Seat plate adjusting system, child safety seat and ISOFIX safety unlocking system

Abstract

The utility model relates to a seat plate adjusting system for a child safety seat, the child safety seat and an ISOFIX safety unlocking system for the child safety seat. The seat plate adjusting system comprises a seat plate, a first connecting part and a second connecting part, wherein the seat plate is provided with at least one first connecting part; and the base is provided with at least one second connecting part matched with the at least one first connecting part, and the seat plate is slidably connected to the base through the matching of the first connecting part and the second connecting part. The seat plate is further provided with a first adjusting part, the base is further provided with a second adjusting part and a third adjusting part, the first adjusting part is matched with the second adjusting part so that the seat plate can be locked at the first position, and the first adjusting part is matched with the third adjusting part so that the seat plate can be locked at the second position. The seat plate can slide between a first position and a second position relative to the base in a locking mode, and the seat length of the child safety seat when the seat plate is located at the first position is smaller than the seat length of the child safety seat when the seat plate is located at the second position.

Description

Technical Field

[0001] The present application relates to the technical field of child safety seats, and in particular to a seat adjustment system, a child safety seat and an ISOFIX safety release system. Background Art

[0002] In order to facilitate use and extend the service life, child safety seats are usually designed to be suitable for children of a certain age group. However, most of the current child safety seats have a fixed seat length, which is difficult to adapt to children of various body shapes, thus reducing the comfort of child safety seats.

[0003] In the event of a traffic accident, the backrest of the child safety seat may be pressed forward. At this time, the parts of the backrest on both sides that are in contact with the base (for example, the armrests on the base) (for example, the wings of the backrest) will deform outward in the lateral direction under pressure, that is, the two sides of the backrest will spread outward, so that the base can no longer support the two sides of the backrest, causing the backrest to continue to be pressed forward.

[0004] The ISOFIX fixing system is an internationally used connection system for child safety seats. Generally, the ISOFIX fixing system includes an ISOFIX connector provided on the child safety seat and an ISOFIX interface provided on the vehicle seat. The connection and disassembly of the two are very convenient, which brings great convenience to users.

[0005] However, due to the easy disassembly of the ISOFIX fixing system, there is a safety hazard that the ISOFIX fixing system is prone to accidental unlocking. In particular, in order to facilitate the user to operate the ISOFIX fixing system, the unlocking mechanism is generally set at an easily accessible position on the child safety seat, which further increases the possibility of accidental unlocking due to accidental touch. For example, the ISOFIX fixing system may be accidentally unlocked due to the accidental touch of the child in the child safety seat. Summary of the invention

[0006] Based on this, it is necessary to provide a seat adjustment system, an ISOFIX safety release system and a child safety seat to address the above technical issues. The seat adjustment system and the child safety seat can adjust the seat length of the child safety seat in a simple way to meet the use needs of children of different body shapes. The ISOFIX safety release system and the child safety seat can, on the one hand, retain the easy disassembly of the ISOFIX fixing system, and on the other hand, prevent accidental release caused by mis-touch.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an embodiment of the present application provides a seat plate adjustment system for a child safety seat, the seat plate adjustment system comprising: a seat plate, the seat plate is provided with at least one first connection part; and a base, the base is provided with at least one second connection part that cooperates with at least one first connection part, and the seat plate is slidably connected to the base through the cooperation of the first connection part and the second connection part. The seat plate is also provided with a first adjustment part, and the base is also provided with a second adjustment part and a third adjustment part, the first adjustment part cooperates with the second adjustment part so that the seat plate is locked in the first position, and the first adjustment part cooperates with the third adjustment part so that the seat plate is locked in the second position. The seat plate can be locked and slid relative to the base between a first position and a second position. When the seat plate is in the first position, the seat length of the child safety seat is smaller than the seat length of the child safety seat when the seat plate is in the second position. The first connecting part is a connecting column, which is fixedly arranged on the side of the seat plate facing the base. The second connecting part is a first connecting groove, which is arranged on the side of the base facing the seat plate, and the first connecting groove passes through the side of the base facing the seat plate. The first connecting groove extends in the front-to-back direction of the base. The connecting column is inserted into the first connecting groove so that it can slide back and forth along the length direction of the first connecting groove. A first stopper is arranged at one end of the connecting column away from the seat plate. The first stopper is detachably fixed to one end of the connecting column away from the seat plate, and the size of the first stopper is set so that it cannot pass through the first connecting groove.

[0008] In one embodiment, a first elastic member is disposed around the connecting column, one end of the first elastic member abuts against the back of the side of the base facing the seat plate, and the other end of the first elastic member abuts against the first stopper. The first elastic member biases the connecting column toward the direction away from the seat plate through the first stopper, the first adjustment portion is an adjustment column, and the adjustment column is fixedly disposed on the side of the seat plate facing the base, the second adjustment portion is a first adjustment hole, and the third adjustment portion is a second adjustment hole. The position of the first adjustment hole is set so that when the seat plate slides to the first position, the adjustment column can be inserted into the first adjustment hole so that the seat plate is fixed in the first position; when the seat plate is lifted upward, the adjustment column is disengaged from the first adjustment hole so that the seat plate is released from the first position, and the position of the second adjustment hole is set so that when the seat plate slides to the second position, the adjustment column can be inserted into the second adjustment hole so that the seat plate is fixed in the second position; when the seat plate is lifted upward, the adjustment column is disengaged from the second adjustment hole so that the seat plate is released from the second position, and the length of the first adjustment portion is shorter than the length of the first connecting portion. A first recess is formed on the front end of the base toward the seat plate. The first recess is formed by the side of the base facing the seat plate being recessed in a direction away from the seat plate. The first recess forms an operating space between the front end of the seat plate and the front end of the base.

[0009] According to another aspect of the present application, an embodiment of the present application provides a seat adjustment system for a child safety seat, the seat adjustment system comprising: a seat, the seat is provided with at least one first connection portion; and a base, the base is provided with at least one second connection portion that cooperates with the at least one first connection portion, and the seat is slidably connected to the base through the cooperation of the first connection portion and the second connection portion. The seat is also provided with a first adjustment portion, and the base is also provided with a second adjustment portion and a third adjustment portion, the first adjustment portion cooperates with the second adjustment portion so that the seat is locked in the first position, and the first adjustment portion cooperates with the third adjustment portion so that the seat is locked in the second position. The seat plate can be locked and slid relative to the base between a first position and a second position. When the seat plate is in the first position, the seat length of the child safety seat is smaller than the seat length of the child safety seat when the seat plate is in the second position. The first connecting portion is a convex strip, which is fixedly arranged on a side of the seat plate facing the base, and the convex strip extends in the front-to-back direction of the seat plate. The second connecting portion is a second connecting groove, which is arranged on a side of the base facing the seat plate, and the second connecting groove is recessed in a direction away from the seat plate. The second connecting groove extends in the front-to-back direction of the base, and the convex strip is embedded in the second connecting groove. The convex strip is slidable along the second connecting groove, and the seat plate slides in the front-to-back direction of the base by sliding the convex strip in the second connecting groove.

[0010] In one embodiment, a first accommodating space is defined inside the seat plate, and the first adjustment portion is at least partially disposed in the first accommodating space. The first adjustment portion includes: an operating member that can slide between a locking position and an adjustment position; and a first engaging member that is operably connected to the operating member. The first engaging member is capable of sliding between an extended position and a retracted position, and the first engaging member is adapted to engage with the second adjusting portion and the third adjusting portion. When the seat plate is in the first position, the operating member is slid to the locking position, so that the first engaging member slides to the extended position, the first engaging member engages with the second adjusting portion, and the seat plate is fixed to the first position; the operating member is slid to the adjustment position, so that the first engaging member slides to the retracted position, the first engaging member disengages from the second adjusting portion, and the seat plate is released from the first position; when the seat plate is in the second position, the operating member is slid to the locking position, so that the first engaging member slides to the extended position, the first engaging member engages with the third adjusting portion, and the seat plate is fixed to the second position; the operating member is slid to the adjustment position, so that the first engaging member slides to the retracted position, the first engaging member disengages from the third adjusting portion, and the seat plate is released from the second position. A limiting groove is provided on the operating member, and a limiting protrusion cooperating with the limiting groove is provided in the first accommodating space, the limiting groove extends in the front-rear direction of the base, the cooperation between the limiting groove and the limiting protrusion at least limits the first limit position of the operating member, the first limit position corresponds to the locking position of the operating member, the cooperation between the limiting groove and the limiting protrusion also limits the second limit position of the operating member, the second limit position corresponds to the adjustment position of the operating member, the first adjustment part also includes a first connecting member, one end of the first connecting member is fixedly connected to the operating member, the other end of the first connecting member is fixedly connected to the first engaging member, the first connecting member is a flexible connecting strip, and the first connecting member is integrated with the operating member.

[0011] According to another aspect of the present application, an embodiment of the present application provides a child safety seat, comprising: a base; and a backrest, the backrest is detachably connected to the base, the base comprises a snap-fit ​​groove, the backrest comprises a snap-fit ​​portion, and the snap-fit ​​portion is snap-fitted into the snap-fit ​​groove. The base also comprises a connecting rod, the connecting rod is arranged at the rear end of the base, the backrest comprises a hook portion, the hook portion hooks the connecting rod to engage with the connecting rod, the snap-fit ​​portion comprises a locking tongue, the locking tongue can slide in the front-to-back direction to switch between a locked position and a released position, in the locked position, the locking tongue slides into the snap-fit ​​groove to be snap-fitted into the snap-fit ​​groove, in the released position, the locking tongue slides in a direction away from the snap-fit ​​groove to be disengaged from the snap-fit ​​groove and released from the snap-fit ​​groove, the snap-fit ​​portion also comprises a fourth elastic member, and the fourth elastic member makes the locking tongue have a tendency to slide toward the snap-fit ​​groove.

[0012] In one embodiment, the base includes a connecting rod, which is arranged at the rear end of the base, and the backrest includes a hook portion, which hooks the connecting rod to engage with the connecting rod. The base also includes a reinforcing tube, which is arranged in the connecting rod.

[0013] According to another aspect of the present application, an embodiment of the present application provides a seat adjustment system for a child safety seat, comprising a seat and a base, wherein the seat can move between a first position and a second position relative to the base along a first direction. The seat also includes: an adjustment portion, which can operably limit the seat relative to the base to move along the first direction; a connection portion, which limits the seat relative to the base to move along the second direction, the second direction being perpendicular to the first direction; and a first through hole, which is used to pass through a crotch strap. The base includes a second through hole, which is used to pass through a crotch strap, when the seat is in the first position, the projection of the second through hole in the vertical direction does not coincide with the projection of the first through hole in the vertical direction, and the length of the crotch strap passing through the first through hole is a first length; when the seat is in the second position, at least a portion of the projection of the second through hole in the vertical direction coincides with the projection of the first through hole in the vertical direction, and the length of the crotch strap passing through the first through hole is a second length, and the first length is less than the second length. A gap is formed between a side of the front end of the base facing the seat and a side of the front end of the seat facing the base, and the gap is suitable for the crotch strap to pass through.

[0014] According to another aspect of the present application, an embodiment of the present application provides a child safety seat, comprising: a base, which is provided with an armrest; and a backrest. A first surface is provided on the side of the armrest facing the backrest, and a second surface is provided on the side of the backrest facing the armrest. The first surface and the second surface are arranged opposite to each other. A limiting mechanism is provided on at least one of the first surface and the second surface. The limiting mechanism is configured to provide resistance to hinder the second surface from sliding laterally relative to the first surface when the first surface contacts the second surface. The backrest is provided with a wing portion, and the second surface is arranged at the wing portion. There is a gap between the wing portion and the armrest, and the first surface and the second surface are respectively located on both sides of the gap. The limiting mechanism includes: a positioning recess, which is arranged on one of the first surface and the second surface; and a first positioning protrusion, which is arranged on the other of the first surface and the second surface. When the wing portion contacts the armrest, the first positioning protrusion is inserted into the positioning recess to limit the wing portion from moving laterally relative to the armrest. The width of the positioning recess in the lateral direction is greater than the width of the first positioning protrusion in the lateral direction. When the first positioning protrusion is inserted into the positioning recess, the first positioning protrusion is matched with the positioning recess gap.

[0015] According to another aspect of the present application, an embodiment of the present application provides an ISOFIX safety release system for a child safety seat. The ISOFIX safety release system includes: an ISOFIX connector, which can be switched between a locked state and a released state; a first release device, which is operably connected to the ISOFIX connector; the first release device includes a first release operating part, which can slide between a locked position and a released position, and when the first release operating part switches from the locked position to the released position, the first release device switches the ISOFIX connector from a locked state to a released state; and a second release device, which is operably connected to the first release device; the second release device includes a second release operating part, which can slide between a safety position and a free position, and when the second release operating part is in the safety position, the second release device locks the first release operating part in the locked position. The first release device includes a first engagement part and a second engagement part connected to the first release operating part. The second release device has a third engaging portion. When the first release operating portion is in the locked position and the second release operating portion is in the safety position, the third engaging portion cooperates with the first engaging portion to lock the first release operating portion in the locked position. When the first release operating portion is in the unlocked position and the second release device is in the free position, the third engaging portion cooperates with the second engaging portion to lock the first release operating portion in the unlocked position. The sliding direction of the first release operating portion is not parallel to the sliding direction of the second release operating portion.

[0016] In one embodiment, the sliding direction of the first unlocking operation part is perpendicular to the sliding direction of the second unlocking operation part, and the first unlocking operation part slides from the locked position to the unlocked position in a direction away from the second unlocking operation part. The first unlocking operation part includes a first pressing part for pushing the first unlocking operation part to slide, and when the second unlocking operation part is in the safety position, the side wall of the second unlocking operation part covers at least a part of the first pressing part; when the second unlocking operation part is in the free position, the side wall of the second unlocking operation part is separated from the first pressing part, so that the first pressing part is exposed to the outside.

