Child safety seat

Abstract

The present disclosure relates to a child safety seat, comprising: a seat body which comprises a sitting portion and a backrest portion connected to the sitting portion; and a tether assembly connected to the seat body and configured to connect the seat body to an anchor point of a vehicle. When the child safety seat is in a forward-facing usage state, two sides of the tether assembly in a left-right direction of the child safety seat are respectively connected to the backrest portion and the anchor point of the vehicle; and when the child safety seat is in a rear-facing usage state, the sitting portion is located on a rear side of the backrest portion, and only one side of the tether assembly in the left-right direction of the child safety seat is connected to an upper portion of the backrest portion and the anchor point of the vehicle.

Description

[0001] This disclosure relates to the field of child safety seat technology, specifically to a child safety seat. Background Art: Child safety seats provide a comfortable and safe sitting / lying space for children during travel. Generally, child safety seats can be used in both forward-facing and rear-facing configurations to accommodate children of different sizes, maximizing their safety. To prevent rollover in the event of an accidental impact, child safety seats typically include a top tether. However, in existing rear-facing child safety seats, the two webbing straps of the top tether are located on the left and right sides of the seat, hindering children from getting in and out and causing inconvenience. Furthermore, a reinforcing structure is often incorporated between the child safety seat and the top tether (also known as the "top harness") to enhance the connection's strength. Existing reinforcing structures are often complex and inconvenient to use. The present invention discloses a child safety seat, comprising: a seat body including a seat portion and a backrest portion connected to the seat portion; and a strap assembly connected to the seat body for connecting the seat body to an anchor point of a vehicle. When the child safety seat is in a rear-facing position, the seat portion is located behind the backrest portion, and the strap assembly connects only one side of the child safety seat in the left-right direction to the upper part of the backrest portion and the anchor point of the vehicle. According to one embodiment, the strap assembly extends rearward from the backrest portion only on one side of the child safety seat in the left-right direction. According to one embodiment, when the child safety seat is in a rear-facing position, the entire strap assembly is located on one side of the child safety seat in the left-right direction and extends rearward from the backrest portion. According to one embodiment, the strap assembly includes an anchor portion and a strap body passing through the anchor portion, the anchor portion being located between the two ends of the strap body for connecting to the anchor point of the vehicle, and when the child safety seat is in a rear-facing position, both ends of the strap body are connected to the same side of the backrest portion in the left-right direction. According to one embodiment, the backrest includes a connecting portion, and the two ends of the strap body are respectively fitted onto the connecting portion. A positioning groove is formed on one side of the connecting portion in the left-right direction. The positioning groove is recessed towards the center of the connecting portion in the left-right direction. When the child safety seat is in a rear-facing position, the two ends of the strap body are located on the side of the positioning groove away from the center of the connecting portion in the left-right direction. According to another embodiment, another positioning groove is formed on the other side of the connecting portion in the left-right direction. This other positioning groove is recessed towards the center of the connecting portion in the left-right direction. When the child safety seat is in a forward-facing position, the seat is located in front of the backrest, and the two ends of the strap body are located on the side of the two positioning grooves away from the center of the connecting portion in the left-right direction. The strap body is located on the left and right sides of the child safety seat, and the two ends of the strap body extend rearward from the connecting portion to the anchoring portion.According to one embodiment, when the child safety seat is in a rear-facing position, a portion of the strap assembly is located on one side of the child safety seat in the left-right direction and extends rearward from the backrest. Another portion of the strap assembly is located on the other side of the child safety seat in the left-right direction and extends rearward from the seat. According to another embodiment, the strap assembly includes an anchoring portion and a strap body passing through the anchoring portion. Both ends of the strap body are connected to the left and right sides of the seat, respectively. The anchoring portion is located between the two ends of the strap body and is used to connect to an anchor point on the vehicle. The strap body includes a first segment and a second segment located on both sides of the anchoring portion. When the child safety seat is in a rear-facing position, the first segment is located on the left-right side of the child safety seat and extends forward from the seat to the backrest, then extends rearward from the backrest to the anchoring portion. The second segment is located on the other side of the child safety seat in the left-right direction and extends rearward from the seat to the anchoring portion. According to one embodiment, the backrest is provided with a main body and a first connector connected to the main body. When the child safety seat is in a rear-facing use state, the first connector is located at the front of the backrest. A first section extends forward from the seat to the front of the first connector, then extends backward from the front of the first connector to the space between the first connector and the main body, and then extends backward from the space between the first connector and the main body to the anchoring part. According to one embodiment, the backrest portion is further provided with a second connector connected to the main body portion. The second connector and the first segment are located on the same side of the child safety seat in the left-right direction. When the child safety seat is in the rear-facing use position, the first segment extends forward from the seat portion to between the second connector and the main body portion, then extends forward from between the second connector and the main body portion to the front side of the first connector, then extends backward from the front side of the first connector to between the first connector and the main body portion, then extends backward from between the first connector and the main body portion to between the first connector and the main body portion, and then extends backward from between the second connector and the main body portion to the anchoring portion. According to the embodiment, the backrest is further provided with a second connector connected to the body part and a third connector connected to the main body part. The first connector and the first segment are located on the same side of the child safety seat in the left-right direction. The third connector and the first segment are located on the same side of the child safety seat in the left-right direction. When the child safety seat is in the forward-facing use state, the seat part is located in front of the backrest. The first segment extends backward from the seat part on one side of the child safety seat in the left-right direction to between the second connector and the body part, and then extends backward from between the second connector and the main body part to the anchoring part. The second segment extends backward from the seat part on the other side of the child safety seat in the left-right direction to between the third connector and the main body part, and then extends backward from between the third connector and the main body part to the anchoring part.According to one embodiment, the strap assembly includes an anchor portion and a strap body passing through the anchor portion. The anchor portion is located between two ends of the strap body or at one end of the strap body for connection to an anchor point of the vehicle. An upper fixing portion is provided on the upper part of the backrest, and at least one end of the strap body is connected to the upper fixing portion. According to one embodiment, when the child safety seat is in the rear-facing use position, the end of the strap body connected to the seat body is connected to the upper fixing portion located on only one side in the left-right direction of the child safety seat. According to one embodiment, the upper fixing portion includes two portions, respectively located on the left and right sides of the backrest. When the child safety seat is in the forward-facing use position, both ends of the strap body are connected to the two upper fixing portions respectively. When the child safety seat is in the rear-facing use position, one end of the strap body is connected to the upper fixing portion located on one side in the left-right direction of the child safety seat. According to one embodiment, the seat portion has a lower fixing portion, and one end of the strap body can be connected to the lower fixing portion. According to one embodiment, the fixing part includes two parts, located on the left and right sides of the seat, respectively. When the child safety seat is in the rear-facing use position, the two ends of the strap body are respectively connected to the upper fixing part and the lower fixing part located on different sides of the child safety seat in the left-right direction. According to one embodiment, the child safety seat has the upper fixing part and the lower fixing part, as well as a sliding mechanism connecting the two, on the same side in the left-right direction. The sliding mechanism is configured such that one end of the strap body can slide from one of the upper fixing part and the lower fixing part to the other and be positioned by means of the sliding mechanism. According to one embodiment, the sliding mechanism is a groove or rail provided on the outer surface of the child safety seat. According to one embodiment, at least one of the upper fixing part and the lower fixing part has a reinforcing member to increase its strength, and the reinforcing member is fixed to the child safety seat.This disclosure also provides a child safety seat, comprising: a seat body having a backrest portion, the backrest portion having a perforation in its housing; a strap assembly having a strap body, an anchoring portion, and a connector, wherein the strap body has a flat cross-section and passes through the perforation in the housing, a first end of the strap body is located on the outer side of the housing, and a second end of the strap body is located on the inner side of the housing; the anchoring portion is connected to the first end and adapted to connect to an anchor point of a vehicle; the connector is connected to the first end; and at least one reinforcing portion disposed between the housing and the connector for reinforcing the strength of the connection between the strap body and the seat body, wherein when the anchoring portion moves between a front mounting position and a rear mounting position of the seat body, the connector can rotate relative to the reinforcing portion to prevent the strap body from folding. According to an embodiment, at least one reinforcing part includes a first reinforcing part, which has an abutment portion for fixed connection to the seat body and a guide portion protruding from the abutment portion; wherein the guide portion has a guide hole extending from the abutment portion to a through hole, and the strap body passes through the guide hole. According to one embodiment, the cross-section of the guide hole is elongated and extends along the length direction of the backrest. According to one embodiment, each of the guide portions is located on the left and right sides of the backrest, such that the opening directions of each of the guide holes are opposite. According to one embodiment, the guide hole has a widened portion in the middle, such that the width of the middle portion of the guide hole is greater than the width of the end portion. According to one embodiment, the backrest has a shoulder strap and a crossbar, the crossbar being disposed inside the housing of the backrest and extending along the width direction of the seat body, the shoulder strap being wrapped around the crossbar, and at least one reinforcing part further includes a second reinforcing part, the second reinforcing part being fixed to the crossbar, the second reinforcing part having an opening, and a second end portion passing through the opening and connected to a connector. According to one embodiment, the connector is configured as a flat buckle, which abuts against the reinforcing part in parallel.This disclosure further provides a child safety seat, comprising: a seat body having a backrest portion, the backrest portion having a perforation in its housing, wherein the backrest portion also has a shoulder strap and a crossbar, the crossbar being disposed inside the housing of the backrest portion and extending along the width direction of the seat body, the shoulder strap being wrapped around the crossbar; a strap assembly having a strap body, an anchoring portion, and a connector, wherein the strap body has a flat cross-section and passes through the perforation in the housing, a first end of the strap body being located on the outer side of the housing, and a second end of the strap body being located on the inner side of the housing; the anchoring portion being connected to the first end and adapted to connect to an anchoring point of the vehicle; the connector being connected to the second end; and at least one reinforcing portion disposed between the housing and the connector for reinforcing the strength of the connection between the strap body and the seat body, wherein the reinforcing portion has a guide hole, the strap body passing through the guide hole, the guide hole having an elongated cross-section extending along the length direction of the seat body. The guide hole has a widened portion in the middle, such that the width of the middle portion of the guide hole is greater than the width of the end portion. When the anchoring portion moves between the front mounting position and the rear mounting position of the seat body, the connector can rotate relative to the reinforcement portion to prevent the strap body from folding. According to one embodiment, at least one end of the reinforcement portion is fixed to a crossbar, and the other end is provided with an opening. A second end passes through the opening and connects to the connector. According to one embodiment, the backrest portion includes a main body and a pair of side wings respectively connected to the main body. There are two perforations, each located in one of the pair of side wings, such that the orientation of each perforation is opposite.Figure 1 shows a perspective view of a child safety seat installed on a vehicle seat in a forward-facing use state according to one embodiment; Figure 2 shows a perspective view of a child safety seat in a forward-facing use state according to one embodiment; Figure 3 shows a perspective view of a child safety seat installed on a vehicle seat in a rearward-facing use state according to one embodiment; Figure 4 shows a perspective view of a child safety seat in a rearward-facing use state according to one embodiment; Figure 5 shows a perspective view of a child safety seat in a rearward-facing use state according to one embodiment with a portion of the seat body hidden; Figure 6 shows a schematic diagram of a partial backrest according to another embodiment; Figure 7 shows a schematic diagram of a partial backrest in another state according to another embodiment; Figure 8 shows an exploded schematic diagram of an adjusting member and a portion of the first section according to one embodiment; Figure 9 shows a schematic diagram of an adjusting member and a portion of the second section according to one embodiment; Figure 10 shows a perspective view of a child safety seat installed on a vehicle seat in a forward-facing use state according to another embodiment; Figure 11 shows a perspective view of a child safety seat installed on a vehicle seat in a forward-facing use state according to another embodiment from another perspective; Figure 12 shows a perspective view of a child safety seat installed on a vehicle seat in a rearward-facing use state according to another embodiment. Figure 13 shows a perspective view of a child safety seat installed in a rear-facing position on a vehicle seat according to another embodiment; Figure 14 shows a perspective view of a child safety seat in a rear-facing position with the harness assembly hidden according to another embodiment; Figure 15 shows a cross-sectional view of a child safety seat according to another embodiment; Figure 16 shows a perspective view of a child safety seat according to yet another embodiment; Figure 17 shows a perspective view and a partial enlargement of a child safety seat in a forward-facing position according to yet another embodiment; Figure 18 shows a perspective view of a child safety seat in a forward-facing position according to yet another embodiment from another angle; Figures 19A and 19B show perspective views of one embodiment of a child safety seat in a rear-facing position from two different angles; Figure 20 shows a perspective view of another embodiment of a child safety seat in a rear-facing position according to yet another embodiment; Figure 21 shows a perspective view of yet another embodiment of a child safety seat in a rear-facing position according to yet another embodiment.Figure 22 shows a front perspective view of a child safety seat according to a first embodiment; Figure 23 shows a rear perspective view of a child safety seat according to a first embodiment; Figure 24 shows a rear front view of a child safety seat according to a first embodiment; Figures 25A and 25B show cross-sectional views of a child safety seat according to Figure 1; Figure 26 shows a partial detail view of Figure 25A; Figure 27 shows a perspective view of a reinforcement according to a first embodiment; Figure 28 shows another perspective view of a reinforcement according to a first embodiment; Figure 29 shows a front perspective view of a child safety seat according to a second embodiment; Figure 30 shows a front perspective view of a child safety seat according to a second embodiment; Figure 31 shows a perspective view of a harness assembly according to a first embodiment; Figure 32 shows a cross-sectional view of a child safety seat according to Figure 30; Figure 33 shows a partial detail view of Figure 32; Figure 34 shows a front perspective view of a child safety seat according to a third embodiment; Figure 35 shows a cross-sectional view of a child safety seat according to Figure 34; Figure 36 shows a partial detail view of Figure 35. (See attached list of icons.)

