Child safety seat

Abstract

The present application provides a child safety seat, comprising: a seat body for carrying a child; a connecting portion provided on the seat body; a tether assembly, one end of which is fixed to the connecting portion, and the other end of which is provided with an anchoring portion for connecting to a vehicle seat; and a second lock-off device provided on the connecting portion and configured for operably locking a safety belt of the vehicle.

Description

Child safety seats Technical Field

[0001] This disclosure relates to a child safety seat. Background Technology

[0002] Child safety seats are typically secured to the vehicle seat via the seatbelt and top tether for the convenience of children during travel. When the vehicle comes to a sudden stop, the webbing of the tether may break, or the connection point to the tether may be damaged, posing a risk of the child safety seat tipping forward.

[0003] Child safety seats have multiple adjustable mechanisms to accommodate larger or smaller passengers, such as adjustable headrests, seat recline angles, and adjustable seat belts. Generally, child safety seats have an adjustment mechanism for the crotch belt to adjust its length, thus making it suitable for children of various ages and sizes. However, existing crotch belt adjustment structures are complex and inconvenient to operate. Therefore, there is a need for a new crotch belt adjustment mechanism that allows for simple and convenient adjustment of the crotch belt length. Summary of the Invention

[0004] The first embodiment of this disclosure provides a child safety seat, comprising: a seat body for carrying a child; a connecting portion disposed on the seat body; a strap assembly, one end of which is fixed to the connecting portion and the other end of which is provided with an anchoring portion for connecting to a vehicle seat; and a second clamp disposed on the connecting portion for operably locking the vehicle's seat belt.

[0005] According to one embodiment, the seat body includes a seat and a backrest, with a connecting portion protruding from the top of the backrest. The backrest includes a first clamp located on the front or side of the backrest for operably locking the seat belt.

[0006] According to one embodiment, the connecting part is an elongated rod with its two ends connected to the reinforcing tubes inside the seat body. The second clamp is one unit, located in the middle of the connecting part; or the second clamp is two units, located at both ends of the connecting part.

[0007] According to one embodiment, the second clamp includes: a clamp seat disposed on the connecting portion; a clamp arm pivotally disposed on the clamp seat; and an engaging member movably disposed between the clamp seat and the clamp arm, the engaging member having a locked position and an unlocked position, wherein when the engaging member is in the locked position, the engaging member locks the clamp arm on the clamp seat, thereby clamping the seat belt within the second clamp.

[0008] According to one embodiment, the second clamp further includes: a release operation member movably disposed on the clamp seat or clamp arm, the release operation member being arranged in conjunction with the engaging portion to drive the engaging portion to move between a locked position and a release position; and an elastic member that applies a biasing force to the engaging portion toward the locked position.

[0009] According to one embodiment, the release operation member and the engaging member are pivotally connected to the clamping arm. The engaging member has a protruding abutment portion, and the release operation member has a U-shaped driving rib. The abutment portion engages with the driving rib so that the release operation member and the engaging member move as a whole. An elastic member is located between the release operation member and the clamping arm. Under the bias pressure of the elastic member, the release operation member pushes the engaging member in the locking position direction.

[0010] According to one embodiment, one of the clamping arm and the clamping seat is provided with a rib, and the other is provided with a groove for receiving the rib, the rib being formed with a toothed structure.

[0011] According to one embodiment, the second clamp further includes two connectors that connect the second clamp and the connecting portion respectively. The clamp seat is arc-shaped, and a gap is formed between the clamp seat, the two connectors and the connecting portion, thereby limiting the strap assembly in the connecting portion.

[0012] According to one embodiment, the seat body includes a seat for carrying a child; a backrest connected to the seat for supporting the child's back; and two side wings connected to the sides of the backrest respectively, wherein the seat belt fixing part includes a first clamp for operably locking the seat belt, the first clamp being disposed on the side wings or the backrest, and a connecting part being disposed on the top of the backrest or the side wings.

[0013] According to one embodiment, the side wing includes a through portion that extends along the seat height direction on the side wing for threading a seat belt. A first clamp is disposed at the top of the through portion, and a protrusion for guiding the seat belt is provided at the bottom of the through portion. The first clamp includes a fixed seat, a clamping seat, and a pivot shaft. The fixed seat is fixedly connected to the through portion, and the clamping seat rotates around the pivot shaft to clamp the seat belt.

[0014] According to one embodiment, the seat body also includes a base, the base having a top rod, and a connecting part located at the top rod.

[0015] A child safety seat according to a second embodiment of the present disclosure includes: a seat portion having two spaced-apart openings; a crotch strap adjustment mechanism mounted on the seat portion; and a crotch strap having a first end and a second end, the first end and the second end respectively passing through one of the two openings and connected to the crotch strap adjustment mechanism; wherein the crotch strap adjustment mechanism includes: a mounting base having a first fixing portion and a second fixing portion spaced-apart, the first end of the crotch strap being connected to the first fixing portion, and the second end of the crotch strap being connected to the second fixing portion; and a positioning member slidably mounted on the mounting base, the first end of the crotch strap being wound around the positioning member, the positioning member being movable relative to the child safety seat between a first position and a second position to adjust the length of the crotch strap.

[0016] In one embodiment, the seat includes a first engaging portion and a second engaging portion; the positioning member includes a first positioning portion and a second positioning portion, the first positioning portion and the second positioning portion being opposite to each other along the sliding direction of the positioning member; when the positioning member is in the first position and the second position, the first positioning portion and the second positioning portion are respectively engaged with the first engaging portion and the second engaging portion.

[0017] In one embodiment, the first positioning part and the second positioning part each include an external engagement point;

[0018] The outer engagement points are respectively formed at the outer ends of the first positioning part and the second positioning part along the sliding direction, and are respectively formed as vertically extending walls.

[0019] In one embodiment, the first engaging portion and the second engaging portion each include a top wall, an outer wall, and an inner wall. The inner wall extends obliquely downward from the inner end of the corresponding top wall, and the outer wall extends downward from the outer end of the corresponding top wall. When the positioning member is in the first position, the outer engaging point of the first positioning portion abuts against the outer wall of the first engaging portion, and the outer engaging point of the second positioning portion abuts against the inner wall of the second engaging portion. When the positioning member is in the second position, the outer engaging point of the first positioning portion abuts against the inner wall of the first engaging portion, and the outer engaging point of the second positioning portion abuts against the outer wall of the second engaging portion.

[0020] In one embodiment, the positioning member includes an operating part located between the first positioning part and the second positioning part: an operating port is formed between the first engaging part and the second engaging part, the operating part is exposed through the operating port, and can move within the range of the operating port.

[0021] In one embodiment, when the positioning member is in the first position and the second position, the operating part abuts against the inner sidewall of the first engaging part and the inner sidewall of the second engaging part, respectively.

[0022] In one embodiment, the first positioning part and the second positioning part each include an inclined surface, which extends downward at an angle from the corresponding outer engagement point toward the center of the positioning member; the inner sidewalls extend downward at an angle from the corresponding top wall, and the extension direction of the inner sidewalls is closer to vertical than the extension direction of the inclined surface.

[0023] In one embodiment, the first positioning part and the second positioning part each include at least one protrusion, and each protrusion extends laterally outward from the corresponding outer engagement point of the first positioning part and the second positioning part.

[0024] In one embodiment, the positioning member includes a first sliding rib and a second sliding rib, the first sliding rib and the second sliding rib extending along the moving direction of the positioning member and disposed on opposite sides of the positioning member; the mounting base is provided with a first sliding groove and a second sliding groove, the first sliding rib and the second sliding rib sliding in the first sliding groove and the second sliding groove respectively.

[0025] In one embodiment, the crotch strap adjustment mechanism includes a first fixed rod and a second fixed rod fixed to the mounting base, and a movable rod fixed to the positioning member; the crotch strap includes a first segment and a second segment connected to each other, the first end of the first segment and the second end of the second segment being fixed to the first fixed rod and the second fixed rod, respectively; the first segment passes around the movable rod, such that at least a portion of the first segment forms an overlapping segment, and when the positioning member moves between the first position and the second position, the length of the overlapping segment changes, thereby changing the effective length of the crotch strap; the movable rod is perpendicular to the moving direction of the positioning member, and both ends of the movable rod are fixed to a first receiving portion and a second receiving portion at the bottom surface of the positioning member, respectively.

[0026] A child safety seat according to a third embodiment of the present disclosure includes: a seat portion having a first opening and a second opening spaced apart; a crotch strap adjustment mechanism installed in the seat portion and including a first positioning member and a second positioning member; and a crotch strap having a first end and a second end, the first end and the second end respectively passing through the first opening and the second opening and respectively connected to the first positioning member and the second positioning member, wherein the second end is adjustablely connected to the second positioning member to adjust the length of the crotch strap.

[0027] In one embodiment, the second positioning member has a frame-shaped structure with a central rod, the second end of which is wound around the central rod to adjust the length of the crotch strap.

[0028] In one embodiment, the crotch strap includes a second segment, a third segment, a fourth segment, and a fifth segment connected in sequence, and the second positioning member includes a first gap and a second gap located on both sides of the intermediate rod, respectively; the second segment extends from the upper side of the second positioning member through the first gap to the lower side of the second positioning member, the third segment extends from the outer side of the second positioning member to the upper side of the second positioning member, the fourth segment extends through the second gap to the lower side of the second positioning member, and the fifth segment extends through the first gap to the upper side of the second positioning member.

[0029] In one embodiment, the middle part of the second positioning member is recessed downwards, making the second positioning member have an arc shape that is low in the middle and high at both ends.

[0030] In one embodiment, the first opening has a trapezoidal cross-section and a larger area on the side away from the first positioning member and a smaller area on the side closer to the first positioning member; and / or the second opening has a trapezoidal cross-section and a larger area on the side away from the second positioning member and a smaller area on the side closer to the second positioning member.

[0031] In one embodiment, the child safety seat further includes a base, the seat portion being connected to the base and adjustable relative to the base between a first position and a second position; the seat portion has an operating port below it to allow operation of the second positioning member from outside the seat portion, the operating port being covered by the base when the seat portion is in the first position; and the operating port being exposed outside the base when the seat portion is in the second position.

