JPH0666391U - Structure to change backrest angle and seat angle, and waist angle and back angle of reclining seat - Google Patents

Abstract

(57) [Summary] [Purpose] Users of reclining seats can feel more relaxed without feeling tired even when used for a long time. [Structure] A seat strut 1 fixed to a seat strut shaft A and a backrest strut 2 fixed to a backrest strut shaft B are connected by a guide slot 11 and a seat angle control pin 10. The backrest support column 2 includes a back cushion support column 7 and a waist cushion support column 6, a back cushion support column 4, and a waist cushion support column 3.
Is locked through.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a device for changing the angles of the back, waist and seat with respect to the inclination angle of the backrest angle in order to further increase the feeling of relaxation and rest, which is the purpose of the reclining seat for the occupant of the vehicle. Regarding

[0002]

[Prior art]

 Conventionally, this type of reclining seat lowers the rear end of the seat in response to changes in the backrest angle (for example, Japanese Utility Model Laid-Open No. 56-27049 and Japanese Patent Laid-Open No. 60-207612), the seat portion is moved forward. It is known that the slide is carried out (Japanese Patent Laid-Open No. 61-560609).

Therefore, when the backrest is tilted, the line of sight is lowered along with the sitting position, which causes discomfort, and a large fulcrum is required to restore the seat because the fulcrum for changing the seat angle is at the front. , In a limited installation environment, sliding the front part of the seat narrows the space under your feet.

[0004]

[Problems to be solved by the device]

 The reclining seats installed in conventional passenger cars have almost the same function for the driver and other passengers, and the driver can respond to shaking, braking, stopping, etc. with the steering wheel or petals. On the other hand, the occupant depends heavily on the seat, and especially in medium and long distance buses, the body slides forward due to inertia during seat tilt, and the knees are placed on the back of the front seat back. There was a sense of instability, such as supporting the body.

The present invention aims to provide a reclining seat that allows a user to safely and comfortably use a vehicle in a limited seat installation space.

[0006]

[Means for Solving the Problem] In order to solve the problem, the angle of the seat in a substantially horizontal position is interlocked with the backrest, the backrest column is tilted, and the angle of the seat is raised appropriately rearward. , The user's own weight is moved to the rear, the back rest of the back cushion is divided into the waist and the back, and the user's own gravity causes the waist and back cushion angles to be adjusted according to the user's back. It is a thing.

The seat angle is changed by pressing the position closer to the back surface than the seat support shaft with the backrest support tip with the backrest support shaft as a fulcrum by applying the lever principle.

Therefore, a pin for connecting to the seat support column is provided at the lower end of the backrest support column, but this pin requires appropriate rigidity for the reason described later.

This pin is for controlling the seat angle, and is connected to the same pin guide slot located closer to the back than the shaft of the seat strut, so that it is located on the back side of the fulcrum of the seat. Even if locally weighted, it is safe for children to stand, for example.

The bending of the waist and back cushion angles is made by the user's own leaning force applied to the inside of the waist cushion strut shaft attached to the backrest strut and the back cushion strut shaft.

A cam is fixed to the lumbar cushion strut shaft, and a pin is fixed to the lumbar cushion strut upper end, which is in close contact with the leaf spring fixed to the backrest strut, and is connected to a long hole at the back cushion strut lower end. The back strut is also linked with.

By changing the shape of this cam, a variable angle can be set within the movable range of the waist and back cushion columns, and the movable range of the waist and back cushion columns can be adjusted according to the purpose of use of this sheet. Can be set

This function can be divided according to the purpose of use and the installation environment.

[0014]

[Action]

 The reclining seat configured as described above moves the center of gravity of the body to the internal angle of the seat when the user reclines the backrest and moves the center of gravity of the body to the seat internal angle. Since the cushion leans inward so that it closely contacts the back, the body is held deep in the seat, and the back cushion raises the upper part of the body, so that the line of sight is also peeled forward to provide a sense of stability.

Therefore, when the vehicle shakes, brakes, or stops, forward slip of the body due to inertia is suppressed and the seated posture is stabilized.

Further, since this device has a simple structure, it can be easily incorporated into various conventional techniques and can be applied to an aisle side seat of a bus. It can also be used as an easy chair for indoor use.

[0017]

【Example】

 An embodiment will be described with reference to the drawings. In FIG. 1, the shaft portion A and the shaft portion B are horizontal and serve as a main part on the main body side that is attached and installed. The axis A is approximately in the center of the seat column 1, and is approximately at the center of gravity of the user. The seat strut 1 is bent downward so as to remove the shaft portion B on the backrest side, and a pin guide long hole for fitting the seat angle control pin 10 at the lower end of the backrest strut 2 at the tip end on the backrest side. Turn on 11. Backrest The lower part of the support column 2 is bent rearward from the axis B portion, and a seat angle control pin 10 connected to the long pin guide hole 11 is fixed to the tip end thereof through the control pin reinforcing block 12 shown in FIG. The seat angle control pin 10 has a circular locus with the axis B as a fulcrum within the range of the movable angle of the backrest support column 2. This thickness is such that the pin guide slot 11 slides lightly and there is no rattling. The load shall be sufficient to withstand the load. Further, a sliding member may be fitted in the pin guide elongated hole 11 and the seat angle control pin 10 may be connected thereto. Backrest prop prevention expansion columns 13 prevent the backrest props 2 from spreading. The backrest angle fixing device can be installed on the shaft A portion, the shaft B portion, the pin guide elongated hole 11 portion, etc. depending on the purpose of use.

