Child seat and buffer structure

Abstract

The purpose of the present invention is to provide a child seat and a cushion structure which can accommodate the growth of a child and can absorb impact by using a simple structure. The child seat is provided with: a seat body having a seat part and a backrest part; and a cushion structure (4) that includes a support surface (41) that supports the back and buttocks of the child lying upward from below, and that is detachably attached to a corner portion formed by the seat portion and the backrest portion. The buffer structure (4) is provided with a first buffer body (40A) and a second buffer body (40B). The first buffer body (40A) extends in a direction orthogonal to the support surface, and the second buffer body (40B) extends in the same direction as the first buffer body and has a buffer property different from that of the first buffer body.

Description

[0001] This invention is a divisional application of the patent application with Chinese patent application number 202110347210.8, invention name “Child Seat and Buffer Structure”, and application date March 31, 2021. Technical Field

[0002] The invention relates to a child seat and a buffer structure. Background Art

[0003] Generally speaking, when a child under one year old whose neck is not yet strong enough to support itself is placed in a child seat, the child is placed in a reclining position and is kept facing backward relative to the direction of travel of the vehicle and is fixed to the child seat with a belt. In this position, when the child is impacted from the front due to an accident or emergency braking, the child will move forward due to the reaction force. In order to suppress the movement of the child, the impact is concentrated on the child's shoulders through the shoulder belt.

[0004] In addition, with regard to child seats having a structure that can mitigate impact from the front, for example, there are: Japanese Patent Publication No. 2009-161010 (Patent Document 1), Japanese Patent Publication No. 2003-63291 (Patent Document 2), Japanese Patent Publication No. 2004-217038 (Patent Document 3) and Japanese Patent Publication No. 2008-184133 (Patent Document 4).

[0005] Patent document 1 discloses that an angle change portion deformed in a direction to reduce the backrest angle is used to absorb impact. Patent documents 2 and 3 disclose that when an impact is applied, the back is rotated in the upright direction and the impact is absorbed by an impact absorbing member. Patent document 4 discloses that when an impact is applied, a rod portion connected to a link arm is moved as the link arm rotates.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2009-161010

[0009] Patent Document 2: Japanese Patent Application Publication No. 2003-63291

[0010] Patent Document 3: Japanese Patent Application Publication No. 2004-217038

[0011] Patent document 4: Japanese Patent Application Publication No. 2008-184133. Summary of the invention

[0012] (Technical problem to be solved by the invention)

[0013] The corner modification part of Patent Document 1 is fixed to the child seat, so it cannot cope with the growth of the child. In addition, the child seats of Patent Documents 2 to 4 have a complicated structure because they use multiple members as a shock absorbing structure.

[0014] The present invention is developed to solve the above-mentioned problems, and its purpose is to provide a child seat and a buffer structure that can absorb impacts with a simple structure in response to the growth of the child.

[0015] (Methods for solving technical problems)

[0016] A child seat according to one aspect of the present invention comprises: a seat body having a seat and a backrest; and a buffer structure comprising a support surface for supporting the back and buttocks of a child lying on his back from below, and being installed in a detachable manner at a corner formed by the seat and the backrest; the buffer structure comprises an impact-absorbing buffer, which comprises: a first buffer extending in a direction orthogonal to the support surface, and a second buffer extending in the same direction as the first buffer and having a different buffering property from the first buffer.

[0017] More preferably, the first buffer body and the second buffer body extend linearly in the front-rear direction.

[0018] More preferably, the first buffer body and the second buffer body are different in at least one of hardness and shape.

[0019] More preferably, the first buffer body and the second buffer body are triangular in shape when viewed in longitudinal section.

[0020] More preferably, the shock absorbing structure further includes an outer shell that surrounds a surface of the shock absorbing structure other than the supporting surface.

[0021] A child seat of one aspect of the present invention comprises: a seat body having a seat and a backrest; and a buffer structure which is detachably mounted at a corner formed by the seat and the backrest; the buffer structure can take a first aspect and a second aspect, wherein the first aspect supports the back and buttocks of a child lying on his / her back at an approximately horizontal angle from below during normal use, and the second aspect deforms flatly along the backrest to bear a load which causes the child to move rapidly when the load is applied to the backrest.

