Baby stroller with handrail capable of being overturned in linkage mode

Abstract

The utility model discloses a baby stroller with a handrail capable of being overturned in a linkage mode, which comprises a front stroller set, a rear stroller set and a push stroller set, a U-shaped push handle frame is hinged to the push stroller set, and connecting rod mechanisms used for folding are arranged on the front stroller set, the rear stroller set and the push handle frame. A T-shaped frame is arranged on the rear trolley set, the two ends of the T-shaped frame are hinged to the front trolley set and the trolley set respectively, a handrail is installed on the trolley set through a first large joint, and a double-connecting-rod assembly is installed between the root of the handrail and the rear wheel set in a rotating connection mode. When the baby stroller is folded and unfolded, the handrails are turned over in a linkage mode to be folded and unfolded, and therefore the height of the baby stroller is reduced when the baby stroller is folded.

Description

Technical Field

[0001] The utility model relates to the field of baby strollers, in particular to a baby stroller with armrests capable of being linked and flipped. Background Art

[0002] The armrests of current baby strollers are generally installed on the top of the rear frame. When the baby stroller is folded, the armrests can be used as handles for the folded baby stroller. Since there are height restrictions on folded baby strollers on current airplanes, the folded height of previous baby strollers is the height of the rear frame plus the height of the armrests. Therefore, the armrests need to be removed every time the baby stroller is boarded, and then installed when the baby stroller is used. This is convenient when using the baby stroller. Now, when the baby stroller needs to be folded, the armrests are flipped over and folded, and when the baby stroller is unfolded, the armrests are unfolded. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention proposes a baby stroller with armrests that can be flipped in a linked manner. When folding, the armrests are flipped and folded accordingly, and when unfolding, the armrests are unfolded accordingly.

[0004] To achieve the above-mentioned object, the present invention provides a baby stroller with armrests that can be flipped in a linked manner, comprising a front vehicle group, a rear vehicle group, and a push-carriage group, wherein a U-shaped push-carriage frame is hingedly connected to the push-carriage group, and a connecting rod mechanism for folding is provided on the front vehicle group, the rear vehicle group, and the push-carriage frame;

[0005] A T-shaped frame is provided on the rear vehicle group, and the two ends of the T-shaped frame are respectively hinged with the front vehicle group and the trolley group. An armrest is installed on the trolley group through the first large joint, and a double-link assembly is installed between the root of the armrest and the rear wheel group through a rotational connection.

[0006] Preferably, the first large joint is formed by rotating two discs, and an arc groove and a limit block are respectively provided on the joint surfaces of the two discs. The limit block slides in the arc groove, thereby limiting the swing angle of the armrest.

[0007] Preferably, a seat frame is mounted on the connecting rod mechanism by means of a rotational connection, and pull tabs are mounted on both sides of the seat frame by means of a rotational connection, the other end of the pull tab is rotationally connected to the first large joint and the pull tab rotates coaxially with the first large joint.

[0008] Preferably, an oblique bracket is provided at the front end of the seat frame, and the oblique bracket and the front end of the seat frame are rotationally connected through a second large joint. A one-way locking assembly is provided in the second large joint, and an unlocking assembly is provided on the second large joint, and the one-way locking assembly is unlocked by the unlocking assembly.

[0009] The second major joint includes two circular shells, which are closed and rotatably connected. The two circular shells form a cavity. A rotating shaft coaxial with the circular shells is arranged in the cavity by a rotating connection. The two circular shells are respectively connected to the seat frame and the oblique bracket; the one-way locking assembly includes a bevel rack and a bevel gear plate. The bevel rack is annular and fixed to the inner side of one of the circular shells. The bevel gear plate is sleeved on the rotating shaft for movement. The bevel rack and the bevel gear plate are engaged with each other. A spring is sleeved on the rotating shaft between the circular shell and the back side of the bevel gear plate. The bevel gear plate and the bevel rack are engaged by the spring. An embedded block is fixed on the circumferential outer wall of the bevel gear plate. A groove for the embedded block to be embedded is opened on the inner wall of the circular shell where the bevel rack is not fixed, so as to realize the synchronous rotation of the circular shell and the bevel gear plate. An embedded groove is opened on the circular shell where the bevel rack is fixed. An unlocking assembly is embedded in the embedded groove. A through hole for the unlocking assembly to pass through is opened at the bottom of the embedded groove. The unlocking assembly passes through the groove of the embedded groove and presses on the bevel gear plate.

