Baby carriage

Abstract

The utility model belongs to the technical field of baby carriages, and particularly relates to a baby carriage. A baby carriage includes: a backrest; the headrest is mounted on the backrest; the height adjusting mechanism is arranged between the headrest and the backrest and comprises a gear strip which is fixedly mounted on the backrest, the gear strip extends in the vertical direction, a plurality of gear grooves which are arranged at intervals in the vertical direction are formed in the side face of the gear strip, and the gear grooves are formed in a transverse opening manner; the gear shifting assembly is fixedly mounted on the headrest and is opposite to the gear strip; the driving piece comprises a driving rod capable of moving in the vertical direction and a handle located on the outer side of the gear shifting assembly; the telescopic piece can elastically stretch out and draw back in the transverse direction; and the linkage structure is connected between the driving rod and the telescopic piece. The utility model has the advantages of better durability and stronger positioning stability.

Description

Technical Field

[0001] This utility model belongs to the field of baby stroller technology, and in particular relates to a baby stroller. Background Technology

[0002] Existing strollers are equipped with headrest height adjustment mechanisms (such as those disclosed in CN202420865033.1) to accommodate the different head support positions required by infants during their growth. Height adjustment is achieved by setting an elastically deformable locking pin and an adjustment rail with gears between the headrest and the stroller frame.

[0003] However, strollers are typically used for 2-3 years (covering the infant's 0-3 year age range). During this long and frequent use, the engagement structure between the locking pin and the gear teeth repeatedly undergoes cycles of friction, compression, and elastic deformation, easily leading to two key problems: First, mechanical wear causes contact surface damage and increased clearance; second, the locking pin may undergo plastic deformation or fatigue loosening, thus weakening its restoring force. These problems accumulate and cause the performance of the adjustment mechanism to deteriorate: First, the engagement fails (loosens), manifested as the headrest not locking effectively after adjustment, easily slipping or drooping when pushed or when the infant moves; second, positioning is inaccurate (inaccurate adjustment), even without obvious slippage, increased clearance or insufficient locking force will cause micro-displacement when the infant leans against it, causing the actual support height of the headrest to deviate from the preset position, failing to accurately adapt to the infant's needs. Utility Model Content

[0004] To address the shortcomings of existing technologies, a stroller with better durability and stronger positioning stability is provided.

[0005] This utility model is achieved by the following technical solution: a baby stroller, comprising:

[0006] Backrest;

[0007] A headrest that can be slidably mounted on the upper end of the backrest along the vertical direction of the backrest;

[0008] A height adjustment mechanism is disposed between the headrest and the backrest, the height adjustment mechanism comprising:

[0009] A shift bar is fixedly installed on one of the backrest or the headrest. The shift bar extends vertically and has several shift grooves arranged vertically at intervals on its side. The shift grooves are set with horizontal openings.

[0010] A gear adjustment component is fixedly installed on another of the headrests or the backrests, and is positioned opposite to the gear shift bar; the gear adjustment component includes:

[0011] The drive unit includes a vertically movable drive rod and a handle located outside the gear shifting assembly;

[0012] A telescopic component that can elastically expand and contract laterally;

[0013] A linkage structure connects the drive rod and the telescopic component;

[0014] In its natural state, the telescopic member extends outward under the action of elastic force and inserts into the corresponding stop slot to lock the height of the headrest on the backrest.

[0015] When the handle is operated to drive the drive rod to move vertically, the linkage structure converts the vertical movement of the drive rod into a lateral inward pulling force applied to the telescopic member, forcing the telescopic member to overcome the elastic force and retract inward to disengage from the stop groove, thereby releasing the lock on the headrest and allowing the headrest to slide vertically on the backrest for height adjustment.

