CN218966749U - Anti-retraction ISOFIX mechanism and safety seat using same - Google Patents

Abstract

The application discloses prevent retracting ISOFIX mechanism and use its safety seat belongs to children's safety seat technical field, prevent retracting ISOFIX mechanism and including sleeve pipe and slip setting at the intraductal casing of cover, be equipped with locking device in the casing and be suitable for rotating in order to unblock sheathed tube gear piece, locking device includes spacing shell, first elastic component, second elastic component and bolt, first elastic component is suitable for exerting first effort to the bolt, the second elastic component is suitable for exerting the second effort with first effort is crossing to the bolt, make the bolt maintain in initial position, be suitable for the conflict and drive the first end of bolt when the gear piece rotates, apply great thrust to first end when the rotational speed of gear piece makes the bolt take place to rotate, spacing shell conflict bolt makes the bolt only rotate and hinder the rotation of gear piece. The shell in the sleeve can be prevented from retracting when an automobile collision accident occurs, and the acceleration penetration injury of children caused by the safety seat is reduced.

Description

Anti-retraction ISOFIX mechanism and safety seat using same

Technical Field

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

Background

ISOFIX refers to a system in which a safety seat is connected to a vehicle seat. The ISOFIX is widely applied to the technical field of safety seats.

However, existing ISOFIX mechanisms suffer from the following drawbacks: when an accident such as rear-end collision occurs to the automobile, the child safety seat moves towards the backrest direction of the automobile under the action of collision inertia, the shell of the ISOFIX mechanism is retracted instantaneously relative to the sleeve, and under the action of inertia force and contact force, the spine of the child is subjected to larger acceleration towards the head direction, so that the child is subjected to acceleration penetration injury.

Disclosure of Invention

An object of the application is to provide prevent retracting ISOFIX mechanism, realize preventing that the casing takes place to retract transiently relative sleeve pipe when car emergence collision accident, make children's safety seat prevent retracting the back transiently at ISOFIX mechanism and jump up to reduce the impact that children received, protect children.

It is another object of the present application to provide a safety seat employing the above anti-recoil ISOFIX mechanism.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows: the anti-retraction ISOFIX mechanism comprises a sleeve and a shell arranged in the sleeve in a sliding manner, a gear piece is arranged in the shell and is suitable for rotating to unlock the sleeve, a locking device is further arranged in the shell and comprises a limiting shell, a first elastic piece, a second elastic piece and a bolt, the first elastic piece is suitable for applying a first acting force to the bolt, the second elastic piece is suitable for applying a second acting force intersecting the first acting force to the bolt, the first acting force and the second acting force are matched to enable the bolt to be maintained at an initial position, the gear piece instantaneously rotates in an automobile collision moment and is in collision with and drives the first end of the bolt, the bolt is enabled to have a rotating trend, when the rotating speed of the gear piece is larger than or equal to a preset speed, the bolt is enabled to apply a larger pushing force to the first end, the bolt is enabled to simultaneously overcome the first acting force and the second acting force to rotate, the second end of the bolt is suitable for abutting against the bolt, the first end of the bolt is enabled to block the first end to maintain the initial position, the gear piece rotates at a lower speed than the preset rotating speed, and the first end of the bolt is enabled to overcome the first pushing force to be smaller than the gear piece when the rotating speed is applied to the gear piece to the first end to avoid the gear piece.

Preferably, the first elastic member and the plug are disposed on the same straight line along the longitudinal direction of the housing, the first acting force acts on the plug along the longitudinal direction of the housing, the second elastic member is disposed along the height direction of the housing, and the second acting force acts on the plug along the height direction of the housing.

Preferably, the first elastic member is a spring, one end of the first elastic member is mounted on the limiting shell, and the other end of the first elastic member is suitable for abutting against an end face of the second end portion of the plug pin.

Preferably, the second elastic member is a spring, one end of the second elastic member is mounted on the limiting shell, and the other end of the second elastic member is suitable for abutting against the bottom surface of the bolt.

