Headrest assembly and child safety seat

Abstract

The utility model relates to a headrest assembly and a child safety seat. The headrest assembly comprises a headrest supporting part and a headrest side wing part. The headrest supporting part is provided with a head supporting surface; the headrest side wing part is connected with the side part of the headrest supporting part, a first convex part is arranged on the inner side of the headrest side wing part, the first convex part is provided with a first surface far away from the head supporting surface and a second surface close to the head supporting surface, and the first surface is inclined towards the direction close to the headrest side wing part from back to front; therefore, the head of the child is prevented from being hurt when the child is laterally impacted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of infant products, in particular to a headrest assembly and a child safety seat. BACKGROUND

[0002] A child safety seat, also known as a child restraint system (CRS), is a child safety protection system specially designed for children of different ages (or weights) and capable of being fixed on a motor vehicle, which is composed of a buckle-equipped safety belt assembly or a flexible component, an adjusting mechanism, accessories, etc. The child safety seat improves the safety of children when riding in a vehicle by providing appropriate restraint to prevent children from coming into harmful contact with the internal components of the vehicle. Frontal and side collisions constitute the main causes of accidents resulting in child death or serious injury. SUMMARY

[0003] To solve the above problems, according to an aspect of the present application, a headrest assembly is provided, which comprises a headrest support part and a headrest side wing part. The headrest support part has a head support surface; the headrest side wing part is connected to the side of the headrest support part, wherein an inner side of the headrest side wing part is provided with a headrest first protruding part, the headrest first protruding part has a first surface away from the head support surface and a second surface close to the head support surface, and the first surface is arranged to be inclined towards the direction of the headrest side wing part from back to front.

[0004] In an embodiment, the included angle between the first surface and the second surface is greater than 90 degrees and less than 150 degrees.

[0005] In an embodiment, the included angle between the first surface and the front-rear direction is greater than 30 degrees and less than 90 degrees; or the included angle between the extension surface of the first surface and the head support surface is greater than the included angle between the extension surface of the second surface and the head support surface.

[0006] In an embodiment, the thickness of the headrest side wing part corresponding to the first surface gradually decreases from back to front.

[0007] In an embodiment, the headrest side wing part is provided with a buffer layer made of elastic material, wherein the thickness of the buffer layer corresponding to the first surface gradually decreases from back to front; or the thickness of the buffer layer corresponding to the second surface gradually decreases from front to back.

[0008] In an embodiment, the first surface is a plane or an outward convex cylindrical surface.

[0009] In an embodiment, the first surface has an anti-slip pattern.

[0010] In an embodiment, the second surface is located at the rear of the transverse center line L1 of the headrest side wing.

[0011] In an embodiment, the first surface is located at the rear of the transverse center line L1 of the headrest side wing.

[0012] In an embodiment, the vertical height of the headrest first protrusion is less than the vertical height of the headrest side wing, and a vertical center plane of the headrest side wing passes through the headrest first protrusion.

[0013] In an embodiment, the intersection of the first surface and the second surface forms an edge line, and the thickness of the headrest side wing corresponding to the edge line is greater than the thickness of the headrest side wing at the first surface.

[0014] In an embodiment, the horizontal distance between the edge line and the head support surface is greater than 20 mm and less than 60 mm.

[0015] In an embodiment, the headrest first protrusion is detachably mounted on the headrest side wing; or,

[0016] The headrest assembly further comprises a head protection block having a first end and a second end, the headrest first protrusion being located at the first end; the head protection block is arranged on the headrest side wing and is movable between a first use position and a second use position; when the head protection block is located at the first use position, the first end protrudes from the inner side of the headrest side wing; when the head protection block is located at the second use position, the second end protrudes from the outer side of the headrest side wing.

[0017] In an embodiment, the inner side of the headrest side wing is further provided with a headrest second protrusion, and the headrest first protrusion and the headrest second protrusion form a stepped structure in the front-rear direction.

[0018] In an embodiment, a groove is formed between the headrest first protrusion and the headrest second protrusion, and an elastic buffer is arranged in the groove, the density of the elastic buffer being less than the density of the headrest first protrusion.

[0019] In an embodiment, at least a part of the first surface is covered with an elastic buffer, the elastic buffer being a sponge, and the material of the headrest first protrusion being at least one of foamed polyethylene, foamed polystyrene, and a composite material composed of foamed polyethylene and polystyrene.

[0020] In an embodiment, the second surface is connected to the head support surface, and the included angle between the second surface and the head support surface is an acute angle; or the second surface is connected to the inner side of the headrest side wing, and the included angle between the second surface and the inner side of the headrest side wing is an acute angle.

[0021] In an embodiment, the head support surface has an anti-slip pattern, and the friction coefficient of the head support surface is greater than that of the first surface.

[0022] In an embodiment, the headrest first protrusion is formed by stacking two or more cushioning materials, and the density of the cushioning material corresponding to the first surface is less than that of the cushioning material corresponding to the second surface.

[0023] In an embodiment, the length of the second surface is less than that of the first surface.

[0024] According to yet another aspect of the present application, there is provided a headrest assembly, comprising: a rigid layer forming an accommodation space for accommodating a child's head, the accommodation space having a horizontal opening; and a cushioning layer disposed on the rigid layer and inside the accommodation space, the cushioning layer having a pair of headrest first protrusions protruding towards the inside of the accommodation space; the headrest first protrusion having a first surface and a second surface connected to the first surface, the first surface being closer to the horizontal opening than the second surface, wherein the first surface is arranged to be inclined away from the direction of the accommodation space from back to front.

[0025] In an embodiment, the angle between the first surface and the second surface satisfies greater than 90 degrees and less than 150 degrees; or the angle between the first surface and the front-rear direction satisfies greater than 30 degrees and less than 90 degrees; or

[0026] The angle formed between the extension of the first surface and the head support surface is greater than the angle formed between the extension of the second surface and the head support surface.

[0027] In an embodiment, the thickness of the cushioning layer corresponding to the first surface gradually decreases from back to front.

[0028] In an embodiment, the second surface is located at the rear of the lateral center line L of the headrest side wing.

[0029] In an embodiment, the first surface is located at the rear of the lateral center line L1 of the headrest side wing.

[0030] In an embodiment, the headrest first protrusion is detachably mounted on the cushioning layer or the rigid layer.

[0031] In an embodiment, the density of the cushioning layer is less than that of the headrest first protrusion.

[0032] In an embodiment, the headrest first protrusion is an integral part of the cushioning layer.

[0033] In an embodiment, the intersection of the first surface and the second surface forms an edge line, and the thickness of the cushioning layer corresponding to the edge line is greater than that of the cushioning layer corresponding to the first surface or the second surface at the same horizontal plane.

[0034] In an embodiment, the first surface is a plane or an outward convex cylindrical surface, and / or the second surface is a plane or an outward convex cylindrical surface, and / or the length of the second surface is less than the length of the first surface.

[0035] According to yet another aspect of the present application, there is provided a headrest assembly, comprising: a headrest support portion and two headrest side wing portions respectively connected to the support portion at left and right sides, inner sides of the headrest side wing portions are provided with a cushion layer, the cushion layer has a first region and a second region; the second region is located closer to the headrest support portion than the first region. Wherein the indentation hardness of the second region is greater than the indentation hardness of the first region.

[0036] In an embodiment, the indentation hardness of the cushion material constituting the first region is less than the indentation hardness of the cushion material constituting the second region.

[0037] In an embodiment, the cushion layer of the first region is stacked by a first cushion material layer and a second cushion material layer, wherein the second cushion material layer is located at the inner side of the headrest side wing portion, the indentation hardness of the cushion material constituting the first cushion material layer is less than the indentation hardness of the cushion material constituting the second cushion material layer.

[0038] In an embodiment, the inner side of the headrest side wing portion is a plane or a concave surface.

[0039] According to yet another aspect of the present application, there is provided a headrest assembly, comprising: a headrest support portion having a head portion support surface; and two headrest side wing portions respectively connected to the support portion at left and right sides, one of the two headrest side wing portions has a first inner side surface, and the other has a second inner side surface, wherein the first inner side surface and the second inner side surface are respectively provided with a headrest first convex portion at an end away from the head portion support surface; a receiving space is formed between the first inner side surface, the second inner side surface and the head portion support surface, and the receiving space has a horizontally inwardly recessed opening.

[0040] In an embodiment, the headrest first convex portion has a first surface and a second surface, and the included angle between the first surface and the second surface is greater than or equal to 90 degrees.

[0041] In an embodiment, a groove portion is respectively formed between the head portion support surface and each of the headrest first convex portions, and an elastic cushion member is arranged in the groove portion.

[0042] According to yet another aspect of the present application, there is provided a child safety seat. The child safety seat comprises a seat body, and a headrest assembly according to any one of the first to fourth aspects of the present application, wherein the headrest assembly is mounted to the seat body.

[0043] According to yet another aspect of the present application, a child safety seat is provided, which includes a seat portion, a backrest portion connected to the seat portion, and two seat wing portions respectively connected to left and right sides of the backrest portion. The child safety seat further includes a side impact protection block protruding from the seat wing portions, wherein each of the seat wing portions has a first region corresponding to a child's hip, a second region corresponding to a child's shoulder, and a third region between the first region and the second region, the second region being located higher than the first region, and wherein the side impact protection block is located on at least one of an outer side of the first region, an inner side of the first region, an outer side of the second region, an inner side of the second region, an outer side of the third region, or an inner side of the third region.

[0044] In an embodiment, the side impact protection block includes two seat first protrusions located on the inner side of the first region, the two seat first protrusions respectively protruding from inner sides of the two seat wing portions to clamp the child's hip.

[0045] In an embodiment, the seat first protrusions are mounted on the inner sides of the seat wing portions, or the seat first protrusions are mounted on the seat portion and adjacent to lower ends of the seat wing portions, or the seat first protrusions are mounted on the backrest portion and adjacent to lower ends of the seat wing portions.

[0046] In an embodiment, the seat first protrusions have engaging portions, and the seat first protrusions are detachably connected to the seat wing portions through the engaging portions.

[0047] In an embodiment, the child safety seat further includes a sheet-shaped holding portion, and the two seat first protrusions are connected to left and right sides of the holding portion to form a seating space.

[0048] In an embodiment, the child safety seat further includes a headrest assembly connected at the backrest portion, and a recess is formed between the seat first protrusions, the seat wing portions, and the headrest assembly to form an avoidance space.

[0049] In an embodiment, the seat first protrusions have first surfaces away from the backrest portion, and the first surfaces are inclined downward from top to bottom toward the backrest portion.

[0050] In an embodiment, the seat first protrusions are made of at least one of polypropylene, high-density polyethylene, foamed polyethylene, foamed polystyrene, and a composite material of foamed polyethylene and polystyrene.

[0051] In an embodiment, the first region is located below a horizontal center line L2 of the seat wing portion, and / or the second region is located above the horizontal center line L2 of the seat wing portion.

[0052] In an embodiment, the side impact protection block further comprises two seat second protrusions, the seat second protrusions being cushion pads, wherein the seat second protrusions are located at the inner side of the second region, the inner side of the third region, or the inner sides of the second region and the third region.

