Headrest assembly and child safety seat

Abstract

The invention 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 and toddler products, and in particular to a headrest assembly and a child safety seat. Background Art

[0002] A child safety seat, also known as a Child Restraint System (CRS), is a child safety restraint system designed for children of varying ages (or weights) and designed to secure them in a motor vehicle. It consists of a buckled seatbelt assembly or flexible components, adjustment mechanisms, and accessories. Child safety seats improve children's safety by providing appropriate restraint and preventing harmful contact with vehicle interior components. Frontal and side impacts are the primary causes of child death or serious injury in accidents. Summary of the Invention

[0003] To address the above issues, according to one aspect of the present application, a headrest assembly is provided, comprising a headrest support portion and headrest wing portions. The headrest support portion comprises a headrest support surface; the headrest wing portions connect to the side portions of the headrest support portion, wherein a first headrest protrusion is provided on the inner side of the headrest wing portion. The first headrest protrusion comprises a first surface distal from the headrest support surface and a second surface proximal to the headrest support surface. The first surface is arranged to be inclined from rear to front toward the headrest wing portions.

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

[0005] In one embodiment, the angle between the first surface and the front-to-back direction is greater than 30 degrees and less than 90 degrees; or, the angle formed by the extended surface of the first surface and the head support surface is greater than the angle formed between the extended surface of the second surface and the head support surface.

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

[0007] In one embodiment, the side wings of the headrest are provided with a cushioning layer made of elastic material, wherein the thickness of the cushioning layer corresponding to the first surface gradually decreases from back to front; or the thickness of the cushioning layer corresponding to the second surface gradually decreases from front to back.

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

[0009] In one embodiment, the first surface has anti-slip grooves.

[0010] In one embodiment, the second surface is located behind the transverse center line L1 of the headrest wing portion.

[0011] In one embodiment, the first surface is located behind the transverse center line L1 of the headrest wing portion.

[0012] In one embodiment, the vertical height of the first headrest protrusion is smaller than the vertical height of the headrest wing portion, and the vertical center plane of the headrest wing portion passes through the first headrest protrusion.

[0013] In one embodiment, a boundary between the first surface and the second surface forms a ridge line, and a thickness of the headrest side wing portion corresponding to the ridge line is greater than a thickness of the headrest side wing portion corresponding to the first surface.

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

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

[0016] The headrest assembly also includes a head protection block, which has a first end and a second end, and the first protrusion of the headrest is located at the first end; the head protection block is arranged on the side wing of the headrest and can move between a first use position and a second use position; when the head protection block is in the first use position, the first end protrudes from the inner side surface of the side wing of the headrest; when the head protection block is in the second use position, the second end protrudes from the outer side surface of the side wing of the headrest.

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

[0018] In one embodiment, a groove is formed between the first convex portion of the headrest and the second convex portion of the headrest, and an elastic buffer is provided in the groove. The density of the elastic buffer is lower than the density of the first convex portion of the headrest.

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

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

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

[0022] In one embodiment, the first convex portion of the headrest is formed by stacking two or more cushioning materials, and the density of the cushioning material corresponding to the first surface is lower than the density of the cushioning material corresponding to the second surface.

[0023] In one embodiment, the length of the second surface is smaller than the length of the first surface.

[0024] According to another aspect of the present application, a headrest assembly is provided, comprising: a rigid layer and a cushioning layer, wherein the rigid layer forms a receiving space for accommodating a child's head, the receiving space having a horizontal opening. A cushioning layer is disposed on the rigid layer and located inside the receiving space, the cushioning layer having a pair of first headrest protrusions protruding toward the inside of the receiving space; the first headrest protrusions 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 configured to be inclined from back to front toward the receiving space.

[0025] In one embodiment, the angle between the first surface and the second surface satisfies the requirement of being greater than 90 degrees and less than 150 degrees; or the angle between the first surface and the front-back direction satisfies the requirement of being greater than 30 degrees and less than 90 degrees; or

[0026] An included angle formed by an extended surface of the first surface and the head support surface is greater than an included angle formed by an extended surface of the second surface and the head support surface.

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

[0028] In one embodiment, the second surface is located behind the transverse center line L of the headrest wing portion.

[0029] In one embodiment, the first surface is located behind the transverse center line L1 of the headrest wing portion.

[0030] In one embodiment, the first protrusion of the headrest is detachably mounted on the cushioning layer or the rigid layer;

[0031] In one embodiment, the density of the buffer layer is lower than that of the first protrusion of the headrest.

[0032] In one embodiment, the first protrusion of the headrest and the buffer layer are integrally formed.

[0033] In one embodiment, a ridge is formed at the junction of the first surface and the second surface, and the thickness of the buffer layer corresponding to the ridge is greater than the thickness of the buffer layer corresponding to the first surface or the second surface on the same horizontal plane.

[0034] In one 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 smaller than the length of the first surface.

[0035] According to another aspect of the present application, a headrest assembly is provided, comprising: a headrest support portion and headrest wing portions, the headrest wing portions being connected to the support portion on left and right sides, respectively; a cushioning layer being provided on inner sides of the headrest wing portions, the cushioning layer having a first region and a second region; the second region being 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 one embodiment, the indentation hardness of the buffer material constituting the first region is smaller than the indentation hardness of the buffer material constituting the second region.

[0037] In one embodiment, the buffer layer of the first area is formed by stacking a first buffer material layer and a second buffer material layer, wherein the second buffer material layer is located on the inner side of the headrest side wing, and the indentation hardness of the buffer material constituting the first buffer material layer is less than the indentation hardness of the buffer material constituting the second buffer material layer.

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

[0039] According to another aspect of the present application, a headrest assembly is provided, which includes a headrest support portion having a head support surface; and two headrest side wings, which are respectively connected to the support portion on the left and right sides, one of the two headrest side wings 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 first headrest protrusion at an end away from the head support surface; an accommodating space is enclosed between the first inner side surface, the second inner side surface and the head support surface, and the accommodating space has an inward-retracted horizontal opening.

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

[0041] In one embodiment, a groove is formed between the head support surface and each of the first protrusions of the headrest, and an elastic buffer is disposed in the groove.

[0042] According to another aspect of the present application, a child safety seat is provided, comprising a seat body and a headrest assembly as described in any one of the first to fourth aspects of the present application, wherein the headrest assembly is mounted on the seat body.

[0043] According to another aspect of the present application, a child safety seat is provided, comprising: a seat portion, a backrest portion connected to the seat portion, and two seat wings connected to the left and right sides of the backrest portion, respectively. The child safety seat also includes side impact protection blocks protruding from the seat wings, wherein each of the seat wings has a first region corresponding to the child's hips, a second region corresponding to the child's shoulders, and a third region located between the first and second regions, the second region being located higher than the first region, wherein the side impact protection block is located on at least one of an outer side surface of the first region, an inner side surface of the first region, an outer side surface of the second region, an inner side surface of the second region, an outer side surface of the third region, or an inner side surface of the third region.

[0044] In one embodiment, the side impact protection block includes two first seat protrusions located on the inner side surface of the first area; the two first seat protrusions respectively protrude from the inner side surfaces of the two seat side wings to clamp the hips of the child.

[0045] In one embodiment, the first seat protrusion is mounted on the inner side of the seat side wing; or, the first seat protrusion is mounted on the seat and adjacent to the lower end of the seat side wing; or, the first seat protrusion is mounted on the backrest and adjacent to the lower end of the seat side wing.

[0046] In one embodiment, the first protrusion of the seat portion has a snap-fit portion, and the first protrusion of the seat portion is detachably connected to the seat side wing portion via the snap-fit portion.

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

[0048] In one embodiment, the child safety seat further comprises a headrest assembly connected to the backrest portion; a recess is formed between the first convex portion of the seat portion, the seat side wings and the headrest assembly to form an avoidance space.

[0049] In one embodiment, the first protrusion of the seat portion has a first surface away from the backrest portion, and the first surface is inclined from top to bottom toward the backrest portion.

[0050] In one embodiment, the material of the first protrusion of the seat portion is at least one of polypropylene, high-density polyethylene, foamed polyethylene, foamed polystyrene, and a composite material of foamed polyethylene and polystyrene.

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

[0052] In one embodiment, the side impact protection block further includes two seat second protrusions, which are buffer pads, wherein the seat second protrusions are located on the inner side surface of the second area, the inner side surface of the third area, or the inner side surfaces of the second area and the third area.

[0053] In one embodiment, the second protrusion of the seat is detachably mounted on the inner side of the seat side wing; or, the child safety seat further includes a headrest assembly, which is connected to the backrest; the second protrusion of the seat is detachably mounted on the lower part of the headrest assembly.

[0054] In one embodiment, the indentation hardness of the second protrusion of the seat portion is smaller than the indentation hardness of the first protrusion of the seat portion; or, the density of the second protrusion of the seat portion is smaller than the density of the first protrusion of the seat portion.

[0055] In one embodiment, the thickness of the second protrusion of the seat portion is smaller than the thickness of the first protrusion of the seat portion.

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

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

[0058] In one embodiment, the side impact protection block further includes: a third seat protrusion, which is protrudingly provided on the outer side surface of the seat wing portion; wherein the third seat protrusion is located above the first seat protrusion.

[0059] In one embodiment, the front end of the seat wing portion is located outside the third protrusion of the seat portion, and a third distance D3 is defined between the third protrusion of the seat portion and the front end of the seat wing portion.

[0060] In one embodiment, the third seat protrusion is located on the outer side of the third area, and the geometric center of the third seat protrusion is located below the horizontal center line L2 of the seat side wing; the third seat protrusion is located behind the first seat protrusion and adjacent to the backrest.

