Seat cushion structure and child safety seat

Abstract

The invention discloses a seat cushion structure and a child safety seat, the seat cushion structure is suitable for being used on a seat body of the child safety seat, the seat cushion structure comprises a back cushion used for supporting the back of an infant, the back cushion is provided with a first surface and a second surface opposite to the first surface, and the first surface faces the infant; the seat cushion is used for supporting the buttocks of the infant, the back cushion is provided with a pushing part, and the pushing part promotes the first surface of the back cushion to push the back of the infant, so that the back and the head of the infant tend to be located on the same straight line; and / or, the seat cushion is provided with a blocking part, and the blocking part is used for blocking the infant from sliding downwards. According to the seat cushion structure, an infant can be effectively and safely supported, the head and the body of the infant are kept in a stretched state, the danger caused by the fact that the head of the infant is bent towards the body of the infant is avoided, and safe supporting can be provided for the infant.

Description

Technical Field

[0001] The present application relates to a seat cushion structure and a child safety seat including the seat cushion structure. Background Art

[0002] A child safety seat is a device designed specifically for children. During a vehicle ride, a child is restrained within the safety seat, which can reduce the impact force on the child in the event of a car collision or sudden deceleration, thereby reducing the harm to them and effectively improving the safety of a child during a vehicle ride.

[0003] For infants and young children who are relatively young or small in size, a seat cushion structure is usually added inside the safety seat to further support the body of the infant or young child, improving comfort and safety.

[0004] However, the design structure of existing seat cushion structures has unreasonable aspects, resulting in the body of an infant or young child easily sliding down during sitting, thus causing the head of the infant or young child to deviate from the safety protection of the headrest group; and due to the unreasonable design angle of existing seat cushion structures, when sliding down, it is easy for the head of the infant or young child to bend towards the body, and when the chin of the infant or young child touches their chest for a long time, it is easy to cause a risk of suffocation. Therefore, existing seat cushion structures cannot provide a comfortable, reliable, and safe support for infants and young children. Summary of the Invention

[0005] In view of this, the purpose of the present application is to provide a reliable and safe seat cushion structure and a child safety seat including the seat cushion structure.

[0006] To this end, according to one solution of the present application, a seat cushion structure is provided, which is applicable to a seat body of a child safety seat. The seat cushion structure includes: a backrest pad for supporting the back of an infant or young child, the backrest pad having a first surface and a second surface opposite to the first surface, the first surface facing the infant or young child; and a seat pad for supporting the buttocks of the infant or young child. Among them, the backrest pad is provided with a pushing portion, and the pushing portion urges the first surface of the backrest pad to push against the back of the infant or young child, so that the back and head of the infant or young child tend to be on the same straight line; and / or, among them, the seat pad is provided with a blocking portion for blocking the infant or young child from sliding down.

[0007] According to an embodiment, the pushing portion is located on the first surface or the second surface of the backrest pad, and the outer surface of the pushing portion forms at least a part of the first surface of the backrest pad or at least a part of the second surface of the backrest pad.

[0008] According to an embodiment, the backrest pad is integrally formed with the pushing portion, and the outer surface of the pushing portion forms at least a part of the second surface of the backrest pad.

[0009] According to one embodiment, the pushing portion is a protrusion protruding in a direction away from the first surface of the back pad.

[0010] According to one embodiment, the pushing portion increases the material thickness of the back pad at the pushing portion, such that the pushing portion has a convex shape; alternatively, the material thickness of the back pad remains unchanged, and a convex shape is formed by bending and bulging at the pushing portion.

[0011] According to one embodiment, the back pad has a first end and a second end in the up-down direction. The first end of the back pad is farther from the seat pad than the second end of the back pad. The thickness of the back pad at the first end is a first thickness, the thickness of the back pad at the second end is a second thickness, and the thickness of the back pad at the pushing portion is a third thickness, and the third thickness is greater than the second thickness.

[0012] According to one embodiment, the third thickness is greater than the first thickness.

[0013] According to one embodiment, the pushing portion is located at a middle position between the first end and the second end of the back pad, and extends at least a part of the left-right width of the back pad in the left-right direction of the back pad.

[0014] According to one embodiment, the back pad is provided with ventilation holes that extend from the first surface of the back pad to the second surface of the back pad.

[0015] According to one embodiment, the seat pad has a first end and a second end opposite thereto. The first end of the seat pad and the second end of the back pad are connected to each other in an arc transition, and the second end of the seat pad extends forward and upward.

[0016] According to one embodiment, the seat pad and the back pad are integrally formed.

[0017] According to one embodiment, the seat pad has a first surface and a second surface opposite to the first surface. The first surface of the seat pad faces the infant. The first surface of the seat pad includes an arc segment connected to the second end of the back pad and a straight segment connected to the arc segment.

[0018] According to one embodiment, the seat pad has a first surface and a second surface opposite to the first surface. The first surface of the seat pad faces the infant. The first surface of the seat pad and the second surface of the seat pad are inclined forward and upward, and the distance between the first surface of the seat pad and the second surface of the seat pad gradually increases in the direction of forward and upward.

[0019] According to an embodiment, a first included angle is formed between a connecting line of a first surface of the seat cushion and a connecting line of a second surface of the seat cushion, and the first included angle is not less than 8° and not more than 25°.

[0020] According to an embodiment, the first included angle is 11°.

[0021] According to an embodiment, the seat cushion has a first surface and a second surface opposite to the first surface, the first surface of the seat cushion faces the infant, and a second included angle is formed between a connecting line of the first surface of the back cushion and a connecting line of the first surface of the seat cushion, and the second included angle is not less than 101° and not more than 110°.