[0017] In one embodiment, the second release device has a limiting space, which is arranged between the third engaging portion and the second release operating portion. When the second release operating portion is in the safety position, a portion of the first release operating portion enters the limiting space so that the third engaging portion cooperates with the first engaging portion. When the second release operating portion is in the free position, the portion of the first release operating portion is disengaged from the limiting space. The third engaging portion has a beveled surface, and the second engaging portion is provided with a step surface. When the second release device is in the free position and the first release operating portion is in the release position, the beveled surface abuts against the step surface. Under the action of the fifth elastic member, the third engaging portion limits the movement of the first release operating portion in the direction close to the second release device, thereby locking the first release operating portion in the release position.

[0018] In one embodiment, the first release device further includes a first driving member, the first driving member is pivotally arranged on the child safety seat, and the ISOFIX connector is operably connected to the first release operating part through the first driving member. The first driving member includes a pivot shaft arranged on the child safety seat and a first arm and a second arm located on both sides of the pivot shaft, the first arm is operably matched with the first release operating part, the second arm is operably matched with the ISOFIX connector, the length of the first arm is greater than the length of the second arm, and the ISOFIX safety release system further includes a second connecting member, one end of the second connecting member is fixedly connected to the second arm, the other end of the second connecting member is fixedly connected to the ISOFIX connector, the second arm is operably connected to the ISOFIX connector through the second connecting member, and the second connecting member is a flexible connecting member. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other purposes, features and advantages of the present application will become clearer through a more specific description of the preferred embodiments of the present application shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the drawings are not deliberately scaled to the actual size, and the focus is on illustrating the subject matter of the present application.

[0020] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 is a perspective schematic diagram of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a first position;

[0022] Figure 2 is a schematic side view of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a first position;

[0023] Figure 3 is a schematic side view of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a second position;

[0024] Figure 4A It is a schematic structural diagram of a seat plate according to an embodiment of the present application.

[0025] Figure 4B It is a schematic structural diagram of a seat plate according to an embodiment of the present application.

[0026] Figure 5 is a perspective schematic diagram of a child safety seat according to an embodiment of the present application, wherein the seat plate is omitted;

[0027] Figure 6 is a schematic top view of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a second position;

[0028] Figure 7 Along Figure 6 Sectional view along the midline BB;

[0029] Figure 8 Along Figure 6 Sectional view along line AA;

[0030] Fig. 9 is a perspective schematic diagram of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a second position;

[0031] Fig.10 is a schematic side view of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a second position;

[0032] Fig.11 is a schematic side view of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a first position;

[0033] Fig.12 is a structural schematic diagram of a seat plate according to an embodiment of the present application;

[0034] Fig.13 is a perspective schematic diagram of a child safety seat according to an embodiment of the present application, wherein the seat plate is omitted;

[0035] Fig.14 is a schematic structural diagram of a seat plate according to an embodiment of the present application, wherein a side of the seat plate away from the base is removed;

[0036] Fig.15 It is along Fig.13 A schematic cross-sectional view of the center CC line, in which the backrest structure is partially omitted;

[0037] Fig.16A It is along Fig.13 A schematic cross-sectional view of the middle DD line, in which the backrest structure is partially omitted;

[0038] Fig. 16B yes Fig.16A An enlarged schematic diagram of the middle seat belt section;

[0039] Fig.17A yes Fig.16A Schematic diagram of the seat plate shown in sliding into the second position;

[0040] Fig. 17B yes Fig.17A An enlarged schematic diagram of the middle seat belt section;

[0041] Fig.18 is a partially exploded schematic diagram of a child safety seat according to an embodiment of the present application;

[0042] Fig.19 is a schematic side view of a child safety seat according to an embodiment of the present application;

[0043] Fig. 20 is a structural schematic diagram of a seat plate and a base of a child safety seat according to an embodiment of the present application;

[0044] Fig.21 is a perspective view of a child safety seat according to one embodiment of the present application;

[0045] Fig. 22 yes Fig.21 A side view of the child safety seat shown;

[0046] Fig.23 yes Fig. 22 An enlarged view of the middle E section;

[0047] Fig.24 is a base of a child safety seat according to an embodiment of the present application;

[0048] Fig.25 is based on Fig.24 The backrest of the child safety seat of the illustrated embodiment;

[0049] Fig.26 is a base of a child safety seat according to an embodiment of the present application;

[0050] Fig. 27 is based on Fig.26 The backrest of the child safety seat of the illustrated embodiment;

[0051] Fig.28 is a base of a child safety seat according to an embodiment of the present application;

[0052] Fig.29 is based on Fig.28 The backrest of the child safety seat of the illustrated embodiment;

[0053] Fig.30 is a base of a child safety seat according to an embodiment of the present application;

[0054] Fig.31 is based on Fig.30 The backrest of the child safety seat of the illustrated embodiment;

[0055] Fig.32 is a three-dimensional diagram of a child safety seat according to an embodiment of the present application, wherein the first unlocking operating part is in a locked position and the second unlocking operating part is in a safe position;

[0056] Fig.33 yes Fig.32 A partial enlarged view of the middle area F;

[0057] Fig.34 is along Fig.32 Sectional view of the mid-GG line;

[0058] Fig.35 yes Fig.34 A partial enlarged view of the middle area H;

[0059] Fig.36 is a three-dimensional schematic diagram of a child safety seat according to an embodiment of the present application, wherein the first unlocking operating part is in a locked position and the second unlocking operating part is in a free position;

[0060] Fig.37 yes Fig.36 A partial enlarged view of the middle area I;

[0061] Fig.38 is along Fig.36 Bottom view of the section view along the JJ line;

[0062] Fig.39 yes Fig.38 A partial enlarged view of the middle area K;

[0063] Fig.40 is a three-dimensional schematic diagram of a child safety seat according to an embodiment of the present application, wherein the first unlocking operating part is in a unlocking position, and the second unlocking operating part is in a free position;

[0064] Fig.41 yes Fig.40 A partial enlarged view of the middle area L;

[0065] Fig.42 is along Fig.40 Sectional view of the mid-MM line;

[0066] Fig.43 yes Fig.42 A partial enlarged view of the middle area N;

[0067] Fig.44 is a partial exploded view of a child safety seat according to an embodiment of the present application;

[0068] Fig.45 yes Fig.44 Exploded perspective view of the ISOFIX connector;

[0069] Fig.46 is a perspective view of an ISOFIX safety release system according to an embodiment of the present application;

[0070] Fig.47 is along Fig.46A cross-sectional view taken along line OO, wherein the first unlocking operating portion is in a locked position;

[0071] Fig.48 is along Fig.46 Cross-sectional view of the PP line with the ISOFIX connector in the locked state;

[0072] Fig.49 is along Fig.46 A cross-sectional view along line OO, wherein the first unlocking operating portion is in the unlocking position; and

[0073] Fig.50 is along Fig.46 Cross-sectional view of the PP line with the ISOFIX connector in the unlocked state.

[0074] Reference numerals list

[0075] 1 child safety seat, 10 seat adjustment system, 20 backrest

[0076] 100 seat plate, 101 first connecting portion, 102 first adjusting portion, 103, 103' first through hole, 104 third recess, 105 fourth through hole

[0077] 110 base, 111 second connecting portion, 112 second adjusting portion, 113 third adjusting portion, 114 second through hole, 115 receiving groove, 116 first recess, 117 fourth recess, 118 locking member

[0078] 120 Clearance

[0079] 1011 first stopper, 1012 first elastic member, 1013 screw

[0080] 200 seat plate, 201 first connecting portion, 202 first adjusting portion

[0081] 210 base, 211 second connecting portion, 212 second adjusting portion, 213 third adjusting portion

[0082] 220 lower plate, 230 first accommodation space, 240 second accommodation space, 250 upper plate

[0083] 2001 first through hole, 2011 second stopper, 2021 operating member, 2022 first connecting member, 2023 first engaging member, 2024 third elastic member, 2101 second through hole, 2102 first recess, 2111 through groove, 2201 second recess, 2202 opening, 2203 limiting convex portion, 2204 first accommodating groove, 2205 second accommodating groove, 2206 third through hole

[0084] 20111 second screw, 20112 second gasket, 20211 limiting groove

[0085] 300 snap-in slot, 310 connecting rod, 320 reinforcement tube

[0086] 400 snap-fit ​​part, 401 lock tongue, 410 hook part

[0087] 4011 Curved face

[0088] 500 Seat Belt

[0089] D1 Forward

[0090] D2 Backward

[0091] d1: the length of the safety belt passing through the first through hole

[0092] d2 Length of the folded portion of the seat belt

[0093] d3 The length of the safety belt passing through the first through hole

[0094] L1 Height of the upper edge of the second through hole in the vertical direction

[0095] L2 Height of the upper edge of the first through hole in the vertical direction

[0096] 6Child safety seats

[0097] 61 base, 610 armrest, 611 first side

[0098] 62 backrest, 620 wing, 621 second side

[0099] 630 limiting mechanism, 631 positioning concave, 632 first positioning convex, 633 second positioning convex, 634 third positioning convex, 635 friction member, 636 limiting rib

[0100] 7 child safety seats,

[0101] 700 ISOFIX safety release system, 710 first release device, 711 fixing seat, 712 first release operation part, 713 first driving member 7110 third accommodation space, 7111 observation window, 7112 second guide member, 7133 pivot axis, 7120 first joint part, 7121 first pressing part, 7122 color indicator device, 7123 pivot space, 7124 first guide member, 7125 second joint part, 7131 first arm, 7132 second arm 71251 step surface

[0102] 720ISOFIX connector

[0103] 7201 housing, 7202 bracket, 7203 second driving member, 7204 second engaging member, 7205 hook, 7206 limiting member, 7207 sixth elastic member, 7208 seventh elastic member

[0104] 72021 second slide, 72032 third surface, 72051 boss, 72052 first surface, 72053 second surface, 72054 pin

[0105] 730 second release device, 732 fifth elastic member

[0106] 7310 third joint part, 7311 second unlocking operation part, 7312 limiting space

[0107] 73101 Miter joint

[0108] 740 Second connecting piece DETAILED DESCRIPTION

[0109] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0110] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0111] It should be noted that, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships that are shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0112] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0113] refer to Figures 1 to 3In one embodiment of the present application, a child safety seat 1 includes a seat adjustment system 10, the seat adjustment system 10 includes a seat 100 and a base 110, the seat 100 is slidably connected to the upper surface of the base 110, and the seat 100 can slide relative to the base 110 between a first position and a second position. Figure 2 and Figure 3 ,exist Figure 2 In the child safety seat 1 shown, the seat plate 100 is in the first position. At this time, the total seat cushion length of the child safety seat 1 is relatively short, and is suitable for young children, such as 3-5 years old, to ride. Figure 2 The seat plate 100 shown slides forward along the direction D1 to enter the second position (eg Figure 3 In this case, the total seat cushion length of the child safety seat 1 is relatively long, and is suitable for young children aged 6-12 years old, for example. Figure 3 The seat plate 100 shown slides backward along the direction D2 opposite to the direction D1 to enter the first position (eg Figure 2 ). In the present application, the D1 direction is defined as the "front" direction, and the D2 direction is defined as the "rear" direction. The "front" mentioned in the following text is the D1 direction, and the "rear" is the D2 direction. The direction perpendicular to both the sliding direction and the vertical direction is the transverse direction. When the seat plate 100 is in the first position, the front end of the seat plate is roughly flush with the front end of the base. When the seat plate 100 is in the second position, the front end of the seat plate extends from the front end of the base. Therefore, the seat length of the child safety seat 1 when the seat plate 100 is in the first position is less than the seat length of the child safety seat 1 when the seat plate 100 is in the second position.

[0114] Join reference Figure 4A and Figure 5 , Figure 4A is a schematic structural diagram of a seat plate according to an embodiment of the present application, Figure 5 is a perspective schematic diagram of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a first position. Figure 4A In the illustrated embodiment, the seat plate 100 is provided with at least one first connection portion 101. Specifically, in this embodiment, four first connection portions 101 are provided. Optionally, more or less than four first connection portions may be provided, such as three, six, etc. The number of first connection portions may be reasonably selected according to actual needs, and the present application does not impose any restrictions on this. Specifically, the first connection portion 101 is a connection column fixedly provided on the side of the seat plate 100 facing the base 110. Figure 5In the illustrated embodiment, the base 110 is provided with at least one second connection portion 111 that cooperates with the first connection portion 101, and the seat plate 100 is slidably connected to the base 110 through the cooperation of the first connection portion 101 and the second connection portion 111. Specifically, in the present embodiment, four second connection portions 111 are provided. Optionally, more or less than four second connection portions, such as three, six, etc., may also be provided, and the number of second connection portions matches the number of first connection portions. Specifically, the second connection portion 111 is a first connection groove provided on a side of the base 110 facing the seat plate 100. The first connection groove extends in the front-to-back direction of the seat. The connection column is inserted into the first connection groove to play a guiding role, that is, the seat plate 100 can slide forward and backward along the length direction of the first connection groove, while preventing the seat plate 100 from moving and deviating in the lateral direction.

