JPS6316121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a vehicle seat having a novel structure that allows cushioning performance to be adjusted and changed in accordance with differences in body shape, weight, etc. of occupants.

[Background technology of the invention]

For seats installed in automobiles, etc., in order to reduce passenger fatigue, it is extremely important to select the optimal cushioning performance that includes the seat's spring constant characteristics, load-deflection characteristics, body pressure distribution, etc. be.

Theoretically, this cushioning performance can be determined to be optimal considering the occupant's body shape, weight, and other factors, but in reality, it is designed to fit a standard body shape, so it is not practical in practice. It is not necessarily possible to provide ideal cushioning performance to all occupants who have different body shapes and weights. As a result, for some people, the seats felt hard and caused pain, such as body aches, while for others, the cushions were too soft, causing fatigue.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and
To provide a seat in which the cushioning performance of the seat can be adjusted to soft or hard according to the individual's preference, depending on individual differences in body shape, weight, etc.

The cushion performance adjustment according to the invention can be carried out in either or both of the seat part and the back part of the seat.

[Summary of the invention]

In the seat of the present invention, one end of a group of suspension springs is attached to each opposite side of a substantially rectangular seat frame, and a seat portion or a backrest portion of the seat is provided between each other end of both spring groups. By suspending and supporting the elastic member to be placed in the center, the seat can have dual elasticity of the elasticity of the central elastic member, which has different characteristics from the suspension spring, and the elasticity of the group of suspension springs. , a rigid suspension structure is provided for the central elastic member, and if necessary, this rigid suspension structure is operated to seal the elasticity of the suspension spring group and only the elasticity of the central elastic member is activated, or a rigid suspension structure is provided. It is designed to release the body's functions and utilize the dual elasticity described above.

The rigid suspension structure is disposed between the seat frame and the central elastic member under the suspension spring group or at a location where the suspension spring group is not disposed, and has one end connected to the seat frame. A rigid plate-like member is pivotally supported on the side and has its other end hooked to the side of the central elastic member, and the plate-like member engages with and separates from the plate-like member or frame so as to prevent pivoting of the plate-like member. It consists of a rotatable stopper member.

When the pivoting is prevented, the plate member becomes a member that rigidly suspends the central elastic member from the frame, and the cushioning performance of the seat is carried only by the central elastic member, so that the seat exhibits a stiff cushioning property. When the wedging on the plate member is released, the plate member stops or reduces its rigid support to the central elastic member, and the elasticity of the suspension spring group is added to the elasticity of the central elastic member, improving the cushioning properties of the seat. becomes soft.

[Embodiments of the invention]

Several embodiments of the present invention will be described below with reference to the drawings.

Figures 1 to 4 show the first embodiment; Figure 1 is a plan view, Figure 2 is a front view together with the skin material, and Figures 3 and 4 are Figures 1A-A. This is an enlarged view of the end face cut along the line, showing the rigid suspension structure in a wedged state (Fig. 3) and in a released state (Fig. 4).

In these figures, the seat of the present invention has a substantially rectangular seat frame 1 with an upright outer periphery, a spring holding bracket 2 is integrated with the seat frame 1, and one end of a plurality of suspension springs 3 is fixed to the seat frame 1. ing. The other end of the spring 3 elastically supports an elastic member 4 disposed at the center of the seat (the sitting portion in the first embodiment).

The elastic member 4 shown in the first embodiment is surrounded by a frame 5, to which a large number of linear elastic bodies 16, such as elastic wires or piano wires, are stretched. In addition to this, the central elastic member 4 may have a structure shown as a modification in FIG. 5, for example, or others. The modified example shown in FIG.
A large number of S-shaped springs 17 are placed in tension.

A hinge bracket 6 is fixed to the spring holding bracket 2 below the suspension spring 3, and one end of a horizontally elongated plate member 7 is pivotably hinged to the hinge bracket 6, forming a part of a rigid suspension structure. are doing. The other end of the plate member 7 is connected to the central elastic member 4.
It is hung on the frame 5 of.

A protruding piece 8 is provided on the back surface of the plate-like member 7, and a protruding piece 9 is provided on the bottom of the frame 1, and a stopper operation rod 10 disposed in parallel below the plate-like member 7 is rotatable on the protruding piece 9. It is inserted through and supported. 1st
In the illustrated example, the rods 10 are provided one on each side of the seat and can be operated independently. Link pieces 11 are fixed to appropriate locations on each rod 10, two locations in the figure, so that they can rotate together with the rod 10.