[0053] In an embodiment, the seat second protrusions are detachably mounted at the inner side of the seat side wing portion; or the child safety seat further comprises a headrest assembly connected at the backrest portion; the seat second protrusions are detachably mounted at a lower portion of the headrest assembly.

[0054] In an embodiment, the indentation hardness of the seat second protrusions is less than the indentation hardness of the seat first protrusions; or the density of the seat second protrusions is less than the density of the seat first protrusions.

[0055] In an embodiment, the thickness of the seat second protrusions is less than the thickness of the seat first protrusions.

[0056] In an embodiment, the distance between the two seat second protrusions is greater than the distance between the two seat first protrusions.

[0057] In an embodiment, the material of the seat second protrusions is at least one of sponge, foamed polyethylene, foamed polystyrene, and a composite material of foamed polyethylene and polystyrene.

[0058] In an embodiment, the side impact protection block further comprises a seat third protrusion protrudingly disposed at the outer side of the seat side wing portion; wherein the seat third protrusion is located above the seat first protrusion.

[0059] In an embodiment, the front end of the seat side wing portion is located at the outer side of the seat third protrusion, and a third distance D3 is provided between the seat third protrusion and the front end of the seat side wing portion.

[0060] In an embodiment, the seat third protrusion is located at the outer side of the third region, and the geometric center of the seat third protrusion is located below the horizontal center line L2 of the seat side wing portion; the seat third protrusion is located at the rear side of the seat first protrusion and is adjacent to the backrest portion.

[0061] According to another aspect of the present application, there is provided a child safety seat, comprising a seat portion, a backrest portion, and a pair of seat side wing portions, the inner side of each of the two seat side wing portions being stepped and having a first surface and a second surface located above the first surface, respectively, wherein the first surface protrudes from the second surface. The first surface is the inner side of the seat first protrusion, and the second surface is the inner side of the second region and the third region.

[0062] In an embodiment, a first distance D1 is provided between the two first surfaces, a second distance D2 is provided between the two second surfaces, and the first distance D1 is 8-16 centimeters less than the second distance D2.

[0063] In an embodiment, the first distance is 10 to 20 cm and the second distance is 22 to 40 cm.

[0064] In an embodiment, the second surface is provided with an elastic buffer.

[0065] According to another aspect of the present application, there is provided a seat cushion for a child carrier, the seat cushion comprising a seat cushion main body portion and seat cushion side wing portions connected to left and right sides of the seat cushion main body portion, characterized in that the seat cushion side wing portions comprise a pair of first seat cushion side wing portions and a pair of second seat cushion side wing portions positioned below the first seat cushion side wing portions, the second seat cushion side wing portions having a thickness greater than that of the first seat cushion side wing portions.

[0066] In an embodiment, the second seat cushion side wing portions have a greater indentation strength than the first seat cushion side wing portions; or the second seat cushion side wing portions have a greater density than the first seat cushion side wing portions. BRIEF DESCRIPTION OF DRAWINGS

[0067] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and are incorporated herein for a purpose of explanations. The present application is explained by using exemplary embodiments thereof and the drawings, and is not intended to limit the present application.

[0068] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0069] In addition, the drawings are not drawn in a 1:1 ratio, and the relative sizes of the various elements are only exemplarily drawn in the drawings, but not necessarily drawn in a true ratio. In the drawings:

[0070] Figure 1 a headrest assembly for a child safety seat is shown;

[0071] Figure 2 a cross-sectional view of the headrest assembly in Figure 1 along the H0-H0 line is shown;

[0072] Figures 3a to 3c a schematic diagram of the headrest assembly in Figure 1 undergoing a side impact process is shown;

[0073] Figure 4 a child safety seat having a headrest assembly is shown;

[0074] Figure 5 a perspective view of the headrest assembly of an embodiment of the present application is shown;

[0075] Figure 6 shows an exploded view of the headrest assembly in Figure 5 ;

[0076] Figure 7 shows a cross-sectional view of the headrest assembly in Figure 5 along line H1-H1;

[0077] Figure 8 shows a cross-sectional view of the headrest assembly in Figure 5 along line H2-H2;

[0078] Figure 9a shows a further cross-sectional view of the headrest assembly in Figure 5 along line H2-H2;

[0079] Figure 9b shows a further cross-sectional view of the headrest assembly in Figure 5 along line H2-H2;

[0080] Figures 10a to 10c shows a schematic view of the headrest assembly in Figure 5 undergoing a side impact event;

[0081] Figure 11 shows a perspective view of a headrest assembly according to an embodiment of the application;

[0082] Figure 12 shows a cross-sectional view of the headrest assembly in Figure 11 along line H3-H3;

[0083] Figure 13 shows a perspective view of a headrest assembly according to an embodiment of the application;

[0084] Figure 14 shows a cross-sectional view of the headrest assembly in Figure 13 along line H4-H4;

[0085] Figure 15 shows a perspective view of a headrest assembly according to an embodiment of the application;

[0086] Figure 16 shows a cross-sectional view of the headrest assembly in Figure 15 along line H5-H5;

[0087] Figure 17 shows a perspective view of a headrest assembly according to an embodiment of the application;

[0088] Figure 18 shows a cross-sectional view of the headrest assembly in Figure 17 along line H6-H6;

[0089] Figure 19perspective view of a headrest assembly according to an embodiment of the application;

[0090] Figure 20 a cross-sectional view of the headrest assembly shown in Figure 19 along line H7-H7;

[0091] Figure 21 perspective view of a headrest assembly according to an embodiment of the application;

[0092] Figure 22 a cross-sectional view of the headrest assembly shown in Figure 21 along line H8-H8;

[0093] Figure 23 perspective view of a headrest assembly according to an embodiment of the application;

[0094] Figure 24 an exploded view of the headrest assembly shown in Figure 23 ;

[0095] Figure 25a a cross-sectional view of the headrest assembly shown in Figure 23 along line H9-H9 with the head protection block in the second use position;

[0096] Figure 25b a cross-sectional view of the headrest assembly shown in Figure 23 along line H9-H9 with the head protection block in the first use position;

[0097] Figure 26 perspective view of a child safety seat according to an embodiment of the application;

[0098] Figure 27 an exploded view of the child safety seat shown in Figure 26 ;

[0099] Figure 28 front view of the child safety seat shown in Figure 26 ;

[0100] Figure 29 side view of the child safety seat shown in Figure 26 ;

[0101] Figure 30 top view of the child safety seat shown in Figure 26 ;

[0102] Figure 31 cross-sectional view of the child safety seat shown in Figure 26 ;

[0103] Figure 32 area schematic of the child safety seat shown in Figure 26 ;

[0104] Figure 33a and Figure 33b shows a front view schematic of a child safety seat in Figure 28 undergoing a side impact process;

[0105] Figure 34a and Figure 34b shows a top view schematic of a child safety seat in Figure 30 undergoing a side impact process;

[0106] Figure 35 shows a perspective view of a child safety seat according to an embodiment of the present application;

[0107] Figure 36 shows an exploded view of a child safety seat according to Figure 35

[0108] Figure 37 shows a cross-sectional view of a first protrusion according to Figure 35

[0109] Figure 38 shows a perspective view of a child safety seat according to an embodiment of the present application;

[0110] Figure 39 shows an exploded view of a child safety seat according to Figure 38

[0111] Figure 40 shows a cross-sectional view of a first protrusion according to Figure 38

[0112] Figure 41 shows a perspective view of a child safety seat according to an embodiment of the present application;

[0113] Figure 42 shows a front view of a child safety seat according to Figure 41

[0114] Figure 43 shows an exploded view of a child safety seat according to Figure 41

[0115] Figure 44 shows a front view of a seat cushion according to Figure 41 Reference Signs:

[0116] 10, child safety seat; 100, seat body; 110, seat portion; 120, backrest portion; 130, seat wing portion; 130a, inner side of seat wing portion; 130b, outer side of seat wing portion; 131, first connection portion; 132, groove;

[0117]

[0118] ​​​​​​​20, child head; 21, child; 200, headrest assembly; 210, rigid layer; 211, headrest support part; 2111, head support surface; 212, headrest side wing part; 220, cushion layer; 220a, first inner side surface; 220b, second inner side surface; 221, headrest first protrusion; 2211, first surface; 2212, second surface; 2213, ridge line; 2214, end surface; 215, headrest male buckle; 225, headrest female buckle; 222, headrest second protrusion; 2221, third surface; 2222, fourth surface; 223, flat surface part; 230, cushion protrusion; 240, elastic cushion member; 250, head protection block; 250a, first end; 250b, second end;

[0119] 30, intrusion structure; 300, side impact protection block; 310, seat part first protrusion; 311, engaging part; 312, retaining part; 320, seat part second protrusion; 330, seat part third protrusion;

[0120] 400, seat cushion; 410, seat cushion main body part; 420, seat cushion side wing piece;

[0121] 500, elastic cushion member;

[0122] S1, accommodation space; S2, avoidance space;

[0123] L1, headrest side wing part projection center line; L2, seat side wing part horizontal center line;

[0124] α, first included angle between head support surface; β, included angle between first surface and second surface; γ, included angle between first surface and front-rear direction;

[0125] A1, first region; A2, second region; A3, third region;

[0126] t1, thickness of headrest side wing part; t2, thickness of cushion layer;

[0127] D1, first distance; D2, second distance; D3, third distance. DETAILED DESCRIPTION

[0128] Figure 1 and Figure 2 A headrest assembly 200 known to the inventor is shown. Referring to Figure 1 , the headrest assembly 200 includes a headrest support part 211 extending in a left-right direction and headrest side wing parts 212 connected to the side of the headrest support part 211 and extending to the side front. Optionally, two headrest side wing parts 212 are provided, respectively connected to the left and right sides of the headrest support part 211. The headrest support part 211 is used to support the neck and head of a child, and the two headrest side wing parts 212 are used to protect the child's head from side impact injury. Please refer toFigure 2 , Figure 2 for Figure 1 The image shows a cross-sectional view of the headrest assembly 200 taken along the H0-H0 line, which passes through the middle of the headrest assembly 200 at its vertical height. The headrest support portion 211 and the headrest side wing portion 212 are formed by bonding two layers together. The outer layer is a rigid layer 210 made of plastic, constituting the shell of the headrest assembly 200; the inner layer is a cushioning layer 220 made of a foamed soft elastic material such as polypropylene, constituting the liner of the headrest assembly 200. The surface of the cushioning layer 220 at the headrest support portion 211 is a flat plane, and the surface of the cushioning layer 220 at the headrest side wing portion 212 is a flat plane or a concave surface. Optionally, a headrest cover made of a skin-friendly fabric material (not shown in the figure) is also fitted over the cushioning layer 220. The cushioning layer 220 at the headrest side wing portion 212 and the cushioning layer 220 at the headrest side wing portion 212 are either integral parts or separate parts. The thickness of the buffer layer 220 at the headrest side wing 212 is approximately 2 to 4 times the thickness of the buffer layer 220 at the headrest support 211, to enhance resistance to side impacts. Unless otherwise specified in this manual, the direction perpendicular to the support surface of the headrest support 211 is defined as the front-rear direction, the direction perpendicular to the horizontal plane is defined as the vertical direction (also called the up-down direction), and the direction orthogonal to the front-rear and vertical directions is defined as the left-right direction. The direction in which the child's eyes are looking when using the safety seat is defined as the front (front side) in the front-rear direction, and the direction opposite to the front is defined as the rear (rear side) in the front-rear direction; the side of the rigid layer 210 and the buffer layer 220 closest to the child's head is defined as the inner side, and the side furthest from the child's head is defined as the outer side.

