ISOFIX mechanism and safety seat

Abstract

The present invention provides an ISOFIX mechanism and a safety seat, relating to the technical field of safety seats. In the event of a rear-end collision, an inertial movable part in the ISOFIX mechanism moves due to inertia and drives a locking part to lock an arm shell relative to a sleeve body. Under the action of inertia, the ISOFIX mechanism swings obliquely upward relative to the ISOFIX anchor point of the vehicle. The gravity of the safety seat and the occupant, as well as the reaction force of the vehicle seat on the safety seat, jointly consume the impact kinetic energy of the rear-end collision, transferring the impact kinetic energy that causes the occupant's head and torso to swing in the driving direction. This can better prevent injuries to the occupant's spine and head caused by rear-end collisions, and in particular can reduce injuries to the neck and head of child occupants caused by acceleration energy impact due to rapid swinging.

Description

Technical Field

[0001] The present invention relates to the technical field of safety seats, and in particular to an ISOFIX mechanism and a safety seat. Background Art

[0002] When a child seat is connected to a vehicle's ISOFIX anchor points via the ISOFIX mechanism, the child seat is essentially fixed relative to the vehicle. Furthermore, the ISOFIX mechanism typically locks the arm shell in a one-way manner relative to the sleeve, meaning the arm shell can retract but not extend relative to the sleeve. As long as the child seat is in contact with the vehicle seat backrest, the child seat remains stable relative to the vehicle seat.

[0003] When a vehicle is hit from behind, the ISOFIX mechanism's arm shell unlocks and contracts relative to the sleeve, causing the safety seat to press against the elastic portion of the car seat back. This can mitigate the impact somewhat, but at the moment of impact, a child facing the rear of the vehicle in the safety seat will be disengaged from the seat back due to inertia, causing their head and torso to swing rapidly backward. During this process, the acceleration of the child's spine and head changes dramatically, which can easily cause physical damage to the child's spine and head. Because the damage caused by the occupant's head swinging due to inertia and impact is far more serious than the damage caused by the impact in the direction of travel, previous safety seats have had the technical problem of not being able to mitigate neck injuries in rear-end collisions. Summary of the Invention

[0004] The present invention aims to provide an ISOFIX mechanism and a safety seat, which can automatically lock the arm shell and the sleeve body in the event of a rear-end collision, thereby utilizing inertia to cause the ISOFIX mechanism to swing obliquely upward relative to the vehicle's ISOFIX anchor point. As a result, the impact kinetic energy of the rear-end collision is consumed by the gravity of the safety seat, the occupant, and the reaction force of the vehicle seat on the safety seat, thereby better preventing the occupant's spine and head from being damaged by the rear-end collision.

[0005] In a first aspect, the present invention provides an ISOFIX mechanism comprising: an arm housing, a sleeve body, a locking member, and an inertial movable member;

[0006] The arm housing has a joint end for connecting to a vehicle, and the sleeve is slidably connected to the arm housing along the driving direction;

[0007] The locking member is movably connected to the arm housing, the sleeve body has a locking position adapted to the locking member, and the inertial movable member is in transmission cooperation with the locking member;

[0008] When the locking member is in an unlocked state, the inertial movable member has a movable space relative to the arm housing in the opposite direction of driving;

[0009] When the inertial movable part deviates relative to the arm housing in the opposite direction of driving to reach a set stroke, the inertial movable part drives the locking part to engage with the locking position.

[0010] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein the locking member is hinged to the arm housing;

[0011] The inertial movable member abuts against the end surface of the locking member away from the locking position;

[0012] The end surface of the locking member opposite to the inertial movable member is inclined in a direction away from the locking position along the reverse direction of driving.

[0013] In combination with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the movable end of the locking member has a lock hook protrusion adapted to the locking position, and has a counterweight portion protruding away from the lock hook protrusion.

