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 utility model relates to the technical field of the seat for children specially applicable to vehicles. BACKGROUND

[0002] With the improvement of living standards, more and more people choose to install child safety seats on the car to protect the safety of children in the car, and in daily use, due to the different requirements of children of different height and weight for riding and the requirements for riding comfort, the safety seat usually has the function of adjusting the pitch angle, and the seat needs to slide forward and backward relative to the base during the pitch angle adjustment, the traditional child safety seat adjusts the pitch attitude of the safety seat by pulling the handle of the gear adjustment mechanism upward and forward to control the gear rod to be clamped into different gear slots, however, during the switching of the gear rod between different gear slots, the seat is easy to rotate around the gear rod and then lean 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 leaning, and the safety is poor. SUMMARY

[0003] The utility model solves the technical problem in the prior art, and provides a child safety seat with stable seat movement during pitch angle adjustment and capable of preventing the seat from leaning backward.

[0004] The utility model adopts the technical scheme that the child safety seat comprises:

[0005] A base unit;

[0006] A seat unit movably arranged 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 arranged between the seat unit and the base unit and used for adjusting the pitch angle of the seat unit relative to the base unit;

[0008] Characterized in that it further comprises a bracket, the bracket has a first connecting piece connected with the base unit, and a second connecting piece connected with the rear side of the first connecting piece and extending upward and obliquely, a first sliding limiting mechanism is arranged between the second connecting piece and the seat back, and a second sliding limiting mechanism is arranged between the base unit and the seat base; during the adjustment of the pitch angle of the seat unit relative to the base unit by using the posture adjustment mechanism, the first sliding limiting mechanism enables the seat back to slide and be limited in the length direction of the seat back relative to the second connecting piece, and the second sliding limiting mechanism enables the seat base to slide and be limited on the base unit in the front-rear direction of the seat base.

[0009] In order to facilitate the user to adjust the backward angle, further, the first sliding limiting mechanism comprises:

[0010] A guide slide rod is installed on the second connector, and the guide slide rod is set laterally.

[0011] Two sets of symmetrical and spaced-apart sliding grooves are provided on the side of the seat back. The length direction of the two sets of sliding grooves is perpendicular to the length direction of the guide rods. The two ends of the guide rods extend into the two sets of sliding grooves respectively and slide in engagement with them. Through the sliding engagement of the two sets of sliding grooves and the guide rods, the seat back can slide back and forth along the length direction of the second connector. The symmetrical arrangement of the sliding grooves ensures that the lengths of the guide rods on both sides of the second connector are equal during the sliding process, making the seat back less likely to tilt to one side, increasing the safety of children during use, and also protecting the guide rods. It also makes it possible to use a single bracket to adjust the tilt angle of the seat unit.

[0012] To facilitate user adjustment of the lean angle, the second sliding limit mechanism further includes:

[0013] Two sets of symmetrically spaced guide sliders are disposed on the base unit. The seat base has two symmetrically spaced sliding holes, which are arc-shaped and distributed along the front-rear direction of the seat base. The two sets of guide sliders are slidably limited within the two sets of sliding holes and slide in cooperation with them. This sliding cooperation between the sliding holes on the seat base and the guide sliders on the base unit prevents the support frame from bearing the weight of the seat base. Simultaneously, the weight of the seat base is applied to the symmetrically distributed guide sliders on the base unit, ensuring balanced forces on both sides of the seat base and preventing tilting. This stabilizes the center of gravity of the seat base and further enhances the stability when adjusting the pitch angle of the seat unit using a single support frame.

[0014] To prevent the seat unit from detaching from the base unit during pitch adjustment, the guide slider further includes:

[0015] A sliding pin is vertically inserted into the sliding hole and slides in cooperation with the inner wall of the sliding hole;

[0016] A limiting block, connected to a sliding pin, has a width greater than the width of the sliding hole and abuts against the outside of the sliding hole to restrict 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 limiting block, and the sliding pin slides along the wall surface of the sliding hole.

[0017] In order to make the movement of the slider in the sliding hole more smooth, further, the seat unit further comprises a guide rail member arranged at the opening of the sliding hole, the upper surface of the guide rail member is in sliding cooperation with the lower surface of the limiting block, the guide rail member is provided with a first through hole for the sliding pin to pass through, the first through hole is in communication with the sliding hole, the sliding pin passes through the sliding hole and the first through hole in sequence from bottom to top and is fixedly connected with the limiting block at the upper end. When the reclining angle is adjusted, the limiting block can slide along the upper surface of the guide rail member, and the guide rail member plays an auxiliary sliding role.

