CN114312508B

CN114312508B - ISOFIX urgent locking mechanism and children's safety seat

Info

Publication number: CN114312508B
Application number: CN202210062948.4A
Authority: CN
Inventors: 管晨彬; 曹文勇; 程飞; 沈元杰
Original assignee: Ningbo Baby First Baby Products Co Ltd
Current assignee: Ningbo Baby First Baby Products Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2023-03-28
Anticipated expiration: 2042-01-20
Also published as: CN114312508A

Abstract

The invention provides an ISOFIX emergency locking mechanism and a child safety seat, wherein the ISOFIX emergency locking mechanism comprises a lock release rod, a sliding rail frame and a locking assembly, the sliding rail frame is provided with a ratchet, the ratchet is provided with a guide surface, the locking assembly comprises a limiting assembly, an acceleration sensitive rotating shaft and a kit, and the kit is provided with a pressing block; when the acceleration sensitive rotating shaft is changed from a state to be triggered to a triggered state at the moment of rear-end collision, the lock release rod moves downwards to drive the pressing block to push the acceleration sensitive rotating shaft to move until the limiting component prevents the acceleration sensitive rotating shaft from continuing to move so as to prevent the lock release rod from continuing to move downwards, and the slide rail frame is stopped due to the blockage of the lock release rod. According to the invention, the acceleration sensitive rotating shaft rotates at the moment of rear-end collision of the vehicle to realize state switching, so that the acceleration sensitive rotating shaft can be positioned below the pressing block of the external member, the limiting component can prevent the acceleration sensitive rotating shaft from continuously moving after the lock release rod moves downwards for a certain distance, the ISOFIX automatic locking is realized, the safety is high, manual operation is not required, the operation is simple, and the installation is convenient.

Description

ISOFIX urgent locking mechanism and children's safety seat

Technical Field

The invention relates to the technical field of child safety seats, in particular to an ISOFIX emergency locking mechanism and a child safety seat.

Background

Currently available ISOFIX can be divided into two categories, one category of ISOFIX allows retraction, and the other category controls retraction through two locks. When the ISOFIX allows the retracted child safety seat to be tested in a rear-end collision manner, the retraction of the ISOFIX can cause the injury value of a child dummy to be increased, and the safety is influenced; the retractable child safety seat is controlled by the two locks, the two locks need to be pressed and the seat needs to be pushed simultaneously during installation, operation is complex, installation is inconvenient, and consumer experience is affected.

Disclosure of Invention

In order to solve at least one aspect of the above problems, the present invention firstly provides an ISOFIX emergency locking mechanism, which includes a release lever, a slide rail frame and a locking assembly, wherein the slide rail frame is provided with a plurality of ratchets matched with the release lever, the ratchets are provided with guide surfaces, the locking assembly includes a limit assembly, an acceleration sensitive rotating shaft hinged to the limit assembly, and a sleeve sleeved outside the release lever, and the sleeve is provided with a pressing block; the acceleration sensitive rotating shaft is provided with a triggering state and a state to be triggered, when the acceleration sensitive rotating shaft is changed from the state to be triggered to the triggering state at the moment of rear-end collision, the lock release rod moves downwards along the guide surface and drives the pressing block to push the acceleration sensitive rotating shaft to move until the limiting assembly prevents the acceleration sensitive rotating shaft from continuously moving so as to prevent the lock release rod from continuously moving downwards, and at the moment, the sliding rail frame is stopped by the lock release rod so as to complete locking.

Optionally, the sensitive pivot of acceleration include the pivot and with first arm and the second arm that the lateral wall of pivot is connected, the pivot with spacing subassembly is articulated to be connected, first arm is located the rear of second arm, first arm be suitable for when the release lever moves down with the briquetting butt.

Optionally, the length of the first arm is longer than the length of the second arm.

Optionally, the limiting assembly comprises a first fixing frame, a sliding block and an elastic sheet, the first fixing frame is provided with a first sliding groove for the sliding block to move up and down and a second sliding groove for the sleeve to move up and down, and a return spring is arranged between the bottom of the first sliding groove and the sliding block; the slider is provided with a hinge groove for hinging the rotating shaft and a clamping groove for inserting the elastic sheet, when the acceleration sensitive rotating shaft is in the state to be triggered, the elastic sheet is pressed on the second arm, and when the acceleration sensitive rotating shaft is changed from the state to be triggered to the triggering state at the moment of rear-end collision, the acceleration sensitive rotating shaft turns towards the first arm.

