Stroller framework

Abstract

The framework comprises a first supporting rod and a second supporting rod which are both connected with wheels, the first supporting rod is provided with a sliding piece capable of sliding relative to the first supporting rod, the sliding piece is rotatably connected with an upper supporting rod around a first axis A, and the upper end of the upper supporting rod is connected with a hand pushing rod; the position, close to the lower end of the hand-push rod, of the hand-push rod is rotatably connected with the upper supporting rod around a second axis B. A linkage piece hinged to the hand-push rod and the first supporting rod is arranged between the lower end of the hand-push rod and the upper end of the first supporting rod, and the second supporting rod is rotatably connected to the sliding piece or the upper supporting rod around a third axis C. A transmission part rotatably connected with the second supporting rod and the first supporting rod is further arranged between the second supporting rod and the first supporting rod, a seat supporting part is arranged between the upper supporting rod and the first supporting rod, the front end of the seat supporting part is rotatably connected to the upper supporting rod around an eleventh axis J, and the rear end of the seat supporting part is rotatably connected to the first supporting rod around a twelfth axis K. The folding chair is simple in structure, flexible to fold and small in size after being folded.

Description

Technical field

[0001] The invention relates to a child stroller frame. [Background Technology]

[0002] Strollers are a common accessory for infants and young children as they grow. Current stroller frames are generally foldable for easy carrying or storage. Furthermore, the commercially available stroller frames vary widely in structure, folding motion, and folding principles. Many existing stroller frames suffer from complex structures, making them inconvenient to fold and resulting in a large volume when folded.

[0003] Therefore, the present invention is just produced based on above-mentioned deficiency. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a child stroller frame which has a simple structure, is flexible to fold, and has a small volume when folded.

[0005] The present invention is achieved through the following technical solutions:

[0006] The folding member 12 is connected to the upper support rod 3 and the lower support rod 3 is connected to the upper support rod 3 so that the folding member 12 can move from the unfolded position to the folded position after the locking device is unlocked. The folding member 12 includes a first support rod 11 and a second support rod 12, both of which are connected to the wheels 13. The first support rod 11 is provided with a sliding member 2 that can slide relative to the first support rod 11. The sliding member 2 is rotatably connected to the upper support rod 3 around the first axis A. The upper end of the upper support rod 3 is connected to the hand push rod 4. The hand push rod 4 is rotatably connected to the upper support rod 3 around the second axis B near its lower end. A linkage member 5 is provided between the lower end of the hand push rod 4 and the upper end of the first support rod 11, which is hinged to the two. The second support rod 12 is rotatably connected to the sliding member 2 or the upper support rod 3 around a third axis C. A transmission member 6 is also provided between the second support rod 12 and the first support rod 11, which is rotatably connected to the two. A seat support member 9 is provided between the upper support rod 3 and the first support rod 11. The front end of the seat support member 9 is rotatably connected to the upper support rod 3 around the eleventh axis J, and the rear end is rotatably connected to the first support rod 11 around the twelfth axis K.

[0007] The upper support rod 3 is provided with a connecting seat 33, and the seat support member 9 includes a seat rod 91 rotatably connected to the connecting seat 33 around the eleventh axis J, and the rear end of the seat rod 91 is rotatably connected to the first support rod 11 around the twelfth axis K.

[0008] The transmission member 6 includes a transmission rod, one end of which is hinged to the first support rod 11 around the fourth axis D, and the other end of which is hinged to the second support rod 12 around the fifth axis E.

[0009] The linkage member 5 includes a linkage rod, one end of which is hinged to the lower end of the push rod 4 around the sixth axis F, and the other end of which is hinged to the upper end of the first support rod 11 around the seventh axis G.

[0010] When the stroller frame is in the unfolded state, the upper support rod 3 and the push rod 4 form a straight line structure.

[0011] When the stroller frame is in the unfolded state, the upper support rod 3, the push rod 4 and the second support rod 12 are connected to form an L shape.

[0012] The first support rod 11 includes a straight section 111 and a bent section 112 bent relative to the straight section 111. The sliding member 2 is arranged on the straight section 111, and the linkage member 5 is arranged between the upper end of the bent section 112 and the lower end of the push rod 4. When the stroller frame is in the unfolded state, the upper support rod 3 is located in front of the bent section 112.