[0018] In order to further reduce the pressure borne by the support, further, the posture adjusting mechanism comprises:

[0019] Two groups of symmetrically and spacedly arranged gear rails are arranged on the base unit, the gear rails are provided with gear grooves which are arranged along the front and back direction of the seat base, correspondingly, the seat base is connected with a gear adjusting mechanism, the gear adjusting mechanism comprises an acting member for external force to act on and a gear lever which is in transmission cooperation with the acting member, the gear lever is arranged between the two groups of gear rails, the two ends of the gear lever are adapted to the corresponding two groups of gear grooves, the gear lever can be clamped into any corresponding gear groove and can also be separated from the gear groove;

[0020] When the acting member drives the gear lever to separate from a certain corresponding gear groove, the seat unit can adjust the pitch angle of itself relative to the base unit under the sliding cooperation of the first sliding limiting mechanism and the second sliding limiting mechanism; when the acting member drives the gear lever to be clamped into a certain corresponding gear groove, the pitch angle of the seat unit relative to the base unit is locked. The gear rails arranged on the base unit enable the gravity of the seat unit to be supported by the gear rails instead of being directly applied to the support.

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

[0022] In order to improve the comfort of children riding, that is, to realize the adjustment of different orientations of the seat unit, further, the base unit comprises a base, a rotating disc rotatably connected in the base, and a rotating limiting assembly arranged on the base, the seat unit is arranged on the rotating disc, and the rotating limiting assembly can act on the rotating disc to limit the rotating position of the rotating disc. The rotating disc enables the seat unit to be adjusted in rotation relative to the base, and when the seat unit is adjusted to a proper angle, the rotating limiting assembly can limit the rotating disc at the rotating position.

[0023] In order to avoid the occurrence of reclining during the rotation of the seat unit, further, the first connecting piece is fixedly connected to the surface of the rotating disc, and the second connecting piece is connected with the seat back to support the seat back, and part or the whole of the second connecting piece is embedded in the seat back to support the seat back. The first connecting piece is fixedly connected to the surface of the rotating disc, so that the support can rotate synchronously with the rotating disc and the seat unit, and the relative position of the support and the seat unit remains unchanged during the rotation, so that the second connecting piece always supports the seat back during the rotation.

[0024] In order to avoid the disengagement of the rotating disc and the base due to the change of the gravity center position of the seat unit during the rotation, which causes danger, further, the base unit further comprises a limiting pressure ring arranged in a ring shape and fixedly connected to the base, the rotating disc is arranged between the limiting pressure ring and the base, and a limiting portion is formed on the limiting pressure ring, which can be limited with the rotating disc to realize the axial limiting of the rotating disc. The limiting portion of the limiting pressure ring limits the outward movement of the rotating disc in the axial direction.

[0025] Compared with the prior art, the utility model has the advantages that:

[0026] 1. The child safety seat of the utility model makes the seat back slide and limit in the length direction of the seat back relative to the second connecting piece through the first sliding limiting mechanism, and makes the seat base slide and limit in the front-back direction of the seat base on the base unit through the second sliding limiting mechanism, so that the seat back and the seat base can slide and limit in the respective directions, and the occurrence of the reclining of the seat unit during the pitch angle adjustment is avoided.

[0027] 2. The second sliding limiting mechanism in the child safety seat of the utility model is arranged between the base and the seat base, so that the second sliding limiting mechanism replaces the support to bear the weight of the seat base, shares the pressure applied by the seat unit to the support, and further reduces the pressure borne by the support, has the protection effect on the support, prolongs the service life of the support, on the other hand, the design that the second sliding limiting mechanism is arranged between the base and the seat base also reduces the required structural strength of the support, is beneficial to the manufacturer to manufacture the support by using the material with lower structural strength, reduces the production cost of the whole safety seat, and has the advantage of "one thing with two uses". BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure schematic view of the child safety seat of the utility model embodiment;

[0029] Figure 2 It is an explosion view of the structure of the child safety seat of the utility model embodiment;

[0030] Figure 3A sectional view of the child safety seat of the utility model embodiment;

[0031] Figure 4 An assembly relationship schematic view of the seat unit, the support and the gear adjusting mechanism of the utility model embodiment;

[0032] Figure 5 A rear view of the seat unit of the utility model embodiment;

[0033] Figure 6 An exploded view of the posture adjusting mechanism of the utility model embodiment;

[0034] Figure 7 A sectional view of the child safety seat of the utility model embodiment at another depth;