Another link piece 12 is pivotally attached to the protruding piece 8 on the back side of the plate member 7, and the two link pieces 11, 1
The two proximal ends are connected by a pin 13 to form a link-like stopper member 15. link piece 1
One side edge 12' of 2 is an engaging edge that engages with the back surface of the plate-like member 7 (FIG. 3) and disengages (FIG. 4). In addition, 14 in the figure is a handle of the stopper operating rod 10.

In this way, the rigid suspension structure consisting of the pivot plate member 7 and the rotation stopper member 15 becomes a rigid support structure for the central elastic member 4 when put in the wedged state as shown in FIG. When the suspension spring 3 is released, the elasticity of the suspension spring 3 is exhibited.
That is, the operating rod 10 can be operated by holding the handle 14.
By turning in one direction (clockwise in FIG. 3), one link piece 12 constituting the stopper member 15 is rotated.
One side edge 12' of is firmly engaged with the back surface of the plate member 7,
The plate member 7 is now wedged. At this time, even if a load (arrow) is applied from above the seat, the rigid suspension structures 7 and 15 are functioning, so the elasticity of the suspension spring 3 is suppressed, and the frame 5 itself cannot move up and down, and the cushion Almost all of the performance depends on the elasticity of the elastic member 4, that is, the elasticity of the wire 16 and the S-shaped spring 17, and the spring constant of the seat becomes high. On the other hand, if the operating rod 10 is rotated counterclockwise to disengage the engagement edge 12' of the link piece 12 from the plate member 7 as shown in FIG. The wedging is released and the elasticity of the suspension spring 3 is restored, so the frame 5 elastically moves up and down in response to the load from above, and the elasticity of the central elastic member 4 is added to this, so that the spring A low constant, that is, a soft cushion performance is exhibited.

In the above description, the group of suspension springs 3 and the rigid suspension structures 7, 15 are installed on the same side of the seat in a vertical relationship, but the present invention is not limited to this. For example, in FIG. 1, the three groups of springs can be separately arranged along the left and right sides of the seat frame structure 1, and the rigid suspension structures 7 and 15 can be separately arranged along the front and rear (top and bottom in FIG. 1) sides. In this case, the handle 14 of the operating rod 10 will protrude laterally of the seat.

Although two sets of link pieces 11 and 12 constituting the stopper member 15 are shown in FIG. 1 as being provided on each of the left and right operating rods 10, more links may be provided as needed. This is explained in the 6th section below.
The same applies to other embodiments of the stopper member shown in FIGS.

FIG. 6 shows another embodiment of the stopper member 15. In this case as well, the two link pieces 11a and 12a are used as constituent elements, but one end edge 11a' of the lower link piece 11a is connected to the seat. The difference is that the plate member 7 is wedged by being engaged with the bottom surface of the frame 1.

FIG. 7 shows still another embodiment of the stopper member 15, in which it is not a link but a single link.
A cam plate 19 is fixed to the operating rod 10, and its end edge 19' is wedged into engagement with the plate member 7.

Other stopper members, although not shown, can be used, for example, by hinged stopper pieces on the bottom of the seat frame, and by pulling forward or backward an operating rod that connects or inserts the stopper pieces, the stopper pieces can be raised up. A structure in which the stopper member is wedged and engaged with the bottom surface of the plate-like member 7 is also possible, and in any case, the stopper member is not limited to what has been described and illustrated above.

Although the above description has been made of adjusting and changing the cushioning performance of the seat, particularly the sitting part, it is clear that the present invention can be applied not only to the sitting part but also to the back part of the seat. This example is shown in the 8th example.
As shown in the figure. A is a sitting part, and b is a backrest part. In FIG. 8, a total of four sets of rigid suspension structures 7 and 15, each of which can be operated independently, are installed on the two sides of the front and back of the sitting part a of the seat, and on the two sides of the top and bottom of the backrest part b. In this way, in addition to adjusting the spring constant of the seat, the seat area a can be adjusted according to the occupant's body shape, weight, etc.
By independently changing the hardness of the front and rear edges of the body and the upper and lower edges of the backrest part b, it is effective to adjust the body pressure distribution. For example, the front edge of the sitting part a is made hard and the rear edge is made soft, the lower edge of the backrest part b is made hard and the upper edge is made soft, or both the front and rear edges of the sitting part a are made hard,
By making the upper and lower edges of the backrest part b soft or by making various other combinations, it is possible to select the most appropriate cushioning performance according to the passenger's preference.