[0115] Continue to refer Figure 4A and Figure 5 ,exist Figure 4A In the illustrated embodiment, the seat plate 100 is provided with at least one first adjustment portion 102. Specifically, in this embodiment, two first adjustment portions 102 are provided. Optionally, more or less than two first adjustment portions may be provided, such as one, four, etc. The number of first adjustment portions may be reasonably selected according to actual needs, and the present application does not impose any restrictions on this. Specifically, the first adjustment portion 102 is an adjustment column fixedly provided on the side of the seat plate 100 facing the base 110. Figure 5In the illustrated embodiment, the base 110 is provided with a second adjustment portion 112 and a third adjustment portion 113 that cooperate with the first adjustment portion 102. Specifically, two second adjustment portions 112 and two third adjustment portions 113 are provided. Optionally, more or fewer second adjustment portions and third adjustment portions may also be provided, and the number of the second adjustment portions and the number of the third adjustment portions respectively matches the number of the first connection portions. Specifically, the second adjustment portion 112 is a first adjustment hole provided on the side of the base 110 facing the seat plate 100, and the third adjustment portion 113 is a second adjustment hole provided on the side of the base 110 facing the seat plate 100. The position of the first adjustment hole is set so that when the seat plate 100 slides to the first position, the adjustment column can be inserted into the first adjustment hole so that the seat plate 100 is fixed in the first position. If the seat plate 100 is to be released from the first position, it is only necessary to lift the seat plate 100 upward so that the adjustment column is disengaged from the first adjustment hole, and the release of the seat plate can be achieved. The position of the second adjustment hole is set so that when the seat plate 100 slides to the second position, the adjustment column can be inserted into the second adjustment hole to fix the seat plate 100 in the second position. Similarly, to release the seat plate 100 from the second position, it is only necessary to lift the seat plate 100 upwards so that the adjustment column disengages from the second adjustment hole, and the seat plate can be released. Those skilled in the art will appreciate that the provision of the first adjustment hole and the second adjustment hole is merely exemplary, and additional adjustment holes, such as a third adjustment hole, a fourth adjustment hole, etc., may be provided according to usage requirements to fix the seat plate 100 in more positions, such as the third position, the fourth position, etc., and the present application does not impose specific restrictions on this. Figure 4A and Figure 5In the embodiment shown, the seat plate 100 can be released from the first position or the second position by simply lifting the seat plate 100, so as to slide the seat plate 100 and change the length of the seat, which is convenient to operate and easy to use. The length of the first adjustment portion 102 is shorter than the length of the first connection portion 101. The seat plate 100 is lifted upward until the first stopper 1011 abuts against the lower surface of the upper plate of the base 110, and the first adjustment portion 102 is completely disengaged from the second adjustment portion 112 or the third adjustment portion 113, so that the first connection portion 101 and the second connection portion 111 can move relative to each other in the vertical direction without disengagement, so that the first adjustment portion 102 is disengaged from the second adjustment portion 112 or the third adjustment portion 113. In some embodiments, the first adjustment portion 102 can also be one or more groups of anti-skid ribs extending in the transverse direction, and the second adjustment portion 112 is an anti-skid groove matching the shape of the anti-skid rib, and the anti-skid grooves are distributed in the front-to-back direction on the upper surface of the base 110, and the number is greater than the anti-skid ribs. The anti-skid ribs cooperate with the anti-skid grooves to prevent the seat plate 100 from moving in the front-to-back direction relative to the base 110. When the anti-skid ribs cooperate with a portion of the anti-skid grooves near the rear, the seat plate 100 is located in the first position, and the child safety seat 1 is suitable for children with smaller bodies to sit on; when the anti-skid ribs cooperate with a portion of the anti-skid grooves near the front, the seat plate 100 is located in the second position, and the child safety seat 1 is suitable for children with larger bodies to sit on.

[0116] See also Figure 7 and Figure 8, the upper surface of the base 110 has an inclined surface, the height of which gradually decreases from the front end of the base 110 toward the backrest direction. Exemplarily, the average slope of the inclined surface relative to the horizontal plane is about 10 degrees. When the seat plate 100 is attached to the upper surface of the base 110, the front edge of the seat plate 100 is tilted, so that the user can lift the seat plate 100 from the front edge. On the other hand, the slope of the upper surface is higher on the side close to the front end of the base 110, and the slope is lower on the side close to the front end of the base 110. In other words, the upper surface of the base 110 is slightly concave in the front-to-back direction. The second adjustment portion 112 is closer to the backrest than the third adjustment portion 113 in the front-to-back direction. The second adjustment portion 112 and the third adjustment portion 113 extend in the vertical direction, so that the second adjustment portion 112 and the third adjustment portion 113 are at an angle of 5 to 15 degrees with the upper surface of the base 110. Correspondingly, the first connecting portion 101 and the first adjusting portion 102 also extend in the vertical direction and form a certain angle with the seat plate 100. In some other embodiments, the second adjusting portion 112 and the third adjusting portion 113 form different angles with the upper surface of the base 110. Exemplarily, the second adjusting portion 112 forms an angle of 85 degrees with the upper surface of the base 110, and the third adjusting portion 113 forms an angle of 80 degrees with the upper surface of the base 110. Thus, when the first adjusting portion 102 located at the front edge of the seat plate 100 is buckled in the third adjusting portion 113 (in the second position), the rear edge of the seat plate 100 applies greater pressure on the contact surface with the base 110, thereby preventing the rear edge of the seat plate 100 from warping. The second adjustment portion 112 and the third adjustment portion 113 have different heights. Specifically, the height of the bottom of the second adjustment portion 112 in the vertical direction is lower than the height of the third adjustment portion 113 in the vertical direction, or the height of the upper edge of the second adjustment portion 112 in the vertical direction is lower than the height of the third adjustment portion 113 in the vertical direction. The height of the seat plate 100 in the vertical direction when the first adjustment portion 102 of the seat plate 100 is inserted at the second adjustment portion 112 (i.e., when the seat plate 100 is in the first position) is lower than the height of the seat plate 100 when the first adjustment portion 102 of the seat plate 100 is inserted at the third adjustment portion 113 (i.e., when the seat plate 100 is in the second position). The first adjustment portion 102 is located at the front side (e.g., at the front edge) of the seat plate 100 in the front-to-back direction. The first connecting portion 101 is provided at the front and rear sides of the seat plate 100, respectively. For example, two first connection parts 101 are located at the front edge of the seat plate 100 in the front-to-back direction, and two first connection parts 101 are located at the rear edge of the seat plate 100 in the front-to-back direction, wherein the length of the first connection part 101 located at the front edge is greater than the length of the first connection part 101 located at the rear edge.Exemplarily, the first connection part 101 at the front edge can move in the vertical direction and the front-to-back direction relative to the first connection part 111; the first connection part 101 at the rear edge cannot move in the vertical direction relative to the first connection part 111, but can only move in the front-to-back direction. The seat plate 100 is made of elastic materials such as rubber and TPR (Thermoplastic Rubber). When the user lifts the seat plate 100 using the third recess 104 at the front edge of the seat plate 100, the seat plate 100 will deform. For details, see. Fig.10 and 11 ,exist Fig.10 On the basis of the child safety seat 1 shown in the figure, when the user lifts the seat plate 100 by using the third recessed portion 104 on the front edge of the seat plate 100, the front edge of the seat plate 100 separates from the base 110 in the vertical direction, so that the first adjustment portion 102 separates from the third adjustment portion 113; and the flat plate-shaped portion of the rear edge of the seat plate 100 still adheres to the base 110 under the fixing action of the first connecting portion 101 provided at the rear, so that the middle portion of the seat plate 100 is deformed concavely toward one side of the base 110. As a result, the user does not need to lift the entire seat plate 100 off the base 110, but can push the seat plate 100 to slide back and forth on the base 110, thereby ensuring the stability of the sliding. The user pushes the seat plate 100 along the direction D2, so that the seat plate 100 slides on the base 110 toward the back-leaning direction. When the seat plate 100 slides to Fig.11 When the seat plate 100 is in the position shown, the user stops applying the force along D2 and the vertical upward force. At this time, the seat plate 100 returns to the state before the deformation under the action of elastic potential energy, and the first adjustment portion 102 is vertically inserted into the second adjustment portion 112 to lock the base 110 in the first position. In some embodiments, the seat plate 100 can be made of a rigid material such as polyphenylene sulfide (PPS), and the length of the first connection portion 101 near the front end of the seat plate 100 is greater than the length of the first connection portion 101 near the rear end of the seat plate 100. When the user lifts the seat plate 100 using the third recess 104 at the front edge of the seat plate 100, the front edge of the seat plate 100 is separated from the base 110 in the vertical direction, and under the connection of multiple first connection portions 101 of different lengths, the rear edge of the seat plate 100 pivots relative to the base 110.

[0117] Continue to refer Figure 4A and Figure 5 In this embodiment, the seat plate 100 further includes a first through hole 103 for passing the safety belt 500 (crotch belt), and the base 110 further includes a second through hole 114 for passing the crotch belt. The length of the first through hole 103 in the sliding direction is greater than the length of the second through hole 114 in the sliding direction, and in the sliding stroke of the seat plate 100 from the first position to the second position, the projection of the second through hole 114 in the vertical direction is always located within the projection of the first through hole 103 in the vertical direction (refer to Figure 6 Thus, during the sliding process of the seat plate 100 between the first position and the second position, the first through hole 103 and the second through hole 114 always have a partially overlapping area in the vertical direction, so that the crotch belt will not be bent when passing through the first through hole 103 and the second through hole 114, thereby affecting the length of the crotch belt.

[0118] In other embodiments, reference Figure 4B ,exist Figure 4B In the embodiment shown, the extension of the first through hole 103' in the front-to-back direction is less than or equal to Figure 4A The first through hole 103 shown extends in the front-to-back direction. When the seat plate 100 is in the first position, the projection of the second through hole 114 in the vertical direction does not overlap with the projection of the first through hole 103 in the vertical direction; when the seat plate 100 is in the second position, at least a portion of the projection of the second through hole 114 in the vertical direction overlaps with the projection of the first through hole 103' in the vertical direction. A second accommodating space (not shown) suitable for accommodating a safety belt is formed between the seat plate 100 and the base 110. Therefore, when the seat plate 100 is in the first position, the safety belt passing through the first through hole 103' and the second through hole 114 will be folded, and a portion of the safety belt will be in the second accommodating space, so the length of the safety belt passing through the first through hole 103' is less than the length of the safety belt passing through the first through hole 103. When the seat plate 100 is in the second position, the first through hole 103' and the second through hole 114 are aligned in the vertical direction, and the safety belt passing through the first through hole 103' and the second through hole 114 does not fold. Therefore, the length of the safety belt passing through the first through hole 103' when the seat plate 100 is in the second position is greater than the length of the safety belt passing through the first through hole 103 when the seat plate 100 is in the first position. When the seat plate 100 is in the first position, the seat length is shorter and is suitable for children with smaller bodies, and the length of the safety belt suitable for children with smaller bodies is also shorter. When the seat plate 100 is in the second position, the seat length is longer and is suitable for children with larger bodies, and the length of the safety belt suitable for children with larger bodies is also longer. In addition, when the seat plate 100 slides from the first position to the second position, the position of the first through hole 103' also moves forward, driving the position of the safety belt to move forward, thereby leaving more riding space in the front-to-back direction for the crotch of a larger child. Therefore, Figure 4B The first through hole 103' shown can reduce the workload of shortening the safety belt and increase the usability of the child safety seat, which will be further described later.

[0119] refer to Figure 5 and Figure 6In one embodiment of the present application, the base 110 is further provided with a fourth recess 117. The fourth recess 117 is suitable for being passed through by the safety belt adjustment belt. A locking member 118 is also provided in the fourth recess 117. The locking member 118 is configured to allow only one-way sliding of the safety belt adjustment belt. Specifically, the safety belt (e.g., shoulder belt, crotch belt or waist belt) of the child safety seat includes a use portion and a free portion. The use portion is exposed outside the child safety seat, for example, outside the backrest 20 or the seat plate 100. A buckle (e.g., a five-point buckle) is slidably arranged on the use portion. The child is fixed to the child safety seat by the use portion and the buckle of the safety belt. The free portion is arranged inside the child safety seat, for example, inside the backrest 20 or between the seat plate 100 and the base 110. The free portion of the safety belt is connected with a safety belt adjustment belt. By pulling the safety belt adjustment belt, the user can reduce the length of the use portion of the safety belt so that the safety belt is suitable for children of different sizes. The locking member 118 can be switched between a locked state and a released state. The locking member 118 includes a reset member, which constantly makes the locking member 118 have a tendency to return to the locked state, and keeps the locking member 118 in the locked state. In the locked state, the locking member 118 only allows the safety belt adjustment belt to slide in the direction that reduces the length of the use portion. In the released state, the locking member 118 does not limit the sliding of the safety belt adjustment belt. The safety belt adjustment belt passes through the fourth recess 117 so that at least a part of the safety belt adjustment belt can reach the outside of the child safety seat from the inside of the child safety seat. The user pulls the safety belt adjustment belt to reduce the length of the use portion of the safety belt. In the present embodiment, the safety belt adjustment belt is connected to the shoulder belt. Optionally, the safety belt adjustment belt can also be connected to other safety belts, such as a crotch belt, a waist belt, etc. In one embodiment of the present application, the seat plate 100 is also provided with a fourth through hole 105. Optionally, during the sliding stroke of the seat plate 100 from the first position to the second position, the projection of the fourth through hole 105 in the vertical direction at least partially overlaps with the projection of the fourth recess 117 in the vertical direction. After passing through the fourth recess 117, the seat belt adjustment belt can continue to pass through the fourth through hole 105 to be exposed outside the seat plate 100, so as to facilitate the user to operate the seat belt adjustment belt. Optionally, the fourth through hole 105 allows the user to contact and operate the locking member 118 to switch the locking member 118 from the locked state to the unlocked state.

