Headrest for child seat

Abstract

To provide a headrest for a child seat which maintains comfort of a head during drive and reduces impact on the head when accident of a vehicle happens.SOLUTION: A headrest 10 for a child seat comprises a stationary cushion 20 which supports occipital region of a user on the child seat and a movable cushion 30 of which thickness of the cushion increases by rotating from such a state as to expand in a flat shape due to inertia force at collision of a vehicle by combining by hinge with the stationary cushion 20 so as to make it possible to rotate and then overlapping on the stationary cushion 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a headrest for a child car seat that is attached to a car seat. [Background technology]

[0002] It is now mandatory to use a child car seat when transporting infants and young children in a car. A child car seat ensures safety and supports posture, and is composed of the seat itself, a harness, a headrest, a harness pad, etc. Figure 7 is an explanatory diagram of a conventional child car seat headrest. Of these components, headrest 1 plays an important role in reducing the impact to the head in the event of a car accident by supporting the child's head and keeping it in the correct position. Specifically, headrest 1 is configured with built-in impact absorbing material, an appropriate shape and internal structure, and increased thickness to absorb the energy generated during a collision and disperse it to reduce the impact to the head.

[0003] Various technologies relating to headrests have been filed in the past, and the headrest disclosed in Patent Document 1 comprises first and second headrest members, and the second headrest member is configured to be selectively movable relative to the first headrest member. The headrest disclosed in Patent Document 2 includes a main section that supports the rear of the head and left and right side sections that are rotatably connected to the main section, and detects acceleration applied in the left-right direction, rotating forward until the right section is positioned on the right side of the head when rightward acceleration is detected, and rotating forward until the left section is positioned on the left side of the head when leftward acceleration is detected, thereby restricting left-right movement of the head due to centrifugal force. This stabilizes the head posture and reduces motion sickness.

[0004] However, the technology disclosed in Patent Document 1 can reduce or eliminate the gap by rotating the second headrest member when the seat back is tilted toward the seat base, preventing it from being caught in between. The second headrest member is constantly biased toward the first headrest member by a biasing member. Furthermore, in the technology disclosed in Patent Document 2, the left and right side sections are simply rotated forward relative to the main section by the left and right drive devices and the control device. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Chinese Patent No. 117104092 [Patent Document 2] Patent No. 7436909 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above-mentioned problems of the prior art, the problem to be solved by the present invention is to provide a headrest for a child car seat that maintains head comfort while driving and reduces impact to the head in the event of a car accident. [Means for solving the problem]

[0007] As a first means for solving the above problems, the present invention provides a child car seat with a fixed cushion that supports the rear of the head of a child car seat user, To provide a headrest for a child seat, which is provided with a movable cushion that is hinged rotatably to the fixed cushion and rotates by inertial force from a flat deployed state when a car collides, and folds over the fixed cushion, increasing the thickness of the cushion. According to the first means, the fixed cushion and the movable cushion are in an open position while driving, maintaining head comfort, and in the event of a car accident, the fixed cushion and the movable cushion overlap, increasing the overall thickness of the cushion and reducing the impact on the head. Furthermore, the thickness of the cushion can be increased by the inertia of the car collision without requiring any power source.

[0008] As a second means for solving the above problem, the present invention provides a headrest for a child seat according to the first means, characterized in that the movable cushion is hinged to the upper end of the fixed cushion and rotates vertically. According to the second means, the movable cushion can rotate and be folded into the fixed cushion with good responsiveness to the inertial force during a vehicle collision.

[0009] As a third means for solving the above problem, the present invention provides a headrest for a child seat according to the first means, characterized in that the movable cushion is hingedly connected to both left and right ends of the fixed cushion and rotates horizontally. According to the third aspect, the rotation range of the movable cushion can be reduced even if the area of ​​the headrest is increased. By reducing the rotation range, the movable cushion can be folded without being affected by obstacles when rotating.

