JPH0541064Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a shock absorber suitable for use in vehicle seats and the like.

(Prior art) Seats, backrests, and floors mounted on vehicles, boats, etc. are supported, for example, by parallel X-shaped links at both ends of the seat body, and shocks and vibrations transmitted to the seat body from the floor etc. Some seat bodies are supported by springs and dampers in order to absorb this.

(Problems with the design) In such a seat, the X-shaped links, springs, and dampers are all housed between the seat body and the lower seat base, so if there is not enough operating space between them, For example, it may become difficult to ensure the stroke of the damper, and a satisfactory buffering function may not be obtained. However, in vehicles and boats where space is limited, there is a demand to save space by storing everything other than the seat as compact as possible, and to use the remaining space for other purposes such as storing luggage. It was difficult to secure enough space for the equipment.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a compact and high-performance shock absorbing device for seats.

(Means for Solving the Problems) The present invention is a horizontal pipe in which the legs on both sides of a U-shaped pipe are supported freely rotatably in the vertical direction on the seat body, and the intermediate part is formed on the seat base. The legs on both sides of a similar U-shaped pipe that penetrates the elongated hole and intersects this pipe and the legs are supported freely in the vertical direction on the seat base, and the intermediate part is formed in the seat body in the horizontal direction. The intersecting parts of these legs are connected with pins, and a spring is provided to elastically support the seat body against the seat base, and two sets of connecting links are bent from a node provided in the middle. Nodes are interposed in parallel and opposite to each other between the seat body and the seat base, and a damper is interposed between these nodes.

(Function) The seat body and the intersecting legs are connected with pins.
Under a highly rigid support structure made up of a set of U-shaped pipes, it is supported parallel to the seat base, and displacement in directions other than the vertical direction is restricted. The spring elastically supports the seat body and absorbs the impact applied in the vertical direction. The two sets of connecting links bend in response to the vertical movement of the seat body, causing relative displacement of opposing nodes. The damper damps the vertical movement of the seat body by providing appropriate resistance to the relative displacement between the nodes. Furthermore, since the damper is arranged substantially horizontally, the vertical space required to house the damper is shortened.

(Example) Embodiments of the present invention are shown in FIGS. 1 to 3.

In FIG. 1, reference numeral 1 denotes an upper plate constituting a part of the seat body, and a seat surface (not shown) is formed on the upper plate 1 by a cushion or the like. Further, numeral 2 denotes a lower plate serving as a seat base that is fixed to a vehicle body or a boat body and supports the upper plate 1.

Legs 3A on both sides of a U-shaped pipe 3 are supported by the lower plate 2 via brackets 4 so as to be freely rotatable in the vertical direction. The intermediate portion 3B of this U-shaped pipe 3 passes through a horizontal elongated hole 6 of a bracket 5 fixed to the upper plate 1. Also, similar U
A leg portion 7A of the shaped pipe 7 is rotatably supported in the vertical direction by a similar bracket 8 formed on the upper plate 1 opposite to the bracket 4, and an intermediate portion 7B
passes through a horizontal elongated hole 10 in a similar bracket 9 fixed to the lower plate 2 opposite the bracket 5, as shown in FIG. Intersecting legs 3A and 7
The intersecting portion with A is rotatably connected to each other by a pin 11.

Between the upper and lower plates 1 and 2, coil springs 19 for elastically supporting the upper plate 1 are arranged at four locations inside the U-shaped pipes 3 and 7, as shown in FIG.

There is also a damper 1 between the upper and lower plates 1 and 2.
2 are arranged substantially horizontally. The damper 12 has a piston rod 14 slidably protruding from a cylinder 13 filled with hydraulic oil.
4, the hydraulic oil flowing within the cylinder 13 generates a damping force due to the flow resistance. As shown in FIG. 3, the base end of the cylinder 13 is connected to an intermediate node 16 of a connecting link 15 which is bent in a dogleg shape and has both ends rotatably connected to the centers of the upper and lower plates 1 and 2, respectively. The tip of the piston rod 14 is connected to the intermediate node 1 of a similar link 17 connecting the ends of the upper and lower plates 1 and 2.
Connect to 8. Note that the connecting links 15 and 17 are arranged with the nodes 16 and 18 facing each other.

