NO20211176A1 - Child safety seat with seat belt tensioner device - Google Patents

Child safety seat with seat belt tensioner device Download PDF

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Publication number
NO20211176A1
NO20211176A1 NO20211176A NO20211176A NO20211176A1 NO 20211176 A1 NO20211176 A1 NO 20211176A1 NO 20211176 A NO20211176 A NO 20211176A NO 20211176 A NO20211176 A NO 20211176A NO 20211176 A1 NO20211176 A1 NO 20211176A1
Authority
NO
Norway
Prior art keywords
seat
child safety
assembly
seat belt
safety seat
Prior art date
Application number
NO20211176A
Inventor
Okke Van Mourik
Hans Gutter
Christian Van Essen
Hugo Westra
Original Assignee
Torgersen Hans & Soenn
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Torgersen Hans & Soenn filed Critical Torgersen Hans & Soenn
Priority to NO20211176A priority Critical patent/NO20211176A1/en
Priority to PCT/EP2022/077395 priority patent/WO2023052633A1/en
Publication of NO20211176A1 publication Critical patent/NO20211176A1/en

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Classifications

    • 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
    • B60N2/2803—Adaptations for seat belts
    • B60N2/2806—Adaptations for seat belts for securing the child seat to the vehicle
    • 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
    • B60N2/2803—Adaptations for seat belts
    • B60N2/2818—Adaptations for seat belts characterised by guiding means for children belts
    • 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
    • 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
    • B60N2/2857—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle characterised by the peculiar orientation of the child
    • B60N2/286—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle characterised by the peculiar orientation of the child forward facing
    • 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
    • B60N2/2803—Adaptations for seat belts
    • B60N2002/2815—Adaptations for seat belts with additional belt accessories, e.g. a belt tension detector

Landscapes

  • 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)
  • Emergency Lowering Means (AREA)

