CN109305072B - child safety seat support seat - Google Patents

Abstract

The invention relates to a child safety seat support base comprising: base (1), ISOFIX mechanism (2) and supporting leg (3), ISOFIX mechanism (2) with supporting leg (3) all set up on base (1), ISOFIX mechanism (2) can be for base (1) flexible in order to connect the anchor point, still include: the misuse-preventing association mechanism can associate the telescopic state of the ISOFIX mechanism (2) with the supporting locking state of the supporting leg (3), so that the telescopic state of the ISOFIX mechanism (2) can be switched between a folding position and a stable supporting position only when the supporting leg (3) is in the storage state, and the ISOFIX mechanism (2) can be switched between the storage position and an overhanging connecting position only when the supporting leg (3) is in the supporting locking state. The invention can ensure that the supporting legs and the ISOFIX mechanism are simultaneously utilized for fixing when the safety seat is used, thereby eliminating the potential safety hazard when a user installs the safety seat.

Description

child safety seat support seat

Technical field

The present invention relates to the field of child safety seats, and in particular to a child safety seat support seat.

Background technique

A child safety seat is a seat that effectively improves the safety of children in cars by restraining them in the safety seat. In the event of a car collision or sudden deceleration, the seat can reduce the impact on children and limit their body movement to reduce injuries to them. Among the existing child safety seats, those based on the European mandatory standard ISOFIX interface are widely used.

Considering that there is a height difference between the vehicle seat plane and the interior floor, the ISOFIX interface connection alone cannot withstand the inertial force from a car collision or sudden deceleration. Therefore, many child safety seats have been designed to provide more stable support. , a support leg is provided at the front end of the support seat of the child seat to form a reliable support with the interior floor of the car, thus improving the safety protection effect of the child seat.

For users, since the installation of child safety seats involves multiple positions, it is easy for the user to fail to install parts or forget to install them due to carelessness or lack of experience. For example, the user does not adjust the support legs to a tight position during use. Install the ISOFIX interface when the vehicle is in the correct position, or the user can continue to use the support base after releasing the locking state of the support legs in the use position in a well-installed state. At this time, although the support base is in the vehicle when the vehicle is stationary or moving smoothly at a constant speed, The seat can remain stable, but when the vehicle speed changes significantly due to a collision or sharp turn, the support legs are not well pressed against the ground in the vehicle, which can easily cause the support seat to swing or overturn, causing serious problems for children. A child in a safety seat may be seriously injured or frightened.

Contents of the invention

The purpose of the present invention is to provide a child safety seat support base that can eliminate potential safety hazards for users during installation.

In order to achieve the above object, the present invention provides a child safety seat support base, including: a base, an ISOFIX mechanism and a support leg. The ISOFIX mechanism and the support leg are both arranged on the base, and the ISOFIX mechanism can telescoping relative to the base to connect the anchor point, further comprising: an anti-misuse association mechanism capable of correlating the telescopic state of the ISOFIX mechanism with the support locking state of the support leg, so that the telescopic state of the ISOFIX mechanism Only when the support legs are in the retracted state can the support legs be switched between the retracted position and the stable support position, and only when the support legs are in the support locking state can the ISOFIX mechanism be able to switch between the retracted position and the extended connection position. switch.

Further, the anti-misuse related mechanism includes a first driving structure and a second driving structure provided inside the base. The first driving structure can release the support of the ISOFIX when the supporting leg is in a stable supporting position. The second driving mechanism can lock the support legs when the ISOFIX mechanism leaves the storage position, so that the support legs are in a support locked state in the stable support position.

Further, the first driving mechanism includes a first lever mechanism, the first end of the first lever mechanism acts on the ISOFIX mechanism to limit the ISOFIX mechanism to the stowed position, the first lever The second end of the mechanism can interact with the support leg. When the support leg reaches a stable support position, it exerts force on the second end of the first lever mechanism, which is transmitted to the third end of the first lever mechanism through leverage. One end, so as to release the telescopic restriction on the ISOFIX mechanism, so that the ISOFIX mechanism can extend outward from the storage position.