[0035] Figure 8 A partial structure exploded view of the base unit and the seat unit of the utility model embodiment;

[0036] Figure 9 A partial structure schematic view of the base unit of the utility model embodiment;

[0037] Figure 10 A structure schematic view of the limiting pressing ring of the utility model embodiment;

[0038] Figure 11 A structure schematic view of the baffle of the utility model embodiment;

[0039] Figure 12 A Figure 7 A local enlarged view at A;

[0040] Figure 13 A Figure 7 A local enlarged view at B;

[0041] Figure 14 A Figure 7 A local enlarged view at C;

[0042] Figure 15 An assembly relationship schematic view of the rotating disc, the gear rail and the sliding block of the utility model embodiment;

[0043] Figure 16 A structure schematic view of the rotating limiting assembly of the utility model embodiment;

[0044] Figure 17 An assembly relationship schematic view of the base unit and the support of the utility model embodiment;

[0045] Figure 18 A Figure 17 A local enlarged view at the circle. DETAILED DESCRIPTION

[0046] The utility model will be described in further detail below in combination with the drawings.

[0047] As Figures 1-18 shown, it is the best implementation example of the utility model. The child safety seat of this embodiment is mainly used for guaranteeing the safety of children riding. At present, the seat unit of the existing child safety seat is basically set on the base through two symmetrically arranged steel supports. The forward inclination, backward inclination and gear adjusting mechanism of the seat are matched with the support, so that the support is under great pressure and is prone to fatigue after long-term use. Moreover, the two steel supports greatly increase the weight of the child safety seat and increase the installation difficulty of the user. Therefore, it would be beneficial to provide a child safety seat with smaller support load, longer service life and smaller weight support. The detailed structure of the child safety seat will be described below.

[0048] Referring to Figures 1 to 3 , the child safety seat of this embodiment comprises a base unit 1, a seat unit 2 movably arranged on the base unit 1, a posture adjusting mechanism arranged between the seat unit 2 and the base unit 1, and a support 3. The seat unit 2 comprises a seat base 21 and a seat backrest 22 connected to the rear side of the seat base 21. The posture adjusting mechanism is used to adjust the pitch angle of the seat unit 2 relative to the base unit 1. The support 3 has a first connecting piece 31 connected to the base unit 1 and a second connecting piece 32 connected to the rear side of the first connecting piece 31 and extending upwardly and obliquely. The first sliding limiting mechanism is arranged between the second connecting piece 32 and the seat backrest 22, and the second sliding limiting mechanism is arranged between the base unit 1 and the seat base 21. During the adjustment of the pitch angle of the seat unit 2 relative to the base unit 1 by the posture adjusting mechanism, the first sliding limiting mechanism enables the seat backrest 22 to slide and be limited in the length direction of the seat backrest 22 relative to the second connecting piece 32, and the second sliding limiting mechanism enables the seat base 21 to slide and be limited on the base unit 1 in the front-rear direction of the seat base 21. The number of supports 3 is only one. The single-support structure of the child safety seat reduces the overall weight of the safety seat. Moreover, the first sliding limiting mechanism and the second sliding limiting mechanism are respectively used as the backward inclination angle guide structure of the seat backrest and the forward inclination angle guide structure of the seat base, which overcomes the difficulty of pitch angle adjustment of the seat unit by a single support, facilitates transportation and installation, and reduces the production cost of the safety seat.

[0049] Referring to Figure 4The first sliding limiting mechanism comprises a guide sliding rod 321 arranged on the second connecting member 32 in a transverse direction, two groups of symmetrically and spacedly arranged sliding grooves 221 arranged on the rear side of the seat back 22, the length direction of the two groups of sliding grooves 221 is perpendicular to the length direction of the guide sliding rod 321, and the two ends of the guide sliding rod 321 respectively correspond to extend into the two groups of sliding grooves 221 and slide with the two groups of sliding grooves 221. Through the sliding cooperation relationship between the two groups of sliding grooves 221 and the guide sliding rod 321, the seat back 22 can reciprocate in the length direction of the second connecting member 32, and the symmetrically arranged sliding grooves 221 make the lengths of the guide sliding rods 321 on both sides of the second connecting member 32 equal during the sliding process of the seat back 22, so that the seat back 22 is not easy to overturn to one side, the safety of the child during use is increased, the guide sliding rod 321 is also protected, and at the same time, it is possible to adjust the pitch angle of the seat unit 2 by using a single support, which is convenient for the user to adjust the reclining angle. The two ends of the guide sliding rod 321 in the embodiment respectively abut against the groove bottoms of the two groups of sliding grooves 221 when extending into the two groups of sliding grooves 221, so that the sliding grooves 221 limit the circumferential rotation movement of the guide sliding rod 321 relative to the seat back 22, and further limit the circumferential rotation movement of the seat unit 2 relative to the support 3, thereby further increasing the stability of the seat unit 2 during rotation.