[0022] According to an embodiment, the second included angle is 105°.

[0023] According to an embodiment, the seat cushion further has a third surface, the third surface is located at a second end of the seat cushion, and the third surface connects the first surface and the second surface of the seat cushion.

[0024] According to an embodiment, the second surface of the seat cushion extends forward and upward beyond the first surface, and the third surface and the first surface are connected to each other in an arc transition.

[0025] According to an embodiment, the blocking portion is in the form of a protrusion extending forward and upward, and an outer surface of the blocking portion forms at least a part of the first surface and the third surface of the seat cushion.

[0026] According to an embodiment, a thickness at a second end of the back cushion is a second thickness, and a thickness between an end of the straight surface segment close to the arc surface segment and the second surface of the seat cushion is a fourth thickness, and the fourth thickness is greater than the second thickness.

[0027] According to an embodiment, a thickness between the first surface and the second surface of the seat cushion near the third surface of the seat cushion is a fifth thickness, and the fifth thickness is greater than the fourth thickness.

[0028] According to an embodiment, the seat cushion is provided with an avoidance portion for avoiding a crotch belt assembly provided on a seat portion of the seat body.

[0029] According to an embodiment, the avoidance portion is an avoidance notch recessed backward from the third surface of the seat cushion, and the avoidance notch has an avoidance portion limiting surface, wherein the avoidance portion limiting surface is perpendicular to the second surface of the seat cushion, or the avoidance portion limiting surface extends obliquely forward and downward and from top to bottom relative to the second surface of the seat cushion.

[0030] According to another aspect of the present application, a child safety seat is provided, which includes a seat body and a support structure provided on the seat body. The support structure includes: a headrest portion for supporting the head of an infant; and the seat cushion structure as described above.

[0031] According to an embodiment, the headrest portion has a first end and a second end in the up-down direction. The first end of the headrest portion is farther from the seat cushion structure than the second end of the headrest portion. Wherein, an upper protrusion is provided at the first end of the headrest portion, and / or side protrusions are provided on both the left and right sides of the headrest portion.

[0032] According to an embodiment, the headrest portion has a first surface and a second surface opposite to the first surface. The first surface faces the infant. A transition portion is provided at the second end of the headrest portion. The transition portion is bent downward relative to other parts of the headrest portion toward the second surface of the headrest portion.

[0033] According to an embodiment, the thickness of the headrest portion at the transition portion is a sixth thickness, and the sixth thickness is less than the first thickness of the back cushion at its first end away from the seat portion cushion.

[0034] According to an embodiment, when the bottom of the seat body is placed on a horizontal plane, the second surface of the seat portion cushion forms a third included angle with the horizontal plane, wherein the third included angle is not less than 25° and not more than 55°.

[0035] According to an embodiment, the third included angle is 40°.

[0036] According to yet another aspect of the present application, a child safety seat is provided, which includes: a seat body; a seat cushion structure removably placed on the seat body. The seat cushion structure includes a back cushion and a seat portion cushion. The first surface of the seat portion cushion faces the infant; wherein, when the bottom of the seat body is placed on a horizontal plane, the included angle between the first surface of the seat portion cushion and the horizontal plane is a fourth included angle, and the fourth included angle is not less than 33° and not more than 80°.

[0037] According to an embodiment, the fourth included angle is not less than 36° and not more than 70°.

[0038] According to an embodiment, the fourth included angle is 51°.

[0039] The seat cushion structure according to the present application can effectively prevent the infant sitting on it from sliding down and getting out of the protection of the headrest portion, and can provide effective and safe support for the infant, so that the head and body of the infant are in a straight line, avoiding the danger caused by the infant's head bending toward its body, and can provide reliable and safe support for the infant. Description of the Drawings

[0040] The accompanying drawings are included herein to provide a further understanding of the present invention and are incorporated into and form a part of this specification. The accompanying drawings illustrate embodiments of the present invention and, together with the following description, are used to explain the principles of the present invention.

[0041] In the accompanying drawings:

[0042] Figure 1 is a schematic diagram showing a child safety seat according to the present application;

[0043] Figure 2 is a side view and a partial enlarged view showing a support structure according to the present application;

[0044] Figure 3 is a schematic diagram showing a seat cushion structure according to the present application;

[0045] Figure 4 is a side schematic view showing a seat cushion structure according to the present application;

[0046] Figure 5 is a side sectional view showing a seat cushion structure according to the present application;

[0047] Figure 6 is a partial side schematic view showing a seating part cushion according to the present application; and

[0048] Figure 7 is a partial sectional view showing another embodiment of an avoidance portion according to the present application.

[0049] Figure 8 is a schematic diagram showing a seat cushion structure of a comparative example; and

[0050] Figure 9 is a schematic diagram showing a support structure of a comparative example.

