WO2018054249A1 - 儿童安全座椅支撑座 - Google Patents

儿童安全座椅支撑座 Download PDF

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Publication number
WO2018054249A1
WO2018054249A1 PCT/CN2017/101476 CN2017101476W WO2018054249A1 WO 2018054249 A1 WO2018054249 A1 WO 2018054249A1 CN 2017101476 W CN2017101476 W CN 2017101476W WO 2018054249 A1 WO2018054249 A1 WO 2018054249A1
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WO
WIPO (PCT)
Prior art keywords
telescopic
structural member
locking mechanism
safety seat
child safety
Prior art date
Application number
PCT/CN2017/101476
Other languages
English (en)
French (fr)
Inventor
刘修平
Original Assignee
珠海阳光儿童用品有限公司
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Filing date
Publication date
Application filed by 珠海阳光儿童用品有限公司 filed Critical 珠海阳光儿童用品有限公司
Publication of WO2018054249A1 publication Critical patent/WO2018054249A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B60N2/2821—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle having a seat and a base part
    • B60N2/2824—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle having a seat and a base part part of the base being supported by the vehicle frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle

Definitions

  • the present invention relates to the field of child safety seats, and more particularly to a child safety seat support.
  • a child safety seat is a seat that effectively enhances the safety of a child by securing a child in a safety seat. In the event of a car crash or sudden deceleration, the seat can reduce the impact on the child and limit the child's body movement to reduce the damage to them.
  • child safety seats based on the European mandatory standard ISOFIX interface are widely used.
  • the front end of the support seat on which the seat is mounted is provided with support legs to form a reliable support with the inner floor of the vehicle, thereby improving the safety protection effect of the child seat.
  • the child safety seat itself occupies a large space usually, when the child safety seat is not required, the user often needs to disassemble it, and when the child safety seat is needed Then install again. Therefore, this further requires that the support itself can be contracted or folded.
  • the user When installing an existing child seat support, the user often needs to operate in multiple steps, including placing the support seat on the plane of the vehicle seat, connecting the ISOFIX interface, and then operating the telescopic button on the support leg to extend the support leg. Release the appropriate length and then loosen the telescopic button to lock the support legs.
  • the entire installation process is cumbersome and requires a certain amount of user experience. For inexperienced or careless users, the support legs may not be adjusted properly, they may not be well pressed against the ground, or the telescopic buttons may not be properly locked, so that the support legs are in a retractable state, which leads to A certain security risk.
  • the object of the present invention is to provide a child safety seat support seat, which can simplify the installation and ensure the safety seat is fixed by using the support legs and the ISOFIX mechanism at the same time, thereby eliminating the safety hazard during the installation of the user, so as to achieve good protection. effect.
  • the present invention provides a child safety seat support base including a support base for supporting a child safety seat, and a support leg connected to a front end of the support base. And a supporting function is formed between the inner floor of the vehicle and the supporting base, wherein the supporting leg comprises a telescopic mechanism and a one-way locking mechanism, and the one-way locking mechanism is disposed in the telescopic mechanism to be relatively telescopic Between the moving parts, the telescopic mechanism is unidirectionally elongated and cannot be reversely retracted.
  • a unidirectional locking state release switch is further disposed on the support leg, and the one-way locking state release switch is connected to the one-way locking mechanism, and the one-way locking mechanism can be released.
  • the one-way locking state of the telescopic mechanism is further disposed on the support leg, and the one-way locking state release switch is connected to the one-way locking mechanism, and the one-way locking mechanism can be released. The one-way locking state of the telescopic mechanism.
  • the one-way locking mechanism is a one-way ratchet locking mechanism, including: a ratchet bar and a pawl member, the one-way locking state release switch is connected to the pawl member, the one-way When the lock state release switch is in the normally closed state, the pawl member can be abutted against the ratchet bar, and the one-way lock is activated when the one-way lock state release switch is triggered by an external force.
  • the state release switch can move the pawl member away from the position of the ratchet bar, and release the one-way locking state of the one-way locking mechanism to the telescopic mechanism.
  • the telescopic mechanism comprises an upper telescopic structural member and a lower telescopic structural member, the upper telescopic structural member is rotatably coupled to a lower bottom surface of the support base, and one of the ratchet strip and the pawl member is disposed at the The telescopic structural member is described above, and the other is disposed on the lower telescopic structural member.
  • the upper telescopic structural member is a hollow tubular member
  • the lower telescopic structural member is sleeved in the hollow tubular member and is slidable relative to a linear direction of the upper telescopic structural member
  • the ratchet strip is longitudinally disposed
  • the pawl member is disposed on the lower telescopic structural member and is rotatable relative to the lower telescopic structural member.
  • the lower end of the lower telescopic structural member is further provided with a foot, the one-way locking state release switch is disposed on the foot, and the one-way locking state release switch passes the connecting member and the spine The jaw members are connected.
  • the one-way locking mechanism further includes a first elastic element capable of maintaining the one-way locked state release switch in a normally closed state and released in the one-way locked state After the switch is triggered by the external force, the one-way lock state release switch can be restored to the normally closed state when the one-way lock state release switch is released.
  • the lower telescopic structural member is a symmetrical tubular member having an I-shaped cross section, and an I-shaped groove is disposed on both sides of the symmetrical tubular member, and the ratchet strip is symmetrically disposed on the inner side of the hollow tubular member.
  • the corresponding position of the I-shaped groove, the pawl member is rotatably mounted in the I-shaped groove by a rotating shaft.
  • a telescopic locking mechanism is disposed between the support base and the support leg, the telescopic mechanism includes an upper telescopic structural member and a lower telescopic structural member, and the upper telescopic structural member is rotatably coupled to the support base
  • the telescopic locking mechanism can lock the lower telescopic a structural member, so that the lower telescopic structural member and the upper telescopic structural member cannot slide relative to each other; in the unlocked state of the telescopic locking mechanism, the telescopic locking mechanism can unlock the lower telescopic structural member So that the lower telescopic structural member automatically slides downward relative to the upper telescopic structural member under the action of gravity until the supporting force position is supported.
  • an ISOFIX connecting member is further disposed on the supporting base, and the ISOFIX connecting member forms an operative connection with the telescopic locking mechanism, so that the ISOFIX connecting member is correctly connected to the vehicle mounting interface. At this time, the telescopic locking mechanism is driven to switch from the permanent locked state to the unlocked state.
  • connection support member for connecting with the child safety seat and supporting the child safety seat is further disposed on the support base, and the operability is formed between the connection support member and the telescopic locking mechanism The connection is such that when the child safety seat is properly mounted on the support base and against the connection support member, the telescopic locking mechanism is driven to switch from a permanent locked state to an unlocked state.
  • the telescopic locking mechanism includes a rotary switch and a second elastic member, the rotary switch is rotatably connected to the upper telescopic structural member, and the second elastic member is coupled to the rotary switch, and the rotary switch is at The elastic force of the second elastic member maintains the normal state as a locked state, and is released from the locked state by the elastic force of the second elastic member under the action of the external force.
  • the support base is further provided with a U-shaped push rod and a pair of drive rods, and the push rod segments on both sides of the U-shaped push rod are provided with a plurality of card slots, and the bottom of the U-shaped push rods
  • the push rod segment is on one side of the telescopic locking mechanism, one end of the driving rod is slidably connected with the ISOFIX connecting member, and the other end is provided with a convex structure, which can be pushed on both sides of the U-shaped push rod
  • the card slot of the rod segment is engaged, and when the ISOFIX connector is properly connected to the vehicle mounting interface, the U-shaped push rod can be pushed toward the telescopic locking mechanism by pushing the support base to push the
  • the telescopic locking mechanism is switched from a permanent locked state to an unlocked state.
  • the support base is further provided with an ISOFIX expansion member
  • the ISOFIX expansion member is fixedly connected with the ISOFIX connector, and can be extended or retracted relative to the support base
  • the ISOFIX expansion member is also a plurality of card slots are provided, and when the ISOFIX connector is not connected to the vehicle mounting interface, the protruding structure of the other end of the driving rod can be engaged with any slot of the ISOFIX telescopic member, and When the ISOFIX connecting member is correctly connected to the vehicle mounting interface, the protruding structure of the driving rod can be disengaged from the ISOFIX telescopic member by pushing the supporting base, and the push rods on both sides of the U-shaped push rod The card slot of the segment is engaged to drive the U-shaped push rod to move toward the telescopic locking mechanism.
  • the protruding structure is a unidirectional convex structure
  • a third elastic element is further disposed between the supporting base and the other end of the driving rod, when the supporting base is not subjected to thrust, One-way raised structure can The elastic force of the third elastic element is released from the card slot of the push rod segments on both sides of the U-shaped push rod.
  • the one-way locking mechanism is a one-way wedge locking mechanism, comprising: a toothed groove and a wedge block, the wedge block having a convex tooth and a wedge surface corresponding to the toothed groove, the wedge shape a pull cord is connected to the block, and the one-way lock state release switch is connected to the drawstring.
  • the wedge block is downwardly facing the wedge under the action of gravity.
  • the one-way locked state release switch drives the The wedge block slides upward along the wedge shape such that the protruding teeth of the wedge block are disengaged from the toothed groove, and the one-way locking mechanism is released from the one-way locking state of the telescopic mechanism.