[0010] Preferably, the unlocking component is an elastic button, on which multiple push-up plates are fixed. The push-up plates pass through the through holes at the bottom of the embedded groove and rest against the bevel gear plate. A wedge-shaped block is fixed at the end of the push-up plate. The inner side of the wedge-shaped push-up plate extends and rests against the inner wall of the circular shell. A spring is provided between the bottom of the embedded groove and the bottom of the elastic button.

[0011] Preferably, a brake assembly is provided on the rear wheel of the rear vehicle group, and the brake assembly includes a brake pin, a brake hole, a pedal and a brake pipe, wherein a brake pipe is installed between the two rear vehicle groups, and brake holes distributed in a ring array are provided on the inner wall of the rear wheel. A brake pin is provided in the brake pipe and the brake pin is arranged opposite to the brake hole. A pedal is provided on the brake pipe for rotating around the brake pipe, and two groups of waist-shaped holes are opened on the brake pipe, and a sliding rod is inserted into each group of waist-shaped holes. There are two groups of brake pins and the two groups of brake pins correspond to the brake holes of the left and right rear wheels respectively. A tension spring is fixed between the two groups of brake pins, and the brake pin is retracted inward by the tension spring. An inclined groove for the sliding rod to extend into is opened on the inner wall of the pressure plate.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] When the stroller is folded and unfolded, the armrests are linked and flipped to fold and unfold, so that the height of the stroller is lowered when folding;

[0014] The inclined bracket can be rotated in one direction, which is convenient for adjusting the inclination of the inclined bracket;

[0015] Easy to lock the rear wheel quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional view of the present invention.

[0017] Figure 2 It is the right view of the utility model.

[0018] Figure 3 It is a cross-sectional view of the present utility model.

[0019] Figure 4 This is a schematic diagram of the utility model with the seat frame removed.

[0020] Figure 5 This is a schematic diagram of the first major joint of the utility model.

[0021] Figure 6 This is a schematic diagram of the second largest joint of the utility model.

[0022] Figure 7 It is a cross-sectional view of the second largest joint of the utility model.

[0023] Figure 8 This is a schematic diagram of removing the elastic button of the second largest joint of the utility model.

[0024] Figure 9 This is a schematic diagram of the brake assembly of the present invention.

[0025] Figure 10 This is a schematic diagram of the brake pipe and sliding rod of the utility model.

[0026] Figure 11 This is a schematic diagram of the pedal and the chute of the utility model.

[0027] Figure 12 This is a cross-sectional view of the third largest joint of the present invention.

[0028] Figure 13 Schematic diagram of the unlocking mechanism of the present invention.

[0029] Among them, 1. front car group, 2. rear car group, 3. trolley group, 4. push handle frame, 5. connecting rod mechanism, 5.1. first connecting rod, 5.2. second connecting rod, 5.3. third connecting rod, 5.4. fourth connecting rod, 6. T-shaped frame, 7. armrest, 8. double connecting rod assembly, 9. first large joint, 10. arc groove, 11. limit block, 12. seat frame, 13. pull tab, 14. oblique bracket, 15. second large joint, 16. one-way locking assembly, 17. unlocking assembly, 18. oblique rack, 19. oblique gear plate, 20. embedded groove, 21. elastic button, 22. push-up plate, 23. wedge block, 24. brake assembly, 25. brake ejector pin, 26. brake hole, 27. pedal, 28. brake pipe, 29. sliding rod, 30. oblique groove, 31. third large joint, 32. connecting plate, 33. unlocking mechanism. DETAILED DESCRIPTION

[0030] The present invention will now be further described with reference to the accompanying drawings.

