Seat adjusting mechanism for stroller

Abstract

The utility model relates to a seat adjusting mechanism for a child stroller, and belongs to the technical field of child stroller production. Comprising a seat frame connecting piece connected with a seat frame assembly, a seat plug is arranged on the outer side of the seat frame connecting piece, a front wall socket is coaxially arranged between the seat frame connecting piece and a backrest adjusting seat, a rivet is inserted in a center hole of the seat plug, and the front wall socket is connected with the seat frame connecting piece. The other end of the rivet sequentially penetrates through the seat frame connecting piece and the front wall socket to be connected with the backrest adjusting seat, the seat plug, the seat frame connecting piece, the front wall socket and the backrest adjusting gear are connected together, the seat frame connecting piece and the front wall socket are both of an annular structure, and the seat frame connecting piece, the front wall socket and the backrest adjusting seat can coaxially rotate. The foldable child seat has the advantages that the seat frame connecting piece, the front wall socket and the backrest adjusting seat can coaxially rotate, the occupied space of the whole folded seat is reduced, all parts of the child seat can be independently folded or unfolded, and the practicability of the child stroller is improved.

Description

Technical Field

[0001] The utility model relates to a seat adjustment mechanism for a child stroller and belongs to the technical field of child stroller production. Background Art

[0002] When taking children out for a trip or a walk, carrying a stroller can reduce the burden of parents taking care of children to a certain extent. Strollers are currently very popular in the market.

[0003] Patent No. 201420683509.6 discloses a seat adjustment mechanism for a child stroller, which includes a first connecting member and a second connecting member, wherein the first connecting member includes a collar fixedly sleeved on the seat frame and a first sleeve portion, and the second connecting member includes a second sleeve portion hingedly connected to the first sleeve portion, wherein a movable block is arranged in the first sleeve portion, and the movable block is connected to a traction line in the seat frame through the first sleeve portion, and can move up and down under the drive of the traction line, wherein a block protruding toward the second sleeve portion is arranged on the movable block, and a plurality of spaced slots matching the slots are arranged in the second sleeve portion, and a channel connecting the plurality of slots is arranged on one side of the plurality of slots.

[0004] The common structures of existing child stroller seats all have a folding function, that is, they are unfolded when in use and folded when not in use. However, the current technical considerations are not comprehensive and have the following disadvantages: the opening and folding operation steps when unfolding and storing are relatively complicated; the folding seat basically relies on a rotating shaft or a connecting piece to make the backrest, the seat and the seat base close to each other and fold, but this folding method often causes the backrest to protrude excessively from the seat base or other rods of the stroller, thereby causing the stroller to occupy too much space when folding, and after the whole is folded, it still occupies a large space in the length direction, reducing the performance of the child stroller.

[0005] In order to solve one of the above problems, a seat adjustment mechanism for a child stroller is urgently needed. Utility Model Content

[0006] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is: how to achieve that the backrest, seat and front enclosure can be flipped forward to a folded state for convenient transportation and storage, and for this purpose, a seat adjustment mechanism for a child stroller is provided.

[0007] The seat adjustment mechanism for a child stroller described in the utility model comprises a backrest assembly and a seat frame connecting piece connected to the seat frame assembly, characterized in that: a seat plug is arranged on the outer side of the seat frame connecting piece, a front enclosure socket is arranged coaxially between the seat frame connecting piece and the backrest adjustment seat, a rivet is inserted into the center hole of the seat plug, the other end of the rivet passes through the seat frame connecting piece, the front enclosure socket and the backrest adjustment seat in sequence, and the seat plug, the seat frame connecting piece, the front enclosure socket and the backrest adjustment gear are connected together, the seat frame connecting piece and the front enclosure socket are all annular structures, the seat frame connecting piece, the front enclosure socket and the backrest adjustment seat can rotate coaxially, a first locking assembly for locking the backrest adjustment seat from rotating is arranged at an inner wall position corresponding to the seat plug on the backrest adjustment seat, and a first unlocking assembly cooperating with the first locking assembly is arranged on the backrest assembly.