[0014] In combination with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the hinged end and the movable end of the locking member are arranged in sequence along the driving direction, and when the locking member is in the unlocked state, the inertial movable member abuts against the counterweight part.

[0015] In combination with the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein a first elastic member is installed between the arm shell and the locking member, and the first elastic member has a tendency to switch the locking member from a locked state to an unlocked state.

[0016] In combination with the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the engagement end of the arm housing is equipped with a latch adapted to a vehicle ISOFIX anchor point;

[0017] The arm housing is movably provided with a locking link, a second elastic member is connected between the locking link and the latching teeth, and the second elastic member has a tendency to switch the locking link from an unlocked state to a self-locked state;

[0018] When the locking link is in a locked state, the locking link cooperates with and locks the latching teeth;

[0019] When the locking link is in an unlocked state, the locking link is disengaged from the latching teeth;

[0020] The inertial movable member is slidably connected to the locking connecting rod.

[0021] In combination with the fifth possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein one end of the second elastic member is connected to the locking link, and the other end is connected to the latch tooth, and the second elastic member drives the latch tooth and causes the latch tooth to tend to unlock.

[0022] In combination with the fifth possible implementation manner of the first aspect, the present invention provides a seventh possible implementation manner of the first aspect, wherein the latching tooth shaft is hinged to the arm housing, and the latching tooth comprises an anchor hook portion, a first protrusion portion, and a second protrusion portion, wherein the anchor hook portion, the first protrusion portion, and the second protrusion portion are sequentially spaced apart around the hinge axis of the latching tooth;

[0023] When the latch is in an unlocked state, the anchor hook portion gives way relative to the connection groove of the engagement end, the first protrusion extends into the connection groove of the engagement end, and the locking link abuts against the end surface of the second protrusion facing away from the hinge axis of the latch;

[0024] When the latch is in the locked state, the vehicle ISOFIX anchor pushes against the first protrusion to allow the anchor hook to be hooked on the vehicle ISOFIX anchor, and the locking link switches to the locked state and locks the second protrusion.

[0025] In combination with the fifth possible implementation manner of the first aspect, the present invention provides an eighth possible implementation manner of the first aspect, wherein a shift member is mounted on the arm housing, and the locking link is located between the shift member and the latching tooth;

[0026] A third elastic member is installed between the shift member and the arm housing, and the third elastic member has a tendency to switch the shift member from an unlocked state to a locked state;

[0027] When the shift member is in a locked state, the shift member is clamped to the sleeve;

[0028] When the sleeve is retracted along the arm housing, the sleeve drives the shift member to switch from a locked state to an unlocked state.

[0029] In a second aspect, the safety seat provided by the present invention is equipped with the ISOFIX mechanism described in the first aspect.

[0030] In a third aspect, the present invention provides a safety seat comprising: a seat base, a first connector and a second connector;

[0031] The first connector and the second connector are spaced apart from each other along the left-to-right direction of the seat base, and the first connector and the second connector are respectively connected to the seat base;

[0032] One of the first connector and the second connector includes the ISOFIX mechanism provided in the first aspect, and the other is configured as a retractable ISOFIX mechanism.

[0033] The embodiments of the present invention bring the following beneficial effects: the sleeve is connected to the arm shell by sliding in the driving direction, the locking piece is movably connected to the arm shell, the sleeve has a locking position adapted to the locking piece, the inertial movable piece and the locking piece are in transmission cooperation, and when the locking piece is in the unlocked state, the inertial movable piece has a movable space relative to the arm shell in the opposite direction of driving, when the inertial movable piece deviates relative to the arm shell in the opposite direction of driving to reach a set stroke, the inertial movable piece drives the locking piece to cooperate with the locking position, and in the event of a rear-end collision, the inertial movable piece moves due to inertia and drives the locking piece to lock the arm shell relative to the sleeve. Therefore, the ISOFIX mechanism can be regarded as a swing arm around the vehicle's ISOFIX anchor point. Under the action of inertia, the ISOFIX mechanism swings obliquely upward relative to the vehicle's ISOFIX anchor point. The gravity of the safety seat and the occupant, as well as the reaction force of the vehicle seat on the safety seat, jointly consume the impact kinetic energy of the rear-end collision, and transfer the impact kinetic energy that causes the occupant's head and torso to swing in the driving direction. This can better prevent injuries to the occupant's spine and head caused by rear-end collisions, and especially can reduce injuries to the child occupant's neck and head caused by acceleration energy impact due to rapid swinging.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 An exploded diagram of the ISOFIX mechanism and vehicle ISOFIX anchor point provided by an embodiment of the present invention;