[0032] In one embodiment, the first positioning member has a frame-shaped structure with a central rod, the first end of which is wound and fixed to the central rod; a cover is also provided below the seat, the cover being able to cover the operating port and being able to be removed to expose the operating port. Attached Figure Description

[0033] Figure 1 shows a front perspective view of a child safety seat installed on a vehicle seat according to a first embodiment of the present disclosure;

[0034] Figure 2 shows a side view of a child safety seat according to an embodiment and a perspective view of a first clamp;

[0035] Figure 3 shows a rear perspective view of a child safety seat according to an embodiment;

[0036] Figure 4 shows a perspective view of a child safety seat with the outer shell removed according to an embodiment;

[0037] Figure 5 shows a rear view of a child safety seat according to one embodiment;

[0038] Figure 6 shows another perspective view of a child safety seat according to one embodiment;

[0039] Figure 7 shows a perspective view of the connecting portion according to an embodiment;

[0040] Figure 8 shows a cross-sectional view at section line II in Figure 7;

[0041] Figure 9 shows a perspective view and a partial detail view of the connecting portion according to an embodiment;

[0042] Figure 10 shows a cross-sectional view of the connection portion according to an embodiment at section line II-II in Figure 8;

[0043] Figure 11 shows a cross-sectional view of the connection portion according to an embodiment at section line II-II in Figure 8;

[0044] Figure 12 shows a perspective view of a snap-fit ​​component according to an embodiment;

[0045] Figure 13 shows a side view of the release operation member according to one embodiment;

[0046] Figure 14 shows a combined view of the release operation member and the engaging member according to an embodiment;

[0047] Figure 15 shows a cross-sectional view of the connecting portion according to yet another embodiment;

[0048] Figure 16 shows a cross-sectional view of the connecting portion according to yet another embodiment;

[0049] Figure 17 shows a cross-sectional view of the connecting portion according to yet another embodiment;

[0050] Figure 18 is a perspective view of a first embodiment of a child safety seat according to the present disclosure;

[0051] Figure 19 is a perspective view of the child safety seat from another angle, in which the lower shell of the child safety seat has been removed to clearly show the upper shell of the seat, the crotch strap, the buckle, and the positioning elements;

[0052] Figure 20 is a partial front sectional view of a child safety seat taken along line AA in Figure 18, with the positioning element in the first position;

[0053] Figure 21 is an enlarged view of the area within the dashed box in Figure 20.

[0054] Figure 22 is a partial front sectional view of a child safety seat taken along line AA in Figure 18, with the positioning element in the second position;

[0055] Figure 23 is an enlarged view of the area within the dashed box in Figure 22;

[0056] Figure 24 is an exploded perspective view of the mounting base and positioning components;

[0057] Figure 25 is a three-dimensional view of the bottom surface of the positioning component;

[0058] Figure 26 is a three-dimensional view of the bottom surface of the positioning component and the moving rod;

[0059] Figure 27 is a three-dimensional view of the crotch belt adjustment mechanism, the crotch belt, and the buckle;

[0060] Figure 28 is a perspective view of the crotch belt adjustment mechanism, crotch belt, and buckle, with the mounting base removed;

[0061] Figure 29 is a perspective view of a child safety seat according to a third embodiment of the present disclosure;

[0062] Figure 30 is a front view of the child safety seat;

[0063] Figure 31 is a partially enlarged sectional view taken along line BB in Figure 29;

[0064] Figure 32 is a three-dimensional view of the fastener, the crotch strap, the first positioning component, and the second positioning component;

[0065] Figure 33 is an enlarged view of the boxed portion in Figure 32;

[0066] Figure 34 is a bottom-view perspective view of the child safety seat, with the seat in an upright position;

[0067] Figure 35 is a bottom-view perspective of the child safety seat, with the seat in a supine position;

[0068] Figure 36 is a bottom-view perspective view of the child safety seat, showing the hood.

[0069] List of reference numerals: 1001 Child safety seat; 1010 Seat body; 1101 Backrest; 1100 Main body; 1200 Connecting part; 1210 Connecting rod; 1220 Positioning part; 1230 Fastening part; 1300 First fixing part, first clamp; 1310 Fixing seat; 1320 Clamp seat; 1330 Pivot shaft; 1340 Protrusion; 1350 Recess; 1360 Receiving part; 1370 Release operation part; 1400 Second fixing part, second clamp; 1410 Clamp seat; 1411 Clamp seat body; 1412 Reinforcing plate; 1413 Sliding pad; 1420 Clamp arm; 1421 Clamp arm body; 1421a Storage part; 1422 Release operation part; 1422a Driving part; 1422b Release operation part; 1422c Perforation; 1423 Reinforcing plate; 1424 Snap-fit ​​part; 1424a Hook; 1424b Abutment part. 1424c Lug 1424d Perforation 1425 Elastic element 1430 Connector 1431 Lug 1432 Fitting part 1433 Locking pin 1434 Perforation 1435 Bolt 1501 First pivot 1502 Second pivot 1503 Hollow part 1102 Seat part 1103 Side wing 1103a Through part 1103b Blocking part 1103c Mounting part 1104 Headrest part 1105 Reinforcing bar 1011 Lap assembly 1111 Lap body 1111a End 1112 Anchoring part 1012 Base 1002 Vehicle seat 1020 Seating part 1021 Backrest 1022 Seat belt assembly 1221 Seat belt 12 21a Shoulder strap 1221b Waist belt 1222 Fixing point 1223 Pull-out part 1224 Buckle 2100 Hip belt adjustment mechanism 2110 Mounting base 2111 First sliding groove 2112 Second sliding groove 2113 First rod mounting part 2114 Second rod mounting part 2115 Bottom wall 2116 Mounting part 2117 Guide part 2120 Positioning component 2121 Operating part 2122 First positioning part 2122a Inclined surface 2122b Inner locking point 2122c Outer locking point 2122d Protrusion 2123 Second positioning part 2123a Inclined surface 2123b Inner locking point 2123c Outer locking point 2123d Protrusion 2124 First 1. Sliding rib 2124a Notch 2125 2. Second sliding rib 2125a Notch 2126 2. First receiving part 2127 2. Second receiving part 2128 Gap 2130 2. First engaging part 2131 Top wall 2132 Outer wall 2133 Inner wall 2140 2. Second engaging part 2141 Top wall 2142 Outer wall 2143 Inner wall 2150 2. First fixing rod 2160 2. Second fixing rod 2170 Moving rod 2200 Crotch strap 2210 First section 2220 2.225 Overlapping section 2230 3. Third section 2240 4. Fourth section 2250 5. Fifth section 2260 1. First end 2270 2. Second end 2300 Buckle2400 Child Safety Seat 2410 Seat 2411 Opening 2412 Operating Port 2413 First Opening 2414 Second Opening 2415 First Operating Port 2416 Second Operating Port 2417 Cover 2418 Ribs 2418a First Rib Group 2418b Second Rib Group 2418c Third Rib Group 2418d Fourth Rib Group 2420 Base 2430 Seat Belt 2500 Crotch Belt Adjustment Mechanism 2510 First Positioning Component 2511 Center Bar 2520 Second Positioning Component 2521 First Gap 2522 Second Gap 2523 Center Bar 2524 Side Detailed Implementation

[0070] While this invention 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 the invention.

[0071] Unless otherwise specified, "front" in this document refers to the direction the child faces when sitting in a child safety seat, "rear" refers to the direction the child faces away from, and "left," "right," "up," and "down" refer to the left, right, up, and down directions when viewing the diagram. Furthermore, the descriptions of directions such as "front," "rear," "left," "right," "up," and "down" in this document are for ease of understanding only. This invention is not limited to these directions but can be adjusted according to actual circumstances. Although this disclosure has been described with reference to exemplary embodiments, the terminology used is illustrative and exemplary, not restrictive.

[0072] Figures 1 to 6 show perspective views of a child safety seat 1001 according to a first embodiment of the present disclosure, wherein Figure 1 shows a front perspective view of a child safety seat 1001 installed on a vehicle seat 1002 according to an embodiment. The vehicle seat 1002 includes a seating portion 1020 and a backrest 1021 located above the seating portion 1020, wherein the seating portion 1020 is located in front of the backrest 1021 in the fore-aft direction, the seating portion 1020 supports the child safety seat 1001 upwards, and the backrest 1021 abuts against the child safety seat 1001 forwards.

[0073] As shown in Figure 1, the child safety seat 1001 includes a seat body 1010 for a child to sit in, a strap assembly 1011 located at the top of the seat body 1010, and a base 1012 located below the seat body 1010. The base 1012 is placed on the seating portion 1020. The seat body 1010 is secured to the vehicle seat 1002 by the vehicle seat belt and the strap assembly 1011. In some embodiments of this disclosure, the seat body 1010 engages with the base 1012 and can be selectively adjusted in tilt angle relative to the base 1012.

[0074] According to this disclosure, the child safety seat 1001 is secured to the vehicle seat 1002 using a seatbelt assembly 1022. The seatbelt assembly 1022 is a three-point seatbelt, including a seatbelt 1221 and a buckle 1224 threaded onto the seatbelt 1221. The seatbelt 1221 is made of a single piece of fabric, with its lower end fixed to a fixing point 1222 on the lower right side of the backrest 1021, and its upper end retractably mounted to a pull-out portion 1223 on the upper right side of the backrest 1021. The buckle 1224 is inserted into a latch located on the lower left side of the backrest 1021. The seatbelt 1221 forms shoulder straps 1221a and lap belts 1221b on either side of the buckle 1224. When the child safety seat 1001 is not in use, the shoulder straps 1221a are used to secure the upper body diagonally downwards from, for example, an adult's shoulder, and the lap belts 1221b are used to secure the waist laterally. When using the seat belt assembly 1022 to secure the child safety seat 1001, the lap belt 1221b is used to horizontally secure the lower part of the backrest 1101, forming two fixing points on the left and right sides with the backrest 1101, while the shoulder belt 1221a passes diagonally from top to bottom through the backrest 1101, forming a fixing point on the upper right side of the backrest 1101.

[0075] To secure the seat belt 1221 to the child safety seat 1001, the present disclosure provides a plurality of fixing parts. As shown in Figures 1-7, a first fixing part 1300 is provided on the side wing 1103. The first fixing part 1300 is located on the upper part of the side wing 1103 and is configured as a first clamp 1300 for clamping the seat belt 1221 to prevent the seat belt 1221 from sliding relative to the side wing 1103.

[0076] Referring to the perspective view of the first clamp 1300 in the upper left corner, the fixing base 1310 is constructed as a shell, which houses the pivot shaft 1330. The clamp 1320 can rotate around the pivot shaft 1330, for example, by manually turning the release operation part 1350 clockwise or counterclockwise. At the opening formed by the fixing base 1310 and the clamp 1320, the fixing base 1310 is provided with protrusions 1340, which may be multiple evenly arranged. Correspondingly, the clamp 1320 is provided with recesses 1350. The protrusions 1340 and the recesses 1350 cooperate with each other to increase the contact area with the shoulder strap 1221a, thereby better clamping the shoulder strap 1221a. A receiving portion 1360 is provided on the clamp 1320 for accommodating a torsion spring (not shown). The torsion spring body is fitted onto a pivot shaft 1330 exposed from the clamp 1320, with one end inserted into the clamp 1320 and the other end inserted into the fixing seat 1310, thereby providing sufficient elastic force for clamping the shoulder strap 1221a.