[0008] The seat plug comprises a head and a plug-in portion connected to the head, and both the head and the backrest adjustment seat are cover structures. A socket portion matched with the plug-in portion of the seat plug is arranged on the frame of the child stroller.

[0009] Preferably, the first locking assembly includes a central shaft fixed on the inner wall of the backrest adjustment seat and coaxially arranged with the backrest adjustment seat, the central shaft is sleeved with a backrest adjustment gear and a backrest adjustment spring, the backrest adjustment spring provides a thrust to push the backrest adjustment gear away from the backrest adjustment seat, the outer side of the central shaft is coaxially provided with a first gear sleeve that cooperates with the backrest adjustment gear to slide, the first gear sleeve limits the movement of the backrest adjustment gear along the length direction of the first gear sleeve, and the inner wall of the head of the seat plug is provided with a second gear sleeve that cooperates with the backrest adjustment gear, and the rivet passes through the seat plug, the seat frame connecting part, the front socket, the backrest adjustment gear, the backrest adjustment spring, the central shaft, the backrest adjustment seat and the nut outside the backrest adjustment seat in sequence.

[0010] The backrest adjustment gear is embedded in the second gear sleeve and the first gear sleeve at the same time, which can limit the rotation of the backrest adjustment seat relative to the seat plug. The end of the backrest adjustment gear is disengaged from the second gear sleeve and is only connected to the first gear sleeve, which cannot limit the rotation of the backrest adjustment seat relative to the seat plug.

[0011] Preferably, the first unlocking component includes an adjusting wrench, and the adjusting wrench is installed on the backrest component. The adjusting wrench is connected to a steel wire rope that can be pulled as the adjusting wrench is pulled upward. The other end of the steel wire rope passes through the inner hole of the backrest component and is connected to the backrest adjustment gear. The steel wire rope transmits power for compressing the backrest adjustment spring.

[0012] By pulling the adjusting wrench, the end of the backrest adjusting gear can be disengaged from the second gear sleeve and only connected to the first gear sleeve, which cannot limit the rotation of the backrest adjusting seat relative to the seat plug. When the adjusting wrench is not pulled, the backrest adjusting gear is embedded in the second gear sleeve and the first gear sleeve at the same time under the action of the backrest adjusting spring, which can limit the rotation of the backrest adjusting seat relative to the seat plug.

[0013] Preferably, the adjacent surfaces of the front enclosure socket and the backrest adjustment seat are mating surfaces to each other, the front enclosure socket is provided with an arc-shaped slider, and the backrest adjustment seat is provided with an arc-shaped groove that slides in cooperation with the arc-shaped slider; the adjacent surfaces of the front enclosure socket and the seat frame connecting piece are mating surfaces to each other, the front enclosure socket is provided with a guide groove, and the seat frame connecting piece is provided with a guide slider that slides in cooperation with the guide groove, all of which are used to realize the coaxial rotation of the seat frame connecting piece, the front enclosure socket and the backrest adjustment seat.

[0014] Preferably, a second locking assembly for locking the rotation of the front enclosure socket is provided on the seat plug at a position on the outer wall corresponding to the front enclosure socket, and a second unlocking assembly cooperating with the second locking assembly is provided on the backrest assembly.

[0015] Preferably, the second locking assembly includes a vehicle collecting gear slidably arranged on the seat frame connecting member, a vehicle collecting spring driving the vehicle collecting gear to slide toward the backrest adjustment gear is arranged between the vehicle collecting gear and the seat plug, meshing teeth are arranged on the vehicle collecting gear, and the seat frame connecting member and the front enclosure socket are both provided with meshing grooves meshing with the meshing teeth, and after the meshing teeth and the meshing grooves are meshed with each other, the seat frame connecting member and the front enclosure socket are locked from relative rotation.