Optionally, the limiting assembly further comprises an insertion piece, the first fixing frame is provided with a third sliding groove for the insertion piece to move back and forth, the sliding block is provided with a convex rod, the insertion piece is provided with a chute in sliding connection with the convex rod, and the rear end of the insertion piece is further provided with a limiting block; and at the moment of rear-end collision, the acceleration sensitive rotating shaft is changed from the state to be triggered to the triggered state, the lock release rod moves downwards along the guide surface and drives the pressing block to push the acceleration sensitive rotating shaft and the sliding block to move downwards, the convex rod pushes the inserting piece to move backwards in the downward moving process until the limiting block is abutted against the bottom of the lock release rod, so that the lock release rod is prevented from continuously moving downwards, and at the moment, the slide rail frame is blocked by the lock release rod to stop to complete locking.

Optionally, the locking subassembly still include with the gland that first mount is connected, the gland with be formed with between the first mount and supply the chamber that holds of inserted sheet installation.

Optionally, spacing subassembly includes ISOFIX skeleton and reduction torsion spring, the ISOFIX skeleton is equipped with the confession the articulated mounting hole of pivot, reduction torsion spring cup joints outside the pivot, just reduction torsion spring's both ends respectively with the second arm with ISOFIX skeleton connection works as the sensitive pivot of acceleration is in when waiting the trigger state, reduction torsion spring is in natural state, knocks into the tail in the twinkling of an eye the sensitive pivot of acceleration is followed treat the trigger state transform extremely during the trigger state, the sensitive pivot orientation of acceleration first arm upset, this moment reduction torsion spring is in torsional state.

Optionally, the ISOFIX skeleton is equipped with butt platform and spacing platform, works as the sensitive pivot of acceleration is in when waiting to trigger the state, the second arm with butt platform butt, the rear-end collision is in the twinkling of an eye the sensitive pivot of acceleration follow wait to trigger the state transform to when triggering the state, release lever follows the spigot surface moves down and drives the briquetting promotes the rotatory downward movement of first arm is up to first arm with spacing platform butt, in order to realize preventing release lever continues to move down, at this moment the slide rail frame receive release lever blocks and stops in order to accomplish the locking.

Optionally, the limiting assembly further comprises a second fixing frame and a guide baffle plate, wherein the second fixing frame and the guide baffle plate are connected with the ISOFIX framework, and a fourth sliding groove for the kit to move up and down is formed between the second fixing frame and the guide baffle plate.

Compared with the prior art, the ISOFIX emergency locking mechanism is characterized in that a ratchet of a slide rail frame is provided with a guide surface matched with a lock release rod, and an acceleration sensitive rotating shaft which is easily influenced by acceleration is arranged, the acceleration sensitive rotating shaft rotates at the moment of rear-end collision of a vehicle to realize state switching, so that the acceleration sensitive rotating shaft can be positioned below a pressing block of a kit, meanwhile, the slide rail frame can move backwards relative to the lock release rod under the action of the acceleration, the lock release rod moves downwards along the guide surface of the ratchet, the pressing block pushes the acceleration sensitive rotating shaft to move in the downward movement process, after the slide rail frame moves for a small distance, a limiting component can prevent the acceleration sensitive rotating shaft from continuing to move, the lock release rod is prevented from continuing to move downwards in the ratchet, and the lock release rod which is not completely moved out of the slide rail frame can prevent the slide rail frame from continuing to move at the moment, and finally, the ratchet is automatically locked; this kind of locking mechanism can realize the automatic locking of ISOFIX under the acceleration effect, prevents to take place to retract the situation at collision in-process ISOFIX such as knocking into the back, and the security is high, and need not the manual work and operate, easy operation, simple to operate.

Additionally, the present invention provides a child safety seat comprising an ISOFIX emergency latch mechanism as described above.

Compared with the prior art, the advantages of the child safety seat and the ISOFIX emergency locking mechanism are the same as those of the prior art, and are not described herein again.

Drawings

FIG. 1 is a block diagram of an ISOFIX emergency latch mechanism of an embodiment of the present invention;

FIG. 2 is a partial exploded view of an ISOFIX emergency latch mechanism of an embodiment of the present invention;

fig. 3 is a partial structural view of an ISOFIX emergency locking mechanism in a state to be triggered according to an embodiment of the present invention;

FIG. 4 is a partial block diagram of an ISOFIX emergency locking mechanism in a triggered state according to an embodiment of the present invention;

FIG. 5 is a partial cross-sectional view of an ISOFIX emergency latch mechanism of an embodiment of the present invention in a armed state;

FIG. 6 is a partial cross-sectional view of the ISOFIX emergency locking mechanism of an embodiment of the present invention in a triggered state;

FIG. 7 is a second partial cross-sectional view of the ISOFIX emergency locking mechanism of an embodiment of the present invention in a armed state;

FIG. 8 is a second partial cross-sectional view of the ISOFIX emergency latch mechanism of an embodiment of the present invention in the activated state;

FIG. 9 is a block diagram of an ISOFIX emergency lockout mechanism of another embodiment of the present invention;

FIG. 10 is a partial exploded view of an ISOFIX emergency lockout mechanism of another embodiment of the present invention;

FIG. 11 is a partial cross-sectional view of an ISOFIX emergency latch mechanism of another embodiment of the present invention in a armed state;

FIG. 12 is a partial cross-sectional view of an ISOFIX emergency latch mechanism of another embodiment of the present invention in the activated state;

fig. 13 is a structural diagram of the ISOFIX emergency locking mechanism between the release lever and the slide rail bracket at the instant of rear-end collision according to the embodiment of the present invention.

