Child safety seat

Abstract

A child safety seat includes: a base unit; the seat unit is movably arranged on the base unit and comprises a seat base and a seat backrest connected to the rear side of the seat base; the posture adjusting mechanism is arranged between the seat unit and the base unit; the seat is characterized in that the seat further comprises a support, the support is provided with a first connecting piece and a second connecting piece, a first sliding limiting mechanism is arranged between the second connecting piece and the seat backrest, and a second sliding limiting mechanism is arranged between the base unit and the seat base. The second sliding limiting mechanism replaces the support to bear the weight of the seat base, the pressure applied by the seat unit to the support is shared, then the pressure borne by the support is reduced, and the service life of the support is prolonged. And on the other hand, due to the design that the second sliding limiting mechanism is arranged between the base and the seat base, the structural strength needed by the support is reduced at the same time, the overall production cost of the safety seat is reduced, and the safety seat has the advantage of being dual-purpose.

Description

Technical Field

[0001] The present invention relates to the technical field of seats for children, which are particularly suitable for vehicles. Background Art

[0002] With the improvement of living standards, more and more people choose to install child safety seats in cars to ensure the safety of children. In daily use, due to the different riding requirements and requirements for riding comfort of children of different heights and weights, safety seats usually have the function of adjustable pitch angle. During the pitch angle adjustment process, the seat needs to slide forward and backward relative to the base. Traditional child safety seats adjust the pitch posture of the safety seat by pulling the handle of the gear adjustment mechanism forward and upward to control the gear lever to engage in different gear slots; however, in the process of switching the gear lever between different gear slots, the seat is easily rotated around the gear lever and tilted backward after being pulled forward and upward. At this time, if the child is in the seat, the head will collide with the seat due to the sudden backward tilt, which is less safe. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a child safety seat which has stable seat movement and can prevent the seat from tilting backward when the pitch angle is adjusted, in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: the child safety seat comprises:

[0005] Base unit;

[0006] A seat unit, movably disposed on the base unit, comprising a seat base and a seat back connected to the rear side of the seat base;

[0007] A posture adjustment mechanism, disposed between the seat unit and the base unit, for adjusting the pitch angle of the seat unit relative to the base unit;

[0008] It is characterized in that: it also includes a bracket, which has a first connecting member connected to the base unit, and a second connecting member connected to the rear side of the first connecting member and extending upwardly at an angle, a first sliding limit mechanism is provided between the second connecting member and the seat back, and a second sliding limit mechanism is provided between the base unit and the seat base; when the posture adjustment mechanism is used to adjust the pitch angle of the seat unit relative to the base unit, the first sliding limit mechanism can make the seat back slide and limit relative to the second connecting member in the length direction of the seat back, and the second sliding limit mechanism can make the seat base slide and limit on the base unit in the front and rear directions of the seat base.

[0009] In order to facilitate users to adjust the caster angle, further, the first sliding limit mechanism includes:

[0010] A guide slide bar is arranged on the second connecting member, and the guide slide bar is arranged transversely;

[0011] Two sets of symmetrical and spaced slide grooves are arranged on the rear side of the seat back, and the length direction of the two sets of slide grooves is perpendicular to the length direction of the guide slide rod. The two ends of the guide slide rod extend into the two sets of slide grooves and slide with the two sets of slide grooves. Through the sliding cooperation relationship between the two sets of slide grooves and the guide slide rod, the seat back can slide back and forth in the length direction of the second connecting member, and the symmetrically arranged slide grooves make the length of the guide slide rods on both sides of the second connecting member equal during the sliding process of the seat back, so that the seat back is not easy to tip over to one side, which increases the safety of children when using it, and also has a protective effect on the guide slide rod. At the same time, it also makes it possible to use a single bracket to adjust the pitch angle of the seat unit.

[0012] In order to facilitate the user to adjust the forward tilt angle, further, the second sliding limit mechanism includes:

[0013] Two groups of guide sliders are arranged symmetrically and spaced apart on the base unit. The seat base is provided with two slide holes arranged symmetrically and spaced apart. The slide holes are distributed in an arc shape along the front-rear direction of the seat base. The two groups of guide sliders are respectively slidably limited in the two groups of slide holes and slidably cooperate with the two groups of slide holes. The sliding cooperation between the slide holes on the seat base and the guide sliders arranged on the base unit prevents the bracket from bearing the gravity of the seat base. At the same time, the gravity of the seat base is applied to the guide sliders symmetrically distributed on the base unit, so that the left and right sides of the seat base are balanced without tilting, so that the center of gravity of the seat base is stable, and the stability of the single bracket when adjusting the pitch angle of the seat unit is further enhanced.