[0037] Figure 2 A cross-sectional view of an ISOFIX mechanism provided in an embodiment of the present invention;

[0038] Figure 3 An exploded view of the locking member and the inertial moving member of the ISOFIX mechanism provided in an embodiment of the present invention;

[0039] Figure 4 A cross-sectional view of the ISOFIX mechanism and vehicle ISOFIX anchor points in normal use;

[0040] Figure 5 A cross-sectional view of the ISOFIX mechanism and the vehicle's ISOFIX anchor point when the vehicle is rear-ended;

[0041] Figure 6 This is a cross-sectional view of the ISOFIX mechanism and the vehicle's ISOFIX anchor point after a rear-end collision;

[0042] Figure 7 A top view of the seat base, first connector, and second connector of a safety seat provided in an embodiment of the present invention.

[0043] Icon: 001-arm shell; 101-joining end; 002-sleeve; 201-locking position; 003-locking member; 301-lock hook protrusion; 302-counterweight; 004-inertial moving member; 401-slot; 005-first elastic member; 006-grip; 601-anchor hook; 602-first protrusion; 603-second protrusion; 007-locking link; 008-second elastic member; 009-gear member; 010-third elastic member; 011-vehicle ISOFIX anchor point; 012-seat base; 013-first connector; 014-second connector. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, unless separately marked, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0046] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0047] like Figure 1 and Figure 2 As shown, the ISOFIX mechanism provided by the embodiment of the present invention includes: an arm shell 001, a sleeve body 002, a locking member 003 and an inertial movable member 004; the arm shell 001 has a joint end 101 for connecting to the vehicle, and the sleeve body 002 is slidably connected to the arm shell 001 along the driving direction a; the locking member 003 is movably connected to the arm shell 001, the sleeve body 002 has a locking position 201 adapted to the locking member 003, and the inertial movable member 004 is in transmission cooperation with the locking member 003.

[0048] It should be noted that the ISOFIX mechanism described in this embodiment is compatible with a standard vehicle ISOFIX anchor point 011. According to the national standard, the vehicle ISOFIX anchor point 011 has a rod extending horizontally and perpendicular to the driving direction a. The engagement end 101 of the arm shell 001 engages with the rod of the vehicle ISOFIX anchor point 011, thereby enabling swinging about the rod. Because the safety seat is fitted to the vehicle seat during installation and is typically supported by the elastic portion of the vehicle seat backrest, the ISOFIX mechanism swings relative to the vehicle seat in a rear-end collision, and this swinging angle range is cushioned and limited by the vehicle seat. This makes the technical solution described in this embodiment theoretically sound and has achieved the expected technical results in collision tests.

[0049] When locking member 003 is unlocked, inertial movable member 004 has a free range relative to arm housing 001 in the direction b opposite to vehicle travel. In a feasible embodiment, inertial movable member 004 can be suspended and mounted within arm housing 001 via an elastic member. Alternatively, inertial movable member 004 can be pivotally connected to arm housing 001, with its center of gravity offset from the pivot axis. Thus, in the event of a rear-end collision, inertial movable member 004 can move due to inertia, thereby achieving a free range relative to arm housing 001 in the direction b opposite to vehicle travel.