[0061] According to another aspect of the present application, a child safety seat is provided, comprising a seat portion, a backrest portion, and a pair of seat side wings. The inner side surface of each of the two seat side wings is stepped and includes a first surface and a second surface located above the first surface, wherein the first surface protrudes from the second surface. The first surface is the inner side surface of a first protrusion 310 of the seat portion, and the second surface is the inner side surface of the second region and the third region.

[0062] In one embodiment, there is a first distance D1 between the two first surfaces, and a second distance D2 between the two second surfaces. The first distance D1 is 8-16 cm smaller than the second distance D2.

[0063] In one embodiment, the first spacing is 10 to 20 centimeters, and the second spacing is 22 to 40 centimeters.

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

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

[0066] In one embodiment, the compression strength of the second seat cushion side wing portion is greater than that of the first seat cushion side wing portion; or the density of the second seat cushion side wing portion is greater than that of the first seat cushion side wing portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0068] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0069] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only for illustrative purposes and are not necessarily drawn to true scale.

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

[0071] Figure 2 Show Figure 1 A sectional view of the headrest assembly taken along line H0-H0;

[0072] Figures 3a to 3c Show Figure 1 Schematic diagram of the process of the headrest assembly being subjected to a side impact;

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

[0074] Figure 5 A perspective view showing a headrest assembly according to an embodiment of the present application;

[0075] Figure 6 Show Figure 5 Exploded view of the headrest assembly in Figure 1;

[0076] Figure 7 Show Figure 5 a sectional view of the headrest assembly taken along line H1-H1;

[0077] Figure 8 Show Figure 5 a sectional view of the headrest assembly taken along line H2-H2;

[0078] Figure 9a Show Figure 5 Another cross-sectional view of the headrest assembly taken along line H2-H2;

[0079] Figure 9b Show Figure 5 Another cross-sectional view of the headrest assembly taken along line H2-H2;

[0080] Figures 10a to 10c Show Figure 5 Schematic diagram of the process of the headrest assembly being subjected to a side impact;

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

[0082] Figure 12 Show Figure 11 a sectional view of the headrest assembly taken along line H3-H3;

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

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

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

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

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

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

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

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

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

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

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

[0094] Figure 24 Show Figure 23 Exploded view of the headrest assembly in Figure 1;

[0095] Figure 25a Show Figure 23 A cross-sectional view of the headrest assembly taken along line H9-H9 in FIG, wherein the head protection block is in the second use position;

[0096] Figure 25b Show Figure 23 A cross-sectional view of the headrest assembly taken along line H9-H9 in FIG, wherein the head protection block is in the first use position;

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

[0098] Figure 27 Show Figure 26 An exploded view of the child safety seat shown;

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

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

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

[0102] Figure 31 Show Figure 26 a cutaway view of the child safety seat shown;

[0103] Figure 32 Show Figure 26 A schematic diagram of the area of the child safety seat shown;

[0104] Figure 33a and Figure 33b Show Figure 28 A front view schematic diagram of the process of a child safety seat being hit by a side impact;

[0105] Figure 34a and Figure 34b Show Figure 30 A schematic top view of a child safety seat subjected to a side impact;

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

[0107] Figure 36 Show Figure 35 An exploded view of the child safety seat shown;

[0108] Figure 37 Show Figure 35 a cross-sectional view of the first protrusion shown;

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

[0110] Figure 39 Show Figure 38 An exploded view of the child safety seat shown;

[0111] Figure 40 Show Figure 38 a cross-sectional view of the first protrusion shown;

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

[0113] Figure 42 Show Figure 41 A front view of the child safety seat shown;

[0114] Figure 43 Show Figure 41 An exploded view of the child safety seat shown;

[0115] Figure 44 Show Figure 41 A front view of the seat cushion is shown.

[0116] Reference numerals:

[0117] 10. Child safety seat; 100. Seat body; 110. Seat portion; 120. Backrest portion; 130. Seat wing portion; 130a. Inner side of the seat wing portion; 130b. Outer side of the seat wing portion; 131. First connecting portion; 132. Groove;

[0118] 20. Child's head; 21. Child; 200. Headrest assembly; 210. Rigid layer; 211. Headrest support portion; 2111. Headrest support surface; 212. Headrest side wings; 220. Cushioning layer; 220a. First inner side surface; 200b. Second inner side surface; 221. First protrusion of the headrest; 2211. First surface; 2212. Second surface; 2213. Ridge line; 2214. End surface; 215. Male headrest buckle; 225. Female headrest buckle; 222. Second protrusion of the headrest; 2221. Third surface; 2222. Fourth surface; 223. Planar portion; 230. Cushioning protrusion; 240. Elastic cushioning member; 250. Head protection block; 250a. First end; 250b. Second end.

[0119] 30. Intrusion structure; 300. Side impact protection block; 310. First protrusion of the seat; 311. Engaging portion; 312. Retaining portion; 320. Second protrusion of the seat; 330. Third protrusion of the seat;

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

[0121] 500, elastic buffer;

[0122] S1, accommodating space; S2, avoiding space;

[0123] L1, the projected center line of the headrest side wing; L2, the horizontal center line of the seat side wing;

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

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

[0126] t1, thickness of the side wings of the headrest; t2, thickness of the cushioning layer;

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

[0128] Figure 1 and Figure 2 A headrest assembly 200 known to the inventor is shown. Figure 1 The headrest assembly 200 includes a headrest support portion 211 extending in the left-right direction and a headrest side wing portion 212 connected to the side of the headrest support portion 211 and extending to the side and front. Optionally, two headrest side wings 212 are provided, connecting the left and right sides of the headrest support portion 211 respectively. The headrest support portion 211 is used to support the child's neck and head, and the two headrest side wings 212 are used to protect the child's head from side impact. Figure 2 , Figure 2 for Figure 1 The headrest assembly 200 in the figure is a cross-sectional view taken along the H0-H0 line, where the H0-H0 line passes through the middle of the headrest assembly 200 in terms of vertical height. The headrest support portion 211 and the headrest side wing portion 212 are formed by gluing together an inner and outer layer structure, wherein the outer layer is a rigid layer 210 made of plastic, constituting the shell of the headrest assembly 200; the inner layer is a buffer layer 220 formed of a foamed soft elastic material such as polypropylene, constituting the inner lining of the headrest assembly 200. The surface of the buffer layer 220 at the headrest support portion 211 is a flat plane, and the surface of the buffer layer 220 at the headrest side wing portion 212 is a flat plane or an inner concave surface. Optionally, a headrest cloth cover made of a skin-friendly fabric material is also provided on the outside of the buffer layer 220 (not shown in the figure). The buffer layer 220 at the headrest side wing portion 212 and the buffer layer 220 at the headrest side wing portion 212 are one-piece or separate parts. The thickness of the cushioning layer 220 at the headrest side wing portion 212 is approximately 2 to 4 times the thickness of the cushioning layer 220 at the headrest support portion 211 to strengthen the protection against side impacts. Unless otherwise specified in this specification, the direction perpendicular to the support surface of the headrest support portion 211 is defined as the front-to-back direction, the direction perpendicular to the horizontal plane is defined as the vertical direction (also known as the up-down direction), and the direction orthogonal to the front-to-back direction and the vertical direction is defined as the left-to-right direction. The direction in which a child looks when using a safety seat is defined as the front (front side) of the front-to-back direction, and the direction opposite to the front is defined as the rear (rear side) of the front-to-back direction. The side of the rigid layer 210 and the cushioning layer 220 closer to the child's head is defined as the inner side, and the side away from the child's head is defined as the outer side.

[0129] Please see the attached Figures 3a to 3c When the vehicle carrying the child safety seat 10 encounters a collision with a vehicle from the left side of the drawing, the impacting vehicle or the intrusion structure 30 such as the door enters the passenger compartment from the left side and squeezes the left headrest wing portion 212 of the child safety seat 10 at high speed. Figure 3a The intrusion structure 30 is shown in a side collision process. The intrusion structure 30 hits the vehicle from left to right and begins to press the left headrest wing portion 212 . Figure 3b It is shown that the headrest side wing portion 212 moves to the left under the push of the intrusion structure 30 , and the cushioning layer 220 on the inner side of the headrest side wing portion 212 begins to press the child's head 20 . Figure 3c The figure shows that the child's head 20 is pushed by the side wings 212 of the headrest, and the child's head 20 is accelerated from a static state to a speed having the same speed as the side wings 212 of the headrest. Figure 3a to Figure 3b The total duration of the collision process is about 200 milliseconds. Figure 3b and Figure 3c), the child's head 20 squeezes the cushioning material inside the headrest wing portion 212, causing the cushioning material to sag due to elastic deformation, thereby extending the acceleration time of the child's head 20, thereby reducing the acceleration of the child's head 20 during the collision and preventing the child from being injured. Figure 3c It can be seen that when the child's head 20 presses the cushioning material of the headrest side wing portion 212, the child's head 20 sinks into the depression of the cushioning material and basically does not roll or slide relative to the surface of the cushioning material. Figure 3c The dotted area in FIG. 2 represents the position to which the child's head 20 moves after the collision, that is, the child's head 20 moves to the right during the collision.

[0130] Please note that Figure 1 FIG3 is only a child safety seat device known to the inventor, and does not represent that the device belongs to the prior art.

[0131] Figure 4 A child safety seat 10 is shown. This child safety seat 10 is suitable for installation on a movable infant carrier. The carrier can be a car seat, a stroller handlebar, or any other carrier suitable for installation and combination with the child safety seat 10. Examples of child safety seats 10 include, but are not limited to, infant carriers and baby carriers. The child safety seat 10 can be installed on various carriers depending on the application, broadening the application scope of the child safety seat 10 equipped with the headrest assembly 200 of this embodiment.

[0132] See also Figure 4 The child safety seat 10 includes a headrest assembly 200 and a seat body 100. The seat body 100 is used to support and secure 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 this embodiment can be adjusted relative to the seat body 100 by setting a slide groove, a slide rail, etc., so as to cope with the body shapes of infants and young children of different age groups. The sliding connection structure between the headrest assembly 200 and the seat body 100 is not limited here. The seat body 100 includes a seat portion 110, a backrest portion 120 and a pair of seat headrest side wings 130.