Further, the rotating shaft of the first lever mechanism is arranged in the base, and a first reset mechanism is also provided on the first lever mechanism for preventing the second end of the first lever mechanism from being damaged. When the supporting leg exerts force, the first end of the first lever mechanism always acts on the ISOFIX mechanism.

Further, the ISOFIX mechanism includes an ISOFIX joint and a telescopic rod directly or indirectly connected to the ISOFIX joint. The end of the telescopic rod away from the ISOFIX joint can be moved by the first end of the first lever mechanism. Restricted to the storage position due to obstruction.

Further, the end of the telescopic rod away from the ISOFIX joint is provided with a slot with an upward opening, and the first end of the first lever mechanism moves in the up and down direction under the action of leverage, and is stuck downward. into the clamping slot to limit the telescopic rod's telescopic reach, and when upward, leaves the clamped slot to release the telescopic rod's telescopic limit.

Further, the support leg includes a leg structure and a driving member. The driving member is connected to the first end of the side on which the base is installed on the leg structure. The driving member can move the base on the leg structure. When reaching the stable support position, force is exerted on the second end of the first lever mechanism.

Further, when the driving member exerts force on the second end of the first lever mechanism, the second driving structure can lock the driving member when the ISOFIX mechanism leaves the storage position.

Further, the second driving mechanism includes a second lever mechanism and a second reset mechanism provided on the second lever mechanism. The first end of the second lever mechanism can act on the support leg, enabling the The support leg is in a support locked state in a stable support position, and the second end of the second lever mechanism abuts the ISOFIX mechanism in the storage position, and can contact the ISOFIX mechanism when the ISOFIX mechanism leaves the storage position. The ISOFIX mechanism is out of contact, and the force exerted by the second reset mechanism is transmitted to the first end of the second lever mechanism through leverage, so that the first end of the second lever mechanism moves against the support leg. to lock.

Further, the ISOFIX mechanism includes an ISOFIX joint and a telescopic rod directly or indirectly connected to the ISOFIX joint. The end of the telescopic rod away from the ISOFIX joint can abut against the second lever mechanism of the second lever mechanism in the stowed position. end, so that the second lever mechanism overcomes the force exerting effect of the second reset mechanism and maintains the unlocked state of the support leg.

Further, the support leg includes a leg structure and a driving member. The driving member is connected to the first end of the side on which the base is installed on the leg structure. The driving member can move the base on the leg structure. When reaching the stable support position, force is applied to the first driving mechanism to release the telescopic restriction of the ISOFIX mechanism by the first driving mechanism, and the first end of the second lever mechanism can be stored when the telescopic rod leaves the The driving member is locked when in position.

Further, the ISOFIX mechanism also includes a telescopic rod positioning piece, which is fixed in the base and used to provide a telescopic guide function for the telescopic rod.

Further, a rotation control rod and a stop are provided between the driving member and the first end of the leg structure, and the two ends of the rotation control rod are respectively connected with the driving member and the leg structure. The first end is connected, and the stopper supports part of the rotation control rod and the driving member.

Further, a folding groove is provided on the lower surface of the base, the support leg can rotate into the folding groove of the base, and a folding locking mechanism is provided on the second end of the support leg for supporting the ground. , can be locked and unlocked in the folded position of the support legs.

Further, the folding locking mechanism includes a concave piece installed on the second end of the support leg, and the concave piece can cooperate with a protruding structure on the folding groove corresponding to the second end of the support leg. For snapping, a third reset mechanism is provided between the concave part and the supporting leg.

Further, in the supporting locked state of the supporting legs, the inner angle between the supporting legs and the base is 75 degrees.