  • the telescopic mechanism includes an upper telescopic structural member and a lower telescopic structural member, and the upper telescopic structural member is rotatably coupled to a lower bottom surface of the support base, and an upper end of the lower telescopic structural member is provided with the wedge shape a wedge-shaped mating wedge-shaped mating surface on the block, the toothed groove is longitudinally disposed on an inner side of the upper telescopic structural member, and the wedge-shaped block is disposed on a wedge-shaped mating surface of the toothed groove and the lower telescopic structural member between.
  • the invention further includes a guiding tube fixed on the lower telescopic structural member, and the pulling rope is taken out through the guiding tube to the outside of the telescopic mechanism, and the upper telescopic structural member is further Providing a guiding limit groove matched with the guiding tube, and the sliding guiding of the lower telescopic structural member relative to the upper telescopic structural member can be realized by the sliding of the guiding tube in the guiding limiting groove .
  • the one-way locking mechanism includes two wedge-shaped blocks symmetrically along a longitudinal line of the lower telescopic structural member, and the two pull-up cords respectively led by the two wedge-shaped blocks are respectively guided from the guide Both ends of the tube are led out, or the drawstring is connected and taken out from either end of the guide tube.
  • the support leg of the present invention allows the telescopic mechanism to be unidirectionally extended by the one-way locking mechanism and cannot be reversely retracted, so that the user only needs to push the telescopic mechanism into the vehicle during installation.
  • the floor direction extends or automatically extends to the interior floor of the vehicle by the weight of the support leg itself, without the user having to adjust the extension length of the telescopic mechanism of the support leg, and can automatically lock when the telescopic mechanism is extended to a suitable position.
  • the support legs can form a good support for the child safety seat, avoiding the child safety seat turning forward and causing personal injury to the child, thereby ensuring the simultaneous use of the support legs and ISOFIX
  • the mechanism fixes the safety seat, which eliminates the safety hazard during the installation of the user and achieves a good protection effect.
  • FIG. 1 is a schematic view showing the mounting structure of an embodiment of a child safety seat support base of the present invention.
  • FIG. 2 is a schematic exploded view of an embodiment of a child safety seat support of the present invention.
  • FIG 3 is a cross-sectional view of a support leg in an embodiment of a child safety seat support of the present invention.
  • FIGS. 4 and 5 are schematic views showing the telescopic locking mechanism in the locked and unlocked positions in the embodiment of the child safety seat support of the present invention.
  • FIG. 6 is a schematic structural view of a lower telescopic structural member in an embodiment of a child safety seat support according to the present invention.
  • Figure 7 is a schematic view showing the structure of a driving rod in the embodiment of the child safety seat support of the present invention.
  • FIG 8 and 9 are respectively a schematic view of the inside and the side of the support leg in another embodiment of the child safety seat support of the present invention.
  • FIG. 1 is a schematic view showing the installation structure of an embodiment of a child safety seat support base of the present invention.
  • the child safety seat support (hereinafter also referred to as a support base) includes a support base 2 and a support leg 1.
  • the support base 2 is for mounting a child safety seat, and the support leg 1 is connected to the front end of the support base 2 (corresponding to the side close to the vehicle head in the mounted state) for between the inner floor of the vehicle and the support base 2 Form a supporting role.
  • the support base 2 shown in Fig. 1 does not show a portion of the upper layer for supporting the child safety seat and being connected to the child safety seat.
  • the support leg 1 includes a telescopic mechanism and a one-way lock mechanism.
  • the telescopic mechanism is a main body structure in which the support leg 1 is extended or shortened, and the telescopic function of the telescopic mechanism can realize the folding and installation of the child safety seat support seat.
  • the one-way locking mechanism is disposed between the members of the telescopic mechanism that are relatively telescopically movable for unidirectionally extending the telescopic mechanism without being reversely retracted.
  • the term "unidirectional elongation" as used herein means that when the child safety seat support is mounted on a seat in the vehicle and connected, the support leg 1 which is originally in the retracted state can be elongated toward the floor in the vehicle until the top Tight inside the car floor.
  • the one-way elongation can make the user's installation operation more convenient, and the user does not need to adjust the length of the support leg by experience, but only needs to pull the telescopic mechanism in a single direction toward the floor of the vehicle during installation, or The weight of the support leg itself is automatically extended to the floor of the vehicle.
  • the fact that the reverse retraction does not restrict the support leg 1 from reversing in the direction in which it is extended, that is, from the ground toward the child safety seat support.
  • This restriction of the support legs allows the support legs of the child safety seat support to be easily installed and supported on the ground.
  • the support legs that are restricted from retracting can ensure that they form a good supporting effect on the supporting base and reduce the personal injury to the child.
  • the support legs and the ISOFIX mechanism are used simultaneously to fix the safety seat, the safety hazard during the installation of the user is eliminated, thereby achieving good protection.
  • the one-way lock of the telescopic mechanism can be released by the one-way lock state release switch 5 further provided on the support leg 1.
  • the one-way lock state release switch 5 is connected to the one-way lock mechanism, and the one-way lock mechanism of the one-way lock mechanism to the telescopic mechanism can be released.
  • the one-way locking state release switch 5 can be in the form of a button or a handle, etc., and the user can conveniently realize the folding of the telescopic mechanism of the support leg 1 by operating the switch, thereby further realizing the support seat in the vehicle seat. Disassembly on.
  • Fig. 3 shows an example of the structure of a one-way locking mechanism which is a normally closed one-way ratchet locking mechanism 6, which includes a ratchet strip 6.2 and a pawl member 6.1, one-way
  • the lock state release switch 5 is connected to the pawl member 6.1.
  • the pawl member 6.1 can be abutted against the ratchet bar 6.2 so that the pawl member 6.1 can effectively block the retracting direction of the ratchet bar 6.2 in the telescopic mechanism
  • the upper movement, while the pawl member 6.1 does not obstruct the extension of the telescopic mechanism.
  • the one-way lock state release switch 5 When the one-way lock state release switch 5 is activated by an external force (for example, the user presses the one-way lock state release switch 5 with a finger or a palm), the one-way lock state release switch 5 can drive the pawl member 6.1 to leave. Abutting against the position of the ratchet strip 6.2, the one-way locking mechanism of the one-way locking mechanism is released, and the ratchet strip 6.2 is freely movable in both the extending and retracting directions of the telescopic mechanism, thereby The telescopic mechanism is free to expand and contract.
  • an external force for example, the user presses the one-way lock state release switch 5 with a finger or a palm
  • the telescopic mechanism may specifically include an upper telescopic structural member 1.1 and a lower telescopic structural member 1.2.
  • the upper telescopic structural member 1.1 is rotatably coupled to the lower bottom surface of the support base 2
  • the ratchet strip 6.2 is disposed on the upper telescopic structural member 1.1
  • the pawl member 6.1 is disposed on the lower telescopic structural member 1.2.
  • the ratchet strip 6.2 can also be disposed on the lower telescoping structural member 1.2, and correspondingly, the pawl member 6.1 is disposed on the upper telescoping structural member 1.1.
  • the upper telescopic structural member 1.1 may take the form of a hollow tubular member, and the lower telescopic structural member 1.2 is sleeved within the hollow tubular member, and the lower telescopic structural member 1.2 is slidable relative to the linear direction of the upper telescopic structural member 1.1.
  • the ratchet strip 6.2 can be longitudinally disposed on the inside of the hollow tubular member, and the pawl member 6.1 is disposed on the lower telescopic structural member 1.2 and is rotatable relative to the lower telescopic structural member 1.2.
  • the lower telescopic structural member 1.2 is preferably a symmetrical tubular member having an I-shaped cross section, and an I-shaped groove 1.7 is provided on both sides of the symmetrical tubular member, and the ratchet strip 6.2 is symmetrically disposed.
  • the inside of the hollow tubular member is at a position corresponding to the I-shaped groove 1.7, and the pawl member 6.1 is rotatably mounted in the I-shaped groove 1.7 through the rotating shaft.
  • the I-shaped groove provides a accommodating space for the one-way locking mechanism while controlling the overall lateral width, so that the support leg is more compact overall, and the hollow structure can also reduce the overall weight of the support leg and save material.
  • the lower telescopic structural member 1.2 In order to enable the lower telescopic structural member 1.2 to form a good support with the inner floor of the vehicle, it is preferable to provide a foot 1.3 at the lower end of the lower telescopic structural member 1.2, and a one-way locking state release switch 5 for the foot 1.3, which can be passed by the user.
  • the one-way lock state release switch 5 on the foot 1.3 is pressed to perform the one-way lock state unlocking operation, thereby achieving the folding of the support leg 1.
  • the one-way locking state release switch 5 is connected to the pawl member 6.1 through the connecting member 1.4.
  • the connecting member 1.4 may be in the form of a hard rod or a wire rope, and the one-way locking state release switch 5 is a protrusion.
  • the one-way lock state release switch 5 can drive the connecting member 1.4 to move downward, and this downward movement is transmitted to the upper pawl member 6.1, and the pawl member 6.1 is driven. Move to not limit the position of the ratchet strip 6.2.
  • the movement of the connecting member 1.4 in Fig. 3 can cause the pawl member 6.1 to rotate such that the pawl of the pawl member 6.1 is upturned away from the teeth of the ratchet strip 6.2.