[0129] Please see the appendix Figures 3a to 3c When a vehicle carrying a child safety seat 10 is struck by a vehicle from the left side of the diagram, the impacting vehicle or intrusion structure 30 enters the passenger compartment from the left and compresses the left headrest side wing 212 of the child safety seat 10 at high speed. Figure 3a The diagram shows the intrusion structure 30 during a side impact, impacting the vehicle from left to right and beginning to compress the left head-side wing 212. Figure 3b The headrest wing 212 is shown to move to the left under the push of the intrusion structure 30, and the buffer layer 220 on the inner side of the headrest wing 212 begins to compress the child's head 20. Figure 3c This illustrates how a child's head 20, pushed by the headrest wing 212, is accelerated from a resting state to have the same velocity as the headrest wing 212. Figures 3a to 3b The total duration of the impact process is approximately 200 milliseconds. During the collision between the child's head 20 and the headrest flank 212 (see... Figure 3b and Figure 3c), the child's head 20 extrudes the cushioning material inside the headrest side wing 212, so that the cushioning material is concave due to elastic deformation, to prolong the acceleration time of the child's head 20, thereby reducing the acceleration of the child's head 20 during the collision, avoiding injury to the child. By Figure 3c It can be seen that, in the process of the child's head 20 extruding the cushioning material of the headrest side wing 212, the child's head 20 sinks into the concave part of the cushioning material, and there is basically no relative rolling or sliding with the surface of the cushioning material. Figure 3c The dashed area in

[0130] It should be noted that, Figure 1 Fig. 3 is a child safety seat device known only to the inventor, and does not mean that the device belongs to the prior art.

[0131] Figure 4 A child safety seat 10 is shown, which is suitable for being mounted on a carrier body of a movable baby carrier, which can be a car seat of a car, a handle frame of a baby stroller, and of course, other carriers suitable for being mounted and combined with the child safety seat 10. The child safety seat 10 includes but is not limited to a baby basket, a sleeping box, etc. The child safety seat 10 can be mounted on different carrier bodies according to different application occasions, so as to broaden the application environment of the child safety seat 10 with the headrest assembly 200 of the embodiment.

[0132] Please refer to Figure 4 , the child safety seat 10 comprises a headrest assembly 200 and a seat body 100 for carrying and fixing the child's body. The headrest assembly 200 is slidably connected to the seat body 100 in the vertical direction. The headrest assembly 200 of the embodiment and the seat body 100 can be connected through the setting of a sliding groove, a sliding rail, etc. to realize the lifting adjustment of the headrest assembly 200 relative to the seat body 100, so as to cope with the body shape of infants and young children of different age stages. The sliding connection structure of the headrest assembly 200 and the seat body 100 is not limited here. The seat body 100 comprises a seat portion 110, a backrest portion 120 and a pair of seat headrest side wings 130.

[0133] Please refer to Figures 5 to 10c An embodiment of the present application provides a headrest assembly 200. As Figure 5 and Figure 6As shown, the headrest assembly 200 includes a rigid layer 210 and a cushion layer 220 disposed inside the rigid layer 210. The rigid layer 210 can be a hard shell made of a rigid material such as polypropylene (PP) to maintain the shape of the headrest assembly 200. The cushion layer 220 can be made of one or more of an elastic material such as expandable polyethylene (EPE), expanded polypropylene (EPP), expandable polystyrene (EPS), expandable polyolefins (EPO), etc., and mitigates the impact of a collision on the child's head 20 by elastically deforming. The rigid layer 210 has a headrest support portion 211 for supporting the child's head 20 and a pair of headrest side wing portions 212 connected to the ends of the headrest support portion 211 on opposite sides. The cushion layer 220 attached to the headrest support portion 211 and / or the headrest side wing portions 212 of the rigid layer 210 also forms part of the headrest support portion 211 and / or the headrest side wing portions 212. The front side of the headrest support portion 211 is formed with a head support surface 2111 for supporting the child's head 20, which is the surface of the cushion layer 220 facing the child's head 20. The headrest side wing portions 212 extend outward in the front direction relative to the headrest support portion 211. In addition, the head support surface 2111 is formed with a head support surface protrusion 2111a above, and the head support surface 2111 extends in the left-right direction to limit the movement range of the child's head 20.

[0134] Referring to Figure 6 and Figure 7 , the cushion layer 220 is detachably fixed to the surface of the rigid layer 210 via the cooperation between the headrest male buckle 215 provided on the rigid layer 210 and the pair of headrest female buckles 225 provided on the cushion layer 220. In the present embodiment, the rigid layer 210 is a double-layer hollow structure formed by splicing two plastic shell assembly pieces front and back. The cushion layer 220 is a one-piece member, including a portion covering the inner side surface of the headrest support portion 211 and a portion covering the inner side surfaces of the two headrest side wing portions 212. In other embodiments, the rigid layer 210 can be a single-layer structure formed by one shell, and the cushion layer 220 can include multiple independent elastic cushion members, for example, the cushion layer 220 is two independent cushion members, covering only the inner side surfaces of the two headrest side wing portions 212. This is not limited.

[0135] Figure 8 , Figure 9a and Figure 9b are Figure 5A sectional view taken along the line H2-H2, the plane of the line H2-H2 passing through the geometric center of the headrest assembly in the vertical direction. See Figure 8 The headrest support portion 211 and the pair of headrest side wing portions 212 together enclose a U-shaped accommodation space S1 for accommodating a child's head, the opening of the accommodation space S1 facing forward. When a child is seated in the child safety seat 10, the child's head is completely accommodated in the accommodation space S1, the rear of the head can abut against the head support surface 2111 of the headrest support portion 211, and the sides of the head are located between the two headrest side wing portions 212, so as to protect the child's head from side impact (see Figure 10a ). In addition, since the left headrest side wing portion 212 and the right headrest side wing portion 212 are mirror-symmetrical, only one side of the headrest side wing portion 212 will be described below.

[0136] The headrest first protrusion 221 is provided on the cushion layer 220 at the inner side of the headrest side wing portion 212. The headrest first protrusion 221 is made of elastic cushion material, and in the present embodiment, the headrest first protrusion 221 is integrally formed with the cushion layer 220. In other embodiments, the headrest first protrusion 221 can be fixed to the cushion layer 220 or the rigid layer 210 by insertion or gluing, without being particularly limited. The headrest first protrusion 221 has a first surface 2211 facing away from the head support surface 2111 in the front-rear direction, a second surface 2212 abutting against the head support surface 2111, and two end surfaces 2214 at the upper and lower ends, respectively. The rear end of the first surface 2211 is connected to the front end of the second surface 2212, and the front end of the first surface 2211 is located at the front end of the headrest side wing portion 212. The rear end of the second surface 2212 is connected to the head support surface 2111. The upper and lower ends of the first surface 2211 and the second surface 2212 are connected to the two end surfaces 2214, respectively. The first surface 2211 is located at the front side of the first surface 2211, i.e., the first surface 2211 is closer to the opening of the accommodation space than the first surface 2211. The first surface 2211 is arranged to be inclined from rear to front, away from the accommodation space S1, so that the opening of the accommodation space S1 has an outwardly expanding shape. The first surface 2211 and the second surface 2212 are substantially planar, and the ridge line 2213 of the headrest first protrusion 221 constitutes the boundary between the first surface 2211 and the second surface 2212, the first surface 2211 and the second surface 2212 being located at the front side and the rear side of the ridge line 2213 in the front-rear direction, respectively.

[0137] Please refer to Figures 10a to 10cWhen a side impact occurs, the child's head 20 will first collide with the second surface 2212. Accordingly, the second surface 2212 provides a force to the rear side (occiput) of the child's head 20 to rotate the child's head 20, so that the child's head 20 rotates along the edge line 2213 as the rotational axis after colliding with the second surface 2212, and then the front side of the child's head 20 hits the first surface 2211, thereby reducing the acceleration of the head in the left-right direction. The first surface 2211 and the second surface 2212 have an included angle less than 180 degrees to provide a space S2 for head rotation in front of the first surface 2211, and the speed of head rotation is adjusted by the included angle. Details will be described below.

[0138] Referring to Figure 9b , the first surface 2211 and the second surface 2212 have an included angle β, and the included angle β is less than 180 degrees, thereby forming a space S2 for head rotation between the front of the first surface 2211 and the child's head. The size of the space S2 can be represented by the included angle between the extension of the first surface 2211 and the second surface 2212, or by the included angle γ between the first surface 2211 and the straight line L2 in the front-rear direction. In the present embodiment, the included angle β can be selected between 90 degrees and 150 degrees. When the included angle β satisfies more than 90 degrees, the thickness of the buffer layer 220 corresponding to the second surface 2212 is thicker, which can provide higher compression resistance; when the included angle β satisfies less than 150 degrees, the space S2 can be increased, the rotation time of the child's head is prolonged, and the acceleration of the child's head in the left-right direction is reduced. Exemplarily, in the present embodiment, the included angle between the extension of the first surface 2211 and the head support surface 2111 is about 40 degrees, and the included angle β between the first surface 2211 and the straight line L2 in the front-rear direction is 50 degrees, the included angle between the second surface 2212 and the first surface 2211 is about 135 degrees, and the included angle α between the second surface 2212 and the head support surface 2111 is about 95 degrees. In the present embodiment, the first surface 2211 and the second surface 2212 are both flat surfaces, and in some embodiments, the first surface 2211 or the second surface 2212 is irregularly shaped, such as a cylindrical surface, an ellipsoidal surface, etc., and the included angle between the first surface 2211 and the second surface 2212 can be the included angle at the cross section passing through the midpoint of the headrest assembly 200 in the vertical height, such as the included angle β of Figure 9b .