[0120] refer to Figures 6 to 8 , Figure 6 is a schematic top view of a child safety seat according to an embodiment of the present application, wherein the seat plate 100 is in the second position; Figure 7 Along Figure 6 Sectional view along the midline BB; Figure 8 Along Figure 6 The cross-sectional view of the AA line. Figure 7As shown, a first stopper 1011 is provided at one end of the first connection part 101, for example, a connection column, away from the seat plate 100. The first stopper 1011 is detachably fixed to the end of the connection column away from the seat plate 100, and the size of the first stopper 1011 is set to be unable to pass through the first connection groove. Specifically, in this embodiment, the first stopper 1011 is a gasket, which is fixed to the end of the connection column away from the seat plate 100 by a screw 1013. The diameter of the gasket is larger than the second connection part 111, for example, the horizontal width of the first connection groove, so the gasket cannot pass through the first connection groove. When the seat plate 100 is lifted upward, when the gasket abuts against the back side of the side of the base 110 facing the seat plate 100, the seat plate will be restricted and cannot be lifted further. By providing a gasket, the bottom surface of the seat plate can be allowed to be separated from the contact with the top surface of the base, while preventing the seat plate from being completely separated from the connection with the base due to lifting upward. In this embodiment, the length of the connecting post extending out of the first connecting groove is greater than the depth of the adjusting post inserted into the first adjusting hole or the second adjusting hole (combined with reference to Figure 8 ). Thus, while preventing the seat plate from being disengaged from the base due to upward lifting, the adjustment column is allowed to be disengaged from the first adjustment hole or the second adjustment hole. Those skilled in the art should understand that the gasket is only exemplary, and the first stopper 1011 can also be other suitable mechanisms, such as a thumb screw, etc., and the present application does not limit this.

[0121] Continue to refer Figure 7 ,exist Figure 7In the embodiment shown, a first elastic member 1012 is disposed around the connecting column, one end of the first elastic member 1012 abuts against the back side of the base 110 facing the seat plate 100, and the other end of the first elastic member 1012 abuts against the first stopper 1011. The first elastic member 1012 biases the connecting column in a direction away from the seat plate 100 through the first stopper 1011, that is, biases in a direction engaged with the first adjustment hole and the second adjustment hole. Specifically, in this embodiment, the first elastic member 1012 is a coil spring, which surrounds the connecting column and abuts against the back side of the base 110 facing the seat plate 100 and the first stopper 1011 at the same time. The coil spring biases the connecting column in a direction away from the seat plate 100 through the first stopper 1011, thereby biasing the seat plate 100 toward the base 110. When lifting the seat plate 100, the bias provided by the coil spring needs to be overcome to lift the seat plate 100. When the external force used to lift the seat plate 100 is removed, the seat plate 100 falls back toward the base 110 under the action of the coil spring. If the seat plate 100 is in the first position or the second position at this time, the adjustment column will be inserted into the first adjustment hole or the second adjustment hole. Biasing the seat plate 100 toward the base 110 by the first elastic member 1012 is very advantageous in the actual use of the child safety seat. The user does not need to press the seat plate 100 toward the base 110 while sliding the seat plate 100, but only needs to slide the seat plate 100. When the seat plate 100 reaches the first position or the second position, under the action of the first elastic member 1012, the adjustment column will automatically insert into the first adjustment hole or the second adjustment hole, and the seat plate 100 will automatically fall back to the initial height. The provision of the first elastic member 1012 simplifies the sliding and adjustment of the seat plate 100 in at least two aspects:

[0122] a) It is convenient to adjust the position of the seat plate. When the user slides the seat plate 100, the first adjustment part 102, the second adjustment part 112 and the third adjustment part 113 cannot be observed, and therefore it is impossible to visually determine whether the seat plate 100 has reached the first position or the second position. A first elastic member 1012 is provided, and when the seat plate 100 reaches the first position or the second position, the adjustment column automatically enters the first adjustment hole or the second adjustment hole under the elastic force of the first elastic member 1012, thereby avoiding the workload of the user in finding the first position or the second position.

[0123] b) Automatic reset of the seat plate. A first elastic member 1012 is provided, and when the seat plate 100 reaches the first position or the second position, the adjustment column will automatically insert into the first adjustment hole or the second adjustment hole, and the seat plate 100 will automatically fall back to the initial height, thereby eliminating the need for the user to press down the seat plate 100 to return the seat plate to the initial height.

[0124] Optionally, a first elastic member 1012 is provided on each connecting column.

[0125] Reference again Figure 5 ,exist Figure 5 In the illustrated embodiment, a storage groove 115 is provided on the side of the base 110 facing the seat plate 100. Compared with the second through hole 114, the storage groove 115 is located closer to the front end of the base 110. The storage groove 115 and the area of ​​the seat plate 100 corresponding to the storage groove 115 form a storage space for storing the crotch strap and the crotch strap buckle. Those skilled in the art should understand that the size and position of the storage groove 115 can be reasonably selected according to actual needs, and this application does not limit this. Further, in Figure 5 In the embodiment shown, a first recess 116 is formed on the side of the front end of the base 110 facing the seat plate 100. The first recess 116 is formed by the side of the base 110 facing the seat plate 100 being recessed in a direction away from the seat plate 100. The first recess 116 forms an operating space between the front end of the seat plate 100 and the front end of the base 110. In actual operation, after the user puts his hand into the operating space, he pushes against the side of the front end of the seat plate 100 facing the operating space to lift the seat plate 100. Further, referring to Figure 4A and Figure 4B A third recess 104 is provided on one side of the front end of the seat plate 100 facing the operating space. The user puts his hand into the operating space and then grasps the front edge of the third recess 104 to facilitate lifting and sliding the seat plate 100. Figure 7 ,exist Figure 7 In the illustrated embodiment, a gap 120 for allowing an adjustment belt for adjusting the length of a safety belt (shoulder belt) to pass through is formed between a side of the front end of the base 110 facing the seat plate 100 and a side of the front end of the seat plate 100 facing the base 110 .

[0126] refer to Figures 9 to 11 , Fig. 9 is a perspective schematic diagram of a child safety seat 1 according to an embodiment of the present application, wherein the seat plate 200 is in the second position; Fig.10 is a side view schematic diagram of a child safety seat 1 according to an embodiment of the present application, wherein the seat plate 200 is in the second position, at which time the child safety seat 1 provides a longer riding length in the front-to-back direction, and is suitable for larger children to ride; Fig.11 : is a side view schematic diagram of a child safety seat 1 according to an embodiment of the present application, wherein the seat plate 200 is in the first position. At this time, the riding length provided by the child safety seat 1 in the front-to-back direction is shorter than the riding length when the seat plate 200 is in the second position, and is suitable for children of smaller size. In the embodiment of the present application, the child safety seat 1 includes a seat plate adjustment system 10, and the seat plate adjustment system 10 includes a seat plate 200 and a base 210. The seat plate 200 is slidably connected to the base 210, and the seat plate 200 can slide relative to the base between the first position and the second position. Fig.10 and Fig.11 ,exist Fig.10 In the child safety seat 1 shown, the seat plate 210 is in the second position. Fig.10 The seat plate 200 shown slides along the direction D2 to enter the first position (eg Fig.11 Similarly, in Fig.11 The seat plate 200 shown slides along the direction D1 opposite to the direction D2 to enter the second position (eg Fig.10 The seat plate 200 has a first through hole 2001 for inserting the crotch strap and a first recess 2201 for operating the seat plate 200. In this embodiment, the first through hole 2001 and the first recess 2102 are connected to the seat plate 200. Figure 4B and Figure 5 The first through hole 103 ′ and the first recess 2201 in the illustrated embodiment are similar in structure and function, and will not be described again here.

[0127] refer to Figure 12 to Figure 14 , Fig.12 is a structural schematic diagram of a seat plate according to an embodiment of the present application; Fig.13 is a perspective schematic diagram of a child safety seat according to an embodiment of the present application, wherein the seat plate is in a hidden state; Fig.14 2 is a schematic diagram of the structure of a seat plate 200 according to an embodiment of the present application, wherein the upper plate 250 on the side of the seat plate away from the base is removed. Figure 12 to Figure 14 In the illustrated embodiment, the seat plate 200 includes an upper plate 250 and a lower plate 220, the upper plate 250 is connected to the lower plate 220, and a first accommodating space 230 is formed between the upper plate 250 and the lower plate 220. The upper plate 250 and the lower plate 220 are buckled to form a step-like structure. For example, the length of the upper plate 250 in the front-to-back direction is longer than the length of the lower plate 220, so that when the upper plate 250 and the lower plate 220 are buckled, the upper plate 250 has a flat plate portion that does not overlap with the lower plate 220 in a section close to the backrest, and the thickness of the flat plate portion in the vertical direction is less than the thickness of the buckled portion of the upper plate 250 and the lower plate 220. The base 210 is formed with a step-like structure. When the seat plate 200 is in the first position, the flat plate portion of the seat plate 200 overlaps with the upper part of the step-like structure of the base 210. When the seat plate 200 slides from the first position to the second position, the flat plate portion of the upper plate 250 vertically blocks the cavity formed between the lower plate 220 and the lower portion of the stepped structure of the base 210 to avoid pinching the buttocks of the child, thereby improving the riding experience. The first connecting portion 201 is disposed on a side of the lower plate 220 facing the base 210, the first adjusting portion 202 is disposed on a side of the lower plate 220 away from the base 210, and a portion of the first adjusting portion 202 is located in the first accommodating space 230.

[0128] In this embodiment, the first connection part 201 is a convex strip, which is fixedly arranged on the side of the seat plate 200 facing the base 210, and the convex strip extends in the front-to-back direction of the seat plate 200. Specifically, two convex strips are provided. Optionally, more or less than two first connection parts may be provided, such as one, four, etc. The number of first connection parts may be reasonably selected according to actual needs, and this application does not impose any restrictions on this. Preferably, two convex strips are provided. The two convex strips are symmetrically arranged on the seat plate 200 with respect to the vertical direction.

[0129] In the present embodiment, the second connection portion 211 is a second connection groove, which is provided on the side of the base 210 facing the seat plate 200, and is recessed in a direction away from the seat plate 200, and extends in the front-to-back direction of the base 210. Specifically, two second connection grooves are provided, and the second connection grooves are symmetrically arranged on the base 210 with respect to the vertical direction. The positions of the second connection grooves are arranged such that two convex strips can be respectively embedded in the two second connection grooves, and the length of the second connection grooves in the front-to-back direction is greater than the length of the convex strips, so the convex strips are slidable along the second connection grooves, and the seat plate 200 slides in the front-to-back direction of the base 210 by the convex strips sliding in the second connection grooves, while limiting the left-right sliding of the seat plate 200 in the lateral direction of the base 210.

[0130] In this embodiment, reference Fig.12 , a second stopper 2011 is provided on the side of the convex strip away from the seat plate 200, and the second stopper 2011 is connected to the side of the convex strip away from the seat plate 200. Specifically, two second stoppers 2011 are provided on each convex strip, and the two second stoppers 2011 are respectively located at the two ends of the convex strip. Optionally, other numbers of second stoppers 2011 may also be provided on each convex strip, such as 1, 4, etc. Optionally, the second stopper 2011 may be provided at any position of the convex strip. Those skilled in the art should understand that the number and position of the second stopper 2011 can be selected according to actual needs, and the present application does not limit this. A through groove 2111 is provided at the bottom of the second connecting groove, and the through groove 2111 runs through the bottom of the second connecting groove, and the through groove 2111 extends in the front-to-back direction of the base 210. The position and number of the through groove 2111 correspond to the number and position of the second stopper 2011. After the second stopper 2011 passes through the through slot 2111 from the back side of the second connecting groove, it is detachably fixed to the side of the protruding strip away from the seat plate 200. Optionally, the size of a portion of the second stopper 2011 is set to be unable to pass through the through slot 2111. The second stopper 2011 can slide in the through slot 2111, whereby the sliding stroke of the second stopper 2011 in the through slot 2111 limits the sliding stroke of the protruding strip in the second connecting groove, and limits the sliding stroke of the seat plate 200 in the front-rear direction of the base 210.

[0131] Specifically, refer to Fig.15 , Fig.15 It is along Fig.13 The cross-sectional schematic diagram along the CC line in the middle, in which the backrest structure is partially omitted. In this embodiment, the second stopper 2011 includes a second screw 20111 and a second gasket 20112. The second screw 20111 passes through the through slot 2111 to fix the second gasket 20112 on the side of the convex strip away from the seat plate 200, and presses the second gasket 20112 against the back side of the bottom of the second connecting groove. The size of the second gasket 20112 is set to be unable to pass through the through slot 2111. By setting the second stopper 2011, the freedom of the seat plate 200 in the vertical direction is limited, so that the seat plate 200 cannot be lifted and lowered in the vertical direction relative to the base 210. Those skilled in the art should understand that the gasket is only exemplary, and the second stopper 2011 can also be other suitable mechanisms, such as a thumb screw, etc., and the present application does not limit this.

[0132] In one embodiment, a second elastic member (not shown) may be disposed around the second screw 20111, one end of the second elastic member abuts against the back side of the bottom of the second connecting groove, and the other end of the second elastic member abuts against the second gasket 20112. The second elastic member biases the second screw 20111 in a direction away from the seat plate 200 through the second gasket 20112. Specifically, the second elastic member may be a coil spring. The second elastic member may at least prevent the second screw 20111 from gradually loosening during use, thereby increasing the service life of the seat plate adjustment system.