Based on the above technical solution, the present invention associates the telescopic state of the ISOFIX mechanism with the support locking state of the support legs through an anti-misuse association mechanism, so that the telescopic state of the ISOFIX mechanism can only be in the folded position and stable when the ISOFIX mechanism is in the stowed state. Switch between support positions, and the ISOFIX mechanism can switch between the stowed position and the extended connection position only when the support leg is in the support locking state, thus avoiding the user from adjusting the support leg to the tight use position. The installation of the ISOFIX interface will prevent the support base from swinging or overturning due to the support legs not touching the ground when the vehicle speed changes significantly due to a collision or sharp turn, thus affecting the safety of children riding on board. The child seat forms an effective protection.

Description of the drawings

The drawings described here are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a schematic exploded view of an embodiment of a child safety seat support base of the present invention.

Figure 2 is a schematic structural diagram of the support legs in a stable support position in the embodiment of the child safety seat support base of the present invention.

Figure 3 is a schematic diagram of the support leg installation structure in the embodiment of the child safety seat support base of the present invention.

Figure 4 is a schematic structural diagram of the support legs of the child safety seat support seat in the folded position according to the embodiment of the present invention.

5 is a schematic structural diagram of the child safety seat support seat according to the embodiment of the present invention after the centerline section of the support legs in the folded position.

Figure 6 is a partially enlarged schematic diagram of an embodiment of the child safety seat support base of the present invention.

Explanation of reference signs

1. Base; 2. ISOFIX mechanism; 3. Supporting legs; 4. First lever mechanism; 5. Second lever mechanism; 6. Stopper; 21. ISOFIX joint; 22. Telescopic rod; 23. Telescopic rod positioning piece; 24. Card slot; 25. Middle piece; 31. Driving block; 32. Leg structure; 33. Support foot; 34. Concave part; 35. Unlock switch; 36. Rotary control lever; 37. Third reset mechanism; 41 , the first reset mechanism; 42. connecting rod; 43. the first end of the first lever mechanism 4; 44. the second end of the first lever mechanism 4; 45. the rotating shaft of the first lever mechanism 4; 51. second reset 52. The second end of the second lever mechanism 5; 53. The first end of the second lever mechanism 5; 54. The rotating shaft of the second lever mechanism 5; 321. The first end of the leg structure 32; 322. Support The second end of the leg structure 32.

Detailed ways

The technical solution of the present invention will be further described in detail below through the accompanying drawings and examples.

As shown in FIG. 1 , it is a schematic exploded view of an embodiment of a child safety seat support base of the present invention. With reference to Figures 2-6, the child safety seat support base of this embodiment includes: a base 1, an ISOFIX mechanism 2 and a support leg 3. The base 1 is used to be arranged in a vehicle seat and to stably support the child safety seat. The ISOFIX mechanism 2 and the support legs 3 are both arranged on the base 1, and the ISOFIX mechanism 2 can telescope relative to the base 1 to connect anchor points. The ISOFIX mechanism 2 can be extended from the base 1 to connect to the ISOFIX anchor point of the vehicle, and can be retracted to the stowed position, while the support legs 3 can be rotated and folded relative to the base 1, and can be switched between the stowed position and the stable support position. .

In order to solve the problem of misuse by users during installation, this embodiment also includes an anti-misuse related mechanism. This mechanism can associate the telescopic state of the ISOFIX mechanism 2 with the support locking state of the support legs 3, so that the support legs 3 can be folded only when the telescopic state of the ISOFIX mechanism 2 is in the stowed state. Switch between the position and the stable support position, and the ISOFIX mechanism 2 can switch between the storage position and the extended connection position only when the support leg 3 is in the support locking state. The anti-misuse related mechanism can prevent users from installing the ISOFIX interface without adjusting the support legs to the tight use position. The ISOFIX mechanism and ISOFIX anchor can only be installed when the user normally rotates the support legs to a stable support position. The connection between the points realizes the stable installation of the child safety seat support seat, thereby preventing the support seat from being damaged due to the support legs not touching the ground when the vehicle speed changes significantly due to collision or sharp turn. Problems with large swings or overturning.

