JPS6364202B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a headrest device for a vehicle seat, and more particularly to an improvement in a headrest device in which a safety pillow for protecting the head of an occupant is assembled above the seat backrest so that its position can be adjusted in the longitudinal direction. It is.

The inventors previously developed a headrest device of this type, in which a pair of support plates were integrally assembled with the upper ends of a pair of stays that were fixed to the backrest of a vehicle seat so that their positions could be adjusted in the vertical direction. A pair of side plates are fixed to the interior of a safety pillow disposed above the backrest so as to face each other at a predetermined interval, and each of these side plates is connected to each of the support plates so as to be displaceable in the front-rear direction of the seat. , and a plurality of teeth are disposed in the front-back direction on the upper part of one of the support plates, and a pole that selectively engages with these teeth is spring-biased to the side plate adjacent to the support plate. We proposed an assembled headrest device. However, in the headrest device having such a configuration, since the support plate provided with the teeth is made of metal and the pole is also made of metal, when the pole meshes with each tooth of the support plate, There is a problem in that an impact noise is generated and this impact noise gives discomfort to the occupants. In addition, in order to eliminate such impact noise, it is possible to fix an elastic member to the engaging surface of the pole and use the elastic member to cancel out the impact noise, but if such a method is implemented, However, each time the elastic member meshes with each of the teeth of the support plate, it is rubbed and worn out in a short period of time, resulting in poor durability.

In order to deal with the above-mentioned problems, the present invention provides a receiving plate made of an elastic material such as a soft synthetic resin, which is provided with a plurality of teeth corresponding to each tooth of the support plate, so that the upper surface of each tooth is the same as the support plate. The pawl is integrally fixed to the side surface of the support plate so as to protrude slightly upward from the top surface of each tooth portion of the receiving plate, and the pawl selectively engages with the top surface of each tooth portion of the receiving plate. A headrest device has been devised, and one embodiment thereof will be described below with reference to the accompanying drawings.

Among the drawings, FIG. 1 schematically shows a headrest device to which the present invention is applied, and the safety pillow 10 shown in this drawing is supported by the mechanism shown in FIG. The position is adjusted in the front-rear direction above the backrest 20 using a point P as a fulcrum and fixed at an arbitrary position. As shown in FIG. 2, the safety pillow 10 is made by covering the outer periphery of a synthetic resin cushion material constituting its main body with a synthetic resin outer skin 11, and has a hollow inner cavity 12 inside. A pair of side plates 13 are formed on both side walls of the inner cavity 12.
a and 13b are integrally fixed facing each other at a predetermined interval. In addition, a pair of stays 21a and 21b for supporting the safety pillow 10 at a desired height are
As shown in FIG. 1, it is arranged to be fixed to the backrest 20 so that its position can be adjusted in the vertical direction, and a pair of support plates 23a and 23b are provided at the upper end of each stay 21a and 21b at a predetermined interval. The frames 24, which are assembled facing each other at , are integrally fixed. Thus, the safety pillow 10 has each support plate 23a, 23b.
The side plates 13a, 13b are connected to each other by a pair of link arms 14a, 14b disposed in an inverted V shape so as to be displaceable in the front-rear direction, and both stays 21a, 21
It is supported by b.

In the above configuration, the support plate 23a on the right side in the figure
A plurality of toothed portions 25 are arranged in the front-rear direction on the upper part of the holder, and a pawl 26 that selectively engages with these toothed portions 25 is pivotably mounted on the side plate 13a adjacent to the support plate 23a so as to be rotatable in the vertical direction. Spring 2
7 is biased downward. In this embodiment, as shown in FIGS. 3 and 4, a plurality of teeth 31 corresponding to the teeth 25 of the support plate 23a are made of an elastic material such as a soft synthetic resin. A receiving plate 30 is integrally fixed to the outer surface of the supporting plate 23a, and the upper surface of each toothed portion 31 of this receiving plate 30 is positioned slightly above the upper surface of each toothed portion 25 of the supporting plate 23a. ing. Thereby, the pawl 26 engages with the upper surface of each toothed portion 31 of the receiving plate 30, but does not directly engage with the upper surface of each toothed portion 25 of the support plate 23a.

In this embodiment, the front end and the rear end of the support plate 23a are provided with a protrusion 28 that engages with the base end 26a of the pole 26 and a protrusion 29 that engages with the tip of the pole 26.
is provided protrudingly, and furthermore, the pole 2 of the side plate 13a
A projection 15 with which the upper end surface of the pole 26 engages is provided in a portion located above the pole 6 .

