Isofix structure and child safety seat

Abstract

The application provides an ISOFIX structure and a child safety seat, and relates to the technical field of child safety seats. The ISOFIX structure comprises a base sleeve and a shell extending in a first direction. The base sleeve is sleeved outside the shell and can move relative to the shell in the first direction. In the first direction, a plurality of interval arranged gear holes are arranged on the outer wall of the shell, and a resilient locking pin assembly is arranged on the base sleeve. The resilient locking pin assembly comprises a gear pin and a resilient reset member connected with the gear pin. The gear pin can be inserted into the gear hole, and the resilient reset member is used for enabling the gear pin to have a tendency to move into the gear hole. A release structure is arranged in the shell, and the release structure is used for pushing the gear pin to the outside of the shell.

Description

Technical Field

[0001] This invention relates to the field of child safety seat technology, and in particular to an ISOFIX structure and a child safety seat. Background Technology

[0002] ISOFIX refers to a system for connecting a child restraint system to a vehicle. It includes two rigid connection points on the vehicle, two corresponding rigid connection devices on the child restraint system, and an anti-rollover method (such as top restraint anti-rollover and support foot anti-rollover). It is a new standard for the placement of child seats in cars. This standard is being adopted by many car manufacturers.

[0003] The existing ISOFIX component structure for child safety seats includes a housing and a sleeve, with the sleeve fitted over the outside of the housing and movable along its length. The sleeve has multiple shift holes spaced apart along its length; the housing contains locking teeth for connection to vehicle anchor points, an unlocking assembly for driving the locking teeth, and a shifting assembly for engaging with the shift holes.

[0004] In the existing technology, too many parts are set inside the housing. On the one hand, this will increase the volume of the housing, which in turn will increase the volume of the sleeve that slides on the outside of the housing, affecting the arrangement of the seat. On the other hand, in order to reduce the volume of the housing, the many parts inside the housing are arranged compactly. When the vehicle body vibrates, adjacent parts will interfere with each other and collide, which will lead to damage to the parts. Summary of the Invention

[0005] The purpose of this invention is to provide an ISOFIX structure and a child safety seat to alleviate the technical problems of existing ISOFIX structures being bulky and easily damaged.

[0006] In a first aspect, an ISOFIX structure provided by an embodiment of the present invention includes: a base sleeve and a housing extending along a first direction, wherein the base sleeve is sleeved on the outside of the housing and is movable relative to the housing along the first direction;

[0007] Along the first direction, the outer wall of the housing is provided with a plurality of spaced-apart gear holes, and the base sleeve is provided with an elastic locking pin assembly. The elastic locking pin assembly includes a gear pin and an elastic reset member connected to the gear pin. The gear pin can be inserted into the gear hole, and the elastic reset member is used to make the gear pin have a tendency to move into the gear hole.

[0008] The housing is provided with a release mechanism, which is used to push the gear pin to the outside of the housing.

[0009] Furthermore, the sidewall at the top of the gear pin has a first guide slope and a second guide slope facing the latch end and the tail end of the housing, respectively. Along the direction from the latch end of the housing to the tail end, the first guide slope is inclined to the inside of the housing, and the second guide slope is inclined to the outside of the housing.

[0010] The release structure has a plurality of concave and convex structures on the side facing the gear hole, which correspond one-to-one with the gear hole; along the direction from the latch end to the tail end of the housing, the concave and convex structures include protrusions and depressions arranged in sequence.

[0011] The release structure is movable relative to the housing in a first direction so that the protrusion or recess aligns with the corresponding gear hole; when the protrusion aligns with the gear hole and the top of the gear pin abuts against the top surface of the protrusion, the outer edges of the first guide slope and the second guide slope are both located outside the gear hole in the inward and outward directions of the gear hole.

[0012] Furthermore, the protrusion has a third guide slope on the side facing the tail end of the housing, which has the same inclination direction as the first guide slope. When the release structure moves toward the tail end of the housing, the third guide slope is used to slide in contact with the first guide slope and push the shift pin toward the outside of the shift hole to the top end face of the protrusion.

[0013] Furthermore, when the recess on the release structure is aligned with the gear position hole, and the top of the gear position pin abuts against the bottom surface of the recess, along the inward and outward directions of the gear position hole, the outer edge of the first guide slope is located outside the gear position hole, and the outer edges of the second guide slope are both located inside the gear position hole.

