Safety belt length adjustment device for child safety seat and child safety seat

Abstract

A safety belt length adjustment device of a child safety seat and a child safety seat, wherein the safety belt length adjustment device of the child safety seat comprises: an adjustment belt having a connection section located inside the child safety seat and an adjustment section extending out of the child safety seat, the connection section being connected to a safety belt; a locking member arranged on the child safety seat and sleeved on the adjustment section of the adjustment belt to operatively lock the adjustment belt; and vertical rollers located on the sides of the adjustment section of the adjustment belt in the width direction, wherein the vertical rollers comprise a first vertical roller and a second vertical roller, the first vertical roller and the second vertical roller are respectively located on the two sides of the adjustment belt in the width direction, and the distance between the first vertical roller and the second vertical roller is greater than the width of the adjustment belt.

Description

[0001] This application is a divisional application of the application filed by Mingmen (China) Children's Products Co., Ltd., filed on November 21, 2024, with application number 2024228553122 and invention title "Seatbelt Assembly and Child Vehicle". Technical Field

[0002] This disclosure relates to a seat belt assembly and a child vehicle incorporating the seat belt assembly. Background Technology

[0003] A child safety seat is a seat designed specifically for children of different weights (or ages) and installed in a car to effectively improve children's safety while traveling. A child safety seat is a car accessory that is fixed to the car seat and provides restraint and protection. It is primarily used for young children and is designed to restrain them in the event of an accidental impact to ensure their safety.

[0004] Currently, child vehicles, such as child safety seats, are generally equipped with seat belts. After a child is seated in the vehicle, the seat belt secures the child to ensure travel safety. However, existing seat belts often fail to lock after being fully tightened, allowing them to continue tightening. This can result in the child being excessively constricted, affecting their comfort. Furthermore, in the event of a collision, an over-tightened seat belt can potentially cause secondary injuries to the child. Utility Model Content

[0005] Therefore, this disclosure provides a seat belt length adjustment device for a child safety seat, comprising: an adjustment belt having a connecting section located inside the child safety seat and an adjustment section extending from outside the child safety seat, the connecting section being connected to the seat belt; a locking member disposed on the child safety seat and fitted onto the adjustment section of the adjustment belt to operably lock the adjustment belt; and a vertical roller located on the side of the adjustment section of the adjustment belt in the width direction, wherein the vertical roller includes a first vertical roller and a second vertical roller, the first vertical roller and the second vertical roller being located on opposite sides of the adjustment belt in the width direction, and the distance between the first vertical roller and the second vertical roller being greater than the width of the adjustment belt.

[0006] According to one embodiment, the vertical roller is closer to the end of the adjusting section than the locking member.

[0007] This disclosure also provides a child safety seat, comprising: a seat having an opening, the opening including a bottom wall and a side wall perpendicular to the bottom wall; a seat belt; and a seat belt length adjustment device disposed at the opening, wherein the seat belt length adjustment device includes: an adjustment band having a connecting section located inside the seat and an adjustment section located outside the seat, the connecting section connecting the seat belt, the adjustment section extending out of the seat from the opening, the edge of the adjustment section opposite to the side wall of the opening; and a vertical roller located between the side wall and the adjustment band.

[0008] According to one embodiment, 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 adjusting belt, and the distance between the first vertical roller and the second vertical roller is greater than the width of the adjusting belt.

[0009] According to one embodiment, the seat belt length adjustment device further includes a locking member disposed at the opening and fitted onto the adjustment section of the adjustment belt, thereby operably locking the adjustment belt; wherein the vertical roller is closer to the end of the adjustment section than the locking member.

[0010] According to one embodiment, the locking member includes: a fixing seat fixed at the opening of the seat portion; and a locking block pivotally connected to the fixing seat, the locking block having a release portion for unlocking; wherein, when the locking member locks the adjusting band, the adjusting band is clamped between the fixing seat and the locking block.

[0011] According to one embodiment, the seat belt length adjustment device further includes a cover; the cover is fixed at the opening to cover the vertical roller; the cover and the opening are configured to form an adjustment belt hole and a release hole; the adjustment belt hole and the release hole are spaced apart, the adjustment section passes through the adjustment belt hole, and the release section is exposed outside the cover through the release hole.

[0012] According to one embodiment, the cover includes an outlet portion and a covering portion connected to the outlet portion, the height of the outlet portion being 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 a clearance space for the pivoting movement of the locking block.

[0013] According to one embodiment, the vertical roller is pivotally connected to at least one of the seat and the cover by vertical rivets.

[0014] According to one embodiment, the seat belt length adjustment device further 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 member, and the projection of the transverse roller on the side wall coincides with the projection of the vertical roller on the side wall; the length of the transverse roller is less than the distance between the rotation axis of the first vertical roller and the rotation axis of the second vertical roller.

[0015] Furthermore, according to another first aspect of this disclosure, a seat belt length adjustment device for a child safety seat is provided, comprising: an adjustment belt having a connecting section located inside the child safety seat and an adjustment section extending from outside the child safety seat, the connecting section being connected to the seat belt; a locking member disposed on the child safety seat and fitted onto the adjustment section of the adjustment belt to operably lock the adjustment belt; and a vertical roller 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 member.

[0016] According to one embodiment of the present disclosure, the vertical roller includes a first vertical roller and a second vertical roller, which are located on both sides of the width direction of the adjusting belt, and the distance between the first vertical roller and the second vertical roller is greater than the width of the adjusting belt.

[0017] According to this disclosure, a child safety seat is also provided, comprising: a seat having an opening, the opening including a bottom wall and a side wall perpendicular to the bottom wall; a seat belt; and a seat belt length adjustment device disposed at the opening, wherein the seat belt length adjustment device includes: an adjustment belt having a connecting section located inside the seat and an adjustment section located outside the seat, the connecting section being connected to the seat belt, the adjustment section extending out of the seat from the opening, and the edge of the adjustment section being opposite to the side wall of the opening; and a vertical roller located between the side wall and the adjustment belt.

[0018] According to one embodiment of the present disclosure, the vertical roller includes a first vertical roller and a second vertical roller, which are located on both sides of the width direction of the adjusting belt, and the distance between the first vertical roller and the second vertical roller is greater than the width of the adjusting belt.

[0019] According to one embodiment of the present disclosure, the seat belt length adjustment device further includes a locking member disposed at the opening and fitted onto the adjustment section of the adjustment belt, thereby operably locking the adjustment belt; wherein, the vertical roller is closer to the end of the adjustment section than the locking member.

[0020] According to one embodiment of the present disclosure, the locking member includes: a fixed seat fixed at an opening of the seat portion; and a locking block pivotally connected to the fixed seat, the locking block having a release portion for unlocking; wherein, when the locking member locks the adjustment band, the adjustment band is clamped between the fixed seat and the locking block.

[0021] According to one embodiment of the present disclosure, the seat belt length adjustment device further includes a cover; the cover is fixed at the opening to cover the vertical roller; the cover and the opening are configured to form an adjustment belt hole and a release hole; the adjustment belt hole and the release hole are spaced apart, the adjustment section passes through the adjustment belt hole, and the release section is exposed outside the cover through the release hole.

[0022] According to one embodiment of the present disclosure, the cover includes an outlet portion and a covering portion connected to the outlet portion, the height of the outlet portion being lower than the height of the covering portion; the outlet portion covers a vertical roller, and the covering portion partially covers a locking block; the covering portion forms a clearance space for the pivoting movement of the locking block.

[0023] According to one embodiment of this disclosure, the vertical roller is pivotally connected to at least one of the seat and the cover by vertical rivets.

[0024] According to one embodiment of this disclosure, the seat belt length adjustment device further 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 member, and the projection of the transverse roller on the side wall partially coincides with the projection of the vertical roller on the side wall; the length of the transverse roller is less than the distance between the rotation axis of the first vertical roller and the rotation axis of the second vertical roller.

[0025] According to a second aspect of this disclosure, a child safety seat is provided, comprising: a seat body; a seat belt buffer mechanism disposed inside the seat body; and a seat belt assembly including a fixed end fixed to the seat body and a free end, the free end passing through the seat belt buffer mechanism, wherein the seat belt buffer mechanism includes: a fixing frame fixedly connected to the seat body; a buffer member movably disposed at the fixing frame and having a first position and a second position, the seat belt assembly being configured to partially surround the buffer member; an elastic member disposed between the fixing frame and the buffer member, or between the seat body and the buffer member, and biasing the buffer member in the direction of the first position; and a guide member disposed at the fixing frame for guiding the direction of the seat belt assembly passing through the seat belt buffer mechanism.

[0026] According to one embodiment, when the buffer is in 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 in the second position.

[0027] According to one embodiment, the seat body includes a backrest and a seat, a seat belt buffer mechanism is disposed in the seat, and the seat body also includes a seat belt length adjustment structure disposed in the seat, wherein the free end of the seat belt assembly is operably locked to the seat belt length adjustment structure.

[0028] According to one embodiment, the seat belt assembly includes two shoulder straps and one adjustment strap, the adjustment strap being threaded through the seat belt buffer mechanism, with one end of each shoulder strap fixed to the seat body and the other end connected to the adjustment strap inside the seat body.

[0029] According to one embodiment, the fixed 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 limiting pin, which slides in the buffer groove and supports the displacement of the buffer member.

[0030] According to one embodiment, the buffer groove is perpendicular to the adjustment belt and is used to buffer the force on the adjustment belt from the vertical direction.

[0031] According to one embodiment, the guide is configured as two guide rods located on both sides of the buffer along the direction of the adjustment belt. The guide rods are rotatably supported in a fixed frame and are used to guide the adjustment belt. The guide rods are configured such that the direction in which the adjustment belt enters the seat belt buffer mechanism is parallel to the direction in which it exits the seat belt buffer mechanism.

[0032] According to one embodiment, the elastic element is a compression spring or a tension spring.

[0033] According to one embodiment, the buffer is configured in an arc shape on the side facing the adjustment belt, having a width corresponding to the width of the adjustment belt, and abuts against the elastic member on the other side away from the adjustment belt.

[0034] According to one embodiment, the fixing frame has an upper wall and two side walls perpendicular to the upper wall. The side walls are configured as an inverted trident shape. The middle part of the trident shape is configured as a buffer support. The buffer support has a buffer groove for pivotally supporting the buffer. The two sides of the trident shape are respectively configured as guide rod supports for pivotally supporting the guide rod.

[0035] According to one embodiment, the buffer groove is parallel to the adjustment belt and is used to buffer the force on the adjustment belt in the horizontal direction.

[0036] According to one embodiment, the guide is configured as a guide rod, which is rotatably supported in a fixed frame and used to change the direction of movement of the adjusting belt.

[0037] According to one embodiment, the seatbelt buffer mechanism includes a retaining pin, wherein...

[0038] The buffer element is set as a buffer rod and the elastic element is a tension spring, with the two ends of the tension spring fixed to the fixing pin and the buffer rod respectively.

[0039] According to one embodiment, the fixing frame has an upper wall and two side walls perpendicular to the upper wall. A fixing pin support is provided on one side of the side wall for pivotally supporting the fixing pin. The fixing pin support causes the side wall to form a notch. The edges of the notch are respectively attached to the bottom wall and the rear wall of the opening of the seat body. A buffer groove and a through hole for inserting a 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.

[0040] According to one embodiment, the pin head of the fixing pin and the rod head of the buffer rod extend from both sides of the side wall of the fixing frame to fix a tension spring on each of the two outer sides of the fixing frame.

[0041] According to one embodiment, the backrest is provided with a reinforcing bar, and each shoulder strap is configured to pass over the reinforcing bar from the upper part of the backrest and connect to an adjustment strap.

[0042] According to one embodiment, the guide is positioned between a first position and a second position in the extending direction of the seat belt assembly, wherein the contact length between the seat belt assembly and the buffer when the buffer is in the first position is greater than twice the contact length between the seat belt assembly and the buffer when the buffer is in the second position.

[0043] Based on this, according to the third aspect of this disclosure, it is necessary to provide a seat belt assembly and a child vehicle, which can automatically lock after being tightened to the full tension, thereby preventing the seat belt assembly from being over-tightened.

[0044] This disclosure provides, in one aspect, a seatbelt assembly for use in a child vehicle, the child vehicle also including a vehicle body, comprising:

[0045] The shoulder strap assembly has a first end and a second end;

[0046] The crotch strap assembly has a third end and a fourth end, the third end being connected to the vehicle body, and the fourth end being detachably connected to the first end;

[0047] An adjusting belt has a fifth end and a sixth end, the fifth end being connected to the vehicle body, and the sixth end being connected to the second end, and the adjusting belt is switchable between a tensioned state and a slack state; and

[0048] A self-locking mechanism is located between the fifth end and the sixth end;

[0049] The adjustment strap 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 strap is in a taut state, the shoulder strap assembly is in a taut and fully engaged state. The self-locking mechanism locks the adjustment strap to restrict the movement of the adjustment strap and the shoulder strap assembly.