Description of the reference numerals:

1. a lock releasing lever; 2. a slide rail frame; 21. a ratchet; 22. a guide surface; 3. a locking assembly; 31. a limiting component; 311. a first fixing frame; 3111. a first chute; 3112. a second chute; 3113. a third chute; 312. a slider; 3121. a hinge slot; 3122. a card slot; 3123. a nose bar; 313. a spring plate; 314. a return spring; 315. inserting sheets; 3151. a chute; 3152. a limiting block; 316. an ISOFIX backbone; 3161. mounting holes; 3162. a butting table; 3163. a limiting table; 317. a return torsion spring; 318. a second fixing frame; 3181. a fourth chute; 319. a guide baffle plate; 32. an acceleration sensitive shaft; 321. a rotating shaft; 322. a first arm; 323. a second arm; 33. a kit; 331. briquetting; 34. and (7) pressing the cover.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the normal use of a product.

The terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the drawings of the embodiment of the invention, a coordinate system XYZ is provided, wherein 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 forward direction of the Y axis coincides with the driving direction of the automobile, 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 an ISOFIX emergency locking mechanism, which is shown by combining with figures 1 to 13 and comprises a lock release rod 1, a slide rail frame 2 and a locking assembly 3, wherein the slide rail frame 2 is provided with a plurality of ratchets 21 matched with the lock release rod 1, the ratchets 21 are provided with guide surfaces 22, the locking assembly 3 comprises a limit assembly 31, an acceleration sensitive rotating shaft 32 hinged to the limit assembly 31 and an external member 33 sleeved outside the lock release rod 1, and the external member 33 is provided with a pressing block 331; the acceleration sensitive rotating shaft 32 has a trigger state and a state to be triggered, and at the moment of rear-end collision, the acceleration sensitive rotating shaft 32 is changed from the state to be triggered to the trigger state, the lock release rod 1 moves downwards along the guide surface 22 and drives the pressing block 331 to push the acceleration sensitive rotating shaft 32 to move until the limiting component 31 prevents the acceleration sensitive rotating shaft 32 from continuously moving so as to prevent the lock release rod 1 from continuously moving downwards, and at the moment, the slide rail frame 2 is blocked by the lock release rod 1 and stops to complete locking.

When the child safety seat is installed on an automobile, the ISOFIX of the child safety seat is in hard connection with the automobile seat, the unlocking rod 1 and the ISOFIX are in hard connection in the Y-axis direction, when the acceleration sensitive rotating shaft 32 is in a state to be triggered, the unlocking rod 1 can be controlled by external force (such as an unlocking switch) to move in the Z-axis direction in the ratchet 21, when the acceleration sensitive rotating shaft is moved out of the ratchet 21, the slide rail frame 2 which is in hard connection with the chair of the child safety seat can normally move back and forth relative to the unlocking rod 1, so that the unlocking rod 1 can switch positions among the ratchets 21, and the normal telescopic operation of the ISOFIX is realized; the locking release rod 1 moves downwards, namely the locking release rod 1 moves downwards relative to the slide rail frame 2, the guide surface 22 of each ratchet 21 is positioned on the front side wall of each ratchet 21, the forward direction of the automobile running direction is the front side, namely the forward direction of the Y axis, and the guide surface 22 is arranged in a manner of inclining upwards and downwards; the rear-end collision means that the child safety seat is installed in a rear-end collided vehicle, namely the tail part of the vehicle where the child safety seat is located is collided by other vehicles, the slide rail frame 2 is subjected to an acting force opposite to the driving direction of the vehicle at the rear-end collision moment, and the slide rail frame 2 moves backwards relative to the lock releasing rod 1 at the moment; the external member 33 is tightly wrapped outside the unlocking rod 1, the external member 33 and the unlocking rod 1 can synchronously move under the action of external force, and the pressing block 331 is arranged on the external member 33 in a protruding manner from the top of one side wall close to the acceleration sensitive rotating shaft 32, so that the pressing block 331 can smoothly act on the acceleration sensitive rotating shaft 32 in the rear-end collision process; at the moment of rear-end collision, the acceleration-sensitive rotating shaft 32 can rotate relative to the limiting component 31 under the action of acceleration, so that the pressing block 331 can act on the acceleration-sensitive rotating shaft 32.