  • the connecting piece 1.4 in the form of a hard rod, it can be connected with the ratchet member 6.1 by the cooperation of the long groove and the sliding rod, so as to prevent the connecting piece 1.4 from swinging too much and interfering with the movement of other parts.
  • the one-way locking mechanism may include a plurality of, for example, two, and is symmetric with respect to a longitudinal center line of the lower telescopic structural member or the upper telescopic structural member, so that the telescopic mechanism obtains a more balanced motion effect and avoids one-sided eccentric wear. The resulting wear and movement are limited.
  • the first elastic member 1.5 may be further disposed in the foot 1.3 as a part of the one-way locking mechanism, and the first elastic member 1.5 can maintain the one-way locking state release switch 5 in the normally closed state, and After the one-way lock state release switch 5 is triggered by an external force, the one-way lock state release switch 5 can be returned to the normally closed state when the one-way lock state release switch 5 is released.
  • the one-way locking mechanism may employ other existing one-way locking mechanisms in addition to the one-way ratchet locking mechanism described above, for example, a one-way locking mechanism using a one-way friction plate.
  • 8-9 also show another possible one-way locking mechanism, which is a one-way wedge locking mechanism 7, comprising: a toothed groove 7.1 and a wedge block 7.2, said wedge shape
  • the block 7.2 has a convex tooth 7.3 and a wedge surface corresponding to the toothed groove 7.1, and the pull wire 7.4 and the drawstring 7.5 are connected to the wedge block 7.2, and the one-way lock state release switch 5 and the pull cord 7.4 are Pull cord 7.5 connection.
  • the one-way lock state release switch 5 may be another button or a handle, or may be a pull cord 7.4. And the rope head of the drawstring 7.5.
  • the wedge block 7.2 slides downward along the wedge shape under the force of gravity, so that the convex teeth 7.3 of the wedge block 7.2 are embedded in the toothed groove 7.1.
  • the one-way lock state release switch 5 drives the wedge block 7.2 to slide upward along the wedge shape by the pull cords 7.4, 7.5, so that the The protruding teeth 7.3 of the wedge block 7.2 are disengaged from the toothed groove 7.1, and the one-way locking mechanism is released from the one-way locking state of the telescopic mechanism.
  • the telescopic mechanism may specifically include an upper telescopic structural member 1.1 and a lower telescopic structural member 1.2.
  • the upper telescopic structural member 1.1 is rotatably coupled to a lower bottom surface of the support base 2, and the lower telescopic structural member 1.2
  • the upper end is provided with a wedge-shaped mating surface that cooperates with a wedge-shaped surface on the wedge block 7.2.
  • the tooth-shaped groove 7.1 is longitudinally disposed on the inner side of the upper telescopic structural member 1.1, and the wedge-shaped block 7.2 is disposed on the toothed shape. Between the groove 7.1 and the wedge-shaped mating surface of the lower telescoping structure 1.2. Referring to FIG.
  • the upper telescopic structural member 1.1 can be disposed to have a hollow inner cavity
  • the lower telescopic structural member 1.2 is disposed in the hollow inner cavity and can be in the longitudinal direction of the upper telescopic structural member 1.1 with respect to the upper telescopic structural member 1.1. motion.
  • the upper end of the lower telescopic structural member 1.2 may be provided in a trapezoidal shape to form a wedge-shaped mating surface.
  • the child safety seat support further includes a guiding tube 7.6 fixed to the lower telescopic structural member 1.2, the pulling The rope 7.4, 7.5 is led out through the guide tube 7.6 to the outside of the telescopic mechanism, and the upper telescopic structural member 1.1 is further provided with a guiding limit groove 7.7 which cooperates with the guiding tube 7.6, through the guiding The sliding of the tube 7.6 within the guiding stop groove 7.7 enables the movement guiding and extreme position definition of the lower telescopic structural member 1.2 relative to the upper telescopic structural member 1.1.
  • the one-way locking mechanism may include two of the wedge-shaped blocks 7.2 symmetric along the longitudinal direction center line of the lower telescopic structural member 1.2.
  • the drawstrings 7.4, 7.5 respectively led by the two wedge blocks 7.2 can be respectively led out from both ends of the guide tube 7.6 for the user to pull at the same time.
  • the cord 7.4 and the drawstring 7.5 are used to unlock the one-way locked state.
  • the pull cord 7.4 and the pull cord 7.5 may be first connected and then pulled out from either end of the guide tube 7.6 so that the user only needs to pull on one side to complete the unlocking.
  • the present invention also provides a related function and structure of the telescopic locking in another embodiment, that is, a telescopic locking mechanism 3 is provided between the support base 2 and the support leg 1.
  • the telescopic mechanism includes an upper telescopic structural member 1.1 and a lower telescopic structural member 1.2, and the upper telescopic structural member 1.1 is rotatably coupled to the lower bottom surface of the support base 2.
  • the telescopic locking mechanism 3 can be locked
  • the lower telescopic structural member 1.2 is such that the lower telescopic structural member 1.2 and the upper telescopic structural member 1.1 cannot slide relative to each other.
  • the telescopic locking mechanism 3 can release the locking action on the lower telescopic structural member 1.2, so that the lower telescopic structural member 1.2 is automatically opposed to the The upper telescopic structural member 1.1 slides downward until it supports the force receiving position.
  • the lower telescopic structural member 1.2 can also protrude relative to the upper telescopic structural member 1.1 under the force of the user.
  • the telescopic locking mechanism facilitates the user's operation during installation.
  • the locking leg is restrained by the locking state of the telescopic locking mechanism to shorten the length of the support leg, which is convenient for storage and movement, and when used
  • the telescopic locking mechanism can be set to the unlocked state, and the lower telescopic structural member can automatically slide down to reach the supporting force position under the action of gravity, and the one-way locking mechanism has been mentioned in the foregoing.
  • the realization function and principle when the telescopic structural member automatically slides downward under the action of gravity, it is not limited by the one-way locking mechanism; and when the lower telescopic structural member reaches the supporting force position, it is restricted by the one-way locking mechanism. It cannot be reversely retracted, thus obtaining an effective and stable support for the floor inside the car.
  • An ISOFIX connector 4.1 is further disposed on the support base 2, and the ISOFIX connector 4.1 can be located at the rear end of the support base 2 (corresponding to the side close to the tail of the vehicle in the mounted state).
  • the ISOFIX connector 4.1 can An operative connection is formed with the telescoping locking mechanism 3 to drive the telescoping locking mechanism 3 from a permanent locked state to an unlocked state when the ISOFIX connector 4.1 is properly accessed to the vehicle mounting interface.
  • the telescopic locking mechanism 3 includes a rotary switch 3.1 and a second elastic member 3.2, and the rotary switch 3.1 is rotatably coupled to the upper telescopic structural member 1.1.
  • the two elastic members 3.2 are connected to the rotary switch 3.1, and the rotary switch 3.1 maintains a normal state of being locked under the elastic force of the second elastic member 3.2, and overcomes the second elastic member 3.2 under the action of an external force. The elastic force acts out of the locked state.
  • a support rod 3.3 can be fixedly arranged on the upper telescopic structural member 1.1, the rotary switch 3.1 is rotatably disposed on the support rod 3.3, and the second elastic switch 3.1 can be selected.
  • the torsion spring is disposed between the strut 3.3 and the rotary switch 3.1.
  • a structural form of the rotary switch 3.1 is shown in FIG. 4, the rotary switch is L-shaped, including two substantially opposite vertical folding arms, and the first folding arm is used for the hole 1.6 on the lower telescopic structural member 1.2.
  • the mating fit is used to limit the falling of the lower telescopic structural member 1.2, and the second folding arm is upwardly convex, and the first folding arm can be driven away from the hole 1.6 under the pushing of other members, thereby releasing the restriction on the lower telescopic structural member 1.2.
  • the rotary switch 3.1 is not limited to the L-shaped structure, and may be other structures capable of realizing the telescopic locking and unlocking of the lower telescopic structural member 1.2 with respect to the upper telescopic structural member 1.1 by rotation.
  • a U-shaped push rod 4.5 and a pair of driving rods 4.2 are further disposed on the support base 2
  • a plurality of card slots are disposed on the push rod segments of the U-shaped push rod 4.5, and the bottom push rod segment of the U-shaped push rod 4.5 is One side of the telescopic locking mechanism 3.
  • Figure 7 shows an implementation of the drive rod 4.2.
  • One end 4.2.1 of the driving rod 4.2 is slidably connected with the ISOFIX connecting member 4.1, and the other end is provided with a convex structure, and can be combined with any card slot of the push rod segments of the U-shaped push rod 4.5
  • the U-shaped push rod 4.5 can be pushed toward the telescopic locking mechanism 3 by pushing the support base 2 (for example, the top rotation switch 3.1)
  • the second folding arm drives the first folding arm away from the hole 1.6) to push the telescopic locking mechanism 3 from the permanent locking state to the unlocked state.
  • an ISOFIX expansion member 4.3 may be disposed on the support base 2, and the ISOFIX extension member 4.1 and the ISOFIX connection member 4.1 may be fixedly connected by a connecting member such as a pin or a bolt, and can be extended relative to the support base 2. Or retract.
  • the ISOFIX telescoping member 4.3 is also provided with a plurality of card slots (including shallow grooves with no bottom or through holes with bottom holes).