[0050] In the aforementioned seatbelt assembly, the third end of the crotch strap is connected to the vehicle body, the fourth end is connected to the first end of the shoulder strap assembly, the second end of the shoulder strap assembly is connected to the sixth end of the adjustment strap, and the fifth end of the shoulder strap assembly is connected to the vehicle body. This forms a restraint structure that can secure the child to the vehicle body. A self-locking mechanism is provided between the third and fourth ends of the adjustment strap, and the adjustment strap passes through and is linked to the self-locking mechanism. When the first end of the shoulder strap assembly is connected to the fourth end of the crotch strap assembly and the adjustment strap is in a taut state, the shoulder strap assembly is also in a taut state. The self-locking mechanism can lock the adjustment strap to restrict the movement of the adjustment strap and the shoulder strap assembly, preventing the shoulder strap assembly from being further tightened. This avoids the seatbelt assembly being over-tightened, which could affect the child's riding comfort or cause other safety hazards.

[0051] In one embodiment, the self-locking mechanism includes: a pull gap, wherein the adjusting band is at least partially disposed within the pull gap, and when the fourth end is connected to the first end and the adjusting band is in a taut state, the pull gap decreases to restrict the movement of the adjusting band.

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

[0053] The limiting part is fixed to the vehicle body; and

[0054] The locking element is movable between a first position close to the limiting portion and a second position away from the limiting portion;

[0055] A pulling gap is formed between the locking member and the limiting part, and the adjusting band is at least partially disposed within the pulling gap.

[0056] In one embodiment, the crotch strap assembly is switchable between a tensioned state and a relaxed state; when the crotch strap assembly switches from a relaxed state to a tensioned state, it can move the locking member from the second position to the first position.

[0057] In one embodiment, the crotch strap assembly is switchable between a tensioned state and a relaxed state; the self-locking mechanism further includes:

[0058] The driving component is movable relative to the limiting part and is drivenly connected to the crotch belt assembly; the locking component is mounted on the driving component.

[0059] When the hip belt assembly switches from a relaxed state to a tightened state, it can move in conjunction with the drive component, causing the drive component to move the locking component to the first position.

[0060] In one embodiment, the seatbelt assembly further includes:

[0061] A rotating seat is rotatably mounted on the carrier body and connected to the third end. The rotating seat can rotate between a first rotating position and a second rotating position.

[0062] When the hip belt assembly is in a taut state, the rotating seat is in the first rotating position, thereby driving the locking member to move to the first position.

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

[0064] The first reset member biases the driving member, causing the locking member to move to the second position.

[0065] In one embodiment, the self-locking mechanism further includes:

[0066] A pusher is movable between a third position and a fourth position, the pusher having a winding end, and the adjusting belt being at least partially wound around the winding end;

[0067] The moving directions of the locking member and the pushing member are intersecting. When the adjusting belt switches from the slack state to the tension state, the adjusting belt pushes the winding end, causing the pushing member to move from the fourth position to the third position, and driving the locking member to move to the first position.

[0068] In one embodiment, the self-locking mechanism further includes:

[0069] The driving member is movable relative to the limiting portion, and the locking member is mounted on the driving member; and

[0070] The pusher is movable relative to the vehicle body between a third position and a fourth position, and the pusher has a pushing part that abuts against the drive member;

[0071] The pusher moves from the fourth position to the third position, and the pusher pushes the drive to move the locking member to the first position.

[0072] In one embodiment, the self-locking mechanism further includes:

[0073] The first reset member biases the driving member, causing the locking member to move to the second position.

[0074] In one embodiment, the self-locking mechanism further includes:

[0075] The second reset member biases the pusher member to move to the fourth position.

[0076] In one embodiment, the seatbelt assembly further includes:

[0077] The mounting base is fixed to the vehicle body and has a first mounting groove;

[0078] The locking element is located in the first mounting groove. The sixth end passes through the locking element, exits the first mounting groove through the pulling gap, passes through the outer wall of the mounting base, and then passes around the bypassing end to connect with the second end.

[0079] In one embodiment, the self-locking mechanism further includes a first guide rod and a second guide rod fixed to the vehicle body. The first guide rod and the second guide rod are respectively located on both sides of the pusher. The sixth end passes around the outer wall of the mounting base, passes around the bypass end via the first guide rod, and then passes around the second guide rod to connect with the second end.

[0080] In one embodiment, the self-locking mechanism further includes:

[0081] Limit pin; and

[0082] The mounting base is fixed to the vehicle body and has a first mounting groove. The mounting base also has a through hole that can communicate with the first mounting groove.

[0083] The pusher is at least partially located within the first mounting groove, and the pusher is provided with a through groove that extends along the direction from the third position to the fourth position. The limiting pin passes through the through hole and the through groove to limit the movement stroke of the pusher.

[0084] This disclosure also proposes a child vehicle, including a vehicle body and a seat belt assembly as described in any of the preceding claims. Attached Figure Description

[0085] Figure 1 A perspective view and a partial enlarged view of a child safety seat according to the first aspect of this disclosure are shown;

[0086] Figure 2 A perspective view and a partial enlarged view of a child safety seat according to an embodiment of the first aspect of the present disclosure are shown;

[0087] Figure 3 A perspective view of a cover according to an embodiment of the first aspect of this disclosure is shown;

[0088] Figure 4 A perspective view and a partial enlarged view of a child safety seat according to an embodiment of the first aspect of the present disclosure are shown;

[0089] Figure 5 A side cross-sectional view of a seat belt length adjustment structure according to an embodiment of the first aspect of this disclosure is shown;

[0090] Figure 6 A perspective view and a partial enlarged view of a child safety seat according to another embodiment of the first aspect of this disclosure are shown, including the seat belt length; and

[0091] Figure 7 A side cross-sectional view of a seatbelt length adjustment structure according to another embodiment of the present disclosure is shown.

[0092] Figure 8 A perspective view of a child safety seat according to an embodiment of the second aspect of this disclosure is shown;

[0093] Figure 9A A cross-sectional perspective view and a partial enlarged view of a child safety seat according to an embodiment of the second aspect of this disclosure are shown;

[0094] Figure 9B A cross-sectional perspective view and a partial enlarged view of a child safety seat according to an embodiment of the second aspect of this disclosure are shown;

[0095] Figure 10 A cross-sectional side view and a partial enlarged view of a child safety seat according to an embodiment of the second aspect of this disclosure are shown;

[0096] Figure 11 A cross-sectional view and a partial enlarged view of a child safety seat according to an embodiment of the second aspect of this disclosure are shown;

[0097] Figure 12 A cross-sectional view and a partial enlarged view of a child safety seat according to an embodiment of the second aspect of this disclosure are shown;

[0098] Figure 13 A seatbelt buffer mechanism according to an embodiment of the second aspect of this disclosure is shown;

[0099] Figure 14 A seatbelt buffer mechanism according to an embodiment of the second aspect of this disclosure is shown;

[0100] Figure 15 An exploded view and a partial enlarged view of a child safety seat according to an embodiment of the second aspect of this disclosure are shown;

[0101] Figure 16 A lower perspective view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of this disclosure are shown;

[0102] Figure 17 A lower perspective view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of this disclosure are shown;

[0103] Figure 18 A cross-sectional view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of this disclosure are shown;

[0104] Figure 19 A lower perspective view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of this disclosure are shown;

[0105] Figure 20 A cross-sectional view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of this disclosure are shown;

[0106] Figure 21 This illustrates a seatbelt buffer mechanism according to another embodiment of the second aspect of this disclosure;

[0107] Figure 22 A seatbelt buffer mechanism according to another embodiment of the second aspect of this disclosure is shown; and

[0108] Figure 23 A lower perspective view and a partial enlarged view of a child safety seat according to another embodiment of the second aspect of this disclosure are shown.

[0109] Figure 24 This is a schematic diagram of the structure of the child vehicle described in the first embodiment of the third aspect of this application;

[0110] Figure 25 for Figure 24 The 3A-3A sectional view and the enlarged view of the part circled in dashed circles, at this time the adjustment belt is in a relaxed state;

[0111] Figure 26 for Figure 24 Another 3A-3A sectional view and an enlarged view of the part circled in dashed circles, at which point the adjusting belt is in a taut state;

[0112] Figure 27 for Figure 24 Schematic diagram of the adjustment belt and self-locking mechanism in a child vehicle.

[0113] Figure 28 for Figure 27 Sectional view 3B-3B;

[0114] Figure 29 for Figure 27 Exploded view;

[0115] Figure 30 This is a cross-sectional view of a child vehicle according to another embodiment of the third aspect of this application and an enlarged view of the portion circled in dashed lines, in which the adjustment belt is in a relaxed state;

[0116] Figure 31 for Figure 30 Another sectional view of the child vehicle shown and an enlarged view of the portion circled in dashed lines, with the adjustment belt in a taut state;

[0117] Figure 32 for Figure 30 A schematic diagram of the shoulder strap buckle, crotch strap assembly, and self-locking mechanism in the child vehicle shown;

[0118] Figure 33 for Figure 32 3C-3C sectional view;

[0119] Figure 34 for Figure 32 Exploded view.

[0120] List of reference numerals

[0121] 11A, 11 child safety seats

[0122] 1100A, 1100 seat belt length adjustment structure; 1110A, 1110 locking block

[0123] 1111 Locking Part

[0124] 1112 Release Lock Section

[0125] 1113 Pivot Shaft

[0126] 1120A, 1120 mounting base

[0127] 1121A, 1121 Fixing Holes

[0128] 1122A, 1122 Export

[0129] 1123A, 1123 support

[0130] 1130 cover

[0131] 1131 Covering Section

[0132] 11311 Covering part upper wall

[0133] 11312 Covered sidewall

[0134] 1132 Export Department

[0135] 11321 Export Department Upper Wall

[0136] 11322 Exit Side Wall

[0137] 1133 perforation

[0138] 1134 concave part

[0139] 1135 perforation

[0140] 1136 Connecting convex

[0141] 1137 gap

[0142] 1138 Rear Wall

[0143] 1200A, 1200 seat

[0144] 1210A, 1210 opening

[0145] 1211 connecting slot

[0146] 1212 bottom wall

[0147] 1213 Rear Wall

[0148] 1214 sidewall

[0149] 1300A, 1300 backrest

[0150] 1400A, 1400 headrest

[0151] 1500A, 1500 flank

[0152] 1600A, 1600 seat belt assembly

[0153] 1610A, 1610 shoulder strap

[0154] 1620A, 1620 belt

[0155] 1630A, 1630 Adjustment Belt

[0156] 1631 Adjustment Section

[0157] 1632 connecting section

[0158] 1700 fasteners

[0159] 1710 connecting belt

[0160] 1810 Vertical Roller

[0161] 1811 vertical rivets

[0162] 1820 Horizontal Roller

[0163] 1821 Horizontal Rivet 12A Base

[0164] 1A-1A Section Line

[0165] 21 Seat body

[0166] 2100 Seatbelt length adjustment structure; 2110 Locking block.

[0167] 2120 Fixture

[0168] 2130 cover

[0169] 2200 Seating Section

[0170] 2210 Opening

[0171] 2212 bottom wall

[0172] 2213 Rear Wall

[0173] 2214 sidewall

[0174] 2215 Adjustment with entrance

[0175] 2216 Adjustment with outlet 2220 Installation section

[0176] 2221 mounting hole

[0177] 2300 Backrest

[0178] 2310 Reinforcing Rod

[0179] 2400 headrest

[0180] 2500 flank

[0181] 2600 Seatbelt Assembly

[0182] 2610 shoulder strap

[0183] 2630 Adjustment Belt

[0184] 2631 bending section

[0185] 2640 connector

[0186] 2700 fastener

[0187] 2710 connecting belt

[0188] 2800 seat belt buffer mechanism

[0189] 2810 mounting bracket

[0190] 2811 on the wall

[0191] 2812 sidewall

[0192] 2813 fixing hole

[0193] 2814 Buffer Support

[0194] 2815 guide rod support

[0195] 2816 buffer slot

[0196] 2817 perforation

[0197] 2818 Fixed Pin Support

[0198] 2819 gap

[0199] 2820 buffer components, buffer bars

[0200] 2821 clubhead

[0201] 2830 guide element, guide rod

[0202] 2831 clubhead

[0203] 2840 elastic element

[0204] 2850 Fasteners

[0205] 2860 limit pin

[0206] 2861 pin

[0207] 2870 fixed pin

[0208] 2871 pin

[0209] 2I-2I section line

[0210] Section 2II-2II

[0211] 310. Vehicle body; 311. Seat section; 311a. Reception cavity; 311b. Opening; 312. Backrest section; 313. Passenger space; 320. Seatbelt assembly; 3100. Shoulder strap assembly; 3110. First end; 3120. Shoulder strap body; 3130. Shoulder strap buckle; 3200. Crotch strap assembly; 3210. Third end; 3220. Fourth end; 3230. Crotch strap body; 3240. Crotch strap buckle; 3300. Adjustment strap; 3310. Fifth end; 3400. Self-locking mechanism; 3410, mounting base; 3411, winding part; 34111, outer wall; 34112, first limiting rod; 34113, first through-hole; 3412, mounting part; 34121, first mounting groove; 34122, through hole; 3420, driving component; 3421, driving body; 34211, third mounting groove; 34212, mounting recess; 34213, first fitting protrusion; 34214, mating inclined surface; 34215, mating plane; 3422 3430, driving protrusion; 3431, locking element; 3432, locking body; 33440, mounting protrusion; 33440, fixing bracket; 441, frame body; 34411, through slot; 34412, limiting part; 3442, first fixing part; 3443, second fixing part; 3451, first reset element; 3452, second reset element; 3460, pushing element; 3461, pushing part; 34611, pushing inclined surface; 34612, pushing plane; 3462, winding end; 3 4621. Circumferential surface; 3463. Second limiting rod; 3464. Second through-hole; 3465. Through groove; 3466. Second mounting groove; 3467. Second sleeve protrusion; 3471. First guide rod; 3472. Second guide rod; 3473. Limiting pin; 3500. Rotating seat; 3510. Rotating disk; 3511. Pushing protrusion; 3520. Connecting rod; 3600. Pin shaft; 3700. Length adjustment mechanism; 3800. Fixed seat; 3101. Pulling gap. Detailed Implementation

[0212] While this disclosure has been illustrated and described with reference to specific embodiments, it should not be limited to the details shown. Rather, various modifications to these details may be made within the scope of equivalents of the claims and without departing from this disclosure.