In the emergency ISOFIX locking mechanism in the embodiment, the ratchet 21 of the slide rail frame 2 is provided with the guide surface 22 matched with the unlocking rod 1, and the acceleration sensitive rotating shaft 32 which is easily influenced by acceleration is arranged, the acceleration sensitive rotating shaft 32 rotates at the moment of vehicle rear-end collision to realize state switching, so that the acceleration sensitive rotating shaft 32 can be positioned below the pressing block 331 of the suite 33, meanwhile, the slide rail frame 2 can move backwards relative to the unlocking rod 1 under the action of acceleration, so that the unlocking rod 1 moves downwards along the guide surface 22 of the ratchet 21, the pressing block 331 pushes the acceleration sensitive rotating shaft 32 to move in the process of downward movement, after moving for a short distance, the limiting component 31 can prevent the acceleration sensitive rotating shaft 32 from continuing to move, further downward movement of the unlocking rod 1 in the ratchet 21 is prevented, and at this time, the unlocking rod 1 which is not completely moved out of the ratchet 21 can prevent the slide rail frame 2 from continuing to move, and finally, automatic locking operation is realized; this kind of locking mechanism can realize the automatic locking of ISOFIX under the acceleration effect, prevents to take place to retract the situation at collision in-process ISOFIX such as knocking into the back, and the security is high, and need not the manual work and operate, easy operation, simple to operate.

Optionally, as shown in fig. 3, fig. 4, fig. 6, fig. 10, and fig. 11, the acceleration-sensitive rotating shaft 32 includes a rotating shaft 321, and a first arm 322 and a second arm 323 connected to a side wall of the rotating shaft 321, the rotating shaft 321 is hinged to the limiting component 31, the first arm 322 is located behind the second arm 323, and the first arm 322 is adapted to abut against the pressing block 331 when the lock release lever 1 moves downward.

Wherein, the rear direction refers to the rear side of the driving direction, the acceleration sensitive rotating shaft 32 rotates backwards at the moment of rear-end collision, so that the first arm 322 rotates to the position below the pressing block 331, so that the pressing block 331 can smoothly push the acceleration sensitive rotating shaft 32 to move when the lock release lever 1 moves downwards relative to the slide rail frame 2, and specifically, the acceleration sensitive rotating shaft 32 can be pushed to move downwards or the acceleration sensitive rotating shaft 32 is pushed to continue to rotate backwards; when the acceleration sensitive rotating shaft 32 is in a state to be triggered, the limiting component 31 fixes the position of the acceleration sensitive rotating shaft 32 by limiting the position of the second arm 323; the first arm 322 and the second arm 323 are angled, preferably at an obtuse angle, to allow the overall structure to be as compact as possible.

Optionally, as shown in fig. 3, 4, 6, 10, and 11, the length of the first arm 322 is longer than the length of the second arm 323.

The lengths of the first arm 322 and the second arm 323 are designed to be different because the first arm 322 with a longer length obtains a larger torque and is easier to rotate under the same acceleration; meanwhile, the included angle between the second arm 323 and the horizontal plane is designed to be as shown in fig. 5, so that the torque directions formed by the first arm 322 and the second arm 323 are the same, the acceleration sensitive rotating shaft 32 can rotate more easily, and the structural arrangement factor is also considered; the sensitivity of the acceleration sensitive rotating shaft 32 can be adjusted by adjusting the force of the limiting component 31 to limit the position of the second arm 323, the length of the first arm 322 and the second arm 323 of the acceleration sensitive rotating shaft 32, and the angle between the first arm 322 and the second arm 323, and the specific design can be set according to the use requirement.

Optionally, as shown in fig. 2 to 8, the limiting assembly 31 includes a first fixing frame 311, a sliding block 312 and an elastic sheet 313, the first fixing frame 311 is provided with a first sliding groove 3111 for the sliding block 312 to move up and down and a second sliding groove 3112 for the sleeve 33 to move up and down, and a return spring 314 is arranged between the bottom of the first sliding groove 3111 and the sliding block 312; the sliding block 312 is provided with a hinge groove 3121 for hinging the rotating shaft 321 and a clamping groove 3122 for inserting the elastic sheet 313, when the acceleration sensitive rotating shaft 32 is in the state to be triggered, the elastic sheet 313 is pressed against the second arm 323, when the acceleration sensitive rotating shaft 32 is changed from the state to be triggered to the triggered state at the moment of rear-end collision, the acceleration sensitive rotating shaft 32 is turned over towards the first arm 322, and at the moment, the second arm 323 is still pressed against the elastic sheet 313 to apply pressure to the second arm 323 all the time, so that the acceleration sensitive rotating shaft 32 can be reset after the collision is finished.

