Safety belt assembly and child carrier

Abstract

The invention relates to a safety belt assembly applied to a child carrier, the child carrier further comprises a carrier body, and the child carrier is characterized by comprising a shoulder strap set with a first end and a second end; the crotch belt group is provided with a third end and a fourth end, the third end is connected with the carrier body, and the fourth end is detachably connected with the first end; the adjusting belt is provided with a fifth end and a sixth end, the fifth end is connected with the carrier body, the sixth end is connected with the second end, and the adjusting belt can be switched between a tensioning state and a loosening state; the self-locking mechanism is arranged between the fifth end and the sixth end; wherein the adjusting belt penetrates through the self-locking mechanism to form linkage with the self-locking mechanism, when the fourth end is connected with the first end and the adjusting belt is in a tensioned state, the shoulder belt group is in a tensioned state in place, and the self-locking mechanism locks the adjusting belt to limit movement of the adjusting belt and the shoulder belt group. The invention further relates to a child carrier. The child carrier comprises a carrier body and the safety belt assembly.

Description

Technical Field

[0001] The present disclosure relates to a safety belt assembly and a child carrier with the safety belt assembly. Background Art

[0002] A child safety seat is a seat designed for children of different weights (or ages) and installed in a car to effectively improve the safety of children riding in a car. A child safety seat is a seat fixed to the car seat and is a car accessory with a restraining and protective function. It is mainly used for children to ride and can restrain children to ensure their safety in the event of an accidental collision.

[0003] At present, child carriers, such as child safety seats, are generally provided with a seat belt assembly. After a child sits in the child carrier, the child can be restrained in the child carrier by the seat belt assembly to ensure travel safety. However, the existing seat belt assembly often cannot be locked after being tightened to the right position, so that the seat belt assembly may continue to be tightened, resulting in the child being too tight, affecting the child's riding comfort, and in the event of a collision, the over-tightened seat belt assembly may also cause secondary injuries to the child. Summary of the invention

[0004] According to a first aspect of the present disclosure, a seat belt length adjustment device for a child safety seat is proposed, comprising: an adjustment belt, having a connecting section located inside the child safety seat and an adjustment section extending from the outside of the child safety seat, the connecting section being connected to the seat belt; a locking piece, which is arranged on the child safety seat and sleeved on the adjustment section of the adjustment belt to operably lock the adjustment belt; and a vertical roller, which is located on the side of the adjustment section of the adjustment belt in the width direction, wherein the vertical roller is closer to the end of the adjustment section than the locking piece.

[0005] According to an embodiment of the present disclosure, the vertical roller includes a first vertical roller and a second vertical roller, the first vertical roller and the second vertical roller are respectively located on both sides of the width direction of the adjustment belt, and the distance between the first vertical roller and the second vertical roller is greater than the width of the adjustment belt.

[0006] According to the present disclosure, a child safety seat is also proposed, comprising: a seat portion, which has an opening portion, the opening portion comprising a bottom wall and a side wall perpendicular to the bottom wall; a safety belt; and a safety belt length adjustment device, which is arranged at the opening portion, wherein the safety belt length adjustment device comprises: an adjustment belt, which has a connecting section located inside the seat portion and an adjustment section outside the seat portion, the connecting section connects the safety belt, the adjustment section passes through the seat portion from the opening portion, and the edge of the adjustment section is opposite to the side wall of the opening portion; and a vertical roller, which is located between the side wall and the adjustment belt.

[0007] According to an embodiment of the present disclosure, the vertical roller includes a first vertical roller and a second vertical roller, the first vertical roller and the second vertical roller are respectively located on both sides of the width direction of the adjustment belt, and the distance between the first vertical roller and the second vertical roller is greater than the width of the adjustment belt.

[0008] According to one embodiment of the present disclosure, the seat belt length adjustment device also includes a locking member, which is arranged at the opening portion and is sleeved on the adjustment section of the adjustment belt, so as to operably lock the adjustment belt; wherein the vertical roller is closer to the end of the adjustment section than the locking member.

[0009] According to one embodiment of the present disclosure, the locking member includes: a fixed seat, which is fixed at the opening portion of the seat; and a locking block, which is pivotally connected to the fixed seat, and the locking block has a release portion for unlocking; wherein, when the locking member locks the adjustment belt, the adjustment belt is clamped between the fixed seat and the locking block.

[0010] According to one embodiment of the present disclosure, the seat belt length adjustment device also includes a cover body; the cover body is fixed at the opening portion to cover the vertical roller; the cover body and the opening portion are configured to form an adjustment belt hole and a release hole; the adjustment belt hole and the release hole are arranged at intervals, the adjustment section is passed through the adjustment belt hole, and the release portion is exposed outside the cover body through the release hole.

[0011] According to one embodiment of the present disclosure, the cover body includes an outlet portion and a covering portion connected to the outlet portion, wherein the height of the outlet portion is lower than the height of the covering portion; the outlet portion covers the vertical roller, and the covering portion partially covers the locking block; the covering portion forms an avoidance space for the pivoting movement of the locking block.

[0012] According to an embodiment of the present disclosure, the vertical roller is pivotally connected to at least one of the seat and the cover through vertical rivets.

[0013] According to one embodiment of the present disclosure, the seat belt length adjustment device also includes a transverse roller, wherein the transverse roller extends along the width direction of the adjustment section, and the transverse roller and the bottom wall are respectively located on both sides of the thickness direction of the adjustment belt; the transverse roller is located between the vertical roller and the locking piece, and the projection of the transverse roller on the side wall partially overlaps with the projection of the vertical roller on the side wall; the length of the transverse roller is smaller than the distance between the rotation axis of the first vertical roller and the rotation axis of the second vertical roller.

[0014] According to a second aspect of the present disclosure, a child safety seat is proposed, comprising: a seat body; a seat belt buffer mechanism, which is arranged inside the seat body; and a seat belt assembly, which includes a fixed end fixed to the seat body and a free end, and the free end is passed through the seat belt buffer mechanism, wherein the seat belt buffer mechanism includes: a fixing frame, which is fixedly connected to the seat body; a buffer member, which can be movably arranged at the fixing frame and has a first position and a second position, and the seat belt assembly is configured to partially surround the buffer member; an elastic member, which is arranged between the fixing frame and the buffer member, or between the seat body and the buffer member, and biases the buffer member in the direction of the first position; and a guide member, which is arranged at the fixing frame and is used to guide the direction in which the seat belt assembly passes through the seat belt buffer mechanism.

[0015] According to an embodiment, when the buffer is located at the first position, the contact length between the seat belt assembly and the buffer is greater than the contact length between the seat belt assembly and the buffer when the buffer is located at the second position.

[0016] According to one embodiment, the seat body includes a backrest and a seat, the seat belt buffer mechanism is arranged on the seat, the seat body also includes a seat belt length adjustment structure, the seat belt length adjustment structure is arranged on the seat, and the free end of the seat belt assembly can be operably locked to the seat belt length adjustment structure.

[0017] According to one embodiment, the seat belt assembly includes two shoulder straps and one adjustment belt, the adjustment belt is passed through the seat belt buffer mechanism, one end of each shoulder strap is fixed to the seat body, and the other end is connected to the adjustment belt inside the seat body.

[0018] According to one embodiment, the fixing frame is provided with a buffer groove, and the buffer member is slidably embedded in the buffer groove; the seat belt buffer mechanism also includes a limit pin, which slides in the buffer groove and supports and drives the buffer member to move.

[0019] According to one embodiment, the buffer groove is perpendicular to the adjustment belt, and is used to buffer the force of the adjustment belt from a vertical direction.

[0020] According to one embodiment, the guide member is configured as two guide rods located on both sides of the buffer member along the direction of the adjustment belt, and the guide rods are rotatably supported in a fixed frame for guiding the adjustment belt. The guide rods are configured so that the direction in which the adjustment belt passes into the seat belt buffer mechanism and the direction in which the adjustment belt passes out of the seat belt buffer mechanism are parallel to each other.

[0021] According to an embodiment, the elastic member is a compression spring or a tension spring.

[0022] According to an embodiment, the buffering member is configured in an arc shape on a side facing the adjustment belt, has a width corresponding to the width of the adjustment belt, and abuts against the elastic member on the other side facing away from the adjustment belt.

[0023] According to one embodiment, the fixing frame has an upper wall and two side walls perpendicular to the upper wall, the side walls are arranged in an inverted trident shape, the middle part of the trident shape is arranged as a buffer member support, the buffer member support has a buffer groove for pivotally supporting the buffer member, and the two sides of the trident shape are respectively arranged as guide rod supports for pivotally supporting the guide rod.

[0024] According to one embodiment, the buffer groove is parallel to the adjustment belt, and is used to buffer the force of the adjustment belt in the horizontal direction.

[0025] According to an embodiment, the guide member is configured as a guide rod, which is rotatably supported in the fixing frame for changing the movement direction of the adjustment belt.

[0026] According to one embodiment, the seat belt buffer mechanism comprises a fixing pin, wherein:

[0027] The buffer member is configured as a buffer rod and the elastic member is a tension spring, and two ends of the tension spring are respectively fixed on the fixing pin and the buffer rod.

[0028] According to one embodiment, the fixed frame has an upper wall and two side walls perpendicular to the upper wall, and a fixing pin support is provided on one side of the side wall for pivotally supporting the fixing pin. The fixing pin support forms a notch in the side wall, and the edges of the notch are respectively abutted against the bottom wall and the rear wall of the opening of the seat body, and a buffer groove and a through hole for inserting the fixing guide rod are provided on the other side of the side wall, the buffer groove is at the same height as the fixing pin, and the through hole is at the height of the bottom wall.

[0029] According to one embodiment, the pin head of the fixing pin and the rod head of the buffer rod extend from the side walls of the fixing frame from both sides, and are used to fix a tension spring on two outer sides of the fixing frame respectively.

[0030] According to an embodiment, the backrest portion is provided with a reinforcing rod, and each of the shoulder straps is configured to be connected to the adjustment belt after passing through the reinforcing rod from an upper position of the backrest portion.

[0031] According to one embodiment, the guide member is arranged to be located between a first position and a second position in the extension direction of the seat belt assembly, and when the buffer member is located at the first position, the contact length between the seat belt assembly and the buffer member is greater than twice the contact length between the seat belt assembly and the buffer member when the buffer member is located at the second position.

[0032] Based on this, it is necessary to provide a seat belt assembly and a child carrier according to the third aspect of the present disclosure, wherein the seat belt assembly can be automatically locked after being tightened into place, thereby preventing the seat belt assembly from being over-tightened.

[0033] In one aspect, the present disclosure provides a safety belt assembly for a child carrier, wherein the child carrier further includes a carrier body, including:

[0034] a shoulder strap assembly having a first end and a second end;

[0035] A crotch strap assembly, having a third end and a fourth end, wherein the third end is connected to the carrier body, and the fourth end is detachably connected to the first end;

[0036] an adjustment belt having a fifth end and a sixth end, wherein the fifth end is connected to the carrier body, the sixth end is connected to the second end, and the adjustment belt is switchable between a tightened state and a loosened state; and

[0037] A self-locking mechanism, disposed between the fifth end and the sixth end;

[0038] Among them, the adjustment belt passes through the self-locking mechanism to form a linkage with the self-locking mechanism, when the fourth end is connected to the first end and the adjustment belt is in a tensioned state, the shoulder strap group is in a tensioned state, and the self-locking mechanism locks the adjustment belt to limit the movement of the adjustment belt and the shoulder strap group.

[0039] In the above-mentioned safety belt assembly, the third end of the crotch belt assembly is connected to the vehicle body, the fourth end is connected to the first end of the shoulder belt assembly, the second end of the shoulder belt assembly is connected to the sixth end of the adjustment belt, and the fifth end of the shoulder belt assembly is connected to the vehicle body, so as to form a restraining structure that can restrain the child to the vehicle body. A self-locking mechanism is arranged between the third end and the fourth end of the adjustment belt, and the adjustment belt passes through the self-locking mechanism and forms a linkage with the self-locking mechanism. When the first end of the shoulder belt assembly is connected to the fourth end of the crotch belt assembly and the adjustment belt is in a tightened state, the shoulder belt assembly is also in a tightened state, and the self-locking mechanism can lock the adjustment belt to limit the movement of the adjustment belt and the shoulder belt assembly, so that the shoulder belt assembly cannot be further tightened, thereby preventing the safety belt assembly from being over-tightened and affecting the riding comfort of the child or causing other safety hazards.

[0040] In one embodiment, the self-locking mechanism includes: a pulling gap, the adjustment belt is at least partially disposed in the pulling gap, and when the fourth end is connected to the first end and the adjustment belt is in a tensioned state, the pulling gap becomes smaller to limit the movement of the adjustment belt.

[0041] In one embodiment, the self-locking mechanism comprises:

[0042] A limiting portion, fixed to the carrier body; and

[0043] a locking member movable between a first position close to the limiting portion and a second position away from the limiting portion;

[0044] Wherein, a pulling gap is formed between the locking member and the limiting portion, and the adjusting belt is at least partially arranged in the pulling gap.

[0045] In one embodiment, the crotch strap assembly is switchable between a tightened state and a relaxed state; when the crotch strap assembly is switched from a relaxed state to a tightened state, the locking member can be linked to move from the second position to the first position.

[0046] In one embodiment, the crotch strap assembly is switchable between a tightened state and a loosened state; the self-locking mechanism further comprises:

[0047] A driving member, which can move relative to the limiting portion and is drivingly connected to the crotch belt assembly, and the locking member is mounted on the driving member;

[0048] Wherein, when the crotch belt assembly switches from a relaxed state to a tightened state, the driving member can be linked to move, so that the driving member drives the locking member to move to the first position.

[0049] In one embodiment, the seat belt assembly further comprises:

[0050] A rotating seat, rotatably disposed on the carrier body and connected to the third end, wherein the rotating seat is rotatable between a first rotating position and a second rotating position;

[0051] Wherein, when the crotch belt assembly is in a tightened state, the rotating seat is in the first rotating position to drive the locking member to move to the first position.

[0052] In one embodiment, the self-locking mechanism further comprises:

[0053] The first restoring member biases the driving member to drive the locking member to move toward the second position.

[0054] In one embodiment, the self-locking mechanism further comprises:

[0055] A pusher, movable between a third position and a fourth position, wherein the pusher has a winding end, and the adjustment belt is at least partially wound around the winding end;

[0056] Wherein, the moving directions of the locking member and the pushing member are staggered. When the adjustment belt switches from the relaxed state to the tightened state, the adjustment belt pushes the winding end, so that the pushing member moves from the fourth position to the third position, and drives the locking member to move to the first position.