[0077] The shoulder strap 1221a can pass through the first clamp 1300 and be clamped and fixed by the first clamp 1300. Referring to Figure 2, the side wing 1103 includes a through portion 1103a, which extends along the seat height direction on the side wing 1103. To facilitate the insertion of the seat belt 1221, the through portion 1103a is designed to have a larger opening at the bottom, and a protrusion 1103b is provided on the side near the backrest 1101. The protrusion 1103b is used to prevent the lap belt 1221b of the seat belt 1221 from sliding upward. The first clamp 1300 is disposed on the mounting portion 1103c above the through portion 1103a, and includes a fixing seat 1310, a clamping seat 1320, and a pivot shaft 1330. The fixing seat 1310 is fixedly connected to the mounting portion 1103c, and the clamping seat 1320 rotates around the pivot shaft 1330 to clamp the shoulder strap 1221a, thereby preventing the shoulder strap 1221a from slipping. The shoulder strap 1221a forms a fixing point at the first clamp 1300 and the upper part of the backrest 1101. The lap belt 1221b forms two fixing points at the protrusions 1103b of the left and right side wings 1103 and the lower part of the backrest 1101. In addition, the child safety seat 1001 is also provided with a five-point safety belt (not shown in the figure) for securing the child to the seat body 1010. When the child is sitting in the seat body 1010, the vehicle seat belt 1221 is located between the child and the backrest 1101 of the seat body 1010.

[0078] According to this disclosure, the strap assembly 1011 is used to connect the top of the seat body 1010 to the rear side of the backrest 1021 of the vehicle seat 1002, and to connect the seat body 1010 rearward to the vehicle's anchor point via the strap assembly 1011, thereby preventing the seat body 1010 from overturning forward when the vehicle brakes or a collision occurs, thus avoiding danger to the child sitting in the seat body 1010.

[0079] As shown in Figure 1, the seat body 1010 includes a seat 1102 for carrying a child, a backrest 1101 for supporting the child's back, and a headrest 1104 for contacting the child's head. Both the backrest 1101 and the headrest 1104 are located above the seat 1102. The backrest 1101 includes a main body 1100 that abuts against the child's back and a connecting portion 1200 located on the upper side of the main body 1100. The main body 1100 also includes two side wings 1103 located on both sides of the main body 1100. The two side wings 1103 secure the child's upper body from both sides to prevent lateral impacts to the upper body.

[0080] As shown in Figures 1 and 3, a connecting portion 1200 protrudes from the top of the main body 1100. The connecting portion 1200 extends laterally, with its two ends inserted into the top of the main body 1100, while the remaining portion is spaced vertically or abutted against the main body 1100. The connecting portion 1200 is used to connect with the harness assembly 1011 and can also serve as a handle for carrying the child safety seat 1001. In another embodiment, the connecting portion 1200 can also be replaced by a top rod inserted into the base 1012, and is not limited to being located on the main body 1100. In yet another embodiment, the connecting portion 1200 can also be located inside the main body 1100 and covered by the housing of the main body 1100.

[0081] As shown in Figure 1, the connecting part 1200 is a long rod with its longitudinal axis extending along the upper edge of the backrest 1101. It includes a central connecting rod 1210 and two positioning parts 1220 located on both sides of the connecting rod 1210, which are bent to position the strap assembly 1011. The two positioning parts 1220 and the top of the main body 1100 respectively form two gaps that are not connected to each other.

[0082] As shown in Figure 1, the strap assembly 1011 includes a strap body 1111 and an anchoring portion 1112. One end of the strap body 1111 is connected to the connecting portion 1200 of the seat body 1010, and the other end is connected to the anchoring portion 1112. The anchoring portion 1112 is a hook for connecting to the vehicle's anchoring point. The hook has a through hole through which the strap body 1111 can pass to connect with the anchoring portion 1112. The anchoring portion 1112 defines two segments of the strap body 1111, that is, the two segments are located on both sides of the anchoring portion 1112. The length of the two segments can be adjusted by moving the anchoring portion 1112. According to this disclosure, the strap assembly 1011 can be formed from a single piece of fabric or a combination of two pieces of fabric.

[0083] According to other embodiments, the connecting portion 1200 has a positioning portion 1220 in the middle, which forms a gap with the top of the main body 1100 for positioning the strap body 1111. The strap body 1111 can be formed from a single piece of fabric, with one end fixedly connected to the positioning portion 1220 of the connecting portion 1200 and the other end provided with an anchoring portion 1112 (see Figures 15 and 17). The connecting portion 1200 may also have one positioning portion 1220 in the middle and one on each side of the middle, i.e., three positioning portions 1220 (see Figure 16). This disclosure is not limited thereto.

[0084] As shown in Figure 1, on the side away from the anchoring portion 1112, the two ends 1111a are respectively connected to the positioning portion 1220 of the connecting portion 1200 backing against the top of 1101. Optionally, the two ends 1111a are constructed as collars and fitted onto the connecting portion 1200. Specifically, the two ends 1111a are joined into collars by, for example, sewing after passing around the connecting portion 1200; alternatively, the two ends can be sewn into collars before being fitted onto the connecting portion 1200.

[0085] Specifically, the connecting rod 1210 of the connecting portion 1200 abuts against or is close to the main body 1100 of the backrest 1101, and the two positioning portions 1220 are respectively configured such that one end rises arc-shaped from the connecting rod 1210, and the other end is connected to the reinforcing rod 1105 of the main body 1100 or the child safety seat 1001 (see Figure 4). The two ends 1111a are respectively positioned on the positioning portions 1220 on both sides of the connecting portion 1200.

[0086] Some known child safety seats 1001 are fixed to the vehicle seat 1002 solely by a three-point seatbelt 1221 and a top harness assembly 1011. Because the anchor point of the harness body 1111 does not coincide with the anchor point of the seatbelt 1221 (e.g., the anchor point of the seatbelt 1221 is lower than the anchor point of the harness body 1111), when the vehicle comes to a rapid stop, the seatbelt 1221 cannot effectively distribute the force borne by the harness body 1111, which may cause the harness body 1111 to break.

[0087] In this embodiment, a second fixing part 1400 is provided on the connecting part 1200. The second fixing part 1400 includes a second clamp 1400. According to this embodiment, two second clamps 1400 are provided, which are respectively fixed on two positioning parts 1220. The second clamp 1400 mainly includes a clamp base 1410, a clamp arm 1420 that cooperates with the clamp base 1410 to clamp the shoulder strap 1221a, and a connector 1430 for connecting with the connecting part 1200. The clamp base 1410 and the clamp arm 1420 extend laterally, thereby being able to clamp the seat belt 1221 that passes through longitudinally. The specific structure and usage of the second clamp 1400 will be described in detail later with reference to Figures 7-14.

[0088] According to the usage method of this embodiment, when fixing the child safety seat 1001 to the vehicle seat 1002, the caregiver first engages the anchoring part 1112 of the strap assembly 1011 with the anchoring point on the rear side of the vehicle seat 1002 and tightens the strap body 1111. Then, the caregiver passes the three-point seat belt 1221 (i.e., shoulder belt 1221a and lap belt 1221b) sequentially through the through-hole 1103a in the right wing 1103 and the through-hole 1103a in the left wing 1103 in Figure 1, and inserts the buckle 1224 into the corresponding fastener (not shown) of the vehicle. The shoulder belt 1221a is then secured at the first clamp 1300. Simultaneously, the lap belt 1221b is positioned below the blocking portion 1103b, i.e., the protrusion 1103b, provided at the through-hole 1103a (see Figure 2), while the shoulder belt 1221a is positioned below the protrusion 1103b in the left wing 1103, roughly overlapping with the lap belt 1221b, to prevent the shoulder belt 1221a and lap belt 1221b from moving upwards. Thus, the seat body 1010 is fixedly installed on the vehicle seat 1002.

[0089] After securing the seat body 1010, the caregiver clamps the shoulder strap 1221a between the first clamp 1300 and the pull-out portion 1223 onto the second clamp 1400 on the right side. At this point, the second clamp 1400 on the right side in Figure 1 is opened, and the shoulder strap 1221a passes between the clamp seat 1410 and the clamp arm 1420, causing the clamp seat 1410 and clamp arm 1420 to clamp the shoulder strap 1221a. Subsequently, as the excess length of the shoulder strap 1221a is automatically retracted by the retractor within the pull-out portion 1223, the shoulder strap 1221a is tightened.

[0090] According to this disclosure, the second clamp 1400 is positioned close to the connection point between the harness assembly 1011 and the connecting portion 1200. By positioning the second clamp 1400 near the connection point of the harness assembly 1011 to hold the shoulder strap 1221a of the vehicle seat belt 1221, the vehicle seat belt 1221 clamped at the second clamp 1400 can distribute more of the tension borne by the harness assembly 1011 in the event of an unexpected emergency stop. This effectively prevents the harness assembly 1011 from being damaged due to excessive tension, ensuring the stability of the child safety seat 1001 connection. In addition, both the harness assembly 1011 and the second clamp 1400 are mounted on the fixing tube of the top connecting portion 1200, and the top fixing tube is fixedly connected to the reinforcing tube constituting the frame of the child safety seat, thereby making the connection between the harness assembly 1011 and the second clamp 1400 more secure and ensuring greater strength.

[0091] The second clamp 1400 is provided in the positioning part 1220 of the connecting part 1200, and its width is basically the same as that of the positioning part 1220.

[0092] Figure 3 shows a rear perspective view of a child safety seat 1001 according to an embodiment. As can be seen from Figure 3, the right side wing 1103 of Figure 1 is arranged in a manner that is basically the same as that of the left side wing 1103 shown in Figure 2.

[0093] Figure 4 shows a rear perspective view of a child safety seat 1001 according to an embodiment, wherein the outer shell of the right wing of the child safety seat 1001 has been removed, so that the reinforcing bar 1105 disposed inside the seat can be seen.

[0094] According to this embodiment, the child safety seat 1001 includes a reinforcing bar 1105 located at the rear of the seat body 1010. The reinforcing bar 1105 is, for example, two reinforcing tubes (only one is schematically shown in the figure), and the connecting part 1200 is configured as an M-shaped connecting tube, connecting to the upper ends of the two reinforcing tubes. The reinforcing bar 1105 extends along the backrest 1101 to below the seat 1102, providing overall reinforcement to prevent the child safety seat 1001 from deforming.

[0095] Alternatively, the connecting part 1200 may be integral with the reinforcing rod 1105, thereby providing better stability. Furthermore, the reinforcing rod 1105 may be one or more, or may be configured in other forms, and this disclosure is not limited thereto.

[0096] Figure 5 shows a rear view of a child safety seat 1001 according to an embodiment, wherein the second clamp 1400 on the positioning part 1220 is removed, thereby allowing a better view of the configuration of the connecting part 1200, in which a connecting rod 1210 is provided between the two positioning parts 1220. The positioning parts 1220 and the connecting rod 1210 may be made from a single tube by a bending process. The connecting rod 1210 can rest against or be close to the main body 1100 of the backrest 1101.

[0097] As can be seen in Figure 5, the left and right sides of the child safety seat 1001 are basically symmetrical, especially the left and right side wings 1103, which have the same configuration. Therefore, the child safety seat 1001 can be used on either side of the vehicle, improving its adaptability.

[0098] Figure 6 shows another perspective view of a child safety seat 1001 according to an embodiment, in which it can be seen that the structure of the right side wing 1103 is basically the same as that of the left side wing 1103.

[0099] Figure 7-11 shows multiple views of the connecting portion 1200, wherein a second clamp 1400 according to the present disclosure is provided on the connecting portion 1200.

