JPS6282911A - Headrest - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a headrest for a seat in a passenger car, etc., and in particular, a support surface for an occupant's head has a hole opening in the front-rear direction at the center of the support surface. Regarding opening headrests.

[Prior Art] As a headrest for a seat in a passenger car or the like, there is a generally donut-shaped headrest that has a hole that opens in the front-rear direction at approximately the center of a support surface that supports the head of an occupant. Here, the longitudinal direction refers to the side of the headrest that supports the back of the occupant's head as the front side, and the opposite side as the rear side. Note that the vertical direction refers to the seat connection side of the headrest as the lower side, and the opposite side as the upper side.

Such a perforated dress has been increasingly used in recent years because it improves rear visibility and improves head ventilation.

Therefore, conventional examples of perforated hemlock rests are shown in FIGS. 5 to 9 below.

The perforated headrest shown in FIGS. 5 to 7 is a first conventional example, and only the frame portion is shown by solid lines. That is, a frame 2 press-molded from a steel plate is embedded inside a perforated headrest 1 whose outer shape is shown by a two-dot chain line, and a round bar-shaped steel stay 3 protrudes outside the perforated headrest 1 below the frame 2. Fix one end of it. Hereinafter, this type of frame will be referred to as a press frame.

The frame 2 is press-molded to have a substantially U-shaped cross section so as to surround a hole 4 opening in the front-rear direction at the center of the perforated headrest 1 (see FIG. 6). As shown in FIG. 7, the ends of the two stays 3 provided on the left and right in the grooves on both sides are welded, respectively, and the lower ends of each stay extend downward and protrude from the headrest l.

The stay 3 is a member for attaching a headrest to the top of the seat and vertically extending the headrest to a height of A.

A second conventional example is shown in FIGS. 8 and 9.

Similar to the first conventional example, this conventional example also shows only the frame with a solid line, and is different from the first conventional example in that the frame 5 is made of pipe material and the lower end of the frame is directly connected to the stay 6. Different from the example.

Hereinafter, this type of frame will be referred to as a pipe frame.

The frame 5 is made by bending a pipe member into a substantially inverted U shape, and has both ends extending downward so as to surround the hole 4 and protrude from the perforated headrest l. Further, a reinforcing member 7 is horizontally suspended between the stays 6 and 6 along the lower side of the hole 4.

As shown in FIG. 9, a perforated headrest is constructed by covering the frame 5 with a cushioning material 8 with or without a skin. 9 is the head of the rear passenger.

[Problems to be Solved by the Invention] 1. The press frame, which is the first conventional example, has various problems. Namely, this type of frame needs to have a predetermined strength depending on the press shape. Therefore, the shape of the force is complicated, and advanced manufacturing technology is required in terms of mold production, etc.

Moreover, due to press molding, the width of the frame has to be increased to some extent due to processing constraints, etc. As a result, the thickness etc. increase and the external shape of the perforated headrest l increases, which creates constraints on compactness. Become.

Further, the upper end of the stay 3 must be integrally welded to the frame 2 to share the strength of the frame. Therefore, the accuracy of mounting the stay 3 is extremely important as it affects the frame strength. However, in order to weld the stay 3 to the frame 2, the stay 3 must be welded to the frame 2.
Correspondingly, the product must be bent and formed in a complicated manner in many places.If the product is bent in many places and formed into a complicated shape, inevitably there will be many factors that will disrupt the precision of the installation. Therefore, care must be taken to maintain the accuracy of welding the stay 3 to the frame 2. Also, as a matter of course, the frame 2 and stay 3 are molded separately,
Since these are welded, the number of culms increases, which reduces workability.

The second conventional pipe frame overcomes all of the problems with the press frame. However, as shown in FIG. 9, when the head of the rear passenger C1 collides, since the pipe frame has a high strength, unlike a press frame, the pipe frame absorbs a small amount of impact due to plastic deformation, resulting in inferior impact absorption. Conversely, since the repulsion from the pipe frame is large, the impact that the colliding head receives from the pipe frame becomes large. Therefore, in order to improve the shock absorption of the headrest, it is possible to reduce the strength of the pipe frame and make it easier to deform plastically, but the frame itself
Since a specified strength is required by standards, it is not easy to reduce the strength. the result,! i? It is extremely difficult to design a pipe frame that has a high absorbent capacity and still has a certain strength (11).

Moreover, as shown in FIG. 9, the cushioning material 8 easily rotates around the frame 5 when the headrest is held at the top or side part during impact or for vertical adjustment, resulting in holes being formed. The headrest tends to have a twisted appearance along the periphery of the frame 5, which tends to spoil the external shape.

This invention is intended to solve these problems, and aims to improve shock absorption and prevent deformation of the external shape by attaching a subframe to the main frame in the form of a pipe frame. do.

[L stage for solving the problem] In order to achieve the above object, the present invention provides a hole that opens in the front and back direction at approximately the center of a support surface that supports the head of an occupant, and a hole that opens in the front and rear direction. In a perforated headrest having a pipe-shaped main frame disposed in at least a part of the main frame, a sub-frame that can be more easily deformed than the main frame is provided at least on one side of the upper part of the main frame at a distance. It is characterized by this.

[Operation of the invention] When the occupant's head collides with the headrest, the subframe first deforms, and the entire subframe and the cushioning material integrated with it disperse and absorb the impact from the head, and reduce the acceleration of the impact. The main frame then most thoroughly absorbs the impact from the head weakened by the subframe. At this time, the main frame's repulsion is weak, and the impact on the head is also weak.

Furthermore, since the main frame and sub-frame are spaced apart from each other within the cushioning material, the cushioning material will not rotate even if the top or side of the headrest is held for vertical adjustment or if there is a collision.