In the headrest device configured as described above, the pair of stays 21a and 21b are connected to the backrest 2.
0 at a desired height position, the pawl 26 is engaged with one of the teeth 31 of the receiving plate 30, and the safety pillow 10 is fixed at its adjusted position.
When the occupant wants to position the safety pillow 10 fixed in this way in front of the seat, when the occupant moves the safety pillow 10 forward by hand, the pawls 26 engage against the urging force of the springs 27. It springs up along the upper surface of the previous toothed portion 31 and falls into the next toothed portion 31 to engage. (See FIG. 5) At this time, the pawl 26 is moved toward the toothed portion 31 by the biasing force of the spring 27.
Even though the receiving plate 30 forming the teeth 31 is made of an elastic material, no impact noise is generated.
Thus, when the safety pillow 10 is fixed at a desired position, when the occupant's head is received by the safety pillow 10 in the event of a vehicle collision, the teeth 31 of the receiving plate 30 with which the pawl 26 is engaged is deformed and engaged with the toothed portion 25 of the support plate 23a corresponding to the toothed portion 31 thereof. Therefore, the safety pillow 10 is reliably supported against the load applied during a collision due to the engagement between the pole 26 and the support plate 23a, and serves to protect the occupant's head. In addition, if you want to readjust the safety pillow 10 from its intermediate adjustment position to the rear of the seat, the safety pillow 10
0 to the forward movement end, the pawl 26 is flipped upward due to the engagement between its base end 26a and the protrusion 28 located at the front end of the support plate 23a, and as a result, the biasing force of the spring 27 is reversed upward. The protrusion 1 of the side plate 13a on which the pole 26 is located
5 is engaged and held. (See Figure 6) As a result,
Even if the safety pillow 10 is moved backward, the pawl 26 moves backward without engaging any of the teeth 31 of the receiving plate 30, and at the end of its backward movement, the protrusion 29 located at the rear end of the support plate 23a. The receiving plate 30 engages with the front end surface of the receiving plate 30 against the upward biasing force of the spring 27.
It engages with the upper surface of the tooth portion 31 located at the rear end.
(See FIG. 7) At the same time, the biasing force of the spring 27 is reversed downward, and the pawl 26 is engaged and held by the teeth 31, thereby fixing the safety pillow 10 at the rearward moving end. Thereafter, by moving the safety pillow 10 forward, the pawl 26 sequentially engages each of the teeth 31 of the receiving plate 30 to fix the safety pillow 10 in its adjusted position.

As can be understood from the above explanation, in the headrest device of the present invention, as exemplified in the above embodiment, a soft synthetic resin is provided with a plurality of teeth 31 corresponding to each tooth 25 of the support plate 23a. A receiving plate 30 made of an elastic material such as the like is integrally fixed to the side surface of the supporting plate 23a so that the upper surface of each toothed portion 31 of the receiving plate 30 projects slightly upwardly than the upper surface of each toothed portion 25 of the supporting plate 23a, The pawl 26 is attached to each toothed portion 31 of the receiving plate 30.
Its structural feature lies in the fact that it selectively engages with the upper surface of the holder. With this configuration, the receiving plate 3
Each of the toothed portions 31 of the pole 26 absorbs the impact sound caused by the collision with the pawl 26, eliminating unpleasant impact noise for the occupants, and engages with the toothed portion 25 of the support plate 23a of the pawl 26 in the event of a vehicle collision. Thus, the safety pillow 10 can be fixed against the load applied thereto, and the occupant's head can be reliably protected. Further, according to the above configuration, since the pole 26 selectively engages with the teeth 31 of the receiving plate 30 when adjusting the safety pillow 10, the degree of wear of each tooth 31 is small and sufficient durability is ensured. be able to.

[Brief explanation of drawings]

FIG. 1 is a side view of a headrest device for a vehicle seat to which the present invention is applied, FIG. 2 is a perspective view showing the internal mechanism of the headrest device, and FIG.
A perspective view of the support plate and receiving plate shown in the figure, Figure 4 is a sectional view taken along the line - in Figure 3, and Figures 5 to 7 show the positional relationship between the pole and support plate shown in Figure 2. It is an explanatory diagram. Explanation of symbols 10...Safety pillow, 13a, 13b...
A pair of side plates, 14a, 14b...link arm, 2
0...backrest, 21a, 21b...pair of stays,
23a, 23b...Pair of support plates, 25...Tooth portion of support plate, 26...Pole, 27...Spring, 28,
29... Protrusion, 30... Receiver plate, 31... Teeth portion of the receiver plate.

Claims (1)

[Claims] 1. A pair of support plates are integrally assembled facing each other to the upper ends of a pair of stays that are fixed to the backrest of a vehicle seat at a predetermined interval so as to be vertically adjustable; A pair of side plates are fixed to the inside of the safety pillow facing each other at a predetermined interval, and each side plate is connected to each of the support plates so as to be movable in the longitudinal direction of the seat, and at least one of the support plates is A headrest device comprising: a plurality of toothed portions disposed in the front-rear direction on the upper portion of the head restraint device; and a pole attached to the side plate adjacent to the support plate selectively engaged with a pole attached to the side plate adjacent to the support plate with a spring. In this step, a receiving plate made of an elastic material such as a soft synthetic resin is provided with a plurality of teeth corresponding to each tooth of the support plate, and the upper surface of each tooth is slightly above the upper surface of each tooth of the support plate. A headrest for a vehicle seat, characterized in that the pawl is integrally fixed to a side surface of the support plate so as to protrude from the support plate, so that the pawl selectively engages with the upper surface of each toothed portion of the support plate. Device.