[0100] In Figure 7, the connecting part 1200 is roughly configured as an M-shaped connecting tube. Two positioning parts 1220 are formed at the two corners of the M by bending. A connecting rod 1210 is provided between the two positioning parts 1220. A fastening part 1230 is provided on the connecting rod 1210. The fastening part 1230 is used to additionally fasten the connecting part 1200 to the main body 1100 backing 1101 at the connecting rod 1210. This provides a third connection point in the middle, in addition to the connection to the reinforcing rod 1105 (see Figure 4) at the two feet of the M, thereby improving the stability of the connecting part 1200. Alternatively, the connecting part 1200 can also be configured as two independent U-shapes.

[0101] A second clamp 1400 is provided on each of the two positioning parts 1220. The second clamp 1400 is generally elongated and includes a clamp base 1410, a clamp arm 1420 that cooperates with the clamp base 1410 to clamp, and a connector 1430 that fixes the second clamp 1400 on the positioning part 1220.

[0102] The connector 1430 includes two lugs 1431. The upper ends of the lugs 1431 are connected to other components of the second clamp 1400 via a first pivot 1501 and a locking pin 1433, respectively. The lower ends of the lugs 1431 are fitted onto the positioning part 1220 and connected to the clamp seat 1410 to secure the second clamp 1400 to the positioning part 1220. Optionally, a fitting part 1432 is provided between the two lugs 1431. The fitting part 1432 connects the two lugs 1431 on one hand and fits into the lower side of the positioning part 1220 on the other hand, thereby providing a larger contact area and increasing friction to prevent the second clamp 1400 from loosening. The fitting part 1432 and the two lugs 1431 together can be made of, for example, a single sheet material, thereby saving manufacturing costs.

[0103] According to this embodiment, a hollow portion 1503 is formed between the clamp 1410 and the positioning portion 1220. The hollow portion 1503 is used to provide a receiving gap for the end 1111a of the strap body 1111. The end 1111a is fitted into the receiving gap and is clamped by a pair of connectors 1430, thereby preventing the end 1111a of the strap body 1111 from sliding left and right along the connecting rod 1210, which would cause uneven force on the backrest 1101.

[0104] According to this embodiment, a first pivot 1501 passes through the clamp 1410, clamp arm 1420, and connector 1430, thereby allowing the clamp arm 1420 to be lifted upwards around the first pivot 1501 from the position shown in the figure. The clamp arm 1420 includes a clamp arm body 1421 and a release operation member 1422. A second pivot 1502 passes through the clamp arm body 1421 and the release operation member 1422, allowing the release operation member 1422 to be rotated upwards around the second pivot 1502, thereby opening the second clamp 1400 and removing the shoulder strap 1221a (see Figure 1). The second clamps 1400 on the left and right sides can optionally be mirrored.

[0105] Figure 8 shows a cross-sectional view at section line II in Figure 7, revealing a lug 1431 that covers the positioning part 1220 made of hollow tubing from below. The lug 1431 extends from both sides to the clamping arm 1420, and a locking pin 1433 passes through the lug 1431 and the clamping arm 1420 and is fixed to the lug 1431. Figure 8 also shows a reinforcing plate 1423, optionally located in the middle of the clamping arm body 1421 within the clamping arm 1420. This reinforcing plate can optionally be covered by the clamping arm body 1421, thereby providing internal reinforcement to the clamping arm body 1421, which is generally made of soft material. The reinforcing plate 1423 can be made of sheet material, such as iron sheet, plastic sheet, wood sheet, etc.

[0106] A clamping seat 1410 is disposed above the positioning part 1220. The clamping seat 1410 includes a clamping seat body 1411 and a reinforcing plate 1412. The clamping seat body 1411 is made of plastic material and has a groove for insertion from below, providing additional reinforcement. The reinforcing plate 1412 can be made of sheet material, such as iron sheet, plastic sheet, wood sheet, etc., bent. The reinforcing plate 1412 can also be configured in other forms, which are not limited to this disclosure.

[0107] According to this disclosure, the lower part of the clamping arm body 1421 has a rib with a toothed structure. The seat belt 1221 is clamped between the groove and the rib, thereby increasing the contact area with the seat belt 1221 and improving the friction when the clamping arm body 1421 and the clamping seat body 1411 are clamped together, which effectively prevents the seat belt 1221 from slipping and loosening.

[0108] Figure 9 shows a perspective view and a partial detail view of the connecting portion 1200 according to an embodiment. In Figure 9, the two lugs 1431 of the connector 1430 and the fitting portion 1432 therebetween can be clearly seen. The lugs 1431 are U-shaped, and a through hole 1434 can be provided in the middle for attaching a bolt (not shown) to fix it to the positioning portion 1220.

[0109] As shown in Figure 9, the second clamp 1400 on the right is in the open state, and the clamp arm 1420 has removed the clamp arm body 1421, thus exposing the reinforcing piece 1423. The reinforcing piece 1423 is set to a corresponding arc shape according to the shape of the positioning part 1220. The second clamp 1400 on the left is in the closed state.

[0110] One end of the reinforcing plate 1423 of the clamping arm 1420 is pivotally connected to the clamping seat 1410, and the other end is provided with a release operation member 1422 and a locking member 1424. The release operation member 1422, the locking member 1424 and the reinforcing plate 1423 are provided with a second pivot 1502, so that the release operation member 1422 and the locking member 1424 can pivot relative to the reinforcing plate 1423.

[0111] The release mechanism 1422 includes a driving part 1422a (also referred to as a driving rib 1422a) and a release mechanism 1422b. A locking member 1424 is used to lock the pivoting of the clamp arm 1420 and the clamp seat 1410. The release mechanism 1422b is used by the caregiver to release the locking of the clamp arm 1420 and the clamp seat 1410, allowing the clamp arm 1420 to pivot freely about the first pivot 1501. The driving part 1422a is inserted into the locking member 1424, so that when the release mechanism 1422b is lifted, it can drive the locking member 1424 to rotate about the second pivot 1502, thereby allowing the hook portion 1424a of the locking member 1424 to disengage from the locking pin 1433 (in the case of the second clamp 1400 on the left side of Figure 9, the hook portion 1424a engages with the locking pin 1433). In some other embodiments, the release mechanism 1422 and the locking mechanism 1424 may also be provided on the clamp 1410.

[0112] According to this embodiment, an elastic element 1425, which is a torsion spring 1425, is provided between the release operation member 1422 and the clamping arm 1420. The torsion spring 1425 is sleeved on the second pivot 1502, and its end near the reinforcing plate 1423 is U-shaped. The legs of the U extend to the second pivot 1502, and the bottom of the U abuts against or engages with the reinforcing plate 1423 to provide support. The other end of the torsion spring 1425 extends into and is fixed to the release operation member 1422 or the engaging member 1424 to bias the engaging member 1424 in the locking direction.

[0113] Figure 10 shows a cross-sectional view along section line II-II of Figure 8, with both second clamps 1400 locked, and engaging member 1424 engaging clamp arm 1420 onto clamp seat 1410. Vehicle seat belt 1221 is clamped between clamp arm 1420 and clamp seat 1410 in a direction away from or close to the paper (not shown in the figure).

[0114] The following description refers to the second clamp 1400 on the left side of this embodiment. The fitting portion 1432 and the positioning portion 1220 are designed to be arc-shaped to match each other. The left end of the clamp body 1411 of the clamp 1410 abuts against the positioning portion 1220, and the reinforcing piece 1412 is inserted into the left end. Since the clamp body 1411 is made of soft material, the downward pressure generated when the clamp arm 1420 pivots can be buffered by the clamp body 1411. The right end of the reinforcing piece 1412, made of hard material, abuts against the positioning portion 1220, thereby providing better support. A hollow portion 1503 flows out between the reinforcing piece 1412 and the positioning portion 1220 for accommodating the end 1111a of the strap body 1111.

[0115] The clamp arm body 1421 of the clamp arm 1420 is configured to cooperate with the clamp seat 1410 to tighten the seat belt 1221. The left end of the clamp arm body 1421 is spaced apart from the clamp seat 1410 to provide pivoting space for the clamp arm 1420, and the right end forms a receiving portion 1421a for receiving the release operation 1422 and the engaging member 1424. As can also be seen from Figure 10, one leg of the torsion spring 1425 schematically extends into the release operation 1422, and the other leg is engaged with the upper edge of the reinforcing plate 1423. The body of the torsion spring 1425 is fitted onto the second pivot 1502 (not shown).

[0116] The release operation member 1422 is provided with a driving part 1422a, and behind it is a stop part 1424b of the engaging member 1424. When the release operation member 1422 is pivoted upward by manually controlling the release operation part 1422b, the driving part 1422a drives the stop part 1424b, thereby causing the hook part 1424a of the engaging member 1424 to pivot upward at the same time, disengaging from the engagement with the locking pin 1433.

[0117] As shown in the second clamp 1400 on the right side of Figure 10, a bolt 1435 (omitted in the second clamp 1400 on the left side) is provided to fix the left end of the clamp 1410. This bolt passes through the clamp body 1411 and the reinforcing plate 1412 and is screwed into the positioning part 1220. Advantageously, the bolt 1435 can also pass through the positioning part 1220 and the through hole 1434 in the connector 1430. This disclosure is not limited to this embodiment.

[0118] Figure 11 shows a cross-sectional view along section line II-II of Figure 8. Unlike Figure 10, the release mechanism 1422 of the second clamp 1400 on the right side is raised upwards, thereby causing the engaging member 1424 to disengage from the locking pin 1433. In this state, the clamping arm 1420 can be disengaged from the closed state of the clamping seat 1410. In this state, the torsion spring 1425 undergoes elastic deformation under the action of the release mechanism 1422. The clamping arm 1420 is raised upwards from the position shown in Figure 10, thereby disengaging from the closed state of the clamping seat 1410.

[0119] Figure 12 shows a perspective view of a locking member 1424 according to an embodiment, and Figure 13 shows a side view of a locking operation member 1422 according to an embodiment.

[0120] The engaging component 1424 is made of, for example, plastic injection molding and includes a hook portion 1424a, an abutment portion 1424b connecting the two hook portions, and a lug 1424c extending upward from the hook portion. The lug 1424c has a through hole in the middle for inserting a pivot.

[0121] The release mechanism 1422 is made of, for example, plastic injection molding or metal material, and includes a release mechanism 1422b at one end, a drive part 1422a, and a through hole 1422c at the other end for a pivot to pass through.

[0122] The configuration of the locking component 1424 and the unlocking operation component 1422 can be arbitrarily set as needed, such as setting hollow parts, deformable parts, protrusions, etc., and this disclosure is not limited thereto.

[0123] Figure 14 shows a combined view of the release operation member 1422 and the engaging member 1424 according to one embodiment. The engaging member 1424 is assembled into the release operation member 1422. A torsion spring 1425 is schematically shown, fixed to one end of the release operation member 1422 and the engaging member 1424. According to this embodiment, the driving portion 1422a of the release operation member 1422 abuts against the abutting portion 1424b of the engaging member 1424. Thus, when the release operation member 1422 moves upward in the direction of the arrow, it can drive the abutting portion 1424b, thereby driving the hook portion 1424a to move upward. In the assembled state, the through holes of the release operation member 1422 and the engaging member 1424 are aligned with each other for pivot insertion.