The first fixing frame 311 is fixedly connected with the slide rail frame 2, that is, the first fixing frame 311 and the slide rail frame 2 can move synchronously; the elastic sheet 313 is preferably of a V-shaped sheet structure, one sheet of the V-shaped sheet structure is connected with the clamping groove 3122 in an inserting manner, the installation and the disassembly are convenient, the subsequent maintenance and the replacement are convenient, the other sheet is used for pressing the second arm 323 when the acceleration sensitive rotating shaft 32 is in a state to be triggered, the sensitivity of the acceleration sensitive rotating shaft 32 can be adjusted by adjusting the elastic force of the elastic sheet 313, and the design flexibility is high; in the emergency locking process, the sliding block 312 is pushed by the acceleration sensitive rotating shaft 32 to move downwards for a certain distance and then is stopped under the action of the limiting component 31, and the return spring 314 is used for pushing the sliding block 312 upwards to return to the original position after the emergency locking operation is finished; the length direction of the hinge groove 3121 is the same as the X-axis direction, so that when the rotating shaft 321 is hinged to the hinge groove 3121, the first arm 322 and the second arm 323 of the acceleration sensitive rotating shaft 32 are arranged in the Y-axis direction, and the acceleration sensitive rotating shaft 32 can perform a turning motion in the Y-axis direction; the first fixing frame 311 is provided with a first sliding groove 3111 and a second sliding groove 3112, the shape and size of the first sliding groove 3111 is matched with the shape and size of the slider 312, and the shape and size of the second sliding groove 3112 is matched with the shape and size of the sleeve member 33, so that the slider 312 and the sleeve member 33 can move more stably and reliably in the Z-axis direction.

Optionally, as shown in fig. 2 to 8, the limiting assembly 31 further includes an insert sheet 315, the first fixing frame 311 is provided with a third sliding groove 3113 for the insert sheet 315 to move back and forth, the slider 312 is provided with a protruding rod 3123, the insert sheet 315 is provided with a sliding groove 3151 slidably connected to the protruding rod 3123, and the rear end of the insert sheet 315 is further provided with a limiting block 3152; in the rear-end collision moment, the acceleration sensitive rotating shaft 32 is changed from the state to be triggered to the triggered state, the unlocking rod 1 moves downwards along the guide surface 22 and drives the pressing block 331 to push the acceleration sensitive rotating shaft 32 and the sliding block 312 to move downwards, the convex rod 3123 pushes the inserting piece 315 to move backwards in the downward moving process until the limiting block 3152 is abutted against the bottom of the unlocking rod 1, so that the unlocking rod 1 is prevented from moving downwards continuously, and at the moment, the slide rail frame 2 is blocked by the unlocking rod 1 and stops to complete locking.

The third sliding groove 3113 is arranged on the first fixing frame 311, so that the front and back movement of the insertion piece 315 is more stable and reliable, the movement of the insertion piece 315 in the X-axis direction can be limited, and the reliability of the locking operation is ensured; the inclined groove 3151 is a strip-shaped groove structure and is arranged in a structure with the back being up and down, the convex rod 3123 penetrates through the side wall of the first sliding groove 3111 and then is matched with the inclined groove 3151, the convex rod 3123 can move in the Z-axis direction relative to the first fixing frame 311, the insertion sheet 315 is pushed to move backwards in the downward moving process, the limiting block 3152 on the insertion sheet 315 also moves backwards, the limiting block 3152 moves to the lower part of the release lever 1, when the release lever 1 moves downwards and contacts the upper surface of the limiting block 3152, the release lever 1 stops moving, at the moment, only part of the release lever 1 extends downwards from the ratchet 21, and the sliding rail frame 2 is stopped by the release lever 1.

When the vehicle normally runs, the second arm 323 of the acceleration sensitive rotating shaft 32 is pressed by the elastic sheet 313, and the acceleration sensitive rotating shaft 32 is in a state to be triggered; when a vehicle is in rear-end collision, the slide rail frame 2 is subjected to instantaneous acceleration opposite to the driving direction of the vehicle, the first arm 322 of the acceleration sensitive rotating shaft 32 is subjected to backward acceleration, so that the acceleration sensitive rotating shaft 32 enters a triggering state, the first arm 322 is instantaneously rotated to the position below the pressing block 331, meanwhile, the slide rail frame 2 can be subjected to backward movement relative to the unlocking rod 1 under the action of the acceleration, so that the unlocking rod 1 moves downwards along the guide surface 22 of the ratchet 21, the pressing block 331 is firstly contacted with the first arm 322 in the downward movement process so as to continuously push the acceleration sensitive rotating shaft 32 and the sliding block 312 hinged with the acceleration sensitive rotating shaft 32 to continuously move downwards, meanwhile, the inserting sheet 315 moves backwards under the push of the convex rod 3123, when the limiting block 3152 is abutted against the bottom of the unlocking rod 1 after moving for a certain distance, so as to prevent the unlocking rod 1 from continuously moving downwards to form self-locking, and at this time, the unlocking rod 1 which is not completely moved out of the ratchet 21 can block the slide rail frame 2 from continuously moving backwards, and finally complete the locking operation.