[0016] Preferably, the first unlocking component includes a transmission rod fixedly connected to the vehicle collecting gear, the other end of the transmission rod passes through the inner hole on the front panel socket and abuts against the driving inclined surface on the backrest adjustment seat, the transmission rod and the driving inclined surface form an inclined surface driving cooperation, the transmission rod moves forward relative to the driving inclined surface, the inclined surface driving force provided by the driving inclined surface can be converted into the elastic driving force reserved by the vehicle collecting spring, so that the meshing teeth are disengaged from the meshing groove, the front panel socket can rotate relative to the seat frame connecting piece, and the seat frame connecting piece rotates relative to the seat plug; the transmission rod moves reversely relative to the driving inclined surface, the meshing teeth engage with the two sets of meshing groove assemblies, and the front panel socket and the seat frame connecting piece are restricted from rotating relative to the seat plug.

[0017] A guide assembly for guiding the sliding movement of the vehicle retracting gear is arranged on the inner wall of the seat plug.

[0018] A child stroller includes the above two sets of seat adjustment mechanisms for child strollers, a seat frame assembly is connected between the two sets of seat frame connectors, a front enclosure is connected between the two sets of front enclosure sockets, a backrest assembly is connected between the two sets of backrest adjustment seats, an adjustment wrench is installed on the top of the backrest assembly, the adjustment wrench is an existing structure, and a socket portion that cooperates with the plug-in portion of the seat plug is provided on the frame of the child stroller. Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model discloses a seat adjustment mechanism for a child stroller in which the seat frame connector, the front wall socket and the backrest adjustment seat can rotate coaxially, so that the overall space occupied by the folded seat is reduced, and each component of the child seat can be folded or unfolded separately, thereby improving the practicality of the child stroller.

[0020] The seat adjustment mechanism for a child stroller of the utility model can release the lock of the front enclosure and the seat when the backrest is adjusted to a position smaller than the sitting angle, and the backrest, the seat and the front enclosure can be flipped forward to a folded state for easy transportation and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0022] Figure 1 It is a schematic diagram of the structure decomposition of the utility model;

[0023] Figure 2 The structure of the utility model is shown in FIG. Figure 1 (full lying);

[0024] Figure 3 The structure of the utility model is shown in FIG. Figure 2 (half lying);

[0025] Figure 4 The structure of the utility model is shown in FIG. Figure 3 (sitting position);

[0026] Figure 5 The structure of the utility model is shown in FIG. Figure 4 (Begin folding);

[0027] Figure 6 The structure of the utility model is shown in FIG. Figure 5 (Complete folding);

[0028] Figure 7 The structure of the utility model is shown in FIG. Figure 6 (lying position);

[0029] Figure 8 The structure of the utility model is shown in FIG. Figure 7 (semi-reclining position);

[0030] Fig. 9 The structure of the utility model is shown in FIG. Figure 8 (semi-reclining position);

[0031] Fig.10 The structure of the utility model is shown in FIG. Figure 9 (Begin folding);

[0032] Fig.11 The structure of the utility model is shown in FIG. Figure 10 (Complete folding);

[0033] Fig.12 A partial diagram of the utility model;

[0034] Fig.13 This is a usage diagram of the utility model.

[0035] In the figure: 1, backrest assembly 2, rivet 3, seat plug 4, retracting spring 5, retracting gear 6, seat frame connecting piece 7, front wall socket 8, backrest adjustment gear 9, backrest adjustment spring 10, front wall 11, backrest adjustment seat 12, wire rope 13, seat frame assembly 14, adjustment wrench 15, center shaft 16, first gear sleeve 17, arc-shaped slider 18, arc-shaped groove 19, meshing teeth 20, meshing groove 21, transmission rod. DETAILED DESCRIPTION

[0036] The utility model is further described below in conjunction with the accompanying drawings: The utility model is further illustrated below through specific embodiments, but is not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the invention should be included in the protection scope of the utility model.

[0037] Embodiment 1, as Figure 1 and 12As shown, a seat adjustment mechanism for a child stroller includes a backrest assembly and a seat frame connector 6 connected to a seat frame assembly 13, characterized in that: a seat plug 3 is provided on the outer side of the seat frame connector 6, a front wall socket 7 is coaxially provided between the seat frame connector 6 and the backrest adjustment seat 11, a rivet 2 is inserted into the center hole of the seat plug 3, the other end of the rivet 2 passes through the seat frame connector 6 and the front wall socket 7 in sequence and is connected to the backrest adjustment seat 11, the seat plug 3, the seat frame connector 6, the front wall socket 7 and the backrest adjustment gear 8 are connected together, the seat frame connector 6 and the front wall socket 7 are both annular structures, the seat frame connector 6, the front wall socket 7 and the backrest adjustment seat 11 can rotate coaxially, a first locking assembly for locking the rotation of the backrest adjustment seat 11 is provided at an inner wall position corresponding to the seat plug 3 on the backrest adjustment seat 11, and a first unlocking assembly cooperating with the first locking assembly is provided on the backrest assembly 1.