[0133] See also Figures 5 to 10c , an embodiment of the present application provides a headrest assembly 200. Figure 5 and Figure 6As shown, the headrest assembly 200 includes a rigid layer 210 and a buffer 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 buffer layer 220 can be composed of one or more elastic materials such as expanded polyethylene (EPE), expanded polypropylene (EPP), expanded polystyrene (EPS), and a composite material of expanded polyethylene and polystyrene (EPO), and can mitigate the impact of collisions on the child's head 20 by elastic deformation. The rigid layer 210 includes a headrest support portion 211 for supporting a child's head 20 and a pair of headrest wings 212 connected to the left and right ends of the headrest support portion 211. The cushioning layer 220 attached to the headrest support portion 211 and / or the headrest wings 212 of the rigid layer 210 also forms a portion of the headrest support portion 211 and / or the headrest wings 212. A headrest support surface 2111 is formed on the front side of the headrest support portion 211 to support the child's head 20. The headrest support surface 2111 is the surface of the cushioning layer 220 that faces the child's head 20. The headrest wings 212 extend forward and outward relative to the headrest support portion 211. Furthermore, a headrest support surface convex portion 2111a is formed above the headrest support surface 2111. The headrest support surface 2111 extends in the left-right direction to limit the range of movement of the child's head 20.

[0134] See also Figure 6 and Figure 7 The buffer layer 220 is detachably fixed to the surface of the rigid layer 210 through the cooperation between the headrest male buckle 215 provided on the rigid layer 210 and a pair of headrest female buckles 225 provided on the buffer layer 220. In this embodiment, the rigid layer 210 is a double-layer hollow structure formed by two plastic shell components spliced together front and back. The buffer layer 220 is an integral piece, including a portion for covering the inner side surface of the headrest support portion 211 and a portion covering the inner side surfaces of the two headrest side wings 212. In other embodiments, the rigid layer 210 can be a single-layer structure composed of a single shell, and the buffer layer 220 can include multiple independent elastic buffer parts. For example, the buffer layer 220 is two independent buffer parts that only cover the inner side surfaces of the two headrest side wings 212. This is not limited here.

[0135] Figure 8 、 Figure 9a and Figure 9b yes Figure 5The cross-sectional view is taken along the line H2-H2, where the plane of the line H2-H2 passes through the geometric center of the headrest assembly in the vertical direction. Figure 8 The headrest support portion 211 and the pair of headrest side wings 212 together form a U-shaped accommodation space S1 for accommodating the child's head. The opening of the accommodation space S1 faces forward. When a child sits in the child safety seat 10, the child's head is completely accommodated in the accommodation space S1. The back of the head can abut the head support surface 2111 of the headrest support portion 211, and the side of the head is located between the two headrest side wings 212 to protect the child's head from injury from side impact (see Figure 10a In addition, since the left side headrest wing portion 212 and the right side headrest wing portion 212 are mirror-symmetrical, the following description will only take the side headrest wing portion 212 on one side as an example.

[0136] The cushioning layer 220 on the inner side of the headrest wing portion 212 has a first headrest protrusion 221. The first headrest protrusion 221 is made of an elastic cushioning material. In this embodiment, the first headrest protrusion 221 and the cushioning layer 220 are integrally formed. In other embodiments, the first headrest protrusion 221 is fixed to the cushioning layer 220 or the rigid layer 210 by insertion or gluing, which is not particularly limited here. The first headrest protrusion 221 has a first surface 2211 located away from the head support surface 2111 in the front-to-back direction, a second surface 2212 adjacent to the head support surface 2111, and two end surfaces 2214 located at the upper and lower ends. The rear end of the first surface 2211 is connected to the front end of the second surface 2212, which is located at the front end of the headrest 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 two end surfaces 2214, respectively. The first surface 2211 is located on the front side of the first surface 2211, that is, the first surface 2211 is closer to the opening of the storage space than the first surface 2211. The first surface 2211 is configured to be inclined from back to front in a direction away from the storage space S1, so that the opening of the storage space S1 has an outward-expanding shape. The first surface 2211 and the second surface 2212 are generally planar. The ridge line 2213 of the first protrusion 221 of the headrest constitutes the boundary between the first surface 2211 and the second surface 2212. The first surface 2211 and the second surface 2212 are respectively located on the front and rear sides of the ridge line 2213 in the front-to-back direction.

[0137] See also Figures 10a to 10cIn the event of a side collision, the child's head 20 will first impact the second surface 2212. Accordingly, the second surface 2212 applies a force to the back (occipital region) of the child's head 20, causing it to rotate along the ridgeline 2213 after impacting the second surface 2212. The front of the child's head 20 then impacts the first surface 2211, thereby reducing the head's left-right acceleration. The first surface 2211 and the second surface 2212 have an angle of less than 180 degrees, providing a clearance space S2 in front of the first surface 2211 for head rotation. This angle adjusts the speed of head rotation. Details will be described below.

[0138] Reference Figure 9b , an angle β is formed between the first surface 2211 and the second surface 2212, and the angle β is less than 180 degrees, thereby forming an avoidance space S2 for head rotation between the front of the first surface 2211 and the child's head. The size of the avoidance space S2 can be represented by the angle between the extension of the first surface 2211 and the second surface 2212, or by the angle γ between the first surface 2211 and the straight line L2 in the front-to-back direction. In this embodiment, the angle β can be selected between 90 degrees and 150 degrees. When the angle β is greater than 90 degrees, the thickness of the buffer layer 220 corresponding to the second surface 2212 is thicker, which can provide higher pressure resistance. When the angle β is less than 150 degrees, the avoidance space S2 can be increased, the rotation time of the child's head can be prolonged, and the acceleration of the child's head in the left and right directions can be reduced. For example, in this embodiment, the angle between the extension of the first surface 2211 and the head support surface 2111 is approximately 40 degrees, and the angle β between the extension of the first surface 2211 and the straight line L2 in the front-back direction is 50 degrees. The angle between the second surface 2212 and the first surface 2211 is approximately 135 degrees, and the angle α between the second surface 2212 and the head support surface 2111 is approximately 95 degrees. In this embodiment, the first surface 2211 and the second surface 2212 are both flat planes. In some embodiments, the first surface 2211 or the second surface 2212 is an irregular shape, such as a cylinder or an ellipsoid. In this case, the angle between the first surface 2211 and the second surface 2212 can be the angle at a cross-section passing through the midpoint of the headrest assembly 200 in the vertical height, such as Figure 9b The angle β.

[0139] In addition, the thickness of the buffer layer 220 corresponding to the ridge line 2213 is greater than the thickness of the buffer layer 220 corresponding to the first surface 2211 and the second surface 2212. Figure 9bOn the same horizontal plane, the thickness t2 of the cushioning layer 220 corresponding to the ridgeline 2213 is greater than the thickness of the cushioning layer 220 at the same vertical height on the first surface 2211 or the second surface 2212. For another example, the thickness t1 of the headrest side wing portion 212 (including the cushioning layer and the rigid layer) corresponding to the ridgeline 2213 is greater than the thickness of the headrest side wing portion 212 corresponding to the first surface 2211 or the second surface 2212. For example, the thickness t2 of the cushioning layer 220 corresponding to the ridgeline 2213 of the headrest first protrusion 221 satisfies the requirement of being greater than 20 mm and less than 60 mm. Optionally, the second surface 2212 (including the ridge line 2213) is located on the rear side of the middle line L1 of the entire headrest side wing portion 212 (i.e., located on the rear side of the rear 1 / 2 of the headrest side wing portion 212 in the front-to-back direction), so that when the head collides with the second surface 2212, the direction of 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 direction of the force applied by the second surface 2212 can be considered to originate from the point of contact between the child's head 20 and the second surface 2212 and extend perpendicularly to the second surface 2212. In some embodiments, the second surface 2212 is located behind the rear 1 / 3 of the headrest wing portion 212 in the front-to-back direction to further increase the torque of the applied force and thereby increase the initial velocity of rotation. In yet other embodiments, the second surface 2212 is located behind the rear 1 / 4 of the headrest wing portion 212 in the front-to-back direction, further enabling a younger child's head to continue rotating after impacting the second surface. In other embodiments, the first surface 2211 may also be a convex cylindrical surface protruding toward one side of the accommodation space. The curved surface 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 slipping out of the accommodation space S1. Additionally, the thicker cushioning layer on the outer convex cylindrical surface provides better compressive resistance, preventing the head from compressing the first surface 2211, causing deformation of the cushioning material and premature sinking into depressions in the cushioning material, resulting in insufficient rotation. Optionally, the cushioning layer 220 at the ridge 2213 is thicker than the cushioning layer 220 at the front end of the first surface 2211, thereby creating an avoidance space S2 that allows the head to rotate after impacting the second surface 2212. In yet other embodiments, the headrest's first convex portion 221 is located in the rear half of the headrest's side wings 212 in the front-to-back direction, meaning that both the first surface 2211 and the second surface 2212 are located in the rear half of the headrest's side wings 212 in the front-to-back direction. Optionally, the head support surface 2111 is a rough surface with anti-slip grooves, 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 this embodiment, the first headrest protrusion 221 covers the entire inner side surface of the headrest side wing portion 212. In other embodiments, the first headrest protrusion 221 may only cover a portion of the inner side surface of the headrest side wing portion 212, as will be described in detail below.

