stroller frame

Abstract

A stroller frame characterized in that it comprises a push rod assembly (3) as well as a front support rod (1) and a rear support rod (2), each connected to wheels (100), wherein a connecting seat (21) is fixedly arranged at the upper end of the rear support rod (2), a first connecting section (11) is fixedly arranged at the upper end of the front support rod (1), a second connecting section (32) is fixedly arranged at the lower end of the push rod assembly (3), and a connector (22) is arranged on the inside of the connecting seat (21) which is detachably connected to a seat assembly (4), wherein the first connecting section (11) is pivotably connected to the connecting seat (21) about a first axis (A), and the second connecting section (32) is pivotably connected to the connecting seat (21) about a second axis (B).A connecting rod (5) is arranged between the first connecting section (11) and the second connecting section (32), which is pivotably connected to both and is able to move the front support rod (1) to rotate and fold it towards the rear support rod (2) when the pushrod assembly (3) is rotated and folded relative to the rear support rod (2), wherein the connecting rod (5) is rotatably connected at one end about a third axis (C) to the first connecting section (11) and the connecting rod (5) is rotatably connected at the other end about a fourth axis (D) to the second connecting section (32), the first connecting section (11) and the second connecting section (32) are each provided with a detent locking position (61), and the connecting seat (21) is further provided with a detent locking element (62) that can be displaced relative thereto.to simultaneously engage or disengage from the individual detent locking positions (61), wherein the detent locking element (62) is provided with a first release section (63) that projects from the connecting seat (21) and can be pressed through a seat section (41) of the seat assembly (4) to release the detent locking element (62) from the detent locking positions (61) when the seat assembly (4) is rotated and folded towards the front support rod (1), and a first return spring (64) is arranged between the detent locking element (62) and the connecting seat (21) which is able to push the detent locking element (62) back into position.

Description

Technical field

[0001] The present utility model relates to a stroller frame. State of the art

[0002] Strollers are common products for growing infants and toddlers. Modern strollers can usually be folded and unfolded. When unfolded, the child can use the stroller for rides, while when folded, it can be easily stored or carried.

[0003] The Chinese utility model with publication number CN221188720U is a preliminary patent filed by the applicant in 2023. This patent discloses a stroller. The key technical solution is that the locking mechanisms between the front legs, rear legs, and support bars are moved to unlock when the seat is rotated relative to the mounting base and folded, thus making the folding process of the stroller convenient. However, the design of this stroller has the following disadvantages: Unlocking the locking mechanism after removing the seat from the mounting base is cumbersome because the exposed portion of the release tab that interacts with the seat to unlock it is too small to be easily operated by an adult. Furthermore, to avoid interference or inconvenience during rotation and unfolding, the design...To prevent the seat from folding, the release tab is not large enough for an adult to easily operate. Therefore, this solution does not meet the requirements for conveniently folding the front legs, rear legs, and support bars after removing the seat. In fact, infants and toddlers are placed flat in a bassinet after birth. When traveling, the bassinet is mounted on a stroller frame and pushed by an adult. Beyond a certain age, the bassinet is no longer suitable for children. When traveling, a seat can be mounted on the stroller frame in which the child sits.However, if the aforementioned patented technical solution is connected to the baby bassinet on the mounting seat, the baby bassinet cannot move the locking mechanism between the front legs, rear legs, and support bars to unlock it, and there is no other unlocking component that can independently actuate the locking mechanism. Therefore, the aforementioned patented technical solution is not suitable for connecting the baby bassinet to the stroller frame, which limits the product's application.

[0004] Therefore, the present utility model is being developed due to the aforementioned deficiencies. Disclosure of the utility model

[0005] The present utility model aims to remedy the shortcomings of the prior art and to provide a stroller frame that allows for easy unlocking and folding as well as a wide range of applications.

[0006] The present utility model is solved by the following technical solutions: A pram frame comprising a push bar assembly, a front support bar, and a rear support bar, each connected to wheels, wherein a connecting seat is fixedly arranged at the upper end of the rear support bar, a first connecting section is fixedly arranged at the upper end of the front support bar, a second connecting section is fixedly arranged at the lower end of the push bar assembly, and a connector is arranged on the inside of the connecting seat, which is detachably connected to a seat assembly. wherein the first connecting section is pivotably connected to the connecting seat about a first axis, the second connecting section is pivotably connected to the connecting seat about a second axis, A connecting rod is arranged between the first connecting section and the second connecting section, which is pivotably connected to both and is able to move the front support rod to rotate and fold it towards the rear support rod when the pushrod assembly is rotated and folded relative to the rear support rod, wherein the connecting rod is rotatably connected at one end about a third axis to the first connecting section and the connecting rod is rotatably connected at the other end about a fourth axis to the second connecting section, the first connecting section and the second connecting section each being provided with a detent locking position, and the connecting seat being further provided with a detent locking element which can be moved relative to it in order to simultaneously engage or disengage from the individual detent locking positions.wherein the detent locking element is provided with a first release section which projects from the connecting seat and can be pressed through a seat section of the seat assembly to release the detent locking element from the detent locking positions when the seat assembly is rotated and folded towards the front support bar, and wherein a first return spring is arranged between the detent locking element and the connecting seat which is able to push the detent locking element back into position.