[0022] It is more preferred that the cushioning structure includes: a support surface that supports the back and buttocks of a child lying on his back from below at an approximately horizontal angle; in the first embodiment, the thickness from the intersection of the backrest and the seat to the support surface is more than 70 mm.

[0023] More preferably, the load is greater than 10 kg; in the second embodiment, the thickness from the intersection of the backrest and the seat to the support surface is less than 45 mm.

[0024] More preferably, the angle of the support surface is 20° or less relative to the horizontal plane.

[0025] More preferably, the buffer structure includes: an impact-absorbing buffer body having a support surface; and an outer shell surrounding a surface of the impact-absorbing buffer body other than the support surface.

[0026] More preferably, the outer shell has a harder surface than the impact absorbing and buffering body.

[0027] It is more preferred that the seat further comprises: a waist belt for restraining the waist of a child sitting on the seat body; and a crotch belt for restraining the crotch of a child sitting on the seat body; the shell comprises: a pair of waist belt guide grooves on the side of the shell for passing the waist belt; and a crotch belt guide groove on the front surface of the shell for passing the crotch belt.

[0028] A buffer structure of one aspect of the present invention is installed in a corner formed by a seat and a backrest of a child seat in a detachable manner, wherein the buffer structure comprises: a seat abutting surface abutting the seat; a backrest abutting surface abutting the backrest; and a support surface that supports the back and buttocks of a child lying on his back from below by a flat surface; the buffer structure can take a first aspect and a second aspect, wherein the first aspect is to support the back and buttocks of a child lying on his back from below at a nearly horizontal angle during normal use, and the second aspect is to deform flatly along the backrest to bear a load that causes the child to move rapidly when applied to the backrest.

[0029] (Effects of the Invention)

[0030] The child seat and the buffer structure of the present invention can adapt to the growth of the child and absorb the impact with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1(A) to Figure 1(C) 1(A) shows a state in which the cushioning structure is installed and facing rearward, FIG. 1(B) shows a state in which the cushioning structure is removed and facing rearward, and FIG. 1(C) shows a state in which the cushioning structure is facing forward.

[0032] Figure 2 It is a perspective view of the buffer structure of this embodiment.

[0033] Figure 3(A) to Figure 3(C) 3(A) is an exploded perspective view of the buffer structure of the present embodiment, FIG. 3(B) shows the impact absorbing buffer body, and FIG. 3(C) shows the first and second buffer bodies, respectively.

[0034] 4(A) and 4(B) show a state where the buffer structure is installed and facing rearward, wherein FIG. 4(A) shows a state where no impact is applied, and FIG. 4(B) shows a state where an impact is applied.

[0035] FIG. 5(A) is an enlarged view of FIG. 4(A) , and FIG. 5(B) is an enlarged view of FIG. 4(B) .

[0036] Description of reference numerals:

[0037] 1 Child seat

[0038] 2 Base body

[0039] 3 Seat body

[0040] 4 Buffer structure

[0041] 31 Sitting

[0042] 32 Backrest

[0043] 33 Belt

[0044] 34 Shoulder strap

[0045] 35 gear belt

[0046] 36 Buckle

[0047] 40 Impact absorbing buffer

[0048] 40A First buffer

[0049] 40B Second buffer

[0050] 41 Support surface

[0051] 42 Side

[0052] 43 First bottom surface

[0053] 44 Second bottom surface

[0054] 45 Long side

[0055] 46 First short side

[0056] 47 Second short side

[0057] 50 Shell

[0058] 51 Upper surface

[0059] 52 Side

[0060] 53 Bottom

[0061] 54 Seat contact surface

[0062] 55 Backrest contact surface

[0063] 56 recess

[0064] 56a First bottom surface

[0065] 56b Second bottom surface

[0066] 56c Side

[0067] 57 Waist belt guide groove

[0068] 58 gear with guide groove

[0069] A1 Intersection

[0070] A2 Intersection

[0071] T1 Thickness

[0072] T2 Thickness

[0073] θ1 angle

[0074] θ2 angle

[0075] θ3 angle. DETAILED DESCRIPTION

[0076] The embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same reference numerals are given to the same or corresponding parts in the drawings, and their description will not be repeated.