[0002] 100 child safety seats

[0003] 1000 Seat Body

[0004] 1100 Sitting Section

[0005] 1200 backrest

[0006] 1210 Main Body

[0007] 1220 Connecting part

[0008] 122 Connecting rod

[0009] 1221a positioning component, 1221b positioning post

[0010] 1221b-l rod section, 1221b-2 head section

[0011] 1222 positioning slot

[0012] 1223 Restraint Belt

[0013] 1224 connecting belt

[0014] 1225 Buckle 1226 Storage Bag

[0015] 1227 First Connector

[0016] 1228 First. Connector

[0017] 1229 Third Connector

[0018] 1230 Flanking

[0019] 1240 Reinforced Department

[0020] 1250 Fixed Part

[0021] Hollow sections of 1260a and 1260b

[0022] 1270 Upper Fixing Part

[0023] 1280 Lower Fixing Part

[0024] 1300 headrest

[0025] 1400 sliding mechanism

[0026] 1,500 reinforcement parts

[0027] 2000 lacing assembly

[0028] 2100 lacing body

[0029] 2110 Part 1

[0030] 2111 First end, collar

[0031] 2112 Joints, seams

[0032] 2120 Part Two

[0033] 2121 First end, collar

[0034] 2122 Joints, seams

[0035] 2200 Anchorage

[0036] 2300 Adjustment Part

[0037] 2310 connecting shaft

[0038] 2400 from mid-range

[0039] 2500 First Lace-up

[0040] 2510 Joints, Seams

[0041] 2520 rings

[0042] 2600 Second Lace

[0043] 2700 limit component

[0044] 3000 base

[0045] 200 vehicle seats

[0046] 210 Passenger Section

[0047] 220 backrest

[0048] I centerline F front

[0049] B after

[0050] L left

[0051] 5

[0052] T on

[0053] DT

[0054] Hl child safety seat

[0055] H100 Seat Body

[0056] H110 Seating

[0057] H120 backrest

[0058] H121 Main Body

[0059] H122 Joint

[0060] H123 perforation

[0061] H124 mounting hole

[0062] H125 protrusion

[0063] H126 flank

[0064] H140 Headrest

[0065] H150 Reinforced Section

[0066] H151 guide hole

[0067] H152 Guiding Section

[0068] H153 Abutment Section

[0069] H154 Fixing Part

[0070] H155 Ribs

[0071] H156 Protrusion

[0072] H157 connection hole

[0073] H158 widening section

[0074] H160 crossbar, shoulder strap tube

[0075] H161 Fixing part

[0076] H162 shoulder strap

[0077] H170 Reinforced Section

[0078] H171 Fixing part

[0079] H172 opening

[0080] H200 Lace-up Assembly

[0081] H210 tie body

[0082] H211 Part 1 H212 Part 2

[0083] H213 first end

[0084] H214 First End

[0085] H220 anchorage

[0086] H230 Adjustment Part

[0087] H231 indicator, indicator window

[0088] H240 connector, flat buckle

[0089] H241 Opening

[0090] H300 base Detailed Description Although this invention is illustrated and described with reference to specific embodiments, the invention should not be limited to the details shown. Specifically, various modifications can be made to these details within the scope of equivalents of the claims and without departing from the invention. The directional descriptions such as "front F," "rear B," "left L," "right R," "up T," and "down D" used herein are for ease of understanding only and are not limited to these directions, but can be adjusted according to actual circumstances. Although this application has been described with reference to exemplary embodiments, the terminology used is descriptive and exemplary, not restrictive. Figure 1 shows a perspective view of a child safety seat 100 mounted forward on a vehicle seat 200 according to an embodiment. The vehicle seat 200 includes a seating portion 210 and a backrest 22 located above the seating portion 210. The seating portion 210 is located in front of the backrest 220 in the fore-aft direction (the front, rear, left, and right of the vehicle, vehicle seat 200, and child safety seat 100 are defined with reference to the vehicle's forward direction). The seating portion 210 is used to support the child safety seat 100 upwards, and the backrest 220 is used to abut the child safety seat 100 forwards. As shown in Figures 1 and 3, the child safety seat 100 includes a seat body 1000 for a child to sit on, a harness assembly 2000 connecting the seat body 1000 to the vehicle, and a base 3000 located on the seat body 1000. The base 3000 is placed on the seating portion 210 and can be detachably connected to the vehicle seat 200 by a fixing device (e.g., ISOFIX) not shown. After the base 3000 is connected to the vehicle seat 200, the base 3000 is fixed relative to the vehicle seat 200, but the seat body 1000 can rotate relative to the base 3000, so that the child safety seat 100 can be in a forward-facing or rear-facing position. When the child safety seat 100 is installed on the vehicle seat 200 and is in a forward-facing position, the child can face the front of the vehicle after sitting in the seat body 1000. When the child safety seat 100 is installed on the vehicle seat 200 and is in a rear-facing position, the seat body 1000 rotates horizontally by 180 degrees relative to the forward-facing position, so that the child can face the rear of the vehicle after sitting in the seat body 1000, specifically facing the backrest 220 of the vehicle seat 200, as shown in Figure 3.As shown in Figures 1 and 2, the seat body 1000 includes a seat portion 1100 that contacts the lower half of the child's body, a backrest portion 1200 that contacts the upper half of the child's body, and a headrest portion 1300 that contacts the child's head. Whether in a forward-facing or rear-facing use position, the backrest portion 1200 and the headrest portion 1300 are located above the seat portion 1100, and the headrest portion 1300 and the seat portion 1100 are located on the same side of the backrest portion 1200 in the front-rear direction. In the forward-facing use position, the seat portion 1100 is in the front, while the backrest portion 1200 is in the rear, meaning the backrest portion 1200 is closer to the backrest 220 of the vehicle seat 200 than the seat portion 1100. As shown in Figure 3, in this rearward use state, the seat 1100 is located at the rear, while the backrest 1200 is located at the front. That is, the seat 1100 is closer to the backrest 220 of the vehicle seat 200 than the backrest 1200. According to this disclosure, the strap assembly 2000 is used to connect the seat body 1000 to an anchor point (not shown) of the vehicle, regardless of whether it is in the forward or rearward use state. The anchor point is generally located at the rear of the backrest 220 of the vehicle seat 200. By connecting the seat body 1000 rearward to the vehicle anchor point through the strap assembly 2000, the seat body 1000 is prevented from tipping forward during vehicle braking or a collision, thus avoiding danger to children riding in the seat body 1000. As shown in Figures 1 and 2, the backrest 1200 includes a main body 1210 and connecting portions 1220 on the left and right sides of the main body 1210. The main body 1210 is used to abut against the child's back and laterally protect the child's upper body in the left and right directions to avoid impacts from the left and right directions. The main body 1210 also includes two side wings 1230 on the left and right sides of the main body 1210, which laterally protect the child's upper body in the left and right directions to avoid impacts from the left and right directions. According to this embodiment, the connecting portion 1220 extends in the left and right direction, and its two ends are respectively connected to the main body 1210, while the remaining part is vertically spaced from the main body 1210, thereby forming a hollow portion 1260a between the connecting portion 1220 and the main body 1210. The connecting portion 1220 is used to connect to the harness assembly 2000 and can also be used as a handle for carrying the child safety seat 100. In another embodiment, the connecting portion 1220 may also be provided on the side of the main body portion 1210 away from the seat portion 1100 in the front-back direction, instead of being provided on the upper side of the main body portion 1210, and the hollow portion 1260a formed between the connecting portion 1220 and the main body portion 1210 is located on the side of the main body portion 1210 away from the seat portion 1100 in the front-back direction.In another embodiment, the connecting portion 1220 may also be continuously connected to the main body portion 1210 in the left-right direction, rather than only its left and right ends being connected to the main body portion 1210. The connecting portion 1220 itself forms the aforementioned hollow portion 1260a for connection to the strap assembly 2000. As shown in Figures 1 and 2, the seat portion 1100 is used to abut against the child's buttocks upwards and to laterally protect the child's lower body in the left-right direction to avoid impacts from the left and right sides. The seat portion 1100 also includes two side wings 1230 located on the left and right sides of the seat portion 1100, which laterally protect the child's lower body in the left-right direction to avoid impacts from the left and right sides. As shown in Figures 1 and 2, the lacing assembly 2000 includes a lacing body 2100 and an anchoring portion 2200. The lacing body 2100 connects the seat body 1000 and the anchoring portion 2200, which is used to connect to the vehicle's anchoring point. Both ends of the lacing body 2100 are connected to the seat body 1000, and the anchoring portion 2200 is located between the two ends of the lacing body 2100 and can slide along the lacing body 2100. According to this embodiment, one end of the anchoring portion 2200 is, for example, an R-hook or K-hook for hooking onto the vehicle's anchoring point, and the other end has a through hole through which the lacing body 2100 can pass to connect with the anchoring portion 2200. The anchoring portion 2200 serves as the boundary, defining the first segment 2110 and the second segment 2120 of the tie body 2100, i.e., the first segment 2110 and the second segment 2120 are located on both sides of the anchoring portion 2200. The lengths of the first segment 2110 and the second segment 2120 can be adjusted by moving the anchoring portion 2200. According to this disclosure, the tie assembly 2000 can be formed, for example, from a single piece of fabric or composed of multiple pieces of fabric. As shown in FIG2, on the side away from the anchoring portion 2200, the first segment 2110 has a first end 2111 (i.e., the first end of the tie body 2100), and the first segment 2120 has a first end 2121 (i.e., the other end of the tie body 2100). The first end portion 2111 and the first end portion 2121 are respectively connected to the backing portion 1200, specifically to the connecting portion 1220 of the backing portion 1200. Preferably, the first end portion 2111 and the first end portion 2121 are constructed as collars 2111 and 2121, which are sleeved on the connecting portion 1220. Specifically, the first end portion 2111 and the second end portion 2121 bypass the connecting portion 1220 and are joined together by the joining portion 2112 to form collars 2111 and 2121. The joining portion 2112 is, for example, a stitch.As can be seen from the above, the first end 2111 and the second end 2121 are partially disposed in the hollow portion 1260°. The collars 2111 and 2121 formed by the first end 2111 and the second end 2121 are not tightly fitted to the connecting portion 1220, but rather leave a gap. This gap is sufficient to allow the first end 2111 and the second end 2121 to slide along the connecting portion 1220 when the strap body 2100 is in a relaxed state. As shown in Figures 2, 3, 8, and 9, the strap assembly 2000 also includes an adjustment member 2300 for the strap body 2100 to pass through. The adjustment member 2300 is used to adjust the overall length of the first section 2110 and the second section 2120. Specifically, taking the adjusting member 2300 as the boundary, the strap body 2100 can be further divided into a first strap 2500 and a second strap 2600. The first strap 2500 is a portion of the first section 2120, and the second strap 2600 includes a portion of the first section 2120 and the entire first section 2110. One end of the first strap 2500 (i.e., the second end 2121) is connected to the connecting part 1220, and the other end of the first strap 2500 is connected to the adjusting member 2300. The other end of the second strap 2600 (i.e., the second end 2111) is connected to the connecting part 1220, and the other end of the first strap 2600 is wrapped around the adjusting member 2300 to form a free end 2400. By pulling the free end 2400, the extension length of the strap body 2100 between the first end 2111 and the first end 2121 can be adjusted. That is, the overall length of the first segment 2110 and the second segment 2120. In this embodiment, it can be seen that the adjusting member 2300 is located on the second segment 2120. In other embodiments, the adjusting member 2300 can also be located on the first segment 2110. In other embodiments, the adjusting member 2300 may not be provided. As shown in Figures 8 and 9, the adjusting member 2300 has two connecting shafts 2310, which are located on both sides of the adjusting member 2300 and connected to the other end of the first strap 2500 and the other end of the second strap 2600, respectively.The first strap 2500 has one end that wraps around one of the connecting shafts 2310 and then joins with a joint 2510 to form a collar 2520. This joint 2510 is, for example, a stitch. One end of the first strap 2500 is the second end 2121. Thus, the two ends of the first strap 2500 form collars 2121 and 2520 respectively. The other end of the second strap 2600 wraps around another connecting shaft 2310 and extends out as an adjusting member 2300 to form the free end 2400. One end of the first strap 2600 is the first end 2111, forming a collar 2111. As shown in Figure 1, in the forward-facing use state, the first end 2111 and the second end 2121 are located on the left and right sides of the connecting part 1220 near its left and right ends (the left and right sides of the connecting part 1220 are divided by the center line I in the left-right direction). It is also located on the left and right sides of the backrest 1200 and