[0124] Figure 15 shows a cross-sectional view of the connection portion 1200 according to another embodiment. For the sake of brevity, only the differences from the embodiment of Figure 10 are described. Other configurations can be found in Figure 10.

[0125] According to this embodiment, the connecting rod 1210 of the connecting portion 1200 is configured as an arc shape similar to the positioning portions 1220 on both sides, and the end 1111a of the strap body 1111 is fixed to the connecting rod 1210. A second clamp 1400 is provided on the connecting rod 1210, and the structure and operation of the second clamp 1400 are basically the same as those in FIG. 12. As a result, the fixing point of the strap body 1111 is close to the fixing point of the seat belt 1221, and the seat belt 1221 can provide additional fastening force to the backrest 1101 of the child safety seat 1001 to prevent sudden situations such as the strap body 1111 breaking.

[0126] In this embodiment, the positioning part can also be omitted, so that only the connecting rod 1210 is arc-shaped. The arc-shaped structure can effectively prevent the strap body from sliding and misaligning along the connecting part 1101. This disclosure is not limited thereto.

[0127] Figure 16 shows a cross-sectional view of the connecting portion 1220 according to another embodiment. Unlike Figure 15, the two ends 1111a of the strap body 1111 are respectively connected to the positioning portion 1220. Since the two ends 1111a are symmetrically fixed, the fixing force generated by the second clamp 1400 located in the middle of the connecting portion 1200 is close to the point of application of the force generated by the two ends 1111a of the strap body 1111. Furthermore, since the two ends 1111a are located on both sides of the main body 1100 backing onto 1101, a uniform and stable tension can be provided to both sides.

[0128] Figure 17 shows a cross-sectional view of the connecting portion 1220 according to another embodiment. Unlike Figure 10, the end 1111a of the strap body 1111 is located on the connecting rod 1210. Since the two second clamps 1400 are symmetrically arranged on the main body portion 1100 backing 1101, the tension generated by the end 1111a of the strap body 1111 located in the middle of the connecting portion 1200 is close to the point of application of the force generated by the two second clamps 1400. Furthermore, since the two second clamps 1400 are located on both sides of the main body portion 1100 backing 1101, they can provide a uniform and stable fixing force to both sides.

[0129] In some other embodiments, the first clamp 1300 can be omitted, leaving only two second clamps 1400. Alternatively, the first clamp 1300 can be replaced with a guide ring without a locking function to guide the sliding direction of the seat belt.

[0130] The beneficial technical effect of this disclosure is that when the child safety seat 1001 is fixed to the vehicle seat 1002 by the seat belt 1221, the connection point of the strap assembly 1011 is close to the second clamp 1400. When the vehicle comes to an unexpected sudden stop, the child safety seat 1001 will continue to move forward due to inertia. At this time, the strap assembly 1011 and the seat belt 1221 will pull the child safety seat 1001 together to prevent it from moving forward. Since the second clamp 1400 clamps the shoulder strap 1221a near the connection point of the strap assembly 1011, the shoulder strap 1221a of the seat belt 1221 will better share the pulling force with the strap assembly 1011, thereby reducing the force borne by the strap assembly 1011.

[0131] Referring to FIG18, a child safety seat 2400 according to a second embodiment of the present disclosure is described in general. The child safety seat 2400 includes a seat portion 2410 located below. A crotch strap 2200 is provided at the seat portion 2410, extending from the seat portion 2410 and connected to a buckle 2300. The buckle 2300 is connected to other safety belts of the child safety seat 2400 (e.g., shoulder straps and lap belts, not shown) to stably protect the child. The two ends of the crotch strap 2200 are respectively fixed to a crotch strap adjustment mechanism 2100. The buckle 2300 passes through the middle of the crotch strap 2200 and is slidable relative to the crotch strap 2200. Therefore, the length of the portion of the crotch strap 2200 exposed outside the housing of the seat portion 2410 defines the distance of the buckle 2300 relative to the seat portion 2410, and this portion of the crotch strap 2200 is referred to as the effective length. The crotch belt adjustment mechanism 2100 disclosed herein allows for adjustment of the effective length of the crotch belt 2200, thereby changing the position of the buckle 2300 to accommodate children of various sizes.

[0132] The crotch belt adjustment mechanism 2100 according to the present disclosure is further described with reference to Figures 19 and 20. The crotch belt adjustment mechanism 2100 includes a mounting base 2110, a positioning member 2120, a first engaging portion 2130, a second engaging portion 2140, a first fixing rod 2150, a second fixing rod 2160, and a moving rod 2170. In some embodiments, the first engaging portion 2130 and the second engaging portion 2140 are formed from the top surface of the seat portion 2410 of the child safety seat 2400, therefore the crotch belt adjustment mechanism 2100 also includes the top surface of the seat portion 2410. In other embodiments, the first engaging portion 2130 and the second engaging portion 2140 are formed as separate components, therefore the crotch belt adjustment mechanism 2100 does not include the seat portion 2410.

[0133] The mounting base 2110 of the crotch belt adjustment mechanism 2100 is mounted below the seat portion 2410, and the mounting base 2110 will be described in detail below. The two ends of the crotch belt 2200 pass through two parallel openings 2411 in the seat portion 2410 and are fixed to the mounting base 2110. The two openings 2411 are spaced apart, and an operating port 2412 is formed between the two openings 2411.

[0134] A positioning element 2120 of the crotch strap adjustment mechanism 2100 is disposed between the seat portion 2410 and the mounting base 2110, and at least a portion of the positioning element 2120 is exposed on the outside of the seat portion 2410 through an operating port 2412 for operation by a caregiver. The positioning element 2120 is laterally movable relative to the seat portion 2410 and positioned in multiple locations to adjust the effective length of the crotch strap 2200. A portion of the housing of the seat portion 2410 (e.g., the upper surface) forms a first engaging portion 2130 and a second engaging portion 2140 to engage the positioning element 2120 when it is moved to the right side (hereinafter referred to as the first position) and the left side (hereinafter referred to as the second position) of the operating port 2412 of the seat portion 2410, respectively. In other embodiments, the first engaging portion 2130 and the second engaging portion 2140 may be formed as separate components and mounted to the seat portion 2410.

[0135] The crotch belt adjustment mechanism 2100 according to the present disclosure is further described with reference to Figures 20 to 23. Figures 20 and 21 show the positioning member 2120 in a first position (i.e., right side), and Figures 22 and 23 show the positioning member 2120 in a second position (i.e., left side). The crotch belt 2200 includes a first segment 2210 and a second segment 2220 connected to each other. The first segment 2210 is the portion extending from the buckle 2300 to the first fixing rod 2150, and the second segment 2220 is the portion extending from the buckle 2300 to the second fixing rod 2160. The buckle 2300 is connected between the first segment 2210 and the second segment 2220. It should be understood that the first segment 2210 and the second segment 2220 can be a single belt, and the buckle 2300 is slidable along the first segment 2210 and the second segment 2220. Therefore, the range of the first segment 2210 and the second segment 2220 can be varied.

[0136] The crotch strap adjustment mechanism 2100 also includes a first fixing rod 2150 and a second fixing rod 2160 fixed to the mounting base 2110, and a moving rod 2170 fixed to the positioning member 2120. The first segment 2210 and the second segment 2220 of the crotch strap 2200 each have a first end 2260 and a second end 2270 respectively located away from the buckle 2300. The first end 2260 of the first segment 2210 and the second end 2270 of the second segment 2220 are connected to the mounting base 2110. More specifically, the first segment 2210 and the second segment 2220 respectively pass through the opening 2411 of the seat portion 2410 (see FIG. 19), such that the first end 2260 and the second end 2270 are respectively fixed to the first fixing rod 2150 and the second fixing rod 2160. For example, the first end 2260 and the second end 2270 can be wound around the first fixing rod 2150 and the second fixing rod 2160 respectively, and then sewn to the first section 2210 and the second section 2220 respectively, thereby forming a cylinder sleeved on the first fixing rod 2150 and the second fixing rod 2160.

[0137] The first segment 2210 extends from the buckle 2300 into the interior of the seat 2410. Its first end 2260 first passes through the opening 2411 of the seat 2410, then around the moving rod 2170, and then connects to the first fixed rod 2150, such that at least a portion of the first segment 2210 forms an overlapping segment 2225, the length of which is approximately equal to the distance between the moving rod 2170 and the first fixed rod 2150. If the portion of the crotch strap 2200 wrapped around the first fixed rod 2150 and the second fixed rod 2160 is ignored, the total length of the crotch strap 2200 (i.e., the sum of the lengths of the first segment 2210 and the second segment 2220) is constant. The effective length of the crotch strap 2200 is the length of the straightened crotch strap 2200 extending from the first opening 2413 to the buckle 2300 and then from the buckle 2300 to the second opening 2414 when the buckle 2300 is fastened. The length of the overlapping section 2225 of the crotch strap 2200 is L, and the effective length can be roughly calculated as total length - 2L. Therefore, when the positioning member 2120 moves between the first position and the second position, the length L of the overlapping section 2225 changes, thereby changing the effective length of the crotch strap 2200.

[0138] More specifically, in the first position shown in Figures 20 and 21, the positioning member 2120 is close to the first fixing rod 2150, resulting in a smaller length L of the overlapping section 2225. Therefore, the effective length of the crotch strap 2200 is larger, and the distance between the buckle 2300 and the seat 2410 is larger. In the second position shown in Figures 22 and 23, the positioning member 2120 is close to the second fixing rod 2160, resulting in a larger length L' of the overlapping section 2225. Therefore, the effective length of the crotch strap 2200 is smaller, and the distance between the buckle 2300 and the seat 2410 is smaller.

[0139] The positioning member 2120 includes an operating portion 2121, a first positioning portion 2122 and a second positioning portion 2123 located on both sides of the operating portion 2121, i.e., the first positioning portion 2122 and the second positioning portion 2123 are opposite to each other along the sliding direction of the positioning member 2120. A first engaging portion 2130 and a second engaging portion 2140 are arranged opposite each other laterally. The first engaging portion 2130 and the second engaging portion 2140 are located on the left and right sides of the operating port 2412 and between the two openings 2411. The positioning member 2120 is exposed outside the seat portion 2410 through the operating port 2412 between the first engaging portion 2130 and the second engaging portion 2140 for operation. In the second position shown in Figures 22 and 23, the operating portion 2121 and the first positioning portion 2122 of the positioning member 2120 are exposed outside the seat portion 2410. At the first position shown in Figures 20 and 21, the operating part 2121 and the second positioning part 2123 of the positioning member 2120 are exposed outside the seat part 2410.

[0140] The first positioning portion 2122 includes an outer engagement point 2122c and a ramp 2122a. The outer engagement point 2122c is located at the end of the first positioning portion 2122 away from the operating portion 2121, that is, at the outer end of the first positioning portion 2122 along the sliding direction, and the outer engagement point 2122c is formed as a vertically extending wall. The ramp 2122a extends downwardly from the outer engagement point 2122c toward the center of the positioning member 2120. The ramp 2122a facilitates the operation of the positioning member 2120; however, the ramp 2122a is not essential. In other embodiments, the first positioning portion 2122 can extend horizontally from the operating portion 2121 to the outer engagement point 2122c, and the outer engagement point 2122c extends vertically from the first positioning portion 2122. In other embodiments, the first positioning part 2122 may further include an inner engagement point 2122b, which is formed on the inclined surface 2122a at a position near the operating part 2121.