[0007] The locking element comprises a sliding seat which is slidably connected to the connecting seat, wherein the sliding seat is provided with locking pins which can be engaged in the locking positions.

[0008] The connecting seat is provided with a sliding groove that is able to guide the displacement of the locking pins.

[0009] At the lower end of the front support bar, a front crossbar is arranged, and at the lower end of the rear support bar, a rear crossbar is arranged, the front crossbar being provided with a swivel bar which is rotatable relative to it, with a flexible strap arranged between the swivel bar and the rear crossbar which is able to pull the swivel bar upwards when the stroller frame is in an unfolded state, and also a torsion spring arranged between the swivel bar and the front crossbar which is able to push the swivel bar to unfold when the stroller frame is folded.

[0010] The latching element further comprises a sliding block connected to the sliding seat, wherein the sliding block extends partially outside the connecting seat, the first release section is arranged on the sliding block, and the sliding block is further provided with a second release section that protrudes from the connecting seat and can be actuated to release the latching element from the latching positions.

[0011] The seating arrangement comprises a mounting seat which is detachably connected to the connector, wherein the seat section is rotatably connected to the mounting seat, the seat section is provided with a backrest section and an armrest section which are rotatable relative to it, wherein a locking arrangement is arranged between the mounting seat, the seat section, the backrest section and the armrest section which is capable of locking the seating arrangement in the unfolded state.

[0012] The seat section comprises a seat plate and a release section arranged on the seat plate and capable of pressing the first release section to release the detent locking element from the detent locking positions when the seat section is rotated relative to the mounting seat, wherein the release section comprises a release slide slidably connected to the seat plate and capable of pressing the first release section to move when the seat section is rotated and folded relative to the mounting seat, wherein a reset element is also arranged between the release slide and the seat plate, capable of pressing the release slide to reset, the release slide being provided with a first inclined surface, and the first release section being provided with a pressure surface capable of pressing the first inclined surface.to retract the release slider into the seat plate when the seat assembly is unfolded.

[0013] A latching arrangement is arranged between the mounting seat and the connector, capable of locking the two, the latching arrangement comprising a latching position located on the connector, and a latching block located on the mounting seat which can be laterally displaced relative thereto to engage or disengage from the latching position, the mounting seat also being connected to an actuating element which can be vertically displaced relative thereto to push the latching block for lateral displacement, a first elastic element being arranged between the latching block and the mounting seat which is capable of pushing the latching block to reset, and a second elastic element being arranged between the actuating element and the mounting seat which is capable of pushing the actuating element to reset.

[0014] A step adjustment mechanism is arranged between the seat section and the backrest section, which is capable of adjusting the inclination of the backrest section relative to the seat section, wherein the step adjustment mechanism comprises several adjustment steps arranged on the seat section, a sliding element is arranged on the backrest section which can be moved relative to it, the sliding element being provided with a detent connection section which is capable of engaging in the adjustment steps, a release element is arranged on the backrest section which is rotatable relative to it, wherein a first pull cable is arranged between the release element and the sliding element which is capable of connecting the two together, and a second return spring is arranged between the sliding element and the backrest section which is capable of pushing the sliding element back into position.

[0015] The seat section is further provided with a stop section capable of preventing the sliding element from rotating forward; a double locking arrangement is arranged between the release element and the backrest section, the double locking arrangement comprising a release button located on the release element, the release button being provided with a projection, and the backrest section being provided with a recess groove capable of accommodating the projection to pull the sliding element away from the stop section via the first pull rope, and an elastic element being arranged between the release button and the backrest section capable of pressing the projection on the release button to cause its misalignment with the recess groove.

[0016] The seating arrangement further comprises a leg rest rotatably connected to the seat section, wherein an adjustment arrangement is arranged between the leg rest and the seat section, which is capable of adjusting the angle of the leg rest relative to the seat section, wherein the adjustment arrangement comprises a left rotary housing arranged on the seat section and a right rotary housing arranged on the leg rest, wherein a detent groove is arranged in both the left rotary housing and the right rotary housing, the left rotary housing and the right rotary housing enclose a movement space, wherein a second toothing is arranged in the movement space, which is laterally movable therein and can simultaneously engage with the detent grooves of the left rotary housing and the right rotary housing, wherein an elastic component is also arranged between the second toothing and the left rotary housing.A rotary element is arranged between the second toothing and the right-hand rotary housing, which is rotatable relative to both; the right-hand rotary housing is provided with a pressure projection which is able to push the rotary element for lateral displacement when the rotary element is rotated, and the second toothing is able to disengage from the detent groove of the right-hand rotary housing when the rotary element is moved laterally; the leg rest is provided with an actuating element which is movable relative to it, wherein a second pull cable is arranged between the actuating element and the rotary element, which is able to move the rotary element when the actuating element is actuated, and an elastic return element is arranged between the actuating element and the leg rest, which is able to push the actuating element back into its original position.