[0016] When in use, the user can press or pull the handle to make the drive rod of the drive component move vertically, thereby causing the telescopic component to retract inward and disengage from the position slot. At this time, the vertical position of the headrest can be moved. When the headrest is adjusted to a suitable height, the handle can be released. At this time, the telescopic component will extend outward and reset under the action of the spring force and insert into the corresponding position slot to lock the headrest in the current position on the backrest.

[0017] This solution utilizes a locking mechanism where the telescopic component directly extends into the gear slot, significantly reducing mechanical wear during operation compared to existing elastic locking mechanisms. The telescopic component is less prone to plastic deformation during extension and retraction, exhibiting stronger resistance to deformation. Therefore, even after repeated adjustments over a stroller's two-year lifespan, the height adjustment mechanism effectively maintains its initial locking effect and positioning accuracy, demonstrating superior long-term durability and operational stability.

[0018] The linkage structure can be a linkage structure, such as a linkage hinged between the drive rod and the telescopic component. When the drive rod moves vertically, it will pull the telescopic component to retract inward. Alternatively, it can be a compression structure, in which the telescopic component retracts by pressing two wedge blocks against each other.

[0019] Preferably, the linkage structure includes:

[0020] A first mating groove is formed on the drive rod, and the first mating groove passes through the side of the drive rod in a direction perpendicular to the axial direction of the drive rod.

[0021] The second mating groove is formed on the telescopic member. The second mating groove passes through the side of the telescopic member in a direction perpendicular to the axial direction of the telescopic member, and its passing direction is orthogonal to the passing direction of the first mating groove.

[0022] The first and second mating grooves are nested together to make the drive rod and the telescopic member perpendicularly staggered; a laterally extending pressing part is provided on the groove wall of the first and / or the groove wall of the second mating groove; when the drive rod moves in the vertical direction, the pressing part can exert a pressing effect on the opposite groove wall, thereby forcing the telescopic member to retract inward in the lateral direction.

[0023] The linkage structure achieves the retraction of the telescopic component by setting a mating groove and a pressing part. This design method allows for a more compact mechanism and does not take up too much space in the backrest or headrest. The pressing part can be a sphere, hemisphere, wedge, etc.

[0024] Preferably, the extrusion part is provided on the wall of the first mating groove and the wall of the second mating groove, and the extrusion part is wedge-shaped.

[0025] The wedge-shaped extrusion section has an inclined surface, which serves as a guide, facilitating the retraction movement of the telescopic rod when it is compressed.

[0026] Preferably, the gear adjustment component is disposed on the headrest, and the headrest has a vertically extending vertical slide groove and a horizontally extending horizontal slide groove inside, the vertical slide groove and the horizontal slide groove are interconnected, the drive rod is slidably fitted in the vertical slide groove, and the telescopic member is slidably fitted in the horizontal slide groove.

[0027] Placing the adjustment mechanism on the headrest allows for a shorter vertical slide rail, simplifying the manufacturing process. Placing it on the backrest necessitates a longer vertical slide rail, increasing manufacturing complexity. The vertical and horizontal slide rails guide the sliding direction of the drive rod and telescopic components.

[0028] Preferably, the vertical slide groove is provided with a first elastic element, which applies an elastic force to the drive rod to reset the drive rod; the transverse slide groove is provided with a second elastic element, which applies an outward elastic force to the telescopic element.

[0029] The aforementioned elastic element facilitates the repositioning of the drive rod and telescopic component.

[0030] Preferably, the vertical groove and the horizontal groove are respectively provided with a vertically extending vertical abutment protrusion and a horizontally extending horizontal abutment protrusion, the end of the first elastic member is sleeved on the vertical abutment protrusion, and the end of the second elastic member is sleeved on the horizontal abutment protrusion.

[0031] By setting abutment protrusions, the deformation of the elastic element can be guided, allowing the driving and telescopic elements to be reset more effectively.

[0032] Preferably, the headrest has a vertically extending limiting groove, and the cross-section of the limiting groove is T-shaped or L-shaped.