[0141] Accordingly, the second positioning part 2123 includes an outer engagement point 2123c and an inclined surface 2123a, and may also include an inner engagement point 2123b. The first positioning part 2122 and the second positioning part 2123 may be formed symmetrically to each other.

[0142] The first engaging portion 2130 includes a top wall 2131, an inner side wall 2133, and an outer side wall 2132. The top wall 2131 extends generally horizontally and may be formed from a portion of the top surface of the seat portion 2410. The inner side wall 2133 extends obliquely downward from the inner end of the top wall 2131 near the operating portion 2121, and the outer side wall 2132 extends downward from the outer end of the top wall 2131 away from the operating portion 2121. Therefore, the top wall 2131, the inner side wall 2133, and the outer side wall 2132 together form a downwardly recessed shape. The length of the inner side wall 2133 may be less than the length of the outer side wall 2132. Correspondingly, the second engaging portion 2140 includes a top wall 2141, an outer side wall 2142, and an inner side wall 2143. The first engaging portion 2130 and the second engaging portion 2140 may be formed symmetrically to each other. The extension directions of the inner sidewalls 2133 and 2143 are closer to vertical than the extension directions of the inclined surfaces 2122a and 2123a. That is, the inner sidewalls 2133 and 2143 are steeper, while the inclined surfaces 2122a and 2123a are gentler. This structure is conducive to the elastic deformation of the first positioning part 2122 and the second positioning part 2123 by abutting against the inner sidewalls 2133 and 2143.

[0143] When the positioning member 2120 is in the second position shown in Figures 22 and 23, the outer engagement point 2122c of the first positioning part 2122 abuts against the inner sidewall 2133 (specifically the left side of the inner sidewall 2133) of the first engagement part 2130, and the operating part 2121 can abut against the inner sidewall 2133 (specifically the right side of the inner sidewall 2133) of the first engagement part 2130, thereby assisting in holding the positioning member 2120 in the second position.

[0144] In other embodiments, when the positioning member 2120 is in the second position, the outer engagement point 2122c of the first positioning part 2122 abuts against the outer wall 2132 (specifically the left side of the inner wall 2133) of the first engagement part 2130, and the outer engagement point 2123c of the second positioning part 2123 abuts against the outer wall 2142 (specifically the left side of the outer wall 2142) of the second engagement part 2140. Therefore, the left and right sides of the positioning member 2120 are abutted by the first positioning part 2122 and the second positioning part 2123 respectively, thereby positioning it in the second position. In other embodiments, when the positioning member 2120 is in the second position, the inner wall 2143 of the second engagement part 2140 engages with the inner engagement point 2123b of the second positioning part 2123, thereby assisting in holding the positioning member 2120 in the second position.

[0145] When the caregiver needs to move the positioning member 2120 from the second position to the first position, they can press down on the first positioning part 2122, causing it to elastically deform. The outer engagement point 2122c of the first positioning part 2122 passes downwards over the inner sidewall 2133 of the first engagement part 2130, and the operating part 2121 pushes the positioning member 2120 to the right. At this time, the first engagement part 2130 no longer prevents the first positioning part 2122 from moving to the right (i.e., toward the first position), allowing it to move from the operating opening 2412 between the first engagement part 2130 and the second engagement part 2140 into the groove of the first engagement part 2130. Therefore, the caregiver can move the positioning member 2120 to the first position. During this process, the inclined surface 2123a of the second positioning part 2123 can abut against the inner wall 2143 of the second engaging part 2140, causing the second positioning part 2123 to undergo elastic deformation to pass over the second engaging part 2140 and reach the operating opening 2412 between the first engaging part 2130 and the second engaging part 2140. The process of moving the positioning member 2120 from the first position to the second position is the reverse of the above process.

[0146] It should be understood that when the positioning member 2120 is in the first position, the outer engagement point 2122c of the first positioning part 2122 abuts against the outer sidewall 2132 of the first engagement part 2130, and the outer engagement point 2123c of the second positioning part 2123 abuts against the inner sidewall 2143 of the second engagement part 2140. In other embodiments, the operating member can abut against the inner sidewall 2143 of the second engagement part 2140, and the inner sidewall 2133 of the first engagement part 2130 can engage with the inner engagement point 2122b of the first positioning part 2122, thereby assisting in holding the positioning member 2120 in the first position.

[0147] The description of the crotch belt adjustment mechanism 2100 according to this disclosure continues with reference to FIG24.

[0148] The mounting base 2110 is generally box-shaped and opens upwards. A first rod mounting portion 2113 and a second rod mounting portion 2114 are respectively provided at both lateral ends of the mounting base 2110, both of which are upward-opening grooves. A first fixing rod 2150 and a second fixing rod 2160 are respectively fixed to the first rod mounting portion 2113 and the second rod mounting portion 2114 (see Figure 27). Guide portions 2117 are provided on the left and right sides of the mounting base 2110. Each guide portion 2117 is configured as a strip extending longitudinally and is respectively located on the lateral inner side of the first rod mounting portion 2113 and the second rod mounting portion 2114. Referring to Figure 21, the cross-section of each guide portion 2117 can be bent to enhance structural strength. A gap exists between each guide portion 2117 and the bottom wall 2115 of the mounting base 2110 so that the first segment 2210 and the second segment 2220 of the groin strap 2200 pass under the guide portion 2117. Therefore, the first segment 2210 and the second segment 2220 pass through the gap between the guide portion 2117 and the bottom wall 2115 from the first fixing rod 2160 and the second fixing rod 2170, respectively, and then extend from the opening 2411 to above the seat 2410. The guide portion 2117 advantageously guides the extension path of the crotch strap 2200 and increases the friction between the crotch strap 2200 and the crotch strap adjustment mechanism 2100, so that the crotch strap 2200 is stably fixed to the crotch strap adjustment mechanism 2100.

[0149] The positioning element 2120 is disposed in the mounting base 2110 and can slide laterally relative to the mounting base 2110. More specifically, the mounting base 2110 is fixed to the underside of the top surface of the seat portion 2410 by mounting portions 2116 at its four corners (see Figure 19), for example, by bolts. Therefore, an accommodating space is formed between the bottom wall 2115 of the mounting base 2110 and the top surface of the seat portion 2410, in which the positioning element 2120 slides.

[0150] The positioning member 2120 includes a first sliding rib 2124 and a second sliding rib 2125, which extend along the moving direction (i.e., laterally) of the positioning member 2120 and are disposed on opposite sides (i.e., longitudinally) of the positioning member 2120. More specifically, the first sliding rib 2124 and the second sliding rib 2125 are respectively laterally extending strips and are connected to the operating portion 2121 of the positioning member 2120 at their respective middle positions. Notches 2124a and 2125a are respectively provided at the center of the side surfaces of the first sliding rib 2124 and the second sliding rib 2125. The positioning member 2120 includes a first receiving portion 2126 and a second receiving portion 2127 disposed below the operating portion 2121, which respectively receive the two ends of the moving rod 2170 (see Figure 26). The notches 2124a and 2125a of the first sliding rib 2124 and the second sliding rib 2125 facilitate the installation of the moving rod 2170 into the positioning member 2120. However, it should be understood that in other embodiments, the moving rod 2170 and the positioning member 2120 may be integrally formed.

[0151] The first sliding rib 2124 and the second sliding rib 2125 extend along the entire length of the positioning member 2120. That is, the lengths of the first sliding rib 2124 and the second sliding rib 2125 are approximately equal to the sum of the lengths of the first positioning portion 2122, the second positioning portion 2123, and the operating portion 2121. Therefore, the entire positioning member 2120 is approximately rectangular. Gaps 2128 are formed between the first positioning portion 2122 and the first sliding rib 2124 and the second sliding rib 2125, respectively, so that the first positioning portion 2122 can undergo elastic deformation when pressed. Similarly, gaps 2128 are formed between the second positioning portion 2123 and the first sliding rib 2124 and the second sliding rib 2125, respectively.

[0152] It should be understood that the first sliding rib 2124 and the second sliding rib 2125 are respectively accommodated in the first sliding groove 2111 and the second sliding groove 2112 of the mounting base 2110, and therefore are not easily moved or deformed in the vertical (up-down direction). As described above, during the movement of the positioning member 2120 between the first position and the second position, the first positioning part 2122 and the second positioning part 2123 need to move up and down to pass over the first engaging part 2130 and the second engaging part 2140. Thanks to the gap 2128 between the first positioning part 2122, the second positioning part 2123 and the first sliding rib 2124, the second sliding rib 2125, the first positioning part 2122 and the second positioning part 2123 can elastically deform in the vertical direction without being restricted by the first sliding rib 2124 and the second sliding rib 2125, which are difficult to move up and down. That is, although the positioning element 2120 of this disclosure is a single integral component, it has multiple parts that can be elastically deformed independently of each other, thereby realizing the movement and engagement functions of the positioning element 2120.

[0153] The first positioning part 2122 and the second positioning part 2123 each include at least one protrusion 2122d and 2123d, and each protrusion 2122d and 2123d extends laterally outward from the corresponding outer engagement points 2122c and 2123c of the first positioning part 2122 and the second positioning part 2123. More specifically, these protrusions 2122d and 2123d extend into the gap 2128 between the first positioning part 2122, the second positioning part 2123 and the first sliding rib 2124 and the second sliding rib 2125.

[0154] Referring to Figures 25 and 26, which show the bottom surface of the positioning member 2120, the first receiving portion 2126 and the second receiving portion 2127 are clearly visible. These two receiving portions are cylindrical and located at both longitudinal ends of the positioning member 2120. The moving rod 2170 connected to the first receiving portion 2126 and the second receiving portion 2127 is also clearly visible.

[0155] Referring to FIG27, the description of the crotch belt adjustment mechanism 2100 according to the present disclosure continues, wherein a portion of the crotch belt 2200 has been removed to clearly show the other components. A first rod mounting portion 2113 and a second rod mounting portion 2114 are respectively located on the lateral sides of the mounting base 2110, and a first fixing rod 2150 and a second fixing rod 2160 are respectively disposed therein. The lateral dimension of the mounting base 2110 is larger than the lateral dimension of the positioning member 2120 to allow lateral movement of the positioning member 2120.

[0156] Referring to Figure 28, it is clearly shown that the first end 2260 and the second end 2270 of the crotch strap 2200 are wound around the first fixed rod 2150 and the second fixed rod 2160, respectively, and the first section 2210 of the crotch strap 2200 is wound around the moving rod 2170. In this embodiment, the first fixed rod 2150, the second fixed rod 2160, and the moving rod 2170 are all perpendicular to the moving direction of the positioning member 2120, that is, they extend longitudinally to facilitate the winding of the crotch strap 2200.