[0017] Compared to the prior art, the following advantages of the present utility model are as follows: 1. When the stroller frame is to be folded, the seat section, when rotated and folded relative to the rear support bar, can push the first release section, simultaneously disengaging the latching element from its individual latching positions. In this state, the front support bar, rear support bar, and push bar assembly are unlocked from each other. When the user operates the push bar assembly, the second connecting section rotates around the second axis relative to the connecting seat, bringing the push bar assembly closer to the rear support bar. As the second connecting section rotates, it moves one end of the connecting rod, causing that end to rotate around the fourth axis, while the other end of the connecting rod is pulled and moves around the third axis relative to the first connecting section.In this state, the first connecting section, under the action of the connecting rod, can rotate around its first axis relative to the connecting seat and approach the rear support bar, allowing the entire stroller frame to be folded. Folding is extremely simple: just push the seat section so that it rotates and folds relative to the rear support bar, releasing the entire stroller's locking mechanism. Then, simply push the push rod assembly so that it rotates and approaches the rear support bar to complete the fold. Both the first and second connecting sections are each equipped with a detent locking position, and the detent locking element can be engaged simultaneously with the detent locking positions of both the first and second connecting sections.This ensures greater safety of the entire wagon frame when unfolded and reduces wobbling of the wagon frame. 2. The latching position is a latching groove, and the two locking pins can be simultaneously engaged in the latching grooves of the first and second connecting sections, making the entire wagon frame more secure when unfolded. Brief description of the drawings Fig. Figure 1 is a first perspective view of a pram frame of the present utility model after removal of a seat arrangement; Fig. Figure 2 is a second perspective view of the pram frame of the present utility model after removal of the seat assembly; Fig. Figure 3 is an enlarged view of area E in Fig. 2; Fig. Figure 4 is a first sectional view of the components of the present utility model; Fig. Figure 5 is a second sectional view of the components of the present utility model; Fig. Figure 6 is a first exploded view of the components of the present utility model; Fig. Figure 7 is a second exploded view of the components of the present utility model; Fig. Figure 8 is a side view of the present utility model in its unfolded state; Fig. Figure 9 is a side view of the present utility model during folding; Fig. Figure 10 is a perspective view of the present utility model showing the seating arrangement; Fig. Figure 11 is a first perspective view of a location of the present utility model; Fig. Figure 12 is a first exploded view of the seat of the present utility model; Fig. Figure 13 is a second exploded view of the seat of the present utility model; Fig. Figure 14 is a second perspective view of the location of the present utility model; Fig. Figure 15 is a perspective view of an interlocking of the present utility model; Fig. Figure 16 is a first perspective view of a backrest section of the present utility model; Fig. Figure 17 is a second perspective view of the backrest section of the present utility model; Fig. Figure 18 is a first exploded view of a seat section and leg rest of the present utility model; Fig. Figure 19 is a second exploded view of the seat section and leg rest of the present utility model; Fig. 20 is a perspective view of the present utility model with a baby sleeping basket; Fig. Figure 21 is a perspective view of the present utility model in its folded state. Detailed description of embodiments

[0018] The present utility model is described in more detail below in conjunction with the attached drawings: In the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16, Fig. 17, Fig. 18, Fig. 19 to Fig. Figure 20 shows a stroller frame comprising a push bar arrangement 3 as well as a front support bar 1 and a rear support bar 2, each connected to wheels 100.

[0019] A connecting seat 21 is fixedly arranged at the upper end of the rear support rod 2, a first connecting section 11 is fixedly arranged at the upper end of the front support rod 1, a second connecting section 32 is fixedly arranged at the lower end of the push rod assembly 3, and a connector 22 is arranged on the inside of the connecting seat 21, which is detachably connected to a seat assembly 4. The first connecting section 11 is pivotably connected to the connecting seat 21 about a first axis A, and the second connecting section 32 is pivotably connected to the connecting seat 21 about a second axis B.A connecting rod 5 is arranged between the first connecting section 11 and the second connecting section 32. This connecting rod 5 is pivotally connected to both sections and is capable of moving the front support rod 1 to rotate and fold it towards the rear support rod 2 when the pushrod assembly 3 is rotated and folded relative to the rear support rod 2. The connecting rod 5 is rotatably connected at one end to the first connecting section 11 about a third axis C and at the other end to the second connecting section 32 about a fourth axis D. The first connecting section 11 and the second connecting section 32 are each provided with a detent locking position 61, and the connecting seat 21 is also provided with a detent locking element 62 that can be moved relative to it to simultaneously engage or disengage from the individual detent locking positions 61.The latching element 62 is provided with a first release section 63 which projects from the connecting seat 21 and can be pressed through a seat section 41 of the seat assembly 4 in order to release the latching element 62 from the latching positions 61 when the seat assembly 4 is rotated and folded towards the front support rod 1, and a first return spring 64 is arranged between the latching element 62 and the connecting seat 21, which is able to push the latching element 62 back into position.

