CN218805367U - Prevent ISOFIX mechanism and children's safety seat that contracts - Google Patents

Abstract

The application discloses prevent returning ISOFIX mechanism and children's safety seat of contracting, belong to children's safety seat technical field, prevent returning ISOFIX mechanism and include the sleeve pipe and slide the casing that sets up in the sleeve pipe, be equipped with gear piece in the casing, the bolt, elastic component and mount pad, gear piece is suitable for from the latched position to move with the unblock sleeve pipe to the unblock position, the mount pad is connected with the casing and relative gear piece sets up, the bolt slides and sets up on the mount pad, elastic component applys the elastic force who deviates from gear piece to the plug pin, the collision is in the twinkling of an eye, elastic force is overcome to the bolt and moves towards gear piece, make gear piece maintain at latched position until conflicting gear piece. Compare current ISOFIX mechanism and have and can prevent that the casing in the sleeve from retracting when car collision accident takes place to avoid children to receive the acceleration that children's safety seat brought and pierce through the injury.

Description

Prevent ISOFIX mechanism and children's safety seat that contracts

Technical Field

The application relates to the technical field of child safety seats, in particular to an anti-retraction ISOFIX mechanism and a child safety seat.

Background

ISOFIX refers to a system where a child safety seat is connected to a vehicle seat. The anti-overturning device comprises two rigid connecting points on a vehicle seat, two adaptive rigid connecting devices on the child safety seat, an anti-overturning method (such as top constraint anti-overturning and supporting leg anti-overturning), and ISOFIX (International standards organization FIX) is widely applied to the technical field of child safety seats.

However, the existing ISOFIX mechanism has the following disadvantages: when a collision accident such as rear-end collision occurs to an automobile, the child safety seat moves towards the backrest of the automobile under the inertia of collision, the shell of the ISOFIX mechanism retracts relative to the sleeve instantaneously, and the spine of the child is subjected to large acceleration towards the head under the action of inertia force and contact force, so that the acceleration penetrating injury is brought to the child.

SUMMERY OF THE UTILITY MODEL

An aim at of this application provides prevents returning back ISOFIX mechanism, realizes that the relative sleeve pipe of casing takes place the instantaneous back that returns when preventing the collision accident, makes children's safety seat prevent returning back instantaneous upwards jumping up ISOFIX mechanism to reduce the impact force that children received, protect children.

It is another object of the present application to provide a child safety seat that uses the above-described anti-retraction ISOFIX mechanism.

In order to achieve the above purposes, the technical scheme adopted by the application is as follows: prevent returning ISOFIX mechanism of contract includes the sleeve pipe and slides the casing that sets up in the sleeve pipe, is equipped with gear piece, bolt, elastic component and mount pad in the casing, gear piece is suitable for and moves to the unblock position in order to unblock from the latched position the sleeve pipe, the mount pad with the casing is connected and is relative gear piece sets up, the bolt slides and sets up on the mount pad, the elastic component is right the bolt is applyed and is deviated from the elastic force of gear piece, the collision is in the twinkling of an eye, the elastic force orientation is overcome to the bolt gear piece moves, until conflicting gear piece makes gear piece maintains at latched position.

Preferably, when the bolt is in the initial position, the elastic element is in an unnatural state, and the mounting seat is provided with a limiting part which is suitable for abutting against the bolt so as to cooperate with the elastic element to keep the bolt in the initial position under normal conditions.

Further preferably, along being close to the direction of gear piece, the bolt is including the first end, the intermediate junction section that set gradually, and second end, the intermediate junction section is followed the length direction of casing sets up, the elastic component is parallel the intermediate junction section sets up, first end or the second end is perpendicular the intermediate junction section sets up so that connect the elastic component, the second end is suitable for to follow the length direction of casing inserts gear piece top.

As a preferred, the first end reaches the second end is all perpendicular the intermediate junction section sets up, makes the bolt is character cut in bas-relief shape, spacing portion sets up the first end with between the second end, the elastic component is the pressure spring, the conflict of pressure spring one end first end, the other end are contradicted spacing portion is kept away from one side of gear piece, spacing portion is nearly one side of gear piece is suitable for the conflict the second end.

Preferably, the mounting seat comprises a bottom surface arranged at the bottom of the bolt, a first side surface and a second side surface, the first side surface and the second side surface are arranged on two sides of the bolt, the bottom surface, the first side surface and the second side surface jointly form a sliding rail for the bolt to slide, and an opening is formed in the upper side of the mounting seat.