[0157] A child safety seat according to a third embodiment of the present disclosure is described generally with reference to Figures 29 and 30. The child safety seat 2400 includes a seat portion 2410 and a base 2420 located below the seat portion. A crotch strap 2200 is provided at the seat portion 2410, extending from the seat portion 2410 and connected to a buckle 2300. The buckle 2300 connects to other safety belts (e.g., shoulder straps and lap belts, not shown) of the child safety seat 2400 to stably restrain the child in the seat.

[0158] The two ends of the crotch strap 2200 are respectively fixed to the crotch strap adjustment mechanism 2500. The buckle 2300 passes through the middle of the crotch strap 2200 and can slide relative to the crotch strap 2200. Therefore, the length of the portion of the crotch strap 2200 exposed outside the housing of the seat 2410 defines the distance of the buckle 2300 relative to the seat 2410; this portion of the crotch strap 2200 is referred to as the effective length. The effective length of the crotch strap 2200 can be adjusted by the crotch strap adjustment mechanism 2500 of this disclosure, thereby changing the position of the buckle 2300 to accommodate children of different sizes.

[0159] The crotch belt adjustment mechanism 2500 is further described with reference to Figures 31 and 32. The crotch belt adjustment mechanism 2500 includes a first positioning member 2510 and a second positioning member 2520, which are respectively located below the top surface of the seat portion 2410. The top surface of the seat portion 2410 has a first opening 2413 and a second opening 2414, which are arranged laterally.

[0160] The crotch strap 2200 includes a first segment 2210, a second segment 2220, a third segment 2230, a fourth segment 2240, and a fifth segment 2250 connected sequentially to each other. A first end 2260 is located in the first segment 2210, and a second end 2270 is located in the fifth segment 2250. The first end 2260 is a fixed end, capable of being fixedly connected to the seat portion 2410 or the first positioning member 2510 (described later). The second end 2270 is a free end, allowing the caregiver to freely adjust its length relative to the housing of the seat portion 2410, thereby adjusting the effective length of the crotch strap 2200. Exemplarily, the first end 2260 of the crotch strap 2200 can pass through a first opening 2413 and connect to the first positioning member 2510, and the second end 2270 of the crotch strap 2200 can pass through a second opening 2414 and connect to the second positioning member 2520. Both the first positioning member 2510 and the second positioning member 2520 are located inside the housing of the seat portion 2410. The shapes of the first opening 2413 and the second opening 2414 are configured to allow the crotch strap 2200 to pass through but not the first positioning member 2510 or the second positioning member 2520 to pass through.

[0161] For example, either the first opening 2413 or the second opening 2414 can be configured as an elongated hole extending longitudinally (referring to FIG29) and can have a downwardly tapering cross-section. More specifically, the first opening 2413 has a trapezoidal cross-section and a larger area on the side away from the first positioning member 2510 and a smaller area on the side closer to the first positioning member 2510; and / or the second opening 2414 has a trapezoidal cross-section and a larger area on the side away from the second positioning member 2520 and a smaller area on the side closer to the second positioning member 2520.

[0162] Thanks to the structure of the first opening 2413 and the second opening 2414, when the first positioning member 2510 and the second positioning member 2520 are in the form of sheets, they can pass vertically through the first opening 2413 and the second opening 2414 to reach below the top surface of the seat 2410, and then rotate to the side to be stopped by the edges of the first opening 2413 and the second opening 2414. In this way, the first positioning member 2510 and the second positioning member 2520 can be easily installed into the seat 2410.

[0163] In this embodiment, the first end 2260 of the crotch strap 2200 is fixedly connected to the first positioning member 2510, and the second end 2270 of the crotch strap 2200 is adjustablely connected to the second positioning member 2520 to adjust the length of the crotch strap 2200, i.e., the effective length of the crotch strap 2200 exposed above the seat portion 2410. In other embodiments, the first end 2260 of the crotch strap 2200 may be adjustablely connected to the first positioning member 2510, and the second end 2270 may be fixedly connected to the second positioning member 2520. Alternatively, the first end 2260 and the second end 2270 of the crotch strap 2200 may be adjustablely connected to the first positioning member 2510 and the second positioning member 2520, respectively.

[0164] In this embodiment, the first positioning member 2510 is frame-shaped with a central rod 2511. The first end 2260 of the crotch strap 2200 is wound around and fixed to the central rod 2511 of the first positioning member 2510. "Fixed" here means that the first end 2260 is connected to the first positioning member 2510 in a non-adjustable manner. In this embodiment, the first end 2260 has a sleeve structure, passing through the first opening 2413 from above the top surface and fitting onto the central rod 2523. In other embodiments, the first end 2260 can be fixed to the first positioning member 2510 in other ways, such as by buttons, knots, or stitching. Exemplarily, the first positioning member 2510 is inserted into the lower part of the housing of the seat portion 2410, thereby being fixedly connected to the seat portion 2410. The first positioning element 2510 can be a metal D-ring buckle, trapezoidal buckle, frame shape with the middle rod removed, or other forms such as a fastener, and can be integrated with the seat 2410.

[0165] The specific structure of the second positioning member 2520 is described with reference to Figures 32 and 33. The second positioning member 2520 is frame-shaped and has a central rod 2523. The central rod 2523 extends longitudinally, forming a first gap 2521 and a second gap 2522 with the two longitudinal side frames, respectively. The second positioning member 2520 has two laterally extending transverse sides 2524, and the two ends of the central rod 2523 are respectively connected to the middle of the two transverse sides 2524. The middle of the transverse sides 2524 can be curved and concave, so that the second positioning member 2520 as a whole is arc-shaped, low in the middle and high at both ends. That is, in the cross-section perpendicular to the central rod 2523 shown in Figure 31, the second positioning member 2520 is a concave arc shape. This arc shape helps to increase the contact area between the crotch strap 2200 and the second positioning member 2520, thereby increasing the friction between them and ensuring a stable connection between the crotch strap 2200 and the second positioning member 2520.

[0166] The second segment 2220, the third segment 2230, the fourth segment 2240, and the fifth segment 2250 of the crotch strap 2200 are wound around the second positioning member 2520. Specifically, the second segment 2220 of the crotch strap 2200 extends from the upper side of the second positioning member 2520 through the first gap 2521 to the lower side of the second positioning member 2520, the third segment 2230 extends from the outer side of the second positioning member 2520 to the upper side of the second positioning member 2520, the fourth segment 2240 extends through the second gap 2522 to the lower side of the second positioning member 2520, and the fifth segment 2250 extends through the first gap 2521 to the upper side of the second positioning member 2520. Therefore, the portion of the fourth segment 2240 located below the second positioning member 2520 is positioned between the positioning member and the third segment 2230, and the portion of the fifth segment 2250 passing through the first gap 2521 is positioned between the intermediate rod 2523 and the second segment 2220, so that there is contact between the multiple segments of the crotch strap 2200 to generate a frictional force sufficient to hold the crotch strap 2200.

[0167] Optionally, referring to FIG31, the inner surface of the housing of the seat portion 2410 further has a plurality of protruding ribs 2418. The extending direction of the ribs 2419 is parallel to the extending direction of the first opening 2413 and the second opening 2414, and is distributed on both sides of the first opening 2413 and the second opening 2414, thereby enhancing the mechanical strength of the housing near the first opening 2413 and the second opening 2414, and preventing the first positioning member 2510 and the second positioning member 2520 from sliding out of the corresponding openings. Exemplarily, the edge of the first opening 2413 along the length direction forms a first rib group 2418a that approaches each other from top to bottom, and a second rib group 2418b is provided at intervals on the outer side of the first rib group 2418a, that is, a groove is formed between the first rib group 2418a and the second rib group 2418b on each side of the first opening 2413. Similarly, the second opening 2414 has a third rib group 2418c on both sides and a fourth rib group 2418d located outside the third rib group. When the second positioning member 2520 (or the first positioning member 2510) is flipped relative to the surface of the seat 2410, the hip strap 2200 is pulled upward, and the edge of the second positioning member 2520 will engage in the groove between the third rib group 2418c and the fourth rib group 2418d, thereby preventing the second positioning member 2520 from sliding out of the second opening 2414.

[0168] It should be understood that the first segment 2210, the second segment 2220, the third segment 2230, the fourth segment 2240, and the fifth segment 2250 described herein are for ease of description and understanding of the structure of the crotch strap 2200. The crotch strap 2200 is a complete and continuous strap, and the position and length of each segment may change as the crotch strap 2200 slides and is adjusted. When the user needs to reduce the effective length of the crotch strap 2200, the second segment 2220 can be moved downward through the first gap 2521, and then the fifth segment 2250 can be moved upward, thereby reducing the length of the crotch strap 2200 exposed above the seat 2410 and increasing the length of the crotch strap 2200 hidden in the seat 2410.

[0169] Conversely, when the user needs to increase the effective length of the crotch strap 2200, the fifth segment 2250 can be moved downward through the first gap 2521, and the second segment 2220 can be moved upward, thereby increasing the length of the crotch strap 2200 exposed above the seat 2410 and decreasing the length of the crotch strap 2200 hidden in the seat 2410. Therefore, the effective length of the crotch strap 2200 can be easily adjusted by the second positioning member 2520.

[0170] The child safety seat 2400 according to the present disclosure is further described with reference to Figures 34 and 35. The seat portion 2410 has a first operating port 2415 and a second operating port 2416 below it. A first positioning member 2510 and a second positioning member 2520 protrude from the first operating port 2415 and the second operating port 2416, respectively, to allow operation of the first positioning member 2510 and the second positioning member 2520 from outside the seat portion 2410. The seat portion 2410 is connected to a base 2420 and is adjustable relative to the base 2420 between an upright position shown in Figure 34 and a supine position shown in Figure 35. When the seat portion 2410 is in the upright position, the first operating port 2415 and the second operating port 2416 are covered by the base 2420, giving the child safety seat 2400 a neat appearance and preventing accidental operation. When the seat portion 2410 is in the supine position, the first operating port 2415 and the second operating port 2416 are exposed outside the base 2420. At this point, the user can adjust the position of the crotch strap 2200 wound around the second positioning member 2520, thereby changing the effective length of the crotch strap 2200. The user can also connect the first positioning member 2510 and the second positioning member 2520 to the seat 2410 or remove them from the seat 2410. Optionally, the first operating port 2415 and the second operating port 2416 can be an integral cavity.

[0171] Referring to Figure 36, a cover 2417 may also be provided below the seat 2410. The cover 2417 covers the first operating port 2415 and the second operating port 2416, and can be removed to expose the first operating port 2415 and the second operating port 2416. The seat belt 2430 (shoulder strap) of the child safety seat 2400 passes under the seat 2410, and the cover 2417 separates the crotch strap from the seat belt 2430 to prevent interference between the two. For example, the cover 2417 is a flexible sheet material with buttons or Velcro at its edges or corners for attaching to the bottom surface of the seat 2410 to cover the first operating port 2415 and the second operating port 2416.

[0172] Since this disclosure can be embodied in various forms without departing from the spirit and substance of this disclosure, 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 child safety seat (1001), characterized in that... include: Seat body (1010), used to carry children; A connecting part (1200) is provided on the seat body; The tether assembly (1011) has one end fixed to the connecting portion (1200) and the other end provided with an anchoring portion (1112) for connecting to the vehicle seat (1002); and A second clamp (1400), which is disposed on the connecting part (1200), is used to operably lock the vehicle's seat belt (1221).