[0050] In this embodiment, the inertial movable part 004 is slidably connected to the arm housing 001, or the inertial movable part 004 is slidably connected to the locking link 007. When subjected to a rear-end collision, the inertial movable part 004 can slide in the opposite direction b of the driving due to inertia.

[0051] When the inertial movable part 004 deflects relative to the arm housing 001 in the reverse direction b to a set stroke, the set stroke is determined by the dimensions and mounting positions of the relevant components and can be in accordance with the following technical standards: when the inertial movable part 004 drives the locking part 003 to engage with the locking latch 201, the inertial movable part 004 moves in the reverse direction b to the limit of its movable stroke, thereby allowing the inertial movable part 004 to reach the limit position and completely lock the locking part 003. Of course, it is not ruled out that when the inertial movable part 004 drives the locking part 003 to engage with the locking latch 201, the inertial movable part 004 still has room for movement in the reverse direction b, and the locking part 003 can restrict the inertial movable part 004 from continuing to move in the reverse direction b.

[0052] like Figure 1 、 Figure 2 and Figure 3 As shown, in an embodiment of the present invention, the locking member 003 is hinged to the arm housing 001; the inertial movable member 004 abuts against the end face of the locking member 003 away from the locking position 201; and the end faces of the locking member 003 and the inertial movable member 004 opposite to each other in the opposite direction of driving are inclined in the direction away from the locking position 201.

[0053] When a vehicle equipped with the ISOFIX mechanism is rear-ended, the inertial movable member 004 slides in the opposite direction b of driving due to inertia. The inertial movable member 004 pushes the locking member 003 along the above-mentioned inclined surface, thereby pushing the locking member 003 toward the locking position 201, thereby accelerating the locking action of the locking member 003.

[0054] In a preferred embodiment, the hinged end and the movable end of the locking member 003 are arranged in sequence along the driving direction a, and the inertial movable member 004 moving along the opposite driving direction b gradually approaches the hinged end of the locking member 003, thereby gradually increasing the angle at which the locking member 003 is driven to swing per unit stroke of the inertial movable member 004, thereby accelerating the locking efficiency of the locking member 003.

[0055] Furthermore, the movable end of the locking member 003 has a lock hook protrusion 301 adapted to the locking position 201, and has a counterweight portion 302 protruding away from the lock hook protrusion 301. After the movable end is weighted, it is beneficial to accelerate and improve the response of the locking member 003.

[0056] Furthermore, when the locking member 003 is in the unlocked state, the inertial movable member 004 abuts against the counterweight portion 302. In this case, the counterweight portion 302 can also have the function of limiting the stroke of the inertial movable member 004, thereby improving the compactness of the device structure and helping to reduce the manufacturing cost of the device.

[0057] like Figure 1 and Figure 2As shown, a first elastic member 005 is installed between the arm housing 001 and the locking member 003. The first elastic member 005 has a tendency to switch the locking member 003 from the locked state to the unlocked state. The first elastic member 005 can be a torsion spring, a compression spring, or a tension spring. The first elastic member 005 acts on the locking member 003, thereby providing power for the locking member 003 to switch to the unlocked state.

[0058] like Figure 1 、 Figure 2 and Figure 4 As shown, the joint end 101 of the arm housing 001 is equipped with a latch 006 adapted to the vehicle's ISOFIX anchor point 011. The arm housing 001 is movably equipped with a locking link 007. A second elastic member 008 is connected between the locking link 007 and the latch 006. The second elastic member 008 has a tendency to switch the locking link 007 from an unlocked state to a locked state. The second elastic member 008 can be a torsion spring, a compression spring, or a tension spring.

[0059] When the locking link 007 is in the locked state, the locking link 007 cooperates with and locks the tooth 006. The locking link 007 can lock the tooth 006 in the locked state, so that the tooth 006 remains fixed to the vehicle ISOFIX anchor point 011, thereby ensuring that the ISOFIX mechanism is firmly connected to the vehicle.