Description

Child safety seat with seat belt tensioner device
The present invention generally relates to the field of child safety seats, and more particularly, to a child safety seats including a tensioning mechanism for applying tension to a seat belt mounted in a vehicle, where the tensioning mechanism of the child safety seat will move the seat belt from an initial position to a tensioning position, in which the seat belt is tensioned relative to the initial position, resulting in a stable installation of the child safety seat.
All child safety seats on the market today are designed to protect children in vehicles from the effects of impacts or other sudden changes in motion (for instance sudden deceleration), and the child safety seats may be used in a large number of vehicles with a variety of seating orientations and designs. For example, it is recommended for the youngest children to use rear-facing child safety seats for additional safety, while forward-facing child safety seats may be used when the child reaches an appropriate size and/or age. It is important for a child to be properly secured to the vehicle seat to protect the child, particularly during an impact with the vehicle.
A child safety seat generally comprises a rigid main body adapted to receive and securely hold a child or infant and a base for supporting the main body. The rigid main body of the child safety seat may be integrated with the base of the child safety seat, or the rigid main body of the child safety seat and the base of the child safety seat may be releasably connected with each other, so that the child safety seat may be used to transport the child from the vehicle and to another place, for instance home, store, etc., or also from another place to vehicle, while the child is in the child safety seat.
The rigid main body of the child safety seat usually includes a seat portion in which the child or infant sits (or lies), a backrest portion extending from the seat portion against which the child or infant rests and also a head portion. The rigid main body also typically includes some form of protective wings or walls raising vertically out from the rigid main body, such covering the upper body and head of the child or infant.
The forces acting on a child or infant sitting in a child safety seat during a crash of the vehicle carrying the child safety seat are influenced by the way the child safety seat is “connected” to the vehicle, i.e. by how the child safety seat is fixed to the vehicle seat on which the child safety seat is placed and installed on.
The child safety seat may, for instance, be fixed on a vehicle seat by employing a seat belt provided in the vehicle for fixing and securing the child safety seat.
Through this method, at least one of the seat belts of the vehicle is guided in a prescribed way around or through the child safety seat thus securing the child safety seat in the desired position and orientation. An advantage of this method is that it exclusively makes use of fastening means that are usually present in every vehicle, i.e. the seat belts of the vehicle. However, in some situations, securing the child safety seat through use of the seat belt may be awkward and difficult. Moreover, maintaining a proper amount of tension in the seat belt can also be difficult to achieve and/or to maintain. Indeed, an improper amount of tension is undesirable and may be negatively affect the safety of the child or infant secured within the child safety seat. It would be advantageous to have an easy-to-use and secure child safety seat that may be used in either a forward-facing or rear-facing configuration depending on the parents’ need.
EP 2.832.587 B1 relates to a child safety seat, where the child safety seat comprises a support adapted to rest on a seat of the vehicle, with which a child containment portion is associated, such support having a base resting on a cushion of the above mentioned seat and a backrest adapted to rest against a seat backrest, levercontrolled coupling and tensioning means being provided in said base for coupling and tensioning a seat belt of the car, to secure the child seat to said seat, the backrest of the support having hooking means for attachment of such belt. The coupling and tensioning means comprise a translating body having a wedge-shaped end, which is adapted to slide within a wedge cavity interposed between two opposed sliding portions of such base, said portions being movable transverse and perpendicular to the translating body when the wedge-shaped end of the latter penetrates the above mentioned wedge cavity, a part of the safety belt of the vehicle being placed between said cavity and said end, and being also associated with said sliding portions of the base, said belt being tensioned by insertion of said end into such cavity and by a movement of said portions away from each other, caused by such insertion.
US 6.779.842 B2 relates to a child safety seat with an integral seat belt tensioner for properly securing the seat to the passenger seat of an automotive vehicle by taking up the slack in the seat belt after it has been fastened through the child seat. The tensioner pulls or pushes the seat belt so that the few inches of slack that usually exist are eliminated by the tensioner. The safety seat is adapted to have internal space, either in its back and/or below the seat, to accommodate the tensioner and the belt movement so that the controls, tensioner, and/or other moving parts are out of the reach of the child in the seat. A preferred version of the tensioner includes motor and gearing to move a belt holder up and down generally along the rear of the safety seat, for tightening and loosening the belt, respectively.