[0038] The seat plug 3 comprises a head and a plug-in portion connected to the head, and both the head and the backrest adjustment seat 11 are cover structures. A socket portion matched with the plug-in portion of the seat plug 3 is arranged on the frame of the child stroller.

[0039] Embodiment 2, as Figure 1 and 12 As shown, a seat adjustment mechanism for a child stroller includes a backrest assembly and a seat frame connector 6 connected to a seat frame assembly 13, characterized in that: a seat plug 3 is provided on the outer side of the seat frame connector 6, a front wall socket 7 is coaxially provided between the seat frame connector 6 and the backrest adjustment seat 11, a rivet 2 is inserted into the center hole of the seat plug 3, the other end of the rivet 2 passes through the seat frame connector 6 and the front wall socket 7 in sequence and is connected to the backrest adjustment seat 11, the seat plug 3, the seat frame connector 6, the front wall socket 7 and the backrest adjustment gear 8 are connected together, the seat frame connector 6 and the front wall socket 7 are both annular structures, the seat frame connector 6, the front wall socket 7 and the backrest adjustment seat 11 can rotate coaxially, a first locking assembly for locking the rotation of the backrest adjustment seat 11 is provided at an inner wall position corresponding to the seat plug 3 on the backrest adjustment seat 11, and a first unlocking assembly cooperating with the first locking assembly is provided on the backrest assembly 1.

[0040] Furthermore, the first locking assembly includes a central shaft 15 fixed on the inner wall of the backrest adjustment seat 11 and coaxially arranged with the backrest adjustment seat 11, the central shaft 15 is sleeved with a backrest adjustment gear 8 and a backrest adjustment spring 9, the backrest adjustment spring 9 provides a thrust to push the backrest adjustment gear 8 away from the backrest adjustment seat 11, the outer side of the central shaft 15 is coaxially provided with a first gear sleeve 16 that slides with the backrest adjustment gear 8, the first gear sleeve 16 limits the movement of the backrest adjustment gear 8 along the length direction of the first gear sleeve 16, and the inner wall of the head of the seat plug 3 is provided with a second gear sleeve that cooperates with the backrest adjustment gear 8, and the rivet 2 passes through the seat plug 3, the seat frame connecting piece 6, the front socket 7, the backrest adjustment gear 8, the backrest adjustment spring 9, the central shaft 15, the backrest adjustment seat 11 and is connected with the nut outside the backrest adjustment seat 11 in sequence.

[0041] The backrest adjustment gear 8 is embedded in the second gear sleeve and the first gear sleeve 16 at the same time, which can limit the backrest adjustment seat 11 from rotating relative to the seat plug 3. The end of the backrest adjustment gear 8 is detached from the second gear sleeve and is only connected to the first gear sleeve 16, which cannot limit the backrest adjustment seat 11 from rotating relative to the seat plug 3. Further, the first unlocking component includes an adjustment wrench 14, and the adjustment wrench 14 is installed on the backrest component 1. The adjustment wrench 14 is connected to a steel wire rope 12 that can be pulled as the adjustment wrench 14 is pulled upward. The other end of the steel wire rope 12 passes through the inner hole of the backrest component 1 and is connected to the backrest adjustment gear 8. The steel wire rope 12 transmits the power used to compress the backrest adjustment spring 9.

[0042] By pulling the adjusting wrench 14, the end of the backrest adjusting gear 8 can be disengaged from the second gear sleeve and only connected to the first gear sleeve 16, which cannot limit the rotation of the backrest adjusting seat 11 relative to the seat plug 3. When the adjusting wrench 14 is not pulled, the backrest adjusting gear 8 is embedded in the second gear sleeve and the first gear sleeve 16 at the same time under the action of the backrest adjusting spring 9, which can limit the rotation of the backrest adjusting seat 11 relative to the seat plug 3.