[0031] like Figure 1-13 As shown, a baby stroller with a handrail 7 that can be flipped in a linked manner comprises a front vehicle group 1, a rear vehicle group 2 and a pushcart group 3. A U-shaped pushcart frame 4 is hingedly connected to the pushcart group 3. A connecting rod mechanism 5 for folding is provided on the front vehicle group 1, the rear vehicle group 2 and the pushcart frame 4. The front vehicle group 1 is a front vehicle frame on which a front wheel is installed, and the rear vehicle group 2 is a rear vehicle frame on which a rear wheel is installed. The front vehicle group 1 and the pushcart group 3 are folded by swinging toward the rear vehicle group 2 through the connecting rod mechanism 5. The first link 5.1, the second link 5.2, the third link 5.3 and the fourth link 5.4 are included. The top of the first link 5.1 is rotatably connected to the U-shaped push handle frame 4 through the third large joint 31. The bottom of the first link 5.1 is hinged with the second link 5.2, wherein the first link 5.1 is riveted to the rear vehicle group 2 through rivets. The first link 5.1 is rotatably connected to the rear vehicle group 2, the third link 5.3 is hinged to the fourth link 5.4, and the third link 5.3 is hinged to the fourth link 5.4. The other end of the fourth link 5.4 is riveted to the front vehicle group 1 and the rear vehicle group 2 by rivets. The third link 5.3 and the fourth link 5.4 are rotationally connected to the front vehicle group 1 and the rear vehicle group 2 respectively. The bottom of the second link 5.2 is hinged to the fourth link 5.4. When folding, the push handle 4 swings counterclockwise and folds with the stroller group 3, and the first link 5.1 swings clockwise, thus pulling the stroller group 3 to swing downward and fit with the rear vehicle group 2. At the same time, the bottom of the first link 5.1 swings clockwise to pull the second link 5.2 upward, and the third link 5.3 and the fourth link 5.4 are folded. In this way, the front vehicle group 1 swings and folds toward the rear vehicle group 2. Since the first link 5.1 swings downward, the first link 5.1 and the push handle 4 are rotationally connected through the third large joint 31. When the third large joint 31 contacts the ground, the folded state is completed. In this way, the third large joint 31 and the rear wheel group realize the standing state of the folded baby stroller;

[0032] The top of the rear car group 2 is fixed with a T-shaped frame 6 by bolt fastening. The front and rear ends of the T-shaped frame 6 are respectively hinged to the front car group 1 and the trolley group 3. A first large joint 9 is installed on the trolley group 3 by bolt fastening. An armrest 7 is installed on the first large joint 9 by bolt fastening, so that the armrest 7 can swing through the first large joint 9. A double-link assembly 8 is installed between the root of the armrest 7 and the rear wheel group by a rotational connection. The double-link assembly 8 is two connecting rods hinged to each other, wherein one end of the connecting rod is installed on the inner wall of the rear car group 2 by two bolts, and the other connecting rod is hinged at the root of the armrest 7, that is, the hinge point between the connecting rod and the root of the armrest 7 is located on the eccentric outer wall of the first large joint 9. When the trolley group 3 is swung and folded toward the rear wheel group, the connecting rod armrest 7 swings clockwise and folds into fit with the trolley group 3, thereby realizing the folding of the armrest 7.

[0033] The first large joint 9 is formed by rotating two discs, one of which has a cavity on the splicing surface of the disc, and a cylinder that fits the inner wall of the cavity of the other disc is fixed on the splicing surface of the other disc by integrated processing (injection molding). The cylinder extends into the cavity, and an arc groove 10 is opened on the inner wall of the cavity of the disc, and a limit block 11 is fixed on the outer wall of the cylinder by integrated processing (injection molding) to slide in the arc groove 10, thus limiting the swing angle of the armrest 7; a coaxial through hole is opened in the center of the two discs, and a pin is inserted in the through hole, so that the two discs rotate with each other and fit each other, and an arc groove 10 is opened on the fitting circle of one disc, and a limit block 11 that extends into the arc groove 10 is fixed on the other disc by integrated processing (injection molding). The radian of the arc groove 10 is the swing angle of the armrest 7, so that the armrest 7 will only swing to fit the trolley group 3.