[0033] The backrest is fixedly provided with a laterally extending limiting member, the cross-section of which is T-shaped or L-shaped and is slidably fitted into the limiting groove.

[0034] The extended end of the limiting member constitutes the stop bar, and the stop bar is provided with the plurality of stop grooves.

[0035] The transverse slide is connected to the limiting groove, allowing the telescopic member to extend into the limiting groove and cooperate with the gear groove on the gear bar.

[0036] Integrating the gear shift bar and the limit component into one unit can make the structure more compact and the processing more convenient.

[0037] Preferably, there are two limiting grooves, which are symmetrically arranged on opposite sides of the headrest.

[0038] Accordingly, there are two limiting members, which are fixed to opposite sides of the backrest respectively;

[0039] The number of telescopic components is two, and they are arranged vertically at intervals in the transverse sliding groove, with each telescopic component extending into one of the limiting grooves respectively;

[0040] The linkage structure is configured such that when the driving component is operated, the two telescopic components are simultaneously driven to retract laterally inward.

[0041] The above settings make the headrest more stable when moving vertically.

[0042] Preferably, adjustable headrest wing plates are provided on opposite sides of the headrest, and each headrest wing plate is rotatably connected to the main body of the headrest through a damping hinge;

[0043] Adjustable backrest wing plates are provided on opposite sides of the backrest, and each backrest wing plate is rotatably connected to the main body of the backrest through a damping hinge.

[0044] By utilizing the torque damping characteristics of the damping hinge, the headrest and backrest wings generate continuous resistance during rotational adjustment, allowing them to be stably suspended at any adjustment angle. This design enables stepless adjustment of the lateral head and body support angles for the infant, and ensures that the adjusted positions of the headrest and backrest wings remain stable during vehicle movement or infant activity, eliminating the risk of accidental displacement due to inertia associated with ordinary hinges.

[0045] Preferably, the stroller includes a frame, and a light is provided at the bottom front end of the frame.

[0046] Lighting can illuminate the stroller when pushing it at night, improving safety.

[0047] Compared with existing technologies, the advantages of this invention are as follows: This solution, through a locking method where the telescopic component directly extends into the gear slot, significantly reduces mechanical wear during operation compared to existing elastic locking structures. The telescopic component is less prone to plastic deformation during extension and retraction, exhibiting stronger resistance to deformation. Therefore, even after repeated adjustments over a stroller's two-year lifespan, the height adjustment mechanism can effectively maintain its initial locking effect and positioning accuracy, demonstrating superior long-term durability and operational stability. Attached Figure Description

[0048] Figure 1 This is a structural diagram of a stroller;

[0049] Figure 2 for Figure 1 A schematic diagram of the backrest structure;

[0050] Figure 3 This is a schematic diagram of the gear shift bar structure;

[0051] Figure 4 A schematic diagram of the height adjustment mechanism after removing the headrest wall;

[0052] Figure 5 for Figure 4 An enlarged view of the height adjustment mechanism;

[0053] Figure 6 This is a side view of the headrest;

[0054] Figure 7 This is a schematic diagram of the structure after the cover plate has been removed;

[0055] Figure 8 This is a schematic diagram of the structure after removing the gear adjustment component;

[0056] Figure 9 A cross-sectional view of the height adjustment mechanism;

[0057] Figure 10 This is a structural diagram of the gear shifting component;

[0058] Figure 11 This is a structural diagram of the driving component and the telescopic component.