[0043] Furthermore, the adjacent surfaces of the front enclosure socket 7 and the backrest adjustment seat 11 are mating surfaces with each other, the front enclosure socket 7 is provided with an arc-shaped slider 17, and the backrest adjustment seat 11 is provided with an arc-shaped groove 18 that slides with the arc-shaped slider 17; the adjacent surfaces of the front enclosure socket 7 and the seat frame connecting member 6 are mating surfaces with each other, the front enclosure socket 7 is provided with a guide groove, and the seat frame connecting member 6 is provided with a guide slider that slides with the guide groove, all of which are used to realize that the seat frame connecting member 6, the front enclosure socket 7 and the backrest adjustment seat 11 can rotate coaxially.

[0044] Furthermore, a second locking assembly for locking the rotation of the front enclosure socket 7 is provided on the seat plug 3 at a position corresponding to the outer wall of the front enclosure socket 7, and a second unlocking assembly cooperating with the second locking assembly is provided on the backrest assembly 1.

[0045] Furthermore, the second locking assembly includes a vehicle collecting gear 5 slidably arranged on the seat frame connecting member 6, a vehicle collecting spring 4 is arranged between the vehicle collecting gear 5 and the seat plug 3 to drive the vehicle collecting gear 5 to slide toward the backrest adjustment gear 8, the vehicle collecting gear 5 is provided with meshing teeth 19, and the seat frame connecting member 6 and the front enclosure socket 7 are both provided with meshing grooves 20 meshing with the meshing teeth 19, and after the meshing teeth 19 and the meshing grooves 20 are meshed with each other, the seat frame connecting member 6 and the front enclosure socket 7 are locked from relative rotation.

[0046] Furthermore, the first unlocking component includes a transmission rod 21 fixedly connected to the vehicle collecting gear 5, the other end of the transmission rod 21 passes through the inner holes on the seat frame connecting member 6 and the front wall socket 7 and then abuts against the driving inclined surface on the backrest adjustment seat 11, the transmission rod 21 and the driving inclined surface form an inclined surface driving cooperation, the transmission rod 21 moves forward relative to the driving inclined surface, the inclined surface driving force provided by the driving inclined surface can be converted into the elastic driving force reserved by the vehicle collecting spring 4, so that the meshing teeth 19 are disengaged from the meshing groove 20, the front wall socket 7 can rotate relative to the seat frame connecting member 6, and the seat frame connecting member 6 rotates relative to the seat plug 3; the transmission rod 21 moves reversely relative to the driving inclined surface, and the meshing teeth 19 engage with the two sets of meshing groove 20 components, thereby limiting the rotation of the front wall socket 7 and the seat frame connecting member 6 relative to the seat plug 3.

[0047] Furthermore, a guide assembly for guiding the sliding movement of the vehicle retracting gear 5 is provided on the inner wall of the seat plug 3. Fig.13 A child stroller comprises the above-mentioned two sets of seat adjustment mechanisms for child strollers, a seat frame assembly 13 is connected between the two sets of seat frame connectors 6, a front enclosure 10 is connected between the two sets of front enclosure sockets 7, a backrest assembly 1 is connected between the two sets of backrest adjustment seats 11, an adjustment wrench 14 is installed on the top of the backrest assembly 1, and the adjustment wrench 14 is an existing structure. A socket portion that cooperates with the plug-in portion of the seat plug 3 is provided on the frame of the child stroller.

[0048] The backrest assembly 1 can be adjusted in three stages, including sitting, semi-reclining and lying positions. When the stroller is not in use, when the backrest is adjusted to an angle smaller than the sitting angle, the front enclosure 10 and the seat frame assembly 13 will be unlocked, and the backrest, seat and front enclosure can be flipped forward to a folded state for easy transportation and storage.