[0020] As in the Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. As shown in Figure 7, when the stroller frame is to be folded, the seat section 41, when rotated and folded relative to the rear support bar 2, can press the first release section 63, thereby simultaneously releasing the detent locking element 62 from its individual detent locking positions 61. In this state, the front support bar 1, the rear support bar 2, and the push bar assembly 3 are unlocked from each other. When the user operates the push bar assembly 3, the second connecting section 32 rotates about the second axis B relative to the connecting seat 21, thereby bringing the push bar assembly 3 closer to the rear support bar 2.As the second connecting section 32 rotates, it moves one end of the connecting rod 5, causing that end to rotate about the fourth axis D, while the other end of the connecting rod 5 is pulled and moves about the third axis C relative to the first connecting section 21. In this state, the first connecting section 11, under the action of the connecting rod 5, can rotate about the first axis A relative to the connecting seat 21 and approach the rear support bar 2, allowing the entire stroller frame to be folded. Folding is extremely simple: it is sufficient to push the seat section 41 so that it rotates and folds relative to the rear support bar 2, releasing the entire stroller lock. Then, it is sufficient to push the push rod assembly 3 so that it rotates and approaches the rear support bar 2 to complete the folding process.Both the first connecting section 11 and the second connecting section 32 are each provided with a detent locking position 61, whereby the detent locking element 62 can be locked simultaneously with the detent locking positions 61 of the first connecting section 11 and the second connecting section 32. This can reduce the wobbling of the wagon frame and ensures greater safety of the entire wagon frame in the unfolded state.

[0021] As in the Fig. 6 to Fig. As shown in Figure 7, the latching element 62 comprises a sliding seat 621 which is slidably connected to the connecting seat 21, the sliding seat 621 being provided with locking pins 622 which can engage in the latching positions 61. The latching position 61 is a latching groove, and the two locking pins 622 can simultaneously engage in the latching grooves of the first connecting section 11 and the second connecting section 32, thereby making the entire wagon frame more secure in the unfolded state.

[0022] As in the Fig. 6 to Fig. As shown in Figure 7, the connecting seat 21 is provided with a sliding groove 211 which is capable of guiding the displacement of the locking pins 622. The sliding groove 211 serves to guide the displacement of the locking pins 622 and to limit the travel of the detent locking element 62.

[0023] As in the Fig. 1 and Fig. As shown in Figure 21, a front crossbar 12 is arranged at the lower end of the front support bar 1, and a rear crossbar 23 is arranged at the lower end of the rear support bar 2. The front crossbar 23 is provided with a pivot rod 24, which is rotatable relative to it. A flexible strap (not shown in the figures) is arranged between the pivot rod 24 and the rear crossbar 23, which is capable of pulling the pivot rod 24 upwards when the stroller frame is in an unfolded state. A torsion spring (not shown in the figures) is also arranged between the pivot rod 24 and the front crossbar 12, which is capable of pushing the pivot rod 24 to unfold when the stroller frame is folded. When the stroller is unfolded, the flexible strap pulls the pivot rod 24 upwards, the torsion spring is in a deformed state, and the pivot rod 24 does not touch the ground.During the folding of the stroller, the flexible strap relaxes the rotating bar 24, the torsion spring elastically returns to its starting position and pushes the rotating bar 24 to rotate, thus unfolding it. In this state, the rotating bar 24 can rest on the ground. The support provided by the rotating bar 24 and the wheels 100 at the lower end of the rear support bar 2 allows the folded stroller frame to stand upright on the ground, facilitating storage.

[0024] As in the Fig. 6 to Fig. As shown in Figure 7, the latching locking element 62 further comprises a sliding block 623 which is connected to the sliding seat 621. The sliding block 623 extends partially outside the connecting seat 21, the first release section 63 is arranged on the sliding block 623, and the sliding block 623 is further provided with a second release section 65 which projects from the connecting seat 21 and can be actuated to release the latching locking element 62 from the latching positions 61.

[0025] After the seat assembly 4 has been detached from the connector 22, the user can pull the second release section 65 to move the sliding block 623, thereby releasing the locking pins 622 on the sliding seat 621 from the detent locking positions 61. In this state, the front support rod 1, the rear support rod 2, and the push rod assembly 3 are unlocked from each other, even without drive from the seat section 41. By rotating the push rod assembly 3, the front support rod 1 can then be moved via the connecting rod 5 to rotate and approach the rear support rod 2, thus also enabling the wagon frame to be folded separately without the seat assembly 4. Therefore, if, as in Fig. As shown in Figure 18, if a baby sleeping basket 200 is attached to the connector 22 and the stroller frame is to be folded, the baby sleeping basket 200 can first be removed. Then, the front support bar 1, the rear support bar 2, and the push bar assembly 3 can be unlocked using the second release section 65 to allow the stroller frame to be folded without the seat assembly 4, which facilitates storage and transport. Thus, the entire frame can be folded with the seat assembly 4 attached. With the baby sleeping basket 200 attached, the front support bar 1, rear support bar 2, and push bar assembly 3 can also be folded. This ensures a wide range of applications, and the unlocking and folding process is also extremely user-friendly and quick.