[0139] In addition, the thickness of the buffer layer 220 corresponding to the edge line 2213 is greater than the thickness of the buffer layer 220 corresponding to the first surface 2211 and the second surface 2212. For example, referring to Figure 9bOn the same horizontal plane, the thickness t2 of the buffer layer 220 corresponding to the ridge 2213 is greater than the thickness of the buffer layer 220 of the first surface 2211 or the second surface 2212 at the same vertical height. For example, the thickness t1 of the headrest side wing 212 (including the buffer layer and the rigid layer) corresponding to the ridge 2213 is greater than the thickness of the headrest side wing 212 corresponding to the first surface 2211 or the second surface 2212. Exemplarily, the thickness t2 of the buffer layer 220 corresponding to the ridge 2213 of the headrest first protrusion 221 satisfies a value greater than 20 mm and less than 60 mm. Optionally, the second surface 2212 (including the ridge line 2213) is located behind the centerline L1 of the entire head-side wing 212 (i.e., behind the rear half of the head-side wing 212 in the front-rear direction), so that when the head collides with the second surface 2212, the force exerted by the second surface 2212 on the child's head does not pass through the center of gravity of the head, and the position of the center of gravity of the child's head can be regarded as being located at... Figure 10a The force direction of the second surface 2212 can be considered to originate from the contact point between the child's head 20 and the second surface 2212 and extend in a direction perpendicular to the second surface 2212. In some embodiments, the second surface 2212 is located on the rear side of the head-side wing 212 in the rear third of the front-rear direction to further increase the torque of the force and increase the initial rotational velocity. In still other embodiments, the second surface 2212 is located on the rear side of the head-side wing 212 in the rear fourth of the front-rear direction, thereby further enabling the head of a younger child to still rotate after colliding with the second surface. In other embodiments, the first surface 2211 may also be a convex cylindrical surface protruding towards the receiving space. The curvature of the convex cylindrical surface can reduce the rotational speed of the child's head 20 on the first surface 2211, preventing the child's head 20 from rotating too quickly and sliding out of the receiving space S1. Furthermore, the thicker buffer layer on the convex cylindrical surface provides better pressure resistance, preventing deformation of the buffer material caused by the head pressing against the first surface 2211, and preventing the head from prematurely sinking into the recess of the buffer material, resulting in insufficient rotation. Optionally, the thickness of the buffer layer 220 at the ridge 2213 is greater than the thickness of the buffer layer 220 at the front end of the first surface 2211, thereby forming an avoidance space S2 that allows the head to rotate after impacting the second surface 2212. In some other embodiments, the head rest first protrusion 221 is located in the rear half of the head rest side wing 212 in the front-back direction, that is, both the first surface 2211 and the second surface 2212 are located in the rear half of the head rest side wing 212 in the front-back direction. Optionally, the head support surface 2111 is a rough surface with anti-slip texture, and the coefficient of friction (roughness) of the head support surface 2111 is greater than the coefficient of friction (roughness) of the first surface 2211.

[0140] In the present embodiment, the headrest first protrusion 221 covers the entire inner side of the headrest side wing 212. In other embodiments, the headrest first protrusion 221 can only cover a portion of the inner side of the headrest side wing 212, as will be described in detail below.

[0141] Please refer to Figures 10a to 10b When the vehicle carrying the child safety seat 10 is subjected to a collision from the left side, the intruding structure 30 such as the vehicle or the door enters the passenger compartment from the left side and pushes the left side of the headrest side wing 212 of the headrest assembly 200 to the right (A). Figure 10a The headrest side wing 212 of the headrest assembly 200 moves to the right and collides with the relatively stationary child head 20 (B). Figure 10b Please refer to Figure 10b and Figure 10c During the collision with the headrest side wing 212, the back of the child head 20 first collides with the second surface 2212 of the headrest first protrusion 221 provided on the left headrest side wing 212. The cushioning material at the second surface 2212 is compressed and deformed under the pressure of the back of the child head. Accordingly, the second surface 2212 exerts a force on the back of the child head 20 from left to right. Since the contact surface of the second surface 2212 with the child head is located at the rear side of the center of gravity, in other words, the direction of the force does not pass through the center of gravity of the head. Under the action of this force, the child head 20 rotates laterally along the edge line of the second surface 2212 with the cervical vertebrae (the rear end of the child head 20) as the axis. During the rotation, the child head 20 contacts the first surface 2211 and continues to roll along the first surface 2211 to alleviate the impact on the child head 20. In the present embodiment, the first surface 2211 of the left headrest side wing 212 extends from the edge line 2213 at the rear side of the middle line L1 to the front end of the headrest side wing 212, and by providing a longer guiding length, the rotation speed of the child head 20 is reduced, thereby avoiding the child head 20 from being thrown out of the accommodation space S1 due to excessive rotation, or the cervical vertebrae being sprained due to excessive rotation.

[0142] The second surface 2212 (including the ridge line 2213) protrudes more toward the accommodation space S1 than other parts of the inner side of the headrest side wing 212, and is the first to be contacted by the child's head 20 when the child's head 20 contacts the headrest side wing 212. The second surface 2212 is located at the rear of the middle line L1 of the headrest side wing 212, and the force applied by the second surface 2212 to the child's head during a collision does not pass through the center of gravity of the child's head, so the child's head 20 can be guided to roll during a collision, thereby reducing the acceleration of the child's head 20 in the left-right direction and protecting the child. Since the first surface 2211 and the second surface 2212 have an included angle β, an avoidance space S2 for head rotation is formed in front of the first surface 2211, so that the head can be rotated into the avoidance space S2 after colliding with the second surface 2212. The first surface 2211 is inclined away from the accommodation space from back to front, forming an outwardly inclined slope, so as to guide the head to continue rolling on the first surface 2211, thereby reducing the speed and amplitude of rolling and avoiding neck injury or the child's head 20 from leaving the accommodation space S1. In addition, the thickness of the cushion layer 220 at the first surface 2211 gradually decreases from back to front. Since the lateral acceleration of the head is greater when the head contacts the rear side of the first surface 2211 (i.e., the area close to the second surface 2212), a thicker cushion material can provide better cushioning and damping effect. When rolling to the front of the first surface 2211, the lateral acceleration of the head is smaller, and only a thin cushion material can avoid injury to the child. Therefore, it is beneficial to save the use of cushion material and improve the activity space and field of view of the child's head 20.

[0143] Referring to Figures 11 to 12 , according to an embodiment of the present application, a headrest assembly 200 is disclosed, which includes a headrest support portion 211 and two headrest side wings 212 connected to the headrest support portion 211. The inner side of the two headrest side wings 212 is composed of a cushion layer 220 made of cushion material. The structure of the headrest support portion 211 and the headrest side wing 212 is basically the same as the embodiment shown in the Figures 5 to 10c of the present application, and will not be described here.

[0144] In the present embodiment, the headrest support portion 211 has a head support surface 2111, one of the two headrest side wing portions 212 has a first inner side surface 220a formed on an inner surface thereof facing the accommodation space S1, and the inner surface of the other of the two headrest side wing portions 212 has a second inner side surface 220b facing the accommodation space S1. The first inner side surface 220a and the second inner side surface 220b are both located at the cushion layer 220 of the headrest side wing portion 212 and face each other. The head support surface 2111, the first inner side surface 220a, and the second inner side surface 220b enclose an accommodation space S1 for accommodating the child's head 20. When the child is seated in the safety seat, the first inner side surface 220a and the second inner side surface 220b are respectively located on the left and right sides of the child's head 20. When a side impact occurs, the child's head 20 contacts the first inner side surface 220a or the second inner side surface 220b of the cushion layer 220 and rolls over the first inner side surface 220a or the second inner side surface 220b, thereby protecting the child's head 20. Since the two headrest side wing portions 212 are mirror-symmetrical, the following description is given by way of example with respect to the headrest side wing portion 212 located on the left side in the drawing.

[0145] By way of example, the headrest side wing portion 212 on the left side has the first inner side surface 220a. The first inner side surface 220a includes a planar portion 223 and a headrest first protrusion 221 protruding from the planar portion 223. The headrest first protrusion 221 is disposed on the rear side of the middle line L1 of the headrest side wing portion 212, i.e., the side close to the headrest support portion 211. The headrest first protrusion 221 has a first surface 2211 away from the head support surface 2111 in the front-rear direction, a second surface 2212 adjacent to the head support surface 2111, and two end surfaces 2214 respectively located on the upper and lower portions. The thickness of the cushion layer 220 of the planar portion 223 is smaller than the thickness of the cushion layer 220 at the first surface 2211. Please refer to Figure 12 The angle between the first surface 2211 and the second surface 2212 of the headrest first protrusion 221 is about 120 degrees along the height middle line in the vertical direction. The first surface 2211 and the second surface 2212 are both located on the rear side of the middle line L1 of the headrest side wing portion 212, thereby achieving the effect of the headrest side wing portion 212 of the present application. Figures 5 to 10cThe embodiment shown forms a larger avoidance space S2 in front of the first surface 2211. The first surface 2211 and the second surface 2212 are arranged to be inclined in a direction away from the accommodation space S1 from back to front (i.e. inclined in the outward lateral direction). For example, the included angle between the second surface 2212 and the head support surface 2111 is about 110 degrees, i.e. the included angle between the second surface 2212 and the front-back direction is about 20 degrees, and the included angle between the first surface 2211 and the front-back direction is about 140 degrees. The included angle of the first surface 2211 with respect to the front-back direction is greater than the included angle of the second surface 2212 with respect to the front-back direction. Optionally, the surface of the planar portion 223 is a rough surface with anti-slip texture, so as to reduce the relative sliding of the child's head 20 when contacting the planar portion 223, and avoid the child's head 20 from being separated from the accommodation space S1 of the headrest assembly 200 or causing the neck to be excessively stretched forward.

[0146] When a lateral impact occurs, the child's head 20 first collides with the second surface 2212 of the headrest lateral wing portion 212, and the second surface 2212 applies a lateral force to the back side of the child's head 20, promoting the child's head 20 to rotate. After the child's head 20 rotates, the front side of the child's head 20 contacts the planar portion 223 of the headrest lateral wing portion 212 and stops contacting the second surface 2212. Compared with the headrest assembly 200 of the embodiment shown in FIG. 1, the child's head 20 can rotate a larger angle and has a smaller final speed when colliding with the planar portion 223, so as to avoid the child's head 20 from rolling along the surface of the planar portion 223 after contacting the planar portion 223, thereby causing the head to be excessively rotated and the child's neck to be sprained. Figures 5 to 10c Compared with the embodiment shown, in the embodiment, the child's head 20 can rotate a larger angle, and has a smaller final speed when colliding with the planar portion 223, so as to avoid the child's head 20 from rolling along the surface of the planar portion 223 after contacting the planar portion 223, thereby causing the head to be excessively rotated and the child's neck to be sprained. The right headrest lateral wing portion 212 has a second inner side 220b which is substantially the same as the first inner side 220a, and thus will not be described herein.

[0147] Referring to Figures 13 to 14 According to an embodiment of the present application, a headrest assembly 200 is disclosed. The headrest assembly 200 comprises a headrest support portion 211 and two headrest lateral wing portions 212 connected to the headrest support portion 211. The inner sides of the two headrest lateral wing portions 212 are formed by a cushion layer 220 made of cushion material. The structures of the headrest support portion 211 and the headrest lateral wing portions 212 are substantially the same as those of the headrest assembly 200 of the embodiment shown in FIG. 1, and thus will not be described herein. Figures 5 to 10c The structures of the headrest support portion 211 and the headrest lateral wing portions 212 are substantially the same as those of the headrest assembly 200 of the embodiment shown in FIG. 1, and thus will not be described herein.

[0148] In the present embodiment, the headrest support portion 211 has a head support surface 2111, one of the two headrest side wing portions 212 has a first inner side surface 220a formed on the inner surface thereof facing the accommodation space S1, and the inner surface of the other of the two headrest side wing portions 212 has a second inner side surface 220b facing the accommodation space S1. The first inner side surface 220a and the second inner side surface 220b are both located at the cushion layer 220 of the headrest side wing portion 212 and face each other. The head support surface 2111, the first inner side surface 220a, and the second inner side surface 220b enclose an accommodation space S1 for accommodating the head 20 of the child.

