CN117284172A

CN117284172A - Supporting leg forgetting prevention structure and method and child safety seat

Info

Publication number: CN117284172A
Application number: CN202311217509.7A
Authority: CN
Inventors: 周小林
Original assignee: Max Inf Ningbo Baby Product Co Ltd
Current assignee: Max Inf Ningbo Baby Product Co Ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2023-12-26

Abstract

The invention provides a supporting leg forgetting prevention structure and method and a child safety seat, comprising a base, an ISOFIX assembly and supporting legs hinged with the base, wherein the ISOFIX assembly comprises ISOFIX and a sleeve which are connected with each other in a sliding manner, and the sleeve is connected with the base; the ISOFIX assembly further comprises a limiting block connected with the ISOFIX, the base is movably connected with a limiting assembly which is suitable for being matched with the limiting block, and the limiting assembly is suitable for being connected with the supporting leg; when ISOFIX is in the state of accomodating and the supporting leg is in the folded condition, spacing subassembly and stopper cooperation are in order to restrict ISOFIX and stretch out, and when the supporting leg is in the state of opening, spacing subassembly and stopper break away from each other so that ISOFIX can stretch out for the sleeve pipe. Only when opening the supporting leg earlier for the supporting leg is in the open state, ISOFIX just can stretch out in the sleeve pipe so that follow-up and car seat are fixed, can effectively prevent that the user from forgetting to open the supporting leg when using children's safety seat, ensures children's security of taking.

Description

Supporting leg forgetting prevention structure and method and child safety seat

Technical Field

The invention relates to the technical field of automobile safety products, in particular to a supporting leg forgetting prevention structure and method and a child safety seat.

Background

With consumer awareness of safety, more and more people tend to choose products that integrate ISOFIX and support leg functions when buying child safety seats. With the newer iteration of regulations, some child safety seats have support legs designed to be foldable and stowable, which also presents potential safety hazards, such as the risk that people may forget to deploy the support legs during use, thereby affecting the stability of the seat and providing a risk to the seated child.

Disclosure of Invention

To solve at least one aspect of the above problems, the present invention firstly provides a supporting leg anti-forgetting structure, which comprises a base, an ISOFIX assembly and a supporting leg hinged with the base, wherein the ISOFIX assembly comprises an ISOFIX and a sleeve which are connected with each other in a sliding manner, and the sleeve is connected with the base; the ISOFIX assembly further comprises a limiting block connected with the ISOFIX, the base is movably connected with a limiting assembly which is suitable for being matched with the limiting block, and the limiting assembly is suitable for being connected with the supporting leg; when the ISOFIX is in a storage state and the supporting legs are in a folding state, the limiting component is matched with the limiting block to limit the ISOFIX to extend, and when the supporting legs are in an opening state, the limiting component and the limiting block are separated from each other to enable the ISOFIX to extend relative to the sleeve.

Optionally, the limiting block is provided with a connecting rod connected with the ISOFIX, and the sleeve is provided with a sliding groove in sliding connection with the connecting rod.

Optionally, the limiting component comprises a limiting stop and a first reset piece, two ends of the first reset piece are respectively connected with the base and the limiting stop, and when the supporting legs are in a folded state, the supporting legs push the limiting stop to extend out so as to realize the cooperation of the limiting stop and the limiting block; when the supporting leg is in an open state, the limit stop is retracted under the action of the elastic force of the first reset piece so that the limit stop and the limiting block are separated from each other.

Optionally, the limiting assembly further comprises a limiting push block and a second reset piece, wherein the limiting push block is movably connected with the limiting stop, and two ends of the second reset piece are respectively connected with the limiting push block and the limiting stop; when the supporting legs are in a folded state, the limiting push block is abutted with the supporting legs.

Optionally, the limiting push block is provided with a first guide surface, and the supporting leg is provided with a second guide surface which is suitable for being matched with the first guide surface.

Optionally, the limit stop is provided with a third guiding surface, and the limit stop is provided with a fourth guiding surface adapted to cooperate with the third guiding surface.

Optionally, the base is provided with a through groove for installing the limiting push block, and the limiting push block is in left-right sliding connection with the through groove.

Optionally, the limit stop is provided with a sliding block, and the limit push block is provided with a sliding groove in sliding connection with the sliding block.