the left and right sides of the child safety seat 100 (the left and right sides of the backrest 1200 are divided by the center line I of the backrest 1200 in the left and right directions, and the left and right sides of the child safety seat 100 are divided by the center line T of the fabric in the left direction. In this embodiment, the center line I of the connecting part 1220 in the left and right directions coincides with the center line I of the backrest 1200 in the left and right directions and the center line I of the child safety seat 100 in the left and right directions). As shown in Figure 2, in order to ensure that the first end 2111 and the first end 2121 can be stably positioned on the left and right sides of the connecting part 1220 (or the left and right sides of the child safety seat 100) in the forward-facing use state, so as to provide a more stable connection between the child safety seat 100 and the vehicle's anchor point, the connecting part 1220 is provided with two positioning grooves 1222. The two positioning grooves 1222 are specifically provided on the left and right sides of the connecting part 1220, and both positioning grooves 1222 are recessed towards the center of the connecting part 1220 in the left and right directions, so as to receive the first end 2111 of the first segment 2110 and the second end 2121 of the second segment 2120 of the strap assembly 2000 in the left and right directions, thereby preventing the first end 2111 and the second end 2121 from sliding towards the center of the connecting part 1220 in the left and right directions, respectively.As shown in Figures 1 and 2, when the child safety seat 100 is in forward-facing use, the two ends of the strap body 2100 (i.e., the first end 2111 and the second end 2121) are respectively located on the side of the two positioning grooves 1222 away from the middle of the connecting part 1220 in the left-right direction. At this time, the first segment 2110 and the second segment 2120 are also located on the left and right sides of the child safety seat 100, respectively. The two ends of the strap body 2100 extend backward from the backrest 1200 to the anchoring part 2200 connected to the vehicle's anchoring point. As shown in Figures 3 and 4, when the child safety seat 100 is in rear-facing use, the strap assembly 2000 extends backward from the backrest 1200 to the vehicle's anchoring point only on one side of the child safety seat 100 in the left-right direction (as shown by the left side L in Figures 3 and 4). Specifically, the entire strap assembly 2000 is located on one side of the child safety seat 100 in the left-right direction. The strap body 2100 extends rearward from the connecting portion 1220 of the backrest 1200 to the vehicle's anchoring point. Both ends of the strap body 2100 are connected to the backrest 1200 on the same side in the left-right direction. Specifically, both ends of the strap body 2100 are located on the same side of the positioning groove 1222 away from the middle of the connecting portion 1220 in the left-right direction. That is, the first section 2110 and the first section 2120 are located on the same side of the child safety seat 100 in the left-right direction. When the child safety seat 100 is installed on the vehicle seat 200, the strap assembly 2000 is positioned away from the vehicle door in the left-right direction, while the side of the child safety seat 100 without the strap assembly 2000 in the left-right direction is adjacent to the vehicle door, making it convenient for the child's caregiver to put the child into or take the child safety seat 100 out from that side. According to the disclosure, whether in the forward or backward use state, the first end 2111 and the second end 2121 are both located on the side of the positioning groove 1222 away from the middle of the connecting part 1220. At this time, the first end 2111 and the second end 2121 can be accommodated in the positioning groove 1222 or can be spaced apart from the positioning groove 1222 in the left and right direction.When the anchoring part 2200 is connected to the vehicle's anchoring point, the strap body 2100 is tightened. As the first end 2111 and the second end 2121 move laterally towards the center of the connecting part 1220, the bottom of the positioning groove 1222 blocks both the first end 2111 and the second end 2121. This confines the first end 2111 and the second end 2121 to the side of the corresponding positioning groove 1222 away from the center of the connecting part 1220, preventing them from sliding out of the corresponding positioning groove 1222 towards the center of the connecting part 1220 in both forward and rearward use states. In this embodiment, to switch the child seat 100 from a forward-facing to a rearward-facing state, the connection between the anchoring part 2200 and the vehicle's anchoring point must be disconnected first. At this time, the strap body 2100 is in a relaxed state. Then, the first end 2111 of the first segment 2110 or the second end 2121 of the second segment 2120, which is near the vehicle door, slides from the corresponding positioning groove 1222 away from the middle of the connecting portion 1220 to the middle of the connecting portion 1220, and then slides to another positioning groove 1222 away from the middle of the connecting portion 1220, so that the first end 2111 and the first end 2121 are located on the same positioning groove 1222 away from the middle of the connecting portion 1220, and the entire strap assembly 2000 is located on the same side of the child seat 100 in the left-right direction. Since the connecting portion 1220 is farther from the anchor point of the vehicle seat 200 in the rear-facing use state, the overall extension length of the second segment 2110 and the first segment 2120 can be extended by the adjusting member 2300. As shown in Figures 3 and 4, compared with the forward use state in Figures 1 and 2, the first end 2111 of the first segment 2110 is moved from the side of the positioning groove 1222 on the left-right side of the connecting part 1220 away from the middle of the connecting part 1220 to the side of the positioning groove 1222 on the other side of the left-right direction away from the middle of the connecting part 1220, so that it is located in the same positioning groove 1222 away from the middle of the connecting part 1220 as the second end 2121 of the second segment 2120.As shown in Figure 2, the connecting part 1220 includes a connecting rod 122 extending in the left-right direction and a positioning member 1221a located below the connecting rod 122. The left and right ends of the connecting rod 122 are connected to the main body 1210, while the remaining portion is spaced downwards from the main body 1210. The positioning member 1221a is shorter than the connecting rod 122 in the left-right direction. The middle portion of the positioning member 1221a is connected upwards to the connecting rod 122, while the left and right ends of the positioning member 1221a are spaced apart from the connecting rod 122 in the up-down direction. The positioning member 1221a is spaced apart from the main body 1210 in the down-right direction. Two positioning grooves 1222 are located between the connecting rod 122 and the left and right ends of the positioning member 1221a in the up-down direction. In this embodiment, the center lines L of the positioning member 1221a, the connecting rod 122, and the connecting part 1220 in the left-right direction coincide. In other embodiments, the positioning member 1221a can also be integrally formed with the connecting portion 1220, i.e., a single piece. Figure 5 shows a perspective view of the child safety seat 100 installed rearward according to the embodiment. Unlike Figure 4, the rear cover of the seat body 1000 is removed in Figure 5, allowing a view of the interior. According to this embodiment, the child safety seat 100 includes a reinforcing portion 1240 located at the rear of the seat body 1000. The reinforcing portion 1240 is, for example, two reinforcing tubes, and the connecting portion 1220 is configured as a U-shaped connecting tube, connecting to the upper ends of the two reinforcing portions 1240. The reinforcing portion 1240 extends along the backrest portion 1200 to below the seat portion 1100, providing overall reinforcement to prevent deformation of the child safety seat 100. Advantageously, the connecting portion 1220 can also be integrally formed with the reinforcing portion 1240, thereby providing better stability. Furthermore, the reinforcing part 1240 may be provided as one or more, or in other forms, and this disclosure is not limited thereto. Figure 5 also shows the anchoring part 2200, which includes an elastic tongue that closes the hook, thereby preventing the anchoring part 2200 from detaching from the anchoring point on the rear side of the vehicle seat 200. Figure 6 shows a schematic diagram of the connecting part 1220 according to another embodiment.According to this embodiment, the single positioning member 1221a in Figures 1 to 5 is replaced with two positioning members 1221b respectively disposed on the left and right sides of the connecting rod 122. The two positioning members 1221b protrude downward from the connecting rod 122 toward the main body 1210. The positioning member 1221b includes a rod portion 1221b-l connected upward to the connecting rod 122 and a head portion 1221b-2 spaced apart from the connecting rod 122 in the vertical direction. The rod portion 1221b-l and the head portion 1221b-2 are connected to each other. The size of the head portion 1221b-2 in the horizontal direction is larger than the size of the rod portion 1221b-l in the horizontal direction. The positioning groove 1222 is formed in the vertical direction on the side of the connecting rod 122 and the head portion 1221b-2 away from the middle of the connecting rod 122. Specifically, the positioning element 1221b is, for example, a screw, so its shank 1221b-1 is cylindrical, and its head 122lb-2 is flat and circular. The diameter of the head 1221b-2 is larger than the diameter of the shank 1221b-1, and the centerline of the shank 1221b-1 coincides with the centerline of the head 1221b-2. The shank 1221b-1 is screwed upward into the connecting rod 122 and fixed, so that the flat head 1221b-2 is spaced upward from the connecting rod 122, forming a positioning groove 1222 between the flat head 1221b-2 and the connecting rod 122. The positioning groove 1222 is specifically located between the connecting rod 122 and the flat head 1221b-2 on the side away from the middle of the connecting rod 122. In other embodiments, the two positioning elements 1221b may also be integrally formed with the connecting rod 122. As shown in Figure 6, the backrest portion 1200 is also provided with a restraint strap 1223 located on the outside of the main body portion 1210. The restraint strap 1223 is connected to the main body portion 1210 at both ends in the left-right direction, and the restraint strap 1223 is located on the side of the connecting portion 1220 away from the seat portion 1100 in the front-back direction. It is lower than the top of the connecting portion 1220. In this embodiment, the restraint strap 1223 is tautly provided on the outside of the connecting portion 1220.As shown in Figure 6, the backrest portion 1200 is also provided with a connecting strap 1224 on the outside of the main body portion 1210. The connecting strap 1224 is located on the side of the connecting portion 1220 in the front-back direction near the seat portion 1100 and below the top of the connecting portion 1220. One end of the connecting strap 1224 is connected to the main body portion 1210, and the other end of the connecting strap 1224 is provided with a storage bag 1226. The storage bag 1226 is used to store the strap assembly 2000 when it is not in use. As shown in Figure 7, the connecting strap 1224 is connected to the restraint strap 1223 to surround the connecting portion 1220 in the front-back direction. Specifically, the connecting strap 1224 can extend to the top of the connecting portion 1220 and then extend to the side of the restraint strap 1223 near the connecting portion 1220, so that the connecting strap 1224 and the restraint strap 1223 partially overlap and are connected to each other in the front-back direction. The storage bag 1226 is positioned below the restraint strap 1223, and its opening is exposed to accommodate the strap assembly 2000, effectively preventing the storage bag 1226 from moving. Although the connecting strap 1224 and the restraint strap 1223 surround the connecting portion 1220 in the front-to-back direction, they do not cover the part where the connecting portion 1220 connects to the strap body 2100. The portion of the connecting strap 1224 surrounding the connecting portion 1220 is approximately located between the two positioning members 1221b. In the forward or backward use state, this further prevents both ends of the strap body 2100 from moving toward the middle of the connecting portion 1220. When switching from the forward to the backward use state or vice versa, the connecting strap 1224 and the restraint strap 1223 need to be separated to allow one end of the strap body 2100 to slide along the connecting portion 1220. In this embodiment, the connecting strap 1224 and the restraint strap 1223 are connected by a buckle 1225. The buckle 1225 includes a male buckle and a female buckle that can be fastened to each other. One of the male buckle and the female buckle is provided in one of the connecting strap 1224 and the restraint strap 1223, and the other of the male buckle and the female buckle is provided in the other of the connecting strap 1224 and the restraint strap 1223. In other embodiments, the buckle 1225 may also be replaced by Velcro or a zipper composed of hook and loop surfaces, etc., without limitation. In this embodiment, after the connecting strap 1224 and the restraint strap 