In order to realize the above function of the anti-misuse related mechanism, the mechanism may specifically include a first driving structure and a second driving structure provided inside the base 1 . Among them, the first driving structure can release the expansion and contraction restriction on the ISOFIX mechanism 2 when the support leg 3 is in a stable support position. The second driving mechanism can lock the support leg 3 when the ISOFIX mechanism 2 leaves the storage position, so that the support leg 3 is in a support locked state in the stable support position.

Referring to FIGS. 1-4 , the first drive mechanism includes a first lever mechanism 4 . The first end 43 of the first lever mechanism 4 acts on the ISOFIX mechanism 2 to restrict the ISOFIX mechanism 2 in the stowed position. The second end 44 of the first lever mechanism 4 can interact with the support leg. 3 interact, when the support leg 3 reaches the stable support position, it exerts force on the second end 44 of the first lever mechanism 4, which is transmitted to the first end 43 of the first lever mechanism 4 through leverage, so that It releases the telescopic restriction on the ISOFIX mechanism 2, so that the ISOFIX mechanism 2 can extend outward from the storage position. Referring to Figure 2, the driving block 31 connected to the first end 321 of the support leg 3 close to the side of the base 1 can press the second end 44 of the first lever mechanism 4 downward when the support leg 3 rotates to a stable support position. When the support leg 3 rotates to a position other than the stable support position (refer to FIG. 4 ), the driving block 31 leaves the second end 44 of the first lever mechanism 4 .

The rotating shaft 45 of the first lever mechanism 4 can be disposed in the base 1 , and a first reset mechanism 41 (for example, the tension spring used in Figure 4 , can also be provided in other embodiments). Use a compression spring or a torsion spring arranged between the rotating shaft 45 and the first lever mechanism 4, etc.). The first reset mechanism 41 can make the first end 43 of the first lever mechanism 4 always act on the ISOFIX mechanism 2 when the second end 44 of the first lever mechanism 4 is not exerted by the supporting leg 3 superior. The first lever mechanism 4 is preferably configured as two sets of lever structures that are symmetrical with respect to the center line in the left-right direction, and the two sets of lever structures are connected by a connecting rod 42 .

The ISOFIX mechanism 2 may specifically include an ISOFIX joint 21 and a telescopic rod 22 connected to the ISOFIX joint 21 . The end of the telescopic rod 22 away from the ISOFIX joint 21 can be restricted in the stowed position by the first end 43 of the first lever mechanism 4 . The restriction method is not limited to the blocking of the first end 43 of the first lever mechanism 4, and may also adopt other forms, such as magnetic attraction or snap-in. The ISOFIX joint 21 can be connected directly to the telescopic rod 22 or indirectly through the intermediate piece 25 in Figure 1 .

Referring to Figure 2, the end of the telescopic rod 22 away from the ISOFIX joint 21 is provided with a slot 24 with an upward opening. The first end 43 of the first lever mechanism 4 moves in the up and down direction under the action of leverage. When the support leg 3 does not act on the first lever mechanism 4, the first reset mechanism 41 can make the first end 43 of the first lever mechanism 4 snap downward into the slot 24 to realize the adjustment of the telescopic rod. Scaling limit of 22. When the support leg 3 acts on the first lever mechanism 4, the first end 43 of the first lever mechanism 4 moves upward to leave the slot 24 through leverage, so as to release the telescopic restriction on the telescopic rod 22. In addition, the ISOFIX mechanism 2 may also include a telescopic rod positioning piece 23, which is fixed in the base 1 and used to provide a telescopic guide function for the telescopic rod 22.