In the emergency ISOFIX locking mechanism in the embodiment, the downward movement of the unlocking rod 1 and the backward movement of the inserting sheet 315 are designed to be a linkage structure, so that self-locking operation is realized, the structural stability is high, the unlocking rod 1 is dragged by using the limiting block 3152 of the inserting sheet 315 to prevent the unlocking rod 1 from moving downwards, the mechanical strength of the whole structure is good, and the safety is higher; in addition, the final stressed parts after emergency locking are the release rod 1, the limiting block 3152 of the insertion sheet 315 and the slide rail frame 2, so that the requirement on the strength of the middle part is low, the main stressed form of the limiting block 3152 is compression, the material selection range is wide, and the cost and the design requirement can be reduced.

Optionally, as shown in fig. 2, the locking assembly 3 further includes a pressing cover 34 connected to the first fixing frame 311, and a receiving cavity for the insertion sheet 315 to be installed is formed between the pressing cover 34 and the first fixing frame 311.

The pressing cover 34 is fixedly connected with the first fixing frame 311, and the pressing cover 34 is additionally arranged, so that the interference of external parts on the movement of the inserting sheet 315 is prevented, and the stability and the reliability of the emergency locking operation are ensured.

Optionally, as shown in fig. 10 to 12, the limiting component 31 includes an ISOFIX framework 316 and a reset torsion spring 317, the ISOFIX framework 316 is provided with a mounting hole 3161 for the hinge 321 to hinge, the reset torsion spring 317 is sleeved outside the hinge 321, two ends of the reset torsion spring 317 are respectively connected to the second arm 323 and the ISOFIX framework 316, when the acceleration sensitive hinge 32 is in the state to be triggered, the reset torsion spring 317 is in a natural state, and the acceleration sensitive hinge 32 is shifted from the state to be triggered to the state to be triggered in the moment of rear-end collision, the acceleration sensitive hinge 32 is turned towards the first arm 322, and at this time, the reset torsion spring 317 is in a torsion state.

The ISOFIX framework 316 and the unlocking rod 1 are hard connected in the Y-axis direction, namely can synchronously move in the Y-axis direction, and the unlocking rod 1 can move in the Z-axis direction relative to the ISOFIX framework 316; two ends of a reset torsion spring 317 are respectively inserted on the second arm 323 and the ISOFIX framework 316, the reset torsion spring 317 has a natural state and a torsional state, when in the natural state, the reset torsion spring 317 can act on the acceleration sensitive rotating shaft 32 to press the second arm 323 downwards, and the second arm 323 turns backwards around the rotating shaft 321 under the action of acceleration at the rear-end moment, so that the reset torsion spring 317 is driven to be twisted into the torsional state; in addition, the sensitivity of the acceleration sensitive rotating shaft 32 can be adjusted by adjusting the torsional force of the reset torsion spring 317, and the design flexibility is high.

Optionally, as shown in fig. 10 to 12, the ISOFIX framework 316 is provided with an abutting table 3162 and a limiting table 3163, when the acceleration sensitive rotating shaft 32 is in the state to be triggered, the second arm 323 abuts against the abutting table 3162, and at the moment of rear-end collision, the acceleration sensitive rotating shaft 32 is converted from the state to be triggered to the state to be triggered, the lock releasing rod 1 moves down along the guide surface 22 and drives the pressing block 331 to push the first arm 322 to rotate and move down until the first arm 322 abuts against the limiting table 3163, so as to prevent the lock releasing rod 1 from moving down continuously, and at this time, the slide rail frame 2 is blocked by the lock releasing rod 1 and stops to complete locking.

The ISOFIX framework 316 is provided with an abutting table 3162 and a limiting table 3163 in an upward protruding manner, when the reset torsion spring 317 is in a natural state, namely the acceleration sensitive rotating shaft 32 is in a state to be triggered, the second arm 323 abuts against the upper surface of the abutting table 3162, and the abutting table 3162 is arranged so as to support the second arm 323 in the state to be triggered, so that the position of the acceleration sensitive rotating shaft 32 can be kept stable when the automobile normally runs; the limiting table 3163 is arranged, so that at the moment of rear-end collision, the pressing block 331 pushes the first arm 322 to turn downwards for a certain distance, the bottom surface of the first arm 322 can abut against the upper surface of the limiting table 3163, and the first arm 322 is prevented from moving downwards continuously.

