Multi-form child three-wheel cart

Abstract

The utility model relates to a multi-form child three-wheel stroller which comprises a frame cross beam, a front fork is rotationally installed at the front end of the frame cross beam, a support is installed in the middle of the frame cross beam, a seat is installed at the upper end of the support, an installation part is arranged on the lower portion of the support, and the upper end and the lower end of the installation part are each rotationally connected with a rear wheel supporting arm. The upper end and the lower end of the installation part are each provided with a first gear groove, one end of each rear wheel supporting arm is provided with a first butt joint gear groove, each first butt joint gear groove and the corresponding first gear groove are spliced to form a cavity, an upper gear and a lower gear are installed in the upper cavity and the lower cavity respectively, and the two sides of the upper end of the upper gear are each provided with a stand column. The two stand columns penetrate through the mounting part to abut against the upper gear, a first unlocking button is installed at the bottom of the rear wheel supporting arm located on the lower portion, and the first unlocking button abuts against the lower gear. The detachable backrest structure and the detachable push rod assembly structure are designed, multi-gear adjustment of the seat is increased, and functional diversification is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of children's vehicles, in particular to a multi-form three-wheeled children's stroller. Background Art

[0002] When taking children out, people are accustomed to using a three-wheeled stroller to take them out. This is more convenient, does not require holding the child in the arms for a long time, and also prevents the child from running around.

[0003] Currently, children's three-wheeled strollers have relatively limited functionality and cannot be transformed into other vehicle forms, resulting in significant limitations. An existing patent (publication number: CN 216915975U) discloses a transformable three-wheeled stroller for children, comprising a frame and a seat. A front wheel assembly is mounted at the front end of the frame, and a foldable rear wheel assembly is mounted at the rear end of the frame. The foldable rear wheel assembly comprises a base and two rear wheel arms. The base is rotatably connected to a rear wheel arm at its upper and lower ends, and each rear wheel arm is mounted at one end with a reversible rear wheel. A gear groove is defined at each upper and lower end of the base, and a spring is mounted in the gear groove. The rear wheel arms are provided with a docking gear groove and an unlocking button that passes through the docking gear groove. The docking gear groove and the gear groove are spliced ​​together to form an inner cavity, in which a sliding engaging gear is mounted. The base is also provided with a seat and a push rod. This three-wheeled stroller for children can also be transformed into a children's balance car, achieving multiple uses and providing strong functionality. However, this stroller requires pressing two unlocking buttons at the same time to rotate the rear wheel arm, which is relatively troublesome to operate, and the internal structure is complex. In addition, the other functions of this stroller are relatively simple. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a multi-form three-wheeled stroller for children. By pressing the first unlocking button, the support and the two rear wheel support arms can be unlocked, and the rear wheel support arms and the support can rotate relative to each other. The operation is convenient and the internal structure is relatively simple. A detachable backrest structure and a detachable push rod assembly structure are also designed, and multiple gear adjustments of the seat are added to achieve diversified functions.

[0005] The technical solution adopted by the utility model to solve the technical problem is as follows: a multi-form children's three-wheeled stroller is provided, comprising a front fork, a frame crossbeam and a rear wheel, the front end of the frame crossbeam is rotatably mounted with the front fork, the lower part of the front fork is mounted with a front wheel and a pedal for controlling the front wheel, the front fork is mounted with a handlebar for controlling the steering of the front wheel, the middle part of the frame crossbeam is mounted with a support, the upper end of the support is mounted with a seat, the lower part of the support is provided with a mounting portion, the upper and lower ends of the mounting portion are rotatably connected to a rear wheel support arm, the upper and lower ends of the mounting portion are provided with a A first gear groove, a first docking gear groove is opened at one end of each rear wheel support arm, the first docking gear groove and the corresponding first gear groove are spliced ​​to form a chamber, the upper gear and the lower gear are respectively installed in the upper and lower chambers, a column is installed on both sides of the upper end of the upper gear, the two columns pass through the mounting portion to support the upper gear, the bottom of the rear wheel support arm located below is installed with a first unlocking button, the first unlocking button supports the lower gear, and the upper end of the upper gear is installed with a first spring in the upper chamber, and a reversible rear wheel is installed at one end of each rear wheel support arm.

