Fixing belt assembly, connecting and fixing apparatus, isofix connecting assembly, and carrier

Abstract

Provided in the present disclosure are a fixing belt assembly, a connecting and fixing apparatus, an ISOFIX connecting assembly, and a carrier, the fixing belt assembly being used for fixing the carrier to a vehicle seat, the carrier comprising a box body and a bottom support member, and the bottom support member being detachably connected to the box body and arranged below the box body.

Description

[0001] The present disclosure relates to the field of securing strap assemblies, connecting fixtures, ISOFIX connecting assemblies, and carrier technologies, and in particular to a carrier suitable for use on a vehicle seat. Background Some carriers in existence require separate LATCH components and / or Top Tether assemblies to be secured to a vehicle seat. That is, a user needs to have LATCH components and / or Top Tether assemblies readily available in order to secure a carrier when needed. However, when not in use, such components are prone to being scattered and not easily stowed, or require additional space for stowage, which can also result in loss of related parts. The present disclosure provides a securing strap assembly for securing a carrier to a vehicle seat. The carrier includes a box body and a bottom support member detachably connected to the box body and disposed below the box body. The securing strap assembly is configured to connect with the carrier, and at least a portion of the securing strap assembly is stowable in a stowage space of the carrier. In an embodiment, the stowage space is disposed in the bottom support member. In an embodiment, the securing strap assembly includes a first strap assembly and a second strap assembly. The first strap assembly has at least a portion thereof wrapped from a side of the carrier away from a backrest of the vehicle seat to a bottom of the carrier, and an end of the first strap assembly is provided with a first connecting device connected to a top of the vehicle seat. The second strap assembly is disposed at the bottom of the carrier, and an end of the second strap assembly is connected to another end of the first strap assembly, and another end of the second strap assembly is provided with a second connecting device connected to the vehicle seat to secure the carrier to the vehicle seat. In an embodiment, the first strap assembly and the second strap assembly are fixedly connected to each other, or the first strap assembly and the second strap assembly are integrally formed. In an embodiment, the stowage space includes a first stowage slot and a second stowage slot. The first stowage slot is configured to stow the second connecting device and at least a portion of the second strap assembly, and the second stowage slot is configured to stow the first connecting device and at least a portion of the first strap assembly. In an embodimentIn an embodiment, the first receiving slot and the second receiving slot are respectively arranged on opposite sides of the bottom support along a width direction thereof. In an embodiment, the first receiving slot is arranged at a middle of a side of the bottom support close to a backrest of the vehicle seat, and the second receiving slot is arranged at a middle of an opposite side of the first receiving slot. In an embodiment, the carrier further comprises a bottom cover arranged outside the bottom support. The bottom cover is provided with a first receiving cover and a second receiving cover capable of being opened and closed, wherein the first receiving cover is configured to shield the first receiving slot, and the second receiving cover is configured to shield the second receiving slot. In an embodiment, the bottom support is provided with a fixing belt limiting structure configured to position the fixing belt assembly so that the fixing belt assembly is at least partially connected to the carrier. In an embodiment, the fixing belt limiting structure comprises: a first limiting structure configured to limit the second belt assembly, the first limiting structure being arranged close to the second connecting device or on a side of the bottom support close to the backrest of the vehicle seat; and a second limiting structure configured to limit the first belt assembly and / or the second belt assembly, the second limiting structure being arranged close to a connecting point of the first belt assembly and the second belt assembly or on a side of the bottom support away from the backrest of the vehicle seat. In an embodiment, the number of the first limiting structures is proportional to the number of the second connecting devices, and the number of the second limiting structures is proportional to the number of the ends of the first belt assembly connected to the second belt assembly. In an embodiment, the carrier further comprises: a reinforcing support arranged on a bottom side of the bottom support, wherein the fixing belt limiting structure is arranged on the reinforcing support. In an embodiment, the reinforcing support comprises: a first reinforcing rod extending along a length direction of the bottom support; and a second reinforcing rod connected to the first reinforcing rod and extending along a width direction of the bottom support. The fixing belt limiting structure comprises the first limiting structure configured to limit the second belt assembly and the second limiting structure configured to limit the first belt assembly, and the first limiting structure is arranged at one end of the first reinforcing rod and the second reinforcing rod.the second reinforcing rods are arranged between the two first reinforcing rods and are spaced apart from each other to form a ring structure with the two first reinforcing rods. The two first reinforcing rods are respectively provided with one of the first limiting structures, and the two second reinforcing rods are respectively provided with one of the second limiting structures. In an embodiment, the second reinforcing rod has a non-linear structure, such that the distance between the two second limiting structures is greater than or equal to the distance between the two first limiting structures. In an embodiment, the second reinforcing rod has a non-linear structure and includes a first section and a second section, the first section extends linearly along a transverse axis direction, and the second section is slightly inclined relative to the transverse axis direction, such that the second sections of the two second reinforcing rods are inclined toward each other. In an embodiment, the fixed strap limiting structure includes two first limiting structures and two second limiting structures. The distance between the two second limiting structures is greater than or equal to the distance between the two first limiting structures. In an embodiment, the second reinforcing rod includes an extension section, the extension section has an arc-shaped structure to match a side of the bottom support away from the backrest of the vehicle seat, and the second limiting structure is arranged on the extension section. In an embodiment, the fixed strap limiting structure includes a seat body and a limiting rod, the seat body is arranged on the reinforcing support, and the limiting rod is arranged on the seat body, such that the fixed strap assembly passes between the seat body and the limiting rod. In an embodiment, two fixed strap limiting structures are arranged at two ends of the bottom support along a longitudinal axis direction of the bottom support, and limit the second strap assembly respectively. In an embodiment, the two fixed strap limiting structures are symmetrically arranged about a center line of the bottom support in the longitudinal axis direction. In an embodiment, the fixed strap limiting structure has a first tubular structure and / or a second tubular structure. The first tubular structure has a length extending along the longitudinal axis direction, and a through gap is formed therein for the fixed strap assembly to pass through. The second tubular structure is arranged to be connected to the first tubular structureThe first tubular structure and the second tubular structure are arranged to cross each other, and wherein the first tubular structure, or the second tubular structure, or the first tubular structure and the second tubular structure form a passing gap for the fixing belt assembly to pass through. In an embodiment, the first tubular structure and the second tubular structure are arranged substantially perpendicularly. In an embodiment, at least a portion of the second tubular structure is inclined relative to the longitudinal direction and the lateral direction of the carrier, so that the distance between the first ends of the two second tubular structures of the two fixing belt limiting structures is smaller than the distance between the second ends of the two second tubular structures. In an embodiment, the first tubular structure and the second tubular structure are separate structures that are sleeved and communicated with each other. In an embodiment, the first tubular structure and the second tubular structure are integrally formed. In an embodiment, the reinforcing support comprises a reinforcing rod arranged at the middle position of the bottom support in the lateral direction and extending in the longitudinal direction. In an embodiment, two support feet are arranged on the bottom support, the two support feet are respectively located at the two ends of the bottom support in the longitudinal direction, and the two ends of the reinforcing rod are respectively defined between each support foot and the bottom support, so that the reinforcing rod is limited. In an embodiment, the fixing belt limiting structure is arranged to be two, and the two fixing belt limiting structures are respectively arranged at the two ends of the reinforcing rod to limit the second belt assembly respectively. In an embodiment, the fixing belt limiting structure has a first tubular structure or a second tubular structure. The first tubular structure has a length extending in the longitudinal direction, is sleeved and fixed on the reinforcing rod, and a passing gap for the fixing belt assembly to pass through is formed between the inner surface of the first tubular structure and the outer surface of the reinforcing rod. The second tubular structure is arranged to cross the first tubular structure, and wherein the passing gap for the fixing belt assembly to pass through is formed. In an embodiment, the fixing belt limiting structure comprises a first tubular structure and a second tubular structure. The first tubular structure has a length extending in the longitudinal direction and is sleeved on the reinforcing rod. The second tubular structure is arranged to cross the first tubular structure. A passing gap for the fixing belt assembly to pass through is formed between the inner surface of the second tubular structure and the outer surface of the reinforcing rod.a gap. In an embodiment, the sidewalls of the first tubular structure inside the second tubular structure form a rib, and the gap is between the rib and an inner surface of an upper wall of the second tubular structure. In an embodiment, the reinforcing rod is between two sidewalls of the first tubular structure. In an embodiment, the first tubular structure and the second tubular structure are separate structures that are nested and connected to each other. In an embodiment, the first tubular structure and the second tubular structure are integrally formed as a whole structure. The present disclosure also provides a carrier. The carrier includes a securing strap assembly according to any of the preceding embodiments. The present disclosure provides a cushioning structure. The cushioning structure is disposed on a connection securing device for securing a carrier to a vehicle seat. The connection securing device has a first connection end and a second connection end. The first connection end is connected to a first anchoring point, and at least a portion of the connection securing device is disposed under the carrier from a side of the carrier away from a backrest of the vehicle seat, so that the second connection end is connected to a second anchoring point. In an embodiment, the cushioning structure is disposed between the first connection end and the second connection end of the connection securing device. In an embodiment, the cushioning structure is disposed at a bottom of the carrier. In an embodiment, the cushioning structure includes at least one cushioning strap, and both ends of the at least one cushioning strap are connected to the connection securing device by a first fixing member and a second fixing member, respectively. In an embodiment, at least one of the cushioning straps is disposed above the connection securing device. In an embodiment, the at least one cushioning strap includes a cushioning strap in a ring structure or used in a folded manner. In an embodiment, the at least one cushioning strap includes a plurality of cushioning straps, and the plurality of cushioning straps have the same elongation rate or different elongation rates. In an embodiment, an initial effective length of the cushioning strap between the first fixing member and the second fixing member is less than an initial effective length of the connection securing device between the first fixing member and the second fixing member. In an embodiment, an elongation rate of the cushioning strap is greater than an elongation rate of the connection securing device provided with the cushioning strap. In an embodiment, the cushioning structure includes at least one first knotting point disposed on the connection securing device and located between the first fixing member and the second fixing member.between the first and second anchors. In an embodiment, the buffer structure includes at least one first knot point disposed on the connection fixing device and located between the first and second anchors. The present disclosure also provides a connection fixing device. The connection fixing device includes: a first belt connection assembly and a second belt connection assembly detachably connected to each other, one end of the first belt connection assembly constituting a first connection end of the connection fixing device, the other end of the first belt connection assembly connected to one end of the second belt connection assembly, and the other end of the second belt connection assembly constituting a second connection end of the connection fixing device; and the buffer structure according to any one of the preceding embodiments. In an embodiment, the first belt connection assembly includes a first belt structure and a second belt structure having different elongation rates. The first belt structure and the second belt structure are used alternatively and are detachably connected to the second belt connection assembly, respectively. In an embodiment, the elongation rate of the first belt structure is greater than that of the second belt structure. The first belt structure is connected to the second belt connection assembly when the first anchoring point is closer to the carrier. The second belt structure is connected to the second belt connection assembly when the first anchoring point is farther away from the carrier. In an embodiment, the buffer structure is disposed on at least one of the first belt structure, the second belt structure, and the second belt connection assembly. The present disclosure also provides a carrier. The carrier is fixed to a vehicle seat through the connection fixing device according to any one of the preceding embodiments. In an embodiment,The carrier includes a box body and a bottom support connected to the box body. Two belt limiting structures are provided on the bottom support, and are respectively located at two ends of the bottom support in a longitudinal axis direction, so that at least a part of a connecting fixing device passes through. The buffer structure is provided on the part of the connecting fixing device passing through the belt limiting structure. The present disclosure provides a connecting fixing device for fixing a carrier to a vehicle seat. The connecting fixing device has a first connecting end and a second connecting end connected to a first anchor point and a second anchor point, respectively. At least a part of the connecting fixing device is wrapped around a side of the carrier away from a backrest of the vehicle seat. The connecting fixing device includes a first belt connecting assembly and a second belt connecting assembly detachably connected to each other. The first belt connecting assembly includes a first belt structure and a second belt structure. The first belt structure and the second belt structure are alternatively used and detachably connected to the second belt connecting assembly. The first belt structure and the second belt structure have different extension rates. In an embodiment, the first connecting end of the connecting fixing device is connected to a first anchor point on or above a top of the vehicle seat. At least a part of the connecting fixing device is wrapped around from a side of the carrier above the carrier away from the backrest of the vehicle seat to a side of the carrier below the carrier, so that the second connecting end of the connecting fixing device is connected to a second anchor point on the vehicle seat. In an embodiment, the first belt structure includes a first belt body and a first end and a second end respectively located at two ends of the first belt body. When the first belt structure is connected to the second belt connecting assembly, the first end of the first belt structure constitutes the first connecting end of the connecting fixing device, and the second end is detachably connected to the second belt connecting assembly. The second belt structure includes a second belt body and a first end and a second end respectively located at two ends of the second belt body. When the second belt structure is connected to the second belt connecting assembly, the first end of the second belt structure constitutes the first connecting end of the connecting fixing device, and the second end is detachably connected to the second belt connecting assembly. The second end of the second belt connecting assembly constitutes the second connecting end. In an embodiment, the extension rate of the first belt structure is greater than that of the second belt structure.The first strap structure has an elongation rate. The first strap structure is connected with the second strap connecting component when the first anchoring point is closer to the carrier. The second strap structure is connected with the second strap connecting component when the first anchoring point is farther from the carrier. In an embodiment, the elongation rate of the first strap structure is 17% to 26%, and the elongation rate of the second strap structure is 7% to 16%. In an embodiment, the elongation rate of the first strap structure is 21%, and the elongation rate of the second strap structure is 12%. In an embodiment, the initial effective length of the first strap structure is greater than the initial effective length of the second strap structure. In an embodiment, a buffer structure is arranged on at least one of the first strap structure, the second strap structure, and the second strap connecting component. In an embodiment, the first strap structure and the second strap structure are Top Tether components, and the second strap connecting component is a LATCH component. The present disclosure provides an ISOFIX connecting component for fixing a carrier box to a vehicle seat. The ISOFIX connecting component includes a clamping portion, a connecting portion, and a mounting portion. The clamping portion is connected with an ISOFIX interface arranged on the vehicle seat. The mounting portion is fixedly connected to the carrier box. The connecting portion is fixedly connected to the clamping portion and movably connected to the mounting portion to drive the clamping portion to move relative to the mounting portion. In an embodiment, the connecting portion can move along the mounting portion in the longitudinal direction of the carrier box to adjust the position of the clamping portion relative to the carrier box, so as to be suitable for fixing the carrier box to different positions of the vehicle seat. In an embodiment, the connecting portion includes a sliding member and a connecting member. The sliding member is slidably pivoted to the mounting portion. The connecting member is connected between the clamping portion and the sliding member to drive the clamping portion to slide and / or pivot relative to the mounting portion. In an embodiment, the mounting portion is in a circular tube shape, and the sliding member is formed as a circular sleeve that is sleeved outside the mounting portion. In an embodiment, the ISOFIX connecting component is provided with at least two clamping portions. The connecting member includes a synchronization member and a connecting member. The synchronization member connects the at least two clamping portions together to synchronize the movement of the at least two clamping portions. The connecting member is connected between the synchronization member and the sliding member.between the connection portion and the mounting portion. In an embodiment, the locking device includes a locking member and a release operating member. The locking member is capable of engaging with a locking portion provided on the mounting portion and has a locking position and a release position. When the locking member is in the locking position, the locking member engages with the locking portion and the connection portion is locked relative to the mounting portion. When the locking member is in the release position, the locking member disengages from the locking portion and the connection portion is capable of being released relative to the mounting portion. The release operating member is operated to move the locking member from the locking position to the release position. In an embodiment, the release operating member is fixedly connected with the locking member and is slidably provided relative to the mounting portion to move together with the locking member relative to the mounting portion. In an embodiment, the locking portion includes a first locking portion and a second locking portion. The first locking portion and the second locking portion are provided at different positions along the longitudinal direction of the mounting portion to enable the connection portion to be locked relative to the mounting portion at different positions. In an embodiment, the locking device further includes a return member which provides a force to bias the locking member towards the locking position. In an embodiment, a limiting member is further provided on the ISOFIX connection assembly, the limiting member is provided at both ends of the mounting portion to limit the connection portion. In an embodiment, the connection portion is capable of pivoting relative to the mounting portion to enable the connection portion and the engagement portion to be stowed in the box. The locking portion further includes a third locking portion provided at opposite sides of the first locking portion and the second locking portion for engaging with the locking member to lock the stowed connection portion. In an embodiment, the connection portion is capable of pivoting relative to the mounting portion to enable the connection portion and the engagement portion to be stowed in the box, and a locking mechanism is provided on the box for locking the stowed connection portion. In an embodiment, the locking mechanism includes a connection seat connected to the box and a locking member provided on a side of the connection seat close to the connection portion. In an embodiment, the locking member is capable of engaging with the third locking portion to lock the stowed connection portion.In an embodiment, the locking member is a reverse buckle protruding from the side of the connecting seat, capable of interference fit with the connecting portion to lock the ISOFIX connecting assembly. In an embodiment, the locking member is a spring piece arranged on the side of the connecting seat. When the ISOFIX connecting assembly is received, at least a portion of the connecting portion presses against the spring piece to deform the spring piece, so as to lock between the spring piece and the box body beyond the spring piece. In an embodiment, the locking member is an elastic protrusion arranged on the box body, and a groove is correspondingly arranged on the connecting portion, the elastic protrusion and the groove are matched with each other to lock the ISOFIX connecting assembly. The present disclosure also provides a carrier. The carrier includes a box body. The box body provides a containing space and includes a box body and a bottom support. The bottom support is detachably connected to the box body. The ISOFIX connecting assembly according to any one of the preceding embodiments is arranged on the bottom support. In an embodiment, the bottom support is provided with an assembly receiving groove, and the assembly receiving groove provides a receiving space for receiving the ISOFIX connecting assembly. In an embodiment, the bottom support is provided with a locking mechanism, and when the ISOFIX connecting assembly is received in the assembly receiving groove, the locking mechanism locks the connecting portion of the ISOFIX connecting assembly to keep the ISOFIX connecting assembly in the assembly receiving groove. In an embodiment, the locking mechanism is arranged at the edge of the assembly receiving groove. In an embodiment, the carrier further includes a reinforcing support, the reinforcing support is arranged on the bottom side of the bottom support, and includes a first reinforcing rod and two second reinforcing rods, the first reinforcing rod extends in the longitudinal direction, and the first reinforcing rod is connected between the two second reinforcing rods. The mounting portion is arranged between the two second reinforcing rods and is spaced apart from the first reinforcing rod. In an embodiment, the two ends of the mounting portion are respectively connected to the respective one end of the two second reinforcing rods, and the two ends of the first reinforcing rod are respectively connected to the respective other end of the two second reinforcing rods or near the respective other end. In an embodiment, the carrier further includes a fixing belt assembly, the fixing belt assembly is connected to the box body to fix the box body to the vehicle seat,Also included is a belt, a first connection end, and a second connection end. The belt is located between the first connection end and the second connection end, the first connection end is connected to the vehicle seat, at least a portion of the belt is routed to a side of the vehicle seat away from a backrest of the vehicle seat, and the second connection end is connected to the bottom support or the ISOFIX connection assembly. In an embodiment, the second connection end is connected to a mounting portion of the ISOFIX connection assembly. In an embodiment, the bottom support has a fixed belt receiving slot for receiving the fixed belt assembly. In an embodiment, the bottom support has a belt fixing structure for connecting at least a portion of the fixed belt assembly to the bottom support. The belt fixing structure is located at a side of the bottom support away from the backrest of the vehicle seat, and the second connection end of the fixed belt assembly is connected to the belt fixing structure. In an embodiment, the belt fixing structure includes a fixing seat and a fixing pin. The fixing seat is located at or near an edge of the bottom support at a side away from the backrest of the vehicle seat. The fixing pin is located within the fixing seat and is spaced apart from a bottom surface of the fixing seat so that the second connection end of the fixed belt assembly is routed around the fixing pin. BRIEF DESCRIPTION OF DRAWINGS The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application. FIG. 1 is a perspective view of a carrier secured to a vehicle seat according to a first embodiment of the present disclosure. FIG. 2 is another perspective view of the carrier and a fixed belt assembly of FIG. 1, with a bottom cover removed from the carrier. FIGS. 3 and 4 are perspective views of the fixed belt assembly and the carrier of FIG. 2, respectively. FIGS. 5A-5C show perspective views of various components of a bottom support. FIG. 6 is a perspective view of a reinforcing bracket of the carrier according to the first embodiment of the present disclosure. FIG. 7A is a perspective view of a first limiting structure of the carrier according to the first embodiment of the present disclosure. FIGS. 7B and 7C are perspective views of a second limiting structure of the carrier according to the first embodiment of the present disclosure. FIG. 8 is a bottom perspective view of the carrier and the fixed belt assembly of FIG. 1 in a use state. FIG. 9 is a perspective view of the carrier of FIG. 8 with the fixed belt assembly received therein.10 is a perspective view of the carrier and securing strap assembly of FIG. 10 secured to a vehicle seat according to a second embodiment of the present disclosure. FIG. 11 is a perspective view of the carrier and securing strap assembly of FIG. 10 viewed from another angle. FIG. 12A is another perspective view of the carrier and securing strap assembly of FIG. 11 with the bottom cover of the carrier removed. FIG. 12B is a partial cross-sectional view taken along line H-H in FIG. 12A. FIG. 12C is a partial cross-sectional view taken along line J-J in FIG. 12A. FIG. 13 is a perspective view of the carrier of FIG. 11 in another state with the securing strap assembly stowed. FIG. 14 is a perspective view of the carrier of FIG. 13 with the bottom cover removed. FIG. 15A is a perspective view of a carrier and securing strap assembly according to a third embodiment of the present disclosure with the bottom cover removed. FIG. 15B is a partial cross-sectional view taken along line K-K in FIG. 15A. FIG. 15C is a partial cross-sectional view taken along line N-N in FIG. 15A. FIG. 16 is a perspective view of the carrier of FIG. 15A in another state with the securing strap assembly stowed. FIG. 17 is a top perspective view of a carrier according to a fourth embodiment of the present disclosure. FIG. 18 is a top perspective view of the carrier of FIG. 17. FIG. 19A is a perspective view of a securing strap retention structure of FIG. 17. FIG. 19B is a bottom view of the securing strap retention structure of FIG. 19A. FIG. 20 is a perspective view of the carrier of FIG. 17 secured to a vehicle seat. FIG. 21 is a rear view of a carrier according to a fifth embodiment of the present disclosure. FIG. 22 is a perspective view of a carrier secured to a vehicle seat by a connecting securing device according to an embodiment of the present disclosure. FIG. 23 is a perspective view of a connecting securing device according to an embodiment of the present disclosure. FIG. 24 is a perspective view of a carrier provided with a connecting securing device according to an embodiment of the present disclosure with a bottom cover of the carrier removed. FIG. 25 is a perspective view of a bottom support provided with a connecting securing device according to an embodiment of the present disclosure. FIGS. 26A and 26B are partial perspective views of a second strap connection assembly of a connecting securing device connected to a bottom support and partial structural perspective views of the second strap connection assembly according to another embodiment of the present disclosure. FIGS. 27A-27D are partial structural perspective views of a second strap connection assembly according to the present disclosure. FIG. 28 illustrates a perspective view of a carrier secured to a vehicle seat according to an embodiment of the present disclosure. FIGS. 29 and 30 illustrate top perspective views of a carrier according to an embodiment of the present disclosure in different states of use.FIG. 31A shows a bottom view of the carrier shown in FIG. 29. FIG. 31B shows a partial cross-sectional view of portion A shown in FIG. 31A. FIG. 32A shows a bottom view of the carrier shown in FIG. 30. FIG. 32B shows a partial cross-sectional view of portion B shown in FIG. 32A. FIG. 33A shows a bottom view of the carrier of the present disclosure in a stowed condition. FIG. 33B shows a partial cross-sectional view of portion C shown in FIG. 33A. FIG. 34 shows another bottom view of the carrier shown in FIG. 33A. FIGS. 35-37 show bottom perspective views of the carrier of another embodiment of the present disclosure in different use conditions, respectively. FIG. 38 shows a perspective bottom view of the carrier shown in FIG. 37 in a stowed condition. FIG. 39A shows a partial enlarged view of portion E shown in FIG. 38. FIG. 39B shows a partial cross-sectional view taken along line F-F in FIG. 39A. FIG. 40 shows another perspective bottom view of the carrier shown in FIG. 38 with a bottom cover removed. FIG. 41A shows yet another perspective bottom view of the carrier of another embodiment of the present disclosure with a bottom cover removed. FIG. 41B shows a partial cross-sectional view taken along line G-G in FIG. 41A. Reference numeral description: carrier 2100 body 2110 window 2111 bottom support 2120 first stowage slot 2121 second stowage slot 2122 support leg 2123 fixed column 21231 fixed hole 21232 non-slip pad 21233 reinforcing bracket 2124 first reinforcing rod 21241 second reinforcing rod 21242 first section 21242a second section 21242b extension section 21242c bracket stowage slot 2125 first limiting structure 2126 first limiting rod 21261 first seat body 21262 first portion 21262a second portion 21262b first mounting hole 21263 second limiting structure 2127 second limiting rod 21271 second seat body 21272 first portion 21272a second portion 21272b second mounting hole 21273 body cover 2130 bottom cover 2140 first stowage cover 2141 second stowage cover 2142 anti-collision structure 2200 fixed strap assembly 2300 first strap assembly 2310 first strap 2311 second strap 2312 first connection end 2313 second connection end 2314 length adjuster 2315 first connection device 23131 second strap assembly 2320 third strap 2321 thirdconnecting end 2322 fourth connecting end 2323 second connecting device 23231 vehicle seat 2600 carrier 3100, 4100, 5100, 6100 box body 3110 side support 6111 first window 6116A, 6116B bottom support 3120, 4120, 5120 first receiving groove 3121 second receiving groove 3122 support leg 3123, 4123 reinforcing rod 3124, 5124 bracket receiving groove 3125 fixing belt limiting structure 3126, 4126, 5126 first tubular structure 31261, 41261, 51261 second tubular structure 31262, 41261, 51262 first end 51262a Qiyanshengyi 51262b convex rib 41263 threaded gap 31264, 41264 fastener 3128, 4128 body cover 3130 bottom cover 3140 first receiving cover 3141 second receiving cover 3142 fixing belt assembly 3300, 4300, 5300 first belt assembly 3310, 4310 first belt 3311 second belt 3312, 5312 first connecting end 3313 second connecting end 3314 length adjuster 3315 first connecting device 33131 second belt assembly 3320 third belt 3321, 4321, 5321 third connecting end 3322 fourth connecting end 3323 second connecting device 33231 vehicle seat 3600, 5600 carrier M100 box body M110 bottom support M120 reinforcing rod M124 belt limiting structure M126 connecting fixing device M300 first belt connecting assembly M301 first belt structure M310 first belt body M311 first end M312 second end M313 first length adjuster M314 second belt structure M320 second belt body M321 first end M322 second end M323 second length adjuster M324 second belt connecting assembly M302 third belt body M331 first end M332 second end M333 buffer belt M334 first stitching point MX1 second stitching point MX2 knot point MCI, MC2 carrier N1 box N100 body cover N101 bottom cover N102 receiving cover N1021 box body N110 bottom support N120 assembly receiving groove N121 fixing belt receiving grooveN122