EP 1.623.868 A1 relates to a child vehicle seat suitable for use in a vehicle, which child vehicle seat comprises a chassis and a seat connected to said chassis, which chassis is provided with belt guide means for guiding a belt fitted in the vehicle for fixing the child vehicle seat in position in the vehicle, as well as belt tensioning means for moving the belt from an initial position to a tensioning position, in which the belt is tensioned relative to the initial position. At least part of the belt can be moved in a substantially vertical direction, away from the chassis, from the initial position by the belt tensioning means.
There is thus a need for alternatives to today's child safety seats, or at least supplementary solutions for child safety seats.
An object according to the present invention is to remedy at least one of the abovementioned disadvantages or problems.
Another object according to the present invention is to provide a child safety seat in which the child safety seat can be installed in a vehicle in a simple and secure manner, also resulting in a stable installation of the child safety seat in the seat of the vehicle.
These objects are achieved according to the present invention with a child safety seat as defined in the independent claim 1. Further embodiments of the invention are defined in the dependent claims.
The present invention concerns a child safety seat for use on a seat of a vehicle, which child safety seat can be fastened to the seat of the vehicle by attachment means provided in the vehicle, for instance a safety seat belt such as a three-point safety belt existing in the vehicle, where the child safety seat comprises a seat belt tensioner device.
The present invention relates to a child safety seat for use in a vehicle, which child safety seat comprises a frame and a child seat connected to the frame, which frame is provided with belt guide means for guiding a seat belt fitted in the vehicle for fixing the child safety seat in position in the vehicle, where the child safety seat further comprises a seat belt tensioner device comprising means for moving the seat belt of the vehicle from an initial position to a tensioning position when the child safety seat is installed and fastened in the seat of the vehicle, in which the seat belt is tensioned relative to the initial position, in which tensioning position the seat belt tensioner device grips and holds both an inward section and a return section of the seat belt of the vehicle, thereby preventing a relative movement between the inward section and the return section of the seat belt.
As used in this application an inward section of the seat belt should be understood to be a horizontal portion of the seat belt, while a return section of the set belt should be understood to be a diagonal portion of the seat belt when the seat belt is used, in an ordinary way, to secure an occupant in the seat of the vehicle.
The child safety seat may comprise a rigid main body adapted to receive and hold the child or infant and a base for supporting the main body of the child safety seat. In one embodiment the rigid main body and the base of the child safety seat may be releasably connected to each other. However, it could also be envisaged that the rigid main body of the child safety seat could be integrated with the base for supporting the main body.
In one embodiment the seat belt tensioner device according to the present invention may comprise a lock-off assembly, a tensioner assembly, and a torque limiter assembly, where the assemblies are connected together in appropriate to form the belt tensioner device and where a turning knob furthermore is used to operate the seat belt tensioner device.
The torque limiter assembly may comprise a first annular element, where one end of the first annular element is provided with a plurality of teeth arranged around a circumference of the first annular element, and a second annular element, where one end of the second annular element is provided with a plurality of teeth around a circumference of the second annular element. The first and second annular elements are arranged in an outer tubular element in such a way that the ends of the first and second annular elements provided with the plurality of teeth are facing each other. A turning knob is furthermore connected to the outer tubular element.
The second annular element may be connected or fixed to the outer tubular element in such a way that the second annular element will not be able to move axially along the outer tubular element, only to rotate along with the outer tubular element when the turning knob is turned or rotated. The first annular element is arranged within the outer tubular element in such a way that the first annular element may be moved axially along the outer tubular element.
An elastic element may be arranged between the turning knob and the first annular element, where the elastic element is arranged to push the first annular element towards the second annular element in order to bring the plurality of teeth provided on the ends of the first and second annular elements into contact with each other.
The plurality of teeth provided around a circumference of the first and second annular elements may have a corresponding or cooperating form.
The elastic element may, for instance, be a spring or the like.