[0213] The descriptions of directions such as "front", "back", "up" and "down" used in this document are for ease of understanding only. This disclosure is not limited to these directions, but can be adjusted according to the actual situation. Although this application has been described with reference to typical embodiments, the terminology used is illustrative and exemplary, and not restrictive.

[0214] To adjust the length of the seat belts in child safety seats, a seat belt length adjustment mechanism (Harness Adjustment Lock) is typically installed at the front of the seat. The adjustment strap of the seat belt assembly extends from this mechanism, and the length of the seat belt assembly is adjusted by adjusting the strap. However, in some child safety seats on the market, friction occurs between the adjustment strap and the base during seat belt length adjustment, causing wear and tear on the edges of the adjustment strap, leading to consumer complaints.

[0215] The first aspect of this disclosure is:

[0216] Figure 1 A perspective view and a partial view of a child safety seat (also referred to as a child vehicle according to a third aspect of this disclosure) 11A are shown, with the partial view primarily showing the structure of the seat belt length adjustment structure 1100A. The child safety seat 11A, for example, is a child vehicle that can be combined with a base 12A below, which is detachably and fixedly connected to a vehicle seat. The child safety seat 11A includes a base 1200A, a backrest 1300A, a headrest 1400A, side wings 1500A located 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 consisting of a shoulder strap 1610A and a lap belt 1620A, and an adjustment strap 1630A. The adjustment strap 1630A and the shoulder strap 1610A are connected to each other at the rear of the child safety seat 11A for adjusting the length of the shoulder strap 1610A. The shoulder strap 1610A and waist belt 1620A can be manufactured separately or made from a single seat belt.

[0217] The child safety seat 11A also includes a seat belt length adjustment structure 1100A, which is located in a recessed opening 1210A in the middle of the front edge of the seat portion 1200A. The opening 1210A includes a bottom wall 1212A, a rear wall 1213A, and two side walls 1214A, which are substantially perpendicular to the bottom wall 1212A and the rear wall 1213A.

[0218] The inventors discovered during their research that parents (users) of infants and toddlers often adjust the length of the seat belt 610A by pulling the adjustment strap 1630A from one side 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 in the left seat of the second row of the vehicle, and the user is sitting in the right seat of the second row, the user attempts to pull the end of the adjustment strap 1630A located at the front end of the base 12A from the right side in order to adjust the length of the seat belt 610A (shoulder strap) of the child safety seat 11A. At this time, the direction of movement of the adjustment strap 1630A is not towards the front of the base 12A, but rather to the right or upper right. As a result, friction occurs between the right edge of the adjustment strap 1630A and the right side wall of the opening 1210A of the base 12A, which may cause wear and fraying of the edge of the adjustment strap 1630A.

[0219] The locking mechanism of the seat belt length adjustment structure 1100A includes a fixed base 1120A, a locking block 1110A pivotally connected to the fixed base 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 supports 1123A raised on both sides of the fixed base 1120A and held in the locked position by the reset member. When the locking block 1110A is in the locked position, the adjustment strap 1630A of the seat belt assembly 1600A, or shoulder strap 1610A, such as the adjustment webbing, is locked at the outlet 1122A between the fixed base 1120A and the locking block 1110A, so that the shoulder strap 1610A is maintained at a length suitable for the currently riding child. When the shoulder strap 1610A is not the right length for a child, the user can press the rear of the locking block 1110A through the gap above the locking block 1110A at the rear of the opening 1210A, for example, by pressing the rear of the locking block 1110A. This causes the front end of the locking block 1110A, which forms an outlet 1122A with the fixing seat 1120A, to be pivotally lifted, thereby allowing the adjustment strap 1630A to 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. Only the two front fixing holes 1121A are shown here.

[0220] Locking block 1110A locks the adjustment strap 1630A in different positions to adjust the length of the shoulder strap 1610A. When the user operates the adjustment strap 1630A from the side of the child safety seat 11A, for example while the vehicle is in motion, the adjustment strap 1630A is often not pulled perpendicular to the seat 1200, but may instead be biased to one side. This causes the edge of the adjustment strap 1630A to rub against, for example, the edge of the seat 1200A or the edge of the opening 1210A, resulting in wear and fraying of the adjustment strap 1630A, affecting its appearance and causing consumer complaints. If the adjustment strap 1630A is pulled diagonally upwards, it may also get stuck in the gap between the fixing seat 1120A and the locking block 1110A, preventing the user from pulling the adjustment strap 1630A and rendering the adjustment function ineffective.

[0221] Figure 2 This diagram shows a perspective view and a partial view of a child safety seat 11 according to an embodiment of the present disclosure. The partial view mainly shows the structure of the seat belt length adjustment structure 1100. The cross-sectional view along section line 1A-1A in the partial view is shown in... Figure 5 and Figure 7 Two embodiments are shown separately. According to this disclosure, a 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 seat belt assembly 1600. The seat belt assembly 1600 includes a seat belt consisting of a shoulder strap 1610 and a lap belt 1620, and an adjustment strap 1630. The adjustment strap 1630 is connected to the shoulder strap 1610 at the rear of the child safety seat 100 and is used to adjust the length of the shoulder strap 1610. The adjustment strap 1630 has an adjustment section 1631 extending from the outside of the child safety seat 100 and a connecting section 1632 located inside the child safety seat 100 (see...). Figure 5 , 7 The connecting section 1632 connects to the shoulder strap 1610 of the seat belt, and the adjusting section 1631 extends out of the seat 1200 from the opening 1210, with the edge of the adjusting section 1631 facing the side wall 1214 of the opening 1210. The shoulder strap 1610 and the lap belt 1620 can be manufactured separately or made from a single seat belt.

[0222] from Figure 2 Also exemplarily seen is the buckle 1700 and the connecting strap 1710 connecting the buckle 1700 to the seat 1200. The buckle 1700 is used to fasten the seat belt of the child safety seat 11, or to fasten the junction of the shoulder strap 1610 and the lap belt 1620. The other end of the shoulder strap 1610 is connected to the adjustment strap 1630, for example, at the rear of the child safety seat 11. The length of the shoulder strap 1610 fastened to the buckle 1700 can be adjusted by the adjustment strap 1630 to adapt to the child's riding needs and to secure the child in the child safety seat 11.

[0223] According to this disclosure, the child safety seat 11 includes a seat belt length adjustment structure 1100 located in an opening 1210 at the center of the front edge of the seat 1200 and including a cover 1130. The cover 1130 is fixed in the opening 1210, for example by two vertical rivets 1810, and covers the seat belt length adjustment structure 1100. The shape of the cover 130 matches the shape of the seat 1200 to improve riding comfort. The cover 1130 and the opening 1210 are configured to form an adjustment strap hole and a release hole; the adjustment strap hole and the release hole are spaced apart, with an adjustment section 1631 passing through the adjustment strap hole, and the release portion 1112 of the locking member of the adjustment strap 1630 exposed outside the cover 1130 through the release hole. The user inserts a finger into the release hole and presses the release portion 1112 to pivot, thereby unlocking the lock block 1110A to prevent accidental activation.

[0224] According to this disclosure, a protective device, or roller, is provided between the cover 1130 and the seat 1200A. The protective device, for example, is a vertical roller 1810, respectively fitted onto two vertical rivets 1811 located on both sides of the adjusting band 1630. The vertical roller 1810 is located between the side wall 1214 and the adjusting section 1631 of the adjusting band 1630. According to this embodiment, the vertical roller 1810 includes a first vertical roller and a second vertical roller, respectively located on both sides of the adjusting band 1630 in the width direction. The distance between the first vertical roller and the second vertical roller is greater than the width of the adjusting band 1630. Alternatively or additionally, the vertical roller 1810 can be pivotally connected to at least one of the seat 1200 and the cover 1130 via the vertical rivets 1811. In some embodiments, the upper end of the vertical rivet 1811 is fixed only to the cover 1130 to reduce production and assembly costs. 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, thereby making the vertical roller 1810 more securely fixed.

[0225] According to this embodiment, the height of the outlet portion 1132 of the cover 130 is lower than the height of the covering portion 1131. The outlet portion 1132 covers the vertical roller 1810, and the covering portion 1131 of the cover 130 partially covers the locking member, or the locking block 1112 of the locking member. The covering portion 1131 forms a clearance space for the pivoting movement of the locking block 1112. The lower height of the outlet portion 1132 limits the vertical movement range of the adjusting belt, thereby preventing incomplete engagement between the adjusting belt and the locking block 1112 due to flipping, folding, etc. The vertical roller is provided in the outlet portion 1132. A vertical roller with a smaller height can be used to reduce costs; or a roller with an inwardly concave outer circumferential surface can be used to further reduce the friction between the adjusting belt and the vertical roller.

[0226] When a user operates the adjustment strap 1630 from either side of the child safety seat 11, and the strap is inadvertently pressed towards the sides of the seat 1200 due to space constraints, the vertical roller 1810 can roll relative to the vertical rivet 1811, thereby reducing friction between the adjustment strap 1630 and other components and reducing wear on the strap 1630. Simultaneously, the rolling action of the vertical roller 1810 also prevents the adjustment strap 1630 from getting stuck with other components, thus providing a better user experience.

[0227] Figure 3 A perspective view of a cover 1130 according to an embodiment of the present disclosure is shown. The cover 1130 includes a covering portion 1131 and an outlet portion 1132, which are integrally formed or separately manufactured and combined. The covering portion 1131 is used to cover the seat belt length adjustment structure 1100, and the outlet portion 1132 is used to adjust the entry and exit of the belt 1630.

[0228] The covering portion 1131 includes an upper wall 11311 and a side wall 11312. The shape of the upper wall 11311 can be adapted to the surrounding components; for example, it can be designed as a recess at the rear end or as a flat portion. A notch 1137 is provided on the lower side of the side wall 11312. The notch 1137 is used to avoid obstructing components of the seat belt length adjustment structure 1100, such as the support 1123 of the pivot shaft of the locking block 1110. For example, it can be designed as an arc shape as shown in the figure. The side wall 11312 also has a connecting protrusion 1136, which connects to the connecting groove 1211 on the opening 1210 of the seat portion 1200 (see figure). Figure 4 , Figure 6 It is used to connect and fix the cover 1130 to the opening 1210.

[0229] The upper wall 11311 of the cover also has a recess 1134 at the front, and a through hole 1135 for the transverse rivet 1820 to pass through is provided in the recess 1134. The head of the transverse rivet 1820 can pass through the through hole 1135 and be accommodated in the recess 1134, so that the transverse rivet 1820 can be more firmly engaged with the cover 1130.

[0230] The outlet section 1132 includes an upper wall 11321 and a side wall 11322 to form an inlet and outlet for the adjustment band 1630. A through hole 1133 for a vertical rivet 1811 to pass through is provided on the upper wall 11321, and the two through holes 1133 are located on both sides of the upper wall 11321.

[0231] Figure 4A perspective view and a partial view of a child safety seat according to an embodiment of the present disclosure are shown, the partial view mainly showing the structure of the seat belt length adjustment structure 1100. Figure 4 Removed Figure 2 and Figure 3 The cover 1130 shown exposes the seat belt length adjustment structure 1100. This seat belt length adjustment structure 1100 includes a locking member in an opening 1210 located at the center of the front edge of the seat portion 1200. The locking member is fitted onto the adjustment section 1631 of the adjustment belt 1630 to operably lock the adjustment belt 1630. The locking member includes a fixing base 1120, a locking block 1110 pivotally connected to the fixing base 1120, and a reset member (not shown) that constantly biases the locking block 1110 towards 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 fixing base 1120 and the locking block 1110. Locking block 1110 is pivotally connected to the raised sides of the fixed seat 1120, and held in a locked position by a reset member. When locking block 1110 is in the locked position, the adjustment strap 1630 of the shoulder strap 1610 of the child safety seat 11, such as the adjustment webbing, is locked at the outlet 1122 between the fixed seat 1120 and locking block 1110, so that the shoulder strap 1610 is maintained at a length suitable for the currently seated child. When the length of the shoulder strap 1610 is not suitable for the child, the user can press the rear of the locking block 1110 through the gap above the opening 1210, for example by pressing the rear of the locking block 1110, so that the front end of the locking block 1110 that forms the outlet 1122 with the fixed seat 1120 is pivotally lifted, thereby allowing the adjustment strap 1630 to be partially pulled out or retracted from the seat 1200. The mounting base 1120 is fixed to the bottom wall of the opening 1210 by means of mounting holes 1121, for example by rivets; only the two front mounting holes 1121 are shown here. According to this embodiment, a locking member is provided at the opening 1210 and sleeved on the adjusting section 1631 of the adjusting belt 1630, thereby operably locking the adjusting belt 1630. The vertical roller 1810 is closer to the end of the adjusting section 1631 than the locking member.