[0014] Furthermore, the locking teeth are provided with a first abutting portion and a second abutting portion arranged in its circumferential direction. The first abutting portion is used to abut against the release structure when the locking teeth are in the open state, and to position the release structure relative to the housing in a first position. When the release structure is in the first position, the stop hole is aligned with the recess. The second abutting portion is used to abut against the release structure when the locking teeth are in the engaged state, and to position the release structure relative to the housing in a second position. When the release structure is in the second position, the stop hole is aligned with the recess, and the release structure located in the second position is closer to the locking end of the housing than the release structure located in the first position.

[0015] A lifting boss is provided in the recess of the concave-convex structure closest to the tail end of the housing. Along the direction from the latch end of the housing towards the tail end, a gap is formed between the protrusion of the concave-convex structure closest to the tail end of the housing and the lifting boss to accommodate the stop pin. The side of the lifting boss facing the latch end of the housing has a fourth guide slope.

[0016] When the locking teeth change from the open state to the engaged state, the fourth guide slope is used to slide in contact with the second guide slope of the gear pin and push the gear pin to move outward of the gear hole to the top surface of the lifting boss; when the top of the gear pin abuts against the top surface of the lifting boss, the outer edge of the first guide slope is located outside the gear hole, and the outer edges of the second guide slope are both located inside the gear hole.

[0017] Furthermore, the first abutment and the second abutment have a stepped structure. When the locking teeth are in the engaged state, the end of the release structure near the locking nozzle is engaged in the stepped structure. The first abutment is used to prevent the locking teeth from rotating relative to the housing.

[0018] Furthermore, the elastic locking pin assembly includes a guide sleeve, and the wall of the base sleeve is provided with a through hole communicating with the inside and outside. The guide sleeve is connected to the outer wall of the base sleeve and the opening of the guide sleeve is aligned with the through hole.

[0019] The gear shift pin is slidably connected inside the guide sleeve, and the elastic reset member is located between the bottom of the guide sleeve and the bottom of the gear shift pin.

[0020] Secondly, an embodiment of the present invention provides a child safety seat including the aforementioned ISOFIX structure.

[0021] The ISOFIX structure provided in this embodiment of the invention has a release mechanism inside its housing, which is used to push the shift pin outward from the housing. Sliding the base sleeve on the housing allows the shift pin on the base sleeve to be inserted into the shift hole, enabling adjustment of different shift positions. The release mechanism unlocks the shift pin. Unlike existing technologies, the ISOFIX structure provided in this embodiment does not have its elastic locking pin assembly inside the housing, but rather on the base sleeve. Reducing the number of components inside the housing allows for a smaller overall volume of the housing, thus reducing the size of the ISOFIX structure and meeting more assembly requirements. Furthermore, removing the elastic locking pin assembly from the housing reduces the number of parts inside, facilitating the arrangement of other components and reducing the risk of interference between parts.

[0022] The child safety seat provided in this embodiment of the invention includes the ISOFIX structure described above. Because the child safety seat provided in this embodiment of the invention utilizes the ISOFIX structure, it also possesses the advantages of the ISOFIX structure. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the ISOFIX structure provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the ISOFIX structure after removing the base sleeve, as provided in an embodiment of the present invention.

[0026] Figure 3 A schematic diagram of the interior of the housing of the ISOFIX structure provided in an embodiment of the present invention;

[0027] Figure 4 An exploded view of the ISOFIX structure provided in an embodiment of the present invention;

[0028] Figure 5 A cross-sectional view of the base sleeve of the ISOFIX structure provided in an embodiment of the present invention;

[0029] Figure 6 A top-view schematic diagram of the internal structure of the ISOFIX structure in its initial state, as provided in an embodiment of the present invention.

[0030] Figure 7 for Figure 6 A schematic diagram of the internal structure viewed from the front in the current state;

[0031] Figure 8 for Figure 6 A magnified view of a portion of position A in the middle;

[0032] Figure 9 A top view of the internal structure of the ISOFIX structure provided in this embodiment of the invention, with the locking teeth in the open state and the release structure pulled;

[0033] Figure 10 for Figure 9 A schematic diagram of the internal structure viewed from the front in the current state;

[0034] Figure 11 for Figure 9 A magnified view of a portion of position B in the middle;

[0035] Figure 12 A top view of the internal structure of the ISOFIX structure provided in this embodiment of the invention, with the locking teeth in the open state and the stop pin located at the rearmost recess.

[0036] Figure 13 for Figure 12 A schematic diagram of the internal structure viewed from the front in the current state;

[0037] Figure 14 for Figure 12 A magnified view of the area at position C in the middle;

[0038] Figure 15 A top view of the internal structure of the ISOFIX structure provided in an embodiment of the present invention, showing the teeth in an engaged state.