As an preference, the spacing shell is equipped with the installation cavity, the installation cavity includes horizontal segment and vertical section, the horizontal segment is near one side of gear piece is equipped with the opening, first elastic component sets up keep away from in the horizontal segment open-ended one side, the second elastic component is installed in the vertical segment, the bolt is in when initial position, the terminal surface of second tip in vertical segment's top with first elastic component is contradicted, the first tip of bolt follows the opening stretches out to gear piece top, vertical segment keep away from one side of gear piece with the juncture of horizontal segment is equipped with and is suitable for the conflict first limit part of second tip terminal surface, vertical segment is close to one side of gear piece with be equipped with between the opening be suitable for the conflict second limit part of bolt bottom surface, and the spacing shell casing of open-ended upper and lower both sides is suitable for the conflict respectively the upper and lower both sides of first tip.

Preferably, the first limiting portion is a rounded corner, and the end face of the second end portion is a plane.

Preferably, the second limiting portion is an inclined surface disposed towards the second end portion, and the bottom surface of the plug pin is a plane.

Preferably, the first end is wedge-shaped, and the first end abuts against the gear element through a slope.

Preferably, the gear piece is provided with a first protruding portion protruding towards the bolt, an abutting curved surface and an abutting plane are arranged at the end portion of the first protruding portion, the gear piece abuts against the slope through the abutting curved surface, and the abutting plane is suitable for abutting against the upper pipe wall of the shell.

The application provides another technical scheme: a safety seat employing the above-described anti-recoil ISOFIX mechanism.

Compared with the prior art, the beneficial effect of this application lies in: when an accident such as rear-end collision occurs to the automobile, the gear piece is matched with the locking device to prevent the gear piece from rotating and unlocking, so that the position of the shell relative to the sleeve is locked, the shell is prevented from retracting instantaneously relative to the sleeve, the trend of the child safety seat moving towards the backrest of the automobile under the collision inertia is converted into instantaneous upward jump, the acceleration of the child from the spine to the head is effectively reduced, and the child safety seat plays a role in protecting the child.

Drawings

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

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

FIG. 3 is a schematic diagram of an assembled configuration of an anti-recoil ISOFIX mechanism provided herein;

FIG. 4 is a schematic diagram of an exploded construction of the anti-recoil ISOFIX mechanism;

FIG. 5 is a schematic view of the anti-retract ISOFIX mechanism with the latch in the initial position;

FIG. 6 is an enlarged schematic view of the partial structure A of FIG. 5;

FIG. 7 is a schematic illustration of the interference between the latch and the gear when the rotational speed of the gear is greater than or equal to a predetermined speed;

FIG. 8 is a schematic view of the latch yielding gear when the rotational speed of the gear is small;

FIG. 9 is a schematic view of the structure of the locking device;

in the figure: 10. a sleeve; 1a, gear holes; 20. a housing; 30. a gear member; 31. a first convex portion; 311. a contact curved surface; 312. an abutting plane; 32. a second convex portion; 321. a locking protrusion; 33. a reset member; 40. a locking device; 41. a limit shell; 41a, horizontal segment; 41b, a vertical section; 41c, openings; 411. a first limit part; 412. a second limit part; 42. a first elastic member; 43. a second elastic member; 44. a plug pin; 441. a first end; 442. a second end; 451. a cover body; 452. and a box body.

Detailed Description

The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.

In the description of the present application, it should be noted that, for the azimuth terms such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific protection scope of the present application that the device or element referred to must have a specific azimuth configuration and operation, as indicated or implied.

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 objects and not necessarily for describing a particular sequential or chronological order.

The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present 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 that are expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 and 2 show a conventional ISOFIX mechanism, when an accident such as a rear-end collision occurs in an automobile, an automobile seat accelerates forward along with the whole automobile, according to the direction shown in fig. 1, an anchor rod 01 on the automobile applies a leftward force to a latch 02, 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 locking block 04, the latch 02 has no space for rotating inwards relative to the inner sleeve 03, the latch 02 transmits the acting force transmitted by the anchor rod 01 to the inner sleeve 03 through the first rotating shaft 021, the inner sleeve 03 moves leftwards, the inner sleeve 03 drives a gear 05 to move leftwards through a second rotating shaft 051, at this time, the whole child safety seat moves leftwards due to the inertia effect to the backrest direction of the automobile seat, the outer sleeve 06 moves rightwards relative to the inner sleeve 03, the top of the gear 05 is driven by a gear hole 06a trend of rightward movement relative to the second rotating shaft 051, and further the gear 05 rotates, the connecting locking block 04 does not interfere with the gear 05 in the process, the top of the gear 05 moves leftwards relative to the gear 03 as shown in fig. 2, the position 06 moves leftwards relative to the seat back of the seat, the child safety seat is damaged, and the child seat is more easily moves leftwards due to the action of the inertia effect of the seat, and the child safety seat is damaged, and the child seat moves backwards in the direction relative to the position.