[0051] List of reference numerals:

[0052] Child safety seat: 10

[0053] Seat body 12

[0054] Plastic body 12a, Foamed body 12b

[0055] Handle 14

[0056] Crotch strap assembly 16

[0057] Support structure: 20, 20'

[0058] Headrest part 100, 100'

[0059] First end 110

[0060] Upper convexity 112, side convexity 113

[0061] Second end 120

[0062] Transition part 122

[0063] First surface 130

[0064] Second surface 140

[0065] Seat cushion structure 200, 200’

[0066] Backrest cushion 210

[0067] First surface 211, second surface 212, first end 213

[0068] Second end 214, pushing part 215, ventilation holes 216

[0069] Seat part cushion 220

[0070] First surface 221, second surface 222, third surface 227

[0071] Arc surface segment 221a, straight surface segment 221b

[0072] First end 223, second end 224, blocking part 226

[0073] Avoidance part 225, avoidance part limiting surface 225a

[0074] l: Midline of the infant's body

[0075] β: First included angle

[0076] α: Second included angle

[0077] γ: Third included angle

[0078] δ: Fourth included angle

[0079] l: Straight line

[0080] T1: First thickness

[0081] T2: Second thickness

[0082] T3: Third thickness

[0083] T4: Fourth thickness

[0084] T5: Fifth thickness

[0085] T6: Sixth thickness Detailed implementation manners

[0086] In the following, exemplary embodiments will be described in detail with reference to the accompanying drawings. Although the present disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings. However, the present disclosure should not be construed as limited to the embodiments set forth herein. On the contrary, the present disclosure will cover all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments.

[0087] In the following description, a child safety seat is taken as an example. However, according to the seat cushion structure and support structure of the present application, they can also be applied to other child devices that need to support infants and young children, such as child dining chairs and various types of baby carriages. Refer to Figure 1 As shown, the Figure 1 is a schematic diagram showing a child safety seat 10 according to the present application. The child safety seat 10 can be installed on an automobile seat and includes a seat body 12. The seat body 12 is composed of two parts, namely, a plastic body 12a and a foam body 12b. The plastic body 12a forms the frame of the seat body 12, and the foam body 12b is disposed inside the plastic body 12a to provide a more comfortable seating space for the occupant.

[0088] See Figure 1 , the seat body 12 can be divided into a backrest part and a seat part. The child safety seat 10 is detachably installed on an automobile seat. For convenient carrying, the child safety seat 10 usually further includes a handle 14, and the handle 14 straddles both end sides of the seat body 12 in the width direction. As Figure 1 shown, the child safety seat 10 is in the form of a carrycot, which can be installed on an automobile seat or a baby stroller for use, and can also be lifted and used alone. In addition, the child safety seat 10 further has a crotch belt assembly 16. The crotch belt assembly 16 is connected to the seat part of the seat body 12. The crotch belt assembly 16 includes a crotch belt and a fastening member connected to the crotch belt (the crotch belt assembly is schematically shown in the figure and the fastening member is not shown). The child safety seat 10 further has a shoulder belt and / or a waist belt (not shown), and the connecting members (not shown) on the shoulder belt and the waist belt are also fastened to the fastening member. Thus, the crotch belt and the shoulder belt can form a three-point seat belt, or the crotch belt, the shoulder belt, and the waist belt form a five-point seat belt.

[0089] As Figure 1 and Figure 2 shown, wherein Figure 2FIG. 0 is a side view showing the support structure 20 according to the present application. The child safety seat 10 has a support structure 20, which includes a headrest portion 100 and a seat cushion structure 200. The headrest portion 100 is used to support the head of the infant, and the seat cushion structure 200 is detachably disposed on the seat body 12 of the child safety seat 10 and is used to support the back and buttocks of the infant. For infants with a smaller body size, the seat cushion structure 200 can further support the legs (such as the thighs) of the infant. The seat cushion structure 200 can provide better support for infants with a younger age and a smaller body size. Figure 2 An infant supported by the support structure 20 is also schematically shown, with its head resting against the headrest portion 100 and its back and buttocks resting against the seat cushion structure 200, and the head and the back being substantially on the same straight line l.

[0090] The headrest portion 100 can move longitudinally along the backrest portion of the seat body 12 to adjust the height position of the headrest portion 100. The headrest portion 100 has a first surface 130 and a second surface 140 opposite to the first surface 130. The first surface 130 faces the head of the infant. The headrest portion 100 has a first end 110 and a second end 120. The first end 110 of the headrest portion 100 is farther from the seat cushion structure 200 than the second end 120 of the headrest portion. The second end 120 of the headrest portion 100 is closer to the seat cushion structure 200 than the first end 110 of the headrest portion, and an upper protrusion 112 is provided at the first end 110. In an alternative embodiment, side protrusions 113 are provided on both the left and right sides of the headrest portion 100 (as Figure 1 shown). Both the upper protrusion 112 and the side protrusions 113 protrude outward relative to the first surface 130 of the headrest portion 100, so as to provide all-round protection for the head of the infant. A transition portion 122 is also provided at the second end 120 of the headrest portion 100. The transition portion 122 is bent downward toward the second surface 140 relative to other parts of the headrest portion 100. The downwardly bent portion of the transition portion 122 can be a downward arc segment, a downward inclined surface, or other downward curve segments or broken line segments.

[0091] As Figure 1 and Figure 2 shown, the seat cushion structure 200 has a certain hardness to provide sufficient support for the infant. The seat cushion structure 200 can be, for example, PU foam or EVA foam, etc. The seat cushion structure 200 can be placed inside an outer cloth cover (not shown). For example, the outer cloth cover covers the outside of the seat cushion structure 200 and holds the seat cushion structure inside the outer cloth cover through a zipper, a hook-and-loop fastener, a snap fastener, a magnetic fastener, a loop, etc., so as to facilitate the removal and cleaning of the outer cloth cover. The outer cloth cover is relatively soft and skin-friendly, and the outer cloth cover can be made of materials such as uli cloth or knitted cloth.