[0049] Backrest adjustment process:

[0050] See Figure 2-Figure 4 as well as Figure 7-Figure 9, pull the adjustment wrench 14 upwards, drive the wire rope 12 to move along the inner wall of the backrest assembly 1 tube and the groove set in the backrest adjustment seat 11, and the wire rope 12 drives the backrest adjustment gear 8 to slide into the first gear sleeve 16 along the central shaft 15, so that the backrest adjustment gear 8 is completely separated from the seat plug 3, and the backrest assembly 1 can be adjusted upward or downward; release the adjustment wrench 14, and the backrest adjustment gear 8 is driven by the restoring force of the backrest adjustment spring 9 to move into the corresponding groove of the seat plug 3 at the appropriate gear position, and the backrest assembly 1 is fixed in place. Figure 2 , Figure 3 , Figure 4 Three positions for adjustment.

[0051] Seat folding process:

[0052] See Figure 5-Figure 6 and Figure 10-11 , push the adjustment wrench 14 upward, the backrest continues to flip forward from the sitting position, the retracting gear 5 slides along the slope inside the backrest adjustment seat 11, pushing the retracting gear 5 to move into the groove along the seat plug, so that the meshing teeth 19 of the retracting gear 5 are disengaged from the seat frame connecting piece 6 and the front wall socket 7, so that the seat frame connecting piece 6 and the front wall socket 7 are flipped forward around the seat plug 3, thereby realizing the seat folding.

[0053] Seat unfolding process:

[0054] Pull the adjustment wrench 14 upward to change the backrest assembly 1 to the sitting position. The limit boss in the backrest adjustment seat 11 drives the front wall socket 7 to flip forward and upward. At the same time, the front wall socket 7 drives the seat frame connecting piece 6 to rotate. When the front wall socket 7 and the seat frame connecting piece 6 are in Figure 2 When the seat is in the closed position, the folding gear 5 is driven by the restoring force of the folding spring 4, and the boss enters the corresponding slots of the front wall socket 7 and the seat frame connection 6, thereby realizing the unfolding of the seat.

[0055] The utility model discloses a seat adjustment mechanism for a child stroller in which the seat frame connector, the front wall socket and the backrest adjustment seat can rotate coaxially, so that the overall space occupied by the folded seat is reduced, and each component of the child seat can be folded or unfolded separately, thereby improving the practicality of the child stroller.

[0056] The seat adjustment mechanism for a child stroller of the utility model can release the lock of the front enclosure and the seat when the backrest is adjusted to a position smaller than the sitting angle, and the backrest, the seat and the front enclosure can be flipped forward to a folded state for easy transportation and storage.

[0057] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the present utility model is defined by the attached claims and their equivalents.

[0058] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A seat adjustment mechanism for a child stroller, comprising a backrest assembly (1) and a seat frame connector (6) connected to a seat frame assembly (13), characterized in that: A seat plug (3) is arranged on the outer side of the seat frame connecting member (6), a front wall socket (7) is coaxially arranged between the seat frame connecting member (6) and the backrest adjustment seat (11), a rivet (2) is inserted into the central hole of the seat plug (3), the other end of the rivet (2) passes through the seat frame connecting member (6), the front wall socket (7) and the backrest adjustment seat (11) in sequence, and connects the seat plug (3), the seat frame connecting member (6), the front wall socket (7) and the backrest adjustment gear (8) together, the seat frame connecting member (6) and the front wall socket (7) are both annular structures, the seat frame connecting member (6), the front wall socket (7) and the backrest adjustment seat (11) can rotate coaxially, a first locking component for locking the rotation of the backrest adjustment seat (11) is provided at an inner wall position corresponding to the seat plug (3) on the backrest adjustment seat (11), and a first unlocking component cooperating with the first locking component is provided on the backrest component (1).