[0010] As a fourth means for solving the above problem, the present invention provides a headrest for a child seat, characterized in that in any one of the first to third means, the movable cushion has a higher cushion density than the fixed cushion. According to the fourth aspect, the cushion density of the movable cushion is made higher than that of the fixed cushion, thereby reducing the impact on the head in the event of a car collision. Also, the cushion density of the fixed cushion is made lower than that of the movable cushion, providing an appropriate softness that improves the feel of the head while driving, thereby increasing comfort.

[0011] As a fifth means for solving the above-mentioned problems, the present invention provides a headrest for a child seat according to the fourth means, characterized in that the cushion density of the movable cushion can be designed to be arbitrarily changed. According to the fifth aspect, the cushion density can be changed to reduce the impact on the head at the time of collision, which changes as the baby grows.

[0012] As a sixth means for solving the above-mentioned problems, the present invention provides a child seat headrest according to any one of the first to third means, characterized in that it is provided with an attachment / detachment means for temporarily fixing the movable cushion to the fixed cushion in an expanded state and for detaching the movable cushion by the inertial force during a vehicle collision. According to the sixth aspect, the movable cushion is prevented from folding up except at the time of a collision, eliminating the stress and inconvenience of unintentional folding, and improving the ease of use and comfort of the headrest.

[0013] As a seventh means for solving the above-mentioned problems, the present invention provides a child seat headrest according to any one of the first to third means, characterized in that it further comprises a retaining means for rotating the movable cushion due to inertial force during a vehicle collision and maintaining the movable cushion folded over the fixed cushion. According to the seventh means, the unintended deployment of the movable cushion after a car collision can be prevented, thereby improving the safety of the headrest. [Effects of the Invention]

[0014] According to the present invention, it is possible to maintain head comfort while driving and reduce impact to the head in the event of a car accident. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an explanatory diagram of a headrest for a child car seat according to the present invention; [Figure 2] 1A to 1C are explanatory views of a child car seat headrest according to the present invention (1) before a collision, (2) during a collision, and (3) after a collision. [Figure 3] 10 is an explanatory diagram of a modified child seat headrest. FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] 10A and 10B are explanatory diagrams showing the results of a collision test of the child seat headrest of the present invention. [Figure 7] FIG. 1 is an explanatory diagram of a conventional child seat headrest. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a headrest for a child car seat according to the present invention will be described in detail below with reference to the drawings.

[0017] [Child seat headrest 10] 1 is an explanatory diagram of a child car seat headrest of the present invention. As shown in the figure, the child car seat headrest 10 of the present invention comprises a fixed cushion 20 that supports the back of the head of a user of a child car seat 2, and a movable cushion 30 that is rotatably hinged to the fixed cushion 20 and rotates due to inertial force in the event of a vehicle collision from a flat, unfolded state, and folds over the fixed cushion 20, increasing the thickness of the cushion.

[0018] The fixed cushion 20 is a cushion fixed to a position that comes into contact with the back of the head of the user of the child seat 2. The fixed cushion 20 is composed of a shock absorbing material of a predetermined size that fits the user's head, and a cushion cover that covers it. The fixed cushion 20 is in constant contact with the user's head to support it while driving. For this reason, the shock absorbing material used is one that is comfortable to the touch and has a cushion density that does not cause stress.

[0019] The movable cushion 30 is a cushion of approximately the same size as the fixed cushion 20. The movable cushion 30 is hinged to the fixed cushion 20 and can freely rotate around the axis of the hinge 40. The movable cushion shown in FIG. 1 is hinged to the upper end of the fixed cushion 20 and rotates vertically (up and down). Like the fixed cushion 20, the movable cushion 30 is composed of an impact absorbing material and a cushion cover that covers it. In the event of a car collision, the movable cushion 30 folds over the fixed cushion 20 and comes into contact with the user's head. For this reason, an impact absorbing material with a predetermined cushion density that can reduce the impact during a collision is used for the movable cushion 30. Therefore, an impact absorbing material with a higher cushion density than the fixed cushion 20 is used for the movable cushion 30.