1223 are connected, the storage bag 1226 is provided near one end of the connecting portion 1220 in the left-right direction, so that when both ends of the strap body 2100 move to the same side in the left-right direction of the connecting portion 1220, they are stored in the storage bag 1226. Figures 10 to 15 show a child safety seat 100 according to another embodiment.For simplicity, only the differences from the embodiments shown in Figures 1 to 5 will be described. As shown in Figures 10 and 11, the first end 2111 of the first segment 2110 and the second end 2121 of the first segment 2120 of the harness assembly 2000 (not shown in Figure 10) are respectively connected to the left and right sides of the seat portion 1100 of the seat body 1000 of the child safety seat 100, specifically connected to the two side wings 1230 on the left and right sides of the seat portion 1100. The first end 2111 and the first end 2121 are fixed to the two corresponding fixing portions 1250 on the two side wings 1230 of the seat portion 1100. The first end 2111 and the second end 2121 can pass through the fixing portions 1250 and be fixed to the inside of the child safety seat 100. The fixing portion 1250 is, for example, a perforation. The first end 2111 and the first end 2121 are used to install limiting members such as D-rings or bows. The size of the limiting member is larger than the size of the perforation. To prevent the first end 2111 and the second end 2121 from detaching from the fixing part 1250. As shown in FIG14, the backrest part 1200 includes a first connector 1227 located on the side of the main body part 1210 away from the seat part 110 in the front-rear direction, a second connector 1228 located on the left and right sides of the main body part 1210, and a third connector 1229 (specifically located on the outside of the two side wings 1230 on the left and right sides of the main body part 1210). Among them, the second connector 1228 and the first end 2111 are located on the same side of the child safety seat 100 in the left-right direction, and the third connector 1229 and the second end 2121 are located on the same side of the child safety seat 100 in the left-right direction. On the same side in the left-right direction, the first connector 1227, the second connector 1228, and the second connector 1229 have the same structure, only their positions are different.As shown in Figure 14, one end of the first connector 1227, the second connector 1228, and the third connector 1229 is fixedly connected to the main body 1210, and the other end of the first connector 1227, the second connector 1228, and the third connector 1229 is detachably connected to the main body 1210. The remaining parts of the first connector 1227, the first connector 1228, and the third connector 1229 are spaced apart from the main body 1210, and the first connector 1227, the second connector 1228, and the third connector 1229 and the main body 1210 form a hollow part 1260b. The strap body 2100 can enter the body 1210 from the detachably connected end of the first connector 1227, the first connector 1228, and the third connector 1229. The third connector 1229 and the main body 1210 enclose the hollow portion 1260b, allowing the strap body 2100 to connect to the backrest portion 1200. The shapes of the first connector 1227, the first connector 1228, and the third connector 1229 are adapted to the width of the strap body 2100 and prevent the strap body 2100 from detaching. As shown in FIG14, the other end (specifically the upper end) of the first connector 1227, the second connector 1228, and the third connector 1229 that can be detachably connected to the main body 1210 is bent toward the end (specifically the lower end) of the first connector 1227, the second connector 1228, and the third connector 1229 that is fixedly connected to the main body 1210, and is arranged in a hook shape. The first connector 1227, the second connector 1228, and the third connector 1229 are made of an elastic material. When no force is applied, the other ends of the first connector 1227, the second connector 1228, and the third connector 1229 are tightly attached to the main body 1210. When subjected to external force, the other ends of the first connector 1227, the second connector 1228, and the third connector 1229 will separate from the main body 1210, forming a channel for the strap body 2100 to enter the corresponding hollow part 1260b. After the strap body 2100 enters the corresponding hollow part 1260b, the other ends of the first connector 1227, the second connector 1228, and the third connector 1229 will continue to be tightly attached to the main body 1210, thereby preventing the strap body 2100 from detaching from the hollow part 1260b and thus from the connection with the backrest 1200.In other embodiments, the other ends of the first connector 1227, the second connector 1228, and the third connector 1229 may also be spaced apart from the main body 1210 to form a channel for the strap body 2100 to enter the corresponding hollow part 1260b. Regardless of whether the child safety seat 100 is in a forward-facing or rearward-facing use state, the extension direction of the strap body 2100 and the direction in which the strap body 2100 enters the channel can be staggered. For example, the upper ends of the first connector 1227, the second connector 1228, and the third connector 1229 shown in FIG. 14 are spaced apart from the main body 1210, rather than being tightly attached to the surface of the main body 1210 when no force is applied. As shown in Figures 10 and 11, when the child safety seat 100 is installed facing the front of the vehicle, the first segment 2110 and the first segment 2120 are located on the left and right sides of the child safety seat 100, respectively. The first segment 2110 enters the hollow portion 1260b formed by the second connector 1228 and the main body 1210, and the second segment 2120 enters the hollow portion 1260b formed by the third connector 1229 and the main body 1210, thereby preventing the first segment 2110 and the first segment 2120 from dislodging from the corresponding hollow portion 1260b. In this way, the first segment 2110 and the first segment 2120 extend from the seat portion 1100 to the backrest portion 1200, and then from the backrest portion 1200 to the vehicle's anchoring point. Through the first connector 1228 and the third connector 1229, after the anchoring portion 2200 of the harness assembly 2000 is connected to the anchoring point on the rear side of the backrest 220 of the vehicle seat 200, the first segment 2110 and the second segment 2120 can provide sufficient force to fix the backrest portion 1200 of the child safety seat 100 against the backrest 220 to prevent it from detaching from the backrest 220. In this embodiment, the two fixing portions 1250 connected to the first segment 2110 and the second segment 2120 are positioned relative to the child safety seat 100. The center line 1 (coinciding with the center line I of the backrest 1200) is symmetrically arranged. The second connector 1228 and the third connector 1229, which connect to the first section 2110 and the second section 2120, are also symmetrically arranged relative to the center line T of the child safety seat 100 (coinciding with the center line T of the backrest 1200). The first connector 1227 is arranged on the center line T of the backrest 1200.According to Figures 10 and 11, the first segment 2110 extends rearward from the seat portion 1100 on one side of the child safety seat 100 in the left-right direction to between the second connector 1228 and the main body portion 1210, and then extends rearward from between the second connector 1228 and the main body portion 1210 to the vehicle's anchoring point. The second segment 2120 extends rearward from the seat portion 1100 on the other side of the child safety seat 100 in the left-right direction to between the third connector 1229 and the main body portion 1210, and then extends rearward from between the third connector 1229 and the main body portion 1210 to the vehicle's anchoring point. According to Figures 12 and 13, when the child safety seat 100 is in the rear-facing position, the first segment 2110 of the strap assembly 2000 is located on one side of the child safety seat 100 in the left-right direction (left side L in Figure 12), and extends forward from the seat 1100 to the backrest 1200, and then extends backward from the backrest 1200 to the anchoring part 2200 connected to the anchoring point of the vehicle seat 200. The second segment 2120 of the strap assembly 2000 is located on the other side of the child safety seat 100 in the left-right direction (right side R in Figure 12), and extends backward from the seat 1100 to the anchoring part 2200 connected to the anchoring point of the vehicle. It can be seen that the strap assembly 200 only extends backward from the backrest 1200 to the anchoring point of the vehicle on one side of the child safety seat 100 in the left-right direction. As shown in Figures 12 and 13, specifically, in the rearward use state, the first connector 1227 is located on the front side of the main body 1210. The first end 2111 of the first segment 2110 extends forward from the corresponding fixing part 1250 to the space between the second connector 1228 and the main body 1210 (that is, the first segment 2110 passes through the hollow part 1260b formed by the first connector 1228 and the main body 1210), then extends forward to the front side of the first connector 1227, then extends backward to the space between the first connector 1227 and the main body 1210 (that is, the first segment 2110 passes through the hollow part 1260b formed by the first connector 1227 and the main body 1210), then extends backward to the space between the first connector 1228 and the main body 1210, and finally extends to the anchoring part 2200, which is then connected to the vehicle's anchoring point. In this way, the backrest 1200 of the child safety seat 100 is secured to prevent the backrest 1200 from tilting forward.The first segment 2120 extends directly rearward from the corresponding fixing part 1250 to the anchoring part 2200. When the child safety seat 100 is installed on the vehicle seat 200 in this state, the first segment 2100 is located away from the door, while the second segment 2120 is located close to the door, and does not obstruct the child caregiver from carrying the child in or out. In another embodiment, in the rearward use state, the first end 2111 of the first segment 2110 can extend directly forward from the corresponding fixing part 1250 to the front side of the first connector 1227, then extend rearward between the first connector 1227 and the main body 1210, and finally extend to the anchoring part 2200, which is then connected to the vehicle's anchoring point. Alternatively, the first end portion 2111 of the second segment 2110 extends directly forward from the corresponding fixing portion 1250 to the front side of the first connector 1227, then extends rearward to between the first connector 1227 and the main body 1210, then extends rearward to between the first connector 1228 and the main body 1210, and finally extends to the anchoring portion 2200, which is then connected to the vehicle's anchoring point. As shown in Figure 12, when the child safety seat 100 is in the rear-facing use position, compared to the forward-facing use position in Figure 10, the second segment 2120 disengages from the second connector 1228. As shown in Figure 15, it is cut open from the first connector 1227 (cut open from the center line of the backrest portion 120). As can be seen, the first connector 1227 has a U-shaped bend at its upper end to prevent the strap assembly 2000 from detaching. The lower end of the first connector 1227 extends obliquely into the backrest portion 1200 and is fixed to a reinforcing portion 1240 that is fixedly connected to the main body portion 1210. According to this embodiment, the reinforcing portion 1240 extends perpendicular to the drawing direction, which advantageously ensures the connection strength of the first connector 1227. In the rear-facing use configuration of the child safety seat disclosed herein, the harness assembly 2000 extends rearward from the backrest 1200 to the vehicle anchor point only on one side of the child safety seat 100 in the left-right direction. The other side of the child safety seat 100 does not have a harness assembly 2000 extending rearward from the backrest 1200 to the vehicle anchor point. This ensures that the caregiver's access to or from the child safety seat 100 is unobstructed. Typically, this side is located near the vehicle door. Therefore, when a child enters or exits the child safety seat 100 and the vehicle, the harness assembly 2000 does not need to be removed, making it easier for the caregiver to directly carry the child into or out of the child safety seat 100 and the vehicle from this side, thus making it more convenient to use.Figures 16 to 21 illustrate a child safety seat 100o according to yet another embodiment. For simplicity, only the differences from the embodiments of Figures 10 to 15 are described. As shown in Figure 16, the upper part of the backrest 120 is provided with an upper fixing part 127, and the seat part 11. A lower fixing part 1280 is provided, which is used to connect to the end of the tie wood 2100. An upper fixing part 1270 can be provided in the middle or side of the upper part of the backrest 1200. In one embodiment, the upper fixing part 1270 is provided on the side of the upper part of the backrest 1200 away from the door. In an embodiment where two upper fixing parts 1270 are provided, the two upper fixing parts 1270 can be symmetrically located on the two side wings 1230 on the left and right sides of the backrest 1200, respectively, as shown in Figures 16 and 17, where the upper fixing part 1270 on the right side of the backrest 1200 and the upper fixing part 1270 