[0006] As a supplement to the technical solution of the present invention, a cup holder is installed at the front end of the front fork.

[0007] As a supplement to the technical solution described in the present invention, the other end of the rear wheel support arm is provided with two supporting parts arranged opposite to each other in an upper and lower direction. A connecting part is installed on one side of the rear wheel shaft, and the connecting part is rotatably installed between the two supporting parts. A second gear groove is provided at the upper end of the connecting part, and a second docking gear groove is provided at the lower end of the support part located above. The second docking gear groove and the corresponding second gear groove are spliced ​​together to form a chamber, and a snap-on gear that slides up and down and a second spring installed at the upper end of the snap-on gear are installed in the chamber. A second unlocking button is installed at the upper end of the support part located above, and the second unlocking button presses against the snap-on gear.

[0008] As a supplement to the technical solution described in the present invention, a slide groove is provided at the lower end of the middle part of the frame crossbeam along the length direction, and a plurality of adjustment holes are provided inside the slide groove. A lifting seat that slides up and down is installed in the lower part of the support, and a positioning protrusion that cooperates with the adjustment hole is provided at the upper end of the lifting seat. A third spring is connected to the lower end of the lifting seat, and a through hole is provided in the middle of the lifting seat. A slope is provided at the bottom of the through hole. An adjustment button is provided on one side of the lower part of the support, and an inclined plate is installed at one end of the adjustment button. The inclined plate is inserted into the through hole and resists the slope.

[0009] As a supplement to the technical solution described in the present invention, a detachable push rod assembly is installed at the rear end of the frame cross beam, and the push rod assembly includes a telescopic push rod and a sleeve. The rear end of the frame cross beam is flat, and a positioning socket is provided on the top of the rear end of the frame cross beam. The upper part of the sleeve is fixedly connected to the telescopic push rod, and the lower part of the sleeve is sleeved on the frame cross beam. A positioning rod is slidably installed in the upper part of the sleeve, and a driving switch for controlling the upward and downward sliding of the positioning rod is provided on the outer side of the upper part of the sleeve, and the lower end of the positioning rod is inserted into the positioning socket.

[0010] As a supplement to the technical solution described in the present invention, a guide column is vertically installed in the middle of each gear groove, and the upper gear and the lower gear are respectively sleeved on the two guide columns.

[0011] As a supplement to the technical solution described in the present invention, a backrest is also included. The rear part of the upper end of the seat is provided with an insertion tube, the inner wall of the insertion tube is provided with a card slot, the lower end of the backrest is provided with an insertion column inserted into the insertion tube, the rear side of the insertion column is installed with a lock and a third unlocking button for controlling the extension and retraction of the lock, and the lock is buckled into the card slot.

[0012] As a supplement to the technical solution of the present invention, the backrest is further provided with armrests and a tent.

[0013] As a supplement to the technical solution described in the present invention, a cover that slides up and down is installed inside the insert tube, and a fourth spring is installed below the cover inside the insert tube.

[0014] As a supplement to the technical solution described in the present invention, a plurality of vertical grooves are arranged on the inner wall of the insert tube, and a guide protrusion that cooperates with the vertical grooves is provided on the side of the cover.

[0015] Beneficial effects: The utility model relates to a multi-form three-wheeled stroller for children. By pressing the first unlocking button, the support and the two rear wheel arms can be unlocked, and the rear wheel arms and the support can be rotated relative to each other. The operation is convenient and the internal structure is relatively simple. A detachable backrest structure and a detachable push rod assembly structure are also designed, and multiple gear adjustments of the seat are added to achieve diversified functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 This utility model Figure 2 A partial enlarged view of point A in the middle;

[0019] Figure 4 It is a structural diagram of the support described in the utility model;

[0020] Figure 5 This is a schematic structural diagram of the rear wheel support arm described in the utility model;

[0021] Figure 6 It is a structural schematic diagram of the rear wheel of the utility model;

[0022] Figure 7 This is a structural diagram of the engaging gear, the second spring, and the second unlocking button of the present invention;