[0232] According to this disclosure, vertical rollers 1810 and vertical rivets 1811 are provided on both sides of the front end of the opening 1210 in front of the fixing base 1120, located on the side of the adjusting section 1631 of the adjusting band 1630 in the width direction. The vertical rollers 1810 are closer to the end of the adjusting section 1631 than the locking member. The adjusting band 1630 is pulled out from the outlet 1122 and passes through the fixing hole 1121 before passing between the two vertical rollers. The vertical rollers 1810 are preferably made of plastic or other soft materials, and the shape of the vertical rollers 1810 can be set as a cylindrical roller or, for example, a concave roller or other forms of roller.

[0233] Figure 4 The image also shows a connecting groove 1211 on the side wall of the opening 1210. This connecting 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 connecting protrusion 1136 on the side wall 1312 of the cover 1130 is inserted into the connecting groove 1211 to fix the cover 1130 in the opening 1210.

[0234] Figure 5 This diagram shows a side cross-sectional view of a cover 1130 and a seatbelt length adjustment structure 1100 according to an embodiment of the present disclosure. The cross-sectional view is along... Figure 2 Section line 1A-1A in the middle is cut open and corresponding to Figure 4 Examples of implementations.

[0235] The locking block 1110 includes a locking portion 1111, a releasing portion 1112, and a pivot shaft 1113. The pivot shaft 1113 is supported, for example, on supports 1123 formed on both sides of the fixed base 1120, so that the locking block 1110 can pivot. The locking portion 1111 is designed with a toothed structure at its lower end. When the locking block 1110 is in the locked position, the toothed structure presses the adjustment strap 1630 against the fixed base 1120 to lock the length of the shoulder strap. The releasing portion 1112 can be designed as a pressure plate, as shown. The user can press the upper side of the pressure plate with their hand to overcome the constant force of the locking block 1110 locking the adjustment strap 1630 by a reset element (not shown), such as a torsion spring, causing the releasing portion 1112 to pivot downwards, while the locking portion 1111 lifts up, releasing the adjustment strap 1630 for adjustment.

[0236] 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, while the vertical roller 1810, which is sleeved on the outside of the vertical rivet 1811, is located between the outlet 1132 and the seat 1200 and can rotate freely to avoid wear on the adjusting 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, while advantageously facilitating an opening for operating the locking block 1110.

[0237] Figure 6A perspective view and a partial view of a child safety seat 11 according to another embodiment of the present disclosure are shown, with the partial view mainly showing the structure of the seat belt length adjustment structure 1100. According to this embodiment, a transverse roller 1820 is also provided in the opening 1210 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 upwards. According to this embodiment, the transverse roller 1820 is disposed between the vertical roller 1810 and the outlet 1122, above the adjustment belt 1630, and connected to the cover 1130 by, for example, a transverse rivet 1821. Alternatively, the transverse roller 1820 may also be rotatably disposed between the two side walls of the opening 1210 by other means, such as a pivot. The transverse roller 1820 restricts the upward pulling of the adjustment belt 1630, preventing the adjustment belt 1630 from being caught 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 upwards, the adjusting belt 1630 will roll into contact with the transverse roller 1820, which will not affect the smoothness of the sliding of the adjusting belt 1630.

[0238] According to this disclosure, the transverse roller 1820 extends along the width direction of the adjusting section 1631, and the bottom wall 1212 of the opening 1210 and the adjusting belt 1630 are respectively located on both sides in the thickness direction of the adjusting belt 1630. The transverse roller 1820 is located between the vertical roller 1810 and the locking member or locking block 1110, and the projection of the transverse roller 1820 on the side wall 1214 of the opening 1210 partially coincides with the projection of the vertical roller 1810 on the side wall 1214, thereby reducing the gap between the vertical roller 1810 and the transverse roller 1820 and preventing the adjusting belt from getting 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 distance 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 distance between the rotation axis of the first vertical roller and the rotation axis of the second vertical roller, but greater than the distance between the first vertical roller and the second vertical roller (i.e., the first vertical roller and the second vertical roller).

[0239] Figure 7 This diagram shows a side cross-sectional view of a cover 1130 and a seatbelt length adjustment structure 1100 according to another embodiment of the present disclosure, the cross-section being along... Figure 2 Section line 1A-1A in the middle is cut open and corresponding to Figure 5 Examples of implementations.

[0240] The locking block 1110 includes a locking portion 1111, a releasing portion 1112, and a pivot shaft 1113. The pivot shaft 1113 is supported, for example, on supports 1123 formed on both sides of the fixed base 1120, so that the locking block 1110 can pivot. The locking portion 1111 is designed to have a toothed structure or a rough surface structure on the lower side to increase the friction between it and the adjusting band. The toothed structure can press and lock the adjusting band 1630 in the locked position of the locking block 1110. The releasing portion 1112 can be designed as a pressure plate as shown. The user can press the upper side of the pressure plate with his hand to overcome the constant locking force of the locking block 1110 to lock the adjusting band 1630 by a reset member (not shown), such as a torsion spring, so that the releasing portion 1112 pivots downward and the locking portion 1111 is lifted, releasing the adjusting band 1630 for adjustment.

[0241] 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, while the vertical roller 1810, which is sleeved on the outside of the vertical rivet 1811, is located between the outlet 1132 and the seat 1200 and can rotate freely to avoid wear on the adjusting 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, while advantageously facilitating an opening for operating the locking block 1110.

[0242] As can be seen from this embodiment, the transverse rivet 1820 can be fixed to the cover 1130, for example, fixed to... Figure 3 In the perforation 1135 shown, the transverse roller 1820 is sleeved on the transverse rivet 1821 and rolls freely to prevent the adjusting belt 1630 from rubbing upward against the cover 1130 or other components. In some embodiments, the cover may be omitted, and the transverse roller 1820 may be directly mounted on the child safety seat 11 via the transverse rivet 1821.

[0243] According to this disclosure, the transverse roller 1820 extends along the width direction of the adjusting section 1631 of the adjusting belt 1630, that is, the direction of the rotation axis of the transverse roller 1820 is orthogonal to the movement direction of the adjusting belt 1630. The transverse roller 1820 and the bottom wall 1212 are respectively located on both sides of the thickness direction of the adjusting belt 1630. In some embodiments, the transverse roller 1820 is located between the vertical roller 1810 and the locking member or locking block 1110, and is closer to one side of the vertical roller 1810. The width of the rotation surface of the transverse roller 1820 is greater than the minimum distance between the rotation surfaces of the two vertical rollers 1810, and less than the distance between the rotation axes of the two vertical rollers 1810. The rotation surface of the transverse roller 1820 and the rotation surface of the vertical roller 1810 partially overlap 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 results in a tighter gap between the horizontal roller 1820 and the vertical roller 1810, reducing the tension of the adjusting belt within the gap between the horizontal roller 1820 and the vertical roller 1810.

[0244] According to the present disclosure, the outlet 1122 of the adjustment belt 1630 of the seat belt length adjustment structure 1100 of the child safety seat 11 is provided with a structure to prevent the adjustment belt 1630 from swinging left and right. When the adjustment belt 1630 is pulled, the structure to prevent the adjustment belt 1630 from being pulled too far to the left or right will prevent the adjustment belt 1630 from rubbing against the child safety seat 11.

[0245] Specifically, the child safety seat 11 has a roller structure at the outlet 1122 of the adjustment belt 1630 of the seat belt length adjustment structure 1100. When the adjustment belt 1630 is pulled, the adjustment belt 1630 contacts the roller, the roller rotates, and the friction between the two is small.

[0246] By installing 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. When the adjustment belt 1630 is adjusted, the rollers rotate, resulting in less friction between the two. In addition, a transverse roller 1820 is installed at the top of the outlet of the adjustment belt 1630 to prevent the adjustment belt 1630 from being clamped due to excessive upward pulling. At the same time, the friction between the adjustment belt 1630 and the rollers is small, and the sliding is smooth.

[0247] In the event of an accidental impact, when a child is thrown forward and then back, they come into direct contact with the seat. Due to the large impact force, the seat belt may tighten too much while tightening, causing it to strangle the child and resulting in a secondary accident and injury.

[0248] The second aspect of this disclosure:

[0249] Figure 8 A perspective view of a child safety seat according to an embodiment of the present disclosure is shown. The child safety seat includes a seat belt length adjustment structure 2100, a seat portion 2200, a backrest portion 2300, a headrest portion 2400, side wings 2500, a seat belt assembly 2600, and a buckle 2700, wherein the seat portion 2200 and the backrest portion 2300 together constitute the seat body 21.

[0250] The seatbelt assembly 2600 includes shoulder straps 2610, crotch straps 2620, adjustment straps 2630, and connectors 2640. The shoulder straps 2610 are divided into two groups, each of which can be made entirely of a single webbing or similar material. After the child is seated, the two webbing straps are connected to buckles 2700 via connectors 2640. Buckles 2700 are connected to the seat 2200 via connecting straps 2710. Buckles 2700 have a flat opening at the bottom for the connecting strap 2710, such as a flexible fabric or similar material, to pass through. Both ends of the connecting strap 2710 are connected to the seat 2200.

[0251] In this case, the fabric strip above the connector 2640 forms a shoulder strap 2610, and the fabric strip below the connector 2640 forms a crotch strap 2620. Figure 8 As can be seen, one end (i.e., the fixed end) of each shoulder strap 2610 is fixedly connected to the surface of the seat 2200, and the other end passes through a through hole in the backrest 2300 to enter the interior of the backrest 2300. The portion of the shoulder strap 2610 inside the backrest 2300 is connected to one end of the adjustment strap 2630, which is also located at the rear of the seat body 21. The other end (i.e., the free end) of the adjustment strap 2630 passes through the seat belt length adjustment structure 2100 and the opening at the front end of the seat 2200, and extends out of the seat body 21. The free end of the adjustment strap 2630 is operably locked at the seat belt length adjustment structure 2100, and the user can adjust the length of the shoulder strap 2610 exposed outside the backrest 2300 by pulling the free end of the adjustment strap 2630. In some embodiments, the shoulder strap 2610 and the adjustment strap 2630 may be composed of a single, continuous webbing. The adjustment strap 2630 can also be considered as part of the seat belt assembly.

[0252] The seat belt length adjustment structure 2100 is located at the front center of the seat 2200. The length of the shoulder strap 2610 is adjusted by releasing and locking the adjustment strap 2630 to accommodate children of different sizes. Figure 8 The cover 2130 used to cover the seat belt length adjustment structure 2100 can be seen, and the shape of the cover 2130 matches the seat 2200.

[0253] Figure 9AThis invention discloses a cross-sectional perspective view and a partial enlarged view of a child safety seat according to an embodiment of the present disclosure. The seat body 21 is based on... Figure 8 The section line 2I-2I schematically cuts through the image, and the enlarged view of the part basically shows the location of the seat belt length adjustment structure 2100.

[0254] Buckle 2700 passes through flexible connecting strap 2710, the end of which is fixed to the upper surface of seat 2200, such that buckle 2700 is located in the seating space enclosed by seat 2200, side wing 2500 and backrest 2300, and engages with seat belt assembly 2600 (not shown) after the child sits in to ensure the child's safety. According to this embodiment, shoulder strap 2610 passes through a through hole in backrest 2300 and extends downward to the underside of seat body 21.

[0255] The enlarged view shows the adjustment belt 2630, the seat belt length adjustment structure 2100, and the seat belt buffer mechanism 2800. The free end of the adjustment belt 2630 extends from the lower rear part of the seat body 21, passes sequentially through the seat belt buffer mechanism 2800 and the seat belt length adjustment structure 2100, and then extends from the front of the seat 2200.

[0256] The seat belt length adjustment structure 2100 is located in a recessed opening 2210 at the center of the front edge of the seat portion 2200. The opening 2210 includes a bottom wall 2212, a rear wall 2213, and two side walls 2214, which are substantially perpendicular to the bottom wall 2212 and the rear wall 2213. The seat belt length adjustment structure 2100 includes a locking element consisting of a locking block 2110 and a fixing seat 2120, and a cover 2130. Locking block 2110 is rotatably pivoted onto fixed base 2120 and held in the locked position by a reset member (not shown) that constantly biases locking block 2110 toward the locked position. When locking block 2110 is in the locked position, the adjustment strap 2630 of shoulder strap 2610 of seat belt assembly 2600, such as adjustment webbing or the like, is locked at adjustment strap outlet 2216 between fixed base 2120 and locking block 2110, so that the length of shoulder strap 2610 adapted to the currently riding child is maintained. When the length of shoulder strap 2610 is not suitable for the child, the user can adjust the shoulder strap 2610 by pressing the rear of the opening 2210 above locking block 2110, for example by pressing the rear of locking block 2110 with his hand, so that the front end of locking block 2110 forming adjustment strap outlet 2216 with fixed base 2120 is pivotally lifted, thereby allowing adjustment strap 2630 to be partially pulled out or retracted from seat 2200. The mounting base 2120 is fixed to the bottom wall 2212 of the opening 2210 by means of a fixing hole, for example, by means of a fixing hole. The adjustment strap 2630 enters the seat belt length adjustment structure 2100 from the adjustment strap inlet 2215 below the rear wall 2213, lies flat on the mounting base 2120 with its width side facing out, slides between the locking block 2110 and the mounting base 2120, and finally extends out of the seat belt length adjustment structure 2100 by the adjustment strap outlet 2216 formed by the cover 2130 and the bottom wall 2212.