[0014] In order to prevent the seat unit from being separated from the base unit when adjusting the pitch angle, the guide slider further comprises:

[0015] A sliding pin is vertically inserted into the sliding hole and slidingly engaged with the inner wall of the sliding hole;

[0016] The limit block is connected to the sliding pin, the width of the limit block is greater than the width of the sliding hole, and the limit block is disposed outside the sliding hole to limit the upward movement of the seat unit relative to the base. When the seat unit slides relative to the base unit, the upper opening of the sliding hole abuts against the lower surface of the limit block, and the sliding pin slides along the hole wall of the sliding hole.

[0017] In order to make the movement of the slider in the slide hole smoother, the seat unit further includes a guide rail member arranged at the upper opening of the slide hole, the upper surface of the guide rail member is slidably matched with the lower surface of the limit block, the guide rail member is penetrated by a first through hole for the sliding pin to pass through, the first through hole is connected to the slide hole, the sliding pin passes through the slide hole and the first through hole from bottom to top in sequence and is fixedly connected to the limit block at the upper end. When adjusting the forward tilt angle, the limit block can slide along the upper surface of the guide rail member, and the guide rail member plays a role in assisting sliding.

[0018] In order to further reduce the pressure on the bracket, the posture adjustment mechanism further comprises:

[0019] Two groups of symmetrically spaced gear rails are arranged on the base unit, and the gear rails are provided with gear slots spaced along the front-rear direction of the seat base. Correspondingly, a gear adjustment mechanism is connected to the seat base, and the gear adjustment mechanism includes an action member for applying external force and a gear lever that cooperates with the action member in transmission. The gear lever is arranged between the two groups of gear rails, and the two ends of the gear lever are adapted to the corresponding two groups of gear slots. The gear lever can be inserted into any group of corresponding gear slots and can also be disengaged from the group of gear slots.

[0020] When the operating member drives the shift lever to disengage from a corresponding shift slot, the seat unit can adjust its pitch angle relative to the base unit under the sliding cooperation of the first sliding limit mechanism and the second sliding limit mechanism; when the operating member drives the shift lever to engage in a corresponding shift slot, the pitch angle of the seat unit relative to the base unit is locked. The shift rail provided on the base unit allows the gravity of the seat unit to be supported by the shift rail instead of being directly applied to the bracket.

[0021] In order to increase the stability of the pitch angle adjustment of the seat unit, further, the lower surface of the seat base is partially recessed inward to form a sliding portion, the surface of the sliding portion is adapted to the shape of the upper surface of the gear rail and can slide forward and backward along the upper surface of the gear rail. The sliding cooperation between the sliding portion and the gear rail plays a role in guiding the sliding.

[0022] In order to improve the comfort of children, that is, to adjust the seat unit in different directions, the base unit further includes a base, a rotating disk rotatably connected in the base, and a rotation limit assembly arranged on the base, the seat unit is arranged on the rotating disk, and the rotation limit assembly can act on the rotating disk to limit the rotation position of the rotating disk. The rotating disk enables the seat unit to be rotated relative to the base, and when adjusted to an appropriate angle, the rotation limit assembly can limit the rotating disk to the rotation position.

[0023] In order to prevent the seat unit from tilting backward during rotation, the first connecting member is further fixedly connected to the surface of the rotating disk, and the second connecting member is connected to the seat back to support the seat back, and part or the whole of the second connecting member is embedded in the seat back to support the seat back. The first connecting member is fixedly connected to the surface of the rotating disk so that the bracket can rotate synchronously with the rotating disk and the seat unit, and the relative position of the bracket and the seat unit remains unchanged during the rotation process, so that the second connecting member always supports the seat back during the rotation process.

[0024] In order to avoid the danger caused by the rotating disk and the base being separated due to the change of the center of gravity of the seat unit during the rotation process, the base unit further includes a ring-shaped limit pressure ring fixedly connected to the base, the rotating disk is arranged between the limit pressure ring and the base, and a limit portion is formed on the limit pressure ring, which can cooperate with the rotating disk to achieve axial limit of the rotating disk. The limit portion of the limit pressure ring limits the axial outward movement of the rotating disk.

[0025] Compared with the prior art, the advantages of the present invention are:

[0026] 1. The child safety seat of the present invention is provided with a first sliding limit mechanism so that the seat back is slidably limited relative to the second connecting member in the length direction of the seat back, and the second sliding limit mechanism is provided so that the seat base is slidably limited on the base unit in the front-rear direction of the seat base, thereby enabling the seat back and the seat base to slide in limited directions in their respective directions, thereby avoiding the occurrence of the seat unit tilting backward during the pitch angle adjustment process;

[0027] 2. In the child safety seat of the present invention, the second sliding limit mechanism is arranged between the base and the seat base, so that the second sliding limit mechanism replaces the bracket to bear the weight of the seat base, shares the pressure exerted by the seat unit on the bracket, and thus reduces the pressure borne by the bracket, has a protective effect on the bracket, and extends the service life of the bracket; on the other hand, the design of the second sliding limit mechanism being arranged between the base and the seat base also reduces the structural strength required for the bracket, which is conducive to the manufacturer using materials with lower structural strength to make the bracket, reduces the overall production cost of the safety seat, and has the advantage of "one thing for two uses". BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a child safety seat according to an embodiment of the present invention;