[0023] Figure 8 This is a structural diagram of the lifting seat, positioning protrusion, third spring and adjustment button of the utility model;

[0024] Figure 9 This is a schematic diagram of the structure of the utility model after the support is removed;

[0025] Figure 10 It is a cross-sectional view of the push rod assembly described in the utility model;

[0026] Figure 11 This is a schematic diagram of the structure of the utility model without the backrest;

[0027] Figure 12 It is a structural diagram of the backrest described in the utility model;

[0028] Figure 13 It is a structural diagram of the seat described in the utility model;

[0029] Figure 14 It is a structural schematic diagram of the cover described in the utility model.

[0030] Illustration: 1. Front fork, 2. Front wheel, 3. Foot pedal, 4. Handlebar, 5. Support, 6. Frame crossbeam, 7. Rear wheel support arm, 8. Seat, 9. Rear wheel, 10. Backrest, 11. Push rod assembly, 12. Tent, 13. Adjustment button, 14. Cup holder, 15. Mounting part, 16. Upper gear, 17. First spring, 18. Lower gear, 19. Post, 20. First unlocking button, 21. First gear groove, 22. Guide post, 23. First docking gear groove, 24. Support part, 25. Second docking gear groove, 26. Connecting part, 27. Second gear groove, 28. Engaging gear, 29. Second spring, 30. Second unlocking button, 31. Lifting seat, 32. Positioning protrusion, 33. Third spring, 34. Through hole, 35. Slope, 36. Inclined plate, 37. Slide, 38. Adjustment hole position, 39. Sleeve, 40. Drive switch, 41. Telescopic push rod, 42. Positioning plug rod, 43. Positioning socket, 44. Cover, 45. Insertion tube, 46. Handrail, 47. Insert column, 48. Lock, 49. Third unlocking button, 50. Slot, 51. Vertical groove, 52. Guide protrusion. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the contents of this invention, those skilled in the art may make various changes or modifications to the present invention, and that such equivalents also fall within the scope of the claims appended hereto.

[0032] The embodiment of the present utility model relates to a multi-form three-wheeled stroller for children, such as Figure 1-14As shown, the bicycle comprises a front fork 1, a frame crossbeam 6 and a rear wheel 9, the front end of the frame crossbeam 6 is rotatably mounted with the front fork 1, the lower part of the front fork 1 is mounted with a front wheel 2 and a pedal 3 for controlling the front wheel 2, the front fork 1 is mounted with a handlebar 4 for controlling the steering of the front wheel 2, the middle part of the frame crossbeam 6 is mounted with a support 5, the upper end of the support 5 is mounted with a seat 8, the lower part of the support 5 is provided with a mounting portion 15, the upper and lower ends of the mounting portion 15 are rotatably connected to a rear wheel support arm 7, the upper and lower ends of the mounting portion 15 are provided with a first gear groove 21, and one end of each rear wheel support arm 7 is opened There is a first docking gear groove 23, which is spliced ​​with the corresponding first gear groove 21 to form a chamber. The upper gear 16 and the lower gear 18 are respectively installed in the upper and lower chambers. A column 19 is installed on both sides of the upper end of the upper gear 16. The two columns 19 pass through the mounting portion 15 to support the upper gear 16. The bottom of the rear wheel support arm 7 located below is equipped with a first unlocking button 20, which supports the lower gear 18. The upper end of the upper gear 16 is equipped with a first spring 17 inside the upper chamber. A reversible rear wheel 9 is installed at one end of each rear wheel support arm 7.

[0033] Under normal circumstances, both the upper gear 16 and the lower gear 18 are partially located in the first docking gear groove 23, and the other part is located in the first gear groove 21. In this case, the support 5 and the two rear wheel arms 7 are in a locked state and cannot rotate relative to each other; only by pressing the first unlocking button 20, the first unlocking button 20 will completely push the lower gear 18 into the first gear groove 21 below, and the columns 19 on both sides of the upper end of the lower gear 18 will push the upper gear 16, and the upper gear 16 will move with the lower gear 18. The upper gear 16 is completely pushed into the first docking gear groove 23 of the upper rear wheel arm 7. At this time, the support 5 and the two rear wheel arms 7 are in an unlocked state, and the rear wheel arm 7 and the support 5 can rotate relative to each other.