[0133] refer to Fig.14The upper plate 250 and the lower plate 220 define a first accommodation space 230 inside the seat plate 200, and the first adjustment portion 202 is at least partially disposed in the first accommodation space 230. The first adjustment portion 202 includes: an operating member 2021, which is engaged in the first slide groove of the lower plate 220 and can slide between a locking position and an adjustment position; and a first engaging member 2023, which is operably connected to the operating member 2021, can slide between an extended position and a retracted position, and is suitable for engaging with the second adjustment portion 212 and the third adjustment portion 213. When the operating member 2021 moves to the locking position, the first engaging member 2023 is driven by the operating member 2021 to move to the extended position, and at this time, the first engaging member engages with the second adjustment portion 212 and the third adjustment portion 213 to limit the sliding of the seat plate 200 in the front-rear direction, thereby locking the seat plate 200 at the first position or the second position. When the operating member 2021 moves to the adjustment position, the first engaging member 2023 is driven by the operating member 2021 to move to the retracted position, at which time the first engaging member is no longer engaged with the second adjustment portion 212 and the third adjustment portion 213, and the seat plate 200 can slide freely in the front-to-back direction of the base 210, thereby adjusting the position of the seat plate 200. In addition, the operating member 2021 slides along the front-to-back direction, and the first engaging member 2023 slides along the lateral direction, and the sliding directions of the two are perpendicular to each other. Specifically, the first engaging member 2023 is a cylindrical latch, and the second adjustment portion 212 and the third adjustment portion 213 are jacks. Optionally, the first engaging member can also be set to an element of other shapes, as long as it can meet the requirements of the clamping connection with the second adjustment portion 212 and the third adjustment portion 213.

[0134] In this embodiment, since the first engaging member 2023 is operably connected to the operating member 2021 , the sliding of the operating member 2021 can change the position of the first engaging member 2023 . Specifically, when the seat plate 200 is in the first position, the operating member 2021 is slid to the locking position, so that the first engaging member 2023 slides to the extended position, the first engaging member 2023 engages with the second adjustment portion 212, and the seat plate 200 is fixed to the first position; the operating member 2021 is slid to the adjustment position, so that the first engaging member 2023 slides to the retracted position, the first engaging member 2023 disengages from the second adjustment portion 212, and the seat plate 200 is released from the first position; when the seat plate 200 is in the second position, the operating member 2021 is slid to the locking position, so that the first engaging member 2023 slides to the extended position, the first engaging member 2023 engages with the third adjustment portion 213, and the seat plate 200 is fixed to the second position; the operating member 2021 is slid to the adjustment position, so that the first engaging member 2023 slides to the retracted position, the first engaging member 2023 disengages from the third adjustment portion 213, and the seat plate 200 is released from the second position.

[0135] Continue to refer Fig.14 Optionally, the first adjustment portion 202 further includes a first connecting member 2022, one end of which is fixedly connected to the operating member 2021, and the other end of which is fixedly connected to the first engaging member 2023. Preferably, the first connecting member 2022 is a flexible connecting strip, which is arranged in the arc-shaped first slide groove of the lower plate 220. When the first connecting member 2022 slides in the first slide groove, the first connecting member 2022 can adapt to the shape of the first slide groove and undergo corresponding deformation, thereby converting the forward and backward movement of the operating member 2201 into the lateral movement of the first engaging member 2023. Optionally, the first connecting member 2022 is integrated with the operating member 2021.

[0136] Combination Fig.13 and Fig.14 , the second adjustment portion 212 is a third adjustment hole, the third adjustment portion 213 is a fourth adjustment hole, the third adjustment hole and the fourth adjustment hole are arranged on the side of the base 210 facing the seat plate 200, and the third adjustment hole and the fourth adjustment hole extend in the horizontal direction of the base 210. When the seat plate 200 slides to the first position, the operating member 2021 is slid to the locking position, so that the first engaging member 2023 slides to the extended position. At this time, a part of the first engaging member 2023 is inserted and fixed in the third adjustment hole, thereby limiting the sliding of the seat plate 200 in the front-to-back direction, and the seat plate 200 is fixed in the first position; the operating member 2021 is slid to the adjustment position, so that the first engaging member 2023 slides to the retracted position. At this time, the first engaging member 2023 is disengaged from the third adjustment hole, thereby releasing the restriction on the sliding of the seat plate 200 in the front-to-back direction, and the seat plate 200 is unfixed from the first position. When the seat plate 200 slides to the second position, the operating member 2021 is slid to the locking position, so that the first engaging member 2023 slides to the extended position. At this time, a part of the first engaging member 2023 is inserted into and fixed in the fourth adjustment hole, thereby limiting the sliding of the seat plate 200 in the front-to-back direction, and the seat plate 200 is fixed in the second position; the operating member 2021 is slid to the adjustment position, so that the first engaging member 2023 slides to the retracted position. At this time, the first engaging member is disengaged from the fourth adjustment hole, thereby releasing the restriction on the sliding of the seat plate 200 in the front-to-back direction, and the seat plate 200 is unfixed from the second position.

[0137] Continue to refer Fig.14In one embodiment, the first accommodation space 230 is further provided with a first accommodation groove 2204 and a second accommodation groove 2205 which are connected to each other. The first accommodation groove 2204 is suitable for accommodating the first connecting member 2022, and the second accommodation groove 2205 is suitable for accommodating the first engaging member 2023. The first accommodation space 230 is further provided with a third through hole 2206 which is connected to the second accommodation groove 2205, and the first engaging member 2023 can partially pass through the third through hole 2206. When the first engaging member 2023 slides to the extended position, a part of the first engaging member 2023 passes through the third through hole 2206 and enters the third adjustment hole or the fourth adjustment hole, and another part of the first engaging member 2023 is located in the third through hole 2206.

[0138] In one embodiment, the seat plate 200 also includes a second recess 2201, which is formed by recessing at least a portion of the side of the front end of the seat plate 200 facing the base 210 in a direction away from the base 210, and an opening 2202 is provided on the inner wall of the second recess 2201 away from the front end of the seat plate 200, and the opening 2202 is connected to the first accommodating space 230, and the operating member 2021 is slidably disposed in the second recess 2201 and can at least partially pass through the opening 2202.

[0139] In one embodiment, the first adjustment portion 202 further includes a third elastic member 2024, one end of the third elastic member 2024 is fixedly connected to the operating member 2021, and the other end of the third elastic member 2024 is fixedly connected to the seat plate 200, and the third elastic member 2024 makes the operating member 2021 have a tendency to slide toward the locking position. Preferably, the third elastic member 2024 is a tension spring. Those skilled in the art should understand that the tension spring in this embodiment is only exemplary, and the third elastic member 2024 can also be other suitable elements such as a torsion spring, and the present application does not limit this.

[0140] In one embodiment, a limiting groove 20211 is provided on the operating member 2021, and a limiting protrusion 2203 cooperating with the limiting groove 20211 is provided in the first accommodating space 230, and the limiting protrusion 2203 is provided on a side of the lower plate 220 away from the base 210. The limiting groove 20211 extends in the front-to-back direction of the base 210. When the front end of the limiting groove 20211 abuts against the limiting protrusion 2203, the operating member 2021 reaches a first limit position. Optionally, the first limit position corresponds to the locking position of the operating member 2021. When the rear end of the limiting groove 20211 abuts against the limiting protrusion 2203, the operating member 2021 reaches a second limit position. Optionally, the second limit position corresponds to the adjustment position of the operating member 2021.

[0141] The following will be combined Fig.16A , Fig. 16B , Fig.17A and Fig. 17B The influence of the sliding of the seat plate 100 between the first position and the second position on the safety belt 500 (e.g., crotch belt) is further described. In this embodiment, when the seat plate 100 is in the first position, the projection of the second through hole 2101 in the vertical direction does not overlap with the projection of the first through hole 2001 in the vertical direction (refer to Fig.16A ); when the seat plate 100 is in the second position, at least a portion of the projection of the second through hole 2101 in the vertical direction coincides with the projection of the first through hole 2001 in the vertical direction ( Fig.17A ). A second accommodating space 240 suitable for accommodating the safety belt 500 is formed between the seat plate 200 and the base 210. Therefore, when the seat plate 200 is in the first position, the safety belt passing through the first through hole 2001 and the second through hole 2101 will be folded, and the folded part of the safety belt 500 will be in the second accommodating space 240. Fig. 16B and Fig. 17B , where L1 represents the height of the upper edge of the second through hole 2101 in the vertical direction, L2 represents the height of the upper edge of the first through hole 2001 in the vertical direction, and the dotted line represents the safety belt. Therefore, the dotted line portion above L2 is used to indicate the length of the safety belt passing through the first through hole 2001. Fig. 16B In the embodiment, the seat plate 200 is in the first position, the safety belt is folded in the front-to-back direction, and the length of the folded portion of the safety belt is d2, and the length of the safety belt passing through the first through hole 2001 is d3. Fig. 17B In the embodiment, the seat plate 200 is in the second position, the safety belt is not folded, and the length of the safety belt passing through the first through hole 2001 is d1. Therefore, d1=d2+d3. That is, when the seat plate 200 is in the first position, the length of the safety belt entering and passing through the first through hole 2001 is less than the length of the safety belt entering and passing through the first through hole 2001 when the seat plate 200 is in the second position. When the seat plate 200 is in the first position, the seat length is shorter and suitable for children with smaller bodies. Further, the length of the safety belt suitable for children with smaller bodies is also shorter. In addition, when the seat plate 200 slides from the first position to the second position, the position of the first through hole 203 also moves forward by a distance of d2, and drives the position of the crotch belt to move forward. That is, when the seat plate 200 slides from the first position to the second position, the distance between the crotch belt and the backrest increases by a length of d2 compared to when the seat plate 200 is in the first position, thereby leaving more riding space in the front-to-back direction for the crotch of a larger child. Therefore, the seat adjustment system 10 according to the embodiment of the present application can reduce the workload of shortening the seat belt when the seat 200 is in the first position, thereby increasing the usability of the child safety seat.

[0142] refer to Figures 18 to 20The embodiment of the present application further provides a child safety seat 1, comprising the seat adjustment system 10 in the aforementioned embodiment; and a backrest 20, the backrest 20 being detachably connected to the base 110, 210.

[0143] refer to Fig.19 In one embodiment, the base 110, 210 includes a snap-fitting groove 300, and the backrest 20 includes a snap-fitting portion 400, which is snap-fitted into the snap-fitting groove 300. Specifically, the snap-fitting portion 400 includes a locking tongue 401, which can slide in the front-back direction to switch between a locking position and a release position. In the locking position, the locking tongue slides into the snap-fitting groove 300 to be snap-fitted into the snap-fitting groove 300, and in the release position, the locking tongue 401 slides away from the snap-fitting groove 300 to be released from the snap-fitting groove 300. Optionally, the snap-fitting portion 400 also includes a fourth elastic member 2024, which makes the locking tongue 401 have a tendency to slide toward the snap-fitting groove 300. Preferably, the fourth elastic member 2024 is a coil spring. It should be understood by those skilled in the art that the coil spring is only exemplary, and the fourth elastic member 2024 can be any other suitable elastic element.

[0144] refer to Fig.19 In one embodiment, the front end of the lock tongue 401 is provided with a curved surface 4011. When pressure is applied to the curved surface 4011, the lock tongue 401 slides toward the unlocking position. During installation, the curved surface 4011 is pressed against the edge of the engaging groove 300, and the lock tongue 401 is pressed, and the lock tongue 401 slides toward the unlocking position. When the lock tongue 401 completely enters the engaging groove 300, under the action of the fourth elastic member 2024, the lock tongue 401 slides toward the engaging groove 300 to the locking position.

[0145] refer to Fig.19 and Fig. 20 In one embodiment, the base 110, 210 includes a connecting rod 310, which is disposed at the rear end of the base 110, 210. The backrest 20 includes a hook 410, which hooks the connecting rod 310 to engage with the connecting rod 310. The base 110, 210 also includes a reinforcing tube 320, which is disposed in the connecting rod 310 to improve the structural strength of the connecting rod. In addition, since the reinforcing tube 320 is connected to the base bracket, the connection strength of the backrest 20 is better. In some embodiments, the reinforcing tube and the base bracket are made of steel and are welded or tightly fitted together.

[0146] The following will be combined Fig.18 and Fig.19 , describing the installation and removal process of the backrest 20.

[0147] refer to Fig.18, the backrest 20 and the bases 110 and 210 are in a disassembled state. First, hook the hook 410 onto the connecting rod 310; then, rotate the backrest 20 with the connecting rod 310 as a pivot until the curved surface 4011 of the locking tongue 401 contacts the edge of the engaging groove 300; press the locking tongue 401 toward the engaging groove so that the locking tongue 401 retracts toward the unlocking position until the locking tongue 401 enters the engaging groove 300; under the action of the fourth elastic member 2024, the locking tongue 401 slides toward the engaging groove 300 to the locking position. At this point, the backrest 20 is installed.

[0148] refer to Fig.19 , the backrest 20 and the base 110, 210 are in the installed state. First, push the lock tongue 401 to the unlocking position; while keeping the lock tongue 401 at the unlocking position, rotate the backrest with the connecting rod 310 as the pivot; after the lock tongue 401 leaves the engaging groove 300, release the lock tongue 401; move the backrest in the opposite direction of the opening of the hook 410, and release the hook 410 from the connecting rod 310. At this point, the backrest 20 is completely disassembled.

[0149] In the child safety seat provided in the embodiment of the present application, the backrest can be conveniently and quickly installed and disassembled through the engagement of the engagement groove 300 and the engagement portion 400, and the hook portion 410 and the connecting rod 310, and the ease of use is high.