[0029] Figure 2 An exploded view of the structure of a child safety seat according to an embodiment of the present invention;

[0030] Figure 3 is a cross-sectional view of a child safety seat according to an embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of the assembly relationship between the seat unit, the bracket, and the gear adjustment mechanism according to an embodiment of the present invention;

[0032] Figure 5 A rear view of a seat unit according to an embodiment of the present invention;

[0033] Figure 6 It is a structural exploded diagram of the posture adjustment mechanism of an embodiment of the present invention;

[0034] Figure 7 is a cross-sectional view of another depth of the child safety seat according to an embodiment of the present invention;

[0035] Figure 8 It is a partial structural exploded diagram of a base unit and a seat unit according to an embodiment of the present invention;

[0036] Fig. 9 is a schematic diagram of a partial structure of a base unit according to an embodiment of the present invention;

[0037] Fig.10 It is a schematic structural diagram of a limit pressure ring according to an embodiment of the present invention;

[0038] Fig.11 A schematic diagram of the structure of a baffle according to an embodiment of the present invention;

[0039] Fig.12 for Figure 7 A partial enlarged view of the middle A;

[0040] Fig.13 for Figure 7 A partial enlarged view of point B in the middle;

[0041] Fig.14 for Figure 7 A partial enlarged view of point C in the middle;

[0042] Fig.15 It is a schematic diagram of the assembly relationship of the rotating disk, the gear rail and the sliding block according to an embodiment of the present invention;

[0043] Fig.16 It is a structural schematic diagram of a rotation limiting assembly according to an embodiment of the present invention;

[0044] Fig.17 A schematic diagram of the assembly relationship between the base unit and the bracket according to an embodiment of the present invention;

[0045] Fig.18 for Fig.17 A magnified view of the circled area. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below with reference to the accompanying drawings.

[0047] like Figures 1 to 18 The figure shows the best embodiment of the present invention. The child safety seat of this embodiment is mainly used to ensure the safety of children. The seat unit of the existing child safety seat is basically arranged on the base through two symmetrically arranged steel brackets. The forward tilt, backward tilt and gear adjustment mechanism of the seat are all matched with the brackets, so that the brackets are under great pressure and are prone to fatigue after long-term use. In addition, the two steel brackets greatly increase the weight of the child safety seat, which increases the difficulty of installation for users. Therefore, it will be beneficial to provide a child safety seat with a smaller bracket load-bearing capacity, a longer service life and the ability to use a smaller weight bracket. The detailed structure of the child safety seat will be described below:

[0048] See also Figures 1 to 3 The child safety seat of this embodiment includes a base unit 1, a seat unit 2 movably arranged on the base unit 1, a posture adjustment mechanism arranged between the seat unit 2 and the base unit 1, and a bracket 3; wherein the seat unit 2 includes a seat base 21 and a seat back 22 connected to the rear side of the seat base 21; the posture adjustment mechanism is used to adjust the pitch angle of the seat unit 2 relative to the base unit 1; the bracket 3 has a first connecting member 31 connected to the base unit 1 and a second connecting member 32 connected to the rear side of the first connecting member 31 and extending upwardly obliquely, a first sliding limit mechanism is arranged between the second connecting member 32 and the seat back 22, and a second sliding limit mechanism is arranged between the base unit 1 and the seat base 21; when the posture adjustment mechanism is used During the process of adjusting the pitch angle of the seat unit 2 relative to the base unit 1, the first sliding limit mechanism can make the seat back 22 slide and limit relative to the second connecting member 32 in the length direction of the seat back 22, and the second sliding limit mechanism can make the seat base 21 slide and limit on the base unit 1 along the front and rear direction of the seat base 21, wherein the number of brackets 3 is only one, and the single bracket structure of the child safety seat reduces the overall weight of the safety seat, and adopts the first sliding limit mechanism and the second sliding limit mechanism as the rearward inclination guide structure of the seat back and the forward inclination guide structure of the seat base respectively, thereby overcoming the difficulty of using a single bracket for adjusting the pitch angle of the seat unit, facilitating transportation and installation and reducing the production cost of the safety seat.