2. The child safety seat (1001) according to claim 1, characterized in that, The seat body (1010) includes a seat (1102) and a backrest (1101), and the connecting part (1200) is protruding from the top of the backrest (1101). The backrest (1101) includes a first clamp (1300) located on the front or side of the backrest (1101) for operably locking the seat belt (1221).

3. The child safety seat (1001) according to claim 2, characterized in that: The connecting part (1200) is a long rod, with its two ends connected to the seat body (1010), wherein, There are multiple second clamps (1400), and the second clamps (1400) are respectively provided at both ends of the connecting part (1200).

4. The child safety seat (1001) according to any one of claims 1-3, characterized in that, The second clamp (1400) includes: A clamp (1410) is provided on the connecting part (1200). A clamping arm (1420), which is pivotally mounted on the clamping seat (1410); and A locking member (1424) is movably disposed between the clamping seat (1410) and the clamping arm (1420), and the locking member (1424) has a locked position and an unlocked position. When the locking member (1424) is in the locked position, the locking member (1424) locks the clamping arm (1420) onto the clamping seat (1410), thereby clamping the seat belt (1221) in the second clamp (1400).

5. The child safety seat (1001) according to claim 4, characterized in that, The second clamp (1400) also includes: A release mechanism (1422) is movably disposed on the clamp (1410) or the clamp arm (1420). The release mechanism (1422) is coupled to the engaging member (1424) to drive the engaging member (1424) to move between the locked position and the release position; and The elastic element (1425) applies a bias to the engaging element (1424) to move toward the locked position.

6. The child safety seat (1001) according to claim 5, characterized in that: The release operation member (1422) and the engaging member (1424) are pivotally connected to the clamping arm (1420). The engaging member (1424) has a protruding abutment (1424b), and the release operation member (1422) has a U-shaped driving rib (1422a). The abutment (1424b) engages with the driving rib (1422a) so that the release operation member (1422) and the engaging member (1424) move as a unit. The elastic element (1425) is located between the release operation element (1422) and the clamping arm (1420). Under the bias of the elastic element (1425), the release operation element (1422) pushes the locking element (1424) in the locking position direction.

7. The child safety seat (1001) according to claim 4, characterized in that: One of the clamping arm (1420) and the clamping seat (1410) is provided with a protruding rib, and the other is provided with a groove for accommodating the protruding rib, wherein the protruding rib is formed with a toothed structure.

8. The child safety seat (1001) according to claim 4, characterized in that: The second clamp (1400) further includes two connectors (1430), which connect the second clamp (1400) and the connecting part (1200) respectively. The clamp (1410) is arc-shaped, and a gap is formed between the clamp (1410), the two connectors (1430) and the connecting part (1200), thereby limiting the strap assembly (1011) in the connecting part (1200).

9. The child safety seat (1001) according to claim 1, characterized in that, The seat body (1010) includes: Seat (1102), which is used to support children; A backrest (1101) connected to the seat (1102), the backrest (1101) being used to support the child's back; and Two side wings (1103) are respectively connected to both sides of the backrest (1101). The fixing part of the seat belt (1221) includes a first clamp (1300) for operably locking the seat belt (1221), the first clamp (1300) being disposed on the side wing (1103) or the backrest (1101), and the second clamp (1400) being positioned higher than the first clamp (1300).

10. The child safety seat (1001) according to claim 9, characterized in that: The side wing (1103) includes a through portion (1103a) that extends along the seat height direction on the side wing (1103) for threading the seat belt (1221). The first clamp (1300) is disposed at the top end of the through portion (1103a), and the bottom end of the through portion (1103a) is provided with a protrusion (1103b) for guiding the seat belt (1221); The first clamp (1300) includes a fixed base (1310), a clamp (1320), and a pivot (1330). The fixed base (1310) is fixedly connected to the through portion (1103a), and the clamp (1320) rotates about the pivot (1330) to clamp the seat belt (1221).

11. A child safety seat (2400), characterized in that, include: The seat (2410) has two openings (2411) spaced apart; A crotch belt adjustment mechanism (2100) is installed on the seat (2410); as well as A crotch strap (2200) having a first end (2260) and a second end (2270), the first end (2260) passing through one of the two openings and the second end (2270) passing through the other of the two openings, the first end (2260) and the second end (2270) being connected to the crotch strap adjustment mechanism (2100); The crotch belt adjustment mechanism (2100) includes: The mounting base (2110) has a first fixing part (2150) and a second fixing part (2160) spaced apart, the first end (2260) of the crotch strap (2200) is connected to the first fixing part (2150), and the second end (2270) of the crotch strap (2200) is connected to the second fixing part (2160); and A positioning element (2120) is slidably mounted on the mounting base, the first end of the crotch strap (2200) is wrapped around the positioning element (2120), and the positioning element (2120) is movable relative to the child safety seat (2400) between a first position and a second position to adjust the length of the crotch strap (2200); The seat (2410) includes a first engaging portion (2130) and a second engaging portion (2140); The positioning member (2120) includes a first positioning part (2122) and a second positioning part (2123), the first positioning part (2122) and the second positioning part (2123) being opposite to each other along the sliding direction of the positioning member (2120); When the positioning member (2120) is in the first position, the first positioning part (2122) engages with the first engaging part (2130); when the positioning member (2120) is in the second position, the second positioning part (2123) engages with the second engaging part (2140).

12. The child safety seat (2400) according to claim 11, characterized in that: The first positioning unit (2122) and the second positioning unit (2123) respectively include external engagement points (2122c, 2123c); The outer engagement points (2122c, 2123c) are respectively formed at the outer ends of the first positioning part (2122) and the second positioning part (2123) along the sliding direction, and are respectively formed as vertically extending walls.

13. The child safety seat (2400) according to claim 11, characterized in that: The first engaging portion (2130) and the second engaging portion (2140) respectively include a top wall (2131, 2141), an outer wall (2132, 2142) and an inner wall (2133, 2143). The inner walls (2133, 2143) extend downward obliquely from the inner end of the corresponding top wall (2131, 2141), and the outer walls (2132, 2142) extend downward from the outer end of the corresponding top wall (2131, 2141). When the positioning member (2120) is in the first position, the outer engagement point (2122c) of the first positioning part (2122) abuts against the outer sidewall (2132) of the first engagement part (2130), and the outer engagement point (2123c) of the second positioning part (2123) abuts against the inner sidewall (2143) of the second engagement part (2140). When the positioning member (2120) is in the second position, the outer engagement point (2122c) of the first positioning part (2122) abuts against the inner sidewall (2133) of the first engagement part (2130), and the outer engagement point (2123c) of the second positioning part (2123) abuts against the outer sidewall (2142) of the second engagement part (2140).

14. The child safety seat (2400) according to claim 11, characterized in that: The positioning element (2120) includes an operating part (2121), which is located between the first positioning part (2122) and the second positioning part (2123); An operating port (2412) is formed between the first engaging portion (2130) and the second engaging portion (2140). The operating portion (2121) is exposed through the operating port (2412) and can move within the range of the operating port (2412).

15. The child safety seat (2400) according to claim 11, characterized in that: The first positioning part (2122) and the second positioning part (2123) each include inclined surfaces (2122a, 2123a), and the inclined surfaces (2122a, 2123a) extend downward at an incline from the corresponding external engagement points (2122c, 2123c) toward the center of the positioning member (2120); The first engaging portion (2130) and the second engaging portion (2140) respectively include a top wall (2131, 2141), an outer wall (2132, 2142) and an inner wall (2133, 2143). The inner walls (2133, 2143) extend downward at an incline from the corresponding top wall (2131, 2141), and the extension direction of the inner walls (2133, 2143) is closer to the vertical direction than the extension direction of the inclined surfaces (2122a, 2123a).

16. The child safety seat (2400) according to claim 11, characterized in that: The crotch belt adjustment mechanism (2100) includes a first fixing rod (2150) and a second fixing rod (2160) fixed to the mounting base (2110), and a moving rod (2170) fixed to the positioning member (2120); The crotch strap (2200) includes a first segment (2210) and a second segment (2220) connected to each other, wherein the first end (2260) of the first segment (2210) and the second end (2270) of the second segment (2220) are respectively fixed to the first fixing rod (2150) and the second fixing rod (2160); The first segment (2210) bypasses the moving rod (2170) such that at least a portion of the first segment (2210) forms an overlapping segment (2225), and the length of the overlapping segment (2225) changes when the positioning member (2120) moves between the first position and the second position, so as to change the effective length of the crotch strap (2200); The moving rod (2170) is perpendicular to the moving direction of the positioning member (2120), and the two ends of the moving rod (2170) are respectively fixed to the first receiving part (2126) and the second receiving part (2127) at the bottom surface of the positioning member (2120).

17. A child safety seat (2400), characterized in that, include: The seat (2410) has a first opening (2413) and a second opening (2414) spaced apart; A crotch strap adjustment mechanism (2500) is mounted on the seat (2410) and includes a first positioning member (2510) and a second positioning member (2520); and A crotch strap (2200) has a first end (2260) and a second end (2270), the first end (2260) and the second end (2270) passing through a first opening (2413) and a second opening (2414) respectively, and connected to a first positioning member (2510) and a second positioning member (2520) respectively. The first positioning member (2510) is located below the first opening (2413), and the second positioning member (2520) is located below the second opening (2414). The second end (2270) is adjustablely connected to the second positioning member (2520) to adjust the length of the crotch strap (2200).

18. The child safety seat (2400) according to claim 17, characterized in that: The second positioning member (2520) has a frame-shaped structure with a middle rod (2523), and the second end (2270) is wound around the middle rod (2523) to adjust the length of the crotch strap (2200). The crotch strap (2200) includes a second section (2220), a third section (2230), a fourth section (2240), and a fifth section (2250) connected in sequence, and the second positioning member (2520) includes a first gap (2521) and a second gap (2522) located on both sides of the intermediate rod (2523); The second segment (2220) extends from the upper side of the second positioning member (2520) through the first gap (2521) to the lower side of the second positioning member (2520), the third segment (2230) extends from the outer side of the second positioning member (2520) to the upper side of the second positioning member (2520), the fourth segment (2240) extends through the second gap (2522) to the lower side of the second positioning member (2520), and the fifth segment (2250) extends through the first gap (2521) to the upper side of the second positioning member (2520).

19. The child safety seat (2400) according to claim 18, characterized in that: The middle part of the second positioning member (2520) is recessed downward, so that the second positioning member (2520) is an arc shape with a low middle and high ends.

20. The child safety seat (2400) according to claim 17, characterized in that: The child safety seat (2400) also includes a base (2420), and the seat portion (2410) is connected to the base (2420) and is adjustable relative to the base (2420) between a first position and a second position; The seat (2410) has an operating port at its lower part to allow operation of the second positioning member (2520) from outside the seat (2410). When the seat (2410) is in the first position, the operating port is blocked by the base (2420); When the seat (2410) is in the second position, the operating port is exposed outside the base (2420).

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