[0150] Reference Figure 9 to Figure 17. The present application also provides a seat adjustment system for a child safety seat 1, comprising a seat 200 and a base 210, wherein the seat 200 can move between a first position and a second position along a first direction relative to the base 210. The seat 200 also includes: an adjustment portion 202, a connection portion 201, and a first through hole 2001 for passing a crotch strap. The base 210 includes a second through hole 2101 for passing a crotch strap. The adjustment portion 202 can operably limit the movement of the seat 200 relative to the base 210 along the first direction, that is, the user can limit and release the movement of the seat 200 in the front-to-back direction by switching the operating member 2021 between the locking position and the adjustment position. The connection portion 201 limits the movement of the seat 200 relative to the base 210 along the second direction. The first direction is the front-to-back direction, and the second direction is the lateral direction, which is perpendicular to the first direction. When the seat plate 200 is in the first position, the projection of the second through hole 2101 in the vertical direction does not overlap with the projection of the first through hole 2001 in the vertical direction. At this time, the exposed length of the crotch strap is shorter, and the position where the crotch strap is exposed is close to the backrest, which is suitable for children with smaller bodies. When the seat plate 200 is in the second position, at least a part of the projection of the second through hole 2101 in the vertical direction overlaps with the projection of the first through hole 2001 in the vertical direction. At this time, the exposed length of the crotch strap is longer, and the position where the crotch strap is exposed is far away from the backrest, which is suitable for children with larger bodies. In this way, the length and position of the crotch strap can be adjusted while adjusting the length of the seat cushion of the child safety seat 1.

[0151] refer to Fig.21 and Fig. 22 , an embodiment of the present application further provides a child safety seat 6, comprising: a base 61 and a backrest 62 connected to the base 61. An armrest 610 is provided on the base 61. Optionally, the base 61 and the armrest 610 are an integral piece. Wings 620 extending from the backrest 62 are respectively provided on both lateral sides of the backrest 62. In some embodiments, the backrest 62 is pivotally connected to the base 61 to achieve an adjustable angle of the backrest 62. When the backrest 62 pivots relative to the base 61, the distance between the armrest 610 and the wing 620 also changes accordingly. In some other embodiments, the backrest 62 is detachably connected to the base 61 by pivoting or inserting. The wing 620 and the armrest 610 are independent components, and there is a gap between the wing 620 and the armrest 610 in the use state. In the case of a traffic accident such as emergency braking or a vehicle collision, the backrest 62, under the action of inertia, rotates forward with the connection between the backrest 62 and the base 61 as the rotation axis (that is, Figure 2 and Fig.11The backrest 62 is pivoted in the direction D1 shown in the figure, and the wing 620 will press against the armrest 610, so that the armrest 610 supports the backrest 62 to limit the backrest 62 from pivoting forward excessively. However, in actual use, if the user improperly installs the backrest 62 or the material hardness of the backrest 62 is insufficient, the wings 620 on both sides of the backrest 62 may be deformed under the combined action of the inertia of the backrest 62 pivoting forward and the supporting force provided by the armrest 610. Specifically, the wings 620 on both sides of the backrest 62 will deform toward the outside in the lateral direction, for example, the wings 620 on both sides of the backrest 62 will open outward or be misaligned with the contact surface of the armrest 610 in the lateral direction. At this time, the backrest 62 will continue to pivot forward, thereby causing the child sitting in the child safety seat 6 to bend and extend the head and neck of the child excessively forward under the pressure of the backrest 62. Under extreme conditions such as the vehicle seat spacing is too narrow, the child's head may touch the vehicle seat backrest in front. The term "toward the outside" in this application refers to the direction away from the child safety seat 6 in the lateral direction.

[0152] refer to Fig. 22 and Fig.23 In one embodiment of the present application, a first surface 611 is provided on the side of the armrest 610 facing the wing 620, and a second surface 621 is provided on the side of the edge of the wing 620 facing the armrest 610, and the first surface 611 and the second surface 621 are arranged opposite to each other. That is, when the backrest 62 moves forward (for example, pivots) due to an accident, the second surface 621 will press against the first surface 611 and contact the first surface 611. A limiting mechanism 630 is provided on the first surface 611 and the second surface 621, and the limiting mechanism 630 is configured to prevent the wing 620 from deforming in the lateral direction when the wing 620 presses the armrest 610, thereby preventing the backrest 62 from continuously moving forward, and ensuring the life safety of the child sitting in the child safety seat 6.

[0153] refer to Fig.24 and Fig.25In one embodiment, the limiting mechanism 630 includes: a positioning recess 631 provided on the first surface 611 and a first positioning protrusion 632 provided on the second surface 621. When the wing 620 presses the armrest 610, the first positioning protrusion 632 can be inserted into the positioning recess 631 to limit the deformation of the wing 620 in the lateral direction, thereby preventing the backrest 62 from continuously moving forward, and ensuring the life safety of the child sitting in the child safety seat 6. Optionally, in other embodiments, the positioning recess 631 and the first positioning protrusion 632 can also be provided in the opposite direction, that is, the positioning recess 631 is provided on the second surface 621, and the first positioning protrusion 632 is provided on the first surface 611. Optionally, the positioning recess 631 is provided as an elongated rectangular structure, and is recessed away from the first surface 611 or the second surface 621 where the positioning recess 631 is located. Optionally, the first positioning protrusion 632 is configured as an elongated rectangular structure that is similar in shape to the positioning recess 631 but slightly smaller in size, and protrudes away from the second surface 621 or the first surface 611 where the positioning recess 631 is located. In such an embodiment, the first positioning protrusion 632 is clearance-matched with the positioning recess 631. Optionally, the positioning recess 631 and the first positioning protrusion 632 can also be configured as other suitable shapes according to actual needs, for example, the positioning recess 631 is a fan-shaped or inverted trapezoidal shape whose width gradually narrows along the front-to-back direction, and the present application does not limit this.

[0154] refer to Fig.26 and Fig. 27In one embodiment, the limiting mechanism 630 includes: a second positioning protrusion 633 provided on the first surface 611, and a third positioning protrusion 634 provided on the second surface 621. Specifically, the second positioning protrusion 633 is provided on the outer side of the third positioning protrusion 634 in the transverse direction. When the wing 620 presses the armrest 610, the projections of the second positioning protrusion 633 and the third positioning protrusion 634 in the transverse direction at least partially overlap, thereby, the second positioning protrusion 633 can limit the movement of the third positioning protrusion 634 toward the outer side in the transverse direction, so as to limit the deformation of the wing 620 in the transverse direction, so as to prevent the backrest 62 from continuously moving forward, and ensure the life safety of the child sitting in the child safety seat 6. Optionally, in other embodiments, two second positioning protrusions 633 can be provided on the first surface 611, and the position of the third positioning protrusion 634 is set so that when the wing 620 presses the armrest 610, the third positioning protrusion 634 can enter the gap formed between the two second positioning protrusions 633, so as to limit the deformation of the wing 620 in the transverse direction. Optionally, in other embodiments, two third positioning protrusions 634 may be provided on the second surface 621, and the position of the second positioning protrusion 633 is set so that when the wing 620 presses the armrest 610, the second positioning protrusion 633 can enter the gap formed between the two third positioning protrusions 634 to limit the deformation of the wing 620 in the lateral direction. Specifically, the second positioning protrusion 633 and the third positioning protrusion 634 are set as long rectangular structures, and protrude away from the second surface 621 or the first surface 611 where the second positioning protrusion 633 and the third positioning protrusion 634 are located. Optionally, the second positioning protrusion 633 and the third positioning protrusion 634 can also be set to other suitable shapes according to actual needs, such as a fan-shaped or inverted trapezoidal shape whose width gradually narrows along the front-to-back direction, and the present application does not limit this.

[0155] refer to Fig.28 and Fig.29 In one embodiment, the limiting mechanism 630 includes: a friction member 635. The friction member 635 is arranged on at least one of the first surface 611 and the second surface 621. When the wing 620 presses the armrest 610, the friction member 635 provides a friction force that limits the lateral movement of the wing 620 relative to the armrest 610. This prevents the backrest 62 from continuously moving forward, thereby ensuring the life safety of the child sitting in the child safety seat 6. Optionally, the friction member 635 is a friction plate installed on the first surface 611 and / or the second surface 621, or the friction member 635 can be a rough surface formed on the first surface 611 and / or the second surface 621. The friction member 635 can select a suitable embodiment according to actual needs, as long as it can provide a friction force that limits the lateral movement of the wing 620 relative to the armrest 610.

[0156] refer to Fig.30 and Fig.31In one embodiment, the limiting mechanism 630 includes: at least two limiting ribs 636. The at least two limiting ribs 636 are arranged on one of the first surface 611 and the second surface 621, and are respectively located on both sides of the edge of the first surface 611 or the second surface 621 in the lateral direction. When the wing 620 presses the armrest 610 so that the first surface 611 contacts the second surface 632, the at least two limiting ribs 636 clamp the other of the first surface 611 and the second surface 621 to limit the lateral movement of the wing 620 relative to the armrest 610. In this way, the backrest 62 is prevented from continuously moving forward, and the life safety of the child sitting in the child safety seat 6 is guaranteed. Optionally, the at least two limiting ribs 636 are configured as ribs protruding toward the two sides of the armrest 610, so as to form at least a partial V-shaped or U-shaped space between the at least two limiting ribs 636. Optionally, the limiting mechanism 630 may further include a protrusion (not shown) disposed on the other of the first surface 611 and the second surface 621, the protrusion having a shape matching the space formed between the at least two limiting ribs 636, such as at least a partial V-shape or a U-shape. When the wing 620 presses the armrest 610, the protrusion may enter the space formed between the at least two limiting ribs 636, that is, the at least two limiting ribs 636 clamp the protrusion to limit the lateral movement of the wing 620 relative to the armrest 610.

[0157] In a child safety seat with ISOFIX (International Standards Organization FIX, child safety seat fixing system) known to the inventor, a release key for contacting the ISOFIX connector and a safety key for preventing the release key from being triggered by mistake are provided on the seat. If only the release key is pressed without pressing the safety key, the ISOFIX connector cannot be released, thereby preventing false triggering; after pressing the safety key and the release key at the same time, the ISOFIX connector is unlocked, thereby separating the child safety seat and the car. Among them, the unlocking direction of the safety key and the unlocking direction of the release key are on the same straight line or on two parallel straight lines, and the unlocking directions of the two are close to each other. In addition, since the release key and the ISOFIX connector are mostly rigidly connected, the front and rear position of the ISOFIX connector relative to the backrest of the child safety seat can be adjusted. Therefore, according to the child safety seat known to the inventor, the release key is usually set on the shell of the ISOFIX connector and moves forward and backward with the ISOFIX connector relative to the backrest.

[0158] See also Fig.32 , a child safety seat 7 according to an embodiment of the present invention comprises an ISOFIX safety release system 700. The ISOFIX safety release system 700 can be detachably connected to an ISOFIX interface (not shown) of a vehicle.

[0159] See also Figure 33-Figure 34 The ISOFIX safety release system 700 includes an ISOFIX connector 720, a first release device 710 and a second release device 730. The ISOFIX connector 720 can switch between a locked state and a released state. When the ISOFIX connector 720 is in the locked state, the ISOFIX connector 720 can be locked with the IOSFIX interface of the vehicle; when the ISOFIX connector 720 is in the released state, the ISOFIX connector 720 can be separated from the IOSFIX interface of the vehicle. The first release device 710 is operably connected directly or indirectly to the ISOFIX connector 720 to operate the ISOFIX connector 720 to release the lock. The first release device 710 includes a first release operating part 712. The first release operating part 712 can slide between a locked position and a released position. When the first release operating part 712 switches from the locked position to the released position, the first release device 710 can switch the ISOFIX connector 720 from the locked state to the released state. The second release device 730 is operably connected to the first release device 710. The second release device 730 includes a second release operating part 7311. The second release operating part 7311 can slide between a safety position and a free position. When the second release operating part 7311 is in the safety position, the second release device 730 locks the first release operating part 712 in the locked position. The sliding direction of the first release operating part 712 is not parallel to the sliding direction of the second release operating part 7311. In this embodiment, the sliding direction of the first release operating part 712 is perpendicular to the sliding direction of the second release operating part 7311. Specifically, the first release operating part 712 slides along the longitudinal direction of the child safety seat 7, and the second release operating part 7311 moves along the transverse direction of the child safety seat 7, wherein the longitudinal direction refers to the direction in which the child faces when sitting in the child safety seat 7, and the transverse direction is a direction perpendicular to the longitudinal direction. For example, in some other embodiments, the sliding direction of the first unlocking operation part 712 intersects with the sliding direction of the second unlocking operation part 7311, for example, the sliding direction of the first unlocking operation part 712 switching from the locked state to the unlocked state and the sliding direction of the second unlocking operation part 7311 switching from the locked state to the unlocked state form an angle less than 45 degrees. In some other embodiments, the sliding direction of the first unlocking operation part 712 and the sliding direction of the second unlocking operation part 7311 are parallel and away from each other, for example, the sliding direction of the first unlocking operation part 712 switching from the locked state to the unlocked state is exactly opposite to the sliding direction of the second unlocking operation part 7311 switching from the locked state to the unlocked state.

[0160] Specifically, Fig.35 As shown, the first unlocking device 710 includes a first engaging portion 7120 and a second engaging portion 7125 connected to the first unlocking operating portion 712. Fig.35 In the embodiment, the first unlocking operation part 712 is in the locked position, and the second unlocking device 730 is in the safety position. The second unlocking device 730 has a third engaging part 7310. When the first unlocking operation part 712 is in the locked position, and the second unlocking operation part 7311 is in the safety position, the third engaging part 7310 cooperates with the first engaging part 7120 to lock the first unlocking operation part 712 in the locked position. In this embodiment, the first engaging part 7120 is a slot, and the third engaging part 7310 is a hook. Fig.43 As shown, when the first unlocking operation portion 712 is in the unlocking position and the second unlocking device 730 is in the free position, the third engaging portion 7310 cooperates with the second engaging portion 7125 to lock the first unlocking operation portion 712 in the unlocking position.