[0034] The seat frame 12 is mounted on the connecting rod mechanism 5 in a rotationally connected manner. Connecting pieces 32 are fixed to the left and right sides of the seat frame 12 by bolts. That is, one end of each connecting piece 32 is fixed to the seat frame 12 by two bolts arranged side by side. The connecting piece 32 does not rotate relative to the seat frame 12. The other end of the connecting piece 32 is hinged to the first connecting rod 5.1. Pull tabs 13 are mounted on the left and right sides of the seat frame 12 in a rotationally connected manner (one end of the pull tab 13 is riveted to the seat frame 12 by rivets). The other end of the pull tab 13 is connected to the first large The joint 9 is rotationally connected and the pull tab 13 is coaxially connected to the first major joint 9, that is, the other end of the pull tab 13 is installed on the first major joint 9 by a bolt (there is a gap between the nut of the bolt and the pull tab 13, so that the bolt will not lock the pull tab 13, and the pull tab 13 rotates around the bolt). In this way, the seat frame 12 swings around the first major joint 9. When the first connecting rod 5.1 swings clockwise downward, the first connecting rod 5.1 pulls the rear end of the seat frame 12 downward through the connecting plate 32. In this way, the rear end of the seat frame 12 swings downward to complete the folding. The main function of the pull tab 13 is to increase the strength of the seat frame 12.

[0035] A diagonal bracket 14 is provided at the front end of the seat frame 12, and the diagonal bracket 14 is rotationally connected to the front end of the seat frame 12 through a second large joint 15, so that the diagonal bracket 14 can swing. The angle of the diagonal bracket 14 can be adjusted according to the baby's leg bending habit. A one-way locking component 16 is provided in the second large joint 15, and an unlocking component 17 is provided on the second large joint 15. The one-way locking component 16 is unlocked by the unlocking component 17. When the unlocking component 17 is not unlocked, the one-way locking component 16 is now on the second large joint 15, that is, the one-way locking component 16 restricts the diagonal bracket 14 from swinging downward, but the upward swinging of the diagonal bracket 14 is not affected. When adjusting, the one-way locking component 16 on the second large joint 15 is unlocked by the unlocking component 17. When the baby sits on the seat frame 12, the diagonal bracket 14 is swung upward, so that the angle of the diagonal bracket 14 is adjusted.