[0077] (About Child Seats)

[0078] 1A to 1C , a child seat 1 of this embodiment will be described. In the description of the child seat 1 , the front-rear direction corresponds to the front-rear direction of the child seat 1 , and the left-right direction corresponds to the left-right direction when the child seat 1 is viewed from the front.

[0079] The child seat 1 of the present embodiment is a device that is arranged on a seat of a vehicle and is used to allow children such as infants or toddlers to ride safely in the vehicle. The child seat 1 includes: a base body 2 and a seat body 3. The base body 2 is placed on the seat of the vehicle. The base body 2 includes: a longitudinal portion that abuts against the backrest of the seat, and a transverse portion that abuts against the seat. The seat body 3 is mounted on the upper side of the base body 2 and is supported in a manner that allows it to rotate freely relative to the base body 2. The seat body 3 is fixed in a manner that is at least facing backward and facing forward.

[0080] The child sits on the seat body 3. Therefore, the seat body 3 has: a seat 31 that supports the child's buttocks, and a backrest 32 that stands from the rear of the seat 31 and supports the child's back. The angles of the seat 31 and the backrest 32 are fixed, and the angle of the backrest 32 relative to the seat 31 is, for example, 80° to 100°. That is, the backrest 32 cannot be tilted forward or backward. In addition, covering components are respectively installed on the seat 31 and the backrest 32 in a detachable manner. These covering components are formed of soft cloth components, such as cushioning materials.

[0081] A waist belt 33 is provided between the seat 31 and the backrest 32 to restrain the waist of the child sitting on the seat body 3. A crotch belt 35 is provided on the seat 31 to restrain the crotch of the child sitting on the seat body 3. A shoulder belt 34 is provided on the backrest 32 to restrain the shoulders of the child sitting on the seat body 3. These belts 33, 34, 35 are connected near the abdomen of the child by buckles 36 provided at the front ends of these belts 33, 34, 35. These belts 33, 34, 35 are so-called five-point belts. Moreover, the waist belt 33 and the shoulder belt 34 may not be formed by independent belts, for example, they may be provided continuously by a single belt.

[0082] When a child under one year old is seated in the child seat 1, as shown in FIG. 1(A), the seat body 3 is directed backward relative to the base body 2, and a buffer structure 4 is installed at a corner formed by the seat portion 31 and the backrest portion 32. The child seat 1 is formed into a bed surface state by installing the buffer structure 4. The bed surface state is a state in which the back and buttocks of the child are at a nearly horizontal angle.

[0083] When a child aged about three months to about twenty-four months is seated in the child seat 1, as shown in FIG. 1(B), the buffer structure 4 disposed at the corner is removed to keep the child seat 1 facing backward. By removing the buffer structure 4, the child seat 1 is turned into a chair state. The chair state is a state in which the child's back and buttocks are held at an angle. The bed state and the chair state will be described later.

[0084] When a child aged about 15 months to about 4 years old is seated in the child seat 1, as shown in FIG1(C), the cushioning structure 4 is unloaded and the seat body 3 is directed forward relative to the base body 2. The seat body 3 is tilted forward relative to the base body 2. Thus, the child seat 1 is in a chair state in which the child's back and buttocks are held at an angle more than in FIG1(B).

[0085] As described above, as shown in Fig. 1(A) , the cushioning structure 4 is used when a child under one year old is seated in the child seat 1. Next, the cushioning structure 4 will be described.

[0086] (About buffer structure)

[0087] Further references Figure 2 5 , the shock absorbing structure 4 is detachably mounted on a corner formed by the seat portion 31 and the backrest portion 32 . The shock absorbing structure 4 includes a shock absorbing shock absorbing body 40 and a housing 50 surrounding the shock absorbing shock absorbing body 40 .

[0088] like Figure 2 As shown in FIG. 3(B) and FIG. 3(C), the shock absorbing and buffering body 40 has softness, resilience, and buffering properties, and absorbs the shock from the supporting surface 41 described later. The shock absorbing and buffering body 40 is, for example, roughly triangular prism-shaped, for example, triangular in longitudinal section. The shock absorbing and buffering body 40 is a foamed body of a synthetic resin having continuous cells, for example, formed of urethane or the like.