[0026] As in the Fig. 11, Fig. 12, Fig. 13 to Fig. As shown in Figure 14, the seating arrangement 4 comprises a mounting seat 42, which is detachably connected to the connector 22. The seat section 41 is rotatably connected to the mounting seat 42, and the seat section 41 is provided with a backrest section 43 and an armrest section 44, which are rotatable relative to it. A locking arrangement 45 is arranged between the mounting seat 42, the seat section 41, the backrest section 43, and the armrest section 44, which is capable of locking the seating arrangement 4 in the unfolded state.

[0027] As in the Fig. 11, Fig. 12, Fig. 13 to Fig. As shown in Figure 14, the seat section 41 comprises a seat plate 411 and a release section 412, which is arranged on the seat plate 411 and is capable of pressing the first release section 63 to release the detent locking element 62 from the detent locking positions 61 when the seat section 41 is rotated relative to the mounting seat 42. The release section 412 comprises a release slide 4121, which is slidably connected to the seat plate 411 and is capable of pressing the first release section 63 to move when the seat section 41 is rotated and folded relative to the mounting seat 42. A reset element 4122 is also arranged between the release slide 4121 and the seat plate 411, which is capable of pressing the release slide 4121 to reset.The release slide 4121 is provided with a first inclined surface 4123, and the first release section 63 is provided with a pressure surface 631 capable of pressing the first inclined surface 4123 to retract the release slide 4121 into the seat plate 411 when the seat assembly 4 is unfolded. When the seat assembly 4 is rotated and unfolded relative to the mounting seat 42, the release slide 4121 follows the rotational movement of the seat plate 411. The release slide 4121 gradually abuts against the first release section 63 and pushes the first release section 63 downward to disengage, thereby releasing the locking pins 622 from the detent locking positions 61. When the seat assembly 4 is to be rotated and unfolded again, the seat plate 411 unfolds in the opposite direction.In this process, the first inclined surface 4123 of the release slide 4121 gradually comes into contact with the pressure surface 631 of the first release section 63 and is pushed back into the seat plate 411 by the pressure of the pressure surface 631 to provide space for the first release section 63 and to prevent jamming between the first release section 63 and the release slide 4121.

[0028] As in the Fig. 11, Fig. 12 to Fig. As shown in Figure 13, a latching locking arrangement is arranged between the mounting seat 42 and the connector 22, capable of locking the two. The latching locking arrangement comprises a latching position 71 located on the connector 22, and a latching block 72 is arranged on the mounting seat 42, which can be laterally displaced relative to it to engage or disengage from the latching position 71. The mounting seat 42 is also connected to an actuating element 73, which can be vertically displaced relative to it to push the latching block 72 laterally.A first elastic element 74 is arranged between the locking block 72 and the mounting seat 42. This element is capable of pushing the locking block 72 back into its original position. A second elastic element 75 is arranged between the actuating part 73 and the mounting seat 42. This element is also capable of pushing the actuating part 73 back into its original position. The mounting seat 42 and the connector 22 are locked together by the locking mechanism, enabling quick assembly of the mounting seat 42 onto the connector 22. Furthermore, to remove and separate the mounting assembly 4, only the actuating part 73 needs to be pressed. The pressure exerted by the actuating part 73 displaces it vertically relative to the mounting seat 42, thereby pressing the locking block 72 and displacing it relative to the mounting seat 42.The locking block 72 gradually releases from the locking position 71, allowing the seat assembly 4 to be removed from the connector 22.

[0029] As in the Fig. 12, Fig. 13, Fig. 14, Fig. 15, Fig. 16 to Fig. As shown in Figure 17, a step adjustment mechanism is arranged between the seat section 41 and the backrest section 43, which is capable of adjusting the inclination of the backrest section 43 relative to the seat section 41. The step adjustment mechanism comprises several adjustment steps 81, which are arranged on the seat section 41. A sliding element 82 is arranged on the backrest section 43, which can be moved relative to it. The sliding element 82 is provided with a locking connection section 821, which is capable of engaging with the adjustment steps 81. A release element 83 is arranged on the backrest section 43, which is rotatable relative to it. A first pull cable 84 is arranged between the release element 83 and the sliding element 82, which is capable of connecting the two to each other.A second return spring 85 is arranged between the sliding element 82 and the backrest section 43, which is capable of pushing the sliding element 82 back into its original position. The seat section 41 is further provided with a stop section 413, which is capable of preventing the sliding element 82 from rotating forward. A double locking assembly 9 is arranged between the release element 83 and the backrest section 43. The double locking assembly 9 comprises a release button 91, which is located on the release element 83. The release button 91 is provided with a projection 92, and the backrest section 43 is provided with a recess groove 93, which is capable of accommodating the projection 92 to pull the sliding element 82 away from the stop section 413 via the first pull cable 84.An elastic element 94 is arranged between the release button 91 and the backrest section 43. This element is capable of pressing the projection 92 on the release button 91, causing it to misalign with the recess 93. To prevent adults from accidentally rotating and folding the backrest section 43 towards the seat section 41 when adjusting the inclination of the backrest section 43 relative to the seat section 41, a double locking arrangement 9 is provided to prevent incorrect operation by adults. If adults have not unlocked the double locking arrangement 9, the release element 83 can still be rotated relative to the backrest section 43 to unlock the step adjustment mechanism.At this position, however, the sliding element 82 is supported by the stop section 413, and the locking connection section 821 is pressed against the stop section 413 during rotation to prevent the backrest section 43 from rotating relative to the seat section 41 and folding forward. When the seat assembly 4 is to be folded, the release button 91 is moved horizontally so that the projection 92 on the release button 91 aligns with the recess groove 93. This gives the release element 83 sufficient rotation to pull the pull cable 84, and the locking connection section 821 on the sliding element 82 is disengaged from the stop section 413. Now the backrest section 43 can be folded toward the seat section 41. When the backrest section 43 is rotated and folded, the locking assembly 45 is also driven to unlock, and the seat section 41 can be rotated relative to the mounting seat 42.At this point, the seat section 41 presses the first release section 63 to achieve a linked release and ensure that the front support rod 1, the rear support rod 2 and the push rod assembly 3 are released, which facilitates folding.

