 13 is a pressure spring. The purpose of which is to meet the design requirements of the present application.

Of course, the structural features of the left latch assembly 3 and the right latch assembly 1 are the same, and both are located at the same height position, so as to facilitate the rotation and unfolding or folding actions.

The single-hand unlocking folding mechanism applied to the double-seat baby carriage further comprises a middle right linkage hinge 800 and a middle left linkage hinge 900. The lower end of the middle right linkage hinge 800 is hinged to the right side of the upper end of the middle lower connecting rod 700, and the upper end thereof is hinged to the right side of the lower end of the middle upper connecting rod 600. The lower end of the middle left linkage hinge 900 is hinged to the left side of the upper end of the middle lower connecting rod 700, and the upper end thereof is hinged to the left side of the lower end of the middle upper connecting rod 600, so as to cooperate with the middle right linkage hinge 800 to hinge the middle upper connecting rod 600 in a linkage manner. The advantage is that the middle and lower connecting rods 700 are conveniently positioned and clamped in a linkage manner.

The application also provides a double-seat baby carrier, which comprises the single-hand unlocking and folding mechanism applied to the double-seat baby carrier, the left seat 10a arranged between the right upper connecting rod 200 and the middle and upper connecting rod 600, and the right seat 20a arranged between the left upper connecting rod 400 and the middle and upper connecting rod 600. It would be advantageous to provide a dual seat to meet the needs of a dual stroller.

As described above, the embodiments of the present application have been described in detail, but the present application is not limited to the above embodiments. Even if various changes are made in the present application, the protection scope of the present application is still included.

Claims (10)

1. Be applied to one-hand unblock receipts car mechanism on two bassinets, include hand push support (100), locate hand push support (100) right side downside on upper right connecting rod (200), locate right side lower connecting rod (300) of upper right connecting rod (200) downside, locate hand push support (100) left side downside on upper left connecting rod (400), locate left side upper left connecting rod (400) downside on lower connecting rod (500), locate right side upper connecting rod (200) with middle and upper connecting rod (600) between left side upper connecting rod (400), locate right side lower connecting rod (300) with between left side lower connecting rod (500) and be located middle and upper connecting rod (600) downside and with middle and lower connecting rod (700) of middle and upper connecting rod (600) dismantlement connection, its characterized in that, the one-hand unblock receipts car mechanism of being applied to on two bassinets still includes:

the right clamping and locking assembly (1) is arranged between the right lower connecting rod (300) and the right upper connecting rod (200) and is used for connecting and clamping the right upper connecting rod (200);

a right locking joint (2) arranged between the right upper connecting rod (200) and the right lower side of the hand-push bracket (100);

the left locking assembly (3) is arranged between the left lower connecting rod (500) and the left upper connecting rod (400) and is used for connecting and locking the left upper connecting rod (400);

a left locking joint (4) arranged between the left upper connecting rod (400) and the left lower side of the hand-push bracket (100);

the middle locking joint (5) is arranged between the middle part of the middle upper connecting rod (600) and the middle part of the hand-push bracket (100);

the unlocking assembly (6) is arranged on the upper side of the middle of the hand-push support (100), the right side of the unlocking assembly is connected with the right locking joint (2) and the right locking joint (1), the left side of the unlocking assembly is connected with the left locking joint (4) and the left locking joint (3), the lower side of the unlocking assembly is connected with the middle locking joint (5) and used for synchronously unlocking the right locking joint (2), the right locking joint (1), the left locking joint (4), the left locking joint (3) and the middle locking joint (5).

2. The one-hand unlocking and folding mechanism applied to the double-seat baby carriage as claimed in claim 1, wherein: the unlocking assembly (6) comprises:

a button seat (61) arranged at the middle part of the upper side of the hand-push bracket (100);

an unlocking button (62) which is telescopically and slidably arranged on the button seat (61);

a safety locking button (63) which is arranged on the button seat (61) and is positioned on the upper side of the unlocking button (62);

the transverse elastic resetting piece is arranged between the safety locking button (63) and the button seat (61) which are transversely arranged and used for transversely and elastically resetting the safety locking button (63) so as to enable the safety locking button (63) to limit and lock the unlocking button (62);

the right connecting and unlocking rope (64) is provided with a right connecting end, a right second connecting end and a right third connecting end, the right connecting end is connected with the right side of the unlocking button (62), the right second connecting end penetrates into the right side of the hand-push support (100) and extends to be connected with the right locking joint (2), and the right third connecting end sequentially penetrates through the right side of the hand-push support (100) and the right locking joint (2) and then extends into the right upper connecting rod (200) and extends to be connected with the right locking assembly (1);

the left connecting and unlocking rope (65) is provided with a left connecting end, a left connecting end and a left connecting end, the left connecting end is connected with the left side of the unlocking button (62), the left connecting end penetrates into the left side of the hand-push support (100) and extends to be connected with the left locking joint (4), and the left connecting end, the left connecting end and the left locking joint (4) sequentially penetrate through the left side of the hand-push support (100) and extend into the left upper connecting rod (400) and extend to be connected with the left locking assembly (3);

and the upper end of the middle connecting unlocking rope (66) is connected with the lower side of the unlocking button (62), and the lower end of the middle connecting unlocking rope extends into the inner side of the middle part of the hand-push support (100) and extends to be connected with the middle locking joint (5).