[0039] Figure 16 for Figure 15 A schematic diagram of the internal structure viewed from the front in the current state;

[0040] Figure 17 for Figure 15 A magnified view of the area at position D in the middle;

[0041] Figure 18 A top view of the internal structure of the ISOFIX structure provided in this embodiment of the invention, with the teeth in an engaged state and the base sleeve moved.

[0042] Figure 19 for Figure 18 A schematic diagram of the internal structure viewed from the front in the current state;

[0043] Figure 20 for Figure 18 A magnified view of the area at position E in the middle;

[0044] Figure 21 This is a schematic diagram of the internal structure of the ISOFIX structure during the unlocking process provided in an embodiment of the present invention;

[0045] Figure 22 for Figure 21 A schematic diagram of the internal structure viewed from the front in the current state;

[0046] Figure 23 for Figure 21 A magnified view of the area at position F.

[0047] Icons: 100-Housing; 110-Gear hole; 120-Clamping end; 130-Tail end; 140-Limiting post; 150-Left housing; 160-Right housing; 200-Base sleeve; 310-Gear pin; 311-First guide slope; 3111-Outer edge of first guide slope; 312-Second guide slope; 3121-Outer edge of second guide slope; 320-Elastic reset element; 400-Release structure; 410-Protrusion; 411-Third guide slope; 420-Recess; 430-Lifting boss; 440-Handle; 510-Clamping tooth; 511-Interlocking part; 512-First abutment part; 513-Second abutment part; 520-Rotating shaft; 530-Elastic traction element; 610-Guide sleeve; 620-Ring; 700-Car anchor point. Detailed Implementation

[0048] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] like Figures 1-23 As shown, the ISOFIX structure provided in this embodiment of the invention can be installed at the bottom of a child car seat, and two ISOFIX structures are typically provided at the bottom of a child car seat.

[0050] like Figures 1-5 As shown, the ISOFIX structure includes a base sleeve 200 and a housing 100. The housing 100 is strip-shaped, and in this embodiment, the length direction of the housing 100 is referred to as the first direction. The base sleeve 200 is sleeved on the outside of the housing 100 and can move relative to the housing 100 along the first direction. Along the first direction, a plurality of spaced-apart stop holes 110 are provided on the outer wall of one side of the housing 100. In this embodiment, the number of stop holes 110 is nine, and the cross-sectional shape of the stop holes 110 can be rectangular. Figure 5As shown, the base sleeve 200 is provided with an elastic locking pin assembly, which includes a shift pin 310 and an elastic reset member 320 connected to the shift pin 310. The movement direction of the shift pin 310 is parallel to the depth direction of the shift hole 110. When the base sleeve 200 slides along the first direction, when the shift pin 310 is aligned with the shift hole 110, the shift pin 310 can extend into the shift hole 110 under the action of the elastic reset member 320. Specifically, the elastic reset member 320 can be a spring. The housing 100 is provided with a release structure 400. By manually or electrically driving the release structure 400, the release structure 400 can push the shift pin 310 outward from the housing 100, thereby allowing the shift pin 310 to leave the shift hole 110.

[0051] The release mechanism 400 is used to push the stop pin 310 outward from the housing 100. Sliding the base sleeve 200 on the housing 100 allows the stop pin 310 on the base sleeve 200 to be inserted into the stop hole 110, enabling adjustment of different stops. The release mechanism 400 unlocks the stop pin 310. The ISOFIX structure provided in this embodiment differs from existing technologies in that its elastic locking pin assembly is no longer located inside the housing 100, but rather on the base sleeve 200. Reducing the number of components inside the housing 100 lowers the overall volume of the housing 100, thereby reducing the volume of the ISOFIX structure and meeting more assembly requirements. Furthermore, removing the elastic locking pin assembly from the housing 100 reduces the number of parts inside the housing 100, facilitating the arrangement of other components and reducing the risk of interference between parts.

[0052] like Figures 6-8 As shown, the top sidewall of the gear pin 310 has a first guide slope 311 and a second guide slope 312 facing the latch end 120 and the tail end 130 of the housing 100, respectively. Along the direction from the latch end 120 to the tail end 130 of the housing 100, the first guide slope 311 is inclined inwards towards the housing 100, and the second guide slope 312 is inclined outwards towards the housing 100. The release structure 400 has a plurality of concave and convex structures corresponding one-to-one with the gear hole 110 on one side facing the gear hole 110. Along the direction from the latch end 120 to the tail end 130 of the housing 100, the concave and convex structures include sequentially arranged protrusions 410 and recesses 420. The release structure 400 can move relative to the housing 100 in a first direction to align the protrusions 410 or recesses 420 with the corresponding gear holes 110. Figures 9-11As shown, when the protrusion 410 is aligned with the gear hole 110 and the top of the gear pin 310 abuts against the top surface of the protrusion 410, along the inner and outer directions of the gear hole 110, the outer edge 3111 of the first guide slope and the outer edge 3121 of the second guide slope are both located outside the gear hole 110.