[0141] See also Figures 10a to 10b When the vehicle carrying the child safety seat 10 encounters a collision from the left, the impacting vehicle or the intrusion structure 30 such as the door enters the passenger compartment from the left and pushes the left side wing portion 212 of the headrest assembly 200 to the right ( Figure 10a The headrest wing portion 212 of the headrest assembly 200 moves to the right and collides with the relatively stationary child's head 20 ( Figure 10b ). Reference Figure 10b and Figure 10c During the collision with the headrest side wing 212, the back of the child's head 20 first collides with the second surface 2212 of the first headrest 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's head. Accordingly, the second surface 2212 applies a force from left to right to the back of the child's head 20. Since the contact surface between the second surface 2212 and the child's head is located behind 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's head 20 rotates laterally along the ridgeline of the second surface 2212 with the cervical vertebra (the rear end of the child's head 20) as the axis. During the rotation process, the child's head 20 contacts the first surface 2211 and continues to roll along the first surface 2211 to alleviate the impact on the child's head 20. In this embodiment, the first surface 2211 of the left headrest side wing 212 extends from the ridge line 2213 on the rear side of the center line L1 to the front end of the headrest side wing 212. By setting a longer guide length, the rotation speed of the child's head 20 is reduced, thereby preventing the child's head 20 from escaping from the accommodating space S1 due to excessive rotation, or spraining the cervical vertebra due to excessive rotation.

[0142] The second surface 2212 (including the ridges 2213) protrudes further toward the accommodation space S1 than the rest of the inner surface of the headrest wing portion 212. When a child's head 20 contacts the headrest wing portion 212, it first contacts the second surface 2212. The second surface 2212 is located behind the centerline L1 of the headrest wing portion 212. During a collision, the force exerted by the second surface 2212 on the child's head does not pass through the child's head's center of gravity. Therefore, the second surface 2212 guides the child's head 20 in rolling during a collision, reducing the left-right acceleration of the child's head 20 and thus protecting the child. Because the first surface 2211 and the second surface 2212 form an angle β, a head-rotating avoidance space S2 is formed in front of the first surface 2211, allowing the head to rotate into the avoidance space S2 after first impacting the second surface 2212. The first surface 2211 is inclined from back to front in the direction away from the accommodation space, forming an outwardly inclined slope to guide the head to continue rolling on the first surface 2211, so as to reduce the speed and amplitude of rolling, avoid cervical sprain or the child's head 20 from escaping the accommodation space S1. In addition, the thickness of the buffer layer 220 at the first surface 2211 gradually becomes thinner from front to back. Since the lateral acceleration of the head is large when it contacts the back side of the first surface 2211 (i.e., the area close to the second surface 2212), the thicker buffer material can achieve better buffering and vibration reduction effects. When rolling to the front of the first surface 2211, the lateral acceleration of the head is small, and only thinner buffer material is provided to avoid child injury. Therefore, it can be beneficial to save the use of buffer material, increase the activity space of the child's head 20 and improve the field of vision.

[0143] See also Figures 11 to 12 According to one embodiment of the present invention, a headrest assembly 200 is disclosed. The headrest assembly 200 includes a headrest support portion 211 and two headrest side wings 212 connected to the headrest support portion 211. The inner sides of the two headrest side wings 212 are composed of a buffer layer 220 made of a buffer material. The structure of the headrest support portion 211 and the headrest side wings 212 is the same as that of the present invention. Figures 5 to 10c The embodiments shown are basically the same and will not be described again here.

[0144] In this embodiment, the headrest support portion 211 has a head support surface 2111. One of the two headrest side wings 212 has a first inner side surface 220a on its inner surface facing the accommodating space S1, while the other of the two headrest side wings 212 has a second inner side surface 220b on its inner surface facing the accommodating space S1. The first inner side surface 220a and the second inner side surface 220b are both located on the cushioning layer 220 of the headrest side wings 212 and face each other. The head support surface 2111, the first inner side surface 220a, and the second inner side surface 220b define an accommodating space S1 for accommodating a child's head 20. When a child is seated in the safety seat, the first inner side surface 220a and the second inner side surface 220b are located on the left and right sides of the child's head 20, respectively. In the event of a side impact, the child's head 20 contacts the first inner side surface 220a or the second inner side surface 220b of the cushioning layer 220 and flips over on the first inner side surface 220a or the second inner side surface 220b, thereby protecting the child's head 20. Since the headrest side wing portions 212 on both sides are mirror-symmetrical, the following description will be made by taking the headrest side wing portion 212 on the left side of the drawing as an example.

[0145] For example, the left headrest wing portion 212 has a first inner side surface 220a. The first inner side surface 220a includes a flat surface 223 and a first headrest protrusion 221 protruding from the flat surface 223. The first headrest protrusion 221 is arranged on the rear side of the center line L1 of the headrest wing portion 212, that is, on the side close to the headrest support portion 211. The first headrest protrusion 221 has a first surface 2211 away from the head support surface 2111 in the front-to-back direction, a second surface 2212 adjacent to the head support surface 2111, and two end surfaces 2214 located at the upper and lower parts. The thickness of the cushioning layer 220 on the flat surface 223 is less than the thickness of the cushioning layer 220 on the first surface 2211. Please refer to Figure 12 , cut the headrest assembly 200 along the vertical height midline, the angle between the first surface 2211 and the second surface 2212 of the first convex portion 221 of the headrest is about 120 degrees. The first surface 2211 and the second surface 2212 are both located behind the midline L1 of the headrest side wing portion 212, thus, the headrest assembly 200 is cut along the vertical height midline, the angle between the first surface 2211 and the second surface 2212 of the headrest first convex portion 221 is about 120 degrees. Figures 5 to 10cCompared to the embodiment shown, a larger avoidance space S2 is formed in front of the first surface 2211. The first surface 2211 and the second surface 2212 are arranged to be inclined from back to front in a direction away from the accommodation space S1 (i.e., inclined outward). Exemplarily, the angle between the second surface 2212 and the head support surface 2111 is approximately 110 degrees, i.e., the angle between the second surface 2212 and the front-to-back direction is approximately 20 degrees, and the angle between the first surface 2211 and the front-to-back direction is approximately 140 degrees. The angle between the first surface 2211 and the front-to-back direction is greater than the angle between the second surface 2212 and the front-to-back direction. Optionally, the surface of the planar portion 223 is a rough surface with an anti-slip texture to reduce relative sliding of the child's head 20 when contacting the planar portion 223, thereby preventing the child's head 20 from escaping the accommodation space S1 of the headrest assembly 200 or causing excessive forward extension of the neck.

[0146] When a side impact occurs, the child's head 20 first hits the second surface 2212 of the headrest wing 212. The second surface 2212 applies a side force to the back of the child's head 20, prompting the child's head 20 to rotate. After the child's head 20 rotates, the front of the child's head 20 contacts the flat surface 223 of the headrest wing 212 and stops contacting the second surface 2212. Figures 5 to 10c Compared to the previously shown embodiment, in this embodiment, the child's head 20 can rotate at a greater angle and has a lower final velocity upon impact with the planar portion 223. This prevents the child's head 20 from rolling along the surface of the planar portion 223 after contact, thereby preventing excessive head rotation and potentially spraining the child's neck. The right headrest wing portion 212 has a second inner side surface 220b, which is substantially identical to the first inner side surface 220a and will not be further described herein.

[0147] See also Figures 13 and 14 According to one embodiment of the present invention, a headrest assembly 200 is disclosed. The headrest assembly 200 includes a headrest support portion 211 and two headrest side wings 212 connected to the headrest support portion 211. The inner sides of the two headrest side wings 212 are composed of a buffer layer 220 made of a buffer material. The structure of the headrest support portion 211 and the headrest side wings 212 is similar to that of the present invention. Figures 5 to 10c The embodiments shown are basically the same and will not be described again here.

[0148] In this embodiment, the headrest support portion 211 has a head support surface 2111. One of the two headrest side wings 212 has a first inner side surface 220a on its inner surface, facing the accommodating space S1. The other of the two headrest side wings 212 has a second inner side surface 220b on its inner surface, facing the accommodating space S1. The first inner side surface 220a and the second inner side surface 220b are both located on the cushioning layer 220 of the headrest side wings 212 and face each other. The head support surface 2111, the first inner side surface 220a, and the second inner side surface 220b define an accommodating space S1 for accommodating a child's head 20.

[0149] See also Figure 14 A pair of buffering protrusions 230 are provided on the buffer layer 220. The buffering protrusions 230 are detachably mounted at the angle between the headrest support portion 211 and the headrest side wings 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 buffering protrusions 230 from falling off when colliding with the child's head 20.

[0150] The material density of the buffer protrusion 230 is less than the material density of the buffer layer 220 to avoid insufficient avoidance space S2 due to the depression of the buffer layer 220 below the buffer protrusion 230. Optionally, the indentation hardness of the buffer material constituting the buffer protrusion 230 is less than the indentation hardness of the buffer material constituting the buffer layer 220; or the buffer materials constituting the buffer protrusion 230 and the buffer 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 using a standard instrument under specified conditions, usually expressed in Newtons (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] See Figure 13 The vertical height of the cushioning protrusion 230 is half the vertical height of the headrest side wings 212. The cushioning protrusion 230 is positioned at the center of the cushioning layer 220 in the vertical direction, with the centerline H4-H4 of the headrest side wings 212 passing through the cushioning protrusion 230. This reduces the amount of cushioning material required and allows for comfort for children of different ages. Each cushioning protrusion 230 has a first surface 2211 located away from the head support surface 2111 in the front-to-back direction and a second surface 2212 located adjacent to the head support surface 2111. The first surface 2211 is formed of two flat surfaces with different slopes in the front-to-back direction, thereby enhancing the indentation hardness of the first surface 2211 and preventing excessive concavity due to elastic deformation when the child's head 20 contacts the first surface 2211. The cushioning protrusion 230 is located behind the centerline L1 of the headrest side wings 212, meaning that both the first surface 2211 and the second surface 2212 are located behind the centerline L1.