[0060] When the locking link 007 is in the unlocked state, the locking link 007 is disengaged from the latching tooth 006 , and the latching tooth 006 is unlocked under the action of the second elastic member 008 .

[0061] The inertial moving part 004 is provided with a slot 401 , and the locking link 007 passes through the slot 401 , thereby achieving a sliding connection between the inertial moving part 004 and the locking link 007 , thereby eliminating the need for additional supporting parts or opening a slide groove for installing the inertial moving part 004 .

[0062] Furthermore, one end of the second elastic member 008 is connected to the locking link 007, and the other end is connected to the latch 006. The second elastic member 008 actuates the latch 006, causing it to unlock. The second elastic member 008 is preferably a tension spring or elastic tendon. However, if the locking link 007 is repositioned relative to the latch 006, a compression spring or other device can also be used as the second elastic member 008. The second elastic member 008 acts on both the latch 006 and the locking link 007, eliminating the need for separate return elastic members for the latch 006 and the locking link 007, thereby improving the compactness of the structure.

[0063] Furthermore, the latch 006 is hinged to the arm housing 001, and the latch 006 has an anchor hook 601, a first protrusion 602 and a second protrusion 603. The anchor hook 601, the first protrusion 602 and the second protrusion 603 are arranged in sequence around the hinge axis of the latch 006.

[0064] See also Figure 1 and Figure 2 When the latch 006 is in the unlocked state, the anchor hook 601 gives way relative to the connecting groove of the joint end 101, the first protrusion 602 extends into the connecting groove of the joint end 101, and the locking link 007 abuts against the end surface of the hinge axis of the second protrusion 603 away from the latch 006.

[0065] See also Figure 1 、 Figure 4 、 Figure 5 and Figure 6 As shown, when the latch 006 is in the locked state, the vehicle ISOFIX anchor point 011 pushes against the first protrusion 602 to make the anchor point hook 601 hooked on the vehicle ISOFIX anchor point 011 , and the locking link 007 switches to the locked state and locks the second protrusion 603 .

[0066] like Figure 1 、 Figure 2 and Figure 4 As shown, a shift member 009 is mounted on the arm housing 001, and a locking link 007 is located between the shift member 009 and the latch 006. A third elastic member 010 is mounted between the shift member 009 and the arm housing 001. The third elastic member 010 has a tendency to switch the shift member 009 from an unlocked state to a locked state. The third elastic member 010 can be an elastic device such as a torsion spring, a compression spring, or a tension spring to drive the shift member 009 to lock and maintain the locked state in the absence of external force.

[0067] See also Figure 4 and Figure 6 When the shift member 009 is in the locked state, the shift member 009 is clamped to the sleeve 002. At this time, if the arm shell 001 is subjected to force and tends to be stretched toward the outside of the sleeve 002, the force transmitted to the shift member 009 by the sleeve 002 will cause the shift member 009 to tend to deviate from the unlocked state, thereby keeping the shift member 009 stably in the locked state, thereby ensuring that the telescopic size of the arm shell 001 and the sleeve 002 will not increase.

[0068] See also Figure 5When a vehicle equipped with an ISOFIX mechanism according to any of the aforementioned embodiments is rear-ended, the safety seat and the sleeve 002 connected to the safety seat move in the opposite direction (b) of travel. Sleeve 002 contracts along arm shell 001, acting on shift member 009 in the unlocking direction. Thus, sleeve 002 can drive shift member 009 from a locked state to an unlocked state. During ISOFIX installation, sleeve 002 contracts along arm shell 001, ensuring the safety seat meets installation requirements and pushing the safety seat against the elastic padding of the vehicle seat, thereby limiting the angular travel of the safety seat's swing-up motion. When a rear-end collision occurs, although the gear member 009 can be unlocked, the inertial movable member 004 can use inertia to drive the locking member 003, and the locking member 003 quickly locks the sleeve 002, thereby keeping the arm shell 001 fixed relative to the sleeve 002 at the moment of the rear-end collision. Under the action of inertia, the ISOFIX mechanism will only swing obliquely upward relative to the vehicle ISOFIX anchor point 011. The gravity of the safety seat, the occupant and the reaction force of the vehicle seat on the safety seat jointly consume the impact kinetic energy of the rear-end collision, and slow down the tendency of the occupant to be guided towards the vehicle seat back due to inertia, which can better prevent the occupant's spine and head from being injured in a rear-end collision, and especially reduce the damage to the neck and head of child occupants caused by the acceleration energy impact due to rapid swinging.