2. The seat adjustment mechanism for a child stroller according to claim 1, characterized in that: The first locking assembly comprises a central rotating shaft (15) fixed on the inner wall of the backrest adjustment seat (11) and coaxially arranged with the backrest adjustment seat (11); a backrest adjustment gear (8) and a backrest adjustment spring (9) are sleeved on the central rotating shaft (15); the backrest adjustment spring (9) provides a thrust for pushing the backrest adjustment gear (8) away from the backrest adjustment seat (11); a first gear sleeve (16) coaxially arranged on the outer side of the central rotating shaft (15) and slidingly cooperating with the backrest adjustment gear (8); The first gear sleeve (16) limits the backrest adjustment gear (8) from moving along the length direction of the first gear sleeve (16); a second gear sleeve that cooperates with the backrest adjustment gear (8) is provided on the inner wall of the head of the seat plug (3); the rivet (2) sequentially penetrates the seat plug (3), the seat frame connecting piece (6), the front wall socket (7), the backrest adjustment gear (8), the backrest adjustment spring (9), the central rotating shaft (15), the backrest adjustment seat (11), and is connected to a nut outside the backrest adjustment seat (11).

3. The seat adjustment mechanism for a child stroller according to claim 2, characterized in that: The first unlocking component comprises an adjusting wrench (14), the adjusting wrench (14) being mounted on the backrest component (1), the adjusting wrench (14) being connected to a steel wire rope (12) which can be pulled as the adjusting wrench (14) is moved upward, the other end of the steel wire rope (12) passing through an inner hole of the backrest component (1) and being connected to a backrest adjusting gear (8), the steel wire rope (12) transmitting power for compressing a backrest adjusting spring (9).

4. The seat adjustment mechanism for a child stroller according to claim 3, characterized in that: The adjacent surfaces of the front enclosure socket (7) and the backrest adjustment seat (11) are mating surfaces to each other, the front enclosure socket (7) is provided with an arc-shaped slider (17), and the backrest adjustment seat (11) is provided with an arc-shaped groove (18) that slides in cooperation with the arc-shaped slider (17); the adjacent surfaces of the front enclosure socket (7) and the seat frame connecting member (6) are mating surfaces to each other, the front enclosure socket (7) is provided with a guide groove, and the seat frame connecting member (6) is provided with a guide slider that slides in cooperation with the guide groove, all of which are used to realize that the seat frame connecting member (6), the front enclosure socket (7) and the backrest adjustment seat (11) can rotate coaxially.

5. The seat adjustment mechanism for a child stroller according to claim 4, characterized in that: A second locking component for locking the rotation of the front enclosure socket (7) is provided on the seat plug (3) at a position on the outer wall corresponding to the front enclosure socket (7), and a second unlocking component cooperating with the second locking component is provided on the backrest component (1).

6. The seat adjustment mechanism for a child stroller according to claim 5, characterized in that: The second locking assembly comprises a vehicle retracting gear (5) slidably arranged on the seat frame connecting member (6); a vehicle retracting spring (4) is arranged between the vehicle retracting gear (5) and the seat plug (3) for driving the vehicle retracting gear (5) to slide towards the backrest adjustment gear (8); a meshing tooth (19) is arranged on the vehicle retracting gear (5); and a meshing groove (20) meshing with the meshing tooth (19) is arranged on the seat frame connecting member (6) and the front enclosure socket (7); after the meshing tooth (19) and the meshing groove (20) are meshed with each other, the seat frame connecting member (6) and the front enclosure socket (7) are locked from relative rotation.

7. The seat adjustment mechanism for a child stroller according to claim 6, characterized in that: The first unlocking component comprises a transmission rod (21) fixedly connected to the vehicle retracting gear (5); the other end of the transmission rod (21) passes through the inner holes on the seat frame connecting member (6) and the front wall socket (7) and then abuts against the driving inclined surface on the backrest adjustment seat (11); the transmission rod (21) and the driving inclined surface form an inclined surface driving match; the transmission rod (21) moves forward relative to the driving inclined surface, and the inclined surface driving force provided by the driving inclined surface can be converted into the elastic driving force reserved by the vehicle retracting spring (4), so that the meshing teeth (19) are disengaged from the meshing groove (20), the front wall socket (7) can rotate relative to the seat frame connecting member (6), and the seat frame connecting member (6) rotates relative to the seat plug (3); the transmission rod (21) moves backward relative to the driving inclined surface, and the meshing teeth (19) mesh with the two sets of meshing groove (20) components, thereby limiting the rotation of the front wall socket (7) and the seat frame connecting member (6) relative to the seat plug (3).

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