[0089] As shown in FIG3(B), the impact absorbing and buffering body 40 is arranged in a manner that the long side 45, which is the longest side among a pair of side surfaces 42 of a roughly triangular shape, faces upward, and the surface (the surface with the widest area among all the surfaces) that is a part of the periphery formed by the long side 45 becomes the support surface 41. The support surface 41 is a roughly rectangular shape when viewed from above. The support surface 41 is inclined downward toward the side end of the child's foot.

[0090] The pair of side surfaces 42 has a long side 45, a first short side 46, and a second short side 47, and the angle between the first short side 46 and the second short side 47 is, for example, 80° to 100°. The first bottom surface 43 and the second bottom surface 44, whose periphery is formed by the first short side 46 or the second short side 47, are arranged toward the housing 50 side.

[0091] As shown in FIG. 1(A), when the child seat 1 is set to face backward and the buffer structure 4 is installed in the corner of the child seat 1, the support surface 41 supports the back and buttocks of the child lying on his back from below at an approximately horizontal angle. That is, the support surface 41 is a part that supports the back and buttocks of the child. In this case, the angle θ1 of the support surface 41 is less than 20° relative to the horizontal plane, preferably less than 15°. If it exceeds 20°, the angle between the child's back and buttocks will be too large, which is not suitable for children under one year old whose necks do not yet have support. In addition, if it is less than 15°, the child's back and feet can be kept in a state without an angle. In this way, the bed surface state is a state in which the child's back and buttocks are supported at an approximately horizontal angle, specifically, the angle θ1 of the support surface 41 is less than 20° relative to the horizontal plane.

[0092] In addition, as shown in FIG. 1(B), when the child seat is set to face backward and the buffer structure 4 is unloaded from the corner of the child seat 1, the covering components of the seat 31 and the backrest 32 of the child seat 1 will abut against the back and buttocks of the child. In this case, the angle θ2 between the seat 31 and the backrest 32 of the child seat 1 is greater than 30° and less than 80° relative to the horizontal plane. If it is less than 30°, it will be too close to the bed surface state. If it exceeds 80°, the angle between the child's back and buttocks will be too large, which is not suitable for children from about three months to about twenty-four months. In this way, the chair state is that the angle θ2 between the seat 31 and the backrest 32 is greater than 30° and less than 80° relative to the horizontal plane.

[0093] As shown in FIG. 3(B) and FIG. 3(C), the impact absorbing buffer body 40 is formed by laminating a plurality of first buffer bodies 40A and a plurality of second buffer bodies 40B. The first buffer body 40A and the second buffer body 40B have different buffer properties. The different buffer properties are different in at least one of hardness and shape. In the present embodiment, the hardness of the first and second buffer bodies 40A and 40B is different, and the hardness of the first buffer body 40A is set to be higher than the hardness of the second buffer body 40B.

[0094] As shown in FIG. 3(C), the first buffer body 40A and the second buffer body 40B are substantially the same shape and are substantially triangular prisms. The first and second buffer bodies 40A and 40B extend in a direction orthogonal to the support surface 41. Specifically, the first and second buffer bodies 40A and 40B extend linearly in the front-back direction (the extension direction of the child's body). That is, the first buffer body 40A and the second buffer body 40B are stacked in the left-right direction.

[0095] The first and second buffer bodies 40A and 40B may be arranged alternately. For example, the first buffer body 40A with a lower hardness may be arranged in the center in the left-right direction, and the second buffer body 40B with a higher hardness may be arranged on the left and right sides. In this way, the first and second buffer bodies 40A and 40B have the same shape and are stacked in the left-right direction, so the first and second buffer bodies 40A and 40B can be easily replaced, and the impact absorbing buffer body 40 as a whole can be set to the most appropriate buffer hardness. In addition, from the perspective of setting the hardness, it is preferred that the first and second buffer bodies 40A and 40B are not fixed by an adhesive or the like.

[0096] As shown in FIG. 3(A), the shell 50 surrounds the surface of the impact absorbing and buffering body 40 other than the support surface 41. The shell 50 is in contact with the seat 31 and the backrest 32. The shell 50 is formed of, for example, a synthetic resin, typically urethane. The hardness of the shell 50 is set higher than that of the impact absorbing and buffering body 40.

