JPH033071Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a vehicle seat in which a cushion of the seat is supported so as to be able to vibrate in the vertical direction.

(Prior Art) Conventionally, in a vehicle seat in which a cushion of the seat is supported so as to vibrate in the vertical direction by using a spring, for example, when there is no load, the cushion is at the top position and the cushion is at the top position when the load is not applied. In some cases, the cushion is configured to lower from the top position to the neutral position or even down position.

However, such conventional vehicle seats have a problem in that when the cushion returns from its lowered position to its top position, it feels like it is bottoming out, making the occupant uncomfortable.

A conventional example that eliminates the feeling of bottoming out at the top position is disclosed in, for example, Japanese Utility Model Application No. 57-148533. In this conventional example, when the cushion of the seat is raised from the neutral position, the spring is stretched and acts as a tension spring, and when the cushion is lowered from the neutral position, the spring is compressed and the spring acts as a tension spring. The spring is adapted to act as a compression spring.

However, in this conventional example, although there is no feeling of bottoming out at the top position, the spring acts not only as a tension spring but also as a compression spring, so the problem is that the life of the spring is shortened. The point was hot.

(Problems to be solved by the invention) The present invention has been developed by focusing on these conventional problems, and it eliminates the feeling of bottoming out at the top position and improves the durability and life of the spring. The purpose is to provide a vehicle seat that can

(Means for solving the problem) The gist of the present invention to achieve this purpose is as follows:
In a vehicle seat in which the seat cushion is supported so as to be able to vibrate in the vertical direction, a base plate fixed to the lower end of the seat cushion and a base plate fixed to the floor are connected by two arms of approximately equal length. , the two arms are connected by a spring, at least one of the connection points of the spring is shifted from an intermediate position of the arms, at least one of the connection points of the spring is shifted from the center line of each arm, and both of the arms are connected by a spring. The two arms are connected by a spring so that the connection points are provided on opposite sides of each arm, and the spring acts as a tension spring when the cushion is raised and lowered from the neutral position. Existing in vehicle seats.

(Function) In the vehicle seat, the spring stretches both when the cushion rises and falls from the neutral position, and the spring always acts as a tension spring. .

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 1, a base plate 3 is fixed to the lower end of a cushion 2 of a seat 1.
A base plate 5 is fixed on the floor 4 of the vehicle.

The base plate 3 and base plate 5 are
Two arms 6, 7 having approximately the same length are connected to each other in an inclined state. Both ends of each arm 6, 7 are pivotally supported by base plates 3, 5, respectively, and the two arms 6, 7 are connected by a spring 8.

One end 8a of the spring 8 is locked in a locking hole 6b of a locking part 6a protruding from the right side of the arm 6, and the other end 8b of the spring 8
It is locked in a locking hole 7b of a locking part 7a protruding from the left side. The locking hole 6b is formed at an intermediate position 6c of the arm 6, and the locking hole 7b is formed at an intermediate position 6c of the arm 6.
It is formed at a position shifted downward from the intermediate position 7c.

That is, one end 8a of the spring 8 and the arm 6
The connection point 9a with the arm 6 is located at a position shifted to the right from the center line 6d of the arm 6, and is located at a position corresponding to the intermediate position 6c of the arm 6. On the other hand, spring 8
A connecting point 9b between the other end 8b and the arm 7 is located at a position shifted to the left of the center line 7d of the arm 7, and located at a position shifted downward from the intermediate position 7c of the arm 7.

The action will be explained below.

FIG. 1 shows the case where the cushion 2 is in the neutral position. In this state, when a load is applied and the cushion 2 rises from this neutral position, the base plate 3 is displaced in the direction away from the base plate 5, and the arms 6,
7 further rises from the position shown in the figure, and the spring 8 stretches.

By stretching the spring 8, the spring 8 acts as a tension spring, and the tensile force of the spring 8 causes the arms 6, 7 to return to the neutral position shown in the figure, and as a result, the base plate 3
and cushion 2 returns to the neutral position.

Further, when the cushion 2 is lowered from the neutral position shown in the figure due to a load being applied, the base plate 3 is displaced in a direction approaching the base plate 5, and the arms 6 and 7 are further moved from the position shown in the figure. It falls down and the spring 8 stretches.

By stretching the spring 8, the spring 8 also acts as a tension spring in this case, and the tensile force of the spring 8 returns the arms 6, 7 to the neutral position shown in the figure, and the base plate 3 and the cushion are accordingly 2 returns to the neutral position.

In this way, when the cushion 2 of the seat 1 vibrates in the vertical direction, the spring 8 always acts as a tension spring.

In the above embodiment, one connection point 9a of the spring 8 is provided at a position shifted to the right from the center line 6d of the arm 6 and corresponds to the intermediate position 6c of the arm 6, and the other connection point 9a of the spring 8 Although the connecting point 9b is provided at a position offset to the left of the center line 7d of the arm 7 and at a position offset from the intermediate position 7c of the arm 7, the present invention is not limited to this embodiment. , at least one of the connection points 9a, 9b of the spring 8 is shifted from the intermediate positions 6c, 7c of the arms 6, 7, and the respective connection points 9a,
9b is shifted from the center line 6d, 7d of each arm 6, 7, and both connecting points 9a, 9
b may be provided so as to be shifted to opposite sides of each arm 6, 7.

(Effect of the invention) According to the vehicle seat according to the invention, the cushion of the seat returns to the neutral position between the top position and the down position.
There is no feeling of bottoming out at the top position, and the spring stretches and always acts as a tension spring both when the cushion rises and falls from the neutral position. , the durability and life of the spring are improved.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the present invention. 1... seat, 2... cushion, 3... base plate, 4... floor, 5... base plate, 6... arm, 7... arm, 8... spring, 6c, 7c... intermediate position of arm, 6d,
7d...Arm center line, 9a, 9b...Spring connection points.

Claims (1)

[Scope of utility model registration request] In a vehicle seat in which the seat cushion is supported so as to be able to vibrate in the vertical direction, a base plate fixed to the lower end of the seat cushion and a base plate fixed to the floor are approximately equal in length.
the two arms are connected by a spring, at least one of the connection points of the spring is shifted from the intermediate position of the arm, and at least one of the connection points of the spring is aligned with the center line of each arm. and the connecting points are offset from each other on opposite sides of each arm, and the two arms are provided with a spring so that the spring acts as a tension spring when the cushion is raised and lowered from a neutral position. A vehicle seat characterized by being connected by.