[0092] With reference to Figure 3 、 Figure 4 andFigure 5 As shown, Figure 3 is a schematic diagram showing a seat cushion structure 200 according to the present application, Figure 4 is a schematic side view showing a seat cushion structure 200 according to the present application, Figure 5 2 is a side cross-sectional view showing a seat cushion structure 200 according to the present application, the seat cushion structure 200 includes a back cushion 210 and a seat cushion 220, the back cushion 210 supports the back of an infant, and the seat cushion 220 supports the buttocks of the infant, or supports the buttocks and legs (e.g., thighs) of the infant. The back cushion 210 has a first end 213 and a second end 214, and the first end 213 of the back cushion 210 is away from the seat cushion 220 relative to the second end 214 of the back cushion 210.

[0093] The first surface 211 of the back pad 210 is the surface facing the infant, and the second surface 212 of the back pad 210 is the surface facing away from the infant. At least one of the first surface 211 and the second surface 212 of the back pad 210 is provided with a push portion 215, which can prop up the back pad 210 after the seat cushion structure 200 is placed on the child safety seat 10, so that the infant's back can be better lifted up, so that the head and back of the infant can be relatively stretched, and the head of the infant is reduced from bending toward the back to affect the infant's breathing.

[0094] The pushing portion 215 can be arranged in the middle area of ​​the back pad 210 in the length direction, or can be located at other positions between the first end 213 of the back pad 210 and the second end 214 of the back pad 210, and the pushing portion 215 extends at least a portion of the left and right width of the back pad 210 along the left and right direction of the back pad 210.

[0095] In this embodiment, the pushing portion 215 is disposed on a side of the back pad 210 away from the first surface 211, that is, the pushing portion 215 is located at the second surface 212 of the back pad 210, and the outer surface of the pushing portion 215 forms at least a part of the second surface 212 of the back pad 210. Thus, the pushing portion 215 can abut against the backrest portion of the child safety seat or the baby carriage, and at the same time can support the first surface 211 of the back pad 210 to push against the back of the infant. The pushing portion 215 according to this embodiment protrudes in an arc shape, so the second surface 212 of the back pad 210 is integrally arc-shaped, and an approximate middle portion of this arc shape protrudes more towards the backrest portion of the child safety seat or the baby carriage. The back pad 210 may be integrally formed with the pushing portion 215, and the pushing portion 215 protrudes in a direction away from the first surface 211. The pushing portion 215 is of course not limited to the above-mentioned arc shape, and other forms of the pushing portion, such as the form of a bump, are also feasible, as long as it can push up the back of the infant and reduce the angle at which the head bends towards the body. In other embodiments, the pushing portion 215 may not be integrally formed with the back pad 210. For example, the base body of the back pad 210 and the pushing portion 215 are separately formed, and then the pushing portion 215 is combined with the base body by means of adhesion, clamping, bundling, etc., so that the base body and the pushing portion together form the back pad 210.

[0096] It should be noted that in this embodiment, the pushing portions 215 are generally distributed in the middle region of the second surface 212 of the back pad 210, so the outer surface of the pushing portion 215 forms a part of the second surface 212 of the back pad 210. In other embodiments, the outer surface of the pushing portion 215 may form the entire surface of the second surface 212 of the back pad 210; or the pushing portion 215 is located at the first surface 211 of the back pad 210, and the outer surface of the pushing portion 215 forms at least a part of the first surface 211 of the back pad 210, and can support the first surface 211 of the back pad 210 to push against the back of the infant.

[0097] Figure 4 It is shown that the thickness of the back pad 210 at the first end 213 is the first thickness T1, the thickness of the back pad 210 at the second end 214 is the second thickness T2, and the thickness of the back pad 210 at the pushing portion 215 is the third thickness T3. The third thickness T3 is greater than the second thickness T2, and the third thickness T3 is also greater than the first thickness T1.

[0098] It should be noted that the pushing part 215 in this embodiment increases the material thickness of the back pad 210 at the pushing part 215, making the pushing part 215 in a convex shape, so that the first surface 211 of the back pad 210 can push the back of the infant forward and upward. The pushing part 215 of this embodiment can also be called the back thickening part. In other embodiments, the back of the infant can be pushed by the bending shape of the pushing part 215. For example, the material thickness remains unchanged, but a convex shape is formed by bending and bulging at the pushing part 215. In this embodiment, the setting of the pushing part 215 can make the back of the infant more stretched, and then drive the area between the head and the back to be more stretched, reducing the excessive inward bending of the back of the infant and facilitating smooth breathing of the infant. It should be noted that in other embodiments, the pushing part 215 may not be convex, as long as it can push the back of the infant so that the back and the head of the infant tend to be on the same straight line.

[0099] As Figure 3 shown, the back pad 210 is further provided with ventilation holes 216. The ventilation holes 216 can be provided in multiple numbers and extend from the first surface 211 of the back pad 210 to its second surface 212. The ventilation holes 216 shown in the figure are circular. However, in other embodiments, the ventilation holes 216 can also be set in other shapes, such as oval, racetrack-shaped, strip-shaped, square, rectangular, etc.

[0100] As Figure 3 shown, in this embodiment, the back pad 210 and the seat pad 220 are integrally formed. The first end 223 of the seat pad 220 is connected to the second end 214 of the back pad 210 integrally, and the connection part is in a smooth curved shape. With reference to Figure 5 shown, according to the embodiment shown in the figure, the integrally formed back pad 210 and seat pad 220 are arranged at an angle to each other. To obtain the best riding comfort, the connection part between the back pad 210 and the seat pad 220 is in a curved shape. Of course, in other embodiments, the back pad 210 and the seat pad 220 can also be separately formed and then combined together.