[0257] According to this disclosure, a seatbelt buffer mechanism 2800 is provided on the other side of the rear wall 2213 of the opening 2210, opposite to the seatbelt length adjustment structure 2100. When a car equipped with the seat body 21 decelerates suddenly due to an accidental collision or other reasons, the child will move forward or backward, causing the seatbelt to tighten. When the seatbelt tightens, it needs to overcome the elastic force of the seatbelt buffer mechanism 2800, thereby buffering the tightening of the seatbelt and preventing the seatbelt from strangling the child and causing injury.

[0258] The adjusting band 2630 is adapted to the seat belt buffer mechanism 2800, which has a bent section 2631. As the seat belt buffer mechanism 2800 buffers, the bent section 2631 changes its curvature. Since the adjusting band 2630 is made of a flexible, elastic material, this change in curvature advantageously provides a buffering effect. According to this disclosure, for example, when the locking block 2110 of the seat belt length adjustment structure 2100 locks the adjusting band 2630, the bent section 2631 of the adjusting band 2630 provides a longer adjustment allowance. This allowance is provided so that when a child's body lurches forward during vehicle braking and emergencies, causing the seat belt to move, the adjusting band 2630 can better adapt to the distance the child lurches forward, preventing the seat belt from constricting the child.

[0259] After passing through the seat belt buffer mechanism 2800, the adjustment belt 2630 enters the seat belt length adjustment structure 2100 from the rear edge of the bottom wall 2212 through the adjustment belt inlet 2215 in a manner parallel to the bottom wall 2212.

[0260] The seatbelt buffer mechanism 2800 includes a mounting bracket 2810, a buffer element 2820, a guide element 2830, an elastic element 2840, a fastener 2850, and a limiting pin 2860. According to this disclosure, the mounting bracket 2810 is used to secure the seatbelt buffer mechanism 2800 to the seat body 21. The mounting bracket 2810 includes an upper wall 2811, a side wall 2812, a buffer element support 2814, a guide rod support 2815, and a buffer groove 2816. Specifically, the upper wall 2811 of the mounting bracket 2810 is secured to a mounting portion 2220 by fasteners 2850, such as bolts or rivets. The mounting portion 2220 is configured to mount the seatbelt buffer mechanism 2800 and is located below 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 fixed frame 2810 and has a first position as shown in the figure (see also...). Figure 13 ), and the second position (see Figure 14 The seatbelt assembly 2600 is configured to partially surround the buffer member 2820. According to this embodiment, the buffer member 2820 is slidably embedded in a buffer groove 2816 provided in the sidewall 2812 and is displaceable, for example, sliding, within the buffer groove 2816. The adjustment strap 2630 abuts against the buffer member 2820. The buffer groove 2816 is constructed as an elongated strip perpendicular to the adjustment strap 2630 to cushion the force on the adjustment strap 2630 from a vertical direction. A limiting pin 2860 of the seatbelt buffer mechanism 2800 slides in the buffer groove 2816 and supports the displacement of the buffer member 2820; the limiting pin 2860 is, for example, inserted into the buffer member 2820.

[0261] According to Figure 9, the buffer 2820 is located at the bottom of the buffer groove 2816. In this case, the buffer 2820 is in a normal operating state without emergency braking or other incidents. When the seat belt length is manually adjusted or during emergency braking, the buffer 2820 can slide upward due to the upward force applied by the bending section 2631 of the adjusting belt 2630 when the seat belt is tightened.

[0262] According to this disclosure, an elastic element 2840, such as a compression spring, is provided between the buffer 2820 and the upper wall 2811. The elastic element 2840 is disposed between the fixing frame 2810 and the buffer 2820, or it may be disposed between the seat body 21 and the buffer 2820, and biases the buffer 2820 in the direction of the first position. The elastic element 2840 always applies a pushing force to the buffer 2820, so the upward movement of the buffer 2820 is buffered by the elastic force of the elastic element 2840, thereby effectively preventing the risk of injury to children due to impact. The buffer 2820 is preferably configured as an arc or semi-circle on the side facing the adjustment strap 2630, having a width corresponding to the width of the adjustment strap 2630. On the other side away from the adjustment strap 2630, the buffer 2820 is designed, for example, as a cylindrical protrusion to facilitate the insertion and fixation of the elastic element 2840. According to this embodiment, as the adjustment belt 2630 is intentionally pulled or unintentionally pulled when the vehicle is impacted, the buffer 2820 can pivot advantageously during sliding by means of the limiting pin 2860 inserted in the buffer groove 2816. Due to the interaction between the buffer 2820 and the adjustment belt 2630, the movement of the seat belt is further buffered.

[0263] The seatbelt buffer mechanism 2800 also includes a guide 2830 for guiding the seatbelt assembly 2600 through the seatbelt buffer mechanism 2800. According to this embodiment, the guide 2830 is configured as a guide rod 2830, which is advantageously rotatably supported in the mounting bracket 2810 for changing the direction of movement of the adjusting strap 2630. Specifically, the guide rod 2830 is configured such that the direction in which the adjusting strap 2630 enters the seatbelt buffer mechanism 2800 is parallel to the direction in which it exits the seatbelt buffer mechanism 2800. According to this embodiment, two guide rods 2830 are located on both sides of the buffer member 2820 along the direction of the adjusting strap 2630. Advantageously, the two guide rods 2830 are symmetrically arranged with respect to the buffer member 2820, i.e., at the same height, thereby allowing the adjusting strap 2630 to provide a more uniform tension to the buffer member 2820.

[0264] Figure 9B 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. Figure 9AIn a different embodiment, the backrest 2300 is provided with a reinforcing bar 2310 at the rear, and each of the shoulder straps 2610 is configured to pass over the reinforcing bar 2310 from the upper part of the backrest 2300 and connect to the adjustment strap 2630.

[0265] 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 over the reinforcing rod 2310 between the two ends. The reinforcing rod 2310 allows the shoulder strap 2610 to extend 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.

[0266] Figure 10 A cross-sectional side view and a partial enlarged view of a child safety seat according to an embodiment of the present disclosure are shown. Figure 10 The positions of the components in the figure correspond to those in Figure 9.

[0267] In this embodiment, the locking block 2110 does not lock the adjustment strap 2630, and the user can manually pull the adjustment strap 2630 to adjust the length of the seat belt. Advantageously, after the child is seated in the seat body 21 and the seat belt is adjusted to the appropriate length, the locking block 2110 locks the adjustment strap 2630, and the seat belt buffer mechanism 2800 can better provide a cushioning effect.

[0268] The seat belt length adjustment structure 2100 is located in the opening 2210 of the seat 2200 and on the front side of the rear wall 2213. Conversely, on the other side of the rear wall 2213, inside the seat 2200, a seat belt buffer mechanism 2800 is mounted on the mounting part 2220 using fasteners 2850. The adjustment belt 2630 extends from the rear side of the backrest 2300 to the underside of the seat 2200, first passing through the seat belt buffer mechanism 2800, then the left guide bar 2830, and then passes substantially straight through the adjustment belt inlet 2815 in the rear wall 2213, sliding on the fixing seat 2120 of the seat belt length adjustment structure 2100. Finally, the adjustment belt 2630 extends out of the seat 2200 through the adjustment belt outlet 2216 formed between the cover 2130 and the bottom wall 2212 of the opening 2210. According to this embodiment, it is advantageous that at least the guide rod 2830 near the fixing seat 2120 is at the same height as the upper side of the fixing seat 2120 of the seat belt length adjustment structure 2100.

[0269] According to this disclosure, the sidewalls 2812 of the mounting bracket 2810 are advantageously designed in an inverted trident shape, with a buffer support 2814 in the middle and guide rod supports 2815 on both sides, wherein the buffer 2820 and the guide rods 2830 can be pivotally supported. According to this embodiment, material savings and weight reduction are possible.

[0270] Figure 10 The configuration of the buffer 2820 can be better seen in the image. According to this embodiment, the contact portion between the buffer 2820 and the adjusting belt 2630 is configured as an arc-shaped portion, and the connection portion with the elastic member 2840, such as a compression spring, is configured as a cylindrical portion. A receiving portion for supporting the end of the compression spring is formed between the arc-shaped portion and the cylindrical portion. In the event that the seatbelt is suddenly tightened due to a child's forward movement caused by a vehicle impact or emergency braking, this configuration of the buffer 2820 can effectively slow down the movement of the adjusting belt 2630.

[0271] According to this disclosure, the material of the buffer member 2820 can be selected to have a large frictional force with the adjusting belt 2630. Combined with the flexible tensile force of the adjusting belt 2630, the seat belt buffer mechanism 2800 can provide a buffering effect without the elastic member 2840. In this case, the buffer member 2820 is fixedly disposed in the fixing frame 2810 of the seat belt buffer mechanism 2800.

[0272] Figure 11 This invention discloses a cross-sectional perspective view and a partial enlarged view of a child safety seat according to an embodiment of the present disclosure. The seat body 21 is based on... Figure 8 The section line 2I-2I schematically cuts through the image, and the enlarged view of the part basically shows the location of the seat belt length adjustment structure 2100.

[0273] Figure 11 In this configuration, the buffer 2820 is in a buffered state. In this state, for example, if a child's body lurches forward due to emergency braking, the adjusting belt 2630 is suddenly pulled backward. At this time, the adjusting belt 2630 applies an upward force to the buffer 2820, causing the buffer 2820 to slide upward in the buffer groove 2816 under the action of the limiting pin 2860. As the buffer 2820 displaces, the elastic element 2840 is compressed, thereby increasing the elastic force and buffering the movement speed of the adjusting belt 2630.

[0274] Figure 12 A cross-sectional side view and a partial enlarged view of a child safety seat according to an embodiment of the present disclosure are shown. Figure 12 The position of the component in the middle corresponds to Figure 11 .

[0275] from Figure 12 It can be clearly seen that the buffer 2820 moves upward along the buffer groove 2816 by a certain distance, thus exposing the lower part of the buffer groove 2816. The bending section 2631 of the adjusting belt 2630 between the two guide rods 2830 becomes smoother due to the upward movement of the buffer 2820, thereby buffering the movement of the seat belt connected to the adjusting belt 2630.

[0276] Figure 13A perspective view of a seatbelt buffer mechanism 2800 according to an embodiment of the present disclosure is shown. The seatbelt buffer mechanism 2800 includes a fixing frame 2810, a buffer member 2820, a guide rod 2830, an elastic member 2840, and a limiting pin 2860. The buffer member 2820 is located at the aforementioned first position at the lowermost end of the buffer groove 2816, that is, the buffer member 2820 is only subjected to the downward pushing force of the elastic member 2840.

[0277] 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 this embodiment, the buffer support 2814 and the guide rod support 2815 are formed by the side walls 2812, thus forming an inverted trident shape. An elongated buffer groove 2816 is provided in the buffer support 2814. The pin head 2861 of the limiting pin 2860 of the buffer 2820 passes through the buffer groove 2816, allowing the buffer 2820 to slide up and down along the buffer groove 2816 between the two side walls 2812, and the buffer 2820 can pivot around the limiting pin 2860. One end of the elastic member 2840 abuts against the upper wall 2811, and the other end abuts against the buffer 2820; the elastic force keeps the buffer 2820 at the lowest end of the buffer groove 2816. The guide rod support 2815 is provided with a through hole 2817 for the rod head 2831 of the guide rod 2830 to pass through, and the guide rod 2830 can advantageously pivot in the through hole 2817.

[0278] The seatbelt buffer mechanism 2800 also includes fixing holes 2813 for secure connection with the seat 2200. According to this disclosure, it is preferable to provide at least two fixing holes 2813 to provide a more secure connection.

[0279] Figure 14 A seatbelt buffer mechanism 2800 according to an embodiment of the present disclosure is shown. Figure 13 Unlike other methods, 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. As the buffer member 2820 slides upward, the elastic member 2840 provides a cushioning force for the upward movement. Furthermore, 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 self-resets, causing the buffer member 2820 to drive the adjustment belt 2630 downward, thereby enabling the seat belt to be tightened again. According to this disclosure, the seat belt can be gently tightened to the initial position before emergency braking, ensuring the comfort of the child while ensuring the child's riding safety.

[0280] According to this disclosure, when the buffer 2820 is in the first position, the contact length between the seat belt assembly 2600 and the buffer 2820 (e.g., the length of the shoulder strap or adjustment strap wound around the buffer bar) is greater than the contact length between the seat belt assembly 2600 and the buffer 2820 when the buffer 2820 is in the second position. As the buffer 2820 moves from the first position to the second position, the lever arm between the adjustment strap and the buffer gradually decreases, and the cushioning force provided by the cushioning mechanism increases non-linearly, providing a cushioning effect for children with a small initial cushioning force and a large subsequent cushioning force; it can also advantageously save the length of the spring. In some embodiments, the guide 2830 is configured to be located between the first and second positions in the extending direction of the seat belt assembly 2600 to increase the difference in lever arm between the seat belt assembly and the buffer 2820 in the first and second positions. Optionally, when the buffer 2820 is in 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 in the second position.