The purpose of the torque limiter assembly is to limit an input force (torque) by an user. When the torque limiter assembly is assembled, a user will turn the turning knob to provide a torque in order to operate the belt tensioner device. The elastic element arranged between the turning knob and the first annular element will maintain the plurality of teeth provided on the ends of the first and second annular elements into contact with each other until a resistance from a spindle of the tensioner assembly becomes larger than the input force from the user, whereby the first annular element in such a state is pushed backwards (i.e. towards the turning knob) and the teeth provided on the first and second annular elements are brought out of contact with each other. This results in that the turning knob may continue to turn, while the spindle will not.
A torque limit for the torque limiter assembly, i.e. the limit for when the first and second annular elements will be separated and the turning knob will “slip”, may be determined by choosing a spring stiffness, preloading of the spring and an angle at which the teeth are to be designed with.
The lock-off assembly of the seat belt tensioner device may in one embodiment comprise a rotating part, a stationary part, a first hinge element and a second hinge element and a transfer element that may transfer a rotation of spindle to the first and second hinge elements. The function of the lock-off assembly is to grip and lock an inward section and a return section of the seat belt, this preventing a rela tive movement between the inward section and return section of the seat belt when the lock-off assembly is brought to a closed and active state.
The spindle is connected to the first and second hinge elements via the transfer element, such that a rotation of the turning knob, and thereby the spindle, is transferred into a vertical movement of the transfer element. The movement of the transfer element will in turn result in a turning or rotating motion of the first and second hinge elements, the first and second hinge elements being connected to the rotating part of the lock-off assembly. Through this turning or rotating motion of the first and second hinge part, the rotating part is moved towards the stationary part of the lock-off device in order to lock the lock-off device.
According to one embodiment, the rotating part and the stationary part of the lockoff assembly may, on a side facing the opposite part, be provided with a friction material or the like, so as to prevent a movement of the inward section and the return section of the seat belt when the seat belt tensioner device is brought to a tensioning position.
The lock-off assembly will also through the above arrangement be brought away from the tensioner assembly, whereafter the lock-off assembly is locked.
In one embodiment the first and second hinge elements may be connected to each other through a bolt, pin or the like, whereby a rotation of one of the first and second hinge elements may be transferred to the other of the first and second hinge elements.
The tensioner assembly may in one embodiment comprise a spindle and two rotatable parts provided with a plurality of teeth.
The function of the tensioner assembly of the seat belt tensioner device is to extend the lock-off assembly out from the seat belt tensioner device and to keep the lockoff device in this position, to increase a path of the seat belt and to keep the seat belt in the tensioned state.
In one embodiment the tensioner assembly may comprise a spindle and two rotatable parts arranged within a housing, each of the rotatable parts being provided with a plurality of teeth. The two rotatable parts may be arranged to be rotatable around a bolt, pin or the like, such that the plurality of teeth of the rotatable parts may be brought in and out of contact with thread of the spindle.
According to one aspect, a spring may be arranged between the spindle and an outer tubular element, one end of the spring being connected to an end of the spindle and an opposite end of the spring being connected to the outer tubular element. An opposite end of the spindle to which the spring is connected to, may be connected to the lock-off assembly in appropriate ways.
The above arrangement will result in that, when the turning knob is rotated or turned, the rotation of the turning knob is transferred to the spindle, and the spindle is in turn moved in the axial direction of the tensioner assembly. The movement of the spindle in the axial direction will in turn result in that the lock-off assembly is moved away from the tensioner assembly in order to tension the seat belt of the vehicle, as a path of the seat belt is tensioned.
If the seat belt tensioner device is to be released or unlocked, such that the seat belt may be removed from the seat belt tensioner device, a user may press or push the turning knob towards the tensioner assembly. This will result in that one end of a sleeve being in contact with the outer tubular element, is pressed against a part of the rotatable parts in order to rotate these around the respective bolts. When the rotatable parts are rotated, the plurality of teeth will be brought out of contact with the thread of the spindle, thereby allowing the spindle to be returned to a starting or initial position through use of the spring.
The foregoing and other features of the present invention will become apparent to one skilled in the art to which the present invention relates upon consideration of the following description of the invention with reference to the accompanying drawings, wherein:
Figure 1 shows a child safety seat comprising a seat belt tensioner device according to the present invention installed in a vehicle sat of a vehicle, in a perspective view,
Figure 2 shows the seat belt tensioner device according to figure 1 in greater detail, Figures 3A-3B show a torque limiter assembly of the seat belt tensioner device, where figure 3A shows the torque limiter assembly in an active state and figure 3B shows the torque limiter assembly in an inactive state,