Optionally, the spout is equipped with first through-hole, the slider is equipped with the second through-hole, the base is equipped with runs through in proper order first through-hole and second through-hole's spacing post, first through-hole with the second through-hole all with spacing post sliding connection.

Compared with the prior art, according to the supporting leg forgetting prevention structure, when the ISOFIX is in the storage state and the supporting leg is in the folding state, the limiting component capable of limiting the movement of the limiting block of the ISOFIX is movably connected to the base, so that the ISOFIX can extend out of the sleeve only when the supporting leg is in the opening state, so that the supporting leg can be fixed with the automobile seat later, the user can be effectively prevented from forgetting to open the supporting leg when using the child safety seat, and the riding safety of the child is ensured.

In addition, the invention provides a supporting leg forgetting prevention method, which is realized based on the supporting leg forgetting prevention structure, and comprises the following steps: when the ISOFIX is switched to a storage state and the supporting legs are switched to a folding state, the limiting component is matched with the limiting block, so that the ISOFIX can be limited to extend; when the supporting legs are switched to an open state, the limiting assembly and the limiting block are separated from each other, and the ISOFIX can extend out relative to the sleeve.

Optionally, the limit assembly includes a limit stop and a first reset member; switching the supporting legs to a folding state, wherein the supporting legs push the limit stop to extend out, and the limit stop is matched with the limiting block when the ISOFIX is in a storage state; and switching the supporting leg to an open state, wherein the limit stop retracts under the action of the elastic force of the first resetting piece, and the limit stop is separated from the limiting block.

Optionally, the limiting assembly further comprises a limiting push block and a second reset piece, and two ends of the second reset piece are respectively connected with the limiting push block and the limiting stop block; switching the supporting legs to a folding state, abutting the supporting legs with the limit pushing block and pushing the limit stop to extend out, wherein the limit stop is matched with the limit block when the ISOFIX is in a storage state; and switching the supporting leg to an open state, wherein the limit stop retracts under the action of the elastic force of the first reset piece, the limit stop is separated from the limiting block, and the limiting push block moves inwards to reset under the action of the elastic force of the second reset piece.

Optionally, the limit stop is provided with a third guide surface, and the limit block is provided with a fourth guide surface which is suitable for being matched with the third guide surface; and switching the supporting legs to a folding state, and switching the ISOFIX from an extending state to a storage state, wherein the third guide surface is in abutting fit with the fourth guide surface, the limiting block pushes the limiting block to move inwards until the limiting block slides over the limiting block to an initial position, and the limiting block moves outwards under the action of the elastic force of the first reset piece to extend, so that the limiting block is limited to move.

Compared with the prior art, the supporting leg forgetting prevention method has the same advantages as the supporting leg forgetting prevention structure compared with the prior art, and the description is omitted here.

In addition, the invention provides a child safety seat comprising the support leg anti-forgetting structure.

Compared with the prior art, the child safety seat has the same advantages as the supporting leg forgetting prevention structure compared with the prior art, and the child safety seat is not described in detail herein.

Drawings

FIG. 1 is an exploded view of an ISOFIX assembly of an embodiment of the present invention;

FIG. 2 is an exploded view of a spacing assembly according to an embodiment of the present invention;

FIG. 3 is a block diagram of a support leg anti-forgetting structure of an embodiment of the present invention with ISOFIX and support legs in an initial position;

FIG. 4 is a cross-sectional view of a support leg anti-forgetting structure of an embodiment of the present invention with ISOFIX and support legs in an initial position;

fig. 5 is an enlarged view of a portion a in fig. 4;

fig. 6 is a structural view of a supporting leg forgetting prevention structure in an opened state of the supporting leg according to an embodiment of the present invention;

FIG. 7 is a block diagram of a leg anti-forgetting structure of an embodiment of the present invention with the legs in an open state and ISOFIX in an extended state;

FIG. 8 is a cross-sectional view of a support leg anti-forgetting structure of an embodiment of the present invention when the support leg is switched from an open state to a folded state and ISOFIX is in an extended state;

fig. 9 is an enlarged view of the portion B in fig. 8;

fig. 10 is a structural diagram of the support leg anti-forgetting structure of the embodiment of the present invention when the support leg is in a folded state and ISOFIX needs to be switched to a stored state;

fig. 11 is an enlarged view of a portion C in fig. 10.