[0149] Referring to Figure 14 , a pair of cushion protrusions 230 are arranged on the cushion layer 220. The cushion protrusions 230 are detachably mounted at the angle between the headrest support portion 211 and the headrest side wing portion 212 and simultaneously abut against the headrest support portion 211 and the first inner side surface 220a or the headrest support portion 211 and the second inner side surface 220b, thereby preventing the cushion protrusions 230 from falling off when colliding with the head 20 of the child.

[0150] The material density of the cushion protrusions 230 is less than that of the cushion layer 220, so as to avoid insufficient avoidance space S2 due to the depression of the cushion layer 220 below the cushion protrusions 230. Alternatively, the indentation hardness of the cushion material constituting the cushion protrusions 230 is less than that of the cushion material constituting the cushion layer 220; or the cushion materials constituting the cushion protrusions 230 and the cushion layer 220 are the same but have different densities or thicknesses. Indentation hardness refers to the total force required to press a specified depth on the surface of a soft porous material under specified conditions using a standard instrument, usually expressed in Newton (N), and is used to characterize the hardness of the material. Generally, the higher the density of the same material, the greater the indentation hardness.

[0151] Referring to Figure 13 , the vertical height of the cushion protrusions 230 is half of the vertical height of the headrest side wing portion 212. The cushion protrusions 230 are arranged at the middle position of the cushion layer 220 in the height direction, and the middle line H4-H4 of the headrest side wing portion 212 in the height direction passes through the cushion protrusions 230, so that the cushion material can be reduced while being suitable for children of different ages. Each of the cushion protrusions 230 has a first surface 2211 away from the head support surface 2111 in the front-rear direction and a second surface 2212 adjacent to the head support surface 2111. The first surface 2211 is composed of two planes having different slopes in the front-rear direction, so as to enhance the indentation hardness of the first surface 2211 and avoid excessive depression of the first surface 2211 due to elastic deformation when the child's head 20 contacts the first surface 2211. The cushion protrusions 230 are located on the rear side of the middle line L1 of the headrest side wing portion 212, i.e., the first surface 2211 and the second surface 2212 are both arranged on the rear side of the middle line L1.

[0152] Referring to Figures 15 to 16 According to an embodiment of the present application, a headrest assembly 200 is disclosed.

[0153] The headrest assembly 200 comprises a headrest support portion 211 and two headrest side wing portions 212 connected to the headrest support portion 211. The inner side of the two headrest side wing portions 212 is formed by a cushion layer 220 made of cushion material. The structure of the headrest support portion 211 and the headrest side wing portions 212 is substantially the same as that of the embodiment shown in the accompanying drawings of the present application, and will not be described here again. Figures 5 to 10c

[0154] In the present embodiment, the headrest support portion 211 has a head support surface 2111, one of the two headrest side wing portions 212 has a first inner side surface 220a formed on the inner surface thereof and facing the accommodation space S1, and the inner surface of the other of the two headrest side wing portions 212 has a second inner side surface 220b facing the accommodation space S1. The first inner side surface 220a and the second inner side surface 220b are both located at the cushion layer 220 of the headrest side wing portion 212 and face each other. The head support surface 2111, the first inner side surface 220a and the second inner side surface 220b enclose an accommodation space S1 for accommodating the head 20 of the child. In view of the mirror symmetry of the two headrest side wing portions 212, the following description will be made by taking the headrest side wing portion 212 located on the left side in the drawing as an example.

[0155] Exemplarily, the headrest side wing portion 212 on the left side has the first inner side surface 220a. The first inner side surface 220a comprises a planar portion 223, a headrest first protruding portion 221 protruding from the planar portion 223, and a headrest second protruding portion 222 protruding from the planar portion 223. The headrest first protruding portion 221 is arranged at the end of the first side surface near the headrest support portion, and the headrest second protruding portion 222 is arranged at the end of the first inner side surface 220a near the opening of the accommodation space S1. The headrest first protruding portion 221 is located at the rear side of the middle line L1 of the headrest side wing portion 212, and the headrest second protruding portion 222 is located at the front side of the middle line L1 of the headrest side wing portion 212. The distance between the headrest second protruding portion 222 of the first inner side surface 220a of the headrest side wing portion 212 on the left side and the headrest second protruding portion 222 of the second inner side surface 220b of the headrest side wing portion 212 on the right side is smaller than the average distance between the first inner side surface 220a and the second inner side surface 220b, so that the opening of the accommodation space S1 is inwardly retracted in the left-right direction. The headrest first protruding portion 221 is used to make the head 20 of the child rotate when a lateral impact occurs, and the headrest second protruding portion 222 is used to limit the moving amplitude of the head 20 of the child in the front-rear direction when the head 20 rotates, so as to prevent the head 20 of the child from being separated from the accommodation space S1, or causing excessive extension or twisting of the neck.

[0156] ​The headrest first protrusion 221 is disposed at the end of the first inner side surface 220a close to the headrest support portion. The headrest first protrusion 221 has a first surface 2211 away from the headrest support surface 2111 in the front-rear direction and a second surface 2212 adjacent to the headrest support surface 2111. The headrest second protrusion 222 has a third surface 2221 close to the opening of the accommodation space S1 in the front-rear direction and a fourth surface 2222 close to the headrest support surface 2111. Exemplarily, the included angle between the third surface 2221 and the fourth surface 2222 is an acute angle less than 90 degrees. The thickness of the cushion layer 220 of the planar portion 223 is less than the thickness of the cushion layer 220 at the first surface 2211 and the second surface 2212. The headrest first protrusion 221 can refer to other embodiments of the present application, which will not be repeated here.

[0157] The headrest first protrusion 221 and the headrest second protrusion 222 have a groove therebetween, and the first surface 2211 of the headrest first protrusion 221, the fourth surface 2222 of the headrest second protrusion 222, and the planar portion 223 collectively constitute the inner wall of the groove. Optionally, the groove is filled with an elastic cushion member 240, so that the first inner side surface 220a of the headrest side wing portion 212 is substantially planar, thereby improving the comfort of use. The elastic cushion member 240 and the cushion layer 220 covered by the elastic cushion member 240 constitute a first region A1 of the first inner side surface 220a, and the cushion layer 220 at the second surface 2212 constitutes a second region A2 of the first inner side surface 220a. The indentation hardness of the first region A1 is less than the indentation hardness of the second region A2. In other words, the indentation hardness of the elastic cushion member 240 is less than the indentation hardness of the cushion layer 220. Optionally, the indentation hardness of the cushion material constituting the elastic cushion member 240 is less than the indentation hardness of the cushion material constituting the cushion layer 220; or the cushion materials constituting the elastic cushion member 240 and the cushion layer 220 are the same, but the density of the cushion material constituting the elastic cushion member 240 is less than the density of the cushion material constituting the cushion layer 220. The fourth surface 2222 is substantially perpendicular to the first inner side surface 220a, so as to avoid the elastic cushion member 240 sliding forward and disengaging when the head collides with the elastic cushion member 240.

[0158] Please refer to Figures 17 to 18 An embodiment of the present application provides a headrest assembly 200. The headrest assembly 200 includes a headrest support portion 211 and a pair of headrest side wing portions 212. The pair of headrest side wing portions 212 respectively have a first inner side surface 220a and a second inner side surface 220b. In view of the mirror symmetry of the headrest side wing portions 212 on both sides, the first inner side surface 220a of the headrest side wing portion 212 on the left side in the drawing is exemplarily described below.

[0159] The first inner side surface 220a includes a planar portion 223 and a headrest second protrusion 222 protruding from the planar portion 223, and the headrest second protrusion 222 is arranged at an end of the first inner side surface 220a close to the opening of the accommodation space S1. The headrest second protrusion 222 is located in front of the middle line L1 of the headrest side wing portion 212. The distance between the headrest second protrusion 222 of the first inner side surface 220a of the headrest side wing portion 212 on the left side and the headrest second protrusion 222 of the second inner side surface 220b of the headrest side wing portion 212 on the right side is less than the average distance between the first inner side surface 220a and the second inner side surface 220b, so that the opening of the accommodation space S1 is inwardly retracted in the left-right direction. The headrest second protrusion 222 is used to limit the amplitude of the child's head 20 moving in the front-rear direction when the child's head 20 rotates, so as to prevent the child's head 20 from being separated from the accommodation space S1 or causing excessive extension or twisting of the neck. The headrest second protrusion 222 has a third surface 2221 close to the opening of the accommodation space S1 in the front-rear direction and a fourth surface 2222 close to the head support surface 2111. The angle between the third surface 2221 and the fourth surface 2222 is an acute angle less than 90 degrees. The thickness of the cushion layer 220 of the planar portion 223 is less than the thickness of the cushion layer 220 at the first surface 2211 and the second surface 2212. The headrest second protrusion 222 can refer to other embodiments of the present application, and will not be described here.

[0160] When encountering an impact from the side, the child's head 20 first contacts and presses the planar portion 223 of the inner side surface (for example, the first inner side surface 220a) of the headrest side wing portion 212. The first inner side surface 220a is an inclined surface inclined outwardly relative to the front-rear direction, and the child's head 20 can roll or slide on the surface of the planar portion 223 in the direction of the opening of the accommodation space S1 during the pressing of the elastic cushion 240. When the child's head 20 slides to the headrest second protrusion 222, the fourth surface 2222 of the headrest second protrusion 222 abuts against the child's head 20 to avoid the child's head 20 from being separated from the accommodation space S1. The fourth surface 2222 is a rough surface with point-like anti-skid textures or anti-skid ribs, for example.

[0161] Referring to Figures 19 to 20 An embodiment of the present application provides a headrest assembly 200. The embodiment cancels the headrest first protrusion 221 on the basis of the embodiment shown in the Figures 15 to 16 The head support surface 2111 and each headrest second protrusion 222 form a groove portion, and the groove portion is provided with an elastic cushion 240. The headrest second protrusion 222 is located in front of the middle line L1 of the headrest side wing portion 212, and the middle line L1 passes through the elastic cushion 240. The indentation hardness of the elastic cushion 240 is lower than the indentation hardness of the headrest second protrusion 222. The structure of the headrest second protrusion 222 can refer to the Figures 15 to 16The embodiments shown and Figures 17 to 18 The embodiments shown and

[0162] When the child head 20 encounters an impact from the side, the child head 20 first contacts and presses the elastic buffer 240 of the inner side of the headrest side wing 212 (for example, the first inner side 220a). The first inner side 220a is an inclined surface inclined outward with respect to the front-rear direction, and the child head 20 can roll or slide on the surface of the elastic buffer 240 in a direction toward the opening of the accommodation space S1 during the pressing of the elastic buffer 240. When the child head 20 slides to the headrest second protrusion 222, the fourth surface 2222 of the headrest second protrusion 222 abuts the child head 20 to prevent the child head 20 from escaping from the accommodation space S1.

[0163] Referring to Figures 21 to 22 An embodiment of the present application provides a headrest assembly 200. The headrest assembly 200 is provided with a pair of headrest first protrusions 221 and a pair of headrest second protrusions 222 on the buffer layer 220. The headrest first protrusions 221 are located on the rear side of the middle line L1 of the headrest side wing 212, and the headrest second protrusions 222 are located on the front side of the middle line L1 of the headrest side wing 212. The middle line L1 passes through the groove formed between the headrest first protrusions 221 and the headrest second protrusions 222. The headrest first protrusions 221 are detachably installed at the angle between the headrest support portion 211 and the headrest side wing 212, and the headrest second protrusions 222 are detachably installed at the end of the headrest side wing 212 close to the opening side of the accommodation space S1, so that the opening of the accommodation space S1 is inwardly retracted.