[0049] See also Figure 4The first sliding limit mechanism includes a guide slide bar 321 arranged transversely on the second connecting member 32, and two groups of symmetrical and spaced slide grooves 221 arranged on the rear side of the seat back 22. The length directions of the two groups of slide grooves 221 are perpendicular to the length direction of the guide slide bar 321, and the two ends of the guide slide bar 321 respectively extend into the two groups of slide grooves 221 and slide with the two groups of slide grooves 221. The symmetrically arranged slide grooves 221 make the guide slide bars 321 on both sides of the second connecting member 32 equal in length during the sliding process of the seat back 22, so that the seat back 22 is not easy to tip over to one side, which increases the safety of children when using the seat back 22 and also protects the guide slide bars 321. At the same time, it also makes it possible to adjust the pitch angle of the seat unit 2 with a single bracket, which is convenient for users to adjust the rearward tilt angle. The two ends of the guide slide bar 321 of this embodiment extend into the two groups of slide grooves 221 respectively and also respectively abut against the bottom of the slide groove 221, so that the slide groove 221 limits the circumferential rotational movement of the guide slide bar 321 relative to the seat back 22, thereby limiting the circumferential rotational movement of the seat unit 2 relative to the bracket 3, and further increasing the stability of the seat unit 2 during rotation.

[0050] See also Figure 3 and Figure 5 The second sliding limit mechanism includes two groups of guide sliders 4 symmetrically arranged at intervals on the base unit 1, and two slide holes 211 symmetrically arranged at intervals on the seat base 21. The slide holes 211 are distributed in an arc shape along the front and rear directions of the seat base 21. The two groups of guide sliders 4 are respectively slidably limited in the two groups of slide holes 211 and slidably cooperate with the two groups of slide holes 211. The sliding cooperation between the slide holes 211 on the seat base 21 and the guide sliders 4 arranged on the base unit 1 prevents the bracket 3 from bearing the gravity of the seat base 21. At the same time, the gravity of the seat base 21 is applied to the guide sliders 4 symmetrically distributed on the base unit 1, so that the left and right sides of the seat base are balanced without tilting. The center of gravity of the seat base 21 is stable, which further enhances the stability of the single bracket when adjusting the pitch angle of the seat unit 2, and facilitates the user to adjust the forward tilt angle.

[0051] The guide slider 4 includes a sliding pin 41 and a stopper 42 connected to the sliding pin 41, wherein the sliding pin 41 is vertically inserted into the sliding hole 211 and slides with the inner wall of the sliding hole 211; the stopper 42 has a width greater than the width of the sliding hole 211 and is disposed against the outside of the sliding hole 211 to limit the upward movement of the seat unit 2 relative to the base 11. When the seat unit 2 slides relative to the base unit 1, the upper opening of the sliding hole 211 abuts against the lower surface of the stopper 42, and the sliding pin 41 slides along the hole wall of the sliding hole 211, thereby preventing the seat unit 2 from being separated from the base unit 1 when the pitch angle is adjusted.

[0052] The seat unit 2 further comprises a guide rail member 23 disposed at the upper opening of the slide hole 211, the upper surface of the guide rail member 23 is slidably matched with the lower surface of the limit block 42, the guide rail member 23 is penetrated with a first through hole 231 for the slide pin 41 to pass through, the first through hole 231 is connected with the slide hole 211, the slide pin 41 passes through the slide hole 211 and the first through hole 231 from bottom to top in sequence and is fixedly connected to the limit block 42 at the upper end. When adjusting the forward tilt angle, the limit block 42 can slide along the upper surface of the guide rail member 23, and the guide rail member 23 plays a role of auxiliary sliding, so that the guide slider 4 can move more smoothly in the slide hole 211.

[0053] See also Figure 3 and Figure 5 The lower surface of the seat base 21 is partially recessed inward to form a sliding portion 212, and the surface of the sliding portion 212 is adapted to the shape of the upper surface of the gear rail 5 and can slide forward and backward along the upper surface of the gear rail 5. The sliding cooperation between the sliding portion 212 and the gear rail 5 plays a role in guiding the sliding, thereby increasing the stability of the pitch angle adjustment of the seat unit 2.

[0054] See also Figure 6The posture adjustment mechanism includes two groups of symmetrically spaced gear rails 5 arranged on the base unit 1, and a gear adjustment mechanism 6 connected to the seat base 21. The gear rails 5 are provided with gear slots 51 spaced along the front and rear direction of the seat base 21. The gear adjustment mechanism 6 includes an action member 61 for applying external force and a gear lever 62 that cooperates with the action member 61 in transmission. The gear lever 62 is arranged between the two groups of gear rails 5, and the two ends of the gear lever 62 are adapted to the corresponding two groups of gear slots 51. The gear lever 6 2 can be inserted into any group of corresponding gear slots 51, and can also be separated from the group of gear slots 51; when the operating member 61 drives the gear rod 62 to be separated from a most corresponding gear slot 51, the seat unit 2 can adjust its own pitch angle relative to the base unit 1 under the sliding cooperation of the first sliding limit mechanism and the second sliding limit mechanism; when the operating member 61 drives the gear rod 62 to be inserted into a most corresponding gear slot 51, the pitch angle of the seat unit 2 relative to the base unit 1 is locked. The gear rail 5 set on the base unit 1 allows the gravity of the seat unit 2 to be supported by the gear rail 5 instead of being directly applied to the bracket 3, further reducing the pressure on the bracket 3. The user can pull the operating member 61 to make the gear rod 62 separate from the gear slot 51, and the seat unit 2 can slide relative to the bracket 3. When the gear rod 62 is released, the gear rod 62 is inserted into the gear slot 51 again.