[0057] In one embodiment, the self-locking mechanism further comprises:

[0058] A driving member, movable relative to the limiting portion, wherein the locking member is mounted on the driving member; and

[0059] A pushing member, movable between a third position and a fourth position relative to the carrier body, the pushing member having a pushing portion, the pushing portion abutting against the driving member;

[0060] Wherein, the pushing member moves from the fourth position to the third position, and the pushing portion pushes the driving member to drive the locking member to move to the first position.

[0061] In one embodiment, the self-locking mechanism further comprises:

[0062] The first restoring member biases the driving member to drive the locking member to move toward the second position.

[0063] In one embodiment, the self-locking mechanism further comprises:

[0064] The second reset member biases the pushing member to move toward the fourth position.

[0065] In one embodiment, the seat belt assembly further comprises:

[0066] A mounting seat, fixed to the carrier body and having a first mounting groove;

[0067] Wherein, the locking member is arranged in the first installation groove, and the sixth end bypasses the locking member and passes through the first installation groove through the pulling gap, passes through the outer wall of the mounting seat, and then bypasses the winding end to connect with the second end.

[0068] In one embodiment, the self-locking mechanism also includes a first guide rod and a second guide rod fixed to the carrier body, and the first guide rod and the second guide rod are respectively located on both sides of the pushing member. After the sixth end bypasses the outer wall of the mounting seat, it bypasses the winding end through the first guide rod, and then bypasses the second guide rod to connect with the second end.

[0069] In one embodiment, the self-locking mechanism further comprises:

[0070] Limit pins; and

[0071] A mounting seat, fixed to the carrier body and having a first mounting groove, the mounting seat also having a through hole capable of communicating with the first mounting groove;

[0072] Wherein, the pushing member is at least partially located in the first mounting groove, and the pushing member is provided with a through groove, the through groove extends along the direction from the third position to the fourth position, and the limit pin passes through the through hole and the through groove to limit the moving stroke of the pushing member.

[0073] Another aspect of the present disclosure further provides a child carrier, comprising a carrier body and a safety belt assembly as described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 A perspective view and a partial enlarged view of a child safety seat according to the first aspect of the present disclosure are shown;

[0075] Figure 2 A perspective view and a partially enlarged view of a child safety seat according to an embodiment of the first aspect of the present disclosure are shown;

[0076] Figure 3 A perspective view showing a cover according to an embodiment of the first aspect of the present disclosure;

[0077] Figure 4 A perspective view and a partially enlarged view of a child safety seat according to an embodiment of the first aspect of the present disclosure are shown;

[0078] Figure 5 A side cross-sectional view showing a seat belt length adjustment structure according to an embodiment of the first aspect of the present disclosure;

[0079] Figure 6 A perspective view and a partially enlarged view showing the length of the safety belt of a child safety seat according to another embodiment of the first aspect of the present disclosure; and

[0080] Figure 7 A side sectional view showing a seat belt length adjustment structure according to another embodiment of the present disclosure.

[0081] Figure 8 A perspective view showing a child safety seat according to an embodiment of the second aspect of the present disclosure;

[0082] Fig.9A A sectional perspective view and a partially enlarged view of a child safety seat according to an embodiment of the second aspect of the present disclosure are shown;

[0083] Fig. 9B A sectional perspective view and a partially enlarged view of a child safety seat according to an embodiment of the second aspect of the present disclosure are shown;

[0084] Fig.10 A sectional side view and a partially enlarged view of a child safety seat according to an embodiment of the second aspect of the present disclosure are shown;

[0085] Fig.11 A cross-sectional view and a partially enlarged view of a child safety seat according to an embodiment of the second aspect of the present disclosure are shown;

[0086] Fig.12 A cross-sectional view and a partially enlarged view of a child safety seat according to an embodiment of the second aspect of the present disclosure are shown;

[0087] Fig.13 A seat belt buffer mechanism according to an embodiment of the second aspect of the present disclosure is shown;

[0088] Fig.14 A seat belt buffer mechanism according to an embodiment of the second aspect of the present disclosure is shown;

[0089] Fig.15 An exploded view and a partially enlarged view of a child safety seat according to an embodiment of the second aspect of the present disclosure are shown;

[0090] Fig.16 A bottom perspective view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of the present disclosure are shown;

[0091] Fig.17 A bottom perspective view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of the present disclosure are shown;

[0092] Fig.18 A cross-sectional view and a partially enlarged view showing a child safety seat according to another embodiment of the second aspect of the present disclosure;

[0093] Fig.19 A bottom perspective view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of the present disclosure are shown;

[0094] Fig. 20 A cross-sectional view and a partially enlarged view showing a child safety seat according to another embodiment of the second aspect of the present disclosure;

[0095] Fig.21 A seat belt buffer mechanism according to another embodiment of the second aspect of the present disclosure is shown;

[0096] Fig. 22 A seat belt buffer mechanism according to another embodiment of the second aspect of the present disclosure is shown; and

[0097] Fig.23 A bottom perspective view and a partially enlarged view of a child safety seat according to another embodiment of the second aspect of the present disclosure are shown.

[0098] Fig.24 A schematic structural diagram of a child carrier according to a first embodiment of the third aspect of the present application;

[0099] Fig.25 for Fig.24 3A-3A cross-sectional view and an enlarged view of the portion encircled by a dotted line, at which time the adjustment belt is in a relaxed state;

[0100] Fig.26 for Fig.24Another 3A-3A cross-sectional view and an enlarged view of the portion encircled by a dotted line, at which time the adjustment belt is in a tensioned state;

[0101] Fig. 27 for Fig.24 Schematic diagram of the structure of the adjustment belt and the self-locking mechanism in the child carrier

[0102] Fig.28 for Fig. 27 3B-3B sectional view of;

[0103] Fig.29 for Fig. 27 Exploded diagram of

[0104] Fig.30 A cross-sectional view of a child carrier according to another embodiment of the third aspect of the present application and an enlarged view of a portion enclosed by a dotted line, wherein the adjustment belt is in a relaxed state;

[0105] Fig.31 for Fig.30 Another cross-sectional view of the child carrier and an enlarged view of the portion encircled by a dotted line, in which the adjustment belt is in a tightened state;

[0106] Fig.32 for Fig.30 A schematic diagram of the structure of the shoulder strap buckle, crotch strap assembly and self-locking mechanism in the child carrier shown;

[0107] Fig.33 for Fig.32 3C-3C cross-sectional view;

[0108] Fig.34 for Fig.32 Exploded diagram.

[0109] Reference numerals list

[0110] 11A, 11 Child Safety Seat

[0111] 1100A, 1100 seat belt length adjustment structure

[0112] 1110A, 1110 lock block

[0113] 1111 Locking part

[0114] 1112 Release Department

[0115] 1113 Pivot shaft

[0116] 1120A, 1120 fixed seat

[0117] 1121A, 1121 fixing holes

[0118] 1122A, 1122 exit

[0119] 1123A, 1123 support

[0120] 1130 Cover

[0121] 1131 Covering

[0122] 11311 Upper wall of cover

[0123] 11312 Covering side wall

[0124] 1132 Export Department

[0125] 11321 Exit upper wall

[0126] 11322 Exit side wall

[0127] 1133 Perforation

[0128] 1134 concave part

[0129] 1135 Perforation

[0130] 1136 Connecting convex

[0131] 1137 Gap

[0132] 1138 rear wall 1200A, 1200 seat

[0133] 1210A, 1210 opening 1211 connection groove

[0134] 1212 bottom wall

[0135] 1213 Back Wall

[0136] 1214 side wall

[0137] 1300A, 1300 backrest

[0138] 1400A, 1400 headrest

[0139] 1500A, 1500 Wings 1600A, 1600 Seat Belt Assembly 1610A, 1610 Shoulder Straps

[0140] 1620A, 1620 belt

[0141] 1630A, 1630 adjustment belt

[0142] 1631 Adjustment Segment

[0143] 1632 connection section 1700 buckle

[0144] 1710 connecting belt

[0145] 1810 vertical roller

[0146] 1811 vertical rivets

[0147] 1820 horizontal roller

[0148] 1821 Horizontal Rivet 12A Base

[0149] 1A-1A hatch line

[0150] 21 Seat body

[0151] 2100 Seat belt length adjustment structure 2110 Lock block

[0152] 2120 Fixed seat

[0153] 2130 Cover

[0154] 2200 Seat

[0155] 2210 Opening

[0156] 2212 bottom wall

[0157] 2213 Back Wall

[0158] 2214 side wall

[0159] 2215 Adjustment belt inlet

[0160] 2216 Adjustment belt outlet

[0161] 2220 Installation Department

[0162] 2221 mounting hole 2300 backrest

[0163] 2310 reinforcement rod 2400 headrest

[0164] 2500 Flanking

[0165] 2600 Seat belt assembly

[0166] 2610 shoulder strap

[0167] 2630 Adjustment belt

[0168] 2631 bending section

[0169] 2640 connector 2700 fastener

[0170] 2710 connecting belt 2800 safety belt buffer mechanism

[0171] 2810 Fixed bracket

[0172] 2811 on the wall

[0173] 2812 side wall

[0174] 2813 fixing hole

[0175] 2814 buffer support

[0176] 2815 guide rod support

[0177] 2816 buffer tank

[0178] 2817Piercing

[0179] 2818 Fixed pin support

[0180] 2819 Gap

[0181] 2820 buffer parts, buffer rods

[0182] 2821 Club Head

[0183] 2830 guide parts, guide rods

[0184] 2831 Club Head

[0185] 2840 elastic parts

[0186] 2850 Fasteners

[0187] 2860 limit pin

[0188] 2861 Pin Head

[0189] 2870 Fixed pin

[0190] 2871 Pin Head

[0191] 2I-2I hatch line

[0192] 2II-2II hatching line

[0193] 310, vehicle body; 311, seat portion; 311a, accommodating cavity; 311b, opening; 312, backrest portion; 313, seating space; 320, safety belt assembly; 3100, shoulder belt assembly; 3110, first end; 3120, shoulder belt body; 3130, shoulder belt buckle; 3200, crotch belt assembly; 3210, third end; 3220, fourth end; 3230, crotch belt body; 3240, crotch belt buckle; 3300, adjustment belt; 3310, fifth end; 3400, Self-locking mechanism; 3410, mounting seat; 3411, winding portion; 34111, outer wall; 34112, first limiting rod; 34113, first penetration opening; 3412, mounting portion; 34121, first mounting groove; 34122, through hole; 3420, driving member; 3421, driving body; 34211, third mounting groove; 34212, mounting recess; 34213, first set convex; 34214, matching inclined surface; 34215, matching plane; 3422 , driving convex; 3430, locking member; 3431, locking body; 3432, mounting convex portion; 33440, fixing frame; 441, frame body; 34411, penetration groove; 34412, limiting portion; 3442, first fixing portion; 3443, second fixing portion; 3451, first reset member; 3452, second reset member; 3460, pushing member; 3461, pushing portion; 34611, pushing inclined surface; 34612, pushing plane; 3462, winding end; 3 4621, winding surface; 3463, second limiting rod; 3464, second penetration opening; 3465, through groove; 3466, second mounting groove; 3467, second sleeve convex; 3471, first guide rod; 3472, second guide rod; 3473, limiting pin; 3500, rotating seat; 3510, rotating disk; 3511, pushing convex; 3520, connecting rod; 3600, pin shaft; 3700, length adjustment mechanism; 3800, fixed seat; 3101, pulling gap. DETAILED DESCRIPTION

[0194] While the present disclosure is illustrated and described herein with reference to particular embodiments, the disclosure should not be limited to the details shown. Rather, various modifications may be made to the details within the scope and range of equivalents of the claims and without departing from the disclosure.

[0195] The descriptions of directions such as “front”, “rear”, “up” and “down” involved in this article are only for the convenience of understanding. The present disclosure is not limited to these directions, but can be adjusted according to actual conditions. Although the present application has been described with reference to typical embodiments, the terms used are illustrative and exemplary rather than restrictive terms.

[0196] In order to adjust the length of the seat belt of a child safety seat, a child safety seat is generally provided with a seat belt length adjustment structure (Harness Adjustment Lock) in front of the seat. The adjustment belt of the seat belt group will pass through the seat belt length adjustment structure, and the length of the seat belt group can be adjusted by adjusting the adjustment belt. When adjusting the length of the seat belt of a child safety seat on the market, friction occurs between the adjustment belt and the base, causing the edge of the adjustment belt to wear, causing complaints from consumers.

[0197] The first aspect of the present disclosure:

[0198] Figure 1 A stereoscopic view and a partial view of a child safety seat (also referred to as a child carrier according to the third aspect of the present disclosure) 11A are shown, and the partial view mainly shows the structure of a seat belt length adjustment structure 1100A. The child safety seat 11A is, for example, a child carrier, which can be combined with a base 12A below, and the base 12A is detachably fixedly connected to a vehicle seat. The child safety seat 11A includes a base 1200A, a backrest 1300A, a headrest 1400A, side wings 1500A on both sides of the backrest 1300A and the headrest 1400A, and a seat belt assembly 1600A. The seat belt assembly 1600A includes a seat belt composed of a shoulder belt 1610A and a waist belt 1620A, and an adjustment belt 1630A, and the adjustment belt 1630A is connected to the shoulder belt 1610 at the rear side of the child safety seat 11A for adjusting the length of the shoulder belt 1610A. The shoulder strap 1610A and the waist belt 1620A may be manufactured separately or may be manufactured from one safety belt.

[0199] The child safety seat 11A also includes a seat belt length adjustment structure 1100A, which is located in a recessed opening portion 1210A in the middle of the front edge of the seat 1200A. The opening portion 1210A includes a bottom wall 1212A, a rear wall 1213A and two side walls 1214A, and the side walls 1214A are basically perpendicular to the bottom wall 1212A and the rear wall 1213A.

[0200] The inventors found in their research that parents (users) of infants and young children often pull the adjustment belt 1630A from one side to adjust the length of the safety belt 610A when the child safety seat 11A is facing the front or rear of the vehicle. For example, when the child safety seat 11A is installed on the left seat of the second row of the vehicle and the user sits on the right seat of the second row of the vehicle, the user attempts to pull the end of the adjustment belt 1630A located at the front end of the base 12A from the right side in order to adjust the length of the safety belt 610A (shoulder strap) of the child safety seat 11A. At this time, the movement direction of the adjustment belt 1630A being pulled is not toward the front of the base 12A, but toward the right side or the upper right side. As a result, friction is generated between the right edge of the adjustment belt 1630A and the right side wall of the opening 1210A of the base 12A, which may cause wear and fuzzing of the edge of the adjustment belt 1630A.