on the left side of the backrest 1200 can be seen. The lower fixing part 1280 can be provided on the side of the seat 1100. In one embodiment, the lower fixing part 1280 is provided on the side of the seat 1100 near the door. In a practical example where two lower fixing parts 1280 are provided, the two lower fixing parts 1280 can be symmetrically located on the two side wings 1230 on the left and right sides of the seat 1100, as shown in Figures 16 and 17. The structure of the lower fixing part 1280 on the right side of the seat 1100 and the lower fixing part 1280 on the left side of the seat 1100 can be the same as or different from the structure of the aforementioned fixing part 1250, for example, it can be a perforation, a fixing ring, or a fixing hook. In the embodiment where the upper fixing part 1270 or the lower fixing part 1280 shown in Figure 17 is a perforation, the two ends of the strap body 2100 of the strap assembly 2000 (i.e., the first end 2111 and the second end 2121 shown in Figure 17) can pass through the perforation and be fixed to the side of the child safety seat 100 facing the seating space. The two ends 2111 of the strap body 2100, 2121 can be equipped with a retaining element 2700, such as a D-ring or a bow. When the size of the retaining element 2700 is larger than the size of the perforation, it prevents the first end 2111 and the first end 2121 from detaching from the perforation. In one embodiment, the retaining element 2700 is configured such that its size in one direction is larger than the size of the perforation, and its size in another direction is smaller than the size of the perforation. This allows the retaining element 2700 to detach from the perforation along the other direction, thereby detachably connecting the two ends 2111 and 2121 of the strap body 2100 to the upper fixing part 1270 and the lower fixing part 1280, facilitating adjustment of the strap body 21 by the child caregiver.The ends of the upper fixing part 1270 or the lower fixing part 1280 are connected. To increase the strength of at least one of the upper fixing part 1270 and the lower fixing part 1280, as shown in FIG17, the upper fixing part 1270 and / or the lower fixing part 1280 are provided with a reinforcing member 1500, which is fixed to the child safety seat 100. For example, the reinforcing member 1500 may be made of a hard material such as plastic or metal, and may be in a suitable shape such as sheet or block, and may be fixed to the interior of the child safety seat 100 by means of screwing or welding. It should be understood that the child safety seat 100 according to the present disclosure may not have a lower fixing part 1280, as shown in FIG20 described below. In addition, the upper fixing part 1270 and the lower fixing part 1280 may be provided on different sides of the child safety seat 100, or they may be provided on the same side of the child safety seat 100. In other embodiments where the upper fixing part 1270 or the lower fixing part 1280 uses a fixing ring or a fixing hook, the two ends 211 and 2121 of the strap body 2100 can also be detachably connected to the upper fixing part 1270 and the lower fixing part 1280. Figures 17 and 18 show perspective views of the child safety seat 100 according to this embodiment in a forward-facing use state. The upper part of the backrest 1200 has two upper fixing parts 1270o. These two upper fixing parts 1270 can be arranged symmetrically or asymmetrically. The first end 2111 (see Figure 18) and the second end 2121 (see Figure 17) of the strap body 2100 are respectively connected to the two upper fixing parts 1270. The strap assembly 2000 may include an anchoring part 2200 located between the first end 2111 and the second end 2121 for connection to an anchoring point in the vehicle, and an adjusting member 2300 for adjusting the length. The structure of the anchoring part 2200 and the adjusting part 2300 can be the same as in the aforementioned embodiment. As shown in Figures 17 and 18, the strap assembly 2000 extends rearward from the two upper fixing parts 1270 at the upper part of the backrest 1200 and is connected to the vehicle's anchoring point via the anchoring part 2200, thereby fixing the child safety seat 100 to the vehicle seat in a forward-facing use state. Figures 19A and 19B show perspective views of a child safety seat in a rear-facing use state according to one embodiment.In the embodiments shown in Figures 19A and 19B, the two ends of the strap body 2100 are respectively connected to the upper fixing part 1270 and the lower fixing part 1280 on different sides of the child safety seat 100 in the left-right direction. Specifically, the first end 2121 of the strap body 2100 is connected to the lower fixing part 1280 on one side of the child safety seat 100 in the left-right direction, so that the part of the strap body 2100 on this side will not prevent the child caregiver from putting the child into or taking the child safety seat 100 out from this side. The first end 2121 of the strap body 2100 is connected to the upper fixing part 1270 on the other side of the child safety seat 100 in the left-right direction, so that the other part of the strap body 2100 on this other side can connect the upper part of the backrest 1200 to the vehicle's anchor point. This allows the harness assembly 2000 to connect only to the upper part of the backrest 1200 and the vehicle's anchor point in the left-right direction of the child safety seat 100, preventing the child safety seat 100 from tipping forward during vehicle braking or a collision. In this embodiment, when the lower fixing part 1280 connected to the end of the harness body 2100 is located on the side of the child safety seat 100 near the door, and the upper fixing part 1270 connected to the end of the harness body 2100 is located on the other side of the child safety seat 100 away from the door, it greatly facilitates the child caregiver to put the child into or take the child safety seat 100 out from one side of the door. Therefore, when the two ends 2111 and 2121 of the harness body 2100 are detachably connected to the upper fixing part 1270 and the lower fixing part 1280, the child caregiver can adjust the connection of the end of the harness body 2100 to different upper fixing parts 1270 or lower fixing parts 1280 according to the actual situation. Figure 20 shows a perspective view of another embodiment of a child safety seat in a rear-facing use configuration. In the embodiment shown in Figure 20, one end 2121 of the strap body 2100 is connected to an upper fixing portion 1270 located on one side of the child safety seat 100 in the left-right direction, and an anchoring portion 2200 is provided at the other end. This allows the strap body 2100 to connect the upper part of the backrest 1200 to the vehicle's anchoring point on that side of the child safety seat 100 in the left-right direction. Similarly, the strap assembly 2000 can be connected to the upper part of the backrest 1200 to the vehicle's anchoring point on only one side of the child safety seat 100 in the left-right direction.Meanwhile, since there is no strap body 2100 on the other side of the child safety seat 100 in the left-right direction, the child caregiver can easily put the child into or take the child safety seat 100 out from that other side. In this embodiment, the lower footrest 1280 may not be provided. As a variation of the above embodiment, the anchoring part 2200 can be provided between the two ends 2111 and 2121. When the child safety seat 100 is in the rear-facing use state, both ends 2111 and 2121 are connected to the same upper fixing part 1270 of the child safety seat 100. Figure 21 shows a perspective view of another embodiment of the child safety seat in the rear-facing use state. In the embodiment shown in Figure 21, the child safety seat 100 has an upper fixing part 1270 and a lower fixing part 1280 on the same side in the left-right direction, as well as a sliding mechanism 1400 connecting the two. The sliding mechanism 1400 is configured such that the end of the strap body 2100 (e.g., the first end 2111) can slide from one of the upper fixing part 1270 and the lower fixing part 1280 to the other and be positioned by means of the sliding mechanism 1400. In this way, when the child safety seat 100 is switched between forward and rearward use, the end of the strap body 2100 (e.g., the first end 2111) does not need to be disassembled, but can be directly slid to the corresponding upper fixing part 1270 or lower fixing part 1280 and positioned, making it more convenient to use. The sliding mechanism 1400 can be provided as a groove or rail on the outer surface of one or both sides of the child safety seat 100 in the left-right direction (e.g., the outer surface of the side wing 1230). Correspondingly, the ends 2111 and 2121 of the strap body 2100 may be provided with sliding members that can slide on a groove or rail. In a known child safety seat with a top tether, to ensure the connection strength between the top tether and the child safety seat, a reinforcing tube extending along the length direction (longitudinal direction) of the backrest is provided inside the shell of the child safety seat, and the top tether is fixedly connected to the reinforcing tube structure. However, this reinforcement causes problems such as increased product cost and weight, and structural complexity. Figures 1 to 7 show the first embodiment of this disclosure, wherein: Figure 1 shows a front perspective view of the child safety seat H1 and shows details of part A; Figure 2 shows a rear perspective view of the child safety seat H1; Figure 3 shows a rear front view of the child safety seat H1; Figures 4A and 4B show cross-sectional views of the child safety seat H1 according to Figure 1 along section line II; Figure 5 shows details of part A in Figure 4; and Figures 6 and 7 show perspective views of the reinforcing part H150.Referring to Figure 1, the child safety seat H1 includes a seat body H100 for a child to sit in, a harness assembly H200 connecting the seat body H100 to the vehicle, and a base H300 located below the seat body H100. The base H300 is placed on a vehicle seat (not shown) and supports the seat body H1, and can be fixed relative to the vehicle seat. The seat body H100 includes a seat portion H110 that contacts the lower body of the child, a backrest portion H120 that contacts the upper body of the child, and a headrest portion H140 that contacts the head of the child. The backrest H120 includes a backrest body H121 for supporting the child's back and side wings H130 for protecting the child's sides. The backrest H120 has a shell made of a high-strength engineering plastic such as polypropylene (PP) or ABS (Acrylonitrile Butadiene Styrene), and the shell has elongated perforations H123 on both sides. The backrest body H121 and side wings H130 can be directly formed by the shell or covered by the shell. The strap assembly H200 is located on the upper part of the seat body H100 and is used to connect the seat body H100 to the vehicle's anchor point (not shown). The anchor point is generally located on the rear side of the vehicle seat. The strap assembly H200 connects the seat body H100 to the vehicle's anchor point, thereby preventing the seat body H100 from tipping forward during vehicle braking or a collision, thus preventing danger to the child riding in the seat body H100. The tether assembly H200 includes a tether body H210 and an anchoring portion H220, which is used to connect to an anchoring point on a vehicle. According to this embodiment, the anchoring portion H220 is, for example, a hook, used to hook onto the vehicle's anchoring point. The hook is slidably connected to the tether body H210, which is a long strip with a flat cross-section. The tether body H210 can be formed from a single piece of fabric or a combination of multiple pieces of fabric. Optionally, the tether assembly H200 also includes an adjustment member H230 disposed on the tether body H210. The adjustment member H230 is used to adjust the length of the tether body H210 and has an indicator H231 (such as a red-green indicator) capable of visually sensing the tightness of the tether body H210. The indicator H231 is located on one side of the adjustment member H230. When the child safety seat H1 is in the forward-facing position, the harness body H210 extends behind the child safety seat H1, and the side of the adjuster H230 with the indicator H231 faces upward so that the caregiver can observe it.When the side of the adjusting member H230 with the indicator H231 faces the opposite direction, it is not conducive to the caregiver's observation. In use, it is desirable for this display side to always face the caregiver so that the caregiver can observe the tightness of the strap body H210. Therefore, the caregiver needs to flip the end of the strap body H210 to adjust the orientation of the adjusting member H230, which will cause winding on the strap body H210. The adjusting member H230 may also be provided in other forms, and this disclosure is not limited thereto. According to this disclosure, the strap body H210 includes a first segment H211 and a first segment H212. The end of the first segment H211 and the first segment H212 that is away from the seat body H100 is the first end H213. The free ends of the first segment H211 and the second segment H212 form the second end H214 of the strap body H210. The second end H214 is releasably connected to the seat body H100. According to this disclosure, the first end H214 passes through the seat body H100 from the outside of the seat body H100 facing the vehicle and is connected to the inside of the seat body H100 via the connector H240 of the strap assembly H200. For example, the first end H214 can pass through the seat body H100 through the K-shaped perforations H121 on both sides of the backrest H120 as shown in Figures 2 and 3, thereby guiding the strap body H210 from the side of the seat, making the