Baby car seat and baby carriage with such a seat

Abstract

stroller seat (14), characterized by the following features: the stroller shell (14) has a housing (1) of circular cross-section and extendable rods (2) locked in the rest position and a spring force (3) is exerted on the rods (2) in such a way that they enclose a child (4) in the stroller shell (14) when they are unlocked.

Description

[0001] The present invention relates to a stroller shell. The present invention further relates to a stroller equipped with such a shell. State of the art

[0002] Protecting pedestrians, motorcyclists, cyclists, and other vulnerable road users from the consequences of a collision with a motor vehicle is a key concern of vehicle safety. Statistical surveys show that a large proportion of traffic accidents involving pedestrians occur in urban areas and while pedestrians are crossing the road.

[0003] Conventional automotive safety technology aims to reduce the severity of pedestrian injuries in a collision. This includes the design of the vehicle's front end and hood, which are designed to deform and absorb impact energy during an impact. The accident sequence during a collision can be divided into different phases (see Fig. 1): the contact phase or primary impact, the flight phase, and the secondary impact. During the contact phase, the pedestrian is struck by the front of the vehicle and accelerates, which, depending on the circumstances, can lead to a slide or flight over the vehicle. The secondary impact, which follows the initial contact, is often characterized by the pedestrian hitting the roadway and carries a high risk of injury.

[0004] AT 10 689 B clearly covers the subject matter of the preamble of claim 1.

[0005] WO 2018 / 159 968 A1 discloses a body protection device, which is particularly arranged on a stroller. In the event of an accident detected by an acceleration sensor, a continuous protective cover is extended from the device partially surrounding the person to be restrained. The force for the extension movement is provided by springs that are held under tension by a positive locking mechanism until triggered.

[0006] A safety device for a stroller is known from CN 1 09 910 981 A. A detection device detects the use of the stroller, and a safety bar stored in the stroller rotates over the child. When not in use, the safety bar is held in position by a positive locking mechanism. It is actuated by an electromagnetic actuator.

[0007] CN 1 12 874 616 A discloses a stroller with an automatic brake. It also discloses a bar arranged in the side of the stroller, which can be extended in a sleep mode and extends above the stroller.

[0008] KR 2014 0 130 082 A describes a child seat in which a bar in front of the child seat can be rotated to reduce the risk of the child falling out. At least one spring is used to enable the rotation.

[0009] CN 1 16 373 981 A concerns a stroller with an active safety guard. The guard is placed over the stroller from the front and back to protect the child.

[0010] WO 2012 / 035300 A1 discloses a child seat with a protective device. The protective device is placed over the child seat when the child is in use to protect the child and consists of an inflatable airbag. The user's fall is detected by an acceleration sensor. Disclosure of the invention

[0011] One problem is that conventional strollers do not provide adequate protection for the child in the event of a side-on collision with a vehicle. Current stroller safety features focus primarily on structural stability, preventing accidental rolling by braking, and securing the child in the stroller with harness systems. However, these measures are primarily intended for normal stroller use and are not designed to respond to a traffic accident.

[0012] However, if such a stroller collides with a vehicle from the side, the stroller may move violently, putting the child at risk of being ejected from the stroller. The consequences of such a secondary impact—the child hitting the ground after the initial collision with the vehicle—can be serious.

[0013] Another problem is the lack of automated safety mechanisms in strollers that could be activated in the event of a collision. Although modern vehicles are equipped with numerous sensors and automatic safety systems to protect pedestrians in the event of an accident, such systems are completely lacking in strollers. Such an automatic safety device would have to activate independently at the moment of a collision, without the intervention of an accompanying person, to immediately protect the child.

[0014] The described problem is solved by a stroller shell and a stroller with such a shell according to the independent claims.

[0015] This approach has the advantage of creating a protective cocoon around the child. In the event of a collision, the inventive protective mechanism automatically unlocks, enclosing the child inside the stroller shell and preventing it from being ejected uncontrollably.

[0016] This mechanism significantly reduces the risk of serious injuries caused by a child's secondary impact with the road surface. The use of cushions and covers that conceal the extendable bars when the seat is in the rest position prevents any interference with everyday use.

[0017] The use of special materials such as polytetrafluoroethylene in the guides of the bars contributes to low-friction and reliable activation of the protective mechanism. The integration of a net along the bars also prevents the child from being exposed to forces in the event of a collision.

[0018] One embodiment involves the integration of sensors that, in conjunction with electronics, provide the necessary signals to trigger the protective mechanism as soon as a collision is detected. This creates an automated safety system that is triggered independently of human reactions.

[0019] A further advantage arises from the design of the release mechanism, which releases the spring force through electromagnetic activation, thus providing rapid and secure protection. The intelligent design of the device, which allows for a quick return to the idle state even after the protective mechanism has been triggered, also ensures its reusability.