[0002] ISOFIX connection assembly N200 engagement portion N210 connection portion N220 slide N221 wear-resistant member N2210 synchronization member N222 connection member N223 mounting portion N230 first locking portion N231 second locking portion N232 third locking portion N233 locking device N240 lock release operation member N241 locking member N242 reset member N243 mounting seat N244 upper cover N2441 lower cover N2442 reinforcing bracket N300 first reinforcing rod N310 second reinforcing rod N320 extension section N321 belt fixing structure N330 fixing seat N331 fixing pin N332 position-limiting member N340 fixing belt assembly N500 first connection end N501 second connection end N502 first belt N510 second belt N520 length adjuster N530 vehicle seat N600 carrier N1A box body N100A body cover N101A bottom cover N102A storage cover N1021A box body N110A bottom support N120A assembly storage groove N121A fixing belt storage groove N122A support leg N123A

[0003] ISOFIX connection assembly N200A engaging portion N210A connecting portion N220A sliding member N221A synchronization member N222A connecting member N223A mounting portion N230A locking device N400A connection seat N410A upper surface N411A mounting hole N412A locking member N420A fixing strap assembly N500A first connection end N501A second connection end N502A first strap N510A second strap N520A length adjuster N530A Specific embodiments In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thorough and comprehensive. Below, a first group of embodiments for fixing a carrier to a vehicle seat will be described. Referring to FIG. 1, the first embodiment of the present disclosure provides a carrier 2100 and a fixing strap assembly 2300 for the carrier 2100. The carrier 2100 can be fixed to a vehicle seat 2600 by the fixing strap assembly 2300. As shown in FIG. 1, the fixing strap assembly 2300 of the present embodiment is configured to be connected with the carrier 2100. Alternatively, the fixing strap assembly 2300 is at least partially fixed (for example, by a detachable or non-detachable manner) to the carrier 2100. At least a part of the fixing strap assembly 2300 can be accommodated in an accommodation space of the carrier 2100, and the position and structure of the accommodation space will be described in detail below in conjunction with FIG. 2. Specifically, the carrier 2100 includes a box body 2110 and a bottom support 2120. The bottom support 2120 is detachably connected to the box body 2110 to form a box with the box body 2110, providing a space for accommodating pets or children. The outside of the box is covered with a cover, which can include at least one of cloth, plastic, PE, and the present disclosure is not limited thereto. Specifically, the cover can include a body cover 2130 covering the outside of the box body 2110, and a bottom cover 2140 covering the outside of the bottom support 2120. The body cover 2130 and the bottom cover 2140 are detachably connected, for example, by a chain structure, a magic tape, a hook and loop assembly, etc., and the present disclosure is not limited thereto.Further, as shown in FIG. 1, the carrier 2100 can also be provided with a crash structure 2200 to reduce the impact received by the carrier 2100. The crash structure 2200 can be fixedly provided on the outside of the body cover 2130, for example, by sewing, pasting, or the like. Specifically, the crash structure 2200 is provided at least on the side close to the vehicle door when the carrier 2100 is placed on the vehicle seat 2600. FIG. 2 shows another perspective view of the carrier 2100 and the fixing belt assembly 2300 shown in FIG. 1, in which the carrier 2100 removes the bottom cover 2140 to more clearly show the structure of the bottom support 2120; FIG. 3 and FIG. 4 respectively show a perspective view of the fixing belt assembly 2300 and the carrier 2100 shown in FIG. 2. As shown in FIG. 2, the fixing belt assembly 2300 of the present embodiment can be connected with the carrier 2100, for example, fixedly connected. More specifically, the fixing belt assembly 2300 can be fixed to the carrier 2100 detachably or non-detachably, so that only a part of the fixing belt assembly 2300 is always connected with the carrier 2100, that is, the fixing belt assembly 2300 does not need to be repeatedly installed or disassembled. For example, when the carrier 2100 and the fixing belt assembly 2300 are in a state of use, the fixing belt assembly 2300 extends from the side of the carrier 2100 away from the back of the vehicle seat through the bottom side of the bottom support 2120, and the two ends are connected at different positions of the vehicle seat, so as to stably and firmly fix the carrier 2100 to the vehicle seat. As shown in FIG. 3, the fixing belt assembly 2300 can include a first belt assembly 2310 and two second belt assemblies 2320. The first belt assembly 2310 includes a first belt 2311, a second belt 2312, a first connecting end 2313, and a second connecting end 2314, wherein the first belt 2311 and the second belt 2312 can be collectively referred to as a "first belt body". One end of the first belt 2311 constitutes the first connecting end 2313 of the first belt assembly 2310, and is provided with a first connecting device 23131 at the first connecting end 2313. In an example, the first connecting device 23131 can be a Top Tether (top tether) connector, and is connected to the back of the vehicle seat or other relevant connecting position of the vehicle above the vehicle seat. The other end of the first belt 2311 can be connected with one end of the second belt 2312. The other end of the second belt 2312 constitutes the second connecting end 2314 of the first belt assembly 2310, and is connected to the second belt assembly 2320.In one example, a length adjuster 2315 can be provided between the first strap 2311 and the second strap 2312 to adjust the overall length of the first strap assembly 2310. The length adjuster 2315 can be configured to adjust the length of the first strap 2311, or to adjust the length of the second strap 2312, or to adjust the length of both the first strap 2311 and the second strap 2312, and the present disclosure is not limited in this regard. In one example, the second strap 2312 can be formed of two strap bodies, each end of the two strap bodies being connected to each other, and each other end being connected to a second strap assembly 2320, respectively. In other examples, the second strap 2312 can be formed of one strap body, the strap body passing through the length adjuster 2315, and each end forming a second connection end 2314. Each second strap assembly 2320 includes a third strap 2321 (also referred to as a “second strap body”), a third connection end 2322, and a fourth connection end 2323. The third strap 2321 is located between the third connection end 2322 and the fourth connection end 2323. The third connection end 2322 of the second strap assembly 2320 is connected to the second connection end 2314 of the first strap assembly 2310. The fourth connection end 2323 of the second strap assembly 2320 is provided with a second connection device 23231. In one example, the second connection device 23231 can be a LATCH connector that cooperates with a corresponding connection structure provided on a vehicle seat to secure the carrier 2100 to the vehicle seat. In combination with reference to FIGS. 1, 2, and 3, at least a portion of the first strap assembly 2310 (e.g., the second strap 2312) passes from a side of the carrier 2100 away from the backrest of the vehicle seat 2600 to a bottom portion of the carrier 2100, and the first connection device 23131 is connected to a top portion of the vehicle seat 2600. The second strap assembly 2320 is provided at the bottom portion of the carrier 2100, one end (i.e., the third connection end 2322) of the second strap assembly 2320 is connected to one end (i.e., the second connection end 2314) of the first strap assembly 2310, and the other end of the second strap assembly 2320 is provided with the second connection device 23231, and the second connection device 23231 is connected to the vehicle seat 2600 to secure the carrier 2100 to the vehicle seat 2600. Optionally, the first strap assembly 2310 and the second strap assembly 2320 are fixedly connected to each other, i.e., the second strap 2312 and the third strap 2321 are fixedly connected.Further, the second strap 2312 of the first strap assembly 2310 is in one-piece structure with the third strap 2321 of the second strap assembly 2320, i.e., the third connection end 2322 and the second connection end 2314 are the same end point. As shown in FIG. 2, the receiving space for receiving the securing strap assembly 2300 is located on the bottom support 2120. Specifically, the receiving space includes a first receiving slot 2121 and a second receiving slot 2122 provided on the bottom support 2120, the first receiving slot 2121 is configured to receive the second connection device 23231 and optionally receive at least a portion of the second strap assembly 2320, and the second receiving slot 2122 is configured to receive the first connection device 23131 and optionally receive at least a portion of the first strap assembly 2310. In an example, the first receiving slot 2121 and the second receiving slot 2122 are respectively provided on opposite sides of the bottom support 2120 along the transverse axis D4 (i.e., the width direction thereof). For example, the first receiving slot 2121 is provided on a side from which the second connection device 23231 (e.g., a LATCH connector) extends out of the carrier 2100, i.e., a side close to the backrest of the vehicle seat in the present embodiment, for receiving the second connection device 23231 and at least a portion of the third strap 2321. In the present embodiment, two first receiving slots 2121 can be provided, each of which is for receiving one second connection device 23231. Alternatively, the two first receiving slots 2121 can be symmetrically provided with respect to the center of one side of the bottom support 2120. Further, the two first receiving slots 2121 can be provided in the middle of the side. In other examples, only one receiving slot 2121 can be provided, e.g., in the middle of one side of the bottom support 2120, for receiving two second connection devices 23231. The second receiving slot 2322 can be provided on the opposite side of the first receiving slot 2121, i.e., a side away from the backrest of the vehicle seat, for receiving the first strap 2311 of the first strap assembly 2310, at least a portion of the second strap 2312, and the first connection device 23131. Alternatively, the second receiving slot 2122 can be centrally provided on one side of the bottom support 2120 (i.e., provided in the middle of the side).In an example, the first receiving groove 2121 and the second receiving groove 2122 can be recessed structures and are configured to be disposed at the bottom of the bottom support 2120, in particular, at the bottom of the bottom support 2120 near the edge. As shown in FIG. 2, when at least a portion of the second belt assembly 2320 and the first belt assembly 2310 are received in the first receiving groove 2121 and the second receiving groove 2122, respectively, by disposing such recessed structures, the received securement belt assembly 2300 will not protrude from the bottom support 2120, thereby not interfering with the contact of the bottom of the carrier 2100 with the support surface (e.g., the vehicle seat 2600, the vehicle floor, or the ground, etc.). In combination with FIGS. 2 and 4, the bottom support 2120 can also be provided with securement belt limiting structures for limiting the displacement (i.e., positioning) of the securement belt assembly 2300, such that the securement belt assembly 2300 is at least partially fixedly connected to the carrier 2100 and will not accidentally come off or scatter around, and the carrier 2100 can be conveniently and quickly secured when the securement belt assembly 2300 is removed. As shown in FIG. 4, the securement belt limiting structures include a first limiting structure 2126 and a second limiting structure 2127. The first limiting structure 2126 is configured to limit the second belt assembly 2320 from accidentally coming off the bottom support 2120. Optionally, the first limiting structure 2126 can be disposed near the fourth connection end 2323 of the second belt assembly 2320, i.e., near the side of the backrest of the vehicle seat, i.e., near the side of the second connection device 2323 extending out of the carrier 2100, so as to avoid the case that the limiting structure is far away from the fourth connection end 2323 of the securement belt assembly 2300, which can cause a large swing range of the second connection device 2323, which is not easy to receive and can cause unnecessary collision or damage. Optionally, the first limiting structure 2126 can be disposed near the first receiving groove 2121 to facilitate the receiving and removing of the second connection device 2323 and only need to receive the third belt 2321 near the second connection device 2323, which helps to save receiving space and facilitate operation. The number of the first limiting structure 2126 can be proportional to the number of the third belt 2321 (or the fourth connection end 2323 thereof).For example, in the present embodiment, two first limiting structures 2126 can be provided, corresponding to one of the second connecting devices 23231 and the third belt 2321 connected thereto, respectively, to limit the same. In an example, as shown in FIG. 2, the first limiting structure 2126 can be arranged on both sides of the first receiving groove 2121, i.e., the first receiving groove 2121 is located between the two first limiting structures 2126, so as to facilitate the accommodation of the second connecting device 23231 and avoid interference. However, the present disclosure is not limited thereto, and in other embodiments, one first limiting structure 2126 can be provided to limit two third belts 2321, or a plurality of first limiting structures 2126 can be provided to limit one third belt 2321 at multiple points. In the present embodiment, the second limiting structure 2127 is configured to limit the first belt assembly 2310, so as to prevent the first belt assembly 2310 from swinging relative to the carrier 2100 and slipping out from the outside of the carrier 2100. Alternatively, the second limiting structure 2127 can be arranged close to the connecting point of the first belt assembly 2310 and the second belt assembly 2320, or close to the second connecting end 2314, i.e., on the side of the bottom support 2120 away from the backrest of the vehicle seat. Since the second connecting end 2314 of the first belt assembly 2310 and the third connecting end 2322 of the second belt assembly 2320 are fixedly connected to each other, the second limiting structure 2127 can further limit the first belt assembly 2310, so as to further ensure the stability and firmness of the fixed belt assembly 2300. Alternatively, as shown in FIG. 2, two second limiting structures 2127 can be provided. The two second limiting structures 2127 can be arranged on both sides of the second receiving groove 2122, so as to facilitate the accommodation of the first belt assembly 2310 and the first connecting device 23131, while avoiding interference and facilitating accommodation. The number of second limiting structures 2127 can be proportional to the number of third belts 2321 (or fourth connecting ends 2323) and / or second belts 2312 (or second connecting ends 2314), but the present disclosure is not limited thereto, and in other embodiments, one second limiting structure 2127 can be provided to limit two third belts 2321 and second belts 2314, or a plurality of second limiting structures 2127 can be provided to limit one third belt 2321 and one second belt 2314 at multiple points.As can be seen from FIG. 2, when the fixing belt assembly 2300 of the carrier 2100 is in a use state, the two ends of the two second belt assemblies 2320 are respectively limited and kept in a state of extending from the bottom side of the bottom support 2120 by the first limiting structure 2126 and the second limiting structure 2127, and the two second connecting ends 2314 of the first belt assembly 2310 are respectively limited by the second limiting structure 2127 to prevent the first belt assembly 2310 from deviating or disengaging. When the carrier 2100 is not used or it is not necessary to fix the carrier 2100 to the vehicle seat by the fixing belt assembly 2300, the second connecting device 23231 can be separated from the vehicle seat and stored in the first storage groove 2121, and the first connecting device 23131 located above is detached from the vehicle seat or the relevant connection position of the vehicle, and the first belt 2311 and the second belt 2312 of the first belt assembly 2310 are stored in the second storage cover 2122 to achieve storage. Further referring to FIGS. 4, 5A and 5C, the bottom support 2120 is further provided with a reinforcing support 2124 to enhance the structural stability of the bottom support 2120 and the carrier 2100. The specific structure of the reinforcing support 2124 will be described below in combination with FIG. 6. The reinforcing support 2124 can be arranged on the bottom side of the bottom support 2120, for example, in the support storage groove 2125 recessed from the bottom side of the bottom support 2120. Optionally, the support storage groove 2125 is arranged between the first storage groove 2121 and the second storage groove 2122, and has a shape suitable for the reinforcing support 2124 to avoid interference with other components of the carrier 2100 when the reinforcing support 2124 is arranged in the bottom support 2120. In addition, referring to FIGS. 5A and 5B, FIG. 5A is a top view of the bottom support 2120, and FIG. 5B is a bottom view of the bottom support 2120. The bottom side of the bottom support 2120 can also be provided with two support feet 2123 arranged on both sides of the bottom support 2120 along the longitudinal axis direction D3.In an example, each support leg 2123 can be a plate-shaped piece in a long strip shape, and both ends have fixing posts 21231 connected with fixing holes 21232 provided at corresponding positions of the bottom support piece 2120, for example, by fasteners such as screws passing through the fixing holes 21232 and the fixing posts 21231 in sequence to fixedly connect the two together, but the present disclosure is not limited thereto, and the support leg 2123 can also be fixedly provided on the bottom support piece 2120 by adhesion or the like. In addition, the support leg 2123 can also be provided with anti-skid pads 21233 to increase the friction of the device 2100 relative to the vehicle seat. For example, the anti-skid pads 21233 can be provided at the fasteners connecting the fixing holes 21232 and the fixing posts 21231 to prevent the fasteners from accidentally scratching the vehicle seat or the like. As shown in FIGS. 4 and 6, the reinforcing bracket 2124 includes a first reinforcing rod 21241 and a second reinforcing rod 21242. The first reinforcing rod 21241 extends along the longitudinal axis direction D3 of the bottom support piece 2120. In an example, two first reinforcing rods 21241 are provided, which are substantially parallel to each other. The second reinforcing rod 21242 is configured to be provided at an angle to the first reinforcing rod 21241. In an example, the second reinforcing rod 21242 can be connected between the two first reinforcing rods 21241 and spaced apart from each other, and respectively at an angle to the two first reinforcing rods 21241. The second reinforcing rod 21242 can extend along the transverse axis direction D4 of the bottom support piece 2120. In another example, two first reinforcing rods 21241 and two second reinforcing rods 21242 are provided, the two first reinforcing rods 21241 are substantially parallel to each other, and the two second reinforcing rods 21242 are respectively provided between the two first reinforcing rods 21241 to form a ring-shaped structure with the two first reinforcing rods 21241, so as to increase the structural stability and improve the overall structural strength. Through such a structure, the first reinforcing rod 21241 and the second reinforcing rod 21242 can increase the fixing stability of each other, so that both (or the entire reinforcing bracket 2124) are kept in the receiving space of the bottom support piece 2120 and will not slide due to the sliding of the fixing belt assembly 2300.In the embodiment, as shown in FIG. 4, one end of each of the two second reinforcing rods 21242 is connected to two ends of one first reinforcing rod 21241, and the other end of each of the two second reinforcing rods 21242 extends from the connection with the other first reinforcing rod 21241 (i.e. from the position connected to the first reinforcing rod 21241 close to the other end), that is, the other end of the second reinforcing rod 21242 is not connected to the first reinforcing rod 21241 at the end, but leaves an extension segment 21242c at the end. In an example, as shown in FIG. 4 and FIG. 6, the second reinforcing rod 21242 can have a non-linear structure, for example, an arc-shaped curve, wherein the extension segment 21242c can be curved to match the arc-shaped structure of the side (close to the edge) of the bottom support 2120, so that the second limiting structure 2127 arranged at the extension segment 21242c is closer to, or even abuts against, the side of the bottom support 2120, thereby making the overall structure of the bottom support 2120 and the limiting of the fixed belt assembly more stable. In addition, the segments (such as the first segment 21242a and the second segment 21242b) of the second reinforcing rod 21242 close to the bottom surface of the bottom support 2120 have a non-linear structure, for example, the structure shown in FIG. 4, that is, the first segment 21242a of the second reinforcing rod 21242 extends linearly along the horizontal axis direction D4, and the second segment 21242b is slightly inclined relative to the horizontal axis direction D4, for example, the second segments 21242b of the two second reinforcing rods 21242 are inclined towards the direction close to each other. Optionally, at least one of the first segment 21242a and the second segment 21242b of the second reinforcing rod 21242 can have an arc-shaped structure. For a larger volume carrier, as shown in FIG. 2, due to the fixed position of the ISOFIX interface, in order to make the area of the second belt arranged around the carrier larger and make the carrier more stable, through such a non-linear structure, the distance between the two second limiting structures 2127 can be greater than the distance between the two first limiting structures 2126, so that the carrier is more firmly fixed. At the same time, the first limiting structure 2126 can also be closer to the ISOFIX interface, thereby dispersing the stress of the bottom support 2120 and improving the fixing stability. For a smaller volume carrier, the distance between the two first limiting structures 2126 can also be equal to the distance between the two second limiting structures 2127, and the present disclosure is not limited thereto.Further in combination with FIG. 2, FIG. 4 and FIG. 7A-7C, the first limiting structure 2126 for limiting the first strap assembly 2310 can be disposed at the connection of the first reinforcing rod 21241 and one end of the second reinforcing rod 21242. The second limiting structure 2127 is disposed at the end (i.e., the extension 21242c) of the other end of the second reinforcing rod 21242, so as to be closer to the edge of the bottom support 2120, thereby better limiting the function of the fixed strap assembly 2300. In an example, as shown in FIG. 2, FIG. 4 and FIG. 7A, the first limiting structure 2126 can include a first limiting rod 21261 and a first body 21262. The first body 21262 is fixedly disposed on the reinforcing bracket 2124, for example, on the first reinforcing rod 21241 and / or the second reinforcing rod 21242. The first limiting rod 21261 is disposed on the first body 21262 through the first fixing hole 21263 formed on the first body 21262, and is kept a certain distance from the bottom surface of the first body 21262, so that the fixed strap assembly 2300 (e.g., the third strap 2321, see FIG. 2) passes between the first body 21262 and the first limiting rod 21261, so as to fix the fixed strap assembly 2300 on the bottom of the carrier. In an example, the first body 21262 has a first part 21262a and a second part 21262b connected to each other. The first part 21262a is connected with the first reinforcing rod 21241 and / or the second reinforcing rod 21242, and is optionally sleeved on the first reinforcing rod 21241 and / or the second reinforcing rod 21242. The second part 21262b has an opening on one side thereof, which faces away from the first part 21262a, more specifically, faces the ISOFIX interface, so that the third strap extends out to be connected with the ISOFIX interface. Optionally, the second part 21262b can be provided with a first recess, in which the first limiting rod 21261 is disposed. An opening is formed on the side of the first recess close to the ISOFIX interface, but the present disclosure is not limited thereto. The other side of the second part 21262b is connected with the first part 21262a. Specifically, the first fixing hole 21263 is formed in the second part 21262b, for example, on the sidewall of the second part 21262b, so that the first limiting rod 21261 is connected in the second part 21262b of the first body 21262.In other examples, the first portion 21262a and the second portion 21262b can be a one-piece structure. In an example, as shown in FIGS. 2, 4, 7B and 7C, the second seat 21272 is fixedly disposed on the reinforcing bracket 2124, for example, at the other end of the second reinforcing rod 21242 (i.e., the end not having the second seat 21272 disposed thereon), specifically at the distal end of the other end, i.e., the extension 21242co. Optionally, the second seat 21272 is disposed proximate to the side edge of the bottom support 2120. The second limiting rod 21271 is disposed on the second seat 21272 through the second mounting hole 21273 formed on the second seat 21272, and is kept at a distance from the bottom surface of the second seat 21272, such that the securing belt assembly 2300 (e.g., the third belt 2321 and / or the second belt 2312, see FIG. 2) passes between the second seat 21272 and the second limiting rod 21271 to secure the securing belt assembly 2300 to the bottom of the carrier. In an example, the second seat 21272 can have a box-like structure. The second limiting rod 21271 is disposed in the box-like structure (i.e., the receiving space) of the second seat 21272 for the securing belt assembly (the second belt and / or the third belt) to pass between the second limiting rod 21271 and the inner surface of the second seat 21272. One side of the upper end of the second seat 21272 can have a bevel 21272a extending outwardly from the receiving space of the box-like structure, so that the second belt and / or the third belt extend out of the receiving space to be disposed around the outside of the carrier. Optionally, the other side of the upper end of the second seat 21272 is provided with a rim portion 21272b extending outwardly by a distance, so as to be more securely fixed to the bottom support 2120. The present disclosure is not limited to the above structure, and in other examples, the second seat 21272 can also be provided in a bump structure, etc.In addition, in other embodiments, the first and second limiting structures 2126 and 2127 can also be directly provided on the bottom support 2120, i.e., the