[0013] The child stroller frame also includes an armrest assembly 8, which includes a linkage piece 81 whose lower end is hinged to the upper support rod 3 around the eighth axis N, and an armrest rod 82 is hinged to the upper end of the linkage piece 81 around the ninth axis H. The rear end of the armrest rod 82 is hinged to the linkage member 5 around the tenth axis I, and the front end of the armrest rod 82 is connected to a handle 83 for the child to grasp.

[0014] The child stroller frame also includes a backrest assembly 7, a first support seat 113 is provided at the upper end of the first support rod 11, the backrest assembly 7 includes a backrest seat 71 connected to the first support seat 113 and rotatable relative to the first support seat 113, a backrest 72 is provided on the backrest seat 71, a fixed seat 92 is provided on the seat rod 91, a sliding block 93 that can slide along the seat rod 91 is provided on the seat rod 91 and located on the inner side of the fixed seat 92, the backrest seat 71 is provided with a limiting groove 73 that can engage with the sliding block 93 when the child stroller frame is in the unfolded state and the backrest 72 and the seat rod 91 are at the minimum angle gear, and can be disengaged from the sliding block 93 when the child stroller frame is in the folding process, and a first return spring 94 that can push the sliding block 93 to return to its original position is also provided between the fixed seat 92 and the sliding block 93.

[0015] The upper support rod 3, the second support rod 12 and the sliding member 2 are coaxially connected.

[0016] The locking device includes a first locking component arranged between the hand push rod 4 and the upper end of the upper support rod 3 and a second locking component arranged between the lower end of the upper support rod 3 and the second support rod 12. The upper support rod 3 is also provided with a linkage component that can pull the second locking component to unlock when the first locking component is unlocked and the hand push rod 4 rotates relative to the upper support rod 3. The linkage component includes a rotating seat 10e rotatably connected to the upper support rod 3. A second pull rope 10f is provided between the rotating seat 10e and the second locking component, which can pull the second locking component to unlock when the rotating seat 10e rotates. A pushing portion 10g is provided on the hand push rod 4. A matching portion 10h is provided on the rotating seat 10e, which can abut against the pushing portion 10g when the first hand push rod 4 rotates relative to the upper support rod 3 to rotate the rotating seat 10e. A reset torsion spring 10i is also provided between the rotating seat 10e and the upper support rod 3, which can drive the rotating seat 10e to rotate and reset.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. When folding the stroller frame of the present invention, the push rod is rotated forward, causing it to rotate relative to the upper support rod and move closer to the upper support rod. The lower end of the push rod then pushes the linkage member backward. During this process, the linkage member rotates relative to the first support rod, and the seat support member rotates relative to the upper support rod and the first support rod. This causes the upper support rod to rotate relative to the sliding member and push the sliding member to slide along the first support rod. During the sliding process, the sliding member drives the second support rod to rotate relative to the sliding member via the transmission member and move closer to the first support rod, ultimately bringing the push rod, upper support rod, first support rod, second support rod, and seat support member together. As a result, the entire stroller frame has a simple structure, is flexible to fold, and has a small size when folded.

[0019] 2. The upper support rod of the present invention is rotatably connected to a linkage piece, the upper end of which is hingedly connected to a handrail. The rear end of the handrail is hingedly connected to a linkage member, and the front end of the handrail is connected to a handle for the child to grasp. Therefore, when the stroller frame is folded, the handrail rotates relative to the linkage piece and the linkage member, and the linkage piece rotates relative to the upper support rod, thereby rotating the handrail rod toward the upper support rod and folding it. The folding operation of the handrail assembly is simple and quick.