To solve this problem, the present application provides an anti-retraction ISOFIX mechanism, as shown in fig. 3 to 9, which comprises a sleeve 10 and a housing 20 slidably disposed in the sleeve 10, wherein a gear member 30 is disposed in the housing 20, the gear member 30 is adapted to rotate to unlock the sleeve 10, a locking device 40 is further disposed in the housing 20, the locking device 40 comprises a limiting shell 41, and a first elastic member 42, a second elastic member 43 and a latch 44 disposed on the limiting shell 41, the first elastic member 42 is adapted to apply a first force F to the latch 44 ₁ The second elastic member 43 is adapted to apply a first force F to the latch 44 ₁ Intersecting secondActing force F ₂ First acting force F ₁ With a second acting force F ₂ The pin 44 is maintained at the initial position in cooperation with the automobile at the instant of collision, the gear piece 30 instantaneously rotates to abut against and drive the first end 441 of the pin 44, so that the pin 44 has a rotating trend, and when the rotating speed of the gear piece 30 is greater than or equal to a preset speed, a larger thrust is applied to the first end 441, so that the pin 44 overcomes the first acting force F simultaneously ₁ Second acting force F ₂ The limiting shell 41 rotates, the limiting shell 41 is suitable for abutting against the second end 442 of the latch 44 to stop the latch 44 from rotating, the first end 441 blocks the rotation of the gear member 30, the gear member 30 cannot be unlocked, the shell 20 cannot retract into the sleeve 10, when the rotating speed of the gear member 30 is lower than a preset speed, a small pushing force is applied to the first end 441, and the latch 44 overcomes the first acting force F ₁ Sliding occurs to clear the gear member 30 and the housing 20 is retracted into the sleeve 10 after the gear member 30 unlocks the sleeve 10.

Specifically, the gear 30 is rotatably disposed in the housing 20, the locking protrusion 321 of the gear 30 is adapted to be inserted into the gear hole 1a of the sleeve 10 through the upper pipe wall of the housing 20, at this time, the gear 30 is at the locking position, the sleeve 10 is locked with respect to the housing 20, when the car is involved in a collision accident such as a rear-end collision, the whole car is accelerated, and in the case that the locking device 40 is not disposed, the greater the acceleration of the housing 20 with respect to the sleeve 10 is, the faster the moving speed of the housing 20 retracting into the sleeve 10 is, so that the speed of the gear 30 rotating the unlocking sleeve 10 is faster, and the faster the rotating speed of the gear 30 is. Similarly, when the lock device 40 is disposed, the acceleration of the housing 20 relative to the sleeve 10 is larger, the rotational speed of the gear 30 is faster, and further, the gear 30 can generate larger thrust force to the latch 44, the component forces of the thrust forces in different directions respectively act on the first elastic member 42 and the second elastic member 43, when the thrust force is smaller, as shown in fig. 8, the thrust force can only deform the first elastic member 42, the second elastic member cannot be deformed, the latch 44 cannot rotate, only slides along with the deformation of the first elastic member 42, the first end 441 is retracted to the inside of the opening 41c, no interference of the first end 441 exists, the gear 30 can normally rotate the unlocking sleeve 10, when the rotational speed of the gear 30 is larger, the thrust force is larger, as shown in fig. 7, not only the first elastic member 42 is deformed, but also the second elastic member 43 is deformed, the latch 44 can rotate, the latch 44 is abutted against the limiting shell 41 and cannot rotate further after rotating a certain angle, the gear piece 30 is blocked by the latch 44 and cannot rotate continuously, the locking protrusion 321 is kept at the position of the locking sleeve 10 in the gear hole 1a, the shell 20 cannot retract into the sleeve 10, and further, the trend of the child safety seat moving towards the backrest direction of the automobile under the collision inertia is converted into the movement of instantly jumping upwards, so that the acceleration of the child from the spine to the head direction is effectively reduced, the protection effect is achieved on the child, when the acceleration is reduced to a certain value after the collision, the latch 44 automatically returns to the initial position under the action of the first elastic piece 42 and the second elastic piece 43, as shown in fig. 5, the latch 44 is in the initial position, so that the position of the locking sleeve 10 is again acted when the next collision accident happens, the gear piece 30 is also provided with the corresponding reset piece 33, the gear member 30 can be reset by the reset member 33.