[0030] As in the Fig. 12, Fig. 13, Fig. 14, Fig. 15 to Fig. As shown in Figure 16, the locking arrangement 45 comprises a left connecting housing 451, which is arranged on the seat section 41, and a right connecting housing 452, which is arranged on the mounting seat 42. A toothed groove 453 is arranged in both the left connecting housing 451 and the right connecting housing 452. The left connecting housing 451 and the right connecting housing 452 form a sealed space. A first toothed section 454 is arranged in the sealed space, which is laterally movable within it and can simultaneously engage with the toothed grooves 453 of the left connecting housing 451 and the right connecting housing 452. A third return spring 455 is also arranged between the toothed section 454 and the right connecting housing 452.A pressure projection 456 is arranged on the backrest section 43. This projection is capable of horizontally displacing the first toothing 454 and disengaging it from the toothed groove 453 of the left connecting housing 451 when the backrest section is rotated and folded. A recess 457 is arranged on the first toothing 454 to accommodate the pressure projection 456. The recess 457 on the first toothing 454 is also provided with a first pressure surface 458 that can be pressed by the pressure projection 456. To unlock the locking assembly 45, the double locking assembly 9 is first unlocked, followed by the step adjustment mechanism. By rotating the backrest section 43 forward, the backrest section 43 is rotated and folded towards the seat section 41.During this process, the pressure projection 456 on the backrest section 43 gradually presses the first pressure surface 458 of the toothing 444 as it rotates, causing the first toothing 454 to be displaced laterally. At this point, the first toothing 454 gradually disengages from the toothing groove 453 of the left connecting housing 451 and enters the right connecting housing 452. Now the seat section 41 can be rotated and folded relative to the mounting seat 42.

[0031] As in the Fig. 12 and Fig. As shown in Figure 13, a protruding projection 459 is also arranged on the first toothing 454, and a locking groove 450 is arranged on the armrest section 44, into which the projection 459 can engage to prevent the armrest section 44 from rotating and folding. As the first toothing 454 slides, the projection 459 on the first toothing 454 also disengages from the locking groove 450 of the armrest section 44. This allows the armrest section 44 to be rotated and folded relative to the seat section 41.