[0152] See also Figures 15 and 16 According to one embodiment of the present invention, a headrest assembly 200 is disclosed.

[0153] The headrest assembly 200 includes a headrest support portion 211 and two headrest side wings 212 connected to the headrest support portion 211. The inner sides of the two headrest side wings 212 are composed of a buffer layer 220 made of a buffer material. The structure of the headrest support portion 211 and the headrest side wings 212 is the same as that of the present invention. Figures 5 to 10c The embodiments shown are basically the same and will not be described again here.

[0154] In this embodiment, the headrest support portion 211 has a head support surface 2111. One of the two headrest wings 212 has a first inner side surface 220a on its inner surface, facing the accommodating space S1. The other of the two headrest wings 212 has a second inner side surface 220b on its inner surface, facing the accommodating space S1. The first inner side surface 220a and the second inner side surface 220b are both located on the cushioning layer 220 of the headrest wings 212 and face each other. The headrest support surface 2111, the first inner side surface 220a, and the second inner side surface 220b define an accommodating space S1 for accommodating a child's head 20. Given the mirror symmetry of the two headrest wings 212, the following description will use the headrest wing 212 on the left side of the drawing as an example.

[0155] For example, the left headrest wing portion 212 has a first inner side surface 220a. The first inner side surface 220a includes a planar portion 223, a first headrest protrusion 221 protruding from the planar portion 223, and a second headrest protrusion 222 protruding from the planar portion 223. The first headrest protrusion 221 is located at the end of the first side surface close to the headrest support portion, and the second headrest protrusion 222 is located at the end of the first inner side surface 220a close to the opening of the accommodating space S1. The first headrest protrusion 221 is located behind the centerline L1 of the headrest wing portion 212, while the second headrest protrusion 222 is located in front of the centerline L1 of the headrest wing portion 212. The distance between the second headrest protrusion 222 on the first inner side surface 220a of the headrest wing portion 212 on the left side and the second headrest protrusion 222 on the second inner side surface 220b of the headrest 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 accommodating space S1 is retracted inward in the left-right direction. The first headrest protrusion 221 is used to allow the child's head 20 to rotate in the event of a side impact, while the second headrest protrusion 222 is used to limit the range of movement of the child's head 20 in the front-to-back direction during rotation, thereby preventing the child's head 20 from escaping the accommodating space S1 or causing excessive extension or twisting of the neck.

[0156] The first headrest protrusion 221 is located at the end of the first inner side surface 220a near the headrest support portion. The first headrest protrusion 221 has a first surface 2211 located away from the headrest support surface 2111 in the front-to-back direction, and a second surface 2212 located adjacent to the headrest support surface 2111. The second headrest protrusion 222 has a third surface 2221 located near the opening of the accommodating space S1 in the front-to-back direction, and a fourth surface 2222 located near the headrest support surface 2111. Exemplarily, the angle between the third surface 2221 and the fourth surface 2222 is an acute angle less than 90 degrees. The thickness of the cushioning layer 220 at the planar portion 223 is less than the thickness of the cushioning layer 220 at the first surface 2211 and the second surface 2212. For details regarding the first headrest protrusion 221, please refer to other embodiments of the present application and will not be repeated here.

[0157] There is a groove between the first protrusion 221 of the headrest and the second protrusion 222 of the headrest. The first surface 2211 of the first protrusion 221 of the headrest, the fourth surface 2222 of the second protrusion 222, and the flat portion 223 together constitute the inner wall of the groove. Optionally, an elastic buffer 240 is filled inside the groove so that the first inner side surface 220a of the headrest side wing 212 is roughly flat, thereby improving user comfort. The elastic buffer 240 and the buffer layer 220 covered by the elastic buffer 240 constitute the first area A1 of the first inner side surface 220a, and the buffer layer 220 at the second surface 2212 constitutes the second area A2 of the first inner side surface 220a. The indentation hardness of the first area A1 is less than the indentation hardness of the second area A2. In other words, the indentation hardness of the elastic buffer 240 is less than the indentation hardness of the buffer layer 220. Optionally, the indentation hardness of the cushioning material constituting the elastic cushioning member 240 is less than the indentation hardness of the cushioning material constituting the cushioning layer 220; or the cushioning material constituting the elastic cushioning member 240 and the cushioning layer 220 is the same, but the density of the cushioning material constituting the elastic cushioning member 240 is less than the density of the cushioning material constituting the cushioning layer 220. The fourth surface 2222 is substantially perpendicular to the first inner side surface 220a to prevent the elastic cushioning member 240 from sliding forward when the head strikes the elastic cushioning member 240.

[0158] See also Figures 17 and 18 One 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 wings 212. The headrest side wings 212 each have a first inner side surface 220a and a second inner side surface 220b. Given the mirror symmetry of the headrest side wings 212, the following description will use the first inner side surface 220a of the headrest side wing 212 on the left side of the drawing as an example.

[0159] The first inner side surface 220a includes a flat surface 223 and a second headrest protrusion 222 protruding from the flat surface 223. The second headrest protrusion 222 is located at the end of the first inner side surface 220a near the opening of the accommodation space S1. The second headrest protrusion 222 is located forward of the center line L1 of the headrest side wing 212. The distance between the second headrest protrusion 222 on the first inner side surface 220a of the left headrest side wing 212 and the second headrest protrusion 222 on the second inner side surface 220b of the right headrest side wing 212 is smaller than the average distance between the first inner side surface 220a and the second inner side surface 220b, thereby shrinking the opening of the accommodation space S1 inward in the left-right direction. The second headrest protrusion 222 is used to limit the front-to-back movement of the child's head 20 during rotation, preventing the child's head 20 from escaping the accommodation space S1 or causing excessive extension or twisting of the neck. The second headrest protrusion 222 has a third surface 2221 located proximal to the opening of the accommodation space S1 in the front-to-back direction, and a fourth surface 2222 located proximal to the head support surface 2111. For example, the angle between the third surface 2221 and the fourth surface 2222 is an acute angle less than 90 degrees. The thickness of the cushioning layer 220 on the planar portion 223 is less than that on the first surface 2211 and the second surface 2212. For details regarding the second headrest protrusion 222, please refer to other embodiments of this application and will not be further described here.

[0160] When encountering a sideways impact, the child's head 20 first contacts and presses against the planar surface 223 of the inner side surface (for example, the first inner side surface 220a) of the headrest's side wing portion 212. The first inner side surface 220a is an inclined surface that tilts outward relative to the front-to-back direction. During the compression of the elastic buffer 240, the child's head 20 may roll or slide against the surface of the planar surface 223 toward the opening of the accommodation space S1. When the child's head 20 slides onto the second protrusion 222 of the headrest, the fourth surface 2222 of the second protrusion 222 abuts against the child's head 20, preventing it from escaping from the accommodation space S1. Exemplarily, the fourth surface 2222 is a rough surface with dotted anti-slip texture or anti-slip ribs.

[0161] See also Figures 19 to 20 , an embodiment of the present application provides a headrest assembly 200. This embodiment of the present application Figures 15 and 16 The embodiment shown in the figure eliminates the first headrest protrusion 221. A groove is formed between the head support surface 2111 and each of the second headrest protrusions 222, and an elastic buffer 240 is provided in the groove. The second headrest protrusion 222 is located in front of the center line L1 of the headrest side wing 212, and the center line L1 passes through the elastic buffer 240. The indentation hardness of the elastic buffer 240 is lower than the indentation hardness of the second headrest protrusion 222. For the structure of the second headrest protrusion 222, please refer to the present application. Figures 15 and 16The embodiment shown and Figures 17 and 18 The embodiments shown are not described in detail here.

[0162] When a side impact occurs, the child's head 20 first contacts and presses against the elastic cushioning member 240 on the inner side surface (for example, the first inner side surface 220a) of the headrest's side wing portion 212. The first inner side surface 220a is inclined outward relative to the front-to-back direction. During this process, the child's head 20 may roll or slide against the surface of the elastic cushioning member 240 toward the opening of the accommodation space S1. When the child's head 20 slides onto the headrest's second protrusion 222, the fourth surface 2222 of the second protrusion 222 abuts against the child's head 20, preventing the child's head 20 from escaping from the accommodation space S1.

[0163] See also Figures 21 to 22 One embodiment of the present application provides a headrest assembly 200. A pair of first headrest protrusions 221 and a pair of second headrest protrusions 222 are provided on the cushioning layer 220 of the headrest assembly 200. The first headrest protrusion 221 is located on the rear side of the center line L1 of the headrest side wing portion 212, and the second headrest protrusion 222 is located on the front side of the center line L1 of the headrest side wing portion 212, and the center line L1 passes through the groove formed between the first headrest protrusion 221 and the second headrest protrusion 222. The first headrest protrusion 221 is detachably mounted at the angle between the headrest support portion 211 and the headrest side wing portion 212, and the second headrest protrusion 222 is detachably mounted at the end of the headrest side wing portion 212 close to the opening of the accommodating space S1, so that the opening of the accommodating space S1 is retracted inward.

[0164] See also Figure 23 to Figure 25. An embodiment of the present application provides a headrest assembly 200. The headrest assembly 200 also includes a head protection block 250. There are multiple head protection blocks 250, which are respectively provided on the left and right headrest side wings 212. A through hole is formed on the headrest side wing 212, which passes through the rigid layer 210 and the cushioning layer 220 of the headrest side wing 212. The head protection block 250 passes through the through hole and is movably provided on the headrest side wing 212. Optionally, the through hole and the head protection block 250 are both located on the rear side of the center line L1 of the headrest side wing 212 (that is, on the rear side of the rear 1 / 2 of the headrest side wing 212 in the front-to-back direction). The end of the head protection block 250 facing the accommodating space S1 is the first end 250a, which is made of cushioning material and is used to protect the child's head 20. The end of the head protection block 250, distal from the accommodation space S1, is a second end 250b. It is made of a cushioning material or a hard material and is designed to abut against intrusion structures during a side impact. The first end 250a has a first surface 2211 and a second surface 2212 connected to the first surface 2211. The first and second surfaces 2211 and 2212 form a substantially 90-degree angle, and both are located behind the centerline L1. Optionally, the second end 250b of the head protection block 250 is a shell made of PP material, while the first end 250a of the head protection block 250 is an elongated, EPP-shaped cushioning member embedded within the shell.