Brief Description of the Drawings

[0020] Figure 1 is a perspective view of embodiment 1 of the present invention;

[0021] Figure 2 This is a side view of the expanded state of embodiment 1 of the present invention;

[0022] Figure 3 is a side view of Example 1 of the present invention during the folding process;

[0023] Figure 4 is a perspective view of embodiment 2 of the present invention;

[0024] Figure 5 This is a side view of the expanded state of embodiment 2 of the present invention;

[0025] Figure 6 is a side view of Example 2 of the present invention during the folding process;

[0026] Figure 7 is a cross-sectional view of a component of Example 2 of the present invention;

[0027] Figure 8 yes Figure 7 Magnified view at the center X;

[0028] Figure 9 yes Figure 7 Enlarged view at Y in the middle;

[0029] Figure 10 is a three-dimensional diagram of the folding process of Example 2 of the present invention;

[0030] Figure 11 yes Figure 4 Magnified view at M in the middle;

[0031] Figure 12 yes Figure 10 Magnified view at middle Z;

[0032] Figure 13 This is a side view of embodiment 2 of the present invention in a folded state;

[0033] Figure 14 is a perspective view of components of Example 2 of the present invention;

[0034] Figure 15 is an exploded view of embodiment 2 of the present invention;

[0035] Figure 16 yes Figure 15 Enlarged view at center W;

[0036] Figure 17 yes Figure 15 Magnified view of the V in the middle. [Specific implementation method]

[0037] The present invention will be further described below in conjunction with the accompanying drawings:

[0038] Example 1:

[0039] like Figures 1 to 3As shown, a child stroller frame can be moved from an unfolded position to a folded position after a locking device is unlocked, comprising a first support rod 11 and a second support rod 12, both of which are connected to wheels 13. The first support rod 11 is provided with a sliding member 2 that can slide relative to it, and the sliding member 2 is a sliding sleeve sleeved on the first support rod 11. The sliding member 2 is rotatably connected to an upper support rod 3 around a first axis A, and the upper end of the upper support rod 3 is connected to a hand push rod 4. The hand push rod 4 is rotatably connected to the upper support rod 3 around a second axis B near its lower end. A linkage member 5 is hingedly connected between the lower end of the push rod 4 and the upper end of the first support rod 11. The second support rod 12 is rotatably connected to the slider 2 or the upper support rod 3 about a third axis C. A transmission member 6 is also rotatably connected between the second support rod 12 and the first support rod 11. A seat support member 9 is provided between the upper support rod 3 and the first support rod 11. The front end of the seat support member 9 is rotatably connected to the upper support rod 3 about an eleventh axis J and the rear end is rotatably connected to the first support rod 11 about a twelfth axis K. In this embodiment, the upper support rod 3, the second support rod 12, and the slider 2 are coaxially connected, that is, the first axis A and the third axis C are collinear. Furthermore, the second support rod 12 can be disposed between the slider 2 and the upper support rod 3, in which case the upper support rod 3 is indirectly and rotatably connected to the slider 2. Alternatively, the upper support rod 3 can be disposed between the slider 2 and the second support rod 12, in which case the upper support rod 3 is directly and rotatably connected to the slider 2. When the stroller frame is folded, the push rod 4 is rotated forward, causing it to rotate relative to the upper support rod 3 and move closer to the upper support rod 3. The lower end of the push rod 4 then pushes the linkage member 5 backward. During this process, the linkage member 5 rotates relative to the first support rod 11, and the seat support member 9 rotates relative to the upper support rod 3 and the first support rod 11. This causes the upper support rod 3 to rotate relative to the slider 2 and push the slider 2 to slide along the first support rod 11. During the sliding process, the slider 2 drives the second support rod 12 relative to the slider 2 via the transmission member 6, moving it closer to the first support rod 11, ultimately bringing the push rod 4, the upper support rod 3, the first support rod 11, the second support rod 12, and the seat support member 9 together. Therefore, the entire stroller frame has a simple structure, is flexible to fold, and has a small size when folded. In this embodiment, the locking device can adopt a conventional latch-type or gear-type locking mechanism, which will not be described in detail here.

[0040] like Figures 1 to 3As shown, the upper support rod 3 is provided with a connecting seat 33, and the seat support member 9 includes a seat rod 91 rotatably connected to the connecting seat 33 about an eleventh axis J. The rear end of the seat rod 91 is rotatably connected to the first support rod 11 about a twelfth axis K. Therefore, when the child stroller frame is folded, the seat rod 91 rotates relative to the upper support rod 3 and the first support rod 11, allowing the upper support rod 3 to smoothly push the sliding member 2 to slide along the first support rod 11, allowing the child stroller frame to be folded flexibly.