[0034] A cup holder 14 is installed at the front end of the front fork 1, and the cup holder 14 can be used to place cups or water bottles.

[0035] As an explanation of the flipping structure of the rear wheel 9, the other end of the rear wheel support arm 7 is provided with two supporting parts 24 arranged opposite to each other in an upper and lower direction. A connecting part 26 is installed on one side of the rotating shaft of the rear wheel 9. The connecting part 26 is rotatably installed between the two supporting parts 24. A second gear groove 27 is provided at the upper end of the connecting part 26. A second docking gear groove 25 is provided at the lower end of the upper support part 24. The second docking gear groove 25 is spliced ​​with the corresponding second gear groove 27 to form a chamber. A snap-on gear 28 that slides up and down and a second spring 29 installed at the upper end of the snap-on gear 28 are installed in the chamber. The upper support portion 24 is provided with a second unlocking button 30 at its upper end, and the second unlocking button 30 presses against the engaging gear 28; under normal circumstances, the engaging gear 28 is partially located in the second docking gear groove 25, and the other part is located in the second gear groove 27, so that the connecting portion 26 and the rear wheel support arm 7 are in a locked state and cannot rotate relative to each other; only by pressing the second unlocking button 30, the second unlocking button 30 will completely push the engaging gear 28 into the second docking gear groove 25, and at this time the connecting portion 26 and the rear wheel support arm 7 are in an unlocked state, and can rotate relative to each other, thereby realizing the flipping of the rear wheel 8.

[0036] As a preferred solution for the support 5 and the seat 8, a slide groove 37 is provided at the lower end of the middle portion of the frame crossbeam 6 along the length direction, and a plurality of adjustment holes 38 are provided inside the slide groove 37. A lifting seat 31 that slides up and down is installed in the lower portion of the support 5. A positioning protrusion 32 that cooperates with the adjustment hole 38 is provided at the upper end of the lifting seat 31. A third spring 33 is connected to the lower end of the lifting seat 31. A through hole 34 is provided in the middle portion of the lifting seat 31. A slope 35 is provided at the bottom of the through hole 34. An adjustment button 13 is provided on one side of the lower portion of the support 5, and an inclined plate 36 is installed at one end of the adjustment button 13. , the inclined plate 36 is inserted into the through hole 34 and abuts against the slope 35; when the front and rear position of the seat 8 needs to be adjusted, the adjustment button 13 is pressed to allow the inclined plate 36 to be inserted into the through hole 34 and squeeze the slope 35 to force the lifting seat 31 to move downward, so that the positioning protrusion 32 can be disengaged from the adjustment hole 38, and the front and rear position of the seat 8 is moved. After reaching the desired position, the positioning protrusion 32 is aligned with the corresponding adjustment hole 38, and the adjustment button 13 is released. The lifting seat 31 returns to its original position upward by the elastic force of the third spring 33, and the positioning protrusion 32 is inserted into the corresponding adjustment hole 38; the lower part of the inclined plate 36 abutting against the slope 35 is an inclined surface.

[0037] As a preferred embodiment of the push rod assembly 11, a detachable push rod assembly 11 is installed at the rear end of the frame cross beam 6. The push rod assembly 11 includes a telescopic push rod 41 and a sleeve 39. The rear end of the frame cross beam 6 is flat. A positioning socket 43 is provided on the top of the rear end of the frame cross beam 6. The upper part of the sleeve 39 is fixedly connected to the telescopic push rod 41. The lower part of the sleeve 39 is sleeved on the frame cross beam 6. A positioning rod 42 is slidably installed in the upper part of the sleeve 39. The outer side of the upper part of the sleeve 39 is provided with a control rod 42 to slide up and down. The driving switch 40 is driven, and the lower end of the positioning rod 42 is inserted into the positioning hole 43; when the push rod assembly 11 needs to be disassembled, the positioning rod 42 is controlled by the driving switch 40 to slide upward and disengage from the positioning hole 43, so that the sleeve 39 can be pulled out of the rear end of the frame crossbeam 6, thereby separating the push rod assembly 11 from the frame crossbeam 6; the driving switch 40 can be slid up and down, and the positioning rod 42 can be driven by the driving switch 40 to slide up and down together; a reset spring can be installed on the upper part of the positioning rod 42, which can be reset by the reset spring or by the weight of the positioning rod 42.