[0281] Figure 15 An exploded view and a partial enlarged view of a child safety seat according to an embodiment of the present disclosure are shown.

[0282] In the lower perspective view, the seat belt length adjustment structure 2100, together with the adjustment strap 2630 passing through it, is separated from the seat 2200. The adjustment strap 2630 has a bent section 2631 for the seat belt buffer mechanism 2800 next to the seat belt length adjustment structure 2100.

[0283] The enlarged view shows an exploded view of the seatbelt buffer mechanism 2800, from which the through hole 2817 for the guide bar 2830, the elongated buffer groove 2816 for the buffer member 2820, and the spring-type elastic member 2840 can be seen more clearly. Furthermore, the mounting hole 2221 located under the seat portion 2200 for mounting the seatbelt buffer mechanism 2800 and the fastener 2850 disposed between the mounting hole 2221 and the fixing bracket 2810 can also be seen. The fastener 2850 passes through a fixing hole in the upper wall 2811 of the fixing bracket 2810. Figure 13-14 Secure the bracket 2810 to the seat 2200.

[0284] The partially exploded view further reveals the limiting pin 2860 and the buffer member 2820. The pin head 2861 of the limiting pin 2860 is spaced apart from the end side of the buffer member 2820, thus forming a sliding section for the buffer member 2820 to slide in the buffer groove 2816. Rod heads 2831 are provided at both ends of the guide rod 2830 to pivotally limit the guide rod 2830 within the through hole 2817.

[0285] Figure 16A lower perspective view and a partial enlarged view of a child safety seat according to another embodiment of the present disclosure are shown. The seat body 21 according to this embodiment and... Figure 8-15 The difference in the embodiment is the seatbelt buffer mechanism 2800; other components can be found in the following reference. Figure 8-15 Examples of implementations.

[0286] According to this embodiment, the adjustment strap 2630 extends from the rear side of the seat portion 2200 into the seat belt buffer mechanism 2800. The seat belt buffer mechanism 2800 includes a fixing frame 2810, a buffer rod 2820, a guide rod 2830 for changing the direction of the adjustment strap 2630, an elastic element 2840, and a fixing pin 2870 for fixing the elastic element 2840. The fixing frame 2810 includes two side walls 2812. Below the bottom wall 2212 of the opening 2210 for setting the seat belt length adjustment structure 2100, the side wall 2812 is provided with a forward-extending fixing pin support 2818 for pivotally supporting the fixing pin 2870. A corresponding buffer groove 2817 is provided in each side wall 2812. The buffer groove 2817 is elongated and parallel to the lower side of the seat 2200 to accommodate 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 beyond the side wall 2812 and form the hook part of the end of the elastic element 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 change direction after passing around the buffer rod 2820 and then change direction again after passing around the guide rod 2830, so that it can enter the seat belt length adjustment structure 2100 from the rear wall 2213 of the opening 2210.

[0287] Advantageously, the fixing bracket 2810 rests against the bottom wall 2212 and rear wall 2213 of the opening 2210 on one side. According to this embodiment, since the fixing pin support 2818 extends forward 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 element 2840 can be stretched a greater distance, thereby providing a greater elastic force cushioning effect. Furthermore, because the distance between the guide rod 2830 and the rear wall 2213 is shorter, the travel distance of the adjusting strap 2630 into the seatbelt length adjusting structure 2100 is shorter, which is beneficial for achieving a compact and efficient locking and cushioning effect.

[0288] Figure 17 A cross-sectional perspective view and a partial enlarged view of a child safety seat according to another embodiment of the present disclosure are shown. The cross-sectional perspective view is based on... Figure 16 It is cut along section line 2II-2II.

[0289] According to this embodiment, the adjustment belt 2630 first extends from the rear side of the seat 2200 to the buffer bar 2820, changes direction via the buffer bar 2820 to the guide bar 2830, then passes around the guide bar 2830 and is substantially parallel to the lower side of the seat 2200, enters the seat belt length adjustment structure 2100 from the adjustment belt inlet 2215 in the rear wall 2213 of the opening 2210, and finally extends from the front side of the seat 2200 via the adjustment belt outlet 2261.

[0290] Figure 17 In this configuration, the buffer bar 2820 is located at the far left of the buffer groove 2816, indicating the normal operating state where the seatbelt is not suddenly tightened. During, for example, an emergency braking event, the child's forward movement causes the seatbelt to move suddenly, pulling the adjusting strap 2630 connected to the seatbelt backward. This causes the buffer bar 2820 to move backward along the buffer groove 2816. At this time, one end of the elastic element 2840 hanging on the head of the buffer bar 2820 also moves backward, stretching the elastic element 2840 and gradually increasing the elastic force, thus cushioning the backward movement of the buffer bar 2820. Due to the restriction imposed by the buffer bar 2820, the movement speed of the adjusting strap 2630 is slowed down.

[0291] Fasteners 2850 can also be seen at the upper wall 2811 of the mounting bracket 2810, which are used to fix the mounting bracket 2810 to the mounting part 2210 of the seat 2200.

[0292] Figure 18 A cross-sectional side view and a partial enlarged view of a child safety seat according to another embodiment of the present disclosure are shown. Figure 18 The components in the middle correspond to Figure 17 .

[0293] The fixing pin 2870 and the buffer bar 2820 are at approximately the same height, while the guide bar 2830 is positioned higher than the buffer bar 2820, essentially at the same height as the fixing seat 2120. The adjusting strap 2630 continuously wraps around the buffer bar 2820 and the guide bar 2830, forming a Z-shaped bend 2631 after two directional reversals, allowing the adjusting strap 2630 to enter the seat belt length adjusting structure 2100 at the height of the fixing seat 2120.

[0294] According to this embodiment, the adjustment strap 2630 experiences less resistance between the seat belt length adjustment structure 2100 and the seat belt buffer mechanism 2800, making it less prone to jamming. Users can adjust the strap with minimal force. Furthermore, even when the locking block 2110 of the seat belt length adjustment structure 2100 locks the adjustment strap 2630, the Z-shaped bend 2631 of the adjustment strap 2630 provides a longer adjustment margin. This allows the adjustment strap 2630 to provide this adjustment margin when the child's body lurches forward during vehicle braking or emergencies, enabling the seat belt to better adapt to the child's forward movement and preventing the seat belt from constricting the child.

[0295] from Figure 18 It can also be seen that the fixing bracket 2810 is closely attached to the rear wall 2213 and bottom wall 2212 of the opening 2210 of the seat 2200, thereby forming a shape that matches the rear wall 2213 and bottom wall 2212, which makes the overall structure of the seat belt length adjustment structure 2100 and the seat belt buffer mechanism 2800 more compact and efficient.

[0296] Figure 19 A perspective view and a partial enlarged view of a lower cross-sectional section of a child safety seat according to another embodiment of the present disclosure are shown.

[0297] According to this embodiment, in the event of an emergency braking of the vehicle, the rearward movement of the adjusting belt 2630 causes the buffer rod 2820 to slide to its rightmost end within the buffer groove 2816. During this sliding process, the elastic element 2840 is stretched, and the elastic force continuously increases, buffering the rearward movement of the buffer rod 2820. At this time, the elastic element 2840 is stretched to its maximum length. After the emergency braking is released, the elastic force of the elastic element 2840 helps the adjusting belt 2630 and the seat belt connected to the adjusting belt 2630 return to their normal working position. During the return of the adjusting belt 2630, the rotatable guide rod 2830 advantageously hinders the return speed of the buffer element 2820 to avoid the adverse effects caused by the seat belt returning too quickly.

[0298] Figure 20 A cross-sectional side view and a partial enlarged view of a child safety seat according to another embodiment of the present disclosure are shown. Figure 20 The components corresponding to Figure 19 .

[0299] Adjusting band 2630 at guide rod 2830 and buffer rod 2820 from Figure 18 The Z-shaped bend segment 2631 is transformed into Figure 20As shown in the diagram, the allowance previously reserved in the adjusting strap 2630 is used to cushion the seatbelt. According to one embodiment, in this state, the portion of the adjusting strap 2630 between the guide bar 2830 and the buffer bar 2820 is advantageously substantially perpendicular to the adjacent portions, thereby achieving better mechanical action.

[0300] Figure 21 A perspective view of a seatbelt buffer mechanism 2800 according to another embodiment of the present disclosure is shown. The position of the buffer bar 2820 corresponds to... Figure 16 , 17 18.

[0301] The fixing bracket 2810 consists of an upper wall 2811 and two side walls 2812 perpendicular to the upper wall 2811. The side walls 2812 have forward-extending fixing pin supports 2818, thus forming a notch 2818. In conjunction with the preceding explanation, the edge of the notch 2818 abuts against the rear wall 2213 and bottom wall 2212 of the opening 2210 of the seat portion 2200. The notch 2818 is rectangular, but can also be adapted to have other shapes for the rear wall 2213 and bottom wall 2212.

[0302] The elastic element 2840 is, for example, a tension spring, with loops formed at both ends. One loop of the tension spring engages with the engagement portion of the fixing pin 2760, defined by the pin head 2871 and the side wall 2812. The pin head 2871 has a diameter larger than the loop to prevent the tension spring from detaching from the fixing pin 2760. The other loop of the tension spring engages with the engagement portion of the buffer rod 2820, defined by the rod head 2821 and the side wall 2812. The rod head 2871 also has a diameter larger than the loop to prevent the tension spring from detaching from the buffer rod 2820. In this configuration, the elastic element 2840 is advantageously unloaded, i.e., in a relaxed state. The elastic element 2840 can also be slightly stretched, thereby providing stability through its elastic force under normal use of the seatbelt.

[0303] The guide rod 2830 is similar in form to the retaining pin 2870, but shorter in length. 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.

[0304] Figure 22 A seatbelt buffer mechanism according to another embodiment of this disclosure is shown. The position of the buffer bar 2820 corresponds to... Figure 19 , 13 .

[0305] and Figure 21In contrast, the buffer bar 2820 is located at the rightmost end of the buffer groove 2816, and the elastic element 2840 is stretched to its maximum length, at which point the vehicle is in an emergency braking or impact situation. The elastic element 2840 provides a buffering force to prevent the buffer adjustment band 2630 from moving backward, and after the emergency situation disappears, the adjustment band 2630 can automatically return to its normal position as the buffer bar 2820 slides in the buffer groove 2816.

[0306] Figure 23 A lower perspective view and a partial enlarged view of a child safety seat according to another embodiment of the present disclosure are shown.

[0307] In the lower perspective view, the seat belt length adjustment structure 2100, together with the adjustment strap 2630 passing through it, is separated from the seat 2200. The adjustment strap 2630 has a bent section 2631 for the seat belt buffer mechanism 2800 next to the seat belt length adjustment structure 2100.

[0308] The enlarged view shows an exploded view of the seatbelt buffer mechanism 2800, from which the through hole 2817 for the guide rod 2830, the through hole 2817 for the fixing pin 2870, the elongated buffer groove 2816 for the buffer member 2820, and the elastic member 2840 in the form of a tension spring can be seen more clearly. Furthermore, the mounting hole 2221 located on the underside of the seat 2200 for mounting the seatbelt buffer mechanism 2800, and the fastener 2850 disposed between the mounting hole 2221 and the fixing bracket 2810, can also be seen. The fastener 2850 passes through a fixing hole in the upper wall 2811 of the fixing bracket 2810, firmly fixing the fixing bracket 2810 to the seat 2200.

[0309] According to this 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. It also includes a guide rod 2830 through which the seat belt passes. Under the action of the elastic member 2820, the buffer member 2820 always presses against the adjustment band 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 cause the seat belt to be tightened. When the seat belt is tightened, it must overcome the elastic force of the elastic member 2820, thereby achieving buffering when the seat belt is tightened and avoiding the seat belt from strangling the child and causing injury.

[0310] This disclosure solves the technical problem that existing seat belts lack cushioning function or have poor cushioning effect. Specifically, this disclosure utilizes a cushioning element 2820, an elastic element 2840, and a cushioning groove 2816 for the movement of the cushioning element 2820. This mechanism is relatively simple and easy to implement. Furthermore, the seat belt cushioning mechanism 2800 is located at the end of the seat belt near the adjusting strap 2630, ensuring that the distance between the part of the seat belt in contact with the child and the cushioning mechanism 2800 is relatively large, forming a longer lever arm. This enhances the cushioning effect when the seat belt is tightened.

[0311] The third aspect of this disclosure:

[0312] like Figure 24 As shown, one embodiment of this disclosure proposes a child vehicle (also referred to as a child safety seat according to the first and second aspects of this disclosure), such as a car safety seat, infant carrier, or stroller. The child vehicle includes a vehicle body 310 and a seatbelt assembly 320 mounted on the vehicle body 310. The seatbelt assembly 320 automatically locks after being tightened, thereby preventing the seatbelt assembly 320 from being over-tightened, which could affect the child's comfort or cause other safety hazards. The structure of this child vehicle will be described in detail below using a car safety seat as an example.

[0313] like Figure 24 As shown, the vehicle 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 seat belt assembly 320 is mounted on the vehicle body 310.