  • the protruding structure of the other end of the driving rod 4.2 can be engaged with any slot of the ISOFIX telescopic member 4.3, and when the ISOFIX connection is When the member 4.1 is correctly connected to the vehicle mounting interface, the protruding structure of the driving rod 4.2 can be disengaged from the ISOFIX telescopic member 4.3 by pushing the supporting base 2, and pushed on both sides of the U-shaped push rod 4.5. The card slot of the lever segment is engaged to drive the U-shaped push rod 4.5 to move toward the telescopic locking mechanism 3.
  • the protruding structure is a unidirectional convex structure 4.2.2, and a third elastic member 4.6 is further disposed between the supporting base 2 and the other end of the driving rod 4.2.
  • the one-way protruding structure 4.2.2 can be disengaged from the slot of the push rod segments on both sides of the U-shaped push rod 4.5 under the elastic force of the third elastic member 4.6.
  • the present invention provides another implementation. That is, the support base 2 is further provided with a connection support member for connecting with the child safety seat and supporting the child safety seat, and the connection support member can form an operability with the telescopic locking mechanism 3
  • the connection is such that when the child safety seat is correctly mounted on the support base 2 and abuts against the connection support member, the telescopic locking mechanism 3 is driven to switch from the permanent locked state to the unlocked state.
  • the lower telescopic structural member 1.2 In the storage state or the unused state of the support base, the lower telescopic structural member 1.2 is in a retracted state relative to the upper telescopic structural member 1.1. At this time, the length of the support leg 1 is the shortest for easy storage.
  • the rotary switch 3.2 of the telescopic locking mechanism 3 is inserted into the hole 1.6 of the lower telescopic structural member 1.2 to prevent the lower telescopic structural member 1.2 from protruding from the upper telescopic structural member 1.1 due to the placement angle or vibration.
  • the user can place the support base on the plane of the vehicle seat and pull the ISOFIX backward relative to the support base 2.
  • the connector 4.1 connects the ISOFIX connector 4.1 to the ISOFIX interface on the vehicle seat. After the connection is completed, the user pushes the support base 2 backwards.
  • one end 4.2.1 of the drive rod 4.2 abuts against the ISOFIX connector 4.1
  • the other end of the drive rod 4.2 compresses the third elastic element 4.6 and makes The unidirectional raised structure 4.2.2 at this end is removed from the card slot of the telescopic member 4.3 and protrudes from the front side of the telescopic member 4.3.
  • the protruding one-way convex structure 4.2.2 can be engaged with the card slot of the push rod segments on both sides of the U-shaped push rod 4.5, and the movement of the push support base 2 is converted into a U-shaped push rod 4.5 relative to the support.
  • the U-shaped push rod 4.5 touches the second folding arm of the rotary switch 3.2, by applying a force to the second folding arm, the elastic force of the second elastic member 3.2 is overcome, and the first folding arm is driven. Get out of the hole 1.6.
  • the support leg is located in the space on the front side of the seat, so when the rotary switch 3.2 unlocks the restriction on the lower telescopic structural member 1.2, The telescopic structural member 1.2 will slide downward under the action of gravity, and at this time, the ratchet bar 6.2 does not restrict the ratchet assembly 6.1 in the direction in which the lower telescopic structural member 1.2 protrudes, so the lower telescopic structural member 1.2 can be directly connected to the vehicle. floor.
  • the lower telescopic structural member 1.2 After reaching the floor of the vehicle, the lower telescopic structural member 1.2 does not reversely retract under the unidirectional locking action of the ratchet strip 6.2 against the ratchet assembly 6.1. At this point, the support base has been installed and the child seat can be further installed.