bottom support 2120 can not be provided with the reinforcing support 2124 and the support receiving slot 2125. At this time, the bottom of the bottom support 2120 can be provided with a plurality of recess and convex rib structures, or a honeycomb structure, etc., so as to increase the strength of the fixing belt limiting structure or the bottom support 2120, optimize the stress distribution of the bottom of the bottom support 2120, and help the lightweight design of the bottom support 2120, etc. FIGS. 8 and 9 respectively show perspective views of the carrier 2100 shown in FIG. 1 in different states, i.e., FIG. 8 shows a perspective view of the fixing belt assembly in a use state, and FIG. 9 shows a perspective view of the fixing belt assembly in a receiving state (i.e., being received). In the present embodiment, the bottom cover 2140 can be provided with openable and closable receiving covers corresponding to the receiving spaces (i.e., the first and second receiving slots 2121 and 2122 shown in FIG. 2) for receiving the fixing belt assembly. Referring to FIGS. 8 and 9, the receiving covers can include first and second receiving covers 2141 and 2142. The first receiving cover 2141 is configured to shield the receiving space for receiving, for example, the LATCH assembly (such as the second connecting device 23231 shown in the figure), i.e., is configured to shield the first receiving slot 2121. Specifically, the first receiving slot 2121 can be provided corresponding to the first receiving cover 2141, so as to facilitate the taking out or retracting of the second connecting device 23231. Specifically, the second receiving slot 2122 can be provided corresponding to the second receiving cover 2142, so as to facilitate the taking out or retracting of the first belt assembly 2310. In an example, the first receiving cover 2141 can be provided on one side of the carrier 2100 along the transverse axis D4, e.g., the side close to the backrest of the vehicle seat 2600. Optionally, as shown in FIG. 9, two first receiving covers 2141 can be provided, corresponding to one first receiving slot 2121 respectively. Alternatively, one first receiving cover can also be provided, covering two first receiving slots 2121 at the same time (see the structure shown in FIG. 11).The second storage cover 2142 is configured to cover the storage space for storing, for example, the Top Tether assembly (may be combined with FIG. 8, which shows a portion of the first belt assembly 2310), i.e., the second storage slot 2122o is configured to cover. In an example, the second storage cover 2142 can be provided on the other side of the carrier 2100 along the horizontal axis direction D4, for example, away from the side of the backrest of the vehicle seat 2600. The first storage cover 2141 and the second storage cover 2142 can be at least partially detachably or separably connected to other parts of the bottom cover 2140, for example, by a zipper structure, Velcro, magnetic buckle, elastic collar, etc. In an example, the bottom cover 2140, the first storage cover 2141, and the second storage cover 2142 can each include at least one of cloth, plastic, PE. For example, the bottom cover 2140 and the first storage cover 2141 and the second storage cover 2142 provided thereon can be a one-piece structure and are generally composed of cloth, and a PE plate is fixedly provided (such as sewn) in the cloth, so that a part of it forms a relatively hard structure, thereby avoiding that the cloth is too soft and prone to collapse, etc. More specifically, the first storage cover 2141 and / or the second storage cover 2142 can be fixed with a PE plate to form a cover with a hard structure, thereby facilitating opening and closing. Alternatively, the first storage cover 2141 and / or the second storage cover 2142 can have an openable or closable opening for a part of the first belt assembly and / or the second belt assembly to extend out, so as to fix the carrier to the vehicle seat. In an example, the first storage cover 2141 and / or the second storage cover 2142 can be in a one-piece structure with the bottom support 2140, and the opening can be detachably connected with the bottom cover 2140 by a zipper structure, Velcro, magnetic buckle, elastic collar, etc. to store the fixing belt assembly 2300 in the first storage slot and / or the second storage slot, and when the opening is closed, it can achieve aesthetics. The storage method of the fixing belt assembly 2300 will be described below in combination with the foregoing FIG. 2 and FIG. 8 and FIG. 9.Referring to FIGS. 2 and 8, when it is necessary to connect the carrier to the vehicle seat, the second belt assembly 2320 of the securing belt assembly 2300 is taken out of the first receiving slot 2121, and the first belt assembly 2310 is taken out of the second receiving slot 2122, at which time the second connecting device 23231 is extended from the first receiving slot 2121 to connect with the ISOFIX interface on the vehicle seat, while the first belt assembly 2310 is wrapped from the outside of the carrier to the top of the carrier, and the first connecting device is connected to the top of the vehicle seat. When the carrier 2100 is not used or it is not necessary to secure the carrier 2100 to the vehicle seat with the securing belt assembly 2300, the second connecting device 23231 (see FIG. 2) can be separated from the vehicle seat and stored in the first receiving slot 2121, and the first connecting device 23131 on the top is detached from the vehicle seat or the vehicle-related connecting position, and the first belt 2311 and the second belt 2312 of the first belt assembly 2310 are stored in the second receiving cover 2122, and then the first receiving cover 2141 and the second receiving cover 2142 are closed, respectively, to complete the storage state. Please refer to FIG. 9. It should be noted that in the present embodiment, the securing belt assembly can be fixed in the bottom support 2120 by the securing belt limiting structure, but the present disclosure is not limited thereto. In other embodiments, the securing belt assembly can also be detachably connected with the securing belt limiting structure or other limiting structures provided on the bottom support 2120. Referring to FIGS. 10 and 11, the second embodiment of the present disclosure provides a carrier 3100 and a securing belt assembly 3300 for securing the carrier 3100 to a vehicle seat 3600. Specifically, FIG. 10 shows a perspective view of the carrier 3100 secured to the vehicle seat 3600 (i.e., the carrier 3100 and the securing belt assembly 3300 are in the use state), and FIG. 11 shows the carrier 3100 and the securing belt assembly 3300 in the use state as viewed from the bottom of the carrier 3100. As shown in FIGS. 10 and 11, similar to the first embodiment described above, the securing belt assembly of the present embodiment is configured to be at least partially connected with the carrier 3100. Wherein, the carrier 3100 can include a box body 3110 and a bottom support 3120. The bottom support 3120 is detachably connected with the box body 3110 to form a box with the box body 3110, providing a space for accommodating pets or children.The body cover 3130 and the bottom cover 3140 can be made of at least one of cloth, plastic, and PE, but the present disclosure is not limited thereto. In addition, the body cover 3130 and the bottom cover 3140 can be made of the same material or a combination of materials, or different materials or a combination of materials. In an example, the body cover 3130 and the bottom cover 3140 are detachably connected to each other, for example, by a pull chain structure, a magic tape, a hook and loop assembly, etc., but the present disclosure is not limited thereto. Further, FIG. 12A shows another perspective view of the carrier 3100 shown in FIG. 11 and the fixing belt assembly 3300 connected to the carrier 3100, in which the bottom cover 3140 of the carrier 3100 is removed. FIG. 12B shows a partial cross-sectional view taken along line H-H in FIG. 12A, and FIG. 12C shows a partial cross-sectional view taken along line J-J in FIG. 12A, to show the structure and connection of the fixing belt limiting structure 3126, which will be described later. Similar to the first embodiment described above, the fixing belt assembly 3300 of the second embodiment of the present aspect can be connected to the carrier 3100, and optionally, a part of the fixing belt assembly 3300 can be fixedly connected to the carrier 3100 in a detachable or non-detachable manner, so that whether or not the fixing belt assembly 3300 is used, the part of the fixing belt assembly 3300 can always be connected to the carrier 3100, so that it is not necessary to repeatedly install or remove the fixing belt assembly 3300, and at the same time, it is convenient to unfold the fixing belt assembly 3300 to quickly fix the carrier 3100. Specifically, as shown in FIGS. 10 and 12A, the fixing belt assembly 3300 of the present embodiment has a similar structure to the fixing belt assembly 2300 in the first embodiment described above, that is, the fixing belt assembly 3300 can include a first belt assembly 3310 and a second belt assembly 3320. The first belt assembly 3310 includes a belt body composed of a first belt 3311 and a second belt 3312, and a first connection end 3313 and a second connection end 3314.The one end of the first belt 3311 constitutes a first connection end 3313 of the first belt assembly 3310, and is provided with a first connection device 33131, such as a Top Tether connector, for connecting with a top anchor point on the vehicle seat or a corresponding anchor point above the vehicle seat. The other end of the first belt 3311 can be connected with one end of a second belt 3312, and the other end of the second belt 3312 constitutes a second connection end 3314 of the first belt assembly 3310, and is connected to a second belt assembly 3320 at the second connection end 3314. Further, the fixed belt assembly 3300 in the embodiment can include two second belt assemblies 3320. Each second belt assembly 3320 can include a third connection end 3322, a fourth connection end 3323, and a third belt 3321 (i.e., a second belt body) located between the third connection end 3322 and the fourth connection end 3323. The third connection end 3322 of the second belt assembly 3320 is connected with the second connection end 3314 of the first belt assembly 3310, and the fourth connection end 3323 is provided with a second connection device 33231, such as a LATCH connector, for engaging with a corresponding connection structure provided on the vehicle seat 3600. Alternatively, the first belt assembly 3310 and the second belt assembly 3320 are fixedly connected with each other, i.e., the third connection end 3322 and the second connection end 3314 are fixedly connected. Alternatively, the second belt 3312 of the first belt assembly 3310 and the third belt 3321 of the second belt assembly 3320 are an integral structure, i.e., the third connection end 3322 and the second connection end 3314 are the same end point. In addition, the specific structure and components of the first belt assembly 3310 in the embodiment can be similar to those of the first belt assembly 2310 in the first embodiment described above, such as having a length adjuster and a specific structure similar to the second belt 2312, and specific reference can be made to FIG. 3 and the related content thereof, which will not be repeated here. Similarly, the second belt assembly 3320 in the embodiment can also have a structure similar to the second belt assembly 2320 in the first embodiment described above, and specific reference can be made to FIG. 3 and the related content thereof, which will not be repeated here.With reference to FIGS. 10-12A, when the carrier 3100 and the fixed strap assembly 3300 are in a use state, the fixed strap assembly 3300 extends from a side of the carrier 3100 away from the backrest of the vehicle seat 3600, passes the bottom side of the bottom support 3120, and is connected at two ends at different positions of the vehicle seat 3600, so as to stably and firmly fix the carrier 3100 to the vehicle seat 3600o More specifically, as shown in FIG. 10, the first connecting end 3313 of the first strap assembly 3310 can be connected to a corresponding anchor point on or above the top of the vehicle seat 3600 by the first connecting device 33131, and at least a portion of the first strap assembly 3310 (e.g., the second strap 3312 and optionally a portion of the first strap 3311) winds from a side of the carrier 3100 away from the backrest of the vehicle seat 3600 to or near the bottom of the carrier 3100. Further with reference to FIGS. 10 and 12A, the second connecting end 3314 of the first strap assembly 3310 is connected to or formed integrally with (i.e., same end point) the third connecting end 3322 of the second strap assembly 3320, and the fourth connecting end 3323 of the second strap assembly 3320 is connected to the vehicle seat 3600 from the bottom side of the bottom support 3120 by the second connecting device 33231o In addition, the bottom support 3120 can be provided with a storage space for accommodating the fixed strap assembly 3300. As shown in FIG. 12A, the storage space includes a first storage slot 3121 and a second storage slot 3122o The first storage slot 3121 is configured to accommodate the second connecting device 33231 and optionally at least a portion of the second strap assembly 3320, and the second storage slot 3122 is configured to accommodate the first connecting device 33131 and optionally at least a portion of the first strap assembly 3310. In an example, two first storage slots 3121 can be provided, each for accommodating one second connecting device 33231. In another example, only one storage slot can be provided, which accommodates two second connecting devices 33231. It needs to be noted that the specific structure and position of the first storage slot 3121 and the second storage slot 3122 can be similar to the first embodiment described above, e.g., having a recessed structure, being respectively provided on opposite sides of the bottom support 3120, etc., which can be seen from the first storage slot 2121 and the second storage slot 2122 and the related description shown in FIG. 2, which will not be repeated here.Further, as shown in FIGS. 11 and 12A, the carrier 3100 can also be provided with storage covers (first storage cover 3141 and / or second storage cover 3142) that can be opened and closed for covering and enclosing the storage space. The storage covers can be provided corresponding to the storage spaces (i.e., the first storage slots 3121 and the second storage slots 3122). In an example, the storage covers can include the first storage cover 3141 for covering the first storage slots 3121 and the second storage cover 3142 for covering the second storage slots 3122. Specifically, the first storage cover 3141 can be provided corresponding to the first storage slots 3121 to avoid interference with the first storage cover 3141 when the second connecting device 33231 is taken out of or put back into the first storage slots 3121. Likewise, the second storage cover 3142 can be provided corresponding to the second storage slots 3122 to avoid interference with the second storage cover 3142 when the first belt assembly 3310 is taken out of or put back into the second storage slots 3122. In the present embodiment, one first storage cover 3141 can be provided to cover two first storage slots 3121 simultaneously, but the present disclosure is not limited thereto, and two first storage covers can also be provided and correspond to one first storage slot 3121 respectively. Optionally, the first storage cover 3141 and / or the second storage cover 3142 can have an openable or closable opening that can be open to the outside of the carrier 3100, so that a portion of the first belt assembly 3310 and / or the second belt assembly 3320 (e.g., the second connecting device 33231 provided at the fourth connecting end 3323) can be extended out of the opening when the opening is opened, so as to fix the carrier to the vehicle seat. In an example, the opening can be detachably connected to the storage cover and / or the bottom cover 3140 through a pull chain structure, Velcro, magnetic buckle, elastic sleeve ring, etc., so as to store the fixing belt assembly 3300 in the first storage slots and / or the second storage slots, and achieve aesthetics when the opening is closed. In an example, at least a portion of the first storage cover 3141 and / or the second storage cover 3142 can be detachably or separably connected to the bottom cover 3140, or be a part of the bottom cover 3140 and be separably connected to other parts of the bottom cover 3140.The detachable or separable connection can be realized by a zipper structure, Velcro, magnetic buckle, elastic loop, etc., but the present disclosure is not limited thereto. Of course, it can be understood that the first storage cover 3141 and / or the second storage cover 3142 can have a structure, material, and setting position similar to that in the foregoing first embodiment, and will not be described here. Referring to FIGS. 13 and 14, FIG. 13 shows a perspective view of the carrier 3100 in a storage state, i.e., the fixed belt assembly 3300 is shown as being stored; and FIG. 14 is a perspective view of the carrier 3100 of FIG. 13 after the bottom cover 3140 is removed, so as to show the fixed belt assembly 3300o stored in the bottom support 3120. The storage manner of the fixed belt assembly 3300 of the present embodiment will be described below in combination with FIGS. 11, 12A, 13, and 14. Specifically, FIGS. 11 and 12A show the fixed belt assembly 3300 in a use state. When it is needed to fix the carrier 3100 to a vehicle seat through the fixed belt assembly 3300, the first storage cover 3141 can be opened and the second connecting device 33231 is taken out of the first storage slot 3121, so as to be at least partially extended from the box body 3100. For example, the second connecting device 33231 can be arranged to be substantially perpendicular to the edge of the bottom support 3120 close to the vehicle seat, and extend beyond the edge of the bottom support 3120 (i.e., extend outwardly from the edge), so as to be connected with the ISOFIX interface arranged on the vehicle seat. In addition, the second storage cover 3142 can be opened and the first belt assembly 3310 is taken out of the second storage slot 3122, so that the first belt assembly 3310 can be wound from the outside of the carrier (e.g., the box body 3110) away from the backrest of the vehicle seat to the upper side of the carrier, and be connected to the corresponding anchor point on or above the top of the vehicle seat through the first connecting device 33131 arranged at the first connecting end 3313. Referring to FIGS. 13 and 14, the carrier 3100 and the fixed belt assembly 3300 in a storage state are shown.When the carrier 3100 is not used, or the carrier 3100 does not need to be fixed to the vehicle seat by the fixing belt assembly 3300, the second connecting device 33231 can be detached from the vehicle seat and stored in the first storage slot 3121, and the first connecting device 33131 above is detached from the vehicle seat or the vehicle related connecting position and stored in the second storage slot 3122 together with the first belt assembly 3310. Then, the first storage cover 3141 and the second storage cover 3142 are closed respectively to achieve the storage of the fixing belt assembly 3300. The state of the carrier 3100 after storage is shown in FIG. 13. In addition, as shown in FIG. 12A, the bottom support 3120± is also provided with a reinforcing bracket to enhance the structural stability of the bottom support 3120 and the carrier 3100. The reinforcing bracket is arranged on the bottom side of the bottom support 3120, for example, in the bracket storage slot 3125 recessed from the bottom side of the bottom support 3120. Optionally, the bracket storage slot 3125 is arranged between the first storage slot 3121 and the second storage slot 3122. Unlike the first embodiment described above, as shown in FIG. 12A, the reinforcing bracket of the present embodiment can be a reinforcing rod 3124 and is arranged at the middle position of the bottom support 3120 in the transverse axis direction D6. Specifically, the reinforcing rod 3124 is fixedly arranged at the middle of the bottom side of the bottom support 3120 in the transverse axis direction D6 (i.e., approximately at the middle line of the bottom support 3120 in the transverse axis direction D6) and extends along the longitudinal axis direction D5. However, the reinforcing rod 3124 of the present embodiment is not limited to the above position, for example, it can also be arranged at a position deviated from the middle line of the bottom support 3120 in the transverse axis direction D6 by a certain distance, but does not interfere with the first storage slot 3121 and the second storage slot 3122. By arranging a reinforcing rod 3124 at the middle of the bottom support 3120, the structure of the bottom support 3120 can be further simplified, and its weight is reduced while its structural stability is enhanced. In an example, two support feet 3123 can be arranged on the bottom support 3120, respectively at both ends of the bottom support 3120 in the longitudinal axis direction D5, for example, near the edges of the bottom support 3120. Optionally, the two support feet 3123 are symmetrically arranged with respect to the center line of the bottom support 3120 in the longitudinal axis direction D5.Each support leg 3123 can be a plate-shaped member in a long strip shape, fixedly connected to the bottom support 3120 by fastening or adhesion, and extends substantially along the horizontal axis direction D6 of the bottom support 3120. Optionally, the support leg 3123 can have a curvature to adapt to the shape of the edge of the bottom support 3120. In this example, the two ends of the reinforcing rod 3124 can respectively extend to the two support legs 3123, for example, inserted below the support leg 3123, so that the two ends thereof are respectively defined between each support leg 3123 and the bottom support 3120, thereby limiting the reinforcing rod 3124. In combination with FIGS. 12A-12C, in this embodiment, the bottom support 3120 can also be provided with a fixing belt limiting structure 3126 for limiting the fixing belt assembly 3300. Thus, when the fixing belt assembly 3300 is used to fix the carrier 3100, the fixing belt limiting structure 3126 can limit the fixing belt assembly 3300 within a certain range without slipping off from the side surface of the box of the carrier 3100. At the same time, when the fixing belt assembly 3300 is not used, the fixing belt limiting structure 3126 can limit at least a part of the fixing belt assembly 3300 to the carrier 3100 (i.e., remain connected with the carrier 3100), so that it cannot be scattered L around the box, and facilitates the removal and rapid fixing of the carrier 3100. In an example, two fixing belt limiting structures 3126 are provided, arranged at the reinforcing rod 3124 to limit one of the third belts 3321 of the fixing belt assembly 3300, respectively. Specifically, the two fixing belt limiting structures 3126 can be fixedly arranged at the two ends of the reinforcing rod 3124, or close to the two ends of the reinforcing rod 3124. For example, the fixing belt limiting structure 3126 can be arranged close to the support leg 3123, and located at the inner side of the support leg 3123. It should be noted that the "inner side" here refers to the direction from the edge of the bottom support 3120 towards the center thereof. As shown in FIG. 12B, the fixing belt limiting structure 3126 can be fixed to the bottom support 3120 by a fastener 3128. Specifically, in this embodiment, the fastener 3128 can pass through the bottom support 3120, the reinforcing rod 3124 and the fixing belt limiting structure 3126 in sequence, so as to simultaneously fix the reinforcing rod 3124 and the fixing belt limiting structure 3126 to the bottom support 3120.Referring to FIGS. 12A-12C, the fixing belt limiting structure 3126 and the reinforcing rod 3124 have a threading gap 31264 therebetween for the fixing belt assembly (e.g., the third belt 3321) to pass through. In an example, the fixing belt limiting structure 3126 can have a first tubular structure 31261 that is sleeved and fixed on the reinforcing rod 3124, i.e., the reinforcing rod 3124 is limited between two side walls of the first tubular structure 31261. For example, the two ends of the first tubular structure 31261 can be connected with the reinforcing rod 3124 by fasteners 3128 and fixed together to the bottom support 3120. Specifically, the first tubular structure 31261 can be arranged along the longitudinal axis direction D5. In this example, a slit is arranged on the side wall of the first tubular structure 31261, which penetrates the side wall along the transverse axis direction D6, and the slits on the two side walls of the first tubular structure 31261 are communicated with each other to form the threading gap 31264 for the third belt 3321 of the fixing belt assembly to pass through, wherein the slit can be arranged close to the upper wall of the first tubular structure 31261, so that the third belt 3321 passes through the slit on one side wall of the first tubular structure 31261, extends between the inner surface of the upper wall of the first tubular structure 31261 and the outer surface of the upper side of the reinforcing rod 3124, and then exits the threading gap 31264 through the slit on the other side wall of the first tubular structure 31261, thereby limiting the fixing belt assembly in the longitudinal axis direction D5 to prevent the fixing belt assembly from accidentally coming off. It can be understood that the above-mentioned “upper wall” and “side wall” are part of the peripheral wall of the first tubular structure 31261, i.e., the peripheral wall of the first tubular structure 31261 includes the upper wall, the two side walls, and the lower wall. Optionally, the fixing belt limiting structure 3126 can also have a second tubular structure 31262 that is arranged intersecting with the first tubular structure 31261, for example, the second tubular structure 31262 can be arranged along the transverse axis direction D6 (optionally substantially perpendicular to the first tubular structure 31261), and at least communicated with each other through the threading gap 31264, thereby better limiting the fixing belt assembly. Specifically, the length of the second tubular structure 31262 extending in the transverse axis direction D6 (i.e., the length L3 of the second tubular structure 31262) is greater than the width of the first tubular structure 31261.Specifically, the third strap 3321 can extend within the second tubular structure 31262 (e.g., extend through the entire second tubular structure 31262) and through the penetration gap 31264, thereby increasing the length of the third strap 3321 at the fixed strap limiting structure 3126, so as to increase the limiting effect of the fixed strap assembly in the transverse direction D6. In this example, the second tubular structure 31262 is disposed across the reinforcing bar 3124, and the penetration gap 31264 is formed between the second tubular structure 31262 and the reinforcing bar 3124, e.g., between the inner surface of the upper wall of the second tubular structure 31262 and the upper outer surface of the reinforcing bar 3124, but the present disclosure is not limited thereto. Alternatively, the first tubular structure 31261 and the second tubular structure 31262 can be separate components assembled with each other. Alternatively or additionally, the first tubular structure 