[0038] As a preferred solution for the upper gear 16 and the lower gear 18, a guide column 22 is vertically installed in the middle of each gear groove 21. The upper gear 16 and the lower gear 18 are respectively mounted on the two guide columns 22, so that the upper gear 16 and the lower gear 18 can move stably up and down along their respective guide columns 22.

[0039] As a preferred embodiment of the backrest 10, a backrest 10 is also included, which can be disassembled as needed. The backrest 10 is also provided with armrests 46 and a tent 12. The rear part of the upper end of the seat 8 is provided with an insert 45, and the inner wall of the insert 45 is provided with a card slot 50. The lower end of the backrest 10 is provided with a column 47 inserted into the insert 45, and the rear side of the column 47 is equipped with a lock 48 and a third unlocking button 49 for controlling the extension and retraction of the lock 48, and the lock 48 is buckled into the card slot 50; when the backrest 10 needs to be disassembled, press the third unlocking button 49 to make the lock 48 retract and disengage from the card slot 50, so that the column 47 can pull out the insert 45.

[0040] As a preferred embodiment of the insert 45, a cover 44 that slides up and down is installed inside the insert 45, and a fourth spring is installed below the cover 44 inside the insert 45; when the backrest 10 is removed, the cover 44 is reset by the elastic force of the fourth spring, and the cover 44 is prevented from entering through the upper end of the insert 45.

[0041] The inner wall of the insert 45 is provided with a plurality of vertical grooves 51 , and the side of the cover 44 is provided with guide protrusions 52 that cooperate with the vertical grooves 51 ; through the cooperation between the guide protrusions 52 and the vertical grooves 51 , the cover 44 can slide stably up and down within a certain vertical range.

[0042] Figure 1 The diagram shows a normal three-wheeled stroller in use, but other configurations are possible. First, rotate the two rear wheels 9 inward 180 degrees. Then, press the first unlocking button 20 and rotate the two rear wheel arms 7 so that the two rear wheels 9 are brought together to form a large rear wheel. Release the first unlocking button 20 to secure the position of the rear wheel arms 7 and the support 5. Then, remove the backrest 10 and push rod assembly 11 to transform the stroller into a two-wheeled balance vehicle.

[0043] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0046] The above is a detailed introduction to a multi-form children's three-wheeled stroller provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A polymorphous three-wheeled stroller for children, comprising a front fork (1), a frame crossbeam (6) and a rear wheel (9), characterized in that: The front end of the frame crossbeam (6) is rotatably mounted with a front fork (1), the lower part of the front fork (1) is mounted with a front wheel (2) and a pedal (3) for controlling the front wheel (2), the front fork (1) is mounted with a handlebar (4) for controlling the steering of the front wheel (2), the middle part of the frame crossbeam (6) is mounted with a support (5), the upper end of the support (5) is mounted with a seat (8), the lower part of the support (5) is provided with a mounting portion (15), the upper and lower ends of the mounting portion (15) are rotatably connected to a rear wheel support arm (7), the upper and lower ends of the mounting portion (15) are provided with a first gear groove (21), and one end of each rear wheel support arm (7) is provided with a first docking gear groove (23), the first docking gear groove (23) and the corresponding first gear groove (21) are spliced ​​to form a chamber, and an upper gear (16) and a lower gear (18) are respectively installed in the upper and lower chambers, and a column (19) is installed on both sides of the upper end of the upper gear (16), and the two columns (19) pass through the mounting portion (15) to support the upper gear (16), and the rear wheel support arm (7) located at the bottom is installed with a first unlocking button (20), and the first unlocking button (20) supports the lower gear (18), and a first spring (17) is installed at the upper end of the upper gear (16) in the upper chamber, and a flippable rear wheel (9) is installed at one end of each rear wheel support arm (7).