Referring to FIG. 3 , the support leg 3 includes a leg structure 32 and a driving member 31 . The driving member 31 is connected to the first end 321 of the leg structure 32 on the side where the base 1 is installed. A foot 33 may be provided at the other end of the leg structure 32 . The driving member 31 can exert force on the second end 44 of the first lever mechanism 4 when the leg structure 32 reaches a stable support position. The outer contour of the driving member 31 can match the second end 44 of the first lever mechanism 4 and can rotate together with the leg structure 32 . When the driving member 31 exerts force on the second end 44 of the first lever mechanism 4 , the second driving structure can lock the driving member 31 when the ISOFIX mechanism 2 leaves the storage position. The support leg 3 can be switched between the folded state and the support locked state. When it is in the support locked state, the internal angle between the support leg 3 and the base 1 is preferably 75 degrees to comply with relevant safety standards.

Referring to FIG. 4 , the second driving mechanism specifically includes a second lever mechanism 5 and a second reset mechanism 51 provided on the second lever mechanism 5 . The rotating shaft 54 of the second lever mechanism 5 can be disposed in the base 1 , and the second lever mechanism 5 can rotate around the rotating shaft 54 . The first end 53 of the second lever mechanism 5 can act on the support leg 3, so that the support leg 3 can be in a support locked state in a stable support position. The second end 52 of the second lever mechanism 5 abuts the ISOFIX mechanism 2 in the stowed position, and can be disengaged from the ISOFIX mechanism 2 when the ISOFIX mechanism 2 leaves the stowed position. The force exerted by the second reset mechanism 51 is transmitted to the first end 53 of the second lever mechanism 5 through leverage, so that the first end 53 of the second lever mechanism 5 moves against the support leg 3 to lock.

The driving member 31 on the supporting leg 3 can exert force on the first driving mechanism when the supporting leg structure 32 reaches a stable support position, so as to release the telescopic restriction of the ISOFIX mechanism 2 by the first driving mechanism. At this time, when the user pulls out the telescopic rod 22 in the ISOFIX mechanism 2 to leave the storage position, the first end 53 of the second lever mechanism 5 can lock the driving member 31 . Referring to Figure 2, a blocking groove or other blocking structure can be provided on the driving member 31, and the first end 53 of the second lever mechanism 5 can be inserted into the groove or blocking structure on the driving member 31 to achieve the locking effect, and Locking the driving member prevents the support leg 3 from rotating, thereby preventing the support leg from leaving the stable support position when the ISOFIX connection is in a non-disassembled state, thereby causing safety risks.

When the end of the telescopic rod 22 away from the ISOFIX joint 21 is in the stowed position, this end can abut against the second end 52 of the second lever mechanism 5 in the stowed position. Under the abutment effect, the second lever mechanism 5 The force exerted by the second reset mechanism 51 can be overcome to maintain the unlocked state of the support leg 3. At this time, the support leg can be rotated normally to achieve the disassembly of the support base.

As mentioned earlier, the driving member 31 can exert force on the first driving mechanism when the leg structure 32 reaches the stable support position, so as to release the telescopic restriction of the ISOFIX mechanism 2 by the first driving mechanism. At this time, the The first end 53 of the two lever mechanism 5 can lock the driving member 31 when the telescopic rod 22 leaves the storage position, ensuring that the support leg will not leave the stable support position.

Referring to FIGS. 3 and 6 , a rotation control rod 36 and a stopper 6 may be provided between the driving member 31 and the first end 321 of the leg structure 32 . Both ends of the rotation control rod 36 are connected to the driving member 31 and the first end 321 of the leg structure 32 respectively, and the stopper 6 partially pairs the rotation control rod 36 and the driving member 31 Provide support. By rotating the control rod 36, the driving member 31 and the leg structure 32 can maintain a relatively fixed relationship. The driving member 31 can rotate with the leg structure 32, and limiting the rotation of the driving member 31 also limits the rotation of the leg structure 32. Turn. The outer contour of the stopper 6 can be designed according to the outer contours of the driving member 31 and the rotating control rod 36 to maintain the connection and support relationship between the base 1 and the supporting leg 3 .