Preferably, the first end portion and the second end portion protrude from the opening and contact an upper wall of the housing, and portions of the first end portion and the second end portion contacting the upper wall of the housing are curved.

Preferably, the intermediate connection section is provided with a contact protrusion for reducing a contact area, and the contact protrusion is in contact with a bottom surface of the mounting seat.

Preferably, the first side surface is provided with a first convex portion protruding toward the second side surface, the second side surface is provided with a corresponding second convex portion, and the first convex portion and the second convex portion form the limiting portion.

Preferably, the end of the housing is provided with a bushing, and the mounting seat is mounted on the housing through the bushing.

The present application provides another technical solution: a child safety seat employing the above anti-retraction ISOFIX mechanism.

Compared with the prior art, the beneficial effect of this application lies in: when the automobile has a rear-end collision accident, the position of the casing relative to the sleeve is locked by matching the gear piece and the locking piece, so that the casing relative to the sleeve is prevented from being instantaneously retracted, the trend of the child safety seat moving towards the backrest direction of the automobile seat under the collision inertia is converted into instantaneous upward jumping, the acceleration of the spine of the child to the head direction is effectively reduced, and the child is protected.

Drawings

FIG. 1 is a schematic structural diagram of a conventional ISOFIX mechanism;

FIG. 2 is a schematic diagram of a prior art ISOFIX mechanism when it is retracted;

FIG. 3 is a schematic diagram of an assembly structure of an anti-retraction ISOFIX mechanism provided in the present application;

FIG. 4 is an exploded view of the anti-recoil ISOFIX mechanism;

FIG. 5 is a schematic structural diagram of an anti-retraction ISOFIX mechanism when the latch is in an initial position;

FIG. 6 is a schematic structural diagram of the retraction prevention ISOFIX mechanism which cannot retract when an automobile collides;

FIG. 7 is a schematic view of the retraction prevention ISOFIX mechanism allowing retraction of the housing in a general situation;

FIG. 8 is a schematic view of a partial structure of an anti-retraction ISOFIX mechanism;

FIG. 9 is a schematic structural view of another anti-retraction ISOFIX mechanism provided herein;

FIG. 10 is a schematic structural view of yet another anti-retraction ISOFIX mechanism provided herein;

in the figure: 10. a sleeve; 1a, gear holes; 20. a housing; 30. a gear member; 312. a boss portion; 311. a locking protrusion; 32. a reset member; 40. a mounting seat; 41. a limiting part; 401. a bottom surface; 402. a first side surface; 4021. a first convex portion; 403. a second side surface; 4031. a second convex portion; 50. an elastic member; 60. a bolt; 61. a first end portion; 62. an intermediate connection section; 621. a contact projection; 63. a second end portion; 70. a bushing.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.

It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 and 2 show a conventional ISOFIX mechanism, when a collision accident such as a rear-end collision occurs in a car, the car seat accelerates forward along with the whole car, and according to the direction shown in fig. 1, at this time, an anchor rod 01 on the car applies a force to a latch 02 moving leftward, at this time, because the latch 02 is rotationally connected with an inner sleeve 03 through a first rotating shaft 021 and the latch 02 is locked by a connecting lock block 04, the latch 02 has no space rotating inward relative to the inner sleeve 03, the latch 02 transmits the force transmitted from the anchor rod 01 to the inner sleeve 03 through the first rotating shaft 021, so that the inner sleeve 03 moves leftward, the inner sleeve 03 drives the gear 05 to move leftward through a second rotating shaft 051, at this time, the whole child safety seat moves toward the back of the car seat due to an inertia effect, so that the outer sleeve 06 moves rightward relative to the inner sleeve 03, the top of the gear 05 obtains a tendency to move rightward relative to the second rotating shaft under the driving of a gear hole 06a, so that the gear 05 rotates, the lock block 04 does not interfere with the gear 04 smoothly in the process, the outer sleeve 05 retracts toward the top of the child safety seat, and the child seat is moved downward by the acceleration force, and the acceleration force of the child seat, the child seat is larger than the acceleration force applied to the child seat.