Figures 4A-4B show a tensioner assembly of the seat belt tensioner device, where figure 4A shows the tensioner assembly in an active state, and figure 4B shows the tensioner assembly in an inactive state, and
Figures 5A-5B show a lock-off assembly of the seat belt tensioner device, where figure 5A shows the lock-off assembly in an open and inactive state, and figure 5B shows the lock-off assembly in a closed and active state.
Figure 1 shows a child safety seat 1 comprising a seat belt tensioner device 4 according to the present invention during installation of the child safety seat 1 in a seat S of a vehicle (not shown), where it can be seen that the child safety seat 1 is arranged on the seat S of the vehicle, whereafter a seat belt SB of the vehicle in appropriate ways is guided around the child safety seat 1 and through a lock-off assembly 4A of the seat belt tensioner device 4.
When the seat belt SB of the vehicle is guided through the lock-off assembly 4A of the seat belt tensioner device 4, the lock-off assembly 4A must be in an open and inactive state. When the seat belt SB of the vehicle is arranged in the lock-off assembly 4A, the lock-off assembly 4A is brought to a locked and activated state, whereby the seat belt SB is brought from an initial position to a tensioning position, where the seat belt tensioner device 4 in the locked and active state, i.e. the tensioning position, will grip and hold both an inward section and a return section of the seat belt SB in this position, thereby also preventing a relative movement between the inward section and the return section of the seat belt SB.
Figure 2 shows the seat belt tensioner device 4 according to the present invention, where it can be seen that the seat belt tensioner device 4 comprises the lock-off assembly 4A, a tensioner assembly 4B and a torque limiter assembly 4C.
Figures 3A-3B show the torque limiter assembly 4C of the seat belt tensioner 4 according to the present invention in greater detail, where figure 3A shows the torque limiter assembly 4A in an active state and figure 3B shows the torque limiter assembly 4C in an inactive state.
The torque limiter assembly 4C comprises an outer tubular element 4C7, in which outer tubular element 4C7 a first annular element 4C1 and a second annular element 4C3 is arranged. One end of the first annular element 4C1 is provided with a plurality of teeth 4C2 around a periphery of the first annular element 4C1.
Similarly, one end of the second annular element 4C3 is also provided with a plurality of teeth 4C4 around a periphery of the second annular element 4C3. When the first and second annular elements 4C1, 4C3 are placed inside the outer tubular element 4C7, the first and second annular elements 4C1, 4C3 are arranged in such a way that the ends provided with the plurality of teeth 4C2, 4C4 will face each other.
The first annular element 4C1 is allowed to move axially along the outer tubular element 4C7, i.e. forwards and backwards within the outer tubular element 4C7, while the second annular element 4C3 is connected in appropriate ways to the outer tubular element 4C7, whereby the second annular element 4C3 will not be able to move axially along the outer tubular element 4C7, only to rotate along with the outer tubular housing 4C7.
Furthermore, an elastic element 4C5 is arranged between a turning knob 4C6 and the first annular element 4C1, where the elastic element 4C5 will push the first annular element 4C1 towards the second annular element 4C3, such that the plurality of teeth 4C2, 4C4 provided on the ends of the first and second annular elements 4C1, 4C3 are brought into contact with each other. One end of the elastic element 4C5 is supported inside the turning knob 4C6, while the opposite end of the elastic element 4C5 will abut against an end of the first annular element 4C1 not provided with the plurality of teeth 4C2.
When the plurality of teeth 4C2, 4C4 of the first and second annular elements 4C1, 4C3 are in contact with each other, a torque provided by the user by turning the turning knob 4C6, will be able to be transferred, through the first annular element 4C1, further to the second annular element 4C3 and thereafter to a spindle 4B1, where the spindle 4B1 is used to operate the lock-off assembly 4A from an open and inactive state (shown in figure 5A) and to a closed and active state (shown in figure 5B), in which closed and active state an inward section and a return section of the seat belt is arranged between a rotating part 4A1 and a stationary part 4A2 of the lock-off assembly 4A. Furthermore, in this closed and activated state of the lock-off assembly 4A, the inward section and the return section of the seat belt have been moved away from the seat of the vehicle on which the child safety seat 1 is placed on, whereby this movement of the inward section and the return section of the seat belt will tighten the seat belt in order to provide a stable installation of the child safety seat 1.
The turning knob 4C6 is, through the outer tubular element 4C7 and the second annular element 4C3, connected to a spindle 4B1. The spindle 4B1 comprises an end portion 4B10, where the end portion 4B10 is provided with two outwardly extending taps 4B11. The two outwardly extending taps 4B11 will be accommodated in longitudinal slots (not shown) provided on an inside of the outer tubular element 4C7. When the turning knob 4C6 is rotated, the rotation will be transferred to the outer tubular element 4C7 and the second annular element 4C3, and the rotation of the outer tubular element 4C7 and the second annular element 4C3 will in turn result in that the spindle 4B1 is rotated through the end portion 4B10 and the two outwardly taps 4B11 being in contact with the longitudinal slots provided on the inside of the outer tubular element 4C7.