  • the user When the user wishes to remove the support base, the user only needs to operate the one-way lock state release switch 5 on the foot 1.3 of the lower telescopic structural member 1.2 to release the restriction of the reverse retraction of the lower telescopic structural member 1.2. Therefore, the disassembly and storage of the support base are facilitated.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • General Health & Medical Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)

Abstract

一种儿童安全座椅支撑座，包括支撑底座(2)和支撑腿(1)，所述支撑底座(2)用于安装儿童安全座椅，所述支撑腿(1)连接在所述支撑底座(2)的前端，用于在车内地板和所述支撑底座(2)之间形成支撑作用，所述支撑腿(1)包括伸缩机构和单向锁止机构，所述单向锁止机构设置在所述伸缩机构中能够相对伸缩运动的部件之间，用于使所述伸缩机构单向伸长而不能反向缩回。该支撑座的伸缩机构伸长到适合位置后就能够反向自动锁紧，确保了车辆发生碰撞或者紧急刹车时支撑腿能够对儿童安全座椅形成良好的支撑作用，避免儿童安全座椅向前翻转而造成乘坐儿童的人身伤害。

Description

儿童安全座椅支撑座 技术领域
本发明涉及儿童安全座椅领域，尤其涉及一种儿童安全座椅支撑座。
背景技术
儿童安全座椅是一种通过将儿童束缚在安全座椅内来有效提高儿童乘车安全的座椅。在汽车碰撞或突然减速的情况下，该座椅可以减少对儿童的冲击力，并限制儿童的身体移动以减轻对他们的伤害。在目前已有的儿童安全座椅中，基于欧洲强制标准的ISOFIX接口的儿童安全座椅被广泛应用。
考虑到车辆座椅平面与车内地板之间存在高度差，仅凭ISOFIX接口的连接难以承受来自于汽车碰撞或突然减速的情况，因此已有很多的儿童安全座椅为了支撑更加稳定，在儿童安装座椅的支撑座的前端设置了支撑腿，以便与车内地板形成可靠支撑，进而提高儿童座椅的安全防护效果。
另一方面，考虑到儿童安全座椅本身占据了较大的空间，通常来说，当不需要使用儿童安全座椅时，使用者往往需要对其拆卸收合，而当需要使用儿童安全座椅时再行安装。因此，这又进一步要求支撑座自身能够收缩或折叠。使用者在安装现有的儿童座椅支撑座时，往往需要多步操作，包括将支撑座放到车辆座椅平面，再连接ISOFIX接口，然后再操作支撑腿上的伸缩按钮，使支撑腿伸出到合适长度，然后再松开伸缩按钮来锁紧支撑腿。整个安装过程比较繁琐，而且需要使用者有一定的使用经验。对于缺乏经验或者比较粗心的使用者来说，支撑腿可能会调整不到位，不能很好地抵紧地面，或者伸缩按钮未能正确的锁紧，使得支撑腿处于可伸缩状态，这都导致了一定的安全隐患。
发明内容
本发明的目的是提出一种儿童安全座椅支撑座，能够简化安装，并确保同时使用支撑腿和ISOFIX机构对安全座椅进行固定，进而消除使用者安装时的安全隐患，以达到好的防护效果。
为实现上述目的，本发明提供了一种儿童安全座椅支撑座，包括支撑底座和支撑腿，所述支撑底座用于安装儿童安全座椅，所述支撑腿连接在所述支撑底座的前端， 用于在车内地板和所述支撑底座之间形成支撑作用，其中，所述支撑腿包括伸缩机构和单向锁止机构，所述单向锁止机构设置在所述伸缩机构中能够相对伸缩运动的部件之间，用于使所述伸缩机构单向伸长而不能反向缩回。
进一步的，在所述支撑腿上还设有单向锁止状态解除开关，所述单向锁止状态解除开关与所述单向锁止机构连接，能够解除所述单向锁止机构对所述伸缩机构的单向锁止状态。
进一步的，所述单向锁止机构为单向棘齿锁止机构，包括：棘齿条和棘爪构件，所述单向锁止状态解除开关与所述棘爪构件连接，所述单向锁止状态解除开关处于常闭状态时，能够使所述棘爪构件抵靠所述棘齿条上，在所述单向锁止状态解除开关被外力触发而开启时，所述单向锁止状态解除开关能够带动所述棘爪构件离开抵靠所述棘齿条的位置，解除所述单向锁止机构对所述伸缩机构的单向锁止状态。
进一步的，所述伸缩机构包括上伸缩结构件和下伸缩结构件，所述上伸缩结构件转动连接在所述支撑底座的下底面上，所述棘齿条和棘爪构件之一设置在所述上伸缩结构件上，另一设置在所述下伸缩结构件上。
进一步的，所述上伸缩结构件为中空管件，所述下伸缩结构件套设在所述中空管件内，并能够相对于所述上伸缩结构件的直线方向滑动，所述棘齿条纵向设置在所述中空管件的内侧，所述棘爪构件设置在所述下伸缩结构件上，且能够相对于所述下伸缩结构件转动。
进一步的，所述下伸缩结构件的下端还设有底脚，所述单向锁止状态解除开关设置在所述底脚上，所述单向锁止状态解除开关通过连接件与所述棘爪构件连接。
进一步的，所述单向锁止机构还包括第一弹性元件，所述第一弹性元件能够使所述单向锁止状态解除开关维持在常闭状态，并在所述单向锁止状态解除开关被外力触发后，能够在释放所述单向锁止状态解除开关时使所述单向锁止状态解除开关恢复为常闭状态。
进一步的，所述下伸缩结构件为工字形横截面的对称管件，在所述对称管件的两侧设有工字形凹槽，所述棘齿条左右对称的设置在所述中空管件内侧与所述工字形凹槽对应的位置，所述棘爪构件通过转轴可转动的安装在所述工字形凹槽内。
进一步的，在所述支撑底座和所述支撑腿之间设有伸缩锁定机构，所述伸缩机构包括上伸缩结构件和下伸缩结构件，所述上伸缩结构件转动连接在所述支撑底座的下底面上，在所述伸缩锁定机构的锁定状态下，所述伸缩锁定机构能够锁定所述下伸缩 结构件，以使所述下伸缩结构件与所述上伸缩结构件不能相对滑动，在所述伸缩锁定机构的解锁状态下，所述伸缩锁定机构能够解除对所述下伸缩结构件的锁定作用，以使所述下伸缩结构件在重力作用下自动相对于所述上伸缩结构件向下滑动，直至支撑受力位置。
进一步的，在所述支撑底座上还设有ISOFIX连接件，所述ISOFIX连接件与所述伸缩锁定机构之间形成可操作性的连接，以便在所述ISOFIX连接件正确接入到车辆安装接口时，驱动所述伸缩锁定机构从常设的锁定状态切换为解锁状态。
进一步的，在所述支撑底座上还设有用于与儿童安全座椅连接，并支撑所述儿童安全座椅的连接支撑构件，所述连接支撑构件与所述伸缩锁定机构之间形成可操作性的连接，以便在所述儿童安全座椅正确安装在所述支撑底座上，并抵靠所述连接支撑构件时，驱动所述伸缩锁定机构从常设的锁定状态切换为解锁状态。
进一步的，所述伸缩锁定机构包括转动开关和第二弹性元件，所述转动开关与所述上伸缩结构件转动连接，所述第二弹性元件与所述转动开关连接，所述转动开关在所述第二弹性元件的弹力作用下维持常态为锁定状态，并在受到外力的作用下克服所述第二弹性元件的弹力作用而脱离锁定状态。
进一步的，所述支撑底座上还设有U形推杆和一对驱动杆，所述U形推杆的两侧推杆段上均设置有多个卡槽，所述U形推杆的底部推杆段在所述伸缩锁定机构的一侧，所述驱动杆的一端与所述ISOFIX连接件之间滑动连接，另一端设有凸起结构，能够与所述U形推杆的两侧推杆段的任一卡槽卡接，在所述ISOFIX连接件正确接入到车辆安装接口时，通过推动所述支撑底座能够使所述U形推杆顶向所述伸缩锁定机构，以推动所述伸缩锁定机构从常设的锁定状态切换为解锁状态。
进一步的，所述支撑底座上还设有ISOFIX伸缩件，所述ISOFIX伸缩件与所述ISOFIX连接件固定连接，并能够相对于所述支撑底座伸出或缩回，所述ISOFIX伸缩件上也设置有多个卡槽，在所述ISOFIX连接件未接入到车辆安装接口时，所述驱动杆的另一端的凸起结构能够与所述ISOFIX伸缩件的任一卡槽卡接，而当所述ISOFIX连接件正确接入到车辆安装接口时，通过推动所述支撑底座能够使所述驱动杆的凸起结构脱离所述ISOFIX伸缩件，而与所述U形推杆的两侧推杆段的卡槽卡接，从而驱动所述U形推杆向所述伸缩锁定机构运动。
进一步的，所述凸起结构为单向凸起结构，在所述支撑底座和所述驱动杆的另一端之间还设有第三弹性元件，在所述支撑底座不受推力时，所述单向凸起结构能够在 所述第三弹性元件的弹力作用下脱离所述U形推杆的两侧推杆段的卡槽。
进一步的，所述单向锁止机构为单向楔块锁止机构，包括：齿形槽和楔形块，所述楔形块具有与所述齿形槽对应的凸齿和楔形面，所述楔形块上连接有拉绳，所述单向锁止状态解除开关与所述拉绳连接，在所述单向锁止状态解除开关未被触发时，所述楔形块在重力作用下沿楔形面向下滑动，使得所述楔形块的凸齿嵌入所述齿形槽；在所述单向锁止状态解除开关被外力触发时，所述单向锁止状态解除开关通过所述拉绳来驱动所述楔形块沿楔形面向上滑动，使得所述楔形块的凸齿脱离所述齿形槽，解除所述单向锁止机构对所述伸缩机构的单向锁止状态。