Next, the action will be explained.

The upper plate 1 is connected directly above the lower plate 2 by two sets of X-shaped links formed by the intersecting legs 3A and 7A of the U-shaped pipes 3 and 7.
is supported parallel to. These X-shaped links have high rigidity because they are integrally connected by the intermediate parts 3B and 7B, respectively, and the upper plate 1 has the intermediate parts 3B and 7B of the U-shaped pipes 3 and 7 connected to the elongated holes 6 of the brackets 5 and 9. 10, only displacement in the vertical direction is allowed.

At the same time, the upper plate 1 is connected to the U-shaped pipes 3 and 7.
Coil springs 1 arranged at four locations inside the
9, it is elastically supported at a height corresponding to the load amount. When a shock is transmitted to the upper plate 1 or the lower plate 2, this coil spring 1
9 expands and contracts to absorb the impact.

Furthermore, when the upper plate 1 is displaced up and down,
Dog-shaped connecting links 15 and 17 connecting the upper plate 1 and the lower plate 2 are bent while horizontally displacing intermediate nodes 16 and 18, respectively, and are interposed between the nodes 16 and 18. Damper 12
expand and contract. The expansion and contraction of the damper 12 is performed by the cylinder 13.
A damping force based on this flow resistance damps the vertical movement of the upper plate 1.

At this time, the cylinder 13 and the piston rod 14 are displaced in opposite directions, so the upper plate 1
The stroke of the damper 12 as it moves up and down is sufficiently large to steadily attenuate shocks and vibrations. In this way, the comfort of the seat is maintained comfortably.

Furthermore, since the U-shaped pipes 3 and 7, the damper 12, and the coil spring 19 arranged between the upper and lower plates 1 and 2 have mutually independent structures, their assembly is easy and the layout can be arbitrary. can be changed to . Also, damper 1
Since the height of the entire shock absorbing device can be kept low by arranging the shock absorbers 2 substantially horizontally, there is no need for a wide gap between the upper plate 1 and the lower plate 2.

(Effects of the invention) As described above, the shock absorber of the invention supports the seat body with two sets of U-shaped pipes arranged in an intersecting manner, supports the seat body with the spring against the seat base, and supports the seat body with the seat base with the spring. Because a damper is interposed between the nodes of the connecting link that connects the seat base, the seat body is supported with sufficient rigidity, and the mutually independent support members are easy to assemble and can be laid out freely. .

In addition, the damper interposed between the opposing nodes of the connecting link has a large stroke with respect to the vertical movement of the seat body, so it exhibits an excellent damping function.

Furthermore, since the damper is arranged substantially horizontally, the height of the entire device can be kept low.

Therefore, according to the present invention, it is possible to obtain a compact shock absorbing device with excellent support function and shock absorbing function.

[Brief explanation of the drawing]

FIG. 1 is a side view of a shock absorber according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged vertical sectional view of a connecting link. 1... Upper plate, 2... Lower plate,
3, 7... U-shaped pipe, 3A, 7A... Legs,
3B, 7B...middle part, 6, 10...long hole, 11
... Pin, 12 ... Damper, 15, 17 ... Connection link, 16, 18 ... Node.

Claims (1)

[Scope of utility model registration request] The legs on both sides of the U-shaped pipe are supported by the seat body so that they can rotate freely in the vertical direction, and the middle part passes through a horizontal long hole formed in the seat base. The legs on both sides of similar U-shaped pipes that intersect are supported freely rotatably in the vertical direction on the seat base, and the middle part is passed through a horizontal long hole formed in the seat body, and these legs are intersected. The seat body is connected with a pin and has a spring that elastically supports the seat body against the seat base.
A feature is that two sets of connecting links bent from a node provided in the middle are interposed in parallel between the seat body and the seat base with the nodes facing each other, and a damper is interposed between these nodes. shock absorber.