[0314] Specifically, such as Figures 24 to 26As shown, the seatbelt assembly 320 includes a shoulder strap assembly 3100, a crotch strap assembly 3200, an adjustment strap 3300, and a self-locking mechanism 3400. The shoulder strap assembly 3100 has a first end 3110 and a second end (not shown in the figures), the crotch strap assembly 3200 has a third end 3210 and a fourth end 3220, and the adjustment strap 3300 has a fifth end 3310 and a sixth end (not shown in the figures). The third end 3210 of the crotch strap assembly 3200 is connected to the vehicle body 310, and the fourth end 3220 of the crotch strap assembly 3200 is detachably connected to the first end 3110 of the shoulder strap assembly 3100. The fifth end 3310 of the adjustment strap 3300 is connected to the vehicle body 310, and the sixth end of the adjustment strap 3300 is connected to the second end of the shoulder strap assembly 3100. The adjustment strap 3300 is switchable between a tightened state and a slack state. The self-locking mechanism 3400 is located between the fifth end 3310 and the sixth end of the adjusting belt 3300. The adjusting 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 assembly 3200 is connected to the first end 3110 of the shoulder strap assembly 3100 and the adjusting belt 3300 is in a taut state, the shoulder strap assembly 3100 is in a taut and fully engaged state. The self-locking mechanism 3400 locks the adjusting belt 3300 to restrict the movement of the adjusting belt 3300 and the shoulder strap assembly 3100.

[0315] In the aforementioned seat belt assembly 320, the third end 3210 of the crotch strap assembly 3200 is connected to the vehicle body 310, the fourth end 3220 is connected to the first end 3110 of the shoulder strap assembly 3100, the second end of the shoulder strap assembly 3100 is connected to the sixth end of the adjustment strap 3300, and the fifth end 3310 of the shoulder strap assembly 3100 is connected to the vehicle body 310, thus forming a restraint structure that can secure a child to the vehicle body 310. A self-locking mechanism 3400 is provided between the third end 3210 and the fourth end 3220 of the adjustment strap 3300, and the adjustment strap 3300 passes through the self-locking mechanism 3400 and is linked to 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 strap 3300 is in a taut state, the shoulder strap assembly 3100 is in a taut position. The self-locking mechanism 3400 can lock the adjustment strap 3300 to restrict the movement of the adjustment strap 3300 and the shoulder strap assembly 3100, so that the shoulder strap assembly cannot be further tightened, thereby avoiding the safety belt assembly 320 being over-tightened, which would affect the comfort of the child or cause other safety hazards.

[0316] Specifically, such as Figure 24As shown, there are two shoulder strap assemblies 3100, spaced apart on the left and right sides of the carrier body 310. The two shoulder strap assemblies 3100 are used to restrain the child's shoulders. In this embodiment, each shoulder strap assembly 3100 includes an interconnected shoulder strap body 3120 and a shoulder strap buckle 3130, with the buckle 3130 located at the first end 3110 of the shoulder strap assembly 3100. There is one crotch strap assembly 3200, which is used to restrain the child's hips. The crotch strap assembly 3200 includes an interconnected crotch strap body 3230 and a crotch strap buckle 3240 (see...). Figure 32 , Figure 25 (Not shown in the image), the crotch strap buckle 3240 is located at the fourth end 3220 of the crotch strap assembly 3200. The shoulder strap buckles 3130 of the two shoulder strap assemblies 3100 can be detachably fastened to the crotch strap buckle 3240 to facilitate child access to and from the seating space 313. The fifth end 3310 of the adjusting strap 3300 is connected via a length adjustment mechanism 3700 (see [link]). Figure 25 The adjustment strap 3300 is fixed to the front end of the seat portion 311 and located in front of the crotch strap assembly 3200. The other end of the adjustment strap 3300 wraps around the bottom surface of the seat portion 311 and extends to the back of the backrest portion 312 to connect with the second ends of the two shoulder strap assemblies 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.

[0317] It is worth noting that the directional terms related to front, back, left, and right mentioned in the context of this application are based on... Figure 24 The orientation of the car safety seats shown is for reference only. Specifically, the direction the child faces after sitting in the car safety seat is considered front, the direction the child turns away from is considered back, the left side of the reader when facing the car safety seat is considered left, and the right side of the reader when facing the car safety seat is considered right.

[0318] Optionally, the self-locking mechanism 3400 can take various forms. For example, in the first embodiment, such as... Figures 25 to 29 As shown, the self-locking mechanism 3400 may include a mounting base 3410, a drive member 3420, a locking member 3430, a fixing bracket 3440, and a first reset member 3451. In this embodiment, the crotch strap body 3230 of the crotch strap assembly 3200 is made of a rigid material such as plastic.

[0319] Specifically, such as Figures 26 to 29As shown, the mounting base 3410 is fixed to the carrier body 310. A receiving cavity 311a can be provided within the seat portion 311, and the mounting base 3410 is disposed within this receiving cavity 311a. The seat portion 311 also has an opening 111b that communicates with the receiving cavity 311a. The mounting base 3410 includes a winding portion 3411 and a mounting portion 3412 connected to each other, with the winding portion 3411 located on the front side of the mounting portion 3412. The front side of the winding portion 3411 has an arc-shaped outer wall 34111 and a first limiting rod 34112 spaced apart from the outer wall 34111. A first through-hole 34113 is formed between the outer wall 34111 and the first limiting rod 34112 for the adjustment belt 3300 to pass through. The mounting portion 3412 has a first mounting groove 34121 with the groove facing upwards. In this embodiment, the first mounting groove 34121 is approximately a rectangular groove.

[0320] Specifically, such as Figures 27 to 29 As shown, the driving member 3420 is movably disposed within the first mounting groove 34121. The driving member 3420 includes a driving body 3421 and a driving protrusion 3422 connected to each other. The driving protrusion 3422 is located on the rear side of the driving body 3421 and protrudes from the upper surface of the driving body 3421. The driving body 3421 has a third mounting groove 34211 with the opening facing upward. In this embodiment, the third mounting groove 34211 is generally 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.

[0321] Furthermore, such as Figures 27 to 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 engaged 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.

[0322] Furthermore, such as Figures 27 to 29As shown, the fixing frame 3440 is fixed to the carrier body 310. Specifically, the fixing frame 3440 is disposed within the accommodating cavity 311a and fixedly connected to the fixing seat 3800. The fixing frame 3440 includes a frame body 3441 and a first fixing part 3442 and a second fixing part 3443 disposed 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 fitted onto the left and right sides of the mounting part 3412 of the mounting seat 3410, and the through groove 34411 is opposite to and communicates with the opening of the first mounting groove 34121. In other words, the frame body 3441 covers the mounting part 3412. The left and right sides of the frame body 3441 can be fixed to the two sides of the mounting part 3412 by two fasteners (such as screws or rivets). A limiting part 34412 is formed at the front of the frame body 3441. Two first fixing parts 3442 are protruding from the upper side of the frame body 3441, and one second fixing part 3443 is located on the rear side of the frame body 3441. The fixing bracket 3440 can be further fixedly connected to the seat part 311 by providing fasteners that pass through the second fixing part 3443 and the seat part 311.

[0323] Furthermore, such as Figure 25 and Figure 26 As shown, the locking member 3430 is in the first position near the limiting part 34412 (see...) Figure 26 ) and the second position away from the limiting part 34412 (see Figure 25 The locking member 3430 and the limiting part 34412 are movable. A pull gap 3101 is formed between the locking member 3430 and the limiting part 34412. The adjusting band 3300 is at least partially disposed in the pull gap 3101. When the locking member 3430 moves from the second position to the first position, the pull gap 3101 becomes smaller to restrict the movement of the adjusting band 3300.

[0324] Furthermore, such as Figure 25 and Figure 26 As shown, the crotch belt assembly 3200 is in the tensioned state (see...). Figure 26 ) and relaxed state (see Figure 25 The 3200 can be switched between the relaxed and the tightened states. When the 3200 shifts from the relaxed state to the tightened state, it can move the drive component 3420, causing the drive component 3420 to move the locking component 3430 to the first position.

[0325] Furthermore, such as Figure 25 and Figure 26As shown, the seat belt assembly 320 also includes a rotating seat 3500. The rotating seat 3500 is rotatably disposed on the vehicle body 310 and connected to the third end 3210 of the crotch belt assembly 3200. Specifically, the rotating seat 3500 includes a generally cylindrical rotating disk 3510 and a connecting rod 3520 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 parts 3442 of the fixing frame 3440 extend into the fixed seat 3800. The rotating disk 3510 is located between the two first fixing parts 3442, and the rotating disk 3510 is pivotally connected to the two first fixing parts 3442 of the fixing frame 3440 through a pivot shaft 3102 passing through its central axis, that is, the rotating disk 3510 can rotate relative to the fixing frame 3440. The 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. The rotating seat 3500 is in the first rotating position (see...). Figure 26 ) and second rotation position (see Figure 25 The rotating seat 3500 is rotatable between the rotating disk 3510 and the connecting rod 3520. The rotating seat 3500 has a pushing protrusion 3511 on its outer periphery, which is spaced apart from the connecting rod 3520. Its driving member 3420 has a driving protrusion 3422. When the belt assembly 3200 is in a tensioned state, the rotating seat 3500 is in a first rotational position, and the pushing protrusion 3511 pushes the driving protrusion 3422 to cause the driving member 3420 to move the locking member 3430 to the first position. When the belt assembly 3200 is in a relaxed state, the rotating seat 3500 is in a second rotational position, and the pushing protrusion 3511 and the driving protrusion 3422 are spaced apart.

[0326] Furthermore, such as Figures 27 to 29 As shown, the first reset member 3451 is a spring. The first reset member 3451 is disposed within the first mounting groove 34121, and its two ends abut against the driving member 3420 and the mounting base 3410, respectively. The first reset member 3451 constantly causes the driving member 3420 to move the locking member 3430 to the second position. Specifically, the front sidewall of the driving body 3421 is provided with a first sleeve protrusion 34213. One end of the first reset member 3451 is sleeved on the first sleeve protrusion 34213 and abuts against the front sidewall of the driving body 3421, while the other end abuts against the groove wall of the first mounting groove 34121. This prevents the first reset member 3451 from shifting during deformation. In this embodiment, there are two first reset members 3451, spaced apart along the left-right direction of the driving body 3421, to provide a more balanced elastic force to the driving member 3420.

[0327] The following describes in detail the winding method of the adjustment band 3300 in the self-locking mechanism 3400 in this embodiment:

[0328] like Figure 24 and Figure 28 As shown, the fifth end 3310 of the adjustment strap 3300 is fixed to the seat part 311 by the length adjustment mechanism 3700. The sixth end of the adjustment strap 3300 extends into the receiving cavity 311a through the opening 111b, and then enters the first mounting groove 34121. After passing around the locking member 3430, it extends out of the first mounting groove 34121 through the pulling gap 3101 and passes around the arc-shaped outer wall 34111 of the winding part 3411 of the mounting seat 3410, and extends to the rear of the backrest part 312 to connect with the second end of the shoulder strap assembly 3100.

[0329] Thus, when the shoulder strap buckle 3130 and the hip strap buckle 3240 are not fastened, or when the adjusting strap 3300 is in a loose state, such as Figure 25 As shown, the rotating seat 3500 is in the second rotating position. The pushing protrusion 3511 and the driving protrusion 3422 are spaced apart. Under the elastic force of the first reset member 3451, the driving member 3420 drives the locking member 3430 to move to the second position away from the limiting part 34412. At this time, the pulling gap 3101 between the locking member 3430 and the limiting part 34412 is large, and the adjusting strap 3300 provided in the pulling gap 3101 can move freely. When the child sits on the vehicle body 310, the shoulder strap buckle 3130 and the crotch strap buckle 3240 can be fastened, and the adjusting strap 3300 can be pulled to a suitable length. When the adjusting strap 3300 is pulled, it will drive the shoulder strap assembly 3100, which in turn drives the crotch strap assembly 3200 that is fastened to it, so that the rotating seat 3500 rotates. When the restraint structure, in which the adjusting belt 3300, shoulder strap assembly 3100, and crotch strap assembly 3200 are connected in sequence, is in a taut state, the rotating seat 3500 rotates from the second rotation position to the first rotation position along the first direction 3D1, as follows: Figure 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, causing the driving member 3420 to move along the second direction 3D2 and drive the locking member 3430 to move to the first position. The pulling gap 3101 becomes smaller, and the adjusting strap 3300 is restricted between the limiting part 34412 and the locking member 3430 and cannot move. At this time, if the adjusting strap 3300 is forcibly tightened, that is, the length of the adjusting strap 3300 is shortened, the pulling gap 3101 will become smaller and smaller, and the adjusting strap 3300 will be further clamped between the limiting part 34412 and the locking member 3430, so that the user cannot pull the adjusting strap 3300. This avoids the seat belt assembly 320 being over-tightened, which would affect the comfort of the child or cause other safety hazards.

[0330] In the second embodiment, as Figures 30 to 34As shown, the self-locking mechanism 3400 may also include a mounting base 3410, a driving member 3420, a locking member 3430, a fixing frame 3440, a pushing member 3460, a first reset member 3451, a second reset member 3452, a first guide rod 3471, a second guide rod 3472, and a limiting pin 3473. In this embodiment, the crotch strap body 3230 of the crotch strap assembly 3200 can be made of either a rigid material such as rubber or a flexible material such as nylon.