[0053] The top of the shift pin 310 is the end that abuts against the release mechanism 400. For ease of explanation, in this implementation, the side facing the latch end 120 of the housing 100 is considered the front side, and the side facing the tail end 130 of the housing 100 is considered the rear side. The first guide slope 311 and the second guide slope 312 face the front and rear sides respectively, and are V-shaped, or the extension surfaces of the first guide slope 311 and the second guide slope 312 are V-shaped. Along the inward and outward directions of the housing 100, both the first guide slope 311 and the second guide slope 312 include an inner edge near the inside of the housing 100 and an outer edge away from the housing 100. The inner edges of the first guide slope 311 and the second guide slope 312 are at the same height, while the outer edge 3111 of the first guide slope is higher than the outer edge 3121 of the second guide slope. Multiple convex and concave structures can form a continuous, alternating arrangement of protrusions 410 and depressions 420, and along the direction from the jaw end 120 to the tail end 130, the initial structure in the convex and concave structure is a protrusion 410. For example... Figure 7 and Figure 8 As shown, in the initial state, the recess 420 on the release structure 400 is aligned with the gear hole 110, and the gear pin 310 extends into the recess 420. By pulling the release structure 400 backward along the first direction, the protrusion 410 on the release structure 400 can be aligned with the gear hole 110. At this time, the protrusion 410 on the front side of the gear pin 310 can push the gear pin 310 outward through the first guide slope 311. The top of the gear pin 310 always abuts against the release structure 400 and eventually moves to the top end face of the protrusion 410. The length and position of the first guide slope 311 and the second guide slope 312, as well as the height of the protrusion 410, are rationally designed so that when the top of the shift pin 310 abuts against the top surface of the protrusion 410, the outer edges 3111 and 3121 of the first guide slope and the second guide slope are both located outside the shift hole 110. That is, by pushing the base sleeve 200 back and forth, the shift pin 310 can move outward under the action of the first guide slope 311 and the second guide slope 312, thus completely disengaging from the shift hole 110 and unlocking the shift pin 310. Furthermore, because each shift hole 110 is aligned with its corresponding protrusion 410, the base sleeve 200 can slide freely back and forth along the first direction.

[0054] Furthermore, the protrusion 410 has a third guide slope 411 on the side facing the tail end 130 of the housing 100, which has the same inclination direction as the first guide slope 311. When the release structure 400 moves toward the tail end 130 of the housing 100, the third guide slope 411 is used to slide into contact with the first guide slope 311 and push the shift pin 310 outward toward the top end face of the protrusion 410. The rearward-facing surface of the protrusion 410 can be the third guide slope 411, which is parallel to the first guide slope 311. When the third guide slope 411 contacts the first guide slope 311 of the shift pin 310, the two can slide into contact with each other, and the shift pin 310 can be pushed outward more smoothly.

[0055] like Figure 8 As shown, the lengths and positions of the first guide slope 311 and the second guide slope 312, as well as the depth of the recess 420, are reasonably designed. When the recess 420 on the release structure 400 is aligned with the stop hole 110, and the top end of the stop pin 310 abuts against the bottom surface of the recess 420, along the inward and outward directions of the stop hole 110, the outer edge 3111 of the first guide slope is located outside the stop hole 110, and the second guide slope... The outer edges 3121 of the base sleeve 200 are all located inside the gear shift hole 110. Therefore, when the gear shift pin 310 is located in the gear shift hole 110 and the recess 420, by pushing the base sleeve 200 forward, the first guide slope 311 can abut against the opening edge of the gear shift hole 110. Under the action of the first guide slope 311, the gear shift pin 310 moves outward, thereby completely disengaging the gear shift pin 310 from the gear shift hole 110, and the base sleeve 200 moves forward. However, because the outer edge 3121 of the second guide slope is located inside the gear shift hole 110, and the columnar sidewall of the gear shift pin 310 abuts against the gear shift hole 110, the base sleeve 200 cannot move backward. In other words, the seat body on the base sleeve 200 can move towards the back of the car seat with the base sleeve 200, but cannot move in the opposite direction, thus achieving one-way locking. Because of the limiting function of the car seat backrest, users can push the child seat body as far as possible towards the car seat backrest when the gear pin 310 is locked, making it easier for users to adjust the position of the child safety seat.

