Baby stroller with backrest group automatic unlocking and falling function

Abstract

The utility model relates to the field of baby strollers, in particular to a baby stroller with a backrest group automatic unlocking and dropping function, which comprises a stroller frame main body, a seat main body and a transmission structure, a lower push handle tube and an upper push handle tube in the stroller frame main body are connected through a locking joint, a single-hand control button is arranged on the upper push handle tube, and the backrest group automatic unlocking and dropping function is arranged on the seat main body. A backrest clamping tenon is arranged at the lower end of a U-shaped backrest pipe in the seat body, a backrest clamping seat is movably connected to the rear end of a seat frame pipe, the backrest clamping tenon is matched with the backrest clamping seat to achieve locking and unlocking of the U-shaped backrest pipe, and a front leg pipe, an upper push handle pipe and the backrest clamping seat are linked through a transmission structure. The frame main body is linked with the backrest pipe on the seat main body through the transmission structure, so that the angle of the backrest can be adjusted by a single hand during use, automatic unlocking and falling are realized during folding, the backrest pipe is not required to be broken or the backrest is not required to be manually adjusted to a proper angle, the operation is simple, the adjustment is convenient, the backrest can be adjusted during use, and the practicability is high. The baby stroller can be quickly folded.

Description

Technical Field

[0001] The utility model relates to the field of baby strollers, in particular to a baby stroller with a backrest group having an automatic unlocking and falling-off function. Background Art

[0002] At present, the most common way to adjust the backrest of tri-fold baby strollers on the market is to adjust the length of the webbing through the webbing adjustment buckle to adjust the backrest angle of the stroller platform. This backrest adjustment structure is very inconvenient to use when the child is lying flat. Some backrest adjustments are made through a backrest group composed of pipe fittings, stamping parts, etc. Since the height of the tri-fold stroller is relatively low after folding, most of them break the upper end of the backrest tube so that it can stand independently after folding and the cloth cover on the upper end of the backrest does not touch the ground. However, this operation is very cumbersome and inconvenient for parents to take care of the child alone.

[0003] To this end, the present application proposes a baby stroller with an automatic unlocking and detaching function for a backrest assembly to solve the above-mentioned problem. Utility Model Content

[0004] In view of the existing problems, the present invention provides a baby stroller with an automatic unlocking and detaching function for a backrest assembly, which can effectively solve the problems raised in the background technology.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A baby stroller with a backrest assembly automatic unlocking and detaching function, comprising:

[0007] The frame body has two states: expanded and folded. The frame body includes a front leg tube, a lower push handle tube, and an upper push handle tube. The lower push handle tube and the upper push handle tube are connected by a locking joint. The upper push handle tube is provided with a single-handed control button for unlocking the locking joint, so that the front leg tube, the lower push handle tube, and the upper push handle tube can be folded and expanded.

[0008] The seat body comprises a leg support tube, a seat frame tube and a U-shaped backrest tube which are sequentially connected. The lower end of the U-shaped backrest tube is provided with a backrest latch. The rear end of the seat frame tube is movably connected to a backrest holder. The backrest latch cooperates with the backrest holder to achieve locking and unlocking of the U-shaped backrest tube.

[0009] The transmission structure links the front leg tube, the upper push handle tube and the backrest seat. When the upper push handle tube is unlocked and pushed, the front leg tube, the lower push handle tube and the backrest seat are driven to rotate synchronously, so that the backrest tenon and the backrest seat are unlocked.

[0010] As a further solution of the present invention: the frame body also includes a large joint, a rear leg tube, a front wheel and a rear wheel, the front wheel is installed on the front leg tube, the rear wheel is installed on the rear leg tube, the front leg tube, the rear leg tube and the push-down handle tube are connected together through the large joint, and the handrail tube is installed on the large joint.

[0011] As a further solution of the present invention: there are two symmetrical locking joints, a shelf pipe is installed between the two locking joints, and after the locking joints are unlocked by the single-handed control button, the shelf pipe can rotate.

[0012] As a further solution of the present invention: a seat frame support tube is fixedly connected to the front leg tube, and the seat frame tube is installed on the seat frame support tube.

[0013] As a further solution of the present invention: the leg support tube and the seat frame tube are connected by a bending joint 1, and the seat frame tubes on both sides are connected by a bending joint 2. When folded, the leg support tube and the seat frame tube are retracted by the bending joint 2.

[0014] As a further solution of the present invention: the transmission structure includes a base frame connecting tube, a support connecting tube, a first connecting plate and a second connecting plate, the base frame connecting tube and the support connecting tube are rotatably connected at one end close to each other, the other end of the base frame connecting tube is rotatably connected to the front leg tube, the other end of the support connecting tube is rotatably connected to the upper push handle tube, the first connecting plate is rotatably connected to one end of the second connecting plate, the other end of the second connecting plate is rotatably connected to the support connecting tube, the position of the second connecting plate away from the end is rotatably connected to one end of the seat frame tube close to the U-shaped backrest tube, and the other end of the first connecting plate is rotatably connected to the backrest seat.