[0041] like Figures 1 to 3 As shown, the transmission member 6 includes a transmission rod, one end of which is hinged to the first support rod 11 around a fourth axis D, and the other end of which is hinged to the second support rod 12 around a fifth axis E. Therefore, the second support rod 12 can move smoothly during the unfolding or folding process of the stroller frame, and the stroller frame is stable and reliable in the unfolded state.

[0042] like Figures 1 to 3 As shown, the linkage member 5 includes a linkage rod, one end of which is hinged to the lower end of the push rod 4 around the sixth axis F, and the other end of which is hinged to the upper end of the first support rod 11 around the seventh axis G.

[0043] like Figures 1 to 3 As shown, when the stroller frame is in the unfolded state, the upper support rod 3 and the push rod 4 form a straight line structure, and the upper support rod 3, the push rod 4 and the second support rod 12 are connected in an L shape. Therefore, the stroller frame structure is simple and compact, and can be folded and folded flexibly.

[0044] like Figures 1 to 3 As shown, the first support rod 11 includes a straight section 111 and a bent section 112 bent relative to the straight section 111. The sliding member 2 is disposed on the straight section 111, and the linkage member 5 is disposed between the upper end of the bent section 112 and the lower end of the push rod 4. When the stroller frame is in the unfolded state, the upper support rod 3 is located in front of the bent section 112. Therefore, the stroller frame has a simple and compact structure and good stability in the unfolded state, and can be flexibly folded when folded, resulting in a small volume and a small space occupation.

[0045] Example 2:

[0046] like Figures 4 to 13 As shown, the difference between Example 2 and Example 1 is:

[0047] The stroller frame also includes a backrest assembly 7. A first support seat 113 is provided at the upper end of the first support rod 11. The backrest assembly 7 includes a backrest seat 71 connected to the first support seat 113 and rotatable relative to the first support seat 113. A backrest 72 is provided on the backrest seat 71. A fixed seat 92 is provided on the seat rod 91. A sliding block 93 is provided on the seat rod 91 and located inside the fixed seat 92, capable of sliding along the seat rod 91. The backrest seat 71 includes a retaining groove 73 that engages with the sliding block 93 when the stroller frame is unfolded and the backrest 72 and the seat rod 91 are at their minimum angle, and disengages from the sliding block 93 when the stroller frame is folded. A first return spring 94 is provided between the fixed seat 92 and the sliding block 93 to push the sliding block 93 back into its original position. The backrest assembly 7 provides a comfortable support for a child's back when riding. When the child stroller frame is in the unfolded state and the backrest 72 and the seat rod 91 are in the minimum angle gear, the sliding block 93 on the seat rod 91 engages with the limiting groove 73 on the backrest seat 71, thereby limiting the backrest 72 so that the angle between the backrest 72 and the seat support 9 cannot be further reduced, so that the child can sit comfortably. When the child stroller frame is folded, the sliding block 93 disengages from the limiting groove 73, and the backrest 72 can be rotated forward to reduce the angle between the backrest 72 and the seat rod 91, thereby folding the backrest 72. In addition, during the rotation and folding process of the backrest 72, the outer peripheral surface of the backrest seat 71 pushes the sliding block 93 and compresses the first return spring 94, so that the sliding block 93 can be returned to its original position during the unfolding process of the child stroller frame.

[0048] like Figure 15 and Figure 16As shown, the first support seat 113 and the backrest seat 71 are both provided with a plurality of ratchet grooves 74 along the circumferential direction, and the first support seat 113 and the backrest seat 71 are provided with an engaging gear 75 that can engage with the ratchet grooves 74 on both at the same time, and a fifth return spring 76 that can push the engaging gear 75 to slide and return is provided between the backrest seat 71 and the engaging gear 75, and an operating block 77 is provided on the backrest 72, and a cable (not shown in the figure) that can pull the engaging gear 75 to move laterally is provided between the operating block 77 and the engaging gear 75. The ratchet groove 74 allows the backrest 72 to be moved forward directly without operating the operating block 77, thereby reducing the angle between the backrest 72 and the seat rod 91 and allowing them to remain at a suitable angle. When the angle between the backrest 72 and the seat rod 91 needs to be increased, the operating block 77 is operated, and the engaging gear 75 is pulled by the cable, disengaging the engaging gear 75 from the ratchet groove on the first support seat 113. At this time, the backrest 72 can be rotated backward to adjust the angle. When the stroller frame is folded, the seat rod 91 rotates relative to the upper support rod 3 and the first support rod 11. After rotating to a certain angle, the sliding block 93 disengages from the limiting groove 73. Without the abutment of the sliding block 93, the backrest 72 can be directly moved forward and folded close to the seat support 9.