[0050] Referring to Figure 3 and Figure 5 The second sliding limiting mechanism comprises two groups of symmetrically and spacedly arranged guide sliding blocks 4 arranged on the base unit 1, and two groups of symmetrically and spacedly arranged sliding holes 211 arranged on the seat base 21, the sliding holes 211 are arranged in an arc shape along the front-rear direction of the seat base 21, and the two groups of guide sliding blocks 4 are respectively arranged in the two groups of sliding holes 211 in a sliding limiting manner and slide with the two groups of sliding holes 211. The sliding cooperation between the sliding holes 211 on the seat base 21 and the guide sliding blocks 4 arranged on the base unit 1 avoids the support 3 from bearing the gravity of the seat base 21, and at the same time, the gravity of the seat base 21 is applied to the guide sliding blocks 4 symmetrically arranged on the base unit 1, so that the left and right sides of the seat base are balanced and do not tilt, the gravity center of the seat base 21 is stable, and the stability of the single support adjusting the pitch angle of the seat unit 2 is further enhanced, which is convenient for the user to adjust the reclining angle.

[0051] The guide sliding block 4 comprises a sliding pin 41 and a limiting block 42 connected with the sliding pin 41, wherein the sliding pin 41 is vertically arranged in the sliding hole 211 and is in sliding fit with the inner wall of the sliding hole 211; the limiting block 42 has a width greater than that of the sliding hole 211 and is arranged outside 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 limiting block 42, and the sliding pin 41 slides along the hole wall surface of the sliding hole 211, thereby avoiding the disengagement of the seat unit 2 from the base unit 1 during the pitch angle adjustment.

[0052] The seat unit 2 further comprises a guide rail 23 arranged at the upper opening of the sliding hole 211, the upper surface of the guide rail 23 is in sliding fit with the lower surface of the limiting block 42, the guide rail 23 is provided with a first through hole 231 for the sliding pin 41 to pass through, the first through hole 231 is in communication with the sliding hole 211, and 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 with the limiting block 42 at the upper end. During the forward inclination angle adjustment, the limiting block 42 can slide along the upper surface of the guide rail 23, and the guide rail 23 plays a role of auxiliary sliding, so that the movement of the guide sliding block 4 in the sliding hole 211 is more smooth.

[0053] Referring to Figure 3 and Figure 5 , the lower surface of the seat base 21 is partially inwardly recessed to form a sliding portion 212, the surface of the sliding portion 212 is in shape fit with 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 fit of the sliding portion 212 with the gear rail 5 plays a role of guiding sliding, thereby increasing the stability of the seat unit 2 during the pitch angle adjustment.

[0054] Referring to Figure 6, the posture adjusting mechanism comprises two groups of gear rails 5 symmetrically and spaced apart arranged on the base unit 1, and a gear adjusting mechanism 6 correspondingly connected to the seat base 21, the gear rails 5 are provided with gear grooves 51 spaced apart along the front and back direction of the seat base 21, the gear adjusting mechanism 6 comprises an acting member 61 for external force application and a gear rod 62 in transmission cooperation with the acting member 61, the gear rod 62 is arranged between the two groups of gear rails 5, and the two ends of the gear rod 62 are adapted to the corresponding two groups of gear grooves 51, the gear rod 62 can be clamped into any corresponding group of gear grooves 51 or can be separated from the group of gear grooves 51; in the state that the acting member 61 drives the gear rod 62 to separate from a certain corresponding gear groove 51, the seat unit 2 can adjust the pitch angle thereof relative to the base unit 1 under the sliding cooperation of the first sliding limiting mechanism and the second sliding limiting mechanism; when the acting member 61 drives the gear rod 62 to be clamped into a certain corresponding gear groove 51, the pitch angle of the seat unit 2 relative to the base unit 1 is locked. The gear rails 5 arranged on the base unit 1 enable the gravity of the seat unit 2 to be supported by the gear rails 5 instead of being directly applied to the support 3, thereby further reducing the pressure borne by the support 3. The user can pull the acting member 61 to make the gear rod 62 separate from the gear groove 51, and the seat unit 2 can slide relative to the support 3, and when the gear rod 62 is released, the gear rod 62 is clamped into the gear groove 51 again.