[0331] Furthermore, such as Figures 32 to 34 As shown, the structure and function of the mounting base 3410, driving member 3420, locking member 3430, and 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 in the previous embodiment, except that the left and right sides of the frame body 3441 of the fixing frame 3440 in this embodiment do not have through holes for fasteners to pass through, but instead, three through holes are provided on each of the left and right sides of the frame body 3441 for the first guide rod 3471, the second guide rod 3472, and the limiting pin 3473 to pass through.

[0332] Furthermore, such as Figures 32 to 34 As shown, in this embodiment, the seat belt assembly 320 may not include the rotating seat 3500; instead, the flexible crotch strap body 3230 is directly wound and fixed to a pin 3600 pivotally connected between the two first fixing parts 3442. Of course, the crotch strap body 3230 in this embodiment may also be the same as that in the first embodiment, that is, a rigid crotch strap body 3230 rotatably disposed on the seat part 311 via the rotating seat 3500.

[0333] Furthermore, such as Figures 32 to 34As shown, the pusher 3460 is movably disposed in the first mounting groove 34121 of the mounting base 3410, that is, the pusher 3460 can move relative to the mounting base 3410 and the fixing frame 3440. In this embodiment, the pusher 3460 includes a pressing part 3461 and a winding end 3462 connected to each other, and a second limiting rod 3463 spaced apart from the winding end 3462. The pusher 3460 can move relative to the fixing frame 3440 between a third position and a fourth position, the pressing part 3461 abuts against the drive member 3420, and the adjusting 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 intersecting. In this embodiment, the moving direction of the driving member 3420 is along the front-rear direction of the vehicle body 310 (i.e., the first direction 3D1 and its opposite direction), and the moving direction of the pushing member 3460 is along the up-down direction of the vehicle body 310 (i.e., the second direction 3D2 and its opposite direction). That is, the moving direction of the driving member 3420 is perpendicular to the moving direction of the pushing member 3460. When the adjusting belt 3300 switches from a slack state to a taut state, the adjusting belt 3300 pushes the winding end 3462, causing the pushing member 3460 to move from the fourth position (see...) Figure 30 Move to the third position (see) Figure 31 The pushing part 3461 pushes the driving member 3420 to move the locking member 3430 to the first position.

[0334] Specifically, the driving member 3420 and the pushing member 3460 are arranged along the front-rear direction of the vehicle body 310, that is, the driving member 3420 is located on the first direction 3D1 of the pushing member 3460. There are two pushing parts 3461, which are spaced apart along the left-right direction of the vehicle 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 on the second direction 3D2 of the pushing plane 34612 and 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 mating inclined surface 34214 and a mating plane 34215. The mating inclined surface 34214 is located on the first direction 3D1 of the mating plane 34215 and is inclined in the first direction 3D1 relative to the mating plane 34215. When the drive member 3420 is in the third position, the pushing inclined surface 34611 abuts against the mating inclined surface 34214. When the drive member 3420 moves from the third position to the fourth position along the first direction, the pushing plane 34612 abuts against the pushing inclined surface 34611.

[0335] In this embodiment, as Figures 32 to 34As shown, the winding end 3462 has an arc-shaped winding surface 34621. The first limiting rod 34112 is spaced apart from the winding surface 34621 and located below the winding surface 34621. A second through-hole 3464 is formed between the winding surface 34621 and the second limiting rod 3463 for the adjustment band 3300 to pass through. The mounting portion 3412 of the mounting base 3410 is also provided with through holes 34122 on the left and right sides that can communicate with the first mounting groove 34121. The pusher 3460 has a hollow structure and a through groove 3465 inside. The through groove 3465 extends along the direction 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 movement stroke of the pusher 3460.

[0336] Furthermore, such as Figures 32 to 34 As shown, the second reset member 3452 constantly moves the pusher 3460 to the fourth position. Specifically, the pusher 3460 is provided with a second mounting groove 3466, and the second reset member 3452 is disposed in the second mounting groove 3466. In this embodiment, the second mounting groove 3466 is located between the two pushing parts 3461 and communicates with the through groove 3465. The second mounting groove 3466 is generally arranged along the vertical 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 protrusion 3467. One end of the second reset member 3452 is sleeved on the second sleeve protrusion 3467 and abuts against the bottom of the second mounting groove 3466, and the other end of the second reset member 3452 abuts against the fixing frame 3440.

[0337] Furthermore, such as Figures 32 to 34 As shown, the first guide rod 3471 and the second guide rod 3472 are located on both sides of the pusher 3460. Specifically, the first guide rod 3471 and the second guide rod 3472 extend approximately along the left-right direction of the carrier body 310, i.e., 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 positioned 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 fixed to the fixing frame 3440 by passing through the through holes on the left and right sides of the frame body 3441, and both the first guide rod 3471 and the second guide rod 3472 are located below the mounting base 3410.

[0338] The following describes in detail the winding method of adjustment belt 3300 in self-locking mechanism 3400:

[0339] like Figures 30 to 32As shown, the fifth end 3310 of the adjustment strap 3300 is fixed to the seat part 311 by the length adjustment mechanism 3700. The sixth end of the adjustment strap 3300 extends into the receiving cavity 311a through the opening 111b, then enters the first mounting groove 34121, passes through the locking member 3430, extends out of the first mounting groove 34121 through the pulling gap 3101, and passes around the arc-shaped outer wall 34111 of the winding part 3411 of the mounting base 3410, and then passes through... The arc-shaped winding surface 34621 of the winding end 3462 of the pusher 3460 passes through the gap between the first guide rod 3471 and the bottom of the mounting base 3410, and then passes through the second through hole 3464 between the winding surface 34621 and the second limiting rod 3463. After passing through the gap between the second guide rod 3472 and the bottom of the mounting base 3410, it extends to the rear of the backrest 312 to connect with the second end of the shoulder strap assembly 3100.

[0340] Thus, when the shoulder strap buckle 3130 and the hip strap buckle 3240 are not fastened, or when the adjusting strap 3300 is in a loose state, such as Figure 30 As shown, the adjusting band 3300 does not press against the pushing member 3460. Under the elastic force of the second reset member 3452, the pushing member 3460 is in the fourth position, and the pushing inclined surface 34611 of the pushing member 3460 abuts against the mating inclined surface 34214 of the driving member 3420. As mentioned above, since the pushing inclined surface 34611 is located on 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 driving member 3420 is in the relatively rearward second position 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 part 34412 is large, and the adjusting band 3300 provided in the pulling gap 3101 can move freely.

[0341] After the child sits on the vehicle body 310, the shoulder strap buckle 3130 and the crotch strap buckle 3240 can be fastened together. The adjustment strap 3300 can be pulled to the appropriate length. When the adjustment strap 3300 is pulled, it will press against the winding end 3462 of the pusher 3460, causing the pusher 3460 to move in the second direction 3D2. This causes the pusher inclined surface 34611 to gradually move upward and disengage from the mating inclined surface 34214. Then, the pusher plane 34612 pushes against the mating inclined surface 34214 until it disengages from the mating inclined surface 34214 and abuts against the mating plane 34215. During this process, the second reset member 3452 is compressed and deformed. As mentioned above, the mating ramp 34214 is located on the mating plane 34215 in the first direction 3D1, and the mating ramp 34214 is inclined relative to the mating plane 34215 in the first direction 3D1. Therefore, it is equivalent to the pusher 3460 pushing the drive member 3420 to the first position in the first direction 3D1, while the first reset member 3451 is compressed and deformed. The pulling gap 3101 becomes smaller, and the adjustment strap 3300 is restricted between the limiting part 34412 and the locking member 3430 and cannot move. If the adjustment strap 3300 is forcibly tightened at this time, that is, the length of the adjustment strap 3300 is shortened, the pulling gap 3101 will become smaller and smaller, and the adjustment strap 3300 will be further clamped between the limiting part 34412 and the locking member 3430, so that the user cannot pull the adjustment strap 3300. This avoids the seat belt assembly 320 being over-tightened, which would affect the comfort of the child or cause other safety hazards.

[0342] The aforementioned seat belt assembly 320 and child vehicle have at least the following technical effects:

[0343] In the aforementioned seat belt assembly 320, the third end 3210 of the crotch strap assembly 3200 is connected to the vehicle body 310, the fourth end 3220 is connected to the first end 3110 of the shoulder strap assembly 3100, the second end of the shoulder strap assembly 3100 is connected to the sixth end of the adjustment strap 3300, and the fifth end 3310 of the shoulder strap assembly 3100 is connected to the vehicle body 310, thus forming a restraint structure that can secure a child to the vehicle body 310. A self-locking mechanism 3400 is provided between the third end 3210 and the fourth end 3220 of the adjustment strap 3300, and the adjustment strap 3300 passes through the self-locking mechanism 3400 and is linked to 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 strap 3300 is in a taut state, the self-locking mechanism 3400 can lock the adjustment strap 3300 to limit the movement of the adjustment strap 3300, thereby preventing the seat belt assembly 320 from being over-tightened, which would affect the comfort of the child or cause other safety hazards.

[0344] Since this application can be embodied in various forms without departing from the spirit and substance of this application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted in the broadest sense within the scope defined by the claims. Therefore, all variations falling within the scope of the claims or their equivalents should be covered by the claims.

Claims

1. A seat belt length adjustment device (1100) for a child safety seat (11), characterized in that, include: The adjustment belt (1630) has a connecting section (1632) located inside the child safety seat (11) and an adjustment section (1631) extending from the outside of the child safety seat (11), the connecting section (1632) being connected to the seat belt (1610); A locking element, disposed on the child safety seat (11) and fitted onto the adjustment section (1631) of the adjustment strap (1630), operably locks the adjustment strap (1630); and A vertical roller (1810) is located on the side of the adjusting section (1631) of the adjusting belt (1630) in the width direction. The vertical roller (1810) includes a first vertical roller and a second vertical roller. The first vertical roller and the second vertical roller are located on both sides of the width direction of the adjusting belt (1630), and the distance between the first vertical roller and the second vertical roller is greater than the width of the adjusting belt (1630).

2. The seat belt length adjustment device (1100) according to claim 1, characterized in that: The vertical roller (1810) is closer to the end of the adjusting section (1631) than the locking member.

3. A child safety seat (11), characterized in that, include: A seat (1200) having an opening (1210) including a bottom wall (1212) and a side wall (1214) perpendicular to the bottom wall (1212); Seat belt (1610); and A seatbelt length adjustment device (1100) is provided at the opening (1210). The seat belt length adjustment device (1100) includes: An adjustment belt (1630) having a connecting section (1632) located inside the seat (1200) and an adjustment section (1631) outside the seat (1200), the connecting section (1632) connecting to the seat belt (1610), the adjustment section (1631) extending out of the seat (1200) from the opening (1210), the edge of the adjustment section (1631) facing the sidewall (1214) of the opening (1210); and A vertical roller (1810) is located between the side wall (1214) and the adjusting belt (1630).

4. The child safety seat (11) according to claim 3, characterized in that: The vertical roller (1810) includes a first vertical roller and a second vertical roller, which are located on both sides of the width direction of the adjusting belt (1630), and the distance between the first vertical roller and the second vertical roller is greater than the width of the adjusting belt (1630).

5. The child safety seat (11) according to claim 4, characterized in that: The seat belt length adjustment device (1100) further includes a locking member, which is disposed at the opening (1210) and sleeved on the adjustment section (1631) of the adjustment belt (1630) to operably lock the adjustment belt (1630). The vertical roller (1810) is closer to the end of the adjusting section (1631) than the locking member.

6. The child safety seat (11) according to claim 5, characterized in that, The locking element includes: A fixing seat (1120) is fixed at the opening (1210) of the seat (1200); and A locking block (1110) is pivotally connected to the fixed base (1120), the locking block having a release part (1112) for unlocking; When the locking member locks the adjusting band (1630), the adjusting band (1630) is clamped between the fixing seat (1120) and the locking block (1110).

7. The child safety seat (11) according to claim 6, characterized in that, The seat belt length adjustment device (1100) also includes a cover (1130); The cover (1130) is fixed at the opening (1210) to cover the vertical roller (1810); The cover (1130) and the opening (1210) are configured to form an adjustment band hole and a release hole; the adjustment band hole and the release hole are spaced apart, the adjustment section (1631) passes through the adjustment band hole, and the release part (1112) is exposed outside the cover (1130) through the release hole.

8. The child safety seat (11) according to claim 7, characterized in that, The cover (1130) includes an outlet (1132) and a covering (1131) connected to the outlet (1132), the height of the outlet (1132) being lower than the height of the covering (1131); the outlet (1132) covers the vertical roller (1810), and the covering (1131) partially covers the locking block (1110); the covering (1131) forms a clearance space for the pivoting movement of the locking block (1110).

9. The child safety seat (11) according to claim 7, characterized in that, The vertical roller (1810) is pivotally connected to at least one of the seat (1200) and the cover (1130) by vertical rivets (1811).

10. The child safety seat (11) according to claim 5, characterized in that: The seat belt length adjustment device (1100) further includes a transverse roller (1820), wherein, The transverse roller (1820) extends along the width direction of the adjustment section (1631), and the transverse roller (1820) and the bottom wall (1212) are respectively located on both sides of the thickness direction of the adjustment band (1630); The transverse roller (1820) is located between the vertical roller (1810) and the locking member, and the projection of the transverse roller (1820) on the side wall (1214) coincides with the projection of the vertical roller (1810) on the side wall (1214). The length of the transverse roller (1820) is less than the distance between the rotation axis of the first vertical roller and the rotation axis of the second vertical roller.

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