[0161] like Fig.33 and Fig.37 As shown, the first release operating part 712 includes a first pressing part 7121 for the user to push the first release operating part 712 to slide, and the first pressing part 7121 is a pressing surface substantially perpendicular to the sliding direction of the first release operating part 712. When the second release operating part 7311 is in the safety position, the side wall of the second release operating part 7311 blocks at least a part of the first pressing part 7121 to prevent the user from accidentally operating the first release operating part 712 before operating the second release operating part 7311; when the second release operating part 7311 is in the free position, the side wall of the second release operating part 7311 is separated from the first pressing part 7121, so that the first pressing part 7121 is exposed to the outside, so that the user can push the first pressing part 7121 by hand to slide the first release operating part 712.

[0162] like Fig.33As shown, the first unlocking device 710 includes a fixing seat 711. The fixing seat 711 is fixedly arranged on the child safety seat 7. When the ISOFOX connector 720 slides forward and backward in the longitudinal direction, the position of the fixing seat 711 does not change accordingly, so as to facilitate the operation of the user. A third accommodating space 7110 is defined inside the fixing seat 711, and the first unlocking operation part 712 is slidably arranged in the third accommodating space 7110, and can slide from the locking position to the unlocking position in a direction away from the second unlocking operation part 7311. When the user attempts to unlock the ISOFIX connector 720 with one hand, the user first presses the second unlocking operation part 7311 with the thumb in the direction close to the child safety seat, and presses the second unlocking operation part 7311 from the safety position to the free position; and then pushes the first unlocking operation part 712 in the direction away from the second unlocking operation part 7311 (thumb) with the index finger. Since the force that the hand muscles of a person can provide to push the index finger away from the thumb is much less than the force that pulls the index finger toward the thumb, it is difficult for the user to unlock the ISOFIX connector 720 with one hand, or to accidentally lock the seat by touching the first unlocking operation part 712 and the second unlocking operation part 7311 at the same time when adjusting the front-to-back distance of the ISOFIX connector 720 relative to the backrest. Therefore, it is effectively prevented that the child is accidentally unlocked when riding in the child safety seat. In other embodiments, the first unlocking operation part 712 can also slide from the locked position to the unlocked position along the direction close to the second unlocking operation part 7311.

[0163] like Fig.33 As shown, an observation window 7111 is provided on the side of the fixing seat 711 away from the child safety seat 7. The first pressing portion 7121 is located in the observation window 7111. The first unlocking operation portion 712 also includes a color indicator 7122 connected to the first pressing portion 7121. The color indicator 7122 can be marked as green, for example. When the first unlocking operation portion 712 is in the locked position, the color indicator 7122 is exposed in the observation window 7111, that is, it can be observed by the user, prompting the user that the ISOFIX connector 720 has been locked. By applying a thrust to the first pressing portion 7121, the first unlocking operation portion 712 slides from the locked position to the unlocked position. Fig.41 As shown, when the first unlocking operation portion 712 is in the unlocking position, the color indicator 7122 is shielded by the fixing seat 711, that is, it cannot be observed by the user, prompting the user that the ISOFIX connector 720 is in an unlocked state.

[0164] like Fig.35 , Fig.39 and Fig.43As shown, the first unlocking device 710 further includes a first guide member 7124 located at one end of the first unlocking operation portion 712 away from the second unlocking device 730. A second guide member 7112 is provided at a position of the fixing seat 711 corresponding to the first guide member 7124. The first guide member 7124 cooperates with the second guide member 7112 to guide the sliding of the first unlocking operation portion 712. In this embodiment, the first guide member 7124 is a second slide groove, and the second guide member 7112 is a pin that can slide in the second slide groove, but is not limited thereto.

[0165] like Fig.35 , Fig.39 and Fig.43 As shown, the second release device 730 includes a main body 731. The main body 731 has a limiting space 7312, and the limiting space 7312 is set between the third engaging portion 7310 and the second release operation portion 7311. When the second release operation portion 7311 is located at the safety position, a part of the first release operation portion 712 enters the limiting space 7312, so that the third engaging portion 7310 is matched with the first engaging portion 7120. When the second release operation portion 7311 is in the free position, the part of the first release operation portion 712 is disengaged from the limiting space 7312, so that the user can slide the first release operation portion 712 conveniently.

[0166] like Fig.35 , Fig.39 and Fig.43 As shown, the second unlocking device 730 also includes a fifth elastic member 732 connected to the second unlocking operating part 7311. The fifth elastic member 732 has a tendency to make the second unlocking operating part 7311 slide from the free position toward the safety position. In this embodiment, the fifth elastic member 732 is a spring. The third engaging portion 7310 has a first surface and a second surface relative to the first surface, wherein the first surface of the third engaging portion 7310 is a plane located in a direction away from the first unlocking device 710, and the second surface of the third engaging portion 7310 is a miter surface 73101, and the miter surface 73101 is located in a direction close to the first unlocking device 710. The second engaging portion 7125 is provided with a step surface 71251. Referring to Fig.35 As shown, when the second release device 730 is in the safety position and the first release operating portion 712 is in the locking position, the third engaging portion 7310 contacts the first surface of the first release device 710 through the first surface, locking the first release device 710 in the locking position. Fig.43As shown, when the second release device 730 is in the free position and the first release operating part 712 is in the release position, the miter surface 73101 abuts against the step surface 71251 (i.e., the second surface of the first release device 710), and under the action of the fifth elastic member 732, the third engaging portion 7310 limits the movement of the first release operating part 712 toward the direction of approaching the second release device 730, thereby locking the first release operating part 712 in the release position. Fig.47 , the first unlocking operation part 712 is located at the unlocking position. When the ISOFOX connector 720 abuts against the ISOFIX interface of the vehicle seat, the ISOFOX connector 720 switches to the locked state, and the second connecting member 740 pulls the first driving member 713 to rotate counterclockwise, thereby driving the first unlocking operation part 712 to slide leftward. Fig.43 , the step surface 71251 presses the miter surface 73101 to the left, causing relative sliding at the contact surface of the two, thereby releasing the lock between the step surface 71251 and the miter surface 73101, thereby the first unlocking operation part 712 slides from the unlocking position to the locking position, and the second unlocking operation part 7311 slides from the free position to the safety position. The length of the first surface of the first unlocking device 710 in a direction perpendicular to its sliding direction is greater than the length of the second surface in a direction perpendicular to its sliding direction, or the contact area between the first surface of the third engaging part 7310 and the first surface of the first unlocking device 710 is greater than the contact area between the second surface of the third engaging part 7310 and the second surface of the first unlocking device 710, so that when the first unlocking device 710 is locked in the unlocking state, it can be easily driven by the ISOFOX connector 720 to switch to the multi-locking state. In this embodiment, the first lock releasing device 710 is not provided with an elastic member for resetting the first lock releasing operating part 712 from the unlocking position to the locking position, and the first lock releasing operating part 712 is reset by pulling the steel wire, thereby simplifying the structure of the first lock releasing device 710. In other embodiments, an elastic member may also be provided on the first lock releasing device 710, and the elastic member biases the first lock releasing operating part 712 from the unlocking position toward the locking position, thereby making it easier for the first lock releasing device 710 to be reset to the locking position.

[0167] See also Figure 44-Figure 47 The first unlocking device 710 further includes a first driving member 713. The first driving member 713 is pivotally disposed on the child safety seat 7. The ISOFIX connector 720 is operably connected to the first unlocking operation portion 712 via the first driving member 713.

[0168] Specifically, Fig.47As shown, the first driving member 713 includes a pivot shaft 7133 provided on the child safety seat 7 and a first arm 7131 and a second arm 7132 located on both sides of the pivot shaft 7133. The first arm 7131 is operably connected to the first unlocking operation portion 712, and the second arm 7132 is operably connected to the ISOFIX connector 720. The length of the first arm 7131 is greater than the length of the second arm 7132, thereby reducing the force required to unlock the ISOFIX connector 720 through the first unlocking operation portion 712.

[0169] like Fig.47 and Fig.49 As shown, the first unlocking operation part 712 further includes a pivoting space 7123. The first arm 7131 is rotatably disposed in the pivoting space 7123. The sliding of the first unlocking operation part 712 can drive the first arm 7131 to rotate around the pivot axis 7133.

[0170] like Figure 47-Figure 50 As shown, the ISOFIX safety release system 700 also includes a second connecting member 740. One end of the second connecting member 740 is fixedly connected to the second arm 7132, and the other end of the second connecting member 740 is fixedly connected to the ISOFIX connector 720. The second arm 7132 is operably connected to the ISOFIX connector 720 through the second connecting member 740. In this embodiment, the second connecting member 740 is a steel wire, but is not limited to this, and can also be a connecting rod, etc. When the ISOFIX connector 720 switches from the released state to the locked state, the second connecting member 740 can also drive the first release operating part 712 to slide from the released position to the locked position. In addition, the first driving member 713 also acts as a steering gear. As shown Fig.47 As shown, when the first unlocking operation part 712 moves from the locking position to the unlocking position, that is, slides from the left side of the figure to the right side, driving the first driving member 713 to rotate clockwise, the second arm 7132 pulls the steel wire 740 from right to left, thereby changing the transmission direction of the movement, making the unlocking sliding direction of the user more natural. Through the pivoting structure of the first driving member 713 and the transmission method of the steel wire, the first unlocking operation part 712 can be set at a position away from the ISOFIX connector 720, so as to facilitate the operation of the user.

[0171] like Fig.45 , Fig.48 and Fig.50As shown, the ISOFIX connector 720 includes a housing 7201, a bracket 7202, a second driving member 7203, a second engaging member 7204, a hook 7205, a stopper 7206, a sixth elastic member 7207, and a seventh elastic member 7208. The housing 7201 is generally in the shape of an elongated strip, and the bracket 7202 is disposed inside the housing 7201. A second slide groove 72021 is defined inside the bracket 7202. The second driving member 7203 is slidably disposed in the second slide groove 72021. The second driving member 7203 is also operably connected to the first unlocking operating portion 712 through the second connecting member 740 and the first driving member 713. The second engaging member 7204 is fixedly connected to the second driving member 7203. The hook 7205 is pivotally fixed to the bracket 7202 through a pin 72054, and is disposed in the second slide groove 72021. The hook 7205 can pivot between a connection position and a release position. The stopper 7206 is fixedly connected to the bracket 7202. One end of the sixth elastic member 7207 is connected to the stopper 7206, and the other end of the sixth elastic member 7207 is connected to the second driving member 7203. The sixth elastic member 7207 is used to make the second driving member 7203 have a movement tendency to slide in a direction away from the child safety seat 7. The seventh elastic member 7208 is provided on the pin 72054, and is used to make the hook 7205 have a tendency to rotate from the connection position to the release position. In this embodiment, the seventh elastic member 7208 is a torsion spring. The hook 7205 has a boss 72051. The boss 72051 has a first surface 72052 that abuts against the second engaging member 7204, and the boss 72051 also has a second surface 72053 adjacent to the first surface 72052. The second surface 72053 is used to contact the second driving member 7203. The second driving member 7203 is provided with a third surface 72032 for contacting the second surface 72053. The second surface 72053 and the third surface 72032 have substantially the same curvature. When the second surface 72053 and the third surface 72032 are in contact, the second surface 72053 can slide relative to the third surface 72032.

[0172] The working process of the ISOFIX safety release system 700 is briefly described below.

[0173] like Fig.47 , Fig.48 As shown, when the ISOFIX connector 720 is in the locked state, the ISOFIX connector 720 can be locked with the IOSFIX interface of the vehicle. At this time, the first unlocking operation part 712 is in the locked position, and the second unlocking operation part 7311 is in the safety position. The side wall of the second unlocking operation part 7311 blocks at least a part of the first pressing part 7121, so that children cannot easily operate the first pressing part 7121. Fig.35As shown, when the second unlocking operation part 7311 is located at the safety position, a part of the first unlocking operation part 712 enters the limiting space 7312, so that the third engaging part 7310 cooperates with the first engaging part 7120 to lock the first unlocking operation part 712 in the locked position, thereby preventing a child from operating the first unlocking operation part 712. In addition, when the IOSFIX connector 720 enters the locked state, the hook 7205 pivots to the connection position, and the second driving member 7203 slides in a direction away from the child safety seat 7 under the action of the sixth elastic member 7207 until the second engaging member 7204 abuts against the hook 7205, restricting the pivoting of the hook 7205, so as to lock the hook 7205 in the connection position, thereby locking the IOSFIX connector 720 in the locked state.

[0174] When the ISOFIX connector 720 needs to be unlocked, the second unlocking operation portion 7311 can be pressed first. When the second unlocking operation portion 7311 is in a free position, the side wall of the second unlocking operation portion 7311 is separated from the first pressing portion 7121, so that the first pressing portion 7121 is exposed to the outside, so that the user can operate the first pressing portion 7121 by hand. At this time, the part of the first unlocking operation portion 712 is separated from the limiting space 7312, and the third engaging portion 7310 is separated from the first engaging portion 7120, that is, the first unlocking operation portion 712 is no longer locked in the unlocking position. When the first pressing portion 7121 is operated to slide from the locked position to the unlocking position in a direction away from the second unlocking operation portion 7311, the sliding of the first unlocking operation portion 712 can drive the first arm 7131 of the first driving member 713 to rotate around the pivot shaft 7133, thereby driving the second arm 7132 of the first driving member 713 to pull the second connecting member 740. The second driving member 7203 of the ISOFIX connector 720 slides in the second slide groove 72021 toward the child safety seat 7 under the pull of the second connecting member 740, and the second engaging member 7204 disengages from the hook 7205 and no longer restricts the pivoting of the hook 7205. Under the action of the seventh elastic member 7208, the hook 7205 rotates from the connecting position to the releasing position. At this time, the ISOFIX connector 720 is in the unlocked state, so it can be separated from the ISOFIX interface of the vehicle.

[0175] The ISOFIX safety release system 700 of one or more of the above embodiments has the following partial technical effects:

[0176] 1. After adjusting the second unlocking operation part 7311 to the free position, slide the first unlocking operation part 712 to the unlocking position to prevent users or children from accidentally unlocking the door.