[0055] In addition, in order to improve the comfort of children, it is necessary to realize the adjustment of different orientations of the seat unit 2, referring to Figure 7 The base unit 1 comprises a base 11, a rotating disc 12 rotatably connected in the base 11, and a rotating limiting assembly 13 arranged on the base 11, the seat unit 2 is arranged on the rotating disc 12, and the rotating limiting assembly 13 can act on the rotating disc 12 to limit the rotating position of the rotating disc 12. The rotating disc 12 enables the seat unit 2 to be adjusted in rotation relative to the base 11, and when the seat unit 2 is adjusted to a proper angle, the rotating limiting assembly 13 can limit the rotating disc 12 at the rotating position.

[0056] Referring to Figures 8 to 9 The base unit 1 further comprises a limiting pressure ring 14 fixedly connected to the base 11 and arranged in a ring shape, the rotating disc 12 is arranged between the limiting pressure ring 14 and the base 11, and a limiting portion 141 is formed on the limiting pressure ring 14 and can be in limiting cooperation with the rotating disc 12 to realize the axial limiting of the rotating disc 12. The limiting portion 141 of the limiting pressure ring 14 limits the outward movement of the rotating disc 12 in the axial direction, thereby avoiding the separation of the rotating disc 12 from the base 11 due to the change of the gravity center position of the seat unit 2 during the rotation, which causes danger.

[0057] Referring to Figure 10The limiting part 141 is a limiting step surface formed by protruding inward in the circumferential direction of the inner ring wall of the limiting pressure ring 14. The inner ring wall of the limiting pressure ring 14 is formed with a recessed part 142 recessed inward in the circumferential direction below the limiting part 141. The outer edge of the rotating disc 12 abuts against the limiting step surface of the limiting part 141 below the limiting part 141, and a gap 143 for the rotating movement of the rotating disc 12 is left between the outer edge of the rotating disc 12 and the recessed part 142. The gap 143 prevents the rotating disc 12 from rubbing against the limiting pressure ring 14 during the rotating movement, and the rotating disc 12 rotates smoothly, which is convenient for the user to adjust the seat unit 2.

[0058] Referring to Figure 8 and Figure 9 , the rotating disc 12 and the limiting pressure ring 14 are provided with a baffle 16. The baffle 16 has a structural strength greater than that of the limiting pressure ring 14, and is located inside the inner ring wall of the limiting pressure ring 14. The baffle 16 is located inside the inner ring wall of the limiting pressure ring 14, which can prevent the rotating disc 12 from directly rubbing against the limiting pressure ring 14 and directly impacting the limiting pressure ring 14, prolonging the service life of the limiting pressure ring 14 and enhancing the impact bearing capacity of the limiting pressure ring 14.

[0059] Referring to Figures 9 to 12 , the recessed part 142 of the limiting pressure ring 14 is formed with a baffle groove 144 recessed inward for mounting the baffle 16. The baffle 16 is arranged in the baffle groove 144. The baffle 16 includes a connecting part 161 and an L-shaped bent part 162. The connecting part 161 is provided with a connecting hole 1611. The limiting pressure ring 14 is arranged on the base 11 by a fastener 17. The fastener 17 passes through the connecting hole 1611 of the connecting part 161 and connects the baffle 16 and the limiting pressure ring 14, which improves the stability of the connection between the baffle 16 and the limiting pressure ring 14. The L-shaped bent part 162 is connected to one side of the connecting part 161. The top of the L-shaped bent part 162 abuts against the lower surface of the limiting part 141. The L-shaped bent part 162 can prevent the rotating disc 12 from axially impacting the limiting part 141, thereby protecting the limiting part 141 and enhancing the impact bearing capacity of the limiting part 141.

[0060] Referring to Figure 8 and Figure 15 , the base 11 is provided with a through hole 111. The rotating disc 12 is provided with a rotating shaft 121 protruding axially at the center. The rotating shaft 121 is adapted to the through hole 111 and passes through the through hole 111. The rotating disc 12 is rotatably connected to the base 11 by the rotating shaft 121. The central axis of the rotating shaft 121 is the rotating axis a. The rotating connection of the rotating shaft 121 and the through hole 111 enables the rotating disc 12 to stably rotate around the rotating axis a, which improves the rotating stability of the rotating disc 12.