Reference numerals illustrate:

1. a base; 11. a through groove; 12. a limit column; 2. ISOFIX component; 21. ISOFIX; 22. a sleeve; 221. a sliding groove; 23. a limiting block; 231. a connecting rod; 232. a fourth guide surface; 3. support legs; 31. a second guide surface; 4. a limit component; 41. a limit stop; 411. a third guide surface; 412. a slide block; 413. a second through hole; 42. a first reset member; 43. limiting push blocks; 431. a first guide surface; 432. a first through hole; 433. a chute; 44. and a second reset piece.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", etc. indicate an orientation or positional relationship based on the orientation or positional relationship when the product is normally used.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the drawings of the embodiments of the present invention, a coordinate system XYZ is provided in which the forward direction of the X axis represents the left direction, the reverse direction of the X axis represents the right direction, the forward direction of the Y axis represents the front direction, the reverse direction of the Y axis represents the rear direction, the forward direction of the Z axis represents the upper direction, and the reverse direction of the Z axis represents the lower direction.

The embodiment of the invention provides a supporting leg forgetting prevention structure, which is shown in combination with figures 1 to 7 and comprises a base 1, an ISOFIX assembly 2 and a supporting leg 3 which is hinged with the base 1, wherein the ISOFIX assembly 2 comprises an ISOFIX21 and a sleeve 22 which are connected with each other in a sliding way, and the sleeve 22 is connected with the base 1; the ISOFIX assembly 2 further comprises a limiting block 23 connected with the ISOFIX21, the base 1 is movably connected with a limiting assembly 4 which is suitable for being matched with the limiting block 23, and the limiting assembly 4 is suitable for being connected with the supporting leg 3; when the ISOFIX21 is in the storage state and the support leg 3 is in the folded state, the limiting component 4 cooperates with the limiting block 23 to limit the ISOFIX21 to extend, and when the support leg 3 is in the open state, the limiting component 4 and the limiting block 23 are mutually separated so that the ISOFIX21 can extend relative to the sleeve 22.

Wherein, the supporting legs 3 can be rotatably folded, stored and unfolded, and the base 1 is provided with a groove for storing the supporting legs 3; ISOFIX21 has a stowed condition and an extended condition, ISOFIX21 in the stowed condition meaning ISOFIX21 is retracted within sleeve 22 and ISOFIX21 in the extended condition meaning ISOFIX21 is extended relative to sleeve 22 for connection securement with the vehicle seat; the supporting legs 3 have a folded state in which the supporting legs 3 are folded and received in the base 1, and an unfolded state in which the supporting legs 3 are unfolded forward to upwardly support the front end of the base 1; when the state of the supporting leg 3 is changed, the position state of the limiting component 4 can be changed, and the supporting leg 3 and the limiting component 4 can be in abutting connection, hinged connection or other transmission connection structures; the matching between the limiting block 23 and the limiting component 4 can be an abutting connection or other detachable connection matching structures.

According to the supporting leg forgetting prevention structure in the embodiment, when the ISOFIX21 is in a storage state and the supporting leg 3 is in a folding state, the limiting component 4 capable of limiting the movement of the limiting block 23 of the ISOFIX21 is movably connected to the base 1, so that the ISOFIX21 can extend out of the sleeve 22 only when the supporting leg 3 is in an open state, so that the supporting leg 3 can be fixed with a car seat later, the user can be effectively prevented from forgetting to open when using the child safety seat, and the riding safety of the child is ensured.

Optionally, as shown in connection with fig. 1, the stopper 23 is provided with a connecting rod 231 connected to the ISOFIX21, and the sleeve 22 is provided with a sliding groove 221 slidably connected to the connecting rod 231. ISOFXI components are arranged on two sides of the base 1, a sleeve 22 is sleeved outside the ISOFIX21, a hole for fixing a connecting rod 231 of a limiting block 23 is formed in the ISOFIX21, the connecting rod 231 can move back and forth freely in a sliding groove 221, and the limiting block 23 can slide synchronously with the ISOFIX 21.