[0201] The locking member of the seat belt length adjustment structure 1100A includes a fixed seat 1120A, a locking block 1110A pivotally connected to the fixed seat 1120A, and a reset member (not shown) that constantly biases the locking block 1110A toward the locked position. The locking block 1110A is, for example, pivotally connected to the supports 1123A raised on both sides of the fixed seat 1120A, and is maintained in the locked position via the reset member. When the locking block 1110A is in the locked position, the adjustment belt 1630A of the seat belt or shoulder belt 1610A of the seat belt assembly 1600A, such as the adjustment webbing, is locked at the outlet 1122A between the fixed seat 1120A and the locking block 1110A, so that the length of the shoulder belt 1610A adapted to the currently seated child is maintained. When the length of the shoulder strap 1610A is not suitable for a child, the user can press the rear of the locking block 1110A by hand through the gap above the locking block 1110A at the rear of the opening 1210A, for example, so that the front end of the locking block 1110A and the fixing seat 1120A forming the outlet 1122A is pivotally lifted, so that the adjustment belt 1630A can be partially pulled out or retracted from the seat 1200A to adjust the shoulder strap 1610A. The fixing seat 1120A is fixed to the bottom wall 1212A of the opening 1210A by means of fixing holes 1121A, for example, by rivets, and only the two front fixing holes 1121A are shown here.

[0202] The lock block 1110A locks the adjustment belt 1630A at different positions to adjust the use length of the shoulder belt 1610A. When the user operates the adjustment belt 1630A from the side of the child safety seat 11A, for example, during vehicle driving, the adjustment belt 1630A is often not pulled perpendicularly to the seat 1200, but may be pulled to one side, causing the edge of the adjustment belt 1630A to rub against the edge of the seat 1200A or the opening 1210A, causing the adjustment belt 1630A to be worn and fluffed, affecting the appearance and causing consumer complaints. If the adjustment belt 1630A is pulled diagonally upward, the adjustment belt 1630A may also be clamped in the gap between the fixing seat 1120A and the lock block 1110A, and the user cannot pull the adjustment belt 1630A, making the adjustment function ineffective.

[0203] Figure 2 A perspective view and a partial view of a child safety seat 11 according to an embodiment of the present disclosure are shown. The partial view mainly shows the structure of a safety belt length adjustment structure 1100. The cross-sectional view according to the section line 1A-1A in the partial view is shown in FIG. Figure 5 and Figure 7 Two embodiments are shown in the figure. According to the present disclosure, the child safety seat 100 includes a base 1200, a backrest 1300, a headrest 1400, side wings 1500 located on both sides of the backrest 1300 and the headrest 1400, and a safety belt assembly 1600. The safety belt assembly 1600 includes a safety belt composed of a shoulder belt 1610 and a waist belt 1620, and an adjustment belt 1630. The adjustment belt 1630 and the shoulder belt 1610 are connected to each other at the rear side of the child safety seat 11 for adjusting the length of the shoulder belt 1610. The adjustment belt 1630 has an adjustment section 1631 extending from the outside of the child safety seat 11 and a connection section 1632 located inside the child safety seat 11 (see Figure 5 , 7 ), the connecting section 1632 is connected to the shoulder strap 1610 of the safety belt, the adjusting section 1631 passes through the seat portion 1200 from the opening 1210, and the edge of the adjusting section 1631 is opposite to the side wall 1214 of the opening 1210. The shoulder strap 1610 and the waist belt 1620 can be manufactured separately or made of one safety belt.

[0204] from Figure 2 The buckle 1700 and the connecting belt 1710 connecting the buckle 1700 to the seat 1200 can also be seen as an example. The buckle 1700 is used to buckle the safety belt of the child safety seat 11 or the joint of the shoulder belt 1610 and the waist belt 1620. The other end of the shoulder belt 1610 is connected to the adjustment belt 1630 at the rear of the child safety seat 11. The length of the shoulder belt 1610 buckled to the buckle 1700 can be adjusted by adjusting the belt 1630 to adapt to the child's riding needs, so that the child is safely fixed in the child safety seat 11.

[0205] According to the present disclosure, the child safety seat 11 includes a safety belt length adjustment structure 1100, which is located in an opening 1210 in the middle of the front edge of the seat 1200 and includes a cover 1130, which is fixed in the opening 1210 by two vertical rivets 1810, for example, and covers the safety belt length adjustment structure 1100. The shape of the cover 130 matches the shape of the seat 1200 to improve the riding comfort. The cover 1130 and the opening 1210 are configured to form an adjustment belt hole and a release hole; the adjustment belt hole and the release hole are arranged at intervals, and the adjustment section 1631 is penetrated at the adjustment belt hole, and the release part 1112 of the locking member of the adjustment belt 1630 is exposed outside the cover 1130 through the release hole. The user inserts a finger into the release hole and presses the release part 1112 to pivot, so as to achieve the unlocking of the lock block 1110A to avoid accidental touch.

[0206] According to the present disclosure, a protective device or roller is provided between the cover 1130 and the seat 1200A. The protective device is, for example, a vertical roller 1810 and is respectively sleeved on two vertical rivets 1811 located on both sides of the adjustment belt 1630. The vertical roller 1810 is located between the side wall 1214 and the adjustment section 1631 of the adjustment belt 1630. According to the present embodiment, the vertical roller 1810 includes a first vertical roller and a second vertical roller. The first vertical roller and the second vertical roller are respectively located on both sides of the width direction of the adjustment belt 1630. The spacing between the first vertical roller and the second vertical roller is greater than the width of the adjustment belt 1630. Additionally or alternatively, the vertical roller 1810 can be pivotally connected to at least one of the seat 1200 and the cover 1130 through the vertical rivet 1811. In some embodiments, the upper end of the vertical rivet 1811 is only fixed at the cover 1130 to reduce the cost of production and assembly. In some other embodiments, the upper end of the vertical rivet 1811 is fixed to the cover 1130 , and the lower end is fixed to the upper surface of the child safety seat 11 , so that the vertical roller 1810 is fixed more firmly.

[0207] According to this embodiment, the height of the outlet portion 1132 of the cover body 130 is lower than the height of the covering portion 1131, the outlet portion 1132 covers the vertical roller 1810, the covering portion 1131 of the cover body 130 partially covers the locking member or the locking block 1112 of the locking member, and the covering portion 1131 forms an escape space for the pivoting movement of the locking block 1112. The height of the outlet portion 1132 is relatively low, which limits the range of movement of the adjustment belt in the vertical direction, thereby avoiding incomplete engagement between the adjustment belt and the locking block 1112 due to flipping, folding, etc. The vertical roller is arranged at the outlet portion 1132, and a vertical roller with a smaller height can be used to reduce costs; or a roller with an inner concave surface on the outer circumference can further reduce the friction between the adjustment belt and the vertical roller.

[0208] When the user operates the adjustment belt 1630 from both sides of the child safety seat 11 and accidentally squeezes the adjustment belt 1630 toward both sides of the seat 1200 due to limited space, the vertical roller 1810 can roll relative to the vertical rivet 1811, thereby reducing the friction between the adjustment belt 1630 and other components and reducing the wear of the adjustment belt 1630. At the same time, due to the rolling effect of the vertical roller 1810, the adjustment belt 1630 is prevented from getting stuck with other components, so that a good user experience can be obtained.

[0209] Figure 3 A three-dimensional view of a cover body 1130 according to an embodiment of the present disclosure is shown. The cover body 1130 includes a covering portion 1131 and an outlet portion 1132, which are integrally formed or manufactured and combined separately. The covering portion 1131 is used to cover the safety belt length adjustment structure 1100, and the outlet portion 1132 is used to adjust the entry and exit of the belt 1630.

[0210] The cover portion 1131 includes a cover portion upper wall 11311 and a cover portion side wall 11312. The shape of the cover portion upper wall 11311 can be adapted to the surrounding components. For example, it is designed as a concave portion at the rear end, or it can be designed as a flat portion. A notch 1137 is provided on the lower side of the cover portion side wall 11312. The notch 1137 is used to avoid the components of the covered safety belt length adjustment structure 1100, such as the support 1123 of the pivot axis of the locking block 1110. For example, it can be designed as an arc as shown in the figure. The cover portion side wall 11312 is also provided with a connecting protrusion 1136, which connects to the connecting groove 1211 on the opening 1210 of the seat portion 1200 (see FIG. 11). Figure 4 , Figure 6 ) are connected to fix the cover body 1130 to the opening portion 1210.

[0211] The upper wall 11311 of the covering portion also has a recessed portion 1134 at the front, and a through hole 1135 for the transverse rivet 1820 to pass through is arranged in the recessed portion 1134. The head of the transverse rivet 1820 can pass through the through hole 1135 and be accommodated in the recessed portion 1134, so that the transverse rivet 1820 can be more firmly engaged with the cover body 1130.

[0212] The outlet portion 1132 includes an outlet upper wall 11321 and an outlet side wall 11322 to form an inlet and outlet of the adjustment belt 1630. A through hole 1133 for the vertical rivet 1811 to pass through is provided on the outlet upper wall 11321, and two through holes 1133 are respectively located on both sides of the outlet upper wall 11321.

[0213] Figure 4A perspective view and a partial view of a child safety seat according to an embodiment of the present disclosure are shown, wherein the partial view mainly shows the structure of a seat belt length adjustment structure 1100 . Figure 4 Removed Figure 2 and Figure 3 The cover 1130 shown in the figure exposes the safety belt length adjustment structure 1100. The safety belt length adjustment structure 1100 includes a locking member in an opening 1210 in the middle of the front edge of the seat 1200. The locking member is sleeved at the adjustment section 1631 of the adjustment belt 1630 to operably lock the adjustment belt 1630. The locking member includes a fixed seat 1120, a locking block 1110 pivotally connected to the fixed seat 1120, and a reset member (not shown) that constantly biases the locking block 1110 toward the locked position. The locking block 1110 has a locking portion 1111, a release portion 111 for unlocking, and a pivot shaft 1113. When the locking member locks the adjustment belt 1630, the adjustment belt 1630 is clamped between the fixed seat 1120 and the locking block 1110. The locking block 1110 is, for example, pivotally connected to the raised side portions on both sides of the fixing seat 1120 and is held in the locked position via a reset member. When the locking block 1110 is in the locked position, the adjustment belt 1630, for example, the adjustment webbing, of the shoulder belt 1610 of the child safety seat 11 is locked at the outlet 1122 between the fixing seat 1120 and the locking block 1110, so that the length of the shoulder belt 1610 adapted to the child currently sitting is maintained. When the length of the shoulder belt 1610 is not adapted to the child, the user can, through the gap above the locking block 1110 at the rear of the opening 1210, for example, press the rear of the locking block 1110 by hand, so that the front end of the locking block 1110 that forms the outlet 1122 with the fixing seat 1120 is pivotally lifted, so that the adjustment belt 1630 can be partially pulled out or retracted from the seat 1200. The fixing seat 1120 is fixed to the bottom wall of the opening 1210 by means of fixing holes 1121, for example, by rivets, and only two front fixing holes 1121 are shown here. According to this embodiment, the locking member is arranged at the opening 1210 and is sleeved on the adjustment section 1631 of the adjustment belt 1630, so as to operably lock the adjustment belt 1630, and the vertical roller 1810 is closer to the end of the adjustment section 1631 than the locking member.

[0214] According to the present disclosure, in front of the fixing seat 1120, vertical rollers 1810 and vertical rivets 1811 are arranged on both sides at the front end of the opening 1210, and are located on the side of the adjustment section 1631 of the adjustment belt 1630 in the width direction, and the vertical roller 1810 is closer to the end of the adjustment section 1631 than the locking piece. The adjustment belt 1630 is pulled out from the outlet 1122 and passes between the two vertical rollers after crossing the fixing hole 1121. The vertical roller 1810 is preferably made of plastic or other soft materials, and the shape of the vertical roller 1810 can be set to a cylindrical roller or a concave roller or other forms of rollers.

[0215] Figure 4 It can also be seen that the connection groove 1211 is arranged on the side wall of the opening 1210. The connection groove 1211 is symmetrically arranged on the two side walls of the opening 1210 and is used to install and fix the cover 1130. Figure 3 The connection protrusion 1136 on the side wall 1312 of the cover body 1130 is plug-connected with the connection groove 1211 to fix the cover body 1130 in the opening 1210 .

[0216] Figure 5 A side cross-sectional view of a cover body 1130 and a seat belt length adjustment structure 1100 according to an embodiment of the present disclosure is shown. Figure 2 The section line 1A-1A in Figure 4 Embodiment of the invention.

[0217] The locking block 1110 includes a locking portion 1111, a release portion 1112 and a pivot shaft 1113. The pivot shaft 1113 is supported on a support 1123 formed on both sides of the fixed seat 1120, for example, so that the locking block 1110 can pivot. The locking portion 1111 is designed to have a toothed structure at the lower end. When the locking block 1110 is in the locked position, the toothed structure presses the adjustment belt 1630 against the fixed seat 1120 to lock the use length of the shoulder strap. The release portion 1112 can be designed as a pressing plate as shown in the figure. The user can press the upper side of the pressing plate by hand to overcome the force of the reset member (not shown), such as a torsion spring, etc., which constantly causes the locking block 1110 to lock the adjustment belt 1630, so that the release portion 1112 pivots downward, and the locking portion 1111 is lifted to release the adjustment belt 1630 for adjustment.

[0218] The shape of the cover 1130 is adapted to the seat 1200. The head of the vertical rivet 1811 extends from the upper side of the outlet 1132 for fixing, and the vertical roller 1810 sleeved outside the vertical rivet 1811 is located between the outlet 1132 and the seat 1200 and can rotate freely to avoid wear of the adjustment belt 1630. A rear wall 1138 is provided at the rear of the cover 1131, which closes the gap between the cover 1131 and the locking block 1110 above the locking block 1110 and facilitates the opening for operating the locking block 1110.

[0219] Figure 6A perspective view and a partial view of a child safety seat 11 according to another embodiment of the present disclosure are shown, and the partial view mainly shows the structure of the safety belt length adjustment structure 1100. According to this embodiment, a transverse roller 1820 is further provided in the opening 1210, which is used to prevent the adjustment belt 1630 from rubbing against the cover 1130 or other structures on the seat 1200 when the adjustment belt 1630 is pulled upward. According to this embodiment, the transverse roller 1820 is provided between the vertical roller 1810 and the outlet 1122, located above the adjustment belt 1600, and connected to the cover 1130 by, for example, a transverse rivet 1821. Alternatively, the transverse roller 1820 can also be rotatably provided between the two side walls of the opening 1210 by other means, such as a rotating shaft. The transverse roller 1820 limits the adjustment belt 1630 from being pulled upward, and can prevent the adjustment belt 1630 from being clamped in the gap between the fixing seat 1120 and the locking block 1110. Meanwhile, when adjusting the adjusting belt 1630 , if the adjusting belt 1630 is pulled upward, the adjusting belt 1630 and the transverse roller 1820 are in rolling contact, and the smoothness of sliding of the adjusting belt 1630 will not be affected.