lateral span between the first end H214 of the first segment H211 and the first end H214 of the first segment H212 (which is obscured and not shown) wider, and the backrest H120 can fit more stably against the vehicle backrest. Furthermore, the perforation H121 extends substantially along the height direction of the seat body H100, and the webbing of the strap body H210 extends perpendicularly to the vehicle seat towards the vehicle seat, preventing the webbing from folding during use. In other words, the strap body H210 can always be connected between the vehicle seat and the child safety seat H1 in an unfolded state, thus achieving better tension. According to this disclosure, the child safety seat H1 has a forward-facing use mode (see Figure 4A) and a rear-facing use mode (see Figure 4B). When the child safety seat H1 is installed in the vehicle seat and is in the forward-facing use mode, after the child sits in the seat body H100 facing forward of the vehicle, the opening of the child safety seat H1 faces the front of the vehicle, and the backrest H120 abuts against the back of the vehicle seat. At this time, the strap assembly H200 is located behind the opening of the child safety seat H1 (hereinafter referred to as the forward-facing installation position), so that the anchoring part H220 engages with the anchoring point located behind the vehicle seat.When the child safety seat H1 is installed in the vehicle seat and in rear-facing mode, the child sits in the seat body H100 facing the rear of the vehicle (not shown in the figure). The opening of the child safety seat H1 faces the direction of the vehicle's parking space, and the backrest H120 is away from the back of the vehicle seat. At this time, the tether assembly H200 is located behind the opening of the child safety seat H1 (hereinafter referred to as the rear-facing installation position) so that the anchoring part H220 can engage with the anchoring point located behind the vehicle seat. The cross-section of the tether body H210 is flat. When the tether assembly H200 moves from the rear-facing installation position to the forward-facing installation position, the tether body H210 will flip inward and outward, that is, the inner side of the tether body H210 flips to the outer side. In the known child safety seats, one end of the top tether is fixedly connected to the reinforcing tube. When the anchor H220 engages with the anchor point, the tether body H210 between the anchor H220 and the connector will fold, causing wear to the tether body H210. Referring to the enlarged view in Figure 1, the connector H240 and the reinforcing part H15 are separate components, and the connector H240 can move freely relative to the reinforcing part H150. When the tether assembly H200 moves from the rear-facing installation position to the forward-facing installation position, the second end H214 of the tether body H210 can drive the connector H240 to rotate, preventing the tether body H210 from folding due to rotation. Figures 1 to 4A show the child safety seat H1 in forward-facing mode. In this state, the strap body H210 is in the forward-facing installation position, meaning the strap body H210 of the strap assembly H200 is away from the front of the child safety seat H1 and extends rearward to the anchor point of the vehicle seat. In the rearward use mode shown in Figure 4B, the strap body H210 is in the rearward-facing installation position, meaning the strap body H210 extends in the direction opposite to Figures 1 ± 3 and extends from the front of the child safety seat H1 to the anchor point of the vehicle seat. According to this embodiment, the child safety seat H1 also includes a reinforcement H150. The reinforcement H150 is disposed between the seat body H100 and the connector H240 to strengthen the connection between the strap body H210 and the seat body H100. Referring to Figures 1, 4A, 5, 6, and 7, the reinforcement H150 is described. Figure 5 shows the details of part A in Figure 4A. The backrest H120 of the seat body H100 has a main body H121 for a child to lean against and a connecting part H122 integrally formed with the main body H121. The connecting part H122 is used to connect with the side wing H126.A reinforcing part H150 is provided at the connecting part H122, and a through hole H121 is provided at the connecting part H122 for the first section H211 of the strap body H210 to pass through. In addition, the seat body H100 also includes a crossbar H160, which is provided at the backrest part H120 and extends along the width direction of the seat body H100. The crossbar H160 can strengthen the backrest part H120 and can also serve as a shoulder strap tube H160 for supporting and reversing the shoulder strap H162 of the child safety seat H1. The crossbar H160 is fixed to the backrest part H120 by screws H161. The reinforcing part H150 has an abutting part H153 and a fixing part H154. The abutting part H153 is perpendicular to the backrest part H121 and is set as a plane for abutting against the connector H240 of the strap body H210. Two fixing parts H154 are provided. In Figure 5, the fixing part H154 in the upper right and the fixing part H154 in the lower left extend vertically in opposite directions from both sides of the abutment part H153. The two fixing parts H154 are parallel to each other and each has a connecting hole H157. In order to fix the reinforcing part H150 to the backing part H120, a screw can be screwed through the connecting hole H157 into the fixing hole H124 provided in the backing part H120. After the reinforcing part H150 is fixed to the backing part H120, the side wing H126 is attached to the attachment part H122 of the backing part H120, thereby blocking the fixing part H154 in the lower left of Figures 1 and 5, so as to prevent the screw from accidentally loosening and detaching, causing the reinforcing part H150 to detach from the backing part H120. The reinforcing part H150 also has a guide part H152 protruding from the abutment part H153. The guide part H152 extends from the surface of the abutment part H153 to a through hole H123 in the housing of the seat back part H120 (see Figure 5). A guide hole H151 is formed inside the guide part H152. The opening on one side of the guide hole H151 is aligned with the through hole H121, and the opening on the other side is located on the surface of the abutment part H153 away from the through hole H121. The strap body H210 passes through the guide hole H151 and exits the housing of the backrest part H120 through the through hole H121. This can better guide the sliding of the strap body H210 relative to the seat body H100 and prevent the strap body H210 from folding or getting stuck. In other embodiments, the guide part H152 may not extend to the through hole H121, and this disclosure is not limited thereto.The guide hole H151 has an elongated cross-section at the surface of the abutment portion H153 (see Figure 6) and extends along the length of the seat body H100 (see Figure 1). The guide hole H151 has a widened portion H158 in the middle. For example, the width of the opening of the guide hole H151 at the surface of the abutment portion H153 gradually increases from both ends to the middle. The width of the widened portion H158 in the middle of the guide hole H151 is greater than the width of its two ends. Therefore, when the strap assembly H200 is in a forward-facing or rearward-facing mounting position and is tightened, the narrower ends of the guide hole H151 prevent the strap body H210 from sliding. When the strap assembly H200 switches between the forward-facing and rearward-facing mounting positions, the strap body H210 can flip its direction at the wider widened portion H158 to avoid winding and folding. In this embodiment, two perforations H123 are respectively provided on the left and right sides of the housing of the backrest H120. Therefore, when the strap body H210 is in the rear mounting position, the strap body H210 will not wrap around the housing of the backrest H120 from the back to the side, thus reducing the friction area between them. Furthermore, when the strap body H210 switches between the front mounting position and the rear mounting position, the strap body H210 will not contact the rear and side corners of the backrest H120, also preventing the strap body H210 from wrapping or folding. In other embodiments, the perforations H123 can also be provided on the back of the backrest H120. The connector H240 of the strap assembly H200 is a flat buckle H240o. As shown in Figure 1, the connector H240 is a long strip of material that extends substantially along the height direction of the seat body H100 when the strap body H210 is taut. The connector H240 has at least two parallel openings H241. The free end of the first end H214 of the strap body H210 passes sequentially through at least two parallel openings H241 and overlaps with the remainder of the first end H214 after a 180-degree turn in direction. This connection can be fixed, for example, by stitching or gluing (see Figure 5). The connector H240 may also have three or more parallel openings H241. The flat side of the connector H240 abuts against the surface of the reinforcement H150. The area of ​​the flat side is larger than the opening area of ​​the guide hole H153 at the abutment H153. Thus, when the first end H213 of the strap body H210 is fixed to the vehicle seat, the connector H240 can engage with the abutment H153 from the inside of the seat, providing engagement for the second end H214 of the strap body H210.Because the opening of the guide hole H153 is elongated, and the connector H240 is designed as a flat, elongated sheet, during installation, the connector H240 can be first inserted horizontally into the guide hole H153 from the outside of the seat. After extending through the guide hole H153 to the inside of the seat, the connector H240 is reversed to engage with the abutment part H153 (see Figure 5). When the cloth child safety seat H1 changes from the forward-facing mode in Figures 1 to 3 to the rear-facing mode or vice versa, the harness body H210, for example, will change from extending rearward as shown in Figure 1 to extending forward. In this case, for example, the display side of the adjustment piece H230 of the harness body H210 used to show the tightness of the harness body H210 will be flipped, making it difficult for the caregiver to easily observe the tightness of the harness body H210. If the caregiver wishes to directly see the side of the display, the tie body H210 needs to be rotated H180 degrees within the guide hole H151, and similarly, the connector H240 needs to be rotated H180 degrees from the state shown in Figure 1. During the rotation, the webbing of the tie body H210 deforms and is compressed within the guide hole H153 due to its width, potentially becoming stuck. According to this disclosure, a gradually widening extension H158 is provided within the guide hole H153 to prevent the webbing from being stuck in the guide hole H153 when rotating the connector H240 and the tie body H210. Referring to Figure 5, the reinforcing part H150 also has a protrusion H156 perpendicular to the abutment part H153, used to abut against the main body H121 of the backing part H120. Simultaneously, the protrusion H156 strengthens the fixing part H154. According to this disclosure, the protrusion H156 and the crossbar H160 are shape-adapted, and their specific forms can be changed accordingly. This disclosure is not limited to the illustrations. In addition, the reinforcing part H150 is provided with a plurality of ribs H155 on the side opposite to the connector H240. These ribs H155 can engage with the protrusions H155 provided at the main body H121 of the backrest part H120 or the joint part H122, thereby providing additional shape engagement to avoid misalignment and strengthen the component (see Figures 5 and 7). Figures 8 to 12 show the second embodiment of this disclosure. Figure 8 shows a front perspective view of the child safety seat H1 according to the second embodiment and shows details of part B. Figure 9 shows a front perspective view of the child safety seat H1 according to the first embodiment. Figure 10 shows a perspective view of the tether assembly H200 according to the second embodiment. Figure 11 shows a cross-sectional view of the child safety seat H1 according to Figure 9 along section line II-II. Figure 12 shows a detail view of part B in Figure 11.To avoid repetition, only the differences from the first embodiment are described. According to the first embodiment, reinforcing portions H170 are provided at both ends of the crossbar H160 near the joint H122 of the backing portion H120. The reinforcing portions H170 are flat reinforcing iron sheets, having a fixing portion H171 and an opening H172 fixedly connected to the crossbar H160. The reinforcing portion H170 is generally rectangular. As shown in FIG. 9, notches may also be provided on the sides of the rectangle to avoid components or formed parts on the backing portion H120. The fixing portion H171 is provided on one side of the reinforcing portion H170, for example, at a corner of the rectangle. The opening H172 is provided in the middle of the reinforcing portion H170 and is elongated. The fixing portion H171 can be a circular hole located at one end of the reinforcing portion H170. After the crossbar H160 is inserted into the circular hole and welded together, the connection strength is further increased. According to this disclosure, the reinforcing part H170 extends from the crossbar H160 at an angle relative to the height direction of the seat body H100, and the opening H172 is located at the other end of the reinforcing part H170 and extends along the height direction of the seat body H100, thereby enabling the strap body H210 to always be connected between the vehicle seat and the child safety seat H1 in an extended state. Optionally, the opening H172 of the reinforcing part H170 also has a widening portion in the middle.