[0164] Referring to Figures 23 to 25. One embodiment of this application provides a headrest assembly 200. The headrest assembly 200 further includes head protection blocks 250. Multiple head protection blocks 250 are respectively disposed on the left and right headrest side wings 212. Through holes are formed in the headrest side wings 212, penetrating the rigid layer 210 and the buffer layer 220 of the headrest side wings 212. The head protection blocks 250 pass through the through holes and are movably disposed on the headrest side wings 212. Optionally, both the through holes and the head protection blocks 250 are located behind the centerline L1 of the headrest side wings 212 (i.e., behind the rear half of the headrest side wings 212 in the front-rear direction). The end of the head protection block 250 facing the receiving space S1 is the first end 250a, made of buffer material, used to protect the child's head 20. The head protection block 250 has a second end 250b located away from the receiving space S1. This second end 250b is made of either a cushioning material or a rigid material and is used to abut against intruding structures during side impacts. The first end 250a has a first surface 2211 and a second surface 2212 connected to the first surface 2211. The first surface 2211 and the second surface 2212 form an approximately 90-degree angle, and both the first surface 2211 and the second surface 2212 are located behind the centerline L1. Optionally, the second end 250b of the head protection block 250 is a shell made of PP material, and the first end 250a of the head protection block 250 is a strip-shaped cushioning element made of EPP material, which is inserted into the shell.

[0165] The head protection block 250 is movably connected to the headrest side wing 212 and can move between a first use position and a second use position relative to the headrest side wing 212. When the head protection block 250 is in the second use position, the first end 250a functions as described in this application. Figures 5 to 10c The headrest first protrusion 221 in the illustrated embodiment has the same function, and will not be described again here. Please refer to... Figure 10a When the head protection block 250 is in the first use position, the first end 250a extends a shorter length into the receiving space S1 (or is aligned with the inner surface of the headrest assembly 200), while the second end 250b extends a longer length out of the outer surface of the headrest side wing 212, so as to reduce the encroachment of the head protection block 250 on the receiving space S1. When the head protection block 250 is in the second use position, the first end 250a extends a longer length and protrudes beyond the inner surface of the headrest side wing 212, while the second end 250b extends a shorter length out of the outer surface of the headrest side wing, so that when the child's head 20 encounters a side collision, it can first contact the first end 250a of the head protection block 250 and rotate.

[0166] Please see Figure 10bWhen the head protection block 250 is in the second use position, the first end 250a of the head protection block 250 protrudes out of the cushion layer 220 and has a first surface 2211 and a second surface 2212, wherein the first surface 2211 is in front of the second surface 2212 and the angle between the first surface 2211 and the second surface 2212 is 90-150 degrees. The first end 250a can refer to the first convex portion 221 of the headrest in other embodiments, which will not be described here.

[0167] The headrest side wing 212 is provided with a one-way buckle for locking the head protection block 250, to prevent the head protection block 250 from moving from the first use position to the second use position, while allowing the user to move the head protection block 250 from the second use position back to the first use position. Illustratively, the one-way buckle can be a tapered groove formed on the headrest side wing 212, or a card slot that can be carded with a protrusion provided on the head protection block 250. Alternatively, the head protection block 250 can be removed from the headrest side wing 212 to increase the width of the space S1 of the headrest assembly 200, so as to accommodate children of larger ages.

[0168] When the child safety seat 10 is used daily, the head protection block 250 is configured in the first use position and is locked by the one-way buckle. When a lateral impact occurs, the invading structure first collides with the second end 250b of the head protection block 250 protruding out of the surface of the headrest side wing 212. The head protection block 250 breaks the lock of the one-way buckle under the impact of the invading structure, and moves from the first use position to the second use position, so that the first end 250a of the head protection block 250 protrudes out of the inner surface of the headrest assembly 200. The child's head 20 rotates after contacting the second surface 2212 of the first end 250a of the head protection block 250, and then collides with the cushion layer 220 of the headrest assembly 200, thereby reducing the lateral acceleration of the child's head 20.

[0169] Figure 26 Fig. 34 shows a child safety seat according to an embodiment of the present application. Referring to Figure 26 , Figure 26 A child safety seat 10 is shown, which is suitable for being mounted on a carrier body of a movable baby carrier, which can be a car seat of a car, a handle of a baby stroller, and of course, other carriers suitable for being mounted and combined with the child safety seat 10. The child safety seat 10 includes but is not limited to a baby basket, a sleeping box, etc. The child safety seat 10 can be mounted on different carrier bodies according to different application occasions, so as to broaden the application environment of the child safety seat 10 with the embodiment.

[0170] The child safety seat 10 includes a seat body 100 and a side impact protection block 300 mounted on the seat body 100. The seat body 100 includes a seat portion 110 for supporting a child's hip, a backrest portion 120 disposed above the seat portion 110, and a pair of seat side wings 130 disposed on the sides of the backrest portion 120. Optionally, a pair of seat side wings 130 are respectively disposed on the left and right sides of the backrest portion 120. The seat portion 110, the backrest portion 120, and the pair of seat side wings 130 collectively define an accommodation space S1 (see Figure 32 ). Optionally, the child safety seat 10 can further include a headrest assembly 200 mounted on the backrest portion 120, which is movably mounted on the backrest portion 120 of the seat body 100. In the present embodiment, the seat portion 110, the backrest portion 120, and the pair of seat side wings 130 are integrally formed as one piece from a hard material such as polyethylene. In some embodiments, the seat portion 110, the backrest portion 120, and the pair of seat side wings 130 can be separate pieces. For example, the backrest portion 120 can be pivotally connected to the seat portion 110 to adjust the inclination angle of the backrest portion 120 relative to the seat portion 110. In yet other embodiments, the pair of seat side wings 130 includes a side wing plate connected to the backrest portion 120 and an armrest connected to the side of the seat portion 110, which can be separate pieces or partially connected. In addition, the child safety seat 10 is provided with ISOFIX, Latch, or other connectors for securing the child safety seat 10 to a seat of a vehicle.

[0171] In the present specification, unless otherwise specified, the direction perpendicular to the sitting surface of the seat portion 110 is defined as the up-down direction (also referred to as the vertical direction), the direction perpendicular to the support surface of the backrest portion 120 is defined as the front-rear direction, and the direction orthogonal to both the front-rear direction and the vertical direction is defined as the left-right direction (also referred to as the horizontal direction). The direction in which a child looks when using the child safety seat 10 is defined as the front direction (front side) of the front-rear direction, and the direction opposite to the front direction is defined as the rear direction (rear side) of the front-rear direction. The side closer to the child (or the accommodation space S1) is defined as the inner side, and the side farther away from the child (or the accommodation space S1) is defined as the outer side.

[0172] The pair of seat side wings 130 respectively blocks the torso of the child from the left and right sides to prevent foreign objects from injuring the child from the sides. The seat side wings 130 are generally flat and have an inner side surface 130a on the side closer to the child and an outer side surface 130b on the side farther away from the child. Referring to Figure 30 , as viewed in the front-rear direction, the rear ends of the seat side wings 130 are connected to the left and right edges of the backrest portion 120, and the front ends of the seat side wings 130 are inclined toward the direction away from the accommodation space (i.e., toward the outer side), such that the accommodation space S1 has a V-shaped opening that is outwardly expanded. Referring to Figure 29 and Figure 32When viewed in the up-down direction, the upper end of the seat wing portion 130 is inclined toward the direction away from the accommodation space (i.e., toward the outside), and the left and right seat wing portions 130 form a V-shape so that the upper end of the seat wing portion 130 is closer to the outside than the lower end of the seat wing portion 130. Thus, when a side impact occurs, the front end of the seat wing portion 130 generally contacts the intruding structure before the rear end of the seat wing portion 130, and the upper end of the seat wing portion 130 contacts the intruding structure before the lower end of the seat wing portion 130. In addition, the seat wing portion 130 has, in the vertical direction, a first region A1, a third region A3, and a second region A2 from bottom to top, respectively. The first region A1 is adjacent to the seat portion 110 to correspond to the hip of the child. The second region A2 is adjacent to the headrest assembly 200 to correspond to the shoulder of the child. The third region A3 is located between the first region A1 and the second region A2 to separate the first region A1 and the second region A2. The second region A2 is located at a higher horizontal level than the first region A1. In addition, in the embodiment, the horizontal center line L2 divides the seat wing portion 130 into two parts of the same vertical height, the first region A1 is located below the horizontal center line L2 of the seat wing portion 130, the second region A2 is located above the horizontal center line L2 of the seat wing portion, and the horizontal center line L2 passes through the third region A3. The child safety seat 10 further includes a side impact protection block 300, which can be provided on at least one of the outer side of the first region A1, the inner side of the first region A1, the outer side of the second region A2, the inner side of the second region A2, the outer side of the third region A3, or the inner side of the third region A3. Figure 32

[0173] Referring to Figures 26 to 28 In the embodiment, the side impact protection block 300 includes a pair of seat first protrusions 310 located on the inner side of the first region A1 of the pair of seat wing portions 130, a pair of seat second protrusions 320 located on the inner side of the second region A2, and a pair of seat third protrusions 330 located on the outer side of the third region A3. The horizontal level of the seat second protrusion 320 is higher than that of the seat third protrusion 330, and the horizontal level of the seat third protrusion 330 is higher than that of the seat first protrusion 310. In other embodiments, the second protrusion is located on the inner side of the second region A2 and the third region A3 (as shown in FIG. 6), and the third protrusion can also be installed on the outer side of the third region A3 of the single seat wing portion 130 or on the outer side of the second region A2 and the third region A3. Details are not described here. In view of the mirror symmetry of the pair of seat wing portions 130, only one side of the seat wing portion 130 is described below as an example. Figure 37

[0174] ​​The seat portion first protrusions 310 are arranged at the lower part (first region A1) of the seat side wing portions 130, abutting the upper surface of the seat portion 110 and protruding from the inner side surface 130a of the seat side wing portions 130 toward the direction of the accommodation space S1, so that the inner side surface 130a of the seat side wing portions 130 is stepped. See Figure 30 , the first distance D1 between the inner side surfaces of the first regions A1 of the pair of seat side wing portions 130 (i.e. the inner side surfaces of the seat portion first protrusions 310) is substantially equal to the width of the child's hips, the second distance D2 between the inner side surfaces of the second regions A2 (i.e. the inner side surfaces of the seat portion second protrusions 320) is greater than the width of the child's shoulders, and the first distance D1 is smaller than the second distance D2 (see Figure 32 and Figure 33a ). The recesses are formed between the seat portion first protrusions 310 and the headrest assembly 200, and the seat portion first protrusions 310, the headrest assembly 200 and the seat side wing portions 130 enclose the avoidance space S2. Thus, when the child is seated in the child safety seat 10, the pair of seat portion first protrusions 310 clamps the child's hips from both sides (see Figure 33a ), so that the child's hips can be fixed between the two seat portion first protrusions 310, while the child's shoulders are kept with a certain space of movement between the inner side surfaces 130a of the seat side wing portions 130.