[0097] The housing 50 includes an upper surface 51, a pair of side surfaces 52, and a bottom surface 53. As shown in FIGS. 5A to 5B, the bottom surface 53 includes a seat abutting surface 54 abutting against the seat 31, and a backrest abutting surface 55 abutting against the backrest 32. A recess 56 is formed substantially in the center of the upper surface 51. The thickness of the seat abutting surface 54 and the backrest abutting surface 55 is preferably 10 mm or more and 25 mm or less, and the thickness of the intersection where the seat abutting surface 54 and the backrest abutting surface 55 intersect is generally 25 mm.

[0098] As shown in FIG. 3(A), the recess 56 includes: a first bottom surface 56a, a second bottom surface 56b, and a pair of side surfaces 56c. The impact absorbing buffer body 40 is arranged in the recess 56. Therefore, the first bottom surface 56a of the recess 56 abuts against the first bottom surface 43 of the impact absorbing buffer body 40, the second bottom surface 56b abuts against the second bottom surface 44 of the impact absorbing buffer body 40, and the pair of side surfaces 56c abut against a pair of side surfaces 42 respectively. In this way, except for the supporting surface 41 of the impact absorbing buffer body 40, the remaining four surfaces are in close contact with the recess 56. The surfaces 56a, 56b, 56c of the recess and the impact absorbing buffer body 40 may not be fixed by adhesives or the like.

[0099] The housing 50 is further provided with a pair of waist belt guide grooves 57 through which the waist belt 33 passes, and a crotch belt guide groove 58 through which the crotch belt passes on the front surface of the housing 50. The waist belt guide grooves 57 are formed by cutting a pair of side surfaces 52 from the upper surface toward the bottom surface 53. The crotch belt guide grooves 58 are formed by cutting from the upper surface 51 toward the seat contact surface 54.

[0100] The cushioning structure 4 is in the first state (FIG. 4(A) and FIG. 5(A)) during normal use, and can take the second state (FIG. 4(B) and FIG. 5(B)) when a load (impact load) causing a child to move rapidly is applied to the backrest portion 32.

[0101] As shown in Fig. 4 (A), when the buffer structure 4 is in the first state, the buffer structure 4 supports the back and buttocks of a child under one year old lying on his back from below at an approximately horizontal angle. That is, during normal use, the impact absorbing buffer 40 and the shell 50 are almost not squeezed, and the angle θ1 of the support surface 41 is maintained at a bed surface state of less than 20° relative to the horizontal plane.

[0102] As shown in Fig. 5(A), the thickness T1 of the buffer structure 4 is, for example, 70 mm or more, and preferably 90 mm or more. Here, the thickness T1 refers to the distance from the intersection A1 to the intersection A2, and the intersection A1 is the intersection where the seat abutment surface 54 and the backrest abutment surface 55 intersect, and the intersection A2 is the intersection of the line extending from the intersection A1 in the vertical direction and the support surface 41. The thickness T2 shown below is also the same. When the thickness T1 is 70 mm or more, the corners can be filled, and the back and buttocks of the child can be supported at an approximately horizontal angle. In addition, when the thickness T1 is 90 mm or more, even if the child's body becomes larger, the child will not feel constrained, and the back and buttocks of the child can be supported at an approximately horizontal angle. In addition, the thickness of the shell 50 connecting the intersections A1 and A2 is typically 25 mm.

[0103] As shown in FIG. 4(B) and FIG. 5(B), when the buffer structure 4 is in the second state, the buffer structure 4 is squeezed by the load and deformed flatly along the backrest portion 32. Specifically, when a load of more than 10 kg that causes a child to move rapidly is applied to the backrest portion 32, the buffer structure 4 will be in a chair state in which the angle θ3 of the support surface 41 is greater than 35° and less than 45° relative to the horizontal plane. In this way, it is set so that when a load of more than 10 kg is applied to a child, the cushioning property will change from a bed state to a chair state. In addition, the above-mentioned load that causes a child to move rapidly is, for example, an impact from the front such as a vehicle collision or emergency braking. In addition, the so-called flat means that at least the buffer structure 4 is in a shape that is elongated up and down along the backrest portion 32, and also includes a situation in which the portion along the seat portion 31 is elongated front and back.