Alternatively, as shown in fig. 1 to 7, the limit assembly 4 includes a limit stop 41 and a first reset member 42, both ends of the first reset member 42 are respectively connected to the base 1 and the limit stop 41, and when the support leg 3 is in a folded state, the support leg 3 pushes the limit stop 41 to extend so as to enable the limit stop 41 to be engaged with the limit stop 23; when the support leg 3 is in the open state, the limit stop 41 is retracted by the elastic force of the first restoring member 42 to disengage the limit stop 41 and the stopper 23 from each other.

Wherein, the first reset piece 42 is a compression spring, when the supporting leg 3 is in a folded state, the supporting leg 3 pushes the limit stop 41 to extend, at this time, the first reset piece 42 is in a compressed state, and when the supporting leg 3 is in a folded state and the ISOFIX21 is in a storage state, the limit stop 41 can limit the ISOFIX21 to extend; when the supporting leg 3 is opened, the limit stop 41 loses the thrust action of the supporting leg 3, the limit stop 41 moves and retracts under the action of the spring force of the first reset piece 42, at the moment, the limit stop 41 is completely separated from the limiting block 23, the ISOFIX21 can freely move back and forth in the sleeve 22, when the ISOFIX21 is adjusted to a proper extending length, the position between the ISOFIX21 and the sleeve 22 is mutually fixed by locking the gear, and the child safety seat is installed on an automobile seat, so that the structure is simple and reliable.

Optionally, as shown in fig. 1 to 7, the limiting assembly 4 further includes a limiting push block 43 and a second reset piece 44, where the limiting push block 43 is movably connected with the limiting stop 41, and two ends of the second reset piece 44 are respectively connected with the limiting push block 43 and the limiting stop 41; when the supporting leg 3 is in a folded state, the limiting push block 43 abuts against the supporting leg 3.

The second reset piece 44 is a compression spring, when the supporting leg 3 is in a folded state, the supporting leg 3 contacts the limit push block 43 and pushes the limit push block 43 to move outwards, the limit push block 43 compresses the second reset piece 44, the limit stop 41 moves outwards under the action of the spring thrust of the second reset piece 44, at the moment, the first reset piece 42 is in a compressed state, and when the supporting leg 3 is in a folded state and the ISOFIX21 is in a storage state, the limit stop 41 can limit the ISOFIX21 to extend; when the supporting leg 3 is opened, the limit push block 43 loses the thrust action of the supporting leg 3, the limit stop 41 moves and retracts under the action of the spring force of the first reset piece 42, the limit stop 41 compresses the second reset piece 44, the limit push block 43 moves inwards under the action of the spring thrust of the second reset piece 44, at the moment, the limit stop 41 is completely separated from the limit block 23, the ISOFIX21 can move back and forth freely in the sleeve 22, and when the ISOFIX21 is adjusted to a proper extension length, the position between the ISOFIX21 and the sleeve 22 is mutually fixed by the locking gear, so that the child safety seat is installed on the automobile seat.

In this embodiment, the limit stop block 43 and the limit stop block 41 are movably connected with each other, and when the support leg 3 is in the folded state, the acting force can change the position between the limit stop block 41 and the limit stop block 43 on the limit stop block 41, so as to move the extension length of the ISOFIX21 under special conditions. When the support leg 3 is in the folded state and the ISOFIX21 is also in the storage state, this state is a common initial state at the time of shipment of the child seat, and is also a state after the child safety seat is detached from the vehicle by the consumer after the seat is used.

In this embodiment, the ISOFIX21 is blocked by the limit stop 41, so that the ISOFIX21 cannot slide normally and stretch out, the support leg 3 needs to be pulled out and opened by rotating, the limit push block 43 resets and slides inwards under the action of the second reset piece 44, the limit push block 43 also slides inwards under the action of the first reset piece 42, at this time, the limit block 23 is not blocked by the limit stop 41, the ISOFIX21 can stretch out and retract, and the seat installation is completed, so that the risk that a consumer forgets to use the support leg 3 when using is avoided, and the travel safety of children is improved.

Alternatively, as shown in fig. 8 and 9, the limit pushing block 43 is provided with a first guiding surface 431, and the supporting leg 3 is provided with a second guiding surface 31 adapted to cooperate with the first guiding surface 431.