[0020] A hinge connection (hinge 40) is formed between the upper end of the fixed cushion 20 and the lower end of the movable cushion 30. The hinge connection is created by sewing the cushion covers of the fixed cushion 20 and the movable cushion 30 together. The hinge connection can be created, for example, by sewing the cushion covers together or by creating a crease between the cushion covers. The child seat headrest 10 configured as described above can be used in two forms: one in which the movable cushion 30 and the fixed cushion 20 are arranged one above the other and deployed flat (during driving), and one in which the movable cushion 30 rotates around the axis of the hinge 40 and folds over the fixed cushion 20, increasing the thickness of the cushions (in the event of a collision).

[0021] [Effect] FIG. 2 is an explanatory diagram of the child car seat headrest of the present invention (1) before a collision, (2) during a collision, and (3) after a collision. Child seats 2 can be used in either forward-facing or rear-facing positions. Forward-facing seats are used when the infant faces forward in the direction of travel of the vehicle, while rear-facing seats are used when the infant faces backward in the opposite direction of travel of the vehicle. Impacts from a vehicle can include a frontal collision and a rear-end collision (a collision from a following vehicle).

[0022] (A) shows a rear-end collision of a following vehicle with the child car seat 2 facing backward. (1) Before the collision, the movable cushion 30 of the child car seat headrest 10 is in a flat, unfolded state above the fixed cushion 20, and the user's head is in contact with and supported by the fixed cushion 20. (2) When the following vehicle rear-ends the child car seat 2, an inertial force acts on the child car seat 2 toward the rear of the vehicle. The inertial force also causes the user's head to fall toward the rear of the vehicle, creating a large gap between the movable cushion 30 and the fixed cushion 20. At this time, the inertial force causes the movable cushion 30 to fall toward the rear of the vehicle and rotate around the axis of the hinge 40 toward the fixed cushion 20. (3) After the collision, the movable cushion 30 folds over the surface of the fixed cushion 20 to which it is hinged. The user, who is secured by the harness of the child car seat 2, is then pushed back toward the front of the vehicle by the reaction of the inertial force, and hits hard against the movable cushion 30, which is folded over the fixed cushion 20. The movable cushion 30 folded over the fixed cushion 20 has an increased cushion thickness, and therefore can significantly reduce the impact on the head compared to the fixed cushion 20.

[0023] (B) shows a frontal collision of the vehicle with the child car seat 2 facing forward. (1) Before the collision, the movable cushion 30 of the child car seat headrest 10 is in a flat, unfolded state above the fixed cushion 20, and the user's head is in contact with and supported by the fixed cushion 20. (2) When the vehicle collides head-on, an inertial force acts on the child car seat 2 toward the front of the vehicle. The inertial force also causes the user's head to fall toward the front of the vehicle, creating a large gap between the movable cushion 30 and the fixed cushion 20. At this time, the inertial force causes the movable cushion 30 to fall toward the front of the vehicle and rotate around the axis of the hinge 40 toward the fixed cushion 20. (3) After the collision, the movable cushion 30 folds over the surface of the fixed cushion 20 to which it is hinged. The user, who is secured by the harness of the child car seat 2, is then pushed back toward the rear of the vehicle by the reaction of the inertial force, and hits hard against the movable cushion 30, which is folded over the fixed cushion 20. The movable cushion 30 folded over the fixed cushion 20 has an increased cushion thickness, and therefore can significantly reduce the impact on the head compared to the fixed cushion 20.