When the vehicle runs normally, the second arm 323 of the acceleration sensitive rotating shaft 32 is in contact with the abutting table 3162 under the acting force of the reset torsion spring 317, and at this time, the acceleration sensitive rotating shaft 32 is in a state to be triggered; when the vehicle is in rear-end collision, the slide rail frame 2 is subjected to instantaneous acceleration opposite to the driving direction of the vehicle, the first arm 322 of the acceleration sensitive rotating shaft 32 is subjected to backward acceleration, so that the acceleration sensitive rotating shaft 32 enters a triggering state, the first arm 322 is instantaneously rotated to the position below the pressing block 331, meanwhile, the slide rail frame 2 can be subjected to backward movement relative to the unlocking rod 1 under the action of acceleration, so that the unlocking rod 1 moves downwards along the guide surface 22 of the ratchet 21, the pressing block 331 is contacted with the first arm 322 in the downward movement process and pushes the first arm 322 to continuously turn downwards, when the first arm 322 is moved for a certain distance and is abutted against the limit table 3163, the sleeve 33 is prevented from continuously moving downwards, therefore, the unlocking rod 1 is also prevented from continuously moving downwards, and the unlocking rod 1 which is not completely moved out of the ratchet 21 can continuously block the backward movement of the slide rail frame 2, and finally, the locking operation is completed.

The ISOFIX emergency locking mechanism in this embodiment, locking subassembly 3 just can realize emergency locking operation through the cooperation of reset torsion spring 317 and the sensitive pivot 32 of acceleration to and the cooperation of the sensitive pivot 32 of acceleration and butt platform 3162 and spacing platform 3163, and spare part is few, simple structure, and the equipment is convenient, and the cost of manufacture is low.

Optionally, as shown in fig. 10 to 12, the limiting assembly 31 further includes a second fixing frame 318 connected to the ISOFIX framework 316 and a guide baffle 319, and a fourth sliding groove 3181 for the kit 33 to move up and down is formed between the second fixing frame 318 and the guide baffle 319.

The second fixing frame 318 and the guide baffle 319 are both fixedly connected to the ISOFIX framework 316, and a fourth sliding groove 3181 is formed between the second fixing frame 318 and the guide baffle 319, so that the external member 33 is more stable and reliable when moving in the Z-axis direction, and the external member 33 can be limited from moving back and forth relative to the ISOFIX framework 316.

Another embodiment of the present invention provides a child safety seat comprising an ISOFIX emergency latch mechanism as described above.

In the child safety seat in the embodiment, the ratchet 21 of the slide rail frame 2 is provided with the guide surface 22 matched with the release lever 1, and the acceleration sensitive rotating shaft 32 which is easily affected by acceleration is arranged, the acceleration sensitive rotating shaft 32 rotates at the moment of rear-end collision of a vehicle to realize state switching, so that the acceleration sensitive rotating shaft 32 can be positioned below the pressing block 331 of the suite 33, meanwhile, the slide rail frame 2 can move backwards relative to the release lever 1 under the action of acceleration, so that the release lever 1 moves downwards along the guide surface 22 of the ratchet 21, the pressing block 331 pushes the acceleration sensitive rotating shaft 32 to move in the process of moving downwards, after moving for a short distance, the limiting component 31 can prevent the acceleration sensitive rotating shaft 32 from continuing to move, further downward movement of the release lever 1 in the ratchet 21 is prevented, and at the moment, the release lever 1 which is not completely moved out of the ratchet 21 can prevent the slide rail frame 2 from continuing to finally realize automatic locking operation; this kind of locking mechanism can realize the automatic locking of ISOFIX under the acceleration effect, prevents to take place to retract the situation at collision in-process ISOFIX such as knocking into the back, and the security is high, and need not the manual work and operate, easy operation, simple to operate.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims

1. The ISOFIX emergency locking mechanism is characterized by comprising a locking release rod (1), a sliding rail frame (2) and a locking assembly (3), wherein the sliding rail frame (2) is provided with a plurality of ratchets (21) matched with the locking release rod (1), the ratchets (21) are provided with guide surfaces (22), the locking assembly (3) comprises a limiting assembly (31), an acceleration sensitive rotating shaft (32) hinged to the limiting assembly (31) and a sleeve piece (33) sleeved outside the locking release rod (1), and the sleeve piece (33) is provided with a pressing block (331); the acceleration sensitive rotating shaft (32) is provided with a triggering state and a state to be triggered, when the acceleration sensitive rotating shaft (32) is converted from the state to be triggered to the triggering state at the moment of rear-end collision, the lock releasing rod (1) moves downwards along the guide surface (22) and drives the pressing block (331) to push the acceleration sensitive rotating shaft (32) to move until the limiting component (31) prevents the acceleration sensitive rotating shaft (32) from continuously moving so as to prevent the lock releasing rod (1) from continuously moving downwards, and at the moment, the sliding rail frame (2) is blocked by the lock releasing rod (1) and stops to complete locking; the sensitive pivot of acceleration (32) including pivot (321) and with first arm (322) and second arm (323) that the lateral wall of pivot (321) is connected, pivot (321) with spacing subassembly (31) are articulated to be connected, first arm (322) are located the rear of second arm (323), first arm (322) are suitable for and are in when releasing locking lever (1) moves down with briquetting (331) butt.