[0020] Further advantageous embodiments of the invention are specified in the dependent patent claims. Short description of the drawings Fig. Figure 1 shows the three phases of a collision between a vehicle and a pedestrian, from the primary impact through the flight phase to the secondary impact. Fig. 2 shows the front view of a stroller with a car approaching from the right. Fig. 3 shows how the stroller is hit from the side by the car. Fig. 4 shows how the stroller is deformed by the front of the car and accelerated to its speed. Fig. 5 shows how the stroller detaches from the car and hits the ground uncontrollably. Fig. 6 is a perspective view of a stroller shell according to the invention with circumferentially integrated bars. Fig. Figure 7 is a perspective view of the tray with extended rods and a net attached. Fig. Figure 8 shows a cross-section through the stroller shell including the housing, retracted bars and their guides, upholstery, mattress and child lying on it. Fig. 9 shows a detailed section through the electronics, sensors, and device for unlocking one of the rods resting in the housing at its upper end. Fig. Figure 10 shows the device in question unlocking the rod in response to a shock. Fig. 11 shows one of the Fig. 8 corresponding cross-section of the shell with extended rods. Fig. Figure 12 shows a cross-section of the upper part of the housing, which is provided with upholstery foam, fabric cover and tear seams, before the rods are extended. Fig. 13 shows the side view of a rod with damping foam on the inside. Embodiments of the invention

[0021] Fig. Figure 2 shows the front view of a stroller that is on a collision path with a passenger car approaching from the right. Fig. 3 shows the moment when the stroller is hit from the side by the car. As in Fig. As illustrated in Figure 4, the stroller is accelerated to the speed of the car by the front of the car. The deformation of the front of the car and the stroller indicates the intensity of the collision. Fig. Finally, Figure 5 shows, in a sequence of alternative positions, how the stroller detaches from the car and crashes uncontrollably.

[0022] In Fig. Figure 6 shows a perspective view of a stroller shell (14) with integrated rods (15) all around. These spring-loaded rods are not visible when not in use and are initially concealed by fabric and upholstery.

[0023] Fig. Figure 7 shows the shell with the bars (2) pushed upwards all the way around, to which a net (27) is attached. This net provides additional protection and prevents the child (4) from being thrown from the stroller in the event of a collision.

[0024] A cross section through the stroller shell (14) as shown in Fig. 8 shows the housing (1), the retracted bars (2) and their guides (8), a mattress including padding (5), and the child (4) lying on it. The guides (8) are arranged both inside and outside the housing of the infant carrier and are made of a material with a low coefficient of friction, such as Teflon.

[0025] How Fig. As illustrated in Figure 9, each rod (2) is provided with a device (100) that locks it in the resting position, as the rods would otherwise be pushed upward by spring force. To this end, a ball (104) is pressed against a notch in the rod by a spring-loaded piston located in a hollow cylinder (101) of the device (100). The spring (106) presses the movable piston (103) against the ball (104).

[0026] In Fig. Figure 10 shows the described device (100) unlocking the rod (2) in response to a shock. During this process, the ball is retracted from the notch (110) in the rod by a spring-loaded piston (103), which is triggered by the activation of a solenoid coil (102 - Fig. 9) is made possible.

[0027] The Fig. 11, the spring force (3) pushes the thus unlocked bars upwards along a circular path to lift the child (4 - Fig. 8) to protect against the consequences of a possible secondary impact.

[0028] Fig. Figure 12 shows the upper section of the housing (1), which is equipped with cushioning foam (121), fabric cover (120), and tear seams (122 and 123). These components are designed to release the integrated rods (2) upon activation of the protective mechanism without damaging the housing (1) itself. The defined tear seams (122 and 123) enable a controlled tearing of the fabric cover, allowing the rods (2) to extend unhindered.

[0029] Finally, Fig. 13 The side view of a bar (2) equipped with cushioning foam (140) on the inside facing the child. This foam provides additional cushioning and helps to reduce the forces acting on the child (4 - Fig. 8) during the extension of the bars (2), thus increasing the comfort and protection of the child.

Claims

[1] Stroller seat (14), with the following features: - the stroller shell (14) has a housing (1) of circular cross-section and extendable rods (2) locked in the rest position and - a spring force (3) is exerted on the rods (2) in such a way that they enclose a child (4) in the stroller shell (14) when they are unlocked, characterized by following features: - the housing (1) contains a padding (5) for supporting the child (4) and a net (27) attached to the bars (2) and has guides (8) arranged on the inside and outside of the bars (2), - the rods (2) are integrated all around (15) on the stroller shell (14) and are covered by the padding (5) in the rest position and - on the rods (2), the guides (8) are coated with a solid lubricant, namely polytetrafluoroethylene. [2] Stroller seat according to claim 1, characterized by following features: - the stroller shell (14) contains an electronic system (40), a sensor system (41) for detecting any vibration and a device (100) for unlocking the rods (2) resting in the housing (1) and - the electronics (40) are designed to trigger the device (100) when the vibration exceeds a certain level. [3] Stroller seat according to claim 2, characterized by following features: - the device (100) comprises a hollow cylinder (101), a magnetic coil (102) arranged therein and a piston (103) movable within the latter and - the device (100) is such that when triggered, the magnetic coil (102) draws the piston (103) into the hollow cylinder (101). [4] Stroller shell according to claim 3, characterized by following features: - the device (100) further comprises a spring (106) resting on the piston (103) in the hollow cylinder (101) and a ball (104) arranged opposite the spring (106) on the piston (103), and - the spring (106) presses the ball (104) into a notch (110) of the respective rod (2) via the piston (103). [5] Stroller shell according to one of claims 1 to 4, characterized by following features: - the housing (1) is provided with a fabric cover (120) on the front side of the rods (2) and a cushioning foam (121) covered by the latter and - on both sides of the rods (2), the fabric cover (120) has flexible tear-off seams (122 and 123). [6] Stroller shell according to one of claims 1 to 5, characterized by following feature: - the bars (2) are provided with a damping foam (140) on the child's side (4). [7] A stroller with a shell according to any one of claims 1 to 6.

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