Referring to Figure 5, a folding groove 11 can be provided on the lower surface of the base 1, and the support legs 3 can rotate into the folding groove 11 of the base 1 to reduce the occupied space after folding and make the The bottom profile is flatter for easier placement. The second end 322 of the support leg 3 for supporting the ground can be provided with a folding locking mechanism accordingly, through which the folding position of the support leg 3 can be locked and unlocked. Figure 5 shows a specific structural form of a folding locking mechanism, which includes a concave part 34 installed on the second end 322 of the support leg 3. The concave part 34 can engage with the folding groove 11 The protruding structure 12 corresponding to the second end 322 of the supporting leg 3 cooperates for snap-fitting, and a third reset mechanism 37 is provided between the concave member 34 and the supporting leg 3 . The third reset mechanism 37 can push the concave part 34 outward to maintain the clamping state between the concave part 34 and the protruding structure 12 to prevent the support leg 3 from falling naturally. When the user wants to take out the leg structure 32 from the folding groove 11 , he can overcome the force of the third reset mechanism 37 by operating the unlocking switch 35 on the leg 33 so that the concave part 34 leaves the protruding structure 12 Snap position. In other embodiments, the support legs 3 can also be directly rotated to the lower surface of the base 1 and form a downward bulge. Other forms of folding and locking mechanisms can also be used to prevent the support legs 3 from falling naturally.

The specific usage process and the principle of preventing misuse will be described in detail below with reference to the embodiment of the child safety seat support shown in Figures 1-6.

Before the user is ready to install the child safety seat support seat of the present invention on the seat of the vehicle, the state of the child safety seat support seat is as shown in Figures 4 and 5. At this time, the leg structure 32 of the support leg 3 is folded in the folding groove 11 on the lower surface of the base 1, and is kept from falling naturally by the folding locking mechanism, while the ISOFIX mechanism 2 is also in the folded position, and the driving block 31 There is no action on the second end 44 of the first lever mechanism 4, so under the action of the first reset mechanism 41, the first end 43 of the first lever mechanism 4 blocks the end of the telescopic rod 22 of the ISOFIX mechanism 2, causing it to Cannot be pulled out.

When the user is ready to install the support base, the user can only operate the support leg 3 first to rotate the support leg 3 downward from the folded position relative to the base 1 to reach a stable support position, while the ISOFIX mechanism 2 is at this time. The restricted state cannot be unplugged. Only when the support leg 3 reaches the stable support position, can the driving block 31 exert force on the second end 44 of the first lever mechanism 4 to overcome the effect of the first reset mechanism 41, and the first lever mechanism 4 can be moved by lever action. The first end 43 leaves the blocking position for the end of the telescopic rod 22 .

As shown in Figure 2, only then can the user pull out the telescopic rod 22 to connect the ISOFIX joint 21 with the ISOFIX anchor point on the vehicle. When the telescopic rod 22 is pulled out, the end of the telescopic rod 22 also leaves the blocking and restricting position of the second end 52 of the second lever mechanism 5 , and the second lever mechanism 5 is under the action of the second reset mechanism 51 The first end 53 is inserted into the groove on the driving block 31 to restrict the movement of the driving block 31 and thereby lock the stable supporting state of the supporting leg 31 . In other words, as long as the telescopic rod 22 leaves the storage position, the support legs 31 will be locked in the stable support position no matter how far it extends outwards, so as to prevent the user from not noticing whether the support legs 31 are correctly installed during installation.

When the user wants to remove the child safety seat support from the vehicle seat, he needs to first release the connection between the ISOFIX connector 21 and the ISOFIX anchor point, and retract the telescopic rod 22 inwardly to the storage position. In the stowed position, the end of the telescopic rod 22 can act on the second end 52 of the second lever mechanism 5, so that the second lever mechanism 5 overcomes the action of the second reset mechanism 51, and the first end can be moved through the leverage. 51 is pulled out from the groove of the driving block 31 to release the restriction on the driving block 31. Only then can the user rotate and recover the support leg 3 . In other words, the support leg 3 is allowed to leave the stable support position only when the telescopic rod 22 is retracted to the stowed position.