[0069] The safety seat provided in the embodiments of the present invention is equipped with the ISOFIX mechanism described in any of the aforementioned embodiments. The safety seat in the embodiments of the present invention possesses the technical advantages of the aforementioned ISOFIX mechanism, which will not be further elaborated here. It should be noted that this safety seat is not limited to rear-mounted safety seats; the ISOFIX mechanism can also be configured in upright safety seats, 360-degree rotating safety seats, and reversible safety seats.

[0070] like Figure 1 and Figure 7 As shown, in another embodiment, the safety seat includes: a seat base 012, a first connector 013 and a second connector 014; the first connector 013 and the second connector 014 are spaced apart from each other along the left to right direction of the seat base 012, and the first connector 013 and the second connector 014 are respectively connected to the seat base 012.

[0071] One of the first connector 013 and the second connector 014 includes the ISOFIX mechanism described in any of the above embodiments, and the other is configured as a retractable ISOFIX mechanism. The retractable ISOFIX mechanism can be understood as relying on external force or built-in elastic devices to enable it to retract to reduce its length. The retractable ISOFIX mechanism can also be understood as having a structure similar to the ISOFIX mechanism described in the above embodiment, but the locking member 003 and the inertial movable member 004 are omitted in the retractable ISOFIX mechanism. When a rear-end collision occurs, the retractable ISOFIX mechanism retracts to shorten its length, and the other locked member 003 in the first connector 013 and the second connector 014 is locked, thereby maintaining the length dimension unchanged. At this time, the safety seat will twist left and right. The safety seat can also be regarded as swinging around an axis extending in the plumb direction with the connection point of the latch 006 of the ISOFIX mechanism with the locking member 003 and the inertial movable member 004 as the fulcrum. The amplitude of the swing is limited by the retracted size of the retracted ones of the first connector 013 and the second connector 014 and the reaction force provided by the car seat back. As the safety seat twists left and right, the energy that throws the safety seat and the child upward can be further released and consumed. When the occupants are thrown upward and then fall back in a rear-end collision, the impact damage between the head and the safety seat is reduced. Especially for safety seats with support legs, the reverse energy impact generated when the support legs fall to the vehicle floor can be effectively reduced, thereby better protecting the occupants' spine and head.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 mechanism, characterized in that: include: An arm shell (001), a sleeve body (002), a locking member (003) and an inertial moving member (004); The arm housing (001) has a joint end (101) for connecting to a vehicle, and the sleeve (002) is slidably connected to the arm housing (001) along the driving direction; The locking member (003) is movably connected to the arm housing (001), the sleeve (002) has a locking position (201) adapted to the locking member (003), and the inertial movable member (004) is in transmission cooperation with the locking member (003); When the locking member (003) is in an unlocked state, the inertial movable member (004) has a movable empty area relative to the arm housing (001) in the reverse direction of driving; When the inertial movable part (004) deviates relative to the arm housing (001) in the opposite direction of driving and reaches a set stroke, the inertial movable part (004) drives the locking part (003) to engage with the locking position (201).

2. The ISOFIX mechanism according to claim 1, characterized in that: The locking member (003) is hinged to the arm housing (001); The inertial movable part (004) abuts against the end surface of the locking part (003) facing away from the locking position (201); The end surfaces of the locking member (003) and the inertial movable member (004) opposite to each other in the reverse direction of driving are inclined in a direction away from the locking position (201).