进一步的，所述伸缩机构包括上伸缩结构件和下伸缩结构件，所述上伸缩结构件转动连接在所述支撑底座的下底面上，所述下伸缩结构件的上端设有与所述楔形块上的楔形面配合的楔形配合面，所述齿形槽纵向设置在所述上伸缩结构件的内侧，所述楔形块设于所述齿形槽和所述下伸缩结构件的楔形配合面之间。
进一步的，还包括导向管，所述导向管固定在所述下伸缩结构件上，所述拉绳穿过所述导向管引出到所述伸缩机构的外部，在所述上伸缩结构件上还设有与所述导向管配合的导向限位槽，通过所述导向管在所述导向限位槽内的滑动能够实现所述下伸缩结构件相对于上伸缩结构件的运动导向和极限位置限定。
进一步的，所述单向锁止机构包括沿所述下伸缩结构件的长度方向中心线对称的两个所述楔形块，两个所述楔形块各自引出的所述拉绳分别从所述导向管的两端引出，或者所述拉绳连接后从所述导向管的任一端引出。
基于上述技术方案，本发明中的支撑腿通过单向锁止机构来使伸缩机构单向伸长而不能反向缩回，这样就方便了使用者在进行安装时只需将伸缩机构往车内地板方向伸出或者利用支撑腿自身的重量自动伸长到车内地板，无需使用者自行调整支撑腿的伸缩机构的伸出长度，而且当伸缩机构伸长到适合位置后就能够反向自动锁紧，确保了车辆发生碰撞或者紧急刹车时支撑腿能够对儿童安全座椅形成良好的支撑作用，避免儿童安全座椅向前翻转而造成乘坐儿童的人身伤害,从而通过确保同时使用支撑腿和ISOFIX机构对安全座椅进行固定，消除了使用者安装时的安全隐患，达到了好的防护效果。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发 明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1为本发明儿童安全座椅支撑座的一实施例的安装结构示意图。
图2为本发明儿童安全座椅支撑座实施例的***示意图。
图3为本发明儿童安全座椅支撑座实施例中的支撑腿的剖面示意图。
图4、图5分别为本发明儿童安全座椅支撑座实施例中伸缩锁定机构处于锁定和解锁位置的示意图。
图6为本发明儿童安全座椅支撑座实施例中下伸缩结构件的结构示意图。
图7为本发明儿童安全座椅支撑座实施例中驱动杆的结构示意图。
图8、图9分别为本发明儿童安全座椅支撑座的另一实施例中的支撑腿的内部和侧面示意图。
具体实施方式
下面通过附图和实施例，对本发明的技术方案做进一步的详细描述。
如图1所示，为本发明儿童安全座椅支撑座的一实施例的安装结构示意图。在本实施例中，儿童安全座椅支撑座(后也简称支撑座)包括支撑底座2和支撑腿1。支撑底座2用于安装儿童安全座椅，支撑腿1连接在支撑底座2的前端(相当于安装状态下靠近车辆头部的一侧)，用于在车内地板和所述支撑底座2之间形成支撑作用。
为了更方便说明支撑底座2内部的结构，因此图1所示的支撑底座2未示出其上层用于支撑儿童安全座椅，并与儿童安全座椅连接的部分。参考图3所示的支撑腿剖面结构，支撑腿1包括伸缩机构和单向锁止机构。伸缩机构即为支撑腿1实现伸长或缩短的主体结构，通过伸缩机构的伸缩功能，可以实现儿童安全座椅支撑座的收合和安装。单向锁止机构设置在伸缩机构中能够相对伸缩运动的部件之间，用于使所述伸缩机构单向伸长而不能反向缩回。
这里所说的单向伸长是指当儿童安全座椅支撑座安装到车辆内的座位上并进行连接后，原本处于缩回状态的支撑腿1能够朝向车辆内地板的方向伸长，直至顶紧车内地板。这种单向伸长能够使得使用者的安装操作更加方便，使用者无需凭经验自行调整支撑腿的长度，而只需在安装时将伸缩机构往车内地板方向单方向拉出即可，或者利用支撑腿自身的重量自动伸长到车内地板。而不能反向缩回则是指限制支撑腿1不能向其伸长方向的反方向，即从地面指向儿童安全座椅支撑座的方向缩回。通过对 支撑腿的这种限制作用，可以使儿童安全座椅支撑座的支撑腿能够方便的进行安装和地面支撑。而在车辆发生碰撞事故或急刹时，被限制不能缩回的支撑腿则又能够确保其对支撑底座形成良好的支撑作用，降低对乘坐儿童的人身伤害。这样，就通过确保同时使用支撑腿和ISOFIX机构对安全座椅进行固定而消除了使用者安装时的安全隐患，从而达到了好的防护效果。
如图2所示，伸缩机构的单向锁止可以通过支撑腿1上进一步设置的单向锁止状态解除开关5来解除。在图3中，单向锁止状态解除开关5与单向锁止机构连接，能够解除所述单向锁止机构对所述伸缩机构的单向锁止作用。单向锁止状态解除开关5可以为按钮形态或者提把手形态等，使用者通过对该开关的操作就能够方便的实现支撑腿1的伸缩机构的收合，从而进一步实现支撑座在车辆座椅上的拆卸。
图3示出了一种单向锁止机构的结构实例，该单向锁止机构为常闭的单向棘齿锁止机构6，该机构包括棘齿条6.2和棘爪构件6.1，单向锁止状态解除开关5与棘爪构件6.1连接。单向锁止状态解除开关5处于常闭状态时，能够使棘爪构件6.1抵靠所述棘齿条6.2上，以便棘爪构件6.1能够有效地阻挡棘齿条6.2在伸缩机构的缩回方向上的运动，而此时棘爪构件6.1对伸缩机构的伸出方向并不阻碍。而在单向锁止状态解除开关5被外力触发(例如用户用手指或手掌按动单向锁止状态解除开关5)而开启时，单向锁止状态解除开关5能够带动棘爪构件6.1离开抵靠棘齿条6.2的位置，解除单向锁止机构对所述伸缩机构的单向锁止作用，此时棘齿条6.2在伸缩机构的伸出和缩回方向均能够***，从而使得伸缩机构能够自由伸缩。
图3中，伸缩机构可具体包括上伸缩结构件1.1和下伸缩结构件1.2。上伸缩结构件1.1转动连接在支撑底座2的下底面上，棘齿条6.2设置在上伸缩结构件1.1上，棘爪构件6.1设置在下伸缩结构件1.2上。在另一个实施例中，棘齿条6.2也可以设置在下伸缩结构件1.2上，相应的，棘爪构件6.1设置在上伸缩结构件1.1上。这样就通过棘齿条6.2和棘爪构件6.1之间的单向锁止作用来实现下伸缩结构件1.2相对于上伸缩结构件1.1的单向伸出和反向缩回锁止。
在形式上，上伸缩结构件1.1可采用中空管件的形式，而下伸缩结构件1.2套设在中空管件内，并且下伸缩结构件1.2能够相对于上伸缩结构件1.1的直线方向滑动。棘齿条6.2可以纵向设置在中空管件的内侧，所述棘爪构件6.1设置在所述下伸缩结构件1.2上，且能够相对于所述下伸缩结构件1.2转动。当棘爪构件6.1转动在不同位置时，棘爪构件6.1或者对棘齿条6.2无限制，或者形成对棘齿条6.2的锁止作用。 结合图6所示的下伸缩结构件的实例，下伸缩结构件1.2优选为工字形横截面的对称管件，在对称管件的两侧设有工字形凹槽1.7，棘齿条6.2左右对称的设置在中空管件内侧与工字形凹槽1.7对应的位置，而棘爪构件6.1通过转轴可转动的安装在工字形凹槽1.7内。这种工字形凹槽在控制整体横向宽度的同时给单向锁止机构提供了容置空间，使得支撑腿整体更加紧凑，采用的中空结构形式也能够降低支撑腿的整体重量，节省材料。
为了使下伸缩结构件1.2能够与车内地板形成良好的支撑，优选在下伸缩结构件1.2的下端设置底脚1.3，而底脚1.3上可以设置单向锁止状态解除开关5，使用者可以通过按动底脚1.3上的单向锁止状态解除开关5执行单向锁止状态解锁操作，从而实现支撑腿1的收合。参考图3，单向锁止状态解除开关5通过连接件1.4与棘爪构件6.1连接，连接件1.4的形式可以为硬质杆或者钢丝绳，当单向锁止状态解除开关5以一种突起的按钮形式被使用者施力按下时，单向锁止状态解除开关5能够带动连接件1.4向下运动，而这种向下的运动会传递到上侧的棘爪构件6.1，驱动棘爪构件6.1运动到不限制棘齿条6.2的位置。图3中连接件1.4的运动能够带动棘爪构件6.1转动，以使得棘爪构件6.1的棘爪上翘，离开棘齿条6.2的齿间。
对于硬质杆形式的连接件1.4，其与棘齿构件6.1可通过长槽和滑动杆的配合方式进行连接，以免连接件1.4摆动幅度过大而干涉其他部件的运动。上述单向锁止机构可以包括多个，例如两个，并且相对于下伸缩结构件或上伸缩结构件的长度方向中心线对称，以使伸缩机构获得更均衡的运动效果，避免单侧偏磨造成的磨损和运动受限。
图3中的，底脚1.3内还可以进一步设置第一弹性元件1.5，作为单向锁止机构的一部分，第一弹性元件1.5能够使单向锁止状态解除开关5维持在常闭状态，并在所述单向锁止状态解除开关5被外力触发后，能够在释放所述单向锁止状态解除开关5时使所述单向锁止状态解除开关5恢复为常闭状态。
单向锁止机构除了上述的单向棘齿锁止机构之外，还可以采用其他已有的单向锁止机构，例如采用单向摩擦片进行单向锁止的机构等。图8-图9还示出了另一种可行的单向锁止机构，该单向锁止机构为单向楔块锁止机构7，包括：齿形槽7.1和楔形块7.2，所述楔形块7.2具有与所述齿形槽7.1对应的凸齿7.3和楔形面，所述楔形块7.2上连接有拉绳7.4和拉绳7.5，所述单向锁止状态解除开关5与拉绳7.4和拉绳7.5连接。单向锁止状态解除开关5可以是另外的按钮或提手，也可以是拉绳7.4 和拉绳7.5的绳头。
在所述单向锁止状态解除开关5未被触发时，所述楔形块7.2在重力作用下沿楔形面向下滑动，使得所述楔形块7.2的凸齿7.3嵌入所述齿形槽7.1。在所述单向锁止状态解除开关5被外力触发时，所述单向锁止状态解除开关5通过所述拉绳7.4，7.5来驱动所述楔形块7.2沿楔形面向上滑动，使得所述楔形块7.2的凸齿7.3脱离所述齿形槽7.1，解除所述单向锁止机构对所述伸缩机构的单向锁止状态。