31261 and the second tubular structure 31262 can be integrally formed, wherein the slit forming the penetration gap 31264 is located on the sidewall of the first tubular structure 31261 within the second tubular structure 31262. For example, the slit extends along the length direction of the sidewall of the first tubular structure 31261 within the second tubular structure 31262, i.e., the sidewall of the first tubular structure 31261 within the second tubular structure 31262 forms a rib (e.g., “31263” shown in FIG. 12C). In other words, the penetration gap 31264 (formed by the slit) is located between the first tubular structure 31261 and the second tubular structure 31262, i.e., between the sidewall (i.e., the rib 31263) of the first tubular structure 31261 within the second tubular structure 31262 and the inner surface of the upper wall of the second tubular structure 31262. Optionally, the centerline of the first tubular structure 31261 in the vertical direction is at substantially the same horizontal level as the centerline of the second tubular structure 31262 in the vertical direction, so that the entire height or thickness of the fixed strap limiting structure 3126 is minimized to avoid the vehicle 3100 from shaking due to the unevenness of the bottom of the bottom support 3120 when placed on a vehicle seat.Of course, it can be understood that in other examples, only the second tubular structure 31262 through which the fixed band assembly (e.g., the third band 3321) extends can be provided, and the second tubular structure 31262 can be fixed to the bottom support 3120 by means of fasteners or adhesives, etc. In this example, at least one protruding rib 31263 extending along the longitudinal direction D5 can be provided in the second tubular structure 31262, and the at least one protruding rib 31263 can protrude inwardly from the upper wall and / or the lower wall of the second tubular structure 31262 (i.e., extending along the vertical direction D7) to form a gap with the lower wall and / or the upper wall of the second tubular structure 31262, i.e., the through gap 31264 through which the third band 3321 extends. Optionally, the at least one protruding rib 31263 can protrude from the lower wall to the upper wall of the second tubular structure 31262, the reinforcing rod 3124 is arranged in the second tubular structure 31262 (i.e., through the two side walls thereof), and the through gap 31264 is formed between the inner surface of the upper wall of the second tubular structure 31262 and the upper outer surface of the reinforcing rod 3124. In each example, the reinforcing rod 3124 is located between the two side walls of the first tubular structure 31261 and / or between the protruding ribs 31263. In an example, the fixed band limiting structure 3126 can be made of plastic, resin, metal, etc., but the present disclosure is not limited thereto. In addition, the first tubular structure 31261 and the second tubular structure 31262 of the fixed band limiting structure 3126 can be two separate structures fixedly connected to each other, or can be an integrally formed overall structure. Optionally, as shown in FIGS. 12A and 14, the bottom support 3120 of the present embodiment can also be provided with another fixed band limiting structure, e.g., located near the first receiving groove 3121, for limiting the fourth connecting end 3323 of the second band assembly 3320, thereby further limiting the fixed band assembly, and in particular, being able to avoid the second connecting device 33231 from swinging randomly. The other fixed band limiting structure has a structure similar to the first limiting structure 2126 in the first example, but can also have other structures, and the present disclosure is not limited thereto.Optionally or alternatively, the bottom cover is connected with the bottom support 3120 near the first receiving groove 3121 and / or the second receiving groove 3122, for example through an adhesive structure, a snap structure, etc., and optionally, a gap is further provided at the connection structure for the third strap 3321 to pass through, so as to further limit and fix the strap assembly. In addition, the bottom support 3120 can further be provided with a recess for the strap assembly to extend through, so as to prevent the strap assembly from sliding left and right to a greater extent, and further reduce the overall weight of the bottom support 3120. FIG. 15A shows a perspective view of the carrier 4100 and the strap assembly 4300 according to the third embodiment of the present disclosure, wherein the bottom cover is removed to show the specific structure of the bottom support 4120 and the specific connection mode with the strap assembly 4300. FIG. 15B shows a partial cross-sectional view taken along line K-K in FIG. 15A, and FIG. 15C shows a partial cross-sectional view taken along line N-N in FIG. 15A. In addition, FIG. 15A shows the carrier 4100 and the strap assembly 4300 in a use state, and FIG. 16 shows the carrier 4100 and the strap assembly 4300 in a receiving state. As shown in FIG. 15A, the carrier 4100 and the strap assembly 4300 in the third embodiment of the present disclosure have a similar structure to the second embodiment, and the difference lies in that no reinforcing support is provided in the present embodiment, i.e., no reinforcing rod 3124 as shown in FIG. 12A is provided. Specifically, the bottom support 4120 of the present embodiment can also be provided with a strap limiting structure 4126 for limiting the strap assembly 4300. In an example, two strap limiting structures 4126 can be provided, respectively at or near the two ends of the bottom support 4120 in the longitudinal axis direction D8. For example, two support feet 4123 are provided at the bottom side of the bottom support 4120, and are respectively provided at the two ends of the bottom support 4120 in the longitudinal axis direction D8, for example, near the edges thereof. The two strap limiting structures 4126 can be respectively provided at one of the support feet 4123, and specifically can be provided at the inner side of the support foot 4123, so as to avoid interference between the support foot 4123 and the strap assembly 4300.Optionally, the two fixed band limiting structures 4126 are symmetrically arranged about the midline of the bottom support 4120 in the longitudinal axial direction D8, that is, both are on a line (virtual line, not shown in the figure) extending in the longitudinal axial direction D8. In the present embodiment, the two fixed band limiting structures 4126 can be arranged at the midline position of the bottom support 4120 in the transverse axial direction D9, but the present disclosure is not limited thereto, and can also be arranged to be deviated from the midline position. In another embodiment, only one fixed band limiting structure 4126 can also be arranged, which can be arranged to extend in the longitudinal axial direction D8 of the bottom support 4120 and simultaneously limit the two third bands 4321, but the present disclosure is not limited thereto. In combination with FIGS. 15A-15C, as in the aforementioned second embodiment, the fixed band limiting structure 4126 of the present embodiment can have a first tubular structure 41261 and / or a second tubular structure 41262. In an example, the fixed band limiting structure 4126 can only have the first tubular structure 41261, which has a length extending in the longitudinal axial direction D8. The fixed band limiting structure 4126 can be fixedly arranged on the bottom support 4120, for example, the two ends of the first tubular structure 41261 along its length are connected to the bottom support 4120 by a fastener 4128. In this example, the first tubular structure 41261 has a slit extending through the side wall thereof in the transverse axial direction D9, and the slits on the two side walls of the first tubular structure 41261 are through to each other to form a threading gap 41264 for the third band 4321 of the fixed band assembly to pass through, thereby limiting a portion of the third band 4321 within the threading gap 41264 of the fixed band limiting structure 4126, avoiding the fixed band assembly from accidentally coming off. Optionally, the slit can be arranged close to the upper wall of the first tubular structure 41261. In another example, the fixed band limiting structure 4126 can only have the second tubular structure 41262, which has a length extending in the transverse axial direction D9. The third band 4321 of the fixed band assembly 4300 can pass through the second tubular structure 41262, so that the movement thereof in the longitudinal axial direction D8 is limited.The second tubular structure 41262 can be fixedly connected to the bottom support 41200 by means of fasteners or adhesives, etc. Optionally, at least one rib 41263 extending in the longitudinal axial direction D8 can be provided in the second tubular structure 41262, and the at least one rib 41263 can protrude inwardly (i.e., extending in the vertical direction D10) from the upper wall and / or the lower wall of the second tubular structure 41262 to form a slit (i.e., the through gap 41264), so as to further limit the movement of the third belt 4321 in the vertical direction D10 and make it more stable. In a specific example, the at least one rib 41263 can be a plurality of ribs 41263, and the plurality of ribs 41263 protrude downwardly from the upper wall of the second tubular structure 41262 or protrude upwardly from the lower wall of the second tubular structure 41262. In another specific example, the at least one rib 41263 can be alternately provided on the upper wall and the lower wall of the second tubular structure 41262 and protrude downwardly and upwardly, respectively. However, the present disclosure is not limited thereto, and the ribs can also be arranged in other manners. In yet another example, the fixing belt limiting structure 4126 can have both the first tubular structure 41261 and the second tubular structure 41262 crossing each other, wherein the first tubular structure 41261 and the second tubular structure 41262 can have the structures in the foregoing examples, respectively, which will not be described herein. The slit of the first tubular structure 41261 and the slit (or the through gap) of the second tubular structure 41262 communicate with or coincide with each other to form the through gap 41264. In an example, the first tubular structure 41261 and the second tubular structure 41262 can be separate structures that are sleeved and communicated with each other, but the present disclosure is not limited thereto. In another example, the first tubular structure 41261 and the second tubular structure 41262 can be integrally formed structures. It should be noted that the side wall of the first tubular structure 41261 having the slit can also be the rib 41263 in the second tubular structure 41262. Furthermore, the first tubular structure 41261 and / or the second tubular structure 41262 can be made of plastic, resin, metal, etc., but the present disclosure is not limited thereto.Furthermore, the fixing band limiting structure 4126 in the present embodiment can be fixed by the support feet 4123 provided at both ends of the bottom support member 4120, or can be fixed together with the support feet 4123 by fasteners penetrating through the support feet 4123 and the fixing band limiting structure 4126, but the present disclosure is not limited to the above-mentioned manners. By the present embodiment, i.e., directly providing the fixing band limiting structure on the bottom support member 4120 without providing reinforcing supports such as reinforcing rods, the structure of the bottom support member 4120 can be further simplified, and the weight thereof is further reduced, while the carrier 4100 can be stably fixed to the vehicle seat. FIG. 17 shows a bottom perspective view of a carrier 5100 according to a fourth embodiment of the present disclosure, in which the bottom cover member is removed to show the bottom support member 5120 of the carrier 5100. FIG. 18 shows a bottom view of the carrier 5100 of FIG. 17, which specifically shows the specific structure of the bottom support member 5120. FIGS. 19A and 19B show a perspective view and a top view of a fixing band limiting structure 5126. FIG. 20 shows a perspective view of the carrier 5100 shown in FIG. 17 when fixed to a vehicle seat 5600. As shown in FIGS. 17, 18 and 20, the bottom support member 5120 of the carrier 5100 of the present embodiment can be provided with the fixing band limiting structure 5126 and / or the reinforcing rod 5124. The reinforcing rod 5124 can have a similar structure and arrangement manner as the second embodiment described above, which will not be described herein. Hereinafter, the differences between the present embodiment and the foregoing embodiments will be mainly described. In the present embodiment, the fixing band limiting structure 5126 is configured to limit the fixing band assembly 5300 (see FIG. 20), so that the fixing band assembly 5300 will not slide off the box body of the carrier 5100 when in use, and so that the fixing band assembly 5300 can be at least partially limited in the carrier 5100 when not in use, so that it will not be scattered around the carrier 5100, facilitating quick taking out and fixing. In an example, two fixing band limiting structures 5126 can be provided on the bottom support member 5120, which limit one of the third bands 5321 of the fixing band assembly 5300, respectively. Specifically, the two fixing band limiting structures 5126 can be provided on the reinforcing rod 5124, for example, fixedly provided at both ends of the reinforcing rod 5124, or close to both ends of the reinforcing rod 3124.Optionally, the fixing belt limiting structure 5126 can be disposed close to the support leg 5123 and located at the inner side of the support leg 5123. In another example, the reinforcing rod 5124 can not be disposed on the device 5100, and two fixing belt limiting structures 5126 are respectively disposed at or near the two ends of the bottom support 5120 along the longitudinal axis direction D11. Optionally, the fixing belt limiting structure 5126 can have a first tubular structure 51261 and / or a second tubular structure 51262. In this embodiment, as shown in FIGS. 18-19B, the fixing belt limiting structure 5126 can have the first tubular structure 51261 and the second tubular structure 51262 intersecting with each other. The first tubular structure 51261 can be disposed along the longitudinal axis direction D11. Specifically, the first tubular structure 51261 can extend on the longitudinal axis direction D11 to be sleeved and fixed at or near the two ends of the reinforcing rod 5124. The second tubular structure 51262 can be disposed at an angle with the first tubular structure 51261, that is, the second tubular structure 51262 is also at an angle with the reinforcing rod 5124. For example, as shown in FIG. 18, at least a portion of the second tubular structure 51262 is inclined (i.e., at an angle) relative to the longitudinal axis direction D11 and the transverse axis direction D12 of the device 5100, so that the distance between the first ends 51262a of the two second tubular structures 51262 located at the two ends of the bottom support 5120 is less than the distance between the second ends 51262b of the two second tubular structures 51262. It should be noted that when the device 5100 is placed on the vehicle seat, the first end 51262a of the second tubular structure 51262 is the end close to the backrest of the vehicle seat, and the second end 51262b is the end away from the backrest of the vehicle seat. As can be seen from FIGS. 18 and 20, by disposing such a fixing belt limiting structure 5126, when the device 5100 is fixed on the vehicle seat 5600 by the fixing belt assembly 5300, the distance between the two belt bodies abutting against the front side of the device 5100, for example, the second belt body 5312 connected or integrally formed with the third belt body 5321, is increased, which is indicated by the reference sign “W5” in the figure, that is, the distance W5 shown in FIG. 20 is greater than the distance W4 shown in FIG. 10.Thus, in the event of a sudden stop of the vehicle due to a collision or an emergency situation, the pet can be prevented from colliding with the relatively hard strap body due to tension, thereby improving the safety of the pet in the carrier 5100. In one example, the first tubular structure 51261 and the second tubular structure 51262 can be in communication with each other through at least a through gap (not shown, similar to the aforementioned "31264" in the foregoing embodiment, which will not be described herein). Thus, the fixed strap assembly (e.g., the third strap 5321 thereof) can extend within the second tubular structure 51262 and through the through gap between the first tubular structure 51261 and the second tubular structure 51262. Alternatively, the first tubular structure 51261 and the second tubular structure 51262 can be integrally formed, wherein the through gap is located on the sidewall of the first tubular structure 51261 within the second tubular structure 51262. Alternatively, the first tubular structure 51261 and the second tubular structure 51262 can be separate components assembled with each other. In another example, the first tubular structure 51261 and the second tubular structure 51262 are not in communication with each other. For example, the first tubular structure 51261 is configured to be fixed to the bottom support member 5120, for example, by fasteners, and to be sleeved on the reinforcing rod 5124, so as to fix the reinforcing rod 5124 and the fixed strap limiting structure 5126 on the bottom support member 5120. The second tubular structure 51262 is configured to guide and limit the fixed strap assembly. The first tubular structure 51261 and the second tubular structure 51262 can be stacked with each other. In other examples, the fixed strap limiting structure 5126 can only include the second tubular structure 51262, which is fixedly connected to the bottom support member 5120, so as to guide and limit the fixed strap assembly. Alternatively, compared with the second tubular structure 31262 (see FIG. 12A) in the foregoing embodiment, as shown in FIGS. 18 and 19B, the second tubular structure 51262 in the present embodiment has a longer length L4, i.e., L4>L3, further increasing the length of the extension of the third strap 5321 in the fixed strap limiting structure 5126, thereby further increasing the limiting effect on the fixed strap assembly. In addition, as shown in FIG. 18, one or more glue-reducing grooves 5127 can also be provided on the bottom support member 5120 of the present embodiment, and the positions thereof avoid other structures on the bottom support member 5120, which is conducive to the molding of the bottom support member 5120 and can reduce the weight of the bottom support member 5120 and the carrier 5100.FIG. 21 shows a rear view of the carrier 6100, i.e., a view from the side of the carrier 6100 that is proximate to the backrest of the vehicle seat when the carrier 6100 is placed on the vehicle seat, according to a fifth embodiment of the present disclosure. The carrier 6100 of the present embodiment differs from the aforementioned embodiments in that the size of the first window 6116A located on the rear side (i.e., the side support 6111 that is proximate to or contacts the backrest of the vehicle seat when the carrier 6100 is placed on the vehicle seat) can be larger than the size of the first window 6116B located on the front side (i.e., the side support 6111 that is distal from the backrest of the vehicle seat). When the carrier 6100 is placed on the vehicle, at least a portion of the rear side or the entire rear side of the carrier 6100 abuts against the backrest of the vehicle seat, and by increasing the size of the first window 6116A on the rear side, i.e., making it larger than the size of the first window 6116B on the side distal from the backrest of the vehicle seat, the air permeability of the rear side of the carrier 6100 is improved. In addition, the window 6116A and / or the first window 6116B can have a substantially rectangular shape, but the present disclosure is not limited thereto, and can also have a circular, elliptical, trapezoidal, or the like shape. Next, a second group of embodiments for fixing the carrier to the vehicle seat will be described. It should be understood that some components or structures of the embodiments of the first group can also be applied to the embodiments of the second group. For the sake of brevity, the description of the embodiments described below will omit the description of components or structures that are the same as those of the aforementioned embodiments. There are an increasing number of caregivers who use carriers (such as sleep boxes) for children or pets, etc. to ensure their safety in a moving vehicle. In order to more stably fix the box to the vehicle seat, some existing carriers use a combination of a Top Tether assembly and a LATCH assembly for fixing. Different vehicle types can have different anchor points, for example, a common Tether anchor point (i.e., an anchor point on the vehicle for connecting the end of the Top Tether assembly) can be located at a position on the top of the trunk proximate to the backrest of the vehicle seat (hereinafter referred to as "anchor point G1"), or at a more distal corner position on the top of the trunk relative to the carrier, or below the backrest of the vehicle seat (hereinafter referred to as "anchor point G2"), where the anchor point G1 is closer to the carrier, and the anchor point G2 is farther from the carrier.Generally, in order to connect to anchorage point G1 or anchorage point G2, the tether strap of the existing Top Tether assembly is adjustable in length. But because the extension rate of the tether strap is constant, when connected to different anchorage points for crash testing, there can be a large difference in the test results at each anchorage point, and some test data cannot meet the safety requirements of the carrier, that is, the existing Tether assembly is not effective in protecting children or pets when connected to certain anchorage points, affecting safety. The present disclosure provides a connection and fixing device (also referred to as a "fixing strap assembly") M300o Referring to FIGS. 22-25, FIG. 22 is a perspective view of a carrier M100 fixed to a vehicle seat M500 through a connection and fixing device M300; FIG. 23 is a perspective view of the connection and fixing device M300; FIG. 24 is a perspective view of the carrier M100 provided with the connection and fixing device M300, wherein the bottom cover covering the outside of the bottom support M120 is removed to show the connection of the connection and fixing device M300 with the bottom support M120; and FIG. 25 is a perspective view of the bottom support M120 provided with the connection and fixing device M300. As shown in FIG. 22, the carrier M100 includes a box body M110 and a bottom support M120o The bottom support M120 is detachably connected to the box body M110 and forms a box with the box body M110 to provide a space for accommodating a pet or a child.The connection fixing device M300 can be configured to fix the carrier M100 to the vehicle seat M500. In an example, at least a portion of the connection fixing device M300 can be wrapped around a side of the carrier M100 away from the backrest of the vehicle seat M500, such that the carrier M100 can be able to abut against the backrest of the vehicle seat M500 and be tied to the vehicle seat M500. Specifically, a first connection end of the connection fixing device M300 can be connected to a corresponding anchor point (hereinafter referred to as “first anchor point”) on the top of the vehicle seat or above it, and at least a portion (e.g. a strap body thereof) of the connection fixing device M300 is wrapped from above the carrier M100, from a side of the carrier M100 away from the backrest of the vehicle seat M500, to below the carrier M100, so as to connect a second connection end of the connection fixing device M300 to another anchor point (hereinafter referred to as “second anchor point”) on the vehicle seat, such as a vehicle safety belt interface or ISOFIX interface, but the present disclosure is not limited to the above connection positions and wrapping manners. With reference to FIGS. 22 and 23, the connection fixing device M300 of the present embodiment can be a fixing strap assembly, which comprises a first strap connecting assembly (also referred to as a first strap assembly) M301 and a second strap connecting assembly (also referred to as a first strap assembly) M302. The first strap connecting assembly M301 and the second strap connecting assembly M302 can be detachably connected to each other for replacement, replacement or maintenance, etc. Specifically, one end (also referred to as a “first end”) of the first strap connecting assembly M301 constitutes a first connection end of the connection fixing device M300, and the other end (also referred to as a “second end”) of the first strap connecting assembly M301 is detachably connected to a first end M332 of the second strap connecting assembly M302, and a second end M333 of the second strap connecting assembly M302 constitutes a second connection end of the connection fixing device M300. In the present embodiment, the first strap connecting assembly M301 can comprise a first strap structure M310 and a second strap structure M320, which are alternatively used and are respectively detachably connected to the second strap connecting assembly M302. That is, the first strap structure M310 and the second strap structure M320 are not used at the same time.The first strap structure M310 or the second strap structure M320 can be alternatively used in connection with the second strap connecting component M302 for different anchoring points or anchoring manners in a vehicle. For example, when the carrier M100 is placed on a vehicle that uses the anchoring point G1 as the first anchoring point, the carrier M100 can be fixed by the first strap structure M310; and when the carrier M100 is placed on a vehicle that uses the anchoring point G2 as the first anchoring point, the first strap structure M310 can be replaced by the second strap structure M320 so as to fix the carrier M100 to the vehicle seat M500 by the second strap structure M320. Specifically, as shown in FIG. 23, the first strap structure M310 can include a first strap body M311, and a first end M312 and a second end M313 located at two ends of the first strap body M311. When the first strap structure M310 is connected with the second strap connecting component M302, the first end M312 of the first strap structure M310 constitutes the first connecting end of the connecting and fixing device M300, and the second end M313 is detachably connected to the second strap connecting component M302. For example, the first strap structure M310 can be a Top Tether component, and the second strap connecting component M302 can be a LATCH component. In an example, the first end M312 can be provided with a hook (for example, a Tether hook) to be connected with the first anchoring point provided on the vehicle. Alternatively or additionally, the second end M313 can be provided with a buckle to be detachably matched with a plug provided at the first end M332 of the second strap connecting component M302, but the present disclosure is not limited thereto. In other examples, the second end M313 of the first strap structure M310 and the detachable connecting structure provided at the first end M332 of the second strap connecting component M302 can also be a hook-and-loop structure, a snap structure, etc., and the structures of the two can be