[0055] In addition, in order to improve the riding comfort of children, it is necessary to adjust the seat unit 2 in different directions. Figure 7 The base unit 1 includes a base 11, a rotating disk 12 rotatably connected to the base 11, and a rotation limiting assembly 13 disposed on the base 11. The seat unit 2 is disposed on the rotating disk 12, and the rotation limiting assembly 13 can act on the rotating disk 12 to limit the rotation position of the rotating disk 12. The rotating disk 12 enables the seat unit 2 to be rotatably adjusted relative to the base 11. When adjusted to a proper angle, the rotation limiting assembly 13 can limit the rotating disk 12 to the rotation position.

[0056] See also Figures 8 to 9 The base unit 1 further includes a ring-shaped limit pressing ring 14 fixedly connected to the base 11. The rotating disk 12 is arranged between the limit pressing ring 14 and the base 11, and a limit portion 141 is formed on the limit pressing ring 14. The limit portion 141 can cooperate with the rotating disk 12 to achieve axial limit of the rotating disk 12. The limit portion 141 of the limit pressing ring 14 limits the axial outward movement of the rotating disk 12, thereby avoiding the danger caused by the rotation of the rotating disk 12 and the base 11 due to the change of the center of gravity of the seat unit 2 during the rotation process.

[0057] See also Fig.10The limiting portion 141 is a limiting step surface formed by the inner ring wall of the limiting pressure ring 14 protruding inward in the circumferential direction. The inner ring wall of the limiting pressure ring 14 is formed with a recessed portion 142 below the limiting portion 141, which is recessed inward in the circumferential direction relative to the limiting portion 141. The outer edge of the rotating disk 12 is against the limiting step surface located below the limiting portion 141 and against the limiting portion 141. At the same time, a gap 143 is left between the outer edge of the rotating disk 12 and the recessed portion 142 for the rotating disk 12 to rotate. The gap 143 prevents the rotating disk 12 from generating friction with the limiting pressure ring 14 during the rotation process, and the rotating disk 12 rotates smoothly, which is more labor-saving to adjust, and is convenient for users to rotate and adjust the seat unit 2.

[0058] See also Figure 8 and Fig. 9 A baffle 16 is provided between the rotating disk 12 and the limiting pressure ring 14. The structural strength of the baffle 16 is greater than that of the limiting pressure ring 14. The baffle 16 is located on the inner side of the inner ring wall of the limiting pressure ring 14. The baffle 16 is located on the inner side of the inner ring wall of the limiting pressure ring 14 so that it can avoid direct friction between the rotating disk 12 and the limiting pressure ring 14, and can prevent the rotating disk 12 from directly impacting the limiting pressure ring 14, thereby extending the service life of the limiting pressure ring 14 and enhancing the impact bearing capacity of the limiting pressure ring 14.

[0059] See also Figures 9 to 12 The recessed portion 142 of the limiting pressure ring 14 is inwardly recessed to form a baffle groove 144 for installing the baffle 16. The baffle 16 is arranged in the baffle groove 144. The baffle 16 includes a connecting portion 161 and an L-shaped bending portion 162. The connecting portion 161 is provided with a connecting hole 1611. The limiting pressure ring 14 is arranged on the base 11 through a fastener 17. The fastener 17 passes through the connecting hole 1611 on the connecting portion 161 and connects the baffle 16 with the limiting pressure ring 14, thereby improving the stability of the connection between the baffle 16 and the limiting pressure ring 14; the L-shaped bending portion 162 is connected to one side of the connecting portion 161, and the top of the L-shaped bending portion 162 is against the lower surface of the limiting portion 141. The L-shaped bending portion 162 can block the axial impact of the rotating disk 12 on the limiting portion 141, thereby protecting the limiting portion 141 and enhancing the impact bearing capacity of the limiting portion 141.

[0060] See also Figure 8 and Fig.15 The base 11 is provided with a through hole 111, and a rotating shaft 121 is formed at the center of the rotating disk 12 in an axially protruding manner. The rotating shaft 121 is adapted to and penetrates the through hole 111. The rotating disk 12 is rotatably connected in the base 11 through the rotating shaft 121, and the central axis of the rotating shaft 121 is recorded as the rotating axis a. The rotating connection between the rotating shaft 121 and the through hole 111 enables the rotating disk 12 to stably perform circumferential rotational motion around the rotating axis a, thereby improving the rotational stability of the rotating disk 12.