[0059] Reference numerals: 1. Frame; 11. Light; 2. Seat; 3. Backrest; 31. Backrest flap; 4. Headrest; 41. Headrest flap; 42. Cover; 43. Limiting groove; 44. Vertical sliding groove; 441. Vertical abutment protrusion; 45. Lateral sliding groove; 451. Lateral abutment protrusion; 5. Drive component; 51. Handlebar; 52. Drive rod; 521. First mating groove; 53. First elastic component; 6. Gear bar; 61. Gear groove; 7. Telescopic component; 71. Second elastic component; 72. Second mating groove; 8. Extrusion part; 9. Limiting component. Detailed Implementation

[0060] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0061] like Figure 1 As shown, this embodiment discloses a stroller, which includes a frame 1. A light 11 is provided at the bottom front end of the frame 1. A seat 2 and a backrest 3 are provided on the frame 1. Adjustable backrest wing panels 31 are respectively provided on opposite sides of the backrest 3. The backrest wing panels 31 correspond to the left and right sides of the baby. Each backrest wing panel 31 is rotatably connected to the main body of the backrest 3 through a damping hinge (not shown in the figure).

[0062] like Figure 2 As shown, a headrest 4 that can slide vertically is provided at the upper end of the backrest 3. The headrest 4 corresponds to the back of the baby's head, so that the headrest can support and lean against the baby's head when the baby is in the stroller. Adjustable headrest wing plates 41 are provided on the left and right sides of the headrest 4 respectively; each headrest wing plate 41 is rotatably connected to the main body of the headrest 4 through a damping hinge.

[0063] like Figure 3 and Figure 7 As shown, the headrest 4 is located on the front side of the backrest 3. The backrest 3 has two limiting members 9 extending towards the headrest 4, spaced apart in the left-right direction. The cross-sectional shape of each limiting member 9 is L-shaped, and the front end of each limiting member 9 forms a stop bar 6. The stop bar 6 has several stop grooves 61 evenly spaced vertically, with horizontal openings. The headrest 4 has a limiting groove 43 for the limiting members 9 to insert into, also L-shaped in cross-section. The front end of each limiting member 9 slides into the limiting groove 43. This allows the headrest 4 to slide vertically on the backrest 3 while its front-back position is limited.

[0064] In some other embodiments, the cross-section of the limiting member 9 may also be T-shaped, and the cross-section of the limiting groove 43 may also be T-shaped.

[0065] like Figures 4 to 11 As shown, a height adjustment mechanism is provided between the backrest 3 and the headrest 4. The height adjustment mechanism includes the aforementioned stop bar 6 and an adjustment assembly disposed on the headrest 4. The adjustment assembly is fixed to the headrest 4 by a cover plate 42 and screws.

[0066] The gear shifting assembly includes a drive unit 5 and a telescopic unit 7. The drive unit 5 includes a vertically extending drive rod 52 and a handle 51 protruding from the upper end of the headrest 4.

[0067] The headrest 4 is provided with a vertically extending vertical slide groove 44 and a horizontally extending horizontal slide groove 45. There are two horizontal slide grooves 45, which are spaced apart in the vertical direction. Both horizontal slide grooves 45 are connected to the vertical slide groove 44 and the limiting groove 43. The drive rod 52 can slide in the vertical slide groove 44 in the vertical direction, and the telescopic member 7 can slide in the horizontal slide groove 45 in the horizontal direction.

[0068] A vertically extending vertical abutment protrusion 441 is provided in the vertical slide groove 44, and a vertically extending clearance groove is provided in the drive rod 52. The first elastic element 53 is located in the clearance groove of the drive rod 52. The first elastic element 53 is a compression spring. The lower end of the first elastic element 53 is sleeved on the vertical abutment protrusion 441, and the upper end abuts against the drive rod 52 so that the drive rod 52 applies an upward elastic force.

[0069] The telescopic member 7 has a T-shaped longitudinal section. Both the telescopic member 7 and the transverse slide 45 are provided with transversely extending transverse abutment protrusions 451. Each telescopic member 7 is equipped with two second elastic members 71. The second elastic members 71 are compression springs. The second elastic members 71 extend in the transverse direction and one end of the second elastic member 71 is sleeved on the transverse abutment protrusion 451 of the transverse slide 45, and the other end abuts against the transverse abutment protrusion 451 of the telescopic member 7. This allows the second elastic members 71 to apply a transverse elastic force to the telescopic member 7, causing the telescopic member 7 to slide toward its respective connected limiting groove 43. This allows the head of the telescopic member 7 to extend into the limiting groove 43 and be inserted into the stopping groove 61 of the stopping bar 6, thereby locking the height of the headrest 4 on the backrest 3.