[0015] As a further solution of the present invention: the lower end of the U-shaped backrest tube is fixedly connected with a fastening sleeve, the fastening sleeve and the backrest holder are movably connected through a third connecting piece, and the connection between the third connecting piece and the backrest holder is rotatably connected to the seat frame tube.

[0016] As a further solution of the present invention: the backrest seat is provided with at least two slots and one limiting arc slot.

[0017] As a further solution of the present invention: a protrusion is provided on one side of the backrest holder, and after the backrest tenon is locked with the backrest holder, the protrusion abuts against the seat frame tube.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention links the frame body and the backrest tube on the seat body together through a transmission structure, so that the backrest angle can be adjusted with one hand during use, and it is automatically unlocked and detached when the stroller is folded without the need to break the backrest tube or manually adjust the backrest to a suitable angle. The operation is simple and the adjustment is convenient. The backrest can be adjusted during use, and the stroller can be folded and folded quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model from one perspective;

[0020] Figure 2 This is a three-dimensional schematic diagram of the overall structure of the utility model from another perspective;

[0021] Figure 3 It is a side view schematic diagram of the overall structure of the utility model;

[0022] Figure 4 for Figure 3 Exploded diagram of some structures;

[0023] Figure 5 This is a top view of the overall structure of the utility model;

[0024] Figure 6 for Figure 5 Schematic diagram of the middle AA section;

[0025] Figure 7 for Figure 6 A in the middle is an enlarged schematic diagram;

[0026] Figure 8 This is a schematic diagram of unlocking the backrest latch from the backrest holder in the present invention;

[0027] Figure 9 This is a schematic diagram of the connection between the seat body and the transmission structure in the present utility model;

[0028] Figure 10 The U-shaped backrest tube adjustment diagram in this utility model Figure 1 ;

[0029] Figure 11 The U-shaped backrest tube adjustment diagram in this utility model Figure 2 ;

[0030] Figure 12 The U-shaped backrest tube adjustment diagram in this utility model Figure 3 ;

[0031] Figure 13 The overall structure of the utility model is folded Figure 1 ;

[0032] Figure 14 The overall structure of the utility model is folded Figure 2 ;

[0033] Figure 15 The overall structure of the utility model is folded Figure 3 .

[0034] In the figure: 1. Front leg tube; 2. Push-down handle tube; 3. Push-up handle tube; 4. Locking joint; 5. One-hand control button; 6. Roof tube; 7. Large joint; 8. Rear leg tube; 9. Front wheel; 10. Rear wheel; 11. Handrail tube; 12. Leg support tube; 13. Seat frame tube; 14. U-shaped backrest tube; 15. Backrest latch; 16. Backrest latch; 17. Seat frame support tube; 18. Bending joint 1; 19. Bending joint 2; 20. Base frame connecting tube; 21. Support connecting tube; 22. First connecting plate; 23. Second connecting plate; 24. Slot; 25. Limiting arc groove; 26. Raised part; 27. Fastening sleeve; 28. Third connecting plate. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Combine Figures 1 to 15 Describing this embodiment, this embodiment provides a baby stroller with an automatic unlocking and detaching function of a backrest group, which includes a frame body, a seat body and a transmission structure. The frame body has two states: unfolded and folded. The frame body includes a front leg tube 1, a lower push handle tube 2 and an upper push handle tube 3. The lower push handle tube 2 and the upper push handle tube 3 are connected by a locking joint 4. The upper push handle tube 3 is provided with a one-hand control button 5. The one-hand control button 5 is used to unlock the locking joint 4 so that the front leg tube 1, the lower push handle tube 2 and the upper push handle tube 3 can be folded and unfolded. There are two symmetrical locking joints 4. A shelf tube 6 is installed between the two locking joints 4. After the one-hand control button 5 unlocks the locking joint 4, the shelf tube 6 can rotate. The main frame further includes a large joint 7, a rear leg tube 8, a front wheel 9, and a rear wheel 10. The front wheel 9 is mounted on the front leg tube 1, and the rear wheel 10 is mounted on the rear leg tube 8. The front leg tube 1, the rear leg tube 8, and the lower push handle tube 2 are connected together via the large joint 7, and the large joint 7 is mounted with a handrail tube 11. The main frame includes but is not limited to the above structure. Other structures not described are conventional structures. The main frame can realize the three-fold folding of the front leg tube 1, the lower push handle tube 2, and the upper push handle tube 3, and can be unlocked by a single-handed control button 5.