When a resistance from the spindle 4B1 acting on the outer tubular element 4C7 and the second annular element 4C3 becomes larger than an input torque from a user turning the turning knob 4C6, the first annular element 4C1 is, through the elastic element 4C5, pushed backwards and moved towards the turning knob 4C6, where the movement of the first annular element 4C1 will result in that the plurality of teeth 4C2, 4C3 are brought out of contact with each other. Furthermore, such a state will result in that the turning knob 4C6 may continue to be turned or rotated, but this movement will not be “transferred” to the spindle 4B1.
Figures 4A-4B show a tensioner assembly 4B of the seat belt tensioner device 4, where figure 4A shows the tensioner assembly 4B in an active state, and figure 4B shows the tensioner assembly 4B in an inactive state.
The function of the tensioner assembly 4B of the seat belt tensioner device 4 is to extend the lock-off assembly 4A out from the seat belt tensioner device 4 and to keep the lock-off device 4A in this position, to increase a path of the seat belt and to keep the seat belt SB in the tensioned state.
The tensioner assembly 4B comprises a spindle 4B1 and two rotatable part 4B2 arranged within a housing H, where the rotatable parts 4B2 are provided with a plurality of teeth 4B3. The two rotatable parts 4B2 are furthermore arranged to be rotatable around a bolt 4B4, pin or the like, such that the rotatable parts 4B2 can be brought into contact with the thread of the spindle 4B1 through the plurality of teeth 4B3.
A spring 4B11 is arranged between the spindle 4B1 and the outer tubular element 4C7, where the spring 4B10 through one end is connected to an end of the spindle 4B1 and through the opposite end is connected to the outer tubular element 4C7 in appropriate ways. Furthermore, and opposite end of the spindle 4B1 is connected to the lock-off assembly 4A. When the turning knob 4C6 is turned, the rotation of the turning knob 4C6 is transferred to the spindle 4B1, and the spindle 4B1 is in turn moved in the axial direction of the tensioner assembly 4B in order to move the lockoff assembly 4A away from the tensioner assembly 4B (shown with the arrow pointing to the left on figure 4A). The movement of the lock-off assembly 4A away from the tensioner assembly 4B will result in that the seat belt SB is tensioned (the path of the seat belt is increased).
When the user push or press the turning knob 4C4 towards the tensioner assembly 4B, this will result in that one end of a sleeve 4B8 being in contact with the outer tubular element 4C7 is pressed against a part of the rotatable parts 4B2, whereby this “pushing” of the rotatable parts 4B2 will result in that the two rotatable parts 4B2 are rotated around the respective bolts 4B4, whereby the teeth 4B3 of the rotatable parts 4B2 are brought out of contact with the spindle 4B1, allowing the spindle 4B1 to be returned by the force of the spring 4B11 to a starting or initial position of the seat belt tensioner device 4 (shown with the arrow pointing to the right on figure 4B).
Figures 5A-5B show a lock-off assembly 4A of the seat belt tensioner device 4, where figure 5A shows the lock-off assembly 4A in an open and inactive state, and figure 5B shows the lock-off assembly 4B in a closed and active state.
The function of the lock-off assembly 4 is to grip and hold the inward section and a return section of the seat belt SB, thereby preventing a relative movement between the inward section and the return section of the seat belt SB.
The lock-off assembly 4A comprises a rotating part 4A1, a stationary part 4A2, a first and second hinge element 4A3, 4A4 and a transfer element 4A5 that will transfer the rotation of the spindle 4B1 to the first and second hinge elements 4A3, 4A4.
The first and second hinge elements 4A3, 4A4 are connected to the spindle 4B1 though the transfer element 4A5, whereby a rotation of the turning knob 4C6 is translated into a vertical movement of the transfer element 4A5, where the vertical movement of the transfer element 4A5 in turn will result in a rotating motion of both the first and second hinge elements 4A3, 4A4. As the first and second hinge elements 4A3, 4A4 are connected to the rotating part 4A1 of the lock-off assembly 4A, a rotation of the first and second hinge elements 4A3, 4A4 will result in that the rotating part 4A1 is moved towards the stationary part 4A2 of the lock-off assembly 4A in order to lock the lock-off assembly 4A. The first and second hinge element 4A3, 4A4 will through the rotation be slightly overstretched before they hit their end stop.
Each of the rotating part 4A1 and the stationary part 4A2 of the lock-off assembly 4A is, on a side facing the opposite part, provided with an anti-slip material 4A6 in order to prevent a movement of the inward section and the return section of the seat belt SB when the seat belt tensioner device 4 is brought to a tensioning position.
When a user turn the rotating knob 4C6, the spindle 4B1 will be moved forward towards the lock-off assembly 4A. The movement of the spindle 4B1 in the axial direction of the tensioner assembly 4B allows one end of the spindle 4B1 to engage with and also rotate the first and second hinge elements 4A3, 4A4 and to push the lock-off assembly 4A away from the tensioner assembly 4B.
The invention has now been explained with different embodiments. Only elements related to the invention are described and a skilled person will understand that one may make several alterations and modifications to the described and shown embodiments that are within the scope of the invention as defined in the following claims.