[0070] like Figure 7 , Figure 9 , Figure 10 and Figure 11As shown, a linkage structure is provided between the drive rod 52 and the telescopic member 7. The linkage structure includes a first mating groove 521 formed on the drive rod 52, which extends through the side of the drive rod 52 in a direction perpendicular to the axial direction of the drive rod 52. The linkage structure also includes a second mating groove 72 formed on the telescopic member 7, which extends through the side of the telescopic member 7 in a direction perpendicular to the axial direction of the telescopic member 7, and its extension direction is orthogonal to the extension direction of the first mating groove 521.

[0071] The first mating groove 521 and the second mating groove 72 are nested together, so that the drive rod 52 and the telescopic member 7 are arranged perpendicularly and alternately. Laterally extending pressing parts 8 are provided on the groove walls of the first mating groove 521 and the second mating groove 72. The pressing parts 8 are wedge-shaped. When the handle 51 is pressed down, the drive rod 52 moves downward in the vertical direction. The pressing parts 8 of the first mating groove 521 and the second mating groove 72 press against each other, thereby forcing the two telescopic members 7 to retract inward in the horizontal direction simultaneously. This causes the heads of the telescopic members 7 to retract into the horizontal sliding groove 45 and disengage from the engagement with the stop groove 61, thereby releasing the lock on the headrest 4 and allowing the headrest 4 to slide vertically on the backrest 3 for height adjustment.

[0072] In some other embodiments, the handle 51 can function as a lever, meaning the operator needs to pull the handle 51 upwards to use it. When the handle 51 is used as a lever, the direction of the internal pressing part 8 needs to be adjusted accordingly so that when the handle 51 is pulled upwards, the telescopic member 7 retracts inwards. (Not shown in the figure)

[0073] In some other embodiments, the height adjustment component and the limiting groove 43 can be disposed inside the backrest 3, and the limiting member 9 can be disposed on the headrest 4, which can also achieve the effect of height adjustment of the headrest 4. The components and structure of this method are roughly the same, so they will not be described in detail here.

[0074] When the user needs to adjust the height of the headrest 4, they can press the handle 51. The head of the telescopic component 7 retracts into the horizontal slide groove 45 and disengages from the stop groove 61, thereby releasing the lock on the headrest 4. This allows the headrest 4 to slide vertically along the backrest 3 for height adjustment. After adjusting to the appropriate height, releasing the handle 51 will cause the telescopic component 7 to reset under the action of the elastic element, thus completing the locking process. This is very convenient. When it is necessary to adjust the headrest wing plate 41 and the backrest wing plate 31, simply rotate the headrest wing plate 41 and the backrest wing plate 31. The damping hinges allow the headrest wing plate 41 and the backrest wing plate 31 to be stably suspended at any adjustment angle.

Claims

1. A baby stroller, characterized in that, include: Backrest; A headrest that can be slidably mounted on the upper end of the backrest along the vertical direction of the backrest; A height adjustment mechanism is disposed between the headrest and the backrest, the height adjustment mechanism comprising: A shift bar is fixedly installed on one of the backrest or the headrest. The shift bar extends vertically and has several shift grooves arranged vertically at intervals on its side. The shift grooves are set with horizontal openings. A gear adjustment component is fixedly installed on another of the headrests or the backrests, and is positioned opposite to the gear shift bar; the gear adjustment component includes: The drive unit includes a vertically movable drive rod and a handle located outside the gear shifting assembly; A telescopic component that can elastically expand and contract laterally; A linkage structure connects the drive rod and the telescopic component; In its natural state, the telescopic member extends outward under the action of elastic force and inserts into the corresponding stop slot to lock the height of the headrest on the backrest. When the handle is operated to drive the drive rod to move vertically, the linkage structure converts the vertical movement of the drive rod into a lateral inward pulling force applied to the telescopic member, forcing the telescopic member to overcome the elastic force and retract inward to disengage from the stop groove, thereby releasing the lock on the headrest and allowing the headrest to slide vertically on the backrest for height adjustment.