interchangeable. Similarly, the second strap structure M320 can also include a second strap body M321, and a first end M322 and a second end M323 located at two ends of the second strap body M321. When the second strap structure M320 is connected with the second strap connecting component M302, the first end M322 of the second strap structure M320 constitutes the first connecting end of the connecting and fixing device M300, and the second end M323 is detachably connected to the second strap connecting component M302.In an example, the second strap structure M320 can also be a Top Tether assembly, and the first end M322 and the second end M323 of the second strap structure M320 can be provided with similar structures as the first strap structure M310, such as detachably connectable mating structures like hooks and buckles respectively, which will not be repeated here. By providing such detachable connections, the first strap structure M310 and the second strap structure M320 can be conveniently replaced, while ensuring reliable and stable connection between the first strap structure M310 or the second strap structure M320 and the second strap connection assembly M302, so as to be applicable to different types of vehicles using different first anchor points. Furthermore, the first strap structure M310 can be provided with a first length adjuster M314 to adjust the initial effective length of the first strap structure M310. Additionally or alternatively, the second strap structure M320 can be provided with a second length adjuster M324 to adjust the initial effective length of the second strap structure M320. It should be noted that although the drawings show that length adjusters are provided on both the first strap structure M310 and the second strap structure M320, the present disclosure is not limited thereto, i.e. neither of them can be provided with a length adjuster, or a length adjuster can be provided selectively. Optionally, the initial effective length of the first strap body M311 of the first strap structure M310 can be smaller than the initial effective length of the second strap body M321 of the second strap structure M320, so as to adapt to the different distances between the carrier M100 and the corresponding anchor points on the vehicle. It should be noted that the “initial effective length” (which can also be referred to as “use length”) herein refers to the length of the strap body for fixing the carrier M100 when the carrier M100 is fixed to the seat of the vehicle and is not subjected to impact. That is, in the present embodiment, the total length of the first strap body M311 (i.e. the length possessed by the strap body itself) can be smaller than the total length of the second strap body M321; or the first strap body M311 and the second strap body M321 can also have the same total length, and then be adjusted to different initial effective lengths by the length adjusters to adapt to the first anchor points of different vehicle types. In the present embodiment, the first strap structure M310 and the second strap structure M320 can have a certain elongation rate respectively.In an example, the first strap structure M310 (e.g., the first strap body M311 thereof) has a different elongation rate than the second strap structure M320 (e.g., the second strap body M321 thereof). Specifically, the first strap body M311 of the first strap structure M310 can have a greater elongation rate than the second strap body M321 of the second strap structure M320. For example, the elongation rate of a strap body can be tested by taking a length L1 of the strap body, applying a force to the strap body, such as 5560 N (1250 Ibf), measuring the length of the strap body after it is stretched, i.e., L2, and calculating the percentage of the elongation rate of the strap body by the formula (L2-L1) / L1*100%, although the disclosure is not limited to the above testing method. Based on the above testing, it can be understood that, under the same testing (force) conditions, because the first strap body M311 is shorter and is configured to have a greater elongation rate, i.e., the strap body is softer (greater deformation amount), so that after it is subjected to an impact force, a greater amount of deformation can result in a greater amount of cushioning. Because the second strap body M321 is longer and is configured to have a smaller elongation rate, i.e., the strap body is harder (smaller deformation amount), so that after it is subjected to an impact force of the same size, a longer strap body combined with a smaller amount of deformation can also result in the same amount of cushioning effect, thereby making the load M100 fixed on the vehicle seat more stable. Through the above testing method, the first strap body M311 can have an elongation rate of 17% to 26%, and the second strap body M321 can have an elongation rate of 7% to 16%. Specifically, the first strap body M311 can have an elongation rate of 21%, and the second strap body M321 can have an elongation rate of 12%. Of course, the disclosure is not limited to the above values. By providing the first strap structure M310 and the second strap structure M320 having different elongation rates on the connection and fixing device M300, the connection and fixing device M300 can better adapt to fixing the load M100 to vehicles of different types (i.e., using different anchor points).For example, when the vehicle uses the anchoring point G1 (i.e., the position on the top of the trunk close to the backrest of the vehicle seat M500, not shown in the figure) close to the carrier M100 to fix the carrier M100, the first belt structure M310 with a larger elongation rate can be used in the connection fixing device M300; while when the vehicle uses the anchoring point G2 (i.e., the position on the top of the trunk at a more remote angle position relative to the carrier M100, or below the backrest of the vehicle seat M500) far from the carrier M100 to fix the carrier M100, the second belt structure M320 with a smaller elongation rate can be used. Thus, the instantaneous stress of the first belt body M311 and the second belt body M321 when the carrier M100 is impacted can be reduced, that is, the instantaneous stress of the belt body is buffered by slow deformation, so that the belt body (such as the first belt body M311) is not instantly broken due to its shortness, or the belt body (such as the second belt body M321) is not deformed too much due to its lengthiness, thereby reducing the binding force on the carrier. More specifically, when the carrier M100 is fixed through the anchoring point G1, the effective connection distance between the first belt structure M310 and the anchoring point G1 is short, that is, the initial effective length of the first belt body M311 is short, and by increasing the elongation rate, the overall deformation amount of the first belt body M311 can be increased to slow down the deformation and reduce the instantaneous stress of the belt body, thereby avoiding breakage and ensuring the binding force on the carrier; when the carrier M100 is fixed through the anchoring point G2, the effective connection distance between the second belt structure M320 and the anchoring point G2 is long, that is, the initial effective length of the second belt body M321 is long, and by reducing the elongation rate, the overall deformation amount of the second belt body M321 can be reduced to ensure the binding force on the carrier, thereby firmly and stably fixing the carrier M100 on the vehicle seat. In addition, as shown in FIG. 23, the second belt connecting assembly M302 includes a third belt body M331, and a first end M332 and a second end M333 located at two ends of the third belt body M331, respectively. Specifically, the first end M332 of the second belt connecting assembly M302 is detachably connected to the second end M313 of the first belt structure M310 or the second end M323 of the second belt structure M320. The second belt connecting assembly M302 can include at least one second end M333, and the first end M332 and each second end M333 can be connected through a corresponding third belt body M331.For example, in the present embodiment, the second belt connecting assembly M302 can be provided with two second ends M332, and a first end M332 can be connected with each of the second ends M332 through a third belt body M331, i.e., the second belt connecting assembly M302 includes two third belt bodies M331 corresponding to the two second ends M332 respectively; and alternatively, the two second ends M332 can be connected through one third belt body M331, and the third belt body M331 can be slidably connected to a connector (such as a buckle, a ring, etc.) provided at the first end M332, so that the position of the first end M332 on the third belt body M331 is adjustable, thereby better adapting to the outer contour of the carrier M100 fixed on the vehicle seat, so as to more stably bind the carrier M100 to the vehicle seat. In an example, the first belt body M311, the second belt body M321 and / or the third belt body M331 can be a woven belt with elastic force, but the present disclosure is not limited thereto. In addition, although not shown in the figure, it can be understood that the second belt connecting assembly M302 can also include a length adjuster to adjust the initial effective length of the third belt body M331. In combination with reference to FIGS. 24 and 25, at least a part (such as a belt body) of the connecting fixing device M300 can be connected to the carrier M100, so that when the carrier M100 is fixed to the vehicle seat through the connecting fixing device M300 (see FIG. 22), the connecting fixing device M300 is not easy to slide off from the carrier M100. Specifically, in the present embodiment, a belt limiting structure M126 (which has the same structure and function as the fixing belt limiting structure in the foregoing embodiment) can be provided on the bottom support M120 (such as the bottom thereof), for limiting at least a part of the belt body (such as the third belt body M331 of the second belt connecting assembly M302) of the connecting fixing device M300. Thus, when the carrier M100 is fixed by using the connecting fixing device M300, the belt limiting structure M126 can limit the connecting fixing device M300 within a certain range, so that it will not be separated from the carrier M100. As shown in FIG. 24, the third belt body M331 can pass through the belt limiting structure M126 in the horizontal axis direction MD2, thereby limiting the movement of the third belt body M331 in the longitudinal axis direction MD1, to prevent the connecting fixing device M300 from sliding off from the side of the box body of the carrier M100.In an example, two belt limiting structures M126 can be provided, and the two belt limiting structures M126 are respectively located at or near two ends of the bottom support M120 in the longitudinal axial direction MD1. Optionally, the two belt limiting structures M126 are symmetrically arranged about the middle line of the bottom support M120 in the longitudinal axial direction MD1. In another example, only one belt limiting structure M126 can also be provided, which can be arranged to extend in the longitudinal axial direction MD1 of the bottom support M120 and simultaneously limit the third belt body M331 connected to the two ends (in the longitudinal axial direction MD1) of the bottom support M120, but the present disclosure is not limited thereto. In an example, as shown in FIGS. 24 and 25, a reinforcing support can also be provided on the bottom support M120 to enhance the structural stability of the bottom support M120 and the carrier M100. The reinforcing support of the present embodiment can be a reinforcing rod M124, which is arranged at the middle position of the bottom support M120 in the transverse axial direction MD2. The belt limiting structure M126 can be arranged on the reinforcing rod M124. For example, two belt limiting structures M126 can be fixedly arranged at or near the two ends of the reinforcing rod M124, respectively, to limit the third belt body M331 passing through the belt limiting structure M126. Referring to FIGS. 26A and 26B, FIG. 26A shows a partial perspective view of the second belt connecting assembly M302 of the connecting and fixing device M300 according to another embodiment of the present disclosure connected to the bottom support M120, and FIG. 26B shows a structural schematic view of the second belt connecting assembly M302 at the position connected to the bottom support M120. In another embodiment, the connecting and fixing device M300 can have a similar structure as in the foregoing embodiments, which will not be described herein again. The difference of the present embodiment is that a buffering structure can be arranged on the connecting and fixing device M300 to further improve the buffering effect on the carrier M100.In the present embodiment, the buffer structure can be arranged between the first connecting end (also referred to as the "first connecting device") and the second connecting end (also referred to as the "second connecting device") of the connecting fixture M300, such as the first belt body M311 and / or the second belt body M321 of the first belt connecting component M301 and / or the third belt body M331 of the second belt connecting component M302. In an example, the buffer structure can be arranged at the (non-contact or contact) portion of the connecting fixture M300 surrounding the carrier M100. Alternatively, the buffer structure can be arranged at the position where the connecting fixture M300 is connected (or in contact) with the carrier M100. As shown in FIG. 26A, the buffer structure can be arranged at the position of the second belt connecting component M302 of the connecting fixture M300 where the third belt body M331 is connected with the bottom support M120, such as the portion of the third belt body M331 passing through the belt limiting structure M126. Specifically, the buffer structure can include a buffer belt M334 fixed on the third belt body M331 of the second belt connecting component M302 through sewing, and specifically, the first sewing line MX1 (also referred to as the first fixing member) and the second sewing line MX2 (also referred to as the second fixing member) shown in FIGS. 26A and 26B can be referred to, wherein the initial effective length of the buffer belt M334 is defined between the first sewing line MX1 and the second sewing line MX2, but the buffer structure of the present disclosure is not limited to the above structure. In the present embodiment, by arranging such a buffer belt M334, better buffering for the carrier M100 when impacted can be provided. In an example, the buffer structure M334 can be arranged at the bottom of the bottom support M120 and covered by the bottom cover member covering the outside of the bottom support M120, thus being well hidden at the bottom of the carrier M100 and improving the overall appearance of the carrier M100. In other embodiments, the buffer structure of the present disclosure can also have other structures, and the present disclosure is not limited thereto. The buffer structure can also include a knotting point arranged on the connecting fixture and / or the buffer belt M334.In one example, in combination with reference to FIGS. 26A and 26B, the third strap M331 can be provided with a knot point MC1 at a portion corresponding to the buffer strap M334. As shown in FIG. 26B, the knot point MC1 of the third strap M331 can be located between the first stitching point MX1 and the second stitching point MX2 of the third strap M331, and optionally, a plurality of knot points MC1 can be provided on the third strap M331. When the carrier is impacted to cause the third strap M331 to be pulled, the effective length of the third strap M331 can be further increased (i.e., from the initial effective length to the buffer effective length) by releasing (e.g., pulling apart) the knot point MC1, thereby providing more and further buffer for the carrier. Alternatively or additionally, the knot points as buffer structures can also be provided at other locations. For example, the embodiments of FIGS. 27A-27D each show a specific buffer structure, but it should be understood that these embodiments are merely exemplary and not limiting. It is noted that in the context of the present disclosure, the “initial effective length” of the buffer strap M334 and the “initial effective length” of the third strap M331 can be considered as the length between the first stitching point MX1 and the second stitching point MX2 (i.e., between the fasteners of the two) when not subjected to pulling force, i.e., not stretched, or when the knot points or other buffer structures provided thereon are not released or implemented; and the “buffer effective length” of the buffer strap M334 and the third strap M331 can be considered as the length when the buffer structures are in action (i.e., the buffer strap M334 is stretched by force, or the knot points of the buffer strap M334 and / or the third strap M331 are opened). As shown in FIG. 27A, the buffer structure can include a buffer strap M334, both ends of which are fastened to the third strap M331 by sewing (i.e., the first stitching point MX1 and the second stitching point MX2). Specifically, the buffer strap can be provided above the third strap M331. Optionally, the initial effective length of the buffer strap M334 between the first stitching point MX1 and the second stitching point MX2 is less than the initial effective length of the third strap M331 between the two stitching points MX1, MX2. Alternatively or additionally, the extension rate of the buffer strap M334 is greater than that of the third strap M331.As shown in FIG. 27B, the buffer structure can include a plurality of buffer strips M334, each of which is fixed to the third belt body M33E at both ends thereof by means of a sewing machine. Optionally, each of the plurality of buffer strips M334 has an initial effective length between the first and second sewing points MX1, MX2 that is less than the initial effective length of the third belt body M331 between the first and second sewing points MX1, MX2. Alternatively or additionally, each of the plurality of buffer strips M334 has an elongation that is greater than the elongation of the third belt body M331. In the present embodiment, the plurality of buffer strips M334 of the buffer structure can have the same elongation, or can have different elongations. In one example, each of the plurality of buffer strips is disposed above the third belt body M331, or alternatively, at least one of the plurality of buffer strips is disposed below the third belt body M331. As shown in FIG. 27C, the buffer structure can include a buffer strip M334 in the form of a loop structure, or a buffer strip that is folded in half, and the looped or folded buffer strip M334 is fixed to the third belt body M331, e.g., above the third belt body M331, at both ends thereof in the length direction of the third belt body M331. Optionally, the initial effective length of the buffer strip M334 between the first and second sewing points MX1, MX2 (i.e., the length of either of the two sections of the looped or folded buffer strip M334 between the first and second sewing points MX1, MX2) is less than the initial effective length of the third belt body M331 between the first and second sewing points MX1, MX2. Alternatively or additionally, the buffer strip M334 has an elongation that is greater than the elongation of the third belt body M331. As shown in FIG. 27D, the buffer structure can include a buffer strip M334 and at least one knot MC2 disposed on the buffer strip M334, and both ends of the buffer strip M334 are fixed to the third belt body M33E by means of a sewing machine. Optionally, the initial effective length of the buffer strip M334 between the first and second sewing points MX1, MX2 (i.e., the effective length of the buffer strip M334 between the first and second sewing points MX1, MX2 when the knot MC2 on the buffer strip M334 is not released) is less than the initial effective length of the third belt body M331 between the first and second sewing points MX1, MX2.Moreover, in the present embodiment, the extension rate of the buffer belt M334 is smaller than the extension rate of the third belt body M331, so that when the vehicle is impacted to pull the buffer belt M334 and the third belt body M331, the buffer can be first performed by the knot point MC2 on the buffer belt M334, that is, the knot point MC2 can be released to make the buffer belt M334 unfold, that is, the buffer effective length between the two stitching points MX1, MX2 is greater than the effective length of the third belt body M331 between the two stitching points (that is, the length of the third belt body M331 without the knot point, or the length when the knot point on the third belt body M331 is released), thereby playing a buffering effect on the vehicle. In another embodiment, at least one knot point MC2 can be provided on the buffer belt M334, and the buffer effective length of the buffer belt M334 between the first stitching point MX1 and the second stitching point MX2 (that is, the length after the knot point MC2 is released) can still be smaller than the effective length of the third belt body M331 between the two stitching points (including the initial effective length, and the length when the knot point is released in the case of providing the knot point MC1). At this time, the extension rate of the buffer belt M334 can be greater than the extension rate of the third belt body M331, thereby providing a better buffering effect when the vehicle is impacted, and reducing the instantaneous force of the buffer belt M334, avoiding its breakage, thereby ensuring the binding force on the vehicle. Although not shown in the figure, it should be understood that in the above embodiments shown in FIGS. 27A to 27D, at least one knot point (such as the knot point MC1 shown in FIG. 26B) can also be provided on the third belt body M331, but the present disclosure is not limited thereto. Moreover, the present disclosure is not limited to the above embodiments, and the specific structure of the buffer structure (including the buffer belt M334, the first knot point MC1 and / or the second knot point MC2) and / or the third belt body M331 in each of the above embodiments can be used in combination or alternatively. Furthermore, it should be noted that although the figure only shows that the third belt body M331 is provided with a buffer structure, it should be understood that other belt bodies (such as the first belt body M311 and / or the second belt body M321) connected to the fixing device M300 can also be provided with a buffer structure at the position around the vehicle M100 or connected or contacted with the vehicle M100, and the present disclosure is not limited thereto.In other words, in the present disclosure, a buffering structure can be provided on at least one of the first strap M311, the second strap M321, and the third strap M331. Moreover, the buffering structure provided on the first strap M311 and / or the second strap M321 can also have the structure described in any of the above embodiments, which will not be described again herein. By providing a buffering structure on at least one of the first strap M311, the second strap M321, and the third strap M331 (which can be collectively referred to as "straps") of the connection fixture M300, the straps of the connection fixture M300 can have a good buffering effect on the carrier when the carrier is subjected to an impact, thereby improving the crashworthiness and safety of the carrier. In the following, a third group of embodiments for fixing the carrier to a vehicle seat will be described. It should be understood that some components or structures in each group of embodiments can also be applied to other groups of embodiments. For the sake of simplicity, the description of the embodiments described below will omit the description of the components or structures that are the same as those in the foregoing embodiments. Some carriers are fixed to vehicle seats through LATCH components and / or Top Tether components when the moving distance is long and needs to be transported in cooperation with the vehicle. However, each time the user needs to cooperate for use, the user needs to connect these components to the carrier first before use, which causes the use steps to be cumbersome and inconvenient. In particular, when the soft LATCH component is clamped to the anchor point of the vehicle seat, since two LATCH connection devices cannot be clamped in place at one time, the user needs to clamp two LATCH connection devices to the corresponding positions of the carrier respectively, then tighten the connecting webbing of the LATCH component, and then fix the carrier to the vehicle seat, which causes the operation to be cumbersome. Moreover, such components are easy to scatter and not easy to store, or need additional space for storage, which can cause the loss of related components and reduce the use and operation experience of the product. The embodiments of the present disclosure will be described below with reference to the relevant drawings. It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component and integrated with the other component, or a middle component can be present at the same time. The terms "mount", "one end", "the other end", and similar expressions used herein are only for the purpose of description.Referring to FIG. 28, an embodiment of the present disclosure provides a carrier N1 capable of being fixed to a vehicle seat N600. Specifically, FIG. 28 shows a perspective view of the carrier N1 fixed to the vehicle seat N600. The carrier N1 of the present disclosure can include a box body N100 for providing a space for a child or a pet to ride. The box body N100 includes a box body proper N110 and a bottom support N120 detachably connected to the box body proper N110. An outer surface of the box body N100 is covered with a cover, which can include at least one of cloth, plastic, PE, without being limited thereto. Specifically, the cover can include a body cover N101 covering an outer surface of the box body proper N110 and a bottom cover N102 covering an outer surface of the bottom support N120. The body cover N101 and the bottom cover N102 can be made of the same material or a combination of materials, or can be made of different materials or a combination of materials. The body cover N101 and the bottom cover N102 can be detachably connected, for example, by a zipper structure, a Velcro, a hook-and-loop assembly, or the like, without being limited thereto. In an embodiment, as shown in FIG. 28, the carrier N1 can include a fixing belt assembly N500. The fixing belt assembly N500 can be connected to the box body N100, for example, in a detachable or non-detachable manner, to fix the box body N100 to the vehicle seat N600. Optionally, at least a portion of the fixing belt assembly N500 can remain connected to the box body N100 when the carrier N1 of the present disclosure is not used. The fixing belt assembly N500 can include a first belt N510, a second belt N520, a first connection end N501, and a second connection end N502, wherein the first belt N510 and the second belt N520 can constitute a belt body of the fixing belt assembly N500, which is located between the first connection end N501 and the second connection end N502. One end of the first belt N510 constitutes the first connection end N501 of the fixing belt assembly N500, and a first connection device, for example, a hook or the like, is provided at the first connection end N501. In a specific example, the first connection device can be a Top Tether connection device to be connected to a top anchor point on the vehicle seat or a corresponding anchor point