[0220] According to the present disclosure, the transverse roller 1820 extends along the width direction of the adjustment section 1631, and the transverse roller 1820 and the bottom wall 1212 of the opening 1210 respectively adjust the two sides of the thickness direction of the belt 1630. The transverse roller 1820 is located between the vertical roller 1810 and the locking member or the locking block 1110, and the projection of the transverse roller 1820 on the side wall 1214 of the opening 1210 partially overlaps with the projection of the vertical roller 1810 on the side wall 1214, that is, the spacing between the vertical roller 1810 and the transverse roller 1820 is reduced to prevent the adjustment belt from being stuck in the gap between the vertical roller 1810 and the transverse roller 1820. The length of the transverse roller 1820 is greater than the spacing between the rotation axis of the first vertical roller and the rotation axis of the second vertical roller. In some embodiments, the length of the transverse roller 1820 is less than the spacing between the rotation axis of the first vertical roller and the rotation axis of the second vertical roller, and greater than the spacing between the first vertical roller and the second vertical roller (i.e., the first vertical roller and the second vertical roller).

[0221] Figure 7 A side cross-sectional view of a cover body 1130 and a seat belt length adjustment structure 1100 according to another embodiment of the present disclosure is shown. Figure 2 The section line 1A-1A in FIG. Figure 5 Embodiment of the invention.

[0222] The locking block 1110 includes a locking portion 1111, a release portion 1112, and a pivot shaft 1113. The pivot shaft 1113 is supported on a support 1123 formed on both sides of the fixing seat 1120, for example, so that the locking block 1110 can pivot. The locking portion 1111 is designed to have a lower tooth structure or a rough surface structure to increase the friction between the locking portion 1111 and the adjustment belt. The tooth structure can press and lock the adjustment belt 1630 at the locking position of the locking block 1110. The release portion 1112 can be designed as a pressing plate as shown in the figure. The user can press the upper side of the pressing plate by hand to overcome the force of the reset member (not shown), such as a torsion spring, etc., which constantly causes the locking block 1110 to lock the adjustment belt 1630, so that the release portion 1112 pivots downward, and the locking portion 1111 is lifted, releasing the adjustment belt 1630 for adjustment.

[0223] The shape of the cover 1130 is adapted to the seat 1200. The head of the vertical rivet 1811 extends from the upper side of the outlet 1132 for fixing, and the vertical roller 1810 sleeved outside the vertical rivet 1811 is located between the outlet 1132 and the seat 1200 and can rotate freely to avoid wear of the adjustment belt 1630. A rear wall 1138 is provided at the rear of the cover 1131, which closes the gap between the cover 1131 and the locking block 1110 above the locking block 1110 and facilitates the opening for operating the locking block 1110.

[0224] According to this embodiment, a transverse rivet 1820 can be seen, and the transverse rivet 1820 can be fixed on the cover 1130, for example, Figure 3 In the perforations 1135 shown, the transverse roller 1820 is sleeved on the transverse rivets 1821 and rolls freely to prevent the adjustment belt 1630 from rubbing upward against the cover 1130 or other components. In some embodiments, the cover may not be provided, and the transverse roller 1820 may be directly provided on the child safety seat 11 through the transverse rivets 1821.

[0225] According to the present disclosure, the transverse roller 1820 extends along the width direction of the adjustment section 1631 of the adjustment belt 1630, that is, the direction of the rotation axis of the transverse roller 1820 is orthogonal to the movement direction of the adjustment belt 1630. The transverse roller 1820 and the bottom wall 1212 are respectively arranged on both sides of the thickness direction of the adjustment belt 1630. In some embodiments, the transverse roller 1820 is located between the vertical roller 1810 and the locking member or the locking block 1110, and is close to one side of the vertical roller 1810. The width of the rotation surface of the transverse roller 1820 is greater than the minimum spacing between the rotation surfaces of the two vertical rollers 1810, and is less than the spacing between the rotation axes of the two vertical rollers 1810. The rotation surface of the transverse roller 1820 partially overlaps with the rotation surface of the vertical roller 1810 in the width direction. In other words, the projection of the transverse roller 1820 on the side wall partially overlaps with the projection of the vertical roller 1810 on the side wall. This makes the distance between the transverse roller 1820 and the vertical roller 1810 compact, reducing the adjustment belt being stuck in the gap between the transverse roller 1820 and the vertical roller 1810.

[0226] According to the disclosed child safety seat 11, a structure is provided at the outlet 1122 of the adjustment belt 1630 of the safety belt length adjustment structure 1100 of the child safety seat 11. When the adjustment belt 1630 is pulled, the structure prevents the adjustment belt 1630 from swinging left and right, which prevents the adjustment belt 1630 from being pulled too far to the left or right, thereby preventing the adjustment belt 1630 from rubbing against the child safety seat 11.

[0227] Specifically, a roller structure is provided at the outlet 1122 of the adjustment belt 1630 of the safety belt length adjustment structure 1100 of the child safety seat 11. When the adjustment belt 1630 is pulled, the adjustment belt 1630 contacts the roller, and the roller rotates, and the friction between the two is small.

[0228] By arranging rollers on the left and right sides of the outlet of the adjustment belt 1630 of the seat belt length adjustment structure 1100, the adjustment belt 1630 is prevented from being scratched by contact and friction with the child safety seat 11, and the roller rotates when the adjustment belt 1630 is adjusted, and the friction between the two is small. In addition, a transverse roller 1820 is also arranged on the top of the outlet of the adjustment belt 1630 to prevent the adjustment belt 1630 from being clamped due to excessive upward pulling, and at the same time, the contact friction between the adjustment belt 1630 and the roller is small, and the sliding is smooth.

[0229] With existing child safety seats, when an accidental collision occurs, the child is thrown forward and then directly contacts the seat body when coming back. Due to the large impact force, the seat belt may be tightened too tight while the seat belt is tightened, causing the child to be strangled, resulting in a secondary accident and injury.

[0230] The second aspect of the present disclosure:

[0231] Figure 8 A three-dimensional diagram of a child safety seat according to an embodiment of the present disclosure is shown. The child safety seat includes a safety belt length adjustment structure 2100, a seat portion 2200, a backrest portion 2300, a headrest portion 2400, side wings 2500, a safety belt assembly 2600, and a buckle 2700, wherein the seat portion 2200 and the backrest portion 2300 together constitute a seat body 21.

[0232] The safety belt assembly 2600 includes a shoulder belt 2610, a crotch belt 2620, an adjustment belt 2630, and a connector 2640. The shoulder belt 2610 is divided into two groups. The shoulder belt 2610 of each group can be integrally made of a webbing or the like. After the child sits in the child, the two webbings are respectively connected to the buckle 2700 through the connector 2640. The buckle 2700 is connected to the seat 2200 through the connecting belt 2710. The buckle 2700 has a flat opening at the bottom for the connecting belt 2710, such as a flexible fabric belt or the like, to pass through. Both ends of the connecting belt 2710 are connected to the seat 2200.

[0233] In this case, the fabric straps above the connector 2640 form the shoulder straps 2610, and the fabric straps below the connector 2640 form the crotch straps 2620. Figure 8 It can be seen that one end (i.e., the fixed end) of each shoulder strap 2610 is fixedly connected to the surface of the seat portion 2200, and the other end passes through the through hole provided in the backrest portion 2300 to enter the interior of the backrest portion 2300. The portion of the shoulder strap 2610 located inside the backrest portion 2300 is connected to one end of the adjustment belt 2630 also located at the rear side of the seat body 21, and the other end (i.e., the free end) of the adjustment belt 2630 passes through the opening of the safety belt length adjustment structure 2100 and the front end of the seat portion 2200 and extends out of the seat body 21. The free end of the adjustment belt 2630 is operably locked at the safety belt length adjustment structure 2100, and the user can adjust the length of the shoulder strap 2610 exposed outside the backrest portion 2300 by pulling the free end of the adjustment belt 2630. In some embodiments, the shoulder strap 2610 and the adjustment belt 2630 can be composed of a complete webbing. The adjustment belt 2630 can also be regarded as a part of the safety belt assembly.

[0234] The safety belt length adjustment structure 2100 is disposed in the middle of the front side of the seat 2200. By releasing and locking the adjustment belt 2630, the length of the shoulder belt 2610 can be adjusted to accommodate children of different body shapes. Figure 8 In the figure, a cover 2130 for covering the seat belt length adjustment structure 2100 can be seen, and the shape of the cover 2130 matches the seat 2200.

[0235] Fig.9AA cross-sectional perspective view and a partial enlarged view of a child safety seat according to an embodiment of the present disclosure are shown, wherein the seat body 21 is arranged according to Figure 8 The section line 2I-2I in the figure is schematically cut open, and the local enlarged view basically shows the position of the seat belt length adjustment structure 2100.

[0236] The buckle 2700 is inserted into the flexible connecting belt 2710, and the end of the flexible connecting belt 2710 is fixed to the upper surface of the seat 2200, so that the buckle 2700 is in the riding space surrounded by the seat 2200, the side wings 2500 and the backrest 2300, and after the child sits in, it is plugged into the safety belt assembly 2600 (not shown) to ensure the child's riding safety. According to this embodiment, the shoulder belt 2610 passes through the through hole in the backrest 2300 and extends downward to the lower side of the seat body 21.

[0237] From the partial enlarged view, the adjustment belt 2630, the safety belt length adjustment structure 2100 and the safety belt buffer mechanism 2800 can be seen. The free end of the adjustment belt 2630 extends from the lower rear part of the seat body 21, sequentially passes through the safety belt buffer mechanism 2800 and the safety belt length adjustment structure 2100, and then extends from the front side of the seat 2200.

[0238] The safety belt length adjustment structure 2100 is located in a recessed opening 2210 in the middle of the front edge of the seat 2200. The opening 2210 includes a bottom wall 2212, a rear wall 2213, and two side walls 2214. The side walls 2214 are substantially perpendicular to the bottom wall 2212 and the rear wall 2213. The safety belt length adjustment structure 2100 includes a locking member composed of a locking block 2110 and a fixing seat 2120, and a cover body 2130. The locking block 2110 is pivotally connected to the fixing seat 2120 and is held in the locking position by a reset member (not shown) that constantly biases the locking block 2110 toward the locking position. When the locking block 2110 is in the locking position, the adjustment belt 2630 of the shoulder belt 2610 of the safety belt assembly 2600, such as an adjustment webbing or the like, is locked at the adjustment belt outlet 2216 between the fixing seat 2120 and the locking block 2110, so that the length of the shoulder belt 2610 adapted to the currently seated child is maintained. When the length of the shoulder belt 2610 is not adapted to the child, the user can press the rear of the locking block 2110 by hand through the gap above the locking block 2110 at the rear of the opening 2210, such as by hand, so that the front end of the locking block 2110 that forms the adjustment belt outlet 2216 with the fixing seat 2120 is pivotally lifted, so that the adjustment belt 2630 can be partially pulled out or retracted from the seat 2200 to adjust the shoulder belt 2610. The fixing seat 2120 is fixed to the bottom wall 2212 of the opening 2210 by means of rivets, for example, by means of fixing holes. The adjustment belt 2630 enters the safety belt length adjustment structure 2100 from the adjustment belt entrance 2215 below the rear wall 2213, is basically placed flat on the fixing seat 2120 with its width side, and slides between the locking block 2110 and the fixing seat 2120, and finally extends out of the safety belt length adjustment structure 2100 through the adjustment belt exit 2216 formed by the cover body 2130 and the bottom wall 2212.

[0239] According to the present disclosure, a seat belt buffer mechanism 2800 is provided on the other side of the rear wall 2213 of the opening 2210, opposite to the seat belt length adjustment structure 2100. When the car carrying the seat body 21 decelerates urgently due to an accidental collision or other reasons, the child will move forward or backward, driving the seat belt to be tightened. When the seat belt is tightened, it needs to overcome the elastic force of the seat belt buffer mechanism 2800, thereby achieving buffering when the seat belt is tightened, and preventing the child from being strangled and injured when the seat belt is tightened.

[0240] The adjustment belt 2630 is adapted to the safety belt buffer mechanism 2800 and has a bending section 2631. With the buffering movement of the safety belt buffer mechanism 2800, the bending section 2631 changes its bending degree. Since the adjustment belt 2630 is made of a flexible material with elasticity, the change in the bending degree advantageously provides a buffering effect. According to the present disclosure, for example, when the locking block 2110 of the safety belt length adjustment structure 2100 locks the adjustment belt 2630, the bending section 2631 of the adjustment belt 2630 provides a longer adjustment margin for the adjustment belt, so that when the vehicle brakes or in an emergency, when the child's body rushes forward and drives the safety belt to move, the adjustment belt 2630 can provide the adjustment margin, so that the safety belt can better adapt to the distance of the child's forward rush, and the safety belt will not strangle the child.

[0241] After passing through the safety belt buffer mechanism 2800 , the adjustment belt 2630 enters the safety belt length adjustment structure 2100 from the adjustment belt entrance 2215 along the rear edge of the bottom wall 2212 in a manner parallel to the bottom wall 2212 .

[0242] The seat belt buffer mechanism 2800 includes a fixing frame 2810, a buffer 2820, a guide 2830, an elastic member 2840, a fastener 2850, and a stop pin 2860. According to the present disclosure, the fixing frame 2810 is used to fix the seat belt buffer mechanism 2800 to the seat body 21. The fixing frame 2810 includes an upper wall 2811, a side wall 2812, a buffer support 2814, a guide rod support 2815, and a buffer groove 2816. In particular, the upper wall 2811 of the fixing frame 2810 is fixed to the mounting portion 2220 by a fastener 2850, such as a bolt or a rivet. The mounting portion 2220 is configured to install the seat belt buffer mechanism 2800 and is located at the lower side of the seat portion 2200. The side wall 2812 is used to support the buffer 2820 and the guide rod 2830, wherein the buffer 2820 is movably disposed at the fixing frame 2810 and has a first position as shown in the figure (see also Fig.13 ), and the second position (see Fig.14 ), the seat belt assembly 2600 is configured to partially surround the buffer 2820. According to this embodiment, the buffer 2820 is slidably embedded in the buffer groove 2816 provided in the side wall 2812 and can be displaced, for example, slid, in the buffer groove 2816, and the adjustment belt 2630 is attached to the buffer 2820. The buffer groove 2816 is configured to be a long strip perpendicular to the adjustment belt 2630, and is used to buffer the force of the adjustment belt 2630 from the vertical direction. The limit pin 2860 of the seat belt buffer mechanism 2800 slides in the buffer groove 2816 and supports and drives the buffer 2820 to move, and the limit pin 2860 is inserted into the buffer 2820, for example.