[0165] The head protection block 250 can be movably connected to the headrest side wing portion 212 and can move between a first use position and a second use position relative to the headrest side wing portion 212. When the head protection block 250 is in the second use position, the first end 250a plays a role in the present application. Figures 5 to 10c The first protrusion 221 of the headrest has the same function as the one in the embodiment shown, and will not be described in detail here. Figure 10a When the head protection block 250 is in the first use position, the first end 250a extends a short distance into the accommodation space S1 (or is aligned with the inner surface of the headrest assembly 200), while the second end 250b extends a long distance beyond the outer surface of the headrest wing portion 212, thereby reducing the head protection block 250 from encroaching on the accommodation space S1. When the head protection block 250 is in the second use position, the first end 250a extends a long distance and protrudes beyond the inner surface of the headrest wing portion 212, while the second end 250b extends a short distance beyond the outer surface of the headrest wing portion. This allows the child's head 20 to first contact the first end 250a of the head protection block 250 and cause rotation in the event of a side impact.

[0166] See also Figure 10bWhen the head protection block 250 is in the second use position, the first end 250a of the head protection block 250 protrudes from the cushioning layer 220 and has a first surface 2211 and a second surface 2212. The first surface 2211 is located in front of the second surface 2212, and the first surface 2211 and the second surface 2212 form an angle of 90 to 150 degrees. The first end 250a can be referred to as the first protrusion 221 of the headrest in other embodiments and will not be described again here.

[0167] The headrest wings 212 are provided with one-way latches for locking the head protection block 250, preventing it from moving from the first position to the second position while allowing the user to move it back from the second position to the first position. Exemplarily, the one-way latches can be inclined grooves formed on the headrest wings 212 that taper inward from the outside, or slots that engage with protrusions on the head protection block 250. Optionally, the head protection block 250 can be removed from the headrest wings 212 to increase the width of the headrest assembly 200's accommodation space S1, thereby accommodating older children.

[0168] During normal use of the child safety seat 10, the head protection block 250 is configured in the first use position and locked by the one-way buckle. In the event of a lateral impact, the intrusion structure first strikes the second end 250b of the head protection block 250, which protrudes from the surface of the headrest wing portion 212. Under the impact of the intrusion structure, the head protection block 250 breaks through the one-way buckle and moves from the first use position to the second use position, causing the first end 250a of the head protection block 250 to protrude from the inner surface of the headrest assembly 200. After contacting the second surface 2212 of the first end 250a of the head protection block 250, the child's head 20 rotates and then strikes the cushioning layer 220 of the headrest assembly 200, reducing the lateral acceleration of the child's head 20.

[0169] Figure 26 Figure 34 shows a child safety seat according to an embodiment of the present application. Figure 26 , Figure 26 A child safety seat 10 is shown. This child safety seat 10 is suitable for installation on a movable infant carrier. The carrier can be a car seat, a stroller handlebar, or any other carrier suitable for installation and combination with the child safety seat 10. Examples of child safety seats 10 include, but are not limited to, infant carriers and baby carriers. The child safety seat 10 can be installed on various carriers depending on the application, broadening the application range of the child safety seat 10 of this 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 the child's hips, a backrest portion 120 provided above the seat portion 110, and seat side wings 130 provided on the sides of the backrest portion 120. Optionally, a pair of seat side wings 130 are provided, one on each side of the backrest portion 120. The seat portion 110, the backrest portion 120, and the pair of seat side wings 130 together form a storage space S1 for shielding the child (see FIG. 1 ). Figure 32 ). Optionally, the child safety seat 10 may further include a headrest assembly 200 mounted on the backrest 120, and the headrest assembly 200 may be mounted on the backrest 120 of the seat body 100 so as to be movable up and down. In this embodiment, the seat 110, the backrest 120 and the seat side wings 130 are formed as a single piece from a hard material such as polyethylene. In some embodiments, the seat 110, the backrest 120 and the seat side wings 130 may be separate parts. For example, the backrest 120 may be pivotally connected to the seat 110 to adjust the inclination angle of the backrest 120 relative to the seat 110. In other embodiments, the seat side wings 130 include side wings connected to the backrest 120 and armrests connected to the sides of the seat 110. The side wings and armrests may be separate parts or partially connected. In addition, the child safety seat 10 is provided with connectors such as ISOFIX and Latch for fixing the child safety seat 10 to the seat of the vehicle.

[0171] Unless otherwise specified in this specification, the direction perpendicular to the seating 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 fore-aft direction, and the direction perpendicular to both the fore-aft and vertical directions is defined as the left-right direction (also referred to as the lateral direction). The direction of vision of a child while using the child safety seat 10 is defined as the front (front side) of the fore-aft direction, and the direction opposite to the front is defined as the rear (rear side) of the fore-aft direction. The side closer to the child (or the accommodation space S1) is defined as the inner side, and the side farther from the child (or the accommodation space S1) is defined as the outer side.

[0172] The two seat side wings 130 shield the child's torso from the left and right sides respectively to prevent foreign objects from injuring the child from the side. The seat side wings 130 are generally flat and have an inner side 130a close to the child and an outer side 130b away from the child. Figure 30 , viewed from the front-to-back direction, the rear ends of the seat wing portions 130 are connected to the left and right edges of the backrest portion 120, and the front ends of the seat wing portions 130 are inclined away from the accommodation space (i.e., toward the outside), so that the accommodation space S1 has an outwardly expanding V-shaped opening. Figure 29 and Figure 32When viewed from above and below, the upper ends of the seat wings 130 are inclined away from the accommodation space (i.e., outward). The left and right seat wings 130 form a V-shape, with the upper ends of the seat wings 130 positioned further outward than the lower ends. Therefore, in the event of a side impact, the front ends of the seat wings 130 typically contact the intrusion structure before the rear ends, and the upper ends of the seat wings 130 contact the intrusion structure before the lower ends. Furthermore, the seat wings 130 vertically extend from bottom to top, defining a first region A1, a third region A3, and a second region A2. The first region A1 abuts the seat 110, corresponding to the child's hips. The second region A2 abuts the headrest assembly 200, corresponding to the child's shoulders. The third region A3 is located between the first and second regions A1, separating them. The second region A2 is located at a higher level than the first region A1. In addition, Figure 32 In the child safety seat 10, a horizontal centerline L2 divides the seat wing portion 130 into two portions of equal vertical height. The first area A1 is located below the horizontal centerline L2 of the seat wing portion 130, and the second area A2 is located above the horizontal centerline L2 of the seat wing portion. The horizontal centerline L2 passes through the third area A3. The child safety seat 10 also includes a side impact protection block 300. The side impact protection block 300 can be located on at least one of the outer side surface of the first area A1, the inner side surface of the first area A1, the outer side surface of the second area A2, the inner side surface of the second area A2, the outer side surface of the third area A3, or the inner side surface of the third area A3.

[0173] See also Figures 26 to 28 In this embodiment, the side impact protection block 300 includes a pair of first seat protrusions 310 located on the inner side surfaces of the first area A1 of the pair of seat side wings 130, a pair of second seat protrusions 320 located on the inner side surfaces of the second area A2, and a pair of third seat protrusions 330 located on the outer side surfaces of the third area A3. The height of the second seat protrusions 320 is higher than that of the third seat protrusions 330, and the height of the third seat protrusions 330 is higher than that of the first seat protrusions 310. In other embodiments, the second protrusions are located on the inner side surfaces of the second area A2 and the third area A3 (e.g., Figure 37 The third protrusion may also be mounted on the outer side surface of the third area A3 of a single seat wing portion 130, or on the outer side surfaces of both the second area A2 and the third area A3. This will not be described in detail here. Given the mirror symmetry of the pair of seat wing portions 130, the following description will only use one seat wing portion 130 as an example.

[0174] The first seat protrusion 310 is provided at the lower portion (first area A1) of the seat wing 130, adjacent to the upper surface of the seat 110, and protrudes from the inner side surface 130a of the seat wing 130 toward the accommodating space S1, so that the inner side surface 130a of the seat wing 130 is stepped. Figure 30 The first distance D1 between the inner side surfaces of the pair of first areas A1 of the two seat side wings 130 (i.e., the inner side surfaces of the first protrusions 310 of the seat portion) is substantially equal to the width of the child's hips, and the second distance D2 between the inner side surfaces of the pair of second areas A2 (i.e., the inner side surfaces of the second protrusions 320 of the seat portion) is greater than the width of the child's shoulders. The first distance D1 is smaller than the second distance D2 (see FIG. Figure 32 and Figure 33a A groove is formed between the first seat protrusion 310 and the headrest assembly 200, and the first seat protrusion 310, the headrest assembly 200, and the seat side wings 130 form an avoidance space S2. As a result, when a child sits on the child safety seat 10, the pair of first seat protrusions 310 clamp the child's hips from both sides (see Figure 33a ), so that the child's hips can be fixed between the two first protrusions 310 of the seat portion, while a certain amount of movement space is retained between the child's shoulders and the inner side surface 130a of the seat side wing portion 130.

[0175] The first protrusion 310 of the seat can be made of a block made of hard materials such as polypropylene, high-density polyethylene, or made of at least one soft cushioning material of higher density foamed polyethylene, foamed polystyrene, and a composite material of foamed polyethylene and polystyrene, or the shell part of the first protrusion is composed of hard materials such as polypropylene, and the shell is filled with soft cushioning materials such as foamed polyethylene, air bags, soft glue or honeycomb aluminum plates, so as to stably fix the child while avoiding squeezing the child in a collision.