[0175] The seat portion first protrusions 310 can be made of a block of hard material such as polypropylene, high-density polyethylene, etc., or a soft cushioning material such as at least one of high-density foamed polyethylene, foamed polystyrene, and a composite material of foamed polyethylene and polystyrene, or a shell of hard material such as polypropylene, etc. is formed for the first protrusions, and a soft cushioning material such as foamed polyethylene, air bags, soft rubber or honeycomb aluminum plate, etc. is filled in the shell, so that the child is stably fixed while being prevented from being squeezed in a collision.

[0176] See Figure 27 and Figure 31The outer side of the first protruding part 310 of the seat part is provided with an engaging part 311 for connecting the seat body 100. The engaging part 311 can be a T-shaped hook, which can be slidably engaged with the first connecting part 131 located at the inner side 130a of the seat wing part 130, so that the first protruding part 310 of the seat part is detachably fixed on the seat wing part 130. After the first protruding part 310 of the seat part is removed, the width of the accommodating space S1 can be enlarged, and the seat body 100 can be used by a child with a larger body size. Generally, a child with a larger body size (for example, a child with a height exceeding 1100 mm) can be protected by the side airbag of the vehicle, while a child with a smaller body size can not be protected by the side airbag and needs additional side impact protection. Details will be described below. In some embodiments, the first protruding part 310 of the seat part and the seat wing part 130 can be an integral piece; in some other embodiments, the first protruding part 310 of the seat part can be fixed on the seat part 110 by the engaging part 311; in some other embodiments, the first protruding part 310 of the seat part can be fixed on the backrest part 120 by the engaging part 311, as long as the first protruding part 310 of the seat part can fix the hip of the child, the connection mode of the first protruding part 310 of the seat part and the seat body 100 is not particularly limited. In addition, in some embodiments, the first protruding part 310 of the seat part is fixed on the seat part 110 by the engaging part 311. The backrest part 120 is pivotally connected to the seat part 110, and the two seat wing parts 130 are respectively connected to the left and right sides of the backrest part 120 and pivot with the backrest part 120. When the backrest part 120 is inclined backward, the position of the first protruding part 310 of the seat part relative to the seat part does not change, which can prevent the hip from being disengaged due to the movement of the first protruding part 310 of the seat part.

[0177] In addition, the front face (i.e., the face away from the backrest part 120) of the first protruding part 310 of the seat part is inclined toward the backrest part 120, so as to form a recess at one end close to the seat part 110, thereby increasing the movement space of the leg of the child close to the seat part, and forming a handrail protruding forward at the front end of the top face, so as to facilitate the child to hold the handrail. The first protruding part 310 of the seat part is generally inverted trapezoidal, and the length of the top face (i.e., the face away from the seat part 110) of the first protruding part 310 of the seat part is greater than that of the bottom face (i.e., the face close to the seat part 110) of the first protruding part 310 of the seat part. In some embodiments, the first protruding part 310 of the seat part is a part of the seat armrest. At least a part of the inner side of the first protruding part 310 of the seat part is substantially perpendicular to the seat surface of the seat part 110, which supports the hip of the child from the left and right sides and prevents the child from falling to the side.

[0178] Referring to Figure 26 and Figure 32The seat second protrusions 320 are arranged at the upper part of the seat side wings 130 (i.e. the second area A2), and can be made of foamed soft materials such as sponge, foamed polyethylene, foamed polystyrene, and composite materials of foamed polyethylene and polystyrene, etc. The seat second protrusions 320 are used to provide side cushion protection for the child's shoulder. Alternatively, the seat second protrusions 320 are made of soft materials with a lower indentation hardness than the seat first protrusions 310. Or, the seat second protrusions 320 are made of materials with a lower density than the seat first protrusions 310, so that the seat second protrusions 320 are softer than the seat first protrusions 310. Alternatively, the seat second protrusions 320 have a hollow structure such as honeycomb structure, etc. with a lower indentation hardness. The seat second protrusions 320 have a smaller thickness than the seat first protrusions 310, so that the child's torso has a larger avoiding space S2 when pivoting. Alternatively, the distance between the inner sides of the left and right seat first protrusions 310 is 15-20 cm, and the distance between the inner sides of the left and right seat second protrusions 320 is 22-28 cm. For example, the distance between the inner sides of the left and right seat first protrusions 310 is 18 cm, and the distance between the inner sides of the left and right seat second protrusions 320 is 24 cm. For another example, the distance between the two seat second protrusions 320 is 4-10 cm larger than the distance between the two seat first protrusions. Indentation hardness refers to the total force required to press a specified depth on the surface of a soft porous material under specified conditions using a standard instrument, usually expressed in Newton (N), and is used to characterize the hardness of the material. Generally, the higher the density of the same material, the greater the indentation hardness.

[0179] The seat second protrusions 320 can be installed at the inner side 130a of the seat side wings 130, or fixedly installed at the lower part of the headrest assembly 200, and can move up and down with the headrest assembly 200 to adapt to children of different sizes. Alternatively, the seat first protrusions 310 and the seat second protrusions 320 can be removed from the seat body 100 to adapt to children of larger size.

[0180] Referring to Figures 26-27 and Figures 29-30The seat portion third protrusion 330 is disposed on the outer side surface of the seat side wing portion 130 at the middle portion (third region A3) in the front-rear direction. In the upward-downward direction, the seat portion third protrusion 330 is located between the seat portion first protrusion 310 and the seat portion second protrusion 320, the height of the seat portion second protrusion 320 is higher than the height of the seat portion third protrusion 330, and the height of the seat portion first protrusion 310 is lower than the height of the seat portion third protrusion 330. The geometric center of the seat portion third protrusion 330 is located below the horizontal center line L2 of the seat side wing portion 130 to avoid the seat portion third protrusion 330 protruding from the surface of the seat side wing portion 130 interfering with the side airbag of the vehicle, causing the child safety seat 10 to roll over.

[0181] With reference to Figure 30 and Figure 31 , in the front-rear direction, the seat portion third protrusion 330 is located at the rear end of the seat side wing portion 130 and abuts against the backrest portion 120, the seat portion third protrusion 330 and the backrest portion 120 sandwich the rear end of the seat side wing portion 130 from both sides, so that the lateral force received by the seat portion third protrusion 330 can be directly transmitted to the backrest portion 120, thereby avoiding the seat side wing portion 130 being broken or detached due to excessive load moment. Referring to Figure 30 , the width of the seat portion third protrusion 330 is less than the maximum width of the seat side wing portion 130, and the front end of the seat side wing portion 130 is closer to the outer side than the outer side surface of the seat portion third protrusion 330. When the seat side wing portion 130 is not impacted or pressed by the intruding structure, there is a distance D3 between the front end of the seat side wing portion 130 and the outer side surface of the seat portion third protrusion 330 in the left-right direction. When the front end of the seat side wing portion 130 is laterally pressed by the intruding structure and deforms by bending inwardly until the front end of the seat side wing portion 130 is in the same position as the outer side surface of the seat portion third protrusion 330 in the left-right direction (i.e. the distance D3 is 0 mm, see Figure 34b , the outer side surface of the seat portion third protrusion 330 abuts against the intruding structure to prevent the seat side wing portion 130 from further bending. The safety seat manufacturer can set the maximum allowable deformation degree of the seat side wing portion by setting the distance D3, prolong the total time of the collision by the bending deformation of the seat side wing portion 130, and reduce the harm to the child. Thus, not only does the child safety seat become more compact without the need to disassemble the seat portion third protrusion 330, but the collision safety of the child safety seat is also improved.

[0182] In the present embodiment, the third protrusion 330 of the seat portion does not overlap the first protrusion 310 and the second protrusion 320 in height and front-rear positions, so that the force of the side impact on the third protrusion 330 is not directly transmitted to the first protrusion 310 or the second protrusion 320, thereby reducing the injury to the child. In some embodiments, the third protrusion can be located on the outer side of the first region A1 or the outer side of the second region A2, and the second protrusion can be located on the inner side of the third region A3 or cover the inner side of the second region A2 and the inner side of the third region A3. In the case where the third protrusion is located on the outer side of the second region A2 and the outer side of the third region A3, and the second protrusion covers the inner side of the second region A2 and the inner side of the third region A3, the third protrusion can be arranged closer to the rear end of the seat side portion than the second protrusion in the front-rear direction. In some embodiments, the child safety seat can only have the third protrusion 330 of the seat portion, without the first protrusion 310 and the second protrusion 320 of the seat portion.

[0183] Please refer to the accompanying drawings Figures 33a to 34b , Figures 33a to 34b is a schematic view of a collision process in which the intrusion structure 30 collides with the vehicle from the left side and collides with the child safety seat 10. Figure 33a and Figure 34a shows the intrusion structure 30 approaching the child safety seat 10 from left to right in the pre-impact phase of the side impact; Figure 33b and Figure 34b shows the intrusion structure 30 crushing the seat side portion 130 of the child safety seat 10, causing the child 21 to rotate to the left side in the post-impact phase of the side impact. During the collision, the intrusion structure 30 first contacts the front end of the outer side 130b of the seat side portion 130, causing the seat side portion 130 to bend inward until the intrusion structure 30 abuts against the third protrusion 330 of the seat portion located at the rear end of the seat side portion 130. Subsequently, the intrusion structure 30 abuts against the seat side portion 130 and the third protrusion 330 of the seat portion, pushing the child safety seat 10 to move to the right and accelerating the child safety seat 10 to the same speed as the intrusion structure 30. The child's hips are fixed on the seat portion by the first protrusion 310, and the child's upper limbs (including the head, arms, shoulders, etc.) remain relatively stationary under the action of inertia, so that the child's upper limbs rotate to the left around the hips into the left avoidance space, and then collide with the second protrusion 320 of the seat portion located on the inner side of the left seat side portion 130, causing the second protrusion 320 of the seat portion to be compressed and deformed to buffer the impact on the child's shoulders. The third distance D3 between the front end of the seat side portion 130 and the third protrusion 330 of the seat portion, the avoidance space S2, and the buffering material of the second protrusion 320 of the seat portion play a role in prolonging the acceleration time of the child, reducing the average acceleration of the child's upper limbs during the collision, and avoiding injury to the child during the collision.