[0243] 9 , the buffer 2820 is at the bottom of the buffer groove 2816 . In this case, the buffer 2820 is in a normal use state without emergency braking, etc. When the seat belt is tightened during manual adjustment of the seat belt length or emergency braking, the buffer 2820 can slide upward due to the upward force applied by the bent section 2631 of the adjustment belt 2630 .

[0244] According to the present disclosure, an elastic member 2840, such as a compression spring, is provided between the buffer member 2820 and the upper wall 2811. The elastic member 2840 is provided between the fixing frame 2810 and the buffer member 2820, or can also be provided between the seat body 21 and the buffer member 2820, and biases the buffer member 2820 in the direction of the first position. The elastic member 2840 always applies a thrust to the buffer member 2820, so that the upward movement of the buffer member 2820 is buffered by the elastic force of the elastic member 2840, thereby effectively preventing the risk of injury to the child due to the impact force. The buffer member 2820 is preferably configured as an arc or a semicircle on the side facing the adjustment belt 2630, and has a width corresponding to the width of the adjustment belt 2630. On the other side away from the adjustment belt 2630, the buffer member 2820 is designed as a cylindrical protrusion, for example, so that the elastic member 2840 can be inserted and fixed. According to this embodiment, as the adjustment belt 2630 is pulled intentionally or pulled unintentionally when the vehicle is impacted, the buffer member 2820 can advantageously pivot when sliding using the limit pin 2860 inserted into the buffer groove 2816. Due to the interaction between the buffer member 2820 and the adjustment belt 2630, the movement of the seat belt is further buffered.

[0245] The seat belt buffer mechanism 2800 further includes a guide member 2830 for guiding the direction in which the seat belt assembly 2600 passes through the seat belt buffer mechanism 2800. According to the present embodiment, the guide member 2830 is configured as a guide rod 2830, and the guide rod 2830 is advantageously rotatably supported in the fixing frame 2810, and is used to change the movement direction of the adjustment belt 2630. Specifically, the guide rod 2830 is configured to make the direction in which the adjustment belt 2630 passes into the seat belt buffer mechanism 2800 and the direction in which the adjustment belt 2630 passes out of the seat belt buffer mechanism 2800 parallel to each other. According to the present embodiment, two guide rods 2830 are respectively located on both sides of the buffer member 2820 along the direction of the adjustment belt 2630. Advantageously, the two guide rods 2830 are symmetrically arranged relative to the buffer member 2820, that is, arranged at the same height, so that the adjustment belt 2630 can provide a more uniform pulling force to the buffer member 2820.

[0246] Fig. 9B A cross-sectional perspective view and a partially enlarged view of a child safety seat according to an embodiment of the present disclosure are shown. Fig.9ADifferently, according to the present embodiment, a reinforcing rod 2310 is provided at the rear of the backrest 2300 , and each of the shoulder straps 2610 is configured to be connected to the adjustment belt 2630 after passing through the reinforcing rod 2310 from the upper position of the backrest 2300 .

[0247] According to this embodiment, the two ends of the reinforcing rod 2310 are, for example, rotatably fixed in the backrest portion 2300, and the shoulder strap 2610 extends downward after passing around the reinforcing rod 2310 between the two ends. The reinforcing rod 2310 allows the shoulder strap 2610 to extend in parallel for a distance after passing through the through hole of the backrest portion 2300, thereby improving the sliding performance of the shoulder strap 2610 at the through hole position.

[0248] Fig.10 A sectional side view and a partially enlarged view of a child safety seat according to an embodiment of the present disclosure are shown. Fig.10 The positions of the components in FIG. 9 correspond to those in FIG. 9 .

[0249] In this embodiment, the lock block 2110 does not lock the adjustment belt 2630, and the user can manually pull the adjustment belt 2630 to adjust the length of the safety belt. Advantageously, after the child sits in the seat body 21 and the safety belt is adjusted to a suitable length, the lock block 2110 locks the adjustment belt 2630, and the safety belt buffer mechanism 2800 can better play a buffering role.

[0250] The seat belt length adjustment structure 2100 is located in the opening 2210 of the seat 2200 and in front of the rear wall 2213. On the other hand, on the other side of the rear wall 2213, that is, in the inner space of the seat 2200, the seat belt buffer mechanism 2800 is installed on the mounting portion 2220 by means of a fastener 2850. After the adjustment belt 2630 extends from the rear side of the backrest 2300 to the lower side of the seat 2200, it first passes through the seat belt buffer mechanism 2800, passes through the left guide rod 2830, passes through the adjustment belt entrance 2815 in the rear wall 2213 in a substantially straight manner, slides on the fixing seat 2120 of the seat belt length adjustment structure 2100, and finally extends out of the seat 2200 through the adjustment belt exit 2216 formed between the cover 2130 and the bottom wall 2212 of the opening 2210. According to the present embodiment, advantageously, at least the guide rod 2830 close to the fixing seat 2120 is consistent in height with the upper side surface of the fixing seat 2120 of the seat belt length adjustment structure 2100 .

[0251] According to the present disclosure, the side wall 2812 of the fixing frame 2810 is advantageously designed as an inverted trident shape, with a buffer support 2814 in the middle and guide rod supports 2815 on both sides, in which the buffer 2820 and the guide rod 2830 can be pivotally supported. According to this embodiment, materials can be saved and weight can be reduced.

[0252] Fig.10 The configuration of the buffer 2820 can be better seen in FIG. According to this embodiment, the contact portion of the buffer 2820 with the adjustment belt 2630 is configured as an arc portion, and the connection portion with the elastic member 2840, such as a compression spring, is configured as a columnar portion, and a receiving portion for supporting the end of the compression spring is formed between the arc portion and the columnar portion. In the case where the seat belt is suddenly tightened due to an impact or emergency braking of the vehicle and the child's body rushing forward, the configuration of the buffer 2820 can effectively slow down the movement of the adjustment belt 2630.

[0253] According to the present disclosure, the material of the buffer 2820 can be selected to have a large friction force between the buffer and the adjustment belt 2630. Combined with the flexible tensile force of the adjustment belt 2630, the seat belt buffer mechanism 2800 can play a buffering role without the elastic member 2840. In this case, the buffer 2820 is fixedly arranged in the fixing frame 2810 of the seat belt buffer mechanism 2800.

[0254] Fig.11 A cross-sectional perspective view and a partial enlarged view of a child safety seat according to an embodiment of the present disclosure are shown, wherein the seat body 21 is arranged according to Figure 8 The section line 2I-2I in the figure is schematically cut open, and the local enlarged view basically shows the position of the seat belt length adjustment structure 2100.

[0255] Fig.11 In the embodiment of the present invention, the buffer member 2820 is in a buffering state. In this state, for example, the child's body rushes forward due to emergency braking, causing the adjustment belt 2630 to be suddenly pulled backward. At this time, the adjustment belt 2630 applies an upward force to the buffer member 2820, and the buffer member 2820 slides upward in the buffer groove 2816 under the drive of the limit pin 2860. As the buffer member 2820 moves, the elastic member 2840 is compressed, thereby increasing the elastic force and buffering the movement speed of the adjustment belt 2630.

[0256] Fig.12 A sectional side view and a partially enlarged view of a child safety seat according to an embodiment of the present disclosure are shown. Fig.12 The position of the components in corresponds to Fig.11 .

[0257] from Fig.12 It can be clearly seen that the buffer member 2820 moves upward along the buffer groove 2816 for a distance, thereby exposing the lower part of the buffer groove 2816, and the bending section 2631 of the adjustment belt 2630 between the two guide rods 2830 becomes flat due to the upward movement of the buffer member 2820, thereby buffering the movement of the safety belt connected to the adjustment belt 2630.

[0258] Fig.13A three-dimensional view of a seat belt buffer mechanism 2800 according to an embodiment of the present disclosure is shown. The seat belt buffer mechanism 2800 includes a fixing frame 2810, a buffer member 2820, a guide rod 2830, an elastic member 2840, and a stop pin 2860. The buffer member 2820 is in the first position at the lowermost end of the buffer groove 2816, that is, the buffer member 2820 is only subjected to the external force of the elastic member 2840 pushing downward.

[0259] The fixing frame 2810 includes an upper wall 2811, two side walls 2812 perpendicular to the upper wall 2811, a buffer support 2814, a guide rod support 2815 and a buffer groove 2816. According to the present embodiment, the buffer support 2814 and the guide rod support 2815 are formed by the side wall 2812, thereby forming an inverted trident shape. A long strip buffer groove 2816 is provided in the buffer support 2814, and the pin head 2861 of the limit pin 2860 of the buffer 2820 passes through the buffer groove 2816, so that the buffer 2820 can slide up and down along the buffer groove 2816 between the two side walls 2812, and the buffer 2820 can pivot around the limit pin 2860. One end of the elastic member 2840 abuts against the upper wall 2811, and the other end abuts against the buffer 2820, and the elastic force makes the buffer 2820 at the lowest end of the buffer groove 2816. A through hole 2817 is provided in the guide rod support 2815 for the rod head 2831 of the guide rod 2830 to pass through. Advantageously, the guide rod 2830 can pivot in the through hole 2817 .

[0260] The safety belt buffer mechanism 2800 further includes a fixing hole 2813 for fixingly connecting with the seat 2200. According to the present disclosure, at least two fixing holes 2813 are preferably provided to provide a more stable connection.

[0261] Fig.14 FIG. 2 shows a seat belt buffer mechanism 2800 according to an embodiment of the present disclosure. Fig.13 Differently, the buffer member 2820 slides to a second position at the upper end of the buffer groove 2816. At this time, the buffer member 2820 moves upward due to, for example, the adjustment belt 2630, thereby compressing the elastic member 2840. When the buffer member 2820 slides upward, the elastic member 2840 provides a buffering force for the upward movement. In addition, after, for example, emergency braking ends, due to the disappearance of the upward external force applied by the adjustment belt 2630, the compressed elastic member 2840 resets itself, so that the buffer member 2820 drives the adjustment belt 2630 to move downward, thereby being able to re-tighten the safety belt. According to the present disclosure, the safety belt can be tightened by itself to the initial position before emergency braking in a gentle manner, ensuring the comfort of the child while ensuring the child's riding safety.

[0262] According to the present disclosure, when the buffer 2820 is located at the first position, the contact length between the safety belt assembly 2600 and the buffer 2820 (for example, the length of the shoulder strap or the adjustment belt wrapped around the buffer rod) is greater than the contact length between the safety belt assembly 2600 and the buffer 2820 when the buffer 2820 is located at the second position. In the process of the buffer 2820 moving from the first position to the second position, the force arm between the adjustment belt and the buffer will gradually decrease, and the buffer force provided by the buffer mechanism will increase nonlinearly, which can provide a buffering effect with a small buffering force in the early stage and a large buffering force in the later stage for the child; it can also advantageously save the length of the spring. In some embodiments, the guide 2830 is arranged to be located between the first position and the second position in the extension direction of the safety belt assembly 2600, so as to increase the difference in the force arm between the safety belt assembly and the buffer when the buffer 2820 is in the first position and the second position. Optionally, when the buffer 2820 is located at the first position, the contact length between the seat belt assembly 2600 and the buffer 2820 is greater than twice the contact length between the seat belt assembly 2600 and the buffer 2820 when the buffer 2820 is located at the second position.

[0263] Fig.15 An exploded view and a partially enlarged view of a child safety seat according to an embodiment of the present disclosure are shown.

[0264] In the lower perspective view, the seat belt length adjustment structure 2100 together with the adjustment belt 2630 passing therethrough are separated from the seat portion 2200 , and the adjustment belt 2630 is provided with a bending section 2631 for the seat belt buffer mechanism 2800 next to the seat belt length adjustment structure 2100 .

[0265] The partially enlarged view shows an exploded view of the seat belt buffer mechanism 2800, from which the through hole 2817 for the guide rod 2830, the long strip buffer groove 2816 for the buffer member 2820, and the elastic member 2840 in the form of a compression spring can be more clearly seen. In addition, the mounting hole 2221 on the lower side of the seat 2200 for mounting the seat belt buffer mechanism 2800 and the fastener 2850 disposed between the mounting hole 2221 and the fixing frame 2810 can also be seen. The fastener 2850 passes through the fixing hole ( Figure 13-14 ) to firmly fix the fixing frame 2810 on the seat 2200.

[0266] The limiting pin 2860 and the buffer 2820 can be better seen from the partial exploded view, and the pin head 2861 of the limiting pin 2860 is spaced apart from the end side of the buffer 2820, thereby forming a sliding section for the buffer 2820 to slide in the buffer groove 2816. Rod heads 2831 are provided at both ends of the guide rod 2830 for pivotally limiting the guide rod 2830 in the through hole 2817.

[0267] Fig.16The bottom perspective view and partial enlarged view of the child safety seat according to another embodiment of the present disclosure are shown. Figure 8-15 The difference between the embodiments in FIG. 1 and FIG. 2 is that the seat belt buffer mechanism 2800 is different, and other components can be referred to in Figure 8-15 Embodiment of the invention.

[0268] According to the present embodiment, the adjustment belt 2630 extends from the rear side of the seat 2200 into the safety belt buffer mechanism 2800, and the safety belt buffer mechanism 2800 includes a fixing frame 2810, a buffer rod 2820, a guide rod 2830 for changing the direction of the adjustment belt 2630, an elastic member 2840, and a fixing pin 2870 for fixing the elastic member 2840. The fixing frame 2810 includes two side walls 2812, and the side walls 2812 are provided with a forwardly extending fixing pin support 2818 below the bottom wall 2212 of the opening portion 2210 for setting the safety belt length adjustment structure 2100, and are used to pivotally support the fixing pin 2870. A corresponding buffer groove 2817 is provided in each side wall 2812. The buffer groove 2817 is configured in a long strip parallel to the lower side of the seat 2200 and accommodates the buffer rod 2820. The length of the buffer rod 2820 and the fixing pin 2870 is greater than the distance between the two side walls 2812 of the fixing frame 2810, so that the head of the buffer rod 2820 and the pin head 2871 of the fixing pin 2870 extend out of the side wall 2812 and form a hooking portion of the end of the elastic member 2840 in the form of a tension spring. According to this embodiment, the guide rod 2830 is preferably rotatably supported between the two side walls 2812, so that the adjustment belt 2630 can bypass the buffer rod 2820 to change direction, and then bypass the guide rod 2830 to change direction again, so that it can enter the safety belt length adjustment structure 2100 from the rear wall 2213 of the opening 2210.