In the embodiment shown in FIG. 2, the backrest support column 2 is U-shaped, and the waist cushion support column shaft 3 and the back cushion support column shaft 4 are engaged therethrough. Lumbar cushion strut 6 The upper end of the back cushion strut 6 is bent in the shape of a crank, and the lumbar cushion strut pin 5 that interlocks the back cushion strut 7 is fixed to its tip, and the back cushion strut elongate hole 14 is attached to the lower tip of the back cushion strut 7. Attached to this pin 5, the lumbar cushion strut shaft 3 is fixed through the cam 8 and is also fixed to the lumbar cushion strut 6. The cam 8 is in close contact with the leaf spring 9 whose upper part is fixed to the backrest strut 2. The cam 8 has an isosceles triangular shape, and the longest side thereof is in close contact with the leaf spring 9.

In the embodiment shown in FIG. 3, the cam 8 rotates from the waist cushion support 6 via the shaft 3 and presses the leaf spring 9, so that it is preferable that the corner tip has a rounded shape. The movable range angle of the waist cushion column 6 is until the leaf spring 9 is pressed against the backrest column wall. The upper portion of the leaf spring 9 is fixed to the backrest column 2, and the lower portion thereof is provided with a long hole having a length within the range of expansion and contraction of the leaf spring 9, and is engaged with a pin fixed to the backrest column 2. The strength of the plate sill 9 should be such that it can return the lumbar cushion struts 6 and the back cushion struts 7 to the neutral position when there is no load. If the device can be filled with a simple structure, a torsion spring is attached to the waist column shaft 3, and both ends of the spring are locked to the backrest column 2 and the waist cushion column 6, respectively. And the leaf spring 9 can be replaced.

[0020]

[Effect of device]

 The present invention is configured as described above and has the following effects.

As the seat back is tilted and the seat seat is tilted inward and the center of gravity of the user is moved to the seat internal angle, the forward slip of the body due to inertia such as when braking or stopping is suppressed. Since the seat column shaft is located in the center of the seat column near the backrest, it can be operated lightly in relation to the backrest, its column shaft, and the seat angle control pin arrangement. Further, the seat portion does not narrow the space under the foot because it makes a rotary motion about the seat support shaft.

The waist cushion shaft and the back cushion shaft are locked to the backrest column, and their positions can be set at appropriate positions depending on the purpose of use of the reclining seat and the installation environment. By connecting the pin at the upper end of the lumbar cushion strut and the long hole at the lower part of the back cushion strut, the angle within the movable range is changed so as to be in close contact with the roundness of the back due to the user's leaning force applied to the outside of both shafts. However, since the strength of the leaf spring for restoration is only enough to return both the waist and back cushions to their normal positions, there is no sense of pressure.

In addition, depending on the installation environment, this reclining seat may have different shapes for the seat and the backrest by changing the shape of the pin guide elongated hole of the seat strut or the positions of the seat strut shaft and the backrest strut shaft. The angle and angle ratio can be set freely, and the movable range and angle ratio can be set freely by changing the positions of the back cushion, both waist cushion shafts, and the cam shape of the waist cushion shaft.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a reclining seat column portion.

FIG. 2 is a rear view showing an embodiment of a waist cushion strut and a back cushion strut.

FIG. 3 is a side view showing an embodiment of a waist cushion strut and a back cushion strut.

[Explanation of symbols]

 A seat prop shaft B backrest prop shaft 1 seat prop 2 backrest prop 3 lumbar cushion prop shaft 4 back cushion prop shaft 5 lumbar cushion prop pin 6 lumbar cushion prop 7 back cushion prop 8 cam 9 leaf spring 10 sitting angle control pin 11 Pin guide slot 12 Reinforcement block 13 Backrest support column Expansion column 14 Back cushion support column slot

Claims (3)

[Scope of utility model registration request] 1. A structure in which a backrest angle and a seat angle are interlocked with the backrest support shaft (B) as a fulcrum to apply the lever principle. 2. A structure for interlocking the angles of a waist cushion strut (6) and a back cushion strut (7) attached to a backrest strut (2) via shafts (3) and (4). 3. The axes (A), (B), depending on the installation environment.
The desired angle or angle ratio can be arbitrarily set by changing the positions of (3) and (4) and the shapes of the cam (9) and the pin guide elongated hole (11). Structure to change the angle of each part.