As described above, it is very convenient to provide independent cushion performance adjustment mechanisms on each edge of the seat, but the present invention is not limited to this. The cushion performance adjustment mechanism of the left and right operating rods 10, 10 are linked by one connecting rod, and one handle 1
Of course, it is also possible to adjust the left and right sides simultaneously by the operation in step 4.

In the illustrated embodiment, a spring retaining bracket 2 is attached to the seat frame 1, but this is for convenience in manufacturing. Of course, it may also be used as a pivot point for the plate member 7.

〔Effect of the invention〕

As described in detail above, according to the present invention, the spring constant of the seat can be changed at will according to the individual differences in the body shape and weight of the occupant, and the cushioning performance of the seat can be uniformly adjusted over the entire seat surface. Since each part can be adjusted in various ways, passengers can enjoy the optimal cushioning performance according to individual differences and preferences, and there is no need to endure the uniformity of standard cushioning, making vehicle operation more comfortable. It has the effect of making you feel at ease.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the seat structure according to the present invention, Fig. 2 is a front view showing the seat structure shown in Fig. 1 covered with a skin material, and Fig. 3 is taken along the line AA in Fig. 1. FIG. 4 is an enlarged view of the end face of the cut portion showing a state in which the stopper member is wedged, FIG. 4 also shows a state in which the stopper member is released, and FIG. 5 is a plan view showing a modification of the central elastic member. FIG. 6 is an enlarged view of the end of a cut part similar to FIG. 3 showing another embodiment of the stopper member, FIG. 7 is a diagram showing still another embodiment of the stopper member, and FIG. 8 is a seat part and backrest. FIG. Main symbols, 1...Seat frame structure, 3...Suspension spring, 4...Central elastic member, 5...Frame body, 7...Rigid suspension member (plate member), 10...Operation rod, 1
1, 12; 11a; 12a... link piece, 15... stopper member, 19... cam plate, 11a', 1
2', 19'...engaging edge.

Claims (1)

[Claims] 1. A seat frame, a suspension spring having one end attached to each opposite side of the seat frame, a central elastic member attached between each other opposite end of the suspension spring, and a central elastic member having one end attached to the seat frame. A rigid suspension member that is pivoted on one side and hooked on the central elastic member at the other end, and an engagement edge that wedges the rigid suspension member in a non-pivotable manner, and can be rotated between a wedge position and a release position. A seat characterized by having a stopper member. 2. The seat according to claim 1, wherein the rigid suspension member is a plate-like member disposed below the suspension spring, and one end of the plate-like member is attached to the opposite side of the seat frame. A seat that is hinged and has its other end hooked to a central elastic member. 3. The seat according to claim 1, wherein the rigid suspension member is a plate-like member disposed between a seat frame in which no suspension spring is disposed and a central elastic member, and One end of the shaped member is hinged to the other side sandwiched between the opposite sides of the seat frame, and the other end is hooked to the central elastic member. 4. The seat according to claim 1, wherein the stopper member is a link piece fixed at one end to a rotatable operating rod disposed on the bottom of the seat frame in parallel with the rigid suspension member; and another link piece having one end pivotally connected to the rigid suspension member and the other end pivotally connected to the back surface of the rigid suspension member, and one side edge of the other link piece engages with the back surface of the rigid suspension member. The seats that make up the joint. 5. The seat according to claim 1, wherein the stopper member is a link piece fixed at one end to a rotatable operating rod disposed on the bottom of the seat frame parallel to the rigid suspension member; and another link piece with one end pivotally connected to this and the other end pivotally connected to the back surface of the rigid suspension member, and one end edge of the first link piece engages with the upper surface of the bottom of the seat frame. The seats that make up the joint. 6. The seat according to claim 1, wherein the stopper member comprises a cam plate fixed at one end to a rotatable operating rod arranged on the bottom of the seat frame parallel to the rigid suspension member. , a seat whose other edge constitutes an engaging edge that engages with the back surface of the rigid suspension member.