JP-7856020-B2 - Vehicle headrest

Inventors

• 高木 宥誌

Assignees

• トヨタ紡織株式会社

Dates

Publication Date

20260511

Application Date

20230207

Claims (4)

1. The headrest body and A movable part that can be displaced in the seat front-rear direction relative to the headrest body, A louver configured to expel air from inside the headrest body toward the front of the seat, An adjustment mechanism is configured to change the posture of the louvers in conjunction with the displacement of the movable part, such that the exhaust angle of the louvers with respect to the horizontal direction decreases as the movable part is displaced forward of the seat. A vehicle headrest equipped with [feature/feature].
2. A vehicle headrest according to claim 1, The adjustment mechanism has an elastic body attached to the movable part and the rotation axis of the louver, A vehicle headrest, wherein the elastic body is configured to stretch in response to the displacement of the movable part forward of the seat, thereby rotating the rotation axis in a first direction, and to contract by elastic force when the movable part is displaced backward of the seat, thereby rotating the rotation axis in a second direction opposite to the first direction.
3. A vehicle headrest according to claim 1, The adjustment mechanism is a rack and pinion mechanism including a rack provided on the movable part and a pinion connected to the rotation axis of the louver, for use as a vehicle headrest.
4. A vehicle headrest according to claim 1, The adjustment mechanism is a vehicle headrest having a crank mechanism connected to the movable part and the rotation axis of the louver.

Description

This disclosure relates to a vehicle headrest. In vehicle seats, ventilation devices that direct air to the occupant's neck are known (see Patent Documents 1 and 2). In these ventilation devices, the direction of the air outlet is variable. Japanese Patent Publication No. 2020-36787Japanese Patent Publication No. 2020-36788 Figures 1A and 1B are schematic diagrams of a vehicle headrest in an embodiment.Figures 2A and 2B are schematic diagrams of the adjustment mechanism in the vehicle headrest shown in Figure 1A.Figures 3A and 3B are schematic diagrams of the adjustment mechanism in an embodiment different from that shown in Figure 2A.Figures 4A and 4B are schematic diagrams of the adjustment mechanism in an embodiment different from that shown in Figure 2A. Embodiments to which this disclosure applies will be described below with reference to the drawings. [1. First Embodiment] [1-1. Structure] The vehicle headrest 1 shown in Figures 1A and 1B constitutes a part of the vehicle seat. The vehicle headrest 1 comprises a headrest body 2, a movable part 3, a drive source 4, a fan 5, a louver 6, and an adjustment mechanism 7. <Headrest body> The headrest body 2 is attached to the back of a vehicle seat. The headrest body 2 houses a drive source 4, a fan 5, a louver 6, and an adjustment mechanism 7. Inside the headrest body 2, there is a ventilation passage that communicates with the louver 6. <Movable part> The movable part 3 is attached to the headrest body 2 so as to be displaceable in the front-rear direction of the seat. The movable part 3 has a support part 31 that supports the head of the person sitting, and a shaft 32 that extends from the support part 31 toward the rear of the seat and is held by the headrest body 2. <Power source> The drive source 4 displaces the movable part 3. The drive source 4 includes a transmission element such as a gear that moves the shaft 32 in the forward and backward direction of the seat, and a motor. <Fans> The fan 5 draws air in from outside the headrest body 2 and discharges it to the outside of the headrest body 2 via the louvers 6. The vehicle headrest 1 may also be equipped with a device to cool or heat the air blown by the fan 5. <Luva> The louvers 6 are configured to expel air from inside the headrest body 2 toward the front and downward of the seat. Specifically, the louvers 6 expel air toward the neck of the person seated. The louver 6 has multiple slats arranged at intervals in the vertical direction. The angle of inclination of the multiple slats (i.e., the angle between the slat surface and the horizontal direction) defines the exhaust angle θ of the louver 6 relative to the horizontal direction. The exhaust angle θ of the louver 6 is adjustable. That is, the multiple blades of the louver 6 can swing vertically. The direction of exhaust for the air supplied by the fan 5 is adjusted by the louver 6. <Adjustment mechanism> As shown in Figure 1B, the adjustment mechanism 7 is configured to change the posture of the louvers 6 in conjunction with the displacement of the movable part 3, such that the discharge angle θ of the louvers 6 with respect to the horizontal direction decreases as the movable part 3 is displaced forward of the seat. Figures 2A and 2B show an example of the adjustment mechanism 7. This adjustment mechanism 7 has an elastic body 71. The elastic body 71 is attached to the movable part 3 and the rotation axis 62 of the louver 6. The rotation axis 62 is the axis that rotates the multiple slats 61. One end of the elastic body 71 is wound around the rotating shaft 62. The multiple vanes 61 may be directly fixed to the rotating shaft 62, or they may be indirectly connected to the rotating shaft 62 by elements such as cams and gears. The elastic body 71 is configured to stretch as the movable part 3 is displaced forward from the seat, thereby rotating the rotation axis 62 in the first direction D1. Conversely, when the movable part 3 is displaced backward from the seat, it contracts due to its elastic force, rotating the rotation axis 62 in the second direction D2, opposite to the first direction D1. Therefore, as shown in Figure 2B, when the movable part 3 is displaced forward of the sheet, the rotation of the rotation axis 62 in the first direction D1 due to the tension of the elastic body 71 causes the vane 61 to rotate upward, and the discharge angle of the louver 6 decreases. On the other hand, as shown in Figure 2A, when the movable part 3 is displaced to the rear of the seat, the vane 61 rotates downward due to the rotation of the rotation axis 62 in the second direction D2 accompanying the contraction of the elastic body 71, and the discharge angle of the louver 6 increases. Figures 3A and 3B show another example of the adjustment mechanism 7. This adjustment mechanism 7 has a rack and pinion mechanism 72. The rack and pinion mechanism 72 has a rack 72A, a pinion 72B, and an auxiliary gear 72C. The rack 72A is formed by protrusions and indentati