[0061] See also Fig.13 and Fig.15 The rotating shaft 121 is axially penetrated with a mounting hole 1211, and a connecting piece 15 is provided between the rotating shaft 121 and the base 11. The connecting piece 15 axially passes through the mounting hole 1211 to axially limit the rotating shaft 121 and the base 11. The arrangement of the connecting piece 15 can prevent the rotating disk 12 from axially separating from the base 11, increase the stability of the connection between the rotating disk 12 and the base 11, and improve the safety of children riding.

[0062] See also Fig. 9 , Fig.10 , Fig.14 , Fig.15 and Fig.16 A slot 122 is concave inwardly provided on the outer edge of the rotating disk 12 in a partial circumferential direction, and four slots are evenly spaced around the rotating disk 12. The rotation limiting assembly 13 includes a bayonet member 131 and a compression spring 132, wherein the bayonet member 131 is slidably arranged on the base 11 along the radial direction of the rotating disk 12, and a bayonet 1311 is provided on the bayonet member 131, and a handle 1312 exposed on the outer surface of the base 11 is provided on the bayonet member 131. The bayonet member 131 is adapted to and relatively arranged with the slot 122, and a notch 145 is provided on the limiting pressure ring 14 for the bayonet pin 1311 to penetrate into the slot 122; the compression spring 132 is arranged between the base 11 and the bayonet member 131, and has a tendency to radially press the bayonet member 131 radially inwardly along the radial direction of the rotating disk 12. The user can unlock the rotation position of the rotating disk 12 by applying radial force to the bayonet 131, and can also release the bayonet 131 to allow the compression spring 132 to rebound and push the bayonet 131 to reset and re-lock the rotation position of the rotating disk 12, so that the user can adjust the rotation position of the rotating disk 12 multiple times. The base 11 is provided with radially distributed sliding holes 112, and the bayonet 131 partially protrudes downward and is connected to a sliding member 133, which slides with the sliding hole 112 to facilitate the reciprocating movement of the bayonet 131 in the radial direction.

[0063] See also Figure 7 , the first connecting member 31 is fixedly connected to the surface of the rotating disk 12, and the second connecting member 32 is connected to the seat back 22 to support the seat back 22, and part or the whole of the second connecting member 32 is embedded in the seat back 22 to support the seat back 22. The first connecting member 31 is fixedly connected to the surface of the rotating disk 12 so that the bracket 3 can rotate synchronously with the rotating disk 12 and the seat unit 2, and the relative position of the bracket 3 and the seat unit 2 remains unchanged during the rotation process, so that the second connecting member 32 always supports the seat back 22 during the rotation process, thereby preventing the seat unit 2 from tilting backward during the rotation process.

[0064] See also Figure 4 and Figure 7The rear side surface of the seat back 22 is concavely provided with an embedding groove 222 for embedding the second connecting member 32, and the bottom of the embedding groove 222 contacts the second connecting member 32. The provision of the embedding groove 222 facilitates the positioning and installation of the bracket 3 by the manufacturer. The bottom of the embedding groove 222 contacts the second connecting member 32, so that the bracket 3 can withstand the pressure of the seat back 22 and the child backward. At the same time, the second connecting member 32 embedded in the embedding groove 222 can also limit the circumferential rotational movement of the seat back 22 relative to the second connecting member 32, so that the seat unit 2 can remain stationary relative to the bracket 3 in the rotating state, so that the bracket 3 can always support the seat back 22 during the rotation adjustment, further increasing the stability of the seat unit 2 during the rotation process. The inclination angle of the second connecting member 32 is the same as the inclination angle of the seat back 22. This technical solution enables the second connecting member 32 and the seat back 22 to be arranged parallel to each other, preventing the seat back 22 from interfering with each other during assembly and rotation and thus wearing the seat back 22 , thereby extending the service life of the seat back 22 .

[0065] The rear side surface of the seat back 22 is provided with a slide groove 221 that is tilted forward and backward, and the second connecting member 32 is provided with a connecting rod 43 that is slidably matched with the slide groove 221. The matching of the connecting rod 43 and the slide groove 221 enables the seat back 22 to be adjusted in a rearward tilt angle relative to the bracket 3. At the same time, during the sliding process, the matching surface between the connecting rod 43 and the slide groove 221 also shares the backward pressure of the seat back 22 and the child, further enhancing the stability and facilitating the user to adjust the pitch angle of the seat unit 2.

[0066] See also Fig.17 The base 11 is an L-shaped base with a base backrest 18, and a connecting structure 7 is provided between the second connecting member 32 and the front side of the base backrest 18. The setting of the connecting structure 7 strengthens the connection relationship between the base 11 and the second connecting member 32, so that the base backrest 18 can share the pressure on the second connecting member 32; at the same time, because the second connecting member 32 is connected to the seat backrest 22, the connecting structure 7 also makes the base backrest 18 indirectly connected to the seat backrest 22, avoiding the phenomenon of the base 11 and the seat unit 2 being separated due to the forward tilt of the seat unit 2 in a certain posture, and enhancing the load-bearing capacity of the bracket 3, improving the safety of children riding, and having the advantage of "one object with two uses".