[0269] Advantageously, the fixing frame 2810 is abutted against the bottom wall 2212 and the rear wall 2213 of the opening 2210 on one side. According to this embodiment, since the fixing pin support 2818 extends forward for a distance below the bottom wall 2212, the distance between the fixing pin 2870 and the buffer rod 2820 is significantly greater than the distance between the guide rod 2830 and the rear wall 2213. According to this embodiment, the elastic member 2840 can be stretched to a greater distance, thereby providing a greater elastic force buffering effect, and since the distance between the guide rod 2830 and the rear wall 2213 is shorter, the travel of the adjustment belt 2630 entering the safety belt length adjustment structure 2100 is shorter, which is conducive to achieving a compact and efficient locking and buffering effect.

[0270] Fig.17 A cross-sectional perspective view and a partially enlarged view of a child safety seat according to another embodiment of the present disclosure are shown. Fig.16 The section line 2II-2II in the figure is cut open.

[0271] According to this embodiment, the adjustment belt 2630 first extends from the rear side of the seat 2200 to the buffer rod 2820, changes direction to the guide rod 2830 via the buffer rod 2820, then bypasses the guide rod 2830 and enters the safety belt length adjustment structure 2100 from the adjustment belt entrance 2215 in the rear wall 2213 of the opening portion 2210 substantially parallel to the lower side of the seat 2200, and finally extends from the front side of the seat 2200 via the adjustment belt exit 2261.

[0272] Fig.17 In the embodiment, the buffer rod 2820 is at the leftmost side of the buffer groove 2816, that is, it is in a normal use state where the safety belt is not suddenly tightened. For example, when emergency braking occurs, the child's body rushes forward, causing the safety belt to move suddenly, and the adjustment belt 2630 connected to the safety belt is pulled backward, thereby driving the buffer rod 2820 to move backward along the buffer groove 2816. At this time, one end of the elastic member 2840 hanging on the head of the buffer rod 2820 also moves backward, and the elastic member 2840 is stretched, so that the elastic force gradually increases, thereby buffering the backward movement of the buffer rod 2820. Due to the restriction of the buffer rod 2820, the movement speed of the adjustment belt 2630 is slowed down.

[0273] Also visible are fasteners 2850 at the upper wall 2811 of the fixing frame 2810 for fixing the fixing frame 2810 to the mounting portion 2210 of the seat 2200 .

[0274] Fig.18 A sectional side view and a partially enlarged view of a child safety seat according to another embodiment of the present disclosure are shown, Fig.18 The components in Fig.17 .

[0275] The fixing pin 2870 and the buffer rod 2820 are substantially at the same height, while the guide rod 2830 is higher relative to the buffer rod 2820 and substantially at the same height as the fixing seat 2120. The adjustment belt 2630 continuously passes around the buffer rod 2820 and the guide rod 2830, and after two direction reversals, a Z-shaped bending section 2631 is formed, so that the adjustment belt 2630 can enter the safety belt length adjustment structure 2100 at the height of the fixing seat 2120.

[0276] According to this embodiment, the resistance of the adjustment belt 2630 between the safety belt length adjustment structure 2100 and the safety belt buffer mechanism 2800 is smaller, and the adjustment belt 2630 is not easy to be stuck, and the user can pull the adjustment belt 2630 for adjustment with less force. In addition, for example, when the locking block 2110 of the safety belt length adjustment structure 2100 locks the adjustment belt 2630, the Z-shaped bending section 2631 of the adjustment belt 2630 provides a longer adjustment margin for the adjustment belt, so that when the vehicle brakes or in an emergency, when the child's body rushes forward and drives the safety belt to move, the adjustment belt 2630 can provide the adjustment margin, so that the safety belt can better adapt to the distance of the child's rushing forward, and the safety belt will not strangle the child.

[0277] from Fig.18 It can also be seen that the fixing frame 2810 is tightly attached to the rear wall 2213 and the bottom wall 2212 of the opening portion 2210 of the seat 2200, thereby forming a shape adaptation to the rear wall 2213 and the bottom wall 2212, thereby making the overall structure of the seat belt length adjustment structure 2100 and the seat belt buffer mechanism 2800 more compact and able to function efficiently.

[0278] Fig.19 A lower side sectional perspective view and a partial enlarged view of a child safety seat according to another embodiment of the present disclosure are shown.

[0279] According to this embodiment, at this time, for example, when an emergency brake of the vehicle occurs, the backward movement of the adjustment belt 2630 drives the buffer rod 2820 to slide to the rightmost end in the buffer groove 2816. During the sliding process, the elastic member 2840 is stretched, and the elastic force is continuously increased, which buffers the backward movement of the buffer rod 2820. At this time, the elastic member 2840 is stretched to the maximum length. After the emergency brake is released, the elastic force of the elastic member 2840 helps the adjustment belt 2630 and the safety belt connected to the adjustment belt 2630 to return to the normal working position. During the return process of the adjustment belt 2630, the rotatable guide rod 2830 advantageously hinders the return speed of the buffer member 2820 to avoid the adverse effects caused by the safety belt returning too fast.

[0280] Fig. 20 A sectional side view and a partially enlarged view of a child safety seat according to another embodiment of the present disclosure are shown, Fig. 20 The components corresponding to Fig.19 .

[0281] The adjustment belt 2630 is connected between the guide rod 2830 and the buffer rod 2820. Fig.18 The Z-shaped bending segment 2631 is transformed into Fig. 20In the shape shown in , the margin previously reserved by the adjustment belt 2630 is used to cushion the safety belt. According to one embodiment, in this state, the portion of the adjustment belt 2630 between the guide rod 2830 and the buffer rod 2820 is advantageously substantially perpendicular to each other with the adjacent portion, thereby achieving better mechanical action.

[0282] Fig.21 FIG. 2 is a perspective view of a seat belt buffer mechanism 2800 according to another embodiment of the present disclosure. The position of the buffer rod 2820 corresponds to Fig.16 , 17 、18.

[0283] The fixing frame 2810 is composed of an upper wall 2811 and two side walls 2812 perpendicular to the upper wall 2811. The side wall 2812 has a fixing pin support 2818 extending forward, thereby forming a notch 2818. In combination with the previous explanation, the edge of the notch 2818 abuts against the rear wall 2213 and the bottom wall 2212 of the opening 2210 of the seat 2200. The notch 2818 is rectangular, and can also adapt to the rear wall 2213 and the bottom wall 2212 having other shapes.

[0284] The elastic member 2840 is, for example, a tension spring, and its two ends form hanging loops. The hanging loop at one end of the tension spring is hung on the hanging portion of the fixing pin 2760 limited by the pin head 2871 and the side wall 2812. The pin head 2871 has a diameter greater than the hanging loop to prevent the tension spring from detaching from the fixing pin 2760. The hanging loop at the other end of the tension spring is hung on the hanging portion of the buffer rod 2820 limited by the rod head 2821 and the side wall 2812. The rod head 2871 has a diameter greater than the hanging loop to prevent the tension spring from detaching from the buffer rod 2820. In this case, the elastic member 2840 is advantageously not subjected to force, that is, it is in a relaxed state. The elastic member 2840 can also be slightly stretched, so that in the normal use state of the safety belt, the elastic member 2840 can also play a stabilizing role by elastic force.

[0285] The guide rod 2830 is similar in form to the fixing pin 2870 , but is shorter than the fixing pin 2870 . The rod head 2831 of the guide rod 2830 is used to pivotally fix the guide rod 2830 in the through hole 2817 at the side wall 2812 .

[0286] Fig. 22 FIG. 2 shows a seat belt buffer mechanism according to another embodiment of the present disclosure. The position of the buffer rod 2820 corresponds to Fig.19 , 13 .

[0287] and Fig.21Differently, the buffer rod 2820 is at the rightmost end of the buffer groove 2816, and the elastic member 2840 is pulled to the maximum length, and the vehicle is in an emergency state of emergency braking or impact. The elastic member 2840 provides a buffering force for the backward movement of the buffer adjustment belt 2630, and after the emergency state disappears, the adjustment belt 2630 can return to the normal position automatically as the buffer rod 2820 slides in the buffer groove 2816.

[0288] Fig.23 A bottom perspective view and a partially enlarged view of a child safety seat according to another embodiment of the present disclosure are shown.

[0289] In the lower perspective view, the seat belt length adjustment structure 2100 together with the adjustment belt 2630 passing therethrough are separated from the seat portion 2200 , and the adjustment belt 2630 is provided with a bending section 2631 for the seat belt buffer mechanism 2800 next to the seat belt length adjustment structure 2100 .

[0290] The partially enlarged view shows an exploded view of the seat belt buffer mechanism 2800, from which the through hole 2817 for the guide rod 2830, the through hole 2817 for the fixing pin 2870, the long strip buffer groove 2816 for the buffer member 2820, and the elastic member 2840 in the form of a tension spring can be more clearly seen. In addition, the mounting hole 2221 on the lower side of the seat 2200 for mounting the seat belt buffer mechanism 2800 and the fastener 2850 disposed between the mounting hole 2221 and the fixing frame 2810 can also be seen. The fastener 2850 passes through the fixing hole in the upper wall 2811 of the fixing frame 2810 to firmly fix the fixing frame 2810 on the seat 2200.

[0291] According to the present disclosure, the seat body 21 is provided with a seat belt buffer mechanism 2800 for the seat belt, which includes a buffer member 2820 (buffer block or buffer rod), an elastic member 2840 (spring or tension spring) and a buffer groove 2816 for the movement of the buffer member 2820, and includes a guide rod 2830. The seat belt passes through the guide rod 2830 and the buffer member 2820. Under the action of the elastic member 2820, the buffer member 2820 always presses against the adjustment belt 2630 of the seat belt to form a buffer section. In this way, when the seat body 21 is impacted, the child will move forward or backward, which will drive the seat belt to be tightened. When the seat belt is tightened, it needs to overcome the elastic force of the elastic member 2820, thereby achieving buffering when the seat belt is tightened, avoiding the child from being strangled and injured when the seat belt is tightened.

[0292] The present invention solves the technical problem that the existing safety belt has no buffering function or has a poor buffering effect. The present invention is specifically implemented by a buffering member 2820, an elastic member 2840 and a buffering groove 2816 for the movement of the buffering member 2820. The mechanism is relatively simple and easy to implement. In addition, the safety belt buffering mechanism 2800 is arranged at one end of the safety belt close to the adjustment belt 2630, so that the part of the safety belt that contacts the child is far away from the safety belt buffering mechanism 2800, forming a longer force arm, so that when the safety belt is tightened, the buffering effect can be enhanced.

[0293] The third aspect of the present disclosure:

[0294] like Fig.24 As shown, an embodiment of the present disclosure provides a child carrier (also referred to as a child safety seat according to the first and second aspects of the present disclosure), which may be, for example, a car safety seat, an infant carrier, or a child stroller. The child carrier includes a carrier body 310 and a safety belt assembly 320 mounted on the carrier body 310. The safety belt assembly 320 can be automatically locked after being tightened to the right position, thereby preventing the safety belt assembly 320 from being over-tightened and affecting the comfort of the child or causing other safety hazards. The structure of the child carrier is described in detail below, taking the child carrier as a car safety seat as an example.

[0295] like Fig.24 As shown, the carrier body 310 includes a seat portion 311 and a backrest portion 312 connected to each other. A seating space 313 for accommodating a child is formed between the seat portion 311 and the backrest portion 312. A safety belt assembly 320 is installed on the carrier body 310.

[0296] Specifically, Figure 24 to Figure 26As shown, the safety belt assembly 320 includes a shoulder belt set 3100, a crotch belt set 3200, an adjustment belt 3300 and a self-locking mechanism 3400. The shoulder belt set 3100 has a first end 3110 and a second end (not shown in the drawings), the crotch belt set 3200 has a third end 3210 and a fourth end 3220, and the adjustment belt 3300 has a fifth end 3310 and a sixth end (not shown in the drawings). The third end 3210 of the crotch belt set 3200 is connected to the vehicle body 310, and the fourth end 3220 of the crotch belt set 3200 is detachably connected to the first end 3110 of the shoulder belt set 3100. The fifth end 3310 of the adjustment belt 3300 is connected to the vehicle body 310, and the sixth end of the adjustment belt 3300 is connected to the second end of the shoulder belt set 3100. The adjustment belt 3300 can be switched between a tightened state and a relaxed state. The self-locking mechanism 3400 is arranged between the fifth end 3310 and the sixth end of the adjustment belt 3300. The adjustment belt 3300 passes through the self-locking mechanism 3400 to form a linkage with the self-locking mechanism 3400. When the fourth end 3220 of the crotch strap group 3200 is connected to the first end 3110 of the shoulder strap group 3100 and the adjustment belt 3300 is in a tensioned state, the shoulder strap group 3100 is in a tensioned state, and the self-locking mechanism 3400 locks the adjustment belt 3300 to limit the movement of the adjustment belt 3300 and the shoulder strap group 3100.

[0297] In the above-mentioned safety belt assembly 320, the third end 3210 of the crotch belt set 3200 is connected to the carrier body 310, the fourth end 3220 is connected to the first end 3110 of the shoulder belt set 3100, the second end of the shoulder belt set 3100 is connected to the sixth end of the adjustment belt 3300, and the fifth end 3310 of the shoulder belt set 3100 is connected to the carrier body 310, so as to form a restraining structure that can restrain a child on the carrier body 310. A self-locking mechanism 3400 is provided between the third end 3210 and the fourth end 3220 of the adjustment belt 3300, and the adjustment belt 3300 passes through the self-locking mechanism 3400 and forms a linkage with the self-locking mechanism 3400. When the first end 3110 of the shoulder strap group 3100 is connected to the fourth end 3220 of the crotch strap group 3200 and the adjustment belt 3300 is in a tensioned state, the shoulder strap group 3100 is in a tensioned state, and the self-locking mechanism 3400 can lock the adjustment belt 3300 to limit the movement of the adjustment belt 3300 and the shoulder strap group 3100, so that the shoulder strap group cannot be further tightened, thereby preventing the safety belt assembly 320 from being over-tightened and affecting the riding comfort of the child or causing other safety hazards.