[0101] As Figure 3 and Figure 5As shown, the seat cushion 220 has a first end 223 and an opposite second end 224. The first end 223 of the seat cushion 220 and the second end 214 of the back cushion 210 are connected to each other with an arc transition. The second end 223 of the seat cushion 220 extends forward and upward. The seat cushion 220 has a first surface 221 and a second surface 222 opposite to the first surface 221, and the first surface 221 faces the infant. As described above, there is an arc transition between the back cushion 210 and the seat cushion 220 in this embodiment. Therefore, the first surface 221 of the seat cushion 220 includes an arc surface segment 221a connected to the second end 214 of the back cushion 210 and a straight surface segment 221b connected to the arc surface segment 221a, and the straight surface segment 221b extends substantially straight forward and upward.

[0102] The seat cushion 220 further has a third surface 227, and the third surface 227 is located at the second end 224 of the seat cushion 220. The third surface 227 connects the first surface 221 and the second surface 222 of the seat cushion 210. As Figure 3 and Figure 5 shown, the third surface 227 and the first surface 221 are connected to each other with an arc transition.

[0103] The seat cushion 220 further has a blocking portion 226. The blocking portion 226 can block the sliding of the seated infant, so that the seat cushion 220 can support the infant, which is beneficial to maintaining the position of the infant's head and preventing the infant's head from being bent excessively backward when the infant is sleeping or the vehicle is bumping. In this embodiment, the seat cushion 220 is integrally formed as a whole; in other embodiments, the seat cushion 220 may also include multiple separate parts, and the blocking portion 226 is separately formed and connected to each other with other parts to jointly form the seat cushion 220.

[0104] As Figure 3 and Figure 5 shown, in this embodiment, the blocking portion 226 is located at the second end 224 of the seat cushion 220 and is in the form of a convex portion extending obliquely upward. Refer to Figure 3 and Figure 5 , the blocking portion 226 is located on the upper oblique side of the seat cushion 220, and the outer surface of the blocking portion 226 forms at least a part of the first surface 221 and the third surface 227 of the seat cushion 220. Since there is an arc transition between the first surface 221 and the third surface 227, the legs (such as the calves) of older or larger infants can rest against the third surface 227 to obtain comfortable support. The thickness between the first surface 221 and the second surface 222 of the seat cushion 220 gradually increases from the first end 223 of the seat cushion 220 toward the end adjacent to its third surface 227.

[0105] In this embodiment, the first end 223 of the seat portion pad 220 is integrally connected to the second end 214 of the backrest pad 210. Refer to Figure 4 , the thickness of the seat portion pad 220 at its first end 223, that is, the thickness between the end of the arc surface segment 221a of the first surface 221 of the seat portion pad 220 close to the backrest pad 210 and the second surface 222 of the seat portion pad 220 is the second thickness T2 of the backrest pad 210 at its second end 214. The thickness between the end of the straight surface segment 221b of the first surface 221 of the seat portion pad 220 close to the arc surface segment 221a and the second surface 222 of the seat portion pad 220 is the fourth thickness T4, and the fourth thickness T4 is greater than the second thickness T2. The thickness between the first surface 221 and the second surface 222 of the seat portion pad 220 adjacent to its third surface 227 is the fifth thickness T5, and the fifth thickness T5 is greater than the fourth thickness T4. In this embodiment, the maximum thickness in the seat portion pad 220 is the above-mentioned fifth thickness T5.

[0106] See Figure 5 As shown, the thickness between the straight surface segment 221b of the first surface 221 and the second surface 222 also gradually increases from the end close to the backrest pad 210 to the end close to the third surface 227. In this embodiment, the second surface 222 of the seat portion pad 210 extends forward and upward beyond the first surface 221, and the third surface 227 is an inclined surface with a circular arc transition and connects the first surface 221 and the second surface 222.

[0107] Combined with reference to Figure 5 , Figure 6 As shown, the Figure 6FIG. 0 is a partial side view showing the seating cushion 220 according to the present application. To conform to ergonomics and provide a more comfortable seating experience, while achieving the positioning and blocking function of the blocking portion 226, the included angle between the connecting line of the first surface 221 of the seating cushion 220 (i.e., a part of the outer surface of the blocking portion 226 in this embodiment) and the connecting line of the second surface 222 of the seating cushion 220 is the first included angle β, where the first included angle β is not less than 8° and not greater than 25° (i.e., 8° ≤ β ≤ 25°), and preferably β = 11°. The included angle between the connecting line of the first surface 221 of the seating cushion 220 (i.e., a part of the outer surface of the blocking portion 226 in this embodiment) and the connecting line of the first surface 211 of the backrest cushion 210 is the second included angle α, where the second included angle α is not less than 101° and not greater than 110° (i.e., 101° ≤ α ≤ 110°), and preferably α = 105°. When the bottom of the seat body 12 is supported by a horizontal plane, the included angle between the second surface 222 of the seating cushion 220 and the horizontal plane is the third included angle γ, and the third included angle γ is not less than 25° and not greater than 55° (i.e., 25° ≤ γ ≤ 55°), and preferably γ = 40°. The above setting of the blocking portion 226 can also provide better support for the infants thereon, improving the comfort, stability, and safety of the ride.

[0108] As Figure 6 shown, when the bottom of the seat body 12 is supported by a horizontal plane, the included angle between the first surface 221 of the seating cushion 220 and the horizontal plane is the fourth included angle δ, where the fourth included angle δ is not less than 33° and not greater than 80° (i.e., 33° ≤ δ ≤ 80°), and more specifically, the fourth included angle δ is not less than 30° and not greater than 70° (i.e., 30° ≤ δ ≤ 70°), and preferably δ = 51°.