It can be understood from the structural implementation of the various embodiments of the child safety seat support seat of the present invention that the user must follow a specific sequence whether installing or disassembling under the limitations of this structure, and this sequence prevents the support legs from being The opportunity for the support base to be in an unstable support state when it is installed eliminates the possibility that the user will mistakenly install the support legs in an unclamped state due to unskilled or careless users, thus ensuring that the support legs are installed in the support base. The support seat is always pressed against the ground in the car. Even if the vehicle is in a collision or sudden turn, resulting in a large change in vehicle speed, the support seat can be effectively pressed against the ground in the car to avoid large swings or overturning, thereby protecting the safety of children riding in the car. children in the seat to prevent them from being seriously injured or frightened.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the present invention can still be modified Modifications to the specific embodiments of the invention or equivalent substitutions of some of the technical features without departing from the spirit of the technical solution of the present invention shall be covered by the scope of the technical solution claimed by the present invention.

Claims (15)

1. A child safety seat support base, including: a base (1), an ISOFIX mechanism (2) and a support leg (3). The ISOFIX mechanism (2) and the support leg (3) are both arranged on the On the base (1), the ISOFIX mechanism (2) can telescope relative to the base (1) to connect the anchor point. It is characterized in that it also includes: an anti-misuse related mechanism that can move the ISOFIX mechanism (2) The telescopic state is associated with the support locking state of the support leg (3), so that the telescopic state of the ISOFIX mechanism (2) can only be in the folded position and stable when the ISOFIX mechanism (2) is in the stowed state. Switching between support positions, and the ISOFIX mechanism (2) can switch between the stowed position and the extended connection position only when the support leg (3) is in the support locked state; Wherein, the anti-misuse related mechanism includes a first drive structure provided inside the base (1), and the first drive structure can release the ISOFIX when the support leg (3) is in a stable support position. The telescopic limit of the mechanism (2); the first driving structure includes a first lever mechanism (4), and the first end (43) of the first lever mechanism (4) acts on the ISOFIX mechanism (2), For constraining the ISOFIX mechanism (2) in the stowed position, the second end (44) of the first lever mechanism (4) can interact with the support leg (3), and the support leg (3) When reaching the stable support position, a force is applied to the second end (44) of the first lever mechanism (4), and is transmitted to the first end (43) of the first lever mechanism (4) through leverage, so that it The telescopic restriction on the ISOFIX mechanism (2) is released, so that the ISOFIX mechanism (2) can extend outward from the storage position. 2. The child safety seat support base according to claim 1, characterized in that the rotating shaft of the first lever mechanism (4) is arranged in the base (1), and the first lever mechanism (4) is 4) is also provided with a first reset mechanism (41) for making the second end (44) of the first lever mechanism (4) not receive the force exerted by the support leg (3). The first end (43) of the first lever mechanism (4) always acts on the ISOFIX mechanism (2). 3. The child safety seat support seat according to claim 1, characterized in that the ISOFIX mechanism (2) includes an ISOFIX joint (21) and a telescopic rod (21) directly or indirectly connected to the ISOFIX joint (21). 22), the end of the telescopic rod (22) away from the ISOFIX joint (21) can be restricted in the stowed position by the blocking effect of the first end (43) of the first lever mechanism (4). 4. The child safety seat support base according to claim 3, characterized in that the end of the telescopic rod (22) away from the ISOFIX joint (21) is provided with a slot (24) with an upward opening, The first end (43) of the first lever mechanism (4) moves in the up and down direction under the action of leverage, and is clamped downward into the slot (24) to realize the movement of the telescopic rod (22). telescopic limit, and leaves the slot (24) when upward to release the telescopic limit on the telescopic rod (22). 5. The child safety seat support seat according to claim 1, characterized in that the support leg (3) includes a leg structure (32) and a driving part (31), and the driving part (31) and the The first end (321) of the side on which the base (1) is installed is connected to the leg structure (32), and the driving member (31) can adjust the position of the leg structure (32) when it reaches a stable support position. The second end (44) of the first lever mechanism (4) applies force. 