2. The multi-shaped three-wheeled stroller for children according to claim 1, characterized in that: A cup holder (14) is installed at the front end of the front fork (1).

3. The multi-shaped three-wheeled stroller for children according to claim 1, characterized in that: The other end of the rear wheel support arm (7) is provided with two supporting parts (24) arranged opposite to each other in an upper and lower direction. A connecting part (26) is installed on one side of the rotating shaft of the rear wheel (9). The connecting part (26) is rotatably installed between the two supporting parts (24). A second gear groove (27) is provided at the upper end of the connecting part (26). A second docking gear groove (25) is provided at the lower end of the upper supporting part (24). The second docking gear groove (25) and the corresponding second gear groove (27) are spliced ​​to form a chamber. A clamping gear (28) that slides up and down and a second spring (29) installed at the upper end of the clamping gear (28) are installed in the chamber. A second unlocking button (30) is installed at the upper end of the upper supporting part (24). The second unlocking button (30) presses against the clamping gear (28).

4. The multi-shaped three-wheeled stroller for children according to claim 1, characterized in that: The lower end of the middle part of the frame crossbeam (6) is provided with a slide groove (37) along the length direction, and a plurality of adjustment holes (38) are provided inside the slide groove (37). A lifting seat (31) that slides up and down is installed in the lower part of the support (5), and a positioning protrusion (32) that cooperates with the adjustment hole (38) is provided at the upper end of the lifting seat (31). A third spring (33) is connected to the lower end of the lifting seat (31). A through hole (34) is provided in the middle part of the lifting seat (31), and a slope (35) is provided at the bottom of the through hole (34). An adjustment button (13) is provided on one side of the lower part of the support (5), and an inclined plate (36) is installed at one end of the adjustment button (13). The inclined plate (36) is inserted into the through hole (34) and abuts against the slope (35).

5. The multi-shaped three-wheeled stroller for children according to claim 1, characterized in that: The rear end of the frame crossbeam (6) is equipped with a detachable push rod assembly (11), which includes a telescopic push rod (41) and a sleeve (39). The rear end of the frame crossbeam (6) is flat, and a positioning socket (43) is provided on the top of the rear end of the frame crossbeam (6). The upper part of the sleeve (39) is fixedly connected with the telescopic push rod (41), and the lower part of the sleeve (39) is sleeved on the frame crossbeam (6). A positioning rod (42) is slidably installed in the upper part of the sleeve (39), and a driving switch (40) for controlling the upward and downward sliding of the positioning rod (42) is provided on the outer side of the upper part of the sleeve (39). The lower end of the positioning rod (42) is inserted into the positioning socket (43).

6. The multi-shaped three-wheeled stroller for children according to claim 1, characterized in that: A guide column (22) is vertically installed in the middle of each gear groove (21), and the upper gear (16) and the lower gear (18) are respectively sleeved on the two guide columns (22).

7. The multi-shaped three-wheeled stroller for children according to claim 1, characterized in that: It also includes a backrest (10), and the rear part of the upper end of the seat (8) is provided with an insert (45), the inner wall of the insert (45) is provided with a card slot (50), the lower end of the backrest (10) is provided with an insert column (47) inserted into the insert column (45), the rear side of the insert column (47) is installed with a lock (48) and a third unlocking button (49) for controlling the extension and retraction of the lock (48), and the lock (48) is buckled into the card slot (50).

8. The multi-shaped three-wheeled stroller for children according to claim 7, characterized in that: The backrest (10) is also provided with an armrest (46) and a tent (12).

9. The multi-shaped three-wheeled stroller for children according to claim 7, characterized in that: A cover (44) that slides up and down is installed inside the inserting tube (45), and a fourth spring is installed below the cover (44) inside the inserting tube (45).

10. The multi-shaped three-wheeled stroller for children according to claim 9, characterized in that: The inner wall of the inserting tube (45) is provided with a plurality of vertical grooves (51), and the side edge of the cover (44) is provided with a guide protrusion (52) that matches the vertical grooves (51).

Images