above the vehicle seat. The other end of the first belt N510 is connected to one end of the second belt N520.The other end of the second strap N520 constitutes a second connecting end N502 of the fixed strap assembly N500 and is detachably or non-detachably connected to the box body N100. For example, the second connecting end N502 can be connected to the bottom support N120, specifically, can be arranged at the side of the bottom support N120 away from the backrest of the vehicle seat, more specifically, can be arranged at the edge of the side of the bottom support N120. However, the disclosure is not limited thereto, and the connecting position of the second connecting end N502 of the fixed strap assembly N500 can be determined according to the specific structure and strength requirement of the box body N100. In other examples, the second connecting end N502 can also be connected to the box body N100. In an example, the fixed strap assembly N500 can be provided with two second connecting ends N502. For example, the second strap N520 can be composed of two strap members, one end of each of the two strap members is connected to each other, and the other end of each of the two strap members constitutes a second connecting end N502, respectively. In another example, the second strap N520 can be composed of one strap member, the strap member can pass through the connecting part between the first strap N510 and the second strap N520, and both ends of the strap member constitute a second connecting end N502, respectively. In addition, as shown in FIG. 28, a length adjuster N530 can be arranged between the first strap N510 and the second strap N520 to adjust the overall length of the fixed strap assembly N500. The length adjuster N530 can be arranged to adjust the length of the first strap N510, or to adjust the length of the second strap N520, or to adjust the length of both the first strap N510 and the second strap N520, but the disclosure is not limited thereto. When the carrier N1 is fixed to the vehicle seat N600, the first connecting end N501 of the fixed strap assembly N500 is connected to the top anchor point on the vehicle seat or the corresponding anchor point above the vehicle seat, at least a part of the strap body (for example, the second strap N520) is wound to the side of the box body N100 away from the backrest of the vehicle seat, and the second connecting end N502 is connected to the bottom support N120 of the box body N100, so as to fix the box body N100 to the vehicle seat N600. FIGS. 29 and 30 respectively show the top view of the carrier N1 shown in FIG. 28 in different use states, wherein FIG. 29 shows the carrier N1 in the left use state, and FIG. 30 shows the carrier N1 in the right use state.For ease of illustration and showing the specific structure of the bottom support N120, the bottom cover N102o covering the outside of the bottom support N120 of the box body is removed on the carrier N1 of FIGS. 29 and 30. With reference to FIGS. 28-30, in order to more stably fix the carrier N1 to the vehicle seat, the carrier of the present disclosure can also include an ISOFIX connecting component N200 for connecting with an ISOFIX interface provided on the vehicle seat N600 to fix the box body N100 to the vehicle seat N600. In an example, the ISOFIX connecting component N200 can be provided on the bottom support N120 of the box body N100 (obscured in FIG. 28, please refer to FIG. 29), specifically on the side of the bottom support N120 close to the backrest of the vehicle seat N600. As shown in FIG. 29, the ISOFIX connecting component N200 includes an engaging portion N210, a connecting portion N220, and a mounting portion N230. The engaging portion N210 is configured to engage with a corresponding matching structure on the vehicle seat N600 to achieve the fixation of the carrier N1 relative to the vehicle seat. For example, the engaging portion N210 of the present embodiment can engage with the ISOFIX interface provided on the vehicle seat N600. The engaging portion N210 can be provided on the side of the bottom support N120 close to the backrest of the vehicle seat N600 and extend outward from this side of the bottom support N120 to facilitate the installation of the box body N100 and the connection with the vehicle seat N600. With reference to FIGS. 29 and 30, the engaging portion N210 can be moved to different positions relative to the box body N100 to correspondingly engage with different positions of the vehicle seat. This will be specifically described below in connection with the connecting portion N220 and the mounting portion N230. The mounting portion N230 is connected to the box body N100, for example, fixedly connected (including detachable or non-detachable connection) to the bottom support N120 of the box body N100. In an example, the mounting portion N230 is a rod or tubular member, for example, a metal tube, configured to extend in the longitudinal direction ND1 (i.e., the length direction) of the box body N100. Optionally, the mounting portion N230 is provided at a position offset from the center line of the bottom support N120 in the transverse direction ND2 toward the side close to the backrest of the vehicle seat. For example, the two ends of the mounting portion N230 can be fixed to the bottom side of the bottom support N120 by fasteners, respectively.Referring to FIGS. 29 and 30, the connecting portion N220 is connected between the engaging portion N210 and the mounting portion N230, enabling the engaging portion N210 to move relative to the mounting portion N230. Specifically, one end of the connecting portion N220 is fixedly (i.e., non- movably) connected to the engaging portion N210, and the other end is movably connected to the mounting portion N230, thereby enabling the engaging portion N210 to move relative to the mounting portion N230. In the present embodiment, the connecting portion N220 is movable relative to the mounting portion N230 in the longitudinal direction ND1 of the box body N100, to adjust the position of the engaging portion N210 relative to the box body N100, thereby adapting the box body N100 to be secured to different positions of the vehicle seat N600. In addition, the connecting portion N220 is also pivotable relative to the mounting portion N230, e.g., about the mounting portion N230, to stow the engaging portion N210, as will be described below in connection with FIGS. 33A-34. In one embodiment, the mounting portion N230 is a round rod or tube, and at least a portion of the connecting portion N220 is sleeved on the mounting portion N230. As can be seen from FIGS. 28-30, when the carrier N1 is secured to either of the vehicle seats N600, the connecting portion N220 and the engaging portion N210 connected thereto can be disposed at a position offset toward the other vehicle seat on the bottom support N120. That is, as shown in FIG. 29, when the carrier N1 is secured to the left vehicle seat N600, i.e., in the left-side use state, the connecting portion N220 and the engaging portion N210 can be moved to the right-side engaging position in the longitudinal direction ND1 of the box body N100; and as shown in FIG. 30, when the carrier N1 is secured to the right vehicle seat N600, i.e., in the right-side use state, the connecting portion N220 and the engaging portion N210 can be moved to the left-side engaging position in the longitudinal direction ND1 of the box body N100. It should be noted that the "left" and "right" described above refer to the orientation when the carrier N1 is secured to the vehicle seat N600 as viewed from the front side of the carrier N1 (i.e., the side away from the backrest of the vehicle seat), and FIGS. 29 and 30 show top views as viewed from the bottom of the carrier N1 upward, so the "right-side engaging position" described above is shown on the left side in FIG. 29, and the "left-side engaging position" is shown on the right side in FIG. 30.In detail, as shown in FIG. 30, the connecting part N220 includes a slider N221 and a connecting member. The slider N221 is slidably connected to the mounting part N230, and optionally, the slider N221 is pivotable relative to the mounting part N230, for example, can be pivotally connected to the mounting part N230. In a specific example, the mounting part N230 can be in a circular tube shape, and the slider N221 can be formed as a circular sleeve that is sleeved outside the mounting part N230, so that the slider N221 can slide and pivot relative to the mounting part N230. The connecting member is connected between the engaging part N210 and the slider N221, for example, in a fixed connection manner, to drive the engaging part N210 to slide and / or pivot relative to the mounting part N230. In an example, the connecting member includes a synchronizer N222 and a connecting piece N223. The synchronizer N222 connects at least two engaging parts N210 together to make the at least two engaging parts N210 move synchronously. In the present embodiment, two engaging parts N210 can be provided, and the synchronizer N222 can be a rod member arranged in the longitudinal direction ND1 and connected between the two engaging parts N210, so that the two engaging parts N210 have the same length extending from the bottom support N120 and can move and / or pivot synchronously relative to the mounting part N230 (i.e., relative to the bottom support N120). As shown in FIG. 30, the connecting piece N223 is connected between the synchronizer N222 and the slider N221. In a specific example, the connecting piece N223 can be a rod member, and two ends of the rod member are respectively connected to the synchronizer N222 and the slider N221. As shown in FIG. 29, the ISOFIX connecting assembly of the present embodiment can further include a locking device N240 to lock and unlock the connecting part N220. The specific structure and working principle of the locking device N240 will be described below in combination with FIGS. 31A-32B. FIG. 31A shows a bottom view of the carrier shown in FIG. 29, and FIG. 31B shows a partial sectional view of part A shown in FIG. 31A. FIG. 32A shows a bottom view of the carrier shown in FIG. 30, and FIG. 32B shows a partial sectional view of part B shown in FIG. 32A. As shown in FIGS. 31A and 31B, the locking device N240 is arranged between the connecting part N220 and the mounting part N230 to lock and unlock the connecting part N220 to and from the mounting part N230.In one example, a portion of the locking device N240 can be fixedly arranged on the connecting portion N220 so as to be movable together with the connecting portion N220 and the engaging portion N210 relative to the mounting portion N230 and lock the two together at different engaging positions. However, the present disclosure is not limited thereto, and instead, a portion of the locking device N240 can be fixedly arranged on the mounting portion N230. In one specific example, the locking device N240 can include a housing N244. The housing N244 has an upper cover N2441 and a lower cover N2442 which are engaged with each other to form a receiving space for receiving other components of the locking device N240, such as the release operating member N241, at least a portion of the locking member N242 and the reset member N242 described below. The upper cover N2441 and the lower cover N2442 are fixedly connected to the connecting portion N220, such as a connecting member, more specifically to the connecting member N223, or to the synchronization member N222, or to both the synchronization member N222 and the connecting member N223, but the present disclosure is not limited thereto. Alternatively, or additionally, the synchronization member N222 can be arranged in spaced relation to the sliding member N221, such as arranged substantially parallel to and spaced apart from each other, and the two connecting members N223 are connected between the two and arranged in spaced relation to each other, and the receiving space formed by the locking device N240 is located in the space between the sliding member N221, the synchronization member N222 and the connecting members N223. In this example, the locking device N240 has a locked state and a released state. When the locking device N240 is in the locked state, the ISOFIX connecting assembly is locked, i.e. the connecting portion N220 and the engaging portion N210 connected thereto are locked relative to the mounting portion N230 (fixed to the box body N100), i.e. not movable and not rotatable. When the locking device N240 is in the released state, the ISOFIX connecting assembly is released, i.e. the connecting portion N220 and the engaging portion N210 connected thereto are movable and / or pivotable relative to the mounting portion N230. In combination with reference to FIGS. 31A-32B, the locking device N240 includes a release operating member N241 and a locking member N242. The locking member N242 is engageable with a corresponding locking portion provided on the mounting portion N230 to lock and release the connecting portion N220, i.e. has a locked position and a released position.When the locking member N242 is in the locked position, the locking member N242 engages with the corresponding locking portion, and the connecting portion N220 is locked relative to the mounting portion N230. When the locking member N242 is in the unlocked position, the locking member N242 disengages from the corresponding locking portion, and the connecting portion N220 can be unlocked relative to the mounting portion N230, i.e., can slide and / or rotate. The unlocking operation member N241 is operated to move the locking member N242 from the locked position to the unlocked position. The unlocking operation member N241 is fixedly connected with the locking member N242 and is slidably arranged relative to the mounting portion N230 to move together with the locking member N242 relative to the mounting portion N230. Specifically, the unlocking operation member N241 is slidably arranged in the mounting seat N244, i.e., arranged in the accommodating space formed by the upper cover N2441 and the lower cover N2442, and at least a portion thereof is exposed outside the mounting seat N244 for user operation. As shown in FIG. 31B, the mounting seat N244 has a generally U-shaped structure, i.e., the U-shaped structure has a notch at the upper end for exposing at least a portion of the unlocking operation member N241. In a specific example, the unlocking operation member N241 can be a button, but the present disclosure is not limited thereto, and can also be configured as a pull ring, a pull rod, etc. Further, as shown in FIGS. 31B and 32B, the locking device N240 further includes a restoring member N243. The restoring member N243 provides a force biasing the locking member N242 towards its locked position. Specifically, the restoring member N243 can be an elastic member, for example, a spring. One end of the restoring member N243 is arranged on the connecting portion N220 (for example, the synchronizing member N222 thereof) or the mounting seat N244, and the other end abuts against the unlocking operation member N241 and / or the locking member N242 to provide a force biasing the locking member N242 towards the locked position. For example, the locking member N242 can be a locking pin, and the corresponding locking portion arranged on the mounting portion N230 can be a locking hole, but the present disclosure is not limited thereto. When the unlocking operation member N241 is in the initial position, the locking member N242 is in the locked position, i.e., the locking pin (i.e., the locking member N242) engages with the corresponding locking hole, thereby locking the position of the connecting portion N220 and the clamping member N210 relative to the mounting portion N230, i.e., making them unable to move or rotate.When the ISOFIX connecting member (i.e., the sliding connecting portion N220) needs to be moved, the user can operate the release operating member N241, and the locking member N242 moves to the release position along with the movement of the release operating member N241, so that the locking pin is disengaged from the corresponding locking hole, thereby achieving release. At this time, the engaging portion N210 and the connecting portion N220 can be moved, and after the connecting portion N220 is moved to the desired position, the release operating member N241 can be released and restored to its original position under the action of the restoring member N243, and the locking pin is engaged with the corresponding locking hole at the desired position, so as to lock the connecting portion N220 again. As shown in FIGS. 31B and 32B, the locking portion can include multiple groups of locking portions. For example, in the embodiment, the locking portion includes a first locking portion N231 and a second locking portion N232. The first locking portion N231 and the second locking portion N232 can be respectively arranged at different positions of the mounting portion N230 in the longitudinal direction ND1, for example, near both ends of the mounting portion N230, so as to be able to lock the connecting portion N220 to different positions relative to the mounting portion N230. As shown in FIG. 31B, when the carrier N1 is in the left use state, the locking member N242 can cooperate with the first locking portion N231; and as shown in FIG. 32B, when the carrier N1 is in the right use state, the locking member N242 can cooperate with the second locking portion N232. Furthermore, as shown in FIGS. 30 and 31A, the carrier N1 also includes a reinforcing bracket N300 for reinforcing the strength of the entire structure of the bottom support member N120. The reinforcing bracket N300 is arranged on the bottom side of the bottom support member N120, and includes a first reinforcing rod N310 and a second reinforcing rod N320, and specifically, two second reinforcing rods N320 can be arranged. The first reinforcing rod N310 extends in the longitudinal direction ND1 of the box body N100, and is connected between the two second reinforcing rods N320. Alternatively, the two second reinforcing rods N320 are respectively arranged to extend in the transverse direction ND2 of the box body N100.In an example, the mounting portion N230 of the ISOFIX connection assembly N200 can be disposed between the two second reinforcing rods N320 and at one end of the second reinforcing rods N320, and the mounting portion N230 is spaced apart from the first reinforcing rod N320 in the transverse direction ND2, for example, near both sides of the bottom support N120 in the transverse direction ND2. Specifically, the two ends of the mounting portion N230 are connected to one end of the two second reinforcing rods N320 respectively, and the two ends of the first reinforcing rod N310 are connected to the other end of the two second reinforcing rods N320 respectively or near the other end. In an example, the other end of each second reinforcing rod N320 extends (i.e., continues to extend) from the connection point with the first reinforcing rod N310, that is, the other end of the second reinforcing rod N320 is not connected to the first reinforcing rod N310 at the end, but leaves an extension N321 at the end. Optionally, the second reinforcing rod N320 can have a non-linear structure at the extension N321, for example, an arc-shaped curve. Specifically, the extension N321 can be curved to match the arc-shaped structure at the side edge of the bottom support N120. In an example, as shown in FIGS. 31A and 31B, the ISOFIX connection assembly N200 is further provided with a limiting piece N340. The limiting piece N340 is disposed at the two ends of the mounting portion N230 to limit the connection portion N220, so as to prevent the connection portion N220 from being separated from the mounting portion N230. For example, the limiting piece N340 can be disposed at the connection point of the two second reinforcing rods N320 and the mounting portion N230. In this example, the limiting piece N340 can be a limiting sleeve that is sleeved outside the two ends of the mounting portion N230 (for example, a tubular piece). In addition, as shown in FIG. 32B, a wear-resistant structure N2210, for example, a wear-resistant sleeve that is sleeved inside the two ends of the sliding piece N221, can be disposed between the sliding piece N221 and the mounting portion N230 to improve the wear resistance and service life of the structure, and increase the connection tightness and the stability of the sliding connection therebetween. Referring to FIGS. 33A-34, FIG. 33A shows a bottom view of the carrier in the stowed state according to an embodiment of the present disclosure, FIG. 33B shows a partial sectional view of part C shown in FIG. 33A, and FIG. 34 shows another bottom view of the carrier shown in FIG. 33A.Referring to FIGS. 32A-33B, the connecting portion N220 of the present embodiment can pivot relative to the mounting portion N230 to accommodate the ISOFIX connecting assembly N200. Specifically, as shown in FIG. 32A, when the ISOFIX connecting assembly N200 is in a use state (i.e., an unfolded state), the engaging portion N210 and the connecting portion N220 are located outside the mounting portion N230 and extend from one side of the bottom support N120, where "inside" refers to a direction from the mounting portion N230 toward the center line of the bottom support N120, and "outside" refers to a direction from the mounting portion N230 toward the edge of the bottom support N120, i.e., opposite to "inside". As shown in FIG. 33A, when the ISOFIX connecting assembly is not in use, the connecting portion N220 can pivot relative to the mounting portion N230, for example, by 180 degrees, so that the connecting portion N220 and the engaging portion N210 are located inside the mounting portion N230, i.e., the connecting portion N220 is rotated in a direction opposite to the use state. At this time, the ISOFIX connecting assembly N200 is in an accommodation state. In an example, the mounting portion N230 is further provided with a third locking portion N233 for engaging with the locking piece N242 to lock the connecting portion N220 of the ISOFIX connecting assembly N200 in the accommodation state. The third locking portion N233 is arranged on the opposite side of the first locking portion N231 and the second locking portion N232. For example, in the present embodiment, the first locking portion N231 and the second locking portion N232 are arranged on the side of the mounting portion N230 close to the backrest of the vehicle seat N600 (i.e., the side from which the engaging portion N210 extends outwardly from the box body N100), and the third locking portion N233 is arranged on the opposite side, i.e., the side away from the backrest of the vehicle seat N600. In addition, as shown in FIGS. 33A and 33B, the box body N100 is further provided with an assembly accommodation groove N121 to provide an accommodation space for the ISOFIX connecting assembly N200.In an example, the component storage slot N121 can be arranged on the bottom support N120. Specifically, the component storage slot N121 can be arranged in the middle of the bottom support N120, for example, between the reinforcing bracket N300 and the mounting portion N230, and the third locking portion N233 can be arranged corresponding to the component storage slot N121, for example, in the middle of the mounting portion N230 away from the backrest of the vehicle seat N600. Alternatively, the component storage slot N121 can be arranged centrally on the bottom side of the bottom support N120 in the longitudinal direction ND1. The component storage slot N121 can have a shape matched with the ISOFIX connecting assembly. When the ISOFIX connecting assembly is not used, the connecting portion N220 and the engaging portion N210 connected thereto can be pivoted relative to the mounting portion N230 and simultaneously moved along the mounting portion N230 to the position of the third locking portion N233, so that the locking member N242 engages with the third locking portion N233 to lock the connecting portion N220. At this time, the ISOFIX connecting assembly can be accommodated in the component storage slot N121, thereby achieving storage. Wherein, the storage state of the ISOFIX connecting assembly please refer to FIG. 34. In addition, in addition to the storage structure of the ISOFIX connecting assembly described above, the box N100 of the present disclosure can also be provided with a storage and fixing structure for fixing the belt assembly N500. For example, as shown in FIG. 29, the bottom support N120 can be provided with a fixing belt storage slot N122, providing a space for accommodating the fixing belt assembly N500, so that the fixing belt assembly N500 can be stored while maintaining the connection with the box N100, and the fixing belt assembly N500 is prevented from scattering around the box N100. In an example, the fixing belt storage slot N122 is located on the side of the bottom support N120 away from the backrest of the vehicle seat N600. In combination with FIG. 34, the carrier N1 can also be provided with a storage cover N1021 for closing the fixing belt storage slot N122. Specifically, the storage cover N1021 can be detachably connected to the bottom cover N102 covering the outside of the bottom support N120, for example, by a zipper structure, magic tape, hook and loop assembly, etc.Optionally, the receiving cover N1021 can be part of the bottom cover N102, and at least a portion thereof is detachably connected to other portions of the bottom cover N102, but the present disclosure is not limited thereto. Further, as shown in FIG. 30, the bottom support N120 can further be provided with a belt fixing structure N330 for connecting at least a portion of the fixing belt assembly N500 to the bottom support N120. The belt fixing structure N330 is provided on a side of the bottom support N120 away from the backrest of the vehicle seat, and can be provided at an edge of the side, or at the extension N321 of the second reinforcing rod N320. The second connecting end N502 of the fixing belt assembly N500 can be connected to the belt fixing structure N330 to avoid the fixing belt assembly N500 (e.g., the second belt N520) from being accidentally detached from the box N100, and further increase the stability and firmness of the carrier N1 fixed to the vehicle seat. Optionally, the extension N321 matches the structure at the edge of the bottom support N120, so that the belt fixing structure N330 provided at the extension N321 is closer to, or even abuts against, the side of the bottom support N120, so that the overall structure of the bottom support N120, and the limiting of the fixing belt assembly, is more stable. In an example, the belt fixing structure N330 can include a fixing seat N331 and a fixing pin N332. The fixing seat N331 is provided at or near the edge of the side of the bottom support N120 away from the backrest of the vehicle seat, or at the extension N321 of the second reinforcing rod N320. The fixing pin N332 is provided in the fixing seat N331 and spaced from the bottom surface of the fixing seat N331, so that the second connecting end N502 of the fixing belt assembly N500 is wound around the fixing pin N332. In other examples, a corresponding connecting structure can also be provided at the second connecting end N502 to connect with the belt fixing structure N330, but the present disclosure is not limited thereto. By providing the ISOFIX connecting assembly of the present embodiment, the synchronous engagement of multiple engagement portions can be achieved when the box of the carrier is connected and fixed to the vehicle seat, i.e., multiple engagement portions do not need to be engaged one by one by separate operations, and after engagement, no adjustment can be made. Thus, not only is the connection and fixation of the carrier facilitated, but the engagement is