[0067] See also Fig.18The connection structure 7 includes a first connection hook 71 and a second connection hook 72, wherein the first connection hook 71 is fixedly disposed on the front side of the base backrest 18, and the second connection hook 72 is fixedly disposed on the upper end of the second connection member 32, and is connected to the first connection hook 71 in the upper limit position in the front-back direction, and is relatively movable with the first connection hook 71 in the rotation direction of the rotating disk 12, so that when the bracket 3 rotates relative to the base 11, the first connection hook 71 and the second connection hook 72 can be relatively separated. When the seat unit 2 is facing forward, the first connection hook 71 and the second connection hook 72 are connected in the upper limit position in the front-back direction to prevent forward tilting, and when the seat unit 2 rotates relative to the base 11, the first connection hook 71 and the second connection hook 72 are separated from each other, so that the rotational movement of the seat unit 2 is not restricted by the connection structure 7, so that the connection structure 7 can adapt to the rotational movement of the seat unit 2 relative to the base 11.

[0068] The first connecting hook 71 has two sides perpendicular to the rotation direction through which the second connecting hook 72 is rotated and disengaged, and the second connecting hook 72 has two sides perpendicular to the rotation direction through which the first connecting hook 71 is rotated and disengaged, respectively. An avoidance groove 181 is recessed on the front side of the base backrest 18 corresponding to the second connecting hook 72, and the avoidance groove 181 is used to avoid the rotational movement of the second connecting hook 72 relative to the base 11. The design of the avoidance groove 181 can avoid the interference between the second connecting hook 72 and the base backrest 18 during the rotation adjustment process, so as to facilitate the user to rotate and adjust the seat unit 2.

[0069] The child safety seat of this embodiment can achieve the following functions:

[0070] 1) Rotational adjustment: the user pulls the handle 1312 forward, the pin 1311 disengages from the slot 122, the compression spring 132 is compressed, and the user applies force to the seat unit 2 for rotational adjustment, and the first connecting hook 71 disengages from the second connecting hook 72; when the user rotates the seat unit 2 to an appropriate angle, the handle 1312 is released, the pin 1311 re-engages in the slot 122, and the rotational adjustment is completed; during the rotation process, the seat unit 2 rotates synchronously with the bracket 3 so that the bracket 3 always supports the seat back 22 during the rotation process to avoid the seat unit 2 tilting outward during rotation.

[0071] 2) Pitch angle adjustment: the user pulls the action member 61 forward, and the shift lever 62 disengages from the shift slot 51 so that the seat unit 2 can slide relative to the bracket 3. Then, the user keeps the action member 61 pulled forward and simultaneously pulls forward or pushes the seat unit 2 and the action member 61 backward to adjust the pitch angle. During the adjustment process, the slide slot 211 slides along the guide slide bar 321 so that the rearward tilt angle of the seat back 22 changes, and the guide slide block 4 slides along the guide rail member 32 and the slide hole 211 so that the forward tilt angle of the seat base 21 changes; after sliding to an appropriate angle, the user releases the action member 61, and the shift lever 62 re-engages the shift slot 51, and the pitch angle adjustment is completed; during this adjustment process, the bracket 3 only bears the pressure applied to the second connecting member 32 by the seat back 22 and the child's back, while the pressure of the seat base 21 and the area below the child's buttocks is transmitted to the base 11 through the shift rail 5 to bear the pressure, thereby reducing the pressure borne by the bracket 3 and extending the service life of the child safety seat;

[0072] In addition, since the bracket 3 has a small load-bearing capacity, the pitch angle adjustment of the child safety seat of this embodiment can be designed as a single-bracket structure, and the symmetrically distributed slide groove 221, guide slider 4, gear rail 5, guide rail member 23, slide hole 211, and sliding portion 212 ensure the stability of the movement of the seat unit 2 during the pitch angle adjustment process, and avoid the occurrence of the seat unit 2 tilting to one side after the shift lever 62 is separated from the shift groove 51.

Claims

1. A child safety seat, comprising: Base unit (1); A seat unit (2) movably disposed on the base unit (1), comprising a seat base (21) and a seat back (22) connected to the rear side of the seat base (21); A posture adjustment mechanism, arranged between the seat unit (2) and the base unit (1), and used for adjusting the pitch angle of the seat unit (2) relative to the base unit (1); The invention is characterized in that: it also includes a bracket (3), the bracket (3) having a first connecting member (31) connected to the base unit (1), and a second connecting member (32) connected to the rear side of the first connecting member (31) and extending upwardly at an angle, a first sliding limit mechanism is provided between the second connecting member (32) and the seat back (22), and a second sliding limit mechanism is provided between the base unit (1) and the seat base (21); when the posture adjustment mechanism is used to adjust the pitch angle of the seat unit (2) relative to the base unit (1), the first sliding limit mechanism can make the seat back (22) slide relative to the second connecting member (32) in the length direction of the seat back (22), and the second sliding limit mechanism can make the seat base (21) slide on the base unit (1) in the front and rear directions of the seat base (21).