6. The child safety seat support base according to claim 5, characterized in that the driving member (31) exerts force on the second end (44) of the first lever mechanism (4). , the second driving structure can lock the driving member (31) when the ISOFIX mechanism (2) leaves the storage position. 7. The child safety seat support base according to claim 1, characterized in that the anti-misuse related mechanism further includes a second driving structure provided inside the base (1), the second driving structure The support leg (3) can be locked when the ISOFIX mechanism (2) leaves the storage position, so that the support leg (3) is in a support locked state at the stable support position. 8. The child safety seat support base according to claim 7, characterized in that the second driving structure includes a second lever mechanism (5) and a second lever provided on the second lever mechanism (5). Reset mechanism (51), the first end (53) of the second lever mechanism (5) can act on the support leg (3), so that the support leg (3) can be in a support lock state in a stable support position. state, the second end (52) of the second lever mechanism (5) abuts the ISOFIX mechanism (2) in the storage position, and can contact the ISOFIX mechanism (2) when it leaves the storage position. The ISOFIX mechanism (2) is out of contact, and the force exerted by the second reset mechanism (51) is transmitted to the first end (53) of the second lever mechanism (5) through leverage, so that the third The first end (53) of the two lever mechanisms (5) locks the support legs (3). 9. The child safety seat support seat according to claim 8, characterized in that the ISOFIX mechanism (2) includes an ISOFIX joint (21) and a telescopic rod (21) directly or indirectly connected to the ISOFIX joint (21). 22), the end of the telescopic rod (22) away from the ISOFIX joint (21) can abut the second end (52) of the second lever mechanism (5) in the stowed position, so that the second lever The mechanism (5) overcomes the force exerted by the second reset mechanism (51) and maintains the unlocked state of the support leg (3). 10. The child safety seat support seat according to claim 9, characterized in that the support leg (3) includes a leg structure (32) and a driving part (31), and the driving part (31) is connected with the The first end (321) of the side on which the base (1) is installed is connected to the leg structure (32), and the driving member (31) can adjust the position of the leg structure (32) when it reaches a stable support position. The first driving structure exerts force to release the telescopic restriction of the ISOFIX mechanism (2) by the first driving structure, and the first end (53) of the second lever mechanism (5) can be in the telescopic position. When the rod (22) leaves the storage position, the driving member (31) is locked. 11. The child safety seat support seat according to claim 3 or 9, characterized in that the ISOFIX mechanism (2) further includes a telescopic rod positioning piece (23), and the telescopic rod positioning piece (23) is fixed on The base (1) is used to provide a telescopic guide function for the telescopic rod (22). 12. The child safety seat support base according to claim 5 or 10, characterized in that there is a first end (321) between the driving member (31) and the leg structure (32). Rotating control lever (36) and stopper (6). Both ends of the rotating control lever (36) are connected to the driving member (31) and the first end (321) of the leg structure (32) respectively. , and the stopper (6) supports part of the rotation control rod (36) and the driving member (31). 13. The child safety seat support seat according to claim 5 or 10, characterized in that a folding groove (11) is provided on the lower surface of the base (1), and the support leg (3) can rotate Entering the folding groove (11) of the base (1), the second end (322) of the support leg (3) for supporting the ground is provided with a folding locking mechanism, which can locked and unlocked in the folded position. 14. The child safety seat support base according to claim 13, characterized in that the folding locking mechanism includes a concave piece (34) installed at the second end (322) of the support leg (3) , the concave part (34) can be engaged with the protruding structure (12) corresponding to the second end (322) of the support leg (3) on the collapsing groove (11), and in the A third reset mechanism (37) is also provided between the concave part (34) and the support leg (3). 15. The child safety seat support seat according to claim 1, characterized in that in the support locked state of the support leg (3), there is a gap between the support leg (3) and the base (1). The internal angle is 75 degrees.