[0061] Referring toFigure 13 and Figure 15 The rotating shaft 121 is axially provided with a mounting hole 1211, and the connecting piece 15 is axially arranged through the mounting hole 1211 to axially limit and connect the rotating shaft 121 and the base 11. The arrangement of the connecting piece 15 can avoid the axial disengagement of the rotating disc 12 and the base 11, increase the stability of the connection between the rotating disc 12 and the base 11, and improve the safety of the children.

[0062] Referring to Figure 9 , Figure 10 , Figure 14 , Figure 15 and Figure 16 The outer edge of the rotating disc 12 is partially and circumferentially recessed inwardly to form a clamping groove 122, and four clamping grooves are uniformly arranged on the side of the rotating disc 12. The rotating limiting assembly 13 comprises a clamping pin 131 and a compression spring 132. The clamping pin 131 is arranged on the base 11 in the radial direction of the rotating disc 12, and is provided with a clamping pin 1311 and a handle 1312 exposed on the outer surface of the base 11. The clamping pin 131 is adapted to and arranged opposite to the clamping groove 122, and the limiting compression ring 14 is provided with a gap 145 for the clamping pin 131 to enter the clamping groove 122. The compression spring 132 is arranged between the base 11 and the clamping pin 131, and has a tendency to radially press the clamping pin 131 inwardly in the radial direction of the rotating disc 12. The user can unlock the rotating position of the rotating disc 12 by radially pressing the clamping pin 131, and can also reset the rotating position of the rotating disc 12 by loosening the clamping pin 131 to make the compression spring 132 rebound and push the clamping pin 131 to reset, which facilitates the user to adjust the rotating position of the rotating disc 12 multiple times. The base 11 is provided with radially distributed sliding holes 112, and the clamping pin 131 is partially protruded downwardly and connected with a sliding piece 133. The sliding piece 133 is in sliding cooperation with the sliding hole 112, which facilitates the reciprocating movement of the clamping pin 131 in the radial direction.

[0063] Referring to Figure 7 The first connecting piece 31 is fixedly connected to the surface of the rotating disc 12, and the second connecting piece 32 is connected to the seat back 22 to support the seat back 22. Part or all of the second connecting piece 32 is embedded in the seat back 22 to support the seat back 22. The fixed connection of the first connecting piece 31 to the surface of the rotating disc 12 enables the support 3 to rotate synchronously with the rotating disc 12 and the seat unit 2, and the relative position of the support 3 and the seat unit 2 remains unchanged during rotation, so that the second connecting piece 32 always supports the seat back 22 during rotation, avoiding the occurrence of backward inclination during the rotation of the seat unit 2.

[0064] Referring to Figure 4 and Figure 7The rear side of the seat back 22 is concavely provided with an embedding groove 222 for embedding the second connecting piece 32, and the groove bottom of the embedding groove 222 is in contact with the second connecting piece 32. The embedding groove 222 facilitates the positioning and installation of the support 3 by the manufacturer, and the contact between the groove bottom of the embedding groove 222 and the second connecting piece 32 enables the support 3 to bear the pressure of the seat back 22 and the child in the backward direction, while the embedding of the second connecting piece 32 in the embedding groove 222 also limits the circumferential rotation between the seat back 22 and the second connecting piece 32, so that the seat unit 2 can remain stationary relative to the support 3 in the rotating state, thereby enabling the support 3 to always have a supporting effect on the seat back 22 during rotation adjustment, further increasing the stability of the seat unit 2 during rotation. The inclination angle of the second connecting piece 32 is the same as that of the seat back 22. This technical solution enables the second connecting piece 32 and the seat back 22 to be arranged in parallel with each other, preventing interference between the seat back 22 and the second connecting piece 32 during assembly and rotation, thereby preventing wear of the seat back 22 and prolonging the service life of the seat back 22.

[0065] The rear side of the seat back 22 is provided with a front-rear inclined sliding groove 221, and the second connecting piece 32 is provided with a connecting rod 43 that is in sliding cooperation with the sliding groove 221. The cooperation between the connecting rod 43 and the sliding groove 221 enables the seat back 22 to be adjusted in the backward inclination angle relative to the support 3, and the cooperation between the connecting rod 43 and the sliding groove 221 also shares the pressure of the seat back 22 and the child in the backward direction during sliding, further enhancing the stability and facilitating the user to adjust the pitch angle of the seat unit 2.