[0037] like Figure 4 、 9 The seat body includes a leg rest tube 12, a seat frame tube 13 and a U-shaped backrest tube 14 which are connected in sequence. The lower end of the U-shaped backrest tube 14 is provided with a backrest latch 15, and the rear end of the seat frame tube 13 is movably connected with a backrest holder 16. The backrest latch 15 cooperates with the backrest holder 16 to realize the locking and unlocking of the U-shaped backrest tube 14; a seat frame support tube 17 is fixedly connected to the front leg tube 1, and the seat frame tube 13 is installed on the seat frame support tube 17. The leg rest tube 12 and the seat frame tube 13 are connected by a bending joint 18, and the seat frame tubes 13 on both sides are connected by a bending joint 2 19. When folded, the leg rest tube 12 and the seat frame tube 13 are folded together through the bending joint 2 19 to realize the folding and retraction of the seat body.

[0038] like Figure 2-9 As shown, the transmission structure links the front leg tube 1, the upper push handle tube 3 and the backrest holder 16. When the upper push handle tube 3 is unlocked and pushed, the front leg tube 1, the lower push handle tube 2 and the backrest holder 16 are driven to rotate synchronously, so that the backrest tenon 15 and the backrest holder 16 are unlocked. Specifically, the transmission structure includes a base connecting tube 20, a support connecting tube 21, a first connecting piece 22 and a second connecting piece 23. The base connecting tube 20 and the support connecting tube 21 are rotatably connected at one end close to each other, and the other end of the base connecting tube 20 is rotatably connected to the front leg tube 1, and the other end of the support connecting tube 21 is rotatably connected to the upper push handle tube 3. The first connecting piece 22 is rotatably connected to one end of the second connecting piece 23, and the connection is shaped The second rotation point B is formed, the other end of the second connecting piece 23 is rotatably connected to the support connecting tube 21, and the connection forms a first rotation point A. The other end of the first connecting piece 22 is rotatably connected to the backrest holder 16, and the connection forms a third rotation point C. The position of the second connecting piece 23 away from the end is rotatably connected to the end of the seat frame tube 13 close to the U-shaped backrest tube 14, and the connection forms a fourth rotation point D. The lower end of the U-shaped backrest tube 14 is fixedly connected with a fastening sleeve 27, and the fastening sleeve 27 and the backrest holder 16 are movably connected through the third connecting piece 28. The connection between the third connecting piece 28 and the backrest holder 16 is rotatably connected to the seat frame tube 13, and the connection forms a fifth rotation point E. The backrest holder 16 is provided with two slots 24 and a limiting arc slot 25. When the backrest tenon 15 is located in different slots 24, different angles of the U-shaped backrest tube 14 can be adjusted. The slots 24 are not limited to two. When multi-angle adjustment is required, more slots 24 can be provided, such as three or five. When the backrest tenon 15 is located in the limiting arc slot 25, the backrest tenon 15 and the backrest holder 16 are completely unlocked. At this time, the U-shaped backrest tube 14 and the seat frame tube 13 are parallel. The U-shaped backrest tube 14 is pulled by the cloth cover to facilitate the baby to lie flat. A protrusion 26 is provided on one side of the backrest holder 16. After the backrest tenon 15 and the backrest holder 16 are locked, the protrusion 26 abuts against the seat frame tube 13 to limit the backrest holder 16 and prevent the backrest holder 16 from rotating.

[0039] The adjustment method is as follows: press and hold the one-hand control button 5 to unlock the locking joint 4, and push the upper handle tube 3 forward. At this time, the lower handle tube 2 rotates downward, and the front leg tube 1 retracts inward, driving the chassis connecting tube 20 to rotate upward. At this time, the support connecting tube 21 rotates clockwise. The first rotation point A on the support connecting tube 21 will drive the second connecting piece 23 to rotate counterclockwise. When the second connecting piece 23 rotates counterclockwise, it drives the first connecting piece 22 to rotate clockwise through the fourth rotation point D and the second rotation point B. When the first connecting piece 22 rotates, it pushes the backrest bracket 16 to rotate downward around the fifth rotation point E, so that the backrest bracket 16 is disengaged from the backrest tenon 15. Figure 10-12 Thus, the backrest latch 15 is automatically unlocked from the backrest seat 16, as shown Figure 8 As shown. Press the upper handlebar tube 3 downward again, and the backrest holder 16 continues to rotate downward clockwise under the combined action of the first connecting piece 22 and the second connecting piece 23. The entire U-shaped backrest tube 14 will automatically fall off and become parallel to the seat tube, allowing the baby to lie flat. At the same time, push the upper handlebar tube 3 backward to lock the main frame. After the latch automatically unlocks from the backrest holder 16, push the U-shaped backrest tube 14 forward and backward to adjust the backrest angle, and then push the upper handlebar tube 3 backward again to lock the main frame, completing the backrest angle adjustment.