2. The stroller according to claim 1, characterized in that, The linkage structure includes: A first mating groove is formed on the drive rod, and the first mating groove passes through the side of the drive rod in a direction perpendicular to the axial direction of the drive rod. The second mating groove is formed on the telescopic member. The second mating groove passes through the side of the telescopic member in a direction perpendicular to the axial direction of the telescopic member, and its passing direction is orthogonal to the passing direction of the first mating groove. The first and second mating grooves are nested together to make the drive rod and the telescopic member perpendicularly staggered; a laterally extending pressing part is provided on the groove wall of the first and / or the groove wall of the second mating groove; when the drive rod moves in the vertical direction, the pressing part can exert a pressing effect on the opposite groove wall, thereby forcing the telescopic member to retract inward in the lateral direction.

3. The stroller according to claim 2, characterized in that: The extrusion section is provided on the wall of the first mating groove and the wall of the second mating groove. The extrusion section is wedge-shaped.

4. The stroller according to claim 1, characterized in that: The gear adjustment component is mounted on the headrest, which has a vertically extending vertical groove and a horizontally extending horizontal groove. The vertical groove and the horizontal groove are interconnected. The drive rod is slidably fitted in the vertical groove, and the telescopic component is slidably fitted in the horizontal groove.

5. The stroller according to claim 4, characterized in that: The vertical slide groove is provided with a first elastic element, which applies an elastic force to the drive rod to reset the drive rod; the horizontal slide groove is provided with a second elastic element, which applies an outward elastic force to the telescopic element.

6. The stroller according to claim 5, characterized in that: The vertical and horizontal sliding grooves are respectively provided with vertically extending vertical abutment protrusions and horizontally extending horizontal abutment protrusions. The end of the first elastic member is sleeved on the vertical abutment protrusion, and the end of the second elastic member is sleeved on the horizontal abutment protrusion.

7. The stroller according to claim 4, characterized in that: The headrest has a vertically extending limiting groove, and the cross-section of the limiting groove is T-shaped or L-shaped. The backrest is fixedly provided with a laterally extending limiting member, the cross-section of which is T-shaped or L-shaped and is slidably fitted into the limiting groove. The extended end of the limiting member constitutes the stop bar, and the stop bar is provided with the plurality of stop grooves. The transverse slide is connected to the limiting groove, allowing the telescopic member to extend into the limiting groove and cooperate with the gear groove on the gear bar.

8. The stroller according to claim 7, characterized in that: The number of limiting grooves is two, and they are symmetrically opened on opposite sides of the headrest; Accordingly, there are two limiting members, which are fixed to opposite sides of the backrest respectively; The number of telescopic components is two, and they are arranged vertically at intervals in the transverse sliding groove, with each telescopic component extending into one of the limiting grooves respectively; The linkage structure is configured such that when the driving component is operated, the two telescopic components are simultaneously driven to retract laterally inward.

9. The stroller according to any one of claims 1 to 8, characterized in that: The headrest is provided with adjustable headrest wing plates on opposite sides, and each headrest wing plate is rotatably connected to the main body of the headrest through a damping hinge. Adjustable backrest wing plates are provided on opposite sides of the backrest, and each backrest wing plate is rotatably connected to the main body of the backrest through a damping hinge.

10. The stroller according to any one of claims 1 to 8, characterized in that: The stroller includes a frame, and a light is provided at the bottom front end of the frame.

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