[0104] When a load of 10 kg or more is applied, as shown in FIG5(B), the thickness T2 from the intersection A1 where the seat contact surface 54 and the backrest contact surface 55 intersect to the intersection A2 of the support surface 41 is, for example, 45 mm or less, and preferably 20 mm or less. If it is 45 mm or less or 20 mm or less, the back and buttocks of the child will be considerably concave toward the backrest 32, so the back and buttocks of the child can absorb the impact.

[0105] (About the operation of the buffer structure)

[0106] 4(A) to (B) and 5(A) to (B), the operation of the cushioning structure 4 when a child is seated in the child seat 1 will be described. FIG4(A) and FIG5(A) show before impact, and FIG4(B) and FIG5(B) show after impact.

[0107] When a child under one year old is seated in the child seat 1, as shown in FIG4(A), a buffer structure 4 is installed at a corner of the child seat 1. By installing the buffer structure 4, the child seat 1 becomes a bed surface. Specifically, the angle θ1 of the support surface 41 becomes, for example, 15° relative to the horizontal plane. The child is seated on the support surface 41 of the buffer structure 4, and the waist belt 33, the shoulder belt 34, and the crotch belt 35 are connected by the buckle 36. Accordingly, the child can lie on the support surface 41 of the child seat 1 with his back facing up.

[0108] In this state, if a large impact is generated from the front of the vehicle to the child sitting in the child seat 1 due to emergency braking and / or an accident, as shown in FIG4(B), the buffer structure 4 will be squeezed and displaced into a chair state. Specifically, when a load of more than 10 k is applied to the child, the thickness of the buffer structure 4 will be, for example, less than 45 mm, and the angle θ3 of the support surface 41 relative to the horizontal plane will be, for example, more than 35° and less than 45°. Specifically, as shown in FIG5(B), first, a load of more than 10 kg is applied to the back and buttocks of the child from the front, and then the impact absorbing buffer body 40 is squeezed toward the backrest 32 and the seat 31 side, and the seat abutment surface 54 and the backrest abutment surface 55 of the shell 50 are squeezed toward the backrest 32 and the seat 31 side. In this way, when a load is applied to the child, the buffer structure 4 will be squeezed in stages, so that the impact can be absorbed by the buttocks or back of the child.

[0109] In the past, when a child under one year old is placed in a child seat, the backrest of the child seat is tilted backward (the angle between the seat and the backrest is widened) to form a bed surface, and the child is provided with a shoulder strap. In such a child seat, when subjected to a front impact caused by a vehicle accident and / or emergency braking, the child will move forward due to the reaction force, so generally, the shoulder strap is used to absorb the impact in order to suppress the movement of the child. In this case, if the shoulder strap is not securely connected, the child will be thrown when an impact is applied, which will cause safety problems, and even if the shoulder strap is securely connected, the impact will be concentrated on the child's shoulders, so the child is heavily burdened.

[0110] In contrast, the child seat 1 of this embodiment is in a bed state when no impact is applied (FIG. 4(A)), and when an impact is applied, the buffer structure 4 is compressed and deformed and shifted to a chair state (FIG. 4(B)). Accordingly, the impact on the child is borne by the entire back, the impact is dispersed to the child's back and buttocks, the impact is mitigated, and the buffer structure 4 can absorb the impact.

[0111] In addition, the buffer structure 4 can be detachably installed at the corner of the child seat 1, so when a child under one year old is seated, the child seat 1 can be set to a bed state by installing the buffer structure 4, and when a child of about three months to about twenty-four months old is seated, the buffer structure 4 can be removed from the child seat 1 and set to a chair state. Therefore, even if the angle between the seat 31 and the backrest 32 is set to a fixed child seat, the shape and angle of the seat surface can be changed by installing or not installing the buffer structure 4, so a simple structure can be used to adapt to the growth of the child.

[0112] Furthermore, since the impact absorbing buffer body 40 uses a plurality of types of buffer materials for the first and second buffer bodies 40A and 40B, the desired hardness can be easily set by changing the shapes and hardnesses of the buffer materials in combination.

[0113] In addition, although the shock absorbing structure 4 of this embodiment includes the shock absorbing shock absorbing body 40 and the shell 50, it is sufficient to include at least the shock absorbing shock absorbing body 40. In this case, the shock absorbing shock absorbing body 40 abuts against the seat 31 and the backrest 32, so the first bottom surface 43 becomes the backrest abutting surface, and the second bottom surface 44 becomes the seat abutting surface.