[0036] The second large joint 15 includes two circular shells, which are closed and rotatably connected. A coaxial through hole is opened at the center of each circular shell. A pin is inserted into the through hole of the two circular shells so that the two circular shells rotate. The two circular shells form a cavity, and a rotating shaft coaxial with the circular shell is provided in the cavity by a rotational connection (the rotating shaft is the pin, which is directly inserted into the through hole of the circular shell, and the circular shell rotates on the rotating shaft). The two circular shells are respectively connected to the seat frame 12 and the inclined bracket 14 by bolts, so that the seat frame 12 and the inclined bracket are connected. 14 relative rotation; the one-way locking assembly 16 includes a bevel rack 18 and a bevel gear disc 19, and the bevel rack 18 and the bevel gear disc 19 have an annular array of bevel teeth on the opposite surfaces. The bevel rack 18 is annular and is fixed to the inner wall of one of the circular shells by bolts (the inner wall of the circular shell located on the outside is fixed with a ring-shaped bevel rack 18), and the bevel gear disc 19 is sleeved on the rotating shaft for movement. The bevel rack 18 and the bevel gear disc 19 are engaged with each other, and an embedded block is fixed to the circumferential outer wall of the bevel gear disc 19 by an integral molding method, and a groove for embedding the embedded block is opened on the inner wall of the inner circular shell. In this way, the circular shell located on the inner side rotates with the helical gear disc 19. A spring is sleeved on the rotating shaft between the circular shell located on the inner side and the helical gear disc 19. The spring causes the helical gear disc 19 to engage with the helical rack 18. An embedding groove 20 is opened on the circular shell (the circular shell located on the outer side) to which the helical rack 18 is fixed (the embedding groove 20 is located on the outer wall of the circular shell). The unlocking component 17 is embedded in the embedding groove 20 (the unlocking component 17 slides in the embedding groove 20). A through hole for the unlocking component 17 to pass through is opened at the bottom of the embedding groove 20. The unlocking component 17 passes through the embedding groove 20 and presses on the helical gear disc 18. On the disk 19, when the unlocking component 17 is pressed, the beveled toothed disk 19 moves inward and separates from the beveled rack 18, so that the circular shell on the inside can rotate. When the pressing of the unlocking component 17 is stopped, the beveled toothed disk 19 is engaged with the beveled rack 18 under the action of the spring. Since the surfaces of the beveled toothed disk 19 and the beveled rack 18 are both beveled teeth, the circular shell on the inside rotates clockwise and cannot rotate counterclockwise. In this way, the bevel bracket 14 can swing upward but cannot swing downward. When the bevel bracket 14 needs to swing downward, it is necessary to press the unlocking component 17 to separate the beveled toothed disk 19 from the beveled rack 18.

[0037] The unlocking component 17 is an elastic button 21. A plurality of ejecting pieces 22 are fixed on the bottom of the elastic button 21 by means of integral injection molding. The ejecting piece 22 passes through the through hole at the bottom of the embedded groove 20 and rests on the bevel gear disc 19. A wedge block 23 is fixed on the outer side of the end of the ejecting piece 22 by means of integral injection molding. The wedge block 23 extends inside the ejecting piece 22 and rests on the inner wall of the circular shell. In this way, the wedge block 23 forms a hook hanging on the inner wall of the circular shell to prevent the elastic button 21 from falling out of the embedded groove 20. A spring is embedded between the bottom, and the elastic button 21 is pushed back to its original position by the spring. The elastic button 21 is cylindrical. When unlocking is required, the elastic button 21 is pressed inward, and the push-up piece 22 of the elastic button 21 moves into the circular shell. In this way, the push-up piece 22 pushes the bevel gear plate 19 to move inward and separate from the bevel rack 18, so that the inner circular shell can rotate. Since the bevel bracket 14 is fixed on the inner circular shell, when the unlocking component 17 unlocks the second large joint 15, the bevel bracket 14 swings downward to a vertical state under the action of its own gravity.

[0038] A brake assembly 24 is provided on the rear wheel of the rear vehicle group 2. The brake assembly 24 includes a brake pin 25, a brake hole 26, a pedal 27 and a brake pipe 28. A brake pipe 28 is installed between the two rear vehicle groups 2. The two ends of the brake pipe 28 are respectively installed on the left and right rear wheel groups by bolt fastening. Brake holes 26 distributed in a ring array are opened on the inner wall of the rear wheel contour. A brake pin 25 is embedded in the brake pipe 28 for sliding left and right in the brake pipe 28, and the brake pin 25 and the brake hole 26 are arranged opposite to each other (when the rear wheel rotates, the multiple brake holes 26 are sequentially coaxial with the brake pin 25, so that the brake pin 25 can be extended into the brake hole 26). A pedal 27 is sleeved on the brake pipe 28 and rotated around the brake pipe 28 (there is a cylinder on the brake pipe 28, the cylinder is divided into two halves and the two halves are fastened by bolts The cylinder rotates on the brake pipe 28, and the pedal 27 is mounted on the cylinder by bolts. When the pedal 27 is stepped on, the cylinder rotates around the brake pipe 28). Two groups of waist-shaped holes symmetrically arranged on the left and right are opened on the brake pipe 28. A sliding rod 29 is inserted into each group of waist-shaped holes. The brake thimbles 25 are arranged in two groups on the left and right, and the two groups of brake thimbles 25 correspond to the brake holes 26 of the left and right rear wheels respectively. A tension spring is fixed between the two groups of brake thimbles 25 by welding, and the brake thimbles 25 are retracted inward by the tension spring. An oblique groove 30 for the sliding rod 29 to extend into is opened on the inner wall of the cylinder of the pedal 27. When the rear end of the pedal 27 swings downward, the cylinder swings clockwise, so that the sliding rod 29 moves outward under the action of the oblique groove 30, and the sliding rod 29 drives the brake thimble 25 to move outward and extend into the brake hole 26 to lock the brake.