[0024] (C) shows a frontal collision of the vehicle with the child car seat 2 facing rearward. (1) Before the collision, the movable cushion 30 of the child car seat headrest 10 is deployed flat above the fixed cushion 20, and the user's head is in contact with and supported by the fixed cushion 20. (2) When the vehicle collides, an inertial force acts on the child car seat 2 toward the front of the vehicle. The inertial force keeps the user's head in contact with the child car seat headrest 10. The user, who is secured by the harness of the child car seat 2, is returned to the rear of the vehicle by the reaction of the inertial force, and the user's head also falls toward the rear of the vehicle due to the reaction, creating a large gap between the movable cushion 30 and the fixed cushion 20. At this time, the movable cushion 30 falls toward the rear of the vehicle due to the reaction and rotates around the axis of the hinge 40 toward the fixed cushion 20. (3) After the collision, the movable cushion 30 folds over the surface of the fixed cushion 20 to which it is hinged. Then, the user who is secured by the harness of the child seat 2 is pushed back toward the front of the car after the recoil and hits the movable cushion 30 that is folded over the fixed cushion 20. The movable cushion 30 that is folded over the fixed cushion 20 has an increased cushion thickness, so it can reduce the impact on the head.

[0025] (D) The child car seat 2 is facing forward and is rear-ended by a following vehicle. (1) Before the collision, the movable cushion 30 of the child car seat headrest 10 is deployed flat above the fixed cushion 20, and the user's head is in contact with and supported by the fixed cushion 20. (2) When the following vehicle rear-ends the child car seat 2, an inertial force acts on the child car seat 2 toward the rear of the vehicle. The inertial force keeps the user's head in contact with the child car seat headrest 10. The user, who is secured by the harness of the child car seat 2, is returned to the front of the vehicle by the reaction of the inertial force, and the user's head also falls toward the front of the vehicle due to the reaction, creating a large gap between the movable cushion 30 and the fixed cushion 20. At this time, the movable cushion 30 falls toward the front of the vehicle due to the reaction and rotates around the axis of the hinge 40 toward the fixed cushion 20. (3) After the collision, the movable cushion 30 folds over the surface of the fixed cushion 20 to which it is hinged. Then, the user who is secured by the harness of the child seat 2 is pushed back toward the rear of the car after the recoil and hits the movable cushion 30 that is folded over the fixed cushion 20. The movable cushion 30 that is folded over the fixed cushion 20 has an increased cushion thickness, so it can reduce the impact on the head.

[0026] [Variation] Left and right deployment FIG. 3 is an explanatory diagram of a modified child car seat headrest. As shown in the figure, in the modified child car seat headrest 10A, a movable cushion 30A is hinged to both left and right ends of a fixed cushion 20A and rotates horizontally. The fixed cushion 20A has almost the same configuration as the fixed cushion 20 shown in FIG. 1, but differs in that the hinge connections are located on the left and right sides. The movable cushion 30A has almost the same configuration as the fixed cushion 20 shown in FIG. 1, but differs in that the fixed cushion 20A is divided vertically into two. The hinge connection of a hinge 40A is almost the same as that of the hinge 40 shown in FIG. 1, but differs in that it is located on both left and right ends of the fixed cushion 20A. The child seat headrest 10A configured as described above can be used in two forms: one in which the two movable cushions 30A are arranged on either side of the fixed cushion 20A and deployed flat (during driving), and the other in which the left and right movable cushions 30A rotate around the axis of the hinge 40A and fold onto the fixed cushion 20A, increasing the thickness of the cushions (in the event of a collision).The movements of the child seat 2 before, during, and after a collision in both forms (forward-facing and rear-facing) are the same as those of the configuration shown in Figure 2.

[0027] [Attachment / detachment means] FIG. 4 is an explanatory diagram of the attachment / detachment device. As shown in the figure, the attachment / detachment device 50 temporarily fastens the movable cushion 30 to the fixed cushion 20 when the cushion is unfolded and detaches due to inertial force during a vehicle collision. The attachment / detachment device 50 can be configured using fasteners such as hook-and-loop fasteners, hooks, magnets, or rubber. The attachment / detachment device 50 shown in FIG. 4 is a hook-and-loop fastener provided on the surface of the child car seat 2 and one of the main surfaces of the movable cushion 30 (the surface that contacts the surface of the seat when unfolded and the user's head when folded), and is composed of a loop side (the raised side) and a hook side (the fastening side). The attachment / detachment strength of the hook-and-loop fastener need only be such that it can temporarily fasten the movable cushion 30 to the fixed cushion 20 when the cushion is unfolded and detach due to inertial force during a vehicle collision, and can be adjusted by the material, area, etc. Such attachment / detachment device 50 prevents the movable cushion 30 from folding except during a collision, eliminating the stress and inconvenience of unintended folding and improving the ease of use and comfort of the headrest.