[0049] like Figures 4 to 13 As shown, the stroller frame of this embodiment also includes an armrest assembly 8. The armrest assembly 8 includes a linkage piece 81 whose lower end is hinged to the upper support rod 3 about an eighth axis N. A handrail rod 82 is hinged to the upper end of the linkage piece 81 about a ninth axis H. The rear end of the handrail rod 82 is hinged to the linkage member 5 about a tenth axis I. The front end of the handrail rod 82 is connected to a grip 83 for the child to grasp. When the stroller frame is folded, the handrail rod 82 rotates relative to the linkage piece 81 and the linkage member 5, which in turn rotates relative to the upper support rod 3. This allows the handrail rod 82 to rotate toward the upper support rod 3 and fold, making the folding operation of the armrest assembly 8 simple and quick.

[0050] like Figures 15 to 17As shown, the locking device includes a first locking component arranged between the hand push rod 4 and the upper end of the upper support rod 3 and a second locking component arranged between the lower end of the upper support rod 3 and the second support rod 12. The upper support rod 3 is also provided with a linkage component that can pull the second locking component to unlock when the first locking component is unlocked and the hand push rod 4 rotates relative to the upper support rod 3. The linkage component includes a rotating seat 10e rotatably connected to the upper support rod 3, and a second pull rope 10f is provided between the rotating seat 10e and the second locking component, which can pull the second locking component to unlock when the rotating seat 10e rotates. The hand push rod 4 is provided with a pushing portion 10g, and the rotating seat 10e is provided with a matching portion 10h that can abut against the pushing portion 10g when the first hand push rod 4 rotates relative to the upper support rod 3 to rotate the rotating seat 10e. A reset torsion spring 10i that can drive the rotating seat 10e to rotate and reset is also provided between the rotating seat 10e and the upper support rod 3. A first locking member is provided between the push rod 4 and the upper end of the upper support rod 3, and a second locking member is provided between the lower end of the upper support rod 3 and the second support rod 12. This ensures that the stroller frame is securely locked and stable in the unfolded state. To fold the stroller, simply unlock the first locking member and rotate the push rod 4 to unlock the second locking member via a linkage assembly. This makes unlocking the entire stroller frame easy and quick, allowing for quick and simple folding.