[0109] It should be noted that in this embodiment, both the first surface 221 and the second surface 222 of the seating cushion 220 have an arc transition. The first included angle β can be defined by the extension line (i.e., the connecting line) of the first surface 221 of the seating cushion 220 and the extension line (i.e., the connecting line) of the second surface 222 of the seating cushion 220; the second included angle α can be defined by the extension line (i.e., the connecting line) of the first surface 221 of the seating cushion 220 and the extension line (i.e., the connecting line) of the first surface 211 of the backrest cushion 210; As Figure 6As shown, the bottom of the seat body 12 is arc-shaped. When the bottom of the seat body 12 is supported by a horizontal plane, the horizontal plane is substantially tangent to the bottom of the seat body 12. The third included angle γ can be defined by the extension line of the second surface 222 of the seat cushion 220 and the tangent line of the bottom of the seat body 12. In other embodiments, the back cushion 210 and the seat cushion 220 may not be in an arc transition, but directly connected straight to form a clear angle origin, and the first included angle β can be obtained more directly. Similarly, in other embodiments, the second included angle α, the third included angle γ, and the fourth included angle δ can be directly defined without the extension line according to the specific shape changes of the seat cushion structure 200 and the bottom of the seat body 12.

[0110] It should be noted that in this embodiment, the blocking portion 226 is generally distributed in the front end area of the first surface 221 of the seat cushion 220. Therefore, the outer surface of the blocking portion 226 forms a part of the first surface 221 of the seat cushion 220 (such as the straight surface segment 221b of the first surface 221 of the seat cushion 220) and the third surface 227. In other embodiments, the outer surface of the blocking portion 226 may form the entire surface of the first surface 221 of the seat cushion 220 and / or the third surface 227 of the seat cushion 220.

[0111] As Figure 3 and Figure 5 shown, an avoidance portion 225 is provided on the second end 224 of the seat cushion 220 to avoid the crotch belt assembly 16 provided on the seat portion of the seat body 12. The avoidance portion 225 may be in the form of an avoidance notch, recessed inward from the third surface 227 of the seat cushion 220, as Figure 3 , Figure 5 shown. Of course, the avoidance portion 225 may also be in the form of an avoidance hole. By passing the crotch belt assembly 16 through the avoidance portion 225, the seat cushion structure 200 can be limited and blocked to prevent the seat cushion structure 200 from sliding down. Thus, the cooperation between the avoidance portion 225 and the crotch belt assembly 16 can enable the seat cushion structure 200 to better support the infant and reduce the risk of the infant sliding down.

[0112] As Figure 3 shown in the embodiment, the avoidance portion 225 is an avoidance notch, and the avoidance portion limiting surface 225a is substantially perpendicular to the second surface 222 of the seat cushion 220. And as Figure 7 shown, Figure 7 is a partial cross-sectional view showing another embodiment of the avoidance portion 225 according to the present application. In this embodiment, the avoidance portion limiting surface 225a is inclined downward and inward (i.e., inclined from front to back and from top to bottom). When the crotch belt abuts against the avoidance portion limiting surface 225a, the acting force direction of the crotch belt on the avoidance portion limiting surface 225a can be more inclined towards the headrest portion 100, which is beneficial to holding the seat cushion structure 200 and preventing the seat cushion structure 200 from sliding down.

[0113] The headrest portion 100 and the seat cushion structure 200 as described above can support the entire body of the infant, enabling the back and head of the infant to be relatively stretched (i.e., the back and head tend to be stretched in a straight line, rather than the head being overly bent towards the back), ensuring smooth breathing for the infant. In this embodiment, as Figure 2 shown, the thickness of the back cushion 210 at its first end 213 is the first thickness T1, and the thickness of the headrest portion 100 at the transition portion 122 is the sixth thickness T6, and the first thickness T1 is greater than the sixth thickness T6. Thus, even when the head of the infant is at a lower position on the headrest portion 100, the back of the infant can be supported upward relative to its head. After the back of the infant is supported, it is conducive to driving the head to stretch away from the back, and further conducive to the head of the infant resting on the headrest portion 100 and the back resting on the back cushion 210 being located on substantially the same straight line, with a smooth transition between the head and the back, reducing the risk of infant suffocation. Further, the first thickness T1 is less than the above-mentioned fifth thickness T5 (see Figure 4 as shown).

[0114] It should be noted that the thickness at each position of the above-mentioned seat cushion structure 200 is taken as the thickness direction in the direction of the supporting force provided by the seat cushion structure 200 at that position. Therefore, when the shape of the seat cushion structure 200 is bent, the thickness direction at each position will also change. For example Figure 3 Figure 4 and Figure 5 the thickness directions of the first thickness T1 and the second thickness T2 in

[0115] are not parallel.

[0116] It should also be noted that in this embodiment, the headrest portion 100 and the seat cushion structure 200 are integrally formed, and the headrest portion 100 is connected to the backrest portion of the child safety seat 10 and can be adjusted relative to the backrest portion. The seat cushion structure 200 is separately placed in the seat body 12. In other embodiments, the headrest portion 100 and the seat cushion structure 200 may both be detachable structures independent of the seat body 12. For example, the headrest portion 100 and the seat cushion structure 200 may be accommodated in different spaces of the same outer fabric cover, so that the support structure 20 can be detachably placed in the seat body 12; or the headrest portion 100 and the seat cushion structure 200 are respectively accommodated in different outer fabric covers, and then the headrest portion 100 and the seat cushion structure 200 are connected together through structures such as Velcro, snap buttons or zippers; or the headrest portion 100 and the seat cushion structure 200 may be integrally formed.