It can be understood that the situation of low acceleration generally occurs during normal running of the automobile or during installation of the safety seat in the automobile seat, and the situation of high acceleration occurs during a collision accident such as a rear-end collision of the automobile, and by selecting the elastic coefficients of the first elastic member 42 and the second elastic member 43, the first elastic member 42 can be deformed when the acceleration is low, that is, the gear member 30 applies a small thrust to the latch 44, and the second elastic member 43 can be deformed when the acceleration is high, that is, the thrust of the gear member 30 is high.

In this embodiment, as shown in fig. 6, the first elastic member 42 and the latch 44 are disposed on the same line along the length direction of the housing 20, and the first force F ₁ The second elastic member 43 is disposed along the height direction of the housing 20 and acts on the latch 44 along the length direction of the housing 20, and the second acting force F ₂ Acting on the latch 44 in the height direction of the housing 20. The support of the second elastic piece 43 can keep the bolt 44 horizontal, and when the rotation speed of the gear piece 30 is low and the thrust is small, the bolt 44 overcomes the first acting force F under the support of the second elastic piece 43 ₁ And sliding back and forth.

Further, the first elastic member 42 is a spring, one end of the first elastic member 42 is mounted on the limiting shell 41, and the other end is adapted to abut against an end surface of the second end 442 of the latch 44. The spring has low use cost, different spring coefficients of springs with different wire diameters, materials and effective turns, and wide selection range.

Similarly, the second elastic member 43 is a spring, and one end of the second elastic member 43 is mounted on the limiting shell 41, and the other end is adapted to abut against the bottom surface of the latch 44.

Correspondingly, as shown in fig. 6, the limiting shell 41 is provided with an installation cavity, the installation cavity comprises a horizontal section 41a and a vertical section 41b, an opening 41c is formed in one side, close to the gear piece 30, of the horizontal section 41a, a first elastic piece 42 is arranged on one side, far away from the opening 41c, of the horizontal section 41a, a second elastic piece 43 is arranged in the vertical section 41b, when the plug 44 is in an initial position, the end face of the second end 442 is in contact with the first elastic piece 42 above the vertical section 41b, the first end 441 of the plug 44 extends out of the opening 41c to above the gear piece 30, as shown in fig. 7, a first limiting part 411 suitable for being in contact with the end face of the second end 442 is arranged at the junction of one side, close to the gear piece 30, of the vertical section 41b and the opening 41c, a second limiting part 412 suitable for being in contact with the bottom face of the plug 44 is arranged between one side, close to the gear piece 30, of the vertical section 41b, and the limiting shell 20 on the upper side and the lower side of the opening 41c is suitable for being in contact with the upper side and the lower side of the first end 441 respectively.

Specifically, the first limiting portion 411 is a rounded corner, the end face of the second end portion 442 is a plane, the friction force is small when the first limiting portion 411 and the second end portion 442 are contacted, and the end face of the second end portion 442 abuts against the first limiting portion 411 to prevent the latch 44 from moving leftwards.

The second limiting portion 412 is an inclined surface disposed toward the second end 442, the bottom surface of the latch 44 is a plane, and the inclined surface is disposed opposite to the bottom surface of the latch 44, so as to limit the rotation angle of the latch 44.

In order to make the latch 44 and the gear member 30 perform a better linkage function, the first end 441 is wedge-shaped, the first end 441 is abutted against the gear member 30 through a slope, the gear member 30 can continuously apply force to the latch 44 through the slope, and along with sliding or rotating of the latch 44, the gear member 30 and the latch 44 can slide smoothly relatively, so that no jamming occurs.

Correspondingly, as shown in fig. 8, the gear member 30 is rotationally connected with the housing 20 through a rotating shaft, a first protrusion 31 protruding toward the latch 44 is arranged on one side of the rotating shaft, a second protrusion 32 is arranged on the other side of the rotating shaft, a locking protrusion 321 is arranged on the second protrusion 32, when the second protrusion 32 rotates downwards, the first protrusion 31 rotates upwards to abut against the latch 44, an abutting curved surface 311 and an abutting plane 312 are arranged at the end part of the first protrusion 31, the gear member 30 abuts against the slope through the abutting curved surface 311, so that the friction force between the gear member 30 and the slope member of the latch 44 is reduced, the abutting plane 312 is suitable for abutting against the upper pipe wall of the housing 20, and the upper pipe wall of the housing 20 abuts against the abutting plane 312 to limit the rotation stroke of the gear member 30 when the latch 44 does not interfere with the rotation of the gear member 30.