[0184] Referring to Figures 35 to 37 According to another embodiment of the present application, there is disclosed yet another child safety seat 10. In this embodiment, the child safety seat 10 comprises a seat body 100 and a side impact protection block 300 mounted on the seat body 100. The seat body 100 comprises a seat portion 110 for supporting the child's hips, a backrest portion 120 disposed above the seat portion 110, and a seat wing portion 130 disposed on the side of the backrest portion 120. Optionally, a pair of seat wing portions 130 are disposed on the left and right sides of the backrest portion 120, respectively. The structure of the seat body 100 is substantially the same as that of the child safety seat 10 of the present application Figure 26 The structure of the seat body 100 is substantially the same as that of the child safety seat 10 of the present application

[0185] The pair of seat first protrusions 310 are connected together by a retaining portion 312, and the seat first protrusions 310 and the retaining portion 312 form a seating space between the two seat first protrusions 310. The retaining portion 312 is made of a hard and rigid material, and has an L-shaped structure that is adapted to the joint between the seat portion 110 and the backrest portion 120. The retaining portion 312 comprises a piece that abuts against the seat portion 110, a piece that abuts against the backrest portion 120, and a pocket at each end of the piece for receiving the pair of seat first protrusions 310. When a child is seated on the child safety seat 10, the child's hips and back are simultaneously pressed against the pieces of the retaining portion 312, thereby preventing the seat first protrusions 310 from falling off the seat body 100. The width of the retaining portion 312 is approximately equal to the first distance D1 (the distance between the inner sides of the pair of seat first protrusions 310). The retaining portion 312 has a hook (not shown in the figures) at the lower end, which can be engaged in the hole provided in the backrest portion 120 and the seat portion 110. In this way, the pair of seat first protrusions 310 can be quickly mounted and dismounted, and the user can be prevented from mistakenly mounting a single seat first protrusion 310.

[0186] A recess 132 is provided on the upper portion of the inner side 130a of the seat wing portion 130 (corresponding to the second region A2), and a seat second protrusion 320 is embedded in the recess 132. The seat second protrusion 320 is made of a soft and foamed cushioning material, and can cushion the impact of the child's shoulders. By embedding the seat second protrusion 320 in the recess 132, the second distance D2 can be further increased, the duration of the child's torso rotation can be increased, the average acceleration of the child's upper limbs during the impact can be reduced, and the child can be protected from injury.

[0187] A seat third protrusion 330 is provided on the outer side 130b of the seat wing portion 130. The seat third protrusion 330 is pivotally connected to the rear end of the seat wing portion 130, and can be pivoted between a deployed position (shown in FIG. 34) in which the seat third protrusion 330 protrudes from the outer side 130b of the seat wing portion 130, and a retracted position (shown in FIG. 33) in which the seat third protrusion 330 is retracted into the seat wing portion 130. Figure 35) and a folded position (not shown in the figure) abutting the outer side 130b of the seat side wing 130.

[0188] Referring to Figures 38 to 40 According to an embodiment of the present application, there is disclosed still another child safety seat 10. In this embodiment, the child safety seat 10 comprises a seat body 100 and a side impact protection block 300 mounted on the seat body 100. The seat body 100 comprises a seat portion 110 for supporting the child's buttocks, a backrest portion 120 disposed above the seat portion 110, and a seat side wing 130 disposed on the side of the backrest portion 120. Optionally, a pair of seat side wings 130 are disposed on the left and right sides of the backrest portion 120, respectively. The structure of the seat body 100 is substantially the same as that of the child safety seat 10 of the present application Figure 26 The embodiment shown in Fig. 34 is substantially the same as the above-mentioned embodiments, and thus will not be described again.

[0189] The side impact protection block 300 comprises a pair of seat first protrusions 310, a pair of seat second protrusions 320, and a pair of seat third protrusions 330. The pair of seat first protrusions 310 and the pair of seat second protrusions 320 are connected on both sides of a holding portion 312. The holding portion 312 is a substantially L-shaped sheet structure comprising a sheet body abutting the seat portion 110 and a sheet body abutting the backrest portion 120. The sheet body abutting the backrest portion 120 is longer in length and extends from the upper surface of the seat portion 110 to below the headrest assembly 200. When the child is seated on the child safety seat 10, the child's back abuts against the sheet body of the holding portion 312, preventing the seat first protrusions 310 and the seat second protrusions 320 from falling off the seat body 100. The seat first protrusions 310 and the seat second protrusions 320 on one side will be described below as an example.

[0190] The seat second protrusions 320 and the seat first protrusions 310 are arranged in an up-down manner, and the seat first protrusions 310 and the seat second protrusions 320 have substantially the same thickness. The outer side surfaces of the seat first protrusions 310 and the seat second protrusions 320 are attached to the inner side surface 130a of the seat side wing part 130, the position of the seat first protrusions 310 corresponds to the first area A1 of the seat side wing part 130, and the position of the seat second protrusions 320 corresponds to the second area A2 and the third area A3 of the seat side wing part 130. The inner side surfaces of the seat first protrusions 310 and the seat second protrusions 320 are connected to form a vertical plane, which faces the child's torso. The seat second protrusions 320 are made of soft cushioning material, and the hardness of the seat first protrusions 310 is greater than that of the seat second protrusions 320; or the indentation strength of the seat first protrusions 310 is greater than that of the seat second protrusions 320; or the density of the seat first protrusions 310 is greater than that of the seat second protrusions 320. Therefore, the seat first protrusions 310 can engage the child's hip, preventing the child's hip from moving in a collision. In a side collision, the child's upper limbs pivot to one side and press against the seat second protrusions 320, which are depressed after being pressed, forming an avoidance space S2 for the child's upper limbs to pivot, thereby reducing the child's injury. For example, the seat first protrusions 310 are made of hard high-density polyethylene, and the seat second protrusions 320 are made of soft high-elastic sponge. For another example, the seat first protrusions 310 are made of high-density foamed polyethylene, and the seat second protrusions 320 are made of soft sponge. For yet another example, the seat first protrusions 310 are made of high-density foamed polyethylene, and the seat second protrusions 320 are made of low-density foamed polyethylene.

[0191] Referring to Figures 41 to 44 According to another embodiment of the present application, a child safety seat and a seat cushion are disclosed. The child safety seat 10 comprises a seat body 100, which is covered by a fabric cover (not shown in the figure) made of skin-friendly fabric material. The seat body 100 is substantially the same as the child safety seat of the prior art, and will not be described here.

[0192] Referring to Figure 44 The child safety seat 10 further comprises a seat cushion 400, which is mainly made of flexible fabric material and can be detachably connected to a child carrier such as a child safety seat, a baby stroller, a baby cradle, a baby sling or a baby bed, so that it can be used by children of different heights.

[0193] The seat cushion 400 comprises a seat cushion main body 410, a pair of seat cushion side wings 420 connected to the left and right sides of the seat cushion main body 410, and a seat first convex portion 310 connected to the two sides of the seat cushion main body 410. The seat cushion side wings 420 are located at the upper part of the seat cushion main body 410 (for example, above the middle line of the length direction of the seat cushion main body 410), corresponding to the upper limbs (arms, shoulders, etc.) of the child, and can play the role of the second convex portion in this embodiment. The seat first convex portion 310 is in the shape of a sector, corresponding to the transition surface of the seat portion 110 and the backrest portion 120, and is made of a bag-shaped fabric filled with a cushioning material. The seat first convex portion 310 is sewn on the seat cushion main body 410 and can pivot relative to the seat cushion main body 410 along the sewing line. The seat first convex portion 310 is located at the lower part of the seat cushion main body 410 (for example, above the middle line of the length of the seat cushion main body 410), corresponding to the hip of the child. The thickness of the seat first convex portion 310 is greater than the thickness of the seat cushion side wings 420.

[0194] Referring to Figure 42 The front view of the seat cushion 400 is shown. When the seat cushion 400 is installed in the child safety seat 10, the distance between the inner sides of the two seat first convex portions 310 is less than the distance between the inner sides of the two seat cushion side wings 420, so that the child has a larger transverse space for the upper limbs than for the hips when using the seat cushion. The two seat first convex portions 310 fix the hips of the child from both sides, and the upper limbs of the child can move and pivot between the two seat cushion side wings 420. In this embodiment, in other embodiments, the seat cushion side wings 420 and the seat first convex portion 310 can also be integrated, as long as the distance between the inner sides of the two seat first convex portions 310 is less than the distance between the inner sides of the two seat cushion side wings 420. In addition, the material indentation hardness of the seat first convex portion 310 is greater than that of the seat cushion side wings 420. For example, the filling material of the seat first convex portion 310 is polystyrene foam material, and the filling material of the seat cushion side wings 420 is sponge. In addition, the back of the seat cushion 400 is provided with a connecting member such as Velcro, buttons or buckles, which is clamped on the cloth cover of the seat body 100. In this way, the seat body can be modified without changing the cloth cover of the seat body, and the side impact protection function can be added to the existing child safety seat, reducing the manufacturing cost. In addition, when the first convex portion is removed, the cloth cover does not need to be removed, and the use is more convenient.

[0195] The technical features of the above embodiments can be combined in any way. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

[0196] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A headrest assembly comprising: The headrest assembly comprises: a headrest support portion having a head support surface; and a headrest side wing portion connected to a side of the headrest support portion, wherein an inner side of the headrest side wing portion is provided with a headrest first protrusion having a first surface away from the head support surface and a second surface close to the head support surface, the first surface being arranged to tilt towards a direction close to the headrest side wing portion from back to front.

2. The headrest assembly of claim 1, wherein, An angle between the first surface and the second surface is greater than 90 degrees and less than 150 degrees.

3. The headrest assembly of claim 1, wherein, A thickness of the headrest side wing portion corresponding to the first surface gradually decreases from back to front.

4. The headrest assembly of claim 1, wherein, At least one of the first surface and the head support surface is provided with an anti-skid pattern; and / or A friction coefficient of the head support surface is greater than a friction coefficient of the first surface.

5. The headrest assembly of any one of claims 1 to 4, wherein, The second surface is located at a rear portion of a transverse center line L1 of the headrest side wing portion.

6. The headrest assembly of any one of claims 1 to 4, wherein, The headrest first protrusion is detachably mounted on the headrest side wing portion; or, The headrest assembly further comprises a head protection block having a first end and a second end, the headrest first protrusion being located at the first end, the head protection block being arranged to pass through the headrest side wing portion and being movable between a first use position and a second use position, when the head protection block is located at the first use position, the first end protruding from an inner side surface of the headrest side wing portion; when the head protection block is located at the second use position, the second end protruding from an outer side surface of the headrest side wing portion.

7. A headrest assembly according to any one of claims 1 to 4 wherein, An inner side of the headrest side wing portion is further provided with a headrest second protrusion, a groove being formed between the headrest first protrusion and the headrest second protrusion.

8. The headrest assembly of claim 7, wherein, The groove is provided with an elastic buffer member, a density of the elastic buffer member being less than a density of the headrest first protrusion.

9. The headrest assembly of any one of claims 1 to 4, wherein, The headrest first protrusion is formed by stacking two or more buffer materials, a density of a buffer material corresponding to the first surface being less than a density of a buffer material corresponding to the second surface.

10. A child safety seat comprising: a seat portion; a backrest portion connected to the seat portion; and two seat side wing portions connected to left and right sides of the backrest portion; characterized in that the child safety seat further comprises a side impact protection block protruding from the seat side wing portions, wherein each of the seat side wing portions has a first region corresponding to a child's hip, wherein the first region is located below a horizontal center line L2 of the seat side wing portion, wherein the side impact protection block comprises two seat portion first protrusions located at an inner side surface of the first region, the two seat portion first protrusions protruding from inner side surfaces of the two seat side wing portions to clamp the child's hip.

11. The child safety seat according to claim 10, wherein the side impact protection block further comprises a seat portion third protrusion protrudingly arranged at an outer side surface of the seat side wing portion and being higher than the seat portion first protrusions.

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