[0117] See Figure 8 and Figure 9 , in which Figure 8 is a schematic diagram showing the seat cushion structure 200' of the comparative example; Figure 9 is a schematic diagram showing the support structure 20' of the comparative example. For the seat cushion structure 200' of this comparative example, the seat cushion structure 200' is not provided with a pushing portion and a blocking portion, the surface of the seat cushion structure 200' facing the infant is generally smooth, and the headrest portion 100' is not provided with a transition portion. Therefore, when the infant is sleeping or the child safety seat bumps with the movement of the car, the infant is very likely to slide down, and the head of the infant will also move down at the same time. In this way, as Figure 9 shown, the head of the infant will bend towards the back, which is likely to affect the smoothness of the infant's breathing.

[0118] When the support structure 20 according to the present application is provided on the seat body 12 of the child safety seat 10, the headrest portion 100 can support the head of the infant, the seat cushion structure 200 can support the back and buttocks of the infant, and at the same time, a transition portion 122 is provided on the second end 120 of the headrest portion 100, and a pushing portion 215 is provided on the back cushion 210 of the seat cushion structure 200. Therefore, the support structure 20 as a whole can better support the body of the infant, making its head and body tend to stretch and be roughly in a straight line, avoiding the asphyxiation risk caused by the head bending towards the back; in addition, a blocking portion 226 is provided on the seat cushion 220 of the seat cushion structure 200, which can limit and block the infant to prevent the infant from sliding down, and can also provide a more comfortable and safe supporting force for the infant sitting on it. The avoiding portion 225 provided on the seat cushion 220 of the seat cushion structure 200 can allow the crotch belt assembly 16 of the child safety seat 10 to pass through to position the seat cushion structure 200, which can further prevent the infant from sliding down, thereby providing a safe, comfortable and reliable support for the infant.

[0119] It should be noted that when an infant lies or sits normally, the back of the infant is relatively higher. After the infant slides down, the back of the infant also slides down to a relatively low position, and there is a certain range of movement for the back of the infant. The distribution range of the pushing part in the back pad of the present application can be set to correspond to the movement range of the back of the infant, so that the head and body of the infant always tend to be stretched (that is, when the infant lies or sits normally and slides down, its head and body can both tend to be stretched), and are roughly on a straight line. Of course, in other embodiments, if the normal lying or sitting of the infant can ensure smooth breathing of the infant through other structures, the distribution range of the pushing part in the back pad of the present application can only correspond to the range where the back of the infant is located after sliding down.

[0120] Since the features of the present invention can be embodied in many forms without departing from its characteristics, it should also be understood that the above embodiments are not limited to any details described above, unless otherwise specified, but should be broadly interpreted as being within the scope defined by the appended claims. Therefore, all modifications and variations falling within the scope and boundaries of the claims or equivalent schemes of such scope and boundaries should be covered by the appended claims.

Claims

1. A seat cushion structure is applicable to the seat body of a child safety seat. It is characterized in that the seat cushion structure includes: a backrest pad for supporting the back of an infant or toddler, the backrest pad having a first surface and a second surface opposite to the first surface, the first surface facing the infant or toddler; and a seating pad for supporting the buttocks of the infant or toddler. Wherein, the backrest pad is provided with a pushing portion, and the pushing portion urges the first surface of the backrest pad to push against the back of the infant or toddler, so that the back and head of the infant or toddler tend to be on the same straight line; and / or, Wherein, the seating pad is provided with a blocking portion for blocking the infant or toddler from sliding down.

2. The seat cushion structure according to claim 1, It is characterized in that the pushing portion is located on the first surface or the second surface of the backrest pad, and the outer surface of the pushing portion forms at least a part of the first surface of the backrest pad or at least a part of the second surface of the backrest pad.

3. The seat cushion structure according to claim 1, It is characterized in that the backrest pad is integrally formed with the pushing portion, and the outer surface of the pushing portion forms at least a part of the second surface of the backrest pad.

4. The seat cushion structure according to claim 3, It is characterized in that the pushing portion is a protrusion protruding in a direction away from the first surface of the backrest pad.

5. The seat cushion structure according to claim 4, It is characterized in that the pushing portion increases the material thickness of the backrest pad at the pushing portion, so that the pushing portion has a protruding shape; or, the material thickness of the backrest pad remains unchanged, and a protruding shape is formed by bending and bulging at the pushing portion.

6. The seat cushion structure according to claim 1, It is characterized in that the backrest pad has a first end and a second end in the up-down direction, the first end of the backrest pad is farther from the seating pad than the second end of the backrest pad, the thickness of the backrest pad at the first end is a first thickness, the thickness of the backrest pad at the second end is a second thickness, and the thickness of the backrest pad at the pushing portion is a third thickness, and the third thickness is greater than the second thickness.

7. The seat cushion structure according to claim 6, It is characterized in that the third thickness is greater than the first thickness.

8. The seat cushion structure according to claim 6, It is characterized in that the pushing portion is located at a middle position between the first end and the second end of the backrest pad and extends at least a part of the left-right width of the backrest pad in the left-right direction of the backrest pad.

9. The seat cushion structure according to claim 1, It is characterized in that the backrest pad is provided with ventilation holes, and the ventilation holes extend from the first surface of the backrest pad to the second surface of the backrest pad.