[0056] like Figure 7As shown, the ISOFIX structure also includes a locking tooth 510, a rotating shaft 520, and an elastic traction member 530. The locking tooth 510, rotating shaft 520, and elastic traction member 530 are all located at the locking end 120 of the housing 100. The locking tooth 510 is rotatably connected to the housing 100 via the rotating shaft 520. One end of the elastic traction member 530 is connected to the locking tooth 510, and the other end is connected to the release structure 400. The elastic traction member 530 can be a tension spring. The elastic traction member 530 is used to pull the locking tooth 510 and the release structure 400 towards each other, so that the elastic traction member 530 can pull the locking tooth 510 to rotate. Figures 9-11 As shown, when the user pulls the release mechanism 400 backward, the elastic traction member 530 can drive the locking tooth 510 to rotate clockwise, thereby completing the unlocking action of the locking tooth 510. Initially, the engaging portion 511 on the locking tooth 510 is open, and the release mechanism 400 abuts against the locking tooth 510 under the traction of the elastic traction member 530. At this time, the recess 420 on the release mechanism 400 is aligned with the gear shift hole 110. When the release mechanism 400 is pulled backward, because the locking tooth 510 is already in the open state, and due to the structural limitations of the housing 100, the locking tooth 510 cannot continue to rotate clockwise. After the gear shift pin 310 is unlocked, the locking tooth 510 is in a ready-to-engage state with the car anchor point 700.

[0057] like Figures 12-14 As shown, the depth of the recess of the convex-concave structure closest to the tail end 130 of the housing 100 is deeper than the depth of the recess of the other convex-concave structures; when the recess is aligned with the gear hole 110 and the top of the gear pin 310 abuts against the bottom surface of the recess of the convex-concave structure closest to the tail end 130 of the housing 100, along the inner and outer directions of the gear hole 110, the outer edge 3111 of the first guide slope and the outer edge 3121 of the second guide slope are both located inside the gear hole 110.

[0058] In this embodiment, the number of recessed structures 420 is the same as the number of stop holes 110, which can both be nine. The depth of the recessed structure 420 in the rearmost concave-convex structure is deeper than the recessed structures 420 in the other concave-convex structures. By designing the length and position of the first guide slope 311 and the second guide slope 312, as well as the depth of the recessed structure 420 in the rearmost concave-convex structure, it is possible to ensure that when the top of the stop pin 310 abuts against the bottom surface of the recess in the rearmost concave-convex structure, as... Figure 14As shown, the outer edge 3111 of the first guide slope and the outer edge 3121 of the second guide slope are both located inside the gear hole 110. The columnar sidewall of the gear pin 310 abuts against the sidewall of the gear hole 110. The base sleeve 200 cannot slide freely through the first guide slope 311 and the second guide slope 312, and is limited in front and back. Pulling the release mechanism 400 puts the gear pin 310 in the unlocked state. Pulling the base sleeve 200 to the rearmost gear hole 110 releases the release mechanism 400. Under the action of the elastic traction member 530, the release assembly moves forward and abuts against the open locking tooth 510. The recess 420 corresponds to the gear hole 110, and the gear pin 310 can be completely limited into the rearmost gear hole 110. The base sleeve 200 and the housing 100 are relatively fixed, that is, the child safety seat body and the housing 100 are relatively fixed, making it convenient for the user to connect the locking tooth 510 on the housing 100 to the car anchor point 700.

[0059] like Figure 3 , Figure 12 , Figure 13 , Figures 15-17 As shown, the locking teeth 510 are provided with a first abutting portion 512 and a second abutting portion 513 arranged along its circumferential direction. The first abutting portion 512 has an outwardly convex structure, while the second abutting portion 513 has an inwardly concave structure, and the two can form a stepped structure. Figure 12 As shown, when the locking tooth 510 is in the open state, the first abutting part 512 abuts against the release structure 400 under the action of the elastic traction member 530, and the release structure 400 is in a first position relative to the housing 100. When the release structure 400 is in the first position, the stop hole 110 is aligned with the recess 420, and the stop pin 310 can be inserted into the recess 420. Figure 15 As shown, when the locking tooth 510 rotates counterclockwise under the push of the car anchor point 700, the locking tooth 510 is in an engaged state. The second abutment portion 513 abuts against the release structure 400, so that the release structure 400 is in a second position relative to the housing 100. When the release structure 400 is in the second position, the stop hole 110 is aligned with the recess 420. Because the second abutment portion 513 has a concave structure, the release structure 400 will move a small distance forward when the locking tooth 510 changes from the open state to the engaged state. That is, the release structure 400 in the second position is closer to the latch end 120 of the housing 100 than the release structure 400 in the first position.