[0032] As in the Fig. 18 and Fig.As shown in Figure 19, the seat assembly 4 further comprises a leg rest 46, which is rotatably connected to the seat section 41. An adjustment assembly 47 is arranged between the leg rest 46 and the seat section 41, which is capable of adjusting the angle of the leg rest 46 relative to the seat section. The adjustment assembly 47 comprises a left rotary housing 471, which is arranged on the seat section 41, and a right rotary housing 472, which is arranged on the leg rest 46. A detent groove 473 is arranged in both the left rotary housing 471 and the right rotary housing 472. The left rotary housing 471 and the right rotary housing 472 enclose a movement space. A second toothed element 474 is arranged in the movement space, which is laterally movable within it and can simultaneously engage with the detent grooves 473 of the left rotary housing 471 and the right rotary housing 472.An elastic component 475 is also arranged between the second toothed section 474 and the left rotary housing 471. A rotary element 476 is arranged between the second toothed section 474 and the right rotary housing 472, and is rotatable relative to both. The right rotary housing 472 is provided with a pressure projection 4721, which is able to push the rotary element 476 laterally when the rotary element 476 is rotated, and the second toothed section 474 is able to disengage from the detent groove 473 of the right rotary housing 472 when the rotary element 476 is laterally displaced. The leg support 46 is provided with an actuating element 477, which is movable relative to it. A second pull rope 478 is arranged between the actuating element 477 and the rotary element 476, which is able to move the rotary element 476 when the actuating element 477 is actuated.An elastic return element 479 is arranged between the actuating element 477 and the leg rest 46. This return element is capable of pushing the actuating element back into its original position. When the position of the leg rest 46 needs to be adjusted relative to the seat section 41, the actuating element 477 is actuated. The actuating element 477 is moved relative to the seat section 41, thereby pulling the second pull cable 478. Pulling the second pull cable 478 rotates the rotary element 476. The rotary element 476 rotates relative to the second toothed section 474 and the right-hand rotary housing 472. During rotation, the rotary element 476 is pressed by the pressure projection 4721, causing it to be moved laterally relative to the right-hand rotary housing 472. The second toothing 474 is pressed and laterally displaced in the movement space and gradually releases itself from the detent groove 473 of the right rotary housing 472 in order to enter the left rotary housing 471.The adjustment mechanism 47 is unlocked, allowing the leg rest 46 to be rotated relative to the seat section 41 and its position adjusted. After the position adjustment is complete, the actuating element 477 is released. The elastic return element 479 pushes the second toothing 474 and the rotary element 476 back into their reset position, thereby simultaneously engaging the second toothing 474 with the detent grooves 473 of the left rotary housing 471 and the right rotary housing 472. In one embodiment, an adjustment mechanism 47 is arranged at each of the two lateral connection points between the leg rest 46 and the seat section 41. Both adjustment mechanisms 47 can be unlocked by actuating a single actuating element 477, which simplifies operation. Compared to a pressure-operated adjustment mechanism 47, the user can conveniently perform the operation with just one hand, providing added comfort. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 221188720U

[0003]