In order to solve the problem, the present application provides an anti-retraction ISOFIX mechanism, as shown in fig. 3 to 8, the anti-retraction ISOFIX mechanism includes a sleeve 10 and a housing 20 slidably disposed in the sleeve 10, a shift member 30, a latch 60, an elastic member 50 and a mounting seat 40 are disposed in the housing 20, the shift member 30 is adapted to move from a locking position to an unlocking position to unlock the sleeve 10, the mounting seat 40 is connected to the housing 20 and disposed opposite to the shift member 30, the latch 60 is slidably disposed on the mounting seat 40, the elastic member 50 applies an elastic force to the latch 60, the elastic force is away from the shift member 30, and at a collision moment, the latch 60 moves towards the shift member 30 against the elastic force until the latch 30 abuts against the shift member 30 to maintain the shift member 30 at the locking position.

Specifically, the shift position member 30 is rotatably disposed in the housing 20, and as shown in fig. 5, the shift position member 30 is adapted to be inserted into the shift position hole 1a of the sleeve 10 through the upper tubular wall of the housing 20, and the shift position member 30 is in the locking position, and the sleeve 10 is locked with respect to the housing 20.

Generally, when the housing 20 is moved forward with respect to the latch 60 at a low acceleration, the latch 60 cannot interfere with the shift position 30 against the elastic force, and the shift position 30 can be rotated to the unlocking position to unlock the sleeve 10, as shown in fig. 7, and the housing 20 can be retracted into the sleeve 10.

When the ISOFIX mechanism is installed on an automobile seat, the ISOFIX mechanism is pulled to the longest by the manual unlocking gear piece 30, the latch is aligned with an automobile anchor rod and pushed inwards, the latch is meshed with the automobile anchor rod, then the child safety seat is pushed towards the direction of the backrest of the automobile seat, the ISOFIX mechanism enters a state shown in figure 7 at the moment, and the ISOFIX mechanism retracts like the existing ISOFIX mechanism so as to be installed on the automobile seat quickly.

After the ISOFIX mechanism is installed on the car seat, if a collision accident such as rear-end collision occurs during the running of the car, the car acceleration is large at the moment of the collision, that is, the acceleration of forward movement of the housing 20 relative to the latch 60 is large, as shown in fig. 6, the force of the right movement of the latch 60 is larger than the force of the left movement applied by the elastic member 50, the latch 60 is blocked on the rotation path of the shift 30 before the shift 30 is disengaged from the shift hole 1a, the shift 30 is locked at the locked position, the housing 20 cannot retract inwards relative to the sleeve 10 instantaneously, and the tendency that the child safety seat moves towards the back of the car seat under the inertia of the collision is converted into the movement that the child safety seat jumps upwards instantaneously, so that the acceleration of the spine of the child towards the head direction is effectively reduced, and the child is protected.

Correspondingly, one end of the gear 30 is provided with a protrusion 312 adapted to abut against the plug 60, the protrusion 312 is provided with an abutting arc surface, the abutting arc surface abuts against the bottom surface 401 of the plug 60, an upward acting force is applied to the plug 60, the plug 60 abuts against the upper wall of the casing 20 and applies a downward force to the abutting arc surface to stop the rotation of the gear 30, and the locking protrusion 311 of the gear 30 inserted into the gear hole 1a applies a leftward force to the sleeve 10 to force the sleeve 10 to move leftward together with the casing 20. The interaction force between the abutting arc surface and the bolt 60 acts in the vertical direction, and the horizontal component force cannot be generated to promote the bolt 60 to slide.

The ISOFIX mechanism further comprises a resetting piece 32 suitable for resetting the gear position piece 30, the resetting piece 32 is of an elastic structure such as a tension spring, after the collision accident is finished, the gear position piece 30 is reset by the resetting piece 32, the abutting arc surface leaves the bottom surface 401 of the bolt 60, and the bolt 60 moves leftwards under the action of the elastic piece 50 to be reset.

Further, as shown in fig. 5 and 6, the latch 60 has an initial position, the elastic element 50 is in an unnatural state when the latch 60 is in the initial position, and the mounting seat 40 has a position-limiting portion 41, and the position-limiting portion 41 is adapted to abut against the latch 60 to cooperate with the elastic element 50 to keep the latch 60 in the initial position. It can be understood that, the unnatural state herein refers to the elastic member 50 being in a compressed or stretched state, and since the latch 60 is in the initial position and is subjected to a large elastic force, the latch 60 can start to move toward the shift position member 30 against the force of the elastic member 50 only when the housing 20 has a sufficient acceleration relative to the latch 60, and by designing the deformation amount of the elastic member 50 in the initial position, the acceleration threshold of the latch 60 in the movement can be adjusted, and by selecting the elastic coefficient of the elastic member 50, the latch 60 can quickly move after the current acceleration exceeds the set acceleration threshold, and reach above the shift position member 30 to interfere before the shift position member 30 escapes from the shift position hole 1 a.