[0060] like Figure 17As shown, a supporting boss 430 is provided in the recess 420 of the concave-convex structure closest to the tail end 130 of the housing 100. Along the direction from the latch end 120 of the housing 100 toward the tail end 130, a gap is formed between the protrusion 410 of the concave-convex structure closest to the tail end 130 of the housing 100 and the supporting boss 430 to accommodate the stop pin 310. The distance between the protrusion 410 and the supporting boss 430 is at least enough to accommodate the stop pin 310.

[0061] The lifting boss 430 has a fourth guide slope on the side facing the latch end 120 of the housing 100. The inclination direction of the fourth guide slope is consistent with the direction of the second guide slope 312. When the latch 510 changes from the open state to the engaged state, the fourth guide slope is used to slide in contact with the second guide slope 312 of the shift pin 310 and push the shift pin 310 to move outward of the shift hole 110 to the top surface of the lifting boss 430. When the top end of the shift pin 310 abuts against the top surface of the lifting boss 430, the outer edge 3111 of the first guide slope is located outside the shift hole 110, and the outer edge 3121 of the second guide slope is located inside the shift hole 110, so that the base sleeve 200 can move forward but cannot move backward. In the initial state, the release structure 400 abuts against the first abutting part 512 of the locking tooth 510, and the recess 420 is aligned with the gear position opening. Pushing the housing 100 forward causes the biting part 511 of the locking tooth 510 to rotate counterclockwise and bite the car anchor point 700. After the position of the locking tooth 510 changes, the first abutting part 512 no longer abuts against the front end of the release structure 400, and the release structure 400 abuts against the second abutting part 513. Throughout the process, the release structure 400 moves forward a distance, thereby causing the lifting boss 430 to lift the gear position pin 310.

[0062] like Figure 16 As shown, the first abutment portion 512 and the second abutment portion 513 have a stepped structure. When the locking tooth 510 is in the engagement state, the first abutment portion 512 is closer to the tail end 130 of the housing 100 than the second abutment portion 513. When the locking tooth 510 is in the engagement state, the end of the release structure 400 near the locking mouth end 120 is engaged in the stepped structure. The first abutment portion 512 is used to prevent the locking tooth 510 from rotating relative to the housing 100. That is, the locking tooth 510 cannot rotate before the release structure 400 slides out of the stepped structure.

[0063] like Figure 5As shown, the elastic locking pin assembly includes a guide sleeve 610. The base sleeve 200 has a through hole on its wall that connects the inside and outside. The guide sleeve 610 is connected to the outer wall of the base sleeve 200 and the opening of the guide sleeve 610 is aligned with the through hole. The stop pin 310 is slidably connected inside the guide sleeve 610, and the elastic reset member is located between the bottom of the guide sleeve 610 and the bottom of the stop pin 310.

[0064] Both ends of the base sleeve 200 are connected to collars 620. The collar 620 includes a tube body with an outer diameter that is the same as the inner diameter of the base sleeve 200. A limiting edge protruding outward in the circumferential direction is provided at the outer end of the tube body. When the inner end of the tube body is inserted into the base sleeve 200, the limiting edge abuts against the opening of the base sleeve 200. The inner wall of the collar 620 is in direct contact with the shell 100.

[0065] like Figure 1 As shown, the release structure 400 has a handle 440, and the housing 100 has a pull hole to avoid the handle 440. By pulling the handle 440, the release structure 400 can be moved away from the locking tooth 510.

[0066] like Figure 3 As shown, a limiting post 140 is provided inside the housing 100, and a strip-shaped limiting hole is provided on the release structure 400. The length direction of the strip-shaped limiting hole is the front-back direction of the housing 100, and the limiting post 140 is located inside the limiting hole, so that the release structure 400 can move back and forth stably relative to the housing 100.

[0067] The housing 100 can be composed of a left housing 150 and a right housing 160, wherein the stop hole 110 can be located on the left housing 150.