3. The one-hand unlocking and folding mechanism applied to the double-seat baby carriage as claimed in claim 2, wherein: the right locking joint (2) comprises:

the lower end of the right lower connecting piece (21) is clamped at the upper end of the right upper connecting rod (200), and the upper end of the right lower connecting piece is provided with a right tooth groove (211);

the upper end of the right upper connecting piece (22) is clamped at the right lower end of the hand-push bracket (100) and is coaxially hinged with the right lower connecting piece (21), and the lower end of the right upper connecting piece is provided with two right tooth grooves (221);

the right clamping gear (23) is arranged between the right first tooth groove (211) and the right second tooth groove (221), can be matched with the right first tooth groove (211) and the right second tooth groove (221), and is provided with a plurality of right slope bosses (231) along the circumferential direction;

the right rotating pulley (24) is arranged between the right first tooth groove (211) and the right clamping gear (23), is connected with the right two connecting ends, and is provided with a plurality of right two slope bosses (241) which can be matched with the right first slope boss (231) along the circumferential direction, when the right connecting ends pull the right rotating pulley (24) to rotate, the right two slope bosses (241) push the right first slope boss (231) to enable the right clamping gear (23) to move from the right first tooth groove (211) to the right two tooth grooves (221), so that the right locking joint (2) is unlocked;

and the right reset elastic piece (25) is arranged between the right latch gear (23) and the right two tooth grooves (221) and is used for elastically resetting that the right latch gear (23) moves into the right tooth groove (211) to lock the right locking joint (2).

4. The one-hand unlocking and folding mechanism applied to the double-seat baby carriage as claimed in claim 3, wherein: the right latch assembly (1) comprises:

the right clamping connection seat (11) is arranged on the right lower connecting rod (300);

the right clamping pin (12) is sleeved inside the lower end of the right upper connecting rod (200), the lower end of the right clamping pin can be clamped inside the right clamping connecting seat (11), the upper end of the right clamping pin is connected with the right three-connecting end, and when the right three-connecting end pulls the right clamping pin (12) to contract upwards to move so as to separate the right clamping connecting seat (11), the right upper connecting rod (200) can be unlocked;

the right two-reset elastic piece (13) is sleeved at the upper end of the right clamping pin (12), is penetrated by the right three-connecting end and is used for elastically resetting the lower end of the right clamping pin (12) to be clamped in the right clamping connecting seat (11) so as to lock the right upper connecting rod (200);

and the lower end of the right linkage hinge part (14) is hinged to the upper side of the right lower connecting rod (300), and the upper end of the right linkage hinge part is hinged to the lower side of the right upper connecting rod (200) and used for linkage hinge of the right upper connecting rod (200).

5. The one-hand unlocking and folding mechanism applied to the double-seat baby carriage as claimed in claim 4, wherein: and a right limiting through hole (121) for limiting the upward shrinkage movement is formed in the right clamping pin (12).

6. The one-hand unlocking and folding mechanism applied to the double-seat baby carriage as claimed in claim 4, wherein: the right reset elastic piece (25) is a tower spring, and the right reset elastic piece (13) is a compression spring.

7. The one-hand unlocking and folding mechanism applied to the double-seat baby carriage as claimed in claim 3, wherein: the number of the right slope bosses (231) and the number of the right slope bosses (241) are both 3.

8. The one-hand unlocking and folding mechanism applied to the double-seat baby carriage as claimed in claim 1, wherein: be applied to single-hand unblock receipts car mechanism on two seats bassinets still includes:

the lower end of the middle right linkage hinge piece (800) is hinged to the right side of the upper end of the middle lower connecting rod (700), and the upper end of the middle right linkage hinge piece is hinged to the right side of the lower end of the middle upper connecting rod (600);

and the lower end of the middle left linkage hinge part (900) is hinged to the left side of the upper end of the middle lower connecting rod (700), and the upper end of the middle left linkage hinge part is hinged to the left side of the lower end of the middle upper connecting rod (600) and is matched with the middle right linkage hinge part (800) to be hinged with the middle upper connecting rod (600) in a linkage manner.

9. Two seat bassinets, its characterized in that: the one-hand unlocking and folding mechanism applied to the double-seat baby carriage comprises the one-hand unlocking and folding mechanism applied to the double-seat baby carriage as claimed in any one of claims 1 to 8.

10. A tandem stroller as defined in claim 9, wherein: the double-seat baby carrier also comprises a left seat (10a) arranged between the right upper connecting rod (200) and the middle upper connecting rod (600), and a right seat (20a) arranged between the left upper connecting rod (400) and the middle upper connecting rod (600).

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