[0051] The upper support rod 3 includes a first connecting shell 31, the hand push rod 4 includes a second connecting shell 41, the pushing portion 10g is provided on the second connecting shell 41, and the first locking component includes a plurality of first locking grooves 101 provided on the first connecting shell 31 and the second connecting shell 41 along the circumferential direction. The first connecting shell 31 and the second connecting shell 41 are provided with a locking spline 102 that can be simultaneously engaged with the first locking grooves 101 on the first and second connecting shells. A first rotating block 103 that can rotate is provided between the locking spline 102 and the second connecting shell 41. The second connecting shell 41 is provided with a plurality of first rotating blocks 103 that rotate along the circumferential direction. When the first rotating block 103 is pushed, the first inclined protrusion 104 can be pushed to move laterally to disengage the locking spline 102 from the first locking groove 101 on the second connecting shell 41. A second return spring 105 is provided between the first connecting shell 31 and the locking spline 102 to push the locking spline 102 to slide and return to its original position. The hand push rod 4 is provided with an operating switch 106. A first pull rope 107 is provided between the operating switch 106 and the first rotating block 103 to pull the first rotating block 103 to rotate. The locking spline 102 includes a front half spline 1021 and a rear half spline 1022. When the stroller frame is in the unfolded state, the front half spline 1021 is in the unfolded state. The spline 1021 and the rear half spline 1022 are both engaged with the first locking groove 101 on the first connecting shell 31 and the second connecting shell 41. When the stroller frame is in the folded state, the front half spline 1021 is engaged with the first locking groove 101 on the first connecting shell 31 and the second connecting shell 41, and the rear half spline 1022 is disengaged from the first locking groove 101 on the second connecting shell 41; the second support rod 12 includes a third connecting shell 121, and the upper support rod 3 also includes a fourth connecting shell 32. The second locking component also includes a plurality of second locking grooves 10a provided on the third connecting shell 121 and the fourth connecting shell 32 along the circumferential direction. The third connecting shell 121 and the fourth connecting shell 32 are provided with a locking gear 10b that can simultaneously engage with the second locking grooves 10a on the two, and a second rotating block 10c that can rotate is provided between the locking gear 10b and the fourth connecting shell 32. The fourth connecting shell 32 is provided with a plurality of second oblique protrusions along the circumferential direction that can push the second rotating block 10c to move laterally when the second rotating block 10c rotates, so that the locking gear 10b is disengaged from the second locking groove 10a on the fourth connecting shell 32, and a third return spring 10d that can push the locking gear 10b to slide and return to its original position is provided between the third connecting shell 121 and the locking gear 10b. When unlocking the locking device, the seat switch 106 pulls the first rotating block 103 to rotate through the first pull rope 107. When the first rotating block 103 rotates, it is pushed by the first inclined protrusion 104 on the second connecting shell 41 and moves laterally. The first rotating block 103 pushes the locking spline 102 laterally to disengage from the first locking groove 101 on the second connecting shell 41. At this time, the hand push rod 4 can be rotated relative to the upper support rod 3.During the rotation of the push rod 4, the pushing portion 10g on the second connecting shell 41 pushes the mating portion 10h on the rotating seat 10e, causing the rotating seat 10e to rotate relative to the upper support rod 3. During the rotation of the rotating seat 10e, the second pull rope 10f pulls the second rotating block 10c to rotate. During the rotation of the second rotating block 10c, it is pushed by the second inclined protrusion (not shown) on the fourth connecting shell 32, causing it to move laterally. The second rotating block 10c pushes the locking gear 10b to move laterally and disengage from the second locking groove 10a on the fourth connecting shell 32. At this time, the upper support rod 3 and the second support rod 12 are also unlocked. At this time, the sliding member 2 can drive the second support rod 12 to rotate toward the first support rod 11 through the transmission member 6 during sliding. The upper support rod 3 and the push rod 4 also rotate toward the first support rod 11, and the entire child stroller frame is folded. During the folding operation, multiple unlocking locations can be achieved by simply operating the operating switch 106, making the folding operation of the child stroller frame simple and quick. Furthermore, when the stroller is in the folded state, the front half spline 1021 is engaged with the first locking groove 101 on the first connecting shell 31 and the second connecting shell 41, so that the stroller is locked in the folded state and will not be accidentally unfolded. When the stroller frame needs to be unfolded, it is only necessary to operate the operating switch 106 and pull the first rotating block 103 to rotate through the first pull rope 107, thereby pushing the front half spline 1021 to disengage from the first locking groove 101 on the second connecting shell 41 to unlock the folded state.

Claims

1. A child stroller frame capable of moving from an unfolded position to a folded position after a locking device is unlocked, characterized in that: The invention comprises a first support rod (11) and a second support rod (12), both of which are connected to a wheel (13); the first support rod (11) is provided with a sliding member (2) that can slide relative to the first support rod; the sliding member (2) is rotatably connected to an upper support rod (3) around a first axis (A); the upper end of the upper support rod (3) is connected to a hand push rod (4); the hand push rod (4) is rotatably connected to the upper support rod (3) around a second axis (B) near its lower end; a connecting member is provided between the lower end of the hand push rod (4) and the upper end of the first support rod (11) to connect the two. A movable member (5) is provided, the second support rod (12) is rotatably connected to the sliding member (2) or the upper support rod (3) around a third axis (C), a transmission member (6) rotatably connected to the second support rod (12) and the first support rod (11) is further provided between the second support rod (12) and the first support rod (11), a seat support member (9) is provided between the upper support rod (3) and the first support rod (11), the front end of the seat support member (9) is rotatably connected to the upper support rod (3) around an eleventh axis (J), and the rear end is rotatably connected to the first support rod (11) around a twelfth axis (K).