When the consumer uses the full child safety seat and needs to detach the child safety seat from the vehicle for storage, that is, when the supporting leg 3 needs to be switched from the open state to the folded state, the operation can be performed once again in reverse according to the opening sequence, that is, the ISOFIX21 is retracted to the initial position, then the supporting leg 3 is rotated, folded and retracted to the full storage state, at this time, the limit pushing block 43 is pressed and moved outwards under the action of the contact force of the first guiding surface 431 and the second guiding surface 31, and the limit stop 41 is extended outwards under the drive of the limit pushing block 43 to block the limit block 23.

Alternatively, as shown in fig. 10 and 11, the limit stop 41 is provided with a third guide surface 411, and the stopper 23 is provided with a fourth guide surface 232 adapted to cooperate with the third guide surface 411.

When the ISOFIX21 is in the extending state, the consumer can fold and store the support leg 3 at will, and at this time, the limit push block 43 presses the limit push block 43 outwards through the cooperation of the first guide surface 431 and the second guide surface 31, the limit stop 41 extends outwards under the driving of the limit push block 43, the ISOFIX21 is in the extending state, the ISOFIX21 can not be limited by the limit stop 41 extending outwards, and can retract to the initial position freely; when the ISOFIX21 is retracted to the position where the stopper 23 contacts the limit stop 41, the stopper 23 and the limit stop 41 move inward in the slide groove 433 of the limit stop 43 under the cooperation of the third guide surface 411 and the fourth guide surface 232, and the second restoring member 44 between the limit stop 41 and the limit stop 43 is compressed until the stopper 23 slides over the limit stop 41 to the initial position, at this time, the limit stop 41 moves outward under the action of the first restoring member 42 to block the stopper 23.

Optionally, as shown in fig. 4 and 5, the base 1 is provided with a through groove 11 for installing the limiting push block 43, and the limiting push block 43 is connected with the through groove 11 in a left-right sliding manner. The limit push block 43 can freely move in the left-right direction in the through groove 11, so that the stability of the movement of the limit push block 43 can be ensured, and the position change of the limit push block 43 can be realized.

Alternatively, as shown in fig. 2 and 5, the limit stop 41 is provided with a slide block 412, and the limit push block 43 is provided with a slide groove 433 slidably connected to the slide block 412. The second reset member 44 is installed in the chute 433, the sliding block 412 is inserted in the chute 433, and the chute 433 and the sliding block 412 which are slidably connected with each other are provided, so that the overall lengths of the limit stop 41 and the limit push block 43 can be changed, and the limit assembly 4 can be adapted to various use states.

Optionally, as shown in fig. 2 and 5, the chute 433 is provided with a first through hole 432, the slide block 412 is provided with a second through hole 413, the base 1 is provided with a limiting post 12 penetrating through the first through hole 432 and the second through hole 413 in sequence, and the first through hole 432 and the second through hole 413 are slidably connected with the limiting post 12. The first through hole 432 and the second through hole 413 are both rectangular holes, and the spacing post 12 can freely move about in the first through hole 432 and the second through hole 413, can guarantee the mutual removal between limit stop 41 and the spacing ejector pad 43, also can prevent limit stop 41 and spacing ejector pad 43 from breaking away from each other, ensures the stability of structure, and overall structure is also compacter.

Another embodiment of the present invention provides a supporting leg forgetting prevention method, which is implemented based on the supporting leg forgetting prevention structure as described above, with reference to fig. 1 to 11, and includes the steps of:

when the ISOFIX21 is switched to the storage state and the supporting legs 3 are switched to the folding state, the limiting assembly 4 is matched with the limiting block 23, so that the ISOFIX21 can be limited to extend;

when the supporting leg 3 is switched to the open state, the limiting assembly 4 and the limiting block 23 are separated from each other, and the ISOFIX21 can extend relative to the sleeve 22.

In the child safety seat in this embodiment, when the ISOFIX21 is in the storage state and the supporting leg 3 is in the folded state, the base 1 is movably connected with the limiting component 4 capable of limiting the movement of the limiting block 23 of the ISOFIX21, so that the ISOFIX21 can extend out of the sleeve 22 only when the supporting leg 3 is in the open state, so that the user can be effectively prevented from forgetting to open the supporting leg 3 when using the child safety seat, and the child riding safety is ensured.