[0040] like Figure 13-15 As shown, after the latch automatically unlocks from the backrest retainer 16, continue pressing the upper handlebar tube 3 downward, causing the front leg tube 1 to move toward the rear leg tube 8. The lower handlebar tube 2 and the upper handlebar tube 3 bend toward the rear leg tube 8. Simultaneously, the seat frame tube 13 folds at the second bending joint 19, and the U-shaped backrest tube 14 folds downward toward the rear leg tube 8, completing the folding and retraction of the stroller. The entire backrest assembly automatically unlocks and releases, completing the folding of the stroller frame. When the stroller is in normal use, the components are locked together and cannot rotate, ensuring safety and reliability.

[0041] The utility model links the frame body and the backrest tube on the seat body together through a transmission structure, so that the backrest angle can be adjusted with one hand during use, and it is automatically unlocked and detached when the stroller is folded, and there is no need to break the backrest tube or manually adjust the backrest to a suitable angle. The operation is simple and the adjustment is convenient. The backrest can be adjusted during use, and the stroller can be quickly folded and folded.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A baby stroller with a backrest assembly that automatically unlocks and falls off, characterized in that: It includes: The frame body has two states: expanded and folded. The frame body includes a front leg tube, a lower push handle tube, and an upper push handle tube. The lower push handle tube and the upper push handle tube are connected by a locking joint. The upper push handle tube is provided with a single-handed control button for unlocking the locking joint, so that the front leg tube, the lower push handle tube, and the upper push handle tube can be folded and expanded. The seat body comprises a leg support tube, a seat frame tube and a U-shaped backrest tube which are sequentially connected. The lower end of the U-shaped backrest tube is provided with a backrest latch. The rear end of the seat frame tube is movably connected to a backrest holder. The backrest latch cooperates with the backrest holder to achieve locking and unlocking of the U-shaped backrest tube. The transmission structure links the front leg tube, the upper push handle tube and the backrest seat. When the upper push handle tube is unlocked and pushed, the front leg tube, the lower push handle tube and the backrest seat are driven to rotate synchronously, so that the backrest tenon and the backrest seat are unlocked.

2. The baby stroller with the function of automatically unlocking and removing the backrest assembly according to claim 1, characterized in that: The frame body also includes a large joint, a rear leg tube, a front wheel and a rear wheel, the front wheel is installed on the front leg tube, the rear wheel is installed on the rear leg tube, the front leg tube, the rear leg tube and the push-down handle tube are connected together through the large joint, and the handrail tube is installed on the large joint.

3. The baby stroller with the function of automatically unlocking and removing the backrest assembly according to claim 2, characterized in that: There are two symmetrical locking joints, and a shelf pipe is installed between the two locking joints. After the locking joints are unlocked by the single-handed control button, the shelf pipe can rotate.

4. The baby stroller with the function of automatically unlocking and removing the backrest assembly according to claim 1, characterized in that: The front leg tube is fixedly connected to a seat frame support tube, and the seat frame tube is installed on the seat frame support tube.

5. The baby stroller with the function of automatically unlocking and removing the backrest assembly according to claim 1, characterized in that: The leg support tube and the seat frame tube are connected via a first bending joint, and the seat frame tubes on both sides are connected via a second bending joint. When folded, the leg support tube and the seat frame tube are folded together via the second bending joint.

6. The baby stroller with the function of automatically unlocking and removing the backrest assembly according to claim 1, characterized in that: The transmission structure includes a base frame connecting tube, a support connecting tube, a first connecting plate and a second connecting plate, wherein the base frame connecting tube and the support connecting tube are rotatably connected at one end close to each other, the other end of the base frame connecting tube is rotatably connected to the front leg tube, the other end of the support connecting tube is rotatably connected to the upper push handle tube, the first connecting plate is rotatably connected to one end of the second connecting plate, the other end of the second connecting plate is rotatably connected to the support connecting tube, the position of the second connecting plate away from the end is rotatably connected to one end of the seat frame tube close to the U-shaped backrest tube, and the other end of the first connecting plate is rotatably connected to the backrest seat.

7. The baby stroller with the function of automatically unlocking and removing the backrest assembly according to claim 6, characterized in that: The lower end of the U-shaped backrest tube is fixedly connected with a fastening sleeve, and the fastening sleeve is movably connected to the backrest holder through a third connecting piece. The connection between the third connecting piece and the backrest holder is rotatably connected to the seat frame tube.

8. The baby stroller with the function of automatically unlocking and removing the backrest assembly according to claim 1, characterized in that: The backrest seat is provided with at least two clamping grooves and a limiting arc groove.

9. The baby stroller with the function of automatically unlocking and removing the backrest assembly according to claim 1, characterized in that: A protrusion is provided on one side of the backrest holder. After the backrest tenon is locked with the backrest holder, the protrusion abuts against the seat frame tube.

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