Claims

[1] Stroller frame, characterized bythat it comprises a pushrod assembly (3) as well as a front support rod (1) and a rear support rod (2), each connected to wheels (100), wherein a connecting seat (21) is fixedly arranged at the upper end of the rear support rod (2), a first connecting section (11) is fixedly arranged at the upper end of the front support rod (1), a second connecting section (32) is fixedly arranged at the lower end of the pushrod assembly (3), a connector (22) is arranged on the inside of the connecting seat (21) which is detachably connected to a seat assembly (4), wherein the first connecting section (11) is pivotably connected to the connecting seat (21) about a first axis (A), the second connecting section (32) is pivotably connected to the connecting seat (21) about a second axis (B), and a connecting rod (5) is arranged between the first connecting section (11) and the second connecting section (32),which is pivotably connected to the two and is able to move the front support rod (1) to rotate and fold it towards the rear support rod (2) when the pushrod assembly (3) is rotated and folded relative to the rear support rod (2), wherein the connecting rod (5) is rotatably connected at one end about a third axis (C) to the first connecting section (11) and the connecting rod (5) is rotatably connected at the other end about a fourth axis (D) to the second connecting section (32), the first connecting section (11) and the second connecting section (32) each being provided with a detent locking position (61) and the connecting seat (21) further being provided with a detent locking element (62) which can be displaced relative thereto to simultaneously engage or disengage from the individual detent locking positions (61),wherein the detent locking element (62) is provided with a first release section (63) which projects from the connecting seat (21) and can be pressed through a seat section (41) of the seat assembly (4) to release the detent locking element (62) from the detent locking positions (61) when the seat assembly (4) is rotated and folded towards the front support rod (1), and wherein a first return spring (64) is arranged between the detent locking element (62) and the connecting seat (21) which is able to push the detent locking element (62) back into position. [2] Stroller frame according to claim 1, characterized by, that the latching locking element (62) comprises a sliding seat (621) which is slidably connected to the connecting seat (21), wherein the sliding seat (621) is provided with locking pins (622) which can be engaged in the latching locking positions (61), and the connecting seat (21) is provided with a sliding groove (211) which is able to guide the displacement of the locking pins (622). [3] Stroller frame according to claim 1, characterized by, that a front crossbar (12) is arranged at the lower end of the front support bar (1) and a rear crossbar (23) is arranged at the lower end of the rear support bar (2), the front crossbar (23) being provided with a swivel bar (24) which is rotatable relative to it, a flexible strap being arranged between the swivel bar (24) and the rear crossbar (23) which is able to pull the swivel bar (24) upwards when the stroller frame is in an unfolded state, and a torsion spring also being arranged between the swivel bar (24) and the front crossbar (12) which is able to push the swivel bar (24) to unfold when the stroller frame is folded. [4] Stroller frame according to claim 2, characterized by, that the latching locking element (62) further comprises a sliding block (623) which is connected to the sliding seat (621), wherein the sliding block (623) extends partially outside the connecting seat (21), the first release section (63) is arranged on the sliding block (623) and the sliding block (623) is further provided with a second release section (65) which projects out of the connecting seat (21) and can be actuated to release the latching locking element (62) from the latching locking positions (61). [5] Stroller frame according to any one of claims 1 to 4, characterized by, that the seating arrangement (4) comprises an assembly seat (42) which is detachably connected to the connector (22), wherein the seat section (41) is rotatably connected to the assembly seat (42), the seat section (41) is provided with a backrest section (43) and an armrest section (44) which are rotatable relative thereto, wherein a locking arrangement (45) is arranged between the assembly seat (42), the seat section (41), the backrest section (43) and the armrest section (44), which is able to lock the seating arrangement (4) in the unfolded state. [6] Stroller frame according to claim 5, characterized bythat the seat section (41) comprises a seat plate (411) and a release section (412) which is arranged on the seat plate (411) and is able to push the first release section (63) to release the detent locking element (62) from the detent locking positions (61) when the seat section (41) is rotated relative to the mounting seat (42), wherein the release section (412) comprises a release slide (4121) which is slidably connected to the seat plate (411) and is able to push the first release section (63) to displace it when the seat section (41) is rotated and folded relative to the mounting seat (42), wherein a return element (4122) is also arranged between the release slide (4121) and the seat plate (411), which is able to return the release slide Press (4121) to resetthe release slide (4121) is provided with a first inclined surface (4123) and the first release section (63) is provided with a pressure surface (631) which is able to press the first inclined surface (4123) to retract the release slide (4121) into the seat plate (411) when the seat assembly (4) is unfolded. [7] Stroller frame according to claim 5, characterized by, that a latching locking arrangement is arranged between the mounting seat (42) and the connector (22), which is capable of locking the two, wherein the latching locking arrangement comprises a latching position (71) located on the connector (22), and a latching block (72) is arranged on the mounting seat (42), which can be laterally displaced relative thereto to engage in or disengage from the latching position (71), the mounting seat (42) is also connected to an actuating element (73) which can be vertically displaced relative thereto to push the latching block (72) for lateral displacement, a first elastic element (74) is arranged between the latching block (72) and the mounting seat (42), which is capable of pushing the latching block (72) back into position, and a second elastic element (75) is arranged between the actuating element (73) and the mounting seat (42), which is capable ofPress the actuating part (73) to reset. [8] Stroller frame according to claim 5, characterized bythat a step adjustment mechanism is arranged between the seat section (41) and the backrest section (43), which is capable of adjusting the inclination of the backrest section (43) relative to the seat section (41), wherein the step adjustment mechanism comprises several adjustment steps (81) arranged on the seat section (41), a sliding element (82) is arranged on the backrest section (43) which can be displaced relative thereto, wherein the sliding element (82) is provided with a detent connection section (821) which is capable of engaging in the adjustment steps (81), a release element (83) is arranged on the backrest section (43) which is rotatable relative thereto, wherein a first pull cable (84) is arranged between the release element (83) and the sliding element (82) which is capable of connecting the two to each other, and a second return spring (85) is arranged between the sliding element (82) and the backrest section (43). is,which is able to push the sliding element (82) to reset. [9] Stroller frame according to claim 8, characterized bythat the seat section (41) is further provided with a stop section (413) capable of preventing the sliding element (82) from rotating forward, a double locking arrangement (9) is arranged between the release element (83) and the backrest section (43), the double locking arrangement (9) comprising a release button (91) arranged on the release element (83), the release button (91) being provided with a projection (92), and the backrest section (43) being provided with a recess groove (93) capable of providing space for the projection (92) to pull the sliding element (82) away from the stop section (413) via the first pull cable (84), and an elastic element (94) being arranged between the release button (91) and the backrest section (43) capable of holding the projection (92) in place. Press the release button (91),to cause its misalignment with the recess groove (93). [10] Stroller according to claim 5, characterized bythat the seat arrangement (4) further comprises a leg rest (46) rotatably connected to the seat section (41), wherein an adjustment arrangement (47) is arranged between the leg rest (46) and the seat section (41), the adjustment arrangement being able to adjust the angle of the leg rest (46) relative to the seat section, the adjustment arrangement (47) comprising a left rotary housing (471) arranged on the seat section (41) and a right rotary housing (472) arranged on the leg rest (46), wherein a detent groove (473) is arranged in both the left rotary housing (471) and the right rotary housing (472), the left rotary housing (471) and the right rotary housing (472) enclosing a movement space, wherein a second toothing (474) is arranged in the movement space, which is laterally movable therein and simultaneously engages with the detent grooves (473) of the left rotary housing (471). and the right rotating housing (472) can be engaged,wherein an elastic component (475) is also arranged between the second toothing (474) and the left rotary housing (471), wherein a rotary element (476) is arranged between the second toothing (474) and the right rotary housing (472) which is rotatable relative to the two, the right rotary housing (472) is provided with a pressure projection (4721) which is able to push the rotary element (476) to laterally displace it when the rotary element (476) is rotated, and the second toothing (474) is able to disengage from the detent groove (473) of the right rotary housing (472) when the rotary element (476) is laterally displaced, the leg support (46) is provided with an actuating element (477) which is displaceable relative to it, wherein a second pull cable (478) is arranged between the actuating element (477) and the rotary element (476), which is in the The position is to move the rotary element (476) when the actuating element (477) is actuated,and an elastic return element (479) is arranged between the actuating element (477) and the leg support (46), which is able to push the actuating part back into position.

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