在该实施例中，伸缩机构可以具体包括上伸缩结构件1.1和下伸缩结构件1.2，所述上伸缩结构件1.1转动连接在所述支撑底座2的下底面上，所述下伸缩结构件1.2的上端设有与所述楔形块7.2上的楔形面配合的楔形配合面，所述齿形槽7.1纵向设置在所述上伸缩结构件1.1的内侧，所述楔形块7.2设于所述齿形槽7.1和所述下伸缩结构件1.2的楔形配合面之间。参见图8所示，上伸缩结构件1.1可设置为具有中空内腔，下伸缩结构件1.2设于中空内腔中，并能够相对于上伸缩结构件1.1在上伸缩结构件1.1的长度方向上运动。下伸缩结构件1.2的上端可以设置成梯形，以形成楔形配合面。
考虑到下伸缩结构件1.2相对于上伸缩结构件1.1的运动更稳定，儿童安全座椅支撑座还包括导向管7.6，所述导向管7.6固定在所述下伸缩结构件1.2上，所述拉绳7.4，7.5穿过所述导向管7.6引出到所述伸缩机构的外部，在所述上伸缩结构件1.1上还设有与所述导向管7.6配合的导向限位槽7.7，通过所述导向管7.6在所述导向限位槽7.7内的滑动能够实现所述下伸缩结构件1.2相对于上伸缩结构件1.1的运动导向和极限位置限定。
为了使上下伸缩结构件运动更加稳定，单向锁止机构可以包括沿所述下伸缩结构件1.2的长度方向中心线对称的两个所述楔形块7.2。为了方便操作两个楔形块7.2来执行解锁操作，两个所述楔形块7.2各自引出的所述拉绳7.4，7.5可以分别从所述导向管7.6的两端引出，以便使用者通过同时拉动拉绳7.4和拉绳7.5来实现单向锁止状态的解锁。在另一个实施例中，也可以先将拉绳7.4和拉绳7.5连接，然后从导向管7.6的任一端引出，这样使用者只需要在一侧拉动即可完成解锁。
除了前述的单向锁止机构之外，本发明在另一个实施例中还给出了伸缩锁定的相关功能和结构，即在支撑底座2和所述支撑腿1之间设置伸缩锁定机构3，伸缩机构包括上伸缩结构件1.1和下伸缩结构件1.2，所述上伸缩结构件1.1转动连接在所述支撑底座2的下底面上。在伸缩锁定机构3的锁定状态下，伸缩锁定机构3能够锁定 所述下伸缩结构件1.2，以使所述下伸缩结构件1.2与所述上伸缩结构件1.1不能相对滑动。在所述伸缩锁定机构3的解锁状态下，所述伸缩锁定机构3能够解除对所述下伸缩结构件1.2的锁定作用，以使所述下伸缩结构件1.2在重力作用下自动相对于所述上伸缩结构件1.1向下滑动，直至支撑受力位置。下伸缩结构件1.2也可以在使用者的施力作用下相对于上伸缩结构件1.1中伸出。
这种伸缩锁定机构方便了使用者在安装时的操作，当支撑座尚未安装时，通过伸缩锁定机构的锁定状态来限制支撑腿处于收缩的较短长度，此时便于收纳和运动，而当使用者开始安装支撑座时，只需将伸缩锁定机构设置到解锁状态，则下伸缩结构件就可以在重力的作用下自动向下滑动到达支撑受力位置，而前面已提到单向锁止机构的实现功能及原理，当下伸缩结构件在重力的作用下自动向下滑动时不会被单向锁止机构所限制；而当下伸缩结构件到达支撑受力位置后，其会被单向锁止机构限制而不能反向缩回，从而获得了对车内地板的有效而稳定的支撑作用。
在支撑底座2上还设有ISOFIX连接件4.1，ISOFIX连接件4.1可位于支撑底座2的后端(相当于安装状态下靠近车辆尾部的一侧)，在一个实施例中，ISOFIX连接件4.1可以与所述伸缩锁定机构3之间形成可操作性的连接，以便在所述ISOFIX连接件4.1正确接入到车辆安装接口时，驱动所述伸缩锁定机构3从常设的锁定状态切换为解锁状态。
伸缩锁定机构3的一个结构实例参见图4和图5，该伸缩锁定机构3包括转动开关3.1和第二弹性元件3.2，所述转动开关3.1与所述上伸缩结构件1.1转动连接，所述第二弹性元件3.2与所述转动开关3.1连接，所述转动开关3.1在所述第二弹性元件3.2的弹力作用下维持常态为锁定状态，并在受到外力的作用下克服所述第二弹性元件3.2的弹力作用而脱离锁定状态。为了方便转动开关3.1和第二弹性元件3.2的安装，可以在上伸缩结构件1.1固定设置有支杆3.3，所述转动开关3.1可转动的设置在支杆3.3上，第二弹性开关3.1可选择扭簧，并设置在支杆3.3和转动开关3.1之间。转动开关3.1的一种结构形式如图4所示，该转动开关为L型，包括两根基本相对垂直的折臂，其第一个折臂用于与下伸缩结构件1.2上的孔1.6进行插接配合，以限制下伸缩结构件1.2的下落，第二个折臂向上凸起，能够在其他构件的推动下带动第一个折臂离开孔1.6，从而解除对下伸缩结构件1.2的限制。在本发明中，转动开关3.1不限于L型结构，也可以是能够通过转动来实现下伸缩结构件1.2相对于上伸缩结构件1.1的伸缩锁定和解锁的其他结构。
为了在ISOFIX连接件4.1的接入动作能够与伸缩锁定机构的解锁过程之间建立联系，参考图1和图2，优选在支撑底座2上进一步设置U形推杆4.5和一对驱动杆4.2，所述U形推杆4.5的两侧推杆段上均设置有多个卡槽(包括底部不通的浅槽或者底部透空的通孔)，所述U形推杆4.5的底部推杆段在所述伸缩锁定机构3的一侧。
图7示出了驱动杆4.2的一种实现结构。该驱动杆4.2的一端4.2.1与所述ISOFIX连接件4.1之间滑动连接，另一端设有凸起结构，能够与所述U形推杆4.5的两侧推杆段的任一卡槽卡接，在所述ISOFIX连接件4.1正确接入到车辆安装接口时，通过推动所述支撑底座2能够使所述U形推杆4.5顶向所述伸缩锁定机构3(例如顶向转动开关3.1的第二个折臂，以带动第一个折臂脱离孔1.6)，以推动所述伸缩锁定机构3从常设的锁定状态切换为解锁状态。
进一步的，可以在支撑底座2上设置ISOFIX伸缩件4.3，所述ISOFIX伸缩件4.3与所述ISOFIX连接件4.1可通过销或螺栓等连接件固定连接，并能够相对于所述支撑底座2伸出或缩回。所述ISOFIX伸缩件4.3上也设置有多个卡槽(包括底部不通的浅槽或者底部透空的通孔)。
在所述ISOFIX连接件4.1未接入到车辆安装接口时，所述驱动杆4.2的另一端的凸起结构能够与所述ISOFIX伸缩件4.3的任一卡槽卡接，而当所述ISOFIX连接件4.1正确接入到车辆安装接口时，通过推动所述支撑底座2能够使所述驱动杆4.2的凸起结构脱离所述ISOFIX伸缩件4.3，而与所述U形推杆4.5的两侧推杆段的卡槽卡接，从而驱动所述U形推杆4.5向所述伸缩锁定机构3运动。
凸起结构为单向凸起结构4.2.2，在所述支撑底座2和所述驱动杆4.2的另一端之间还设有第三弹性元件4.6，在所述支撑底座2不受推力时，所述单向凸起结构4.2.2能够在所述第三弹性元件4.6的弹力作用下脱离所述U形推杆4.5的两侧推杆段的卡槽。
除了通过ISOFIX连接件的接入来实现伸缩锁定机构解锁的方案之外，本发明还提供了另一种实现方式。即在所述支撑底座2上还设有用于与儿童安全座椅连接，并支撑所述儿童安全座椅的连接支撑构件，连接支撑构件可以与所述伸缩锁定机构3之间形成可操作性的连接，以便在所述儿童安全座椅正确安装在所述支撑底座2上，并抵靠所述连接支撑构件时，驱动所述伸缩锁定机构3从常设的锁定状态切换为解锁状态。
基于图2-图5所示的本发明儿童安全座椅支撑座的实例，下面对该实例的安装、 使用和拆卸进行一个整体的说明。
在支撑座的存放状态或者未使用状态下，下伸缩结构件1.2相对于上伸缩结构件1.1处于缩回状态，此时支撑腿1长度是最短的，便于收纳。而伸缩锁定机构3的转动开关3.2插设在下伸缩结构件1.2上的孔1.6中，避免下伸缩结构件1.2因放置角度或者振动等原因而从上伸缩结构件1.1中伸出。
当使用者需要安装儿童安全座椅时或者需要预备性的先安装儿童安全座椅安装座时，使用者可以将支撑底座放置在车辆座椅平面上，并相对于支撑底座2向后拉出ISOFIX连接件4.1，并将ISOFIX连接件4.1与车辆座椅上的ISOFIX接口进行连接。在连接完毕后，使用者向后推动支撑底座2，当驱动杆4.2的一端4.2.1抵顶住ISOFIX连接件4.1时，驱动杆4.2上的另一端则会压缩第三弹性元件4.6，并且使位于该端的单向凸起结构4.2.2从伸缩件4.3的卡槽中脱出，并从伸缩件4.3的前侧伸出。伸出的单向凸起结构4.2.2可以与U形推杆4.5的两侧推杆段的卡槽卡接，此时推动支撑底座2的运动就会转换成U形推杆4.5相对于支撑底座2的向前运动。而当U形推杆4.5触碰到转动开关3.2的第二个折臂时，通过给第二个折臂施加力的作用，从而克服第二弹性元件3.2的弹力，而带动第一个折臂脱离孔1.6。
此时，由于支撑座的支撑底座2被放置在车辆座椅平面上时，支撑腿则位于座椅前侧的空间中，因此当转动开关3.2解锁了对下伸缩结构件1.2的限制时，下伸缩结构件1.2就会在重力的作用下向下滑落，而此时棘齿条6.2在下伸缩结构件1.2伸出的方向不会对棘轮组件6.1进行限制，因此下伸缩结构件1.2可以直达车内地板。而到达车内地板后，在棘齿条6.2对棘轮组件6.1的单向锁止作用下，下伸缩结构件1.2不会反向缩回。此时，支撑座已被安装完毕，可以进一步安装儿童座椅。
当使用者希望卸下支撑座时，使用者只需操作下伸缩结构件1.2的底脚1.3上的单向锁止状态解除开关5，就可以解除下伸缩结构件1.2的反向缩回的限制，从而方便的进行支撑座的拆卸和收纳。
最后应当说明的是:以上实施例仅用以说明本发明的技术方案而非对其限制；尽管参照较佳实施例对本发明进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本发明的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本发明技术方案的精神，其均应涵盖在本发明请求保护的技术方案范围当中。

Claims (19)