Optionally, the limit assembly 4 includes a limit stop 41 and a first reset member 42;

switching the supporting leg 3 to a folded state, wherein the supporting leg 3 pushes the limit stop 41 to extend, and the limit stop 41 is matched with the limiting block 23 when the ISOFIX21 is in a storage state;

the supporting leg 3 is switched to an open state, the limit stop 41 is retracted under the elastic force of the first reset member 42, and the limit stop 41 and the limit stop 23 are separated from each other.

Optionally, the limiting assembly 4 further includes a limiting push block 43 and a second reset piece 44, where two ends of the second reset piece 44 are connected to the limiting push block 43 and the limiting stop 41 respectively;

switching the supporting leg 3 to a folded state, wherein the supporting leg 3 is abutted against the limit pushing block 43 and pushes the limit stop 41 to extend, and the limit stop 41 is matched with the limit block 23 when the ISOFIX21 is in a storage state;

the supporting leg 3 is switched to an open state, the limit stop 41 is retracted under the action of the elastic force of the first reset piece 42, the limit stop 41 and the limit block 23 are separated from each other, and the limit push block 43 moves inwards to reset under the action of the elastic force of the second reset piece 44.

In this embodiment, since the stopper 23 is blocked by the limit stop 41, the ISOFIX21 cannot normally slide and extend, the support leg 3 needs to be pulled out and opened by rotating, the limit push block 43 resets and slides inward under the action of the second reset piece 44, the limit push block 43 also slides inward under the action of the first reset piece 42, at this time, the stopper 23 is not blocked by the limit stop 41, the ISOFIX21 can extend and retract, and the seat installation is completed, so that the risk that a consumer forgets to use the support leg 3 when using is avoided, and the safety of child trip is improved

Optionally, the limit stop 41 is provided with a third guiding surface 411, and the stopper 23 is provided with a fourth guiding surface 232 adapted to cooperate with the third guiding surface 411;

and in the process of switching the supporting leg 3 to the folded state and switching the ISOFIX21 from the extended state to the storage state, the third guide surface 411 is in abutting fit with the fourth guide surface 232, the limiting block 23 pushes the limiting block 41 to move inwards until the limiting block 23 slides over the limiting block 41 to the initial position, and the limiting block 41 moves outwards under the action of the elastic force of the first reset piece 42 to extend, so that the limiting block 23 is limited to move.

Another embodiment of the present invention provides a child safety seat comprising a support leg anti-forgetting structure as described above.

Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.

Claims

1. The supporting leg forgetting prevention structure is characterized by comprising a base (1), an ISOFIX assembly (2) and a supporting leg (3) hinged with the base (1), wherein the ISOFIX assembly (2) comprises ISOFIX (21) and a sleeve (22) which are connected with each other in a sliding manner, and the sleeve (22) is connected with the base (1); the ISOFIX assembly (2) further comprises a limiting block (23) connected with the ISOFIX (21), the base (1) is movably connected with a limiting assembly (4) which is suitable for being matched with the limiting block (23), and the limiting assembly (4) is suitable for being connected with the supporting legs (3); when the ISOFIX (21) is in a storage state and the supporting legs (3) are in a folding state, the limiting component (4) is matched with the limiting blocks (23) to limit the ISOFIX (21) to extend, and when the supporting legs (3) are in an opening state, the limiting component (4) and the limiting blocks (23) are separated from each other so that the ISOFIX (21) can extend relative to the sleeve (22).

2. The supporting leg forgetting prevention structure according to claim 1, characterized in that the stopper (23) is provided with a connecting rod (231) connected with the ISOFIX (21), and the sleeve (22) is provided with a sliding groove (221) slidingly connected with the connecting rod (231).

3. The supporting leg forgetting prevention structure according to claim 1, characterized in that the limit assembly (4) comprises a limit stop (41) and a first reset member (42), both ends of the first reset member (42) are respectively connected with the base (1) and the limit stop (41), when the supporting leg (3) is in a folded state, the supporting leg (3) pushes the limit stop (41) to extend so as to realize the cooperation of the limit stop (41) with the limit stop (23); when the supporting leg (3) is in an open state, the limit stop (41) is retracted under the elastic force of the first reset piece (42) so that the limit stop (41) and the limiting block (23) are separated from each other.