[0039] An unlocking mechanism 33 is installed on the push handle frame 4. The third large joint 31 includes two joint seats. A coaxial through hole is opened at the center of the joint seat. A pin is inserted into the through hole. The joint seat rotates along the pin. A circular hole groove is opened on the surface of the two joint seats that fit together. A plurality of tooth grooves are opened on the inner wall of each groove. The grooves on the two joint seats are connected. Gears that mesh with the tooth grooves are embedded in the grooves. The gears slide in the two grooves. A spiral bevel is fixed on the bottom of the joint seat groove on the inner side by an integral injection molding method. A sleeve is provided between the gear and the spiral bevel. The sleeve is sleeved on the pin, and the sleeve faces the spiral bevel. A spiral bevel groove is provided on the side surface, which fits the spiral bevel. When the sleeve rotates, the bevel of the sleeve moves along the spiral bevel, so that the sleeve moves outward and pushes the gear to move outward, and the gear is separated from the joint seat on the inside, so that the gear meshes with the tooth groove of the joint seat on the outside, so that the joint seat is unlocked and rotated. A spring is installed between the gear and the groove of the outer joint seat, and a cable is fixed to the sleeve by welding. The cable extends into the handle frame 4 and is connected with the unlocking mechanism 33. A notch is provided on the inner wall of the handle frame 4. The unlocking mechanism 33 is an elastic pressing block, which is pressed by the notch of the handle frame 4. The opening extends into the push handle frame 4, and a mounting block is fixed in the push handle frame 4 by means of bolt fastening. Slide grooves are provided on the upper and lower surfaces of the mounting block, and a moving block sliding in the slide groove is provided in the slide groove. The top of the moving block is a triangular inclined surface, and an inclined surface that fits the triangular inclined surface of the moving block is provided on the elastic pressing block. A spring is fixed between the bottom of the elastic pressing block and the push handle frame 4 by welding, and the elastic pressing block is pushed outward by the spring. When the elastic pressing block is pressed, the cable is pulled, and the cable is embedded in the third large joint 3131 through the hollow push handle frame 4 and is fixed to the sleeve through a threaded joint. The cable pulls the sleeve Rotate to unlock. When the elastic pressing block stops being pressed, the cable loses its tension, and the gear between the gear and the joint seat is pressed inward, so that the gear is stuck on the two joint seats, thereby achieving joint locking. The locking and unlocking mechanism 33 of the third large joint 31 is the existing technology. Here we only explain how the third large joint 31 is locked and unlocked to achieve the stability of the baby stroller after folding and unfolding. The unlocking mechanism 33 of this application and the internal mechanism of the third large joint 31 are the existing technology of current baby strollers. This application only briefly explains the structure of the third large joint 31 and the structure of the unlocking mechanism 33.

[0040] The counterclockwise rotation and clockwise rotation of the present application mechanism are both based on the right side view.

Claims

1. A baby stroller with armrests that can be flipped in a linked manner, comprising a front carriage assembly, a rear carriage assembly, and a pusher assembly, wherein a U-shaped push handle frame is hingedly connected to the pusher assembly, and a connecting rod mechanism for folding is provided on the front carriage assembly, the rear carriage assembly, and the push handle frame; It is characterized by: A T-shaped frame is provided on the rear vehicle group, and the two ends of the T-shaped frame are respectively hinged with the front vehicle group and the trolley group. An armrest is installed on the trolley group through the first large joint, and a double-link assembly is installed between the root of the armrest and the rear wheel group through a rotational connection.