3. The ISOFIX mechanism according to claim 2, characterized in that: The movable end of the locking member (003) has a locking hook protrusion (301) adapted to the locking position (201), and has a counterweight portion (302) protruding away from the locking hook protrusion (301).

4. The ISOFIX mechanism according to claim 3, characterized in that: The hinged end and the movable end of the locking member (003) are sequentially arranged along the driving direction, and when the locking member (003) is in an unlocked state, the inertial movable member (004) abuts against the counterweight portion (302).

5. The ISOFIX mechanism according to any one of claims 1 to 4, characterized in that: A first elastic member (005) is installed between the arm housing (001) and the locking member (003), and the first elastic member (005) has a tendency to switch the locking member (003) from a locked state to an unlocked state.

6. The ISOFIX mechanism according to claim 1, characterized in that: The engaging end (101) of the arm housing (001) is provided with a latch (006) adapted to the vehicle ISOFIX anchor point (011); The arm housing (001) is movably provided with a locking link (007), a second elastic member (008) is connected between the locking link (007) and the latching tooth (006), and the second elastic member (008) has a tendency to switch the locking link (007) from an unlocked state to a self-locked state; When the locking link (007) is in a locked state, the locking link (007) cooperates with and locks the latching tooth (006); When the locking link (007) is in an unlocked state, the locking link (007) is disengaged from the latching tooth (006); The inertial movable member (004) is slidably connected to the locking connecting rod (007).

7. The ISOFIX mechanism according to claim 6, characterized in that: One end of the second elastic member (008) is connected to the locking link (007), and the other end is connected to the latching tooth (006). The second elastic member (008) drives the latching tooth (006) and causes the latching tooth (006) to tend to unlock.

8. The ISOFIX mechanism according to claim 6 or 7, characterized in that: The latch (006) is hinged to the arm housing (001) and comprises an anchor hook (601), a first protrusion (602) and a second protrusion (603). The anchor hook (601), the first protrusion (602) and the second protrusion (603) are sequentially arranged at intervals around the hinge axis of the latch (006). When the latch (006) is in an unlocked state, the anchor hook (601) gives way relative to the connection groove of the joint end (101), the first protrusion (602) extends into the connection groove of the joint end (101), and the locking link (007) abuts against the end surface of the hinge axis of the second protrusion (603) facing away from the latch (006); When the latching tooth (006) is in a locked state, the vehicle ISOFIX anchor point (011) pushes against the first protrusion (602) to allow the anchor point hook (601) to be hooked on the vehicle ISOFIX anchor point (011), and the locking link (007) switches to a locked state and locks the second protrusion (603).

9. The ISOFIX mechanism according to claim 6 or 7, characterized in that: A shift piece (009) is mounted on the arm housing (001), and the locking link (007) is located between the shift piece (009) and the latching tooth (006); A third elastic member (010) is installed between the shift member (009) and the arm housing (001), and the third elastic member (010) has a tendency to switch the shift member (009) from an unlocked state to a locked state; When the shift member (009) is in a locked state, the shift member (009) is engaged with the sleeve (002); When the sleeve (002) contracts along the arm housing (001), the sleeve (002) drives the shift member (009) to switch from a locked state to an unlocked state.

10. A safety seat, characterized in that: The safety seat is equipped with the ISOFIX mechanism according to any one of claims 1 to 9.

11. A safety seat, characterized in that: include: A seat base (012), a first connector (013) and a second connector (014); The first connector (013) and the second connector (014) are arranged at intervals along the seat base (012) from left to right, and the first connector (013) and the second connector (014) are respectively connected to the seat base (012); One of the first connector (013) and the second connector (014) comprises the ISOFIX mechanism according to any one of claims 1 to 9, and the other is configured as a retractable ISOFIX mechanism.

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