[0028] [Holding means] FIG. 5 is an explanatory diagram of a retaining means. As shown, the retaining means 60 is a means for maintaining the state in which the movable cushion 30 rotates and is folded over the fixed cushion 20 due to inertial force during a vehicle collision. Specific fasteners such as hook-and-loop fasteners, hooks, magnets, and rubber can be used for the retaining means 60. The retaining means 60 shown in FIG. 5 is a hook-and-loop fastener provided on the surface of the fixed cushion 20 (the surface that contacts the user's head) and one main surface of the movable cushion 30 (the surface that contacts the surface of the fixed cushion 20 when folded over), and is composed of a loop side (the raised side) and a hook side (the fastening side). The fastening strength of the hook-and-loop fastener need only be strong enough to maintain the state in which the movable cushion 30 rotates and is folded over the fixed cushion 20 due to inertial force during a vehicle collision, and can be adjusted by adjusting the material, area, etc. Such a retaining means 60 can prevent the movable cushion 30 from unintentionally unfolding after a vehicle collision, thereby improving the safety of the headrest.

[0029] Figure 6 is an explanatory diagram of the results of a collision test on the child car seat headrest of the present invention. The vertical axis of the figure shows the impact strength of the child car seat occupant's head, and the horizontal axis shows time (seconds). The solid line shows the child car seat headrest 10 of the present invention, and the dashed line shows a conventional headrest. According to the present invention, as shown by the arrow in Figure 6, even if the user is returned to the seat by the reaction of inertial force and their head hits hard against the movable cushion 30 folded over the fixed cushion 20, the thickness of the movable cushion 30 folded over the fixed cushion 20 is increased, so the impact on the head can be significantly reduced compared to a conventional headrest with only a fixed cushion. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and various modifications can be made without departing from the spirit and scope of the present invention. Furthermore, the present invention is not limited to the combinations shown in the embodiments, but can be implemented in various combinations. [Explanation of symbols]

[0030] 1 headrest 2. Child seats 10,10A Child seat headrest 20,20A Fixed cushion 30,30A Movable cushion 40,40A Hinge 50 Attachment / detachment means 60 Retention means

Claims

1. a fixed cushion that supports the rear of the head of a child car seat user; The child seat headrest is provided with a movable cushion that is hinged to be rotatable with the fixed cushion and rotates by inertial force from a flat deployed state when a vehicle collides, and folds over the fixed cushion, thereby increasing the thickness of the cushion.

2. 2. The child car seat headrest according to claim 1, The headrest for a child seat is characterized in that the movable cushion is hinged to the upper end of the fixed cushion and rotates vertically.

3. 2. The child car seat headrest according to claim 1, The headrest for a child seat is characterized in that the movable cushion is hingedly connected to both left and right ends of the fixed cushion and rotates horizontally.

4. A child car seat headrest according to any one of claims 1 to 3, The headrest for a child seat is characterized in that the movable cushion has a higher cushion density than the fixed cushion.

5. The child seat headrest according to claim 4, A child seat headrest, characterized in that the cushion density of the movable cushion can be freely changed in design.

6. A child car seat headrest according to any one of claims 1 to 3, The child seat headrest is characterized in that it is provided with a detachment means for temporarily fixing the movable cushion to the fixed cushion in an expanded state and for detaching the movable cushion by inertial force during a vehicle collision.

7. A child car seat headrest according to any one of claims 1 to 3, A headrest for a child seat, comprising a retaining means for rotating the movable cushion by inertial force in the event of a vehicle collision and maintaining the state in which the movable cushion is folded over the fixed cushion.

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