Further, as shown in fig. 6, the latch 60 includes a first end portion 61, an intermediate connecting portion 62, and a second end portion 63, which are sequentially arranged in a direction close to the shift member 30, the intermediate connecting portion 62 is arranged along the length direction of the housing 20, the elastic member 50 is arranged parallel to the intermediate connecting portion 62, the first end portion 61 or the second end portion 63 is arranged perpendicular to the intermediate connecting portion 62 so as to be connected to the elastic member 50, and the second end portion 63 is adapted to be inserted above the shift member 30 along the length direction of the housing 20. Elastic element 50 and bolt 60 all set up along casing 20 length direction, and bolt 60 slides along the length of casing 20 and inserts gear 30 top, and elastic force, bolt 60 sliding direction, the acceleration direction of casing 20 relative bolt 60 when colliding all are on the same straight line, avoid bolt 60 skew slide rail on the mount pad 40.

In this embodiment, the first end portion 61 and the second end portion 63 are both perpendicular to the middle connection section 62, so that the plug pin 60 is in a shape of a Chinese character 'ao', the limiting portion 41 is disposed between the first end portion 61 and the second end portion 63, the elastic member 50 is a compression spring, the use cost of the compression spring is low, and the specification and the model can be selected more, one end of the compression spring abuts against the first end portion 61, the other end of the compression spring abuts against one side of the limiting portion 41 far away from the gear 30, one side of the limiting portion 41 near the gear 30 is suitable for abutting against the second end portion 63, the compression spring is compressed by the gear 30 and the limiting portion 41 when the plug pin 60 is in the initial position and continuously applies a leftward force to the gear 30, at the moment of collision, the casing 20 has a relatively large acceleration with respect to the plug pin 60, so that the plug pin 60 can further compress the compression spring to move rightward and be inserted above the gear 30. The pressure spring and the limiting part 41 are both arranged in a middle concave area of the concave bolt 60, the structure is compact, the limiting part 41 is used for abutting against the bolt 60 and is reused for installing the pressure spring, and the structure is simplified.

In other embodiments, as shown in fig. 9, the elastic element 50 may also be configured as a tension spring 501, in the figure, the latch 60 is in the initial position, the tension spring 501 applies a leftward pulling force to the latch 60, the limiting portion 41 is configured as a limiting boss 411, the limiting boss 411 blocks the leftward movement of the latch 60 to cooperate with the tension spring 501 to fix the latch 60 in the initial position, and at the moment of collision, the latch 60 moves rightward against the pulling force of the tension spring 501.

In other embodiments, the latch 60 may be designed in other shapes than a concave shape, for example, the latch 60 shown in fig. 10 may be L-shaped, which also realizes that the elastic force, the sliding direction of the latch 60, and the acceleration direction of the housing 20 relative to the latch 60 during collision are all in the same line, so as to prevent the latch 60 from deviating from the slide rail on the mounting seat 40 during sliding. Further, the elastic member 50 is still a compression spring, and the stopper 41 is a baffle 412 disposed at the right side of the end of the latch 60.

More specifically, in this embodiment, as shown in fig. 8, the mounting base 40 includes a bottom surface 401 disposed at the bottom of the bolt 60, and a first side surface 402 and a second side surface 403 disposed at two sides of the bolt 60, where the bottom surface 401, the first side surface 402, and the second side surface 403 together form a sliding rail for the bolt 60 to slide, and an opening is disposed on an upper side of the mounting base 40, so as to facilitate mounting the bolt 60, the elastic element 50, and the like into the sliding rail.

Further, as shown in fig. 6, the first end portion 61 and the second end portion 63 extend out of the openings and contact with the upper wall of the housing 20, and the portions of the first end portion 61 and the second end portion 63 contacting with the upper wall of the housing 20 are curved, so as to reduce the friction force between the sliding pin 60 and the upper wall of the housing 20.