2. The child safety seat according to claim 1, characterized in that: The first sliding limiting mechanism comprises: A guide slide bar (321) is arranged on the second connecting member (32), and the guide slide bar (321) is arranged transversely; Two groups of symmetrical and spaced slide grooves (221) are arranged on the rear side of the seat back (22), the length direction of the two groups of slide grooves (221) is perpendicular to the length direction of the guide slide rod (321), and the two ends of the guide slide rod (321) respectively extend into the two groups of slide grooves (221) and slide in cooperation with the two groups of slide grooves (221).

3. The child safety seat according to claim 1 or 2, characterized in that: The second sliding limiting mechanism comprises: Two groups of guide sliders (4) are arranged on the base unit (1) at intervals of symmetry. The seat base (21) is provided with two slide holes (211) at intervals of symmetry. The slide holes (211) are distributed in an arc shape along the front-rear direction of the seat base (21). The two groups of guide sliders (4) are respectively slidably limited in the two groups of slide holes (211) and slidably cooperate with the two groups of slide holes (211).

4. The child safety seat according to claim 3, characterized in that: The guide slider (4) comprises: A sliding pin (41) is vertically inserted into the sliding hole (211) and slidingly cooperates with the inner wall of the sliding hole (211); The limit block (42) is connected to the sliding pin (41), the width of the limit block (42) is greater than the width of the sliding hole (211), and is disposed against the outside of the sliding hole (211) to limit the upward movement of the seat unit (2) relative to the base (11).

5. The child safety seat according to claim 4, characterized in that: The seat unit (2) further comprises a guide rail member (23) arranged at the upper opening of the sliding hole (211); the upper surface of the guide rail member (23) is slidably matched with the lower surface of the limit block (42); the guide rail member (23) is penetrated by a first through hole (231) for the sliding pin (41) to pass through; the first through hole (231) is connected to the sliding hole (211); the sliding pin (41) passes through the sliding hole (211) and the first through hole (231) in sequence from bottom to top and is fixedly connected to the limit block (42) at the upper end.

6. The child safety seat according to claim 1, characterized in that: The posture adjustment mechanism comprises: Two groups of symmetrically spaced gear rails (5) are arranged on the base unit (1), and the gear rails (5) are provided with gear slots (51) spaced along the front-rear direction of the seat base (21). Correspondingly, the seat base (21) is connected with a gear adjustment mechanism (6), and the gear adjustment mechanism (6) includes an action member (61) for applying external force and a gear lever (62) in transmission cooperation with the action member (61). The gear lever (62) is arranged between the two groups of gear rails (5), and the two ends of the gear lever (62) are adapted to the corresponding two groups of gear slots (51). The gear lever (62) can be inserted into any group of corresponding gear slots (51) and can also be detached from the group of gear slots (51). When the operating member (61) drives the shift lever (62) to disengage from a most corresponding shift slot (51), the seat unit (2) can adjust its own pitch angle relative to the base unit (1) under the sliding cooperation of the first sliding limit mechanism and the second sliding limit mechanism; when the operating member (61) drives the shift lever (62) to engage in a most corresponding shift slot (51), the pitch angle of the seat unit (2) relative to the base unit (1) is locked.

7. The child safety seat according to claim 6, characterized in that: The lower surface of the seat base (21) is partially recessed inward to form a sliding portion (212), the surface of the sliding portion (212) is adapted to the shape of the upper surface of the gear rail (5) and can slide forward and backward along the upper surface of the gear rail (5).

8. The child safety seat according to claim 1 or 2, characterized in that: The base unit (1) comprises a base (11), a rotating disk (12) rotatably connected to the base (11), and a rotation limiting assembly (13) arranged on the base (11); the seat unit (2) is arranged on the rotating disk (12); and the rotation limiting assembly (13) can act on the rotating disk (12) to limit the rotation position of the rotating disk (12).

9. The child safety seat according to claim 8, characterized in that: The first connecting member (31) is fixedly connected to the surface of the rotating disk (12), and the second connecting member (32) is connected to the seat back (22) to support the seat back (22), and part or the whole of the second connecting member (32) is embedded in the seat back (22) to support the seat back (22).

10. The child safety seat according to claim 8, characterized in that: The base unit (1) further comprises a limiting pressure ring (14) which is fixedly connected to the base (11) and is arranged in an annular shape. The rotating disk (12) is arranged between the limiting pressure ring (14) and the base (11). A limiting portion (141) is formed on the limiting pressure ring (14). The limiting portion (141) can cooperate with the rotating disk (12) to achieve axial limiting of the rotating disk (12).

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