[0068] The principle behind the ISOFIX structure is as follows:

[0069] 1. For example Figures 6-8 As shown, in the initial state, the locking tooth 510 is in the open state. Under the action of the elastic traction member 530, the first abutting part 512 of the locking tooth 510 abuts against the release structure 400. The recess 420 on the release structure 400 is aligned with the stop hole 110. The stop pin 310 on the base sleeve 200 is located in the foremost stop hole 110.

[0070] 2. For example Figures 9-11 As shown, pulling the release mechanism 400 backward causes the protrusion 410 on the release mechanism 400 to lift the gear pin 310. At this time, the outer edge 3121 of the second guide slope of the gear pin 310 is higher than the opening edge of the gear hole 110. The rear side of the gear hole 110 pushes the second guide slope 312 of the gear pin 310 upward, which can push the gear pin 310 out of the gear hole 110.

[0071] 3. For example Figures 12-14 As shown, the base sleeve 200 can be pulled to the rear end of the housing 100, and the release mechanism 400 can be released. The release mechanism 400 is in the first position, with the recess 420 aligned with the gear hole 110. The straight surfaces on both sides of the gear pin 310 are located in the recess 420 below the gear hole 110 on the rearmost side. At this time, it cannot move forward or backward, and is limited in front and behind to prevent the base sleeve 200 from shaking when the ISOFIX structure is connected to the car anchor point 700.

[0072] 4. For example Figures 15-17 As shown, when the locking tooth 510 is engaged with the car anchor point 700, after the locking tooth 510 rotates, the first abutment structure on the locking tooth 510 no longer abuts against the release structure 400. The release structure 400 moves forward under the pull of the elastic traction member 530 and abuts against the second abutment part 513 of the locking tooth 510. At the same time, the lifting step at the rear end of the release structure 400 lifts the gear pin 310. At this time, the outer edge 3111 of the first guide slope of the gear pin 310 is higher than the front edge of the opening of the gear hole 110, and the rear straight surface of the gear pin 310 is located below the rear edge of the opening of the gear hole. At this time, the base sleeve 200 can move forward but cannot move backward, thus achieving one-way locking.

[0073] 5. For example Figures 18-20 As shown, when the locking teeth 510 are in the engaged state, the base sleeve 200 can slide on the housing 100 along the first direction, and the base sleeve 200 can move to the position closest to the car seat back to complete the installation of the child safety seat.

[0074] 6. For example Figures 21-23 As shown, the rearward release structure 400, the third guide slope 411 of the release structure 400 pushes open the stop pin 310, realizing the unlocking of the stop pin 310; the release structure 400 leaves the stepped structure of the locking tooth 510, and the locking tooth 510 rotates clockwise to the open state under the action of the elastic traction member 530.

[0075] The child safety seat provided in this embodiment of the invention includes the ISOFIX structure described above. Because the child safety seat provided in this embodiment of the invention utilizes the ISOFIX structure, it also possesses the advantages of the ISOFIX structure.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ISOFIX structure, characterized in that, include: A base sleeve (200) and a housing (100) extending in a first direction, the base sleeve (200) being sleeved on the outside of the housing (100) and movable relative to the housing (100) in the first direction; Along the first direction, a plurality of spaced gear holes (110) are provided on the outer wall of the housing (100), and an elastic locking pin assembly is provided on the base sleeve (200). The elastic locking pin assembly includes a gear pin (310) and an elastic reset member (320) connected to the gear pin (310). The gear pin (310) can be inserted into the gear hole (110), and the elastic reset member (320) is used to make the gear pin (310) have a tendency to move into the gear hole (110). The housing (100) is provided with a release structure (400) for pushing the gear pin (310) to the outside of the housing (100); The top sidewall of the gear pin (310) has a first guide slope (311) and a second guide slope (312) facing the latch end (120) and the tail end (130) of the housing (100), respectively. Along the direction from the latch end (120) of the housing (100) toward the tail end (130), the first guide slope (311) is inclined toward the inside of the housing (100), and the second guide slope (312) is inclined toward the outside of the housing (100). The release structure (400) has a plurality of concave and convex structures on the side facing the gear hole (110) that correspond one-to-one with the gear hole (110); along the direction from the latch end (120) to the tail end (130) of the housing (100), the concave and convex structures include protrusions (410) and recesses (420) arranged in sequence. The release structure (400) is movable relative to the housing (100) in a first direction so that the protrusion (410) or the recess (420) is aligned with the corresponding gear hole (110); when the protrusion (410) is aligned with the gear hole (110) and the top end of the gear pin (310) abuts against the top surface of the protrusion (410), the outer edge (3111) of the first guide slope and the outer edge (3121) of the second guide slope are both located outside the gear hole (110) in the inward and outward directions of the gear hole (110); When the recess (420) on the release structure (400) is aligned with the gear hole (110) and the top of the gear pin (310) abuts against the bottom surface of the recess (420), along the inner and outer directions of the gear hole (110), the outer edge (3111) of the first guide slope is located outside the gear hole (110), and the outer edge (3121) of the second guide slope is located inside the gear hole (110).