Referring to fig. 6 and 9, for more convenient assembly of the whole locking device 40, and for convenient processing of the structure such as the installation cavity, the first limiting portion 411, the second limiting portion 412 and the like inside the limiting shell 41, the limiting shell 41 is detachable, further, the limiting shell 41 may be assembled by the cover body 451 and the box body 452, and the installation and fixation of the locking device 40 are realized by connecting the box body 452 with the inner wall of the housing 20.

The present application also provides a safety seat that uses the above-described anti-recoil ISOFIX mechanism. The anti-collision device has the advantages of preventing the instant retraction of the instant collision shell 20, avoiding the movement of the child seat to the backrest of the automobile, reducing the penetration injury of acceleration to the child and protecting the child.

The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection of the present application is defined by the appended claims and equivalents thereof.

Claims (9)

1. The utility model provides a prevent retracting ISOFIX mechanism, includes sleeve pipe and slides the casing that sets up in the sleeve pipe, is equipped with the gear in the casing, and the gear is suitable for rotating in order to unblock sleeve pipe, its characterized in that: the locking device comprises a limiting shell, a first elastic piece, a second elastic piece and a bolt, wherein the first elastic piece, the second elastic piece and the bolt are arranged on the limiting shell, the second elastic piece is arranged along the height direction of the shell and is suitable for exerting second acting force along the height direction of the shell on the bolt, the first elastic piece and the bolt are arranged on the same straight line along the length direction of the shell, the first elastic piece is suitable for exerting first acting force along the length direction of the shell on the bolt so that the bolt is maintained at an initial position, the bolt is provided with a first end part and a second end part, the gear piece instantaneously rotates and is abutted against the first end part in the instant of collision of an automobile, and the limiting shell is abutted against the second end part when the bolt is driven to rotate by the gear piece.

2. The anti-recoil ISOFIX mechanism of claim 1, wherein: the first elastic piece is a spring, one end of the first elastic piece is installed on the limiting shell, and the other end of the first elastic piece is suitable for abutting against the end face of the second end portion of the bolt.

3. The anti-recoil ISOFIX mechanism of claim 2, wherein: the second elastic piece is a spring, one end of the second elastic piece is installed on the limiting shell, and the other end of the second elastic piece is suitable for abutting against the bottom surface of the bolt.

4. A retraction-preventing ISOFIX mechanism according to any one of claims 1 to 3, wherein: the limiting shell is provided with an installing cavity, the installing cavity comprises a horizontal section and a vertical section, an opening is formed in one side of the horizontal section, which is close to the gear piece, a first elastic piece is arranged in the horizontal section and is away from one side of the opening, a second elastic piece is arranged in the vertical section, when the bolt is in an initial position, the end face of the second end portion is in the upper side of the vertical section and is in conflict with the first elastic piece, the first end portion of the bolt extends from the opening to the upper side of the gear piece, a first limiting portion which is suitable for being in conflict with the end face of the second end portion is arranged at the juncture of one side of the vertical section, which is close to the gear piece, and a second limiting portion which is suitable for being in conflict with the bottom face of the bolt is arranged between the opening, and limiting shell bodies on the upper side and the lower side of the opening are respectively suitable for being in conflict with the upper side and the lower side of the first end portion.

5. The anti-recoil ISOFIX mechanism of claim 4, wherein: the first limiting part is a round angle, and the end face of the second end part is a plane.

6. The anti-recoil ISOFIX mechanism of claim 4, wherein: the second limiting part is an inclined surface arranged towards the second end part, and the bottom surface of the bolt is a plane.

7. A retraction-preventing ISOFIX mechanism according to any one of claims 1 to 3, wherein: the first end is wedge-shaped, and the first end is abutted against the gear piece through a slope surface.

8. The anti-recoil ISOFIX mechanism of claim 7, wherein: the gear piece is provided with a first convex part protruding towards the bolt, the end part of the first convex part is provided with a collision curved surface and a collision plane, the gear piece is in collision with the slope through the collision curved surface, and the collision plane is suitable for being in collision with the upper pipe wall of the shell.

9. Safety seat, its characterized in that: comprising an anti-recoil ISOFIX mechanism according to any of claims 1-8.

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