4. A supporting leg forgetting prevention structure according to claim 3, characterized in that the limit assembly (4) further comprises a limit push block (43) and a second reset piece (44), the limit push block (43) is movably connected with the limit stop (41), and two ends of the second reset piece (44) are respectively connected with the limit push block (43) and the limit stop (41); when the supporting legs (3) are in a folded state, the limiting push blocks (43) are abutted with the supporting legs (3).

5. The support leg anti-forgetting structure according to claim 4, characterized in that the limit push block (43) is provided with a first guide surface (431) and the support leg (3) is provided with a second guide surface (31) adapted to cooperate with the first guide surface (431).

6. The support leg anti-forgetting structure according to claim 4, characterized in that the limit stop (41) is provided with a third guide surface (411), and the stopper (23) is provided with a fourth guide surface (232) adapted to cooperate with the third guide surface (411).

7. The supporting leg forgetting prevention structure according to claim 4, wherein the base (1) is provided with a through groove (11) for installing the limiting push block (43), and the limiting push block (43) is connected with the through groove (11) in a left-right sliding manner.

8. The supporting leg forgetting prevention structure according to claim 4, characterized in that the limit stop (41) is provided with a slider (412), and the limit push block (43) is provided with a chute (433) slidingly connected with the slider (412).

9. The supporting leg forgetting prevention structure according to claim 8, wherein the chute (433) is provided with a first through hole (432), the slider (412) is provided with a second through hole (413), the base (1) is provided with a limit post (12) penetrating through the first through hole (432) and the second through hole (413) in sequence, and the first through hole (432) and the second through hole (413) are both in sliding connection with the limit post (12).

10. A supporting leg anti-forgetting method, characterized in that it is realized based on the supporting leg anti-forgetting structure according to any one of claims 1 to 9, comprising the steps of:

when the ISOFIX (21) is switched to a storage state and the supporting legs (3) are switched to a folding state, the limiting component (4) is matched with the limiting block (23) to limit the ISOFIX (21) to extend out;

when the supporting leg (3) is switched to an open state, the limiting component (4) and the limiting block (23) are separated from each other, and the ISOFIX (21) can extend out relative to the sleeve (22).

11. The support leg anti-forgetting method according to claim 10, characterized in that the limit assembly (4) comprises a limit stop (41) and a first return (42);

switching the supporting leg (3) to a folded state, wherein the supporting leg (3) pushes the limit stop (41) to extend, and the limit stop (41) is matched with the limiting block (23) when the ISOFIX (21) is in a storage state;

the supporting leg (3) is switched to an open state, the limit stop (41) is retracted under the action of the elastic force of the first reset piece (42), and the limit stop (41) and the limiting block (23) are separated from each other.

12. The method for preventing forgetting a supporting leg according to claim 11, characterized in that the limit assembly (4) further comprises a limit push block (43) and a second reset member (44), both ends of the second reset member (44) are respectively connected with the limit push block (43) and the limit stop (41);

switching the supporting leg (3) to a folded state, wherein the supporting leg (3) is abutted with the limit pushing block (43) and pushes the limit stop block (41) to extend, and when the ISOFIX (21) is in a storage state, the limit stop block (41) is matched with the limit block (23);

the supporting leg (3) is switched to an open state, the limit stop (41) is retracted under the action of the elastic force of the first reset piece (42), the limit stop (41) is separated from the limiting block (23), and the limit push block (43) moves inwards to reset under the action of the elastic force of the second reset piece (44).

13. The method of preventing forgetfulness of the support leg according to claim 12, characterized in that the limit stop (41) is provided with a third guide surface (411), the stopper (23) being provided with a fourth guide surface (232) adapted to cooperate with the third guide surface (411);

and switching the supporting leg (3) to a folding state, and switching the ISOFIX (21) from an extending state to a containing state, wherein the third guide surface (411) is in abutting fit with the fourth guide surface (232), the limiting block (23) pushes the limiting block (41) to move inwards until the limiting block (23) slides over the limiting block (41) to an initial position, and the limiting block (41) moves outwards under the action of the elastic force of the first reset piece (42) to extend, so that the limiting block (23) is limited to move.

14. Child safety seat, characterized by comprising a support leg anti-forgetting structure according to any of claims 1-9.