2. The ISOFIX structure according to claim 1, characterized in that, The protrusion (410) has a third guide slope (411) on one side facing the tail end (130) of the housing (100) with the same inclination direction as the first guide slope (311). When the release structure (400) moves toward the tail end (130) of the housing (100), the third guide slope (411) is used to slide in contact with the first guide slope (311) and push the gear pin (310) to the top end face of the protrusion (410) outside the gear hole (110).

3. The ISOFIX structure according to claim 1, characterized in that, The ISOFIX structure further includes a locking tooth (510), a rotating shaft (520), and an elastic traction member (530). The locking tooth (510) is rotatably connected to the housing (100) via the rotating shaft (520). One end of the elastic traction member (530) is connected to the locking tooth (510), and the other end is connected to the release structure (400). The elastic traction member (530) is used to pull the locking tooth (510) and the release structure (400) toward each other so that the elastic traction member (530) can pull the locking tooth (510) to rotate.

4. The ISOFIX structure according to claim 3, characterized in that, The depth of the recess of the convex-concave structure closest to the tail end (130) of the housing (100) is deeper than the depth of the recess of the other convex-concave structures; When the recess is aligned with the gear hole (110) and the top of the gear pin (310) abuts against the bottom surface of the recess of the concave-convex structure closest to the tail end (130) of the housing (100), the outer edge (3111) of the first guide slope and the outer edge (3121) of the second guide slope are both located inside the gear hole (110) along the inner and outer directions of the gear hole (110).

5. The ISOFIX structure according to claim 4, characterized in that, The locking tooth (510) is provided with a first abutting part (512) and a second abutting part (513) arranged in its circumferential direction. The first abutting part (512) is used to abut against the release structure (400) when the locking tooth (510) is in the open state, and to make the release structure (400) relative to the housing (100) in a first position. When the release structure (400) is in the first position, the stop hole (110) is aligned with the recess (420). The second abutting part (513) is used to abut against the release structure (400) when the locking tooth (510) is in the engaged state, and to place the release structure (400) in a second position relative to the housing (100). When the release structure (400) is in the second position, the stop hole (110) is aligned with the recess (420), and the release structure (400) located in the second position is closer to the latch end (120) of the housing (100) than the release structure (400) located in the first position. A lifting boss (430) is provided in the recess (420) of the concave-convex structure closest to the tail end (130) of the housing (100). Along the direction from the latch end (120) of the housing (100) toward the tail end (130), a gap is formed between the protrusion (410) of the concave-convex structure closest to the tail end (130) of the housing (100) and the lifting boss (430) to accommodate the stop pin (310). The side of the lifting boss (430) facing the latch end (120) of the housing (100) has a fourth guide slope. When the locking tooth (510) changes from the open state to the engaged state, the fourth guide slope is used to slide in contact with the second guide slope (312) of the gear pin (310) and push the gear pin (310) to move outward from the gear hole (110) to the top surface of the lifting boss (430); when the top of the gear pin (310) abuts against the top surface of the lifting boss (430), the outer edge (3111) of the first guide slope is located outside the gear hole (110), and the outer edge (3121) of the second guide slope is located inside the gear hole (110).

6. The ISOFIX structure according to claim 5, characterized in that, The first abutment (512) and the second abutment (513) are in a stepped structure. When the locking tooth (510) is in the biting state, the end of the release structure (400) near the locking mouth end (120) is engaged in the stepped structure. The first abutment (512) is used to prevent the locking tooth (510) from rotating relative to the housing (100).

7. The ISOFIX structure according to claim 1, characterized in that, The elastic locking pin assembly includes a guide sleeve (610), and the base sleeve (200) has a through hole on its wall that connects the inside and outside. The guide sleeve (610) is connected to the outer wall of the base sleeve (200) and the opening of the guide sleeve (610) is aligned with the through hole. The gear pin (310) is slidably connected inside the guide sleeve (610), and the elastic reset member is located between the bottom of the guide sleeve (610) and the bottom of the gear pin (310).

8. A child safety seat, characterized in that, Includes the ISOFIX structure as described in any one of claims 1-7.

Images