also firm and not prone to loosening.Further, the ISOFIX connecting assembly of the present disclosure can be applied to multiple positions of the vehicle seat through a movable (i.e., slidable) connection, improving the convenience and user experience; and can be stored on the bottom side of the bottom support through pivoting, making the operation convenient, saving storage space, and avoiding the engagement portion of the ISOFIX connecting assembly from knocking against a person or other structures of the vehicle when the box body is lifted alone, thereby improving the safety in use. In addition, in the present disclosure, the box body is fixed to the vehicle seat through cooperation of the ISOFIX connecting assembly and the fixing belt assembly, further ensuring the reliability and stability of the fixation, so as to better ensure the safety of the person or pet in the box body and avoid injury when the box body is impacted. Referring to FIGS. 35-37, another embodiment of the present disclosure provides a carrier N1A. Specifically, FIGS. 35-37 respectively show perspective views of the carrier N1A in different use states, wherein FIG. 35 shows that the ISOFIX connecting assembly N200A is in a right side use state, FIG. 36 shows that the ISOFIX connecting assembly N200A is in a left side use state, and FIG. 37 shows that the ISOFIX connecting assembly N200A is in a middle position. Similar to the foregoing embodiment, the carrier N1A can also be fixed to the vehicle seat, for example, in the manner shown in FIG. 28 in which the carrier N1 is fixed to the vehicle seat N600. As shown in FIG. 35, the carrier N1A can include a box body N100A for providing a space for a child or pet to ride. The box body N100A includes a box body main body N110A and a bottom support N120A, which is detachably connected to the box body main body N110A. In an example, the bottom support N120A can be made of EPP, EPS, EPO, or the like, or a plastic plate, but the present disclosure is not limited thereto. The box body main body N110A can be covered with a main body cover N101A, and the bottom support N120A can be covered with a bottom cover N102A, wherein the main body cover N101A and the bottom cover N102A can each include at least one of cloth, plastic, PE, but the present disclosure is not limited thereto. The main body cover N101A and the bottom cover N102A can use the same material or material combination, or different materials or material combinations.The body cover N101A and the bottom cover N102A are detachably connected to each other, for example, by a chain structure, a Velcro, a hook-and-loop assembly, or the like. In an example, the body cover N101A can be partially detachably connected to the bottom cover N102A, that is, a part of the body cover N101A is detachably connected to the bottom cover N102A. In another example, the body cover N101A can be integrally detachably connected to the bottom cover N102A, that is, the body cover N101A can be integrally detached from the bottom cover N102A. In the present embodiment, the carrier N1A can include an ISOFIX connection assembly N200A for connection with an ISOFIX interface provided on a vehicle seat, so as to more stably and firmly fix the case body N100A to the vehicle seat. Specifically, the ISOFIX connection assembly N200A can be provided on the bottom support N120A of the case body N100A, for example, on a side of the bottom support N120A close to a backrest of the vehicle seat. More specifically, the ISOFIX connection assembly N200A can be provided on a bottom side of the bottom support N120A and has at least a part exposed outside to facilitate user operation. As can be seen in combination with FIGS. 35 and 36, similar to the foregoing embodiments, the ISOFIX connection assembly N200A in the present embodiment can include an engaging portion N210A, a connecting portion N220A, and a mounting portion N230A. The mounting portion N230A can be connected to the bottom support N120A of the case body N100A, for example, fixedly provided on a bottom side of the bottom support N120A in a detachable or non-detachable manner. In an example, both ends of the mounting portion N230A can be fixed on the bottom side of the bottom support N120A by fasteners, respectively. Alternatively, the mounting portion N230A can be configured as a rod or a tubular member, for example, a metal tube, extending in the longitudinal direction ND3 of the case body N100A. The engaging portion N210A can be configured to be provided on a side of the bottom support N120A close to the backrest of the vehicle seat and outwardly protrude from the side, for example, from the bottom side, of the bottom support N120A so as to engage with the ISOFIX interface of the vehicle seat. In an example, at least two engaging portions N210A can be provided.For example, in the present embodiment, a connecting portion N220A can be provided between the engagement portion N210A and the mounting portion N230A, and can move the engagement portion N210A relative to the mounting portion N230A. Specifically, one end of the connecting portion N220A is fixed (i.e., not movable relative to) to the engagement portion N210A, and the other end is movably connected to the mounting portion N230A, so that the engagement portion N210A can move, for example, slide or rotate, relative to the mounting portion N230A. For example, as shown in FIGS. 35 to 37, the connecting portion N220A can move relative to the mounting portion N230A in the longitudinal direction ND3 of the case N100A, so that the engagement portion N210A moves to different positions of the case N100A. In one example, the mounting portion N230A is biased toward the side closer to the vehicle seat back from the center line in the lateral direction ND4, so as to reduce the distance between the mounting portion N230A and the engagement portion N210A, reduce the size of the connecting portion N220A in the lateral direction ND4, thereby improving the stability and operability of the connecting portion N220A, while reducing the material cost. Unlike the foregoing embodiments, in the present embodiment, no locking device (specifically, for example, the first and second locking portions N231 and N232 of the locking device N240 and the corresponding mating structure thereof in the foregoing embodiments) that locks the engagement portion N210A at different use positions relative to the case N100A is provided, so that the connecting portion N220A and the mounting portion N230A remain movably connected when the carrier N1A is fixed using the ISOFIX connecting assembly N200A. Thus, by the movable connection between the connecting portion N220A and the mounting portion N230A, when the carrier N1A is fixed to the vehicle seat, for example, the engagement portion N210A of the ISOFIX connecting assembly N200A is connected to the corresponding interface on the vehicle seat, the engagement portion N210A and the connecting portion N220A are fixed relative to the vehicle seat, at which time the user can adjust the position of the case N100A relative to the vehicle seat. For example, the user can push the case N100A, so that the case N100A and the mounting portion N230A fixedly provided thereon move relative to the connecting portion N220A in the longitudinal direction ND3, so as to be adaptively moved to the desired position.In this way, the carrier N1A can not only be fixed to different positions of the vehicle seat, but also can be adaptively adjusted in its specific position after being fixed. Specifically, FIGS. 35-37 respectively show different use positions of the ISOFIX connecting assembly N200A relative to the box N100A, for example, FIG. 35 shows the leftmost position of the ISOFIX connecting assembly N200A (especially its connecting portion N220A and the engagement portion N210A), FIG. 36 shows the rightmost position of the ISOFIX connecting assembly N200A, and FIG. 37 shows the ISOFIX connecting assembly N200A in a middle position between the leftmost position and the rightmost position. Of course, it should be understood by those skilled in the art that, in addition to the middle position shown in FIG. 37, the ISOFIX connecting assembly N200A, specifically its connecting portion N220A and the engagement portion N210A, can also be in other middle positions between the leftmost position and the rightmost position, but the present disclosure is not limited thereto. It should be noted that the aforementioned “left” and “right” refer to the orientation shown in FIGS. 35-37. Specifically, the position of the ISOFIX connecting assembly N200A shown in FIG. 35 is similar to the position of the ISOFIX connecting assembly N200 when the carrier N1 is in the “right use state” shown in FIG. 30 in the foregoing embodiment, that is, it can be suitable for the carrier N1A to be fixed to the vehicle seat on the right side, so that the carrier N1A can slide to the left for position adjustment, but will not slide to the right side to cause a collision with the right door during driving; and the position shown in FIG. 36 is similar to the position of the carrier N1 in the “left use state” shown in FIG. 29 in the foregoing embodiment, that is, it can be suitable for the carrier N1A to be fixed to the vehicle seat on the left side, so that the carrier N1A can slide to the right for position adjustment, but will not slide to the left side to cause a collision with the left door during driving. Further referring to FIG. 37, similar to the foregoing embodiment, the connecting portion N220A of the present embodiment can include a sliding piece N221A and a connecting part. The sliding piece N221A is slidably connected to the mounting portion N230A, for example, specifically a sleeve (or a tubular structure) and is sleeved on the mounting portion N230A, so as to be capable of sliding relative to the mounting portion N230A.The connecting member is connected between the engaging portion N210A and the sliding member N221A so as to slide the engaging portion N210A relative to the mounting portion N230A along with the movement of the sliding member N221A. In an example, the connecting member can include a synchronizing member N222A and a connecting member N223A. The synchronizing member N222A is connected between at least two engaging portions N210A so as to synchronize the movement of the at least two engaging portions N210A. For example, in the present embodiment, two engaging portions N210A can be provided, and the two ends of the synchronizing member N222A can be connected to one end of each of the engaging portions N210A, respectively, wherein the other end of each of the engaging portions N210A opposite to the one end is connected to a corresponding interface of the vehicle seat, respectively. The connecting member N223A can be provided between the synchronizing member N222A and the sliding member N221A, for example, and both ends of the connecting member N223A are fixedly connected to the synchronizing member N222A and the sliding member N221A, respectively. In an example, the connecting member N223A can be configured as two or more rods arranged substantially in parallel between the synchronizing member N222A and the sliding member N221A, and both ends of each of the rods are connected to the synchronizing member N222A and the sliding member N221A, respectively. Optionally, the connecting member (i.e., the synchronizing member N222A and the connecting member N223A) can be a one-piece structure. Optionally or alternatively, two or all of the sliding member N221A, the synchronizing member N222A, and the connecting member N223A can be a one-piece structure or separate structures fixedly connected to each other. Furthermore, the sliding member N221A can also be pivotable relative to the mounting portion N230A. Specifically, FIG. 38 shows a perspective view of the carrier N1A in the stowed state. In combination with reference to FIGS. 37 and 38, the connecting portion N220A of the present embodiment can be pivotable relative to the mounting portion N230A so as to stow the ISOFIX connecting assembly N200A. Accordingly, the housing N100A is provided with an assembly stowing slot N121A to provide a stowing space for accommodating the ISOFIX connecting assembly N200A. As shown in FIGS. 35 to 37, when the ISOFIX connecting assembly N200A is in the use state, the end of the engaging portion N210A that is engaged with the corresponding interface of the vehicle seat (i.e., the “other end” described above) extends out of one side of the bottom support N120A, and the engaging portion N210A and the connecting portion N220A are located outside the mounting portion N230A.Further combining FIG. 37 and FIG. 38, when the carrier N1A is not needed to be used, the connecting portion N220A can slide along the mounting portion N230A, thereby moving the engaging portion N210A to a position corresponding to the component storage groove N121A, and then the connecting portion N220A (and the engaging portion N210A) is pivoted relative to the mounting portion N230A, for example, pivoted by N180 degrees to make the engaging portion N210A and the connecting portion N220A located at the inner side of the mounting portion N230A, so that the ISOFIX connecting component N200A is stored in the component storage groove N121A. In an example, the component storage groove N121A can be provided on the bottom support N120A, for example, the bottom side of the bottom support N120A. It should be noted that the component storage groove N121A shown in FIG. 37 is provided at the middle portion of the bottom side of the bottom support N120A (i.e., centrally provided on the bottom side of the bottom support N120A), but the present disclosure is not limited thereto, and the component storage groove N121A can also be provided at a position shifted from the middle portion in the longitudinal direction ND3. As shown in FIG. 37 and FIG. 38, the carrier N1A of the present embodiment is also provided with a locking mechanism N400A for keeping the ISOFIX connecting component N200A in its storage state o. Specifically, the locking mechanism N400A can be provided on the bottom support N120A of the box body N100A, and can lock the connecting portion N220A to keep the ISOFIX connecting component N200A in the component storage groove N121A. In an example, the locking mechanism N400A can be provided at the edge of the component storage groove N121A. Specifically, when the ISOFIX connecting component N200A is stored in the component storage groove N121A (i.e., in the storage state), the locking mechanism N400A can be provided at the edge of the component storage groove N121A close to the synchronization piece N222A, and can lock the synchronization piece N222A of the connecting portion N220Ao. However, it should be understood that the locking mechanism N400A of the present disclosure is not limited to the above position, and can also be provided close to and lock the sliding piece N221A and / or the connecting piece N223A of the connecting portion N220A, and can also be provided close to and lock the engaging portion N210A, as long as the ISOFIX connecting component N200A can be kept in the component storage groove N121A.Further combining FIG. 39A and FIG. 39B, FIG. 39A shows a partial enlarged view of the E portion shown in FIG. 38, and FIG. 39B shows a partial cross-sectional view taken along the line F-F in FIG. 39A, to show the specific structure of the locking mechanism N400A. In the present embodiment, the locking mechanism N400A can include a connecting seat N410A and a locking piece N420A. The connecting seat N410A can be fixedly provided on the bottom support N120A. For example, an upper surface N411A of the connecting seat N410A can be provided with a mounting hole N412A through which a fastener such as a screw is passed to connect with the bottom support N120A, thereby fixedly connecting the connecting seat N410A to the bottom support N120A. The locking piece N420A is provided on the connecting seat N410A at a side close to the connecting portion N220A, for example, at a side surface of the connecting seat N410A close to the synchronizing piece N222A when the ISOFIX connecting assembly is in the stowed state. In an example, as shown in FIG. 39B, the locking piece N420A can be a locking buckle, for example, a reverse buckle protruding from a side of the connecting seat N410A (i.e., a side close to the connecting portion N220A), which can be in interference fit with the connecting portion N220A (specifically, the synchronizing piece N222A) to lock the ISOFIX connecting assembly N200A, that is, to keep the ISOFIX connecting assembly N200A in the locked state in the assembly stowing groove N121A. When the ISOFIX connecting assembly N200A needs to be used, the connecting portion N220A can be pulled to rotate relative to the mounting portion N230A and to pass the locking buckle, thereby achieving the release of the lock. Optionally, the locking buckle can be made of plastic, but the present disclosure is not limited thereto. In another example, the locking piece N420A can also be a spring piece (not shown in the figure) provided protruding from a side of the connecting seat N410A. When the ISOFIX connecting assembly N200A is stowed (i.e., stowed in the assembly stowing groove N121A), at least a portion of the connecting portion N220A (such as the synchronizing piece N222A in the present embodiment) can press against the spring piece to deform the spring piece, thereby being locked between the spring piece and the bottom support N120A.When the ISOFIX connection assembly N200A is to be used, the synchronizer N222A can be pivoted relative to the mounting portion N230A and moved away from the space between the elastic piece and the bottom support N120A, thereby achieving release. In addition, in another example, the locking piece N420A can also be an elastic protrusion (not shown in the figure) provided on the bottom support, and the synchronizer N222A is correspondingly provided with a groove, and the locking of the ISOFIX connection assembly N200A is achieved by the cooperation between the elastic protrusion and the groove. It should be understood that the positions of the protrusion and the groove in this example can be interchanged. Of course, the locking piece N420A of the present disclosure is not limited to the above structure, and it can also have other structures of hard or soft materials, as long as it can achieve the limiting and / or locking of the ISOFIX connection assembly N200A (for example, the connecting portion N220A thereof). FIG. 40 shows another perspective bottom view of the carrier N1A shown in FIG. 38, in order to more clearly show the structure in the bottom support N120A, the bottom cover N102Ao is removed here. Specifically, the ISOFIX connection assembly N200A and the fixing belt assembly N500A of the carrier N1A shown in FIG. 40 are both in the storage state. FIG. 41A shows another perspective bottom view of the carrier N1A, in which the ISOFIX connection assembly N200A and the fixing belt assembly N500A are both in the use state (i.e., the unfolded state), and FIG. 41B shows a partial sectional view taken along the line G-G in FIG. 41A. In combination with reference to FIG. 40 and FIG. 41A, the carrier N1A can include the fixing belt assembly N500A, at least a part of the fixing belt assembly N500A can be fixedly connected to the box body N100A or the ISOFIX connection assembly N200A provided at the bottom of the box body N100A in a detachable or non-detachable manner, for fixing the box body N100A to the vehicle seat. That is, at least a part of the fixing belt assembly N500A remains connected to the box body N100A when not in use or in use.In detail, the fixing strap assembly N500A can include a strap body composed of a first strap N510A and a second strap N520A, and a first connecting end N501A and a second connecting end N502A. One end of the first strap N510A constitutes the first connecting end N501A of the fixing strap assembly N500A and is provided with a first connecting device, for example, a Top Tether connecting device, for connecting with a top anchor point on a vehicle seat or a corresponding anchor point above the vehicle seat. The other end of the first strap N510A is connected with one end of the second strap N520A, and the other end of the second strap N520A constitutes the second connecting end N502A and is fixedly connected to the box body N100A or the ISOFIX connecting assembly N200A. Optionally, the fixing strap assembly N500A can be provided with two second connecting ends N502A. In addition, the second strap N520A of the present embodiment can have a structure similar to that of the foregoing embodiments, and the fixing strap assembly N500A can also be provided with a length adjuster N530A similar to that of the foregoing embodiments, which will not be described here. Different from the foregoing embodiments shown in FIGS. 28-30, in the present embodiment, the two second connecting ends N502A of the fixing strap assembly N500A can be connected to the mounting portion N230A of the ISOFIX connecting assembly N200A, and the strap body is wound from a side of the bottom support N120A opposite to the side provided with the clamping portion N210A to the top of the box body N100A, and then connected to the vehicle or the vehicle seat above the box body N100A through the first connecting end N501A, so as to fix the box body N100A to the vehicle seat. As can be seen from FIGS. 35, 36 and 41A, the connection positions of the two second connecting ends N502A with the mounting portion N230A are respectively located outside the sliding stroke of the sliding member N221A of the connecting portion N220A relative to the mounting portion N230A, so as to avoid the interference between the fixing strap assembly N500A and the sliding member N221A. For example, the two connection positions can be symmetrically located outside the two ends of the sliding stroke. In an example, limit members (not shown) can be provided at the two ends of the mounting portion N230A to limit the connecting portion N220A, so as to prevent the connecting portion N220 from interfering with the fixing strap assembly N500A and from being detached from the mounting portion N230A.In detail, the limiting member can be located between the second connecting end N502A of the fixing belt assembly N500A and the connecting portion N220A. As shown in FIGS. 40 and 41A, the carrier N1A can further be provided with a fixing belt receiving slot N122A, which provides space for receiving the fixing belt assembly N500A, so that the fixing belt assembly N500A can be received while maintaining connection with the ISOFIX connecting assembly N200A, avoiding the fixing belt assembly N500A from being scattered around the box N100A. In an example, the fixing belt receiving slot N122A can be provided on the side of the bottom support N120A away from the backrest of the vehicle seat. Furthermore, in combination with FIGS. 38 and 40, the carrier N1A can further be provided with a receiving cover N1021A for closing the fixing belt receiving slot N122A. Optionally, the receiving cover N1021A is detachably connected to the bottom cover N102A covering the outside of the bottom support N120A, or is at least a part of the bottom cover N102A and is detachably connected to the other part of the bottom cover N102A. The above-mentioned detachable connection can be in the form of a zipper structure, a magic tape, a hook-and-loop assembly, etc., but the present disclosure is not limited thereto. In an example, the fixing belt receiving slot N122A can be centrally provided on the side of the bottom support N120A away from the backrest of the vehicle seat, but the present disclosure is not limited thereto, and it can also be provided at other positions of the bottom support N120A without interfering with the assembly receiving slot N121A. As shown in FIG. 40, when the fixing belt assembly N500A is not needed to be used to fix the box N100A, the first connecting end N501A of the fixing belt assembly N500A and the part of the belt body connected thereto can be received in the fixing belt receiving slot N122A while the second connecting end N502A of the fixing belt assembly N500A maintains connection with the ISOFIX connecting assembly N200A. In a specific example, the first connecting end N501A and a part of the first belt N510A, and optionally the second belt N520A, are received in the fixing belt receiving slot N122A. Referring to FIGS. 41A and 41B, the box N100A can further be provided with a support leg N123A.Supporting legs N123A can be arranged on the bottom side of the bottom support N120A for supporting the box body N1000A. In an example, as shown in FIG. 41A, the supporting legs N123A can be arranged at both ends of the bottom support N120A in the longitudinal direction ND3. Specifically, the bottom support N120A can be provided with a recess structure for mounting the ISOFIX connecting assembly N200A, in particular the mounting portion N230A thereof. The supporting legs N123A are arranged above at least a portion of the recess structure so as to limit both ends of the mounting portion N230A in the recess structure. In the present example, as shown in FIG. 41B, the supporting legs N123A can be fixed to the bottom support N120A by fasteners, and optionally, the fastener located at one end of the supporting leg N123A can pass through the end of the supporting leg N123A and one end of the mounting portion N230A in sequence, and fix the supporting leg N123A and the mounting portion N230A together to the bottom support N120A, but the present disclosure is not limited thereto, and the supporting leg N123A and / or the ISOFIX connecting assembly N200A can also be fixed by other manners. By arranging the ISOFIX connecting assembly of the present embodiment, the box body of the luggage can be fixed to different positions of the vehicle seat, and it is not necessary to separately operate multiple engagement portions to engage them one by one. At the same time, the position of the box body in the longitudinal direction thereof can also be adjusted adaptively after the box body is fixed, improving the convenience of use and user experience. In addition, the ISOFIX connecting assembly of the present embodiment can be suitable for multiple positions of the vehicle seat through movable (i.e. slidable) connection, and can be accommodated on the bottom side of the bottom support through pivoting, so that the operation is convenient, the accommodation space is saved, and the engagement portion of the ISOFIX connecting assembly is prevented from knocking against a person or other structures of the vehicle when the box body is lifted alone, thereby improving the safety in use. In addition, the box body is fixed to the vehicle seat through the cooperation of the ISOFIX connecting assembly and the fixing belt assembly in the present disclosure, further ensuring the reliability and stability of the fixation, so as to better ensure the safety of the person or pet in the box body, and avoid injury when the box body is subjected to impact.It should be noted that the structures in the above two embodiments of the present disclosure can be combined or replaced, for example, in the case where the structures do not conflict, the locking mechanism can be arranged in the embodiment shown in FIG. 29, and the reinforcing support can also be arranged in the embodiment shown in FIG. 35, and the present disclosure is not limited thereto. The technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present disclosure. The above embodiments only express several implementation modes of the present disclosure, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the disclosed patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present disclosure, a number of modifications and improvements can be made, which are within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent should be subject to the appended claims.