[0176] See also Figure 27 and Figure 31The outer surface of the first protrusion 310 of the seat is provided with a snap-fit portion 311 for connecting to the seat body 100. The snap-fit portion 311 can be a T-shaped hook that can slideably engage with the first connecting portion 131 located on the inner surface 130a of the seat side wing portion 130, so that the first protrusion 310 of the seat can be removably fixed to the seat side wing portion 130. After removing the first protrusion 310 of the seat, the width of the accommodating space S1 can be expanded, and the seat body 100 can accommodate larger children. Generally speaking, larger children (for example, children with a height exceeding 1100 mm) can benefit from the side protection provided by the vehicle's side curtain airbags, while smaller children may not be protected by the side curtain airbags and require additional side impact protection measures. Details will be explained below. In some embodiments, the first seat protrusion 310 and the seat side wing 130 may be integrally formed. In other embodiments, the first seat protrusion 310 may be secured to the seat 110 via a snap-fit portion 311. In still other embodiments, the first seat protrusion 310 is secured to the backrest 120 via the snap-fit portion 311. As long as the first seat protrusion 310 can secure the child's hips, the connection method between the first seat protrusion 310 and the seat body 100 is not particularly limited. Furthermore, in some embodiments, the first seat protrusion 310 is secured to the seat 110 via the snap-fit portion 311. The backrest 120 is pivotally connected to the seat 110. The two seat side wings 130 are respectively connected to the left and right sides of the backrest 120 and pivot together with the backrest 120. When the backrest 120 tilts backward, the position of the first seat protrusion 310 relative to the seat remains unchanged, which can prevent the hip joint from loosening due to the movement of the first seat protrusion 310.

[0177] In addition, the front face of the first seat protrusion 310 (i.e., the face facing away from the backrest 120) is inclined toward the backrest 120, thereby forming a recessed portion at the end near the seat 110. This increases the leg room for children near the seat, while also forming a forward-projecting armrest at the front end of the top face for easy gripping by the child. The first seat protrusion 310 is roughly in the shape of an inverted trapezoid, with the top face of the first seat protrusion 310 (i.e., the face facing away from the seat 110) being longer than the bottom face of the first seat protrusion 310 (i.e., the face facing toward the seat 110). In some embodiments, the first seat protrusion 310 is part of the armrest. At least a portion of the inner side face of the first seat protrusion 310 is substantially perpendicular to the seat surface of the seat 110, supporting the child's hips from both sides and preventing them from falling sideways.

[0178] See also Figure 26 and Figure 32The second seat protrusion 320 is disposed on the upper portion of the seat side wing 130 (i.e., the second area A2). The second seat protrusion 320 can be a cushion made of a soft foam material such as sponge, foamed polyethylene, foamed polystyrene, or a composite material of foamed polyethylene and polystyrene, and is used to provide side cushioning protection for the child's shoulders. Optionally, the second seat protrusion 320 is made of a different material than the first seat protrusion 310, and the second seat protrusion 320 is made of a soft material with a lower indentation hardness than the first seat protrusion 310. Alternatively, the density of the material of the second seat protrusion 320 is lower than that of the first seat protrusion 310, making the second seat protrusion 320 softer than the first seat protrusion 310. Optionally, the interior of the second seat protrusion 320 is a hollow structure such as a honeycomb, which has a lower indentation hardness. The thickness of the second seat protrusion 320 is smaller than that of the first seat protrusion 310, allowing the child's torso greater clearance space S2 during pivoting. Optionally, 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 to 10 cm greater than the distance between the two first protrusions. Indentation hardness refers to the total force required to indent a specified depth on the surface of a soft porous material using a standard instrument under specified conditions. It is typically expressed in Newtons (N) and is used to characterize the hardness of a material. Generally, the higher the density of a material, the greater its indentation hardness.

[0179] The second seat protrusion 320 can be mounted on the inner side surface 130a of the seat side wing 130, or fixedly mounted on the lower portion of the headrest assembly 200, and can move up and down with the headrest assembly 200 to accommodate children of different sizes. Optionally, both the first seat protrusion 310 and the second seat protrusion 320 can be removed from the seat body 100 to accommodate larger children.

[0180] See also Figures 26-27 as well as Figures 29-30The third seat protrusion 330 is located on the outer surface of the center portion (third area A3) of the seat wing 130. When viewed from the top and bottom, the third seat protrusion 330 is located between the first seat protrusion 310 and the second seat protrusion 320. The second seat protrusion 320 is higher than the third seat protrusion 330, while the first seat protrusion 310 is lower than the third seat protrusion 330. The geometric center of the third seat protrusion 330 is located below the horizontal centerline L2 of the seat wing 130. This prevents the third seat protrusion 330, which protrudes from the surface of the seat wing 130, from interfering with the vehicle's side curtain airbags and causing the child safety seat 10 to tilt.

[0181] Reference Figure 30 and Figure 31 , viewed from the front-to-back direction, the third seat protrusion 330 is located at the rear end of the seat wing 130 and is adjacent to the backrest 120. The third seat protrusion 330 and the backrest 120 clamp the rear end of the seat wing 130 from both sides, thereby directly transmitting the lateral force exerted on the third seat protrusion 330 to the backrest 120, thereby preventing the seat wing 130 from breaking or falling off due to excessive bearing torque. Figure 30 The width of the third seat protrusion 330 is smaller than the maximum width of the seat wing 130, and the front end of the seat wing 130 is closer to the outside than the outer side surface of the third seat protrusion 330. When the seat wing 130 is not impacted or squeezed by an intruding structure, there is a distance D3 between the front end of the seat wing 130 and the outer side surface of the third seat protrusion 330 in the left-right direction. When the front end of the seat wing 130 is squeezed laterally by an intruding structure, it bends and deforms inward until the front end of the seat wing 130 and the outer side surface of the third seat protrusion 330 are at the same position in the left-right direction (i.e., the distance D3 is 0 mm, see FIG. 1). Figure 34b ), the outer side of the third seat protrusion 330 abuts the intrusion structure, preventing further bending of the seat wings 130. Safety seat manufacturers can set the maximum allowable deformation of the seat wings by setting the distance D3. This allows the bending deformation of the seat wings 130 to extend the total collision time and reduce harm to the child. This not only makes the child safety seat more compact, eliminating the need to disassemble the third seat protrusion 330, but also improves the collision safety of the child safety seat.

[0182] In this embodiment, the third seat protrusion 330 does not overlap with the first seat protrusion 310 or the second seat protrusion 320 in terms of height or fore-aft position. This prevents the force of a side impact on the third seat protrusion 330 from being directly transmitted to the first seat protrusion 310 or the second seat protrusion 320, thereby reducing injuries to the child. In some embodiments, the third protrusion may be located on the outer side of the first area A1 or the outer side of the second area A2, and the second protrusion may be located on the inner side of the third area A3, or may cover both the inner side of the second area A2 and the inner side of the third area A3. If the third protrusion is located on the outer side of the second area A2 and the outer side of the third area A3, and the second protrusion is located on the inner side of the second area A2 and the inner side of the third area A3, the third protrusion may be located closer to the rear end of the seat wing in the fore-aft direction than the second protrusion. In some embodiments, the child safety seat may only have the third seat protrusion 330, without the first seat protrusion 310 or the second seat protrusion 320.

[0183] Please see the attached Figures 33a to 34b , Figures 33a to 34b FIG. 3 is a schematic diagram illustrating a collision process in which the intrusion structure 30 hits the vehicle from the left side and then hits the child safety seat 10 . Figure 33a and Figure 34a It shows that in the front section of the side collision, the intrusion structure 30 approaches the child safety seat 10 from left to right; Figure 33b and Figure 34b The diagram shows that after a side collision, the intrusion structure 30 compresses the seat wing 130 of the child safety seat 10, causing the child 21 to rotate to the left. During the collision, the intrusion structure 30 first contacts the front end of the outer side 130b of the seat wing 130, causing the seat wing 130 to bend inward until the intrusion structure 30 abuts against the third seat protrusion 330 located at the rear end of the seat wing 130. The intrusion structure 30 then abuts against the seat wing 130 and the third seat protrusion 330, pushing the child safety seat 10 to the right and accelerating it to the same speed as the intrusion structure 30. The child's hips are secured to the seat by the first protrusion 310 and move rightward with the main seat. However, the child's upper limbs (including the head, arms, and shoulders) remain relatively stationary due to inertia. Consequently, the child's upper limbs rotate leftward about the hips, entering the left sideways space. They then collide with the second protrusion 320 of the seat located on the inner side of the left seat wing 130, causing it to collapse and deform, cushioning the impact on the child's shoulders. The third distance D3 between the front end of the seat wing 130 and the third protrusion 330, the sideways space S2, and the cushioning material of the second protrusion 320 help prolong the child's acceleration time during a collision, reducing the average acceleration of the child's upper limbs and preventing injury.

[0184] See also Figures 35 to 37 According to an embodiment of the present invention, another child safety seat 10 is disclosed. In this embodiment, the child safety seat 10 includes a seat body 100 and a side impact protection block 300 installed on the seat body 100. The seat body 100 includes a seat portion 110 for supporting the child's buttocks, a backrest portion 120 provided above the seat portion 110, and seat side wings 130 provided on the sides of the backrest portion 120. Optionally, a pair of seat side wings 130 are provided, which are respectively provided on the left and right sides of the backrest portion 120. The structure of the seat body 100 is the same as that of the present application. Figure 26 The embodiments shown in FIG34 are basically the same and will not be described again here.