2. The baby stroller with armrest linkage flip-up according to claim 1, characterized in that: The first major joint is formed by rotating two discs. An arc groove and a limit block are respectively provided on the joint surface of the two discs. The limit block slides in the arc groove, thus limiting the swing angle of the armrest.

3. The baby stroller with armrest linkage flip-up according to claim 2, characterized in that: A seat frame is mounted on the connecting rod mechanism by means of a rotational connection, and pull tabs are mounted on both sides of the seat frame by means of a rotational connection. The other end of the pull tab is rotationally connected to the first large joint, and the pull tab rotates coaxially with the first large joint.

4. The baby stroller with armrest linkage flip-up according to claim 3, characterized in that: An oblique bracket is provided at the front end of the seat frame, and the oblique bracket and the front end of the seat frame are rotationally connected through the second large joint. A one-way locking assembly is provided in the second large joint, and an unlocking assembly is provided on the second large joint. The one-way locking assembly is unlocked by the unlocking assembly.

5. The baby stroller with armrests that can be flipped in a linked manner according to claim 4, characterized in that: The second major joint includes two circular shells, which are closed and rotatably connected. The two circular shells form a cavity. A rotating shaft coaxial with the circular shells is arranged in the cavity by a rotating connection. The two circular shells are respectively connected to the seat frame and the oblique bracket; the one-way locking assembly includes a bevel rack and a bevel gear plate. The bevel rack is annular and fixed to the inner side of one of the circular shells. The bevel gear plate is sleeved on the rotating shaft for movement. The bevel rack and the bevel gear plate are engaged with each other. A spring is sleeved on the rotating shaft between the circular shell and the back side of the bevel gear plate. The bevel gear plate and the bevel rack are engaged by the spring. An embedded block is fixed on the circumferential outer wall of the bevel gear plate. A groove for the embedded block to be embedded is opened on the inner wall of the circular shell where the bevel rack is not fixed, so as to realize the synchronous rotation of the circular shell and the bevel gear plate. An embedded groove is opened on the circular shell where the bevel rack is fixed. An unlocking assembly is embedded in the embedded groove. A through hole for the unlocking assembly to pass through is opened at the bottom of the embedded groove. The unlocking assembly passes through the groove of the embedded groove and presses on the bevel gear plate.

6. The baby stroller with armrests that can be flipped in a linked manner according to claim 5, characterized in that: The unlocking component is an elastic button, on which multiple push-up pieces are fixed. The push-up pieces pass through the through holes at the bottom of the embedded groove and rest on the bevel gear disk. A wedge-shaped block is fixed at the end of the push-up piece. The inner side of the wedge-shaped push-up piece extends and rests on the inner wall of the circular shell. A spring is provided between the bottom of the embedded groove and the bottom of the elastic button.

7. The baby stroller with armrests that can be flipped in a linked manner according to claim 6, characterized in that: A brake assembly is provided on the rear wheel of the rear vehicle group, and the brake assembly includes a brake pin, a brake hole, a pedal and a brake pipe. A brake pipe is installed between the two rear vehicle groups, and brake holes distributed in a ring array are provided on the inner wall of the rear wheel. A brake pin is provided in the brake pipe and the brake pin and the brake hole are arranged opposite to each other. A pedal that rotates around the brake pipe is provided on the brake pipe. Two groups of waist-shaped holes are opened on the brake pipe, and a sliding rod is inserted into each group of waist-shaped holes. There are two groups of brake pins, and the two groups of brake pins correspond to the brake holes of the left and right rear wheels respectively. A tension spring is fixed between the two groups of brake pins, and an inclined groove for the sliding rod to extend into is opened on the inner wall of the pressure plate.

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