2. The ISOFIX emergency latch mechanism of claim 1, wherein the length of the first arm (322) is longer than the length of the second arm (323).

3. The ISOFIX emergency locking mechanism according to claim 1 or 2, characterized in that the limiting component (31) comprises a first fixing frame (311), a sliding block (312) and a spring plate (313), the first fixing frame (311) is provided with a first sliding groove (3111) for the sliding block (312) to move up and down and a second sliding groove (3112) for the sleeve member (33) to move up and down, and a return spring (314) is arranged between the bottom of the first sliding groove (3111) and the sliding block (312); the sliding block (312) is provided with a hinge groove (3121) for hinging the rotating shaft (321) and a clamping groove (3122) for inserting the elastic sheet (313), when the acceleration sensitive rotating shaft (32) is in the state to be triggered, the elastic sheet (313) is pressed on the second arm (323), and when the acceleration sensitive rotating shaft (32) is changed from the state to be triggered to the triggering state at the rear-end moment, the acceleration sensitive rotating shaft (32) overturns towards the first arm (322).

4. The ISOFIX emergency locking mechanism according to claim 3, characterized in that the limiting component (31) further comprises a tab (315), the first fixing frame (311) is provided with a third sliding groove (3113) for the tab (315) to move back and forth, the slider (312) is provided with a protruding rod (3123), the tab (315) is provided with a chute (3151) connected with the protruding rod (3123) in a sliding manner, and the rear end of the tab (315) is further provided with a limiting block (3152); the quick-witted moment of knocking into the back acceleration sensitive pivot (32) is followed treat that the trigger state changes extremely during the trigger state, release lever (1) is followed spigot surface (22) move down and drive briquetting (331) promote acceleration sensitive pivot (32) and slider (312) move down, protruding pole (3123) move down the in-process and promote inserted sheet (315) move back until stopper (3152) with the bottom butt of release lever (1), in order to realize preventing release lever (1) continues to move down, at this moment slide rail frame (2) receive release lever (1) blocks and stops and accomplish the locking.

5. The ISOFIX emergency locking mechanism of claim 4, characterized in that said locking assembly (3) further comprises a gland (34) connected to said first holder (311), a receiving cavity for said tab (315) to be mounted is formed between said gland (34) and said first holder (311).

6. The ISOFIX emergency locking mechanism according to claim 1 or 2, characterized in that the limiting component (31) comprises an ISOFIX framework (316) and a reset torsion spring (317), the ISOFIX framework (316) is provided with a mounting hole (3161) for the rotation shaft (321) to hinge, the reset torsion spring (317) is sleeved outside the rotation shaft (321), and two ends of the reset torsion spring (317) are respectively connected with the second arm (323) and the ISOFIX framework (316), when the acceleration sensitive rotation shaft (32) is in the state to be triggered, the reset torsion spring (317) is in a natural state, at the moment of rear-end collision, the acceleration sensitive rotation shaft (32) is converted from the state to be triggered to the moment, the acceleration sensitive rotation shaft (32) is turned towards the first arm (322), and at the moment, the reset torsion spring (317) is in a torsional state.

7. The ISOFIX emergency locking mechanism of claim 6, characterized in that the ISOFIX framework (316) is provided with a butting platform (3162) and a limiting platform (3163), when the acceleration sensitive rotating shaft (32) is in the state to be triggered, the second arm (323) butts against the butting platform (3162), and when the acceleration sensitive rotating shaft (32) is switched from the state to be triggered to the triggered state at the moment of rear-end collision, the unlocking rod (1) moves downwards along the guide surface (22) and drives the pressing block (331) to push the first arm (322) to rotate downwards until the first arm (322) butts against the limiting platform (3163) so as to prevent the unlocking rod (1) from moving downwards, and at this time, the slide rail frame (2) is stopped by the unlocking rod (1) to complete locking.

8. The ISOFIX emergency locking mechanism of claim 6, characterized in that said limiting component (31) further comprises a second fixing frame (318) connected with said ISOFIX framework (316) and a guiding baffle (319), and a fourth sliding groove (3181) for the upward and downward movement of said sleeve member (33) is formed between said second fixing frame (318) and said guiding baffle (319).

9. A child safety seat comprising an ISOFIX emergency latch mechanism according to any of claims 1 to 8.