[0091] (Not shown in the figure), so that the width of the middle part of H172 is greater than the width of the two ends. Figures 13, 14 and 15 show a third embodiment of the present disclosure, wherein, Figure 13 shows a front perspective view of the child safety seat H1 according to the third embodiment and shows details of part C, Figure 14 shows a cross-sectional view of the child safety seat H1 of Figure 13 along section line III; Figure 15 shows a detail view of part C in Figure 14. In the third embodiment, a first reinforcing part H150 is provided at the joint H122 of the backrest part H120, and a second reinforcing part H170 is provided parallel to the first reinforcing part H150, and the second reinforcing part H170 is fixed to the crossbar H160. The connector H240 of the harness assembly H200 passes sequentially through the through hole H123 in the seat body H100, the guide hole H151 of the first reinforcement H150, and the opening H172 of the first reinforcement H170, and abuts against the first reinforcement H170, thereby further strengthening the connection between the harness assembly H200 and the seat body H100. According to this disclosure, reinforcement H150 and / or reinforcement H170 are fixedly connected to the seat body H100 of the child safety seat H1 at the connection point corresponding to the harness assembly H200. Reinforcement H150 and / or reinforcement H170 are used to strengthen the connection position of the harness assembly H200 on the child safety seat H1. Reinforcement H150 and / or reinforcement H170 can be made of plastic, which is low in cost, lightweight, and easy to process. Reinforcement H150 and / or reinforcement H170 can also be made of other materials. By providing reinforcing parts H150 and / or H170, the backrest H120 of the child safety seat H1 can be molded more easily, thereby saving materials and reducing manufacturing difficulty. Since this application can be embodied in various forms without departing from its spirit and essence, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted most broadly 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