  1. 一种儿童安全座椅支撑座，包括支撑底座(2)和支撑腿(1)，所述支撑底座(2)用于安装儿童安全座椅，所述支撑腿(1)连接在所述支撑底座(2)的前端，用于在车内地板和所述支撑底座(2)之间形成支撑作用，其特征在于，所述支撑腿(1)包括伸缩机构和单向锁止机构，所述单向锁止机构设置在所述伸缩机构中能够相对伸缩运动的部件之间，用于使所述伸缩机构单向伸长而不能反向缩回。
  2. 根据权利要求1所述的儿童安全座椅支撑座，其特征在于，在所述支撑腿(1)上还设有单向锁止状态解除开关(5)，所述单向锁止状态解除开关(5)与所述单向锁止机构连接，能够解除所述单向锁止机构(6，7)对所述伸缩机构的单向锁止状态。
  3. 根据权利要求2所述的儿童安全座椅支撑座，其特征在于，所述单向锁止机构为单向棘齿锁止机构(6)，包括：棘齿条(6.2)和棘爪构件(6.1)，所述单向锁止状态解除开关(5)与所述棘爪构件(6.1)连接，所述单向锁止状态解除开关(5)处于常闭状态时，能够使所述棘爪构件(6.1)抵靠所述棘齿条(6.2)上，在所述单向锁止状态解除开关(5)被外力触发而开启时，所述单向锁止状态解除开关(5)能够带动所述棘爪构件(6.1)离开抵靠所述棘齿条(6.2)的位置，解除所述单向锁止机构对所述伸缩机构的单向锁止状态。
  4. 根据权利要求3所述的儿童安全座椅支撑座，其特征在于，所述伸缩机构包括上伸缩结构件(1.1)和下伸缩结构件(1.2)，所述上伸缩结构件(1.1)转动连接在所述支撑底座(2)的下底面上，所述棘齿条(6.2)和棘爪构件(6.1)之一设置在所述上伸缩结构件(1.1)上，另一设置在所述下伸缩结构件(1.2)上。
  5. 根据权利要求4所述的儿童安全座椅支撑座，其特征在于，所述上伸缩结构件(1.1)为中空管件，所述下伸缩结构件(1.2)套设在所述中空管件内，并能够相对于所述上伸缩结构件(1.1)的直线方向滑动，所述棘齿条(6.2)纵向设置在所述中空管件的内侧，所述棘爪构件(6.1)设置在所述下伸缩结构件(1.2)上，且能够相对于所述下伸缩结构件(1.2)转动。
  6. 根据权利要求4所述的儿童安全座椅支撑座，其特征在于，所述下伸缩结构件(1.2)的下端还设有底脚(1.3)，所述单向锁止状态解除开关(5)设置在所述底脚(1.3)上，所述单向锁止状态解除开关(5)通过连接件(1.4)与所述棘爪构件(6.1)连接。
  7. 根据权利要求2所述的儿童安全座椅支撑座，其特征在于，所述单向锁止机构还包括第一弹性元件(1.5)，所述第一弹性元件(1.5)能够使所述单向锁止状态解除开关(5)维持在常闭状态，并在所述单向锁止状态解除开关(5)被外力触发后，能够在释放所述单向锁止状态解除开关(5)时使所述单向锁止状态解除开关(5)恢复为常闭状态。
  8. 根据权利要求5所述的儿童安全座椅支撑座，其特征在于，所述下伸缩结构件(1.2)为工字形横截面的对称管件，在所述对称管件的两侧设有工字形凹槽(1.7)，所述棘齿条(6.2)左右对称的设置在所述中空管件内侧与所述工字形凹槽(1.7)对应的位置，所述棘爪构件(6.1)通过转轴可转动的安装在所述工字形凹槽(1.7)内。
  9. 根据权利要求1所述的儿童安全座椅支撑座，其特征在于，在所述支撑底座(2)和所述支撑腿(1)之间设有伸缩锁定机构(3)，所述伸缩机构包括上伸缩结构件(1.1)和下伸缩结构件(1.2)，所述上伸缩结构件(1.1)转动连接在所述支撑底座(2)的下底面上，在所述伸缩锁定机构(3)的锁定状态下，所述伸缩锁定机构(3)能够锁定所述下伸缩结构件(1.2)，以使所述下伸缩结构件(1.2)与所述上伸缩结构件(1.1)不能相对滑动，在所述伸缩锁定机构(3)的解锁状态下，所述伸缩锁定机构(3)能够解除对所述下伸缩结构件(1.2)的锁定作用，以使所述下伸缩结构件(1.2)在重力作用下自动相对于所述上伸缩结构件(1.1)向下滑动，直至支撑受力位置。
  10. 根据权利要求9所述的儿童安全座椅支撑座，其特征在于，在所述支撑底座(2)上还设有ISOFIX连接件(4.1)，所述ISOFIX连接件(4.1)与所述伸缩锁定机构(3)之间形成可操作性的连接，以便在所述ISOFIX连接件(4.1)正确接入到车辆安装接口时，驱动所述伸缩锁定机构(3)从常设的锁定状态切换为解锁状态。
  11. 根据权利要求9所述的儿童安全座椅支撑座，其特征在于，在所述支撑底座(2)上还设有用于与儿童安全座椅连接，并支撑所述儿童安全座椅的连接支撑构件，所述连接支撑构件与所述伸缩锁定机构(3)之间形成可操作性的连接，以便在所述儿童安全座椅正确安装在所述支撑底座(2)上，并抵靠所述连接支撑构件时，驱动所述伸缩锁定机构(3)从常设的锁定状态切换为解锁状态。
  12. 根据权利要求9所述的儿童安全座椅支撑座，其特征在于，所述伸缩锁定机构(3)包括转动开关(3.1)和第二弹性元件(3.2)，所述转动开关(3.1)与所述上伸缩结构件(1.1)转动连接，所述第二弹性元件(3.2)与所述转动开关(3.1)连接，所述转动开关(3.1)在所述第二弹性元件(3.2)的弹力作用下维持常态为锁定状态， 并在受到外力的作用下克服所述第二弹性元件(3.2)的弹力作用而脱离锁定状态。
  13. 根据权利要求10所述的儿童安全座椅支撑座，其特征在于，所述支撑底座(2)上还设有U形推杆(4.5)和一对驱动杆(4.2)，所述U形推杆(4.5)的两侧推杆段上均设置有多个卡槽，所述U形推杆(4.5)的底部推杆段在所述伸缩锁定机构(3)的一侧，所述驱动杆(4.2)的一端与所述ISOFIX连接件(4.1)之间滑动连接，另一端设有凸起结构，能够与所述U形推杆(4.5)的两侧推杆段的任一卡槽卡接，在所述ISOFIX连接件(4.1)正确接入到车辆安装接口时，通过推动所述支撑底座(2)能够使所述U形推杆(4.5)顶向所述伸缩锁定机构(3)，以推动所述伸缩锁定机构(3)从常设的锁定状态切换为解锁状态。
  14. 根据权利要求13所述的儿童安全座椅支撑座，其特征在于，所述支撑底座(2)上还设有ISOFIX伸缩件(4.3)，所述ISOFIX伸缩件(4.3)与所述ISOFIX连接件(4.1)固定连接，并能够相对于所述支撑底座(2)伸出或缩回，所述ISOFIX伸缩件(4.3)上也设置有多个卡槽，在所述ISOFIX连接件(4.1)未接入到车辆安装接口时，所述驱动杆(4.2)的另一端的凸起结构能够与所述ISOFIX伸缩件(4.3)的任一卡槽卡接，而当所述ISOFIX连接件(4.1)正确接入到车辆安装接口时，通过推动所述支撑底座(2)能够使所述驱动杆(4.2)的凸起结构脱离所述ISOFIX伸缩件(4.3)，而与所述U形推杆(4.5)的两侧推杆段的卡槽卡接，从而驱动所述U形推杆(4.5)向所述伸缩锁定机构(3)运动。
  15. 根据权利要求14所述的儿童安全座椅支撑座，其特征在于，所述凸起结构为单向凸起结构(4.2.2)，在所述支撑底座(2)和所述驱动杆(4.2)的另一端之间还设有第三弹性元件(4.6)，在所述支撑底座(2)不受推力时，所述单向凸起结构(4.2.2)能够在所述第三弹性元件(4.6)的弹力作用下脱离所述U形推杆(4.5)的两侧推杆段的卡槽。
  16. 根据权利要求2所述的儿童安全座椅支撑座，其特征在于，所述单向锁止机构为单向楔块锁止机构(7)，包括：齿形槽(7.1)和楔形块(7.2)，所述楔形块(7.2)具有与所述齿形槽(7.1)对应的凸齿(7.3)和楔形面，所述楔形块(7.2)上连接有拉绳(7.4，7.5)，所述单向锁止状态解除开关(5)与所述拉绳(7.4，7.5)连接，在所述单向锁止状态解除开关(5)未被触发时，所述楔形块(7.2)在重力作用下沿楔形面向下滑动，使得所述楔形块(7.2)的凸齿(7.3)嵌入所述齿形槽(7.1)；在所述单向锁止状态解除开关(5)被外力触发时，所述单向锁止状态解除开关(5)通 过所述拉绳(7.4，7.5)来驱动所述楔形块(7.2)沿楔形面向上滑动，使得所述楔形块(7.2)的凸齿(7.3)脱离所述齿形槽(7.1)，解除所述单向锁止机构对所述伸缩机构的单向锁止状态。
  17. 根据权利要求16所述的儿童安全座椅支撑座，其特征在于，所述伸缩机构包括上伸缩结构件(1.1)和下伸缩结构件(1.2)，所述上伸缩结构件(1.1)转动连接在所述支撑底座(2)的下底面上，所述下伸缩结构件(1.2)的上端设有与所述楔形块(7.2)上的楔形面配合的楔形配合面，所述齿形槽(7.1)纵向设置在所述上伸缩结构件(1.1)的内侧，所述楔形块(7.2)设于所述齿形槽(7.1)和所述下伸缩结构件(1.2)的楔形配合面之间。
  18. 根据权利要求17所述的儿童安全座椅支撑座，其特征在于，还包括导向管(7.6)，所述导向管(7.6)固定在所述下伸缩结构件(1.2)上，所述拉绳(7.4，7.5)穿过所述导向管(7.6)引出到所述伸缩机构的外部，在所述上伸缩结构件(1.1)上还设有与所述导向管(7.6)配合的导向限位槽(7.7)，通过所述导向管(7.6)在所述导向限位槽(7.7)内的滑动能够实现所述下伸缩结构件(1.2)相对于上伸缩结构件(1.1)的运动导向和极限位置限定。
  19. 根据权利要求18所述的儿童安全座椅支撑座，其特征在于，所述单向锁止机构包括沿所述下伸缩结构件(1.2)的长度方向中心线对称的两个所述楔形块(7.2)，两个所述楔形块(7.2)各自引出的所述拉绳(7.4，7.5)分别从所述导向管(7.6)的两端引出，或者所述拉绳(7.4，7.5)连接后从所述导向管(7.6)的任一端引出。
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