10. The seat cushion structure according to claim 1, It is characterized in that the seating pad has a first end and an opposite second end, the first end of the seating pad and the second end of the backrest pad are connected in an arc-shaped transition, and the second end of the seating pad extends forward and upward.

11. The seat cushion structure according to claim 1, It is characterized in that the seating pad and the backrest pad are integrally formed.

12. The seat cushion structure according to claim 10, characterized in that, the sitting part cushion has a first surface and a second surface opposite to the first surface, the first surface of the sitting part cushion faces the infant, and the first surface of the sitting part cushion includes an arc segment connected to the second end of the back cushion and a straight segment connected to the arc segment.

13. The seat cushion structure according to claim 1, characterized in that, the sitting part cushion has a first surface and a second surface opposite to the first surface, the first surface of the sitting part cushion faces the infant, the first surface of the sitting part cushion and the second surface of the sitting part cushion incline forward and upward, and the distance between the first surface of the sitting part cushion and the second surface of the sitting part cushion gradually increases in the direction of facing forward and upward.

14. The seat cushion structure according to claim 13, characterized in that, a first included angle is formed between the connecting line of the first surfaces of the sitting part cushion and the connecting line of the second surfaces of the sitting part cushion, and the first included angle is not less than 8° and not more than 25°.

15. The seat cushion structure according to claim 14, characterized in that, the first included angle is 11°.

16. The seat cushion structure according to claim 1, characterized in that, the sitting part cushion has a first surface and a second surface opposite to the first surface, the first surface of the sitting part cushion faces the infant, a second included angle is formed between the connecting line of the first surfaces of the back cushion and the connecting line of the first surfaces of the sitting part cushion, and the second included angle is not less than 101° and not more than 110°.

17. The seat cushion structure according to claim 16, characterized in that, the second included angle is 105°.

18. The seat cushion structure according to claim 12, characterized in that, the sitting part cushion further has a third surface, the third surface is located at the second end of the sitting part cushion, and the third surface connects the first surface and the second surface of the sitting part cushion.

19. The seat cushion structure according to claim 18, characterized in that, the second surface of the sitting part cushion extends forward and upward beyond the first surface, and the third surface and the first surface are connected in an arc transition with each other.

20. The seat cushion structure according to claim 18, characterized in that, the blocking part is in the form of a protrusion extending forward and upward, and the outer surface of the blocking part forms at least a part of the first surface and the third surface of the sitting part cushion.

21. The seat cushion structure according to claim 18, characterized in that, the thickness at the second end of the back cushion is a second thickness, and the thickness between the end of the straight segment close to the arc segment and the second surface of the sitting part cushion is a fourth thickness, and the fourth thickness is greater than the second thickness.

22. The seat cushion structure according to claim 21, characterized in that, the thickness between the first surface and the second surface of the sitting part cushion at a position adjacent to the third surface of the sitting part cushion is a fifth thickness, and the fifth thickness is greater than the fourth thickness.

23. The seat cushion structure according to claim 18, characterized in that, The seat cushion portion is provided with an avoidance portion for avoiding the crotch belt assembly disposed on the seat portion of the seat body.

24. The seat cushion structure according to claim 23, wherein, the avoidance portion is an avoidance notch recessed backward from the third surface of the seat cushion portion, and the avoidance notch has an avoidance portion limiting surface. Among them, the avoidance portion limiting surface is perpendicular to the second surface of the seat cushion portion, or the avoidance portion limiting surface extends obliquely downward from front to back and from top to bottom with respect to the second surface of the seat cushion portion.

25. A child safety seat, wherein, comprises a seat body and a support structure disposed on the seat body, and the support structure includes: a headrest portion for supporting the head of an infant; and the seat cushion structure according to any one of claims 1-24.

26. The child safety seat according to claim 25, wherein, the headrest portion has a first end and a second end in the up-down direction, and the first end of the headrest portion is farther from the seat cushion structure than the second end of the headrest portion. Among them, an upper protrusion is provided at the first end of the headrest portion, and / or side protrusions are provided on both the left and right sides of the headrest portion.

27. The child safety seat according to claim 26, wherein, the headrest portion has a first surface and a second surface opposite to the first surface, the first surface faces the infant, and a transition portion is provided at the second end of the headrest portion, and the transition portion is bent downward toward the second surface of the headrest portion with respect to other parts of the headrest portion.

28. The child safety seat according to claim 27, wherein, the thickness of the headrest portion at the transition portion is a sixth thickness, and the sixth thickness is less than the first thickness of the back cushion at its first end away from the seat cushion portion.

29. The child safety seat according to claim 25, wherein, when the bottom of the seat body is placed on a horizontal plane, the second surface of the seat cushion portion forms a third included angle with the horizontal plane, and the third included angle is not less than 25° and not more than 55°.

30. The child safety seat according to claim 29, wherein, the third included angle is 40°.

31. A child safety seat, wherein, comprises: a seat body; a seat cushion structure removably placed on the seat body, the seat cushion structure includes a back cushion and a seat cushion portion, and the first surface of the seat cushion portion faces the infant; wherein, when the bottom of the seat body is placed on a horizontal plane, the included angle between the first surface of the seat cushion portion and the horizontal plane is a fourth included angle, and the fourth included angle is not less than 33° and not more than 80°.

32. The child safety seat according to claim 31, wherein, the fourth included angle is not less than 36° and not more than 70°.

33. The child safety seat according to claim 31 or 32, wherein, the fourth included angle is 51°.

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