[0066] Referring to Figure 17 The base 11 is an L-shaped base with a base back 18, and the second connecting piece 32 and the front side of the base back 18 are provided with a connecting structure 7. The connecting structure 7 enhances the connection between the base 11 and the second connecting piece 32, enabling the base back 18 to share the pressure received by the second connecting piece 32; at the same time, since the second connecting piece 32 is connected to the seat back 22, the connecting structure 7 also indirectly connects the base back 18 to the seat back 22, avoiding the separation of the base 11 and the seat unit 2 due to the forward inclination of the seat unit 2 in a certain posture, further enhancing the load-bearing capacity of the support 3 and improving the safety of the child riding, having the advantage of "one thing with two uses".

[0067] Referring to Figure 18The connecting structure 7 comprises a first connecting hook 71 and a second connecting hook 72. The first connecting hook 71 is fixedly arranged on the front side of the seat back 18, and the second connecting hook 72 is fixedly arranged on the upper end of the second connecting piece 32, is limitedly connected with the first connecting hook 71 in the front-rear direction, and is movably arranged with the first connecting hook 71 in the rotation direction of the rotating disc 12. Thus, in the state that the support 3 rotates relative to the base 11, the first connecting hook 71 and the second connecting hook 72 can be relatively disengaged. In the forward posture of the seat unit 2, the first connecting hook 71 and the second connecting hook 72 are limitedly connected in the front-rear direction to prevent forward inclination. In the state that the seat unit 2 rotates relative to the base 11, the first connecting hook 71 and the second connecting hook 72 are disengaged from each other, so that the rotation movement of the seat unit 2 is not limited by the connecting structure 7, and the connecting structure 7 can adapt to the rotation movement of the seat unit 2 relative to the base 11.

[0068] The first connecting hook 71 is formed with a first through slot 710 on both sides perpendicular to the rotation direction, and the second connecting hook 72 is formed with a second through slot 720 on both sides perpendicular to the rotation direction. The front side of the seat back 18 is recessed with an avoiding groove 181 corresponding to the second connecting hook 72, and the avoiding groove 181 is used for avoiding the rotation movement of the second connecting hook 72 relative to the base 11. The design of the avoiding groove 181 can avoid the interference between the second connecting hook 72 and the seat back 18 during the rotation adjustment, and facilitates the user to rotate and adjust the seat unit 2.

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

[0070] 1) Rotation adjustment: the user pulls the handle 1312 forward, the catch pin 1311 is disengaged from the catch groove 122, the compression spring 132 is compressed under the force, the user applies force to the seat unit 2 for rotation adjustment, and the first connecting hook 71 and the second connecting hook 72 are disengaged. When the user rotates the seat unit 2 to an appropriate angle, the handle 1312 is released, the catch pin 1311 is re-engaged into the catch groove 122, and the rotation adjustment is completed. During the rotation, the seat unit 2 and the support 3 are synchronously rotated, so that the support 3 supports the seat back 22 during the rotation, to avoid the outward inclination of the seat unit 2 during the rotation.

[0071] 2) Pitch angle adjustment: the user pulls the action piece 61 forward, the gear lever 62 is disengaged from the gear slot 51, so that the seat unit 2 can slide relative to the support 3, then the user keeps the action piece 61 forward, and pulls or pushes the seat unit 2 and the action piece 61 forward or backward to adjust the pitch angle, during the adjustment process, the sliding groove 211 slides along the guide sliding rod 321, so that the reclining angle of the seat back 22 changes, the guide sliding block 4 slides along the guide rail 32 and the sliding hole 211, so that the reclining angle of the seat base 21 changes; after sliding to the appropriate angle, the user releases the action piece 61, the gear lever 62 is re-engaged into the gear slot 51, and the pitch angle adjustment is completed; during the adjustment process, the support 3 only bears the pressure of the seat back 22 and the child's back on the second connecting piece 32, while the pressure of the seat base 21 and the child's lower hip area is transmitted to the base 11 through the gear rail 5 to bear the pressure, reducing the pressure on the support 3 and prolonging the service life of the child safety seat;

[0072] In addition, since the support 3 bears less weight, the pitch angle adjustment of the child safety seat of the present embodiment can be designed as a single support structure, and the symmetrically distributed sliding groove 221, guide sliding block 4, gear rail 5, guide rail 23, sliding hole 211 and sliding part 212 ensure the stability of the movement of the seat unit 2 during the pitch angle adjustment, avoiding the phenomenon of the seat unit 2 tilting to one side after the gear lever 62 is disengaged from the gear slot 51.