Claims 1. A child safety seat, comprising: The seat body includes a seat portion and a backrest portion connected to the seat portion; A strap assembly, connected to the seat body, is used to connect the seat body to an anchor point in the vehicle; wherein, when the child safety seat is in a forward-facing position, the strap assembly connects the backrest to the vehicle anchor point on both sides of the child safety seat in the left-right direction; when the child safety seat is in a rear-facing position, the seat is located behind the backrest, and the strap assembly connects the upper part of the backrest to the vehicle anchor point on only one side of the child safety seat in the left-right direction.

2. The child safety seat according to claim 1, wherein: When the child safety seat is in the rear-facing use position, a portion of the harness is located on one side of the child safety seat in the left-right direction and extends rearward from the backrest, while another portion of the harness assembly is located on the other side of the child safety seat in the left-right direction and extends rearward from the seat.

3. The child safety seat according to claim 1, wherein, The tether assembly includes an anchoring portion and a tether body passing through the anchoring portion. The anchoring portion is located between two ends of the tether body or at one end of the tether body for connection to an anchoring point of the vehicle. The upper part of the backrest is provided with an upper fixing portion, and at least one end of the tether body is connected to the upper fixing portion.

4. The child safety seat according to claim 3, wherein, The upper fixing part includes two parts, which are located on the left and right sides of the backrest. When the child safety seat is in the forward-facing use state, the two ends of the strap body are respectively connected to the two upper fixing parts. When the child safety seat is in the rear-facing use state, one end of the strap body is connected to the upper fixing part located on only one side of the child safety seat in the left-right direction.

5. The child safety seat according to claim 3, wherein, The seat is provided with a lower fixing part, and one end of the strap body can be connected to the lower fixing part. When the child safety seat is in the rear-facing use state, one end of the strap body connected to the seat body is connected to the upper fixing part located on the left-hand side of the child safety seat, and the other end is connected to the lower fixing part.

6. The child safety seat according to claim 5, wherein, The lower fixing part includes two parts, which are located on the left and right sides of the seat respectively. When the child safety seat is in the rear-facing use state, the two ends of the strap body are respectively connected to the upper fixing part and the lower fixing part located on different sides of the child safety seat in the left and right direction.

7. The child safety seat according to claim 5, wherein, The child safety seat has an upper fixing part and a lower fixing part, as well as a sliding mechanism connecting the two, on the same side in the left-right direction. The sliding mechanism is configured such that one end of the strap body can slide from one of the upper fixing part and the lower fixing part to the other and be positioned by means of the sliding mechanism. 24 8. The child safety seat according to claim 7, wherein, The sliding mechanism is a groove or rail provided on the outer surface of the child safety seat.

9. The child safety seat according to claim 1, wherein, The tether assembly includes an anchoring portion and a tether body passing through the anchoring portion. The anchoring portion is located between two ends of the tether body or at one end of the tether body for connection to an anchoring point of the vehicle. The upper part of the backrest is provided with an upper fixing portion, and the seat is provided with a lower fixing portion. The two ends of the tether body are configured to detachably connect the upper fixing portion and the lower fixing portion.

10. The child safety seat according to claim 1, wherein, The backrest housing has a perforation; the strap assembly has a strap body, an anchoring part, and a connector, wherein the strap body has a flat cross-section and passes through the perforation in the housing, a first end of the strap body is located on the outside of the housing, and a second end of the strap body is located on the inside of the housing; the anchoring part is connected to the first end and is adapted to connect to an anchor point of the vehicle; the connector is connected to the second end; and at least one reinforcing part is disposed between the housing and the connector to strengthen the connection between the strap body and the seat body, wherein when the anchoring part moves between a front mounting position and a rear mounting position of the seat body, the connector can rotate relative to the reinforcing part to prevent the strap body from folding.

11. The child safety seat according to claim 10, wherein: The at least one reinforcing part includes a first reinforcing part having an abutment portion for fixed connection to the seat body and a guide portion protruding from the abutment portion; wherein the guide portion has a guide hole extending from the abutment portion to the through hole, the strap body passing through the guide hole, the guide hole having a cross-section that is elongated and extends along the length direction of the backrest portion, and the guide hole having a widened portion in the middle such that the width of the middle portion of the guide hole is greater than the width of the end portion.

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