Claims (10)

1. A child safety seat (1) for use in a vehicle, which child safety seat (1) comprises a frame (2) and a child seat (3) connected to the frame (2), which frame (2) is provided with belt guide means for guiding a seat belt (SB) fitted in the vehicle for fixing the child safety seat (1) in position in a seat of the vehicle, c h a r a c t e r i z e d i n t h a t the child safety seat (1) further comprises a seat belt tensioner device (4) comprising means for moving the seat belt (SB) from an initial position to a tensioning position, in which the seat belt (SB) is tensioned relative to the initial position, in which tensioning position the seat belt tensioner (4) grips and holds an inward section and a return section of the seat belt (SB) , thereby preventing a relative movement between the inward section and the return section of the seat belt (SB).
2. The child safety seat (1) according to claim 1,
c h a r a c t e r i z e d i n t h a t the seat belt tensioner device (4) comprises a lockoff assembly (4A), a tensioner assembly (4B) and a torque limiter assembly (4C).
3. The child safety seat (1) according to claim 2,
c h a r a c t e r i z e d i n t h a t the torque limiter assembly (4C) comprises a first annular element (4C1), one end of the first annular element being provided with a plurality of teeth (4C2), a second annular element (4C3), one end of the second annular element (4C3) being provided with a plurality of teeth (4C4), an elastic element (4C5) being arranged between the first annular element (4C1) and a turning knob (4C6).
4. The child safety seat (1) according to claim 3,
c h a r a c t e r i z e d i n t h a t one end of the elastic element (4C5) is supported inside turning knob (4C6), while the opposite end of the elastic element (4C5) is abutting against an end of the first annular element 4C1 not provided with the plurality of teeth 4C2.
5. The child safety seat (1) according to claims 3 and 4,
c h a r a c t e r i z e d i n t h a t the plurality of teeth (4C2, 4C4) provided on the first and second annular elements (4C1, 4C3) have a corresponding or cooperating form.
6. The child safety seat (1) according to claim 2,
c h a r a c t e r i z e d i n the lock-off assembly (4A) comprises a rotating part (4A1), a stationary part (4A2), a first and second hinge element (4A3, 4C4) and a transfer element (4A5).
7. The child safety seat (1) according to claim 6,
c h a r a c t e r i z e d i n t h a t the first hinge element (4A3) and the second hinge element (4A4) are connected to each other through a bolt (4A5).
8. The child safety seat (1) according to any of the claims 6 or 7, characterized in that each of the rotating part and the stationary part (4A1, 4A2) is, on a side facing the opposite part, provided with an anti-slip material (4A6).
9. The child safety seat (1) according to claim 2,
c h a r a c t e r i z e d i n t h a t the tensioner assembly (4B) comprises a spindle (4B1) and two rotatable part (4B2) provided with teeth (4B3).
10. The child safety seat (1) according to any preceding claims,
c h a r a c t e r i z e d i n t h a t the lock-off assembly (4A) of the seat belt tensioner device (4) closes and tensions the seat belt (SB) simultaneously, through the same turning movement.
NO20211176A 2021-10-01 2021-10-01 Child safety seat with seat belt tensioner device NO20211176A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NO20211176A NO20211176A1 (en) 2021-10-01 2021-10-01 Child safety seat with seat belt tensioner device
PCT/EP2022/077395 WO2023052633A1 (en) 2021-10-01 2022-09-30 Child safety seat with seat belt tensioner device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20211176A NO20211176A1 (en) 2021-10-01 2021-10-01 Child safety seat with seat belt tensioner device