[0185] A pair of seat first protrusions 310 are connected together by a retaining portion 312. 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, rigid material and has an L-shaped shape that adapts to the connection between the seat 110 and the backrest 120. The retaining portion 312 includes a sheet that abuts the seat 110, a sheet that abuts the backrest 120, and pockets at both ends of the sheet for accommodating the pair of seat first protrusions 310. When a child sits in the child safety seat 10, the child's hips and back simultaneously press against the retaining portion 312, 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 side surfaces of the pair of seat first protrusions 310). The retaining portion 312 has a hook (not shown) below that can be engaged with the holes in the backrest portion 120 and the seat portion 110. This allows for quick installation and removal of the pair of seat first protrusions 310 and prevents the user from accidentally installing only one seat first protrusion 310.

[0186] A recess 132 is defined on the upper portion of the inner side 130a of the seat wing 130 (corresponding to the second area A2). A second seat protrusion 320 is embedded within this recess 132. Made of a soft, cushioning foam material, this second seat protrusion 320 cushions impacts on a child's shoulders. Embedding the second seat protrusion 320 within the recess 132 further increases the second distance D2, increasing the pivoting time of the child's torso and reducing the average acceleration of the child's upper limbs during a collision, thus preventing injury.

[0187] The outer side surface 130b of the seat side wing portion 130 is provided with a seat portion third protrusion 330. The seat portion third protrusion 330 is pivotally connected to the rear end of the seat side wing portion 130 and can be in the expanded position ( Figure 35) and a folded position (not shown) that is in contact with the outer side surface 130b of the seat side wing portion 130.

[0188] See also Figures 38 to 40 According to an embodiment of the present invention, another child safety seat 10 is disclosed. In this embodiment, the child safety seat 10 includes a seat body 100 and a side impact protection block 300 installed on the seat body 100. The seat body 100 includes a seat portion 110 for supporting the child's buttocks, a backrest portion 120 provided above the seat portion 110, and seat side wings 130 provided on the sides of the backrest portion 120. Optionally, a pair of seat side wings 130 are provided, which are respectively provided on the left and right sides of the backrest portion 120. The structure of the seat body 100 is the same as that of the present application. Figure 26 The embodiments shown in FIG34 are basically the same and will not be described again here.

[0189] The side impact protection block 300 includes a pair of first seat protrusions 310, a pair of second seat protrusions 320, and a pair of third seat protrusions 330. The first and second seat protrusions 310, 320 are connected to either side of a retaining portion 312. The retaining portion 312 is a generally L-shaped sheet structure, comprising a sheet that abuts the seat 110 and a sheet that abuts the backrest 120. The sheet that abuts the backrest 120 is longer, extending from the upper surface of the seat 110 to below the headrest assembly 200. When a child sits in the child safety seat 10, the child's back presses against the retaining portion 312, preventing the first and second seat protrusions 310, 320 from falling off the seat body 100. The following description uses the first and second seat protrusions 310, 320 on one side as an example.

[0190] The second seat protrusion 320 and the first seat protrusion 310 are arranged vertically, and the thickness of the first seat protrusion 310 and the second seat protrusion 320 are approximately the same. The outer surfaces of the first seat protrusion 310 and the second seat protrusion 320 both conform to the inner surface 130a of the seat wing 130. The first seat protrusion 310 corresponds to the first area A1 of the seat wing 130, while the second seat protrusion 320 corresponds to the second area A2 and the third area A3 of the seat wing 130. The inner surfaces of the first seat protrusion 310 and the second seat protrusion 320 connect to form a vertical plane that faces the child's torso. The second seat protrusion 320 is made of a soft cushioning material. The first seat protrusion 310 has a greater hardness than the second seat protrusion 320; alternatively, the first seat protrusion 310 has a greater compression strength than the second seat protrusion 320; or alternatively, the first seat protrusion 310 has a greater density than the second seat protrusion 320. Therefore, the first seat protrusion 310 can engage the child's hip, preventing it from moving during a collision. In a side collision, the child's upper limb pivots to one side and presses against the second seat protrusion 320. The second seat protrusion 320, under pressure, depresses, creating a clearance space S2 for the child's upper limb to pivot, thereby reducing injury to the child. For example, the first seat protrusion 310 can be made of hard, high-density polyethylene, while the second seat protrusion 320 can be made of soft, highly resilient sponge. Another example is the first seat protrusion 310 made of relatively high-density expanded polyethylene, while the second seat protrusion 320 can be made of soft sponge. For another example, the first seat protrusion 310 is made of relatively high-density foamed polyethylene, and the second seat protrusion 320 is made of relatively low-density foamed polyethylene.

[0191] See also Figures 41 to 44 According to one embodiment of the present invention, another child safety seat and seat cushion are disclosed. Child safety seat 10 includes a seat body 100, which is covered with a fabric cover (not shown) made of a skin-friendly fabric material. Seat body 100 is substantially identical to conventional child safety seats and will not be further described herein.

[0192] See also Figure 44 The child safety seat 10 further includes a seat cushion 400, which is mainly made of a flexible fabric material and can be detachably connected to a child carrier such as a child safety seat, a stroller, a baby cradle, a baby carrier or a crib so as to be adaptable to children of different lengths.

[0193] The seat cushion 400 includes a main seat portion 410, a pair of side flaps 420 connected to the left and right sides of the main seat portion 410, and a first seat protrusion 310 connected to both sides of the main seat portion 410. The side flaps 420 are located at the upper portion of the main seat portion 410 (e.g., above the midline of the main seat portion 410), corresponding to the child's upper limbs (arms, shoulders, etc.), and in this embodiment, they function as a secondary protrusion. The first seat protrusion 310 is fan-shaped, corresponding to the transition surface between the seat portion 110 and the backrest portion 120. Made of a bag-shaped fabric-filled cushioning material, the first seat protrusion 310 is sewn to the main seat portion 410 and can pivot relative to the main seat portion 410 along the sewing line. The first seat protrusion 310 is located at the lower portion of the main seat portion 410 (e.g., above the midline of the main seat portion 410), corresponding to the child's hips. The thickness of the seat first protrusion 310 is greater than the thickness of the seat cushion side wing piece 420 .

[0194] See also 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 surfaces of the two first seat protrusions 310 is less than the distance between the inner surfaces of the two seat cushion side wings 420. This allows the child's upper limbs to have more lateral space than the hips when using the seat cushion. The two first seat protrusions 310 secure the child's hips from both sides, allowing the child's upper limbs to move and pivot between the two seat cushion side wings 420. In this embodiment, and in other embodiments, the seat cushion side wings 420 and the first seat protrusions 310 can also be integral, as long as the distance between the inner surfaces of the two first seat protrusions 310 is less than the distance between the inner surfaces of the two seat cushion side wings 420. Furthermore, the indentation hardness of the material of the first seat protrusions 310 is greater than the indentation hardness of the seat cushion side wings 420. For example, the filling material of the first seat protrusions 310 is polystyrene foam, while the filling material of the seat cushion side wings 420 is sponge. Furthermore, the back of the seat cushion 400 is provided with connectors such as Velcro, buttons, or clasps, which engage with the fabric cover of the seat body 100. This allows existing child safety seats to be equipped with side impact protection without modifying the seat body, simply by modifying the fabric cover, thereby reducing manufacturing costs. Furthermore, the fabric cover does not need to be removed when removing the first protrusion, making it easier to use.

[0195] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0196] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A headrest assembly, characterized in that: include: a headrest support portion having a head support surface; as well as The headrest side wing portion is connected to the side portion of the headrest support portion. A first headrest convex portion is provided on the inner side of the headrest side wing, and the first headrest convex portion has a first surface away from the head support surface and a second surface adjacent to the head support surface, and the first surface is arranged to be inclined from back to front toward the headrest side wing.

2. The headrest assembly according to claim 1, wherein: An included angle between the first surface and the second surface satisfies the requirement of being greater than 90 degrees and less than 150 degrees.

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

4. The headrest assembly according to claim 1, wherein: At least one of the first surface and the head support surface has anti-slip grooves; and / or The friction coefficient of the head support surface is greater than the friction coefficient of the first surface.

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

6. The headrest assembly according to any one of claims 1 to 4, wherein: The first protrusion of the headrest is detachably mounted on the side wing of the headrest; or, The headrest assembly further includes a head protection block having a first end and a second end, the first protrusion of the headrest being located at the first end; the head protection block is disposed on the side wings of the headrest and is movable between a first use position and a second use position; when the head protection block is in the first use position, the first end protrudes from the inner side surface of the side wings of the headrest; When the head protection block is located at the second use position, the second end protrudes from the outer side surface of the headrest side wing portion.

7. The headrest assembly according to any one of claims 1 to 4, wherein: A second headrest convex portion is further provided on the inner side of the headrest side wing portion, and a groove is formed between the first headrest convex portion and the second headrest convex portion.

8. The headrest assembly according to claim 7, wherein: An elastic buffer is provided in the groove, and the density of the elastic buffer is lower than the density of the first convex portion of the headrest.

9. The headrest assembly according to any one of claims 1 to 4, wherein: The first convex portion of the headrest is formed by stacking two or more cushioning materials, and the density of the cushioning material corresponding to the first surface is smaller than the density of the cushioning material corresponding to the second surface.

10. A child safety seat, comprising: seat; a backrest portion connected to the seat portion; as well as Two seat side wings, respectively connected to the left and right sides of the backrest; It is characterized in that the child safety seat further includes a side impact protection block protruding from the side wing of the seat, Each of the seat side wings has a first area corresponding to the child's hip, wherein the first area is located below the horizontal center line L2 of the seat side wing. The side impact protection block includes two first seat protrusions located on the inner side surface of the first area; the two first seat protrusions respectively protrude from the inner side surfaces of the two seat side wings to clamp the child's hips.

11. The child safety seat according to claim 10, wherein: The side impact protection block further includes a seat portion third protrusion, which is protrudingly provided on the outer side surface of the seat side wing portion and is higher than the seat portion first protrusion.

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