[0114] In addition, in the present embodiment, the first and second buffer bodies 40A and 40B have the same shape but different hardness, but they may have the same hardness but different shape. For example, the first and second buffer bodies 40A and 40B may have different thicknesses, or a concave portion or a convex portion may be provided on the bottom surface of the first and second buffer bodies 40A and 40B. In addition, the first and second buffer bodies 40A and 40B may have different shapes and hardnesses.

[0115] In addition, the first and second buffer bodies 40A and 40B of the present embodiment are linearly arranged relative to the front-rear direction and stacked in the left-right direction, but they may also be stacked in the up-down direction, diagonal direction, etc. In addition, the first and second buffer bodies 40A and 40B may also be: for example, the first buffer body is dispersedly provided with through holes extending in a direction perpendicular to the support surface, and the second buffer body is inserted into the through holes.

[0116] Furthermore, in the present embodiment, two types of buffer materials, namely the first and second buffer bodies 40A and 40B, are provided, but a plurality of types of buffer materials may be provided.

[0117] In addition, in the above embodiment, the child seat 1 having the buffer structure 4 is described, but the buffer structure 4 may be provided as a single body. In this case, the buffer structure 4 of this embodiment may be additionally installed on the existing child seat. In this case, not only the child seat, but also the buffer structure 4 may be installed in a detachable manner on childcare equipment for children such as a baby carriage, a baby cradle, and a childcare chair.

[0118] Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the embodiments of the drawings. Various modifications and variations can be made to the embodiments of the drawings within the same scope or equivalent scope of the present invention.

Claims

1. A child seat, comprising: A chair body having a seat portion and a backrest portion; and A buffer structure is detachably mounted on a corner formed by the seat and the backrest; The buffer structure can take a first aspect and a second aspect. The first state is the bed surface state, which is to support the back and buttocks of a child lying on his back from below at an approximately horizontal angle during normal use. The second state is a chair state, in which when a load that causes a child to move rapidly is applied to the backrest, the backrest is deformed flatly along the backrest to bear the load; The cushioning structure comprises a support surface, which supports the back and buttocks of a child lying on his back from below at an approximately horizontal angle; The load is more than 10 kg; In the first aspect, the angle of the support surface relative to the horizontal plane is less than 20°; In the second aspect, the angle of the support surface relative to the horizontal plane is less than 35°.

2. The child seat according to claim 1, wherein: In the first aspect, the thickness from the intersection of the backrest portion and the seat portion to the support surface is greater than 70 mm.

3. The child seat according to claim 2, wherein: In the second aspect, the thickness from the intersection of the backrest and the seat to the support surface is less than 45 mm.

4. The child seat according to claim 2, wherein: The buffer structure includes: an impact absorbing buffer body having the support surface; and an outer shell surrounding a surface of the impact absorbing buffer body other than the support surface.

5. The child seat according to claim 4, wherein: The outer shell has a harder hardness than the impact absorbing buffer body.

6. The child seat according to claim 4, further comprising: a waist belt for restraining the waist of a child seated on the seat body; and A crotch belt, for restraining the crotch of a child sitting on the seat body; The shell has: a pair of waist belt guide grooves on the side of the shell for the waist belt to pass through; and a belt guide groove on the front surface of the shell for the belt to pass through.

7. A buffer structure is detachably mounted on a corner formed by a seat and a backrest of a child seat; wherein: The cushioning structure comprises: a seat abutting surface abutting against the seat; a backrest abutting surface abutting against the backrest; and a support surface for supporting the back and buttocks of a child lying on his back from below by a flat surface; The buffer structure can take a first aspect and a second aspect. The first state is the bed surface state, which is to support the back and buttocks of a child lying on his back from below at an approximately horizontal angle during normal use; as well as The second state is a chair state, and when a load that causes a child to move rapidly is applied to the backrest, the backrest is deformed flatly along the backrest to bear the load. The cushioning structure comprises a support surface, which supports the back and buttocks of a child lying on his back from below at an approximately horizontal angle; The load is more than 10 kg; In the first aspect, the angle of the support surface relative to the horizontal plane is less than 20°; In the second aspect, the angle of the support surface relative to the horizontal plane is less than 35°.

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