Claims

1. A child safety seat comprising: a base unit (1); a seat unit (2) movably arranged 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 adjusting mechanism arranged between the seat unit (2) and the base unit (1) for adjusting the pitch angle of the seat unit (2) relative to the base unit (1); characterized in that it further comprises a support (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 and obliquely, a first sliding limiting mechanism being arranged between the second connecting member (32) and the seat back (22), and a second sliding limiting mechanism being arranged between the base unit (1) and the seat base (21); during the adjustment of the pitch angle of the seat unit (2) relative to the base unit (1) by the posture adjusting mechanism, the first sliding limiting mechanism enables the seat back (22) to slide and be limited in the length direction of the seat back (22) relative to the second connecting member (32), and the second sliding limiting mechanism enables the seat base (21) to slide and be limited in the front-rear direction of the seat base (21) on the base unit (1).

2. The child safety seat of claim 1, wherein: The first sliding limiting mechanism comprises: a guide slide rod (321) arranged on the second connecting member (32), the guide slide rod (321) being arranged transversely; two groups of symmetrical and spaced slide grooves (221) arranged on the rear side of the seat back (22), the length direction of the two groups of slide grooves (221) being perpendicular to the length direction of the guide slide rod (321), and the two ends of the guide slide rod (321) respectively corresponding to extend into the two groups of slide grooves (221) and slide with the two groups of slide grooves (221).

3. A child safety seat according to claim 1 or 2, characterised in that, The second sliding limiting mechanism comprises: two groups of symmetrical and spaced guide slide blocks (4) arranged on the base unit (1), and two groups of symmetrical and spaced slide holes (211) arranged on the seat base (21), the slide holes (211) being arranged in an arc shape along the front-rear direction of the seat base (21), and the two groups of guide slide blocks (4) being respectively arranged in the two groups of slide holes (211) and slide with the two groups of slide holes (211).

4. The child safety seat of claim 3, wherein, The guide slide block (4) comprises: a slide pin (41) vertically penetrating into the slide hole (211) and slide with the inner wall of the slide hole (211); a limiting block (42) connected to the slide pin (41), the width of the limiting block (42) being greater than the width of the slide hole (211), and the limiting block (42) being arranged outside the slide hole (211) to limit the upward movement of the seat unit (2) relative to the base (11).

5. The child safety seat of claim 4, wherein, The seat unit (2) further comprises a guide rail (23) arranged at the opening of the sliding hole (211), the upper surface of the guide rail (23) is in sliding cooperation with the lower surface of the limiting block (42), the guide rail (23) is provided with a first through hole (231) for the sliding pin (41) to pass through, the first through hole (231) is in communication with the sliding hole (211), the sliding pin (41) passes through the sliding hole (211) and the first through hole (231) from bottom to top in sequence and is fixedly connected with the limiting block (42) at the upper end.

6. The child safety seat of claim 1, wherein: The posture adjusting mechanism comprises: Two groups of gear rails (5) are symmetrically and spacedly arranged on the base unit (1), the gear rails (5) are provided with gear grooves (51) which are spacedly arranged along the front and back direction of the seat base (21), correspondingly, the seat base (21) is connected with a gear adjusting mechanism (6), the gear adjusting mechanism (6) comprises an acting member (61) for external force and a gear lever (62) which is in transmission cooperation with the acting member (61), the gear lever (62) is arranged between the two groups of gear rails (5), the two ends of the gear lever (62) are adapted to the corresponding two groups of gear grooves (51), the gear lever (62) can be clamped into any corresponding gear groove (51) and can also be separated from the gear groove (51). When the acting member (61) drives the gear lever (62) to separate from a certain corresponding gear groove (51), the seat unit (2) can adjust the pitch angle relative to the base unit (1) under the sliding cooperation of the first sliding limiting mechanism and the second sliding limiting mechanism; when the acting member (61) drives the gear lever (62) to be clamped into a certain corresponding gear groove (51), the pitch angle of the seat unit (2) relative to the base unit (1) is locked.

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

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

9. The child safety seat of claim 8, wherein: The first connecting member (31) is fixedly connected to the surface of the rotating disc (12), and the second connecting member (32) is connected with the seat back (22) to support the seat back (22), 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 disc (12), and the second connecting member (32) is connected with the seat back (22) to support the seat back (22), 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 of claim 8, wherein: The base unit (1) further comprises a limiting pressing ring (14) fixedly connected to the base (11) and arranged in a ring shape, the rotating disc (12) is arranged between the limiting pressing ring (14) and the base (11), and a limiting portion (141) is formed on the limiting pressing ring (14), which can be limitedly matched with the rotating disc (12) to realize axial limiting of the rotating disc (12).

Images