The intermediate connection section 62 is provided with a contact protrusion 621 for reducing a contact area, and the contact protrusion 621 contacts the bottom surface 401 of the mounting seat 40 to reduce friction between the latch pin 60 and the bottom surface 401 of the mounting seat 40 and reduce an obstruction force except the elastic member 50 when the latch pin 60 slides.

As shown in fig. 8, a first convex portion 4021 protruding toward the second side surface 403 is disposed on the first side surface 402, a corresponding second convex portion 4031 is disposed on the second side surface 403, and the first convex portion 4021 and the second convex portion 4031 form the stopper portion 41, so that the stopper portion 41 has a simple structure and is easy to machine and mold.

The end of the housing 20 is provided with a bushing 70, the mounting seat 40 is mounted on the housing 20 through the bushing 70, and the side surface of the bushing 70 is filled between the outer wall of the housing 20 and the inner wall of the casing 10 to reduce the sliding friction therebetween.

The present application also provides a child safety seat that uses the above-described anti-retraction ISOFIX mechanism. The automobile seat has the advantages that the instant retraction of the shell 20 is prevented at the moment of collision, the child seat is prevented from moving towards the backrest of the automobile seat, the injury of the child caused by the penetration of acceleration is reduced, and the child is protected.

The foregoing has described the principles, principal features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims (10)

1. Prevent contracting ISOFIX mechanism, its characterized in that: including sleeve pipe and the casing of slip setting in the sleeve pipe, be equipped with gear piece, bolt, elastic component and mount pad in the casing, gear piece is suitable for and moves to unblock position in order to unblock from the latched position the sleeve pipe, the mount pad with the casing is connected and is relative gear piece sets up, the bolt slides and sets up on the mount pad, the elastic component is right the bolt is applyed and is deviated from gear piece's elastic force, the collision is in the twinkling of an eye, the elastic force orientation is overcome to the bolt gear piece moves until conflicting gear piece makes gear piece maintains at latched position.

2. The retraction-preventing ISOFIX mechanism of claim 1, wherein: the bolt is equipped with initial position, when the bolt was in initial position, the elastic component was in the unnatural state, the mount pad is equipped with a spacing portion, spacing portion is suitable for to contradict the bolt, in order to cooperate the elastic component makes under general the bolt keeps initial position.

3. The retraction-preventing ISOFIX mechanism of claim 2, wherein: the edge is close to the direction of gear piece, the bolt is including the first end, the intermediate junction section that set gradually, and second end, the intermediate junction section is followed the length direction of casing sets up, the elastic component is parallel the intermediate junction section sets up, first end or the second end is perpendicular the intermediate junction section sets up so that connect the elastic component, the second end is suitable for to be followed the length direction of casing inserts gear piece top.

4. The retraction-preventing ISOFIX mechanism of claim 3, wherein: the first end reaches the second end is all perpendicular the intermediate junction section sets up, makes the bolt is character cut in bas-relief, spacing portion sets up first end with between the second end, the elastic component is the pressure spring, the conflict of pressure spring one end first end, the other end are contradicted spacing portion is kept away from one side of gear piece, spacing portion is close one side of gear piece is suitable for the conflict the second end.

5. The retraction-preventing ISOFIX mechanism according to claim 3 or 4, wherein: the mounting seat is in including setting up the bottom surface of bolt bottom, and set up the first side and the second side of bolt both sides, the bottom surface the first side the second side constitutes the confession jointly the gliding slide rail of bolt, the mounting seat upside is equipped with the opening.

6. The retraction-preventing ISOFIX mechanism of claim 5, wherein: the first end portion and the second end portion extend out of the opening to be in contact with an upper pipe wall of the shell, and the portions of the first end portion and the second end portion in contact with the upper pipe wall of the shell are curved.

7. The retraction-preventing ISOFIX mechanism of claim 5, wherein: the middle connecting section is provided with a contact protrusion for reducing the contact area, and the contact protrusion is in contact with the bottom surface of the mounting seat.

8. The retraction-preventing ISOFIX mechanism of claim 5, wherein: the first side face is provided with a first convex part protruding towards the second side face, the second side face is provided with a corresponding second convex part, and the first convex part and the second convex part form the limiting part.

9. The anti-retraction ISOFIX mechanism of claim 1 wherein: the end of the shell is provided with a bushing, and the mounting seat is mounted on the shell through the bushing.

10. Children's safety seat, its characterized in that: comprising an anti-retraction ISOFIX mechanism according to any of claims 1-9.

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