[0298] Specifically, Fig.24As shown, there are two groups of shoulder straps 3100 and they are spaced apart on the left and right sides of the carrier body 310. The two shoulder straps 3100 are used to restrain the shoulders of the child. In this embodiment, each shoulder strap group 3100 includes a shoulder strap body 3120 and a shoulder strap buckle 3130 that are connected to each other, and the shoulder strap buckle 3130 is located at the first end 3110 of the shoulder strap group 3100. There is one group of crotch straps 3200 and the crotch strap group 3200 is used to restrain the crotch of the child. The crotch strap group 3200 includes a crotch strap body 3230 and a crotch strap buckle 3240 that are connected to each other (see Fig.32 , Fig.25 The hip belt buckle 3240 is located at the fourth end 3220 of the hip belt assembly 3200. The shoulder belt buckles 3130 of the two shoulder belt assemblies 3100 can be detachably fastened to the hip belt buckle 3240 to facilitate children to enter and exit the seating space 313. The fifth end 3310 of the adjustment belt 3300 is adjusted by the length adjustment mechanism 3700 (see FIG. Fig.25 ) is fixed to the front end of the seat portion 311 and is located in front of the crotch strap set 3200. The other end of the adjustment strap 3300 passes around the bottom surface of the seat portion 311 and extends to the back surface of the backrest portion 312 to connect with the second ends of the two shoulder strap sets 3100. In this embodiment, the length adjustment mechanism 3700 is switchable between a locked state and an unlocked state. When the length adjustment mechanism 3700 is in the unlocked state, the length of the adjustment strap 3300 can be extended or shortened. When the length adjustment mechanism 3700 is in the locked state, the length of the adjustment strap 3300 can only be shortened.

[0299] It is worth noting that the directional words related to front, back, left, and right mentioned in the context of this application are based on Fig.24 The orientation of the car safety seat shown in the figure is for reference only. Specifically, the direction the child faces after sitting in the car safety seat is the front, the direction the child faces away from is the rear, the left hand side when the reader faces the car safety seat is the left, and the right hand side when the reader faces the car safety seat is the right.

[0300] Optionally, the self-locking mechanism 3400 can have various forms. For example, in the first embodiment, Figure 25 to Figure 29 As shown, the self-locking mechanism 3400 may include a mounting seat 3410, a driving member 3420, a locking member 3430, a fixing frame 3440 and a first restoring member 3451. The crotch belt body 3230 of the crotch belt assembly 3200 in this embodiment is made of a rigid material such as plastic.

[0301] Specifically, Figure 26 to Figure 29As shown, the mounting seat 3410 is fixed to the carrier body 310. A receiving cavity 311a may be provided in the seat portion 311, and the mounting seat 3410 is provided in the receiving cavity 311a. The seat portion 311 is also provided with an opening 111b that can communicate with the receiving cavity 311a. The mounting seat 3410 includes a winding portion 3411 and a mounting portion 3412 that are connected to each other, and the winding portion 3411 is provided on the front side of the mounting portion 3412. An arc-shaped outer wall 34111 and a first limiting rod 34112 spaced apart from the outer wall 34111 are provided on the front side of the winding portion 3411. A first insertion opening 34113 for the adjustment belt 3300 to pass through is formed between the outer wall 34111 and the first limiting rod 34112. The mounting portion 3412 is provided with a first mounting groove 34121 with a notch facing upward. In this embodiment, the first mounting groove 34121 is substantially a rectangular groove.

[0302] Specifically, Figure 27 to Figure 29 As shown, the driving member 3420 is movably disposed in the first mounting groove 34121. The driving member 3420 includes a driving body 3421 and a driving protrusion 3422 that are connected to each other. The driving protrusion 3422 is disposed at the rear side of the driving body 3421 and protrudes from the upper surface of the driving body 3421. The driving body 3421 is provided with a third mounting groove 34211 with a notch facing upward. In this embodiment, the third mounting groove 34211 is roughly a rectangular groove, and the left and right side walls of the third mounting groove 34211 are respectively provided with mounting recesses 34212 that can communicate with the third mounting groove 34211.

[0303] Furthermore, if Figure 27 to Figure 29 As shown, the locking member 3430 is mounted on the driving member 3420. The locking member 3430 is generally U-shaped, and includes a locking body 3431 and mounting protrusions 3432 connected to both ends of the locking body 3431. The locking member 3430 is mounted in the first mounting groove 34121 of the driving member 3420, and the two mounting protrusions 3432 of the locking member 3430 are clamped and fixed in the two mounting recesses 34212 of the driving member 3420. The locking member 3430 moves with the movement of the driving member 3420.

[0304] Furthermore, if Figure 27 to Figure 29As shown, the fixing frame 3440 is fixed to the carrier body 310. Specifically, the fixing frame 3440 is arranged in the accommodating cavity 311a and is fixedly connected to the fixing seat 3800. The fixing frame 3440 includes a frame body 3441 and a first fixing portion 3442 and a second fixing portion 3443 arranged on the frame body 3441. The frame body 3441 is a rectangular frame structure with a rectangular through-groove 34411 in the middle. The left and right sides of the frame body 3441 can be sleeved on the left and right sides of the mounting portion 3412 of the mounting seat 3410, and the through-groove 34411 is opposite to and connected to the notch of the first mounting groove 34121. In other words, the frame body 3441 is covered outside the mounting portion 3412. The left and right sides of the frame body 3441 can be fixed to the two sides of the mounting portion 3412 by two fasteners (such as screws or rivets, etc.) respectively. The front part of the frame body 3441 forms a limit portion 34412. The first fixing parts 3442 are two and are relatively protruded on the upper side of the frame body 3441, and the second fixing part 3443 is one and is arranged on the rear side of the frame body 3441. The fixing frame 3440 can be further fixedly connected to the seat part 311 by setting a fastener penetrating the second fixing part 3443 and the seat part 311.

[0305] Furthermore, if Fig.25 and Fig.26 As shown, the locking member 3430 is in the first position close to the limiting portion 34412 (see Fig.26 ) and a second position away from the limiting portion 34412 (see Fig.25 A pulling gap 3101 is formed between the locking member 3430 and the limiting portion 34412, and the adjusting belt 3300 is at least partially disposed in the pulling gap 3101. When the locking member 3430 moves from the second position to the first position, the pulling gap 3101 becomes smaller to limit the movement of the adjusting belt 3300.

[0306] Furthermore, if Fig.25 and Fig.26 As shown, the crotch belt assembly 3200 is in a tensioned state (see Fig.26 ) and the relaxed state (see Fig.25 When the crotch strap assembly 3200 switches from a relaxed state to a tightened state, the driving member 3420 can be linked to move, so that the driving member 3420 drives the locking member 3430 to move to the first position.

[0307] Furthermore, if Fig.25 and Fig.26As shown, the safety belt assembly 320 further includes a rotating seat 3500. The rotating seat 3500 is rotatably disposed on the carrier body 310 and connected to the third end 3210 of the crotch belt assembly 3200. Specifically, the rotating seat 3500 includes a rotating disk 3510 that is substantially cylindrical and a connecting rod 3520 that is fixed to the outer periphery of the rotating disk 3510. In this embodiment, the seat portion 311 is provided with a fixed seat 3800, and two first fixing portions 3442 of the fixing frame 3440 extend into the fixed seat 3800. The rotating disk 3510 is located between the two first fixing portions 3442, and the rotating disk 3510 is pivotally connected to the two first fixing portions 3442 of the fixing frame 3440 through a pivot shaft 3102 that passes through the central axis thereof, that is, the rotating disk 3510 can rotate relative to the fixing frame 3440. One end of the connecting rod 3520 away from the rotating disk 3510 is connected to the third end 3210 of the crotch belt assembly 3200. In this embodiment, the crotch strap body 3230 can be connected to the connecting rod 3520 by two fasteners such as screws. Fig.26 ) and the second rotation position (see Fig.25 ), the outer periphery of the rotating disk 3510 of the rotating seat 3500 is provided with a pushing protrusion 3511, and the pushing protrusion 3511 is spaced apart from the connecting rod 3520. Its driving member 3420 has a driving protrusion 3422. When the crotch belt assembly 3200 is in a tightened state, the rotating seat 3500 is in a first rotating position, and the pushing protrusion 3511 pushes the driving protrusion 3422 so that the driving member 3420 drives the locking member 3430 to move to the first position; when the crotch belt assembly 3200 is in a relaxed state, the rotating seat 3500 is in a second rotating position, and the pushing protrusion 3511 is spaced apart from the driving protrusion 3422.

[0308] Furthermore, if Figure 27 to Figure 29 As shown, the first reset member 3451 is a spring. The first reset member 3451 is arranged in the first mounting groove 34121 and the two ends of the first reset member 3451 are respectively against the driving member 3420 and the mounting seat 3410. The first reset member 3451 constantly causes the driving member 3420 to drive the locking member 3430 to move to the second position. Specifically, the front side wall of the driving body 3421 is provided with a first sleeve convex 34213, one end of the first reset member 3451 is sleeved on the first sleeve convex 34213 and is against the front side wall of the driving body 3421, and the other end of the first reset member 3451 is against the groove wall of the first mounting groove 34121, so that the first reset member 3451 can be prevented from shifting during the deformation process. In this embodiment, there are two first reset members 3451 and they are spaced apart along the left and right directions of the driving body 3421, so as to provide a more balanced elastic force for the driving member 3420.

[0309] The following specifically describes the winding method of the adjustment belt 3300 in the self-locking mechanism 3400 in this embodiment:

[0310] like Fig.24 and Fig.28 As shown, the fifth end 3310 of the adjustment belt 3300 is fixed to the seat portion 311 through the length adjustment mechanism 3700, and the sixth end of the adjustment belt 3300 extends into the accommodating cavity 311a through the opening 111b, and then enters the first mounting groove 34121, bypasses the locking member 3430, and then extends out of the first mounting groove 34121 through the pulling gap 3101 and bypasses the arc-shaped outer wall 34111 of the winding portion 3411 of the mounting seat 3410, and then extends to the rear of the backrest portion 312 to be connected to the second end of the shoulder strap assembly 3100.

[0311] Thus, when the shoulder strap buckle 3130 and the crotch strap buckle 3240 are not fastened together, or the adjustment strap 3300 is in a loose state, Fig.25 As shown, the rotating seat 3500 is in the second rotating position, the pushing protrusion 3511 and the driving protrusion 3422 are arranged at intervals, and the driving member 3420 drives the locking member 3430 to move to the second position away from the limiting portion 34412 under the elastic force of the first reset member 3451. At this time, the pulling gap 3101 between the locking member 3430 and the limiting portion 34412 is relatively large, and the adjustment belt 3300 arranged between the pulling gap 3101 can move freely. After the child sits on the carrier body 310, the shoulder belt buckle 3130 can be buckled with the crotch belt buckle 3240, and the adjustment belt 3300 can be pulled to a suitable length. When the adjustment belt 3300 is pulled, it will drive the shoulder belt set 3100, and the shoulder belt set 3100 will drive the crotch belt set 3200 buckled therewith, so that the rotating seat 3500 rotates. When the restraint structures connected in sequence by the adjustment belt 3300, the shoulder belt set 3100 and the crotch belt set 3200 are all in a tightened state, the rotating seat 3500 rotates from the second rotating position along the first direction 3D1 to the first rotating position, such as Fig.26 As shown, the pushing protrusion 3511 on the rotating seat 3500 pushes the driving protrusion 3422 on the driving member 3420 along the second direction 3D2, so that the driving member 3420 moves along the second direction 3D2, and drives the locking member 3430 to move to the first position, the pulling gap 3101 becomes smaller, and the adjustment belt 3300 is limited between the limiting portion 34412 and the locking member 3430 and cannot move. At this time, if the adjustment belt 3300 is forcibly tightened, that is, the length of the adjustment belt 3300 is shortened, the pulling gap 3101 will become smaller and smaller, and the adjustment belt 3300 will be further clamped between the limiting portion 34412 and the locking member 3430, so that the user cannot pull the adjustment belt 3300. This prevents the safety belt assembly 320 from being over-tightened, affecting the comfort of the child or causing other safety hazards.

[0312] In the second embodiment, if Figure 30 to Figure 34As shown, the self-locking mechanism 3400 may also include a mounting seat 3410, a driving member 3420, a locking member 3430, a fixing frame 3440, a pushing member 3460, a first restoring member 3451, a second restoring member 3452, a first guide rod 3471, a second guide rod 3472 and a stop pin 3473. The crotch strap body 3230 of the crotch strap assembly 3200 in this embodiment may be made of a rigid material such as rubber, or may be made of a flexible material such as nylon.

[0313] Furthermore, if Figure 32 to Figure 34 As shown, the structures and functional relationships of the mounting seat 3410, the driving member 3420, the locking member 3430 and the first reset member 3451 in this embodiment are basically the same as those in the first embodiment. The structure of the fixing frame 3440 in this embodiment is also basically the same as that of the fixing frame 3440 in the previous embodiment, except that the left and right sides of the frame body 3441 of the fixing frame 3440 in this embodiment are not provided with through holes for fasteners to pass through, but the left and right sides of the frame body 3441 are respectively provided with three through holes for the first guide rod 3471, the second guide rod 3472 and the limit pin 3473 to pass through.

[0314] Furthermore, if Figure 32 to Figure 34 As shown, the safety belt assembly 320 in this embodiment may not include the rotating seat 3500, but the flexible crotch belt body 3230 is directly wound and fixed on a pin 3600 pivotally connected between the two first fixing portions 3442. Of course, the crotch belt body 3230 in this embodiment may also be the same as that in the first embodiment, that is, a hard crotch belt body 3230 rotatably disposed on the seat portion 311 through the rotating seat 3500.

[0315] Furthermore, if Figure 32 to Figure 34As shown, the pusher 3460 is movably disposed in the first mounting groove 34121 of the mounting seat 3410, that is, the pusher 3460 can move relative to the mounting seat 3410 and the fixing frame 3440. In this embodiment, the pusher 3460 includes a pusher portion 3461 and a winding end 3462 connected to each other and a second limit rod 3463 spaced from the winding end 3462. The pusher 3460 can move between a third position and a fourth position relative to the fixing frame 3440, the pusher portion 3461 abuts against the driving member 3420, and the adjustment belt 3300 is at least partially wound around the winding end 3462. The moving directions of the driving member 3420 and the pushing member 3460 are staggered. In this embodiment, the moving direction of the driving member 3420 is along the front-to-back direction of the carrier body 310 (i.e., the first direction 3D1 and the opposite direction thereof), and the moving direction of the pushing member 3460 is along the up-down direction of the carrier body 310 (i.e., the second direction 3D2 and the opposite direction thereof), that is, the moving direction of the driving member 3420 is perpendicular to the moving direction of the pushing member 3460. When the adjustment belt 3300 is switched from the relaxed state to the tightened state, the adjustment belt 3300 pushes the winding end 3462, so that the pushing member 3460 is moved from the fourth position (see Fig.30 ) moves to the third position (see Fig.31 ), and the pushing portion 3461 pushes the driving member 3420 to drive the locking member 3430 to move to the first position.