[0177] 2. The unlocking directions of the second unlocking operation portion 7311 and the first unlocking operation portion 712 are orthogonal, which can effectively reduce the probability of false touches compared to the design in the prior art where the sliding directions of the second unlocking operation portion and the first unlocking operation portion are parallel or on the same straight line.

[0178] 3. The first unlocking operation part 712 is locked by the second unlocking operation part 7311 in both the locked position and the unlocked position. The first unlocking operation part 712 is locked by the second unlocking operation part 7311 in the locked position to prevent accidental unlocking due to misoperation. The first unlocking operation part 712 is locked by the second unlocking operation part 7311 in the unlocked position to keep the ISOFIX connector 720 in the unlocked state, which facilitates the installation of the child safety seat and simplifies the structure of the ISOFIX system.

[0179] 4. The color indicator device 7122 reveals a color indication in the locked position and hides the color indication in the unlocked state, so that the user can easily understand the current locking state of the ISOFIX connector 720.

[0180] 5. The first driving member 713 enables the first unlocking operation portion 712 to be released by sliding in a direction away from the ISOFIX hook 7205 , which is the same as the disassembly direction of the ISOFIX connector, facilitating operation.

[0181] 6. The first driving member 713 can adjust the stroke of the unlocking operation portion by changing the length ratio of the first arm 7131 and the second arm 7132. A longer stroke can better prevent accidental touch.

[0182] 7. The first driving member 713 allows the first unlocking operating portion 712 to be arranged at a different height from the ISOFIX connector 720, so as to flexibly arrange the position of the first unlocking operating portion 712 for easy operation.

[0183] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0184] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A seat adjustment system for a child safety seat, characterized in that: The seat plate adjustment system comprises: a seat plate, the seat plate being provided with at least one first connection portion; and a base, the base being provided with at least one second connection portion cooperating with the at least one first connection portion, the seat plate being slidably connected to the base through the cooperation between the first connection portion and the second connection portion, The seat plate is further provided with a first adjustment portion, and the base is further provided with a second adjustment portion and a third adjustment portion. The first adjustment portion cooperates with the second adjustment portion so that the seat plate is locked in the first position, and the first adjustment portion cooperates with the third adjustment portion so that the seat plate is locked in the second position. wherein the seat plate can be locked and slid relative to the base between a first position and a second position, and when the seat plate is in the first position, the seat length of the child safety seat is smaller than the seat length of the child safety seat when the seat plate is in the second position, the first connecting portion is a connecting column, the connecting column is fixedly arranged on a side of the seat plate facing the base, and the second connecting portion is a first connecting groove, the first connecting groove is arranged on a side of the base facing the seat plate, and the first connecting groove passes through a side of the base facing the seat plate, the first connecting groove extends in a front-to-back direction of the base, the connecting column is inserted in the first connecting groove, and can slide back and forth along the length direction of the first connecting groove, and a first stop is provided at one end of the connecting column away from the seat plate, the first stop is detachably fixed to one end of the connecting column away from the seat plate, and the size of the first stop is set to prevent it from passing through the first connecting groove.

2. The seat plate adjustment system according to claim 1, characterized in that: The first adjusting portion is an adjusting column, and the adjusting column is fixedly arranged on the side of the seat plate facing the base. The second adjusting portion is a first adjusting hole, and the third adjusting portion is a second adjusting hole, wherein the position of the first adjusting hole is set as follows: when the seat plate slides to the first position, the adjusting column can be inserted into the first adjusting hole to fix the seat plate in the first position; when the seat plate is lifted upward, the adjusting column is disengaged. The cam is disengaged from the first adjustment hole so that the seat plate is released from the first position, and the position of the second adjustment hole is set as follows: when the seat plate slides to the second position, the adjustment post can be inserted into the second adjustment hole so that the seat plate is fixed in the second position; the seat plate is lifted upward, and the adjustment post disengages from the second adjustment hole so that the seat plate is released from the second position, and the length of the first adjustment portion is shorter than the length of the first connecting portion, wherein a first recess is formed on the front end of the base toward the side of the seat plate, and the first recess is formed by the side of the base facing the seat plate being recessed in a direction away from the seat plate, and the first recess forms an operating space between the front end of the seat plate and the front end of the base.

3. A seat adjustment system for a child safety seat, characterized in that:

14. The seat adjustment system of claim 13, wherein the seat plate is provided with at least one first connection portion; and a base, wherein the base is provided with at least one second connection portion that cooperates with the at least one first connection portion, wherein the seat plate is slidably connected to the base through cooperation between the first connection portion and the second connection portion, wherein the seat plate is further provided with a first adjustment portion, and the base is further provided with a second adjustment portion and a third adjustment portion, wherein the first adjustment portion cooperates with the second adjustment portion so that the seat plate is locked in a first position, and the first adjustment portion cooperates with the third adjustment portion so that the seat plate is locked in a second position, wherein the seat plate is lockably slidable relative to the base between the first position and the second position, and the seat plate is in the first position when the seat plate is The seat length of the child safety seat is smaller than the seat length of the child safety seat when the seat plate is in the second position, the first connecting portion is a convex strip, the convex strip is fixedly arranged on the side of the seat plate facing the base, the convex strip extends in the front-to-back direction of the seat plate, the second connecting portion is a second connecting groove, the second connecting groove is arranged on the side of the base facing the seat plate, and the second connecting groove is recessed in the direction away from the seat plate, the second connecting groove extends in the front-to-back direction of the base, the convex strip is embedded in the second connecting groove, the convex strip is slidable along the second connecting groove, and the seat plate slides in the front-to-back direction of the base by sliding the convex strip in the second connecting groove.

4. The seat plate adjustment system according to claim 3, characterized in that: The seat plate is defined with a first accommodating space inside, the first adjustment portion is at least partially disposed in the first accommodating space, the first adjustment portion comprising: an operating member, the operating member being able to slide between a locking position and an adjusting position; and a first engaging member, the first engaging member being operably connected to the operating member, wherein the first engaging member is able to slide between an extended position and a retracted position, the first engaging member being adapted to engage with the second adjusting portion and the third adjusting portion, and when the seat plate is in the first position, the operating member is slid to the locking position, so that the first engaging member slides to the extended position, the first engaging member engages with the second adjusting portion, and the seat plate is fixed to the first position; the operating member is slid to the adjusting position, so that the first engaging member slides to the retracted position, the first engaging member disengages from the second adjusting portion, and the seat plate is released from the first position; when the seat plate is in the second position, the operating member is slid to the locking position, so that the first engaging member slides to the extended position, the first engaging member engages with the second adjusting portion, and the seat plate is released from the first position. A clamping member is engaged with the third adjustment portion, and the seat plate is fixed to the second position; the operating member is slid to the adjustment position, so that the first clamping member slides to the retracted position, the first clamping member is disengaged from the third adjustment portion, and the seat plate is released from the second position, wherein a limiting groove is provided on the operating member, and a limiting convex portion cooperating with the limiting groove is provided in the first accommodating space, the limiting groove extends in the front-to-back direction of the base, the cooperation between the limiting groove and the limiting convex portion at least defines a first limit position of the operating member, the first limit position corresponds to the locking position of the operating member, the cooperation between the limiting groove and the limiting convex portion also defines a second limit position of the operating member, the second limit position corresponds to the adjustment position of the operating member, the first adjustment portion also includes a first connecting member, one end of the first connecting member is fixedly connected to the operating member, the other end of the first connecting member is fixedly connected to the first clamping member, the first connecting member is a flexible connecting strip, and the first connecting member is integrated with the operating member.

5. A child safety seat, comprising: Base; and a backrest, wherein the backrest is detachably connected to the base, characterized in that the base includes a locking groove, the backrest includes a locking portion, and the locking portion is locked in the locking groove, wherein the base also includes a connecting rod, the connecting rod is arranged at the rear end of the base, the backrest includes a hook portion, the hook portion hooks the connecting rod to engage with the connecting rod, the locking portion includes a locking tongue, and the locking tongue can slide in the front-to-back direction to switch between a locked position and a released position, in which the locking tongue slides into the locking groove to be engaged in the locking groove, and in the released position, the locking tongue slides in a direction away from the locking groove to disengage from the locking groove and release the lock from the locking groove, and the locking portion also includes a fourth elastic member, and the fourth elastic member enables the locking tongue to have a tendency to slide toward the locking groove.

6. The child safety seat according to claim 5, characterized in that: The base further includes a reinforcing tube, and the reinforcing tube is arranged in the connecting rod.

7. A seat adjustment system for a child safety seat, characterized in that: The invention comprises a seat plate and a base, wherein the seat plate can move between a first position and a second position along a first direction relative to the base, wherein the seat plate further comprises: an adjustment portion, which can operably limit the seat plate to move relative to the base along the first direction; a connection portion, which limits the seat plate to move relative to the base along a second direction, wherein the second direction is perpendicular to the first direction; and a first through hole, which is used to pass a crotch strap, wherein the base comprises a second through hole, which is used to pass a crotch strap, when the seat plate is in the first position, the projection of the second through hole in the vertical direction does not coincide with the projection of the first through hole in the vertical direction, and the length of the crotch strap passing through the first through hole is a first length; when the seat plate is in the second position, at least a part of the projection of the second through hole in the vertical direction coincides with the projection of the first through hole in the vertical direction, and the length of the crotch strap passing through the first through hole is a second length, and the first length is less than the second length, wherein a gap is formed between a side of the front end of the base facing the seat plate and a side of the front end of the seat plate facing the base, and the gap is suitable for the crotch strap to pass through.

8. A child safety seat, comprising: A base provided with an armrest; and a backrest, wherein the armrest is provided with a first surface on one side facing the backrest, and the backrest is provided with a second surface on one side facing the armrest, the first surface is arranged opposite to the second surface, and a limiting mechanism is arranged on at least one of the first surface and the second surface, and the limiting mechanism is configured to provide resistance to hinder the second surface from sliding laterally relative to the first surface when the first surface contacts the second surface, the backrest is provided with a wing portion, the second surface is arranged at the wing portion, a gap is provided between the wing portion and the armrest, and the first surface and the second surface are respectively located on both sides of the gap, wherein the limiting mechanism includes: a positioning recess, which is arranged on one of the first surface and the second surface; and a first positioning protrusion, which is arranged on the other of the first surface and the second surface, wherein when the wing portion contacts the armrest, the first positioning protrusion is inserted into the positioning recess to limit the wing portion from moving laterally relative to the armrest, the width of the positioning recess in the lateral direction is greater than the width of the first positioning protrusion in the lateral direction, and when the first positioning protrusion is inserted into the positioning recess, the first positioning protrusion is matched with the positioning recess gap.

9. An ISOFIX safety release system for a child safety seat, the ISOFIX safety release system comprising: ISOFIX connector, which can be switched between locked and released states; a first release device, operably connected to the ISOFIX connector; The first unlocking device comprises a first unlocking operating part, the first unlocking operating part can slide between a locking position and a unlocking position, and when the first unlocking operating part switches from the locking position to the unlocking position, the first unlocking device switches the ISOFIX connector from the locked state to the unlocking state; and a second release device operably connected to the first release device; The second release device includes a second release operating part, which can slide between a safety position and a free position. When the second release operating part is in the safety position, the second release device locks the first release operating part in the locked position, wherein the first release device includes a first engaging part and a second engaging part connected to the first release operating part, wherein the second release device has a third engaging part, when the first release operating part is in the locked position and the second release operating part is in the safety position, the third engaging part cooperates with the first engaging part to lock the first release operating part in the locked position; when the first release operating part is in the release position and the second release device is in the free position, the third engaging part cooperates with the second engaging part to lock the first release operating part in the release position, wherein the sliding direction of the first release operating part is not parallel to the sliding direction of the second release operating part.

10. The ISOFIX safety release system according to claim 9, characterized in that: The sliding direction of the first release operating part is perpendicular to the sliding direction of the second release operating part, and the first release operating part slides from the locked position to the release position along a direction away from the second release operating part, wherein the first release operating part includes a first pressing part for pushing the first release operating part to slide, and when the second release operating part is in the safety position, the side wall of the second release operating part blocks at least a part of the first pressing part; when the second release operating part is in the free position, the side wall of the second release operating part is separated from the first pressing part so that the first pressing part is exposed to the outside.

11. The ISOFIX safety release system according to claim 9, characterized in that: The second release device has a limiting space, which is arranged between the third engaging portion and the second release operating portion. When the second release operating portion is located in the safety position, a portion of the first release operating portion enters the limiting space so that the third engaging portion cooperates with the first engaging portion; when the second release operating portion is in the free position, the portion of the first release operating portion disengages from the limiting space, wherein the third engaging portion has a miter surface, and the second engaging portion is provided with a step surface. When the second release device is in the free position and the first release operating portion is in the release position, the miter surface abuts against the step surface. Under the action of the fifth elastic member, the third engaging portion limits the movement of the first release operating portion toward the direction close to the second release device, thereby locking the first release operating portion in the release position.

12. The ISOFIX safety release system according to claim 9, characterized in that: The first release device also includes a first driving member, which is pivotally arranged on the child safety seat, and the ISOFIX connector is operably connected to the first release operating part through the first driving member, wherein the first driving member includes a pivot shaft arranged on the child safety seat and a first arm and a second arm located on both sides of the pivot shaft, the first arm is operably matched with the first release operating part, the second arm is operably matched with the ISOFIX connector, the length of the first arm is greater than the length of the second arm, and the ISOFIX safety release system also includes a second connecting member, one end of the second connecting member is fixedly connected to the second arm, the other end of the second connecting member is fixedly connected to the ISOFIX connector, the second arm is operably connected to the ISOFIX connector through the second connecting member, and the second connecting member is a flexible connecting member.

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