[Example] Examples of the present invention are shown in FIGS. 1 to 4. This headrest IO has a hole 11 that opens in the front-rear direction approximately at the center of the support surface.

Inside the headrest 1O, there is a main frame 1 surrounding the hole 11.
2 is included. Both free ends of the main frame 12 (7) extend downward and protrude outside the hendres 10 to form stays 13. Further, on the outside of the main frame 12, a sub-frame 14 is provided, which is enclosed in the headrest 0, and is provided with a sub-frame 14 that is spaced apart from the main frame 12 and runs along the main frame 12. The subframe 14 constitutes a rigid core of the headrest 10.

FIG. 2 shows the structure of only the frame portion. The main frame 12 is made of metal pipes shaped like an inverted U, with both sides ts and t.
s and an upper side 16, and are bent inward within the lower part of the headrest 10 to form a bent part 17.17, between which a reinforcing member 18 is horizontally fixed to form a lower side. side part 15.15, top side 16 and reinforcing member 18'4
This forms a rectangular frame, and a space 19 corresponding to the hole 11 and slightly larger than the hole 11 is formed inside the frame formed by these.

The sub-frame 14 is made of an appropriate material such as a small-diameter W4 wire that is more easily deformed than the main frame 12, and has a lower side 20,
It is a frame-shaped member consisting of side sides 21.21 and L sides 22.

Further, the sub-frame 14 has a slightly larger outer circumference than the t-frame 12 and is disposed along the outer circumference of the main frame 12.

The lower side 20 is formed by bending both ends of the subframe 14 downward to the reinforcing member 18, and welding the tip to the reinforcing member 18. The sides 21 are both sides 15.1
5 and is bent so as to extend forward. The upper side 22 is disposed above and diagonally rearward of the L side 16 of the main frame, and a portion thereof is bent and fixed to the L side 16.

Note that 24 is a lock groove formed in the stay 13 for vertical adjustment.

As shown in FIG. 3, the main frame 12 and subframe 14 are integrally covered with a cushioning material 25 such as polyurethane foam. Cushion material 2
The surface of 5 may be covered with a skin such as cloth or vinyl chloride leather, or may have a skinless structure without a skin.

Next, the operation of this embodiment will be explained based on FIGS. 3 and 4.

Now, the headrest 10 is attached by the stay 13.

When installed on the top of the seat (not shown), if a large negative acceleration is applied to the rear seat occupant due to sudden braking, etc., the head H will swing in the direction of the arrow (forward), causing the headless occupant to become headless. It collided with the rear side of the top of No. 10. The impact load caused by this collision is first transmitted by the cushioning material 25 and then distributed to the inner core. Therefore, FIG. 4 schematically shows the shock absorption process of the core body. In other words, the collision of the head H first acts on the L side 22, greatly deforming the upper side 22 as shown by the two-dot chain line, and increasing the acceleration. and absorb impact energy. At the same time, subframe 14 -
[-The impact load of the head H applied to the side 22 is calculated as each side 21.
20 etc., and is also dispersed in the cushioning material 25 that is integrated with the subframe 14, so that energy can be absorbed more effectively. After that, the J-side 22 continues to deform further, and even if the main frame side 16 directly receives the impact load from the head H, the impact load that reaches the top side 16 is extremely weakened. The repulsive force from the side 16 is also small, and as a result, the upper side 16 does not exert a large impact on the head H.

Furthermore, the cushioning material 25 is a core body inside the cushioning material 25, and is supported by two frames spaced apart from each other, that is, the main frame 12 and the subframe 14, so that it cannot easily rotate. Therefore, there is no twisting and the external shape is maintained well.

Note that the present invention is not limited to the above embodiments,
This is me in various forms.

The main frame is not limited to a round vibrator, but may also be of various irregular cross-sections, such as a square pipe.

In addition, it is preferable that the subframe has elasticity;
It does not necessarily need to be elastic; for example, it may be made of a belt-shaped sheet of soft iron.

Furthermore, the shape of the L frame and subframe does not necessarily have to be substantially quadrilateral surrounding the hole in the headrest.

[Effects of the Invention] Even if the main frame is of a vibrator frame type, the headrest of the present invention has a sub-frame, so it can disperse the impact load well in the event of a single head collision, and has excellent impact absorption. ing. Furthermore, since the proportion of the impact load that the main frame must directly share is reduced, the impact that is applied to the head due to the repulsion of the main frame is also reduced. Therefore, although it is a pipe frame type, the main frame can maintain a predetermined strength while at the same time absorbing the impact caused by a head collision well, resulting in a frame that is extremely easy to design.

Furthermore, in the event of a collision or up/down yJtM, it may twist,
The key is to maintain a good external shape without rotational deformation.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention, in which FIG. 1 is a non-oblique view, FIG. 2 is a perspective view of main parts, FIG. 3 is a partially cutaway side view, and FIG. The figure is a perspective view of main parts showing the operation. 5 to 7 show the first conventional example, FIG. 5 is a perspective view, FIG. 6 is a sectional view taken along the line Vl-VI in FIG. 5, and FIG. 7 is an external view in the direction of FIG. It is. 8+4 to 9 show a second conventional example, in which FIG. 8 is a perspective view and FIG. 9 is a partially cutaway side view showing the operation. (Explanation of symbols) 10... Headrest, 11... Hole, l 2-
Main frame, 13... Stay, 14... Sub frame, 25... Cushion material, H... Head of square t1.

Claims (1)

[Claims] A perforated headrest in which a hole opening in the front-rear direction is provided at approximately the center of a support surface that supports the head of an occupant, and a pipe-shaped main frame is disposed at least in part around the hole, A headrest characterized in that a sub-frame that can be more easily deformed than the main frame is provided at least at a distance above the upper part of the main frame.