[0316] Specifically, the driving member 3420 and the pushing member 3460 are arranged along the front-back direction of the carrier body 310, that is, the driving member 3420 is located in the first direction 3D1 of the pushing member 3460. There are two pushing parts 3461 and they are arranged at intervals along the left-right direction of the carrier body 310. The side of the pushing part 3461 facing the driving member 3420 has a pushing inclined surface 34611 and a pushing plane 34612, the pushing inclined surface 34611 is located in the second direction 3D2 of the pushing plane 34612 and the pushing inclined surface 34611 is inclined in the opposite direction of the first direction 3D1 relative to the pushing plane 34612. The side of the driving member 3420 facing the pushing part 3461 is correspondingly provided with a matching inclined surface 34214 and a matching plane 34215, the matching inclined surface 34214 is located in the first direction 3D1 of the matching plane 34215 and the matching inclined surface 34214 is inclined in the first direction 3D1 relative to the matching plane 34215. When the driving member 3420 is at the third position, the pushing inclined surface 34611 abuts against the matching inclined surface 34214 . When the driving member 3420 moves from the third position along the first direction to the fourth position, the pushing plane 34612 abuts against the pushing inclined surface 34611 .

[0317] In this embodiment, Figure 32 to Figure 34As shown, the winding end 3462 has an arc-shaped winding surface 34621, and the first limiting rod 34112 is spaced apart from the winding surface 34621 and is located below the winding surface 34621. A second insertion opening 3464 is formed between the winding surface 34621 and the second limiting rod 3463 for the adjustment belt 3300 to pass through. The left and right sides of the mounting portion 3412 of the mounting seat 3410 are also provided with through holes 34122 that can communicate with the first mounting groove 34121. The pushing member 3460 is a hollow structure as a whole, and a through groove 3465 is provided inside thereof. The through groove 3465 extends from the third position to the fourth position. The limiting pin 3473 passes through the through hole 34122 and the through groove 3465 to limit the moving stroke of the pushing member 3460.

[0318] Furthermore, if Figure 32 to Figure 34 As shown, the second resetting member 3452 constantly moves the pushing member 3460 to the fourth position. Specifically, the pushing member 3460 is provided with a second mounting groove 3466, and the second resetting member 3452 is arranged in the second mounting groove 3466. In this embodiment, the second mounting groove 3466 is located between the two pushing portions 3461 and is connected to the through groove 3465. The second mounting groove 3466 is arranged roughly along the up and down direction of the carrier body 310, that is, the second direction 3D2. The bottom of the second mounting groove 3466 is provided with a second sleeve convex 3467, one end of the second resetting member 3452 is sleeved on the second sleeve convex 3467, and is abutted against the bottom of the second mounting groove 3466, and the other end of the second resetting member 3452 is abutted against the fixing frame 3440.

[0319] Furthermore, if Figure 32 to Figure 34 As shown, the first guide rod 3471 and the second guide rod 3472 are respectively located on both sides of the pusher 3460. Specifically, the first guide rod 3471 and the second guide rod 3472 extend substantially along the left-right direction of the carrier body 310, that is, the third direction 3D3, and the first guide rod 3471 and the second guide rod 3472 are spaced apart along the first direction 3D1, the pusher 3460 is located between the first guide rod 3471 and the second guide rod 3472, and the first guide rod 3471 and the second guide rod 3472 are disposed above the lowest point of the winding end 3462 of the pusher 3460. The first guide rod 3471 and the second guide rod 3472 can be respectively fixed to the fixing frame 3440 through the through holes on the left and right sides of the frame body 3441, and the first guide rod 3471 and the second guide rod 3472 are both located below the mounting seat 3410.

[0320] The following describes in detail the winding method of the adjustment belt 3300 in the self-locking mechanism 3400:

[0321] like Figure 30 to Figure 32As shown, the fifth end 3310 of the adjustment belt 3300 is fixed to the seat portion 311 through the length adjustment mechanism 3700, and the sixth end of the adjustment belt 3300 extends into the accommodating cavity 311a through the opening 111b, and then enters the first installation groove 34121, passes through the locking member 3430, and then extends out of the first installation groove 34121 through the pulling gap 3101 and bypasses the arc-shaped outer wall 34111 of the winding portion 3411 of the mounting seat 3410, and then passes through the The arc-shaped winding surface 34621 of the winding end 3462 of the pushing member 3460 passes through the gap between the first guide rod 3471 and the bottom of the mounting seat 3410, and after passing through the second penetration opening 3464 between the winding surface 34621 and the second limiting rod 3463, it passes through the gap between the second guide rod 3472 and the bottom of the mounting seat 3410 and extends to the rear of the backrest portion 312 to be connected with the second end of the shoulder strap assembly 3100.

[0322] Thus, when the shoulder strap buckle 3130 and the crotch strap buckle 3240 are not fastened together, or the adjustment strap 3300 is in a loose state, Fig.30 As shown, the adjustment belt 3300 does not press the push member 3460, and the push member 3460 is in the fourth position under the elastic force of the second reset member 3452, and the push inclined surface 34611 of the push member 3460 is against the matching inclined surface 34214 of the driving member 3420. As mentioned above, since the push inclined surface 34611 is located in the second direction 3D2 of the push plane 34612 and the push inclined surface 34611 is inclined in the opposite direction of the first direction 3D1 relative to the push plane 34612, the driving member 3420 is in the second position relatively backward under the elastic force of the first reset member 3451. At this time, the pulling gap 3101 between the locking member 3430 and the limiting portion 34412 is large, and the adjustment belt 3300 arranged between the pulling gap 3101 can move freely.

[0323] When the child sits on the carrier body 310, the shoulder strap buckle 3130 and the hip strap buckle 3240 can be fastened, and the adjustment strap 3300 can be pulled to an appropriate length. When the adjustment strap 3300 is pulled, it will press against the winding end 3462 of the pushing member 3460, causing the pushing member 3460 to move in the second direction 3D2, so that the pushing inclined surface 34611 gradually moves upward and disengages from the matching inclined surface 34214, and then the pushing plane 34612 pushes against the matching inclined surface 34214 until it disengages from the matching inclined surface 34214 and abuts against the matching plane 34215, and in this process, the second restoring member 3452 is compressed and deformed. As mentioned above, the matching bevel 34214 is located in the first direction 3D1 of the matching plane 34215 and the matching bevel 34214 is inclined relative to the matching plane 34215 in the first direction 3D1, so it is equivalent to that the pushing member 3460 pushes the driving member 3420 to the first position in the first direction 3D1, and the first reset member 3451 is compressed and deformed. The pulling gap 3101 becomes smaller, and the adjustment belt 3300 is restricted between the limit portion 34412 and the locking member 3430 and cannot move. At this time, if the adjustment belt 3300 is forcibly tightened, that is, the length of the adjustment belt 3300 is shortened, the pulling gap 3101 will become smaller and smaller, and the adjustment belt 3300 will be further clamped between the limit portion 34412 and the locking member 3430, so that the user cannot pull the adjustment belt 3300. Thereby preventing the safety belt assembly 320 from being over-tightened and affecting the comfort of the child or causing other safety hazards.

[0324] The safety belt assembly 320 and the child carrier have at least the following technical effects:

[0325] In the above-mentioned safety belt assembly 320, the third end 3210 of the crotch belt set 3200 is connected to the carrier body 310, the fourth end 3220 is connected to the first end 3110 of the shoulder belt set 3100, the second end of the shoulder belt set 3100 is connected to the sixth end of the adjustment belt 3300, and the fifth end 3310 of the shoulder belt set 3100 is connected to the carrier body 310, so as to form a restraining structure that can restrain a child on the carrier body 310. A self-locking mechanism 3400 is provided between the third end 3210 and the fourth end 3220 of the adjustment belt 3300, and the adjustment belt 3300 passes through the self-locking mechanism 3400 and forms a linkage with the self-locking mechanism 3400. When the first end 3110 of the shoulder strap assembly 3100 is connected to the fourth end 3220 of the crotch strap assembly 3200 and the adjustment belt 3300 is in a tensioned state, the self-locking mechanism 3400 can lock the adjustment belt 3300 to limit the movement of the adjustment belt 3300, thereby preventing the safety belt assembly 320 from being over-tightened and affecting the riding comfort of the child or causing other safety hazards.

[0326] Since the present application can be implemented in various forms without departing from the spirit and essence of the present application, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be interpreted in the broadest scope within the scope defined by the claims. Therefore, all changes that fall within the scope of the claims or their equivalents should be covered by the claims.

Claims

1. A safety belt assembly for a child carrier, the child carrier also comprising a carrier body, characterized in that: include: a shoulder strap assembly having a first end and a second end; A crotch strap assembly, having a third end and a fourth end, wherein the third end is connected to the carrier body, and the fourth end is detachably connected to the first end; an adjustment belt having a fifth end and a sixth end, wherein the fifth end is connected to the carrier body, the sixth end is connected to the second end, and the adjustment belt is switchable between a tightened state and a loosened state; and A self-locking mechanism, disposed between the fifth end and the sixth end; Among them, the adjustment belt passes through the self-locking mechanism to form a linkage with the self-locking mechanism, when the fourth end is connected to the first end and the adjustment belt is in a tensioned state, the shoulder strap group is in a tensioned state, and the self-locking mechanism locks the adjustment belt to limit the movement of the adjustment belt and the shoulder strap group.

2. The seat belt assembly according to claim 1, characterized in that: The self-locking mechanism comprises: A limiting portion, fixed to the carrier body; and a locking member movable between a first position close to the limiting portion and a second position away from the limiting portion; A pulling gap is formed between the locking member and the limiting portion, and the adjusting belt is at least partially disposed in the pulling gap. Wherein, when the crotch belt assembly switches from a relaxed state to a tightened state, it can drive the driving member to move, so that the driving member drives the locking member to move to the first position.

3. The seat belt assembly according to claim 2, characterized in that: The crotch belt assembly is switchable between a tightened state and a loose state; The driving member can move relative to the limiting portion and is drivingly connected to the crotch belt assembly, and the locking member is installed on the driving member.

4. The seat belt assembly according to claim 2, characterized in that: Also includes: A rotating seat, rotatably disposed on the carrier body and connected to the third end, wherein the rotating seat is rotatable between a first rotating position and a second rotating position; Wherein, when the crotch belt assembly is in a tightened state, the rotating seat is in the first rotating position to drive the locking member to move to the first position.

5. The seat belt assembly according to claim 2, characterized in that: The self-locking mechanism also includes: A pusher, movable between a third position and a fourth position, wherein the pusher has a winding end, and the adjustment belt is at least partially wound around the winding end; Wherein, the moving directions of the locking member and the pushing member are staggered. When the adjustment belt switches from the relaxed state to the tightened state, the adjustment belt pushes the winding end, so that the pushing member moves from the fourth position to the third position, and drives the locking member to move to the first position.

6. The seat belt assembly according to claim 2, characterized in that: The self-locking mechanism also includes: A driving member, movable relative to the limiting portion, wherein the locking member is mounted on the driving member; and A pushing member, movable between a third position and a fourth position relative to the carrier body, the pushing member having a pushing portion, the pushing portion abutting against the driving member; Wherein, the pushing member moves from the fourth position to the third position, and the pushing portion pushes the driving member to drive the locking member to move to the first position.

7. The safety belt assembly according to claim 5 or 6, characterized in that: The self-locking mechanism also includes: a first restoring member biasing the driving member to drive the locking member to move toward the second position, and The second reset member biases the pushing member to move toward the fourth position.

8. The seat belt assembly according to claim 5, characterized in that: Also includes: A mounting seat, fixed to the carrier body and having a first mounting groove; In which, the locking member is arranged in the first mounting groove, and the sixth end bypasses the locking member and passes through the first mounting groove through the pulling gap, and then bypasses the winding end after passing the outer wall of the mounting seat to connect with the second end, and the self-locking mechanism also includes a first guide rod and a second guide rod fixed to the carrier body, and the first guide rod and the second guide rod are respectively located on both sides of the pushing member, and the sixth end bypasses the outer wall of the mounting seat and then bypasses the winding end through the first guide rod, and then bypasses the second guide rod to connect with the second end.

9. The safety belt assembly according to claim 5, characterized in that: The self-locking mechanism also includes: Limit pins; and A mounting seat, fixed to the carrier body and having a first mounting groove, the mounting seat also having a through hole capable of communicating with the first mounting groove; Wherein, the pushing member is at least partially located in the first mounting groove, and the pushing member is provided with a through groove, the through groove extends along the direction from the third position to the fourth position, and the limit pin passes through the through hole and the through groove to limit the moving stroke of the pushing member.

10. A child carrier, comprising a carrier body and a safety belt assembly, characterized in that: The seat belt assembly comprises: a shoulder strap assembly having a first end and a second end; A crotch strap assembly, having a third end and a fourth end, wherein the third end is connected to the carrier body, and the fourth end is detachably connected to the first end; an adjustment belt having a fifth end and a sixth end, wherein the fifth end is connected to the carrier body, and the sixth end is connected to the second end; and A self-locking mechanism, disposed between the fifth end and the sixth end; Wherein, the self-locking mechanism comprises: A limiting part, fixed to the carrier body; A driving member, movable relative to the limiting portion and drivingly connected to the crotch belt assembly; and a locking member movable between a first position close to the limiting portion and a second position away from the limiting portion; A pulling gap is formed between the locking member and the limiting portion, and the adjusting belt is at least partially disposed in the pulling gap. When the fourth end of the crotch belt assembly is connected to the first end of the shoulder belt assembly, the driving member drives the locking member to move toward the first position to limit the movement of the adjustment belt.

11. The child carrier according to claim 10, characterized in that: The safety belt assembly further includes a length adjustment mechanism, and the fifth end of the adjustment belt is fixed to the front end of the carrier body through the length adjustment mechanism; The length adjustment mechanism can be switched between a locked state and a released state. When the length adjustment mechanism is in the released state, the length of the adjustment belt can be adjusted to be extended or shortened; when the length adjustment mechanism is in the locked state, the length of the adjustment belt can be adjusted to be shortened.

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