Publications (1)

Publication Number Publication Date
NO20211176A1 true NO20211176A1 (en) 2023-04-03

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NO20211176A NO20211176A1 (en) 2021-10-01 2021-10-01 Child safety seat with seat belt tensioner device

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Citations (5)

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US20030127894A1 (en) * 2001-11-30 2003-07-10 Mcneff James R. Child automotive safety seat with integral seat belt tensioner
EP1407922A2 (en) * 2002-10-11 2004-04-14 Takata Corporation Child seat
EP1612091A1 (en) * 2004-06-10 2006-01-04 Maxi Miliaan B.V. Infant vehicle seat and frame suitable for use with such an infant vehicle seat
US20110074195A1 (en) * 2004-05-17 2011-03-31 Orbit Baby, Inc. Actively securable base for a modular child restraint system
WO2016115366A2 (en) * 2015-01-15 2016-07-21 Thorley Industries Llc Child restraint system

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NL1026766C2 (en) 2004-08-02 2006-02-06 Maxi Miliaan Bv Child vehicle seat and chassis suitable for such a child vehicle seat.
DE202010008803U1 (en) * 2010-10-13 2011-01-13 Curt Würstl Vermögensverwaltungs-Gmbh & Co. Kg Seat anchoring element for child safety seats or baby carrier
CN202319975U (en) * 2011-08-01 2012-07-11 克斯克管理公司 Child restraint system used in vehicle comprising anchoring elements
ITMI20131282A1 (en) 2013-07-31 2015-02-01 Artsana Spa SEAT FOR CARS FOR CHILDREN WITH TENSIONER OF THE SAFETY BELT OF THE VEHICLE THAT BRAINS IT TO THE SEAT OF THIS LAST
US10189381B2 (en) * 2016-09-16 2019-01-29 Wonderland Switzerland Ag Safety belt assembling device capable of assembling a child restraint system with a vehicle seat
CA3007156C (en) * 2017-06-01 2020-05-12 Wonderland Switzerland Ag Support base for a child safety seat

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030127894A1 (en) * 2001-11-30 2003-07-10 Mcneff James R. Child automotive safety seat with integral seat belt tensioner
EP1407922A2 (en) * 2002-10-11 2004-04-14 Takata Corporation Child seat
US20110074195A1 (en) * 2004-05-17 2011-03-31 Orbit Baby, Inc. Actively securable base for a modular child restraint system
EP1612091A1 (en) * 2004-06-10 2006-01-04 Maxi Miliaan B.V. Infant vehicle seat and frame suitable for use with such an infant vehicle seat
WO2016115366A2 (en) * 2015-01-15 2016-07-21 Thorley Industries Llc Child restraint system

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