Claims

CLAIM 1. A securement strap assembly for securing a load to a vehicle seat, characterized by, The carrier includes a box body and a bottom support member detachably connected to the box body and disposed below the box body, and the fixing belt assembly is configured to be connected to the carrier, and at least a portion of the fixing belt assembly is capable of being accommodated in an accommodation space of the carrier.

2. The fastening tape assembly according to claim 1, characterized in that, The fixing belt assembly includes: a first belt assembly, at least a portion of the first belt assembly is wound from a side of the carrier away from a backrest of the vehicle seat to a bottom of the carrier, and an end of the first belt assembly is provided with a first connecting device connected to a top of the vehicle seat; a second belt assembly disposed at the bottom of the carrier, one end of the second belt assembly is connected to the other end of the first belt assembly, and the other end of the second belt assembly is provided with a second connecting device connected to the vehicle seat, so that the carrier is fixed to the vehicle seat.

3. The fixing belt assembly according to claim 2, characterized in that The bottom support member is provided with a fixing belt limiting structure configured to position the fixing belt assembly so that the fixing belt assembly is at least partially connected to the carrier.

4. The fixing belt assembly according to claim 3, characterized in that The carrier further includes: a reinforcing bracket disposed on a bottom side of the bottom support member, wherein the fixing belt limiting structure is disposed on the reinforcing bracket.

5. The fixing belt assembly according to claim 3, characterized in that The fixing belt limiting structure includes two first limiting structures and two second limiting structures, and a distance between the two second limiting structures is greater than or equal to a distance between the two first limiting structures.

6. The fastening tape assembly according to claim 3, wherein The fixing belt limiting structure includes: a first tubular structure having a length extending along a longitudinal axis of the bottom support member; and a second tubular structure disposed to cross the first tubular structure; wherein the first tubular structure, or the second tubular structure, or the first tubular structure and the second tubular structure form a threading gap for the fixing belt assembly to pass through. 69 The first tubular structure and the second tubular structure are disposed substantially perpendicular to each other; or at least a portion of the second tubular structure is inclined with respect to a longitudinal axis and a transverse axis of the carrier, so that a distance between first ends of two second tubular structures of the two fixing belt limiting structures is less than a distance between second ends of the two second tubular structures.

7. The securement band assembly of claim 6, wherein, The carrier includes the fixing belt assembly according to any one of claims 1 to 7.

8. A carrier, characterized by, ​ 9. A connection fixture for securing a carrier to a vehicle seat, characterized in that The connecting and fixing device comprises: a first belt connecting component and a second belt connecting component, one end of the first belt connecting component constitutes a first connecting end of the connecting and fixing device, the other end of the first belt connecting component is connected to one end of the second belt connecting component, and the other end of the second belt connecting component constitutes a second connecting end of the connecting and fixing device, the first connecting end is connected to a first anchoring point, at least a part of the connecting and fixing device is arranged from a side of a backrest of the vehicle seat away from the vehicle to below the vehicle, so that the second connecting end is connected to a second anchoring point; a buffer structure arranged on the connecting and fixing device.

10. The connecting fixture according to claim 9, characterized in that The buffer structure comprises at least one buffer belt, two ends of the at least one buffer belt are connected to the connecting and fixing device through a first fixing member and a second fixing member respectively.

11. The attachment device of claim 10, wherein the at least one protrusion is configured to engage the at least one recess. An initial effective length of the buffer belt between the first fixing member and the second fixing member is less than an initial effective length of the connecting and fixing device between the first fixing member and the second fixing member.

12. The connecting fixture according to claim 10 or 11, characterized in that An extension rate of the buffer belt is greater than an extension rate of the connecting and fixing device provided with the buffer belt.

13. The connecting fixture according to claim 10 or 11, characterized in that The buffer structure comprises at least one first knot point, the at least one first knot point is arranged on the connecting and fixing device and located between the first fixing member and the second fixing member.

14. The connection fixture according to claim 10 or 11, characterized in that At least one second knot point is arranged on the buffer belt, 70 When the at least one second knot point is released, a buffer effective length of the buffer belt between the first fixing member and the second fixing member is greater than an effective length of the connecting and fixing device between the first fixing member and the second fixing member, and an extension rate of the buffer belt is less than an extension rate of the connecting and fixing device provided with the buffer belt.

15. A connection fixture for securing a carrier to a vehicle seat, characterized by The connection fixing device has a first connection end and a second connection end connected to the first anchoring point and the second anchoring point respectively, at least a part of the connection fixing device is arranged on a side of the vehicle seat away from a backrest of the vehicle seat, the connection fixing device comprises a first belt connection assembly and a second belt connection assembly which are detachably connected to each other, the first belt connection assembly comprises a first belt structure and a second belt structure, wherein the first belt structure and the second belt structure are alternatively used and detachably connected to the second belt connection assembly, and wherein the first belt structure and the second belt structure have different elongation rates.

16. The connecting fixture according to claim 15, characterized in that The first belt structure comprises a first belt body and a first end and a second end respectively located at two ends of the first belt body, when the first belt structure is connected to the second belt connection assembly, the first end of the first belt structure constitutes the first connection end of the connection fixing device, and the second end is detachably connected to the second belt connection assembly; the second belt structure comprises a second belt body and a first end and a second end respectively located at two ends of the second belt body, when the second belt structure is connected to the second belt connection assembly, the first end of the second belt structure constitutes the first connection end of the connection fixing device, and the second end is detachably connected to the second belt connection assembly; and the second end of the second belt connection assembly constitutes the second connection end.

17. The attachment device of claim 15, wherein the at least one protrusion is configured to engage the at least one recess. The elongation rate of the first belt structure is greater than the elongation rate of the second belt structure, when the first anchoring point is closer to the vehicle, the first belt structure is connected to the second belt connection assembly; and when the first anchoring point is farther away from the vehicle, the second belt structure is connected to the second belt connection assembly.

18. The connection fixing device according to any one of claims 15 to 17, characterized in that, 71 A buffer structure is arranged on at least one of the first belt structure, the second belt structure and the second belt connection assembly.

19. A carrier, c h a r a c t e r i s e d in that The vehicle is fixed to a vehicle seat by the connection fixing device according to any one of claims 9 to 18.

20. An ISOFIX connection assembly for securing a box of a child seat to a vehicle seat, characterized in that the ISOFIX connection assembly comprises: A clamping portion connected to an ISOFIX interface arranged on the vehicle seat; a mounting portion fixedly connected to the box body; and a connecting portion fixedly connected to the clamping portion and movably connected to the mounting portion to drive the clamping portion to move relative to the mounting portion.

21. ISOFIX connection set according to claim 20, characterized in that The connecting portion includes: a slider pivotably connected to the mounting portion in a slidable manner; and a connecting member connected between the engaging portion and the slider to drive the engaging portion to slide and / or pivot relative to the mounting portion.

22. The ISOFIX connection assembly according to claim 21, characterized in that The ISOFIX connecting assembly is provided with at least two engaging portions; and the connecting member includes: a synchronizer connecting the at least two engaging portions together to synchronize operation of the at least two engaging portions; and a connecting piece connected between the synchronizer and the slider.

23. ISOFIX connection assembly according to any one of claims 20 to 22, characterized in that The ISOFIX connecting assembly further includes: a locking device provided between the connecting portion and the mounting portion to lock and release the connecting portion to and from the mounting portion.

24. The ISOFIX connection assembly of claim 20, characterized in that, The mounting portion is provided with a locking portion including a first locking portion and a second locking portion, the first and second locking portions being provided at different positions of the mounting portion along a longitudinal direction of the box body to enable the connecting portion to be locked to different positions relative to the mounting portion. 72 The connecting portion is pivotable relative to the mounting portion to enable the connecting portion and the engaging portion to be accommodated in the box body, and the locking device further includes a locking piece engageable with the locking portion, the locking portion further including a third locking portion provided at an opposite side of the first and second locking portions to engage with the locking piece to lock the accommodated connecting portion.

25. The ISOFIX connection assembly of claim 24, characterized in that, The connecting portion is pivotable relative to the mounting portion to enable the connecting portion and the engaging portion to be accommodated in the box body, and the box body is provided with a locking mechanism to lock the accommodated connecting portion.

26. The ISOFIX connection assembly according to any one of claims 20 to 22, characterized in that The carrier includes: a box body providing a containing space and including: a box body proper; and a bottom support member detachably connected to the box body proper, wherein the ISOFIX connecting assembly according to any one of claims 20 to 26 is provided on the bottom support member.

27. A carrier, c h a r a c t e r i s e d in that The bottom support member is provided with an assembly receiving slot providing a receiving space for receiving the ISOFIX connecting assembly.

28. The vehicle of claim 27, wherein: The bottom support member is provided with a locking mechanism to lock a connecting portion of the ISOFIX connecting assembly when the ISOFIX connecting assembly is received in the assembly receiving slot to enable the ISOFIX connecting assembly to be retained in the assembly receiving slot.

29. The vehicle of claim 28, wherein, ​ 30. The vehicle of claim 27, wherein: The carrier further comprises a fixing belt assembly connected to the box body for fixing the box body to the vehicle seat, and comprising a belt body, a first connecting end and a second connecting end, the belt body being located between the first connecting end and the second connecting end, the first connecting end being connected to the vehicle seat, at least a part of the belt body being wound to a side of the box body away from a backrest of the vehicle seat, and the second connecting end being connected to the bottom support or the 73 ISOFIX connecting assembly.

31. The vehicle of claim 30, wherein: The bottom support is provided with a belt fixing structure for connecting at least a part of the fixing belt assembly to the bottom support, the belt fixing structure being arranged at a side of the bottom support away from the backrest of the vehicle seat, and the second connecting end of the fixing belt assembly being connected to the belt fixing structure. 74

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