2. The stroller frame according to claim 1, characterized in that: The upper support rod (3) is provided with a connecting seat (33), and the seat support member (9) includes a seat rod (91) rotatably connected to the connecting seat (33) around an eleventh axis (J), and a rear end of the seat rod (91) is rotatably connected to the first support rod (11) around a twelfth axis (K).

3. The stroller frame according to claim 1, characterized in that: The transmission member (6) comprises a transmission rod, one end of which is hinged to the first support rod (11) around a fourth axis (D), and the other end of which is hinged to the second support rod (12) around a fifth axis (E).

4. The stroller frame according to claim 1, characterized in that: The linkage member (5) comprises a linkage rod, one end of which is hinged to the lower end of the push rod (4) around a sixth axis (F), and the other end of which is hinged to the upper end of the first support rod (11) around a seventh axis (G).

5. The stroller frame according to claim 1, characterized in that: When the child stroller frame is in an unfolded state, the upper support rod (3) and the push rod (4) form a straight line structure.

6. The stroller frame according to claim 5, characterized in that: When the stroller frame is in an unfolded state, the upper support rod (3), the push rod (4) and the second support rod (12) are connected in an L-shape.

7. The stroller frame according to claim 5, characterized in that: The first support rod (11) comprises a straight section (111) and a bent section (112) bent relative to the straight section (111); the sliding member (2) is arranged on the straight section (111); the linkage member (5) is arranged between the upper end of the bent section (112) and the lower end of the push rod (4); when the child stroller frame is in an unfolded state, the upper support rod (3) is located in front of the bent section (112).

8. The child stroller frame according to any one of claims 1 to 7, characterized in that: The invention also includes an armrest assembly (8), wherein the armrest assembly (8) includes a linkage plate (81) whose lower end is hinged to the upper support rod (3) around an eighth axis (N), an upper end of the linkage plate (81) is hinged to a handrail rod (82) around a ninth axis (H), a rear end of the handrail rod (82) is hinged to the linkage member (5) around a tenth axis (I), and a front end of the handrail rod (82) is connected to a handle (83) for children to grasp.

9. The stroller frame according to claims 1 to 7, characterized in that: The invention also includes a backrest assembly (7), wherein the upper end of the first support rod (11) is provided with a first support seat (113), the backrest assembly (7) includes a backrest seat (71) connected to the first support seat (113) and rotatable relative to the first support seat (113), the backrest seat (71) is provided with a backrest (72), the seat rod (91) is provided with a fixed seat (92), and the seat rod (91) is provided with a fixed seat (92) on the inner side thereof. (91) a sliding block (93) for sliding, the backrest seat (71) is provided with a limiting groove (73) which can be engaged with the sliding block (93) when the child stroller frame is in an unfolded state and the backrest (72) and the seat rod (91) are in a minimum angle gear, and can be disengaged from the sliding block (93) when the child stroller frame is in a folding process, and a first return spring (94) which can push the sliding block (93) to return is also provided between the fixed seat (92) and the sliding block (93).

10. The stroller frame according to claim 1, characterized in that: The upper support rod (3), the second support rod (12) and the sliding member (2) are coaxially connected.

11. The stroller frame according to claim 1, characterized in that: The locking device comprises a first locking component provided between the hand push rod (4) and the upper end of the upper support rod (3) and a second locking component provided between the lower end of the upper support rod (3) and the second support rod (12). The upper support rod (3) is also provided with a linkage component which can pull the second locking component to unlock when the first locking component is unlocked and the hand push rod (4) rotates relative to the upper support rod (3). The linkage component comprises a rotating seat (10e) rotatably connected to the upper support rod (3). The rotating seat (10e) and the second locking component are connected. A second pull rope (10f) is provided between the rotating seat (10e) and can pull the second locking component to unlock when the rotating seat (10e) rotates; a pushing portion (10g) is provided on the hand push rod (4); a matching portion (10h) is provided on the rotating seat (10e) and can abut against the pushing portion (10g) to rotate the rotating seat (10e) when the first hand push rod (4) rotates relative to the upper support rod (3); and a reset torsion spring (10i) is also provided between the rotating seat (10e) and the upper support rod (3) to drive the rotating seat (10e) to rotate and reset.

Images